An automatic system to locate phase-to-ground faults in medium voltage cable networks based on the wavelet analysis of high-frequency signals

The paper presents a microcontroller-based automatic system that applies the continuous wavelet analysis to the measured fault-originated electromagnetic transients in order to locate phase-to-ground faults in power distribution networks composed by coaxial cables. The paper describes the numerical procedure conceived to: (i) detect the presence of fault-originated transients superimposed to steady-state voltage waveforms, (ii) identify the faulted phase-conductor and (iii) identify the part of the fault transient that can be used to build a specific mother wavelet so to improve the fault location accuracy. The paper also describes the implementation of the procedure into an embedded microcontroller as well as its experimental validation carried out by means of analog real-time generated fault waveforms obtained from EMTP simulations. © 2011 IEEE.

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2011 IEEE PES Trondheim PowerTech: The Power of Technology for a Sustainable Society, POWERTECH 2011, null, null, null
Department of Electrical Engineering, University of Bologna, Bologna, Italy, Conference code: 86744, Export Date: 25 April 2012, Source: Scopus, Art. No.: 6019280, doi: 10.1109/PTC.2011.6019280, Language of Original Document: English, Correspondence Address: Paolone, M.; Department of Electrical Engineering, University of Bologna, Bologna, Italy; email:, References: Radial distribution test feeders (1991) IEEE Trans. Power Syst., 6 (3), pp. 975-985. , IEEE Distribution Planning Working Group, Aug; (1998) CIRED WG03 Fault Management, , Fault Management in Electrical Distribution Systems; (2004) IEEE Guide for Determining Fault Location on AC Transmission and Distribution Lines, , IEEE Std C37.114; Sachdev, M.S., Agarwal, R., TECHNIQUE FOR ESTIMATING TRANSMISSION LINE FAULT LOCATIONS FROM DIGITAL IMPEDANCE RELAY MEASUREMENTS. 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Scopus: 2-s2.0-80053376365

 Record created 2012-05-01, last modified 2018-09-13

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