Study on Grounding Mode of Neutral Point through Arc Suppression Coil in Parallel with Median Resistance

doi:10.11985/2021.04.020

Abstract

Abstract:

The traditional neutral grounding method is easy to lead to over-compensation and under-compensation, and the location error of grounding fault is large. A new neutral grounding method is designed to solve the problem of over-compensation and under-compensation of fault current by using active arc suppression technique and parallel connection of median resistance, single-phase-to-ground fault location based on the weighted multi-source shortest path algorithm (Floyd algorithm) can be used for fault location of multiple transmission lines. Finally, by comparing the maximum fault current curve and error analysis curve of three different grounding modes, it is found that the fault current of the proposed method is the most stable, and the fault current is only between 15 A and 20 A, the maximum error rate of fault location is less than 3%, which proves the superiority of the grounding mode and the feasibility of the design.

Key words: Active arc suppression technology, grounding mode of parallel median resistance, Floyd fault location algorithm

CLC Number:

TM475

YE Yuanbo, WANG Shenghe, HUANG Taigui, WEI Lixin. Study on Grounding Mode of Neutral Point through Arc Suppression Coil in Parallel with Median Resistance[J]. Journal of Electrical Engineering, 2021, 16(4): 159-165.

Figures/Tables 7

References 24

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接地方式	故障节点	稳定性/dB	误差(%)
本研究	单相接地	1.0	0.011
文献1	单相接地	2.5	0.124
文献2	单相接地	3.6	0.086

故障点	故障区间	Floyd故障点	Floyd定位距离/km
F1	1~3	L=403.33 m	0.78
F2	2~5	单相接地故障	12.63
F3	3~6	母线2接地故障	25.32
F4	4~8	母线2接地故障	21.35