PI-PBC Approach for Voltage Regulation in Cuk Converters with Adaptive Load Estimation

This paper proposes a proportional-integral passivity-based controller (PI-PBC) for supporting voltage in linear loads integrated with Ćuk converters. An adaptive load estimator is also employed to avoid current measurements at the load point. This estimator permits an on-line estimation of the load conductance for maintaining the output voltage as constant as possible independent of its variations. The proposed PI-PBC allows guaranteeing stability conditions in Lyapunov's sense for a closed-loop operation by exploiting the port-Hamiltonian structure of the Ćuk converter model. Numerical simulations evidence the advantages of using PI actions for PBC designs compared with the classical interconnection and damping (IDA-PBC) approach. All numerical simulations are conducted via MATLAB/Simulink software.

• Autores: Montoya, Oscar; Gil-González, Walter; Garcés, Alejandro; Sierra, Federico; Hernandez, J.C.
• Fecha de publicación: 2020
• Institución: Universidad Tecnológica de Bolívar
• Repositorio: Repositorio Institucional UTB
• Idioma: eng
• OAI Identifier: oai:repositorio.utb.edu.co:20.500.12585/10005
• Acceso en línea: https://hdl.handle.net/20.500.12585/10005; https://ieeexplore.ieee.org/document/9258716
• Palabra clave: Ćuk converter; Load estimator; Passivity-based control; Voltage regulation; Port-Hamiltonian model; Stability analysis; LEMB
• Rights: closedAccess
• License: http://purl.org/coar/access_right/c_14cb