计及换流站间电压误差的VSC-MTDC系统自适应下垂控制

doi:10.19595/j.cnki.1000-6753.tces.190722

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Abstract Aiming at the problem of power coordination control among converter stations in VSC-MTDC system, an adaptive droop control strategy considering DC voltage errors among converter stations is proposed. The strategy considers the influence of DC voltage errors among converter stations on power regulation. When the DC voltage reaches the allowable fluctuation limit, all converter stations with adaptive droop control reach or approach full load almost at the same time. It can maximize the active power capacity of converter stations, and improve the accuracy of unbalanced power distribution according to the power margins of converter stations. In addition, the droop coefficient can be flexibly adjusted according to the available power and the allowable voltage of the converter station, which can significantly reduce the voltage fluctuation on the DC side. The simulation results verify the feasibility and effectiveness of the proposed control strategy.

Key words： Voltage source converter multi-terminal DC adaptive droop control coordinated control power margin

Received: 17 June 2019

PACS:

TM721.1

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	Liu Yingpei
	Xie Sai
	Liang Haiping
	Xie Qian

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Liu Yingpei,Xie Sai,Liang Haiping等. Adaptive Droop Control Strategy for VSC-MTDC System Considering DC Voltage Errors Among Converter Stations[J]. Transactions of China Electrotechnical Society, 2020, 35(15): 3270-3280.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.190722 OR https://dgjsxb.ces-transaction.com/EN/Y2020/V35/I15/3270

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