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This paper analyses the performance of the distributed generator frequency protection if the time required for islanding detection (this is the utility anti-islanding requirement) is increased. Such analysis considers synchronous generators and three types of frequency-based relays: vector surge, rate of change of frequency and under/over frequency relays. Moreover, the concept of performance curves...
The performance characteristics of rate of change of frequency (ROCOF) relays for embedded generation islanding detection are investigated. The concepts of detection-time versus power-imbalance curve and critical power imbalance are proposed. These concepts are employed to determine the factors that may affect the islanding detection capability of ROCOF relays. The factors analysed are voltage-dependent...
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