Acquiring method and device for electricity purchasing quantity of photovoltaic electrical changing station

Abstract

The invention discloses an acquiring method and device for the electricity purchasing quantity of a photovoltaic electrical changing station. The acquiring method comprises the steps that the power grid electrovalence at a first time period is obtained; a first electricity quantity, obtained through photovoltaic electrical changing equipment, of the photovoltaic electrical changing station at the first time period and a second electricity quantity needed by an electric car are obtained; whether the power grid electrovalence at the first time period is greater than a preset threshold value or not is judged; if the power grid electrovalence at the first time period is greater than the preset threshold value, the electricity purchasing quantity of a power grid at the first time is determined according to the first electricity quantity, the second electricity quantity and a third electricity quantity, wherein the third electricity quantity is the quantity of electricity already stored in the photovoltaic electrical changing station; if the power grid electrovalence at the first time period is not greater than the preset threshold value, the electricity purchasing quantity of the power grid at the first time period is determined according to the first electricity quantity and the second electricity quantity. According to the acquiring method and device for the electricity purchasing quantity of the photovoltaic electrical changing station, the problem that in the prior art, as the electricity purchasing quantity of the photovoltaic electrical changing station can not be determined, the cost for electricity purchasing is high is solved, and the effects of determining the electricity purchasing quantity of the power grid and lowering the electricity purchasing cost are achieved.

Description

technical field [0001] The present invention relates to the field of power supply systems, in particular to a method and device for obtaining electricity purchased by a photovoltaic power station. Background technique [0002] The existing domestic electric vehicle charging facilities mainly include AC charging piles, charging stations, battery swapping stations, etc. Among them, the battery swap station refers to a place that provides electric energy supply for electric vehicles by replacing batteries. Photovoltaic power stations can effectively use the grid load low-valley period to charge the standard battery box in a centralized and orderly manner, and play a good role in shifting the peak load of the grid load; on the other hand, the electricity price is lower during the grid load low-valley period, which can also reduce charging costs. , improve the economy of electric vehicle operation, and on the other hand, photovoltaic power generation can make good use of solar e...

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Problems solved by technology

[0006] Aiming at the problem in the related art that the electricity purchased by photovoltaic power stations cannot be determined, resulting in high electricity purchase costs, no effective solution has been proposed so far. Therefore, the main purpose of the present invention is to provide a method and method for obtaining purchased electricity by photovoltaic power stations. device to solve the above problems

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