Indian operation personnel training outline in China

Indian operation personnel training outline in ChinaTurbine part

In order to satisfy the safety in production, and operation and maintenance need of Indian WCPCL 135MW unitthe Indian operation personnel will come to China for one-month intensive training in accordance with the contract provision so as to guarantee the training effect and truly improve the capacity of independent operations and troubleshooting for operatorsthe training method is adopted by focusing on theoretical lectures according to actual situation. It mainly aims at the same type of domestic unit WPCPL135MW units operation and maintenance for training, Site visit and study and 135MW simulator training. therefore the training programs (total: 2 working days) is as follows

WCPCL135MW135MW2

1WPCPL135MW23EH45678Steam Turbine Operation Training Contents

General Description of Turbine DG440/14.29-10N135-13.73/537/537QF-135-24135MWThis project (4 135MW coal-fired turbine-generator unit) consists of 4 x DG440/14.29-10 pulverized coal fired boilers,4xN135-13.73/537/537turbines and 4x QF-135-2 generators.

DG440/14.29-10N135-13.73/537/537QF-135-24135MW4N135-13.7/537/537-2135MW

1 N135-13.73/537/537-22 3 135MWTHA4 143.79MWVWO7.85KPa5 13.73MPa/537 2.304MPa/537 9.0 kPa(THA)(32.5)6 409.4t/h7 440t/h8 Main Technical Specifications1 Type: N135-13.7/537/5372 Model: super high pressure intermediate reheat, single shaft line, double casings and double exhaust condensing steam turbine.3 Power: 135MWT-MCR4 Maximum power: 140.96MWVWO conditions, back pressure 9.0KPa5 Rated steam parametersFresh steam:before HP main stop valve13.73MPa/537Reheat steam:before MP combined steam valve2. 304MPa/537Back pressure: 9.0kPa (THA conditions) (Design cooling water temperature 32.5)6 Rated fresh steam flow: 409.4t/h7 Maximum fresh steam flow: 440t/h8 Steam distribution mode: full electronic regulatingvalve management 9 Rotation direction: clockwise when viewed in the direction from turbine towards generator10 Speed: 3000r/min 11 Shaft line critical speed:calculated value r/min1st step1300 (generator 1st step)2nd step1807 (HIP rotor step)3rd step2559 (LP rotor step)4th step3485 (generator 2nd step)Note: Generator critical speed shall be the one that is provided by the generator manufacturer.12 Number of steam passage stages: 31 stages in all, of which:HP part:1 regulating stage + 8 pressure stages MP part:10 pressure stagesLP part:2 x 6 pressure stages13 Feed water heat recovery system: 2 HP heaters + 4 LP heaters + 1 deaerator14 Steam sealing system: self-sealing system (SSR)15 Last stage blade length: 660mm16 Last stage moving blade circular exhaust area: 24.14m2Steam turbine thermodynamic system technical process DCSDEHSCSBPCETSTSI.

Steam turbine in this power plant involves that thermodynamic system mainly hasMain reheatedsteam and bypass system, extraction steam, condensate water system; HP/LP feed water system,gland seal system, vacuum system, Circulating cooling water system and auxiliary steam system.The other system has Lube oil and jacking oil system, emergency governing system, Instrument compressed air systems, control system DCSDEHSCSBPCETSTSI, etc.Steam Turbine Thermal System Process:Water through desalination fill into the condenser, and condensate pump shaft seal heater by 1, 4 low pressure heaters into the deaerator deaerator, deaerator after condensate by Electric Speed to the pump to fight into the boiler to heat up the boost, into high temperature and high pressure steam into the turbine to promote high-speed turbine rotating turbine driven through the coupling with the generator of high-speed rotation and exporting electricity. Turbine did the power of steam discharged into the condenser, circulating water cooling into a condensation of water into the deaerator by condensate pump boost. So again and again. The role of water in power plant thermal system is the energy conversion medium.

Outline of turbine main equipment:HostOverview:4WPCPLPower Plant Project135MWsteam turbineisthemanufactureoftheDongfang Steam Turbine Works.ThemodelN135-13.73/537/537,thesteam turbineforultra-high pressure, areheat, single axis, twindual exhaustcondensing unit.End ofmachineblades660mm,unitwith a total lengthof13.5 m.The unitspeed control systemusingthefullpower transferDEH control system.This unit isthe main steamandreheat steamsystem usestheunitsystem.Therearesevenbacktotheheating,twohigh pressureheaters,deaerator,thefourlow-pressureheaters,theunit usestwoseriestosimplifythebypasssystem.Steamturbineprocesses:steamthroughthehighpressuremain steamvalvearranged in theuniton both sides,by high pressuresteam pipes,inlettube, into thehigh pressure cylinder.Thehigh-pressurepart of thereflux,andthepressurepart of theheadarrangement,share ahigh pressureoutside the cylinder,high-pressureexhaust steamre-heatbyarrangementinthepressureoftheunitson both sides ofthe jointsteam valveintothepressure cylinder.Medium-pressureexhaustconnecting pipeintothelow-pressure cylinderCentralbytwo,and move forwardafter the shunt,before the passage oftherearcylinderintothecondenser.Theunithasavariable loadandpeakingability to run,the compositetransformeroperating mode.

Technical and Economic Indicators and Guarantee Conditions1 Rated output power can be obtained under the following conditions:a) Fresh steam pressure: 13.730.39MPa; Fresh steam and reheat steam temperature: 537b) Cooling water temperature does not exceed 35 and cooling water flow is not lower than the rated value.Heaters are put into operation as per relevant provisionsBack pressure rated value:9.0KPa2 While turbine is under rated operation conditions, the calculated heat rate is:8404KJ/kW.h(2007.3kcal/kW.h)This guaranteed value is subject to the following conditions:a) Fresh steam and reheat steam parameters are rated ones;b) Back pressure is not higher than the rated value;c) The heat recovery system is operating as per relevant provisions;d) Main feed water flow is equal to the main steam flow;e) Generator efficiency is not lower than 98.5%f) Feed water temperature satisfies the final feed water temperature value specified. Part of Steam Turbine Main Equipment

Turbine proper structure

: HP/IP cylinderThehigh-pressure cylinderdoublecylinder structureofthisunit, set thesandwichheatingsystem, the fourfront-endofthenozzlechamberat high pressurewithin thecylinder.Thenewsteamthroughthroughtheouter cylinderand4insertedinside thecylindernozzlechamberinlettube andnozzlechamberintothehigh pressurewithin thecylinder.Set upthefirst paragraph of theextractionafterhigh pressuresection7,the mouthoftheexhaust steamofparagraph 2 ofextraction,8,9the firsttwopartitionsarefixedon the 1stpartitionput,high and medium pressurewithin thecylindercarved facethrough-holebolt.Highpressurewithin theouter cylindersetinside and outside thecylinderis relativelydead,in order to reduce thethermal expansionofthecenterofthestator,highpressureoutside thecylinderundercatlikelevelcarved face,theoutercylinderofthesupport structuresupportingthe frontbearing housingand intermediatebearing boxtheouter cylinderaxial forceandthefirstbox,in theboxwithslidingbodiesandthecatlikecrosskeypass.Reheat steamby2hotreheat steampipeintothetwomedium-pressurecombinedsteam valve,fourof Steamtube into thepressure cylinder.Medium voltagelevel6,8andthe mouthoftheexhaust steamof3,4,5segmentextraction,pressure1, 2, 3Class divisionsinthemedium-pressurecylinder,4,5,6-levelclapboardsleeveis fixedon the 2ndpartition,7,8-levelpartitionis fixedon the 3rdpartitionputput onthe9,10-levelpartitionis fixedon the 4thpartition.

: LP cylinderBefore the low pressure outside the cylinder by the three paragraphs before, the composition of the rear are welded structure, low-pressure cylinder is divided into low-pressure outer cylinder and low pressure within the cylinder. Equipped with front and rear to prevent the cylinder over-temperature water spray protection devices. Cylinder bearing is under catlike centerline support to ensure that the unit operation the rotor and the cylinder centerline.Half of the low pressure outside the cylinder on top of the inlet parts of the expansion joint pipe connected with the inner cylinder inlet port and connectivity, to compensate for the inside and outside the cylinder differential expansion and to ensure the seal. At the top is equipped with a total aperture 500 valve 2, as the vacuum system of security measures. Suddenly interrupted when the condenser cooling water, the cylinder pressure gauge pressure to 0.118 ~ 0.137MPa large valve, 1mm thick asbestos rubber sheet rupture, so that the steam emptying, in order to protect the low-pressure cylinder, the last stage blades and the safety of the condenser.Half around the bearing plate under low pressure outside the cylinder on the rectangular arrangement of the base rack, under the weight of the entire low-voltage part of the bottom row of the vapor port of the size 4.4 6.5m, an area of 28.6 square meters of exhaust steam.Exhaust port and condenser can be a rigid connection, may also have the flexibility to connect. Rigid connections, the condenser by a spring supported on the basis of the normal operation of the condenser water weight from the low pressure outside the cylinder to bear. The test condenser irrigation water of about 490t test requirements must be added to the auxiliary support, does not allow this weight to be added to the low pressure on the outer cylinder. Adopt a flexible connection, the condenser weight and water weight are the basis to bear, not the role of low pressure on the outer cylinder, but the low pressure outside the cylinder and foundation shall be exposed to atmospheric pressure.

