• 제목/요약/키워드: wind generation

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풍력발전의 최대전력점 추종제어 방법에 관한 연구 (A study on the Maximum Power Point Tracking Control System of Wind Power Generation)

  • 고석철;이재;임성훈;강형곤;한병성
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2001년도 추계학술대회 논문집 Vol.14 No.1
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    • pp.153-156
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    • 2001
  • Maximum Power Point Tracking(MPPT) is used in wind power generation systems to maximize wind power turbin output power, irrespective of wind speed conditions and of the load electrical characteristics. In this paper we do the equivalent modeling the mechanical energy of wind power turbine according to wind speed into the synchronous generator. We analyse the equivalent modeling output part of rectifier into DC/DC converter input part theoretically. We design a control algorithm for variable voltage according to wind speed intensity and density so that load voltage of chopper is controlled steadily using the maximum power point tracking (MPPT) control method. We analyse a battery charging characteristics and a charging circuit for power storage enabling the supply of stable power to the load. We design a system and do the modeling of it analytically so that it supplies a stable power to the load by constructing a DC-AC inverter point. Also we design a charging circuit usable in actual wind power generation system of 30kW and confirm its validity.

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풍력발전의 최대전력점 추종제어 방법에 관한 연구 (A study on the Maximum Power Point Tracking Control System of Wind Power Generation)

  • 고석철;이재;임성훈;강형곤;한병성
    • 한국전기전자재료학회:학술대회논문집
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    • 한국전기전자재료학회 2001년도 추계학술대회 논문집
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    • pp.153-156
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    • 2001
  • Maximum Power Point Tracking(MPPT) Is used in wind power generation systems to maximize wind power turbin output power, irrespective of wind speed conditions and of the load electrical characteristics. In this paper we do the equivalent modeling the mechanical energy of wind power turbine according to wind speed into the synchronous generator. We analyse the equivalent modeling output part of rectifier into DC/DC converter input part theoretically. We design a control algorithm for variable voltage according to wind speed intensity and density so that load voltage of chopper is controlled steadily using the maximum power point tracking(MPPT) control method. We analyse a battery charging characteristics and a charging circuit for power storage enabling the supply of stable power to the load. We design a system and do the modeling of it analytically so that it supplies a stable power to the load by constructing a DC-AC inverter point. Also we design a charging circuit usable in actual wind power generation system of 30kW and confirm its validity.

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독립형 소형 태양광/풍력 복합발전시스템의 출력안정화를 위한 보조 전력보상장치개발에 관한 연구 (The Auxiliary Power Compensation Unit for Stand-Alone Photovoltaic/Wind Hybrid Generation System)

  • 박세준;윤정필;강병복;윤형상;차인수;임중열
    • 한국태양에너지학회 논문집
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    • 제24권3호
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    • pp.47-54
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    • 2004
  • Photovoltaic energy and wind energy are highly dependent on the season, time and extremely intermittent energy sources. Because of these reasons, in view of the reliability the photovoltaic and the wind power generation system have many problems(energy conversion, energy storage, load control etc.) comparing with conventional power plant. In order to solve these existing problems, hybrid generation system composed of photovoltaic(500W) and wind power system(400W) was suggested. But, hybrid generation system cannot always generate stable output due to the varying weather condition. So, the auxiliary power compensation unit that uses elastic energy of spiral spring was added to hybrid generation system for the present study. It was partly confirmed that hybrid generation system was generated a stable outputs by spiral spring was continuously provided to load.

지상 경계층 풍동 설계를 위한 CFD의 적용 (Application of CFD to Design Atmospheric Boundary Layer Wind Tunnel)

  • 장병희
    • 한국전산유체공학회:학술대회논문집
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    • 한국전산유체공학회 2001년도 추계 학술대회논문집
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    • pp.37-43
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    • 2001
  • The methods of atmospheric boundary layer generation in test section were reviewed. To utilize conventional aerodynamic wind tunnels as atmospheric wind tunnels, boundary layer growth should be accelerated. To achieve this, improvement of boundary layer generation devices is required and it might be done by CFD. In this respect, CFD application cases in boundary generation devices were reviewed and potential areas were considered. Some cases are tried by Fluent 5 code.

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풍력발전시스템의 적응백스테핑 위치제어기 설계 (Design of an Adaptive Backstepping Position Controller for the Wind Power Generation System)

  • 현근호
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2007년도 제38회 하계학술대회
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    • pp.1227-1229
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    • 2007
  • In this paper a robust controller using adaptive backstepping technique is proposed to control the position of wind power generation system. To make wind power generation truly cost effective and reliable, advanced and robust control algorithms are derived to on-line adjust the excitation winding voltage of the generator based on both mechanical and electrical dynamics. This method is shown to be able to achieve smooth and asymptotic rotor speed tracking, as justified by analysis and computer simulation.

