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Energy Balance Analysis of Small Satellite in Low Earth Orbit (LEO)

机译：低地轨道小卫星的能量平衡分析（LEO）

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In general, satellite electrical power system plays an important role in its mission performance. To perform the mission successfully, the satellite should be provided with the sufficient power until End-of-Life (EOL). To supply the sufficient power, it is not easy to install of larger power generation and storage source with power control units on satellite. Also, the thermal control is difficult in the space. The various technologies have been developed to reduce the satellite power sizing and to design power efficiently. The peak power tracking (PPT) method has been developed for spacecraft power system to use maximum available power of solar array. In general, to compensate for the solar cell's degradation at EOL in satellite, the solar array will be designed with big enough margin. And, when the spacecraft exits eclipses, the peak output power of a solar array becomes very higher than its peak output power in the normal sunlight operation power. As a result, the spacecraft power system should dissipate high excess power through shunt regulators in the beginning of mission and after eclipse exit. To avoid the high power dissipation in the beginning of life and to utilize maximum available power after eclipse exit, the PPT is used in many recent spacecraft. Particularly, this PPT method is useful for the spacecraft in lower orbit because it goes through a large number of eclipse.
机译：通常，卫星电力系统在其任务性能中起着重要作用。为了成功地执行任务，卫星应提供足够的功率，直到寿命结束（EOL）。为了提供足够的电力，在卫星上使用电源控制单元安装较大的发电和存储源并不容易。而且，空间中的热控制在空间中是困难的。已经开发出各种技术来减少卫星电力尺寸和有效地设计功率。已经为航天器电力系统开发了峰值电源跟踪（PPT）方法，以使用太阳能阵列的最大可用功率。通常，为了弥补太阳能电池在卫星的EOL降级，太阳能阵列将设计有足够大的边距。并且，当航天器退出Eclips时，太阳能阵列的峰值输出功率变得非常高于正常阳光操作功率中的峰值输出功率。结果，航天器电力系统应在使命开始和日食退出后通过分流调节器来消散高过量的功率。为了避免生命开始的高功耗并在Eclipse退出后利用最大可用电量，请在许多最近的航天器中使用PPT。特别是，这种PPT方法对于下轨道中的航天器是有用的，因为它通过大量的日食。

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