Building Solar Power Stations in Space

Space solar power station is mainly composed of solar power generation device, energy conversion and launch device, ground receiving system and conversion device. Its main working principle is: the solar power device converts solar energy into electric energy, and then the electric energy is converted into microwave or laser by the energy conversion device, and the transmitting device is used to send beams to the ground, and then the receiving system on the ground receives these beams, and finally It is converted into electrical energy through a conversion device and connected to the grid. The reason for the construction of solar power stations in space is that the utilization rate of solar energy on the ground is not high, and it is easily affected by many factors, such as cloud and rain, seasons, day and night changes, and atmospheric absorption and scattering. And the energy density of solar energy received on the ground varies greatly and is very unstable. But in space, the utilization rate of solar energy will be greatly improved. For example, a 1 square meter photovoltaic cell can only generate 0.1 kilowatts of electricity in foggy areas, and can generate about 0.4 kilowatts of electricity when the sun is direct at noon in northwest my country. However, if it is in a space outside the troposphere, it can Generate 10 to 14 kilowatts of electricity.

Compared with fossil energy that is increasingly depleted, non-renewable and will cause environmental pollution, solar energy is more efficient, durable, and pollution-free; compared with wind and water power, solar energy is relatively less affected by natural factors and covers a wider area. The use of space solar power stations can provide power to remote areas, disaster-stricken areas and other specific areas. It can also flexibly supply power to mobile targets on the ground. At the same time, spacecraft can get rid of huge solar battery wings, greatly improving power level and control accuracy, and even in the future. Space solar power stations can be used for space fuel production and space processing and manufacturing, and promote the development of space industry.