A Commutation Failure Prediction and Mitigation Method  

作　　者：Renlong Zhu Xiaoping Zhou Haitao Xia Lerong Hong Hanhang Yin 

机构地区：[1]College of Electrical and Information Engineering,Hunan University,Changsha 410082,China

出　　处：《Journal of Modern Power Systems and Clean Energy》2022年第3期779-787,共9页现代电力系统与清洁能源学报（英文）

基　　金：supported by the National Natural Science Foundation of China(No.51907058);Project of Hunan Power Co.,Ltd.of the State Grid Corporation of China(No.SGTYHT/18-JS-206);Natural Science Foundation of Hunan Province(No.2020JJ5081)。

摘　　要：The mitigation of commutation failure(CF)depends on the accuracy of CF prediction.In terms of the large error of the existing extinction angle(EA)calculation during the fault transient period,a method for CF prediction and mitigation is proposed.Variations in both DC current and overlap angle(OA)are considered in the proposed method to predict the EA rapidly.In addition,variations in critical EA and the effect of firing angle(FA)on both DC current and OA are considered in the proposed method to obtain the accurate FA order for the control system.The proposed method can achieve good performance in terms of CF mitigation and reduce reactive consumption at the inverter side when a fault occurs.Simulation results based on the PSCAD/EMTDC show that the proposed method predicts CF rapidly and exhibits good performance in terms of CF mitigation.

关 键 词：Commutation failure prediction commutation failure mitigation line commutated converter based high-voltage direct current(LCC-HVDC) extinction angle(EA) overlap angle(OA) firing angle(FA) 

分 类 号：TM721.1[电气工程—电力系统及自动化]