• 제목/요약/키워드: Wind Turbine Generator

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An integrator based wind speed estimator for wind turbine control

  • Elmaati, Younes Ait;El Bahir, Lhoussain;Faitah, Khalid
    • Wind and Structures
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    • 제21권4호
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    • pp.443-460
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    • 2015
  • In this paper, an integrator based method to estimate the effective wind speed in wind turbine systems is proposed. First, the aerodynamic torque was accurately estimated through a proportional gain based observer where the generator speed is the measured output of the system. The torque signal contains not only useful frequencies of the wind, but also high frequencies and the ones due to structural vibration. The useful information of the wind signal is low frequency. A spectral analysis permitted the determination of the useful frequencies. The high frequencies were then filtered before introducing the torque signal in the wind speed observer. The desired effective wind speed was extracted through an integrator based observer using the previously estimated aerodynamic torque. The strength of the method is to avoid numerical solutions used in literature of the wind speed estimation. The effectiveness of the proposed wind speed estimator and its use to control the generator speed has been tested under turbulent situations using the FAST software (Fatigue, Aerodynamics, Structures, and Turbulence), for large scale Megawatt turbine.

영구자석동기발전기 풍력시스템의 하드웨어 시뮬레이터 개발 (Development of Hardware Simulator for PMSG Wind Power System)

  • 이두영;윤동진;정종규;양승철;한병문;송승호
    • 전기학회논문지
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    • 제57권6호
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    • pp.951-958
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    • 2008
  • This paper describes development of hardware simulator for the PMSG wind power system, which was designed considering wind characteristic, blade characteristic and blade inertia compensation. The simulator consists of three major parts, such as wind turbine model using induction motor, PMSG generator, converter-inverter set. and control system. The turbine simulator generates torque and speed signals for a specific wind turbine with respect to given wind speed. This torque and speed signals are scaled down to fit the input of 2kW PMSG. The PMSG-side converter operates to track the maximum power point, and the grid-side inverter controls the active and reactive power supplied to the grid. The operational feasibility was verified by computer simulations with PSCAD/EMTDC, and the implementation feasibility was confirmed through experimental works with a hardware set-up.

풍속 변화에 따른 발전기 온도 및 전력변환장치 효율에 관한 연구 (A Study on Generator Temperature and Power Converter Efficiency according to change of Wind Velocity)

  • 송영상;한운기;정진수;임현성;조성구;전태현
    • 조명전기설비학회논문지
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    • 제29권7호
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    • pp.8-13
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    • 2015
  • Recently, because a renewable power source must operate as a constant rate in accordance with RPS(Renewable Portfolio Standard), the study of the renewable power sources has been ongoing. Especially because of noise of wind turbine, troubleshooting, and urban greening business, research related with small wind turbine are underway. The economics and reliability are important parts for the activation of small wind turbine, such as solar energy. In this paper, by analyzing the temperature variations for each location and efficiency of power conversion devices in accordance with short period wind speed changes in simulation test, we reviewed the safety about temperature variations of wind generator and the method of selection of power converter.

발전기 속도 변화율을 이용한 신경망피치제어기 (Neural Network Pitch Controller of Wind Turbine using Changing Rate of Generator Speed)

  • 홍민호;김호찬;허종철;강민제
    • 한국지능시스템학회논문지
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    • 제24권4호
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    • pp.366-371
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    • 2014
  • 본 논문에서는 정격풍속 이상에서 발전량을 일정하게 유지하기 위하여 회전속도의 변화율을 이용한 신경망 피치제어기가 제안되었다. 제안된 신경망 피치제어기는 발전기의 정격 회전속도와 현재 회전속도의 차이를 기본정보로 사용하고 추가적으로 발전기 회전속도의 변화율을 사용하였다. 시뮬레이션은 Matlab/simulink에서 수행되었으며, 시뮬레이션을 통해 제안된 피치제어기를 사용한 풍력발전기는 발전기의 정격 회전속도인 122.9[rad/s]로 잘 유지 되는 것을 확인하였다.

영구자석형 풍력-디젤-BESS 복합발전시스템 모델링 및 운전제어 알고리즘에 관한 연구 (Modeling & Operating Algorithm of Hybrid Generation System with PMSG Wind Turbine, Diesel Generator and BESS)

  • 오준석;정의용;박종호;박민수;김재언
    • 전기학회논문지
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    • 제65권5호
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    • pp.724-729
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    • 2016
  • Nowadays high-cost energy storage system using flywheel or secondary battery is applying to hybrid generation system with WT(Wind Turbine) and diesel generator in island areas for stable operation. This paper proposes an operating algorithm and modeling method of the hybrid generation system that can operate for variable wind speed and load, which is composed of energy storage system, variable-speed PMSG(Permanent Magnet Synchronous Generator) WT and diesel generator applied in island areas. Initially, the operating algorithm was proposed for frequency and voltage to be maintained within the proper ranges for load and wind speed changes. Also, the modeling method is proposed for variable speed PMSG WT, diesel generator and BESS(Battery Energy Storage System). The proposed operating algorithm and modeling method were applied to a typical island area. The frequency and voltage was kept within the permissible ranges and the proposed method was proven to be appropriate through simulations.

