• Proceedings of the KIEE Conference
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• 1998.11b
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• pp.609-611
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• 1998

In this paper, a method for the efficient implementation of the control network for a distributed control system (DCS) is proposed. The proposed method focuses on the real-time property and the low networking cost of a control network. It suggests a new network architecture combining the IEEE 802.4 token-passing bus access method and the IEEE 802.3 physical layer. For this purpose, a new interface, a physical layer service translator is introduced. A control network using this method is implemented and applied to a DCS.

• Proceedings of the KIEE Conference
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• 2002.07d
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• pp.2292-2294
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• 2002

This paper presents the network of Distributed Control System(DCS) considering specification of nuclear power plant. The network is composed of field network, control network and information network. The protocol of control network is ring type and it is compared to ethernet type. This paper proposes the structure of DCS, the protocol of each network and analyzes the network traffic along data capacity of field network, control network, information network and the network performance. Network II.5 is used as traffic simulation tool.

• Journal of the Korean Institute of Telematics and Electronics A
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• v.31A no.10
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• pp.21-30
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• 1994

We discussed the Distributed Control System's design on preface and analyzed time of the real-time communication by using designed system. The DCS proposed in this thesis was implemented to network file system having recovery advantage and shared memory method to access file system of a Remote Station with ease. Also, this system minimized the network delay-time by using the real-time VME147 board. In implemented DCS, the performance analysis of real-time process of a Remote Station was done to get the total time for reak-tune communication from a Remote Station to the Central Station after terminating of process. For the analysis of system performance, we experiented by three steps. Firstly, we measuredthe processing the of LOOP function that real-time CPU convertes to-2,500~10.000 values from the input data of the Analog Interface Card. Secondly, we measured the processing time of the LOGIC function and the LOOP function. Lastly, we measured total processing time for communication from a Remote Station to the Centrol Station.

• Proceedings of the Korea Society for Simulation Conference
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• 2003.11a
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• pp.159-164
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• 2003

DCS (Distributed Control System) is adapted in the most fossil power plant in our country but that is not true in the nuclear power plant (NPP) because of the safety problem. KEPRI has developed many simulators for the training of the operators working in power plants. With this accumulated high technology we are developing a DCS simulator for the performance verification of the developed DCS for the make-up demin-water treatment system of Kori #3&4. In this paper we explain how we develop the system model and show a simulation result.

• Nuclear industry
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• v.27 no.2 s.288
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• pp.57-64
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• 2007

• Journal of IKEEE
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• v.3 no.1 s.4
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• pp.57-68
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• 1999

DCS require a remote supervisory control that applies a various applications with a period of integrated EIC(electric instrument control) using distributed computer network. Until now, DCS has leaved something to be desired in guaranteeing real-time required in remote site plant. In this paper, each controller is designed by implementing the controller suiting with an wide area to enhance the hardware of existing PRS controller and GWS, RPS and SRS, for the efficiency of TM/TC system, Therefore, real-time emphasizes on the communication processing time, rate of system load analyzed and validity was evaluated for a each implemented controllers.

• Proceedings of the Korean Nuclear Society Conference
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• 1998.05a
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• pp.335-340
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• 1998

In this paper a prototype of Requirement Tracking and Verification System(RTVS) for a Distributed Control System was implemented and tested. The RTVS is a software design and verification tool. The main functions required by the RTVS are managing, tracking and verification of the software requirements listed in the documentation of the DCS. The analysis of DCS software design procedures and inter(aces with documents were performed to define the user of the RTVS, and the design requirements for RTVS were developed.

• Proceedings of the KIEE Conference
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• 1995.11a
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• pp.219-221
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• 1995

This paper proposes a model for simulation and performance evaluation of distributed computer systems(DCS). The model is composed of operating system(OS), resource, task, environment submodel. Task Flow Graph(TFG) is suggested to describe the relation between tasks. This paper considers task response time, the scheduler's ready queue length, utilization of each resource as performance indices. The distributed system of Continuous Annealing Line(CAL) in iron process is simulated with the proposed model.

• Proceedings of the KIEE Conference
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• 1997.07b
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• pp.651-653
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• 1997

전력사업에 있어 그 기본이 되는 발전소는 현재 복잡화되어 가고 있는 산업사회의 전력수요에 대한 대폭적인 증가 추세에 따라 발전소에서는 보다 효율적이며 합리적이고 경제적인 전력공급을 위해 전력생산에 대한 신뢰성 향상 및 안정성 확보는 물론, 효율성이 높은 운전이 요구되고 있다. 본 논문에서는 상호간섭이 많은 다변수 비선형 시스템인 발전소를 제어하기 위해 적용된 선진국들의 분산제어시스템(DCS, Distributed Control System)의 구조를 분석하고 향후 발전소용 DCS의 기술동향 및 선택을 위해 고려될 사항들을 알아보고자 한다.

• 제어로봇시스템학회:학술대회논문집
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• 2005.06a
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• pp.334-337
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• 2005

This paper describes the implementation of DCS communication network that provides high bandwidth and reliability. The network for DCS in this paper adopts the Reflective Memory (RM) architecture and Fast Ethernet physical media that have 100Mbps bandwidth. Also, this network uses Ring Enhancement Device (RED) which was invented to reduce the time delay of each node. The DCS network that is introduced in this paper is named as ERCNet(Ethernet based Real-time Control Network). This paper describes the architecture and working algorithms of ERCNet and performs numerical analysis. In addition, the performance of ERCNet is evaluated by experiment using the developed ERCNet network.