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A circuit-breaker restrike diagnostic algorithm using ATP and wavelet transforms

Kam, Shui-Cheong, Nielsen, Shawn, & Ledwich, Gerard (2011) A circuit-breaker restrike diagnostic algorithm using ATP and wavelet transforms. In Integrating Renewables into the grid : Universities Power Engineering Conference, 2011 (AUPEC 2011), 25-28 September 2011, Queensland University of Technology, Brisbane, Queensland. (In Press)

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    Abstract

    Circuit breaker restrikes are unwanted occurrence, which can ultimately lead to breaker. Before 2008, there was little evidence in the literature of monitoring techniques based on restrike measurement and interpretation produced during switching of capacitor banks and shunt reactor banks. In 2008 a non-intrusive radiometric restrike measurement method, as well a restrike hardware detection algorithm was developed. The limitations of the radiometric measurement method are a band limited frequency response as well as limitations in amplitude determination. Current detection methods and algorithms required the use of wide bandwidth current transformers and voltage dividers. A novel non-intrusive restrike diagnostic algorithm using ATP (Alternative Transient Program) and wavelet transforms is proposed. Wavelet transforms are the most common use in signal processing, which is divided into two tests, i.e. restrike detection and energy level based on deteriorated waveforms in different types of restrike. A ‘db5’ wavelet was selected in the tests as it gave a 97% correct diagnostic rate evaluated using a database of diagnostic signatures. This was also tested using restrike waveforms simulated under different network parameters which gave a 92% correct diagnostic responses. The diagnostic technique and methodology developed in this research can be applied to any power monitoring system with slight modification for restrike detection.

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    ID Code: 43611
    Item Type: Conference Paper
    Keywords: ATP(Alternative Transient Program), restrike diagnostic algorithm, wavelet transforms
    Subjects: Australian and New Zealand Standard Research Classification > ENGINEERING (090000) > ELECTRICAL AND ELECTRONIC ENGINEERING (090600) > Power and Energy Systems Engineering (excl. Renewable Power) (090607)
    Divisions: Current > Research Centres > CRC Integrated Engineering Asset Management (CIEAM)
    Past > QUT Faculties & Divisions > Faculty of Built Environment and Engineering
    Past > Schools > School of Engineering Systems
    Copyright Owner: Copyright 2011 please consult authors
    Deposited On: 27 Jul 2011 12:00
    Last Modified: 27 Jul 2011 12:03

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