基于改进的分层WFPN的电网故障诊断  

Grid Fault Diagnosis Based on Improved Hierarchical WFPN

作　　者：张淑卿 许迪 ZHANG Shu-qing;XU Di(School of Electrical Engineering,North China University of Science and Technology,Tangshan 063210,China)

机构地区：[1]华北理工大学电气工程学院,河北唐山063210

出　　处：《水电能源科学》2024年第10期196-200,共5页Water Resources and Power

摘　　要：针对提升电网故障诊断模型准确性和解决因模型元件增减而引起模型构建复杂的问题,提出了基于改进的分层加权模糊Petri网(WFPN)电网故障诊断方法。首先,根据故障元件及故障蔓延方向建立其故障子模型和综合模型两层模型,解决因元件增减而引起模型构建复杂度问题;其次,在主观赋值法的基础上通过优化组合赋值法对输入权值进行优化赋值,使得故障诊断结果具有较高准确性;最后,通过对14节点电力系统进行仿真分析,发现在面临信息不完备及保护或断路器拒动挑战时,WFPN电网故障诊断方法仍能够提供可靠的故障诊断结果,具有较高的容错性。Aiming at improving the accuracy of the grid fault diagnosis model and solving the complexity of model construction due to the increase or decrease of model components,an improved hierarchical weighted fuzzy Petri net(WFPN)grid fault diagnosis method based on the improved hierarchical weighted fuzzy Petri net(WFPN)is proposed.Firstly,the two-layer model of fault sub-model and comprehensive model was established according to the fault components and the direction of fault propagation,which solves the complexity of model construction caused by the increase or decrease of components.Secondly,the input weights were optimized by the optimized combination of weight method on the basis of the subjective assignment method,which makes the fault diagnosis results have a higher accuracy.Finally,through the simulation analysis of the 14-node power systems in the face of incomplete information and protection or circuit breaker rejection,the WFPN grid fault diagnosis method can still provide reliable fault diagnosis results and has high fault tolerance.

关 键 词：电网 故障诊断 分层加权模糊Petri网 容错性 

分 类 号：TM711[电气工程—电力系统及自动化]