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把高压太阳电池阵放入低地球轨道中就会发生电弧放电,造成航天器表面退化、电磁干扰、PN结破坏和其它负作用。文章在阐述电弧放电机理的基础上,介绍了在试验室模拟等离子体环境中进行的两次放电试验。其中一个试验使用的是太阳电池阵物理等效模拟试件,另一个则是真实的太阳电池阵样品。试验得出了两种样品在等离子体环境中的放电位置、放电阈值电压,并发现环境与太阳电池电压及放电率等相关参数的关系。比较两个试验可以看出,在相似的环境下,模拟试件的放电阈值比较大。文章最后对试验现象的发生原因进行了初步的分析。研究LEO等离子体环境与HVSA之间的相互作用,并采取相应的防护措施,是大型空间活动必须解决的关键技术之一。
Putting a high-voltage solar array into low earth orbit places an arc that can cause surface degradation, electromagnetic interference, PN junction damage and other negative effects. Based on the explanation of the mechanism of arc discharge, the article introduces two discharge tests conducted in laboratory simulated plasma environment. One of the tests uses a solar array physics equivalent simulation specimen and the other a real solar array sample. The discharge location and discharge threshold voltage of two samples in plasma environment were obtained. The relationship between environment and solar cell voltage and discharge rate was also found out. Comparing the two tests, it can be seen that under similar conditions, the discharge threshold of the simulated specimen is relatively large. At last, the article makes a preliminary analysis of the causes of the test phenomenon. Studying the interaction between the LEO plasma environment and the HVSA and taking appropriate protective measures are one of the key technologies that must be solved in large-scale space activities.