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Revisiting Solar Array String Failures on the International Space StationThe main truss solar arrays of the International Space Station (ISS) have been providing electrical power to the spacecraft for multiple decades. As the solar arrays age, strings on the solar arrays may completely lose functionality, causing a drop in power generation of around 300W. Performance of the solar array strings is periodically checked to identify failed circuitry. Previous presentations on this topic introduced the techniques used to identify solar array string failures and a survey of the ISS to identify the string failures. Since the latest presentation, some of these techniques have declined in usefulness. The installation of the new ISS Roll-Out Solar Arrays (IROSA) and other events in space have had an impact on the string failures. This presentation will review the techniques to identify solar array string failures on the ISS and provide an updated survey of failed strings to date.
Document ID
20250003637
Acquisition Source
Glenn Research Center
Document Type
Presentation
Authors
Steven Korn
(Glenn Research Center Cleveland, United States)
Date Acquired
April 11, 2025
Subject Category
Spacecraft Propulsion and Power
Energy Production and Conversion
Meeting Information
Meeting: Space Power Workshop (SPW)
Location: Torrance, CA
Country: US
Start Date: April 29, 2025
End Date: May 1, 2025
Sponsors: The Aerospace Corporation
Funding Number(s)
WBS: 581570.02.02.02.01
Distribution Limits
Public
Copyright
Work of the US Gov. Public Use Permitted.
Technical Review
NASA Peer Committee
Keywords
Solar Arrays
Electrical Power System
International Space Station
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