Navegando por Assunto "Bancada experimental"

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Acesso aberto (Open Access)
Bancada experimental para ensaios em geradores elétricos utilizados em aerogeradores de pequeno porte
(Universidade Federal do Pará, 2012-04-26) AZEVEDO, Thiago Paula Silva de; GALHARDO, Marcos André Barros; http://lattes.cnpq.br/6672470707462259; PINHO, João Tavares; http://lattes.cnpq.br/0847897516772421
This dissertation presents a test setup for electrical generators used in small wind turbines. The system is basically composed by an induction motor, which simulates a wind rotor, mechanically coupled to the electrical generator under test; a frequency inverter, used to change the motor speed; transducers of electrical parameters, for the measurement of the parameters of interest (instantaneous voltage and current) at the generator output; an angular velocity sensor for measuring the rotation of the motor shaft; a microcomputer, for monitoring and storing the measured parameters, and control the frequency inverter, through a software developed; a data acquisition board, which serves as the interface between the transducers/sensor and the microcomputer. The angular speed supplied to the generator can be varied according to the given wind speeds values, which are associated with corresponding values of rotation, in order to simulate the behavior of a wind rotor. Thus, it is possible to trace the power curve (power versus wind speed) of the tested generator and analyze its performance. Also presented in this work are the results of measurements made, using the developed setup of a small commercial generator (1 kW) and other developed in a research project, both axial flux permanent magnet machines.
Acesso aberto (Open Access)
Emulação de carga para geração de energia elétrica usando inversor
(Universidade Federal do Pará, 2022-06-30) LOPES, Marcos Andrey da Silva; VIEIRA JÚNIOR, Petrônio; http://lattes.cnpq.br/1958791286192330
This paper aims to emulate variable load on a simulation bench for wind and hydraulic generation using an inverter connected to a fixed load consisting of a bank of resistances and inductances. From the modeling performed on the hydraulic and wind turbines, it is possible to reproduce the effects caused by variations in the dynamics of each generation, such as the variation in wind, for wind, or the flow of water in a distributor, for hydraulic . The generation simulation bench is composed of a separate excitation machine (DC motor), simulating the primary source, driven by a converter, which is coupled to a generator, this one feeding the inverter, which is responsible for the interface with the load. From this coupling of the motor-generator set, it is possible, through the inverter, to carry out the load variation, in order to simulate different load conditions in the generation. The inverter is used as a load variation strategy for dynamic response studies of simulated generation systems, voltage and frequency regulation, harmonic analysis in the system, among many situations. Through this set, it was possible to vary the generator armature current by properly configuring the inverter parameters. To complete the study, the look at table method is proposed for the proper selection of inverter parameters for load variation.