Modelovanje i analiza uticaja prostornog i vremenskog profila snage vetra u projektovanju i eksploataciji vetroelektrana u elektroenergetskom sistemu
Modeling and analysis of influence of spatial and temporal wind power profile on the design and exploitation of wind farms in electric power system
Докторанд
Đurišić, Željko
Ментор
Đurišić, Željko
Чланови комисије
Đurić, MilenkoRajković, Borivoj
Stojković, Zlatan
Vukosavić, Slobodan
Метаподаци
Приказ свих података о дисертацијиСажетак
Predmet istraživanja doktorske disertacije je modelovanje i analiza uticaja prostornog i
vremenskog profila snage vetra u projektovanju i eksploataciji vetroelektrana u
elektroenergetskom sistemu (EES). Osnovni doprinosi radu su:
1. Razvijen je model za visinsku ekstrapolaciju merenih podataka o brzini vetra za
procenu proizvodnje vetroelektrana. Model se bazira na metodi minimuma sume
kvadrata odstupanja. Primenom ovog modela na set merenih podataka o brzini vetra
sa najmanje tri visine dobija se sintetički set mernih podataka o brzini vetra na
željenoj visini postavljanja vetroturbine. Estimirana baza mernih podataka se može
koristiti kao ulazni set podataka za profesionalne softvere za regionalnu analizu
resursa vetra, kao i procenu proizvodnje vetroelektrana. Algoritam je testiran
korišćenjem realnih merenih podataka o brzini vetra sa tri lokacije koje karakterišu
različiti topografski i klimatski uslovi. Sprovedene analize pokazuju da visinska
ekstrapolacija merenih podataka o brz...ini vetra, prema predloženom modelu, daje
bolje rezultate u proceni resursa energije vetra i smanjuje grešku u proceni
proizvodnje vetroelektrana u odnosu na klasičnu primenu programa WAsP, koji
standardno koristi podatke samo sa jedne merne visine.
2. Razvijen je model dinamičkog koeficijenta smicanja vetra. Visinski profil brzine vetra
se u vetroenergetici opisuje sa dva modela i to stepenim zakonom i logaritamskim
zakonom. Oba modela se praktično podjednako koriste u inženjerskoj praksi.
Nedostatak oba modela je što u sebi sadrže fiksne parametre, koji ne omogućavaju
dinamičko sagledavanje profila brzine vetra. Kombinujući ova dva pristupa u tezi je
analitički raspregnut uticaj dominantnih faktora koji utiču na visinski profil brzine
vetra. U razvijenom modelu visinski profil brzine vetra se modeluje sa koeficijentom
smicanja vetra koji ima dve komponente: jednu statičku, koja je posledica hrapavosti
terena, i drugu, vremenski promenljivu komponentu, koja uvažava dijabatske
promene visinskog profila brzine vetra. Razvijeni model ima značajnu praktičnu
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primenu u regionalnoj analizi potencijala energije vetra, kao i u proceni prosečne
višegodišnje proizvodnje vetroelektrane na osnovu kratkoročnih merenja. Praktična
primenljivost modela je testirana na realnim projektima vetroelektrana u regionu
Banata i Pešterske visoravni...
The research subject in this dissertation is the modeling and analysis of the effects of
spatial and temporal profiles of wind power in the design and operation of wind farms
in power systems. The main contributions of this work are:
1. A new mathematical model for vertical extrapolation of the measurement data for
wind speed taken at several measurement heights. The model is based on the method
of least squares (LES). By applying the proposed model on the sets of measured data
taken at least at three measurement heights, one can obtain a synthetic set of data at a
desired height where the wind power potential is analyzed. The basic idea is that
during the process of estimation of the wind power potential, the measurement data
are first extrapolated by the proposed method, and then by using program WAsP the
spatial extrapolation is carried out. The algorithm is tested by one year wind speed
measurement data taken at three locations characterized by different topographies of
the terrain... and different climatic conditions. The performed analyses show that preprocessing
of measurement data by the proposed method results in a better estimate
of the wind power potential at a height which is greater than the measurement heights
compared to that obtained by the standard application of WAsP program which
makes use of measurement data taken at one measurement height.
2. A new model for dynamic wind shear coefficient. In wind energy, the height profile
of the wind speed is usually described by two models based on exponential and
logarithmic law. Both models are almost equally used in engineering practice. The
principle lack of both models is that they contain fixed parameters, which do not
allow the dynamic consideration of wind speed profiles. Combining these two
approaches, the analytical decoupling of the dominant factors affecting the height
profile of the wind speed is provided. In the developed model, height profile of the
wind speed is modelled with two parameters, one static, which is a consequence of
the terrain roughness, and other time-varying parameter, which is the consequence of
atmospheric stability. The developed model has important practical applications in
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regional analysis of wind energy potential, as well as in long term wind resource
assessment. The practical applicability of the model was tested on real projects of
wind farms in the region of Banat and the Pester plateau...
Факултет:
Универзитет у Београду, Електротехнички факултетДатум одбране:
07-06-2013Пројекти:
- Интелигентне енергетске мреже (RS-42009)