As observed from results, the proposed method in the paper, with increasing of the investment cost as much as 44 percent, the cost of congestion lines as much as 32 percent and average cost of cutting off the load as much as 89 percent are decreased. Only problem of the optimization method is high calculating time, because of this reason for solving above problem in personal computer need one day. In order to decreasing calculating time can choose outlet of a number selected lines instead of outlet of every single line.