PhD programme
by
Kenneth Pedersen
Defence
Date & Time: Wednesday June 27, 2007, 1pm
Location: Building 308, aud. 11, DTU
Examiners:
Professor Sture Lindahl
Lund University
PhD. MSc. Søren Støvring-Hallsson
Butler Networks
Professor Jacob Østergaard
Ørsted•DTU (Committee Chairman)
Chairman:
Associate Professor Knud Ole Helgesen Pedersen
Ørsted•DTU
Download thesis
Project period
1st of February 2004 to 1st of May 2007
Supervisors
Joachim Holbøll
Mogens Henriksen
Carsten Rasmussen, Energinet.dk
Asger Jensen, DONG energy
Erik Kolby, ABB
Background
Recent problems with transformers in large wind Turbines have shown a need for a better understanding of the effect of varying electrical conditions on transformer performance. Such an understanding is very valuable to companies involved with designing the electrical systems for offshore wind turbine plants, ranging from the owner and operators of the wind turbines to the manufacturers of the individual electrical components.
Reason: Replacement of the electrical components, including loss of production in offshore wind turbines, is very costly, not least when these wind turbines become much larger.
Aim of project
The aim of this project is to determine critical voltages in transformers and electrical system in large wind turbines including their consequences.
Therefore, it is hoped that this PhD project can provide the necessary new knowledge and tools for transformer modeling, including test requirements to improve the long term reliability of this component, thereby improving the design of the rather complex electrical system in today's large wind turbines.
Sponsors
The work is funded by Energinet.dk, Dong Energy
and ABB Denmark A/S.
M.Sc. programme project
Read the Project Description
April 2004
Kenneth Petersen receives the EFPE 2004 Award