• 제목/요약/키워드: Wind Turbine

검색결과 2,030건 처리시간 0.031초

풍동과 예인 수조를 이용한 터빈 성능 비교 시험 (A Comparative Performance Test for Turbine in Wind Tunnel and Towing Tank)

  • 강정민;이영호;이규찬
    • 신재생에너지
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    • 제7권4호
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    • pp.42-49
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    • 2011
  • The objective of this paper is to suggest a new method of a wind turbine performance test. The performance test of a wind turbine is generally carried out in a wind tunnel. The test needs not only a high-accuracy measuring system but also durable structure to withstand high speed turbine rotation and wind flow. Therefore, we tried turbine performance test using a towing tank to improve stability and reliability. Because a turbine rotates more slowly and generates more torque in the water than in the wind tunnel under similarity conditions. In this study, we developed turbine performance test systems and verified the turbine test method using a towing tank through comparing results of the wind tunnel and the towing tank test.

탄성 다물체 동역학 해석기법을 이용한 풍력터빈 드라이브트레인의 동특성 해석 (Simulation Technique of Wind Turbine Dynamic Behavior using Multibody FEM Analysis)

  • 이승규;임동수;박영수;김진;최원호
    • 대한기계학회:학술대회논문집
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    • 대한기계학회 2008년도 추계학술대회A
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    • pp.817-821
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    • 2008
  • Wind turbine requires service life of about 20 years and each components of wind turbine requires high durability, because installation and maintenance costs are more expensive than generated electricity by wind turbine. So the design of wind turbine must be verified in various condition before production step. This paper demonstrates the application of a generic methodology, based on the flexible multibody simulation technique, for the dynamic analysis of a wind turbine and its drive train. The concern of the paper is the computation of dynamic loads of wind turbine in emergency-stop condition. The finite element model is used to analyse the dynamic behaviour of the wind turbine.

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Ride-through of PMSG Wind Power System Under the Distorted and Unbalanced Grid Voltage Dips

  • Sim, Jun-Bo;Kim, Ki-Cheol;Son, Rak-Won;Oh, Joong-Ki
    • Journal of Electrical Engineering and Technology
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    • 제7권6호
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    • pp.898-904
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    • 2012
  • This paper presents a ride-through skill of PMSG wind turbine system under the distorted and unbalanced grid voltage dips. When voltage dips occur in the grid, pitch control and generator speed control as well as a parallel resistor of DC-link help to keep the turbine's safety. Modern grid code requires a wind turbine to supply reactive currents to help voltage recovery after grid faults clearance. In order to supply reactive currents to the grid in case of the distortedly unbalanced grid voltage dips, a special PLL is needed to control the grid side converter and to regulate the grid voltages symmetrically. The proposed method is applied to 2MW multi-pole PMSG wind turbine system, and verified by simulation.

주위 경관을 고려한 360 W급 풍력터빈나무 설계 및 유동해석 (Design and CFD study of 360 W class wind turbine tree in accordance with environmental scenery)

  • 하민수;정원혁;최낙준;박영철
    • Journal of Advanced Marine Engineering and Technology
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    • 제37권1호
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    • pp.78-84
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    • 2013
  • 이 논문은 수직축 헬리컬 풍력터빈을 이용한 360 W급 풍력터빈나무(wind turbine tree)를 개발하는데 목적이 있다. 설계를 수행한 100 W 급 헬리컬 풍력터빈을 공력해석을 통해 성능을 예측하였다. 풍력터빈 1개의 성능 분석을 한 후 하나의 풍력단지와 같이 하나의 풍력터빈 나무에 4개의 풍력터빈을 설치하여 유동해석 시 출력의 변화를 확인하였다. 본 연구의 결과로부터 수직축 헬리컬 풍력터빈 나무의 결과를 속도분포와 압력분포로 도출하였고, 수치해석으로부터 정격출력 360 W 이상을 확보할 수 있음을 확인하였다.

Simulation for Pitch Angle Control Strategies of a Grid-Connected Wind Turbine System on MATLAB/Simulink

  • 노경수;최준호
    • 조명전기설비학회논문지
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    • 제21권1호
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    • pp.91-97
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    • 2007
  • This paper presents a pitch angle controller of a grid-connected wind turbine system for extracting maximum power from wind and implements a modeling and simulation of the wind turbine system on MATLAB/Simulink. It discusses the maximum power control algorithm for the wind turbine and presents, in a graphical form, the relationship of wind turbine output, rotor speed, and power coefficient with wind speed when the wind turbine is operated under the maximum power control algorithm. The objective of pitch angle control is to extract maximum power from wind and is achieved by regulating the blade pitch angle during above-rated wind speeds in order to bypass excessive energy in the wind. Case studies demonstrate that the pitch angle control is carried out to achieve maximum power extraction during above-rated wind speeds and effectiveness of the proposed controller would be satisfactory.

