Application of Whale Optimization Algorithm Based FOPI Controllers for STATCOM and UPQC to Mitigate Harmonics and Voltage Instability in Modern Distribution Power Grids. - Mohamed Metwally Mahmoud; Basiony Shehata Atia; Yahia M. Esmail; Sid Ahmed El Mehdi Ardjoun; Noha Anwer; Ahmed Ibrahim Omar; Faisal Alsaif; Sager Alsulamy; Shazly A. Mohamed (Axioms, 2023)