A multilevel modular DC DC converter topology

[EN] A multilevel modular DC DC power conversion topology based on cascaded H-Bridge converters in a double II configuration is presented. The topology is intended to interconnect large power DC networks. A two level control hierarchy is used to regulate the DC voltage of each H-bridge module. At the top level, DC and circulating AC currents are used to control the total energy converter in all branches (both parallels and series) of each II arrange. At bottom level, the voltage balance of a converter branch, which comprises N H-bridge modules, is carried out by balancing (N-1) capacitor voltage deviations, with respect to the average capacitor voltage. The entire topology and control strategies are simulated in a PSIM environment. Simulation results with three H-bridge converters per branch are shown and preliminary experimental results with a low power prototype are also included.This work was supported by Fondecyt grant 1151325, CONICYT/FONDAP/15110019, The Spanish Ministry of Economy and EU FEDER funds under grant DPI2014-53245-R, The University of Magallanes grant PR-FI-02IE14/15, Universitat Jaume I grant P1.1B2013-51, the Newton Picarte Project EPSRC:EP/N004043/1 and CONICYT DPI20140007.Vidal, R.; Soto, D.; Andrade, I.; Riedemann, J.; Pesce, C.; Belenguer, E.; Pena, R.... (2016). A multilevel modular DC DC converter topology. Mathematics and Computers in Simulation. 99(1):1-14. https://doi.org/10.1016/j.matcom.2015.12.00411499