Navegando por Autor "MORAES, Anderson Roberto Barbosa de"

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Acesso aberto (Open Access)
Desenvolvimento e implementação de estratégias de controle digital para regulação de tensão e amortecimento de oscilações eletromecânicas em um gerador síncrono de 10kVA
(Universidade Federal do Pará, 2012-04-29) MORAES, Anderson Roberto Barbosa de; BARREIROS, José Augusto Lima; http://lattes.cnpq.br/1246564618922453; BARRA JUNIOR, Walter; http://lattes.cnpq.br/0492699174212608
This paper presents the development and implementation of control strategies for digital automatic voltage regulation and damping of oscillations in a 10kVA synchronous generator 10kVA located at the Power Systems Control Laboratory (LACSPOT) at Federal University of Pará (UFPA). The design of both controllers is based on the pole placement technique. For the design of the Automatic Voltage Regulator (AVR), it was adopted a first order simplified model for the synchronous machine, whose parameters were obtained experimentally. For the damping controller, also called Power System Stabilizer (PSS), it was used an auto-regressive with exogenous input (ARX) discrete model. This model was estimated by means of parametric identification techniques considering, for this purpose, the motor-generator connected to a larger system. The control laws were embedded in a high-performance microcontroller and, for the measurement of signals used in the controllers, an electronic instrumentation was developed which is based on operational amplifiers for the sensors signal conditioning. The control signal is based on the technique of pulse width modulation (PWM) and controls the average voltage of a DC-DC converter, which is used as an excitation circuit which energizes the field winding of the generator. Moreover, the electric drive of the machines that make up the 10kVA group generator was designed and automated by adding security to operators and components of this generation system. The experimental results demonstrate the good performance achieved by the proposed strategy.
Acesso aberto (Open Access)
Estabilizador de sistemas de potência digital aplicado a uma unidade geradora da UHE de Tucuruí
(2011-10) NOGUEIRA, Fabrício Gonzalez; BARRA JUNIOR, Walter; COSTA JÚNIOR, Carlos Tavares da; BARREIROS, José Augusto Lima; NASCIMENTO FILHO, Paulo Sergio; MORAES, Anderson Roberto Barbosa de; GOMES, Marcus Ciro Martins; LANA, Jânio José de
This paper presents the development and results of field tests of a digital power system stabilizer (PSS), designed for the damping of electromechanical oscillations in interconnected systems. Experimental tests were performed in a 350 MVA hydrogenerator unit, of the Tucurui Power Plant. The PSS damper control law was embedded in a digital hardware system based on a digital signal controller (DSPIC 30f5011). The structure of the control law is in discrete time RST canonical form, and the controller parameters were calculated using the pole shifting technique. For purposes of the controller design, the dynamics of the plant, in the considered operating point, was represented by a parametric model, which was estimated from data measured in the field. The experimental results showed an excellent performance of the damping of electromechanical modes observable UHE Tucurui by digital PSS.