Directional Traveling-Wave Protection Based on Slope Change Analysis

This paper presents a new approach that deduces the fault direction based on the traveling-wave directional principle. The algorithm by means of wavelet transforms decomposes the voltage signals and calculates the spectral energy at selected detail which allows detecting the fault and to choose the...

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Bibliographic Details
Published in:IEEE transactions on power delivery 2007-10, Vol.22 (4), p.2025-2033
Main Authors: Aguilera, C., Orduna, E., Ratta, G.
Format: Article
Language:English
Subjects:
Algorithm design and analysis
Algorithms
Applied sciences
Change detection algorithms
Directional traveling wave
Disturbances. Regulation. Protection
Electric potential
Electrical engineering. Electrical power engineering
Electrical power engineering
Exact sciences and technology
Fault detection
Faults
Phase detection
Phase transformations
Polarity
Power networks and lines
Protection
Protective relaying
Relaying
Signal analysis
Spectra
transmission-line protection
Voltage
Wavelet analysis
Wavelet transforms
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Description
Summary:This paper presents a new approach that deduces the fault direction based on the traveling-wave directional principle. The algorithm by means of wavelet transforms decomposes the voltage signals and calculates the spectral energy at selected detail which allows detecting the fault and to choose the phase to make the slope change analysis. This analysis provides a clear indication of fault direction from the comparison of the slope change polarities of the voltage and current at selected phase during quite a short time. The algorithm, which belongs to the ultra-high-speed protecting relaying, is able to discriminate the direction for all kinds of faults and is not affected by the change of the fault angle inception.
ISSN:0885-8977
1937-4208
DOI:10.1109/TPWRD.2007.899519