The invention relates to the technical field of electric vehicle charging piles, in particular to a bidirectional charging pile multi-vehicle pile unit area emergency power supply method, which comprises the following steps of: constructing a topology and control framework for multiplexing a bidirectional charging pile as an area emergency power supply; when a power grid is powered off, based on a topology and control architecture, the bidirectional charging piles adopt a multi-vehicle multi-pile networking control strategy to construct a micro-grid, and a load switch is closed to supply three-phase four-wire power to a transformer area load; when the power grid operates normally, the grid side switch and the change-over switch are switched on, the load switch is switched off, and the parallel three-phase alternating current side of the grid side inverter is directly connected to the three-phase line of the load bus. According to the topology and control architecture used in the invention, a multi-vehicle multi-pile networking control strategy can be used to support the voltage and frequency of the whole transformer area in an off-grid manner when the power grid is powered off, and autonomous dynamic distribution of the emergency power supply power of the transformer area among the multi-vehicle-pile units is realized; meanwhile, loss of the isolation transformer is avoided when the power grid is normal, and high efficiency of the system is guaranteed.
本发明涉及电动汽车充电桩技术领域,尤其是涉及一种双向充电桩多车桩单元台区应急供电方法,所述方法包括如下步骤:构建把双向充电桩复用为台区应急电源的拓扑与控制架构;在电网停电时,基于拓扑与控制架构,双向充电桩采用多车多桩构网控制策略来构建微电网,负荷开关闭合为台区负荷进行三相四线供电;当电网正常运行时,网侧开关和切换开关闭合,负荷开关断开,将网侧逆变器的并联三相交流侧直接连接到负荷母线的三相线。本发明使用的拓扑与控制架构可以在电网停电时使用多车多桩构网控制策略来离网支撑整个台区的电压与频率,并实现台区应急供电功率在多车桩单元间自主动态分配;同时,在电网正常时避免了隔离变压器损耗,保证了系统高效率。
Emergency power supply method for multi-vehicle-pile-unit zone area of bidirectional charging pile
一种双向充电桩多车桩单元台区应急供电方法
2024-10-25
Patent
Electronic Resource
Chinese
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