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© 2017 Mita-Teknik. All rights reserved®

Mita-TeknikAdvanced Wind Turbine Concept

Data SheetsPitch Control

MT_MDS V5_DataSheet_R4_0

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© 2017 Mita-Teknik. All rights reserved

electrical pitch systemsMDS V5

Specifications subject to change

Tailored SolutionThe cabinets are tailored for the individual wind turbine type. Often MDS V5 standard cabinets are fitted with brackets designed to fit the mounting bolts inside the hub. If standard cabinets cannot be used, new custommade cabinets are designed based on 3D models of the turbine hub.

Additionally, the MDS V5 system can be delivered with different options integrated.

› Individual Pitch Control and/or Collective Pitch Control

› Compact, simple, robust and reliable

› Optimal blade positioning

› Service friendly

› Final calibration during installation in factory

› Adaptable for wind turbines from 1 MW and up

› Compliance to all relevant international and Chinese standards and guidelines

› Designed for cold climate and high altitude

› Easy parameter editing via turbine control system

› Energy Storage: ultracapacitors or VRLA batteries

› Integration with Mita or 3rd party control system

› Communication support library for 3rd party wind turbine control system on request

› Remote software update

› Wide range communication interfaces

› CMS data capturings

MDS Pitch ControlSafety and reliability are essential requirements to ensure optimal wind turbine operation. The MDS Pitch System offers a wide range of in-house designed and manufactured electrical pitch systems, designed to maximize the availability and performance of your wind turbine, while applying minimum loads to the structure. The MDS Pitch System enables you to minimize maintenance costs, reduce downtime and improve ROI.

MDS V5MDS V5 is part of the latest pitch system developments made by Mita-Teknik. The system design is a new generation based on the ideas and components validated during previous MDS versions, and optimized by replacing the weakest component with modern top-shelf components to improve quality and minimize the maintenance requirements. To verify the required robustness and performance, all components are tested in Mita-Teknik laboratories. More of the components are enhanced to extend the IP class, making them robust against small particles inside the cabinets.

MDS V5 is designed for fast charging the energy storage based on ultracapacitors. MDS V5 use dynamic switching (patent pending) of the ultracapacitors to utilize maximum stored energy, and at the same time offer maximum power to the pitch motor during LVRT or grid drop when rotor speed is high and maximum pitch performance is required.


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Pitch System PerformanceThe performance required from the pitch system depends on the wind turbine design, end to a large extend this is the rotor diameter and wind class and only secondary to the wind turbine nominal power. The MDS V5 pitch system comes in 9 different drive sizes (62 to 336 A) and 7 different motor sizes (5.5 to 30 kW), which can be mixed in up to 16 different combinations, making it possible to select the most cost efficient solution for any wind turbine.

Mita-Teknik load and control engineers can offer simulation of your wind turbine with all IEC61400 load cases, to ensure the pitch system meets the performance requirements in all relevant situations, and at the same time is not over-dimensioned. The simulation report list all required peak, average and aggregated values to select the optimum MDS V5 solution.

Performance Selection Guide

MDS V5 system peak performance in Nm at nominal motor speed.

Pitch motor speed (rpm)

Pitch motor moment - friction and sweep error included - avg. time: 0 s

Pitc

h m

otor

mom

ent (

Nm

)

11 18,5

152178

259270

210 390

236174

92 180

300144

336

76 138

122

280510

Drive [Apeak]

62 112 123

Motor kW

200

331399485

5,5 7,5 15 22 30


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Maximum Safety The MDS Pitch System pitches the rotor blades collectively (CPC) or individually (IPC) to maintain rotor speed and blade loads at optimum, while at the same time keep the rotor speed below maximum. The blades are pitched to feathering position - automatically and autonomously in case of safety system activation. This ensures that the wind turbine come to a safe stop.

Maximum wind turbine safety is achieved by three separate and independent MDS cabinets, working as an integrated part of the wind turbine safety system. This design gives the individual MDS V5 the possibility to activate the turbine safety system in case any unsafe conditions develops inside the pitch system.

