GIS双断口隔离开关不停电试验电场分布及击穿特性

doi:10.11930/j.issn.1004-9649.202305009

中国电力 ›› 2023, Vol. 56 ›› Issue (9): 168-177.DOI: 10.11930/j.issn.1004-9649.202305009

GIS双断口隔离开关不停电试验电场分布及击穿特性

董子凡¹, 任劼帅¹, 殷建刚², 陈隽¹, 文雅钦¹, 李劲彬¹

1. 国网湖北省电力有限公司电力科学研究院，湖北武汉 430077;
2. 国网湖北省电力有限公司，湖北武汉 430077

收稿日期:2023-05-04 修回日期:2023-08-03 发布日期:2023-09-20
作者简介:董子凡(1997-),男,硕士,助理工程师,从事高压电气设备及数字孪生研究,E-mail:zifan_dong@qq.com;任劼帅(1989-),男,通信作者,博士,高级工程师,从事高压电气设备及数字孪生研究,E-mail:591667076@qq.com
基金资助:
国家电网有限公司科技项目（500-202222119A-1-1-ZN）

Research on Electric Field Distribution and Breakdown Characteristics of GIS Double-fracture Disconnect Switch under Non-outage Experiment

DONG Zifan¹, REN Jieshuai¹, YIN Jiangang², CHEN Jun¹, WEN Yaqin¹, LI Jinbin¹

1. State Grid Hubei Electric Power Co., Ltd. Electric Power Research Institute, Wuhan 430077, China;
2. State Grid Hubei Electric Power Co., Ltd., Wuhan 430077, China

Received:2023-05-04 Revised:2023-08-03 Published:2023-09-20
Supported by:
This work is supported by Science and Technology Project of SGCC (No.500-202222119A-1-1-ZN).

摘要/Abstract

摘要： 共气室结构的双断口隔离开关（double-fracture disconnect switch，DDS）在不停电耐压试验过程中存在因试验侧断口击穿而影响运行侧断口绝缘性能的风险，在设计阶段需要对其电场分布和击穿特性进行研究。为此，以新研发的110 kV三相共箱式GIS双断口隔离开关为例，采用有限元方法对电场进行仿真分析，得到其在现场不停电工频耐压试验中的内部电场强度分布。根据电场的计算结果，采用基于汤逊放电理论的击穿判据，研究不停电试验中两个断口的击穿特性，证明了在DDS现场不停电交流耐压试验过程中，试验侧断口击穿不会对运行侧的绝缘性能造成影响。研究结果可以为在运的DDS二期扩建时的不停电扩建与现场绝缘试验工作提供安全保证的理论支撑，也为未来新型DDS设备研发过程中的绝缘校核提供了更加翔实的理论依据。

关键词: 双断口隔离开关, 不停电扩建, 有限元仿真, 汤逊放电理论, 击穿特性

Abstract: Due to the breakdown of the test-side fracture during the non-outage voltage-withstand test, the double-fracture disconnect switch (DDS) with a common chamber structure has been exposed to the risk of affecting the insulation performance of the operating-side fracture. Therefore, it is necessary to study the electric field distribution and breakdown characteristics of the DSS during the design phase. In this paper, the newly developed 110 kV three-phase common box type GIS DDS was taken as an example. The finite element method was employed to simulate the electric field, as well as to obtain the internal electric field strength distribution during non-outage voltage-withstand test at the actual site. Based on the electric field calculation results and the breakdown criteria deduced by Thomson discharge theory, the breakdown characteristics of the two fractures were studied during non-outage voltage-withstand test. It was proven that the breakdown of the test-side fracture would not affect the insulation performance of the operating-side in the non-outage voltage-withstand testing process of the DDS. The results provide theoretical support for non-outage expansion and on-site insulation test during the second-phase expansion, and also provide a more detailed theoretical basis for insulation verification in the future development of the next-generation DDS equipment.

Key words: double-fracture disconnect switch, non-outage expansion, finite element simulation, thomson discharge theory, breakdown characteristic

董子凡, 任劼帅, 殷建刚, 陈隽, 文雅钦, 李劲彬. GIS双断口隔离开关不停电试验电场分布及击穿特性[J]. 中国电力, 2023, 56(9): 168-177.

DONG Zifan, REN Jieshuai, YIN Jiangang, CHEN Jun, WEN Yaqin, LI Jinbin. Research on Electric Field Distribution and Breakdown Characteristics of GIS Double-fracture Disconnect Switch under Non-outage Experiment[J]. Electric Power, 2023, 56(9): 168-177.

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https://www.electricpower.com.cn/CN/Y2023/V56/I9/168

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GIS双断口隔离开关不停电试验电场分布及击穿特性

Research on Electric Field Distribution and Breakdown Characteristics of GIS Double-fracture Disconnect Switch under Non-outage Experiment

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GIS双断口隔离开关不停电试验电场分布及击穿特性

Research on Electric Field Distribution and Breakdown Characteristics of GIS Double-fracture Disconnect Switch under Non-outage Experiment

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