PWM逆变器的直流侧等效模型研究  

Research on the DC-side Equivalent Model of PWM Inverters

作　　者：张加胜[1] 张磊[1] 

机构地区：[1]中国石油大学(华东)信控学院,山东省东营市257061

出　　处：《中国电机工程学报》2007年第4期103-107,共5页Proceedings of the CSEE

基　　金：国家自然科学基金项目(59677020);山东省自然科学基金项目(Y2003F02)。

摘　　要：在三相并网型太阳能、风力发电系统和交-直-交变频调速传动系统当中,PWM逆变器作为直流侧的典型负载,其直流侧的静、动态行为,对于其前端变流器的建模、控制方法及静动态性能研究和系统设计都具有重要作用。该文通过研究逆变器与四象限变流器(4QC)拓扑结构的统一性,将4QC的状态空间平均(SSA)模型经过移植得到逆变器的SSA模型,进而提出逆变器直流侧的等效数学模型和近似简化等效模型;通过理论分析和仿真研究揭示PWM逆变器的直流侧等效模型与逆变器及交流侧电路参数之间的定量关系,并给出等效模型的参数设计公式。仿真与实验研究结果证明了所建模型及理论分析的正确性与可行性。The DC-side static and dynamic behaviours of PWM inverters which act as typical DC-side load have influence on research on modeling, control approach and static and dynamic character of their front converters and system design in three-phase grid-connected solar or wind energy generation system and AC-DC-AC variable frequency adjustable speed drive system . This paper researches general unified topologies between inverter and 4-quadrant converter （4QC） and transplants state space average（SSA） model of 4QC to inverter to derive its SSA model. Thus DC-side equivalent mathematical model and approximate simplified model of inverters are proposed. Qualitative relations of the model with inverter and AC-side circuit parameters are revealed with theoretical analyses and numerical simulating, and some parameter design equations are given out. The validity of the model and its theory is confirmed by numerical simulating and esperimental results.

关 键 词：四象限变流器 PWM逆变器 直流侧等效模型 理论分析 

分 类 号：TM461[电气工程—电器]