The MDS Pitch System continuously monitors the communi-cation from the wind turbine controller, and the health of all pitch system components, including pitch motor and energy storage, and it ensures the wind turbine is stopped even if the wind turbine control system is failing. In case of grid fault and/or grid drop, the MDS Pitch System is powered from the energy storage.

The energy storage delivers the power and energy to the pitch system during grid fault (LVRT) until grid returns - and in case the grid does not return (grid drop), the energy storage also delivers power and energy for pitching the blades to feathering position, bringing the wind turbine to a full stop.

Robust HardwareThe MDS V5 Pitch System is designed for the harsh environment in the rotating hub of on- and offshore wind turbines. The MDS V5 Pitch System performs effortlessly in wide temperature ranges, continuous vibrations and forces induced during constant rotation and emergency stops. Additionally, the cabinet doors can withstand the weight of service personnel working in the hub.

Complete SolutionMDS V5 is delivered as a complete electrical pitch solution for your wind turbine. The complete solution includes the following components:

› 3 x MDS V5 cabinet (or compartment) with MDS pitch drive and required surrounding components› 3 x MDS V5 cabinet (or compartment) with energy storage › 3 x MDS V5 pitch servo motor with integrated electrical fails safe brake› 3 x MDS V5 sensor kit (with or without mounting plates and brackets)› 3 x MDS V5 cable set for sensors (customized length)› 1 x MDS V5 cable set for interconnecting the MDS V5 cabinets (customized length)› 1 x MDS V5 cable set for slip ring (customized length and connector)

MaintenanceThe MDS V5 Pitch System requires only simple maintenance. The normal verification/maintenance cycle is once a year, and can be performed very fast, keeping the availability high. To ease the maintenance and service, the following is available:› MDS V5 maintenance manual› MDS V5 maintenance kit› MDS V5 service toolkit

DocumentationAlong with the prototype, Mita-Teknik supply a complete set of documentation. The documentation is in both English and Chinese and consist of the following:› Report with relevant pitch system requirements and calculations (in English only)› Technical manual› Circuit diagram› Commissioning guide› Maintenance manual

ServicesMita-Teknik offer support in relation to MDS V5 Pitch System prototypes. The two following services are offered:› Workshop support - installation, factory commissioning and test› On-site commissioning - pitch system test, turbine startup and troubleshooting

Education & TrainingMita-Teknik offer education and training in relation to MDS V5. The education and training can take place at Mita-Teknik or where the MDS V5 Pitch System is available. The following sessions are offered:› MDS V5 commissioning› MDS V5 maintenance› MDS V5 troubleshooting


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Standards & Guidelines MDS V5 can be delivered in different configurations which are compliant with all relevant international standards and guidelines as well as required Chinese standards and guidelines.

The most important standards are: › IEC 61400-1› IEC 61400-22› IEC 61508› IEC 62061› ISO 13849-1› ISO 13850› DNVGL-ST-0438› DNVGL-RP-0363› DNVGL-RP-0440› DNVGL-SE-0441› DNVGL-SE-0074› DNVGL-ST-0076› GL-IV-1 (GL2010)› GL-IV-2 (GL2012)› IEC 60204-1› IEC 60812› GB/T 32077› GB/T 25386› NB/T 31018

CertificatesThe different configurations af MDS V5 are certified by DNVGL, TÜV Nord, and China General Certification Center (CGC).

The certifications relates to functional safety, component and system approval/compliance.

› IEC 61400-22 (DNVGL)› ISO 13849-1 (TÜV Nord)› GB/T 32077 (CGC)

Wind Turbine CertificationTo support the certification of the wind turbine, Mita-Teknik deliver all the documentation related to Mita-Teknik scope of supply.

