Control of Variable Pitch and Variable Speed Direct-Drive Wind Turbines in Weak Grid Systems with active Power Balance. International Journal of Current Engineering and Technology, [S. l.], v. 7, n. 4, p. 1471–1475, 2017. Disponível em: https://ijcet.evegenis.org/index.php/ijcet/article/view/2411. Acesso em: 13 mar. 2026.