Solar power is divided into thermal power generation and photovoltaic power generation. Regardless of production and sales volume, development speed and development prospects, solar thermal power generation cannot catch up with photovoltaic power generation. Solar power usually refers to the solar photovoltaic power generation, referred to as photoelectric. Solar photovoltaic power generation is divided into independent photovoltaic power generation, grid-connected photovoltaic power generation and 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 racking, solar battery components, controllers and batteries. To supply power for AC loads, AC inverters must also be configured.
Grid-connected photovoltaic power generation
The grid-connected photovoltaic power generation system directly connects the direct current generated by the solar module to the public power grid after the grid-connected inverter is converted into an alternating current that meets the requirements of the mains grid. The grid-connected photovoltaic power generation system has centralized large-scale grid-connected photovoltaic power stations, which are generally state-level power stations. The main feature is that the generated power can be directly transferred to the grid, and the grid can be 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. The decentralized small-scale 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, quick construction, small footprint, and strong policy support.
Distributed photovoltaic power generation
Distributed photovoltaic power generation system, also known as decentralized power generation or distributed power supply, refers to the deployment of smaller photovoltaic power generation systems at the user site or near the site to meet the needs of specific users and to support the economy of existing distribution networks. Run, or meet both requirements at the same time.
The basic equipment of the distributed photovoltaic power generation system includes photovoltaic cell modules, photovoltaic solar racking, DC combiner boxes, DC distribution cabinets, grid-connected inverters, and AC distribution cabinets, as well as power supply system monitoring devices and environmental monitoring. Device. The operating mode is that under the condition of solar radiation, the solar cell module array of the photovoltaic power generation system converts the output energy of the solar energy into the DC distribution cabinet through the DC convergence box and reverses the conversion from the grid-connected inverter to the alternating current supply. The building itself is loaded, excess or insufficient power is regulated by connecting the grid.