Adaptive Sensorless PI+Passivity-Based Control of a Boost Converter Supplying an Unknown CPL

Sebastián Riffo (), Walter Gil-González, Oscar Danilo Montoya, Carlos Restrepo () and Javier Muñoz ()
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Sebastián Riffo: Department of Electrical Engineering, Universidad de Talca, Curicó 3340000, Chile
Walter Gil-González: Department of Electrical Engineering, Universidad Tecnológica de Pereira, Pereira 660003, Colombia
Oscar Danilo Montoya: Grupo de Compatibilidad e Interferencia Electromagnética, Facultad de Ingeniería, Universidad Distrital Francisco José de Caldas, Bogotá 110231, Colombia
Carlos Restrepo: Department of Electrical Engineering, Universidad de Talca, Curicó 3340000, Chile
Javier Muñoz: Laboratorio Inteligente de Energía, Facultad de Ingeniería, Universidad Tecnológica de Bolívar, Cartagena 131001, Colombia

Mathematics, 2022, vol. 10, issue 22, 1-15

Abstract: This paper presents an adaptive control to stabilize the output voltage of a DC–DC boost converter that feeds an unknown constant power load (CPL). The proposed controller employs passivity-based control (PBC), which assigns a desired system energy to compensate for the negative impedance that may be generated by a CPL. A proportional-integral (PI) action that maintains a passive output is added to the PBC to impose the desired damping and enhance disturbance rejection behavior, thus forming a PI+PBC control. In addition, the proposed controller includes two estimators, i.e., immersion and invariance (I&I), and disturbance observer (DO), in order to estimate CPL and supply voltage for the converter, respectively. These observers become the proposed controller for an adaptive, sensorless PI+PBC control. Phase portrait analysis and experimental results have validated the robustness and effectiveness of the adaptive proposed control approach. These results show that the proposed controller adequately regulates the output voltage of the DC–DC boost converter under variations of the input voltage and CPL simultaneously.

Keywords: passivity-based control; Hamiltonian function; asymptotic stability convergence; sensorless control design; adaptive control design; unknown constant power load (search for similar items in EconPapers)
JEL-codes: C (search for similar items in EconPapers)
Date: 2022
References: View references in EconPapers View complete reference list from CitEc
Citations: View citations in EconPapers (1)

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