The documentation include the following:› MDS V5 certificates› MDS V5 safety compendium› MDS V5 technical manual› MDS V5 commissioning manual› MDS V5 maintenance manual


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Surge Protection

Charger

Energy StorageSensors

MDSServoMotor

MDV V5

Drive

MDS V5Controller

The MDS V5 Components MDS V5 Cabinets

› The standard MDS V5 is a three or six cabinet solution with no need for a centerbox.› In the three cabinet solution, the MDS control and the energy storage is integrated in one cabinet with two compartments - one compartment for the MDS control and one compartment for the energy storage. The compartments are separated with individual removable doors.› The standard MDS V5 cabinets comes in a variety of shapes and sized. Please find the cabinet option details in separate data sheets. The cabinets are available with different coatings and in stainless steel versions fulfilling the requirements for on- and off-shore installation.› All cabinet designs include documentation showing that the cabinets can withstand the forces and fatigue applied in the rotating hub.

Three Cabinet Design: Six Cabinet Design:

Slipring

Slipring

Surge Protection

Charger

Energy Storage

Surge Protection

Charger

Energy Storage

Surge Protection

Charger

Energy Storage

Surge Protection

Charger


MDSServoMotor

MDV V5

Drive

MDS V5Controller

Surge Protection

Charger


MDSServoMotor

MDV V5

Drive

MDS V5Controller

MDV V5

Drive

MDS V5Controller

MDV V5

Drive

MDS V5Controller

MDV V5

Drive

MDS V5Controller

Sensors

MDSServoMotor

Sensors

MDSServoMotor

Sensors

MDSServoMotor


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The MDS V5 Components MDS V5 Pitch Drive and Controller

› The task of controlling the pitch motor speed and positioning the wind turbine blade at the desired angle is performed by the MDS V5 drive and controller (one set per blade). › The MDS V5 drive is an advanced high performance frequency converter with integrated PLC.› The drive is available in 9 different sizes with different motor current capability.› The PLC and software is equal for all 9 drive sizes.› The MDS V5 drive handles autonomous emergency feathering when the safety system is activated.› In some of the configurations, the MDS V5 controller handles all other functionality and stores all CMS and historical data.

The communication between the wind turbine controller - placed in nacelle or tower base - is handled inside the MDS V5 controller in MDS cabinet #1 or directly to each of the individual MDS V5 drives in some of the configurations.

The controller handles all required protocol conversion and customized data mapping.

In configurations including the MDS V5 controller, the MDS controller is also in charge of all internal command, control and synchronization tasks of the complete pitch system, while also handling the data collection from the MDS controllers in cabinet #2 and #3.

Different communication protocols are available. CANopen and Ethernet based protocols are integrated directly in the MDS V5 controller, and other protocols - e.g. PROFIBUS and EtherCAT - are implemented using additional hardware for the interface. This design ensures that all required protocols can be implemented without redesign of the MDS V5 controller hardware.

The communication between the MDS cabinets is based on Ethernet and is handled by the MDS V5 controllers. This depends on the configuration and is either based on Ethernet, CANopen or Modbus RTU.

In the most advanced configurations, the individual MDS V5 controller handle all communication with the individual MDS V5 drive. The communication runs via Ethernet fieldbus and via RS232 for remote firmware update.

In configurations including Ethernet based communication the user also benefits from easy connection to laptops during any service or trouble shooting session.


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The MDS V5 Components MDS V5 Options

MDS V5 is available with more options which is selected during ordering. As standard some of the options are included by default and is therefore sometimes delivered even if not ordered.

› The communication interface must always be selected.› Main switch on outside the MDS V5 cabinet can be selected. This switch allows operators to switch off the 400 VAC supply. Be aware that main fuse is used as the main switch in case this option is not selected.

When the LED light installed inside each of the MDS V5 cabinet is not sufficient, the hub light option can be selected. The hub light is switched on/off by the existing light switch on the outside of the MDS V5 panel. The hub light option comes in two different versions: › Hub light on MDS V5 control cabinet #1, #2 and #3.› Hub light on MDS V5 control cabinet #1.

