Pitch angle control in wind turbines above the rated wind speed by multi-layer perceptron and radial basis function neural networks

Authors:
Ahmet Serdar Yilmaz;Zafer Özer
Affiliations:
Kahramanmaraş Sütçü İmam University, Department of Electrical and Electronics Engineering, Avsar Campus, 46050-9 Kahramanmaraş, Turkey;Mersin University, Mersin, Turkey
Venue:
Expert Systems with Applications: An International Journal
Year:
2009

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Abstract

In wind energy conversion systems, one of the operational problems is the changeability and discontinuity of wind. In most cases, wind speed can fluctuate rapidly. Hence, quality of produced energy becomes an important problem in wind energy conversion plants. Several control techniques have been applied to improve the quality of power generated from wind turbines. Pitch control is the most efficient and popular power control method, especially for variable-speed wind turbines. It is a useful method for power regulation above the rated wind speed. This paper proposes an artificial neural network-based pitch angle controller for wind turbines. In the simulations, a variable-speed wind turbine is modeled, and its operation is observed by using two types of artificial neural network controllers. These are multi-layer perceptrons with back propagation learning algorithm and radial basis function network. It is shown that the power output was successfully regulated during high wind speed, and as a result overloading or outage of the wind turbine was prevented.