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The summary form only given. Power-line-signaling-based schemes are regarded as promising solutions to the problem of anti-islanding protection of distributed generators (DGs). These schemes broadcast dedicated signals from the distribution substation to the downstream DGs and, therefore, transform the detection of islanded DGs into the determination of the signal presence at the DG sites. This paper...
This paper presents a study about the impact of different inverter interface controls on the steady-state stability of inverter-based distributed generators (DG) in the presence of positive feedback anti-islanding schemes. The impact of the constant power controller and the constant current controller on the DG system steady-state stability is compared. The Sandia frequency shift (SFS) anti-islanding...
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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