A master thesis from Aalborg University
Investigation of wind turbine generator cables and their impact on waveform deterioration by means of experiment and circuit simulation
Author(s)
Term
4. term
Education
Publication year
2019
Submitted on
2019-05-31
Pages
123 pages
Abstract
The evolvement of wind turbine power levels lead to an interest in investigat- ing new physical conversion stage ar- rangements. One appealing distribu- tion is moving the network decoupling back-to-back converter from nacelle to the tower base. This results in 100-200 m long cables between the generator in the nacelle and converter at ground level. The motivation is to investigate resul- tant reflection effects due to long ca- bles at the cable junctions in nacelle and tower base. To investigate the cables impact, a low voltage setup emulates the above WTG topology and serves as a down- scaled validation study. A circuit sim- ulation of generator, cables and ac- tive rectifier is modeled in reflecting the experimental setup. Generator and cable components are parameter- ized by impedance fitting to the imple- mented model. Based on the valida- tion, medium voltage simulation gives further insight for an expected appli- cation. This gives the ability to assess the fea- sibility of a dV/dt filter. With the overvoltages suppressed, the genera- tor is protected from harmful winding stresses.
Keywords
Documents
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