Simulation Study on the Influence of Forced Convection Heat Dissipation on Temperature Rise of Switch-gear

WANG Zengbin; WANG Rui; YAO Congwei; MA Xinyou; SUN Shuai; WANG Lijun

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Simulation Study on the Influence of Forced Convection Heat Dissipation on Temperature Rise of Switch-gear

更新时间：2025-12-08

- Simulation Study on the Influence of Forced Convection Heat Dissipation on Temperature Rise of Switch-gear
- Vol. 47, Issue 3, Pages: 1064-1074(2021)
- 作者机构：
  
  1. 广东电网有限公司电力科学研究院
  2. 广东省电力装备可靠性企业重点实验室
  3. 西安交通大学电力设备电气绝缘国家重点实验室
- 作者简介：
- 基金信息：
- DOI：
  CLC：
- Published Online：31 March 2021，
  
  Published：2021
- 稿件说明：
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WANG Zengbin, WANG Rui, YAO Congwei, et al. Simulation Study on the Influence of Forced Convection Heat Dissipation on Temperature Rise of Switch-gear[J]. 2021, 47(3): 1064-1074.
DOI：

WANG Zengbin, WANG Rui, YAO Congwei, et al. Simulation Study on the Influence of Forced Convection Heat Dissipation on Temperature Rise of Switch-gear[J]. 2021, 47(3): 1064-1074. DOI：

摘要

在自然对流散热条件下

大电流开关柜难以达到温升标准

因此开关柜通常采用强制对流散热。为研究不同强制对流条件对开关柜内温升的影响规律

建立了电磁-传热-流体多物理场耦合模型

并通过实验验证了仿真模型的合理性。进一步地

设置了不同的风机组数和风机故障状态

形成了不同的柜内强制对流条件

仿真分析了相应条件下的开关柜内温升分布情况。仿真研究发现:无强制对流散热时

开关柜温升无法满足GB/T 11022—2011要求

且最高温升部位均位于真空灭弧室的动静触头连接位置;电缆室下侧风机与断路器室下侧风机对柜内不同部件的散热具有重要作用

且作用相对独立;与单组风机相比

装设2组及3组风机时

散热能力显著提高

但2组和3组风机情况下的温升分布差异不大

设置2组风机在保证散热效果的同时

具有更好的节能效果。

Abstract

Because the large-current switch-gear can hardly reach the standard on temperature rise under the natural convection heat dissipation condition

forced convection heat dissipation is applied. In order to study the influence of the forced convection on the temperature rise

the temperature rise distribution in the switch-gear is analyzed by establishing a multi-physics model

and the switch-gear simulation model is verified by experiments. Different fan number and fan faults are set to study the temperature distribution in switch-gear with different heat dissipation conditions. It is found that the temperature rise exceeds the requirements of GB/T 11022—2011 without forced convection heat dissipation

and the highest temperature position locates at joint position between moving and fixed contacts. The fans at cable chamber and breaker chamber are important for lowering the temperature

and their function is proved to be independent. Compared with a single fan

two or three sets of fans perform more effective heat dissipation effect. However

the heat dissipation effect is similar when applying two or three set of fans. Therefore

applying two sets of fans in switch-gear is more energy-efficient.

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