Revista Eletrônica de Potência (Brazilian Journal of Power Electronics)

Palavras Chaves: Atpdraw Distorções harmônicas, Estabilidade ressonante, Geração Eólica, Modelagem

Resumo
Nos últimos anos, a temática das interações harmônicas e inter-harmônicas, no âmbito de sistemas renováveis de geração, vem ganhando destaque a partir de considerações acerca da sua dinâmica de controle e chaveamento de conversores. Neste contexto, cresce-se a necessidade de análise da ocorrência de oscilações harmônicas, as quais podem variar desde baixas frequências a elevadas. Assim, modelos computacionais têm sido testados e colocados à prova, com o intuito de avaliar sua representatividade frente aos fenômenos desta natureza. O presente informe técnico tem por objetivo esclarecer de forma simples e direta as diferenças conceituais dos fenômenos de emissão harmônica, além de propor uma revisão bibliográfica detalhada dos principais métodos de modelagem de sistemas eólicos, com foco em estratégias no domínio do tempo. Para tanto, três distintos modelos de aerogeradores serão implementados no simulador Atpdraw. Os parâmetros e medições utilizados como base de comparação dos modelos implementados são reais e advindos de um parque eólicos situado no nordeste do Brasil. De posse dos resultados do estudo proposto é possível concluir que os modelos apresentados podem ser utilizados como ferramentas importantes para análise dos fenômenos de interações harmônicas, e se mostram mais atraentes que os equivalentes de Thévenin e Norton para a representatividade da rede equivalente. Neste parque tem se verificado problemas correlatos à queima de equipamentos e mal funcionamentos provocados por interações harmônicas

Title: MULTI-FREQUENCY HARMONIC MODEL OF DFIG-BASED WIND FARMS FOR HARMONIC EMISSION AND HARMONIC STABILITY STUDIES

Keywords: Atpdraw Harmonic Distortion, Harmonic Instability, modeling, wind generation

Abstract
In recent years, the theme of harmonic and inter-harmonic interactions, in the scope of renewable generation systems, has been gaining prominence from considerations about its dynamics of control and switching of converters. In this context, there is a growing need to analyze the occurrence of harmonic oscillations, which can vary from low frequencies to high frequencies. Thus, computational models have been tested and put to the test, in order to assess their representativeness against phenomena of this nature. This technical report aims to clarify in a simple and direct way the conceptual differences of harmonic emission phenomena, in addition to proposing a detailed bibliographic review of the main methods of modeling existing wind systems, focusing on strategies in the time domain. For that, three different models of wind turbines will be implemented in the Atpdraw simulator. The parameters and measurements used as a basis for comparison of the implemented models are from a wind farm located in the northeast of Brazil. With the results of the proposed study, it is possible to conclude that the models presented can be used as important tools for analyzing the phenomena of harmonic interactions, and are more attractive than the Thévenin and Norton equivalents for the representativeness of the equivalent network. In this park there have been problems related to equipment burning and malfunctions caused by harmonic interactions

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