Protection function of photovoltaic grid-connected inverter

　　 1. Anti-islanding effect protection The grid-connected inverter should have reliable and complete unplanned islanding protection. #inverter 48v The grid-connected inverter's anti-unplanned islanding function should have both active and passive islanding detection schemes. #inverter 6000w If an unplanned islanding effect occurs, the inverter should stop supplying power to the grid within 2s, and send an alarm signal at the same time.

2. Restoration of grid-connected protection. #inverter 5kw After the grid-connected inverter stops supplying power to the grid due to a grid fault, the grid-connected inverter should be able to automatically re-transmit to the grid 20s to 5 minutes after the voltage and frequency of the grid return to the normal range. When power is transmitted, the output power should be increased slowly, and the power grid should not be impacted.

　　 3. AC side overcurrent protection The AC output side of the grid-connected inverter should be equipped with overcurrent protection. When a short circuit on the grid side is detected, the grid-connected inverter should stop supplying power to the grid within 0.1s and send a warning signal at the same time. After troubleshooting, the grid-connected inverter should work normally.

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3000w 12v 120v pure sine wave inverter