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Multi-region fuzzy logic controller with local PID controllers for U-tube steam generator in nuclear power plant

Abstract

In the paper, analysis of multi-region fuzzy logic controller with local PID controllers for steam generator of pressurized water reactor (PWR) working in wide range of thermal power changes is presented. The U-tube steam generator has a nonlinear dynamics depending on thermal power transferred from coolant of the primary loop of the PWR plant. Control of water level in the steam generator conducted by a traditional PID controller which is designed for nominal power level of the nuclear reactor operates insufficiently well in wide range of operational conditions, especially at the low thermal power level. Thus the steam generator is often controlled manually by operators. Incorrect water level in the steam generator may lead to accidental shutdown of the nuclear reactor and consequently financial losses. In the paper a comparison of proposed multi region fuzzy logic controller and traditional PID controllers designed only for nominal condition is presented. The gains of the local PID controllers have been derived by solving appropriate optimization tasks with the cost function in a form of integrated squared error (ISE) criterion. In both cases, a model of steam generator which is readily available in literature was used for control algorithms synthesis purposes. The proposed multi-region fuzzy logic controller and traditional PID controller were subjected to broad-based simulation tests in rapid prototyping software – Matlab/Simulink. These tests proved the advantage of multi-region fuzzy logic controller with local PID controllers over its traditional counterpart.

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Accepted or Published Version
DOI:
Digital Object Identifier (open in new tab) 10.1515/acsc-2015-0028
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Creative Commons: CC-BY-NC-ND open in new tab

Keywords

Details

Category:
Articles
Type:
artykuły w czasopismach recenzowanych i innych wydawnictwach ciągłych
Published in:
Archives of Control Sciences no. 25, pages 429 - 444,
ISSN: 1230-2384
Language:
English
Publication year:
2015
Bibliographic description:
Puchalski B., Duzinkiewicz K., Rutkowski T. A.: Multi-region fuzzy logic controller with local PID controllers for U-tube steam generator in nuclear power plant// Archives of Control Sciences. -Vol. 25., iss. 4 (2015), s.429-444
DOI:
Digital Object Identifier (open in new tab) 10.1515/acsc-2015-0028
Verified by:
Gdańsk University of Technology

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