基于三相电压型PWM整流器控制策略研究  

Research on Control Strategy of Three-phase Voltage Source PWM Rectifier

作　　者：王归新[1] 金申义 WANG Guixin;JIN Shenyi(College of Electrical Engineering&New Energy,Three Gorges University,Yichang 443002,Hubei,China)

机构地区：[1]三峡大学电气与新能源学院

出　　处：《电气传动》2019年第10期34-38,74,共6页Electric Drive

基　　金：湖北省微电网工程技术研究中心开放基金(2015KDW03)

摘　　要：三相整流过程中,采用特定三相整流拓扑,依据建立的数学模型,制定合适的控制策略,从而抑制三 相整流过程电网中产生的谐波,实现网侧电流跟踪电压正弦化波动。采用三相电压型PWM整流器,分析工作 原理,建立数学模型,制定双闭环PI控制策略,并对双闭环策略进行改进,即外环采用滑模变结构控制,内环采 用预测电流控制。对比2种控制策略,分析网侧电流波形和谐波含量。通过在Matlab/Simulink仿真平台搭建 仿真模型,依据网侧电压、电流波形以及网侧电流谐波含量,验证该控制策略有助于抑制网侧电流谐波,实现 电流跟踪电压正弦波动。In the three-phase rectification process,a specific three-phase rectification topology is adopted,and a suitable control strategy is formulated according to the established mathematical model.In this way,the harmonics generated in the three-phase rectification process network are suppressed,and the sinusoidal fluctuation of the currentside current tracking voltage is realized.The working principle and mathematical model of the three-phase voltage-type PWM rectifier were analyzed,and improved the double closed-loop strategy,that is,the outer ring adopted sliding mode variable structure control,and the inner ring adopted predictive current control.Compared the control strategies,the current waveform and harmonic content on the grid side were analyzed.This control strategy was validated by building a simulation model in the Matlab/Simulink simulation platform,according to the grid-side voltage and current waveforms and the current harmonic content of the grid side,it is verified that the control strategy helps to suppress the current harmonics on the grid side and realize the sinusoidal fluctuation of the current tracking voltage.

关 键 词：电流谐波 正弦化 数学模型 控制策略 仿真模型 

分 类 号：TM461[电气工程—电器]