Research on Ultra-high-voltage GIS On-site Lightning Impulse Withstand Voltage Test Transient Over-voltage and Its Restraining Method

JI Binwei; GU Yonggang; LIU Zirui; GUO Anxiang; WANG Shuai; WEN Tao; ZHANG Qiaogen

doi:10.13296/j.1001-1609.hva.2018.02.013

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Research on Ultra-high-voltage GIS On-site Lightning Impulse Withstand Voltage Test Transient Over-voltage and Its Restraining Method

更新时间：2025-04-26

- Research on Ultra-high-voltage GIS On-site Lightning Impulse Withstand Voltage Test Transient Over-voltage and Its Restraining Method
- High VoltageApparatus Vol. 54, Issue 2, Pages: 76-83(2018)
- 作者机构：
  
  1. 国网陕西省电力公司
  2. 国网陕西省电力公司电力科学研究院
  3. 西安交通大学电力设备电气绝缘国家重点实验室
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2018.02.013
  CLC： TM595
- Published：2018
- 稿件说明：
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[1]季斌炜,谷永刚,刘子瑞,郭安祥,王帅,文韬,张乔根.特高压GIS现场冲击耐压试验暂态过电压及其抑制方法研究[J].高压电器,2018,54(02):76-83.

JI Binwei, GU Yonggang, LIU Zirui, et al. Research on Ultra-high-voltage GIS On-site Lightning Impulse Withstand Voltage Test Transient Over-voltage and Its Restraining Method[J]. High voltageapparatus, 2018, 54(2): 76-83.
[1]季斌炜,谷永刚,刘子瑞,郭安祥,王帅,文韬,张乔根.特高压GIS现场冲击耐压试验暂态过电压及其抑制方法研究[J].高压电器,2018,54(02):76-83. DOI： 10.13296/j.1001-1609.hva.2018.02.013.

JI Binwei, GU Yonggang, LIU Zirui, et al. Research on Ultra-high-voltage GIS On-site Lightning Impulse Withstand Voltage Test Transient Over-voltage and Its Restraining Method[J]. High voltageapparatus, 2018, 54(2): 76-83. DOI： 10.13296/j.1001-1609.hva.2018.02.013.

摘要

气体绝缘金属封闭式组合电器（gas insulated switchgear

GIS）在电力系统中应用广泛

GIS现场冲击耐压试验中因内部存在缺陷而发生SF6气隙击穿或绝缘子沿面闪络时

会导致某些节点出现高频振荡暂态过电压

对GIS内绝缘性能良好、不存在缺陷的绝缘子构成绝缘威胁。文中针对南京1 000 k V交流特高压变电站1 100 k V GIS现场雷电冲击耐压试验工程

利用ATP-EMTP电磁暂态分析软件对特高压GIS现场冲击耐压试验系统与故障电弧进行建模

分析了特高压GIS现场冲击耐压试验暂态过电压水平

并对过电压抑制方法进行了探究。研究结果表明:计算得到的放电过程电压波形与试验电压波形基本吻合

弧道电阻指数衰减模型能够准确模拟雷电冲击下GIS内的放电过程;放电引发的陡前沿电压波传播至被试GIS边缘节点时发生近似全反射

导致此类节点处出现幅值高于2 400 k V的高幅值过电压;参数取值为Cr=800 p F、Rr=100Ω的弱阻尼暂态过电压抑制器能够有效抑制2台断路器串联与接入3台断路器方式下空载套管顶端的高幅值过电压

且对未发生放电时的雷电冲击试验电压影响极小

具备应用于现场试验的可行性。

Abstract

Gas insulated switchgear（GIS）has been widely used in electrical power system.During the on-site light-ning impulse withstand voltage test of GIS

when the underproof GIS discharges

high-amplitude oscillating over-voltage will take place

which may threaten the intact equipments. In this paper

we developed a ATP-EMTP tran-sient analyzing model of ultra-high-voltage GIS on-site lightning impulse withstand voltage test system and fault arc.The over-voltage amplitude and its restraining method has been investigated. The results show that the calculatedvoltage waveforms matches well with the test waveforms

indicating that the fault arc model can simulate the dis-charging process accurately. The fringe nodes in the test system will cause the total reflection of transient voltage

making the over-voltage amplitude higher than 2 400 k V. The over-voltage amplitude on top of the no-load bushingcan be restrained after the introduction of the low-damping transient voltage restrainer. The parameter Cr=800 p F、Rr=100 Ω is suggested

which can effectively make the oscillating voltage lower than 2 400 k V.

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