Improved Identification Method and Fault Current Limiting Strategy for Commutation Failure in LCC-HVDC

作     者：Jian Liu Sheng Lin Wenliang Zhong Lei Liu Jian Liu;Sheng Lin;Wenliang Zhong;Lei Liu

作者机构：School of Electrical EngineeringSouthwest Jiaotong UniversityChengdu 610031China State Grid Sichuan Electric Power Research InstituteChengdu 610072China 

出 版 物：《Journal of Modern Power Systems and Clean Energy》 (现代电力系统与清洁能源学报（英文）)

年 卷 期：2022年第10卷第6期

页      面：1761-1772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：supported by the National Natural Science Foundation of China(No.51977183) 

主　　题：Line commutated converter based high-voltage direct current(LCC-HVDC)transmission commutation failure identification commutation failure mitigation HVDC transmission control 

摘      要：Line-commutated converter based high-voltage direct-current(LCC-HVDC)transmission systems are prone to subsequent commutation failure(SCF),which consequently leads to the forced blocking of HVDC links,affecting the operation of the power *** accurate commutation failure(CF)identification is fairly vital to the prevention of ***,the existing CF identification methods cause CF misjudge or detection lag,which can limit the effect of SCF mitigation *** addition,earlier approaches to suppress SCF do not clarify the key factor that determines the evolution of extinction angle during system recovery and neglect the ***,this paper firstly analyzes the normal commutation process and CF feature based on the evolution topology of converter valve conduction in ***,the energy in the leakage inductance of converter transformer is presented to characterize the commutation state of the *** a CF identification method is proposed utilizing the leakage inductance ***,taking the key variable which is crucial to the tendency of extinction angle during the recovery process into account,a fault current limiting strategy for SCF mitigation is put *** with the original methods,the proposed methods have a better performance in CF identification and mitigation in terms of detection accuracy and mitigation ***,case study on PSCAD/EMTDC validates the proposed methods.