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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,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.
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),양시창(Si-Chang Yang),임정민(Jung-Min Lim),장영학(Young-Hak Chang),소순열(Soon-Yeol Soh),김의선(Eui-Sun Kim) 대한전기학회 2006 대한전기학회 학술대회 논문집 Vol.2006 No.7
The Photovoltaic(PV) generation system is a promising source of energy for the future. Since the need for renewable energy has been increased, the research of PV generation system has also been progressed. The main subject of this paper is about making the more useful real-time monitoring program to get and save the data from photovoltaic generation system of 30㎾ grid-connected. Therefore, it uses LabView for this real-time monitoring program.
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.
문채주(Moon Chae-Joo),곽승훈(Kwak Seung-Hun),장영학(Jang Yeong-Hak),김태곤(Kim Tae-Gon),김의선(Kim Eui-Sun),김태현(Kim Tae-Hyun) 한국태양에너지학회 2010 한국태양에너지학회 논문집 Vol.30 No.6
This study was conducted to estimate the relative performance of modules with changed characteristics due to long term exposure to the outdoor environment, with a specially made test device for simultaneous measurement of real time power output from the photovoltaic array, taking into account the inclined panel, direct irradiation, power being generated, temperature as well as the optimal analysis timing. In terminology description, M is an abbreviation of module and Group A, Group B are 10 modules series connection (1∼10 of M), (11∼20 of M) for each of them respectively. The overall mean voltage difference of M-18 with the lowest power output and M-14 with the highes toutput is -2.13V and it was identifiable that voltage difference was more concentrated to Group B. In addition, in case of M-2 and M -7, M-8, when compared with M-14, the overall mean voltage difference was -0.92V, -1.56 and -0.91V respectively showing the more concentration to Group A. When the temperature of module went up by 1℃, the mean voltage was reduced by 0.35V. For current, Group A was lower than Group B by-0.022A and the ratio of each group was 49.68% and 50.32% respectively, presumably the module with deteriorated properties were more concentrated to Group A relatively. From the comparison of relations with the comprehensive accumulation, M-2, M-7, M-8, M-16 and M-18 were those with deterioration of performance to the worst, there by requiring precision examination. In comparative efficiency, M-14 was the most excellent one as 12.19% while M-18 as 10.53% was identified that its efficiency was comparatively rapidly reduced.
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.