: BearingThe type and structure of the bearingsThis unit a total of five support bearing, including three steam turbine, two generators to shaft positioning and rotor axial force to bear, and the thrust bearing of an independent structure, located in the high pressure rotor back-end, see Figure 3 - 10-5.In order to minimize the high pressure rotor bearings at both ends of the span, the thrust bearing unit with an independent structure with a spherical bearing sets, and rely on the the spherical ability to ensure the thrust pad load evenly. Work thrust pad and positioning thrust pad 11. Are located on both sides of the front and rear of the rotor thrust plate, to bear the axial thrust, as the shaft relative dead.Unit during normal operation, the axial thrust backward, rated conditions is 45.8 kN, the maximum operating conditions up to 79.4 kN thrust in the rotor thrust disk back-end (motor side) tile to withstand. Special circumstances may arise instantaneous reverse thrust, watts by the positioning of thrust in the rotor thrust plate to the front end (machine cephalad) to bear..1 # 4 # Support for this unit bearings are spherical bearing sets elliptical bearing.The bearing housing and the base frameBearing one of the units and the main oil pump and hydraulic adjustment Security Ministry Set in the former bearing box, 2 bearings and thrust bearing mounted in the bearing box, 3 # and 4 # bearing mounted in the bearing box. After the bearings inside to accommodate the coupling and the rotor ring gear, the cover is installed on turning gear. Post-bearing box is also equipped with low power coupling casing injector cooling device, the coupling between the low power and rotor ring gear cover up, the external injection cooling, can be effective in preventing tooth ring blast fever causing the temperature of the bearing housing.All of the bearing housing are made of cast-welded construction. Before the box of the slider when using self-lubricating slider to reduce the sliding friction force. The first bearing housing is located in the front bearing housing base shelves, in the bearing housing is located in the bearing housing base rack, after bearing box is located in the bearing box shelf, low-pressure cylinder around the platen bearing 10 base rack

: RotorRotor: high pressure rotor, the low pressure rotor are the entire forging rotor. High and medium pressure rotor and a rigid coupling between the low pressure rotor connected to the use of semi-flexible coupling connection between the low-pressure rotor and generator rotor. High pressure rotor brittle transition temperature is 121 . Therefore, when the cold start is necessary to fully warm-up speed to the rated speed, the rotor center site must be heated to 121 .High pressure rotor structure of the whole forging material 30Cr1Mo1V, rotor length of 5940, the total weight of 14.9t (including leaves).Low pressure rotor whole forging rotor, materials 30Cr2Ni4MoV, and the total length of 4820mm, with a total weight (including weight of leaves) ~ 24t.

:Cylinder sliding pin systemCylinderslidepinsystem:thefirstboxwith aself-lubricatingslidercanimprovethe expansionofthecylinder.The absolutedead centeroftheunitislocatedin thebearing box.250mmthe locationofthemachinecephaladbiasinthe# 2bearing centerline.Rely onlow-pressure cylinderfront-endbeforethelow pressureinletcenterline2445mmatanotherrackinthelow-pressure cylinderon both sides ofthe base.Unit start-up,high pressurecylinder, frontbearing housingforwardexpansion ofthelow-pressure cylinderbackwardexpansion.High pressurewithin thecylinderis relativelydeadinthehighpressureinletcenterline390mmatlow pressurewithin thecylinderis relativelydeadinthelow-pressureinletcenterline.Fixed pointofthestator,the rotor(as opposed todead center)inthelow pressureinthe bearings inside thethrustbearingunitstartup,therotorfromhereforwardexpansion.

Turning gear deviceTheturning gearunitislocatedinthebearing housing,theturningspeedof 4.5rev / min.Theturning geardriveturbine generatorstartand stopthedriveshaftrotation.Theturning gearisinstalledbetweentheturbineand generatorbearingscoverits basicroleas follows:A.Turningtheunitshut down, so thattherotorcontinuous rotationto avoiddue tothecylindernatural coolingcausedcylindertemperature difference betweentherotorbending.Two.Thecrewrushedtoturnbeforeturningtherotor continuousrotation,to avoidthetemperature differencecausedbythevalvesteam leakageandsteamsealaspiratedrotorbending.At the same timecheckwhethertherotorbendingandmovementpart of thefrictionphenomenon.3.Theunit must beinthestateofturningRushes, otherwisetoo much frictionrotorin the stationary statehas beenrushedtoturnwillleadtobearingdamage.4.Continuousturningofa longer period of timecan eliminate thenon-permanentbendingoftheunitlong-termoutage,and storageorother causes.

Unit Operation Characteristics1 Startup ConditionsThe startup conditions of this unit are classified based on the inner wall metal temperature of the HP inner casing upper half after regulating stage.Cold startup: less than 150;Warm startup: 150300Hot startup: 300400;Very hot startup: 4002 Startup ModeThis unit is started through HIP casing.3 Operation Control ModeOperator manual mode (manual); operator auto mode (semi auto); turbine self-start mode (auto)4 Valve ManagementWhen the unit is under stable operation, nozzle regulation mode should be taken to minimize valve loss at throttling condition. During the load fluctuation and startup process, throttling regulation mode should be used to ensure full circumferential steam admission to shorten the startup time. This means that all valves will be simultaneously opened and closed.5 Unit OperationThe unit can operate through fixed pressure mode and fixed-sliding-fixed pressure mode.It is recommended to use fixed-sliding-fixed pressure operation mode during the peak-load regulating operation. Fixed pressure operation mode should be used when the unit is running at a load of higher than 90% THA,and lower than 30% THA,sliding pressure operation mode should be used when the unit is tunning at a load range of 90%~30% THA. This operation mode can improve the economic performance and when the unit is running at varied conditions, and can reduce the difference in temperature of the admission steam and reduce the temperature change during load changing. As a result, the low frequency hot fatigue damage of the unit can be reduced. 442-3-130.24mm 30.24mm44

2400mm3030 Control, Emergency governing and Turbine Electric Supervisory Protection System1#~4#This project adopts boiler, turbo generator and electricity central control1#~4#unit is set up one Central Control Room(CCR).DCSThe auxiliary workshop adopts DCS communication central monitoring mode.The control system can adapt to the requirement of minimum steady combustion load above to full load within the scope of regulation. It can be realized that boiler starts from ignition to unit with full load, turbine starts from raising speed up to unit with full load sub-group level automatic sequence control.

(DCS)(DAS)(MCS)(SCS)(BPC).DCS51DCS31CRTUCBPCVMIMICThe unit plant control adopts Distributed Control System (DCS). The scope of its coverage include Data Acquisition System (DAS), Modulating Control System (MCS), Sequence Control System (SCS), Bypass Control system (BPC),the unit plant DCS configures 5 operators stations and one engineer station altogether. DCS common system configures 3 operators stations and one engineer station. Cathode-ray Tube (CRT) and keyboard is main monitoring unit meansthe emergency trip hard wired button and I&C signal button for turbine ,boiler and generator are set up on the operating console in the centralized control room(CCR),on the UCB panel is equipped with I&C signal , electric contact drum water gauge, drum water level TV, furnace flame TV,PCV operation board and large-screen, the emergency magnetic blow-out switch and hard wired button for diesel generator emergency start up are set up on the MIMIC panel.

DCSGEDASSCSMCSFSSS,BPC,ECSDEH3DEHDCSDCSDCS control system including DASSCSMCSFSSS,BPC,ECS and so on will be provided by GE Xinhua company.The turbine Digital Electro-Hydraulic (DEH) control system with three control Cabinets will be provided by Dongfang turbine works. DEH and DCS use the same hardware and is a part of DCS system.(ETS)PLCSchneiderQUANTUM The turbine emergency trip system (ETS) will be provided by Dongfang turbine works, the redundant PLC with a control cabinet uses Schneider Corporation QUANTUM system.(TSI) eproMMS-6000The turbine Supervision Instrument (TSI) will be provided by Dongfang turbine works. It uses Epro Companys MMS-6000 system with one control cabinet.(DEH)DEHTurbine emergency governing system: LP emergency system, HP/LP interface unit, HP fire resistant oil system and turbine supervisory instrument. The emergency governing system is an actuating mechanism of HP fire resistant oil DEH system; it accepts instructions issued by DEH, complete , Actuate valve and shut off unit and so on.Bearing and Shafting Safety Monitoring1 Bearing Safety MonitoringSupporting bearings and thrust bearing pads are equipped with platinum resistance thermometer to measure the temperature of the Babbitt metal so that the bearings can work in a safe and reliable manner. During the operation, alarms will occur when the thrust bearing pad Babbitt temperature goes up to 100, and the unit will shut down when the temperature reaches 110. Since bearing damage is not necessarily on the Babbitt metal temperature measuring areas, monitoring the temperature of the return oil is also a means used to ensure the safe and reliable operation of the bearings. Supporting bearing end oil return tank and thrust bearing oil return ports are all installed with platinum resistance thermometers to measure the oil temperature. Drain oil pipes on various bearing housings are also provided with thermometers. The rising of return oil temperature means that the bearings are nor working properly and should be treated in a timely manner. When the temperature of the return oil is too high, it is apt to result in the aging of the oil. 2 Monitoring of the Bearing VibrationsBearing vibration is a comprehensive examination indicator to judge the dynamic balancing situation, installation quality and operation conditions for various rotors of the shaft line. Vertical vibration sensors are installed on the bearing housing covers for bearings 1# ~5# of the shaft line so as to monitor the vibrations of the shaft line.3 Monitoring of Shaft Vibrations1 vibration sensor will be installed at both left and right sides of bearings 1# ~ #5 (including generator) at the 45 angle from the horizontal surface so as to measure the relative vibration of the rotor against the shaft. With phase identification impulses being added, the locus of journal center can be viewed through an oscilloscope.4 Monitoring of Rotor DeflectionMP bearing housing cover is equipped with a mechanical rotor deflection indicator. It is used to monitor the deflections of various HIP rotor sections when turning the rotor. For a newly installed unit or a unit under major maintenance, rechecks of run-out values are to be conducted before closing of the casing so as to ensure that the deflection indicator readings are taken when rotor is not bent. Such readings are to be used as the initial valves. During the startup after a major maintenance or startups thereafter, the difference between the readings of the indicators taken prior to turbine running up and the initial values should be less than 0.03mm. If the deviation is too big, analyses must be conducted to identify the reasons and problems identified must be cleared. The unit is not allowed to run up before the deviation value is brought back to the normal situation. After the above work is completed, the screws on the indicator are to be lifted so that the measuring tip is placed away from the rotor surface.In addition to the deflection indicator on the MP bearing housing, there is also an electric highly sensitive eddy current sensor installed on the front bearing box, which is used to continuously measure the eccentricity of the rotors in a non-contact measuring manner. The output signals can be sent to the recorder and computer. When the eccentricity is 0.03mm higher than its initial value, an alarm signal will be sent out. 5 Monitoring of Axial DisplacementMP bearing housing is provided with 2 axial displacement sensors to measure the axial displacements of the shaft line. The output signals will be sent to the instrumentation display, recorders and computers in the central control room. In case the displacement exceeds the allowable range, alarming signals will be sent or an emergency shutdown will take place.When the thrust disc is in tight contact against the working thrust bearing pad, the displacement value is 0; when the shaft line moves towards the generator side, the displacement value is considered positive +; when the shaft line moves towards the turbine head, the displacement value is considered negative -When the axial displacement reaches + 0.6mm or 1.05mm, a light alarming signal will be sent; when the axial displacement reaches +1.2mm or 1.65mm, an emergency shut down should be performed with relevant incident records being taken.Prior to the startup of the unit, the axial displacement indicator should be set to push the rotor towards the generator end. When it is confirmed that the thrust disc is in contact with the working thrust bearing pad tightly, set the signal value to 0.Adjust the security systemThe regulation of security systems of the turbine can be divided into: low-voltage security systems, high and low voltage interface device, high pressure resistant oil system and turbine safety monitoring system. Adjust the security system is the executive body of the high-pressure fire-resistant oil digital electro-hydraulic control system (DEH), it accepts the directives issued by DEH, to complete the task of hanging gates, drive valve and interdiction unit.Steam valve actuator: the location of the steam valves are controlled by the respective executive body, its implementing agencies by the motivation of a hydraulic oil, its open to closed by spring force by the high voltage resistant oil-driven oil motive fuel tank and a control block connection, equipped with solenoid valves, unloading valves, servo valve, check valve control blockThe anti-fuel system: the anti-fuel system function is to provide the executive body of oil motive power source, by the anti-fuel pump oil, phosphate ester fire resistant oil as working fluid, the working oil pressure 14MPa.Emergency Trip System: a mechanical flying ring critical security features, a mechanical stop solenoid valve and a field manual release three to any action by mechanical interdiction agencies leverage so that the action of the mechanical shut-off valve, vent to high pressure security of oil and the unit shut down. Addition of four high-voltage interrupter solenoid valve, composed of series and parallel, high-voltage the interdiction electromagnetic valve lost power direct vent to the high pressure safety oil and the unit shut down, in order to improve the reliability of the automatic shutdown. Controland securitysystemsControlsystem (DEH)DEHOverview:Theunit consists oftwohigh-pressuremain steam valve,fourhigh-pressureregulating valvetocontrolthehigh pressureinlet,twomedium pressuremain steam valve,twoin thepressureregulatingvalve controlpressureinlet.Describedsixinletvalvetothehydraulic actuatorto driveto meettheshortoperating timeandhigh precision positioningrequirements.Theworkoftheturbinerotational speed3000r/min,whentheloadchangesinthegrid, causingtheturbinespeedchangesalong withthe gunpartoftheSteam

