摘要
针对容错Petri网电网故障诊断模型未考虑近后备保护对模型的影响,以及网络拓扑结构变化时模型的可移植性较差等问题,提出了容错Petri网电网故障诊断的改进模型.通过引入近后备保护以及一个模拟近后备保护控制的断路器的虚拟库所,使改进后的模型更加直观,能够全面反映保护系统的各种动作逻辑.且沿故障候选元件的各个故障蔓延支路分别建立模型,网络拓扑结构变化时只须添加或删除相应支路的故障诊断子模型,无须修正关联矩阵.算例仿真结果表明:改进模型简单,具有良好的通用性和可移植性,且推理结果可直接用于评价保护系统的动作特性.
As the existing fault-tolerant Petri nets don not consider the influence of local backup relay on the model of power grids fault diagnosis,and their bad portability when the topology changes,thus,an improved fault-tolerant Petri net model was proposed.Local backup relay and a virtual place used to simulate the circuit breaker controlled by the local backup relay were introduced into the improved model,making it more intuitive and can comprehensively reflect different operation logics of protection system.In addition,the model was built on every spread direction of a candidate failure element.When the power grid′s topology changes,it is unnecessary to revise the associated matrix just adding or deleting the corresponding fault diagnosis model of the spread direction.Simulation results indicate that the improved model is simple,and has high versatility and portability.Moreover,the results can directly be applied to evaluate the operation characteristics of the protection system.
出处
《华中科技大学学报（自然科学版）》
EI
CAS
CSCD
北大核心
2013年第1期11-15,共5页
Journal of Huazhong University of Science and Technology(Natural Science Edition)
基金
国家自然科学基金资助项目(50907024)
关键词
电力系统
电网
故障诊断
容错Petri网
改进模型
power systems
power grids
fault diagnosis
fault-tolerant Petri net
improved model
