Fixed Value Output Scheduling Strategy of Photovoltaic-Storage System

This work proposed a scheduling strategy of photovoltaic-storage system named fixed value output scheduling strategy. Firstly, the topology of photovoltaic-storage system, its typical operation mode as well as shortcomings is introduced. The scheduling strategy and its features “fixed” output and “delayed” transmission is then illustrated. “Fixed” output endows the photovoltaic-storage system with the ability to deliver electrical energy to downstream power grid at a pre-determined constant value, while “delayed” transmission ensures the stability of the scheduling strategy. After the establishment of component simulation models, network topology construction, multi-objective optimization was carried out with the adoption of NSGA-II as multi-optimization method. Economy, low-carbon emissions and energy efficiency were selected as multi-optimization goals. Simulation results show that the proposed scheduling strategy can efficiently enhanced system’s solar photovoltaic utilization rate, which was introduced as a indicator for evaluating the energy-efficiency of a system, and reduced the frequency of switching the operating status of user-side energy storage devices.