• Journal of the Korean Solar Energy Society
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• v.31 no.5
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• pp.19-26
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• 2011

복잡지형에서의 풍력단지 CFD 모델링을 통한 시뮬레이션 결과가 이 논문에 주어졌다. 이 연구를 위하여 작은 산(오름)들로 둘러싸인 제주도 성산 풍력단지가 선택되었고, 두 개의 주풍향에 대하여 ANSYS CFX로 시뮬레이션 하였다. 격자생성을 위하여 실제 지형데이터가 사용되었고, 풍력발전기와 복잡지형으로부터 발생하는 후류효과를 예측하기 위하여 SST 난류모델 및 액추에이터 디스크 모델이 적용되었다. 그 결과, 성산 풍력단지 주변에 있는 작은 산 및 풍력발전기에서 발생하는 후류의 영향은 3~7 km 계속된다고 예측되었다. 또한 그 후류는 풍속 및 난류강도에 상당한 영향을 미치고 있다고 예측되었다.

• Journal of the Korean Society of Marine Environment & Safety
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• v.24 no.7
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• pp.841-847
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• 2018

Since global energy consumption and demand for energy have dramatically risen, a focus on environmental problems and sustainability has become more important. Clean and renewable energy sources such as offshore wind power generation have received attention among new renewable energy options as alternative energy resources. Due to maintenance and operational perspectives, offshore wind farms have been planned for installation in many coastal waters. However, development of offshore wind farms faces interference from existing maritime traffic along the planned areas. In order to safely and effectively govern marine traffic in the vicinity of wind farms and inner areas, standard criteria are suggested to allow vessels to sail the internal waters of offshore wind farm areas. Therefore, the purpose of this study is to establish allowable criteria for sailing vessels and safety zones for offshore wind farms by investigating the local regulations of various offshore wind farm cases overseas. The commended inner safety zone of wind farms is proposed to be a distance of 150 % of the rotation diameter of the wind turbine rotor and a distance of 200 m from the outer wind turbine for the outer safety zone. Besides this, the allowable criteria for sailing vessels within a wind farm is proposed to have an air draft of 14.47 m south-west wind farm sea areas for a minimum margin to avoid hull contact through evaluation of the tide and height of a wind turbine. further studies will be needed to establish vessel sailing criteria among adjacent offshore wind farms as well as vessel sailing criteria within a single offshore wind farm.

• Journal of Energy Engineering
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• v.14 no.2 s.42
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• pp.123-132
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• 2005

An economic feasibility study is performed for the wind power generation with the examination of the wind speed and its distribution at Daekwanryung at which a wind fm is under construction. In this analysis, the distribution of wind speed is the key issue. The wind distribution which is usually expressed in terms of Weibull distribution with shape factor and scale factor needs to be reexamined to find the proper values of them according to the empirical wind speed data. After this kind of analysis is done, annual power generation of wind is calculated. Due to the lack of cost information, we applied EWEA data instead or the actual information from the site. The result would be of use to determine the 'reference price' of wind power under the current system of 'compensating subsidy for renewable power generation'.

• Journal of the Korean Geographical Society
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• v.49 no.6
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• pp.833-848
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• 2014

The assessment of the current and future climate change-induced potential wind energy is an important issue in the planning and operations of wind farm. Here, the authors analyze spatiotemporal characteristics and variabilities of wind energy over Korean Peninsula in the near future (2006-2040) using Representative Concentration Pathway(RCP) scenarios data. In this study, National Institute of Meteorological Research (NIMR) regional climate model HadGEM3-RA based RCP 2.6 and 8.5 scenarios are analyzed. The comparison between ERA-interim and HadGEM3-RA during the period of 1981-2005 indicates that the historical simulation of HadGEM3-RA slightly overestimates (underestimates) the wind energy over the land (ocean). It also shows that interannual and intraseasonal variability of hindcast data is generally larger than those of reanalysis data. The investigation of RCP scenarios based future wind energy presents that future wind energy density will increase over the land and decrease over the ocean. The increase in the wind energy and its variability is particularly significant over the mountains and coastal areas, such as Jeju island in future global warming. More detailed analysis presents that the changes in synoptic conditions over East Asia in future decades can influence on the predicted wind energy abovementioned. It is also suggested that the uncertainty of the predicted future wind energy may increase because of the increase of interannual and intra-annual variability. In conclusion, our results can be used as a background data for devising a plan to develop and operate wind farm over the Korean Peninsula.

