Reasonable planning of distributed generation and energy storage in distribution network considering economy and operation constraints of grid is an important solution to improve renewable energy utilization rate and consumption capacity. A kind of double-layer optimization method for siting and sizing distributed generation and energy storage in distribution network is proposed. The inner layer considers the timing sequence characteristics of renewable energy and energy storage battery and determines operating consumption scheme based on the daily optimal power flow and virtual dispatching. While

the outer layer uses the particle swarm optimization algorithm

determine optimal configuration based on the operation scheme and with comprehensive consideration of voltage deviation

power operation cost and energy abandonment penalty so to improve consumption capacity of distribution network. The effectiveness of the proposed method is demonstrated by using simulation example on the IEEE 33 node distribution network system.