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Umar Khan, M, Dordevic, O and Jones, M (2022) Current THD comparison of different offset injections in the linear modulation range for cascaded H-bridge converters. In: 2022 XIV International Symposium on Industrial Electronics and Applications (INDEL) . (2022 XIV International Symposium on Industrial Electronics and Applications (INDEL), Banja Luka, Bosnia and Herzegovina).
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Abstract
The equivalence of space vector pulse width modulation (PWM) and carrier-based PWM through the injection of a common-mode voltage is already known for two-level (first min-max injection) and multilevel (double min-max injection) three-phase converters. However, under regular sampled phase voltage references, these injections do not produce the lowest total harmonic distortion (THD) of the load phase current throughout the linear modulation index range. This paper proposes the use of a similar common-mode injection, called the second min-max injection that achieves the lowest current THD in regions of the modulation index range where the double min-max injection fails to do so. A cascaded H-bridge (CHB) topology is analyzed, and comparison is made between different multicarrier modulation strategies, using simulation results, under different injections for the whole modulation index range. The level-shifted in-phase disposition modulation method is found to produce the lowest load phase current THD with second min-max offset voltage injection for modulation indices below unity. For modulation indices greater than one, the double min-max injection is still considered as optimal.
| Item Type: | Conference or Workshop Item (Paper) |
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| Additional Information: | © 2022 IEEE. Personal use of this material is permitted. Permission from IEEE must be obtained for all other uses, in any current or future media, including reprinting/republishing this material for advertising or promotional purposes, creating new collective works, for resale or redistribution to servers or lists, or reuse of any copyrighted component of this work in other works. |
| Subjects: | T Technology > T Technology (General) T Technology > TA Engineering (General). Civil engineering (General) |
| Divisions: | Engineering |
| Publisher: | IEEE |
| SWORD Depositor: | A Symplectic |
| Date Deposited: | 13 Dec 2022 12:41 |
| Last Modified: | 13 Dec 2022 12:41 |
| DOI or ID number: | 10.1109/indel55690.2022.9965469 |
| URI: | https://researchonline.ljmu.ac.uk/id/eprint/18386 |
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