distribution automation new

21
EMS SCADA DAC GENERATION AND TRANSMISSION SYSTEM DISTRIBUTI ON SYSTEM CONNECTE D LOAD Monitoring and controlling of electric power system

Upload: venki249

Post on 11-Nov-2015

253 views

Category:

Documents


2 download

DESCRIPTION

Distribution Automation new

TRANSCRIPT

Introduction (What Is SCADA?)

EMSSCADADACGENERATION AND TRANSMISSION SYSTEMDISTRIBUTION SYSTEMCONNECTED LOADMonitoring and controlling of electric power system

Introduction

1)The main purpose of electric power system is to efficiently Generate, transmit and distribute Electrical energy. 2)The energy Management System (EMS) exersises overall control over the total system.

3)The Supervisory control And Data Acquisition (SCADA) System involves generation and transmission systems. 4)The Distribution Automation and Control (DAC) is an integrated concept of digital automation of distribution substation, feeder and user functions. 5)The DAC functions include control, protection, monitoring of distribution system as well as load management and remote metering.

SCADA PURPOSETo Provide the user with the capability to exercise control over a specific device and confirm its performance in accordance with the directed action.To process those data for use by operatorOperator control of remote devicesaSCADA systems consist of: 1)One or more field data interface devices, usually RTUs, or PLCs, which interface to field sensing devices and local control switchboxes and valve actuators 2)A communications system used to transfer data between field data interface devices and control units and the computers in the SCADA central host. The system can be radio, telephone, cable, satellite, etc., or any combination of these. 3) A central host computer server or servers (sometimes called a SCADA Centre, master station, or Master Terminal Unit (MTU) 4) A collection of standard and/or custom software [sometimes called Human Machine Interface (HMI) software or Man Machine Interface (MMI) software] systems used to provide the SCADA central host and operator terminal application, support the communications system, and monitor and control remotely located field data interface devices

SCADA FEATURESViewing of Real time Data through Dynamic DisplaysManual Data entrySupervisory controlTrend curves (four at a time)Alarm & Events processingReport GenerationFUNCTIONS OF SCADADATA ACQUISITIONSUPERVISORY CONTROLALARM PROCESSINGINFORMATION STORAGE AND REPORTSDATA CALCULATIONSSCADA Components Field Instrumentation.Sensors, devices to control.Remote Terminal Units.RTU Vs. PLCCommunications Network.Equipment needed to transfer data to and from different sites Central Monitoring StationCollecting information gathered by the remote stations to generate the necessary action Advantages Of SCADA systemsEasily programmed or reprogrammed Easy maintained (self diagnostic).Capability to do arithmetic function.The ability to communicate with other controller or a master host computer.PLCs. were able to move past simple on/off control to more complex schemes as PID control.

Applications Of SCADAAlmost every business in the manufacturing sector and many in the service sector AerospaceBottling and CanningChemicals PlantsPetroleum, PetrochemicalPower generation and transmission\Traction

NLDCNRLDCERLDCSRLDCWRLDCNERLDCPONDYTNEBAPTRANSCOKARNATAKAKERALACHINAKAMPALLY(CDP)NUNNA (VJA)MAMIDIPALLY(HYD)WARANGALSubstation /RTU station(1)SLDCsRLDCsSubstation /RTU station(21)Substation /RTU station(1)Substation /RTU stationSubstation /RTU stationSubstation /RTU stationSubstation /RTU stationINTEGRATED ULDC in NATIONAL GRID Substation /RTU Distribution Automation1.CAPITAL DEFERRED BENEFITS. Elimination of the need for purchase of certain equipment by one or more years Saving in capital investment2.OPERATION &MAINTENANCE BENEFITSAvoid equipment damage,reduce power loss,reduction in theft of energy,savings in man power costs3.CUSTOMER RELATED BENEFITSVoltage profile ,continuity of service

BENEFITS OF DA The term DMS is used to denote computer control system for a distribution control center that contains traditional SCADA functions and also contains functions that analyze present and future conditions on the distribution system to support distribution operations DISTRIBUTION MANAGEMENT SYSTEMSUBSTATION AND FEEDER SCADASUBSTATION AUTOMATION FEEDER AUTOMATIoNDISTRIBUTION SYSTEM ANALYSISINTERFACES TO OTHER COMPUTER SYSTEM

FUNCTIONS OF DMSAPPLICATIONSIndustrial controlOil & gas transmission,production and distributionWaste water utilitiesElectric utility for remote control of substationsPower distribution automationDISTRIBUTION AUTOMATION FUNCTIONALITYDistribution Automation means the Automation of Distribution substations, feeder monitoring and control and Consumer metering functions. DISTRIBUTION AUTOMATION CONTROL FUNCTIONSCustomer load demandPeak load pricingLoad sheddingSudden load pickupCapacitor controlVoltage regulationFeeder load managemantTranformer load mangement

Block diagram of distribution automation system It collection of information, transferring it to a DCC, displaying the information and carrying out analysis for control decision and improvement in system operation. The control action is then initiated either through remotely operable device or manually. A typical DA system is composed of field instrumentation, remote terminal unit, communication systems and distribution automation software. In a typical distribution automation system is shown below.

Table 1

Distribution automation componentsThe developed components for power distribution automation under the technology development mission described as follows:1.distribution automation software2.Remote Terminal Unit3.remotely operable switch4.communication system5.substation IEDs and protocols

A typical SCADA system architectureDistribution automation software

The master DA software and the engineering analysis software are the two common elements of DCC.The master DA software provides the system information.The engineering analysis software uses the system information to provide the appropriate control decisions.