Supercapacitor-based energy storage system using two- and three-level converter topologies

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Zalapa, Andrea Xiomara Monroy and Manjarrez, Daniela Bobadilla and Monroy-Morales, José Luis and Peña-Alzola, Rafael and Campos-Gaona, David; (2026) Supercapacitor-based energy storage system using two- and three-level converter topologies. In: 2025 IEEE International Autumn Meeting on Power, Electronics and Computing (ROPEC). 2025 IEEE International Autumn Meeting on Power, Electronics and Computing (ROPEC) . IEEE, MEX, pp. 1-5. ISBN 979-8-3315-7673-8 (https://doi.org/10.1109/ropec68163.2025.11353982)

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Abstract

The integration of renewable energy sources into power systems requires efficient and reliable energy storage solutions to manage supply fluctuations and ensure grid stability. Supercapacitors offer a compelling option due to their electrostatic energy storage, with long life cycle, and rapid charge-discharge capabilities. This work proposes a Supercapacitor-based Energy Storage System (SCESS) interfaced with the electrical grid via an Active Neutral-Point Clamped (ANPC) converter. The supercapacitor is directly connected to the DC-link without requiring an intermediate converter. The overall system dynamically operates in either two-level or three-level mode based on the supercapacitor voltage, optimizing efficiency. A vector control strategy in the d-q reference frame enables precise active and reactive power management, using PI controllers and a phase-locked loop for synchronization. Simulations demonstrate accurate tracking of power references under various operating conditions. The study highlights the ANPC-based SCESS as a viable and sustainable solution for future smart grids, offering superior cost and efficiency compared to conventional storage systems.

ORCID iDs

Zalapa, Andrea Xiomara Monroy, Manjarrez, Daniela Bobadilla, Monroy-Morales, José Luis, Peña-Alzola, Rafael ORCID logoORCID: https://orcid.org/0000-0002-2451-6779 and Campos-Gaona, David ORCID logoORCID: https://orcid.org/0000-0002-0347-6288;
CORE (COnnecting REpositories)