Research Output
1 - 3 of 3
Publication
Experience and Challenges With Short-Term Balancing in European Systems With Large Share of Wind Power
2012-10, Söder, Lennart, Abildgaard, Hans, Estanqueiro, Ana, et al.
The amount of wind power in the world is quickly increasing. The background for this development is improved technology, decreased costs for the units, and increased concern regarding environmental problems of competing technologies such as fossil fuels. Some areas are starting to experience very high penetration levels of wind and there have been many instances when wind power has exceeded 50% of the electrical energy production in some balancing areas. The aims of this paper are to show the increased need for balancing, caused by wind power in the minutes to hourly time scale, and to show how this balancing has been performed in some systems when the wind share was higher than 50%. Experience has shown that this is possible, but that there are some challenges that have to be solved as the amount of wind power increases.
Publication
Variability of load and net load in case of large scale distributed wind power
2010-10, Holttinen, Hannele, Kiviluoma, Juha, Estanqueiro, Ana, Aigner, Tobias, Wan, Yih-Huei, Milligan, Michael R.
Large scale wind power production and its variability is one of the major inputs to wind integration studies. This paper analyses measured data from large scale wind power production. Comparisons of variability are made across several variables: time scale (10-60 minute ramp rates), number of wind farms, and simulated vs. modeled data. Ramp rates for Wind power production, Load (total system load) and Net load (load minus wind power production) demonstrate how wind power increases the net load variability. Wind power will also change the timing of daily ramps.
Publication
Impacts of large amounts of wind power on design and operation of power systems, results of IEA collaboration
2008-05, Holttinen, Hannele, Meibom, Peter, Orths, Antje, O'Malley, Mark, Ummels, Barth, Tande, John Olav, Estanqueiro, Ana, Gomez, Emilio, Smith, J. Charles, Ela, Erik
There are a multitude of studies made and ongoing
related to cost of wind integration. However, the results are not easy
to compare. An international forum for exchange of knowledge of
power system impacts of wind power has been formed under the
IEA Implementing Agreement on Wind Energy. IEA WIND R&D
Task 25 on “Design and Operation of Power Systems with Large
Amounts of Wind Power” has produced a state of the art
report in
October 2007, where the most relevant wind power grid integration
studies are analysed especially regarding methodologies and input
data. This paper summarises the results from 18 case studies with
discussion on the differences in the methodology as well as issues
that have been identified to impact the cost of wind integration.