Hysteresis control method for inverter and an inverter with hysteresis control

An inverter with hysteresis control, wherein the inverter comprises:

• an main power circuit with an input and an output, wherein the input is electrically connected to a DC bus, and the output is electrically connected to a power grid;
• a control module electrically connected to the main power circuit and configured to control the main power circuit to implement energy conversion from the input to the output, wherein the control module further comprises:
• a sampling unit configured to sample a grid voltage Vg(z) and an output current Ig(z) of the inverter;
• a bandwidth calculation unit configured to calculate a present period hysteresis bandwidth H(z) based on the grid voltage Vg(z);
• a bandwidth prediction unit configured to predict a next period hysteresis bandwidth H(z+1);
• a correction unit configured to obtain a final hysteresis bandwidth Hout(z) by correcting the present period hysteresis bandwidth H(z) based on the next period hysteresis bandwidth H(z+1);
• a main control unit configured to output a driving signal according to the output current Ig(z) and the final hysteresis bandwidth Hout(z) to control operation of the main power circuit.