TurbineSystemmeasuredtheactualspeedoftheturbine,andtherated speed3000r/mincomparedspeed changestomaintainthespeednegative feedbackfrequencydifferentialamplification,adjusttheservocontroland other aspects ofcontrol of highpressure regulatorvalveCV,the ICVopening, formingwithinthepredefined range.Areusing high pressureturbine10inlet valvefuelanti-motivedrivenrefrigerantoil,in addition tosixofthecontrol valveCV,ICVcontinuous control oftheservovalveandtheDEHcomputer interface,theremainingtwoin thepressureofmain steam valveRSVtwocontrolandtwohigh-pressuremain steam valveMSVsolenoid valvewithDEHinterface.In order to ensurethesafe operationoftheturbinein the hydraulic systemcomeswithseveral sets ofredundantProtection Department:Emergency tripdevice andthetestelectromagneticvalveHigh and low pressureinterdictionsolenoid valveSpeedinglimittheelectromagneticvalveturbine latching auto adjusting servo system static relation valve on-line adjusting Control before startupAuto judging hot state Select start-up modeSpeed control Raising speed: setting target, setting raising speed rate, and auto passing throughCritical speed3000/min constant speedLoad controlGrid connection with initial load Generator pseudo grid connection testRaising load: setting target, setting load rate Constant pressure sliding pressureconstant pressure raising load Main steam pressure controlLoad controlPrimary frequency modulationCCS controlHigh load limitationLow load limitationValve position limitationMain steam pressure limitation RunbackSwitching over single valve & sequence valveOver-speed protection (103%)Load rejectionOver-speed protection (110%)On-line testSpray oil test Over-speed test: (electric test, mechanical test)Valve movement testHP emergency tripping solenoid valve testATC controlOperator manual controlDEH-V 1) turbine latching

Emergency Trip System by resetting the crisis to establish the safety of pressure and open the main valve, and prepare the crew rushed to turn.2) different according to the unit using high-pressure cylinder to start, through intermediate pressure cylinder, high / medium pressure cylinder jointly launched;DEH-V and the bypass system to match, using different inlet unit to start. General domestic unit using the high / medium pressure cylinder start3) ATC since the launch of / experience curve start / operator automatically;DEH-V provides three kinds of means to achieve the unit start-up:ATC since the startThis way, the DEH-acquisition turbine steam temperature and metal temperature and stress calculation unit rotor and cylinder, and in accordance with the current operating status of the unit, and automatically generate the target and l rate, the unit brought to rated speed . Grid, ATC automatically fix l loading rate. Start and variable load, the stress of the rotor or cylinder margin target is automatically change or amend the rate of l / l loading rate to ensure that the unit stress within the allowable range.

The experience curve to start this way according to the first level of the steam turbine metal temperature to determine the unit is cold, warm, hot, very hot state, according to the turbine operating procedures and operational experience to choose a different l rate, and automatically generate the target warmcomputer time, the unit brought to rated speed. After the grid automatically transferred to the automatic mode of the operator.Operator automatically in this way, by the operator to set the target speed, target load, rate of l and l load rate.4) automatically increases the speed control;DEH to control the speed of the unit according to the speed setpoint and actual speed deviation in accordance with the PID law. The actual speed of the turbine shaft speed measurement probe installed after the "2 out of 3 vote, the speed for a given value depending on the startup mode, respectively, calculated by the ATC stress, experience curve, or gives the operator.5) Thefrictionchecks;Unit start-upprocessinorder to ensure theunitis operating normallyat low speeds, check theturbinerotationand monitoringinstrumentation systemis working properly.DEHdesignedfrictionchecking,via buttons, DEHautomaticallyunitimpulseto 500~600rpm,stayfive minuteslater,turn off automaticallytoadjustthevalveto runto checkunitoperationsituation.6) Automaticfasttoocritical;Flexiblerotor(rotorcritical speedbelowthenormaloperating speed)of DEHautomaticdetectionspeedis inthe critical rangeoftheshaft,once thespeedto enterthecritical sectionof DEHautomatically disables theunittostayin the region,andpre-sethighratepassedtopreventexcessivevibrationunitto ensurecrew safety.7) Warmvalve/warm-up;In order to preventtheturbinerotor stressis too large, DEHprecise controlunitwarm-upatthe specifiedspeed.DEH systemwithATCstress calculation, but alsoto calculate theexpectedwarm-up time.Someunitsalsoconsiderpre-warmthe main steamvalve housing,theDEHcontrolside of themain steamvalveto openabout10%to20%,throughthesteamwarmvalve, complete,close themain steam valve,readytoRushes.

8)valve leak test;DEHprovidedthemain steam valveand adjust thetightness testofthevalvefunction.Tightness testofthemain steam valve, DEHclosealltheregulatingvalve, openall themain steam valve;adjustavalvetightness test, DEHturn off allmain steam valve,openalltheregulatingvalve.Tightness testoftime and speedrecordsinthetrialat the same time,thecalculation ofthecurrentconditionsof therigorindicatorsto determinetheeligibilityofrigor.9)automatic synchronizationcontrol;DEHdevice interfacestothesame period,toaccepttheinstructionsofthesynchronization deviceautomatically adjusts theunitspeed,compatiblewiththegrid frequencyto provide a guaranteefor the smoothgrid.10)withearlyloadautomaticallyAftertheunitandthenetwork, DEHwillbebased on the currentunitparameter,correctloadtargetautomaticallywiththe beginning ofthe loadto preventreverse poweroperation.11) electric overspeed protection test, mechanical overspeed protection test;Unit grid, and warm-up for some time, splitting the overspeed protection test.DEH control, were 103%, 107%, 110%, and mechanical emergency trip overspeed test.DEH, according to the different types of test, design appropriate control strategies.12) the load limit;DEH in the design of high load, low limiter.13) at constant pressure and sliding pressure operation;Grid of DEH on the unit's load regulation at constant pressure and sliding pressure in two ways, the constant pressure mode, the DEH Control regulator valve to adjust the power.Sliding pressure mode, the DEH Control to adjust the valve remains in a position to adjust the steam pressure from the boiler to control the unit load; to improve the efficiency of the unit in the sliding pressure mode, DEH also designed the valve fully open the "Runmode, when the turbine valves are throttling losses14) automatically adjusts the unit electrical load;DEH can load open and closed loop control.Open-loop control, DEH only control the valve opening, power generating units is determined by the steam parameters.The closed-loop control, DEH were power control loop or control stage pressure loop to adjust the unit power.Since the control stage pressure reflects the faster, for applications that require load fast response situations.The power circuit is slower, but you can achieve precise adjustment of the power.Extraction Steam Turbine input thermal power decoupling control, then the "hot" power set.

