Control of PV-EV charger-building microgrid based on DC bus voltage band
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 self-consumption.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.
DC microgridDC bus voltage banddistributed photovoltaicsEV chargerdecentralized control
万方数据
维普
