A novel linear regression density peak clustering-based transmission line protection for line-commuted converter-voltage source converter hybrid high voltage direct current system  

作　　者：Shunguang Lei Hongchun Shu Zhimin Li Yinan Hu Xincui Tian Taiwen Liu 

机构地区：[1]School of Electric Engineering and Automation,Harbin Institute of Technology,Harbin,Heilongjiang,China [2]Department of Electric Engineering,Kunming University of Science and Technology,Kunming,Yunnan,China

出　　处：《High Voltage》2024年第5期1159-1170,共12页高电压（英文）

基　　金：National Natural Science Foundation of China,Grant/Award Number:52037003;Key Science and Technology Special Plan Project of Yunnan,Grant/Award Number:202002AF080001。

摘　　要：Line-commuted converter(LCC)-voltage source converter(VSC)hybrid high voltage direct current(HVDC)transmission system is an innovative technology,the existing LCC and VSC protection require setting,and it is difficult to be directly applied in the LCC-VSC hybrid HVDC,which is a serious problem in practical engineering.A novel linear regression density peak clustering(LRDPC)approach is introduced for transmission line protection.LRDPC employs Least Squares linear regression to compute the fault current slope,followed by density peak clustering for fault type identification.The proposed protection structure is straightforward and setting-less,eliminating the need for fault pole selection elements and classification thresholds.Validation on the Kun-Liu-Long LCC-VSC HVDC RTDS system demonstrates the method's effectiveness in identifying diverse faults under varying conditions,including fault types,locations,resistances,and signal-to-noise ratios.Notably,it remains robust against fault impedance(600Ω)and noise interference(20 dB).

关 键 词：FAULT CONVERTER SYSTEM 

分 类 号：TM721.1[电气工程—电力系统及自动化]