A novel optimization harmonic elimination technique for cascaded multilevel inverter

Ezzidin Hassan Aboadla (International Islamic University Malaysia)
Sheroz Khan (International Islamic University Malaysia)
Mohamed H. Habaebi (International Islamic University Malaysia)
Teddy Surya Gunawan (International Islamic University Malaysia)
Belal A. Hamida (International Islamic University Malaysia)
Mashkuri Bin Yaacob (International Islamic University Malaysia)
Ali Aboadla (Higher Institute of Science and Technology)

Bulletin of Electrical Engineering and Informatics
Vol 8, No 2: June 2019

The main goal of utilizing Selective Harmonic Elimination (SHE) techniques in Multilevel Inverters (MLI) is to produce a high-quality output voltage signal with a minimum Total Harmonic Distortion (THD). By calculating N switching angles, SHE technique can eliminate (N-1) low order odd harmonics of the output voltage waveform. To optimized and obtained these switching angles, N of nonlinear equations should be solved using a numerical method. Modulation index (m) and duty cycle play a big role in selective harmonic elimination technique to obtain a minimum harmonic distortion and desired fundamental component voltage. In this paper, a novel Optimization Harmonic Elimination Technique (OHET) based on SHE scheme is proposed to re-mitigate Total Harmonic Distortion. The performance of seven-level H-bridge cascade inverter is evaluated using PSIM and validated experimentally by developing a purposely built microcontroller-based printed circuit board.