STUDYING THE EFFECT OF LOSSES COEFFICIENT ON TRANSMISSION EXPANSION PLANNING USING DECIMAL CODIFICATION BASED GA

The main goal of transmission network expansion planning (TNEP) is minimizing the network construction and operational cost while delivering safe and reliable electric power to load centers during the planning horizon. After publication of Garver’s paper, much research has been done on the field of static transmission network expansion planning (STNEP) up till now. But in all of them, the effect of losses coefficient on transmission expansion planning has not been investigated. Thus, the goal of this paper is to solve the STNEP problem considering the effect of losses coefficient on transmission networks with different voltage levels using decimal codification genetic algorithm (DCGA). Finally, the effectiveness of proposed idea is tested on Garvers 6 bus network. The results analysis show that although the losses coefficient has not any role in determining of network configuration and arrangement, but it has important effect on the rate of investment return and subsequent transmission expansion planning. Also, it can be said, considering the effect of losses coefficient in expansion planning of a transmission network with various line and substation voltage levels is caused the operational costs and therefore capital saving cost is calculated more exactly.