Title :
Short-term solar radiation prediction based on SVM with similar data
Author :
Xiyun Yang ; Feifei Jiang ; Huan Liu
Author_Institution :
Sch. of Control & Comput. Eng., North China Electr. Power Univ., Beijing, China
Abstract :
Solar energy as a clean and renewable energy gets more and more attention by the international community. Photovoltaic (PV) power generation connected grid is the main development tendency for utilizing solar energy in recent years. Due to discontinuity of PV conversion technology, stability of grid -connected PV power generation is challenged and PV power prediction becomes an effective way to solve these problems. Because the prediction accuracy for solar radiation is the first key problem for the PV power prediction, a solar radiation prediction method based on support vector machine (SVM) with similar data was proposed in the paper. Similar data was extracted from historical data by using pattern recognition with Euclidean distance to create the training samples. Employing to wavelet decomposition, the original solar radiation signal was decomposed into trend signal of low frequency band and random signal of high frequency band. Different SVM radiation prediction models were trained respectively and combined to obtain the final forecasting results. The simulation results show that similar data enhance the relevance of the data and improve the model prediction accuracy Wavelet decomposition reduces the non-stationary parts of solar radiation signals. Different SVM models better approximate the solar radiation characteristics of low and high frequency band and good prediction accuracy is obtained.
Keywords :
feature extraction; photovoltaic power systems; power engineering computing; signal processing; sunlight; support vector machines; Euclidean distance; PV power generation; PV power prediction; SVM radiation prediction models; historical data extraction; pattern recognition; photovoltaic power generation; short-term solar radiation prediction; similar data; solar radiation signal decomposition; support vector machine; wavelet decomposition; SVM; Short-term Prediction; Similar Data; Solar Radiation; Wavelet Analysis;
Conference_Titel :
Renewable Power Generation Conference (RPG 2013), 2nd IET
Conference_Location :
Beijing
Electronic_ISBN :
978-1-84919-758-8
DOI :
10.1049/cp.2013.1735