Research on photovoltaic dual frequency grid-connected inverter based on one-cycle control

A novel grid-connected dual frequency inverter for photovoltaic generation is proposed.The inverter consists of two cascaded standard half bridges,one of the half bridges works in high frequency to improve the performance of output current and the other one works in low frequency to handle power thereby the switching losses can be reduced and the system efficiency can be improved.For the high frequency half bridge,the one-cycle control is adopted.The simulation results illustrate that the inverter is controlled to generate the output current in phase with the grid voltage with low harmonic distortion and better dynamic performance.