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34 results on '"Ibanez, Federico Martin"'

2. Network Topology Invariant Stability Certificates for DC Microgrids with Arbitrary Load Dynamics

Author

Chevalier, Samuel, Ibanez, Federico Martin, Cavanagh, Kathleen, Turitsyn, Konstantin, Daniel, Luca, and Vorobev, Petr

Subjects
Electrical Engineering and Systems Science - Systems and Control
Abstract

DC microgrids are prone to small-signal instabilities due to the presence of tightly regulated loads. This paper develops a decentralized stability certificate which is capable of certifying the small-signal stability of an islanded DC network containing such loads. Utilizing a novel homotopy approach, the proposed standards ensure that no system eigenmodes are able to cross into the unstable right half plane for a continuous range of controller gain levels. The resulting "standards" can be applied to variety of grid components which meet the specified, but non-unique, criteria. These standards thus take a step towards offering plug-and-play operability of DC microgrids. The proposed theorems are explicitly illustrated and numerically validated on multiple DC microgrid test-cases containing both buck and boost converter dynamics.

Published
2020

8. Hierarchical Cyclic Pursuit: Algebraic Curves Containing the Laplacian Spectra

Author

Parsegov, Sergei E., Chebotarev, Pavel Y., Shcherbakov, Pavel S., and Ibanez, Federico Martin

Abstract

This article addresses the problem of multiagent communication in networks with a regular directed ring structure. These can be viewed as hierarchical extensions of the classical cyclic pursuit topology. We show that the spectra of the corresponding Laplacian matrices allow exact localization on the complex plane. Furthermore, we derive a general form of the characteristic polynomial of such matrices, analyze the algebraic curves its roots belong to, and propose a way to obtain their closed-form equations. In combination with frequency-domain consensus criteria for high-order single-input single-output linear agents, these curves enable one to analyze the feasibility of consensus in networks with a varying number of agents.

Published
2023
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18. Supercapacitor Modeling: A System Identification Approach

Author

Slaifstein, Dario, Ibanez, Federico Martin, and Siwek, Katarzyna

Abstract

Recently a great deal of attention has been given to supercapacitors (SC) due to their outstanding power densities and long cycling life. Their behavior has been extensively analyzed and tested through several modeling approaches. One common technique for modeling the dynamic operation of SCs is through an electrical circuit model (ECM). This article presents a new approach to identifying ECM parameters by applying subspace system identification (SSID) algorithms and incorporating coulombic efficiency. This novel application of SSID improves model accuracy by almost 50% in some cases compared to the literature procedures. This was done without manual tuning of the parameters, risk of non-convergence or any prior knowledge. The approach was validated at three different temperatures and with experimental data from an electric motorcycle. The resulting models are ready to be used as building blocks in a wide range of applications such as energy management systems, renewable power generation, electric vehicles, and microgrids.

Published
2023
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