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국내풍속보정에 적합한 Deacon 방정식의 기하평균높이 산정방법에 대한 연구
정의헌(Cheang Eui-Heang),문채주(Moon Chae-Joo),정문선(Jeong Moon-seon),조규판(Jo Kyu-Pan),박귀열(Park Gui-Yeol) 한국태양에너지학회 2010 한국태양에너지학회 논문집 Vol.30 No.4
The main cause of global warming is carbon dioxide generated from the use of fossil fuels, and active research on the reduction of carbon is in progress to slow down the increasing global warming. Wind turbines generate electricity from kinetic energy of wind and are considered as representative for an energy source that helps to reduce carbon emission. Since the kinetic energy of wind is proportional to the cube of the wind speed, the intensity of wind affects wind farm construction validity the most. Therefore, to organize a wind farm, validity analysis should be conducted first through measurement of the wind resources. To facilitate the approval and permission and reduce installation cost, measuring sensors should be installed at locations below the actual wind turbine hub. Wind conditions change in shape with air density, and air density is most affected by the variables terrain and surface type. So the magnitude of wind speed depends on the ground altitude. If wind conditions are measured at a location below the wind turbine hub, the wind speed has to be extrapolated to the hub height. This correction of wind speed according to height is done with the Deacon equation used in the statistical analysis of previously observed data. In this study, the optimal Deacon equation parameter was obtained through the analysis of the correction of the wind speed error with the Deacon equation based on the characteristics of terrain.
정의헌(Cheang Eui Heang),문채주(Moon Chae Joo),곽승훈(Kwak Seung Hun),정문선(Jung Moon Sun) 한국태양에너지학회 2009 한국태양에너지학회 학술대회논문집 Vol.2009 No.11월
Current wind turbine units that are used primarily 3Blade type devices or large-scale wind-term capacity of 2㎿ of 60m~90m Blade diameter is applied. This is not the best suitable design with the designing condition for the special quality of wind condition in the South-West Coastal Areas of Korea where the wind speed frequency of average wind speed and over 10㎧ high wind velocity is fairly low. For this matter, in this dissertation, the expecting generation amount of electric power is measured excluding a mechanical moment, considering wind power energy traveling to the Blade when 60m~120m blade is applied, based on 2㎿ wind generator. Also, we would like to propose the Blade diameter which is fitted by wind condition of South-West Coastal Areas of Korea.
정의헌(Cheang Eui-Heang),문채주(Moon Chae-Joo),김의선(Kim Eui-Sun),장영학(Chang Young-Hak) 한국태양에너지학회 2009 한국태양에너지학회 논문집 Vol.29 No.6
There has been a continuous increase in the utilization and utility value of renewable energy such as wind power generation in modern society. Wind condition is the absolute variable to the energy volume in the case of a wind power generation system. For this reason, wind power generators have already been installed in areas where wind velocity is high and the possibility of danger is very low. In other words, instability is likely if the wind velocity in an area is high and where a wind power generation system can be built. On the contrary, low wind velocity is possible in an area with high stability. Therefore, the design and manufacture of a wind power generation system should be carried out in a more complicated topography in order to secure a bigger market. This study examines and suggest how topography affects wind shear by analyzing the measured data in order to predict wind power generation more reliably.
문채주(Moon Chae-Joo),정의헌(Cheang Eui-Heang),심관식(Shim Kwan-Shik),정권성(Jung Kwen-Sung),장영학(Chang Young-hak) 한국태양에너지학회 2008 한국태양에너지학회 논문집 Vol.28 No.6
This paper discussed the Feasibility study of wind power generation considering the topographical characteristics of Korea. In order to estimate the exact generation of wind power plants. we analyzed and compared wind resources in mountain areas and plain areas by introducing not only wind speed. the most important variable, but also wind distribution and wind standard deviation that can reflect the influence of landform sufficiently. According to the results of this study, generation was almost the same at wind power plants installed in southwestern coastal areas where wind speed was low as at those installed in mountain areas in Gangwondo where wind speed was high. This demonstrates that the shape parameter of wind distribution is low due to the characteristics of mountain areas, and the standard deviation of wind speed is large due to the effect of mountain winnds, therefore, actual generation compared to southwestern coastal areas is almost similar in mountain areas even though wind speed is high.
문채주(Chae-joo Moon),정의헌(Eui-heang Cheang) 한국조명·전기설비학회 2008 한국조명·전기설비학회 학술대회논문집 Vol.2008 No.10월
본 논문에서는 서남해안 실측풍속데이터를 통하여 풍황을 분석하고, WindPro, WAsP등의 풍력발전 시뮬레이션 프로그램을 이용하여 지형 및 풍황특성에 맞추어 23[㎿]급의 풍력발전단지를 설계하였다. 본 논문에서 제안하는 풍력발전단지의 연간 총발전량은 61,134.9㎿h로써 이용률은 30.3%이다.
정문선(Jung Moon-sun),문채주(Moon ChaeJoo),정의헌(Cheang Eui-Heang),김태훈(Kim Tae-Hoon),장영학(Chang Young-Hak) 한국태양에너지학회 2010 한국태양에너지학회 학술대회논문집 Vol.2010 No.4
Vertical distribution of wind speed is subjected to the Power Law on wind speed and height. 10m high Met Mast which was set up by Korea Meteorological Administration to measure wind speed aiming at analyzing its impact on human life can't be used in forecasting wind power generation. Therefore, it is general to operate the Met Mast for the purpose of investigating the validity of wind power generation, and the height of a mast is becoming higher as most of current size of wind power generators requiring higher masts. However, it is more common to installation it within 60m height due to economical factors and permission/approval system factors. Height correction wind speed is calculated by using Deacon equation, and surrounding area's geometrical mean height, ground roughness , measure height are included in internal parameter. In addition to this, by applying 2 data of actual measurement of wind speed which is acquired in different height into Deacon equation, it is calculated by extrapolation. In this study, by comparing vertical distribution which is calculated using Roughness length rating of Risø and Roughness length rating in accordance of USGS vegetation analysis, the result is inputted into Deacon equation's illuminance index, and it is compared with actual measurement of wind speed to suggest recommendations for illumination index, and its rating classification methods which has to be applied to Deacon equation in domestic complicated area and costal area.
풍력용 동기발전기의 전기자 반작용을 이용한 전기 제동방식에 관한 연구
박귀열(Park Gui-Yeo),문채주(Moon Chae-Jo),정의헌(Cheang Eui-Heang),장영학,김의선(Kim Eui-Sun) 한국태양에너지학회 2010 한국태양에너지학회 논문집 Vol.30 No.4
The mechanical parts of small wind power generator less than 10 ㎾ are manufactured in the form of removing most of the accelerators. The braking system to protect blade from damages caused by high wind speed is manufactured in a manner having apparatus system(furling), manual brake or no brake. This study is on braking system in small size wind power generator, and carried out survey as following steps by applying electric braking system which uses armature reaction. We explained the principle of electric braking system and the principle of existing braking system. Also, this paper interpreted short circui tcurrent through open circuit and short circuit, as well as checking brake system's action using armature reaction with real construction of control device.