Distributed Photovoltaic-Storage System Optimization Planning Considering Flexible Resources in Smart Distribution Network

As more and more distributed generation are widely integrated to the distribution network, the risk of node voltage and power flow exceeding the limits is greatly increased. The installation of energy storage can suppress the fluctuation of renewable power output and promote the distributed generation consumption. A distributed photovoltaic-storage system optimization planning method based on day ahead economic dispatch is proposed. Its characteristic is to use the second-order cone to model the flexible resources in source-network-load-storage. Through the analysis of IEEE 33 bus system, it is found that part of the output of the DG is abandoned and the installation of ES can improve the power supply income of the distribution system.