Partial Discharge and Motion Characteristics of Linear Metal Particles in SF6 Under AC Superimposed Lightning Impulse Voltage

被引：0

作者：

Han, Xutao ^{[1
]}

Wu, Xutao ^{[2
]}

Zhao, Yingying ^{[3
]}

Niu, Bo ^{[2
]}

Wang, Haotian ^{[1
]}

Li, Junhao ^{[1
]}

机构：

[1] State Key Laboratory of Electrical Insulation and Power Equipment, Xi’an Jiaotong University, Xi’an

[2] Electric Power Science Research Institute, State Grid Ningxia Electric Power Co., Ltd., Yinchuan

[3] State Grid Shanghai Electric Power Co., Shanghai

来源：

Gaodianya Jishu/High Voltage Engineering | 2024年 / 50卷 / 12期

关键词：

AC superimposed lightning impulse; gas insulated switchgear; linear metal particles; motion characteristics; partial discharge;

D O I：

10.13336/j.1003-6520.hve.20232109

中图分类号：

学科分类号：

摘要：

GIS equipment often suffers from lightning overvoltage during operation, and the equipment actually bears the effect of AC superimposed lightning impulse voltage. At this time, high amplitude impulse voltage excites linear metal particles to start moving and generate partial discharge, seriously threatening the safe operation of GIS equipment. Therefore, this paper establishes an AC superimposed lightning impulse voltage test system, which combines partial discharge measurement and optical image observation methods to study the partial discharge characteristics and motion behavior of linear metal particles in SF6 gas under AC superimposed lightning impulse voltage. Combined the the partial discharge characteristics and motion behavior of linear metal particles, the motion mechanism and partial discharge mechanism of linear metal particles under AC superimposed lightning impulse voltage are analyzed. The results show that the superimposed voltage can stimulate the movement of linear metal particles; however, after the action of lightning impulse voltage, there is no obvious partial discharge signal immediately. Instead, a continuous partial discharge begins to occur after a delay time, which is related to the physical size and number of the defect. In addition, jumping motion through the electrode is more likely to occur during the subsequent continuous discharge process. The research work in this paper is conducive to a deeper understanding of the motion characteristics of metal particles in actual equipment and the process of causing partial discharge, and has guiding significance for equipment operation and maintenance analysis and equipment manufacturing improvement. © 2024 Science Press. All rights reserved.

引用

页码：5406 / 5414

页数：8

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