15) automatically adjusts the unit heat load;Extraction Steam Turbine, DEH provides a closed loop adjustment of the heating load according to the extraction pressure, extraction control loop.If you do not put thermoelectric decoupling control, then given power "means" to heat.16) main steam pressure control and restrictions;To help the boiler control system to maintain the stability of the vapor pressure of DEH design main steam pressure control, turbine throttle pressure is controlled at the set point.At this point, power generating units for the open-loop control.If the machine before the pressure drops to a set point, the DEH Main Steam Pressure limiter will turn off the small regulating valve to maintain the stable operation of the boiler until it reaches the pressure to return to the main steam pressure limiter set point, or tothe lower limit of the pre-set valve.The main steam pressure control and limit functions were selected input.Main steam pressure controller set point and the main steam pressure limiter setpoint can also be provided by the boiler control system.17) heat load / power load decoupling adjustment;Extraction Steam Turbine Extraction Steam load and electric load is to influence each other. DEH provides the extraction of heat load and electrical load decoupling control loop can be achieved within the allowable range of the unit operating conditions, the heat load and electric load adjusted independently without affecting each other. Decoupled manner according to the different needs and specific units, one-way or two-way decoupling control.18) valve management;DEH provides two regulating valve operation modes: a single valve and sequence valve. Single valve means to simultaneously open all the regulating valve, the orderValverefers tothesuccessiveopenofeachregulatingvalve.Thestartupoftheunit,usinga singlevalve,allowsthenozzlegroupthe weekinlet,uniform heatingunittechnology componentstoreducethethermal stress;unitgrid,thesequence valve,can makemore than oneregulatorvalveis only onevalvein a throttledstate,helps to reducethrottling losses,improve unitthermal efficiency.DEHprovidestwovalveoperation modeswitchingprocedures.19)valveeventexperience;Inordertopreventthevalvejam, DEHcontrolvalvefull strokevalve testing.,Dependingontheunitforms ofthedesignof the whole tripandpartial stroketest,taking into accountthejointbetweenthevalveopenthelift forceandtheleft and right sideof themutuallocking.

20) in low vacuum protection and limitations;The vacuum is too low will result in the final stage steam turbine blade overheating and damage of DEH, when the vacuum is decreased according to the requirements of the unit, DEH restricted units contribute to the protection of low-pressure cylinder last stage blades.21) participate in the grid once FM and secondary FM;When the grid frequency changes, DEH automatically adjust the unit output frequency deviation from the compensation network load caused by the change.The one hand, DEH, depending on the size of the units ranging from rate, in proportion to adjust the valve opening, while the adjustable frequency dead zone and load under the limit, that is the first FM; the other hand, DEH can accept CCS systemremote load to adjust instruction, and participate in the grid secondary FM.For the case of isolated operation unit, or the power grid caused by the accident to the machine to the electricity grid disengage, DEH In addition to the primary frequency regulation, when the frequency of more than more than the rated frequency of 0.5Hz, DEH automatically into the secondary FM DEH itself frequency regulatorto maintain frequency stability22) in conjunction with CCS systems to achieve machine furnace coordination, the AGC power generation;DEH can accept the remote control command signals of the CCS control system, under normal circumstances, the use of the Pulse interface.DEH to provide load reference volume and FM amount to the CCS system, as a compensation for feedback and power instructions.

23) Rapid Load RUNBACKThe case of unit auxiliary fault, DEH can with the boiler to quickly reduce fixed power, the turbine steam consumption and boiler steam production to adapt to.There are two ways of RUNBACK way, one is open-loop control in the event of RUNBACK DEH removal of CCS remote control, removal of the DEH power control circuit of DEH in accordance with the pre-set rate, direct load shedding given value to the RUNBACK the corresponding loadThe lower limit so far.Another method is to RUNBACK occur CCS control without excision of the CCS control rate is accelerated by the DEH, the CCS under the control of fast load shedding.24) Fast load shedding the FCB;When the generator outlet side fails to DEH quickly reduce output.The unit may become islanded operation with regional LAN or Daichang electricity, frequency instability.The main task of the DEH power conditioner into a large network operation to stabilize the frequency.This DEH-V system, specifically designed to power - load unbalance (PLU), and quadratic FM functions, OPC overspeed protection value and and network increased by 103% to 107%.Occur FCB If the output of the turbine generator load> 60%, or speed up over 107%, the PLU action to close the regulating valve.Frequency fluctuations above the rated frequency of 0.5Hz, DEH is automatically put into the secondary FM.25) the overspeed protection control the OPC;103% 110% overspeed protection control, the setpoint can be set according to the specific unit.26) Load rejection predict the LDA;Higher unit load, the occurrence of the generator outlet switch is disconnected, the DEH judgment unit is bound to excessive speeding, for which the unit speed has not reached the OPC value (103%) before they are quickly shut down in advance to adjust valve, effectively preventing the unit speeding, and greatly improve the speed of the dynamic process of adjustment.27) control the power imbalance in the PLU;Main unit of electrical failure, output and load imbalance will cause the unit speed soaring. This is also a preventive measure, the stability of the grid frequency, and to protect the safety of the grid.28) Hand / automatic bumpless switching.DEH design manual and automatic control mode are two ways to track each other, bumpless switching.

DEH-V

DEHV(2) security systems(a) Emergency Trip System ETSETS, namely the turbine emergency trip system. When the failure of the turbine and generator tripping, boiler fuel trip, automatically activate the shutdown circuit to quickly close the inlet valve (the main steam valve, regulating valve). The ETS by two kinds of way of the mechanical - hydraulic, electrical - hydraulic composition. Fault detection can be mechanical, electrical, two kinds of ways, but the closure of the inlet valve final total depends on the hydraulic pressure to adjust the security system.(b) mechanical - hydraulic emergency tripEmergency Trip to the mechanical overspeed fault detector. When the turbine speed n 3300r/min under the centrifugal force, a ring of flying out of the emergency trip device out the gate. Emergency trip device affects the interdiction isolation valve block in the shut-off valve commutation, removal of high-pressure safety oil; a one-way valve will allow speeding limit safe oil pressure relief so that the turbine high pressure safety oil pressure reliefpressure main steam hydraulic control on the unloading valve, valve and regulating valve oil motivation disappears, the unloading valve is open, so that the steam valve oil incentive to quickly shut down. Main steam valve is fully closed will be given a limit switch signals, electrical control circuit of each check valve to close.(c) electrical - hydraulic emergency tripElectrical way to detect the failure of the various fault and tripping of generators, boilers, main fuel trip of the turbine, then electrical obstruction signal simultaneously to mechanical interdiction electromagnet (3YV), interdiction high-pressure solenoid valve (5 ~ 8YV) as well as steam valve oil motive interdiction solenoid valve (9 ~ 14YV; 15 ~ 18YV) on. Electricalmonitoring systemAnoverviewoftheelectricalmonitoring systemTurbine Generator Shaft Systemsneedcontinuous monitoring ofthe parameters:speed,zerospeed,speeding,Hydroforming,differential expansion ofmedium voltage,low voltagedifferential expansion,axial displacement,high pressurecylinderof thermal expansion,theeccentricshaft vibration,tilevibrationandturbineemergency triphitsonhit aspeed.Speed MonitoringSpeed iszero speedSpeed sensor10,TSIspeedandzerospeed-a,corresponding to the0~5000r/minspeedmeasurement range,4 ~ 20mADCsignal outputofthemonitoring instrumentsent tothe DAS.Zerospeedrelaycontact signaloutputwhenthespeed fromhigh-speedreduced to2r/min, asTurbineautomaticallyturningthe start signal.Taketwooverspeed protectionElectricaloverspeed protectionusingthreesensors, when therotating speedn3300r/minandmeetthreeto taketwologicalrequirements, speedingtheprotectionoftheoutputrelay contactsafterETSlogic processing,interdictionturbine.Displacement monitoringHigh pressuredifferential expansionAsensormonitor4 ~ 20mADC output;whenthehigh pressuredifferential expansion of 6mmor3mm-alarmrelayoutput alarm signal.Whenthehigh pressuredifferential expansion of6.2mmor-3.2mm,thehazardrelayoutputcontact signal.

Lowpressuredifferential expansionUsingasensor,monitor4 ~ 20mADC output;low-voltagedifferential expansion of7mmor-6mm,monitoralarmrelayoutputalarm signal.Whenthelow-voltagedifferential expansion of7.2mmor6.2mm-monitorthe risk oftherelayoutputcontact signal.Axial displacementAxial displacementmonitoringusingtwosensors,corresponding to the-2to+2 mmaxial displacement ofthemeasuring range,4 ~ 20mADC outputmonitor.Whentheaxial displacementvalues0.6mmor1.05mm-alarmrelayoutputalarm signal;whentwoaxial displacement of1.2mmor1.65mm-hazardrelayoutputcontact signaltoETS,interdictionturbine.Eccentricity andPhaseTheeccentricphasemeasurementusingasensor, corresponding to0~100 meccentricitymeasurement range,themonitoralarmrelayoutput alarm signal. High-pressure cylinderofthermal expansionBoth sides of theturbinehigh-pressure cylinder,acylinderlocatedexpansion ofmonitoringchannel,used to monitortheexpansionofthetwo-cylinderbasis.High pressureandmedium pressurecylinderexpansionmonitoringusingtwo35mmabsoluteexpansionsensorandtwosupportingthe absoluteexpansion ofthemonitor.Correspondinghighpressure, medium pressurecylinderexpansionat0~35mmmeasuring range,thetwomonitorseach ofthe4 ~ 20mADCsignal output;when theexpansionexceeds a setvalue,value,twomonitors,each withtwowarningfollowingelectricalaction,outputalarm signal.VibrationShaft vibrationMonitoring of the rotor relative to the radial bearing vibration, the unit 1 # 5 # support bearing has the horizontal (X direction), vertical (Y to) two-axis vibration monitoring channels, a total of 10 channels. 10 eddy current sensor, corresponding to the shaft vibration measuring range of 0 ~ 400m, each channel of the monitor are 4 ~ 20mA DC signal output; any channel axis vibration 0.127mm, corresponding monitor channel only warning relay output alarm signal; any channel axis vibration 0.25mm, the risk of the corresponding monitor channel relay output hazard warning signal.Tile vibrationTile vibration monitoring channels in order to monitor the absolute vibration of the bearing relative to free space, unit # 5 # Bearings has a vertical direction, a total of five channels. 5 speed sensor. Tile vibration measurement range corresponds to 0 ~ 150m, each channel of the monitor are 4 ~ 20mA DC signal output; any channel of the tile vibration 50m, corresponding monitor channel is only a warning relay output alarm signal; any channel of the tile vibration 80m, the risk of the corresponding monitor channel relay output hazard warning signal.Head speed of TableHead speed monitoring using a domestic CS-1 magnetic pickups and a domestic WZ-3 intelligent transient digital display tachometer. The table has two speed alarm, zero-speed alarm, fast display speed, maximum speed storage and reproduction, self-test and calibration functions. Two overspeed and zero speed alarm are relay contact output.Turbine and auxiliary equipment interlocking protectionTurbineTripProtection:Amanualrelease:According toneed,placethemanualreleasehandleL30 leftself-lockingposition, thehand"manualrelease",so thattheactionofthemechanicalshut-off valvetoventoff thepressure safetyoil (HPT),quicklyturn off the mainvalveand adjust thevalvetostop.2overspeedtrip device:Whentheturbine speedtoreach the rated speedof110%to112%(3300~3360r/min),theemergency tripflyingringattack,combatemergency tripdevicesupporthooktoholdthehookrelease,so thattheactionofmechanicalshut-off valveto ventto gohigh pressuresafetyoil (HPT),toquicklyturn off the mainvalveandregulatingvalveshutdown.

