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高压(HV)部件是引起整星失效的单点故障源,其可靠性对于卫星在轨安全运行至关重要;充放电导致高压部件的二次放电己成为制约卫星研制和安全使用的瓶颈问题.为此,通过地面模拟高压砷化镓太阳电池阵在轨实际的带电环境,复现了高压砷化镓太阳电池阵在此环境下一次静电放电和二次放电的产生过程,并对采用被动防护方法、不同结构尺寸高压砷化镓太阳电池阵的充放电性能进行了研究.研究结果表明:局部充电不平衡是引起高压砷化镓太阳电池阵样品产生一次静电放电的原因;未涂覆室温硫化型硅橡胶(简称RTV)的三结砷化镓高压太阳电池阵样品在80 V工作电压下触发二次放电事件,导致高压太阳电池阵串电路永久性短路击穿.涂覆RTV可降低高压砷化镓太阳电池阵一次静电放电产生的放电次数和放电能量,进而减少二次放电的产生.“,”The high voltage (HV) component can be a single fault-source accounted for the failure of the whole satellite.A reliable component is of great significance for the operation safety of spacecraft in orbit.The charging and discharging (C&D) process of the HV components will lead to the secondary discharge,therefore it becomes a key factor that constrains the development of the satellites as well as the operation safety.We studied the evaluation methods and the protection techniques for the secondary discharge of high voltage GaAs solar cell arrays(HV GaAs),which is of great value to securing the on-orbit satellite operation safety.In order to study the HV GaAs solar cell array secondary discharge phenomenon of the damage caused by the satellite,gallium arsenide solar cell array through ground simulation of high pressure on-orbit actually charged environment,we resembled the HV GaAs solar cell army in the next electrostatic discharge and the second discharge process,and studied the passive protection methods,different structure size high pressure gallium arsenide solar cell array of charge and discharge performance.Research results show that the local charge imbalance is caused by HV GaAs solar cell array sample and an electrostatic discharge,and three junction GaAs high-pressure solar cell array samples in the absence of the room temperature vulcanized silicone rubber (RTV) under 80 V working voltage triggered secondary discharge events will break down high voltage permanent solar cell array series circuit short circuit.Coated RTV can decrease the high pressure GaAs solar cell array number of an electrostatic discharge generated by discharge and the discharge energy,reducing the generation of secondary discharge.