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Inherently Decoupled Dc-Link Capacitor Voltage Control of Multilevel Neutral-Point-Clamped Converters

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posted on 2023-03-27, 05:10 authored by Gabriel Garcia-RojasGabriel Garcia-Rojas, Sergio Busquets-MongeSergio Busquets-Monge, Robert Griñó, José M. Campos-Salazar

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. The good performance of such control is confirmed through simulations and experiments. 


This work was supported by the European Union’s Horizon Europe research and innovation program under grant agreement No. 101056781.Views and opinions expressed are however those of the authors only and do not necessarily reflect those of the European Union or CINEA. Neither the European Union nor the granting authority can be held responsible for them.

This work was supported in part by the Generalitat de Catalunya under Grant 2021 SGR 00376.


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Universitat Politecnica de Catalunya

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  • Spain