摘要
为精确计算动态均压缓冲电路引起的晶闸管开通电流应力,分析理想开关模型的缺陷,通过正交实验研究晶闸管开通指数电压源模型的影响因素。应用该指数电压源模型,推导出开通电流应力的计算公式。并在仿真平台PSCAD/EMTDC中应用指数电压源模型进行了仿真分析,结果表明:理想开关模型不能客观、准确地反映该电流应力,应采用指数电压源模型进行计算;影响该指数模型中的关键参数的多种因素中,电压因素影响力最大。
To calculate turning-on current stress of thyristors caused by dynamic voltage-sharing snubber circuit, the defects of ideal switch model is analyzed and by means of orthogonal experiments the factors impacting on exponential voltage-source model of thyristor are researched. Utilizing the exponential voltage-source model, the formula to calculate the turning-on current stress is derived, and the simulation of the exponential voltage-source model is performed by PSCAD/ EMTDC software. The research shows that ideal switch model of thyristor cannot reflect the current stress objectively and accurately, so the exponential voltage-source model of thyristor should be applied in the calculation; the key parameter in the exponential voltage-source model of thyristor is influenced by many factors, in which the voltage plays the biggest role.
出处
《电网技术》
EI
CSCD
北大核心
2011年第3期124-128,共5页
Power System Technology
基金
2009-2010年度中国农业大学研究生科研创新专项基金(15059203)的资助
关键词
晶闸管
动态均压
缓冲电路
电流应力
thyristor
dynamic voltage-sharing
snubbercircuit
current stress
