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문채주,김용구,정환주,Moon, Chae-Joo,Kim, Yong-Gu,Chung, Hwan-Joo 한국조명전기설비학회 2004 조명·전기설비학회논문지 Vol.18 No.3
The bolier systems of coal fired power plants are large, non-linear systems with numerous interactions between its component parts. In the analysis of such complex systems, dynamic simulation is recognized as a powerful method of keeping track of the myriad of interactions. The boiler system consists of air/gas system and water/steam system. Due to recent reinforcement of environmental regulation on pollutant discharge and requirements of design validation on properites of boiler, the commercial programs are used for the analysis of boiler system. This paper addressed to the development of model using MMS(Modular Modeling System) developed by EPRI(Electric Power Research Institute) as the simulation tool. The developed model using MMS is tested for the design and local data on boiler combustion system of korea standard coal fired power plant boiler. The simulation results show that the developed model well reproduces responses of the combustion system with less than ${\pm}$5% error under steady state and transient state conditions. The developed model for analysis of the combustion system in this paper is general and applicable to any type of coal fired power plant. 석탄화력발전소의 보일러계통은 구성기기 사이에 수많은 상호관계를 갖는 대규모, 비선형 계통이다. 이러한 복잡한 계통의 해석에서 동특성 모의는 대규모 상호관계를 지속적으로 추적하는 강력한 방법으로 인식되고 있다. 보일러계통은 공기/가스 시스템과 물/증기 시스템으로 구성된다. 보일러의 오염물질 배출에 관한 최근 환경규제의 강화와 보일러의 물성치에 대한 설게 검증 요건 때문에 상업용 프로그램이 보일러 계통의 해석에 사용된다. 이 논문에서는 모의 도구로써 EPRI(미국전기연구소)에서 개발한 MMS를 사용하여 모델개발을 논의하였다. MMS에서 사용하여 개발된 모델은 한국표준석탄화력발전소의 보일러 연소계통에 대한 설계 및 현장데이터를 시험하였다. 개발된 모델은 정상상태 및 천이상태 조건에서 ${\pm}$5% 이내로 연소계통이 잘 응답하는 것으로 결과에서 보여준다. 이 논문에서 연소계통의 해석에 대한 개발된 모델은 일반적일고, 어떤 형식의 석탄호력발전소에도 적용이 가능하다.
원자력발전소 안전계통 소프트웨어의 동적시험에 관한 연구
문채주,장영학,이순성,서영,Moon, Chae-Joo,Chang, Young-Hak,Lee, Sun-Sung,Suh, Young 한국에너지학회 1999 에너지공학 Vol.8 No.2
In recently, the safety system software of the nuclear power plant has been verified and validated according to ANSI/IEEE-ANS-7-4.3.2-1982 to improve the reliability. This standard requires that safety-related software should be tested in the static and dynamic environments. In case of Inadequate Core Cooling Monitoring System (ICCMS), the static test procedure and related techniques are developed but the dynamic test procedure and related techniques are not developed. Therefore, this paper discusses the undeveloped techniques, and suggests the dynamic test procedure and the program for generation of test input data. The performance of the program was identified using accident analysis report of Ulchin 3&4 Final Safety Analysis Report (FSAR). 최근 원자력발전소의 안전계통 소프트웨어는 신뢰성을 향상시키기 위해 ANSI/IEEE-ANS-7-4.3.2-1982 기준에 따라 확인 및 검증이 이루어지고 있다. 이 규정은 안전관련 소프트웨어가 정적 및 동적 환경에서 시험되어야 한다고 요구하고 있다. 부적절노심냉각감시계통의 경우에 정적시험 절차 및 관련기술들은 개발되었으나 동적시험 절차 및 관련기술들은 개발되지 않았다. 따라서, 본 논문에서는 미개발된 기술들을 논의하고, 동적시험 절차와 시험 입력자료 생성 프로그램을 제안한다. 이 프로그램의 성능은 울진 3,4호기 최종 안전성 분석 보고서의 사고해석 결과를 사용하여 확인하였다.
문채주(Moon Chae-Joo),진종수(Jin Jong-Soo),서동춘(Seo Dong-Choon),정권성(Jung Kwen-Sung),김태곤(Kim Tae-Gon),김용구(Kim Young Gu) 한국태양에너지학회 2008 한국태양에너지학회 학술대회논문집 Vol.- No.-
To control the lead storage batteries it is necessary to consider the characteristics of each battery connected in series. In this study, the charging and discharging characteristics of sealed lead storage batteries 12V/1.2A was investigated one by one through experiments. The results of the experiment shows that one should consider the state of each battery to prevent overcharge or deep discharge. Also, we designed an equipment to measure battery voltages simultaneously using micro-controller. This equipment will be useful for monitoring batteries at PV generation system.
