CAJ | 학술논문

由于潮流转移过负荷、整定值不合理引起的后备保护误动跳闸可能引发大规模停电事故。针对目前研究计算和通信规模较大、没有考虑误动概率等不足，建立保护监测评估系统。首先，基于测量值和保护动作边界距离建立保护元件动作概率模型，根据传统保护系统的分布式结构构建保护运行监测评估系统架构，制定保护误动的识别流程，并简单介绍针对可能误动的保护采取的闭锁并修改保护动作特性等措施；然后分析非故障线路在某些情况下可能被误动保护切除的案例。结果表明，所提方法能够快速确定线路故障及保护动作情况，可以根据误动概率识别当前存在误动危险的保护，避免保护误动事故发生。
유우조류전이과부하、정정치불합리인기적후비보호오동도갑가능인발대규모정전사고。침대목전연구계산화통신규모교대、몰유고필오동개솔등불족，건립보호감측평고계통。수선，기우측량치화보호동작변계거리건립보호원건동작개솔모형，근거전통보호계통적분포식결구구건보호운행감측평고계통가구，제정보호오동적식별류정，병간단개소침대가능오동적보호채취적폐쇄병수개보호동작특성등조시；연후분석비고장선로재모사정황하가능피오동보호절제적안례。결과표명，소제방법능구쾌속학정선로고장급보호동작정황，가이근거오동개솔식별당전존재오동위험적보호，피면보호오동사고발생。
Misoperation of backup relays caused by flow transferring or improper settings would trigger large-scale blackouts. In allusion to deficiencies of current researches, such as the large amount of computation and communication, and without considering protection probabilities, a protection monitoring and evaluation system was established. First of all, an operation probability model of protection relays was proposed and the hierarchical protection monitoring and evaluation framework was thereafter established according to the distributed structure of traditional protection systems. The identification process of protection misoperation was proposed. Some measures for relays with misoperation risk including blocking these relays and changing protection operation characteristic are also briefly introduced. Cases with regard to non-fault transmission line removed by protection misoperation are analyzed. The results show that the proposed method could quickly confirm the fault line. It could be used to detect protective relays with misoperation risks based on operation probability to prevent protection malfunction accidents.