The invention discloses a bidirectional charging topological structure of an electric vehicle and a control method, the bidirectional charging topological structure can work in a constant current mode or a constant voltage mode to charge a power battery of the electric vehicle, and can also be converted into a power generation state to feed electric energy of the power battery back to a power grid to realize peak clipping and valley filling in a power utilization peak period; the power grid stability is maintained. Almost all switches in the topology work in a soft switching state, very high operation efficiency can be realized, and an interleaving parallel structure in the topology not only ensures that the system can realize fault-tolerant operation, but also can greatly reduce higher harmonics. Secondly, according to the control method, various possible operation modes are considered, so that the converter can operate in a constant current mode, a constant voltage mode or a constant power mode, and the contained soft start control ensures that the converter does not have impact current when being started; the included energy reversal control ensures that the converter can be smoothly switched between a charging mode and a power generation mode.
本发明公开了一种电动汽车双向充电拓扑结构及控制方法,双向充电拓扑结构既可以工作在恒流模式或恒压模式下,实现对电动汽车动力电池的充电,也可以在用电高峰时期,转为发电状态,将动力电池电能回馈至电网,实现削峰填谷,维持电网的稳定性。拓扑中几乎所有的开关均工作在软开关状态下,可以实现很高的运行效率,拓扑中的交错并联结构既保证系统能够实现容错运行,也可大幅降低高次谐波。其次,本发明的控制方法考虑了各种可能的运行模式,可以使变换器运行在恒定电流模式、恒定电压模式或恒定功率模式下,所包含的软起动控制保证了变换器在启动时没有冲击电流,所包含的能量反转控制保证了变换器在充电模式与发电模式之间能够平滑切换。
Bidirectional charging topological structure of electric vehicle and control method
一种电动汽车双向充电拓扑结构及控制方法
2024-11-22
Patent
Electronic Resource
Chinese
IPC: | H02J CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER , Schaltungsanordnungen oder Systeme für die Abgabe oder Verteilung elektrischer Leistung / B60L PROPULSION OF ELECTRICALLY-PROPELLED VEHICLES , Antrieb von elektrisch angetriebenen Fahrzeugen / H02M APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS , Anlagen zur Umformung von Wechselstrom in Wechselstrom, von Wechselstrom in Gleichstrom oder umgekehrt, oder von Gleichstrom in Gleichstrom und zur Verwendung in Netzen oder ähnlichen Stromversorgungssystemen |
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