POWER DEVIATION ANALYSIS OF THE ROCKNEBY WIND FARM
Independent thesis Advanced level (degree of Master (One Year)), 10 credits / 15 HE creditsStudent thesis
Nowadays the globalization and the economy expansion of the emerging countries demand anincreasing amount of energy. Therefore, energy production as well as the efficiency of energyusage, is essential for future developments of societies. Renewable energies appear as a turnkeysolution that could support the growing demands, and at the same time not being harmful to theenvironment . Within the types of renewable energies, wind energy could be considered asone with large potential.In this paper I present the study of a Swedish wind farm placed in Rockneby.Once the wind turbines were installed and working correctly, a discrepancy between the realenergy obtained and the theoretical energy indicated by the manufacturer was detected. Thestored data in the SCADA system were compared with the values provided by the manufacturerand several analyses were performed. Initially an anomaly in the power residual deviation wasdetected. It was showing an unusual behaviour at high wind speeds. The variation of the airdensity in the wind farm at hub height was considered as a possible reason of the disagreementobserved in the power parameters since the reference density used by the manufacturer was aconstant value calculated in laboratory environment. However, this idea was rejected becausethe power generated in both conditions is similar. The pitch angle was analysed after detectinga significant variations in wind speed measurements made by the anemometer in the turbinenumber three. As a result, it was found a pitch variation in the turbine which seems due to afailure in the anemometer. As a final result, the turbulences were analysed giving as aconclusion that the turbulence intensity were situated around 20%. Therefore, I mainly suggestas a possible explanation of this fact the influence of the turbulence accompanied of a badcalibration or failure in the anemometers.
Place, publisher, year, edition, pages
2015. , 65 p.
Wind farm, turbulences, power deviation, power analysis
IdentifiersURN: urn:nbn:se:hh:diva-28453OAI: oai:DiVA.org:hh-28453DiVA: diva2:818352
Subject / course
2015-06-02, Halmstad, 10:15 (English)
Ottermo, Fredric, Universitetslektor Energiteknik
Hylander, Jonny, Professor Energiteknik