Dealing with a Grading Ring Fracture Failure

QIN Rui; GAO Jian; YAN Li; YANG Ping; YUAN Fang

doi:10.13296/j.1001-1609.hva.2014.07.021

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Dealing with a Grading Ring Fracture Failure

更新时间：2025-04-26

- Dealing with a Grading Ring Fracture Failure
- High VoltageApparatus Vol. 50, Issue 7, Pages: 117-122(2014)
- 作者机构：
  
  国网甘肃省电力公司电力科学研究院
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2014.07.021
  CLC： TM732
- Published：2014
- 稿件说明：
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[1]秦睿,高健,严丽,杨萍,袁芳.一起均压环断裂故障的分析与处理[J].高压电器,2014,50(07):117-122.

QIN Rui, GAO Jian, YAN Li, et al. Dealing with a Grading Ring Fracture Failure[J]. High voltageapparatus, 2014, 50(7): 117-122.
[1]秦睿,高健,严丽,杨萍,袁芳.一起均压环断裂故障的分析与处理[J].高压电器,2014,50(07):117-122. DOI： 10.13296/j.1001-1609.hva.2014.07.021.

QIN Rui, GAO Jian, YAN Li, et al. Dealing with a Grading Ring Fracture Failure[J]. High voltageapparatus, 2014, 50(7): 117-122. DOI： 10.13296/j.1001-1609.hva.2014.07.021.

摘要

甘肃河西新能源基地大负荷电力的输送主要依赖超高压输变电工程

而超高压电气设备对外绝缘水平和电压分布要求高

所以大多数设备对地距离高且加装均压环。甘肃河西750 kV输变电工程处于高风载地区

投运以来已发生多起750 kV主变高压侧套管、避雷器、支柱绝缘子和330 kV隔离开关等设备均压环断裂的故障。为保障甘肃风电能够安全稳定的送出

结合甘肃电网的实际情况

笔者针对某330 kV变电站隔离开关均压环断裂的原因进行了全面分析

提出了改进均压环结构的几种方案并进行了试验验证

最后从设计、结构、加工工艺和运行维护等方面提出了增加不锈钢板、支撑筋及不锈钢抱箍等具体防范解决措施。

Abstract

The Gansu Hexi 750 kV power transmission project

which is located in heavy wind-load area

has suffered some grading ring fracture failures on the 750 kV main transformer high-voltage side

surge arresters

post insulators

330 kV isolating switches

and so on. In this paper

the causes of grading ring fracture on a 330 kV substation isolating switch is analyzed comprehensively on account of the actual situation of Gansu power grid

and several schemes are proposed for improving the grading ring structure. Experiments are conducted to verify these schemes. Preventive solutions to the fracture problem are hence put forward concerning design

structure

processing technology

operation

and maintenance

such as increasing stainless steel plate

stainless steel hoop and supporting tendons.

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