Identification of Critical Hidden Failure Line Based on State-failure-network  

作　　者：Linzhi Li Lu Liu Hao Wu Yonghua Song Dunwen Song Yi Liu 

机构地区：[1]College of Electrical Engineering,Zhejiang University,Hangzhou,China [2]Department of Electrical and Computer Engineering,University of Macao,Macao,China [3]China Electric Power Research Institute,Beijing,China [4]State Grid Henan Electric Power Company,Zhengzhou,China

出　　处：《Journal of Modern Power Systems and Clean Energy》2022年第1期40-49,共10页现代电力系统与清洁能源学报（英文）

基　　金：This work was partly supported by the State Grid Corporation of China(No.SGTYHT/17-JS-199XT71-18-019).

摘　　要：The hidden failures generally exist in power systems and could give rise to cascading failures.Identification of hidden failures is challenging due to very low occurrence probabilities.This paper proposes a state-failure-network(SF-network)method to overcome the difficulty.The SF-network is formed by searching the failures and states guided by risk estimation indices,in which only the failures and states contributing to the blackout risks are searched and duplicated searches are avoided.Therefore,sufficient hidden failures can be obtained with acceptable computations.Based on the state and failure value calculations in the SF-network,the hidden failure critical component indices can be obtained to quantify the criticalities of the lines.The proposed SF-network method is superior to common sampling based methods in risk estimation accuracy.Besides,the state and failure value calculations in the SF-network used to re-estimate the risks after deployment of measures against hidden failures need shorter time in comparison with other risk re-estimation methods.The IEEE 14-bus and 118-bus systems are used to validate the method.

关 键 词：Blackout risk cascading failure hidden failure state-failure-network method 

分 类 号：TM73[电气工程—电力系统及自动化]