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At present, high impedance faults (HIF) on distribution networks still present the most persistent and challenging problem to protection engineers. This is because this fault type does not produce a fault current large enough to be detectable by conventional protection devices such as over-current relays, reclosers or fuses. Prolonged arcing and flashing at the point of contact due to HIF presents...
Under severe fault conditions the core of a current transformer can saturate and the transformer output current is then no longer linearly related to the measured current. Digital relays may then fail to command breakers to open, thereby leading to dangerous or destructive overcurrents. In this paper, a compensation technique is proposed that utilises the Jiles-Atherton model to reproduce the primary...
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