复合母排中点电流的研究

Study on Midpoint Current of Compound Busbar

本文以NPC三电平逆变器为例,研究了复合母排端口参数矩阵的提取方法及复合母排多端口电路模型的建模方法,并且利用母排多端口模型搭建了NPC三电平逆变器的仿真系统。根据中点电流的形成原理以及震荡的机理,分析了逆变器元件的杂散参数对中点电流的影响。测结果验证了仿真计算的可靠性与有效性,该分析和仿真计算方法可用于指导复合母排的参数计算与优化设计。

Taking NPC 3-level inverter as an example, this paper studies the method of extracting composite compound bus bar port parameter matrix and building composite compound busbar multi-port circuit model. The busbar multi-port model is used to build a NPC 3-level inverse inverter simulation system. Based on the principle of the formation of midpoint current and the shock resonance mechanism, the influence on midpoint current of the stray parameters of the inverter for midpoint current is analyzed. The results of the experiments demonstrate the reliability and validity of the simulation, which means this method can be used in parameter calculation and optimal design of compound busbar.