Passivity-based control for a DC/DC high-gain transformerless boost converter |
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Authors: | Diego Langarica-Cordoba Panfilo R Martinez-Rodriguez Luis H Diaz-Saldierna Jesus Leyva-Ramos David Reyes-Cruz Samuel Iturriaga-Medina |
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Affiliation: | 1. School of Sciences, Autonomous University of San Luis Potosi, San Luis Potosi, Mexico;2. Control and Dynamical Systems Division, Institute for Scientific and Technological Research of San Luis Potosi, San Luis Potosi, Mexico |
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Abstract: | In this work, an adaptive passivity-based controller for a DC-DC high-gain transformerlessdouble-inductor boost converter is fully detailed. The proposed current-mode control scheme results in two feedback loops, a current controller for tracking the inductor current considering damping injection and energy shaping, and a voltage loop composed by a proportional-integral action to guarantee output voltage regulation. Furthermore, a parametric uncertainty estimator using immersion-invariance approach is designed to improve the robustness of the current loop. As a result, a multi-loop adaptive nonlinear energy-based controller, which ensures regional asymptotic stability via Lyapunov analysis is accomplished. In addition, considering practical conditions, real-time numerical simulations, using a 1 kW case-study converter, are carried out in order to assess the effectiveness of the proposed control scheme. Results for output voltage regulation, current tracking, and parametric uncertainty estimation under input voltage and load step changes are shown. |
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Keywords: | DC-DC power converter nonlinear control parameter estimation passivity-based control |
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