Abstract
Multilevel inverters are the best suitable power electronics converters over conventional two/three-level inverters to provide high power quality ac waveforms. However, the quality of the ac power highly depends on the modulation scheme employed by the multilevel inverter. The use of a low-switching frequency modulation scheme is strongly emphasized over a high-switching frequency modulation scheme because of numerous advantages such as lesser power loss, lower switching stress, improved converter efficiency and enhanced converter lifetime. This paper presents a variant of the Nearest Level Modulation scheme, which is based on the geometric nature of variation of MLI switching angles. Hence, the proposed NLM scheme is termed as Geometric-NLM (G-NLM). A seven-level symmetric CCS-MLI topology is taken for the case study, and the proposed modulation scheme is implemented on it. Matlab/Simulink is used to carry out the simulation, and the results are presented. The G-NLM is found to have reduced the voltage THD and improved other MLI parameters compared to the conventional NLM scheme.
| Original language | Undefined/Unknown |
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| Title of host publication | IECON 2020 The 46th Annual Conference of the IEEE Industrial Electronics Society |
| Number of pages | 5 |
| Publisher | IEEE |
| Publication date | 2020 |
| Pages | 3138-3142 |
| Article number | 9254314 |
| ISBN (Print) | 978-1-7281-5415-2 |
| ISBN (Electronic) | 978-1-7281-5414-5 |
| DOIs | |
| Publication status | Published - 2020 |
| Event | IECON 2020 - 46th Annual Conference of the IEEE Industrial Electronics Society - Online Duration: 18 Oct 2020 → 21 Oct 2020 https://www.iecon2020.org/ |
Conference
| Conference | IECON 2020 - 46th Annual Conference of the IEEE Industrial Electronics Society |
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| Location | Online |
| Period | 18/10/2020 → 21/10/2020 |
| Internet address |
| Series | Proceedings of the Annual Conference of the IEEE Industrial Electronics Society |
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| ISSN | 1553-572X |