Digital IO for monitoring and controlling the lubrication of the blade bearings can be selected. The lubrication comes in different versions all controlled from the wind turbine controller via communication:› 24 VDC 10 A with one relay output and two digital input for monitoring and feedback.› 24 VDC 10 A with two relay output and two digital input for monitoring and feedback.› 24 VDC 20 A with two relay output and two digital input for monitoring and feedback.


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The MDS V5 Components MDS Servo Motors

› The MDS servo motors are designed for optimum performance with the MDS V5 drives.› The MDS servo motors are available in 7 different sizes from 5.5 to 30 kW.› The MDS motors are designed to withstand the continuous vibrations and forces applied by the rotating hub. E.g. the mounting flange is very strong and the bearings are sealed with no requirement for maintenance.

The MDS servo motors have integrated: › Encoder for the closed loop control.› Sensors to monitor the motor temperature, control the preheating and control the forced ventilation.› Safety brake to hold the pitch angle in feathering position when the turbine is stopped.› Fan to ventilate the motor.› Plugable connectors for all cables.

The MDS motors can be selected with different options:› Smaller or bigger flange.› Additional mounting holes in the flange.› Smaller or bigger shaft diameter.› Different coating for on- and off-shore compliance.


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The MDS V5 Components Sensors

› The sensors required for MDS V5 must maintain their low tolerances during their entire operational life- cycle to maintain the blade angle positioning accuracy.

The following sensors are included in the MDS V5 delivery:› Emergency Stop Limit Switch (ESLS) - Limit switch at 100° stopping the blade pitching in case of pitch system failure.› Safety Stop Limit Switch (SSLS) - Limit switch at 90° activated when the blade is in feathering position.› Inductive Tooth Edge Sensor (ITES) - Inductive sensor monitoring the passing edges of the teeth on the blade bearing.

› Mita-Teknik also offers standard mounting plades and customized brackets for the sensor mounting.


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The MDS V5 Components Energy Storage

› The energy storage supplies the energy to MDS V5 during LVRT and grid drop. › The energy storage is always designed to deliver the required power and energy during LVRT and a following grid drop. The design takes the natural aging of the energy storage into consideration to balance the performance and the expected service life.

Energy storage is often selected based on the fact that VRLA batteries have lower initial cost, and ultracapacitors have longer service life. The energy storage can be delivered in the following configurations: › Ultracapacitor with minimum 5 and maximum 30 modules (each 90 V 10F).› VRLA battery with 33 or 66 modules type LC- WTV127R2 for maximum 5 years service life.› VRLA battery with 33 or 66 modules type LC- WTP127R2 for maximum 10 years service life.


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The MDS V5 Components Cables

› Mita-Teknik can deliver a complete set of cables to install in the hub.› The set of cables consist of power and control cables to interconnect the MDS V5 panels, to interface to the slip ring to install between the sensors and the MDS V5 panels and to connect the servo motor to the MDS V5 cabinet.› The cables are customized to the exact lengths fitting the installation best possible. › For prototypes, a set of standard length cables are available. These cables can then be used - as is - with the excessive cable length tightened in a loop, or the cables can be shortened to fit perfectly.› An option is also that Mita-Teknik delivers the set of plugs only (no cables).


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The MDS V5 Components Accessories

› The MDS V5 accessories are to be used during installation, commissioning, maintenance and service. The accessories consist of a number of different tools required, where some is designed especially for MDS V5 and sold exclusively through Mita-Teknik, and others are standard tools available from suppliers worldwide.

The accessories only available from Mita-Teknik are:› Service box - to manually position the blade at any desired angle.› PC tools - MS Windows software to update MDS V5 software and parameter monitoring/setting.› Reform box - the tool to reform the MDS V5 drive in case of continues storage for more than 12 months. › Battery charger for storage - the tool to recharge the energy storage if stored for more than 6-12 months (only required for energy storage with VRLA batteries when it is not convenient to use the integrated charger system).


