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2010-03 Transients in Large Offshore Wind Power Plants. Components Selection, Design, Modelling and Grid Interaction
June 7-9, 2012


   The objective of this course is to give the participants a platform for the exchange of scientific and technical information related to components selection, design and modelling of electromagnetic transients in the collection and export power system of large offshore wind farms.
In this course the following topics will be addressed:

- Switching transients
- Insulation coordination
- High voltage cables
- Power transformers
- Circuit breakers
- Wind turbines
- Protection systems
- Mitigation methods
- Offshore substation
- Electrical transient interaction

Large offshore wind farms are based on extensive MV submarine cable collection networks connecting hundreds of identical WTs, placed in regular patterns with certain interspacing. Each WT is connected to the MV network through a step-up transformer and switchgear. The collection grid is connected to a transformer station which in large wind farms is usually also placed offshore at which the voltage is raised to high voltage for transmission via a submarine export cable to a connection point in the public power grid on land up to more than hundred kilometres from the offshore wind farm.

Such arrangements are unusual as compared to a typical expansion of a power system in several ways such as: the lateral sizes of the systems, the large number of identical sub systems: generators, power converters, transformers, and switchgears in the wind turbines and collection network; and also unusual compared to other power system´s operating conditions and environmental constrains.

Regarding the modelling of MV and HV equipment for electromagnetic transient simulation studies, there is fair amount of information and guidelines available in the literature about circuit breakers, transformers, cables, surge arrestors etc.; this however tend to be mainly theoretical information, and in practice the information about these components is typically not available in sufficient detail for accurate insulation coordination studies . Furthermore, commercial simulation

tools tend either to have limited facilities for this type of studies or require very specialized training and experience. In short, the credibility of this type of studies relies on the quality of the models and information that the user can get hold of, and even then, it depends on the simulation tools and the user’s skills. This creates additional concern and further work is necessary to design the collection grid of wind farm with the high reliability, needed for offshore wind farms



Assist. Prof. Rodrigo Garcia (

Rodrigo Garcia was born in Mexico. He received the electrical engineering degree from the National Polytechnic Institute of Mexico, in 2001, the M.Sc. degree from CINVESTAV, Mexico, in 2003 and obtained his Ph.D. degree from the University of Glasgow, U.K., in 2007. In 2008, he was granted with the Hans Christened Ørsted Award at the Centre for Electric Technology(CET) by the Technical University of Denmark to carry out postdoctoral research activities. Since 2009 he holds the position as Assistant Professor. His research interests are dynamics, stability and control of electric power systems; renewable energy integration; and modelling and simulation of FACTS and custom power controllers. He is an IEEE, IET and CIGRE member.


Prof. Joachim Holbøll (

Joachim Holbøll is an Associate Professor with many years experience within on electric power components, modelling and performance. He has been supervisor for PhD projects for many years.



Joachim Holbøll
CET - DTU Elektro

David Taus Johnsen
DONG Energy

Iván Arana
DONG Energy

Christian Unger
Siemens AG

Unnur Stella Gudmundsdottir

Bjørn Gustavsen

Erik Koldby

Amir Hayati Soloot

Marjan Popov
TU Delft
The Netherlands

Kim Høj Jensen
Siemens Wind Power

Jørgen Nygård Nielsen
Siemens Wind Power

Vladimir V. Terzija
Manchester University
United Kingdom

Wojciech Piasecki

Rosemary King
Cardiff University
United Kingdom

Robert Degeneff
Rensselaer Polytechnic Institute
United States of America

Ulisses R. R. Massaro

Course duration and location

Three Days - Monday 7th, Tuesday 8th and Wednesday 9th of June 2010, Lyngby (Copenhagen) Denmark. A gala dinner will take place Monday 7th, June, 20:00, at a restaurant in Copenhagen.

The venue for the meeting is the Technical University of Denmark in Lyngby. The meeting will take place in the new meeting facilities in the main building of DTU, Building 101A.
You will be able to see the number of the meeting room for the EES-UETP Transients course, Room S08, on a screen when entering. See the attached map.


Courses Contents

Monday, June 7th

09:00-09:15 Registration
09:15-09:30 Opening Session
09:30-10:30 Electrical Main Components in Wind Turbines – Environment, Compatibility and Specifications (Joachim Holbøll)
10:30-11:30 Planning and Electrical Studies for Large Offshore Wind Power Plants (David Taus Johnsen)
11:30-12.30 Lunch
12:30-13:30 Switching Transients in Large Offshore Wind Power Plants (Iván Arana)
13:30-14:00 Coffee Break
14:00-15:30 Insulation Coordination for Large Offshore Wind Power Plants (Christian Unger)
15:30-17:00 Measurements for Validation of High Voltage Underground Cable Modelling (Unnur Stella Gudmundsdottir)
20:00-22:00 Gala Dinner

