INVERTING APPARATUS AND DETECTION METHOD OF ISLANDING OPERATION
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United States of America Patent
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Issued Date -
Aug 27, 2015
app pub date -
Feb 25, 2015
filing date -
Feb 26, 2014
priority date (Note) -
Abandoned
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Abstract
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.
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