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Master's Dissertation
DOI
10.11606/D.3.2016.tde-30122014-112624
Document
Author
Full name
Rafael Ricardo Avila Naranjo
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Paulo, 2014
Supervisor
Committee
Salles, Maurício Barbosa de Camargo (President)
Freitas Filho, Walmir de
Pavani, Ahda Pionkoski Grilo
Title in English
Alternatives to the use of the crowbar circuit in DFIG based wind turbines during balanced voltage dips.
Keywords in English
Doubly fed induction generator
Voltage dip
Wind power
Abstract in English
Most of the modern wind turbines are based on doubly fed induction generators (DFIG), with a back to back power converter connecting the rotor to the network. It is known that voltage dips at the stator terminals can cause overcurrents in the rotor windings, which could threaten the converter integrity. In order to protect the converter, several strategies have been proposed in technical literature, requiring in some cases the converter deactivation, which disables the control that the converter has over the power transference between the generator and the system. This last is not a desirable behavior since it can put on risk the voltage stability of the electric system. It is the aim of this dissertation to introduce and compare five of those protection strategies, through the computational simulation of their performance in case of balanced voltage dips. In order to achieve this, the electromagnetic dynamic model of the DFIG was theoretically developed, as well as the models of the strategies of interest. Subsequently, the computational model of the system was assembled in the software Matlabs Simulink to finally perform the desired simulations and its corresponding analysis.
Title in Portuguese
Alternativas ao uso do sistema Crowbar em turbinas eólicas equipadas no DFIG durante afundamentos balanceados de tensão na rede.
Keywords in Portuguese
Circuitos elétricos
Energia eólica
Turbinas
Abstract in Portuguese
A maioria das turbinas eólicas modernas é baseada em geradores de indução duplamente alimentados (GIDE), com um back to back conversor de energia que liga o rotor para a rede. Sabe-se que as quedas de tensão nos terminais do estator podem causar sobrecorrentes nos enrolamentos do rotor, que podem ameaçar a integridade do conversor. A fim de proteger o conversor, várias estratégias têm sido propostas na literatura técnica, exigindo, em alguns casos, a desativação do conversor, o qual desativa o controlo do conversor, que possui ao longo da transferência de energia entre o gerador e o sistema. Este último não é um comportamento desejável, uma vez que pode colocar em risco a estabilidade de tensão do sistema elétrico. É o objetivo desta dissertação apresentar e comparar cinco dessas estratégias de proteção, através da simulação computacional de seu desempenho em caso de quedas de tensão equilibrada. A fim de alcançar este objetivo, o modelo dinâmico eletromagnética do DFIG teoricamente foi desenvolvido, bem como os modelos das estratégias de interesse. Subsequentemente, o modelo computacional do sistema foi montado no software Simulink do Matlab para finalmente executar as simulações desejadas e sua análise correspondente.
 
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Publishing Date
2016-10-19
 
WARNING: The material described below relates to works resulting from this thesis or dissertation. The contents of these works are the author's responsibility.
  • Avila, R. R., et al. Wind Turbine Grounding System Analysis during Lightning Strokes. In 15th International Conference on Electromagnetic Field Computation (CEFC 2012)), Oita, 2012. Anais., 2012. Abstract.
  • CORTES, D. J. F., Avila, R. R., and SALLES, M. B. C. Analysis of Transmission Systems with High Penetration of Wind Power using DFIG based Wind Farms during Voltage Sags. In International Conference on. CLEAN ELECTRICAL POWER Renewable Energy Resources Impact (ICCEP 2013), Alghero, 2013. anais., 2013.
  • Avila, R. R., Martinho, L. B., e Salles, Mauricio B.C. Estudo do Aterramento de Aerogeradores frente a Descargas Atmosféricas. In MOMAG 2012, João Pessoa, 2012. Anais., 2012.
  • FIGUEROA CORTES, DAVID J., AVILA NARANJO, RAFAEL R., y SALLES, M. B. C. Voltage sags and short circut analysis in power systems with high wind power penetration based on doubly fed induction generator [doi:10.1109/ISGT-LA.2013.6554401]. In 2013 IEEE PES Conference on Innovative Smart Grid Technologies (ISGT Latin America), Sao Paulo, 2013. 2013 IEEE PES Conference on Innovative Smart Grid Technologies (ISGT Latin America). : IEEE, 2013.
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