High impedance fault protection in transmission lines using a WPT-based algorithm

•We present a WPT-based method for high impedance fault protection.•The method is insensitive to fault type, location and inception angle.•The algorithm has capability to detect faulted phase.•The method has capability to detect detecting internal and external faults. This paper proposes a new algor...

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Bibliographic Details
Published in:International journal of electrical power & energy systems 2015-05, Vol.67, p.537-545
Main Authors: Mahari, Arash, Seyedi, Heresh
Format: Article
Language:English
Subjects:
Algorithms
Computer simulation
Electric potential
Electric power generation
Faults
High impedance
High impedance fault
High voltages
Pilot protection
Security
Transmission lines
Wavelet packet transform
Zone discrimination
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Summary:•We present a WPT-based method for high impedance fault protection.•The method is insensitive to fault type, location and inception angle.•The algorithm has capability to detect faulted phase.•The method has capability to detect detecting internal and external faults. This paper proposes a new algorithm for High Impedance Fault (HIF) protection, in high voltage transmission lines, with the aid of Wavelet Packet Transform (WPT). The new scheme uses the HIF-induced distortion of voltage and current waveforms to detect HIF and discrimination of the fault location, respectively. The algorithm is based on a recursive method, which adds up the absolute values of high frequency signal coefficients, generated over one last cycle. Application of the proposed algorithm to the pilot protection schemes is also discussed. The proposed method is evaluated by Electro Magnetic Transients Program (EMTP) simulation studies. Several simulations, which are performed using an appropriate HIF model, bring about results which assess the proposed technique accuracy in identifying HIF in overhead transmission lines. A comprehensive simulation study shows the efficiency of the proposed protection scheme from the viewpoints of dependability and security.
ISSN:0142-0615
1879-3517
DOI:10.1016/j.ijepes.2014.12.022