基于Petri网和故障树的电力系统故障诊断模型

Fault Diagnosis Model of Electric Power Systems Based on Petri Nets and Fault Tree Analysis

摘要:

电力系统元件发生故障后,继电保护动作发出信号使相连的断路器断开,有效地保护了元件,但是也为故障的诊断增添了困难。本文针对带有主保护和后备保护的电力系统故障诊断建模困难复杂等问题,提出用故障树分析法对核心故障建模,并将故障树模型转换为对应的Petri网模型,运用Petri网的状态转移方程进行矩阵运算,不仅清晰的表示了故障的发生和形成,也能快速准确的诊断出故障发生元件,降低诊断的复杂性。实例分析说明了该方法准确性和有效性。

Abstract:

Aiming at the problems of modeling for electric power systems with main protection and back-up protection, a fault tree analysis method was proposed through modeling the core fault. This model shows happening and formation of failure clearly, but fault tree suffers limited and hindering with the problem of NP. It also has low efficiency when traversing and searching. So changing fault tree model to Petri net model which can use state transition equation conduct matrix operation, Quickly and accurately diagnosed failure element, reduce the complexity of the diagnosis. An example of electric power systems provided to demonstrate the diagnosis method which simple and effective.