• 제목/요약/키워드: Wind power generator

검색결과 709건 처리시간 0.028초

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.

동특성해석을 위한 계통연계 풍력발전 시스템의 모델링 (Modeling of a Grid-Connected Wind Energy Conversion System for Dynamic Performance Analysis)

  • 추연식;노경수
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2002년도 하계학술대회 논문집 B
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    • pp.1358-1360
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    • 2002
  • This paper presents a modeling and simulation of a utility-connected wind energy conversion system with a link of a rectifier and an inverter. It discusses the maximum power control algorithm for the wind turbine and presents the relationship of wind turbine output, rotor speed, power coefficient, tip-speed ratio and wind speed when the wind turbine is operated under the maximum power control algorithm. The control objective is to extract maximum power from wind and transfer the power to the utility. This is achieved by controlling the pitch angle of the wind turbine blades. Pitch control method is mechanically complicated, but the control performance is better than that of the stall regulation method. The simulation results performed on MATLAB will show the variation of generator's rotor speed, pitch angle, and generator output.

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풍속 변동 시 주파수 유지를 위한 풍력발전기 출력 평활화 제어 (Power smoothing scheme of a wind turbine generator for reducing the frequency deviation in varying wind conditions)

  • 김연희;이진식;강용철
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2015년도 제46회 하계학술대회
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    • pp.181-182
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    • 2015
  • In a power system with a high wind power penetration level, the output power of a wind power plant (WPP) might give negative impacts on the frequency control of a power system. This paper proposes a power smoothing scheme of a wind turbine generator (WTG) to reduce the frequency deviation. To do this, an additional control loop is used, the output of which depends on the frequency deviation. The gain of the additional loop is determined depending on the kinetic energy (KE) of a WTG; in the under frequency condition, the gain is set to be proportional to the releasable KE of a WTG; otherwise, it is set to the maximum value. The performance of the proposed scheme is investigated for 100-MW doubly-fed induction generator based WPP using an EMTP-RV simulator under various wind conditions. The results show that the proposed scheme successfully reduces the frequency deviation.

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Studies on a Wind Turbine Generator System using a Shaft Generator System

  • Tatsuta Fujio;Tsuji Toshiyuki;Emi Nobuharu;Nishikata Shoji
    • Journal of Electrical Engineering and Technology
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    • 제1권2호
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    • pp.177-184
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    • 2006
  • In this paper a new dc-link type wind turbine generator system using a shaft generator system, which is widely used for power sources in a ship, is proposed. The basic configuration of the proposed wind turbine generating system is first explained. And the equations expressing the system are derived. Then the steady-state characteristics of the generating system are discussed. We use an experimental system that can simulate the characteristics of a wind turbine in this study, because it is hard to operate an actual wind turbine in a laboratory. In addition, the transient responses of this system are investigated when the velocity of the wind is changed. It is shown that experimental results were very close to the simulated ones, supporting the usefulness of the theory.

유도발전기식 풍력발전시스템의 STATCOM 적용 타당성 분석 (Application Feasibility Analysis of STATCOM for Wind Power System with Induction Generator)

  • 배병열;한병문
    • 한국신재생에너지학회:학술대회논문집
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    • 한국신재생에너지학회 2005년도 제17회 워크샵 및 추계학술대회
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    • pp.702-705
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    • 2005
  • The wind power is known as the most promising future energy source to obtain the electricity. Induction generator is a simple energy conversion wit in the wind power generation system but it consumes the reactive power from the interconnected power system. Switched capacitor banks are normally used to compensate the reactive power, which bring about the transient overvoltage. This paper proposes a method for compensating the reactive power with STATCOM. A detail simulation model for analyzing the interaction between the wind power system and the commercial power system was developed using EMTDC software. The developed simulation model can be effectively utilized to plan the reactive power compensation for newly designed wind power system.

