autores Afonso, João L. Júlio Manuel de Sousa Barreiros Martins MANUEL JOÃO SEPÚLVEDA MESQUITA DE FREITAS Freitas, Manuel Freitas, M.J.S. Julio S. Martins
palavras-chave Active filters Circuits Control systems Harmonic analysis Power harmonic filters Power system analysis computing Power system control Power system harmonics Power systems Reactive power control