Mismatch loss analysis of solar array output power on stratospheric airship during flight

LIU, Siyu; SUN, Kangwen; LIANG, Haoquan; JI, Xinzhe; ZOU, Tong; SHAN, Chuan

doi:10.1016/j.cja.2023.10.014

Cited by 5 publications

(1 citation statement)

References 48 publications

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“…Song et al [14] considered the output characteristics of solar arrays under non-maximum power point tracking (MPPT) mode, which further improved the accuracy of the array power generation model. Liu et al [15] calculated the non-uniform irradiation and temperature in the solar array of a stratospheric airship and established a simulation model to analyze the mismatch loss of the array under different flight conditions. Shan et al [16] found that changes in the yaw and pitch angles of stratosphere airships are the main cause of solar array mismatch loss.…”

Section: Introductionmentioning

confidence: 99%

Online Learning-Based Surrogate Modeling of Stratospheric Airship Solar Array Output Power

Sun,

Liu,

et al. 2024

Aerospace

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The stratospheric airship is a type of aerostat that uses solar energy as its power source and can fly continuously for months or even years in near space. The rapid and accurate prediction of the output power of its solar array is the key to maintaining energy balance and extending flight time. This paper establishes an online learning model for predicting the output power of the solar array of stratospheric airships. The readings of radiometers arranged on the surface of the airship are used as features for training the model. The parameters of the model can be updated in real-time during the flight process without retraining the entire model. The effect of radiometer placement on the model accuracy was also analyzed. The results show that for the continuous flight of 40 days, the online learning model can achieve an accuracy of 88% after training with 10 days of flight data and the accuracy basically reaches its highest level after 20 days. In addition, placing the radiometers at the four corners of the array can achieve a higher prediction accuracy of 95%. The online model can also accurately identify and reflect the effect of module efficiency attenuation or damage and maintain high accuracy.

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Section: Introductionmentioning

confidence: 99%