GEO high power WPT demonstration mission-The proposed second step to develop space solar power

Space solar power (SSP) system, a major type of space-based power-generating equipment, is expected to be an important infrastructure providing massive, continuous, and stable green electricity by utilizing solar energy in space. Many countries and organizations consider SSP to be one of the promising clean energy sources. China Academy of Space Technology (CAST) put forward an updated roadmap based on the MR-SPS concept. In the roadmap, the GEO high-power WPT demonstration mission is proposed to be carried out in 2030. The mission, based on the first proposed demonstration mission, High-power electricity generation and WPT demonstration, will demonstrate high-voltage electric power generation, wireless power transmission (WPT), space super-large structure, assembly and control technologies further in GEO, and will lay the foundation for the next stage—MW-level Space Solar Power. The mission includes a spacecraft in GEO and a receiving system on the ground to evaluate high-power electricity system, very long-distance WPT, and robot assembly technologies in space. The spacecraft includes some modules which need to be launched to LEO first. Then, robots will assemble the spacecraft in LEO. The spacecraft will generate over 400 kW electric power and transmit 240 kW RF. The WPT will be conducted in LEO first. Then, the spacecraft will transfer to GEO and demonstrate WPT in GEO. At the same time, as a huge high-power platform, the spacecraft can install the laser power transmission (LPT) device to become a space charge station to supply power to other satellites near the spacecraft.