全数字锁相的高功率因素三相三线Vienna整流电路研究

Research on Three Phase Three Wire Vienna Rectifier Circuit with Digital Phase Locked Loop

三相三线维也纳(Vienna)整流电路是一个强耦合、非线性的复杂系统,其工作状态组合多且控制系统复杂。介绍了Vienna整流装置拓扑结构和工作特点,分析了其工作原理;为实现高功率因素校正,引入了全数字锁相技术(DPLL),同时建立了Vienna整流电路三相静止坐标系和两相同步旋转坐标系的数学模型,设计了解耦控制双闭环控制策略;最后,搭建了三相三线Vienna整流电路仿真模型,验证了基于全数字锁相技术的解耦控制算法的可行性。

Three phase three wire Vienna rectifier circuit is a strong coupling,nonlinear complex system,and its working state combination and control system is complex.This paper introduced Vienna rectifier topology structure and characteristics,analyzed the working principle.In order to achieve unity power factor,digital phase lock technique was introduced in this paper.And based on three-phase static coordinate and two-phase synchronous rotating coordinate mathematical model,strategy of double closed loop control strategy was designed.The simulation model of three-phase three wire Vienna rectifier circuit is set up,and the simulation results verify the feasibility of the system working principle and control algorithm.