基于Petri网和故障树的变电站故障诊断方法

针对变电站的设备组成及联接特点,利用Petri网(PN)的图形特性,提出了一种基于Petri网和故障树的变电站故障诊断模型和诊断方法.利用PN建立了可能性故障区域诊断模型,利用PN和故障树建立故障元件诊断模型.详细给出了变电站可能的故障区域诊断方法和变电站故障元件诊断方法.在故障元件的诊断中,建立了针对可能故障区域的面向设备的子Petri网模型,降低了诊断的复杂性.仿真研究表明,利用该方法可以比较容易实现变电站故障诊断系统,且有高的准确性和诊断效率.

An Approach to Substation Fault Diagnosis Based on Petri Net and Fault Tree

Aiming at the equipment construction and the linking characteristic of substations,a method for substation fault diagnosis based on Petri Net(PN) and fault tree is put forward.First,the possibility fault area diagnosis model based on PN is built,the diagnosis model of fault components is set up based on PN and fault tree.The diagnosis methods for fault area and fault components are described in detail.The equipment-oriented PN-based submodels are set up for the possible fault area,so the complexity of diagnosis is reduced.The simulation results indicate that the fault diagnosis can be realized easily using this method,and has high veracity and efficiency.