Wind Turbine Simulator for Comparative Study of MPPT Controls

  • Putri, Adinda Ihsani;Ahn, Minho;Choi, Jaeho
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2012년도 전력전자학술대회 논문집
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    • pp.128-129
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    • 2012
  • This paper proposed the wind turbine simulator for comparative study of the MPPT controls. The development of this wind turbine simulator is based on the torque controlled induction motor. The torque reference is obtained from a mathematical model of wind turbine whereas the inputs are rotor speed, wind speed and fixed-value of pitch angle. By using this wind turbine simulator, the real wind is not needed. Wind speed information can be stored and regenerated anytime. Hence it is possible to apply the same wind speed condition to different MPPT controls. With the same wind speed condition, it can fairly compare the advantages and disadvantages of the MPPT controls. The proposed wind turbine simulator is verified through PSIM simulation.

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Performance Comparison of Two Wind Turbine Generator Systems Having Two Types of Control Methods

  • Saito, Sumio;Sekizuka, Satoshi
    • International Journal of Fluid Machinery and Systems
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    • 제2권1호
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    • pp.92-101
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    • 2009
  • The purpose of this paper is to gain a greater understanding of the performance of practical wind turbine generating systems with differing output power controllers and controlling means for wind turbine speed. Subjected wind turbines, both equipped with an asynchronous power generator, are located at two sites and are defined as wind turbine A and wind turbine B in this study, respectively. Their performance differences are examined by measuring wind speed and electric parameters. The study suggests that both wind turbines have a clear linkage between current and output power fluctuations. Comparison of the fluctuations to wind speed fluctuation, although they are triggered primarily by wind speed fluctuation, clearly indicates the specific behaviors inherent to the respective turbine control mechanisms.

The wind tunnel measuring methods for wind turbine rotor blades

  • Vardar, Ali;Eker, Bulent
    • Wind and Structures
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    • 제7권5호
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    • pp.305-316
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    • 2004
  • In this study, a wind tunnel, that has been developed for experiments of wind turbine rotor blades, has been considered. The deviations of the measurements have been examined after this wind tunnel had been introduced and the measurements on it had been explained. Two different wind turbine rotor blades miniatures have been used for getting better results from the experiments. The accuracy of measurements have been experimented three times repetitively and examined statistically. As a result, wind speed values which this type of wind tunnel and wind turbine rotors need for starting, wind speed in the tunnel, temperature and moisture values, the number of rotor's revolution, and the voltage that is produced in 102 ${\Omega}$ resistance and current values have been determined to be fixed by measurements used. This type of wind tunnel and wind turbine rotor' performance difference and the difference of revolution figures have been determined to be fixed by measurements used.

도로 중앙분리대용 후드장식형 수직축풍력발전기 연구 (A Study of Hood-Type Vertical Axis Wind Turbine Embedded to Highway Median Strip)

  • 이종조;임재규
    • 조명전기설비학회논문지
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    • 제27권1호
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    • pp.24-34
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    • 2013
  • This paper introduces the study of hood-type wind turbine embedded on highway median strip. Recently, many studies are being made to apply to small wind turbine in city. This study is wind turbine producing electricity generated from the wind by running cars. In order to analyze wind generated by running cars, we measured experiments using running cars and buses. Also, using CFD and interpreter program, we analysis wind turbines performance and applied to the twist-sabonius blade. This wind turbine attached to safety lamp on the road is produced to use electricity generated through the wind tunnel experiment. In this paper results, this wind turbine system is expected to produce the power source installed the heat ray and safety lamps on the road.

전산유체역학을 이용한 풍력터빈 축소효과 수치해석 (Numerical Analysis of Wind Turbine Scale Effect by Using Computational Fluid Dynamics)

  • 박영민;장병희
    • 한국신재생에너지학회:학술대회논문집
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    • 한국신재생에너지학회 2006년도 춘계학술대회
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    • pp.269-272
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    • 2006
  • Numerical analysis of wind turbine scale effect was performed by using computational fluid dynamics. For the numerical analysis of wind turbine. Three dimensional Navier-Stokes solver with various turbulence models was tested and realizable k-e turbulence model was selected for the simulation of wind turbines. To validate the present method, performance of NREL (National Renewable Energy Laboratory) Phase VI wind turbine model was analyzed and compared with experiment and blind test data. Using the present method, numerical simulations for various size of wind tunnel model were carried out and characteristics were observed in detail. The power loss due to the interference between wind turbine and nacelle was also computed for relatively larger nacelle installation in wind tunnel test. The present results showed good correlations with experimental data and reasonable trends of scale effect of wind turbine.

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