CH.ANUSHA; T.RAGHU. Enhancement of Three-Phase Four-Wire UPQC Topology for Power Quality Problems-Sags and Swells. International Journal of Advance Engineering and Research Development (IJAERD), [S. l.], v. 1, n. 8, p. 225–230, 2014. Disponível em: https://ijaerd.org/index.php/IJAERD/article/view/227. Acesso em: 7 jul. 2025.