Prema Kumar Navuri, Manmadha Kumar Boddepalli. “Performance Analysis of PIDD Controllers for Automatic Load Frequency Control of Multi-Area Power System”. International Journal of Control and Automation 13, no. 4 (May 18, 2020): 366 - 377. Accessed September 18, 2021. https://sersc.org/journals/index.php/IJCA/article/view/16452.