Voltage stability of distribution network is affected by both access node position and grid-connection capacity of intermittent distribution network and unreasonable constant capacity site selection may cause voltage instability of distribution network. In view of this issue

a kind of constant capacity site selection decision method of intermittent distribution power access to the network considering voltage stability assessment is proposed in this paper. The multi-objective mathematical model is set up based on the index of voltage stability

active network loss and current margin of the distribution

the optimal access position and capacity selection scheme of intermittent distribution network based on the improved TPOSIS method is proposed and the correctness and rationality of the proposed method are verified on the Matlab simulation software. The simulation result shows that the optimal access scheme with the method proposed in this paper

compared with that selected by traditional TOPSIS method

can effectively improve voltage stability of the distribution network and has a certain instructive effect on the constant capacity of site selection of the access of the intermittent distribution power supply to the distribution network.