一种应用于500 kV 3/2接线系统的层次性变迁WFPN故障诊断方法

A Fault Diagnosis Method for 500kV One-and-a-half Connection System Based on Hierarchical Transition WFPN

3/2接线方式可靠性高、检修方便,在500 kV输电系统中获得了广泛的应用。在传统Petri网的基础上,结合故障的层次性与方向性原理、高斯分布系数与500 kV 3/2接线系统保护配置,设计了一种针对3/2接线系统的新型层次性变迁WFPN故障诊断模型。同时考虑到死区故障的存在,防止因死区故障而造成的误判,设计了一种新的拓扑结构。在确定故障元件后,基于模型又设计了一种反向搜索方式,能自动给出元件相关保护与断路器是否故障的简单报告。该故障诊断方法原理简单,可拓展性高,当故障发生时能快速自动得出故障报告,具有比较高的容错性。对调度端的故障判别与自愈性电网发展具有一定帮助。

One-and-a-half connection mode is a method with high reliability, convenient for overhauling, therefore it is widely applied in 500 kV power transmission system. Based on traditional Petri net and combined with hierarchical and directional principle of fault, Gaussian distribution and the protective relaying configuration for 500 kV one-and-a-half connection system, this paper designs a new pattern of fault diagnosis method for 500 kV one-and-a-half connection system based on hierarchical transition WFPN. Meanwhile, considering existence of dead-zone fault, a new topology is designed to prevent misjudgment caused by dead-zone fault. After confirmation of fault components, a reverse searching method is also designed, able to automatically issue a simple report on the fault of related protective relays and circuit breakers. The fault diagnosis method has the advantages of simple principle and high expandability. It can quickly and automatically obtain a malfunction report at fault occurrence with relatively high fault tolerance. It is helpful for identification of the fault at dispatcher and development of self-healing power grid.