Experimental Study on Suppressing VFTO in 550 kV GIS by Ferrite Beads

GAO Fanfu; TAN Xiangyu; LIANG Zhirui

doi:10.13296/j.1001-1609.hva.2018.10.022

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Experimental Study on Suppressing VFTO in 550 kV GIS by Ferrite Beads

更新时间：2025-04-26

- Experimental Study on Suppressing VFTO in 550 kV GIS by Ferrite Beads
- High VoltageApparatus Vol. 54, Issue 10, Pages: 132-136+144(2018)
- 作者机构：
  
  1. 华北电力大学电力系
  2. 华北电力大学云南电网有限责任公司研究生工作站
  3. 云南电网有限责任公司电力科学研究院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2018.10.022
  CLC： TM595
- Published：2018
- 稿件说明：
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[1]高凡夫,谭向宇,梁志瑞.铁氧体磁环抑制550 kV GIS中的特快速暂态过电压的试验研究[J].高压电器,2018,54(10):132-136+144.

GAO Fanfu, TAN Xiangyu, LIANG Zhirui. Experimental Study on Suppressing VFTO in 550 kV GIS by Ferrite Beads[J]. High voltageapparatus, 2018, 54(10): 132-136+144.
[1]高凡夫,谭向宇,梁志瑞.铁氧体磁环抑制550 kV GIS中的特快速暂态过电压的试验研究[J].高压电器,2018,54(10):132-136+144. DOI： 10.13296/j.1001-1609.hva.2018.10.022.

GAO Fanfu, TAN Xiangyu, LIANG Zhirui. Experimental Study on Suppressing VFTO in 550 kV GIS by Ferrite Beads[J]. High voltageapparatus, 2018, 54(10): 132-136+144. DOI： 10.13296/j.1001-1609.hva.2018.10.022.

摘要

超高压气体绝缘开关设备（简称GIS）操作隔离开关过程中产生的特快速暂态过电压（简称VFTO）严重威胁GIS和相邻设备的绝缘安全

故文中利用真型550 kV GIS试验平台开展铁氧体磁环抑制VFTO的试验研究。首先介绍了关于此课题的国内外研究背景。然后阐述了磁环抑制VFTO的工作原理

详细分析了其特性

并根据实际情况选取铁氧体磁性材料制成的磁环。通过2 MV Marx发生器施加到GIS母线上的电压行波模拟隔离开关切合短母线产生的VFTO

分别在无磁环、25 cm铁氧体磁环串条件下进行系列试验。最后试验数据的整理和分析表明

铁氧体磁环对VFTO的幅值和陡度均有抑制作用

而且在磁化曲线的线性区

抑制效果随施加电压的升高而加强

但进入曲线饱和区后

磁环的抑制作用显著下降。试验结果证实了用铁氧体磁环抑制超高压等级的GIS中VFTO也具有可行性。

Abstract

The very fast transient overvoltage（VFTO）caused by operation of disconnecting switch in extra high volt-age gas insulated switchgears（GIS）has become serious threat to insulation safety of GIS and adjacent equipment

so thisstudy conducted series of experiments about suppressing VFTO by ferrite beads in 550 kV GIS. Firstly this paper in-troduced the research background of this topic at home and abroad. Afterwards

it described the working principle ofhow to suppress VFTO by ferrite beads and analyzed the characteristics of the magnetic ring in detail

furthermore

ferrite magnetic material was selected according to the actual needs. Using the output voltage of 2 MV Marx generatorto simulate the VFTO which caused by the operation of disconnecting switch in GIS

and series of experiments werecarried out in absence of magnetic ring

25 cm ferrite ring on conditions respectively. At last

the comparative analy-sis of the experimental data showed that ferrite beads took effect in suppressing the amplitude and steepness of VF-TO

and the suppression effect was enhanced with the increase of the applied voltage while in the linear region of themagnetization curve

but the suppression effect significantly decreased when in the saturation region of magnetiza-tion curve. This study verifies that ferrite beads are feasible to suppress the VFTO of ultrahigh-voltage GIS.

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