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보일러 최적운전을 위한 Soot Blower 운전에 관한 연구
육심균(Simkyun Yook),김성호(Sungho Kim),정해원(Haewon Jung),조창호(Changho Cho) 대한기계학회 2003 대한기계학회 춘추학술대회 Vol.2003 No.11
In a coal-fired boiler, deposited slag and foul from combustion of coal pose a serious problem in heat transfer between water walls and tube bundles, after all, it reduce boiler efficiency and cause unstable load change. Old fashioned operation of soot blower to remove the accumulated ash without considering efficiency of boiler cause excessive consumption of steam and additional auxiliary power energy for sootblowing. In this study, we developed optimal soot blowing system and applied it to utility and then compared the result of optimized operation with that of old fashioned operation of soot blower.
화력발전용 통합감시제어시스템의 이더넷 통신 설계 : IMCS의 CNet 개발
박유경(YouKyung Park),강승엽(SeungYup Kang),윤석문(Seokmoon Yoon),육심균(SimKyun Yook) 대한전기학회 2010 정보 및 제어 심포지엄 논문집 Vol.2010 No.10
화력발전용 통합감시제어시스템(Integrated Monitoring and Control System for Thermal Power Plant, 이하 IMCS)의 제어기와 상위 운영자환경시스템(Operator Interface System, 이하 OIS) 간의 데이터 통신에는 이더넷 통신이 사용되고 이를 Control Network, 이하 CNet이라 지칭한다. CNet은 제어기에서 생성/ 수집된 정보를 상위 OIS로 전송하거나 OIS로부터 제어 명령을 전송받아 이를 제어기 내부로 전달하는 역할을 하는, IMCS의 중요 모듈 중의 하나이다. IMCS의 CNet은 OIS의 부하를 최소화하고 제어기로부터 생성되는 모든 정보를 정보의 누락이나 오류 없이 저장하였다가 OIS로 진송하고 OIS로부터의 제어 명령을 수신하는 즉시 처리하여 데이터의 무결성을 확보한다. 원형 버퍼의 효율적인 사용으로 최소한의 메모리를 사용함과 동시에 여러 개의 데이터 서버에 대용할 수 있도록 설계되었으며 개설되어 있는 통신 연결 상태를 계속해서 감시하여 이상 감지 시 즉시 처리하는 기능을 포함하고 있다. 각각의 CPU 보드에 내장되는 시스템 펌웨어에 포함되는 CNet은 CPU 보드의 절체 시에도 정보의 누락이나 데이터 서버의 부하 증대 없이 정보를 전달할 수 있도록 설계되었다.
Delta-operator-based adaptive MPC for an MCFC system
June Ho Cho,Huiyong Kim,Kwang Soon Lee,Simkyun Yook,Wonhee Jung 제어로봇시스템학회 2011 제어로봇시스템학회 국제학술대회 논문집 Vol.2011 No.10
A delta-operator-based adaptive model predictive control (AMPC) technique has been proposed for stack temperature control of a molten carbonate fuel cell (MCFC) system. The MCFC system is unique in that the system should be kept as stable as possible to avoid potential electrode damage, which renders the identification experiment difficult; many stack variables should be monitored at a high frequency and constrained for safe and energy-efficient operation over a long period of time. To accommodate such characteristics, an MCFC simulator was developed and delta-operator-based adaptive MPC was devised and applied to the numerical MCFC system. The model for controller design was derived from the MCFC simulator. To cope with the model error from the true system, a small number of tunable parameters were introduced so that they can be adjusted on-line during the operation of the system. The performance of the proposed technique was investigated numerically.
Development of Excitation Control Process in IMCS
Byunghee Choi,Sungho Kim,Haewon Jung,Yongjung Lee,Hyunwoo Son,Simkyun Yook 제어로봇시스템학회 2010 제어로봇시스템학회 국제학술대회 논문집 Vol.2010 No.10
The main components of fossil power plant such as boiler, turbine, and generator are independently managed by separated control systems which have totally different platforms. However, recently, many fossil power plants request Integrated Monitoring and Control System (IMCS) which has standardized single platform and control system by reason of effective management. This paper presents the development of control program in such environment. This paper focuses especially on excitation control system in generator which suffers big change in expression method of control process.
A Fuel Cell Simulator for Control Logic Verification and Operator Training
맹좌영(Maeng, Jwayoung),김성호(Kim, Sungho),정원희(Jung, Wonhee),강승엽(Kang, Seungyup),홍석규(Hong, Sukkyu),이세경(Lee, Sekyoung),육심균(Yook, Simkyun) 한국신재생에너지학회 2010 한국신재생에너지학회 학술대회논문집 Vol.2010 No.11
This research presents a fuel cell simulator for control logic verification and operator training. Nowadays, power industries are focusing on clean energy as a response to new policy. The fuel cell can be the solution for clean energy, but operating technology is not well developed compared to other conventional power plans because of its short history. Therefore we need a simulator to verify the new control strategy and train operators, because the price of a real fuel cell system is too high and mechanically weak to be used for these kind of purposes. To develop the simulator, a 300 KW MCFC(Molten Carbonate Fuel Cell) system was modeled with stack, BOPs(pre-reformer, steam generator, etc) and mechanical components(valves, pipes, pumps, blowers, etc). The process model was integrated to emulated control system and HMI(Human Machine Interface). A static load and open loop tests were conducted for verifying the accuracy of the process model, since it is the most important part in the simulation. After verifying the process model, an automatic load change and start-up tests were conducted to verify the performance of a new control strategy(logic and functional loops).