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Proteção inteligente de transformadores: Abordagem hÃbrida para discriminação de falhas
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ISBN10: 6208923034
ISBN13: 9786208923037
Publisher: Edicoes Nosso Conhecimento
Published: May 31 2025
Pages: 112
Weight: 0.35
Height: 0.27 Width: 6.00 Depth: 9.00
Language: Portuguese
ISBN13: 9786208923037
Publisher: Edicoes Nosso Conhecimento
Published: May 31 2025
Pages: 112
Weight: 0.35
Height: 0.27 Width: 6.00 Depth: 9.00
Language: Portuguese
Nos transformadores de potência modernos, a proteção diferencial convencional com restrição de harmónicas tem muitas vezes dificuldades devido aos nÃveis mais baixos de segundas harmónicas resultantes de materiais de núcleo melhorados e da saturação do TC durante defeitos graves. Estes desafios podem levar a operações falsas, identificando erroneamente fenómenos benignos, tais como a irrupção de magnetização, a sobre-excitação e as falhas internas. Este livro apresenta um novo esquema de proteção digital que emprega um algoritmo hÃbrido KNN-GA para distinguir com precisão as verdadeiras falhas internas das condições de não-falta. Utilizando a transformada wavelet discreta para extração de caraterÃsticas, o esquema capta parâmetros estatÃsticos crÃticos, enquanto o método K-nearest Neighbor, optimizado com um Algoritmo Genético, aumenta a precisão da classificação. Experiências laboratoriais extensivas e a implementação DSP em tempo real no TMS320C6713T demonstram que esta abordagem hÃbrida supera os métodos tradicionais como ANN e SVM, proporcionando uma proteção de transformador mais rápida, mais segura e mais fiável nas redes eléctricas modernas.
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