Abstract
The Space Station electrical power system is designed with the flexibility to accommodate emerging technologies and expert systems over an operational lifetime of 30 years and is being designed with the necessary software hooks and hardware scars to accommodate growth. The electrical power system is planned to grow from the initial 75 kW to 300 kW. The phase-I station will utilize photovoltaic arrays to produce the electrical power; however, for growth to 300 kW, solar dynamic power modules will be utilized. Pairs of 25 kW solar dynamic power modules will be added to the station to reach the higher power levels. The addition of solar dynamic power in the growth phase places constraints on the initial Space Station systems such as guidance navigation and control, external thermal factors, truss structural stiffness, computational capabilities and storage which must be taken into account in order to facilitate the addition of the solar dynamic modules. >
Highlights
First among these are the experiments users who are divided into several utilization scenarios: astrophysics and terrestrial observations, biological observations, and materials processing experiments
Astrophysics and terrestrial observation scenarios require an increase in the Space Station Freedom (SSF) truss work with provisions for attaching additional external payloads
This selection is based on the significant efficiency gains and life cycle cost (LCC) savings projected for Solar dynamic (SD) versus growth with a PV power generation system
Summary
It contains one habitation module and three laboratory modules (United States, European, Japanese), has a crew of six to eight astronauts, delivers 75 kW of electric power to users, and has two to four active attached payload accommodations on the truss. There is a diverse spectrum of groups that would like to use SSF First among these are the experiments users who are divided into several utilization scenarios: astrophysics and terrestrial observations, biological observations, and materials processing experiments. Growth of the Electric Power System (EPS) is inevitable and the EPS design and architecture must include an evolving capability so as to not preclude any future utilization and capability of SSF: group would like to use SSF to repair and refurbish satellites and payloads recovered with the vehicles from the GROWTH POWER DEMANDS transportation node users.
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