Case Study on Abnormal Dielectric Loss of a ±800 kV DC Wall Bushing with Countermeasures

LI Weiguo; ZHANG Changhong; XIA Gulin; LU Wenhao; CHEN Wei

doi:10.13296/j.1001-1609.hva.2015.09.029

您当前的位置：

首页 >

文章列表页 >

Case Study on Abnormal Dielectric Loss of a ±800 kV DC Wall Bushing with Countermeasures

更新时间：2025-04-26

- Case Study on Abnormal Dielectric Loss of a ±800 kV DC Wall Bushing with Countermeasures
- High VoltageApparatus Vol. 51, Issue 9, Pages: 169-176(2015)
- 作者机构：
  
  南方电网超高压输电公司检修试验中心
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2015.09.029
  CLC： TM216.5
- Published：2015
- 稿件说明：
移动端阅览
[1]黎卫国,张长虹,夏谷林,卢文浩,陈蔚.±800kV直流穿墙套管介损超标原因分析及改进措施[J].高压电器,2015,51(09):169-176.

LI Weiguo, ZHANG Changhong, XIA Gulin, et al. Case Study on Abnormal Dielectric Loss of a ±800 kV DC Wall Bushing with Countermeasures[J]. High voltageapparatus, 2015, 51(9): 169-176.
[1]黎卫国,张长虹,夏谷林,卢文浩,陈蔚.±800kV直流穿墙套管介损超标原因分析及改进措施[J].高压电器,2015,51(09):169-176. DOI： 10.13296/j.1001-1609.hva.2015.09.029.

LI Weiguo, ZHANG Changhong, XIA Gulin, et al. Case Study on Abnormal Dielectric Loss of a ±800 kV DC Wall Bushing with Countermeasures[J]. High voltageapparatus, 2015, 51(9): 169-176. DOI： 10.13296/j.1001-1609.hva.2015.09.029.

摘要

针对±800 kV某换流站直流穿墙套管发生介损超标及气体组分异常现象

现场对该特高压穿墙套管进行多次高压试验和SF6气体组分分析

返厂对该特高压穿墙套管进行解体和一系列试验。结果表明:该穿墙套管内部放电点位于压紧环与室外套管金属导杆的连接处;套管内部发现大量以氟化铝为主的白色导电粉末;导电粉末是导致穿墙套管介损超标的主要原因。结合高压试验结果和套管缺陷提出修复该套管的办法

且对以后穿墙套管出厂监造、预试、检修等环节提出相关建议。

Abstract

The abnormal phenomena of dielectric loss and gas components of a DC wall bushing in a±800 kV converter station was analyzed. Several high-voltage tests and gas components analysis on the UHVDC wall bushing were conducted on site

and the bushing was disassembled and tested in the manufacturer. The results show that: 1)The discharge point is at the connection of the compressive ring and the metal guide bar of outdoor bushing; 2)Many white conductive powder mainly composed of Al F3 are found in the bushing; and 3)This conductive powder is the main cause of abnormal dielectric loss of the wall bushing. Some methods are presented for repairing the outdoor bushing

and suggestions are made for manufacture supervision

preventive test

and maintenance of wall bushings.

关键词

Keywords

references

Views

262

下载量

CSCD

Alert me when the article has been cited

提交

Tools

Publicity Resources

Study on Total Electric Field and Assessment Technology of UHVDC Lines Based on Joint Distribution of Wind Speed and Direction

Seismic-reduction Control and Vulnerability Analysis of Ultra-high Voltage DC Wall Bushing

Failure Analysis and Improvement on Driving Mechanism of Disconnector

Research on Influence of Temperature on Surface Flashover Characteristics of Epoxy Resin

Research Status and Development Trend of Distribution Cable Test Methods

Related Author

QIN Ziyi

CHEN Jiong

REN Maoxin

YIN Fan

FANG Yuanqi

XIAO Liqun

GAO Zihan

LIU Renpeng

Related Institution

Shanghai University of Electric Power

East China Branch, State Grid Corporation of China

College of Civil Engineering, Tongji University

China Electric Power Development Research Institute Co., Ltd.

State Key Laboratory of Disaster Reduction in Civil Engineering, Tongji University

⁰