LCL-T Resonant Converter Based on Dual Active Bridge Topology in Solar Energy Applications

Abstract

Resonant LCL-T converter can operate as stable voltage source, being fed from current, for instance, the photovoltaic battery. It is shown that LCL-T resonant tank has intrinsic ability to convert stable AC current into stable AC voltage thus parametrically regulating output voltage at a fixed value. This mode of operation is made possible by the use of active (synchronous) rectifier to recoup energy from the output back to the LCL-T resonant tank. Basic characteristics of resonant LCL-T converter regulated by phase shift between inverter and rectifier regardless of a solar battery current drift have been defined. It is shown that phase control guarantees 0 voltage and 0 current on switching; however, turn-off current could be substantial. Calculations and assumptions made in this study have been confirmed by simulation and hardware prototype.

A Precise Algorithm for Computing Sun Position on a Satellite

“…Space solar power is the main energy source for a satellite, which is provided by solar arrays at present (Ma 2001;Osipov et al 2017). The amount of energy provided per unit area of a solar array depends on the angle between the normal direction of the solar array and the sun vector (Lin 2010).…”