Multi-level inverters’ popularity over traditional inverters can be attributed to its low total harmonic distortion. Multi-level inverter is used both for high and low power applications. This study uses Equal phase method to analyze the total Harmonic distortion of 3, 5, 7 and 9 levels by using Cascaded H-Bridge configuration for such analysis. The total harmonic distortions of three, five, seven and nine levels are analyzed, studied and finally their output is compared through fast Fourier transform. Results are acquired by simulating Cascaded H-Bridge Multi-level inverter with MATLAB/Simulink. Simulation results reveal that total Harmonics Distortion reduces as voltage level is increased. Total harmonic distortion for 3, 5, 7 and 9 levels is 41.42, 39.46, 39.40 and 22.50 percent respectively.
Muhammad Salman Abdul Basit Aemal Ahmad Zeeshan Saeed Shah and Kamran Alam Modeling of Cascaded H-Bridge Multi-level Inverter Having Low Total Harmonic Distortion by using E International Journal of Engineering Works Vol. 6 Issue 03 PP. 84-89 March 2019
 Thongprasri, P. "A 5-level three-phase cascaded hybrid multilevel inverter." International Journal of Computer and Electrical Engineering 3.6 (2011): 789.
 Singh, Gurcharan, and Vijay Kumar Garg. "THD analysis of cascaded H-bridge multi-level inverter." Signal Processing, Computing and Control (ISPCC), 2017 4th International Conference on. IEEE, 2017.
 Gaikwad, Asha, and Pallavi Appaso Arbune. "Study of cascaded H-Bridge multilevel inverter." Automatic Control and Dynamic Optimization Techniques (ICACDOT), International Conference on. IEEE, 2016.
 Karnik, Neha, Deepshikha Singla, and P. R. Sharma. "Comparative analysis of harmonic reduction in multilevel inverter." Power India Conference, 2012 IEEE Fifth. IEEE, 2012.
Jalakanuru, Nageswara Rao, and Meseret Yenesew Kiber. "Switching Angle Calculation By EP, HEP, HH And FF Methods For Modified 11-Level Cascade H-Bridge Multilevel Inverter."
 Singla, Deepshikha, P. R. Sharma, and Narender Hooda. "INTERNATIONAL JOURNAL OF ENGINEERING SCIENCES & MANAGEMENT." Int. J. of Engg. Sci. & Mgmt.(IJESM) 1.1 (2011): 64-76.
 Leonard, J., et al. "Experimental PWM method validation of a 9-level 4.16 kV series connected H-bridge grid simulator." Power and Energy Conference at Illinois (PECI), 2016 IEEE. IEEE, 2016.
 Farokhnia, Naeem, et al. "Calculating the formula of line-voltage THD in multilevel inverter with unequal DC sources." IEEE Transactions on Industrial Electronics 58.8 (2011): 3359-3372.
 Lai, Jih-Sheng, and Fang Zheng Peng. "Multilevel converters-a new breed of power converters." Industry Applications Conference, 1995. Thirtieth IAS Annual Meeting, IAS 95., Conference Record of the 1995 IEEE. Vol. 3. IEEE, 1995.
 Tapuchi, Saad, et al. "Equal Switching Distribution Method for Multi-Level Cascaded Inverters." Energy and Power Engineering 5.09 (2013): 560.