【摘要】 面向“双碳”目标，建筑是发展分布式光伏与电动汽车有序充电的重要场景。大量光伏与充电桩接入建筑配电系统，给城市低压配电网带来了巨大的增容压力。为此，提出了一种面向城市更新需求的建筑直流微电网控制方法。将柔性直流充电桩与分布式光伏连接组成直流微电网，通过充电桩功率主动调节优先消纳光伏，再将直流微电网接入建筑交流配电系统，实现与电网友好的交直流系统能量互济。该系统采用基于直流母线电压带的分散式控制方法，各变换器独立检测直流母线电压从而决定运行模式。最后通过模拟仿真验证了该方法在暂态以及全年运行中的有效性。该方法可在不额外增加建筑配电系统容量和储能设备的条件下，保障车辆充电需求并提高分布式光伏消纳率。更多还原

【Abstract】 Towards the "Carbon Peaking and Carbon Neutrality Goals’ ’, building is an ideal place for distributed photovoltaics(PV)integration and orderly charging of electric vehicles(EV). A large-scale integration of PV and EV chargers into building power distribution systems has posed increasing pressure on the hosting capacity of urban low-voltage distribution network. Therefore a control method of building DC microgrid for the purpose of urban renewal is proposed. Flexible DC(direct current) chargers and distributed PVs are integrated to a DC microgrid, where the power of the chargers is actively adjusted to prioritize PV selfconsumption. The DC microgrid is then connected to the AC(alternating current) power distribution system of a building to achieve grid-friendly energy mutual aid between the AC and DC systems. This DC microgrid adopts a decentralized control method based on a DC bus voltage band, by which each converter in the microgrid independently detects the DC bus voltage to determine its operating mode. The effectiveness of this control method in transient state and year-round operation is verified by simulation. This control method is demonstrated to ensure the EVs’ charging demand and increase the self-consumption rate of distributed PV without increasing the capacities of building power distribution systems and stationary energy storages.更多还原