(3) the unit the following exceptions to the following setting value, the mechanical shutdown solenoid valve (3YV), high-voltage interrupter solenoid valve (5YV, 6YV, 7YV, 8YV) and the oil motive interdiction solenoid valve action, vent to the high pressure safety oilquickly turn off the main valve and adjust the valve to stop:

TSI3300 r/minDEH3300 r/min+1.2mm/-1.65mm+6.2mm/-3.2mm+7.2mm/-6.2mm19.7kPa1200.0392MPa7.8 MPa7.8 MPa#1~475#1~4115#1#6110#1~#50.08mm#1~#50.25mmDEHMFT 1PS6PS7PS87.8MPaEH2PS911.2MPaEH3PS10PS1111.2MPaEH4EHPT1021MPa420mA5140.5MPa9PS47PS4.8 MPa10PS5 9.6 MPa11PS1PS2PS37.8 MPaHPT12EH170.2MPa13EH0.50.1MPaEH0.60.1MPa14EH10.00.2MPa15EH0.2MPa16EH0.35MPa170.35MPa180.138MPa190.35MPa200.35MPaEH(4)console"emergency stop" buttonNeededin theconsole,press thetwo "stop"button, mechanicalstopsolenoid valve(3YV),high-voltageinterruptersolenoid valve(5YV, 6YV, 7YV, 8YV)and theoilmotiveinterdictionsolenoid valveaction,vent tothehigh pressuresecurityof oil,toquicklyturn off the mainvalveandadjustthevalvetoshut down.

(5)lateralprotectionMachinejumpfurnaceprotection:at leastthere isahigh-pressurevalveandapressuremain steam valveatthesametimeClosethevalve leak testinstructions, DEHissuedaturbine tripcommandtotriggertheboilerthe MFT.Machinejumppowerprotection:at leastthere isahigh-pressurevalveandapressuremain steam valveatthesametimeClosethevalve leak testinstructions, DEHissuedtheinstructionofturbine trip,jumpgenerator.

Auxiliary interlock protectionOPC protectionGenerator oil switch trip and the pressure cylinder exhaust steam pressure is greater than 15% of the rated pressure (load 15% rated load), speed limit electromagnetic valve and interdiction solenoid valve regulating valve oil motive action at the same time, drain off the speeding limit oil (OPC), each regulating valve in the valve manipulation of the role of the spring force in steam pressure to quickly turn off until after the reset period (2s), the solenoid valves, and then re-open the regulating valve to maintain the turbine 3000r / min.Speed up to 103% rated speed, speeding limit solenoid valve and regulating valve oil motive interdiction solenoid valve simultaneously, to vent out the speeding limit oil (OPC), each regulating valve manipulation in the valve seat spring force and vapor pressure quick closing speed to 3090r/min, the solenoid valve is reset, and then re-open each regulating valve to maintain the turbine 3000r/min.When the turbine speed up the acceleration is greater than 5r/min, speeding limit electromagnetic valve and the regulator valve oil motive interdiction solenoid valve action, at the same time to vent out the speeding limit oil (OPC), each regulating valve in the valve manipulation quickly turn off the seat spring force and the role of the vapor pressure to be speed up when the acceleration is less than 5r/min solenoid valves, and then re-open each regulating valve to maintain the turbine 3000r/min Lesson four -- Lube oil systemThe roleofthelubricating oil systemLubeoilsystemfunctionTo providelubricanttothe bearingoftheunitandtothesecurity systemto providepressureoil,oil supplyand alsotothebarring gearandjackingdevice.Coolingunitbearing.

Introduction of equipment:This system uses the traditional steam turbine rotor to directly drive main oil pump------oil injector system, the primary pressure oil of the emergency system will be provided by oil injector, the oil used for bearing is also supplied by oil injector and but the oil injection power oil is provided by main oil pump.The main pump oil leading to a shot of oil. Shoot oil has two, an oil lubrication system, an imported oil to the main oil pump.The main oil pump leaves oil to oil injector. There are two oil injectors. One supplies oil for Lube oil system, the other supplies oil for inlet of main oil pump.Theoil systemoftheunitassembledtank.Thetopoftheassembledtankis equipped withanAC lube oil pump,aDC emergencyoil pumpandtwoexhaust fan.

The oil system of this unit uses the packaging fuel tank. One AC Lube oil pump, one DC emergency oil pump and two oil fume exhaust fans is equipped on the top of tank

Jackingoil pumpusingtwopiston pump, a computer runningastandThe jacking oil pump uses two displacement pumps, one is in operation and the other is standby.

Two100%capacityoil cooler(onerun,one spare)Two 100% capacity oil coolers (one is in operation and the other is standby).

flow process ( attached system drawing)

Oil purification equipment:UseQYJB type oil purification equipment mainly used for purification or clarification of the steam turbine, gas turbine and hydropower mineral oil lubricants. Play the role of lubrication, cooling, surface protection, sealing, lubricating oil on the turbine in the turbine. Any kind of failure, these features of the lubricant will cause the cost of power generation increased or reduced efficiency, even lead to turbine downtime. Therefore, we must ensure that the quality of lubricating oil in the run.The main factors affecting the quality of lubricating oil is produced in the steam turbine is running dirt. Turbine lube oil system is a closed loop system, the main pollutants in the lubricating oil from the system itself. Due to changes in temperature, the condensed water in the lubricating oil system or fuel tank, through the bearing into the system water vapor, the bearings or the oil cooler leak caused the water to oil pollution, which is the main pollution factors. Metal wear or erosion in the operation of the system to produce small particles formed solid impurities contaminants. Of course, outside the system of impurities, like dust in the air, dirt also through the bearing into the system. Causing lubricants pollution. In the lubricating oil system of the washing solution or emulsion, their lubricants: oil emulsion, accelerated corrosion, reduce the stability of the oil consumption of the additives reduce the lubrication value.Pollutants of solid impurities in the lubricating oil system: reducing the stability of the oil.

Twomain componentsand their functionsQYJBoilpurificationdevice mainly consists ofthe inlet valve,strainer,coalescenceseparatorinto theoil pump,oil drain pump, heater, vacuumseparation tank,condenser, vacuum pump,supply pump, fine filter,sampling valve, the oil valveoil return valves, water tanks,one-wayvalve,thesolenoid valveinsitumeasurementcontrol equipmentand automatic controlboxes and othercomponents.Themain components functionas follows:Strainer:toprotect the pumpwill not bedamagedbylargeparticles of impurities,reducethefailure rateofthedevice;Coalescenceseparator:separatorcoalescencecoalescingfilterismadebytheappropriatecombination ofspecially treatedglassfiber and composite materials, withgood hydrophilicity.Filteroutmechanical impurities,andthedual roleofthecoalescenceof water.The innermosthigh-precisionfilterfirstto filter outmechanical impuritiesintheoildemulsificationcoalescenceoftheoutsidelayeroftinywater dropletsintheoilgathertoformlarge drops.Largerdrops of waterwilldependonthe weight of theirsettlementtotheset ofsink.Smallerdrops of waterwas too latesettlement oftheoilfolderwiththe flow ofseparationfilter.Separation filtermadebythespecial treatmentofthecompositehas a goodwater repellency.Whentheoilflowingthroughtheseparation filterfrom the outsideinward,thesmall dropletsare effectivelyblockedoutofthe filterso that onlytheoilthrough,letthe water through,so as to furtherseparatethewater.Heater:Whenthedevicein a vacuumseparation,iftheoiltemperaturelower than00C,starttheheater,automaticthermostat,controltheoiltemperatureis not higher than600C.Used to reducetheviscosityoftheoilto facilitatetheseparationofwater.Intotheoil pump,oil drain pump:used for the transmissionfluid.

