Design And Development Of Power Grid Accident Processing System Based On Predicate Logic

With the development of social economy and the expansion of power grid scale,the reliability of power grid operation becomes more and more important;In particular,the rapid identification and recovery of the failed equipment after the accident is the key to ensure the safe and stable operation of the power grid;Besides,with the continuous promotion of smart grid construction,the dispatching center has basically realized informatization and automation,and completed the transformation from empirical dispatching to analytical dispatching.Combined with the above background,it is quite necessary and practical to realize intelligent decision-making and handling of accidents by using artificial intelligence technology.Based on the function of the existing dispatching platform,this paper designs and develops the fault intelligent identification and closed-loop execution system for power grid accidentsFirstly,this paper designs the functional architecture of the system.According to the actual accident handling process,build relevant functional modules and explain the calling relationship and technical route between them.Then,based on the EMS and OMS system of the scheduling platform,the data interaction format and interface scheme between the systems are constructed.After that,the related principles of the intelligent decision-making part of the system are described.Based on the expert system architecture,the system realizes the judgment of power grid fault and the generation of post fault scheme;Combined with predicate logic and objectoriented idea,this paper classifies the objects of power grid equipment,defines the attributes and relations among the objects,and establishes the knowledge model of power grid equipment objects;And through the production rule to express the relevant rules of fault processing.Then,a reasoning method of fault chain considering uncertain factors is designed based on the knowledge representation model,aiming at the situation of fault message misinformation and maloperation of related equipment;Firstly,the principle of message checking is given according to the correlation of different types of fault messages,then the action logic of primary and secondary equipment is expressed as rules to infer the fault chain of suspected fault equipment within the fault range,and finally the diagnosis result is given by calculating the probability of fault occurrence.Finally,the specific implementation of the system is illustrated with practical cases.First,the interface design of the system is explained,and then the actual line fault case and main transformer fault case are used to test the whole processing process of the system,and the intelligence and effectiveness of the system are verified from the basic consistency of processing effect and artificial processing.