Inorder tosolvetheproblemthatthecoordinatedplanningofthesupplysideandthedemandsideofthepower system is not effective, a numerical simulation method for the coordinated planning of the source, network, load and storage of the power system with distributed photovoltaic access is proposed. The influence of distributed photovoltaic access on power quality of power system is analyzed in depth. The interaction characteristics of power supply, network, load and storage of power system are analyzed. The numerical model of power system source, network, load and storage planning is established. The model is solved by dynamic weighted multi-objective particle swarm optimization algorithm, and the load storage collaborative planning of power system source network is realized. The numerical simulation results showthatthismethodcanimprovethevoltagefluctuationandvoltageover-limitproblemsafterdistributedphotovoltaicsare connectedtothepowersystem, andcancoordinateandmatchtheoutputofthepowersystemsupplysideandtheloadofthe demandside, andcanobtainlargerdistributedphotovoltaicsaccesscapacity.