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유도발전기식 풍력발전시스템의 STATCOM 적용 타당성 분석 (Application Feasibility Analysis of STATCOM for Wind Power System with Induction Generator)

  • 한병문;이범규;전영수;이광열
    • 대한전기학회논문지:전력기술부문A
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    • 제53권6호
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    • pp.309-315
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    • 2004
  • The wind power is known as the most promising future energy source to obtain the electricity Induction generator is a simple energy conversion unit in the wind power generation system but it consumes the reactive power from the interconnected power system. Switched capacitor banks are normally used to compensate the reactive power, which bring about the transient overvoltage. This paper proposes a method for compensating the reactive power with STATCOM. A detail simulation model for analyzing the interaction between the wind power system and the commercial power system was developed using EMTDC software. The developed simulation model can be effectively utilized to plan the reactive power compensation for newly designed wind power system.

Maximum Power Point Tracking Control Scheme for Grid Connected Variable Speed Wind Driven Self-Excited Induction Generator

  • El-Sousy Fayez F. M.;Orabi Mohamed;Godah Hatem
    • Journal of Power Electronics
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    • 제6권1호
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    • pp.52-66
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    • 2006
  • This paper proposes a wind energy conversion system connected to a grid using a self-excited induction generator (SEIG) based on the maximum power point tracking (MPPT) control scheme. The induction generator (IG) is controlled by the MPPT below the base speed and the maximum energy can be captured from the wind turbine. Therefore, the stator currents of the IG are optimally controlled using the indirect field orientation control (IFOC) according to the generator speed in order to maximize the generated power from the wind turbine. The SEIG feeds a (CRPWM) converter which regulates the DC-link voltage at a constant value where the speed of the IG is varied. Based on the IG d-q axes dynamic model in the synchronous reference frame at field orientation, high-performance synchronous current controllers with satisfactory performance are designed and analyzed. Utilizing these current controllers and IFOC, a fast dynamic response and low current harmonic distortion are attained. The regulated DC-link voltage feeds a grid connected CRPWM inverter. By using the virtual flux orientation control and the synchronous frame current regulators for the grid connected CRPWM inverter, a fast current response, low harmonic distortion and unity power factor are achieved. The complete system has been simulated with different wind velocities. The simulation results are presented to illustrate the effectiveness of the proposed MPPT control scheme for a wind energy system. In the simulation results, the d-q axes current controllers and DC-link voltage controller give prominent dynamic response in command tracking and load regulation characteristics.

횡자속형 영구자석 풍력발전기의 정상 및 과도상태 특성해석 (Analysis of Steady and Transient-State Characteristics of Axial-Flux Permanent-Magnet Wind-Turbine Generator)

  • 황돈하;강도현;김용주;최경호;배성우;김동희
    • 전력전자학회:학술대회논문집
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    • 전력전자학회 2002년도 추계학술대회 논문집
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    • pp.78-81
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    • 2002
  • The paper discuses characteristics of an axial-flux permanent-magnet generator for a gearless wind energy system which aims to be satisfied with variable operating conditions. Design and construction of an axial-flux permanent- magnet generator with power output at 60[Hz], 300[r/min] for wind energy system is introduced. Finite-element method (FEM) is applied to analyze generator performance at variable load. The results of FE analysis show this generator Is feasible for use with a wind turbine.

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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.

풍력발전 설비용 IEC 61400-25 기반 통신 시스템 구축 (Implementation of IEC 61400-25 based communication system for wind power plants)

  • 이정훈;김태오;이홍희
    • 전기학회논문지
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    • 제58권7호
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    • pp.1356-1362
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    • 2009
  • IEC 61400-25(Communications for monitoring and control of wind power plants) is established as a international standard by IEC TC 88 in 2007 with the growth of the wind power industry. In this paper, MMS service which is defined in lEC 61400-25 part 4 is implemented, and the wind power generator is objectified by using the VMD of MMS service. We also implemented MMS communication system between the wind power generator and the local control center using the proposed VMD. The performance of the developed MMS communication system is verified through the XML based user interface on the web browser.