GaInP_(2)LEO空间太阳电池功率衰减估计  

Estimation of GaInP_(2) Solar Cell Power Degradation in LEO Space

作　　者：李强 赵岩 曹继宏 李会锋 王超 LI Qiang;ZHAO Yan;CAO Jihong;LI Huifeng;WANG Chao(Key Laboratory of Spacecraft In-Orbit Fault Diagnosis and Maintenance,Xi’an 710043,China;State Key Laboratory of Astronautic Dynamics,Xi’an 710043,China)

机构地区：[1]航天器在轨故障诊断与维修重点实验室,西安710043 [2]宇航动力学国家重点实验室,西安710043

出　　处：《电源学报》2021年第5期191-199,共9页Journal of Power Supply

基　　金：国家自然科学基金资助项目(61801518)。

摘　　要：针对空间环境对GaInP_(2)太阳电池输出功率衰减的影响,以某晨昏轨道卫星搭载器件数据为对象,在分析轨道倾角摄动、光照角变化、降交点地方时漂移和日地距离波动等因素的基础上,讨论电池工作温度和输出电流变化,建立太阳电池输出电流拟合模型。同时,以拟合电流归一化处理为重点,在传统的光照角、日地距离和温度归一化方法的基础上,针对输入光照功率波动,提出利用温度进行归一化处理,无需传统的日地距离归一化。最后,利用实际在轨数据,对两种方法进行检验。结果表明,在晨昏轨道光照率较高、输入光照功率波动较大的情形下,相对于传统方法,新方法下得到的电流数据一致性更好;GaInP_(2)太阳电池输出功率的年衰减因子约为-0.00444/a,相应的年衰减率约为0.443%;预测在轨15年后,输出功率衰减小于6.5%;GaInP_(2)太阳电池抗辐照性较强,适宜于近地空间长寿命应用场合。该方法可应用于在轨卫星长期测控与管理中的遥测诊断、能源估计与预测以及器件健康状态评估等方面。With respect to the output power degradation of GaInP_(2)solar cell influenced by the space environment,the data of a device loaded by a satellite running on a dawn-dusk orbit is selected as the object.On the basis of analyzing factors such as orbit inclination perturbance,solar incidence change,local time of descending node(LTDN)shift,and the fluctuations of the Sun-Earth distance,the working temperature of the solar cell and its output current are discussed,and a fitting model for the solar cell output current is established.Meanwhile,the main emphasis is put on the normalization of fitted current,and on the basis of the traditional normalization method for solar incidence angle,Sun-Earth distance,and temperature,it is proposed that temperature is normalized by taking into account the solar power fluctuations,which does not require the traditional normalization of the Sun-Earth distance.Finally,the actual in-orbit data is used to examine the two models.Results indicate that the current data obtained using the novel method is more consistent than that obtained using the traditional method when the dawn-dusk orbit has a higher sunshine and large fluctuations of solar power.The degradation factor of GaInP_(2)solar cell output power is estimated to be about-0.00444 per year,which is equal to 0.443%of annual power degradation.It is predicted that the output power degradation will be less than 6.5%in 15 years in orbit.The GaInP_(2)solar cell has a better antiradiation performance and is more feasible to low-earth orbit(LEO)space application scenarios with a long service life.This novel method is applicable to the long-term measurement,control and management of in-orbit satellites,including telemetry diagnosis,energy estimation and pre-diction,and the evaluation on the state of health(SOH)of devices.

关 键 词：太阳电池 功率 衰减 估计 预测 遥测 

分 类 号：V556.1[航空宇航科学与技术—人机与环境工程]