Inverter for feeding electrical energy from a photovoltaic unit to a three phase mains has a DC converter with maximum power point tracking control and bridge circuit

摘要

An inverter for feeding electrical energy from a PV unit (2) to a three-phase mains (3) comprises inlet (4a,b) and outlet (5a,b,c) connections and an MPP-tracking controlled DC converter (7), bridge circuit (10) control unit (11) and switches. The converter supplies current to the bridge and the control has a switching frequency corresponding to the mains.