Photovoltaic energy storage electric vehicle charging station system based on direct current bus

The utility model discloses a photovoltaic energy storage electric vehicle charging station system based on a direct current bus. The system comprises the direct current bus, a photovoltaic system, an energy storage system, a charging system, a direct current/alternating current (DC/AC) inverter, an AC/DC rectifier and a DC/DC converter, an input end of the AC/DC rectifier is connected with an AC power distribution network, an output end of the AC/DC rectifier is connected with the direct current bus, an input end of the DC/AC inverter is connected with the direct current bus, an output end of the DC/AC inverter is connected with the AC power distribution network, the charging system is connected with the direct current bus, and the photovoltaic system and the energy storage system are connected with the direct current bus respectively through the DC/DC converter. According to the photovoltaic energy storage electric vehicle charging station system based on the direct current bus, the voltage of the direct current bus is merely required to be controlled, the performance requirements of the system can be easily met, the control algorithm is relatively easy, intermediate links of the inverter can be reduced, the system loss is decreased, the overall efficiency is improved, a main wiring structure of the system is simplified, besides, a distributed direct current bus control is utilized, and thereby the system is easy to extend.