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Enhanced DC voltage control strategy for fault management of a VSC-HVDC connected offshore wind farm

Tzelepis, Dimitrios and Oulis Rousis, Anastasios and Dysko, Adam and Booth, Campbell (2017) Enhanced DC voltage control strategy for fault management of a VSC-HVDC connected offshore wind farm. In: RPG 2016 International Conference on Renewable Power Generation. IET, Stevenage. ISBN 9781785613005

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Abstract

This paper proposes a DC voltage control strategy for fault management taking into advantage the operation of the master controller located in the offshore AC substation platform. The issue resolved via the proposed controller relates to over-voltages caused in the HVDC links when the power transfer onshore is disrupted due to faults occurring at the AC side of the onshore grid. The control strategy presented in this paper proposes an effective way of maintaining the DC over-voltage within safety limits via reducing the connected wind farm power output. The operation of the aforementioned control strategy requires small computational power and no communication.