三相不平衡时的PWM整流器锁相环设计  

A Design of Soft Phase Lock Loop in Three-phase PWM Rectifier under Unbalance Power Grid

作　　者：章勇高[1] 高彦丽[1] 刘焕[1] 龙立中[1] 

机构地区：[1]华东交通大学电气与电子工程学院,江西南昌330013

出　　处：《华东交通大学学报》2011年第5期14-17,共4页Journal of East China Jiaotong University

基　　金：江西省科技厅工业支撑计划项目(2010ZDG02400);华东交通大学科学研究项目(10DQ06)

摘　　要：获取电网相位是三相PWM整流器运行和控制的前提。软件锁相环具有设计方便、适应性强的优点,能够快速获取电网电压不平衡时的相位。分析三相电压不平衡时电网相位关系,讨论基于瞬时无功理论的软件锁相环设计原理和二次椭圆型陷波器的设计。建立了软件锁相环的MATLAB仿真模型和三相PWM整流器的实验装置,仿真和实验结果证明具有二次陷波器的软件锁相环的有效性。对于其它电力电子装置的锁相环设计具有借鉴价值。The operation and control of three-phase PWM rectifier is implemented based on obtaining the phase shift of grid voltage accurately.Soft phase lock loop（SPLL） is appropriate to track the phase shift of three-phase unbalance voltage because of its simplicity and flexibility.The paper analyzes the phase shift under unbalance three-phase power grid,studies the principle of SPLL based on instantaneous reactive power theory and designs the secondary harmonic elliptic notch filter.The Matlab simulation mode of the designed SPLL and a three-phase PWM rectifier valid the SPLL with the secondary harmonic elliptic notch filter.This paper has the reference of design of PLL for other power electronic application.

关 键 词：软件锁相环 电压不平衡 二次陷波器 三相PWM整流器 

分 类 号：TN713.4[电子电信—电路与系统]