Distributed intelligent energy storage system for realizing photovoltaic power generation at roof

Abstract

The invention relates to a distributed intelligent energy storage system for realizing photovoltaic power generation at a roof. The distributed intelligent energy storage system comprises an energy storage accumulator battery, a photovoltaic battery direct current conversion module, an energy storage battery direct current conversion module, rectification modules, a grid-connected inverter, an off-grid inverter and an intelligent management system, wherein the energy storage accumulator battery is in electric connection with the photovoltaic battery direct current conversion module and the energy storage battery direct current conversion module; the energy storage battery direct current conversion module is in electric connection with the grid-connected inverter and the off-grid inverter through the rectification modules; the intelligent management system is in electric connection with the energy storage accumulator, the photovoltaic battery direct current conversion module, the energy storage battery direct current conversion module, the rectification modules, the grid-connected inverter and the off-grid inverter. According to the invention, on one hand, electric energy obtained by a photovoltaic power generation system can be effectively, efficiently and reasonably stored, and on the other hand, the obtained electric energy and stored electric energy of the photovoltaic power generation system can be flexibly subjected to grid-connected and off-grid operation with a commercial power supply network according to use requirements.

Description

technical field [0001] The invention relates to a photovoltaic power generation device, in particular to a distributed rooftop photovoltaic power generation intelligent energy storage system. Background technique [0002] At present, the method of installing solar panels on the roof for photovoltaic power generation has gradually been promoted and popularized, but in actual use, it is also found that due to photovoltaic power generation, it is greatly affected by time factors and environmental factors, that is, when the sun is good When the solar conditions are bad, the power generation is large, and the power generation is small or even no power generation when the sunshine condition is bad, so the fluctuation of photovoltaic power generation is extremely large, and it cannot directly function for electrical appliances or the power grid. In order to overcome this problem, currently in the photovoltaic power generation system There is a special energy storage mechanism in ea...

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Problems solved by technology

[0002] At present, the method of installing solar panels on the roof for photovoltaic power generation has gradually been promoted and popularized, but in actual use, it is also found that due to photovoltaic power generation, it is greatly affected by time factors and environmental factors, that is, when the sun is good When the solar conditions are bad, the power generation is large, and the power generation is small or even no power generation when the sunshine condition is not good, so the fluctuation of photovoltaic power generation is extremely large, and it cannot directly function for electrical appliances or the power grid. In order to overcome this problem, the current photovoltaic power generation system There is a special energy storage mechanism in each of them, through which the surplus electric energy of photovoltaic power generation can be stored and output stably. It can meet the needs of balancing photovoltaic power fluctuations, but it cannot directly connect the photovoltaic power to the grid, which greatly limits the performance of the photovoltaic power generation system. Although there are currently some photovoltaic systems that have added grid-connected operation equipment, but this method leads to complex mechanism of photovoltaic power generation system, high cost, and cannot effectively meet the needs of actual use. Therefore, in order to solve this problem, it is urgent to develop an inventive solar photovoltaic power generation energy storage system to meet practical needs

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