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3㎿급 IEC Wind Class IIa 풍력발전시스템 개발
이기학(K.H. Lee),이상일(S.I. Lee),우상우(S.W. Woo),오인규(I.G. Oh),박종포(J.P. Park) 한국전산유체공학회 2011 한국전산유체공학회 학술대회논문집 Vol.2011 No.5
This paper introduces the design concepts and characteristics of WinDS3000™(TC IIa) which is a trade name of Doosan’s 3㎿ offshore/onshore wind turbine. WinDS3000™(TC IIa) has been designed in consideration of high Reliability, Availability, Maintainability and Serviceability (RAMS) and low cost of electricity (COE) for the TC IIa condition based on GL guideline. An integrated drive-train design with an innovative three-stage gearbox has been introduced to minimize nacelle weight of the wind turbine and to enhance a high reliability for transmission. A permanent magnet generator with full converter system has been introduced to get higher efficiency in partial load operation and grid-friendly system for both 50 ㎐ and 60 ㎐. A pitch-regulated variable speed control system has been introduced to control wind turbine power while generator reaction torque can be adjusted almost instantaneously by the associated power electronics. The wind turbine has been also equipped with condition monitoring and diagnostic systems in order to meet maintainability requirements.
RDAPS Sea Wind Model을 이용한 해상풍력발전단지 최적 Macro-Siting
이기학(K.H. Lee),전상욱(S.O. Jun),박경현(K.H. Park),이동호(D.H. Lee),박종포 한국전산유체공학회 2011 한국전산유체공학회 학술대회논문집 Vol.2011 No.5
This paper introduces the optimum macro-siting of a potential site for an offshore wind farm around Jeju Island using the RDAPS sea wind model. The statistical model was developed by analyzing the sea wind data from RDAPS model, and the meso-scale digital wind map was prepared. To develop the high resolution spatial calibration model, Artificial Neural Network (ANN) models were used to construct the wind and bathymetric maps. Accuracy and consistency of wind/bathymetric spatial calibration models were obtained using analysis of variance. The optimization problem was defined to maximize the energy density satisfying the criteria of maximum water depth and maximum distance from the coastline. The candidate site was selected through Genetic Algorithm(GA). From the results, it is possible to predict roughly a candidate site location jar the installation of the offshore wind farm, and to evaluate the wind resources of the proposed site.
우상우(S.W. Woo),김현태(H.T. Kim),이진형(J.H. Lee),이기학(K.H. Lee),박종포(J.P. Park) 한국전산유체공학회 2011 한국전산유체공학회 학술대회논문집 Vol.2011 No.5
Wind power system is generally divided into the onshore wind turbine and the offshore wind turbine according to site locations. The offshore wind turbine is manufactured as a closed nacelle cooling system including a heat exchanger to prevent corrosion, but the onshore wind turbine is manufactured as open nacelle cooling system dependent on only the outdoor air without a heat exchanger. The indoor of a nacelle which is composed of a generator, full power converters and a gearbox with a lot of heat is very narrow and airtight. This aim of the study is to demonstrate the temperature effect depending on positions of air-supply and exhaust ports. And this study discusses the flow field and removal efficiency of heat caused by components.