摘要
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。
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.
出处
《电力系统自动化》
EI
CSCD
北大核心
2009年第24期6-10,42,共6页
Automation of Electric Power Systems
基金
国家自然科学基金资助项目(50477029)
国家科技支撑计划资助项目(2008BAA13B10)~~
关键词
故障诊断
解析模型
警报信息
保护和断路器误动或拒动
fault diagnosis
analytic model
alarm message
malfunctions of protective relays and circuit breakers
