Development of a PID-Fuzzy controller in the water level control of a pressurizer of a nuclear reactor

Thiago Souza Pereira de Brito; Carlos Alberto Brayner de Oliveira Lira; Wagner Eustáquio de Vasconcelos

doi:10.15392/bjrs.v8i3B.726

Autores

Thiago Souza Pereira de Brito Universidade Federal de Pernambuco -UFPE Centro de Tecnologia e Geociências - CTG Departamento de Energia Nuclear - DEN Cidade Universitária, 50740-540, Recife, PE, Brazil ,
Carlos Alberto Brayner de Oliveira Lira Universidade Federal de Pernambuco -UFPE Centro de Tecnologia e Geociências - CTG Departamento de Energia Nuclear - DEN Cidade Universitária, 50740-540, Recife, PE, Brazil
Wagner Eustáquio de Vasconcelos Universidade Católica de Pernambuco Centro de Ciências e Tecnologia – CCT Santo Amaro, 50050-900, Recife, PE, Brazil

DOI:

https://doi.org/10.15392/bjrs.v8i3B.726

Palavras-chave:

control, fuzzy, pressurizer, reactor

Resumo

It is well known that safety in the operation of nuclear power plants is a primary requirement because a failure of this system can result in serious problems to the environment. A nuclear reactor has several systems that help keep it in normal operation, within safety margins. Many of these systems operate in the control of variable quantities in the primary circuit of a reactor. However, nuclear reactors are nonlinear physical systems, and this introduces a complexity in the control strategies. Among several mechanisms in the thermal-hydraulic system of a reactor that actuate as a controller, the pressurizer is the component responsible for absorbing pressure variations that occur in the primary circuit. This work aims at the development of a PID controller (Proportional Integral Derivative) based on fuzzy logic to operate in a pressurizer of a nuclear Pressurized Water Reactor. A Fuzzy Controller was developed using the process of fuzzification, inference, and defuzzification of the variables of interest to a pressurizer, then this controller was coupled to a PID Controller building a PID Controller, but oriented by Fuzzy logic. Subsequently, the PID-Fuzzy Controller was experimentally validated in a Simulation Plant in which transients like those in a PWR were conducted. The PID parameters were analyzed and adjusted for better responses and results. The results of the validation were also compared to simple controllers (on / off).

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Biografia do Autor

Thiago Souza Pereira de Brito, Universidade Federal de Pernambuco -UFPE Centro de Tecnologia e Geociências - CTG Departamento de Energia Nuclear - DEN Cidade Universitária, 50740-540, Recife, PE, Brazil,

Doutorando no Progama de Pós-Graduação em Tecnologias Energéticas e Nucleares
Universidade Federal de Pernambuco -UFPE
Departamento de Energia Nuclear - DEN
Centro de Tecnologia e Geociências - CTG
Cidade Universitária, 50740-540, Recife, PE, Brazil
Carlos Alberto Brayner de Oliveira Lira, Universidade Federal de Pernambuco -UFPE Centro de Tecnologia e Geociências - CTG Departamento de Energia Nuclear - DEN Cidade Universitária, 50740-540, Recife, PE, Brazil

Professor Titular no Progama de Pós-Graduação em Tecnologias Energéticas e Nucleares
Universidade Federal de Pernambuco -UFPE
Departamento de Energia Nuclear - DEN
Centro de Tecnologia e Geociências - CTG
Cidade Universitária, 50740-540, Recife, PE, Brazil
Wagner Eustáquio de Vasconcelos, Universidade Católica de Pernambuco Centro de Ciências e Tecnologia – CCT Santo Amaro, 50050-900, Recife, PE, Brazil

Professor assitente II no Curso de Engenharia Química da Universidade Católica de Pernambuco.

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