大功率晶闸管暂态过程分析及吸收回路的研究-BowenPublishing.PDFVIP

Scientific Journal of Electrical Engineering Dian Qi Gong Cheng Qi Kan 大功率晶闸管暂态过程分析及吸收回路的研究 1 2 1 王莉 ，庞延庆 ，牛文东 1. 山东省电力学校，山东 泰安 271000 2. 山东泰开电力电子有限公司，山东 泰安 27 1000 摘 要：随着柔性交流输电(FACTS)和高压直流输电设备(HVDC)在电力系统中的应用越来越广泛，由晶闸管主要组成的高电压大 电流电子开关越来越成为人们关注的对象。本文应用晶闸管的pspice 模型对大功率晶闸管的反向恢复暂态过程以及其阻容吸收回 路对其关断过程的影响进行了深入研究发现，在晶闸管阀反向恢复关断的过程中，由于串联晶闸管反向恢复电荷的差异，晶闸管 的恢复关断时刻不一致，导致它们恢复阻断后的电压以及反向恢复过渡过程中的熄灭过冲电压均有差异，需要选择合适的阻容吸 收回路以保持器件开关的一致性，为工程设计提供理论依据。 关键词：晶闸管；反向恢复暂态过程；电力电子技术 The Research on Transient Analysis and Auxiliary Circuit of Power Thyristor 1 2 1 Li Wang , Yanqing Wang , Wendong Niu 1. Shandong Electric Power School, Taian, China, 27 1000 2. Shandong Tai Kai Power Electronic co., LTD, Taian, China, 271000 Abstract: With more and more applications of devices of Flexible Alternative Current Transmission System (FACTS) and High Voltage Direct Current transmission (HVDC), more and more attentions are paid to the power electronics switches mainly composed of thyristors. Based on exponential pspice model of the thyristor, the transient analysis, mathematical derivation and simulation for the transient of reverse recovery of thyristors are performed. Comparison of the results from calculation and simulation shows that the transient analysis by the paper is correct and the assumption for calculation formulae is reasonable to some extent of precision. The thyristor recovery turn-off time will be different because of the value differences of the reverse recover