Research of Single-Phase Grounding Fault Location Based on Steady-State Abrupt Change of Phase Current

doi:10.16628/j.cnki.2095-8188.2022.11.009

Abstract

Abstract:

Most of the single-phase grounding fault location of the distribution network is realized by detecting and calculating the zero-sequence current,and the corresponding hardware equipment needs to be added.It is difficult to reconstruct in the area where the distribution automation has been realized.A small current single-phase grounding fault location method based on the analysis of three-phase phase current steady-state abrupt change is proposed.According to the absolute abrupt change of the three-phase current before and after the occurrence of the ground fault,the criterion is set to realize the location of the fault section.The MATLAB simulation results and engineering applications verify the feasibility of the method.The proposed method can be located at the remote side of the main station,which is simple in calculation and reduces the complexity of the grounding location of the distribution network.

Key words: distribution network, steady-state current, single-phase grounding, segment location, distribution automation

CLC Number:

TM76

ZHOU Wanpeng, GUO Yanhong, LUO Jialiang, ZHANG Limin, LI Biao, XIAO Shaohua. Research of Single-Phase Grounding Fault Location Based on Steady-State Abrupt Change of Phase Current[J]. LOW VOLTAGE APPARATUS, 2022, 0(11): 54-58.

Figures/Tables 7

References 10

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区段	判别结果				定位结果
区段	①	②	③	④	定位结果
①	+	-	-	-	①
②	-	+	-	-	②
③	-	-	+	-	③
④	-	-	+	+	④

位置	Δ'_AB	Δ_AB	Δ'_AC	Δ_AC	Δ_A	Δ_B	Δ_C	Δ₁	Δ₂	故障标记
①	23.94	27.91	32.26	34.28	36.12	32.15	34.1	2.99	3.00	-
②	0.01	0.01	0.02	0.04	0.03	0.01	0.01	0.01	0.02	-
③	0.01	16.22	0.02	16.24	16.13	0.08	0.13	16.22	16.12	+
④	0.01	0.26	0.02	0.39	0.43	0.16	0.06	0.27	0.32	-

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