Development of High Voltage Solar Array for 300V-bus Satellite

本研究的目的是为300V总线型卫星研制一种即使在近地轨道等离子体环境下也能稳定工作的太阳能电池板样机。我们首先开发了实验系统。然后，我们测试了各种太阳能电池板优惠券，这些优惠券已经融入了新的想法。最后，在常规100V母线卫星所用的标准太阳能电池板上涂覆ETFE薄膜，进行了初步的轨道演示实验，显示出了最好的起弧抑制性能。放置薄膜的目的是通过阻挡来自周围等离子体的带电粒子来防止介质材料附近的导体充电。为了抑制在30年的在轨运行中由于重复触发弧度低于1%而导致的性能下降，需要在25小时内抑制低于1个弧度的起弧点。我们在-400V的偏置电压下，将膜片在类LEO等离子体中照射了28小时，没有观察到弧光。我们测试了-800V的偏置电压3小时，但没有观察到任何弧形。基于这些测试结果，我们在设计300V母线的卫星太阳电池阵列时应考虑以下几点：(1)太阳电池阵桨结构应灵活。(2)一张ETFE膜应覆盖一个太阳电池阵板。(3)太阳电池阵电路布局的负端应在太阳电池阵板的中心处。(4)太阳电池的母线和较短的边缘应进行RTV灌浆。

The purpose of this research is to develop a prototype of solar array for a 300-V bus satellite that can operate stably even in Low Earth Orbit plasma environment. We have first developed experimental systems. Then, we have tested various solar array coupon that have been made incorporating new ideas. Finally, we have carried out preliminary experiment for orbit demonstration about film coupon that showed the best performance of arc inception suppression.The film coupon is made by putting ETFE film on top of standard solar array that is used for conventional 100V-bus satellites. The purpose of putting the film is to prevent charging of conductor near dielectric material by blocking the charged particles from the ambient plasma. In order to suppress the performance degradation due to repeated trigger arcs below 1% during 30years operation in orbit, we need to suppress the arc inception below one arc in 25 hours. We have exposed the film coupon to LEO-like plasma for 28hours with-400V bias voltage and observed no arc. We tested -800V bias voltage for 3 hours but we didn't observe any arc.Based on these test results, the following points should be taken into account when we design 300V-bus satellite solar array,(1)Solar array paddle structure should be flexible.(2)One sheet of ETFE film should cover one solar array panel.(3)The solar array circuit layout should have the negative end at the center of solar array panel.(4)RTV grouting should be made at bus-bar and the shorter edge of solar cells.