• 제목/요약/키워드: Rated wind speed

검색결과 97건 처리시간 0.03초

수직축 Darrieus 풍력발전 시스템의 설계에 관한 기초연구 (A Basic Study on the Desist of Vertical Axis Darrieus Turbine for Wind-Power Generating System)

  • 서영택;김기승;오철수
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 1994년도 하계학술대회 논문집 A
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    • pp.82-84
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    • 1994
  • This paper presents a design of vertical axis Darrieus wind turbine for wind-power generating system. The wind turbine consists of two troposkien blades, diameter is 10m approximately, and chord length 380mm, tip ratio speed 4. The design of turbine is laid for the main data of rated wind speed 10m/s, turbine speed 78rpm, the generating power is estimated to 25kW, and this is contorted to commercial power line by means of three phase synchronous generator-inverter system.

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NREL 5MW 풍력터빈 제어용 저주파 통과 필터와 드라이브 트레인 댐퍼의 효과 고찰 (A Study on the Effect of Low Pass Filter and Drive Train Damper for the NREL 5MW Wind Turbine Control)

  • 임채욱
    • 한국산업융합학회 논문집
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    • 제24권4_2호
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    • pp.443-451
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    • 2021
  • It is essential to examine and analyze the power output and load responses together using real-world turbulent wind speeds. In this paper, the power controller and the drive train damper are simultaneously considered using the NREL 5MW wind turbine model, and the damage equivalent load(DEL) of the low speed shaft torque and power output responses according to the natural frequency of the second order low pass filter are simultaneously investigated. Numerical testing is carried out above rated wind speed using commercially available Bladed software. From the viewpoints of DEL reduction of the drive train shaft torque and power output responses, it is shown that the natural frequency of the low pass filter is appropriately about 6 to 10rad/s. And the reduction ratio of the DEL of the low-speed shaft torque decreases as the wind speed becomes higher, and it is confirmed that the reduction ratio is limited to about 20% at high wind speeds.

넓은 풍속에서의 풍력발전용 권선형 유도발전기의 정출력.고역률 운전 (Constant power. high power factor drive of DFIG for wind power generation in the wide wind speed)

  • 이우석;김광태;정순용;손제봉;배종문
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2000년도 하계학술대회 논문집 B
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    • pp.693-695
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    • 2000
  • Wide operating range and speed control is needed for wind power generating and a Doubly Fed Induction Generator(DFIG) has good adaptivity for that purpose. This paper deals with power and power factor control using the Grid connected DFIG in the wide speed regions, by controlling frequency and voltage fed to the rotor. Power flow of the DFIG and steady-state algebraic equations of the equivalent circuit are analyzed. For a normal operating region, in which the generator ratings were not exceeded, the rotor current was either less than or equal to the rated value. Accordingly, the optimal power factor can be selected relative to the permissible rated current at the rotor coil which controls the magnitude of the injected rotor voltage to the rotor according to a given rotor frequency.

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풍력터빈 토크제어의 특성 고찰 (A Study on Properties of Torque Control for Wind Turbine)

  • 임채욱
    • 제어로봇시스템학회논문지
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    • 제15권12호
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    • pp.1157-1162
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    • 2009
  • The aerodynamic torque and power caused by the interaction between the wind and blade of wind turbine are highly nonlinear. For this reason, the overall dynamic behaviors of wind turbine have nonlinear characteristics. The aerodynamic nonlinearity also affects properties of torque control for wind turbine. In this paper, the nonlinear aerodynamic property according to the wind speed below rated power and its effects on the torque control system are investigated. Nonlinear parameter representing change of aerodynamic torque with respect to rotor speed is obtained by linearization technique. Effects of this aerodynamic nonlinear parameter on the closed-loop torque system with PI controller for an 1.5 MW wind turbine are presented.

도서지역 적용을 위한 230 kW급 저풍속 중형 풍력발전기의 전자장해석 (Electromagnetic Field Analysis of 230 kW-class Low Wind Speed Medium Wind Turbine for Island-area Application)

  • 최만수;최혜원;이창민;최현준
    • 신재생에너지
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    • 제16권2호
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    • pp.14-19
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    • 2020
  • Recently, a project to build a carbon zero island with no carbon emissions has been carried out by replacing diesel generators with renewable energy sources in island areas where diesel generators supplied local loads as independent systems. To minimize damage to the lives of islanders, low noise wind generators should be installed by adjusting the rated speed. In islands with low loads, wind turbines that are more efficient than medium-sized wind turbines should be installed. In this study, the generator field analysis and characteristics were analyzed to develop 230 kW-class low wind medium-wind turbine technology. The electromagnetic field analysis program used Maxwell. As a result, the cogging torque was reduced, and the initial maneuver wind speed and loss value were lowered. Hence, the output amount was increased with high efficiency.

