摘要
针对H桥级联变换器存在功率器件数量多、控制复杂等问题,提出一种三相线电压级联整流器拓扑;分析了此拓扑的工作原理、电路等效模型及交流侧电流正弦化工作的开关管调制约束条件;通过解析拓扑交流侧相桥臂电压的谐波成分,设计了基于单周期控制的移相载波PWM调制策略及功率因数校正控制器;推导了拓扑直流侧电容电压的控制传递函数。理论分析及实验验证表明,此拓扑及其控制策略使开关管承受耐压有效降低,提高了交流侧功率因数,可作为新一代中高压变换器整流级。
In this paper,a novel three-phase rectifier based on triple line-voltage cascaded VIENNA converter(LVC-VC)has been proposed,which could be the high power factor rectifier under high power voltage.Compared to conventional three-phase cascaded H-bridge converters,in the proposed new multilevel converters,and fewer switches and dc capacitors are required under similar operating conditions.Based on the study to the operation principle of the new converter,the power factor correction of the proposed converter is realized by employing traditional one-cycle control strategy,the carrier phase-shifting modulation is designed to reduce the ac voltage harmonic.The dc side capacitor voltage steady state mathematical model is deduced,the scope of the dc side capacitor voltage is calculated,the controllers of dc-link voltages of the three Vienna rectifier modules are designed.Simulation and experimental results verified the availability of the new proposed multilevel converter and the validity of the corresponding control strategy applied.
作者
邹甲
王聪
Zou Jia;Wang Cong(School of Mechanical Electronic and Information Engineering,China University of Mining and Technology,Beijing 100083,China)
出处
《矿业科学学报》
2019年第6期531-538,共8页
Journal of Mining Science and Technology
基金
国家自然科学基金(51577187)
中央高校基本科研业务费专项资金(2015QJ11)
关键词
线电压级联
VIENNA变换器
单周期控制
载波移相
line voltage cascaded
Vienna converter
one-cycle control(OCC)
the carrier phase-shifting modulation
作者简介
邹甲(1984—),男,工程师,博士,主要从事电力电子变换技术方面的研究工作。Tel:13683677117,E-mail:zjia@cumtb.edu.cn