Main parts and functionQYJB type oil purifier device compose of filling valve, coarse filter, coalescing separator, feed oil pump, oil drain pump, heater, vacuum separate tank, condenser, vacuum pump, supply liquid pump, fine filter, sample valve, delivery valve, return oil valve, water tank, check valve, magnet valve in-place measure control equipment and automatic control cabinet and so on. Function of main parts as follows:Coarse filter: protect oil pump avoiding big grain impurity, reduce malfunction rate of device.coalescing separator: coalescing filter element in coalescing separator is made of special treatment glass fibre and its composite material after appropriate combination possess good hydrophilicity. Filter mechanical impurity and coalesce moisture. Innermost layers high precision filter material firstly filter mechanical impurity in oil liquid, outside demulsification coalescence layer coalesce tiny bead into big bead. Bigger size bead will subside to water channel by gravity. Smaller size bead will flow to separate filter element with oil liquid.Separate element is made of composite material after special treatment, possess good water resistance. When oil liquid through separate element from outside, small bead be cut effectively outside the filter element, only oil liquid can pass, water can not pass it, separate bead further.Heater: when equipment under vacuum separate mode, if oil liquid temperature lower than 00C, start heater, through automatic constant temperature controller, control oil temperature not higher than 600C. reduce oil viscosity, convenient for bead separation. feed oil pump, oil drain pump: transport oil liquid.Pressure meter: display fine filter pressure, when pressure more than 0.5Mpa, its a terrible clogging, wash the filter element. At this moment, close oil drain pump, Exhaust heater, fine filter, pre-filters oil liquid, take out inner filter element, wash it and install again.pressure differential controller: display pressure difference endured by coalescing separator inner filter element , when it reach to 0.1Mpa, alarm and stop. At this moment, take out coalescence filter element (coalescence filter element is white), install new coalescence filter element. Take out separation filter element (dark-green one), wipe external surface by clean and soft cloth, clean it and install again.electrical contact pressure meter: when pressure exceed 0.3Mpa, its a terrible clogging, take out and clean it or change it.QYJB type oil purifier device have two modes of separation: vacuum separation mode and coalescence separation mode. Separation mode different from steamer oil under different state. 1. vacuum separation mode when steamer needs to add new oil or steamer unit launch into use newly, please adopt vacuum separation mode(see working element drawing). At this moment, filling valve, coarse filter, heater, magnet valve, vacuum separate tank, condenser, vacuum pump, oil drain pump, check valve, fine filter, delivery valve work.2.coalescence separation modeafter a period of vacuum separation mode operation, test oil sample from sampling valve, when oil samples test result satisfy steamer s operation requirement, stop vacuum separation mode operation. Use coalescence separation mode operation. At this moment, filling valve, coarse filter, magnet valve, feed oil pump, coalescing separator, drain valve, check valve, fine filter, delivery valve work. When equipment online operation, please use coalescence separation mode.

Oil purification equipment for electrically operated HelpThe control system is divided into three parts:Coalescence of the separation systemStaff to open a total inlet valve and outlet valve.Into the pump and into the oil solenoid valve controlled by the PLC.The control counter-board oil switch open, the start and at the same time into the oil pump into the oil work, start and stop switch to stop the system continues to workVacuum separation systemThe system consists of vacuum pumps, vacuum into the oil solenoid valve, the oil drain pump and the vacuum system.PLC automatic control by the control counter-board vacuum switch and stop switch.Staff to open a total inlet valve and outlet valve.Start the vacuum switch, first open the vacuum pump, vacuum (into, out of the oil solenoid valve to open) by the delay of 20 seconds or so, the degree of vacuum is gradually increased to 0.08MPa, the vacuum into the oil solenoid valve to open into the oil through the heaterwithin the vacuum tank, when the oil level reaches the position of the Lower central hole (about 1 minute), automatic start oil drain pump oil discharge.System into the normal vacuum oil filter state, if the stop switch on the rotating panel to stop the vacuum system.Note: When the vacuum system will not start oil subsystems.Subsystems work in the oil is to start no vacuum system and manual oil return system.(The vacuum system and oil subsystems with each other since the lock).Oil return systemThe system is essentially the difference between the vacuum system design, want equipment within oil subsystems or vacuum system failure need to overhaul oil emptying all, you can start the oil return system operation.Panel to manually back to the oil switch to open the oil return system automatically, open the vacuum pump outlet valve open, about 1 minute delay to start the oil drain pump and the oil return solenoid valve is open at the same time, is worth noting that the oil solenoid valve and vacuuminto the oil solenoid valve does not open.Oil in the vacuum tank row of endless, you can manually start the oil drain pump oil dischargeCoarse and fine filter clogging alarm differentialCoalescing separation and vacuum separation system can automatically stop the alarm.Open the coarse and fine filter, remove the filter cartridge, re-fitted after cleaning in kerosene.Oil purification is complete, shut down, release the water in the lower part of the coalescence separation.Special Note!When the front of the device is running, open the oil valve.The device for the automatic control mode, the user simply can operate on electrical operation.

there are 3 parts of this control system coalescence separation systemoperator open chief filling valve and delivery valve. Feed oil pump and filling oil magnet valve controlled by PLC. Open oil content valve on control cabinet panel, start feed oil pump at same time.vacuum separation systemthis system compose of vacuum pump, vacuum feeding oil magnet valve, oil drain pump and vacuum system. Automatically controlled by vacuum switch and stop switch on control cabinet panel through PLC. operator open chief filling valve and delivery valve. Start vacuum switch, firstly, system open vacuum pump, pump vacuum(in and out oil magnet valve open at the same time), after 20 seconds, vacuum degrade rise to around 0.08Mpa, then vacuum filling oil magnet valve open and enter oil, through heater enter into vacuum tank, when oil level arrive at middle position of lower sight hole(about 1 minute), oil drain pump start automatically. System enter into normal vacuum filter oil state, if rotate stop switch on panel, vacuum system can stop working.Notice: when vacuum system is working, oil content system can not be start. When oil content system is working, vacuum system and manually return oil system can not be start (vacuum system and oil content system are interlocked) return oil systemthe design differences between this system and vacuum system are: when oil content system or vacuum system appear malfunction, discharge the oil in equipment totally, then can start return oil system. Delivery valve open, open manual return oil switch on panel, return oil system will work automatically, open vacuum pump, after 1 minute, start oil drain pump, return oil magnet valve open at the same time, notice: oil content magnet valve and vacuum filling oil magnet not open. If oil in vacuum tank can not be discharge totally, please start oil drain pump manually.coarse and fine filter clogging differential pressure alarmafter this alarm, coalescence separation and vacuum separation system stop working automatically. Open coarse and fine filter, take out filter element, wash it in coal oil and install again.after complete oil purification, stop this machine, discharge water at the bottom of coalescing separator.special notice: before operation, do open delivery valve.This device is full automatic control mode, please according to electric operation instruction Lesson five Main Reheated Steam and Bypass System Steam flow:

Thenewsteamthroughthehighpressuremain steamvalvearranged intheuniton both sides ofthehigh pressure mainsteam pipe,inletpipe, into thehigh pressure cylinder.Thehigh-pressurepart of thereflux,andthepressurepart of theheadarrangement,share ahigh pressureoutside the cylinder,high-pressureexhaust steamre-heatbyarrangementinthepressureoftheunitson both sides ofthe jointsteam valveintothepressure cylinder.Medium-pressureexhaustconnecting pipeintothelow-pressure cylinderCentralbytwo,and move forwardafter the shunt,before the passage oftherearcylinderintothecondenser.Theunithasavariable loadandpeakingability to run,the compositetransformeroperating mode.The unithas70%oftherated capacity oftwoseriesbypass systemused to coordinatetheboilerto producean imbalance betweentheamount of steamturbineand steam consumption,toimprovetheunit startupand loadadaptability,able to adapttheunitconstant pressureandthetransformerto runthe two conditions.Whenthegridafter the accident,Daichangelectricitytokeep running.Thelow sidein thecondenser throathasthreeDesuperheating.By warm waterto adjustthe doornext tothelevel ofboththehydrauliccontrol.

