CAJ | 학술논문

换流回路杂散电感和其中的 di/dt 共同作用，会使得开关器件在关断瞬态过程中，承受很高的感应电压尖峰，增大器件的电应力、增加系统开关损耗和电磁干扰，同时会使输出电压中包含大量高次谐波，影响系统性能。因此需要对包含换流回路在内的线路杂散电感进行准确计算，这其中以母排杂散电感最为关键。该文在对现有多种杂散电感提取方法进行分析比较的基础上，对换流回路开关瞬态过程的多个阶段进行梳理，寻找到开关瞬态过程中对杂散电感提取最有利的阶段，提出利用开通瞬态过程配合积分运算的方法代替目前利用关断电压峰值配合微分计算的方法。以实际3.3kV/1200A的IGBT构成的大容量变换器为分析对象，利用该方法对其进行杂散电感提取，并与部分单元等效电路的分析结果对比，验证该文提出的杂散电感值提取方法的准确性和实用性。
환류회로잡산전감화기중적 di/dt 공동작용，회사득개관기건재관단순태과정중，승수흔고적감응전압첨봉，증대기건적전응력、증가계통개관손모화전자간우，동시회사수출전압중포함대량고차해파，영향계통성능。인차수요대포함환류회로재내적선로잡산전감진행준학계산，저기중이모배잡산전감최위관건。해문재대현유다충잡산전감제취방법진행분석비교적기출상，대환류회로개관순태과정적다개계단진행소리，심조도개관순태과정중대잡산전감제취최유리적계단，제출이용개통순태과정배합적분운산적방법대체목전이용관단전압봉치배합미분계산적방법。이실제3.3kV/1200A적IGBT구성적대용량변환기위분석대상，이용해방법대기진행잡산전감제취，병여부분단원등효전로적분석결과대비，험증해문제출적잡산전감치제취방법적준학성화실용성。
In the turn-off transient of a switch device, the combined action of stray inductance in the converter circuit and the di/dt can bring higher voltage peak in the turn-off transient than in the off state, can result in more electric stress, and can increase switching losses and EMI. The stray inductance also produces a great deal of harmonics and influences inverter performance. Thus, as the most critical component, the bus bar stray inductance needs to be calculated accurately in converter circuits. In the base of analyzing the merits and faults of several existed methods for stray inductance extraction, the paper analyses multiple stages of turn-on/off transient and finds the best stage for inductance extraction. Then, it provides an integral arithmetic method in turn-on process to replace the differential arithmetic in turn-off process. In the actual large capacity inverter, which is composed by 3.3kV/1200A IGBT module, the stray inductance is extracted by the new method, and the results are compared with PEEC analysis results. The accuracy and practicability of the new extraction method are verified by the comparison.