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All Journal International Journal of Power Electronics and Drive Systems (IJPEDS)
Hazwaj Mhd Poad
Universiti Tun Hussein Onn Malaysia
Control & Systems Engineering Electrical & Electronics Engineering

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Design of 7-level cascade asymmetric multilevel inverter for renewable energy applications using FPGA Afarulrazi Abu Bakar; Hazwaj Mhd Poad; Benjamin Ho Hao Xian; Tharnisha Sithananthan; Wahyu Mulyo Utomo; Triyanto Pangaribowo
International Journal of Power Electronics and Drive Systems (IJPEDS) Vol 17, No 2: June 2026
Publisher : Institute of Advanced Engineering and Science

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.11591/ijpeds.v17.i2.pp1231-1242

Abstract

The increasing focus on renewable energy has driven the need for efficient and reliable power converters. Multilevel inverters offer low harmonic distortion and high-quality output but often suffer from design complexity and excessive component count. This study presents the design and implementation of a 7-level cascaded asymmetric multilevel inverter optimized for renewable energy applications. The proposed topology utilizes a cascade structure with asymmetric DC voltage sources to generate seven voltage levels, providing a practical balance between performance and simplicity. The design was first validated through MATLAB/Simulink software to analyze circuit operation and evaluate the total harmonic distortion (THD) performance. Experimental evaluation was then conducted using a hardware prototype to verify simulation results. Without a filter, the THD from the simulation was 21.31%, while the experimental setup recorded a slightly higher value of 21.61%, indicating a marginal difference of 0.21%. With a filter, the simulation achieved a THD of 3.81%, whereas the experimental setup outperformed with a THD of 1.5%, showing a notable reduction of 2.31%. These findings confirm the proposed inverter’s capability to deliver superior power quality and operational efficiency. The combination of simulation and experimental validation demonstrates the practicality and reliability of the 7-level cascade asymmetric multilevel inverter for renewable energy applications.
Co-Authors Afarulrazi Abu Bakar Benjamin Ho Hao Xian Tharnisha Sithananthan Triyanto Pangaribowo Wahyu Mulyo Utomo