降低Vienna整流器电流失真的无功补偿方法  

Reactive Power Compensation Method for Reducing Current Distortion of Vienna Rectifier

作　　者：丁俊 苏建徽 汪海宁[1,2] 杜燕 DING Jun;SU Jian-hui;WANG Hai-ning;DU Yan(Hefei University of Technology,Heifei 230009,China;不详)

机构地区：[1]合肥工业大学,安徽合肥230009 [2]合肥工业大学光伏系统教育部工程研究中心,安徽合肥230009

出　　处：《电力电子技术》2023年第4期32-37,共6页Power Electronics

基　　金：国家重点研发计划(2021YFB2601403)。

摘　　要：Vienna整流器因其高效率和高功率密度而被广泛应用于各种电源设备的前级整流器。然而,该拓扑在整流器网侧电流纹波较大时存在电流过零点附近失真问题。现有的使过零相调制波箝位至零的电流过零失真解决方法不能从本质上消除电流过零失真。此处从矢量调制角度分析了电流失真机理,从电流过零失真问题的本质原因出发,提出无功补偿的方法解决电流过零失真问题,并与调制波箝位方法作对比,仿真与实验验证了所提方法的实用性。Vienna rectifier is widely used as a front rectifier for various power supplies due to its high efficiency and high power density.However,the topology has distortion near zero crossing when the current ripple is large.The current zero-crossing distortion can not be eliminated essentially by the current zero-crossing phase modulation wave clamp to zero.The mechanism of current distortion is analyzed from the angle of vector modulation,and the reactive power compensation method is proposed to solve the current zero crossing distortion problem from the essence of the current zero-crossing distortion problem,and compared with the modulation wave clamp method,simulation and experiment verify the practicality of the proposed method.

关 键 词：整流器 电流失真 过零箝位 无功补偿 

分 类 号：TM461[电气工程—电器]