Banca de DEFESA: THALES AUGUSTO DE OLIVEIRA RAMOS

Uma banca de DEFESA de DOUTORADO foi cadastrada pelo programa.
DISCENTE : THALES AUGUSTO DE OLIVEIRA RAMOS
DATA : 29/11/2019
HORA: 09:30
LOCAL: A definir
TÍTULO:

An Efficient System of Electric Machines for Wind Power Generation driven by an Electromagnetic Frequency Regulator

PALAVRAS-CHAVES:

Wind Energy, Maximum Wind Power Extraction, Electromagnetic Frequency Regulator, Maximum Efficiency, Wind Turbine Topology, Wind Turbine Dynamics.

PÁGINAS: 150
GRANDE ÁREA: Engenharias
ÁREA: Engenharia Elétrica
SUBÁREA: Sistemas Elétricos de Potência
ESPECIALIDADE: Geração da Energia Elétrica
RESUMO:

A new topology has recently been developed to drive generators to enable hybridization of two power sources. Particularly, if one of these sources is wind power, it also serves the purpose of avoiding power electronic devices directly connected to the grid. The system consists of a squirrel cage rotor induction machine and a rotational armature with a three-phase winding that is powered by a secondary source. This new machine frame has been named the Electromagnetic Frequency Regulator (EFR). The objective established in a first research was to convert a variable speed imposed by the wind turbine to the armature, in a constant speed to be developed by the cage rotor, driving a synchronous generator shaft. A first objective of this Thesis was to mathematically model the topology and simulate it inserted in a large wind turbine. Then, it was proposed to use an induction generator instead of a synchronous generator, aiming to find the maximum extraction point of available wind power. From steady state analyzes, two possible control systems are proposed: a scalar control, which aims to obtain a desired speed for the system rotor, and a control that aims at the strategy of obtaining the maximum possible efficiency for the REF. Permanent regime simulations are performed in order to compare the two control systems presented. Thus, it is verified that the control by maximum efficiency strategy obtains better results when compared with the correspondents obtained from the scalar control. Dynamic simulations performed for the two proposed topologies show that both are viable and support variations in wind speed and disturbances in the power grid.

MEMBROS DA BANCA:
Presidente - 346287 - MANOEL FIRMINO DE MEDEIROS JUNIOR
Externo ao Programa - 346989 - JOSE TAVARES DE OLIVEIRA
Externo ao Programa - 347427 - RICARDO FERREIRA PINHEIRO
Externo à Instituição - JOÃO PAULO ABREU VIEIRA - UFPA
Externo à Instituição - PAULO VITOR SILVA - IFRN