摘要
给出一种基于开绕组的动态电压恢复器(DVR)主回路结构,通过两组两电平变流器串联,等效实现三电平结构并简化的硬件成本。针对开绕组DVR存在的共模电压问题,通过分析主回路数学模型,提出一种调制波互差120°注入零序电压的调制策略,实现对系统高频和低频共模电压的完全抑制。最后搭建开绕组DVR实验平台,验证了调制策略的有效性。
An open-end winding main circuit structure of dynamic voltage restorer（DVR） is presented which is equivalent to achieve three-level inverter and simplifies the hardware cost through dual series two-level inverters.In view of the common mode voltage of open-end winding DVR, 120° differ of two modulation waves with zero sequence voltage injection is proposed to suppress the high and low frequency voltage completely by the analysis of mathematical model.Finally,the experimental platform of DVR is built to verify the effectiveness of the modulation strategy.
出处
《电力电子技术》
CSCD
北大核心
2016年第12期99-101,共3页
Power Electronics
基金
四川省自然科学基金(1412065MA05)
四川省高等学校科技计划项目(J15LN73)~~
关键词
动态电压恢复器
开绕组
共模电压
dynamic voltage restorer
open-end winding
common mode voltage
