Search

Your search keyword '"Leyva, Ramon"' showing total 5 results
Start Over Author "Leyva, Ramon" Journal ieee transactions on industrial electronics
5 results on '"Leyva, Ramon"'

3. Model Predictive Control for Intersubmodule State-of-Charge Balancing in Cascaded H-Bridge Converter-Based Battery Energy Storage Systems

Author

Liang, Gaowen, Rodriguez, Ezequiel, Farivar, Glen G., Nunes, Enrique, Konstantinou, Georgios, Townsend, Christopher D., Leyva, Ramon, and Pou, Josep

Abstract

In the operation of battery energy storage systems based on the cascaded H-bridge converter, it is beneficial to balance the state of charge of batteries in different submodules within the converter phase-arm. This is achieved by distributing the active power among the submodules. Although multiple methods have been proposed for this purpose, they face the challenge of rendering optimal active power distributions that maximize balancing speed while meeting power constraints in the battery energy storage system. To overcome this challenge, a model predictive control scheme is developed in this article. The proposed method is remarkably robust against parametric uncertainties (battery voltage, capacity, etc.), as evidenced by its ability to tolerate a substantial 50% uncertainty in the parameters, resulting in a mere 0.05% steady-state error. Furthermore, because the predictive control can be executed at a low frequency, the computational burden is comparable to other existing methods.

Published
2024
Full Text
View/download PDF

4. Robust LQR control for PWM converters: an LMI approach

Author

Olalla, Carlos, Leyva, Ramon, Aroudi, Abdelali El, and Queinnec, Isabelle

Subjects
Electric current converters -- Design and construction, Pulse-duration modulation -- Methods, Power electronics -- Research, Electric current converter, Business, Computers, Electronics, Electronics and electrical industries
Abstract

A consistent framework for robust linear quadratic regulators (LQRs) control of power converters is presented. Systems with conventional LQR controllers present good stability properties and are optimal with respect to a certain performance index. However, LQR control does not assure robust stability when the system is highly uncertain. In this paper, a convex model of converter dynamics is obtained taking into account uncertainty of parameters. In addition, the LQR control for switching converters is reviewed. In order to apply the LQR control in the uncertain converter case, we propose to optimize the performance index by using linear matrix inequalities (LMIs). As a consequence, a new robust control method for dc-dc converters is derived. This LMI-LQR control is compared with classical LQR control when designing a boost regulator. Performance of both cases is discussed for load and line perturbations, working at nominal and nonnominal conditions. Finally, the correctness of the proposed approach is verified with experimental prototypes. Index Terms--Optimal control, power electronics, robustness.

Published
2009

Catalog

Books, media, physical & digital resources
See catalog results