Annual replacement decision-making of electrical equipments in distribution network

Recently, most methods for replacement decision-making of electrical equipments in distribution network have some limitations like insufficient concern with reliability and economy. As a solution, a new method considering both network reliability and equipment economy is presented in this paper. It consists of two parts: equipment-replacing necessity decision-making, which is used for all electrical equipments to select annual replacing ones in the network with equipment-replacing probability index, aiming at reliable power supply; and equipment-replacing option decision-making, which is used for each replacing equipment to find out the best replacing option among three alternatives with equipment-replacing B/C ratio index, considering its performance improvement. The proposed method is successfully applied to Shanghai Siping Community, and contributes valuable reference to its annual replacement plan of electrical equipments in distribution network.