Research on Strategies To Improve Building Photovoltaic Consumption Rate:Application Analysis Based on Energy Storage Batteries and Electric Vehicles
Buildings have abundant roof resources that can be used to install a large number of photovoltaic panels to provide electricity for buildings.However,both building power consumption and photovoltaic power generation have certain fluctuations and uncertainties,leading to a mismatch between the two and the failure to consume all generated power.The flexible load response strategy can effectively address the impact of source-load uncertainty on the power grid.This study explored the impacts of different battery capacities and the vehicle electrification rate on the self-consumption rate with a government office building selected as an example.The building has an annual electricity consumption of 550,000 kW·h and is equipped with 327 kWp of rooftop photovoltaic panels,generating about 360,000 kW·h of electricity annually,but the photovoltaic self-consumption rate(α)is only 65％.When the battery capacity reaches 50 kW·h(equivalent to 3.3％of the daily electricity consumption of the building),the corresponding α can be increased by 10％to 13％without electric vehicles and with a certain vehicle electrification rate,and the investment payback period for batteries is only 2-3 years.With the future increase of battery capacity and vehicle electrification rate,the photovoltaic self-consumption rate will continue to rise,but at a relatively slower pace.
building energy consumptionphotovoltaicselectric vehiclesenergy storage batterylow-carbon electricity consumption
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