Analysis and Control of Modular Multi-terminal DC Power Flow Controller with Fault Current Limiting Function  

作　　者：Qianming Xu Xinyu Huang Xu Chu Mingshen Li Zhikang Shuai Chunming Tu Josep M.Guerrero 

机构地区：[1]College of Electrical and Information Engineering,Hunan University [2]Department of Energy Technology,Aalborg University

出　　处：《Journal of Modern Power Systems and Clean Energy》2021年第6期1375-1385,共11页现代电力系统与清洁能源学报（英文）

基　　金：supported in part by National Key R&D Program of China(No.2018YFB0904600);National Natural Science Foundation of China(No.51807053)。

摘　　要：In order to overcome the problems of power flow control and fault current limiting in multi-terminal high voltage direct current(MTDC)grids,this paper proposes a modular multi-terminal DC power flow controller(MM-DCPFC)with fault current limiting function.The topology structure,operation principle,and equivalent circuit of MM-DCPFC are introduced,and such a structure has the advantages of modularity and scalability.The power balance mechanism is studied and a hierarchical power balance control strategy is proposed.The results show that MM-DCPFC can achieve internal power exchange,which avoids the use of external power supply.The fault characteristics of MM-DCPFC are analyzed,fault current limiting and self-protection methods are proposed,and the factors affecting the current limiting capability are studied.The simulation models are established in PLECS,and the simulation results verify the effectiveness of MM-DCPFC in power flow control,fault current limiting,and scalability.In addition,a prototype is developed to validate the function and control method of MM-DCPFC.

关 键 词：Fault current limiting multi-terminal high volt-age direct current(MTDC)grid power balance DC power flow controller 

分 类 号：TM721.1[电气工程—电力系统及自动化] TM571