开关状态函数化及其在多电平逆变器分析中的应用  

Function of the Power Switch States and its Application on Multi-Level Inverter's Analysis

作　　者：刘汉阳[1] 黄松清[1] 

机构地区：[1]安徽工业大学电气信息学院,安徽马鞍山243002

出　　处：《电气技术》2013年第10期19-24,33,共7页Electrical Engineering

摘　　要：由于电力电子装置中的开关器件工作在非线性状态,使得对其分析一直停留在定性的阶段,这也成为电力电子技术分析、应用的瓶颈。针对此问题本文提出一种将开关状态函数化的分析方法,巧妙地将数学分析工具引入到电力电子技术的分析过程中。找出了函数化后的电力电子装置定义域,将输出定义为所需要的PWM信号。因此,可以根据传统的PWM技术,得到多电平PWM控制信号;也可以根据逆变器输出要求得到控制需要的PWM信号。利用开关状态函数的分析方法对多电平逆变器进行分析,提出了一种根据输出要求得到开关序列排布的简易方法和一种逆变器谐波输出计算方法。为验证方法的正确有效,在TI公司的TMS320F2812 DSP系统上进行了实验研究;同时基于Matlab平台对开关状态函数化方法进行研究,在仿真的基础上,利用Matlab之RTW将结果耦合到DSP,实现了系统的控制,结果较为满意。Since the switching devices in power electronic devices are operating in nonlinear states, extensive analysis of devices is difficult in a long time. An analysis method based on switch states function is proposed which makes many mathematical analysis tools available in the analysis of power electronics devices. The range of function value can be defined as the PWM signals, the traditional PWM algorithms can be transformed into multi-level PWM signal and the PWM signal can be derived from the expected performance parameters of inverter. By analyzing the multi-level inverter in this new method, a simplified way to design the switching sequence and a computation method of the inverter output wave＇s THD are proposed. The proposed analysis method is verified by simulation and experimental results from a laboratory prototype based on TMS320F2812 DSP. The algorithms can be coupled into DSP source code by the Matlab RTW easily.

关 键 词：电力电子技术分析方法 开关状态函数化 多电平 

分 类 号：TM464[电气工程—电器]