Short-term forecasting of wind power generation using extreme learning machine and its variants

Abstract

This paper proposes three efficient and accurate wind power prediction algorithms, i.e., online sequential extreme learning machine (OS-ELM), ridge ELM (R-ELM) and hybrid linear and nonlinear neural network (HNN) trained by Levenberg-Marquardt algorithm. Learning speed rate and computational scalability are essential attributes upon which the accuracy of the prediction algorithm is decided. In this regard, the accuracy of some of the conventional algorithms, such as support vector regression or neural network-based algorithms is very frail. This is due to the fact these algorithms are computed in an iterative manner in which the hidden layers are being updated in each iteration. On the contrary, the proposed ELM-based prediction algorithm computes the output weight vector in a chunk, where the hidden layer is not being updated. Hence, the essential features such as the learning speed rate and computational scalability have been significantly improved that allows a faster response for the proposed algorithm, which is distinguished from the response of the conventional algorithms in the MATLAB/Editor environment, as has been illustrated in the simulation and result section.