摘要
低地球轨道(LEO)航天器高压太阳电池阵存在与等离子体相互作用发生静电放电(ESD)导致其失效的风险,需要确定产生一次放电和二次放电的电压阈值并采取相应的防护措施。文章模拟LEO等离子体环境,采用刚性基板三结砷化镓太阳电池试验件,试验研究了LEO条件下高压太阳电池阵在无防护与涂胶防护状态下发生一次放电和二次放电的电压阈值。在太阳电池组件同样并联间隙情况下,试验结果表明:无防护试验件发生一次放电的电压阈值为110 V,涂胶防护试验件发生一次放电的电压阈值为120 V;太阳电池电路通0.83 A电流,无防护试验件发生二次放电的电压阈值为150 V,涂胶防护试验件发生二次放电的电压阈值为160 V。因此,在设计高压太阳电池阵时,建议合理控制相邻太阳电池串之间的电压差和并联间隙,以及采用在相邻太阳电池串之间涂敷硅橡胶等措施,以有效控制太阳电池阵静电放电的发生。
There is a risk of ESD(electrostatic discharge)caused by the interactions between the high-voltage soalr arrays of spacecraft and plasma in the LEO(low earth orbit),which may lead to the failures of sloar array.Thus,the threshold voltages of the primary discharge and the secondary discharge need to be determined,and some corresponding protective measures should be taken.In this paper,the threshold voltages of the primary discharge and the secondary discharge for high-voltage soalr array under unprotected and glue-coated conditions are studied with simulated LEO plasma environment.The triple junction GaAs solar cell with rigid panel specimens is used in this test.The test results show that the threshold voltages of unprotected and glue-coated protection of the primary discharge are 110V and 120V respectively,in the same parallel gap of the solar cell modules.And,when 0.83 A current passes through the solar cell circuit,the threshold voltages of unprotected and glue-coated protection of the secondary discharge are 150V and 160V respectively,in the same parallel gap of the soalr cell modules.In the design of high-voltage solar array,the ESD can be effectively controlled by reasonably controlling the voltage difference as well as the parallel gap,and coating the silicon rubber between the adjacent solar strings.
作者
仇恒抗
李淼
刘文辉
钟汉田
杨帆
张里晟
陈萌炯
QIU Hengkang;LI Miao;LIU Wenhui;ZHONG Hantian;YANG Fan;ZHANG Lisheng;CHEN Mengjiong(Shanghai Institute of Space Power-sources,Shanghai 200245,China;Aerospace System Engineering Shanghai,Shanghai 200586,China)
出处
《航天器工程》
CSCD
北大核心
2021年第1期124-131,共8页
Spacecraft Engineering
基金
国家自然科学基金(U1937601)。
关键词
低地球轨道航天器
太阳电池阵
高压
静电放电
电压阈值
LEO(low earth orbit)spacecraft
solar array
high voltage
ESD(electrostatic discharge)
threshold voltage
