三相电压型PWM整流器双滞环电流控制策略的研究  

A Novel Two-Hysteresis Current Control Method of Three-phase Voltage-type PWM Rectifier

作　　者：汪显博[1] 卜文绍[1] 翟丽丽[1] 

机构地区：[1]河南科技大学电子信息工程学院,河南洛阳471003

出　　处：《电测与仪表》2010年第11期36-41,共6页Electrical Measurement & Instrumentation

基　　金：河南省重点科技攻关项目(082102240086);河南科技大学科研基金项目(2003ZY27)

摘　　要：提出了一种适用于三相无中线PWM整流器的定频滞环电流控制改进算法。其主要原理是利用三相PWM整流器线电流与功率器件开关状态的关系,对线电流实行解耦,利用双滞环来判断参考空间电压矢量的位置,结合锁相环电路对输出的开关状态进行检测,构成频率闭环控制。最后在MATLAB/simulink工具箱中进行了仿真验证。该改进算法保留了传统滞环控制电流跟踪响应快、有限流能力的优点,同时也有效的克服了开关频率变化不固定、开关损耗增大等问题。A improved algorithm of constant-frequency hysteresis current control method for three-phase voltage PWM rectifier without centerline was proposed.Its main principle was to use decoupling control of the line current under the relationship between line current and status of switch.The position of reference space voltage vector can be judged by double hysteresis loop.Output switch state can be detected by phase-locked loop circuit.At last,this improved algorithm was simulated in MATLAB/simulink toolbox.The improved algorithm retained the traditional hysteresis current tracking control of fast response and limited current capacity,also effectively overcomed effectively overcome the non-fixed switching frequency,the larger switching loss.

关 键 词：PWM整流器 滞环控制 开关频率 功率因数 仿真 

分 类 号：TM461[电气工程—电器]