The construction of distribution networks depends on available resources of power corridors. The reasonable planning of the power corridor will affect the economy of later construction of distribution networks. To scientifically guide the power corridor planning

a path description based method for power corridor planning is proposed. Firstly

a power corridor connectivity model is built

according to the relationship between the power corridor and the distribution network frame. The set of power-feeding paths is obtained using the depth-first traversal algorithm. The effectiveness of the power corridor planning scheme is evaluated by the comprehensive planning cost. Next

a bi-level optimization model of power corridors in distribution networks is formed based on the thought of decomposition and coordination. Finally

a nested discrete particle swarm optimization(PSO)algorithm is used to solve the problem. The outer layer of PSO algorithm takes the minimum cost of power corridor planning as the optimization objective

and the inner layer of PSO algorithm takes the minimum cost of distribution network planning as the optimization objective. The simulation studies show that the proposed model can give consideration to the feasibility and economy of the later distribution network construction and get the optimal planning of electric corridors satisfying the load demand

which will benefit the protection of the corridor site and provide a reference for the construction of the distribution network.