INVERTING APPARATUS AND DETECTION METHOD OF ISLANDING OPERATION

摘要

An inverting apparatus and a detection method of an islanding operation are provided. The inverting apparatus includes an inverting circuit and a control circuit; the inverting circuit is connected to a power grid, wherein the inverting circuit receives a DC input power, and converts the DC input power into an AC output voltage and an AC output current; the control circuit is coupled to the inverting circuit; the control circuit is configured to control the power conversion of the inverting circuit, wherein the control circuit generates a disturbance signal base on a preset time interval to disturb the AC output current generated by the inverting circuit, and detects whether the frequency of the AC output voltage is located within a preset frequency range, so as to decide whether to enable an islanding protection mechanism.

主权项

1. An inverting apparatus, comprising:
an inverting circuit connected to a power grid in parallel, wherein the inverting circuit receives a DC input power, and converts the DC input power into an AC output voltage and an AC output current; and a control circuit coupled to the inverting circuit and configured to control a power conversion of the inverting circuit, wherein the control circuit generates a disturbance signal base on a preset time interval to disturb the AC output current generated by the inverting circuit, and detects whether a frequency of the AC output voltage is located within a preset frequency range, so as to decide whether to enable an islanding protection mechanism.