基于改进Petri网模型的电网故障诊断新方法

将Petri网理论用于电网故障诊断中,提出了一种改进的Petri网故障诊断模型。分别以线路和母线为例说明了Petri网模型的构建方法、推理过程及解析表示方法。该方法对于电网的单一故障、多重故障及存在保护和断路器不正确动作等情况的严重故障均能快速准确地定位故障元件,自动给出可靠有效的诊断结果,适用于电力系统在线故障诊断。在四平地区电力系统中的测试结果证明了基于该模型的故障诊断系统的实用性和有效性。

Improved Petri Net Models Based Fault Diagnosis Approach for Power Networks

The authors apply Petri net theory to power system fault diagnosis and propose an improved Petri net based fault diagnosis model. The construction method, reasoning process and analytical expression of Petri net are illustrated by using transmission line and busbar as examples. For single fault, multiple fault and serious fault in which the maloperation of protection and circuit breaker exists, the faulty components can be rapidly and accurately located by the proposed method, and reliable and effective diagnosis result can be automatically given. Thus, the proposed method is suitable to on line diagnosis of power system fault. The testing results in Siping regional power system show that the fault diagnosis system based on the proposed model is practicable and effective.