Sequential Phase-Shifted Model Predictive Control for a Multilevel Converter with Integrated Battery Energy Storage

Sebastián Neira, Pablo Poblete, Rodrigo Cuzmar, Javier Pereda, Ricardo P. Aguilera

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract / Description of output

Cascaded converters have risen as a suitable solution for the connection of Utility-scale Battery Energy Storage Systems (BESS) to the grid. These converters allow to split the battery array into the power modules, reducing the total series-connected battery cells and improving the reliability of the system. Different types of modules have been proposed to integrate the batteries in the converter. The three-port full-bridge module connects the batteries through a second deport decoupled from the harmful low-frequency oscillations and current peaks. However, the multi-variable controller required to manage the power interaction between the battery and the grid presents a challenge in terms of computational burden and scalability. This work proposes the use of the Sequential Phase-Shifted Model Predictive Control (PS-MPC) in a multilevel BESS implementation using three-port full-bridge modules. The proposed controller outperforms a standard FCS-MPC, as it obtains the optimal duty cycles for the operation of the converter with the same fast dynamic response, but also with the fixed spectrum of the PS-PWM and low computational burden, which facilitates its scalability to multilevel BESS with a large number of cells. Simulation results show the ability of the system to exchange different amounts of power with the grid, ensuring the best battery operational conditions.
Original languageEnglish
Title of host publication2020 IEEE 11th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)
PublisherIEEE
Pages29-34
Number of pages6
ISBN (Print)978-1-7281-6991-0
DOIs
Publication statusPublished - 9 Oct 2020
Event2020 IEEE 11th International Symposium on Power Electronics for Distributed Generation Systems (PEDG) - Dubrovnik, Croatia
Duration: 28 Sept 20201 Oct 2020

Conference

Conference2020 IEEE 11th International Symposium on Power Electronics for Distributed Generation Systems (PEDG)
Period28/09/201/10/20

Keywords / Materials (for Non-textual outputs)

  • Batteries
  • Topology
  • Mathematical model
  • Steady-state
  • Inductors
  • Capacitors
  • Switches

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