Use of STATCOM for Offshore wind stability & grid compliance C Smith 15/10/09 This document contains confidential and proprietary information of Converteam and must not be used for any purpose other than that for which it is supplied by Converteam. Its contents must not be disclosed to any other person nor copied in whole or in part without the prior written consent of Converteam
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Use of STATCOM for Offshore wind stability & grid compliance
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Use of STATCOM for Offshore wind stability & grid compliance
C Smith 15/10/09
This document contains confidential and proprietary information of Converteam and must not be used for any purpose other than that for which it is supplied by Converteam. Its contents must not be disclosed to any other
person nor copied in whole or in part without the prior written consent of Converteam
Nominal offshore wind farm2 off 132kV step out cables of 90km each to meet UK regulator (OFGEM) recommendations72 turbines in 8 strings Connection agreement of 260MWCapacitive element of step out cables 99 MVArTwo design options reviewed
Example from a study of a UK offshore wind farm Long cables introduce resonances Number of turbines connected alters circuit impedance. Resonance point moves
Grid generation/loads changing Wind farms to play a more active role in Ancillary service HydroQuebec grid code now calling for synthetic inertia from wind
farms At present requires derating of wind turbines output
Loss of revenue Energy storage can be added to STATCOM Possible technologies
Supercapictors Flow cells Flywheels
Technology only just becoming commercially viable Our STATCOM example would give 5% at full generation or 15%
Temptation to choose least cost option of mechanically switched devices
STATCOM provide additional advantages: Active damping to improve wind farm stability Frequency response can be retrofitted when
commercially viable
This document contains confidential and proprietary information of Converteam and must not be used for any purpose other than that for which it is supplied by Converteam. Its contents must not be disclosed to any other
person nor copied in whole or in part without the prior written consent of Converteam