par Bustamante Mparsakis, Xavier ;Maun, Jean Claude
Référence IPST2017(29 June 2017: Seoul Korea), International Conference on Power Systems Transients
Publication Publié, 2017-06-26
Publication dans des actes
Résumé : Travelling Waves (TWs) are electro-magnetic transients that are generated when there is a sudden change of voltage in the network, such as when a fault occurs. Fault locators based on TWs have recently emerged as an alternative to typical impedance fault locators thanks to their higher precision in most cases. The development of new algorithms based on TWs is improved by the understanding of their behaviors, in particular with the analysis of high frequency records of faults. Such records are not readily available. We performed a measurement campaign in the Belgian transmission network to acquire records of TWs generated when faults occur. This paper reports the experience acquired during the campaign, and discusses fault location algorithm improvements to account for the unique topology of the monitored line. The algorithm improvement reduces the error caused for non-homogeneous lines, which can be significant for big lines. The records analysis showed three important factors that influence the shape of the recorded TWs: the discontinuity in the line caused by a T-junction, the bandwidth of the measurement transformers, and the secondary cables connected to the current transformers. Therefore, those effects should be carefully considered when developing new algorithms based on TWs.