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The use of power gyrators as DC impedance matching circuits in photovoltaic (PV) systems is investigated. With the aim of maximum power transfer from a PV panel to a DC load, a G-gyrator is designed as a matching power interface with a time-varying adaptive conductance that guarantees the operation at the maximum power point. The adaptive nature of the gyrator conductance is given by an extremum-seeking...
A simple control technique for a three-port DC-DC converter based PV system with storage is presented herein. The controller takes advantage of the fast response and cross coupling characteristics of the selected three port topology itself to obtain transient ride through support from the storage while using traditional control design techniques, e.g. SISO control design and Feedforward compensation...
In this work, a modular structure to implement one-phase photovoltaic inverters for utility grid connection is presented. The proposed structure uses two canonical elements in energy processing, namely, a loss-free resistor (LFR) based on a boost converter and a power gyrator based on a buck converter. An H-bridge stage performs the DC-AC conversion. The LFR performs the DC impedance matching of the...
In this paper, the parallel connection of two power semigyrators of type G with controlled input current is used as an adaptation stage to improve the efficiency and reliability of a photovoltaic power conversion chain. A current sharing control has been incorporated in the system for guarantee the uniform distribution of the total peak power among the dc-dc converters. We use a democratic current...
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