文章基本信息

标题：Stabilising the Light Spectrum of LED Solar Simulators Using LQG Control
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作者：J. Hofbauer ; M. Rudolph ; S. Streif 等
期刊名称：IFAC PapersOnLine
印刷版ISSN：2405-8963
出版年度：2020
卷号：53
期号：2
页码：6583-6590
DOI：10.1016/j.ifacol.2020.12.076
语种：English
出版社：Elsevier
摘要：AbstractFor analysis of photovoltaic cells artificial light sources, so called solar simulators can be used. The light spectrum and light intensity of the considered LED solar simulators is time varying due to current induced heating of the semiconductor. The change influences the measurement accuracy for the characterisation of solar cells. With the current as a control variable, the light intensity can be stabilised. The drift in the light colour can only be compensated with spectrally adjacent LEDs. Based on known physical and phenomenological correlations concerning the behaviour of LEDs, model equations for the solar simulator were developed and simplified. The corresponding parameters were determined by experiments on a solar simulator. A LQG controller was designed for the stabilisation of the time-varying spectrum. The controller is tested in simulations for different light spectra. The improvements over the uncontrolled case are demonstrated.
关键词：Keywordssolar simulatorLQG controlLEDspectrum estimationsolar cells