PMSG 풍력 터빈의 특성을 고려한 발전 시스템 시뮬레이션 (PMSG Wind Turbine Simulation under the consideration of real characteristics)

  • 심준보;김명호;박기현;한경섭
    • 한국신재생에너지학회:학술대회논문집
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    • 한국신재생에너지학회 2010년도 추계학술대회 초록집
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    • pp.182.2-182.2
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    • 2010
  • A various algorism has been studied to extract possibly every energy from a wind turbine in conjunction with the increase of concern about wind power system. In order to verify these control algorism, it is essential to make the most similar conditions to the real wind turbine's environment. Therefore, using separately excited DC motor a wind turbine the most similar to the real turbine is simulated. Tower shadow effect and Wind shear effect are considered as well as inertia emulation. For the control of Back-to-Back Converter Vector current control methods and space vector pulse width modulation are used and for reducing THD of grid current LCL filter is considered. This simulation results verified the energy produced by wind all flows into the utility under the consideration of the characteristics of a wind turbine. The result of this paper is expected to be used as a basic material for analyzing the characteristics of the wind turbine generator.

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DFIG 풍력발전시스템에 관한 연구 (Study on Doubly Fed Induction Generator in a wind turbine)

  • 한상열;차삼곤;최원호;이승구
    • 한국신재생에너지학회:학술대회논문집
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    • 한국신재생에너지학회 2006년도 춘계학술대회
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    • pp.253-256
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    • 2006
  • This paper shows operating characteristics of DFIG(Double Fed Induction Generator) for wind turbine. The back to back PWM voltage-fed inverter connected between the rotor and grid network operated sub and super-synchronous operating mode, and the vector-controlled DFIG enables the decoupling between active and reactive power as well as between torque and power factor. This paper is validated by simulations and experimental results.

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Flicker Suppression Scheme for Variable-Speed Wind Turbine Systems

  • Van, Tan Luong;Nguyen, Thanh Hai;Lee, Dong-Choon
    • Journal of Power Electronics
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    • 제12권2호
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    • pp.333-343
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    • 2012
  • This paper proposes a strategy of flicker mitigation for doubly-fed induction generator (DFIG) wind turbine systems. In the weak grid system where the grid impedance ratio is low, the reactive power compensation only cannot suppress the flicker sufficiently due to the limited power capacity of the converters or the DFIG. For the full suppression of flickers, the active power smoothening using the energy storage system (ESS) needs to be utilized together with the reactive power compensation. The effectiveness of the proposed method is verified by PSCAD/EMTDC simulation results for a 2[MW] DFIG wind turbine system and by experimental results for a 3[kW] wind turbine simulator.

계통 연계 대관령 풍력실증단지에서의 전력 품질 모니터링 (A Power Quality Monitoring of The Grid-connected Wind Turbine in Daegwallyeong Test Site)

  • 권혁준;김광호;장성일;유능수
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2004년도 하계학술대회 논문집 B
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    • pp.1513-1515
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    • 2004
  • This paper describe the power quality monitoring results of the grid-connected wind turbine generator in Daegwallyeong Test Site. The power quality monitoring for grid-connected wind turbine generators are important to verify their performance as the grid-connected generators. In order to measure the impacts on the grid of wind turbine generator and evaluate the performance by analyzing electrical parameters, we equipped the power quality monitoring system in the real field of the Daegwallyeong test site. The developed monitoring system gathers information by remote access through the internet. The monitoring results and the detail explanation for the developed wind turbine monitoring system is presented in the study.

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750kW급 Gearless형 국산화 풍력발전시스템 (750kW Gearless Type Wind Turbine Generator System)

  • 류지윤;박진일;김대현;황진수;김두훈
    • 한국신재생에너지학회:학술대회논문집
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    • 한국신재생에너지학회 2006년도 춘계학술대회
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    • pp.245-248
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    • 2006
  • The first of korean 750kW gearless type wind turbine is developed. The wind turbine is designed, manufactured and tested by GE regulation and obtained the design certificate by GL. And the performance test is being performed at the demonstration site now. This paper presents the history of development and performance test for 750kW gearless type wind turbine.

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