• 월간 기계설비
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• s.223
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• pp.70-71
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• 2009

• Journal of Wind Energy
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• v.5 no.2
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• pp.45-50
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• 2014

Reviewing the capacity and timing of Southwest sea offshore wind farms, additional farms developing, and potential farms, we devised the long-term plan of domestic offshore wind farms development. In order to rank many wind farms, we determined evaluation indicators and weights of priority. We applied economic and preliminary factors such as wind grade, depth of water, distance from substations, farms scale, MOU signed, and feasibility studies. After deciding the ranking of wind farms by the scores, we planed domestic long-term scenarios of offshore wind farms development to meet national energy policy objectives.

• Proceedings of the KIPE Conference
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• 2004.07b
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• pp.506-510
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• 2004

Our fossil fuels will be exhausted and replaced with renewable energies over tile next few decades. And rapidly increasing consumption of primary makes every country recognize the potential significance of climate change and necessity of greenhouse gas reduction. A critical part of the solution is to ratify the Kyoto Protocol and the UNFCC, and to develop and utilize the wind energy. One of the renewable energies, wind energy is increasing competitive in liberalised energy markets and shows annual growth rate of $20\~30\% in past five years. Thus, the purpose of this paper is to describe the necessity and characteristics of wind energy industries, to compare the international development policies of wind energy industries, and to suggest and discuss the alternative development policies of wind energies in Korea

• The Journal of the Korea institute of electronic communication sciences
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• v.13 no.3
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• pp.547-554
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• 2018

Wind energy is widely recognized as one of the cheapest forms of clean and renewable energy. In fact, in several countries, wind energy has achieved cost parity with fossil fuel-based sources of electricity generation for new electricity generation plants. Offshore wind energy development promises to be a significant domestic renewable energy source for the target of korea government 3020 plan. A pivotal activity during the development phase of a wind project is wind resource assessment. Several approaches can be categorized as three basic scales or stages of wind resource assessment: preliminary area identification, area wind resource evaluation, and micrositing. This study is to estimate the wind power capacity of chonnam province offshore area using three basic stages based on the six meteorological mast data. WindPRO was used, one of a well-known wind energy prediction programs and based on more than 25 years of experiences in development of software tools for wind energy project development. The design results of offshore wind power generation capacity is calculated as total 2.52GW with six wind farms in chonnam offshore area.

• Proceedings of the Korea Information Processing Society Conference
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• 2011.04a
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• pp.3-6
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• 2011

IT 기술의 발전에 따른 전력 사용량 증가로 인해서 친환경 재생 에너지에 대한 관심이 집중되고 있는 상황으로 다양한 재생 에너지자원 가운데 풍력에너지 개발이 전 세계적으로 급속히 증가하고 있다. 그러나 풍력발전기를 제어하는 제어기의 소프트웨어·하드웨어적인 문제로 인해 불규칙한 에너지 생산과 유지보수를 위한 비용이 증가함에 따라 최근에는 풍력제어기의 고장분석 및 고장 감내 제어에 대한 연구가 활발히 진행되고 있는 상황이다. 본 논문에서는 이와 같은 풍력발전기가 지속적으로 일정한 에너지 생산과 유지보수 절감이 가능하도록 하기 위해 풍력제어시스템 차원에서의 고장에 대해서 감내 가능한 고가용성의 미들웨어에 대한 구조를 제안한다. 풍력제어시스템의 고 가용성 미들웨어는 가상 운영체제를 기반으로 이중화 구조를 가지고 있으며, 주 운영체제에서 소프트웨어적인 고장이 발생 시 다음 우선순위의 가상 운영체제에서 지속적인 서비스를 제공할 수 있도록 각각의 가상 운영체제 환경을 관리한다.

• Journal of Aerospace System Engineering
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• v.17 no.6
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• pp.94-99
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• 2023

Recently, renewable energy has been widely used as a source of wind energy and solar energy due to the shortage of fossil fuels and environmental problems. Against this backdrop, wind energy is emerging as an important energy source, and the wind power market is showing rapid growth worldwide. In this study, a high-efficiency wind turbine blade was designed with an integrated blade aerodynamic design for prior research on separate blades. The blade airfoil was applied as NACA 4418, and it was verified by comparing it with the analysis results to evaluate the newly designed blade.