Affiliation:
1. Department of Electronic Engineering, Universitat Politècnica de Catalunya, 08028 Barcelona, Spain
Abstract
This letter derives and discusses the superiority of a simple dc-link capacitor voltage control configuration for multilevel neutral-point-clamped converters with any number of levels. The control involves n − 2 control loops regulating the difference between the voltage of neighbor capacitors. These control loops are inherently decoupled, i.e., they are independent and the control action of one loop does not affect the others. This method is proven to be equivalent to previously published approaches, with the added advantages of increased simplicity and scalability to a higher number of levels, all while imposing a lower computational burden. The good performance of such control is confirmed through simulations and experiments.
Funder
European Union’s Horizon Europe research and innovation program
Generalitat de Catalunya
Reference12 articles.
1. Recent advances and industrial applications of multilevel converters;Kouro;IEEE Trans. Ind. Electron.,2010
2. Multilevel Converters: Fundamental Circuits and Systems;Akagi;Proc. IEEE,2017
3. Multilevel converters: Control and modulation techniques for their operation and industrial applications;Leon;Proc. IEEE,2017
4. Alepuz, S., Busquets-Monge, S., Nicolas-Apruzzese, J., Filbà-Martínez, À., Bordonau, J., Yuan, X., and Kouro, S. (2022). A survey on capacitor voltage control in neutral-point-clamped multilevel converters. Electronics, 11.
5. Decoupled dc-link capacitor voltage control of dc-ac multilevel multileg converters;Bordonau;IEEE Trans. Ind. Electron.,2016