配电网并联补偿电容器对Vienna整流器稳定性的影响  

Influence of Shunt Compensation Capacitor on the Stability of Vienna Rectifier in Distribution Network

作　　者：徐瑶 同向前[1] 党超亮 XU Yao;TONG Xiangqian;DANG Chaoliang(School of Automation and Information Engineering,Xi＇an University of Technology,Xi＇an 710048,China)

机构地区：[1]西安理工大学自动化与信息工程学院,西安710048

出　　处：《电力电容器与无功补偿》2018年第4期106-111,共6页Power Capacitor & Reactive Power Compensation

基　　金：国家自然科学基金资助项目(51677151;51507138);陕西省重点学科建设专项基金(5X1301)

摘　　要：Vienna整流电路因开关器件少、电压应力低、功率密度大、可靠性高等特性,在电动汽车充电机前级整流模块中获得广泛应用。在Vienna整流器稳定运行时,电网中加入无功补偿装置会使得系统的稳定性降低,甚至导致不稳定。基于此,本文针对电动汽车充电机,依据阻抗比判据,分析了电网引入无功补偿装置时对Vienna整流器的稳定性影响。为进一步改善系统的稳定性,提出了一种阻抗调节方案,并通过仿真分析验证了所提方案的正确性与可行性。Vienna rectifier has been used widely in the front stage rectifier module of electric vehicle charger with such features as less switch element,low voltage stress,high power density and reliability. In case of stable operation of Vienna rectifier,addition of reactive power compensation dice to the grid can reduce system stability and even lead to instability. In view of this and as for the electric vehicle charger the influence of Vienna rectifier stability due to introduction of reactive power compensation device in the power network is analyzed on the basis of impedance ratios criteria. A kind of impedance adjustment scheme is proposed for improving system stability further, and both correctness and feasibility of the proposed scheme is analyzed and verified by the simulation.

关 键 词：VIENNA整流器 并联补偿电容器 稳定性 阻抗调节 

分 类 号：TM461[电气工程—电器]