In order to save energy

single-stage high- frequency link DC-AC converters are becoming more and more important in distributed power systems. The traditional control scheme has high peak inductor current during operation and complex current stress optimization function. For this reason

this paper proposes a current stress optimization method based on hybrid modulation strategy for single-stage high-frequency link DC-AC converter. First

the AC-side switch is controlled by high and low frequency interleaved control

which can reduce the number of high-frequency power devices and thus reduce the system switching loss. Then

the extended phase shift (EPS) modulation is divided into operating modes and the external mode is selected for the optimization solution. Combining EPS modulation

pulse width modulation and switching frequency modulation

thus forming a linear power control

greatly simplifies the complexity of controller design. In addition

a current stress optimization control method is designed and the soft-switching implementation conditions of all switching tubes are analyzed. Finally

the effectiveness of the proposed control method is verified by a 500 W experimental prototype.