Distribution system long-term planning in a restructured power system

In this paper, a long-term distribution system planning model is presented considering technical and economical constraints. The proposed optimization model studied distribution system planning in a competitive environment, considering all network equipments including feeders, substation, intertie and DISCO-owned or SPP(small power producer)-owned DGs in different technologies and created a comprehensive framework for long-term distribution system planning according to the planner experimental decisions. Presented cases in electrical market tested on 32 bus distribution system confirm the effectiveness of the proposed model and have investigated the impact of existence of different energy sources in system operation and economics.