A Charging Optimization Strategy on Charging and Swapping Station for Electric Buses Based on Optimization of Switching Rules and Matching of Buses and Batteries

Considering the flexible switching rules, the separation between buses and batteries of the electric buses switching mode, and the coexistence of regularity and uncertainty in the operation of buses, this paper proposed a two-stage optimized charging strategy combining day-ahead optimization with real-time dynamic correction based on the optimization of switching rules and matching of batteries and buses. Firstly, establish the switching rule model and the buses swapping demand and batteries charging demand model were established based on the switching rule. And this paper established matching indexes and proposed a matching strategy for batteries demand of electric buses and charging demand of batteries by entropy weight method. On this basis, the day-ahead optimization strategy ensured the minimization of the charging cost and the fluctuation of charging load curve by joint optimization of switching rule and charging power. The real-time dynamic correction strategy corrected the charging power and dealt with abnormal situation. Finally, through simulation verification on the proposed strategy, results show that the proposed optimization strategy can reduce the charging cost and stabilize the fluctuation of charging load curve of the charging and swapping station, and cope with the actual operation uncertainty and abnormal situation of electric buses effectively. It provides strong support for safe and economic operation of charging and swapping station for electric buses. © 2019 Chin. Soc. for Elec. Eng.