문채주(Moon Chae-Joo),김태곤(Kim Tae-Gon),장영학(Chang Young-Hag),김의선(Kim Eui-sun),임정민(Lim Jung-Min) 한국태양에너지학회 2009 한국태양에너지학회 논문집 Vol.29 No.2
Use of the PV(photovoltaic) generation system is increased in such areas as remote mountain places or islands at which electrical energy is not serviced. The stand alone PV system is required the power storage products such as battery, fly wheel and super capacitor. Several lead storage batteries are connected in series to get high voltages. The life of lead storage battery is shortened when over charge or over discharge takes place. So, it is needed to control batteries not to be overcharged or be discharged deeply. Voltage of each battery was ignored in former control methods in which overall voltage was used to control charge or discharge battery. In this study, the charging and discharging voltage variations of sealed lead storage batteries with 12V/1.2A were investigated step by step experiments. The results of the test, show that, one should consider and specify the state of each battery to prevent overcharge or deep discharge. With the basis of the experiments, we designed a monitoring unit to monitor battery voltages simultaneously using micro-controller. The unit measures voltage of 20 batteries simultaneously and displays data on the color LCD monitor with curved line graph. It also sends data to PC using the RS232C communication port. The designed unit was adapted to stand alone PV system with 1㎾ capacity and lead storage batteries are connected to the PV generation system. The number of lead storage batteries was 10 in series and 12V/250Ah each. Resistive load with 3㎾ was used for discharging.
2레벨용 부스트 컨버터를 이용한 소형풍력발전기 제동장치 설계에 관한 연구
문채주(Chae-JOO Moon),장영학(Young-Hak Chang),소순열(Soon-Youl So),박태식(Tae-Sik Park),정문선(Moon-Seon Jeong),윤영천(Young-Chan Youn) 대한전기학회 2013 전기학회논문지 Vol.62 No.10
The small wind generator with existing mechanical control system has a frequent failure and malfunction, and its maintenance is difficult. In this paper, an electric control method using a boost converter for small wind generator was suggested. The suggested 2-level boost converter control device was manufactured and its experimental operation were conducted on a wind generator with 200 [W] capacity. As a result of experimental device, the control by a boost converter was executed at the point that the output voltage of a wind generator became 36 [V] so it could be identified that the output voltage of a wind generator diminished and then it became 0 [V] after 5 [sec]. Besides, in case of applying the method suggested in this paper to a small wind power generation facility for street lights, it is expected to reduce its maintenance by preventing a frequent failure of a generator and to improve its utilization rate.
문채주(Chae-Joo Moon),장영학(Young-Hag Chang),소순열(Soon-Yeol So),김태곤(Tae-Gon Kim),김영곤(Young-Gon Kim),정문선(Moon-Seon Jeong),정승원(Seong-Won Jeong) 한국태양에너지학회 2013 한국태양에너지학회 논문집 Vol.33 No.2
It is evident that in the wind energy business as an economic activity there is a close relationship between the wind speed and the revenues. The wind turbine test facility for wind turbine accreditation is intended to be used by the industry for testing of both main components and systems. This paper suggest the wind test site for certification of prototype wind turbine with international regulations. The test site has an environmental permit for wind turbines with a maximum hub height of 120m and a rotor diameter up to 120m, and can accommodate prototypes with installed electrical powers up to 5MW each. A wind turbine manufacturer can lease the location for a period of type certification. And also researchers are the development of new methods for measuring the influence, performance and durability of the components, a mathematical and numerical modelling of component responses by using the site.
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),장영학(Young-Hak Chang),정문선(Moon-Seon Jeong),주효준(Hyo-Joon Joo),권오순(O-soon Kwon),곽대진(Dae-Jin Kwag),정권성(Gwon-Seong Jeong) 한국해양환경·에너지학회 2013 한국해양환경공학회 학술대회논문집 Vol.2013 No.11
해상기상탑은 해상풍황자원 및 해양환경데이터를 측정하고 있으며, 국내의 경우 해모수 1호기를 설치하여 서남해안의 풍황자원을 측정하고 있다. 본 논문에서는 한반도 남쪽방향으로 갈수록 풍황자원이 높다는 평가에 근거하여 신안군과 진도군 사이의 해역에 적용하고자 해상기상탑 Ocean MAST를 설계하여 설치하였다. The Offshore mast measures the resolution wind characteristic resource and Marine Environment data, And it sets up 1 expiration of Haemosu in the case of the interior of a country and measures the wind characteristic resource of the Southwest Coast. In this paper, in order to apply to the sea area between Sinan-gun and Jindo County based on the evaluation that the wind characteristic resource is high for the Korean south direction over the time, the Offshore mast Ocean MAST was designed and it set up.
문채주(Chae-Joo Moon),장영학(Young-Hak Chang),박태식(Tae-Sik Park),정문선(Moon-Seon Jeong),주효준(Hyo-Jun Joo),권오순(O-Soon Kwon),곽대진(Dae-Jin Kwag),정권성(Gwan-Seong Jeong) 한국태양에너지학회 2014 한국태양에너지학회 논문집 Vol.34 No.2
A meteorological(met) tower is the first structure installed during the planning stages of offshore wind farm. The purpose of this paper is to design the met tower with tripod bucket type support structure and to install the sensors. The support structure consist of a central steel shaft connected to three cylindrical steel suction buckets which is more cheaper than monopile or jacket type. And the remote wind condition sensors and marine monitoring equipment, including adcp, pressure type tide gauge, wave height sensors, and scour sensors, remote power supply are installed. The manufactured met tower constructed on sea area which is in front of Gasa island. All of functions of met tower showed normal operation conditions and the wind data got by remote data collection system successfully.