电网停电故障中关键线路事故链自动锁定方法设计  

Design of Automatic Locking Method for Critical Line Fault Chain in Power Grid Outage

作　　者：张健 王晓鹏 张文栋 张继勇 仇玉强 ZHANG Jian;WANG Xiao-peng;ZHANG Wen-dong;ZHANG Ji-yong;CHOU Yu-qiang(State Grid Shandong Electric Power Company,Jinan 250000 China)

机构地区：[1]国网山东省电力公司,山东济南250000

出　　处：《自动化技术与应用》2024年第10期47-51,共5页Techniques of Automation and Applications

基　　金：山东省电网科研项目(JA3705002)。

摘　　要：大型停电事故通常由电网关键线路连锁故障引起,演变成多条线路相继跳闸的情况。为有效识别出电网停电关键线路,提出一种基于事故链模型的电网停电关键线路自动化锁定方法。建立事故链理论模型,分析事故链特征关键因素;计算线路历史故障率,通过模糊性描述获得故障可能性和必要性测度结果;利用隶属度函数计算分支线路触发隐性故障的门槛值,求得故障严重程度隶属度;综合考虑线路结构和运行状态,完成关键线路的自动化锁定识别。实验证明,所提方法能够明确线路风险值和事故发生区域,实现关键线路自动化锁定,且锁定识别的准确性较高。Large blackouts are usually caused by cascading failures of key lines in the power grid,which evolve into the situation of multi-ple lines tripping one after another.In order to effectively identify the key lines of the power grid,an automatic locking method based on the fault chain model is proposed.It establishes a theoretical model of the accident chain to analyze the key factors of the characteristics of the accident chain;The historical fault rate of the line is calculated,and the measurement results of fault pos-sibility and necessity are obtained through fuzzy description;The membership function is used to calculate the threshold value of hidden fault triggered by branch lines,and the membership degree of fault severity is obtained;The automatic locking identifica-tion of key lines is completed by comprehensively considering the line structure and operation status.The experimental results show that the proposed method can identify the risk value of the line and the loss caused by accidents,realize the automatic lock-ing of key lines,and the accuracy of locking identification is high.

关 键 词：事故链模型 关键线路识别 连锁故障 故障检测 风险评估 

分 类 号：TP277[自动化与计算机技术—检测技术与自动化装置] TM711[自动化与计算机技术—控制科学与工程]