A Novel Traveling Wave Based Differential Protection for Distributed Parameter Line

Cai, Jiali; Ha, Hengxu; Yu, Yang; Bo, Z.Q.; Chen, Bin

doi:10.1109/appeec.2011.5748466

Cited by 2 publications

(2 citation statements)

References 19 publications

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“…Reference [20] uses the measured current as the restrained value, so the sensitivity is severely affected by the load. Reference [21] uses low sampling frequency, making concession to operation speed. Also, this scheme is likely to be affected by CT saturation.…”

Section: Introductionmentioning

confidence: 99%

A New Differential Protection of Transmission Line Based on Equivalent Travelling Wave

Tang

Xiang

Luo

et al. 2017

IEEE Trans. Power Delivery

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Differential protection is widely used for transmission lines, but its performance is affected by distributed capacitance current and current transformer (CT) saturation. Travelling wave (TW) differential protection is immune to these factors and can achieve ultra-high-speed operation. These characteristics are essential for long-distance extra/ultra-high-voltage (EHV/UHV) transmission line protection. However, the contradiction between sampling frequency and communication traffic makes it hard to ensure high sensitivity and high reliability at the same time. To solve this problem, a new TW differential protection based on equivalent travelling wave (ETW) is proposed in this paper. Wavelet transform is adopted to extract wavelet transform modulus maxima (WTMM) of TW, which are used to reconstruct ETW. Only several WTMMs need to be exchanged with the opposite terminal, so the amount of communication is largely reduced. Current energy ratio is defined and used for operation criterion to enhance the sensitivity during faults with large fault resistance and small fault inception angle. Detailed discussions on the selection of setting value ensure the reliability of the proposed protection scheme. Extensive simulations are conducted to test the performance of the protection. Simulation results verify that the protection can correctly discriminate between internal and external faults with high sensitivity and reliability.

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Section: Introductionmentioning

confidence: 99%

A New Differential Protection of Transmission Line Based on Equivalent Travelling Wave

Tang

Xiang

Luo

et al. 2017

IEEE Trans. Power Delivery

View full text Add to dashboard Cite

show abstract

“…These methods are classified into three categories: frequency‐domain based compensation methods, time‐domain based compensation methods and travelling wave differential protection. Time‐domain or frequency‐domain based compensation methods usually utilise a lumped parameter model to calculate capacitive charging current [2, 3] and subtract it from the differential current, whereas travelling wave differential protection constitutes the protection criterion by fault travelling waves which essentially take capacitive charging current into account [4, 5].…”

Section: Introductionmentioning

confidence: 99%

Impedance‐based pilot protection for ultra‐high‐voltage/extra‐high‐voltage transmission lines

Lei

Xiang

Shi

et al. 2018

J. eng.

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A Novel Traveling Wave Based Differential Protection for Distributed Parameter Line

Cited by 2 publications

References 19 publications

A New Differential Protection of Transmission Line Based on Equivalent Travelling Wave

A New Differential Protection of Transmission Line Based on Equivalent Travelling Wave

Impedance‐based pilot protection for ultra‐high‐voltage/extra‐high‐voltage transmission lines

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