Review of General Modeling Approaches of Power Converters  

作　　者：Dong Yan Chenglin Yang Lijun Hang Yuanbin He Ping Luo Lei Shen Pingliang Zeng 

机构地区：[1]Department of Electrical Engineering,Hangzhou Dianzi University,Hangzhou 310000,China [2]INVT Power System(Shenzhen)Co.,Ltd.,Shenzhen 518055,China

出　　处：《Chinese Journal of Electrical Engineering》2021年第1期27-36,共10页中国电气工程学报（英文）

基　　金：Supported by the National Natural Science Foundation of China(51777049,51707051).

摘　　要：The modeling approaches of power converters occupy an important position in power electronic systems and have made considerable progress over the past years.Continuous modeling approaches and linearization techniques are reviewed,including the state-space average model,generalized average model,averaged small-signal model,and describing function method.A Buck converter with PWM modulation and voltage-mode control is taken as an example to compare the advantages and disadvantages of different methods through simulation analysis.Moreover,the corresponding equivalent circuit with an intuitive physical meaning of state-space average model,generalized average model,and averaged small-signal model is given.The results point out that the generalized average model can improve the modeling accuracy based on the state-space average model.In the linearization techniques,the averaged small-signal model reflects accuracy at low frequencies,but introduces phase lag in the high-frequency region.The describing function method is derived from harmonic linearization,which takes into account the sideband effect and improves the modeling accuracy at high frequencies.

关 键 词：State-space average model generalized average model linearization techniques averaged small-signal model describing function method 

分 类 号：TM73[电气工程—电力系统及自动化]