Based on grid-tie and grid-off single phase full bridge inverter

a large signal fast modeling and simulation method for single phase DC/AC inverters is proposed. Large signal mathematical model for loop gain and controller design could be obtained with the proposed theoretic calculation method. The proposed averaging method preserves origin inverter circuit

such as branch middle point and ground point. It helps inner circuitry

terminal voltages and currents to be observed. Therefore

it is very suit for system simulation with multi converters. And it is predicted that the proposed general method is not restricted by inverter topologies and control approaches.