Maintenance Scheduling Of Distribution Equipments With Optimal Economy And Reliability

With the continuous expansion of power distribution grid, the number of distributionequipments has become larger and larger. In order to make sure that all theequipments can operate reliably, a large amount of maintenance tasks should beconducted. Therefore, maintenance scheduling of distribution network is an importantcontent, which has significant influence on reliability and economy of distributionnetwork operation. However, the study of distribution equipments’ maintenancescheduling at present only considers the maintenance economical efficiency, rarelyconsiders the effect of maintenance plan of power system reliability, which is easy toincrease the power grid operation risk and bring enormous loss to supply enterprisesand users.This paper establishes the health evaluation model of distribution equipment based onthe fuzzy comprehensive variable weight theory. Then, the distribution equipmentmaintenance strategy is optimized considering operating loss, investment loss andequipment fault loss. After that, this paper proposes a new model for maintenancescheduling which considers load loss, grid active power loss and system risk asobjective functions. On this basis, Differential Evolution algorithm is adopted tooptimize equipment maintenance time and load transfer path. In the following, theinfluence to power distribution equipment maintenance plan with different DG outputis studied. Finally, the general distribution network of33nodes is taken for examplewhich shows the maintenance scheduling model’s effectiveness and validity.