Starter of grid-connected inverter and control method thereof

摘要

A starter of the grid-connected inverter and a control method thereof are disclosed. The starter comprises a controller, and a first switch and a first resistor connected in parallel. The controller includes an input end, and first and second output ends. The input end inspects the DC voltage signal from the inverter. When the DC voltage exceeds a predetermined voltage threshold, the first output end sends a first control signal to turn on the first switch, and the second output end sends a second control signal to make the grid-connected inverter enter into a chopping mode. There is a delay period between the send time of the first control signal and that of the second control signal.

主权项

1. A starter of a grid-connected inverter, comprising a first switch and a first resistor connected in parallel, wherein the first switch is electrically connected between an AC electric grid and a grid-connected inverter, and the starter further comprises:
a controller comprising an input end, a first output end and a second output end, wherein the input end of the controller receives and inspects the DC voltage signal of the inverter, and when the DC voltage exceeds a predetermined voltage threshold, the first output end of the controller sends a first control signal to turn on the first switch, and the second output end outputs a second control signal to make the grid-connected inverter enter into a chopping mode, wherein there is a delay period td1 between the send time of the first control signal and the send time of the second control signal, and td1 is larger than 0.