• Title/Summary/Keyword: 풍력 자원

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Development of SaaS cloud infrastructure to monitor conditions of wind turbine gearbox (풍력발전기 증속기 상태를 감시하기 위한 SaaS 클라우드 인프라 개발)

  • Lee, Gwang-Se;Choi, Jungchul;Kang, Seung-Jin;Park, Sail;Lee, Jin-jae
    • Journal of the Korea Academia-Industrial cooperation Society
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    • v.19 no.9
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    • pp.316-325
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    • 2018
  • In this paper, to integrate distributed IT resources and manage human resource efficiently as purpose of cost reduction, infrastructure of wind turbine monitoring system have been designed and developed on the basis of SaaS cloud. This infrastructure hierarchize data according to related task and services. Softwares to monitor conditions via the infrastructure are also developed. Softwares are made up of DB design, field measurement, data transmission and monitoring programs. The infrastructure is able to monitor conditions from SCADA data and additional sensors. Total time delay from field measurement to monitoring is defined by modeling of step-wise time delay in condition monitoring algorithms. Since vibration data are acquired by measurements of high resolution, the delay is unavoidable and it is essential information for application of O&M program. Monitoring target is gearbox in wind turbine of MW-class and it is operating for 10 years, which means that accurate monitoring is essential for its efficient O&M in the future. The infrastructure is in operation to deal with the gearbox conditions with high resolution of 50 TB data capacity, annually.

Estimating the Vewing Value, Landscape Value, and Net Visit Value of Windpower Turbines in Mountain Areas in Korea Using a Choice Experimentation Method (선택실험법을 사용한 풍력발전소의 산악지역 방문가치 영향 추정: 관람가치, 경관가치, 그리고 순방문가치)

  • Han, Taek-Whan
    • Environmental and Resource Economics Review
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    • v.27 no.3
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    • pp.421-461
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    • 2018
  • Windpower turbines have positive values for visitors with regard to tourism and learning. On the other hand, it is clear that windpower turbines have negative impact on the landscape, particularly when the level of landscape is high. The impact of windpower turbines on the visitor's value is composed of two elements: the viewingvalue which is independent of the level of landscape and the landscape value which varies with the level of landscape. The net visitor's value of windpower turbines is the sum of these two values with opposite signs. This study used a choice experimentation method to value the impact of windpower turbine construction in the mountainous area in Korea. This study estimated the viewing value, the landscape value and the visit value as the sum of the two values. The estimated results demonstrated a significantly positive viewing value, a significantly negative landscape value, and weakly negative net visit value in average.

The Development of Hybrid Power System using small Wind and Solar Energy (소형 풍력과 태양 에너지를 이용한 하이브리드 발전시스템 개발)

  • Kim, Min;Lee, Dong Heon;Jeong, Jae-Hoon;Park, Won-Hyeon;Byun, Gi-Sik;Kim, Gwan-Hyung
    • Proceedings of the Korean Institute of Information and Commucation Sciences Conference
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    • 2015.10a
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    • pp.250-251
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    • 2015
  • The situation requires a global alternative energy resources due to the lack of rapid consumption of fossil fuel and nuclear fuel that occurs in nature. There are a number of alternative energy research and development in the world today. Of which there is an existing wind power generation system has been developed into a large-scale systematic trend of small wind power systems have created a wind power generation system using a simple principle. Existing small wind turbine system is a situation that is in many places a deterioration odor problems and maintenance of power generation efficiency because it came to be developed systematically. In this paper, we developed a hybrid power system that can develop the solar energy at the same time as the increase in the small wind power generation efficiency and the system to develop that can efficiently maintain the hybrid power generation system through the network.

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Development of a Calculation Model for an Optimal Safe Distance between Ship Routes and Offshore Wind Sites (선박 통항로와 해상풍력단지 간 최적의 이격거리 산정 모델 개발)

  • Ohn, Sung-Wook;Namgung, Ho
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.28 no.6
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    • pp.973-991
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    • 2022
  • Globally, several countries with sea are using eco-friendly energy resources through offshore wind power development by overcoming the weak point of the existing power generation method. The sea has the advantage of being able to develop large scale wind farms in wide waters, but the installation of marine structures threatens the safe operation of vessels. Accordingly, a standard guideline for safe navigation by analyzing the mutual effects between ship routes and offshore wind site was presented by the PIANC. Nonetheless, the standard guideline calculated the same safe distance in all situations. Therefore, this study developed a calculation model for an optimal safe distance between ship routes and offshore wind sites by reflecting the ship's maneuvering, encounter situations, environmental force, traffic density, offshore wind power generators, and channel types. As a result of the validation simulation, the developed model showed that the optimal safe distance was secured.

