Fault in Transmission Cables and Current Fault Location Methods

Jensen, Christian Flytkjær

doi:10.1007/978-3-319-05398-1_2

Cited by 7 publications

(2 citation statements)

References 46 publications

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“…The conventional traveling wave-based method has good performance in the power system with a simple structure as its wave propagation process is predictable. However, for mixed transmission lines, the traveling wave has different velocities in overhead lines and underground cables, and the superimposed scenario is also a major interference for the capture of arrival wavefronts [6][7][8].…”

Section: Introductionmentioning

confidence: 99%

A novel fault location algorithm for mixed overhead‐cable transmission system using unsynchronized current data

Ding

Wang

Zheng

et al. 2019

IEEJ Transactions Elec Engng

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The characteristic impedance value of the overhead line is different from that of the underground cable. Existing traveling wave‐based fault location methods for mixed power transmission systems have setbacks including location error caused by wave velocity and difficulty in detecting wave arrival time. In order to solve these problems, the increase of available information from different locations by installing wire‐based sensors along the power line is a feasible solution. In this paper, a traveling wave‐based fault location system, which is based on the current data measured at the midpoint of the overhead line and the joint point, is introduced. The data at these two locations are measured by the wire‐based current sensor we designed. The whole transmission line system is divided by these two sensors into three segments. The first step of this proposed method is to record the postfault current data at the two measuring devices. Second, by comparing the amplitudes and polarities of the current at these two measurement points, the faulty segment can be identified. Finally, postfault wave propagation paths are ascertained; the accurate velocity values of the waves in the overhead line and underground cable are obtained; and then, the fault point is located without the need of time synchronization. © 2019 Institute of Electrical Engineers of Japan. Published by John Wiley & Sons, Inc.

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Section: Introductionmentioning

confidence: 99%

A novel fault location algorithm for mixed overhead‐cable transmission system using unsynchronized current data

Ding

Wang

Zheng

et al. 2019

IEEJ Transactions Elec Engng

View full text Add to dashboard Cite

show abstract

“…Fault location problems become more complicated in multi-terminal hybrid transmission lines, especially for hybrid lines with overhead lines and cables, where the discontinuities in the wave impedance at the joint node need to be considered. According to [31], the implementation of fault location methods is restricted because the fault loop impedance does not linearly depend on the fault location, and additional reflections are created at the joint node. Moreover, the velocity of the traveling wave, which is an important propagation parameter, varies in lines and cables.…”

mentioning

confidence: 99%

Location of Faulty Section and Faults in Hybrid Multi-Terminal Lines Based on Traveling Wave Methods

Ning

Wang

et al. 2018

Energies

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Traveling-wave-based fault location methods are widely used for modern power systems owing to their high accuracy on two-terminal lines. However, they perform poorly on hybrid multi-terminal lines. Many traveling-wave-based methods have been developed recently to solve this problem, but they have high computational burdens and complex fault location procedures. To tackle this challenge, a new fault location method is presented in this paper. First, to ensure that the implementation of the proposed method is not affected by different line parameters, a normalization algorithm is used for hybrid multi-terminal lines, which consist of overhead lines and cables. To reduce the complexity, a novel fault section identification method that depends only on the first three arrival times is applied to separate a three-terminal fault section from the multi-terminal lines. Consequently, the fault can be located using a corresponding two-terminal fault location method in this fault section. To verify its effectiveness, fault case studies and performance evaluations are performed in the PSCAD and MATLAB/Simulink environment. The simulation results reveal that the proposed method can correctly identify the fault section and accurately locate the faults, which is simple and suitable for hybrid multi-terminal lines.Energies 2018, 11, 1105 2 of 18 matrix models for unbalanced three-phase line is described to analyse ground fault current and also to handle unsymmetrical faults with hybrid compensation for microgrid distribution systems. However, there are major errors in impedance-based fault location, mainly caused by fault resistance, line asymmetry, capacitive effect, or current transformer saturation [15]. Thus, traveling-wave-based methods have been widely used to avoid these drawbacks. The traveling-wave fault location methods based on transient-state analysis are more accurate than the impedance-based methods, because the accuracy of the former depends mainly on the sampling rates of the data acquisition system [16]. With the application of high-frequency transient recorders (TRs), traveling-wave methods have become more widely used in practice [17]. Different fault detection methods and their impact are reviewed in terms of protection performance in [18]. Wavelet transform has proved to be the best option for fault detection. In the traveling-wave methods, discrete wavelet transformation (DWT) is also frequently used to extract fault-induced transient signals. Artificial intelligence-based methods are often used for fault classification [8] and fault section identification. Combined with the relays and protection, an application of enhanced honey-bee mating optimization is proposed to solve the fault section estimation in [19].Among the traveling-wave-based methods, the classical one-terminal method requires the identification of the traveling wave from the fault point [20], which is difficult to perform, particularly for multi-terminal lines. In [21], a classical two-terminal fault location method is presented where the mea...

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Protection scheme for hybrid transmission system using fuzzy inference system and microcontroller

2020

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Fault in Transmission Cables and Current Fault Location Methods

Cited by 7 publications

References 46 publications

A novel fault location algorithm for mixed overhead‐cable transmission system using unsynchronized current data

A novel fault location algorithm for mixed overhead‐cable transmission system using unsynchronized current data

Location of Faulty Section and Faults in Hybrid Multi-Terminal Lines Based on Traveling Wave Methods

Protection scheme for hybrid transmission system using fuzzy inference system and microcontroller

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