PI–Controlled Shunt Active Power Filter for Effective Elimination of Harmonics in Transmission System Based on PQ Theory. International Journal of Current Engineering and Technology, [S. l.], v. 5, n. 2, p. 673–680, 2015. Disponível em: https://ijcet.evegenis.org/index.php/ijcet/article/view/2015. Acesso em: 12 apr. 2026.