The structure of grid connected solar photovoltaic power generation system

The grid connected solar photovoltaic power generation system can convert the direct current output by the solar cell array into alternating current with the same amplitude, frequency, and phase as the grid voltage, achieving connection with the grid and transmitting electricity to the grid.

The flexibility of this power generation system lies in that when the sunlight is strong, the photovoltaic power generation system supplies power to the AC load and sends excess energy to the grid; When the sunlight is insufficient, that is, the solar cell array cannot provide enough electricity to the load, it can also obtain electricity from the grid to supply power to the load.

Structure of grid connected solar photovoltaic power generation system

The solar photovoltaic power generation system connected to the public grid is called a grid connected solar photovoltaic power generation system, and its structure includes solar cell arrays, DC/DC converters, DC/AC inverters, AC loads, transformers, and other components.

The grid connected solar photovoltaic power generation system can convert the direct current output by the solar cell array into alternating current with the same amplitude, frequency, and phase as the grid voltage, achieving connection with the grid and transmitting electricity to the grid. The flexibility of this power generation system lies in that when the sunlight is strong, the photovoltaic power generation system supplies power to the AC load and sends excess energy to the grid; When the sunlight is insufficient, that is, the solar cell array cannot provide enough electricity to the load, it can also obtain electricity from the grid to supply power to the load.

In the past, due to the high cost of solar cells, photovoltaic power generation was mostly used for specialized and independent systems, such as aerospace, cutting-edge islands, or demonstration projects in remote areas. With the emergence of new photovoltaic materials, product prices continue to decrease and conversion efficiency continues to improve. The introduction of advanced power electronic devices and microprocessors, as well as the application of advanced control strategies, has made the research and promotion of photovoltaic grid connection technology increasingly possible. The utilization of photovoltaics is gradually developing towards urban grid connected photovoltaic power stations, integrated residential photovoltaic buildings, and low-power household photovoltaic grid connected systems.