摘要
随着特高压直流输电技术在我国电力系统中应用越来越广泛,以及整流电解技术在金属冶炼行业的不断发展,以大功率电力晶闸管为主的高电压、大电流电子半导体阀等核心技术已成为研究焦点。大功率晶闸管在大电流工作条件下将大量产热,过高的结温可能使其失效,直接影响到整个电力电子整流装置的可靠性,从而威胁到电力系统的安全稳定运行。因此,晶闸管的电热特性具有十分重要的研究价值。本文通过对晶闸管内部物理结构的调研,基于有限元方法,建立了晶闸管多材料层耦合的3D有限元模型,并对其进行稳态仿真分析,获得了晶闸管实时温度分布云图,总结了晶闸管PN结温度分布的规律,同时专门设计了温升实验对分析结果进行验证。实验结果与仿真得出的结论相吻合,证明了本文提出的晶闸管电热分析方法的有效性和实用性。
With the application of UHV DC transmission technology in China’s power system more and more, and the continuous development of rectification electrolysis technology in the metal smelting industry, high-voltage, high-current electronic semiconductor valves composed of high-power thyristors Core technology has become the focus of research. High-power thyristors will generate a large amount of heat under high-current working conditions. Excessive junction temperature may cause them to fail, directly affecting the reliability of the entire power electronic rectifier, thus threatening the safe and stable operation of the power system. Therefore, the electrothermal characteristics of thyristors have important research value. Based on the investigation of the physical structure of the thyristor, based on the finite element method, a 3D finite element model of thyristor multi-material layer coupling is established and its steady-state simulation analysis is carried out. The real-time temperature distribution cloud diagram of the thyristor is obtained, and the thyristor PN junction temperature is summarized. The law of distribution, and the temperature rise experiment was specially designed to verify the analysis results. The experimental results are consistent with the conclusions obtained by the simulation, which proves the validity and practicability of the thyristor electrothermal analysis method proposed in this paper.
作者
邝凡
柳竺江
严俊韬
田河
徐力斌
Kuang Fan;Liu Zhu-jiang;Yan Jun-tao;Tian He;Xu Li-bin
出处
《电力系统装备》
2019年第5期74-75,共2页
Electric Power System Equipment
关键词
大功率晶闸管
有限元方法
电热分析
温升试验
high power thyristor
finite element method
electrothermal analysis
temperature rise test
