Fault location using wavelets

Magnago, Fernando; Abur, Ali

doi:10.1109/61.714808

Cited by 511 publications

(184 citation statements)

References 10 publications

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“…5, illustrates the step-by-step fault-location procedure proposed in this study. As can be seen, the proposed procedure, similarly to other methods proposed in the literature (e.g., [8], [9]), requires the knowledge of the network topology as well as its parameters. Such knowledge is used to build a corresponding network model where the lines are represented, for instance, by using constant-parameters line models [31].…”

Section: Time-domain Emtr-based Fault-location Algorithmmentioning

confidence: 99%

An efficient method based on the electromagnetic time reversal to locate faults in power networks

Razzaghi

Lugrin²,

Mahmoudimanesh³

et al. 2014

2014 IEEE PES General Meeting | Conference &Amp; Exposition

114

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Abstract-This paper presents a new method based on the electromagnetic time-reversal (EMTR) theory for locating faults in power networks. The applicability of the EMTR technique to locate faults is first discussed. Using the classical transmission-line equations in the frequency domain, analytical expressions are derived to infer the location of the fault. The accuracy of the proposed method is then discussed in relation to the number of observation points adopted to record the fault-originated electromagnetic transients. Then, this paper illustrates the extension of the proposed method to the time domain. The experimental validation of the proposed method is presented by making reference to a reduced-scale coaxial cable system where real faults are hardware-emulated. Finally, the application of the proposed EMTRbased fault-location method to Electromagnetic Transients Program-simulated cases is presented. The simulated test cases are: a mixed overhead/coaxial cable transmission system and the IEEE 34-bus distribution test feeder. Compared to other transient-based fault-location techniques, the proposed method presents a number of advantages, namely, its straightforward applicability to inhomogeneous media (mixed overhead and coaxial power cable lines), the use of a single observation (measurement) point, and robustness against fault type and fault impedance.

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Section: Time-domain Emtr-based Fault-location Algorithmmentioning

confidence: 99%

An efficient method based on the electromagnetic time reversal to locate faults in power networks

Razzaghi

Lugrin²,

Mahmoudimanesh³

et al. 2014

2014 IEEE PES General Meeting | Conference &Amp; Exposition

114

View full text Add to dashboard Cite

show abstract

“…The benefits of applying wavelet transform in fault location of power system have already been recognized by many researchers [5][6][7][8][9][10][11][12]. However, the wavelet transform itself has limitations for accurate fault location because there are many irregular waveforms in measured original signal.…”

Section: Introductionmentioning

confidence: 99%

Development of Fault Location Algorithm and Its Verification Experiments for HVDC Submarine Cables

Jung¹,

Park²,

Kang³

et al. 2012

Journal of Electrical Engineering and Technology

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-A new fault location algorithm based on stationary wavelet transform and its verification experiment results are described for HVDC submarine cables in this paper. For wavelet based fault location algorithm, firstly, 4th level approximation coefficients decomposed by wavelet transform function are superimposed by correlation, then the distance to the fault point is calculated by time delay between the first incident signal and the second reflected signal. For the verification of this algorithm, the real experiments based on various fault conditions and return types of fault current are performed at HVDC submarine cable test yard located in KEPCO(Korea Electric Power Corporation) Power Testing Center of South Korea. It proves that the fault location method proposed in this paper is very simple but very quick and accurate for HVDC submarine cable fault location.

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“…Existing approaches are based on the detection of wave fronts generated by DC fault using wavelet transformation [5][6][7]. Due to the complex propagation of fault current and voltage waves in meshed HVDC networks an universal fault detection method based on this principle is difficult to implement and has not been published yet.…”

Section: Introductionmentioning

confidence: 99%

Non-telecommunication based DC line fault detection methodology for meshed HVDC grids

Marten¹,

Troitzsch²,

Westermann³

2015

11th IET International Conference on AC and DC Power Transmission

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One of the most challenging aspects regarding realisation of meshed high-voltage direct current (HVDC) systems is the handling of DC line faults. Due to the specific DC fault current phenomena, AC fault detection and clearance methods are not applicable in meshed HVDC grids. New fault clearing algorithms and equipment need to be developed. Therefore it is necessary to be aware of the DC fault current characteristics. Starting from a travelling wave approach simplifications for fault currents in low -and high impedance earthed DC grids are derived. On this basis, a non-telecommunication based DC fault detection algorithm is designed. Due to its decentralised implementation, it is very fast acting, reliable and economic in comparison with centralised approaches which are characterised by a parallel telecommunication system. Furthermore it is able to detect pole to pole as well as pole to earth faults in low-and high-impedance earthed DC grid. Finally this fault detection algorithm is validated by numerical case studies.

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Fault location using wavelets

Cited by 511 publications

References 10 publications

An efficient method based on the electromagnetic time reversal to locate faults in power networks

An efficient method based on the electromagnetic time reversal to locate faults in power networks

Development of Fault Location Algorithm and Its Verification Experiments for HVDC Submarine Cables

Non-telecommunication based DC line fault detection methodology for meshed HVDC grids

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