Application of Bypass Flow for Improving Performance of the Vertical Column Pneumatic Separator (수직(垂直)컬럼형(形) 풍력선별기(風力選別機)의 분리효율향상(分離效率向上)을 위한 bypass유로(流路)의 적용(適用))

  • Lee, Gye-Seung;Song, Young Jun;Yotsumoto, Hiroki
    • Resources Recycling
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    • v.22 no.3
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    • pp.65-72
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    • 2013
  • A vertical column pneumatic separator was modified to improve its separation performance. A branch column was installed at the center of the main column, which created a bypass flow and changed the flow rate of the main column before and after the branch column. To separate a mixture comprising light and heavy materials, the airflow in main column after the branch column was set to lift the only light materials and the airflow in main column before the branch column was set to prevent the flow of the light materials from flowing downwards. Materials directed into the branch column were separated from the flow and returned to the feeder through the cyclone linked to the branch column. The performances of the straight-type separator and the modified separator were compared using glass and zirconia beads with a narrow size distribution.

Power Law Exponent in Coastal Area of Northeastern Jeju Island for the Investigation of Wind Resource (풍력자원 조사를 위한 제주 북동부 연안역의 멱지수 분석)

  • Moon, Seo Jeong;Ko, Jung Woo;Lee, Byung Gul
    • Journal of Korean Society for Geospatial Information Science
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    • v.21 no.4
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    • pp.65-71
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    • 2013
  • Wind shear means the variation of wind speed according to the height. Wind shear is the important factor affecting the energy production of wind turbines. Power Law is used to extrapolate wind speed data. Normally, a Power Law exponent of 0.143 is used and this is referred to as the 1/7th Power Law. The Power Law exponent is affected by atmospheric stability and surface roughness of the site. Thus, it is necessary to calculate the Power Law exponent of the site exactly for an accurate estimation of wind energy. In this study, wind resources were measured at the three Met-masts which were located in the coastal area of northeastern Jeju Island. The Power Law exponents of the sites were calculated and proposed using measured data. They were 0.141 at Handong, 0.138 at Pyeongdae, and 0.1254 at Udo. We compared annual energy productions which are calculated using a Power Law exponent of 0.143, the proposed value of the Power Law exponents for each site, and the measured data. As a result, the cases of calculating using the proposed values were more similar to the cases using the measured data than the cases using the 0.143 value. Finally, we found that the propsed values of the Power Law exponent are available to more accurately estimate wind resources.

Estimation of Annual Energy Production Based on Regression Measure-Correlative-Predict at Handong, the Northeastern Jeju Island (제주도 북동부 한동지역의 MCP 회귀모델식을 적용한 AEP계산에 대한 연구)

  • Ko, Jung-Woo;Moon, Seo-Jeong;Lee, Byung-Gul
    • Journal of the Korean Society of Marine Environment & Safety
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    • v.18 no.6
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    • pp.545-550
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    • 2012
  • Wind resource assessment is necessary when designing wind farm. To get the assessment, we must use a long term(20 years) observed wind data but it is so hard. so that we usually measured more than a year on the planned site. From the wind data, we can calculate wind energy related with the wind farm site. However, it calculate wind energy to collect the long term data from Met-mast(Meteorology Mast) station on the site since the Met-mast is unstable from strong wind such as Typhoon or storm surge which is Non-periodic. To solve the lack of the long term data of the site, we usually derive new data from the long term observed data of AWS(Automatic Weather Station) around the wind farm area using mathematical interpolation method. The interpolation method is called MCP(Measure-Correlative-Predict). In this study, based on the MCP Regression Model proposed by us, we estimated the wind energy at Handong site using AEP(Annual Energy Production) from Gujwa AWS data in Jeju. The calculated wind energy at Handong was shown a good agreement between the predicted and the measured results based on the linear regression MCP. Short term AEP was about 7,475MW/year. Long term AEP was about 7,205MW/year. it showed an 3.6% of annual prediction different. It represents difference of 271MW in annual energy production. In comparison with 20years, it shows difference of 5,420MW, and this is about 9 months of energy production. From the results, we found that the proposed linear regression MCP method was very reasonable to estimate the wind resource of wind farm.

