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Neutral-Point-Clamped Five-Level Inverter With Self-Balanced Switched Capacitor.
- Source :
-
IEEE Transactions on Industrial Electronics . Mar2022, Vol. 69 Issue 3, p2202-2215. 14p. - Publication Year :
- 2022
-
Abstract
- In this article, a new five-level inverter is developed by inserting a switched-capacitor (SC) unit into the traditional three-level neutral-point-clamped (NPC) inverter phase leg. The SC unit consists of two capacitors and one bidirectional switch, all of which withstand a quarter of the dc input voltage. While increasing the output levels, the performance is also improved in terms of power loss, common-mode voltage, switching stress dv/dt, and output filter. Compared to other five-level inverters like the conventional NPC and active NPC five-level topologies, the new solution not only reduces the number of components and simplifies the design but also has the advantage of self-balanced capacitor voltages. The analysis, simulation, and experiment indicate that the proposed inverter is suitable for a wide range of applications like renewable source grid-connected interfaces and motor drivers. Simulation and experimental results of grid-connected operation verify that the new inverter is capable of providing both active and reactive power to the grid. Its excellent performance is also experimentally evaluated by a 1.2-kW prototype and the measured efficiency is above 97% for a wide range of load. [ABSTRACT FROM AUTHOR]
Details
- Language :
- English
- ISSN :
- 02780046
- Volume :
- 69
- Issue :
- 3
- Database :
- Academic Search Index
- Journal :
- IEEE Transactions on Industrial Electronics
- Publication Type :
- Academic Journal
- Accession number :
- 154075187
- Full Text :
- https://doi.org/10.1109/TIE.2021.3066932