Study on Propagation Characteristics of VFTO in Micro GIS

CHENG Lin; YANG Dingge; WANG Yanyi; YANG Changjian

doi:10.13296/j.1001-1609.hva.2026.07.009

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Study on Propagation Characteristics of VFTO in Micro GIS

Research & Analysis | 更新时间：2026-07-06

- Study on Propagation Characteristics of VFTO in Micro GIS
- High Voltage Apparatus Vol. 62, Issue 7, Pages: 95-100(2026)
- 作者机构：
  
  国网陕西省电力有限公司电力科学研究院，西安 710100
  西安交通大学电力设备与电气绝缘国家重点实验室，西安 710049
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2026.07.009
  CLC：
- Received：12 January 2026，
  
  Revised：2026-03-17，
  
  Published：16 July 2026
- 稿件说明：
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CHENG Lin, YANG Dingge, WANG Yanyi, et al. Study on Propagation Characteristics of VFTO in Micro GIS[J]. High Voltage Apparatus, 2026, 62(7): 95-100.
DOI：

CHENG Lin, YANG Dingge, WANG Yanyi, et al. Study on Propagation Characteristics of VFTO in Micro GIS[J]. High Voltage Apparatus, 2026, 62(7): 95-100. DOI： 10.13296/j.1001-1609.hva.2026.07.009.

摘要

气体绝缘金属封闭开关设备（gas-insulated metal-enclosed switchgear

GIS）在进行开关操作时会产生严重电磁干扰，为了减小特快速暂态过电压（very fast transient overvoltage

VFTO）等电磁暂态过程对二次设备的影响，文中搭建微缩GIS模拟实验平台，对VFTO在GIS中的传播特性进行研究。结果表明，线路末端VFTO的波形在空载情况下剧烈振荡，阻性负载下单调衰减，容性负载下阻尼性波动衰减。VFTO最大幅值与传输距离和负载性质有关，空载幅值沿传输线逐渐增大，阻性负载幅值沿传输线逐渐减小。脉冲前沿时间与传输距离呈正相关，在电容性负载的稳压作用下末端脉冲陡度急剧减小。VFTO的RMS均方根抖动对于阻性负载较为敏感，阻性负载时抖动幅度约为空载时的1/20。除此之外，GIS多线路负载相比于单线路对脉冲前沿的减缓作用更加明显，同时也能够降低脉冲的最大幅值。

Abstract

Gas insulated switchgear（GIS）substation can produce serious electromagnetic interference during switching operation. In order to reduce the influence of such electromagnetic transient processes as very fast transient overvoltage（VFTO）on secondary equipment

a micro GIS simulation experiment platform is set up in this paper so to study the propagation characteristics of VFTO in GIS. The results show that the waveform of VFTO at the end of the line oscillates violently under no-load condition

attenuates monotonically under resistive load and attenuates damping fluctuation under capacitive load. The maximum amplitude of VFTO is related to the transmission distance and load properties. The amplitude under no-load increases gradually along the transmission line

while the amplitude under resistive load decreases gradually along the transmission line. The pulse rise time is positively correlated with the transmission distance.Under the voltage regulation of the capacitive load

the steepness of the trailing pulse decreases sharply.The RMS jitter of VFTO is sensitive to resistive load

with the jitter amplitude under resistive load being approximately 1/20 of that under no-load conditions. In addition

compared with a single line

the multi-line load of GIS has a more obvious slowing effect on the pulse rise time

and it also reduces the maximum amplitude of the pulse.

关键词

Keywords

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