| 摘要 |
<p>The present invention relates to an AFD islanding detection module for a photovoltaic power generation inverter system and an AFD islanding detection method using the same. The AFD islanding detection module for the photovoltaic power generation inverter system according to the embodiment of the present invention includes a detecting unit (110) which detects a positive half-period frequency and a negative half-period frequency according to the output current of first and second photovoltaic power generation inverters, a determining unit (120) which determines the zero-crossing state of the output voltage of the first and second photovoltaic power generation inverters, a frequency chopping supplying unit (130) which supplies different frequency chopping fractions to the output currents of the first and second photovoltaic power generation inverters, an operating unit (140), a determination index producing unit (150), a comparing unit (160) and a control unit (170). The present invention quickly detects the islanding.</p> |
