• Title, Summary, Keyword: Windturbine

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Design and Verification of Disturbace Observer based Controller for Windturbine with Two Cooperative Generators (두 대의 협력적인 발전기를 갖는 풍력발전기의 외란관측기 기반 제어기의 설계 및 검증)

  • Lee, Kook-Sun;Cho, Whang;Back, Ju-Hoon;Choy, Ick
    • The Journal of the Korea institute of electronic communication sciences
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    • v.12 no.2
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    • pp.301-308
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    • 2017
  • This paper proposes a disturbance observer based controller design method for generating and yawing control of windturbine with two cooperative generators. Windturbine system with two cooperative generators is a distinct structure in which the wind energy supplied by blade axis is converted into electrical energy by two cooperative generators. In this structure, two generators can be controlled independently and therefore they can generate power, simultaneously performing yawing control of nacelle without extra yawing mechanism by cooperatively controlling generating load in appropriate manner. Using this structural trait, this paper designs a disturbance observer based controller that enables the windturbine system with cooperative generators to generate and yaw stably, and verifies the performance of the controller experimentally by applying it to a small-scale windturbine system with the same structure.

Assessment of Optimal Constitution Rate of Windturbine and Photovoltaic Sources for Stable Operation of Microgird (마이크로그리드의 안정적 운영을 위한 풍력 및 태양광 발전원 최적 구성 비율 산정 방안 연구)

  • Lee, Su-Mi;Chun, Yeong-Han
    • The Transactions of The Korean Institute of Electrical Engineers
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    • v.59 no.2
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    • pp.272-276
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    • 2010
  • Renewable energy sources are considered to be environment-friendly alternatives those are increasingly introduced in the power systems. Microgrid is one of the systems in which renewable sources have a main role as a energy suppliers. Decision of constitution rates of renewable energy sources is very important for the economical and stable operation of microgird systems. In this paper, we present a method to assess an optimal constitution rate of renewable sources especially of windturbine and photovoltaic systems.

Transformer-less Inverter for Photovoltaic and small unit Windturbine System (태양광 및 소단위 풍력발전용 변압기 없는 인버터)

  • 박영산;김윤식;이성근;안병원;배철오
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • pp.333-336
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    • 2003
  • Designed transformer-less inverter for photovoltaic and small unit windturbine power system. This system consisted of boost chopper circuit of multiple-switching method and foil bridge PWM inverter. Transformer-less system was adapted to reduce cost and size. But in this system, earth-leakage current have to be considered. So, to solve this problem, we used PWM inverter switching method to reduce the earth-leakage current which flows in accordance with the variation of DC input common mode voltage.

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A Study for the Effect on the Uncertainty of Power Performance Testing of Windturbine by a Site Calibration (Site calibration이 풍력발전시스템 성능시험 불확도에 미치는 영향 연구)

  • Kim, Keon-Hoon;Hyun, Seung-Gun
    • Journal of the Korean Solar Energy Society
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    • v.31 no.2
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    • pp.107-112
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    • 2011
  • A comparison study between two performance testing results, one is on the site calibration not needed and the other is needed, was proceeded for the understanding on the effect of site calibration on the complex terrain. As a result, it is revealed that all of uncertainty components is effected by the topographical features dramatically. And the maximum difference of uncertainty reached at around 8% of rated capacity of wind turbine. So, the site calibration is an effective method to remove the variable wind effect by the ground complexity and must be proceeded before the power performance testing of a wind turbine.

Transformer-less Inverter for Photovoltaic and small unit Windturbine System (태양광 및 소단위 풍력발전용 변압기 없는 인버터)

  • 박영산
    • Journal of the Korea Institute of Information and Communication Engineering
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    • v.8 no.2
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    • pp.407-412
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    • 2004
  • Designed transformer-less inverter for photovoltaic and small unit windturbine power system. This system consisted of boost chopper circuit of multiple-switching method and full bridge PWM inverter. Transformer-less system was adapted to reduce cost and size. But in this system, earth-leakage current have to be considered. So, to solve this problem, we used PWM inverter switching method to reduce the earth-leakage current which flows in accordance with the variation of DC input common mode voltage.

Industrial Trend Analysis of Windturbine's Part and System (풍력발전기 부품 및 시스템의 산업동향 분석)

  • Kwon, young-il
    • Proceedings of the Korea Contents Association Conference
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    • pp.554-556
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    • 2010
  • 풍력발전기의 수요가 유럽에서 북미, 아시아로 확대되고 있으며, 육상 풍력발전에 비해 대형 발전기 설치에 공간적 제약이 없는 해상 풍력발전이 선진국들에 의해 채택되고 있고 발전기의 대형화(Repowering)를 통한 에너지효율 증대, 단위 용량당 건설비 감소 등의 유리한 점 때문에 풍력발전기가 대형화되는 추세이다.

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Mppt control of PMSG wInd power system using adaptive sliding mode control (적응 슬라이딩 모드제어를 통한 PMSG 풍력발전시스템의 MPPT제어)

  • Jeong, Hyeong-Cheol;Chun, Kwan-Ho
    • Proceedings of the KIEE Conference
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    • pp.1060-1061
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    • 2015
  • This paper presents the control method of MPPT (Maximum Power Point Tracking) using back-to- back converter. The windturbine system use PMSG(ermanent Magnet Synchronous Generator) system considering low maintenance costs and driving performance at low wind. This paper use the adaptive sliding mode control to the torque control. Proposed method was analyzed mathematically.

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Study for Monitoring System for Windturbine (풍력발전기용 모니터링 시스템에 대한 연구)

  • Lee, Se-Na;Lee, Sang-Hyeok;Jung, Seung-Tae;Park, Sung-Jun
    • Proceedings of the KIPE Conference
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    • pp.105-106
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    • 2010
  • 최근 경제성의 경쟁력과 개발 연구 대상으로서의 가치를 충분히 지닌 풍력 발전 단지 조성이 증가하고 있는 추세이다. 이러한 풍력 발전 단지는 많은 기술과 인력, 비용을 기반으로 구축되어지므로 이를 실시간으로 감시할 수 있는 원격 모니터링 시스템이 필요하다. 본 논문에서는 여러 가지 인터넷 프로토콜을 지원하는 하드웨어 형태의 Serial to TCP/IP 통신 변환 모듈을 사용하여 풍력발전기기의 소스데이터를 sensing하는 프로세서로부터 RS232 통신을 통해 데이터를 입력받아 사용자의 PC까지 전송해주는 비교적 가벼운 디바이스를 활용하여 간략화된 모니터링 루틴을 갖는 시스템을 제안한다.

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Study of Power Quality Measurement U57 Windturbine (U57 풍력발전기 전력품질 실증연구)

  • Lee, Byung-Chul;Park, Hee-Chul;Hwang, Jin-Su;Ryu, Ji-June
    • 한국신재생에너지학회:학술대회논문집
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    • pp.310-314
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    • 2008
  • The exploitation of the wind energy resource is a rapidly growing area world-wide. The number of installed units is continuously increasing, and it is important to respect and to deal with the impact of wind turbine. This paper addresses the power quality characteristics of U57 Wind Turbine. 750kW gearless type wind turbine for low wind speed, named U57, is developed by UNISON. The power quality measurement system consists of measuring WTG output current, line-to line voltage and wind speed signal. With using measured data, power quality measurement is evaluated about maximum power, reactive power, voltage fluctuation, harmonics according to IEC 61400-21.

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