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Lei Yang
School of Automation & Electrical Engineering, Lanzhou Jiao Tong University

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An Improved Prediction Approach on Solar Irradiance of Photovoltaic Power Station Haiying Dong; Lei Yang; Shengrui Zhang; Yuan Li
Indonesian Journal of Electrical Engineering and Computer Science Vol 12, No 3: March 2014
Publisher : Institute of Advanced Engineering and Science

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Abstract

Solar irradiance is the main factor which influences the photovoltaic output power. In order to predict the photovoltaic output power accurately, the prediction accuracy of irradiance should be improved. In terms of unsatisfactory prediction accuracy of irradiance of traditional photovoltaic power station, this paper presents an approach to predict solar irradiance of photovoltaic power station based on wavelet decomposition and extreme learning machine. In this method, the historical solar irradiance data is divided through the wavelet decomposition of three layers. Then the prediction models of irradiance are built based on the extreme learning machine. Finally, the solar irradiance is predicted with 15 minutes’ resolution one day ahead. With the decomposed components and the relative meteorological data as the input and the irradiance forecast data after wavelet reconstruction as the output. The simulation result coming from the actual measured data of a photovoltaic power station in Gansu province indicates that the proposed model is of higher accuracy in comparison with the traditional ones. DOI : http://dx.doi.org/10.11591/telkomnika.v12i3.4017
Co-Authors Haiying Dong Shengrui Zhang Yuan Li