Valves and pipingA high pressure main steam valveThis machine has two high-pressure main steam control valve, arranged on both sides of the turbine. Each high-pressure main steam valve consists of a main steam valve and two valve, control valve and the main steam valve in the valve shell triangle shape, compact structure. The left side of unit 1 #, 4 # valve, the right side for 2 #, 3 # valve. The main steam valve with the diameter of 170 1 # 2 # valve with a diameter of 120, 3 #, 4 # adjust the valves meet the diameter of 100. In order to reduce the valve lifting force, the main steam valve and control valve with pre-Kai valve. The four control valve to control the high pressure within the tank corresponding to the four nozzles, control valve is controlled by the independent oil motive.The main steam valve at the inlet is equipped with a temperature galvanic, in order to monitor the temperature difference between the valve housing, reducing the thermal stress. The main steam valve stem has a conical sealing surface, the main steam valve is fully open, the stem cone close to the sleeve sealing surface to prevent stem leakage steam.The main steam valve equipped with a temporary filter (breakdown) and power plant during the trial operation period, the end of the trial run, put on a permanent filter (coarse mesh).Buckling combined with steam valve 2Have about the two buckling combined with steam valve, respectively, placed pressure on both sides of the part of the high and medium pressure cylinder. Share in the joint steam valve of main steam valve and control valve the valve housing and valve seat. With the surface in a different section of the seat. The main steam valve with diameter 320 motivation driven by the oil at the bottom of the joint steam valve, the valve with a diameter 400 driven by the oil motive in the joint the top of the steam valve. In order to reduce the lifting force of the valve, the upper part of the main steam valve and control valve with pre-Kai valve.Medium pressure main steam valve and adjust the valve stem has a conical sealing surface of the valve in fully open position, the valve stem cone close to the sleeve sealing surface to prevent stem leak.Temporary filter (breakdown), the power plant used during the test run, in the interior of the main steam valve replaced with a permanent filter (coarse mesh) after the end of the trial run.Valves and Piping1 HP Main Steam Control ValveThis unit has 2 HP main steam stop & control valves that are arranged at the two sides of the turbine. Each HP main steam stop & control valve consists of 1 main stop valve and two control valves. The control valves and main stop valve are arranged in a triangle manner inside the valve casing, which is characterized by a compact structure. Located at the left side are the control valves 1# and 4#. Control valves 2# and 3# are located at the right side. The mating diameter of the main stop valve is 170.Mating diameter of control valves 1# and 2# is 120 whereas that of control valves 3# and 4# is 100. In order to reduce the lifting force of the valve, the main stop valves and control valves are all equipped with pre-start valves. The 4 control valves control the 4 corresponding nozzles groups inside the HP inner casing respectively. The control valves are controlled by their respective servomotors. The main stop valves inlets are provided with thermocouples so as to monitor the differential temperature of the valve casing to reduce the thermal stress. The main stop valve stem is provided with taper sealing surface. When the main stop valve is fully opened, the valve stem taper surface goes against the bushing sealing surface tightly so as to prevent steam leakage from the valve stem.Temporary screens (fine) are installed inside the main stop valves and are used during the commissioning phase of the power plant. Following the completion of the commissioning, the temporary screens will be replaced with permanent screens (coarse).2. MP Combined Steam ValvesThis unit is provided with 2 MP combined steam valves on the left and right sides. They are located at both sides of the HIP casing in the middle. Within the combined steam valves, the stop valve and control valve will share a common valve casing and valve seat. The joining faces are located at different sections of the valve seat. The main stop valve has a mating diameter of 320 and is driven by the servomotor located below the combined steam valve. The control valve has a mating diameter of 400 and is driven by the servomotor located on the top of the combined valve. In order to reduce the lifting force of the valve, main stop valves and control valves are provided with pre-start valves.MP main stop valves and control valves valve stems are provided with taper sealing surface. When the valve is fully opened, the valve stem taper surface goes against the bushing sealing surface tightly to prevent steam leakage from the valve stem. Temporary screens (fine) are installed inside the main stop valves and are used during the commissioning phase of the power plant. Following the completion of the commissioning, the temporary screens will be replaced with permanent screens (coarse). introduction to drain water systemDrain system: steam turbinestartup,shutdown,low load operationor low-parametersat run time,Turbinevalves,main steampipeandreheatsteam pipe,steam extractionpiping, steammarshalingthesteamandtheextractiontubeand so may becondensedcondensate.Condensatemustbecatharsisout, or may causetheturbineinlet, causingthewaterimpact, resulting indamage to the machine.Rational arrangement ofthedrain systempipingandtimelyhydrophobicistheguaranteetheTurbinesafe operation ofthenecessaryconditions.Steam Turbine, main steam valve,control valve, high pressuremain steampipes,medium pressuremain steampipe,heat recoverysteam extractionpiping(extractioncheck valve),hydrophobic,constitutetheSteam Turbineand pipedrain system.Thepressureofthedrainsshould bepressure onthe level oforderin orderto importhigh,medium and low voltagesparsewater pipe,theimportofhydrophobicexpansionbypooling.After theexpansionof thesteaminto the condenserbytheexpansion ofthesteam pipes,condensationhydrophobicintroduction ofthecondenserhot well.Thishydrophobicwayvalvecentralized,easytocontrol,maintain,andeasy maintenance, but alsobecause ofthemoisture separator, to avoidthesoftimpactofthethermalwells.The systemof drainage pipepressurein descending order, followed bysparsejellyfishtube connectedtosmoothinteresthydrophobic.Pneumatictrapinthedrain systemby the controlsystemtoachieveautomaticcontrol functions.

Lesson Six steam extraction, gland seal and vacuum systemExhaustsystem:The unit is7exhaust,twohigh pressureheaters,deaerator, fourlow-pressureheaters.Theexhaustcheck valve:use of pneumatic.Avoidthe shortcomingsofthecorrosionofhydraulicjam,andthereaction timehydraulicfast,better able toadapttothe safe operationoftheunit.Thegassource iscompressed air system.Steam extraction system: this unit has 7 stages steam extraction, two HP heaters, one deaerator and four LP heaters. The Steam extraction non return valve is adopted by pneumatic method in order to avoid the corrosion and jam fault by hydraulic control and the reaction time is more faster than hydraulic control so as to be able to adapt to the safe operation of generating units. the gas source will be provided by compressed air system.

Self sealing glad seal system1 2-5-1CYSSRCFSSRCFSSRCF2 (2-5-2)0.13MPa3 -6.3kPa95kPa4 150The main function of the turbine steam seal system is to use the steam supplied by the system to seal the steam of the HP and IP casings from leaking out and prevent air from entering the LP casing through the shaft ends to break the condenser vacuum.This unit is provided with a total of five groups of steam seals on the HIP and LP casings. HIP casing front and rear gland seals use high and low sharp seal strips which are of soft ferrite structure. LP steam seals use bare shaft sharp strips made of copper. HIP intermediate steal seal has two sections, whose purpose is to reduce the steam leakage from the HP casing.HP casing real steam seal has four sections. The first sections bleeding steam is directed to the deaerator (CY); the second sections bleeding steam is used as self-sealing system connection (SSR); and the third sections bleeding steam is directed to seal steam heater (CF).IP casing rear steam seal has three sections. The first sections bleeding steam is used as self-sealing system connection (SSR); the second sections bleeding steam is directed to seal steam heater (CF).LP casing front and rear steam seals each have three sections. The first section supplied steam is used as self-sealing system connection (SSR); the second sections bleeding steam is directed to seal steam heater (CF).Self-Sealing System see the Turbine Self-Sealing System Instruction .

The vacuum system: condenser, condensate pump, vacuum pump and air ejector. Its role is to maintain the turbine to run in a certain back pressure, while the condensate back to the boiler to participate in the thermodynamic cycle.Vacuum system consists of condenser, condensate pump, vacuum pump and air extractor. Its function is to maintain steam turbine in operation under the certain operating back pressure, at the same time, the condensate water is fed back to the boiler to participate in the thermal cycle. 270Pa/min

Lesson Seven Condensate Water, HP/LP Feed Water and Cooling Water SystemCondensate system#7#6#5#4#7U#4#5#6

Cooling water system: including CW system and industrial water systemThemainroleofthecirculating cooling water systemwithamechanical draft cooling towertoprovidecooling watertothecondenser.The system can alsoprovidesomeauxiliarytothemain plantcooling water,suchasoil cooler,air cooler.Circulating cooling waterprocess is as follows:Thecirculating pumpPressure Pipingturbinepressuredrain pipesofthe condenserandtheauxiliarycoolermechanicaldraft cooling towersumpnoflow incircularditchcirculationpump waterwellscirculating pump.This project usesthecirculating cooling water systemwithamechanical draft cooling tower.With verticalmixed flow pumpforcirculating water pump,5 50%capacitycirculating pumppertwo unitsconfiguration,4computer runningastand.

Industrial water is used to cool equipment, bearings, primarily for feed pumps, condensate pumps, plus the drain pump, EH oil installations, such as cooling water.Water from industrial pumps, a total of three, two of them run a backup.Return to the circulating water return pipe.Industrial water is used to cool equipment, bearings, primarily for feed pumps, condensate pumps, plus the drain pump, EH oil installations, such as cooling water.Water from industrial pumps, a total of three, two of them run a backup.Return to the circulating water return pipe.

Lesson EightUnit Start up and Shutdown Operation and TroubleshootingStartstateofdivided:Turbine Startstate,dividedbyhigh pressurewithin thecylindertoadjust thelevelathalfthe inner walltemperature:Cold state:below150 CStatetemperature:150~300Thermal state:300~400Very Hot:morethan400

Are briefly described below unit commitment steps and deal with the accident:Cold sliding parameter start up

The turbine startup is prohibitted when it is found that one of the following conditionsThe eccentric centre of turbine rotor exceeds the original value by 30m (the original value is measured after overhaul).The emergency governor movement is abnormal or overspeed protection cannot act reliably.There is jam fault for one of HP/LP main stop valve,governing valve,extraction check valve and HP cylinder exhaust check valve,which can not be closed tightly.The governing system of the steam turbine cannot maintain the idling operation or cannot control the rotational speed to cause the emergency governor movement after load rejection.The rotational parts of the steam turbine and generator have an obvious friction sounds or the turning gear current increases obviously and swings with the vast scale.The up and down temperature difference of HP inner casing is more than 35The up and down temperature difference of HP outer casing IP cylinder is more than 50.The turbine differential expansion is up to the limit value.8.the monitoring function of main parameters loss( such as rotational speed, vibration, axial displacement, differential expansion, HP turbine oil pressure, lube oil pressure,lube oil temperature, fire resistant oil pressure, bearing metal temperature, bearing oil drain temperature, thrust pad temperature, main steam pressure and temperature, reheat steam pressure and temperature, condenser vacuum, Security system pressure switch, metal temperature of main cylinders, water level and oil level,etc.).9.Any safety device or system malfunctionthe working value of unit protection does not conform to the stipulation.10.Any one of AC/DC lube oil pump,jacking oil pump,turning gear and EH oil pump goes wrong or The corresponding interlock protection test is not qualified.11 The oil level of lube oil tank and fire resistant oil tank is less than ultimate value or the oil quality and cleanliness are unqualified, the inlet oil temperature of bearing is less than 35 or the scavenge oil temperature is more than 65. 12 Turbine water seepage13 The water and steam quality does not meet the requirement.14 The unit heat insulation is imperfect. 15 The other supplementary equipment of power plant or the system work is abnormalBefore the start ofpreparatory workTheunitsinterlock protectiontestand bootbefore thetestwell:(a)static testofthesteam turbine governing system;(b)turbine ETStest;c.largeunitinterlocktest;(d)TurbineAC lube oil pump,DClube oil pumpinterlock test,jackingoil pump,mainfuel tankexhaust faninterlocktest;(e)tothepumpinterlock test;(f)circulating water pumpinterlock test;(g)vacuum pumpinterlock test;hcondensate pumpinterlock test;i.EHpumpinterlock test;high and low pressureheateranddeaeratorprotectiontest;k.electricdoors,pneumaticdoor switchtest.lhigh-and low-bypassdevicelinkage testm,thecooling water pumpinterlock test.nrotatingmachinerysegmenttestswitch tonormal.

