A review on intelligence algorithms for THD minimization in multi-level inverter

ABSTRACT

The multi-level inverter (MLI) is advantageous for DC to AC voltage conversion in power distribution networks. The low-power applications require square and quasi-square waveforms, whereas the sinusoidal waveform is required in high-power applications. The pure sinusoidal waveform of an inverter is obtained by improving the number of levels in the inverter. Hence, more switches and DC sources are used in the inverters to produce multi-levels at the output. The large number of switches and DC sources increases harmonics in the system. The modulation techniques are used with the MLI topologies to alleviate these issues. Recently, modulation techniques based on optimization algorithms have been used to minimize Total Harmonic Distortion (THD). This paper reviews optimization algorithm-based modulation techniques in the recent literature. This review aims to provide an effective solution for enhancing THD in MLI. Different MLI types are initially explained, and then the recent algorithms are explained for THD minimization.

KEYWORDS:

• Lower order harmonics
• Modulation index multi-level inverter
• Optimization algorithm
• Switching angles
• Total harmonic distortion

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No potential conflict of interest was reported by the author(s).

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Data sharing is not applicable to this article.

Additional information

Funding

No funding is provided for the preparation of manuscript.

Notes on contributors

P V V Raghava Sharma

P V V Raghava Sharma is a Research Scholar at Visvesvaraya Technological University, Belagavi & Research Centre, Guru Nanak Dev Engineering College, Bidar. Also, currently working as an Assistant Professor, EEE Department, Maturi Venkata Subba Rao Engineering College Hyderabad, India.

Neelshetty K

Dr Neelshetty K is currently working as a Professor in the EEE Dept, Guru Nanak Dev Engineering College, Bidar, India.