This article describes the phenomenon of the abnormal output current drop of a solar array (SA) of a low Earth orbit satellite. All possible failure causes were analyzed in detail and the most likely reason was determined to be an open-circuit in solar cell interconnectors. The failure mechanisms were comprehensively analyzed from three aspects: solar cell replacement process, erosion of atomic oxygen, and thermal fatigue. The analysis results were verified by corresponding ground tests. For the on-orbit failure, a solution to slow down the output current drop of SA was given and verified to be effective by ground remote control operations on the satellite on orbit. The improvement measures for the development of SAs to avoid the output current drop are also proposed.

中文翻译：

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低地球轨道卫星太阳电池阵列异常输出电流降的研究

本文介绍了低地球轨道卫星的太阳能电池阵列（SA）的异常输出电流下降现象。详细分析了所有可能的故障原因，并确定了最可能的原因是太阳能电池互连器中的开路。从三个方面全面分析了失效机理：太阳能电池更换过程，原子氧侵蚀和热疲劳。通过相应的地面测试验证了分析结果。对于在轨故障，给出了一种减慢SA输出电流降的解决方案，并已通过在轨卫星上的地面远程控制操作验证了该解决方案是有效的。还提出了开发SA以避免输出电流下降的改进措施。