Solar photovoltaic power generation is divided into independent photovoltaic power generation, grid-connected photovoltaic power generation, distributed photovoltaic power generation.

Independent photovoltaic power generation

Independent photovoltaic power generation system is also called off-grid photovoltaic power generation system. It is mainly composed of solar cell modules, controllers, and batteries. To power AC loads, AC inverters need to be configured.

Grid-connected photovoltaic power generation

Grid-connected photovoltaic power generation system is the direct current generated by solar modules through grid-connected inverter converted into AC power in line with the requirements of the municipal power grid and then directly connected to the public power grid. The centralized large-scale grid-connected photovoltaic power station is generally a state-level power station. Its main feature is that the generated energy is directly transmitted to the grid, and the grid is uniformly allocated to supply power to users. But this kind of power station investment is large, construction period is long, covers a large area, development is relatively difficult. The distributed small grid-connected photovoltaic system, especially the photovoltaic building integrated power generation system, is the mainstream of grid-connected photovoltaic power generation because of its advantages such as small investment, fast construction, small footprint and large policy support.

Distributed photovoltaic power generation

Distributed photovoltaic power generation system, also known as distributed power generation or distributed energy supply, refers to the configuration of small photovoltaic power supply system at or near the user site to meet the needs of specific users, support the economic operation of the existing distribution network, or meet the requirements of both aspects.

The basic equipment of distributed photovoltaic power generation system includes photovoltaic cell module, photovoltaic array support, DC bushbox, DC distribution cabinet, grid-connected inverter, AC distribution cabinet and other equipment, in addition to the power supply system monitoring device and environmental monitoring device. Its operation mode is that under the condition of solar radiation, the solar cell module array of the photovoltaic power generation system converts the energy output from the solar energy and sends it to the DC distribution cabinet through the DC confluence box. Then the grid-connected inverter converts it into AC power to supply the load of the building itself. The excess or insufficient power is adjusted by connecting to the grid.