Variable Digital Filter Response Time in a Digital Distance Relay

Abstract

This paper will investigate the effect of digital filtering on the operating time of a generic digital distance relay. Two popular filtering approaches will be considered: the Cosine Filter and the Fourier Filter. The effects of several variables, such as sampling rate, fault location, fault incidence angle, and non-fundamental frequencies, will be discussed. This paper will attempt to discuss the performance of the digital filters in terms familiar to most protection engineers.

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Cite this paper

@inproceedings{Kennedy1996VariableDF, title={Variable Digital Filter Response Time in a Digital Distance Relay}, author={John M. Kennedy and Garrett E. Alexander}, year={1996} }