利用保护、断路器状态信息进行电网故障的诊断

利用故障诊断数学模型,在深入分析电网故障保护、断路器状态信息结构的基础上,提出了相应关联矩阵运算方法,以便快速、准确地找到故障元件;同时,利用保护和断路器信息的故障诊断解析模型,在数学上是一个无约束0～1整数规划模型.该方法克服了传统的数据存储手段,在节省计算机资源,提高运算速度方面具有一定的优势;同时,具有通用性,能够在保护或者断路器拒动作或误动作的情况下,仍能正确地处理故障区域判断问题.通过一个简单的电网结构图在几种不同的故障情况下的仿真实验,证明了所提出的矩阵算法是正确合理的.

Method and realization for fault section estimation using information from circuit breakers and protective relays

In this paper, after deeply analysing the information from circuit breakers and protective relays using arithmetic model when a fault occurred in power system, it proposed a new associated-matrix algorithm for quick and accurate diagnosis. The well-developed parsimonious set covering theory was applied to the fault-section estimation problem, and a 0- 1 integer programming model was obtained. The proposed method is versatile and can deal with uncertainties in fault-section estimation, such as protective relay failures and/or malfunction and circuit breaker failures and/or malfunction. The method proposed have advantages on processing speed and saving computer space. The results of simulation calculation examples show that the presented mathematical algorithm is feasible and efficient.