太阳翼电池串基于静电放电所需要的安全距离设计研究

Safe Distance Design in Solar Array Required for Electrostatic Discharge

关键词:  太阳翼电池串  静电放电  等离子体电阻  导通电流  安全距离

Key words:  Solar array  Electrostatic discharge  Plasma resistance  Breakdown current  Safe distance

摘要:

太阳翼电池串的静电放电作用会产生电池串之间的导通电流以及表面热流，对太阳翼的可靠性带来较大影响。为研究上述问题，本文提出一种等离子体空间电阻数值模型，以求解电池串导电表面之间的空间电阻。基于验证试验，该数值模型的误差为3.19%~7.82%，可基本满足研究需要。在此基础上，针对各类等离子体环境、不同放电电压以及不同间隙下的电池串之间的导通电流和表面热流密度进行数值计算，获得了导通电流和表面热流密度的变化规律，并总结出电池片之间安全距离的建议设计值。

Abstract:

The electrostatic discharge of the solar array will produce the conduction current and the surface heat flux， which has a great impact on the reliability of the solar array. To study the problems above， a numerical model of plasma spatial resistance was established to solve the spatial plasma resistance between conductive surfaces of the two solar cells. Based on the verification test， the relative error of this numerical model ranged within 3.19%~7.82%， which could basically meet the need of the accuracy in this research. Based on this numerical model， the conduction current and surface heat flux of the solar array under different plasma parameters， different discharge voltages and different gaps were calculated to obtain the change rules of the conduction current and surface heat flux. Then， this paper summarized the reference design value for the safe distance between the solar cells.