중형 풍력터빈의 출력 및 타워 하중저감 제어기 설계 (Design of Power and Load Reduction Controller for a Medium-Capacity Wind Turbine)

  • 김관수;백인수;김철진;김현규;김형길
    • 한국태양에너지학회 논문집
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    • 제36권6호
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    • pp.1-12
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    • 2016
  • A control algorithm for a 100 kW wind turbine is designed in this study. The wind turbine is operating as a variable speed variable pitch (VSVP) status. Also, this wind turbine is a permanent magnet synchronous generator (PMSG) Type. For the medium capacity wind turbine considered in this study, it was found that the optimum tip speed ratios to achieve the maximum power coefficients varied with wind speeds. Therefore a commercial blade element momentum theory and multi-body dynamics based program was implemented to consider the variation of aerodynamic coefficients with respect to Reynolds numbers and to find out the power and thrust coefficients with respect tip speed ratio and blade pitch angles. In the end a basic power controller was designed for below rated, transition and above rated regions, and a load reduction algorithm was designed to reduce tower vibration by the nacelle motion. As a result, damage equivalent Load (DEL) of tower fore-aft has been reduced by 32%. From dynamic simulations in the commercial program, the controller was found to work properly as designed. Experimental validation of the control algorithm will be done in the future.

리그레션 방법을 이용한 최대출력제어 풍속예측 (Wind Speed Estimation using Regression Method for Maximum Power Control)

  • 고승윤;김호찬;허종철;강민제
    • 한국지능시스템학회논문지
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    • 제25권4호
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    • pp.327-333
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    • 2015
  • 풍력 터빈은 정격 풍속 미만일 때는 최대 출력을 내기위한 제어를 한다. MPC(Maximun Power Control)제어방법은 발전기의 회전속도를 제어하여 최대 출력을 내는 방법인데 풍속을 알아야한다. 하지만 여러 가지 이유로 풍속을 실측하기보다는 풍속을 예측하여 사용하는 방법들이 제안되고 있다. 풍속예측은 TSR(Tip Speed Ratio)을 알아야 하는 데, TSR은 복잡한 관계식을 풀어야 한다. 그래서 TSR을 구하기 위해 다양한 방법들이 소개되고 있다. 본 논문에서는 TSR을 쉽고 빠르게 구하기 위하여 복잡한 관계식을 리그레션을 이용하여 간단한 방정식으로 근사화하는 방법을 제안하였다. 제안된 방법은 Matlab/Simulink 시뮬레이션을 통하여 제대로 작동하는 것을 확인하였다.

난류풍속에 대한 MW급 풍력터빈의 토크제어 방법에 따른 응답 특성 비교 (Comparison of Response Properties Determined in Two Torque Control Methods for a 2.75-MW Wind Turbine Under Turbulence Wind Speed)

  • 임채욱;서강윤
    • 대한기계학회논문집A
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    • 제34권12호
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    • pp.1885-1891
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    • 2010
  • 풍력터빈의 토크제어는 정격풍속 이하에서 매우 중요하다. 토크제어의 주된 목적은 바람이 가진 공기역학적 파워로부터 최대의 파워를 얻도록 하는 것이다. 풍력터빈의 토크제어 방법은 토크모드 제어와 속도모드 제어로 크게 두 경우로 구분된다. 토크모드 제어는 풍력터빈에서 잘 알려지고 전통적으로 사용되는 방법으로 발전기 회전속도의 제곱에 비례하도록 발전기의 토크크기를 발생시킨다. 속도모드 제어에서는 발전기의 토크크기를 발생하기 위하여 PI 제어기를 사용한다. 본 논문에서는 실제 풍속이 난류인 점을 고려하여 2.75 MW 풍력터빈을 대상으로 두 토크제어 방법을 적용한 수치실험 결과를 제시하고 응답특성을 비교한다.

풍력발전기용 복합재 윈드터빈 블레이드의 설계 개발 시험 (Design Development Test for Composite Wind Turbine Blade)

  • 이충훈;정성훈;박지상;김태욱
    • 한국복합재료학회:학술대회논문집
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    • 한국복합재료학회 2004년도 춘계학술발표대회 논문집
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    • pp.22-25
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    • 2004
  • This paper describes method and procedure for DDT (Design Development Test) of composite wind turbine blade composites. The test type of DDT is bending test, such as cantilever beam, based on the rated wind speed of wind power generation system. DDT was carried out in order to compare with the result of FEM analysis, characterize structural stability, verify manufacturing process and review test method of full scale blade.

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수직축 풍력발전기의 해석에 관하여 (On the Analysis of Vertical-axis Wind Rotor)

  • 김광호;김정오
    • 대한기계학회논문집
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    • 제3권2호
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    • pp.60-67
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    • 1979
  • Aerodynamic forces acting on a curved blade are computed theoretically taking into account the variation of wind speed over the blade to investigate the performance of a vertical axis wind rotor. It is shown that the rotor does not self start at the rated wind speed without a supplementary starting device and that most of the power output is contributed by the central portion of the rotor, and the use of spoilers for limiting the maximum rotational speed is needed for safety. It is also shown that provision of skew angle to the blade does not improve the starting characterstics and only reduces the maximum power output. The effects of geometric variables such as skew angle, blade solidity and ratio of the rotor height to diameter are also discussed.