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Frequency Control Design for Offshore Wind Farm Grid With LCC-HVDC Link Connection

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3 Author(s)
Risheng Li ; Univ. of Nottingham, Nottingham ; Serhiy Bozhko ; Greg Asher

This paper considers the formal design for the grid frequency control in an offshore wind farm connected with line-commutated converter high voltage dc (HVDC) link. The control paradigm is based on using the grid frequency control to regulate the HVDC rectifier firing angle or dc-link current and hence control the power flow in the system. The dynamic behaviors of the system are verified by comparing the response from derived transfer functions and PSCAD simulations; hence the grid frequency controllers are designed. The control system performance has been validated by simulations of normal operation and fault regimes. The work provides a good basis for wider research investigation into wind farm operation.

Published in:

IEEE Transactions on Power Electronics  (Volume:23 ,  Issue: 3 )