Experimental and Simulation Study on the Influence of Frequency on Temperature Rise Characteristics of Medium Voltage Switchgear Cabinet

WANG Bo; ZHANG Min; HUANG Jinlin; LI Xianzhe; WANG Wei; WANG Lijun; LU Wenjian; FAN Qin

doi:10.13296/j.1001-1609.hva.2026.07.016

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Experimental and Simulation Study on the Influence of Frequency on Temperature Rise Characteristics of Medium Voltage Switchgear Cabinet

Research & Analysis | 更新时间：2026-07-06

- Experimental and Simulation Study on the Influence of Frequency on Temperature Rise Characteristics of Medium Voltage Switchgear Cabinet
- High Voltage Apparatus Vol. 62, Issue 7, Pages: 156-165(2026)
- 作者机构：
  
  西安高压电器研究院股份有限公司，西安 710077
  西安交通大学电工材料电气绝缘国家重点实验室，西安 710049
- 作者简介：
- 基金信息：
- DOI：10.13296/j.1001-1609.hva.2026.07.016
  CLC：
- Received：01 January 2026，
  
  Revised：2026-03-28，
  
  Published：16 July 2026
- 稿件说明：
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WANG Bo, ZHANG Min, HUANG Jinlin, et al. Experimental and Simulation Study on the Influence of Frequency on Temperature Rise Characteristics of Medium Voltage Switchgear Cabinet[J]. High Voltage Apparatus, 2026, 62(7): 156-165.
DOI：

WANG Bo, ZHANG Min, HUANG Jinlin, et al. Experimental and Simulation Study on the Influence of Frequency on Temperature Rise Characteristics of Medium Voltage Switchgear Cabinet[J]. High Voltage Apparatus, 2026, 62(7): 156-165. DOI： 10.13296/j.1001-1609.hva.2026.07.016.

摘要

不同频率运行工况下，频率显著影响了中压开关柜的电磁场分布与温升特性，仅依据工频标准难以准确评估不同频率下的设备运行状态及载流能力。为探究频率变化对开关柜的电磁—热的影响规律并量化其载流能力，文中以KYN44-12（Z）开关柜为研究对象，搭建了基于交流—直流—交流的宽频域温升试验平台，建立了电磁—流体—温度场耦合模型。在此基础上，开展了16.7～60 Hz频率下的温升试验与仿真研究，验证了模型的准确性。研究发现，频率变化显著影响导体电流的趋肤效应与邻近效应强度，导电回路的电磁损耗与频率呈线性正相关，导致开关柜温升随频率呈现出低频降低、高频升高的特点。针对这一问题，文中构建了频率—温升折算系数的经验公式，为不同频率运行工况下开关柜的热特性评估提供了理论依据。测试人员在不具备宽频域试验设备的条件下，可依靠工频50 Hz的温升试验数据预测开关柜在实际运行频率下的温升值。

Abstract

Under different frequency operating conditions

the frequency significantly affects the electromagnetic field distribution and and temperature rise characteristics of medium voltage switchgear cabinet. It is dfficult to accurately evaluate the equipment operating status and current-carrying capacity at different frequencies based solely on power frequency standards. To investigate the influence of frequecy variation on the electromagnetic-thermal characteristics of the switchgear cabinet and to quantify its current-carrying capacity

in this paper typeKYN44-12（Z） switchgear cabinet is taken as the research object

a wide-frequency-domain temperature rise test platform based on AC-DC-ACconversion

as well as an electromagnetic-fluid-thermal coupled model are set up. On this basis

the temperature test and simulation study are performed at frequency from 16.7 Hz to 60 Hz so to verify the accuracy of the model. It is found by the research that frequency variation significantly affects skin effect and proximity effect strength. The electromagnetic loss exhibits a positive linear correlation with frequency

causing temperature rise of the switchgear cabinet to decrease at low frequencies and increase at high frequencies. To address this issue

an empirical formula for the frequency-temperature rise conversion coefficient is set up in this paper

providing a theoretical basis for th thermal characteristic evaluation of switchgear cabinet under different freuqency operating conditions. The test personnel

in the absence of frequency conversion testing equipment

can predict the temperature rise of switchgear cabinet at actual operating frequency based on 50 Hz temperature rise test data.

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references

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