Pico-satellite solar cell simulator and simulation method

Abstract

The invention provides a Pico-satellite solar cell simulator and a simulation method. The solar cell simulator comprises a computer, a plurality of daughter boards, a mother board and a computer data interface. The invention also provides a simulation method of a Pico-satellite solar cell, which comprises the following steps: firstly, acquiring a plurality of solar cell array characteristic curve parameters and an effective irradiation coefficient; secondly, multiplying the solar cell array characteristic curve by the effective irradiation coefficient to obtain a curve which is actually output by the solar cell; thirdly, calculating the current load impedance by utilizing an output current and an output voltage which are sampled at both sides of a load to obtain a voltage / current relational graph of both ends of the load, and intersecting the voltage / current relational graph with the curve which is actually output by the solar cell, wherein the current value corresponding to the intersection point is the current value which is output actually; and finally, outputting the current value which is output actually to the load to realize the real-time simulation of the current value. The invention has the advantages of simple hardware structure, can conveniently simulate current outputs in multiple surfaces at the same time, and can simulate the outputs of the solar cell under different irradiation conditions according to the actual rating curve.

Description

technical field [0001] The invention relates to the simulation technology of aerospace devices, in particular to a pico-satellite solar cell simulation technology and device. Background technique [0002] Picosatellites (tiny satellites with a weight of 1-10kg) are small in size, usually in the shape of a cube, with high-efficiency solar cells pasted on the outside of the six sides, and a solar cell array is formed by connecting in series and in parallel. Picosatellite solar array power supply has the following characteristics: [0003] 1. When the load is small, the solar cell array is approximately a constant current source output. As the load increases, the output voltage increases and the output current decreases until it is cut off. Compared with other types of satellites, the output current and voltage of the solar cell array of pico-satellites are very small. [0004] 2. Due to the difference in layout, the area of ​​solar cells on each side will not be completely ...

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Problems solved by technology

[0004] 2. Due to the difference in layout, the area of ​​solar cells on each side will not be exactly equal; and the output performance of each solar cell will not be exactly the same

[0005] 3. When the satellite is in orbit, the entire solar cell array cannot be illuminated at the same time, and the effective illumination area is only the projected area of ​​the sun's illumination direction, so the output power is small

[0010] 1. Some instruments sold on the market are expensive, have complex functions but are not highly targeted, and the number of output interfaces is limited, so it is often impossible for one instrument to simulate the output of any number of surfaces at the same time;

[0011] 2. It can output higher power, but it is not necessary for pico-satellites with low power consumption, but it will reduce the output accuracy;

[0012] 3. Most of the output curves come from the modeling of solar cells, which are different from the test calibration curves of solar cell arrays

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