Solar-Generator-Interfacing with a Current-Fed Superbuck Converter Implemented by Duality- Transformation Methods

摘要

Utilization of solar energy is one important action to decelerate the observed climate change and to ensure the availability of energy in the future. Reliable solarenergy systems composing of solar arrays and their interfacing converters are of prime importance but known to have certain operational constraints causing reliability problems. The paper investigates a real current-fed converter for the maximum-power-point (MPP) tracking purposes in solar-generator systems. The current-fed converter is implemented from the conventional voltage-fed converter by applying the duality transformation methods. The investigations show clearly that the inputvoltagecontrolled current-fed converter can operate without constraints in all the regions of solar generator I/U curve but the operation is limited to the voltages lower than the MPP voltage if any output control is used. The theoretical findings are verified with experimental current-fed superbuck converter sourced by a real solar array. Similar information cannot be found from the public literature.