Two Stage Operation Optimization of Active Distribution Network Based on IMOHS Algorithm

In order to solve the problem of optimal dispatching between source, network and flexible loads, and improve the safety and stability operation level of distribution network, this paper proposes a two stage multi-objective control method for distribution network. The first stage optimization control is the day ahead scheduling, the control objectives is source and load balance, and minimum of the longest path of feeder in distribution network. The second stage is hourly control, the control objectives of static voltage stability margin and the active power loss are used to effectively improve the coordination, safety, and economy of distribution network. An improved multi-objective harmony search algorithm is proposed to solve this two stage multi-objective optimization model. Finally, the effectiveness of the proposed two stage multi-objective control method is verified by IEEE 33 bus system with distributed generations.