Digitally simulated test performance of the Pramod scheme for UHS protection of EHV transmission lines

The author describes a digital simulation technique for the signal processing of the Pramod scheme and studies the digitally simulated test performance of the scheme for satisfactory operation under different fault conditions. The Pramod scheme is based on the detection of high-frequency voltage signals through stack tuners. It is assumed that the digitally simulated stack tuner output signals are available for the purpose of the signal processing under different fault conditions. The Pramod scheme has been investigated for the discrimination feature of reverse fault, faults at different points of the transmission line, and different types of faults, and the performance has been found satisfactory