Research of Direct Power Control for PWM Rectifier under Unbalanced Grid Voltage
The phenomenon of unbalanced grid voltage would add a lot of harmonics to AC current and DC voltage of Voltage Source Rectifier (VSR),and reduce the power factor or even damage the rectifier unit.In the paper,a developed direct power control (DPC) strategy for PWM rectifier under unbalanced grid voltage conditions is proposed to solve the problems.First of all,the instantaneous power could be calculated by the positive and negative sequence voltage and current.The comparison value between reference values and calculated values of power are regulated to build the output voltage space vector in order to use SVPWM.This strategy can make the output voltage desirable and improve the power factor and system performance.At last,the results of the simulation verify that this strategy is correct and feasible.
PWM rectifier Unbalanced grid voltage Direct power control SVPWM
ZHENG Zheng ZHANG Zhen-hua
School of Electrical Engineering and Automation,Henan Polytechnic University,Jiaozuo 454003,China
国际会议
the 25th Chinese Control and Decision Conference(第25届中国控制与决策会议)
贵阳
英文
3607-3612
2013-05-01（万方平台首次上网日期，不代表论文的发表时间）