2. Industrial water systems have been put into operation, and normal3 auxiliary rotating part jam, bearing lubricants, cooling water, seal water system is(4) cooling tower, vacuum pump separators have been added to the normal water level, put into operation the circulating water system5 turbine fuel tank, EH tank oil level is normal, good oil circulation, oil qualified. Various power equipment oil level is normal6. Instrument air compression system has been put into operation, and normal7 Press to activate the state ready to start the operation order8 to start the circulation pump, check the system properly.Start circulating water boost pump, check the system is operating normally.10 confirm the auxiliary steam system is operating normally.11 into the lubricating oil system: Start AC lube oil pump, jacking oil pump and turning device12 operation of EH oil system13 put into operation in the condensate system, deaerator replenishment14 investment and operation and auxiliary steam system, deaerator heating system water15 may be needed to start electric feed pump, Boiler16 drain system put into operation, open the steam turbine ministries hydrophobic17 Start the vacuum pump18 into the shaft seal system19 boiler ignition, boost heating20 According to the boiler need to invest, low side21 required to put in the relevant protectionThe inspection and preparation before the unit startupAll maintenance works are overThe work ticket has been taken back completelyand has the detailed overhaul records.The site is clean, the road is unimpeded and the illumination is goodThe unit interlock protection test and test brforce starting up are all rightThe rotational parts of Various auxiliary equipment dont have seizure phenomenonthe bearing lube oil,cooling water and seal water sytem are normalAll nilometers and oil level indicators are put into operationThe cooling tower and the segregator of vacuum pump have been fed up to the normal water levelThe oil level of main oil tank of turbine and EH oil tank is normalthe oil circulation is all right and the oil quality is qualified.the oil level of various power equipment is normalThe industrial water system has been put into operation and works normallyThe preliminary operation of rotation machinery subsection is normalThe instrument compressed air system has been put into operation and works normallyCheck the feed water system is normalstart up the auxiliary oil pump and A /B feed water pump operation 12.Check the valve position conforms to the contents of inspection card according to valve inspection card The preparatory work before starting upPrepare the operation ticket according to starting up condition.Prepare all instruments and tools used for operationTest before startup of turbineafter the major and minor repair of unitThe static test of turbine governing systemTurbine ETS testThe big interlock test of unit The interlock test of AC lubricating oil pump, DC lubricating oil pump ,jacking oil pump and smoke exhaust fan of main fuel tankThe interlock test of feed water pumpThe interlock test of circulating water pumpThe interlock test of vacuum pumpThe interlock test of condensate pumpThe interlock test of EH oil pumpProtection test of HP/LP heater and deaeratorSwitch test of each electrically operated valve and pneumatic valve.The interlock test of the HP/LP bypass device 13The interlock test of cooling water pump Startting up of unit auxiliary systems and equipmentConfirm the compressed-air system works normally.Start up the circulating water pump and check the system is normal,Start up the CW booster pump and check the system works normally.Confirm the auxiliary steam system works normally.The lube oil system is put into operationStart up AC lube oil pumpslowly open the outlet valve to fill oil in the oil systemcheck the lubrication pressure 0.10.15Mpa. it is noticed that the electric current,pressure,vibration and sound should be normalcheck whether there is oil leak phenomenon in the systemthe various bearing shell oil drain should be normal, start up the smoke exhaust fan.Start up the jacking oil pumpThe lube oil pressure is not less than 0.08MPathe oil temperatur eis not less than 25check the jacking oil filling valve of various bearings should be opened.Open the jacking oil filling valvestart up the jacking oil pump, the interlock of jacking oil pump is put into service.Check the jacking oil pressure of every bearingthe jacking oil pressure of main pipe is not less than 1014Mpa, confirm the large shaft or the macro-axis has been jacked. Check the turning gear. The protection control power source is normal, the interlock test of the low oil pressure is normal and put into servicestart up the turning gear and the Continuous turning gear is put into service.After the Turning Gear is started upcheck the difference between rotor eccentricity and the original value is not more than 30m.Listen attentively to steam turbine, generator and various bearings sound should be normal. EH oil system is put into operation. Cooperate to do the valve static relation setting test with I&C and turbine personnel. the condensate system is put into operationContact the person for chemistry discipline to fill water in the makeup water tank till the water level is normal.To fill water in the condenser till the water level is normal. Beforce the condenser makeup water, refill water to the condenser again after the storage water in the condensate system should be drained out.Check each emptying conduit of condensate system is closed, the inlet and outlet valves of LP heater are opened and the bypass valve is closed.Start up the condensate pumpadjust the recirculating valve to the condenser, the outlet main pipe pressure of condensate booster pump maintains at 1.52.0Mpa.Open the makeup water valve for boiler cold state to fill water to boiler according to condition.Open the makeup water valve to fill water to deaerator till the water level is normal.During starting upadjust the emptying conduit in the front of outlet valve of No#4 LP heater beforce the condensate water is qualifiedfill the make up water to the condenser again after the water level of condenser will be discharged to the low water level in order to reduce the time and quantity of replacement unqualified water,but it is noticed that the water level of condenser and deaerator is in the normal range.11. The heating and water generation of deaeratorThe auxiliary steam has been ready for steam supply conditionsthe water level of the deaerator water tank is normalthe water level instruction in the CRT is correct.The water level of deaerator is made up to the normal level.Open the electrically operated valve from auxiliary steam to deaerator and reboiling valve of deaerator for heating. The deaerator pressure is 0.05MPathe water temperature is about 110maintain the parameters of operationthe deaerator pressure should not exceed 0.2Mpa before the condensate water is recycled.12.Open the inlet valve of feed water pump and fill water in it.Check the feed water pump conforms to startup condition, start up the electrically driven feed pump to feed water to boiler according to demands. Pay attention to closing the HP/LP communicating valve for makeup water in the cold state before starting up of feed water pump. NoItemInputRemove1AC lube oilpump interlockFor standby useFor operation and overhaul2DC lube oilpump interlockFor standby useFor operation and overhaul3EH oil pump interlockFor standby useFor operation and overhaul4low lube oil pressure protectionBefore impulse startingAfter shutdown5axial displacement protectionBefore impulse startingAfter shutdown6Low EH oil pressure protectionBefore impulse startingAfter shutdown7Thrust-pad high temperature protectionBefore impulse startingAfter shutdown8Differential expansion protectionBefore impulse startingAfter shutdown9low vacuum protectionAfter synchronizationAfter step-out10overspeed protectionBefore impulse startingAfter shutdown11Main protection operation trip (MPOT)After synchronizationAfter step-out12MFT protectionBefore impulse startingAfter shutdown13Shaft vibration protectionBefore impulse startingAfter shutdown14LP exhaust cylinder automatic water injectionBefore impulse startingAfter shutdown15pump interlockFor standby useFor operation and overhaul16jacking oil pump interlockFor standby or operationFor overhaul14.The protection and the interlock of the steam turbine is put into opearion and relief according to the following regulations:

Steam Turbine slip parameters Cold Start upAfter the ignition command is received from the unit leaderInform various posts to prepare for it.Start up vacuum pump for vacuumizationStart up the shaft gland heater fanopen the inlet valve of the shaft gland heater fanthe shaft gland extraction system is put into operationthe negative pressure of the shaft gland heater maintains -3.5kPa.Open the master valve of the gland seal auxiliary steam sourcethe low-temperature auxiliary steam source attemperator is put in the Automatic control modethe steam supply temperature is 180250. 5.Open the valve of the low temperature gland seal auxiliary steam source , the steam inlet valve of the low-pressure gland sea,master valve of gland seal steam exhaust and drain valve of gland seal systemthe gland seal delivers steam for pipe warmingthe gland seal auxiliary steam source steam supply station, the overflow station and the low-pressure gland seal desuperheating station automation are put into operation and send steam to the gland sealthe steam supply pressure maintains at 0.128MPathe LP gland seal steam temperature is 120180which makes the end of various gland seals has no steam emittance and inspiration phenomenon. The drain and pipe warming is overclose all the drain valvebut the drain valves behind the low temperature auxiliary steam desuperheater,the low temperature auxiliary steam non return valve and the high temperature auxiliary steam non-return valve should be opened slightly. It is notified that the boiler can be ignited.Open all the drain valve of turbine according to requirement.Adjust the jaw opening of HP/LP bypass according to boiler needsthe LP bypass desuperheating water is put into operationit is guaranteed that the outlet temperature of LP byass primary desuperheater is not more than 160the LP bypass secondary desuperheating water is put into operation ahead of timeit is noticed that the reheater is not overpressure and the steam turbine rotor is not impulsive.In the process of pressure risingthe attention should be paid to check the temperature behind the HP automatic main stop valve and intercept valveHP/IP automatic main stop valve and HP exhaust non- return valve are closed tightlythe turning gear operation is normal. if the turning gear exitsthe Steam turbine speed risesthe HP byass valve should be closed down a bit and the LP bypass valve opened widelythe reheater pressure maintains not to exceed 0.2Mpa.The heating header of HP cylinder is warmed up.it should be fully drained.In the process of pressure rises, adjust timely all the drain valvethe drain flash tank proper pressure maintains not to exceed 0.05Mpa.The relevent protections are put into service according to regulations. 13.According to exhaust temperature risingopen the water spray valve of LP cylinder in time, close it after the exhaust temperature is normal. 1 unit red turn conditions1.1 start the high-voltage AC pumps, high pressure jacking oil pump, lubricating oil systems in normal working condition.1.2 cast plate, and to ensure continuous disk before Rushes car for more than two hours.1.3 the establishment of condenser vacuum condenser pressure reaches 20kPa below.In confirmation of the steam pipe anhydrous steam seal, put the steam seal system, auxiliary steam source. Requirements of the steam seal Pipe Pressure 0.128 MPa, temperature 120 ~ 180 .1.4 piping and body of each hydrophobic gate fully open.Rushes or speed, with load2.1 to determi