Photovoltaic power generation is a technology that directly converts light energy into electrical energy by utilizing the photovoltaic effect of the semiconductor interface. The key element of this technology is the solar cell. After the solar cells are connected in series, they can be packaged and protected to form a large-area solar cell module, and then combined with power controllers and other components to form a photovoltaic power generation device. The advantage of photovoltaic power generation is that it is less restricted by geographical areas, because the sun shines on the earth; the photovoltaic system also has the advantages of safety and reliability, no noise, low pollution, no need to consume fuel and erect transmission lines, and can generate electricity and power locally, and the construction period is short.
Photovoltaic power generation is based on the principle of photovoltaic effect, using solar cells to directly convert sunlight energy into electrical energy. Regardless of whether it is used independently or connected to the grid, the photovoltaic power generation system is mainly composed of three parts: solar panels (components), controllers and inverters. They are mainly composed of electronic components and do not involve mechanical parts. Therefore, photovoltaic power generation equipment Extremely refined, reliable and stable, long life, easy installation and maintenance.
In theory, photovoltaic power generation technology can be used in any occasion that requires power, ranging from spacecraft, down to household power, large to megawatt power stations, small to toys, photovoltaic power is everywhere. The most basic components of solar photovoltaic power generation are solar cells (sheets), including monocrystalline silicon, polycrystalline silicon, amorphous silicon and thin film cells. At present, monocrystalline and polycrystalline batteries are used the most, and amorphous batteries are used for some small systems and auxiliary power supplies for calculators.
The efficiency of domestic crystalline silicon cells is about 18 to 23%. A solar panel consisting of one or more solar cells is called a photovoltaic module.
At present, photovoltaic power generation products are mainly used in three aspects: one is to provide power for powerless occasions, mainly to provide power for the living and production of residents in the vast powerless areas, as well as microwave relay power supply, communication power supply, etc. In addition, it also includes some mobile Power supply and backup power supply; second, solar daily electronic products, such as various solar chargers, solar street lights and solar lawn lights, etc.; third, grid-connected power generation, which has been widely implemented in developed countries. my country's grid-connected power generation has not yet started. However, part of the electricity used for the 2008 Beijing Olympics was provided by solar power and wind power.