Method and device for predicting output power attenuation of solar cell array

Abstract

The invention discloses a solar cell array output power attenuation predicating method and device. The method includes: predicating solar cell array output power attenuation through a formula that P=VXI=P0XJXcos(theta)Xeta, wherein V and I represent working voltage and working current of a solar cell array respectively, P represents in-orbit working output power of the solar cell array, P0 represents theoretical maximum output power of the solar cell array, J represents a sunlight intensity coefficient, theta represents a solar incident angle, and eta represents an attenuation factor; calculating to obtain the sunlight intensity coefficient J through orbit analysis, calculating to obtain the solar incident angle theta through satellite orbit information and solar cell array attitude information, acquiring the attenuation factor eta through a method of analyzing in-orbit satellite remote sensing parameter data, regulating status update values of the sunlight intensity coefficient J, the solar incident angle theta and the attenuation factor eta in real time by a particle filter method according to observed values, and importing into the formula to predict the solar cell array output power attenuation. By the method, the attenuation of the solar cell array output power and be estimated accurately so as to provide references for satellite design and orbit management.

Description

technical field

[0001] The invention relates to the field of computer technology, in particular to a method and device for predicting output power attenuation of a solar cell array. Background technique

[0002] The solar cell array is the main energy source of the satellite in orbit, and its output power determines the use value of the satellite to a large extent. During the entire life cycle of the satellite, the power demand of the satellite load changes little, but the output power of the solar cell array continues to decay; in the early and middle stages of the satellite's life, the power demand of the satellite load is less than the output power of the solar cell array, which can maintain the power of the satellite. Power balance; however, when the satellite is at the end of its life, the output power of the solar array will attenuate greatly, which may affect the normal operation of the satellite. However, there is currently no method that can predict the output powe...

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