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Title: Investigação experimental de estratégias de identificação e controle LPV aplicadas ao amortecimento de oscilações eletromecânicas em sistemas elétricos de potência
metadata.dc.creator: NOGUEIRA, Fabrício Gonzalez
metadata.dc.contributor.advisor1: BARRA JUNIOR, Walter
Keywords: Amazônia brasileira
Estabilizador de sistema elétrico de potência
Controle LPV
Vibração eletromecânica
Usina Hidrelétrica de Tucuruí - PA
Tucuruí - PA
Pará - Estado
Issue Date: 29-Jun-2012
Publisher: Universidade Federal do Pará
Citation: NOGUEIRA, Fabrício Gonzalez. Investigação experimental de estratégias de identificação e controle LPV aplicadas ao amortecimento de oscilações eletromecânicas em sistemas elétricos de potência. 2012. 203 f. Tese (Doutorado) - Universidade Federal do Pará, Instituto de Tecnologia, Belém, 2012. Programa de Pós-Graduação em Engenharia Elétrica.
Abstract: In this thesis is performed an experimental investigation of the performance of a LPV (linear parameter varying) control strategy applied to damp electromechanical oscillations in electric power systems. The study was performed in a 10kVA electric power system, which is configured as a single machine connected to an infinite bus. Furthermore, were also performed field tests on a generating unit of Tucurui Hydroelectric Power Plant. Firstly, a set of routines for the analysis and synthesis of LPV damping controllers were developed and tested computationally, along with routines for the identification of LPV models of the plant. The coefficients of the LPV damping controller, in this case a power system stabilizer (PSS), depends on the value of a variable representative of the system operating condition (scheduling parameter), which in this study, were the terminal active power (P) and reactive power (Q) of the generating unit. For control ends, the dynamics of the plant was represented by an ARX LPV model, which was estimated from experimental data collected in the plant for a wide range of operating conditions. From the LPV model of the plant, the values of the parameters of the LPV controller were determined via an optimization problem, in the form of a parameterized LMI (PLMI). The solution of PLMI is obtained from a relaxation via sum-of-squares decomposition. The LPV PSS was designed to ensure stability and performance for a wide range of operating conditions of the plant, which is generally not possible to obtain with conventional fixed parameter controllers. The LPV PSS control law was implemented in an embedded system based on a digital signal controller. The experimental results showed an excellent performance of the LPV PSS on the damping of the electromechanical oscillations both in the 10kVA electric microgenerator system, and in the Tucurui generating unit.
Appears in Collections:Teses em Engenharia Elétrica (Doutorado) - PPGEE/ITEC

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