Optimal Scheduling Strategy with Multi-time Scales for PV-Storage Based Charging Station

With the rapid development of photovoltaic power generation and electric vehicles (EVs), the PV-storage based charging station as well as its economic and safe operation have received more attention. In order to reduce the adverse effects of disorderly charging of electric vehicles on the stable operation of the distribution network, an orderly charging optimization model considering the benefits of electric vehicle (EV) users and the distribution network to minimizing the daily operating cost of PV-storage charging station is established in this article. On this basis, a multi-time-scale coordinated optimization control strategy is proposed, which will update the operation of the charging station on the two time scales of day-ahead (long-term) and intra-day (short-term) based on model predictive control (MPC). Finally, the simulation analysis is carried out in combination with the charging station in a park type micro-grid (MG) system. The experimental results verify that the optimization strategy can effectively improve the safe and economic operation level of the charging station during the dynamic real-time operation process, realize the orderly charging of the charging load, improve the ability to absorb renewable energy and ensure an optimal balance between charging demand and energy supply in this system.