电力系统保护与控制2026，Vol.54Issue(3)：46-58,13.DOI:10.19783/j.cnki.pspc.250353
基于因果关系的新能源接入受端电网连锁故障演化路径和机理分析
Analysis of the evolution paths and mechanisms of cascading failures in receiving power grids with new energy integration based on causal relationships
摘要
Abstract
With the continuous development of ultra-high-voltage direct current(UHVDC)transmission and new energy,the coupling relationship among AC,DC,and new energy in receiving power grids has become increasingly complex.Improper handling of a single AC fault can easily lead to systematic cascading failures,posing a serious threat to the safe operation of receiving power grids.To reveal the evolution mechanisms of cascading failures in receiving power grids,this paper first derives the causal relationships among key events,including DC commutation failure,high/low voltage ride-through and disconnection of new energy sources,and DC blocking.Subsequently,the impact of DC commutation failure on the low-voltage ride-through performance of new energy under different tie-line impedances and commutation failure prevention(CFPREV)control are analyzed.Finally,based on causal relationships,the evolution mechanisms and paths of cascading failure in receiving power grids are revealed.A complex receiving-end power grid model is built in PSCAD/EMTDC,and typical cascading fault simulation cases are conducted to verify the correctness of the proposed analysis of cascading failure evolution paths and mechanisms.关键词
受端电网/换相失败/直流闭锁/新能源连锁脱网/因果关系/连锁故障演化Key words
receiving-end grid/commutation failure/DC blocking/cascading tripping of new energy/causal relationship/cascading failure evolution引用本文复制引用
李大虎,肖博,饶渝泽,周泓宇,曾鹏,姚伟,文劲宇..基于因果关系的新能源接入受端电网连锁故障演化路径和机理分析[J].电力系统保护与控制,2026,54(3):46-58,13.基金项目
This work is supported by the National Natural Science Foundation of China(No.523B2074). 国家自然科学基金项目资助(523B2074) （No.523B2074）
国网湖北省电力有限公司科技项目资助(521505230006) （521505230006）
