Work

Quasi-modified-Newton method-based selective harmonic elimination in cascaded H bridge inverters

Year: 2024

Type: article

Abstract: Multilevel converters have gained significant popularity in medium-voltage and high-power applications due to their numerous advantages over traditional two-level converters. These advantages include reduced harmonic distortion, improved efficiency, and lower stress on power semiconductors. Selective harmonic elimination (SHE) is a modulation method that can be employed with multilevel converters to achieve high-quality output voltage waveforms. In this work, an extension of Broyden's method, known as the Quasi-Modified Newton Method, is implemented for selective harmonic elimination and accurate calculation of switching angles for a wide range of modulation indices. The proposed method is applied to cascaded H bridge inverters operating at levels 5, 7, and 9. The method offers simplicity, reduced computational burden, and faster convergence, making it easily implementable, reducing total harmonic distortion (THD), and reducing RMSE and MAD errors. The paper includes simulation and experimental results that validate the accuracy and effectiveness of the proposed approach.

Source: Scientific Reports

DOI: 10.1038/s41598-024-75685-7

Authors: Bisma Saif, Uzma Masood, Adil Sarwar, Shafiq Ahmad, Liang-Yin Huang, Hwa-Dong Liu

Institutions: Aligarh Muslim University, King Saud University, Asia Eastern University of Science and Technology, National Taiwan Normal University

Language: English

Topic: Multilevel Inverters and Converters

Subfield: Electrical and Electronic Engineering

Field: Engineering

Domain: Physical Sciences

SDGs: Affordable and clean energy, Industry, innovation and infrastructure

Open Access status: gold

Estimated APC paid: $2,590