Analysis and Improvement of Active Arc Suppression Algorithm Considering Effect of Distribution Line Parameters

doi:10.11930/j.issn.1004-9649.201912001

Abstract

Abstract: Considering the influence of self impedance and phase-to-phase coupling of the distribution feeders, an analysis is made on the full-compensation zero-residual-current arc-suppression algorithms for the single-phase grounding faults of active inverters, and some ideas are proposed for their improvement. An equivalent injection current formula is derived for the active inverter based on full-compensation fault arc-suppression, which shows that the active arc-suppression injection current is determined by the faulted phase voltage and the zero-sequence input impedance at the fault position. Based on the analysis of the active-current and active-voltage arc-suppression algorithms, it is proposed to optimize active-current arc-suppression algorithm by correcting current flow through the arc-suppression coil, measuring the fault resistance and locating the fault section. The active voltage arc-suppression algorithm can be optimized by such methods as monitoring the load current and locating the single-phase grounding fault position. The results of this study can provide an important theoretical basis for improving the active arc suppression algorithms for single-phase grounding faults in the distribution networks.

Key words: distribution network, arc suppression coil, full compensation, zero residual current, active arc suppression

ZHU Zhanchun, WEN Shengxue, TANG Jinrui, RAN Ronghua, YUAN Chengqing, YANG Hualin, MOU Hua, DENG Congzhong. Analysis and Improvement of Active Arc Suppression Algorithm Considering Effect of Distribution Line Parameters[J]. Electric Power, 2021, 54(3): 149-158.

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URL: https://www.electricpower.com.cn/EN/10.11930/j.issn.1004-9649.201912001

https://www.electricpower.com.cn/EN/Y2021/V54/I3/149

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