Photovoltaic charging station charging control method and device based on weather prediction

Abstract

The invention discloses a photovoltaic charging station charging control method and device based on weather prediction. The method comprises: acquiring a weather prediction data set; adjusting the maximum energy storage discharge power of an energy storage battery in the photovoltaic charging station on that day according to the weather prediction data set so as to determine the initial maximum energy storage discharge power; according to a preset step length, dividing the initial energy storage maximum discharge power to obtain a plurality of discharge powers, acquiring historical data of thepower distribution network; predicting a load curve of the power distribution network on that day; in each preset time period of the current day, according to the load curve, the in-station vehicle charging demand data and the photovoltaic power generation data of the photovoltaic charging station, obtaining the power purchase cost of each power grid when power is purchased from the power distribution network under each discharge power, and taking the discharge power corresponding to the lowest power purchase cost of the power grid as the maximum energy storage discharge power of the currentday; and according to the energy storage maximum discharge power of the day and the current time period, orderly charging the vehicles in the station based on a time-phased charging strategy.

Description

technical field [0001] The present application relates to the technical field of electric power control, in particular to a method and device for controlling charging of a photovoltaic charging station based on weather forecast. Background technique [0002] A photovoltaic charging station is a charging station that converts light energy into electrical energy for storage and is used to charge new energy vehicles. On the one hand, it can realize the local consumption and utilization of renewable energy, effectively improve the utilization rate of renewable energy, and reduce carbon emissions. On the other hand, it can reduce the burden brought by the development of electric vehicles on power grid construction and energy structure adjustment. [0003] The existing photovoltaic charging station charging control method adopts the method of dividing a day according to the photovoltaic conditions and load distribution characteristics, and classifies the vehicles according to the ...

AI Technical Summary

Problems solved by technology

However, when using the existing technology to control the charging of photovoltaic charging stations, it is found that because the distribution network load curve prediction based on the grid load prediction is not considered, the discharge power cannot be adjusted according to the grid situation, resulting in the possibility that the power grid needs to provide excessive power. If there is too much power, the power consumption of the power grid will be too high, which will waste power resources, and the change of weather will affect the energy storage of photovoltaic charging stations, so the current charging strategy will not work well due to energy storage. Execution, thereby affecting the charging effect of the vehicle

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