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Technical Data

Main Supply VoltageNominalAllowed rangeFrequency, main supply, type

Operation temperatureTransportation/Storage temperatureMax. relative humidityMax. operating height

MDS Servo MotorNominal PowerPeak motor torqueHolding brake torque

Energy StorageUltra capacitorVRLA batteriesVRLA batteries

Fieldbus Interfaces Modbus TCP Modbus RTU CANopenCommunication speed 100 Mbit 38.4 kBaud 500 kBaudTransfer cable STP Cat 5E Shielded twisted pair Shielded twisted pair*Other fieldbus interfaces on request

Degree of ProtectionDegree of Protection

StandardsGB/T 25386 Wind Turbine Generator System - Variable Speed Constant Frequency

GB/T 32077NB/T 31018 Wind Turbine Generator System Technical Specification of Electric

EN 60204-1 Safety of machinery - Electrical equipment of machinesEN 13850 Safety of machinery – Emergency stop function – Principles for design EN 13849-1 Safety of machinery - Safety-related parts of control systems -

EN 61439-1 Low-voltage switchgear and controlgear assemblies - Part 1: General rulesEN 61439-2

IEC 61400-1IEC 61400-22IEC 61508

IEC 62061

DNVGL-RP-0363DNVGL-RP-0440DNVGL-SE-0441DNVGL-SE-0074

DNVGL-ST-0076GL-IV-1 (GL2010)GL-IV-2 (GL2012)IEC 60812

Pitch System

Part 1 : General principles for design

Low-voltage switchgear and control gear assemblies - Part 2: Power switchgear and controlgear assemblies

Electromagnetic compatibility of wind turbinesType and component certification of wind turbinesType and component certification of wind turbines according to IEC 61400-22Design of electrical installations for wind turbinesGuideline for the Certification of Wind Turbines - Edition 2010Guideline for the Certification of Offshore Wind Turbines - Edition 2012 Analysis techniques for system reliability – Procedure for failure modeand effects analysis (FMEA)

Design requirementsConformity testing and certificationFunctional Safety of Electrical/Electronic/Programmable Electronic Safety-related SystemsSafety of machinery - Functional safety of safety-related electrical, electronic and programmable electronic control systemsExtreme temperature conditions for wind turbines

95% @ 40°C non condensation1000 m. above sea level4900 m. above sea level with derating

Permissible Ambient Conditions

-40 to 50°C (up to 70°C with restrictions) -30 to 50°C (up to 60°C with restrictions)

3 x 400 VAC3 x 400 VAC +-10% continuous, LVRT: 2..5s, HVRT: +20% @30s, +30% @2s50/60 Hz

IP54

5.5 to 30 kW112 to 510 Nm100 to 450 Nm

33 or 66 LC-WTV127R233 or 66 LC-WTP127R2

Wind turbine generator system - Pitch system

5 to 30 ultracapacitor modules 90V 10F

Control System


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Mita-Teknik Ordering InformationFor ordering the MDS V5 pitch system, please contact Mita-Teknik, and we will support you configuring the MDS V5 Pitch System fulfilling all your requirements.

The configuration process is supported by a MDS questionaire, which ensures all relevant information and requirements are documented systematically prior to the MDS system configuration.

Standard accessories are listed below.

Technical Data

Main Supply VoltageNominalAllowed rangeFrequency, main supply, type

Operation temperatureTransportation/Storage temperatureMax. relative humidityMax. operating height

MDS Servo MotorNominal PowerPeak motor torqueHolding brake torque

Energy StorageUltra capacitorVRLA batteriesVRLA batteries

Fieldbus Interfaces Modbus TCP Modbus RTU CANopenCommunication speed 100 Mbit 38.4 kBaud 500 kBaudTransfer cable STP Cat 5E Shielded twisted pair Shielded twisted pair*Other fieldbus interfaces on request

Degree of ProtectionDegree of Protection

StandardsGB/T 25386 Wind Turbine Generator System - Variable Speed Constant Frequency

GB/T 32077NB/T 31018 Wind Turbine Generator System Technical Specification of Electric

