Investigation of Repeated Breakdown Process During Very-fast Transient Overvoltage Test of Overall Switching Process of Disconnector in GIS

ZHAO Lin; YE Liya; ZHAN Huamao; LI Zhibing; DUAN Shaofeng

doi:10.13296/j.1001-1609.hva.2020.11.021

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Investigation of Repeated Breakdown Process During Very-fast Transient Overvoltage Test of Overall Switching Process of Disconnector in GIS

更新时间：2025-04-26

- Investigation of Repeated Breakdown Process During Very-fast Transient Overvoltage Test of Overall Switching Process of Disconnector in GIS
- High VoltageApparatus Vol. 56, Issue 11, Pages: 130-138(2020)
- 作者机构：
  
  1. 国网浙江省电力有限公司电力科学研究院
  2. 国网浙江省电力有限公司培训中心
  3. 华北电力大学
  4. 中国电力科学研究院
  5. 广东电网有限责任公司梅州供电局
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2020.11.021
  CLC： TM63;TM564.1
- Published：2020
- 稿件说明：
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[1]赵琳,叶丽雅,詹花茂,李志兵,段绍峰.GIS隔离开关特快速瞬态过电压试验重复击穿全过程仿真模型研究[J].高压电器,2020,56(11):130-138.

ZHAO Lin, YE Liya, ZHAN Huamao, et al. Investigation of Repeated Breakdown Process During Very-fast Transient Overvoltage Test of Overall Switching Process of Disconnector in GIS[J]. High voltageapparatus, 2020, 56(11): 130-138.
[1]赵琳,叶丽雅,詹花茂,李志兵,段绍峰.GIS隔离开关特快速瞬态过电压试验重复击穿全过程仿真模型研究[J].高压电器,2020,56(11):130-138. DOI： 10.13296/j.1001-1609.hva.2020.11.021.

ZHAO Lin, YE Liya, ZHAN Huamao, et al. Investigation of Repeated Breakdown Process During Very-fast Transient Overvoltage Test of Overall Switching Process of Disconnector in GIS[J]. High voltageapparatus, 2020, 56(11): 130-138. DOI： 10.13296/j.1001-1609.hva.2020.11.021.

摘要

现有特快速瞬态过电压（VFTO）重复击穿仿真模型未考虑隔离开关断口击穿特性

以及弧阻模型不能充分反映电弧动态变化

需开展试验研究来获取。首先

建立252 kV GIS试验平台

进行隔离开关分合闸操作

获取断口击穿特性。对断口进行交直流联合击穿试验研究

提出重复击穿电压曲线试验方法。其次

考虑电流峰值、弧长以及气压等影响因素

结合特快速瞬态过电流（VFTC）的电弧熄弧规律

提出GIS隔离开关双指数型高频电弧电阻模型。之后

基于重复击穿电压曲线以及弧阻模型

建立252 kV GIS回路VFTO全过程仿真模型

采用自适应变步长方法交替进行工频稳态和高频暂态过程计算

实现VFTO的全过程高效仿真

通过试验波形对比验证仿真模型的准确性。最后

采用武汉交流特高压试验基地GIS试验回路进行VFTO全过程仿真

验证了所提仿真方法的适用性。

Abstract

The existing very-fast transient overvoltage（VFTO）repeated breakdown simulation model does not consider the breakdown characteristics of the disconnector contact gap

and the arc resistance model cannot fully reflect the dynamic changes of the arc.Therefore

a 252 kV GIS test platform was established in this study to obtain the breakdown characteristics during switching on/off a disconnector.The AC/DC combined discharge of the contact gap was tested

and a test method of repeated discharge voltage curve was proposed.Considering such influence factors as current peak value

arc length and air pressure

as well as the arc extinction law of very-fast transient over-current（VFTC）

a double-exponential high-frequency arc resistance model was proposed.Then

based on the repeated breakdown voltage curve and the arc resistance model

the whole-process VFTO simulation model of 252 kV GIS loop was established.Further

the adaptive variable step method was applied to alternate calculations of the power-frequency steady-state and high-frequency transient process to obtain an efficient simulation of the whole-process VFTO.The accuracy of the simulation model was verified by comparing test waveforms.In addition

the GIS test circuit in Wuhan AC ultra-high voltage（UHV） GIS test base was used to simulate the entire process of VFTO

thus the applicability of the proposed simulation method was verified.

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