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HeMOSU-1호 관측풍속의 불확실성을 고려한 서남해안의 풍력 발전량 예측 (Prediction of Wind Power Generation at Southwest Coast of Korea Considering Uncertainty of HeMOSU-1 Wind Speed Data)

  • 이기남;김동현;권오순
    • 신재생에너지
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    • 제10권2호
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    • pp.19-28
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    • 2014
  • Wind power generation of 5 MW wind turbine was predicted by using wind measurement data from HeMOSU-1 which is at south west coast of Korea. Time histories of turbulent wind was generated from 10-min mean wind speed and then they were used as input to Bladed to estimated electric power. Those estimated powers are used in both polynominal regression and neural network training. They were compared with each other for daily production and yearly production. Effect of mean wind speed and turbulence intensity were quantitatively analyzed and discussed. This technique further can be used to assess lifetime power of wind turbine.

로직기반의 퍼지뉴럴 네트워크를 이용한 풍력발전기 출력예측 (Estimation of wind turbine power generation using logic-based fuzzy neural networks)

  • 강종진;예송범;차종현;김윤건;강경호;탁동규;한창욱
    • 대한전기학회:학술대회논문집
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    • 대한전기학회 2009년도 제40회 하계학술대회
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    • pp.1112_1113
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    • 2009
  • This paper proposes the method to predict the wind turbine power generation using logic-based fuzzy neural networks. To predict the wind turbine power generation neural networks, logic-based fuzzy neural networks, and fuzzy neural models have been considered. But the model considered in this paper can predict the wind turbine power generation with a less complex structure. The simulation results show the effectiveness of the proposed method.

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풍력-디젤 하이브리드 발전시스템 모델링에 관한 연구 (Modeling of Hybrid Generation System with Wind Turbine and Diesel Generator)

  • 김재언
    • 한국산학기술학회논문지
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    • 제13권4호
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    • pp.1806-1813
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    • 2012
  • 본 논문은 도서지역에서 현실적으로 가장 간단히 적용될 수 있는 풍력-디젤 하이브리드 발전시스템의 모델링 방법을 제시하였다. 모델링 대상으로는 풍력발전기는 농형유도발전기를, 디젤발전기는 동기발전기를 대상으로 하였고, 각각에 대한 파라미터 설정과 제어기의 모델링은 현재 제작 및 판매되고 있는 소용량급들에 대한 자료수집과 분석을 통하여 도출된 기준값에 근거하였다. 제안된 풍력-디젤 하이브리드 발전시스템 모델링방법의 타당성을 입증하기 위하여 국내 낙도지역을 대상으로 하여 모델링하고, 그 결과를 시뮬레이션하여 고찰하였다.

DFIG 풍력터빈이 연계된 전력계통의 CCT 영향분석 (CCT Analysis of Power System Connected to DFIG Wind Turbine)

  • 서규석;박지호
    • 한국산학기술학회논문지
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    • 제14권5호
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    • pp.2388-2392
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    • 2013
  • 풍력발전시스템은 기존의 발전시스템과 매우 다르다. 그러므로 전력계통에 풍력시스템을 연계하기 위해서는 동적특성에 대한 연구가 필요하다. 풍력발전기의 안정도해석은 전력계통의 운영에 있어서 중요 쟁점이다. 기존의 동기발전기만으로 구성된 전력계통의 위상각 안정도는 풍력발전기가 포함되면 그 결과가 달라진다. 즉, 풍력터빈에 연계된 발전기는 대부분 비동기인 유도발전기이기 때문이다. 위상각의 동기화 여부로 판별하는 위상각 안정도는 임계고장제거시간(CCT)을 계산하여 평가한다. 계통해석용 풍력터빈의 모델은 다양하여 그 해석에 어려움이 있으나 지금은 크게 4가지 타입으로 표준화가 되어있다. 본 논문에서는 PSS/E-32에서 제공하는 풍력터빈의 3번째 표준모델인 DFIG(Doubly-Fed induction Generator)모델을 이용하여 풍력단지가 연계된 전력계통의 CCT를 풍력단지의 위치와 용량을 고려하여 분석한다.

Large eddy simulation of wind effects on a super-tall building

  • Huang, Shenghong;Li, Q.S.
    • Wind and Structures
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    • 제13권6호
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    • pp.557-580
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    • 2010
  • A new inflow turbulence generation method and a combined dynamic SGS model recently developed by the authors were applied to evaluate the wind effects on 508 m high Taipei 101 Tower. Unlike the majority of the past studies on large eddy simulation (LES) of wind effects on tall buildings, the present numerical simulations were conducted for the full-scale tall building with Reynolds number greater than $10^8$. The inflow turbulent flow field was generated based on the new method called discretizing and synthesizing of random flow generation technique (DSRFG) with a prominent feature that the generated wind velocity fluctuations satisfy any target spectrum and target profiles of turbulence intensity and turbulence integral length scale. The new dynamic SGS model takes both advantages of one-equation SGS model and a dynamic production term without test-filtering operation, which is particular suitable to relative coarse grid situations and high Reynolds number flows. The results of comparative investigations with and without generation of inflow turbulence show that: (1) proper simulation of an inflow turbulent field is essential in accurate evaluation of dynamic wind loads on a tall building and the prescribed inflow turbulence characteristics can be adequately imposed on the inflow boundary by the DSRFG method; (2) the DSRFG can generate a large number of random vortex-like patterns in oncoming flow, leading to good agreements of both mean and dynamic forces with wind tunnel test results; (3) The dynamic mechanism of the adopted SGS model behaves adequately in the present LES and its integration with the DSRFG technique can provide satisfactory predictions of the wind effects on the super-tall building.