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Performance of the Pramod Johns scheme for UHS protection of EHV transmission lines under arcing fault conditions

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1 Author(s)
Agrawal, P. ; Power Syst. Consultants, London, UK

The performance of the scheme of Pramod Agrawal (1989) for ultra-high-speed (UHS) protection of EHV transmission lines under arcing fault conditions is described. The arc with reignition effect is modeled, and a method for digital simulation of the superimposed arc voltage is discussed. Simulated tests have shown that the arc voltage has significant higher-frequency components. These tests also confirm that the arcing fault response repeats every half-cycle for a fault inception angle of the voltage from 0 to 90°, which is a significant improvement over schemes based on traveling-wave phenomena which have been considered a failure for faults at 0°C fault inception

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Power Delivery, IEEE Transactions on  (Volume:6 ,  Issue: 1 )