考虑中性点电阻接地的交直流配电网极地故障稳态机理建模

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Abstract When the valve-side commutation transformer is grounded through a resistor in the AC/DC hybrid distribution network, the mechanism of the polar fault is still unclear. This paper proposes a steady-state model for the pole fault of AC/DC distribution network considering the valve-side commutation transformer grounding through resistance. Firstly, according to conduction conditions of a full-bridge inverter, the system operation state after a pole-to-ground fault is analyzed and screened. For each possible system operation state, a multivariate first-order linear differential equation system of the three-phase current is deduced. State rotation segmentation analysis method can be found through numerical simulation thereon. Through an experimental test conducted on the Matlab/Simulink, the validity of the proposed model and solving method is verified, thus providing a theoretical basis for the post-fault steady-state analysis.

Key words： AC/DC hybrid distribution network IGBT blocked diode conduction state AC line operating state switching

Received: 02 June 2022

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	Articles by authors
	GAO Bin
	ZHAO Jiaqi
	WANG Yue

Cite this article:

GAO Bin,ZHAO Jiaqi,WANG Yue. Steady-state analysis model of single polar ground fault of a hybrid AC/DC distribution system with resistance grounded system[J]. Electrical Engineering, 2022, 23(10): 18-26.

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http://dqjs.cesmedia.cn/EN/Y2022/V23/I10/18

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