Compensation Capacitor for Curved Part of GIS

JIN Yinxie; CUI Xiang; WU Hengtian

doi:10.13296/j.1001-1609.hva.2016.01.014

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Compensation Capacitor for Curved Part of GIS

更新时间：2025-04-26

- Compensation Capacitor for Curved Part of GIS
- High VoltageApparatus Vol. 52, Issue 1, Pages: 79-85(2016)
- 作者机构：
  
  1. 华北电力大学新能源电力系统国家重点实验室
  2. 金策工业综合大学电气工程系
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2016.01.014
  CLC： TM595
- Published：2016
- 稿件说明：
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[1]金银燮,崔翔,吴恒天.GIS拐弯段的补偿电容研究[J].高压电器,2016,52(01):79-85.

JIN Yinxie, CUI Xiang, WU Hengtian. Compensation Capacitor for Curved Part of GIS[J]. High voltageapparatus, 2016, 52(1): 79-85.
[1]金银燮,崔翔,吴恒天.GIS拐弯段的补偿电容研究[J].高压电器,2016,52(01):79-85. DOI： 10.13296/j.1001-1609.hva.2016.01.014.

JIN Yinxie, CUI Xiang, WU Hengtian. Compensation Capacitor for Curved Part of GIS[J]. High voltageapparatus, 2016, 52(1): 79-85. DOI： 10.13296/j.1001-1609.hva.2016.01.014.

摘要

在气体绝缘组合电器设备（GIS）中

隔离开关操作所产生的特快速瞬态过电压（VFTO）可能会对GIS内部绝缘结构造成影响。为了研究VFTO波形及其规律

建立GIS内部准确的计算模型非常重要。文中分别采用电磁场全波方法（时域有限差分法）和传输线方法

对GIS拐弯段即L型GIS进行了建模与计算。传输线方法由于其方法本身限制

无法考虑拐弯段电磁波畸变产生的影响

而电磁场全波方法从麦克斯韦方程出发

建立三维电磁场模型

能够考虑各种特殊结构情况下电磁场畸变情况。文中利用FDTD即时域有限差分法进行全波求解计算并和传输线方法进行对比

计算结果表明对同一段L型GIS

两种建模方法的却存在较大差异。为了修正传输线方法

通过比较两种方法的计算结果

在传输线模型中增加了L型GIS部分的补偿电容

来表示电磁波在L型GIS结构处的畸变影响。通过对1 000 k V及500 k V含有L型拐弯段的GIS管道计算

获得了两种电压等级情况下GIS拐弯段的最佳补偿电容值分别5 p F与7.5 p F。

Abstract

In gas-insulated substation（GIS）

very fast transient overvoltage（VFTO）generated by the switching operation has a great impact on the insulation structures in GIS. In order to study the VFTO waveform and calculate the magnitude of VFTO

an accurate GIS pipe model is necessary. In this paper

both the transmission line method and the full-wave electromagnetic field method（finite-difference time-domain（FDTD）method）are used to establish a model of L-type GIS

respectively. The transmission line method and the FDTD method are employed to calculate the full waveform of VFTO

while their results are quite different. To modify the transmission line method

a compensation capacitor is added to the L-type section of GIS in the transmission line model to reveal the distortion of electromagnetic wave at the section. Calculations of the L-type section of GIS pipe under the voltages of 1 000 k V and 500 k V show that the optimum capacitance of the compensation capacitor is 5 p F and 7.5 p F

respectively.

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