开关损耗及共模电压双重优化的三电平PWM算法  

Three-level PWM Algorithm with Dual Optimization of Switching Loss and Common-mode-voltage

作　　者：张皓 陈天牧 续明进 卻银槐 刘子淇 ZHANG Hao;CHEN Tianmu;XU Mingjin;QUE Yinhuai;LIU Ziqi(School of Mechanical and Electrical Engineering,Beijing Institute of Graphic Communication,Beijing 102600,China)

机构地区：[1]北京印刷学院机电工程学院,北京102600

出　　处：《电气传动》2020年第6期27-33,共7页Electric Drive

基　　金：北京市自然基金(KZ201510015016);北京市教委科技创新服务能力建设项目(04190118002);北京高等学校高水平人才交叉培养“实培计划”项目(03150118005)。

摘　　要：针对多电平逆变电路中现有波形调制算法使逆变器产生较高开关损耗和共模电压的问题,通过分析三电平逆变器参考相电压零序分量注入条件,建立相电压调制函数模型,确定降低开关次数与抑制共模电压双重优化目标,分析目标函数中调制度和基波相位角之间的数学关系,提出了一种新型的三电平逆变电路相电压调制波波形变换算法。该算法根据不同的调制度,通过注入适当的零序分量实现调制波波形变换,使开关器件在单个周期内减少1/3开关次数且共模电压幅值最小。仿真和实验结果显示了该算法的可行性和有效性。In multilevel inverters,switching loss and common-mode voltage are always key factors affecting the performance of inverters.By analyzing the injection condition of the zero-sequence component of the reference phase voltage of the three level inverters,the phase voltage modulation function model was established,the optimal target of reducing switching time and suppressed common-mode voltage,was selected the mathematical relation between modulation coefficient and fundamental phase was analyzed,a new type of phase voltage modulation wave waveform transformation algorithm for the three-level inverter circuit was proposed.The switching device could reduce 1/3 switching times in a single cycle and the common-mode voltage amplitude was minimum.Simulation and experiment results demonstrate the feasibility and effectiveness of the algorithm.

关 键 词：三电平逆变 波形变换 开关损耗 共模电压 零序分量 

分 类 号：TM464[电气工程—电器]