Integration of PV Arrays in DC Power Grids via Unidirectional Boost Converters: a PBC Approach

This paper presents a general control design for photovoltaic systems integrated with Direct-Current power grids by using an unidirectional boost converter. Passivity-based control (PBC) theory is used as a control technique since the dynamical model of the boost converter has an intrinsically port-...

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Bibliographic Details
Published in2018 IEEE 9th Power, Instrumentation and Measurement Meeting (EPIM) pp. 1 - 6
Main Authors Montoya, O. D., Campillo, J. E., Gil-Gonzalez, W., Garces, A.
Format Conference Proceeding
LanguageEnglish
Published IEEE 01.11.2018
Subjects
Boost converter
Control systems
Current control
current control mode
Dynamical systems
Lyapunov stability
Mathematical model
passivity-based control theory
photovoltaic arrays
Photovoltaic systems
Power system stability
Stability analysis
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Summary:This paper presents a general control design for photovoltaic systems integrated with Direct-Current power grids by using an unidirectional boost converter. Passivity-based control (PBC) theory is used as a control technique since the dynamical model of the boost converter has an intrinsically port-Hamiltonian structure, where PBC theory is based upon, to design stable controllers via Lyapunov stability theory. To control the photovoltaic solar system, a current control mode is used, since photovoltaic cells are mathematically modelled as current sources, where the photo-current determined by the solar irradiance and the cell's temperature. Proportional and proportional-integral passivity-based controllers are developed to operate the boost converter under current control mode to extract the maximum power available in the PV array. Simulation results are conducted via MATLAB/ODE-package software.
DOI:10.1109/EPIM.2018.8756428