Uncertainty Analysis on Vertical Wind Profile Measurement of LIDAR for Wind Resource Assessment (풍력자원평가를 위한 라이다 관측 시 풍속연직분포 불확도 분석)

  • Kim, Hyun-Goo;Choi, Ji-Hwee;Jang, Moon-Seok;Jeon, Wan-Ho
    • 한국신재생에너지학회:학술대회논문집
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    • 2010.06a
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    • pp.185.1-185.1
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    • 2010
  • 원격탐사(remote sensing)란 관측 대상과의 접촉 없이 멀리서 정보를 얻어내는 기술을 말한다. 기상관측분야에는 이미 소다(SODAR) 장비가 폭넓게 사용되거 왔으나 최근 풍력자원평가(wind resource assessment)를 위한 풍황측정에 SODAR와 더불어 라이다(LIDAR)가 적극적으로 활용되기 시작하고 있다. 참고로 SODAR(SOnic Detection And Ranging)는 수직 및 동서 남북 방향으로 음파를 발생시키고 대기유동에 의해 산란 반사된 에코를 수신하여 진동수 변화와 반사에코 강도를 측정하여 각 방향의 에코자료를 벡터 합성함으로써 풍향 및 풍속을 산출하는 원리이다. 반면 LIDAR(Light Detection And Ranging)는 비교적 최근에 풍황측정 용도로 개발된 레이저 탐지에 바탕을 둔 원거리 센서로, 공기입자(먼지, 수증기, 구름, 안개, 오염물질 등)에 의해 산란된 레이저 발산의 도플러 쉬프트(Doppler shift)를 이용하여 풍향 및 풍속을 측정하는 원격탐사 장비이다. 풍력자원평가 측면에서 라이다는 그 정확도가 IEC61400-12에 의거한 풍황탑(met-mast) 측정자료 다수와의 비교검증 실측평가(Albers et al., 2009)를 통하여 입증된 바 있다. 한편 한국에너지기술연구원에서 운용 중인 라이다 시스템은 그림 1의 우측 그림과 같이 1초에 $360^{\circ}$를 스캔하여 50지점에서 반사되는 레이저를 스펙트럼으로 측정하되 설정된 관측높이에서 풍속은 샘플링 부피(sampling volume)의 평균값으로 정의된다. 그런데 샘플링 부피는 설정된 관측높이로부터 상하 12.5m, 총 25m의 높이구간에서 관측한 스펙트럼의 평균값을 그 중앙지점에서의 풍속으로 환산하는 알고리듬(algorithm)을 채택하고 있다. 따라서 비선형적으로 변화하는 풍속연직분포 관측 시 풍속환산 알고리듬에 의한 측정오차가 개입될 가능성이 존재하는 것이다. 이에 본 연구에서는 라이다에 의한 풍속연직분포 측정 시 샘플링 부피의 구간 평균화 과정에서 발생하는 불확도(uncertainty)를 정량적으로 분석함으로써 라이다에 의한 풍속연직분포 관측의 불확도를 정량평가하고자 한다.

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Analytic Study on the Variation of Regional Wind Resources Associated with the Change of El Niño/La Niña Intensity (엘니뇨/라니냐 강도 변화에 따른 국지적 풍력자원의 변동)

  • Lee, Soon-Hwan;Lee, Hwa-Woon;Kim, Dong-Hyuk;Kim, Min-Jung;Kim, Hyun-Goo
    • Journal of the Korean earth science society
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    • v.32 no.2
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    • pp.180-189
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    • 2011
  • In order to clarify the relation between El Ni$\tilde{n}$o/La Ni$\tilde{n}$a and wind resources of the Korean Peninsula, observed meteorological data for 20 years were used in this study. Although the wind speed tends to decrease in Eurasia Continent, it gradually increases in the peninsula for 10 years. The seasonal variation of wind speed due to El Ni$\tilde{n}$o/La Ni$\tilde{n}$a development is not so small and negative anomalies of SST tend to lead the beginning of the wind speed increase over the Korean Peninsula. Wind speed variation caused by the global scale meteorological phenomena is more sensitive in mountainous area than in any other areas because of the relatively weak mesoscale forcing at mountainous area.