Circulating Current Suppression for MMC-HVDC Systems with Asymmetric Arm Impedance

作     者：Fujin Deng Qian Heng Chengkai Liu Yongqing Lyu Qingsong Wang Dan Liu Rongwu Zhu Fujin Deng;Qian Heng;Chengkai Liu;Yongqing Lyu;Qingsong Wang;Dan Liu;Rongwu Zhu

作者机构：School of Electrical Engi-neeringSoutheast Universityand Jiangsu Key Laboratory of Smart Grid Technology and EquipmentNanjing 210096China School of Electrical EngineeringSoutheast UniversityNanjing 210096China State Grid Jiangsu Electric Power CO.LTD.Research InstituteNanjing 211106China Department of Power ElectronicsChristian-Albrechts-University of KielKiel2D-24142Germany 

出 版 物：《CSEE Journal of Power and Energy Systems》 (中国电机工程学会电力与能源系统学报（英文）)

年 卷 期：2021年第7卷第3期

页      面：530-540页

核心收录：

学科分类：080802[工学-电力系统及其自动化] 0808[工学-电气工程] 08[工学] 

基　　金：This work was supported by the Science and Technology Program of the State Grid Corporation of China(Grant No.5100-201999330A-0-0-00) 

主　　题：Circulating current suppressing control strategy high-voltage direct-current modular multilevel converter 

摘      要：The modular multilevel converter(MMC)has been a highly promising topology in the high-voltage direct-current(HVDC)transmission area,where each arm of the MMC may consist of hundreds of series-connected submodules and an *** to its parameter inaccuracy,component aging,and so on,the component parameter in different arms of the MMC may be different,which may cause circulating current in the MMC-HVDC transmission system,and result in current deterioration,power losses,and electromagnetic interference,*** this paper,the circulating current suppressing(CCS)in the MMC-HVDC system,due to asymmetric arm impedance,is *** on the mathematical analysis,a method of using an auxiliary circuit is proposed for the MMC to realize the CCS and improve the performance of the MMC-HVDC *** studies are conducted with PSCAD/EMTDC in the HVDC system,which confirms the feasibility of the proposed method.