Abstract:Inadvertent islanding causes serious problems. For these reasons islanding detection is an indispensable feature for distributed generation systems. In this paper, the nondetection zones (NDZs) of over/under voltage (OUV) and over/under frequency (OUF) method are analyzed in ΔP versus ΔQ space. And the Slip-mode frequency shift (SMS) method is discussed. The non-detection zones of the SMS in the Qf versus f0 space is analyzed. In order to overcome the disadvantage of SMS, an adaptive sliding-mode frequency shi… Show more
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