• 대한전기학회:학술대회논문집
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• 대한전기학회 2001년도 하계학술대회 논문집 A
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• pp.140-142
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• 2001

Three single loop fuzzy logic controllers are designed independently for the control of boiler system of fossil-power plant. The control rules and the membership functions of proposed fuzzy logic control system are generated automatically without using plant model. The simulation shows successful results for wide range operation of boiler system of fossil-power plant.

• 대한전자공학회:학술대회논문집
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• 대한전자공학회 2000년도 하계종합학술대회 논문집(1)
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• pp.85-88
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• 2000

Distributed Control System(DCS) is one of the best solutions to implement control systems because it provides continuous observation of control process and execution of commands to induce proper operations. In this paper, a design of control network for DCS in nuclear power plant is proposed. The proposed control network on DCS has a simple architecture and deterministic property. Thus, the proposed control network offers hard real-time periodic service. It also has redundant media for the fault-tolerance. As a result, high safety and reliability required in nuclear power plant are guaranteed.

• 조명전기설비학회논문지
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• 제23권12호
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• pp.154-161
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• 2009

연료전지 발전 시스템은 비선형성을 내포한 다수의 제어 루로들로 구성된 매우 복잡한 형태의 시스템이다. 연료전지 발전 시스템의 제어를 위하여 연료전지의 스텍 모델이 개발되고 있으며 연료전지 발전 시스템의 간략화된 프로세스 흐름도도 제시되고 있다. 본 연구에서는 이러한 모델을 사용하여 연료전지 발전 시스템을 지능적으로 제어할 수 있는 I-SRG(Intelligent Setpoint Reference Governor)를 개발한다. I-SRG는 시스템의 제약조건과 성능목표에 대한 최적의 운전 설정치를 산출하고 각 제어 루프의 앞먹임 제어입력을 생성한다. I-SRG는 PSO(Particle Swarm Optimization) 알고리즘을 최적화 기법에 사용하고 신경회로망으로 구현되어진다. MCFC 발전 시스템의 전력 프로파일에 대한 추종 제어의 모의실험을 수행하여 제안된 I-SRG의 유용성을 보인다.

• 대한전기학회논문지
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• 제40권1호
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• pp.10-17
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• 1991

An improved control method in turbine control system is proposed. By automatic follow-up design, power system frequency may be maintained within prespecified range. Base or half load control is possible by distributing power plant load allotment. Otherwise, diminutive frequency-load control is dine by governor-free operation in power plant. This paper proposes governor-free operation which is automatically followed by load-limitter setter. The condition which limits governor action may be somewhat improved within boiler condition by this idea. This design has been implemented at Samchunpo thermal power plant. The improved practical results are shown.

• 전자공학회논문지SC
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• 제48권4호
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• pp.25-32
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• 2011

국내 전력의 수요증가로 인해 전력산업에서 신경망 역할을 하는 I&C(Instrumentation & Control)의 중요성이 날로 증가하고 있으며, 외국 선진 제작사의 기술 보호로 제어 시스템의 국산화가 요구되고 있는 상황이다. 이러한 상황에서 500MW급 초임계압 표준 석탄화력 발전소에의 실증 적용을 목표로 국산 통합 감시 제어시스템 개발 연구가 진행되고 있다. 개발하는 통합 감시 제어시스템은 발전설비의 중요성으로 인해 개발과정이나 개발 후 발전 설비에 적용되기 전에 시스템의 기능 및 신뢰성 등의 검증이 요구되고 있다. 또한 전력수요의 증가로 인해 제어시스템 설치 및 시운전 기간의 충분한 확보가 어려운 시점에서, 향후 실증 적용시 시행착오를 줄이기 위해 제어 시스템의 검증은 필수적이다. 본 논문에서는 개발한 제어 시스템의 기본 스테이션에 대해 기능 검증한 사례를 소개한다.

• 대한전기학회:학술대회논문집
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• 대한전기학회 1999년도 하계학술대회 논문집 B
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• pp.734-736
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• 1999

The electricity demand has been in the trend of increase for the past 30 years except last year due to economic crisis. The central electrical power dispatch center anticipates each and every hour's electricity demand and dispatch every power plant's output(MW) taking into account of the costs, frequency regulation abilities, locations, reliabilities and so on. to meet the demand as quickly as possible. The large portion of the power plants' output is contolled automatically by the AGC(Automatic Generation Control) function which is a part of the EMS(Energy Manage System) computer in the dispatch center. To receive the electrical power dispatch signal from the EMS, a power plant should have a remote MW control feature in the turbine control system or unit master control system. We investigated the AGC function and a power plant's remote MW control configuration.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2008년도 제39회 하계학술대회
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• pp.1817-1818
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• 2008

Even though efficiency of coal-fired power plant is proportional to operating temperature, increasement of operating temperature is limited by a technological level of each power plant components. It is an alternative plan to increase operating pressure up to ultra super critical point for efficiency enhancement. It is difficult to control in that pressure within safety guideline that many unexpected phenomena are happen because that region is highly nonlinear region. In this paper, Advanced process control algorithm, ARX and Fuzzifier, is introduced. Then power plant control logics applied Unit Step Optimizer, which is combination of ARX and Fuzzifier are proposed. Its performance is tested and analyzed with design guide line.

• 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.

• 대한전기학회:학술대회논문집
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• 대한전기학회 2009년도 제40회 하계학술대회
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• pp.1662_1663
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• 2009

There are generator/turbine/boiler control system in the thermal power plant. By the way, the manufacturers are different each other in many cases. Therefore there were many difficulties in interface and maintenance of power plant. So, we have been developing the integration of all control system in a single manufacturer. Mill & burner control is analyzed in this paper.