基于FTU故障信息的Petri网故障诊断方法

Petri net fault diagnosis method based on FTU fault information

针对基于输电网的继电保护与断路器的动作信息的建模不适用于配电网络的问题,结合配电网络的结构和运行特点,提出了基于FTU(feeder terminal unit)故障信息的Petri网建模方法。综合利用FTU上传的过电流信号和幅值量测信息,实现了配网故障诊断的快速性和容错性。根据配网的拓扑结构特点采取分层故障诊断的方法,先后诊断出故障馈线、故障单元和故障区段;采用了基于概率信息和带有抑止弧的Petri网模型,增强了网系统的模拟能力。通过对典型算例进行故障诊断,证明了此方法的有效性和可行性。

The modeling of transmission network based on the action information of relay protection and breaker does not apply to the problem of distribution network In this paper, the Petri net modeling method based on FTU （feeder terminal unit） fault in-formation is proposed, by combining the structure and operating characteristics of distribution network The rapidity and fault tolerance of distribution network fault diagnosis are both guaranteed through comprehensive utilization of the uploaded over cur-rent signal and the amplitude measurement information A hierarchical diagnosis method is adopted according to the structural characteristics of the distribution network topology, and the fault feeder, fault unit and fault section are identified successively. The probability information and Petri net with inhibitor arcs enhance the simulative ability of network system. Simulation results verifies the effectiveness and feasibility of the proposed method.