摘要:The performances of the conventional currentregulated voltagecontrolled system with bipolar PWM are first analyzed in detail

then a novel control scheme suitable for highpower highperformance AC power supplies is present in this paper

which incorporates dual synchronous PWM technique of singlephase fullbridge inverter and multiple feedback loop. With this scheme

the output voltage of AC power supply can maintain highquality sine wave at low switching frequency and small output LC filter parameters. Moreover

it has excellent voltage regulation performance

fast dynamic response

good disturbance rejection

high nonlinear load compatibility

and small voltage modulation value. The validity of the proposed control scheme has been verified on a singlephase 30 kVA experimental prototype.