The photovoltaic (PV) power subsystem within the Space Station Electrical Power System produces 75 kW of baseload power to support payloads, housekeeping, and Power System operations. It is comprised of four PV modules, each with two solar array wings for primary power generation and five batteries for energy storage. The subsystem main bus is regulated to a nominal 160 Vdc level, with setpoint flexibility, using a pulse-width-modulated, switching sequential shunt approach. Batteries are managed with individual charge/discharge regulators, permitting controlled load sharing and low-stress charging. These power sources interface with the main dc bus via a dc switching unit, the output of which is provided to main inverters that produce 20 kHz, 440 Vac distributions power. The paper describes the subsystem, major features of the components, and the control and management aspects of the design. Control functions are allocated between hardware and software loops, the latter resident in a dedicated controller in each module. Rationale for design selection as well as hardware development plans are discussed.
Photovoltaic power subsystem design for space station
Fotovoltaische Antriebsuntersysteme fuer eine Raumstation
IECEC, 23rd Intersociety Energy Conversion Engineering Conf., ASME ; 3 , Aug ; 583-588
1988
6 Seiten, 7 Bilder, 5 Quellen
Aufsatz (Konferenz)
Englisch
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