Unified Cost Function Model Predictive Control for a three-stage Smart Transformer

Tarisciotti, Luca; Buticchi, Giampaolo; De Carne, Giovanni; Yang, Jiajun; Gu, Chunyang; Wheeler, Pat

Abstract

The massive integration of power electronics-based renewable energy sources has profoundly changed the electrical grid. In this scenario, the smart transformer, which is a solid-state transformer with advanced control and communication features, has been proposed as one of the solutions to offer new grid services, while mitigating electrical grid issues, including voltage/frequency disturbance, harmonics, voltage instability, and to pave the way towards dc grids. The commonly proposed topology for ST is the three-stage ac-dc-dc-ac converter, due to the availability of the dc link at both medium-and low-voltage sides. The control design usually relies on the well-known techniques of pole/zero placement and each conversion stage is considered separately. This paper proposes a unified predictive control of the three stages of the ST that allows to control all the variables with a single cost function. Simulation results show the effectiveness of the proposed solution in guaranteeing excellent current tracking performance and good disturbance rejection.

Citation

Tarisciotti, L., Buticchi, G., De Carne, G., Yang, J., Gu, C., & Wheeler, P. (2021). Unified Cost Function Model Predictive Control for a three-stage Smart Transformer. . https://doi.org/10.1109/ECCE47101.2021.9595809

• Presentation Conference Type: Conference Paper (Published)
• Conference Name: 2021 IEEE Energy Conversion Congress and Exposition (ECCE)
• Start Date: Oct 10, 2021
• End Date: Oct 14, 2021
• Acceptance Date: May 1, 2021
• Online Publication Date: Nov 16, 2021
• Publication Date: Oct 14, 2021
• Deposit Date: Feb 15, 2022
• Publicly Available Date: Feb 15, 2022
• Publisher: Institute of Electrical and Electronics Engineers
• Pages: 3468-3475
• ISBN: 9781728161280
• DOI: https://doi.org/10.1109/ECCE47101.2021.9595809
• Keywords: predictive control; solid state transformer; dc microgrids; smart transformer
• Public URL: https://nottingham-repository.worktribe.com/output/7467796
• Publisher URL: https://ieeexplore.ieee.org/document/9595809
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