This paper analyzes a bidirectional, isolated boost topology that is used as the battery charger/discharger in a photovoltaic generator interface converter with built-in energy storage. The converter interfaces a 48V; 6kWh lead acid battery stack to a 400V dc bus, and is designed for a 1:5kW peak power. The steady-state circuit analysis is presented and a possible design procedure for the power stage is derived. Experimental results from a prototype of the converter are presented, showing a 96% peak efficiency at 1kW, in both charging and discharging operation modes.
High Efficiency Battery Charger for Photovoltaic Inverters
G. Spiazzi;S. Buso;D. Biadene
;
2017
Abstract
This paper analyzes a bidirectional, isolated boost topology that is used as the battery charger/discharger in a photovoltaic generator interface converter with built-in energy storage. The converter interfaces a 48V; 6kWh lead acid battery stack to a 400V dc bus, and is designed for a 1:5kW peak power. The steady-state circuit analysis is presented and a possible design procedure for the power stage is derived. Experimental results from a prototype of the converter are presented, showing a 96% peak efficiency at 1kW, in both charging and discharging operation modes.
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