Site analysis for complementary wind turbines in Iceland
Examensarbete för masterexamen
Sustainable energy systems (MPSES), MSc
Gísladóttir, Harpa Sif
As a result of increased focus on climate change, the installed global capacity of wind power has increased rapidly in recent years. The problems connected to the intermittency of wind power production have become clearer and the demand for regulating power increased. An interesting solution is to use hydro power to even out the production fluctuations. In Iceland, electricity is mainly produced by hydro and geothermal power plants. Therefore, it is of great interest to implement wind power to this hydro dominated power system. In 2013 two wind turbines were erected close to the hydro power plant Búrfellsvirkjun for research purposes. The turbines have proven to have a very high capacity factor and there is a plan to build a wind power park with up to 70 turbines in the area. In this thesis the focus is on finding a feasible location for wind power production to complement the planned production at Búrfell. The meteorological data required to conduct this analysis is collected from the Meteorological Agency of Iceland. Time series containing the hourly average wind speed at each considered location are gathered. Correlation of wind speeds at considered locations to the wind speed at Búrfell is calculated. Negative correlation of wind speeds between two areas indicates that by placing wind turbines in those two areas it is possible to even out the fluctuations in the wind power production. Many time steps are considered as the wind speeds and behavior of the wind differs between those time steps. The annual power production at the considered locations is estimated using the Weibull probability distribution of wind speeds. Additionally, the wind speed time series are used to calculate the historical power production at each considered location and find the correlation to calculated production at Búrfell. The locations resulting in negative correlation of wind speed and/or production are further analyzed and compared to the calculated production at Búrfell. Höfn í Hornafirði is the most favorable location with regard to the negative correlation of wind speed and power production for many time steps. Additionally, this location is estimated to have high enough capacity factor to have the possibility to complement the planned production at Búrfell. However, the vulnerability of the results to the estimated roughness length is of great concern. The results of this thesis show that it is difficult to predict the interactions of wind power production at different locations. The correlation of wind data does not provide good enough indication of the interaction and it is important to evaluate the production level as well.
Elkraftteknik , Electric power engineering