多端柔性直流输电系统的自适应下垂控制策略研究

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Abstract The stability of DC voltage has become the key issue of voltage source converter based multi-terminal high voltage direct current transmission (VSC-MTDC) system. In order to overcome the drawbacks of conventional droop strategy in term of complexity of parameters tuning, low control accuracy and lack of flexibility in various circumstances, an improved adaptive droop strategy is proposed in this paper. The droop parameters are designed based on the optimal analysis of load flow and power sharing of the VSC-MTDC system and adjusted adaptively by the control law which is related to local electrical quantities. A four-terminal VSC-MTDC simulation model is built in PSCAD/EMTDC and the results of simulations prove that the proposed droop strategy can promote the performance of the VSC converter under different operating conditions and enhance the flexibility and reliability of the system.

Key words： voltage source converter based multi-terminal high voltage direct current transmission (VSC-MTDC) droop control DC voltage control adaptive control voltage source converter (VSC)

Received: 04 January 2022

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	Articles by authors
	BAI Guoyan
	LI Chunbao
	MENG Fancheng
	LI Mushu
	MA Wenzhong

Cite this article:

BAI Guoyan,LI Chunbao,MENG Fancheng等. Research on an adaptive droop control strategy applied in voltage source converter based multi-terminal high voltage direct current transmission system[J]. Electrical Engineering, 2022, 23(5): 1-8.

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http://dqjs.cesmedia.cn/EN/Y2022/V23/I5/1

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