考虑故障限流的下垂控制型逆变器暂态控制策略

doi:10.19595/j.cnki.1000-6753.tces.211118

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Abstract The droop-controlled inverter can provide voltage and frequency support for the power grid, and its transient stability is important. However, the stability of power angle and fault current affects the safe operation of the droop-controlled inverter under fault conditions. In this paper, the transient characteristics of the droop-controlled inverter are analyzed, and the influence of current limiter and Q-U loop on the transient characteristics of the inverter is described in detail. Accordingly, this paper proposes a transient control method for the droop-controlled inverter which takes into account both fault current limitation and power angle stability. The proposed method considers the variation of the grid voltage and the output voltage of the inverter during the fault period and realizes the power angle stability of the inverter by adjusting the active power reference. In addition, the fault current can be effectively suppressed by the optimal control of the Q-U control loop. Finally, the effectiveness of the proposed method is verified by simulation and experiment.

Key words： Droop-controlled inverter transient stability analysis fault current limitation transient control strategy

Received: 21 July 2021

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TM464

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	Articles by authors
	Ge Pingjuan
	Xiao Fan
	Tu Chunming
	Chen Leqi
	Zhou Da

Cite this article:

Ge Pingjuan,Xiao Fan,Tu Chunming等. Transient Control Strategy of Droop-Controlled Inverter Considering Fault Current Limitation[J]. Transactions of China Electrotechnical Society, 2022, 37(14): 3676-3687.

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https://dgjsxb.ces-transaction.com/EN/10.19595/j.cnki.1000-6753.tces.211118 OR https://dgjsxb.ces-transaction.com/EN/Y2022/V37/I14/3676

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