SB Bashir, HA Zidan, ZA Memon, A Modified CPS-PWM for Capacitor Voltage Ripples Reduction of Modular Multilevel Converter Based Variable Speed Drive, International Symposium on Industrial Electronics (ISIE), 2020 IEEE 29th, Published on June 2020, pp 601-605. DOI: http://doi.org/10.1109/ISIE45063.2020.9152591.