Design of power supply and distribution system for high power KaSAR satellite

The satellite power supply and distribution system is an important part of generating, storing, transforming, adjusting and distributing power for the satellite. It provides energy for the whole life cycle of the satellite platform and the satellite, and affects the reliability, life and energy dissipation of the satellite. SAR satellite power supply and distribution system has the characteristics of high-power pulse power supply and fast response speed. The peak power of KaSAR satellite is usually up to 30, 000 watts to 80, 000 watts. This paper analyzes and summarizes the power supply topology and SAR load characteristics of SAR satellites at home and abroad, and proposes a composite bus power supply topology suitable for high-power KaSAR satellites. Through the power transformation module between the platform bus and the SAR load bus, the SAR load bus can supply power to the platform load, which simplifies the system composition and improves the reliability.