摘要
高压IGBT串联是提高大容量变换器电压等级和容量的有效手段之一,但器件串联带来的复杂机械结构为母排设计与杂散参数建模分析带来巨大的困难,常规的部分单元等效电路(PEEC)方法直接用于该领域难以保证准确性。该文提出了一种应用于提取大尺寸复杂结构母排杂散参数的改进的PEEC方法和结构设计准则,采用分块计算方式建立了母排杂散参数模型。在实际的4.5kV/600A高压IGBT串联试验平台上进行了系列高压大电流试验,在剔除换流二极管正向特性影响的条件下,对比实验和仿真结果分析了母排杂散参数对器件暂态的影响,证明了该方法的准确性与实用性。该设计方法降低了杂散参数,提升了变换器运行的可靠性,并为主动控制创造了有利条件。
High-voltage IGBTs series are one of the most effective means to improve converter voltage levels and capacities. However, the complex mechanical structure when the devices are used in series complicates bus bar design and stray parameter modeling. The results may not be accurate if the conventional PEEC method is used. This paper describes the bus bar design principles and ways to improve the PEEC method when extracting large complex structure bus bar stray parameters. The bus bar parameter model is based on the partitioning calculation result. The influence of stray parameters during the switch transieEt process is illustrated by simulations and tests on a 4.5kV/600A HVIGBTs series experimental platform with consideration of the diode forward recovery characteristics. The results illustrate the accuracy and practicality of the method and how bus bar design effectively reduces the stray parameters and creates favorable conditions for active control.
出处
《清华大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2014年第4期540-545,共6页
Journal of Tsinghua University(Science and Technology)
基金
国家"八六三"高技术项目(2011AA050402)
关键词
大容量
母排
杂散参数
部分单元等效电路
high capacity bus bar stray parameter partial elementequivalent circuit
