• Citer

Precise Impedance Based Fault Location Algorithm with Fault Resistance Seperation

par Washer, Marie;Maun, Jean Claude ;Dzienis, Cezary;Kereit, Matthias;Yelgin, Yilmaz
Référence PowerTech Eindhoven 2015(29 June- 2 July 2015: Eindhoven), PowerTech Eindhoven 2015
Publication Publié, 2015-06-29

Publication dans des actes

• Accès en ligne
• Détails
• Contenu
• Statistiques

Résumé :

The reactance method with fault resistance separation has been developed in order to determine as precisely as possible the value of a faulty loop’s impedance in transmission or distribution power system line. This method has commonly been used for impedance calculation in case of a single phase-to-earth fault in diverse power system protection applications. New developments in this area have shown that the extension of the method to multi-phase faults is not only possible but also of practical relevance. However, all previous investigations focused on impedance calculation using data from one single side of the power system line. Due to missing data from the remote end, the determined impedance value can deviate from its actual value. This research consists in an improvement of this calculation method using data from both the own and the remote line end. This approach uses communication between two measurement units e.g. protection relays, which have the advantage of not requiring a precise synchronization with each other. The additional time invariant parameters of the power system, acquired by each device and transferred to the remote end, allows an exact computation of the fault reactance as well as fault resistance. In this paper, the derivation of this novel approach as well as experimental results in a fault location application are presented.