The Design And Application Of The Database For Condition Based Maintenance Of Distribution Network Equipment

The secure and stable operation of electrical equipment is crucial to the reliability ofthe whole power system, therefore, equipment maintenance is necessary to normaloperation of electric power system. With distribution network enlarging and devicecategory increasing, traditional afterwards maintenance or regular maintenance fails tosatisfy the requirements of the modern intelligent power grid. In order to ensure theequipment reliability, reduce the degree of blindness and cost of repair, and improve thescientific rationality of maintenance, condition based maintenance (CBM) becomes thetrend of new type maintenance. The preconditions of CBM are estimating the condition,defect, growing trend of the equipment and designing a rational repair plan accordingly,which will also cost much manpower and material resources when the online testingdevices of distribution network fail to completely cover. Based on this fact, researchingand developing an aid decision making system of equipment CBM, which combines theinformation management, standard management, condition evaluation, repair planmaking and repair process management, play an important role in proceeding equipmentCBM.In accordance with distribution network CBM standard enacted by State GridCorporation of China and combined with the actual situation of a city distributionnetwork, this article introduces the design, development of the CBM and its function inevery aspect. It also explains the trend prediction of equipment CBM status in systemdeveloping and backend database module. According to data type and actual demand,Grey Theory Prediction Model and Oracle are chosen to predict the trend and manage thedatabase. In the last part, every interface and its function are introduced briefly. ThisCBM system has been put into practical application and spoken highly of by the users.