不平衡电网下Vienna整流器电流畸变抑制方法  

Method of Current Distortion Suppression for Vienna Rectifier Under Unbalanced Grid

作　　者：史兆成 武轶文 张弛 刘宁昕 SHI Zhaocheng;WU Yiwen;ZHANG Chi;LIU Ningxin(School of Intelligent Manufacturing,Wuhu Institute of Technology,Wuhu 241006,Anhui Province;State Grid Chizhou Power Supply Company,Chizhou 247000,Anhui Province;School of Electric Power Engineering,Shanghai University of Electric Power,Shanghai 200000,China)

机构地区：[1]芜湖职业技术学院智能制造学院,安徽芜湖241006 [2]国网池州供电公司,安徽池州247000 [3]上海电力大学电气工程学院,上海200000

出　　处：《沈阳工程学院学报（自然科学版）》2024年第3期57-65,共9页Journal of Shenyang Institute of Engineering:Natural Science

基　　金：安徽省高校自然科学重点研究项目(2023AH052389,2023AH052380);芜湖职业技术学院2023年校级科研(wzyzr202337)。

摘　　要：Vienna整流器结构简单、功率密度高,被广泛应用于航空电源、电动汽车充电系统等工业中。当Vienna整流器在不平衡电网下运行时,采用传统的控制策略会导致输入电流过零畸变,影响电能质量。为解决这一问题,通过分析Vienna整流器输入电流畸变机理,提出一种调制波区间钳位控制策略。所提方法通过在钳位区间内叠加零序分量将参考电压钳位至零,避免输出错误的桥臂电压信号,从而抑制输入电流畸变,提高电能质量。最后通过实验验证了所提策略的有效性。Vienna rectifier with simple structure and high-power density,which is widely used in industrial applications such as aviation power supplies and electric vehicle charging systems.The conventional control strategy will lead the input current zero-crossing distortion when the Vienna rectifier is operated under the unbalanced grid.To solve this problem,the modulation wave interval clamping control strategy is proposed.The proposed method clamps the reference voltage to zero by superimposing a zero-sequence component in the clamping interval which can avoid the output of erroneous bridge arm voltage.Thus,the input current distortion can be suppressed,and the power quality can be improved.Finally,the effectiveness of the proposed strategy is verified by experiments.

关 键 词：VIENNA整流器 不平衡电网 输入电流过零畸变 负序电流调节 

分 类 号：TP273[自动化与计算机技术—检测技术与自动化装置]