Change search
ReferencesLink to record
Permanent link

Direct link
Evaluation of flexibility in hydropower stations
Uppsala University, Disciplinary Domain of Science and Technology, Technology, Department of Engineering Sciences.
2012 (English)Independent thesis Advanced level (professional degree), 20 credits / 30 HE creditsStudent thesis
Abstract [en]

This report seeks to evaluate the flexibility in a number of Fortum’s hydropower stations. The deregulation of the Nordic electricity market has put an emphasis on revenue maximizing rather than cost minimizing and there are good indications that flexible assets will be even more valuable in the future when more wind power has been introduced into the system. Through interviews with people involved in the hydropower planning and operation process a number of factors with the potential of affecting the flexibility or causing deviations between planned and realized operation have been identified and explained. These interviews have also been used to identify main flexibility limitations in studied stations, and what potentially could be done to improve the flexibility. A data analysis has been performed where historical data from planned and realized operation and results from a model developed in Matlab has been studied. The developed linear programming model is used as a reference level of an idealized theoretical potential for flexibility. Volume weighted average prices have been used to measure and compare the flexibility of studied stations. The analysis shows that the studied stations can be divided into two groups with regards to their flexibility compared to the modeled flexibility. This result is somewhat confirmed by the interview findings. Factors related to constraints imposed by water rights seem to have the biggest single impact on the flexibility of hydropower stations. The potential for flexible operation varies with season and the planned and realized operation is closer to the modeled results during the winter. It is a general opinion within the organization that there is a potential for a more flexible utilization of many hydropower stations. Experience, resources, understanding in how to fully utilize the reservoirs, and how multiple stations in a river reach can be coordinated are keys to improving the flexibility. 

Place, publisher, year, edition, pages
2012. , 82 p.
UPTEC ES, ISSN 1650-8300 ; 12001
Keyword [en]
hydropower planning, flexibility, short time regulation
Keyword [sv]
vattenkraftplanering, reglernytta, korttidsreglering
National Category
Engineering and Technology
URN: urn:nbn:se:uu:diva-167674OAI: diva2:495430
Educational program
Master Programme in Energy Systems Engineering
Available from: 2012-02-10 Created: 2012-01-31 Last updated: 2012-02-10Bibliographically approved

Open Access in DiVA

fulltext(1049 kB)968 downloads
File information
File name FULLTEXT02.pdfFile size 1049 kBChecksum SHA-512
Type fulltextMimetype application/pdf

By organisation
Department of Engineering Sciences
Engineering and Technology

Search outside of DiVA

GoogleGoogle Scholar
Total: 968 downloads
The number of downloads is the sum of all downloads of full texts. It may include eg previous versions that are now no longer available

Total: 1657 hits
ReferencesLink to record
Permanent link

Direct link