Dynamic Voltage Restorer to Mitigate Voltage Sag/Swell using Black Widow Optimization Technique with FOPID Controller - B. Srikanth Goud; M. Kiran Kumar; Narisetti Ashok Kumar; Ch. Naga Sai Kalyan; Mohit Bajaj; Subhashree Choudhury; Swati Shukla (EAI Endorsed Trans. Energy Web, 2023)