用于感应电机驱动的变频器建模方法综述

Summarizing the Methods of Modeling Frequency Converter for Induction Machines

随着电力电子技术、控制技术的发展,采用变频器驱动的感应电机推进系统已成为综合电力系统的主要技术之一。综合电力系统采用变频器驱动感应电机推进系统,具有体积小、重量轻、转矩密度高和无级变速可调等优点。为了深入分析变频器的各种静动态性能,需要对变频器进行建模研究,目前用于变频器建模的方法主要有开关函数法、状态空间平均法、广义状态空间平均法和电源开关等效法。系统地总结了各种建模方法的基本原理和优缺点,为变频器的建模研究奠定了基础。

With the development of power electronic technique and automatic control technique, the induction machine has become a new type of propulsion motor for Integrated Power System （IPS）, and has the advantages of small size, light weight and high torque density, changeable speed. In order to analyze the static and dynamic performances of frequency converter, modeling is needed. Now, methods for modeling frequency converter used in induction machine are switching-function （SF） method, state space averaging （SSA） method, general state space averaging （GSSA） method and source-switching equivalent （SSE） method. The basic theories, advantages and disadvantages of all the modeling methods are summarized, offering feasible methods for further study on frequency converter.