Family distributed photovoltaic energy conversion device

Abstract

The invention discloses a family distributed photovoltaic energy conversion device. The family distributed photovoltaic energy conversion device comprises a photovoltaic battery pack, a photovoltaic combiner box, an inverter unit, a signal acquisition mainboard, a battery charger, an electric vehicle, a ceaseless load, a generalized load, an accumulation system, an intelligent power distribution system, a bidirectional electric power meter and a power grid. An output end of the photovoltaic battery pack is connected with an input end of the photovoltaic combiner box, an output end of the photovoltaic combiner box is connected with an input end of the inverter unit, and an input end of the battery charger is connected with an output end of the inverter unit. The bidirectional electric power meter, the accumulation system and the signal acquisition mainboard are bidirectionally cascaded with the inverter unit. The family distributed photovoltaic energy conversion device solves the problem that a distributed photovoltaic system is not realized because a wiring circuit is difficult to reach, and has the advantages of high reliability, strong expansibility, flexible networking, low operating cost, simple maintenance, high cost performance and the like.

Description

technical field [0001] The invention relates to a household distributed photovoltaic energy conversion device, which belongs to the technical field of distributed photovoltaic power generation. Background technique [0002] Solar photovoltaic power generation systems are divided into off-grid photovoltaic power generation systems and grid-connected photovoltaic power generation systems. The off-grid photovoltaic power generation system is mainly composed of solar cell modules, controllers, and batteries. If it supplies power to AC loads, an off-grid inverter is also required. Grid-connected photovoltaic power generation system, that is, the direct current generated by solar modules is directly connected to the public power grid after being converted into alternating current that meets the requirements of the mains through a grid-connected inverter. There are mainly centralized large-scale grid-connected photovoltaic power plants and distributed small-scale grid-connected pho...

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Problems solved by technology

Grid-connected photovoltaic power generation system, that is, the direct current generated by solar modules is directly connected to the public power grid after being converted into alternating current that meets the requirements of the mains through a grid-connected inverter. There are mainly centralized large-scale grid-connected photovoltaic power plants and distributed small-scale grid-connected photovoltaic power generation There are two forms of the system. The main feature of the former is that the generated energy is directly transmitted to the power grid, and the power grid is uniformly deployed to supply power to users. However, this kind of power station has a large investment, a long construction period, and a large area, and it is relatively difficult to develop; while the latter Due to the advantages of small investment, fast construction, small footprint, and strong policy support, it is the mainstream direction for the development of grid-connected photovoltaic power generation systems in the future.

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