Mass and Aerodynamic Imbalance Estimates of Wind Turbines

Jenny Niebsch, Ronny Ramlau and Thien T. Nguyen
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Jenny Niebsch: Johann Radon Institute, Austrian Academy of Science, Altenbergerstr. 69, 4040 Linz, Austria
Ronny Ramlau: Institute for Industrial Mathematics, Johannes Kepler University, Altenbergerstr. 69, 4040 Linz, Austria
Thien T. Nguyen: Institute for Applied Geometry, Johannes Kepler University, Altenbergerstr. 69, 4040 Linz, Austria

Energies, 2010, vol. 3, issue 4, 1-15

Abstract: Due to its effect on the operation time of wind turbines, rotor imbalances of a wind turbine have to be detected early enough. We present a method that determines inhomogeneous mass distributions of the rotor as well as deviations in the pitch angles of the rotor blades from vibrational data only. To this end, a mathematical model connecting the load caused by the imbalances to the resulting vibrations was developed. After discretization, the resulting vibration equation was solved analytically. The inverse problem, i.e. , the calculation of the mass and aerodynamic imbalance from vibrational data, was solved by using nonlinear regularization theory. Numerical simulations were performed using artificial vibration data.

Keywords: wind turbine; mass imbalance; aerodynamic imbalance; inverse problem (search for similar items in EconPapers)
JEL-codes: Q Q0 Q4 Q40 Q41 Q42 Q43 Q47 Q48 Q49 (search for similar items in EconPapers)
Date: 2010
References: View complete reference list from CitEc
Citations: View citations in EconPapers (10)

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