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Preprint / ENY-PREPRINT-2013-013

Error Compensation in Distance Relays Caused by Wind Power Plants in the Power Grid

Trujillo, L (Universidad Autónoma de Nuevo León, Mexico) ; Conde, A (Universidad Autónoma de Nuevo León, Mexico) ; Leonowicz, Z (Wroclaw University of Technology, Poland)


Abstract: This article presents the Prony method as a filtering technique for distance relays. First, the effect of non-filtered frequency components generated by Wind Power Plants in distance relays is evaluated in a simplified model of a doubly fed induction generator, resulting in an error of apparent impedance measurement. Then, the effects of non-filtered frequency components for typical distance relay are presented. The error in apparent impedance measurement is evaluated in reach and operation time of the relay; a distorted characteristic of the mho distance relay is shown in the impedance plane. Finally, Prony method as a filtering technique is implemented as a solution of the apparent impedance measurement error, and the simulated case and a real fault event are evaluated to validate the proposed distance relay algorithm. Thus the asynchronous frequency components of voltage and current signals are identified and filtered, as a result the performance of the distance relay is enhanced.

Keyword(s): wind power plant ; Prony method ; distance relay ; protective relays
Note: Preprint published in Electric Power Systems Research, Volume 106, January 2014, Pages 109–119

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Rekord stworzony 2013-09-18, ostatnia modyfikacja 2013-09-19

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