Abstract
A novel scheme of charging-discharging-storage integrated station is put forward. In order to control energy/power flowing in the integrated station effectively, a new definition of general energy is fully discussed and its periodic characteristic is analyzed. General energy includes three parts: general energy of battery supply system, general energy of battery echelon utilization system and general energy of EVs, all of which is almost periodic. After analyzing steady operation curves of the three parts of general energy, their interrelation is discussed. On this basis, a periodic control strategy for general energy is proposed. Taking typical bus operation in Shanghai as a case, general energy curves of battery systems and EVs are described and analyzed under periodic control strategy, which obviously shows that the integrated station can maintain stable and economic operation by periodic control of general energy flowing in the integrated station.
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