Abstract：In order to balance the output difference between renewable energy and load in the active

distribution network and reduce the budget cost and user purchase cost，an optimal dispatching method of

distributed generation units in the active distribution network based on power demand side response was proposed.

On the premise of power demand side response，set the optimal dispatching priority of distributed generation units，combined with the objective function established with the total generation cost of active distribution network as the minimum objective，set the node voltage，power flow process，state of charge of energy storage system and power limit constraints of flexible load in all time periods of the active distribution network dispatching cycle，on this basis，the optimal dispatching model of active distribution network distributed generation units was constructed.Finally，the improved particle swarm optimization algorithm was used to solve the model and obtain the final optimized scheduling result. The experimental results show that the proposed method can effectively balance the difference in power generation output between renewable energy and load，which not only improves the absorption capacity of active distribution networks for renewable energy，but also reduces power generation budget expenses and user purchase costs.

      Key words：power demand side；active distribution network；distributed generation unit；improved particle

swarm optimization algorithm；optimize scheduling；source dutch win-win situation