CAJ | 학술논문

当电力系统一次设备发生故障时,如果发生保护和/或断路器拒动或误动的情况,则会导致停电区域扩大,进而增加故障诊断的复杂性.现有的电力系统故障诊断解析模型是在保护和断路器正常动作的基础上建立的,没有系统地考虑其误动或拒动的情况.在此背景下,以现有的电力系统故障诊断解析模型为基础,通过系统地计及保护和断路器发生误动与拒动的可能性,发展了故障诊断问题的新的数学模型.该模型不仅能够诊断出故障设备,还可以识别出误动或拒动的保护和/或断路器以及漏报或误报的警报.开发了相应的实用软件系统,并用实际电力系统发生的故障案例进行了仿真测试.
당전력계통일차설비발생고장시,여과발생보호화/혹단로기거동혹오동적정황,칙회도치정전구역확대,진이증가고장진단적복잡성.현유적전력계통고장진단해석모형시재보호화단로기정상동작적기출상건립적,몰유계통지고필기오동혹거동적정황.재차배경하,이현유적전력계통고장진단해석모형위기출,통과계통지계급보호화단로기발생오동여거동적가능성,발전료고장진단문제적신적수학모형.해모형불부능구진단출고장설비,환가이식별출오동혹거동적보호화/혹단로기이급루보혹오보적경보.개발료상응적실용연건계통,병용실제전력계통발생적고장안례진행료방진측시.
When a fault occurs on a section or a component in a given power system, if some or all protective relays (PRs) and circuit breakers (CBs) associated do not work properly, or in other words, a malfunction or malfunctions are happening with these PRs and/or CBs, the outage range could be significantly extended. As a result, the complexity of fault diagnosis could be increased. The existing analytic models for power system fault diagnosis do not systematically address the possible malfunctions of PRs and CBs, and hence may lead to incorrect diagnosis results if such malfunctions do occur. Given this background, based on the existing analytic models, an effort is made to develop a new analytic model to well take into account of the possible malfunctions of PRs and CBs, and further to improve the accuracy of fault diagnosis results. The developed model could not only estimate the faulted section(s), but also identify the malfunctioned PRs and CBs as well as the missing and/or false alarms. A software system is developed for practical applications, and realistic fault scenarios from an actual power system are served for demonstrating the correctness of the presented model and the efficiency of the developed software system.