可控换相换流器电阻-散热器电热耦合仿真分析  

Simulation Analysis of Electrothermal Coupling for Resistor-Heatsink of Controllable Line Commutated Converter

作　　者：闫全全 李雨珺 冷超 薛楚亮 朱正一 江飞 刘亚坤[2] YAN Quan-quan;LI Yu-jun;LENG Chao;XUE Chu-liang;ZHU Zheng-yi;JIANG Fei;LIU Ya-kun(State Grid Shanghai Electric Power Company Ultra-High Voltage Branch,Shanghai 200240,China;Department of Electrical Engineering,Shanghai Jiao Tong University,Shanghai 200240,China)

机构地区：[1]国网上海市电力公司超高压分公司,上海200240 [2]上海交通大学电气工程系,上海200240

出　　处：《电工电气》2025年第2期19-23,37,共6页Electrotechnics Electric

基　　金：国家电网公司科学技术项目(SGSHCG00ZSJS23106487)。

摘　　要：可控换相换流器(CLCC)是一种有望解决多馈入直流系统连续闭锁问题的新型电力电子装置,其关键组件电阻-散热器的性能影响温度分布和器件的长期稳定。针对CLCC电阻-散热器,利用COMSOL软件建立了三维电热场耦合计算模型,并基于有限元方法对不同幅值恒压电势和正弦电势输入条件下的温度分布规律和散热效果展开了分析。结果表明,短时冲击下,CLCC电阻-散热器的温升集中在电阻区域,温升幅值与所承受电压幅值成二次指数相关关系;正弦波形输入下电阻-散热器结构的温升幅度为恒压输入情况下的60%;散热器充分将热量传导并散热至常温需要时间为500 s。The controllable line commutated converter(CLCC)is a novel power electronic device with the potential to address the issue of continuous blocking in multi-fed direct current(DC)systems.The performance of its key component,the resistor-heatsink,influences the temperature distribution and long-term stability of the device.For the CLCC resistor-heatsink,a three-dimensional coupled electric-thermal field computational model was established using COMSOL software,and the temperature distribution law and heat dissipation effect under the input conditions of different amplitude constant voltage potential and sinusoidal potential were analyzed based on the finite element method.The results indicate that under short-term impact,the temperature rise of the CLCC resistor-heatsink is concentrated in the resistive area,and the magnitude of the temperature rise exhibits a quadratic exponential correlation with the magnitude of the voltage applied.Under sinusoidal waveform input,the magnitude of the temperature rise in the resistor-heatsink structure is 60%of that observed under constant voltage input.Furthermore,it takes 500 s for the heatsink to fully conduct the heat and dissipate it to ambient temperature.

关 键 词：可控换相换流器 电阻-散热器 电热耦合 温度分布 

分 类 号：TM46[电气工程—电器]