基于扩展时间Petri网和故障信息网的保护动作分析方法

Protection action analysis method based on extended time Petri net and fault information networks

继电保护动作信息是电网故障后故障诊断和事故分析最重要的依据,随着继电保护和故障录波信息网的建立,丰富的录波信息为保护动作分析提供了基础。Petri网理论具有完善的理论证明依据,是离散动态系统建模的有效工具。文中提出了一种基于扩展时间Petri网(ETPN)的继电保护动作过程建模,综合利用故障信息,利用Matlab进行保护动作行为分析的方法。算例结果表明,该方法进行保护动作行为分析清晰直观、有效。

Protection action information is the important evidence for fault diagnosis and accident analysis. Along with the establishment of the information network for protective relaying and fault recorders, the plentiful recorded fault data lay a foundation for protection action analysis. The Petri net is efficient to model DEDS（discrete event dynamic systems） due to its full-developed theories. The protection action analysis method is proposed, in which the action processes of protection relaying are modeled based on the extended time Petri net （ETPN）, the fault information is made good use Of, the Matlab is adopted for dynamic simulation. Results of an example demonstrate the protection action analysis method is intuitional and effective.