Thermal Stability Analysis of 550 kV High-voltage Disconnector

WU Tao; YU Hai-tao; DAI Yong-zheng; WANG Peng; ZHANG Guang-lai

doi:10.13296/j.1001-1609.hva.2013.09.024

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Thermal Stability Analysis of 550 kV High-voltage Disconnector

更新时间：2025-04-26

- Thermal Stability Analysis of 550 kV High-voltage Disconnector
- High VoltageApparatus Vol. 49, Issue 9, Pages: 134-141(2013)
- 作者机构：
  
  1. 东南大学
  2. 国网电科院江苏泰事达电气有限公司
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2013.09.024
  CLC： TM564.1
- Published：2013
- 稿件说明：
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[1]吴涛,余海涛,戴永正,王鹏,张光来.550kV高压隔离开关热稳定性分析[J].高压电器,2013,49(09):134-141.

WU Tao, YU Hai-tao, DAI Yong-zheng, et al. Thermal Stability Analysis of 550 kV High-voltage Disconnector[J]. High voltageapparatus, 2013, 49(9): 134-141.
[1]吴涛,余海涛,戴永正,王鹏,张光来.550kV高压隔离开关热稳定性分析[J].高压电器,2013,49(09):134-141. DOI： 10.13296/j.1001-1609.hva.2013.09.024.

WU Tao, YU Hai-tao, DAI Yong-zheng, et al. Thermal Stability Analysis of 550 kV High-voltage Disconnector[J]. High voltageapparatus, 2013, 49(9): 134-141. DOI： 10.13296/j.1001-1609.hva.2013.09.024.

摘要

550 kV高压隔离开关在实际运行中由于电阻损耗发热而温度升高

甚至会超过允许温升

而影响其工作性能。尤其是隔离开关的接触电阻

直接影响其热稳定性

严重时可能引起烧瓷粘连事故。为了保证高压隔离开关工作的安全性和稳定性

建立了三维有限元分析模型

计算了550 kV高压隔离开关的损耗

得到了电流分配情况。通过瞬态热分析

讨论了隔离开关在65 kA/3 s下的热稳定性

并且研究了接触电阻、接触面积及电流对动静触头接触点温升的影响。计算结果为产品试验提供了参考

分析方法为产品设计提供理论指导。

Abstract

The 550 kV high-voltage disconnector produces heat in operation because of its resistance to make its temperature rising

which affects its working performance.Especially

the contact resistance of the disconnector will reduces its thermal stability

and even causes adhesion accident.In this paper

a 3-D finite element analysis model of the disconnector is established.The loss of energy and current distribution are calculated with the model.According to transient thermal analysis

the thermal stability of the disconnector at 65 kA/3 s is discussed

and the influences of the contact resistance

the contact area

and the current on temperature rise of the contact points are investigated.This study may provide a reference for product test and design of the disconnector.

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