电力系统保护与控制2011，Vol.39Issue(24)：41-46,6.
三相四桥臂逆变器控制技术研究
Research on control scheme of three-phase four-leg inverter
摘要
Abstract
Three-phase four-leg inverter has the capability of rejecting the unbalanced voltage due to asymmetrical loads. However, the unbalanced voltage still exists when the open-loop control or synchronous frame PI controller are used for three-phase four-leg inverter. In order to explain the reason for this phenomenon, the mathematical model for three-phase four-leg inverter is built, based on which the unbalanced output voltage problem is discussed. And then the solution to the voltage unbalance problem is presented. The proposed solution can mitigate the effect of unbalanced load current on three-phase output voltages, so the balanced sinusoidal voltage regulation can be achieved under the unbalanced loads. Finally, the system open-loop control and closed-loop control simulations are carried out under the conditions of no-load, balanced load and unbalanced load in Matlab/Simulink. Simulation results prove that the presented solution is valid.This work is supported by National Natural Science Foundation of China (No. 50837003 and No. 50977081) and Natural Science Foundation of Hebei Province (No. E2010001261).关键词
三相四桥臂逆变器/不平衡负载/不平衡电压/开环控制/闭环控制Key words
three-phase four-leg inverter/ asymmetrical loads/ unbalanced voltage/ open-loop control/ closed-loop control分类
信息技术与安全科学引用本文复制引用
顾和荣,王德玉,沈虹,赵巍,郭小强..三相四桥臂逆变器控制技术研究[J].电力系统保护与控制,2011,39(24):41-46,6.基金项目
国家自然科学基金资助项目(50837003,50977081) （50837003,50977081）
河北省自然科学基金项目(E2010001261) （E2010001261）
河北省高等学校科学研究项目(2011249,2010161) （2011249,2010161）
秦皇岛市科学技术研究与发展计划(201101A119) （201101A119）
