Coordination Method for DC Fault Current Suppression and Clearance in DC Grids  

作　　者：Xibei Zhao Lixu Chen Gen Li Jianzhong Xu Jinsha Yuan 

机构地区：[1]State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources,North China Electric Power University,Beijing 102206,China [2]School of Engineering,Cardiff University,Cardiff,UK

出　　处：《CSEE Journal of Power and Energy Systems》2022年第5期1438-1447,共10页中国电机工程学会电力与能源系统学报（英文）

基　　金：This work was supported by National Key Research and Development Program under Grant No.2018YFB0904600;the National Natural Science Foundation of China under Grant No.51777072.

摘　　要：The modular multilevel converter(MMC)based DC grid is considered as a future solution for bulk renewable energy integration and transmission.However,the high probability of DC faults and their rapid propagation speed are the main challenges in the development of DC grids.Existing research primarily focuses on the DC fault clearance methods,while the fault current suppression methods are still barely researched.Additionally,the coordination method of fault current suppression and clearance needs to be optimized.In this paper,the technical characteristics of the current suppression methods are studied,and the coordinated methods of fault current suppression and clearance are proposed.At last,a cost comparison of these methods is presented.The research results show that the proposed strategies can reduce the cost of the protection equipment.

关 键 词：DC circuit breaker DC fault DC grid fault current limiter(FCL) 

分 类 号：TM721.1[电气工程—电力系统及自动化]