Satyam Patel, MPS Chawla, and Sandeep Bhongade. 2018. “Power QualityAnalysis by Calculating Total Harmonic Distortion at Different Sag Values Using Dynamic Voltage Restorer”. Journal of Power Electronics and Devices 3 (3):34-47. http://matjournals.co.in/index.php/JOPED/article/view/6497.