基于加权模糊的时序约束Petri网电网故障诊断方法  

Fault Diagnosis Method of Power Grid Based on Weighted Fuzzy Temporal Constraint Petri Net

作　　者：程学珍 庄学山 孟璐莎 CHENG Xuezhen;ZHUANG Xueshan;MENG Lusha(College of Electrical Engineering and Automation,Shandong University of Science and Technology,Qingdao 266590,China;Coal Industry Planning Institute Co.,Ltd.,Beijing 100120,China)

机构地区：[1]山东科技大学电气与自动化工程学院,山东青岛266590 [2]煤炭工业规划设计研究院有限公司,北京100120

出　　处：《智慧电力》2023年第11期83-90,共8页Smart Power

基　　金：国家自然科学基金资助项目(62073198)。

摘　　要：电网发生故障后充分利用报警信息对故障元件进行判别,是保障电力系统安全运行的重要环节。针对现有Petri网时序推理与置信度推理相分开、计算过程复杂且未充分利用时间信息等问题,提出了一种基于加权模糊的时序约束Petri网电网故障诊断方法。将时序约束引入到Petri网的库所与变迁中,根据保护与断路器之间的动作顺序关系建立加权模糊的时序约束Petri网模型。定义置信度与时间区间分层推理运算,实现置信度推理与时序推理同步进行,在置信度推理过程中充分考虑到时间信息的影响。通过对多组算例仿真比较得出,所提方法能够有效判别出故障元件,具有较高的准确性和容错性。It is important for the safe operation of power system to make full use of the alarm information to identify the faulty components after the grid fault.Targeting the problems of the separation of temporal and confidence reasoning of Petri net,a complicated calculation process and the insufficient use of time information,the fault diagnosis method of the power grid based on weighted fuzzy temporal constraint Petri net is proposed.The temporal constraint is introduced into the place and transition of the Petri net,and the model of the weighted fuzzy temporal constraint Petri net is established according to the sequence relation of actions between protection and circuit breaker.The hierarchical reasoning operation of confidence and time interval is defined to realize the synchronization of the confidence reasoning and temporal reasoning,fully considering the influence of the time information in the process of the confidence reasoning.Through the simulation and comparison of multiple examples,it is concluded that the proposed method can identify the fault components effectively,and has high accuracy and fault tolerance.

关 键 词：电网 加权模糊 时序约束Petri网 故障诊断 

分 类 号：TM732[电气工程—电力系统及自动化]