News

According to the way of power transmission, solar photovoltaic power generation can be divided into independent photovoltaic power generation, grid-connected photovoltaic power generation, and distributed photovoltaic power generation.

1.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 components, controllers, and batteries. To supply power to AC loads, an AC inverter is also required.

2.Grid-connected photovoltaic power generation

The grid-connected photovoltaic power generation system is that the direct current generated by solar modules is converted into alternating current that meets the requirements of the mains power grid through a grid-connected inverter and then directly connected to the public power grid. The grid-connected photovoltaic power generation system has a centralized large-scale grid-connected photovoltaic power station, which is generally a national-level power station. The main feature is that the generated energy is directly transmitted to the grid, and the 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, making it relatively difficult to develop. Distributed small-scale grid-connected photovoltaic systems, especially building-integrated photovoltaic power generation systems, are the mainstream of grid-connected photovoltaic power generation due to their advantages such as small investment, fast construction, small footprint, and strong policy support.

3.Distributed photovoltaic power generation

Distributed photovoltaic power generation system, also known as distributed power generation or distributed energy supply, refers to the configuration of smaller photovoltaic power generation and power supply systems at the user site or near the power consumption site to meet the needs of specific users and support the economy of the existing distribution network. operation, or both.

The basic equipment of the distributed photovoltaic power generation system includes photovoltaic cell components, photovoltaic array brackets, DC combiner boxes, DC power distribution cabinets, grid-connected inverters, AC power distribution cabinets and other equipment, as well as power supply system monitoring devices 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 solar energy into the output power, and sends it to the DC power distribution cabinet through the DC combiner box, and is converted into AC power by the grid-connected inverter. The building’s own load, excess or insufficient electricity is regulated by connecting to the grid.