基于下垂控制的多端直流系统稳定性分析

doi:10.19595/j.cnki.1000-6753.tces.L90185

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Abstract The multi-terminal DC system is one of the important forms of the future power grid, and its stability control is an important foundation for ensuring the economic and efficient operation of the system. As the main coordinated control method of multi-terminal DC system, the control strategy of droop control and key parameters of the system are closely related to the small signal stability of the system. In order to improve the system stability, this paper built a multi-terminal DC system small signal model based on droop control, and used the dominant eigenvalue analysis method to explore the influence of different parameters such as controller parameters and DC side capacitance on the system stability, and further analyzed the corresponding sensitivity, and looks for key parameters that affect system stability. Finally, it was verified by Matlab/Simulink simulation model. The results show that the method described in this article can effectively reveal the key factors that affect the stability of the system. By reasonably adjusting its size, the system’s stable operating capacity can be effectively improved, and the system’s DC load access capacitycan be improved.

Key words： Multi-terminal flexible DC droop control DC voltage small signal stability eigenvalue analysis

Received: 30 June 2020

PACS:

TM712

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	Wu Qi
	Deng Wei
	Tan Jianxin
	Sha Jitong
	Qin Xiaoliang
	Pei Wei

Cite this article:

Wu Qi,Deng Wei,Tan Jianxin等. Stability Analysis of Multi-Terminal DC System Based on Droop Control[J]. Transactions of China Electrotechnical Society, 2021, 36(zk2): 507-516.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.L90185 OR https://dgjsxb.ces-transaction.com/EN/Y2021/V36/Izk2/507

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