THD reduction in a 13-level multilevel inverter using the angle control technique

Dewan Ashikur Rahaman (University of Asia Pacific)
Aive Alamgir (University of Asia Pacific)
Md Ashraf Hossain (University of Asia Pacific)
Tapan Kumar Chakraborty (University of Asia Pacific)
Raisul Islam Rafi (University of Asia Pacific)
Raiyan Rahman Zihad (University of Asia Pacific)
Md. Abdullah Al Mahmud (University of Asia Pacific)
Samia Sarkar (University of Asia Pacific)

International Journal of Power Electronics and Drive Systems (IJPEDS)
Vol 17, No 3: September 2026

When compared to a traditional multilevel inverter, multilevel inverters can produce switched waveforms with lower amounts of harmonic distortion. Due to their capacity to provide excellent output waveforms at lower switching frequencies and without distortion, multilevel inverters have recently attracted more attention. The dynamic voltage restorer's multilevel topology reduces the output waveform's harmonic distortion without causing inverter power output losses. This study examines the most widely used topologies to determine how the sinusoidal switching angle affects total harmonic distortion (THD%). Among the crucial multilevel topologies, the cascaded H-bridge was selected. Because it needed fewer parts than the others. Asymmetric was selected for observation and simulations of output voltages up to Fifteen levels for equal and sinusoidal angles using PSIM software after a review of the literature. Appropriate switching angles were maintained in this research. With fewer H-bridges, higher-level multilevel inverters have been manufactured.