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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.
장민영(Minyeong Jang),남정한(Junghan Nam),이세경(Sekyoung Lee),최종민(Jongmin Choi),육심균(Simkyun Yook) 대한전기학회 2010 정보 및 제어 심포지엄 논문집 Vol.2010 No.10
A Distributed Control System (DCS) is used in electrical power grids and electrical generation plants, environmental control systems, water management systems. oil refining plants and chemical plants. The system needs high reliability for monitoring and controlling distributed equipment. The fault-tolerant system has been presented to satisfy system reliability. The Fault-tolerant system is typically based on the concept of redundancy. Generally, the Triple Modular Redundancy (TMR) uses the voting mechanism. Thus. it needs voter modules. However, the single point of failure could be caused on the voter. For this reason, the voter must be composed as the redundancy for system reliability. This paper shows a new redundant structure of the voter. Voters are configured as a duplex redundancy. It offers easy repair and high reliability.
정해원(Haewon Jung),이용정(Yongjung Lee),최병희(Byunghee Choi),손현우(Hyunwoo Son),김성호(Sungho Kim),육심균(Simkyun Yook) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
Generally, the turbine control system of a power plant is a Duplex or TMR (Triple Modular Redundancy) platform, but no control platforms support all of the Single, Duplex and TMR control modes. The IMCS (Integrated Monitoring & Control system) platform of this paper is developed to support not only all of the Single, Duplex and TMR control modes but IEC 61131-3 standard as well, and includes user-defined function blocks for unique turbine control. The turbine control system based on the IMCS platform consists of four parts and the operator environment with HMI, each part is designed to improve availability and reliability - TMR control (TMR mode), common control (Duplex mode), turbine status monitoring (Duplex mode), and protection (TMR mode), and support functions for speed and load control, protection, power system synchronization, diagnostics, etc. In 2012, we will implement this system in the power plant after validation, verification, simulation, and test are performed.
김승민(Seungmin Kim),윤석문(Seokmoon Yoon),홍성진(Seongjin Hong),최준혁(Junehyug Choi),이주현(Joohyun Lee),육심균(Simkyun Yook) 대한기계학회 2010 대한기계학회 춘추학술대회 Vol.2010 No.11
Most control systems for boilers, turbines and generators, which are the main components of thermal power plants, consist of imported different types of platforms in South Korea. To improve the control efficiency and convenience of maintenance, an integrated monitoring and control system which is based on a single platform, has been developed in South Korea since 2007. The functional verification for the developed prototype product is an indispensable item in the development process, and it is one of the steps to make a brand new control system. In this paper, we introduce the key design specifications and functions of the integrated controller for controlling and monitoring boilers, turbines and generators. We also present the test results, procedures and methods of inspection for the prototype control system to meet the design specifications.