Abstract: Electrical power system is one of the important subsystem of a satellite.The successful fulfillment of a space mission depends on the proper and reliable functioning of the power system. Electrical power system includes power generation, power distribution and control, and harness. This paper first discusses the mission and property of a returnable satellite, then presents the design method of electrical power system. Especially, it gives a detailed description for distribution criterion, distribution program (Centralized regulation approach, decentralized regulation approach and mixed regulation approach) and power distributor design.

Key words: Recoverable satellite, Distribution system, Power divider, Electric cable, Electromagnetic compatibility, Design