Tuesday, June 8th

09:00-10:00 Power Transformers. Use, technology and trends (Erik Koldby)
10:00-11:30 Wide band modeling of power transformers (Bjørn Gustavsen)
11:30-12:30 Lunch
12:30-14:00 Analysis of High-Frequency Electrical Transients in Offshore Wind Parks (Tarik Abdulahovic)
14:00-14:30 Coffee Break
14:30-16:00 Analysis of Voltage Distribution in Transformer Windings During Circuit Breaker Prestrike (Marjan Popov)
16:00-16:30 Coffee break
16:30-18:00 Wind Turbine design, new technologies, trends and emt modelling (Jørgen Nygård Nielsen)

Wednesday, June 9th

09:00-10:30 Protection Systems and fault detection methods in underground systems (Vladimir V. Terzija)
10:30-12:00 Selection and modelling of mitigation methods by means of arresters, filters, RC, etc. (to be announced)
12:00-13:00 Lunch
13:00-14:30 Guidelines for the design and construction of AC offshore substations for wind farms (Rosemary King)
14:30-15:00 Coffee Break
15:00-16:30 Switching Transients Induced by Transformer and Breaker interaction (Robert Degeneff)
16:30-18:00 Electrical Transient Interaction between Transformers and Power System – Brazilian Experience (Ulisses R. R. Massaro)

Course fees

The course fees include lectures, documentation, coffee breaks, lunches and gala dinner.

Member of EES-UETP 367,5 EUR
Non-Member of EES-UETP: University 900 EUR
Non-Member of EES-UETP: Industry 1500 EUR

The Course Secretariat will send an invoice to each registered participants after the reception of the filled Registration Form.
Payment is requested before the beginning of the course.

Registration form

Course: Electric Vehicle Integration into Modern Power Networks
Monday 22nd – Wednesday 24th, September 2010.

Fill in this form and email a copy to:

Assistant Professor Rodrigo Garcia
Centre for Electric Technology
Department of Electrical Engineering
DTU - Technical University of Denmark
Elektrovej, Building 325, Room 010
DK-2800 Kgs. Lyngby

Registration Form


Hotels in the vicinity of DTU:

Hotel Postgaarden, Gammel Jernbanevej 18, DK-2800 Kgs. Lyngby
Phone: (+45) 4588 1022 Fax: (+45) 4588 3577, Website:,
(Lyngby centrum, Bus 190 or 300S to DTU)

Raadvad Vandrehjem (Youth hostel), Raadvad 1, DK-2800 Kgs. Lyngby
Phone: (+45) 4580 3074 Fax: (+45) 4580 3032,
(1,5 km from DTU)

Hotel Fortunen, Ved Fortunen 33, DK-2800 Kgs. Lyngby
Tel: (+45) 4587 0073, Fax: (+45) 4587 1222,
(1,5 km from DTU)

Gentofte Hotel, Gentoftegade 29, DK-2820 Gentofte
Phone: (+45) 3968 0911 Fax: (+45) 3968 0611
(0,5 km from Gentofte Station, 4 minutes with train to Lyngby; Bus no. 190 or 300 S to DTU)

Scandic Hotel Eremitage, Lyngby Storcenter 62, DK-2800 Kgs. Lyngby,
Phone: (+45) 4588 7700, Fax: (+45) 4588 1782,
(Lyngby centrum, Bus no. 190 or 300S to DTU)

Hotels in Copenhagen:

Cabinn Hotel City, Mitchellsgade 14, 1568 Copenhagen
Phone: (+45) 3346 1616, Fax: (+45) 3346 1717,,
(Close to the Central railway station)

Cabinn Hotel Scandinavia, Vodroffsvej 55, 1900 Copenhagen F,
Phone: (+45) 3536 1111, Fax: (+45) 3536 1114,,
(Close to the Metro)

DGI-byens Hotel, Tietgensgade 65, 1704 Copenhagen V
Phone: (+45) 3329 8050,
(Close to the Central railway Station)

Danhostel, H. C. Andersens Boulevard 50, 1780 København V
Phone: (+45) 3318 8332,
(Close to the Central railway Station)


Joachim Holbøll
Associate professor
Centre for Electric Technology
Department of Electrical Engineering
DTU - Technical University of Denmark
Elektrovej, Building 329
DK-2800 Kgs. Lyngby (Copenhagen)

Phone:+45 4525 3515
Fax: +45 4588 6111

Rodrigo Garcia-Valle
Assistant professor
Centre for Electric Technology
Department of Electrical Engineering
DTU - Technical University of Denmark
Elektrovej, Building 325, Room 010
DK-2800 Kgs. Lyngby (Copenhagen)

Phone: +45 4525 3534
Fax: +45 4588 6111


How to get to DTU

On the web-site you can find instruction on how to get to DTU.
This includes maps of the campus in Lyngby etc. -> About DTU -> How to get to DTU