Electricity Research Centre, University College Dublin

Wind turbine modelling for grid Wind turbine modelling for grid code analysiscode analysis

Alan Mullane & Mark O’MalleyAlan Mullane & Mark O’Malley

Electricity Research Centre (ERC)Electricity Research Centre (ERC)

http://ee.ucd.ie/erc/http://ee.ucd.ie/erc/

Electricity Research Centre, University College Dublin

Grid code - Fault ride throughGrid code - Fault ride through

• Stay connected in shaded Stay connected in shaded regionregion

• Provide active power in Provide active power in proportion to retained proportion to retained voltagevoltage

• Maximise reactive current to Maximise reactive current to transmission NW for at least transmission NW for at least 600ms or until voltage 600ms or until voltage recoveryrecovery

• Provide 90% of max Provide 90% of max achievable power within 1s achievable power within 1s of recoveryof recovery

Electricity Research Centre, University College Dublin

Grid code wind modelGrid code wind model• Wind farm model designed according to Wind farm model designed according to

grid code specificationsgrid code specifications

• Comparison with 300MVA conventional Comparison with 300MVA conventional plantplant• Steam turbine with governorSteam turbine with governor

• IEEE Type 1 Exciter modelIEEE Type 1 Exciter model

• Round rotor synchronous machineRound rotor synchronous machine

• Response to fault on 220kV Transmission Response to fault on 220kV Transmission SystemSystem

Electricity Research Centre, University College Dublin

Voltage comparison for conventional 300MVA station and wind power station (20kV Bus)

Volt

ag

e (

pu

)

Time (s)

Conventional

Wind

Electricity Research Centre, University College Dublin

Reactive Power comparison for conventional 300MVA station & wind power station

React

ive P

ow

er

(MV

Ar)

Time (s)

Conventional

Wind

Electricity Research Centre, University College Dublin

ConclusionsConclusions

• Wind grid codes difficult to designWind grid codes difficult to design

• Dynamic models which map wind grid codes Dynamic models which map wind grid codes are useful for code refinementare useful for code refinement

• No mapping of physical characteristicsNo mapping of physical characteristics

• Use with care Use with care

• Not suitable for connection studies Not suitable for connection studies

• Generic approach should nonetheless be Generic approach should nonetheless be consideredconsidered