Modelo em malha fechada para o gerador de indução duplamente alimentado baseado em controladores proporcional e integral

Resumo -O modelo matemático clássico do gerador de indução duplamente alimentado não considera as perdas no núcleo magnético e suplementares. Porém, ele é válido quando o gerador entrega sua potência nominal, o que não ocorre no processo de sincronização, onde o gerador está a vazio. Em geral, os modelos que consideram essas perdas tornam o equacionamento mais complexo. Neste sentido, este artigo propõe que se considerem estas perdas como agrupadas na resistência do rotor, o que mantém as equações da máquina inalteradas. Ainda, apresenta-se um mé-todo simplificado para a estimação dos parâmetros do circuito do rotor, os quais são utilizados para sintonizar os controladores de corrente durante o processo de sincronização à rede elétrica. Os resultados de simulação e experimentais confirmam a eficácia da abordagem proposta.Palavras-Chave -Estimação de Parâmetros, Gerador de Indução Duplamente Alimentado, Sincronização. PARAMETER ESTIMATION AND CONTROL OF A DOUBLY-FED INDUCTION GENERATOR DURING THE SYNCHRONIZATION WITH THE GRIDAbstract -The conventional mathematical model of the doubly-fed induction generator does not take into account the magnetic core and the stray load losses. However, this model is valid when the generator delivers its rated power, which does not occur during the synchronization process, as it is a no-load situation. In general, the models that consider these losses make the equations more complex. Thus, this paper proposes to consider these losses as grouped in the rotor resistance, which keeps unchanged the machine equations. In addition, a simplified method is presented for estimation of rotor circuit parameters, which are used to tune the current controllers during the process of synchronization with the grid. The simulation and experimental results confirm the effectiveness of the proposed approach.

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Wind Energy Conversion System Based on DFIG with Three-Phase Series Grid Side Converter and Single DC-Link

Oliveira¹,

Jacobina²,

Rocha³

2021

Eletrônica de Potência

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In this paper, a wind energy conversion system based on doubly-fed induction generator with an additional series grid side converter without transformer is proposed. Stator voltages may be compensated by series grid side converter under distorted and unbalanced grid voltage sags, thus avoiding over-current in the rotor, overvoltage in the dc-link, double-frequency oscillations in the electromagnetic torque, and rotor over-speed. Moreover, the control strategy of the proposed system allows reactive power to be injected during voltage sags. Simulation and experimental results are presented to evaluate the proposed system.

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Modelo em malha fechada para o gerador de indução duplamente alimentado baseado em controladores proporcional e integral

Cited by 3 publications

References 32 publications

Reduced-order modeling approach for wind energy conversion systems based on the doubly-fed induction generator

Reduced-order modeling approach for wind energy conversion systems based on the doubly-fed induction generator

Estimação de Parâmetros e Controle de um Gerador de Indução Duplamente Alimentado Durante a Sincronização com a Rede Elétrica

Wind Energy Conversion System Based on DFIG with Three-Phase Series Grid Side Converter and Single DC-Link

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