不平衡电网条件下维也纳整流器控制策略研究  

Research on Control Strategy of Vienna Rectifier Under Unbalanced Grid Condition

作　　者：何晨 黄海宏[1,2] HE Chen;HUANG Haihong(School of Electrical Engineering and Automation,Hefei University of Technology,Hefei 230009,China;Intelligent Manufacturing Institute of HFUT,Hefei 230000,China)

机构地区：[1]合肥工业大学电气与自动化工程学院,安徽合肥230009 [2]合肥工业大学智能制造技术研究院,安徽合肥230000

出　　处：《电器与能效管理技术》2022年第4期12-18,34,共8页Electrical & Energy Management Technology

基　　金：合肥工业大学智能制造技术研究院2019年度科技成果转化及产业化重点项目(IMICZ2019006)

摘　　要：当电网电压不平衡时,采用原有的控制策略会产生大量三次谐波电流,维也纳整流器运行的稳定性会受到严重的影响。在分析电网电压不平衡时整流器运行功率脉动原因的基础上,运用准PR调节器控制策略向网侧注入适量的负序电流,以抑制有功功率和直流侧电压的脉动。算法可以精准、快速地将电网相序分离,使系统的控制更加快速。最后,通过MATLAB/Simulink仿真和试验平台验证了控制策略的可行性。When the grid voltage is unbalanced,the original control strategy will generate a large amount of third harmonic current,and the stability of the rectifier operation in Vienna will be seriously affected.Based on the analysis of the causes of rectifier operation power pulsation when the grid voltage is unbalanced,the quasi-PR regulator control strategy is applied to inject an appropriate amount of negative sequence current into the grid side to suppress the active power and DC side voltage pulsation.The algorithm can separate the grid phase sequence precisely and quickly,which makes the control of the system faster.Finally,the feasibility of the control strategy is verified by MATLAB/Simulink.

关 键 词：谐波电流 维也纳整流器 不平衡电网 准PR控制 

分 类 号：TM721.1[电气工程—电力系统及自动化]