• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2001년도 ICCAS
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• pp.65.2-65
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• 2001

There are not only lots of controllers such as UMC(Unit Master Controller), BMC(Boiler Master Controller), Fuel Flow controller, Air flow controller, Feed water flow controller, S/H R/H Temperature controller and so on, but also compensation controller such as BTU compensator, Fuel/Water ratio controller and O2 Co controller to take automatic control in the super critical once through boiler. It is important to make complete automation of boiler to use the compensation controller like BTU compensator. For example, In case of some boiler condition, operator has to change combustion parameter for changing the coal, on the contrary BTU compensator can calculate set value of the fuel flow and reset the fuel flow demand by itself. This paper shows us the logic and instruction regarding compensation controller of boiler that can be operated automatically.

• 전기전자학회논문지
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• 제26권3호
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• pp.349-354
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• 2022

화력발전소의 보일러 모델은 로직도 작성, 플랜트 튜닝, 제어이론 적용 등 다양한 분야에 사용된다. 특히 정확한 제어를 위해서는 정확한 모델이 필요하다. 수학적 모델은 화력발전소 시스템의 비선형성, 복잡성, 시변특성 등으로 인하여 시스템을 정확하게 표현하는데 한계가 있다. 이런 시스템에 대하여 신경망을 이용한 모델링 방법은 좋은 대안이 될 수 있다. 본 논문에서는 화력발전소 보일러의 증기계통을 신경망 알고리즘의 한 종류인 GRNN을 이용하여 모델링하였다. 보일러의 과열기와 재열기, 과열저감기, 드럼을 모델링하여 540[MW]급 화력발전소에서 취득한 데이터를 이용하여 학습하고 검증하였다. 검증결과 제안한 모델의 출력이 보일러의 실제 출력과 잘 일치함을 알 수 있었다.

• 한국산학기술학회논문지
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• 제21권4호
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• pp.9-19
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• 2020

본 연구에서는 정격 출력 375 MW급의 석탄화력발전소의 보일러 및 보일러를 지지하는 철골의 유한요소해석을 위한 보일러-철골 통합모델을 개발하였다. 본 연구는 SAP2000 프로그램을 사용하여 지진하중에 대하여 통합모델을 해석함으로써 차후에 보일러와 철골의 안전성을 평가할 것을 염두에 두고 수행한 선행 연구이다. 보일러 내부의 수많은 관으로 구성되는 복잡한 과열기, 재열기, 절탄기, 멤브레인벽에 대하여 단순화 기법을 사용하여 강성과 관성의 관점에서 등가인 보요소, 쉘요소, 솔리드요소로 모델링하는 방법을 제시하였다. 그리고 보일러와 철골 간의 연결을 위한 모델링 방법도 제시하였다. 보일러를 철골의 거더에 매다는 역할을 하는 많은 행거는 개수를 줄여서 등가 행거로 변환하여 모델링하였다. 보일러 외벽의 벅스테이에 부착된 보일러 스토퍼는 스토퍼와 철골 기둥 사이의 연결 관계를 고려하여 변위를 연계시켜 모델링하였다. 개발된 보일러-철골 통합모델에 대하여 자중조건에 대한 정적해석을 수행하여 변형형태를 평가하였다. 자중조건에 대한 해석결과, 철골 부재들과 보일러의 주요 구성품들의 거동이 타당한 것으로 나타났다. 결론적으로 본 연구에서 개발된 통합모델은 보일러 및 보일러를 지지하는 철골의 지진에 대한 안전성 평가에 충분히 활용이 가능한 것으로 판단된다.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1992년도 한국자동제어학술회의논문집(국내학술편); KOEX, Seoul; 19-21 Oct. 1992
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• pp.281-286
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• 1992

This paper describes a duplexed process control system for a boiler-turbine system of power plant, which is composed of supervisor, controller, and simulater subsystems. Its embeded POL(Problem oriented language) as a structured control language enables this system to do a real-time distributed control and fault diagnosis by simple programming with the actual implementation of advanced control algorithms such as PID autotuning and GPC, etc, the performance of overall system has been greatly enhanced.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1987년도 한국자동제어학술회의논문집; 한국과학기술대학, 충남; 16-17 Oct. 1987
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• pp.603-606
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• 1987

A simulator is designed in order to evaluate the performance a f a lockup controller. The original analog controller and boiler plant are transformed into digital form model, in which the plant is modeled as a 2 input-2 output system connected to first order peripheral units. The experimented results show that the simulated system renders the same steady state characteristics as data and show usability of simulator.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 1987년도 한국자동제어학술회의논문집; 한국과학기술대학, 충남; 16-17 Oct. 1987
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• pp.607-612
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• 1987

This study is concerned with the improvement of the Automatic Boiler Control and Turbine Governor system to maintain line - frequency within 60 .+-. 0.1 HZ. This describes the current problems of plant control system, the method and equipments to be developed for each plant based on the experimental test were carried out at field, and, lastly, the results of the study with the progress of it.

• 전기학회논문지
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• 제59권9호
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• pp.1663-1672
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• 2010

The boiler feed-water pump controllers which can be applied to 500MW class coal fired power plants was developed. The validity of the developed controllers was shown via the applied test result in a power plant. It is expected that the developed controllers are used to retrofit the existing controllers that have surpassed their expected service life and have limited spare parts, and contributes to the stable operation of plants. Based on the collected data and analysis, new control schemes were developed and implemented during the overhaul period in the new control systems. During normal operation, feed water could be supplied to the boiler with the capability of the 1600t/h flow without any problems in automatic mode of controllers. In this study, the feed-water pump controllers were developed successfully. In addition, it is expected that the developed controllers can make the plant operation more stable and can be applied to a lot of power plants.

• 제어로봇시스템학회:학술대회논문집
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• 제어로봇시스템학회 2003년도 ICCAS
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• pp.1449-1454
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• 2003

For many industrial processes there are good static models used for process design and steady state operation. By using system identification techniques, it is possible to obtain black-box models with reasonable complexity that describe the system well in specific operating conditions [1]. But black-box models using inductive modeling(IM) is not suitable for model based control because they are only valid for specific operating conditions. Thus we need to use deductive modeling(DM) for a wide operating range. Furthermore, deductive modeling is several merits: First, the model is possible to be modularized. Second, we can increase and decrease the model complexity. Finally, we are able to use model for plant design. Power plant must be able to operate well at dramatic load change and consider safety and efficiency. This paper proposes a simplified nonlinear model of an industrial boiler, one of component parts of a power plant, by DM method and applies optimal control to the model.

• 조명전기설비학회논문지
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• 제26권8호
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• pp.88-95
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• 2012

When controling combustion air flow in coal fired power plant the furnace safety must be considered first prior to plant efficiency. therefore it is very important to set air flow demand exactly for safe operation and maintenance. This paper analyze air flow control loop in power plant and introduce the method to improve dynamic response time. Simulation result shows this scheme is adoptable and provide better performance.

• 대한전기학회논문지:전력기술부문A
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• 제51권2호
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• pp.59-68
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• 2002

This Paper presents the dynmics modeling and the operation simulation of the 500 MW drum-type boiler and its control system hosted in the Boryung Power Plant unit #1 and #2. The fidelity of the modeling and the operation simulation is well verified by their agreement with the actual data obtained form the plant operation. As a plant signal generator for the various operation patterns and fault situations, the simulation environment will be utilized to develope the fault detecting signal processing algorithms.