Journal of the Korean Society of Systems Engineering (시스템엔지니어링학술지)

The Korean Society of Systems Engineering (한국시스템엔지니어링학회)
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A Systematic Engineering Approach to Design the Controller of the Advanced Power Reactor 1400 Feedwater Control System using a Genetic Algorithm

  • Received : 2018.11.09
  • Accepted : 2018.12.27
  • Published : 2018.12.31
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Abstract

This paper represents a systematic approach aimed at improving the performance of the proportional integral (PI) controller for the Advanced Power Reactor (APR) 1400 Feedwater Control System (FWCS). When the performance of the PI controller offers superior control and enhanced robustness, the steam generator (SG) level is properly controlled. This leads to the safe operation and increased the availability of the nuclear power plant. In this paper, a systems engineering approach is used in order to design a novel PI controller for the FWCS. In the reverse engineering stage, the existing FWCS configuration, especially the characteristics of the feedwater controller as well as the feedwater flow path to each SG from the FWCS, were reviewed and analysed. The overall block diagram of the FWCS and the SG was also developed in the reverse engineering process. In the re-engineering stage, the actual design of the feedwater PI controller was carried out using a genetic algorithm (GA). Lastly, in the validation and verification phase, the existing PI controller and the PI controller designed using GA method were simulated in Simulink/Matlab. From the simulation results, the GA-PI controller was found to exhibit greater stability than the current controller of the FWCS.

Keywords

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[Figure 1] System development process

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[Figure 2] Non-safety control systems of APR 1400

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[Figure 3] Block diagram of the feedwater control

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[Figure 4] Overall scheme of the FWCS for output tracking

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[Figure 5] Directions of Multi Crossover Chromosomes

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[Figure 6] Feedback control system based on genetic PI Controller

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[Figure 7] Overall block diagram

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[Figure 8] Step response of the closed-loop system for the GA-PI

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[Figure 9] Comparison of the step responses of the closed-loop system for the GA-PI and the existing PI controllers

References

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