Evaluation of chirp detector-based travelling wave localization of earth faults in MV networks

N. I. Elkalashy, N. G. Tarhuni, A. M. Elhaffar, M. Lehtonen

Research output: Chapter in Book/Report/Conference proceedingConference contribution

2 Citations (Scopus)

Abstract

In this paper, a chirp detector of the current waveforms is evaluated for locating the earth faults in unearthed MV networks where it is used to precisely localize the travelling wave arrival times created by the fault occurrence. Chirp modulation, or linear frequency modulation employs sinusoidal waveforms whose instantaneous frequency increases or decreases linearly over time. These waveforms are commonly referred to as linear chirps or simply chirps. Earth faults in unearthed MV networks will spark a chirp signal which is starting at a high frequency then gradually decreasing to a small frequency. A simple chirp detector is used to demodulate the frequency modulated waveform resulting in a signal peak which is used to locate the fault by a time of arrival method. The evaluation is carried out considering practical modelling of current transformer (CT) where the CT is modelled covering its high frequency characteristics. Also, the network noises are added to the simulated current waveforms. The simulation is performed in the ATP/EMTP program where it is pre-processed using ATPDraw.

Original languageEnglish
Title of host publication10th IET International Conference on Developments in Power System Protection, DPSP 2010 - Managing the Change
Volume2010
Edition558 CP
DOIs
Publication statusPublished - 2010
Event10th IET International Conference on Developments in Power System Protection, DPSP 2010 - Manchester, United Kingdom
Duration: Mar 29 2010Apr 1 2010

Other

Other10th IET International Conference on Developments in Power System Protection, DPSP 2010
CountryUnited Kingdom
CityManchester
Period3/29/104/1/10

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Keywords

  • Earth Fault location
  • frequency modulation
  • travelling waves

ASJC Scopus subject areas

  • Electrical and Electronic Engineering

Cite this

Elkalashy, N. I., Tarhuni, N. G., Elhaffar, A. M., & Lehtonen, M. (2010). Evaluation of chirp detector-based travelling wave localization of earth faults in MV networks. In 10th IET International Conference on Developments in Power System Protection, DPSP 2010 - Managing the Change (558 CP ed., Vol. 2010) https://doi.org/10.1049/cp.2010.0314