EN 60204-1 Safety of machinery - Electrical equipment of machinesEN 13850 Safety of machinery – Emergency stop function – Principles for design EN 13849-1 Safety of machinery - Safety-related parts of control systems -

EN 61439-1 Low-voltage switchgear and controlgear assemblies - Part 1: General rulesEN 61439-2

IEC 61400-1IEC 61400-22IEC 61508

IEC 62061

DNVGL-RP-0363DNVGL-RP-0440DNVGL-SE-0441DNVGL-SE-0074

DNVGL-ST-0076GL-IV-1 (GL2010)GL-IV-2 (GL2012)IEC 60812

Pitch System

Part 1 : General principles for design

Low-voltage switchgear and control gear assemblies - Part 2: Power switchgear and controlgear assemblies

Electromagnetic compatibility of wind turbinesType and component certification of wind turbinesType and component certification of wind turbines according to IEC 61400-22Design of electrical installations for wind turbinesGuideline for the Certification of Wind Turbines - Edition 2010Guideline for the Certification of Offshore Wind Turbines - Edition 2012 Analysis techniques for system reliability – Procedure for failure modeand effects analysis (FMEA)

Design requirementsConformity testing and certificationFunctional Safety of Electrical/Electronic/Programmable Electronic Safety-related SystemsSafety of machinery - Functional safety of safety-related electrical, electronic and programmable electronic control systemsExtreme temperature conditions for wind turbines

95% @ 40°C non condensation1000 m. above sea level4900 m. above sea level with derating

Permissible Ambient Conditions

-40 to 50°C (up to 70°C with restrictions) -30 to 50°C (up to 60°C with restrictions)

3 x 400 VAC3 x 400 VAC +-10% continuous, LVRT: 2..5s, HVRT: +20% @30s, +30% @2s50/60 Hz

IP54

5.5 to 30 kW112 to 510 Nm100 to 450 Nm

33 or 66 LC-WTV127R233 or 66 LC-WTP127R2

Wind turbine generator system - Pitch system

5 to 30 ultracapacitor modules 90V 10F

Control System

Sensor KitSensors - ESLS, SSLS, ITES 12mmSensors - ESLS, SSLS, ITES 18mm

AccessoriesService BoxKeypadRS232 CablePC ToolsToolsVacuum CleanerMultimeterReform BoxBattery Charger for Storage

DocumentationTechnical ManualMaintenance ManualCommissioning GuideCircuit DiagramProgrammers ManualCANopen Support library CoDeSysCANopen Support library ANSI C

EducationMDS V8 MaintenanceMDS V8 CommissioningMDS V8 Trouble Shooting

ServicesWorkshop SupportCommissioning Onsite Support

892856x

892857xxx892857xxx892857xxx

892857xxx

Order Number892856x

892856x892856x

892856x892856x892856x

Order Number892857xxx

892856x892856x

Order Number8928541289285418

Order Number892859x892859x

892858x892858x

Order Number892858x

892857xxx892857xxx


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Mita-Teknik Ordering Information

Sensor KitSensors - ESLS, SSLS, ITES 12mmSensors - ESLS, SSLS, ITES 18mm

AccessoriesService BoxKeypadRS232 CablePC ToolsToolsVacuum CleanerMultimeterReform BoxBattery Charger for Storage

DocumentationTechnical ManualMaintenance ManualCommissioning GuideCircuit DiagramProgrammers ManualCANopen Support library CoDeSysCANopen Support library ANSI C

EducationMDS V8 MaintenanceMDS V8 CommissioningMDS V8 Trouble Shooting

ServicesWorkshop SupportCommissioning Onsite Support

892856x

892857xxx892857xxx892857xxx

892857xxx

Order Number892856x

892856x892856x

892856x892856x892856x

Order Number892857xxx

892856x892856x

Order Number8928541289285418

Order Number892859x892859x

892858x892858x

Order Number892858x

892857xxx892857xxx

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