Travelling-Wave Techniques Applied to the Protection of Teed Circuits:- Principle of Travelling-Wave Techniques

McLaren, P.G.; Shah, Krupa

doi:10.1109/tpas.1985.318908

Cited by 24 publications

(7 citation statements)

References 7 publications

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“…This time is measured at one-end (taking advantage of the wave reflections [31]) or multi-end (analyzing the time differences or the delay between them [32]). Unfortunately, this family poses complications under complex topologies (with many reflections).…”

Section: Fault Location Family Methods Overviewmentioning

confidence: 99%

A Comparison of Impedance-Based Fault Location Methods for Power Underground Distribution Systems

et al. 2016

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Abstract:In the last few decades, the Smart Grid paradigm presence has increased within power systems. These new kinds of networks demand new Operations and Planning approaches, following improvements in the quality of service. In this sense, the role of the Distribution Management System, through its Outage Management System, is essential to guarantee the network reliability. This system is responsible for minimizing the consequences arising from a fault event (or network failure). Obviously, knowing where the fault appears is critical for a good reaction of this system. Therefore, several fault location techniques have been proposed. However, most of them provide individual results, associated with specific testbeds, which make the comparison between them difficult. Due to this, a review of fault location methods has been done in this paper, analyzing them for their use on underground distribution lines. Specifically, this study is focused on an impedance-based method because their requirements are in line with the typical instrumentation deployed in distribution networks. This work is completed with an exhaustive analysis of these methods over a PSCAD TM X4 implementation of the standard IEEE Node Test Feeder, which truly allows us to consistently compare the results of these location methods and to determine the advantages and drawbacks of each of them.

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Section: Fault Location Family Methods Overviewmentioning

confidence: 99%

A Comparison of Impedance-Based Fault Location Methods for Power Underground Distribution Systems

et al. 2016

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“…The first peak times obtained from the faulty bus are used as an input data for travelling wave equation later as in Equation 2. (2) where, d is the fault location measured from the sending end LT is the length of the line which the fault is detected The first peak in the scale 1 at the faulty bus for the signal shown in Fig. 4.…”

Section: Decision Algorithm and Resultsmentioning

confidence: 99%

“…However, there are some factors that can cause a needless operation of the distance protection such as the CTs saturate, the resistances of fault arcs, impedance data and calculation error. In order to prevent false tripping in these cases, several algorithms for using in fault detection and fault location have been developed in order to be employed in the protective relays [1][2][3][4]. In the early 1980's, the most effectiveness technique to locate fault location has been proposed based on travelling wave [1][2][3].…”

Section: Introductionmentioning

confidence: 99%

“…In order to prevent false tripping in these cases, several algorithms for using in fault detection and fault location have been developed in order to be employed in the protective relays [1][2][3][4]. In the early 1980's, the most effectiveness technique to locate fault location has been proposed based on travelling wave [1][2][3]. During the 1990's, the development in the algorithm for locate of the faults on the transmission lines with the wavelet transform was initially proposed by F. H. Magnago et al [4].…”

Section: Introductionmentioning

confidence: 99%

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Application of discrete wavelet transforms for fault location on transmission network systems

Pothisarn

Ngaopitakkul

2009

8th International Conference on Advances in Power System Control, Operation and Management (APSCOM 2009)

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This paper proposes a technique to identify locations of fault along the transmission network systems using Discrete Wavelet Transforms (DWT). The maximum coefficients of the positive sequence current obtained from all buses are compared in order to detect the faulty bus on a transmission network and the first peak times obtained from the faulty bus are used as an input data for travelling wave equation. The proposed method gives a satisfactory accuracy, and will be very useful in the development of a modern protection scheme for electrical power transmission network systems.

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“…Precise protection schemes have to be developed, particularly in fault detection and fault location on the transmission lines. Several algorithms for fault detection and fault location have been developed for the protective relays [1–15] but these algorithms use different solutions and techniques. The most effective technique for identifying fault location, which is based on traveling waves, has been proposed in several papers in the 1980s [1–3].…”

Section: Introductionmentioning

confidence: 99%

Surface photografting polymerization of vinyl acetate, maleic anhydride, and their charge‐transfer complex. IX. Charge‐transfer complex (5)

Deng

Yang

2005

J of Applied Polymer Sci

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The two‐step method was employed to obtain insight into the grafting mechanism of (MAH‐VAC)/LDPE film in the preceding investigation, where photoreduction of BP (the first step) was investigated and the subsequent grafting polymerization (the second step) was studied from the viewpoint of kinetics. The present article is devoted to investigation of the living polymerization performance, the compositions of the grafted chains, and the relevant grafting copolymerization mechanism of the (MAH‐VAC)/LDPE system. Both grafting copolymerization and nongrafting copolymerization performed living polymerization characteristics to some degree. Regarding the nongrafting copolymerization at a monomer concentration, [MAH] = [VAC] = 2M, MAH and VAC mainly underwent alternating copolymerization, especially at low temperatures; however, the grafting copolymerization mostly exhibited random copolymerization, which became obvious with the elevation of temperature. The composition of the monomer feed largely affected the composition of the grafted copolymer and the nongrafted copolymer. When [MAH]/[VAC] was either 2.5/1.5, 2/2, or 1.5/2.5, MAH/VAC in nongrafted copolymers stayed approximately at 1/1; while when [MAH]/[VAC] was 2.5/1.5, MAH/VAC in the grafted copolymer was nearly 1/1; but in the case of [MAH]/[VAC] being 2/2 and 1.5/2.5, the content of MAH in grafted chains was somewhat lower than that of VAC. All these results demonstrated that the grafting copolymerization on the substrate occurred randomly, which was greatly affected by the affinity of the monomer toward the substrate. This performance of the grafting copolymerization was much different from the nongrafting copolymerization in the solution. © 2005 Wiley Periodicals, Inc. J Appl Polym Sci 97: 2230–2237, 2005

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Travelling-Wave Techniques Applied to the Protection of Teed Circuits:- Principle of Travelling-Wave Techniques

Cited by 24 publications

References 7 publications

A Comparison of Impedance-Based Fault Location Methods for Power Underground Distribution Systems

A Comparison of Impedance-Based Fault Location Methods for Power Underground Distribution Systems

Application of discrete wavelet transforms for fault location on transmission network systems

Surface photografting polymerization of vinyl acetate, maleic anhydride, and their charge‐transfer complex. IX. Charge‐transfer complex (5)

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