Distributed photovoltaic power generation electric quantity distribution system and method

Abstract

The invention provides a distributed photovoltaic power generation electric quantity distribution system and method. The distributed photovoltaic power generation electric quantity distribution system comprises a photovoltaic system, a grid connection device (3) and a charging device (2). The photovoltaic system comprises a photovoltaic power generation device (7) and an electricity storage device (6). The distributed photovoltaic power generation electric quantity distribution system is characterized in that the system is further provided with a controller (1), the grid connection device (3) is provided with an inversion output device (4) and a rectification input device (5), the controller receives information about electricity consumption peaks and valleys from the charging device (2) and receives information about a stored electric quantity from the electricity storage device (6), and the controller (1) controls the on-off states of the inversion output device (4) and the rectification input device (5) according to the above information. The method comprises the steps of: a, judging whether a current period is an electricity consumption peak or an electricity consumption valley; b, judging the stored electric quantity of the electricity storage device; and c, determining whether to output the power generated by the photovoltaic system externally or to charge the electricity storage device by a power grid. By adopting the system and the method, the power generation capability and the electricity storage capability of the household photovoltaic power generation system are fully utilized, peak clipping and valley filling are realized, the electricity shortage of a power grid peak is remedied, and the fluctuation of the power grid is relieved.

Description

technical field [0001] The invention belongs to the field of photovoltaic power supply, and in particular relates to a distributed photovoltaic power distribution system and method. Background technique [0002] The use of new energy has become a major focus at present. In the use of new energy, it is a potential power generation method to connect residents' own photovoltaic power generation systems to the grid as distributed photovoltaic power generation points. Home photovoltaic power generation systems generally include There are two parts: photovoltaic cells and power storage equipment. Photovoltaic cells generate electricity during the day, part of which is used by households, and it will be more beneficial to store the excess part on the grid. Especially in the hot summer, the continuous strong sunshine has huge potential for power generation. The power storage equipment of the household power generation system may not be able to store the power at all, resulting in a ...

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Problems solved by technology

However, if the residents fully supplement the electricity to the grid, it will have an impact on the electricity consumption of the residents. In addition, the electricity of the grid itself will also be lost during the low period of electricity consumption. How to avoid this loss is also a problem

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