交流变频调速系统仿真建模及谐波特性分析
摘要：随着电力电子技术的发展，交流变频调速系统以其强大的优势逐渐取代传统的直流调速传动，其在给人们生产生活带来方便和效率的同时，也造成了电力系统谐波污染加重的问题。因此，设计了一种开环正弦脉宽调制（sinusoidal pulse width modulation，SPWM）控制的交流变频调速系统并搭建仿真模型，实现了对系统中变频器输出电压频率和幅值及电机转速的灵活控制。对系统网侧电压和电流进行了谐波特性分析，结果表明：网侧电压的波形比较理想、畸变很小，而电流波形畸变严重；且随着变频器输出频率的增加，电压波形畸变程度有所加剧，电流畸变程度有所减轻。
Abstract:With the development of power electronics technology, AC frequency conversion speed regulation system gradually replaces the traditional DC speed regulation drive with its strong advantages. It brings convenience and efficiency to people's production and life, but also causes the problem of aggravating harmonic pollution in power system. Therefore, this paper designed an open-loop sinusoidal pulse width modulation (SPWM) controlled AC variable frequency speed regulation system and built a simulation model, which realized the flexible control of the frequency and amplitude of the output voltage of the converter, as well as the motor speed. Furthermore, the harmonic characteristics of the voltage and current on the grid side of the system were analyzed. The simulation results show that the waveform of the voltage is ideal and its distortion is very small, but the current waveform distortion is serious. In addition, with the increase of the inverter output frequency, the distortion degree of voltage waveform is intensified, and the current distortion is reduced.
标题：交流变频调速系统仿真建模及谐波特性分析
title:Simulation Model of AC Variable Frequency Speed Regulation System and Harmonic Characteristics Analysis
作者：曾令华,程亮,张靖宗
authors:Linghua ZENG,Liang CHENG,Jingzong ZHANG
关键词：变频调速,变频器,异步电动机,谐波分析,
keywords:frequency speed regulation,inverter,asynchronous motor,harmonic analysis,
发表日期：2019-06-30
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