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작동 조건 변화에 따른 풍력발전 시스템의 동적 특성 해석
남윤수(Yoonsu Nam),윤태준(Tai Jun Yoon),유능수(Neung Soo Yoo) 대한기계학회 2009 大韓機械學會論文集A Vol.33 No.1
A design methodology for control strategy and control structure gives a direct impact on wind turbine's performance and life cycle. A baseline control law which is a variable rotor speed and variable pitch control strategy is introduced, and a mathematic performance model of a wind turbine dynamics is derived. By using a numeric optimization algorithm, the steady state operating conditions of wind turbines are identified. Because aerodynamic interaction of winds with rotor blades is basically nonlinear, a linearization procedure is applied to analyze wind turbine dynamic variations for whole operating conditions. It turns out the wind turbine dynamics vary much depending on its operating condition.
이정완(Lee, Jeong Wan),유능수(Yoo, Neung Soo),남윤수(Nam, Yoon Su),조병하(Cho, Byung Ha) 한국신재생에너지학회 2005 한국신재생에너지학회 학술대회논문집 Vol.2005 No.06
In this paper. we offer a new monitoring system that controls all of the windfar. it can also apply use general wind turbine systems and real meteorological tower. We propose a hierarchical releiable monitoring system connected by wireless communication channels between monitoring host computer and modular slave measuring subsystems. Our system has two hierarchical subsystems: slave measuring systems, and supervisory host computer. We design and implement that the slave measuring subsystems is placed in meteorological tower and wind turbines, and the supervisory host computer in safety zone, The micro-controller in slave measuring system is duplicated using cold-standby method for reliability. The host computer and slave system constructs a feedback system, with wireless communication channel between them. For monitoring and command function, the supervisory computer is implemented with a Personal Computer using graphic user interface. Consequently. we can get a reliable but economic system.
광섬유 브레그격자 센서를 이용한 풍력발전기 날개의 모드 해석
김창환(Chang Hwan Kim),백인수(Insu Paek),유능수(Neung Soo Yoo),남윤수(Yoon Su Nam) 대한기계학회 2011 大韓機械學會論文集B Vol.35 No.5
소형 풍력발전기 날개의 동적 거동에 대한 실험적 연구를 수행하였다. 날개를 따라 배열된 광 브레그 격자 (Fiber Bragg Grating) 센서를 이용하여 날개 표면에서의 변형률(strain)을 측정하였다. 충격 햄머 실험 (Impact Hammer Test)을 통하여, 1차 및 고차 모드의 공진주파수를 측정하였다. 광섬유 센서를 이용한 실험결과를 스트레인 게이지를 이용한 실험 결과와 비교한 결과 모드 주파수는 매우 유사하였다. 하지만, 광섬유 센서의 경우 스트레인 게이지에서 감지하지 못하는 모드를 감지할 수 있었다. 또한, 실험으로부터 얻은 변형률 모드를 이용하여 근사적으로 날개의 변위 모드를 추정하였다. The dynamic behavior of a small wind-turbine blade was analyzed experimentally. Arrays of fiber Bragg-Grating (FBG) sensors attached along the blade were used to measure the strains of the blade surface. An impact test was performed to estimate the resonance frequencies of the fundamental and higher modes of the cantilever blade system developed for this study. The results were similar to the results for conventional strain gages. However, FBG sensors could sense modes that strain gauges could not sense. The strains obtained from the FBG sensor array were used to estimate displacement-mode shapes of the blade.
조병하(Byung-ha Cho),이정완(Jeong-wan Lee),유능수(Neung-soo Yoo),남윤수(Yoon-su Nam),이필엽(Pil-youp Lee) 대한기계학회 2005 대한기계학회 춘추학술대회 Vol.2005 No.5
In this paper, we offer a new monitoring system that controls all of the windfarm. it can also apply use general wind turbine systems and real meteorological tower. We propose a hierarchical reliable monitoring system connected by wireless communication channels between monitoring host computer and modular slave measuring subsystems. Our system has two hierarchical subsystems: slave measuring systems, and supervisory host computer. We design and implement that the slave measuring subsystems is placed in meteorological tower and wind turbines, and the supervisory host computer in safety zone. The micro-controller in slave measuring system is duplicated using cold-standby method for reliability. The host computer and slave system constructs a feedback system, with wireless communication channel between them. For monitoring and command function, the supervisory computer is implemented with a Personal Computer using graphic user interface. Consequently, we can get a reliable but economic system.
Investigation on Selecting Optimal Wind Turbines in the Capacity Factor Point of View
Woo Jae-kyoon(우재균),Kim Byeong-min(김병민),Paek In-su(백인수),Yoo Neung-soo(유능수),Nam Yoon-su(남윤수) 한국태양에너지학회 2011 한국태양에너지학회 논문집 Vol.31 No.5
Selecting optimal wind turbine generators for wind farm sites in the capacity factor point of view is performed in this study. A program to determine the best wind turbine generator for the maximum capacity factor for a site was developed. The program uses both the wind characteristics of the site of interest and the power curves of the wind turbines. The program developed was applied to find out optimal wind turbine generators of three different sites in complex terrain and successfully yielded the best site dependent wind turbine generators. It was also used to determine the best wind turbine generator of the wind farm currently operating in Korea and proved its usefulness. The program and methodology developed in this study considered to be very useful at the initial design stage of the wind farm to determine the best wind turbine generators for the site of interest.
남윤수,유능수,이정완 江原大學校 産業技術硏究所 2002 産業技術硏究 Vol.22 No.A
The accurate wind speed information at the hub height of a wind turbine is very essential to the exact estimation of the wind turbine power performance testing. Several methods on the site calibration, which is a technique to estimate the wind speed at the wind turbine's hub height based on the measured wind data using a reference meteorological mast, are introduced. A site calibration result and the wind resource assessment for the Taekwanryung test site are presented using a one-month wind data from a reference meteorological mast and a temporal mast installed at the site of wind turbine. From this analysis, it turns out that the current location of the reference meteorological mast is wrongly determined, and the self-developed codes for the site calibration are working properly. Besides, an analysis on the uncertainty allocation for the wind speed correction using site calibration is performed.