Satellite solar battery array in-orbit test circuit

Abstract

A satellite solar battery array in-orbit test circuit is used for a satellite solar battery array in-orbit IV curve test, and comprises an on-satellite electronic device, an on-satellite information processing unit and a satellite-ground communication unit. After an IV test circuit is switched on, in-orbit real-time data including voltage, current, temperature and the like of a solar battery array can be acquired through the on-satellite electronic device in real time, then is processed by the on-satellite processing unit and is downloaded by the satellite-ground communication unit. A complete solar battery array IV characteristic curve is drawn. The satellite solar battery array in-orbit test circuit overcomes the defects of an existing method that only the voltage and current of the working point of a satellite bus can be counted and the IV curve cannot be visually and comprehensively reflected, improves the accuracy and comprehensiveness of performance monitoring of the solar battery array, provides complete IV curve information for the performance evaluation of the solar battery array, improves the evaluation efficiency of the satellite life, and provides the in-orbit management of the satellite solar battery array with simpler and more visual data support.

Description

technical field [0001] The invention relates to an on-orbit test circuit of a satellite solar battery array, belonging to the field of satellite solar battery array testing. Background technique [0002] All existing satellites have adopted the combined topology of solar cell arrays combined with storage battery packs. As the power generation equipment of the satellite, the solar cell array provides the conversion of solar energy to electric energy for the satellite when it is in orbit. Due to the influence of attenuation factors such as space ion radiation attenuation factor, ultraviolet radiation attenuation factor, microfluidic collision and cold and heat alternation when operating in space, the on-orbit power of the solar cell array will be attenuated . In addition, the earth's albedo and star occlusion will also affect the on-orbit power of the solar array. [0003] The on-orbit test results of the solar array output power can provide accurate on-orbit measurement ba...

AI Technical Summary

Problems solved by technology

This part of the curve is only a part of the entire IV curve, and cannot display the changes in short-circuit current and open-circuit voltage, let alone the overall drift of the IV curve caused by changes in temperature and on-orbit life of the solar cell array.

For example, when the temperature changes, the constant current section of the IV curve will become shorter, and at the same time, the open circuit voltage point will move to the left. However, since the design of the solar cell array ensures that the operating point can work in the constant current section at different temperatures, then Figure 5 The data represented by M cannot represent the left shift of the IV curve

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