Modular & COTS based power system for small LEO satellite

Satellite Power subsystem is one of the critical subsystems of satellite. The purpose of power subsystem is to generate, store and distribute the conditioned power to all subsystems. This paper focuses on modular design methodology of COTS based small Satellite Power System (SPS). SPS has five main parts Power generation Unit (PGU), Battery Unit (BTU), Power Control Unit (PCU), Power conditioning Unit (PCNU) and Power Distribution Unit (PDU). According to the mission requirements centralized, fully regulated bus architecture is developed using modular approach. The SPS is scalable starting from 200 watt to 1000 watt. It is aimed for experimental LEO mission. The duration of the mission is one year.