基于最小有功注入策略的新型级联H桥逆变器动态电压恢复器  

A Novel Cascaded H-Bridge Inverter for Dynamic Voltage Restorer Based on Minimum Active Power Injection Strategy

作　　者：侯世英[1] 刘早晨[1] 嵇丽明[1] 庹元科[1] 

机构地区：[1]输配电装备及系统安全与新技术国家重点实验室(重庆大学),重庆市沙坪坝区400044

出　　处：《电网技术》2009年第17期96-101,共6页Power System Technology

摘　　要：基于最小有功注入策略,提出一种新型的动态电压恢复器(dynamic voltage restorer,DVR)结构,其主要结构由基本的级联H桥逆变器和并联的晶闸管开关电感组成。文章分析了新型DVR的电路拓扑和基本原理,推导了最小有功注入策略,分析了DVR的补偿能力和负载功率因数的关系,并设计了合适的控制系统。仿真结果表明,新型DVR可以处理更严重和更长时间的电压跌落,大大减少了DVR的有功注入。Based on minimum active power injection strategy, a new structure of dynamic voltage restorer （DVR）, which that mainly consists of basic cascaded H-bridge converter and a shunt thyristor-switched inductor, is proposed. The circuit topology of the new DVR and its basic principle are analyzed, the minimum active power injection strategy is derived and the relation between the compensation ability and power factor of load is analyzed, on this basis a appropriate control system is designed. Simulation results show that the proposed new DVR can deal with more severe and longer duration voltage sag, thus the active power injection for DVR can be evidently reduced.

关 键 词：级联逆变器 动态电压恢复器(DVR) 最小有功注入 功率因数 并联电感 

分 类 号：TM714[电气工程—电力系统及自动化]