Circulating current increases currents in some power lines of closed networks and decreases it in other power lines. This leads to the fact that, by restrictions of admissible currents in some lines, it is necessary to revise the composition of electricity suppliers for uniform and non-uniform closed network in order to minimize cost of purchased electricity. If in uniform network the cost is lower it is necessary to compare the benefits of supplier composition change with the cost of improving the non-uniform network. Consideration of these issues in meshed networks structurally does not differ from that in ring network. The objective function is minimum cost. The problem can be solved by simplex method involving the dual problem.