A novel transmission line fault detection algorithm based on pilot impedance

Tong, Xiaoyang; Wen, Hao

doi:10.1016/j.epsr.2019.106062

Cited by 20 publications

(9 citation statements)

References 24 publications

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“…To evaluate the effects of the line length and capacitive current on the proposed algorithm, a 50 Hz two-machine system operating at 500 kV is tested in PSCAD/EMTDC and the parameters can be referred from Ref. [35].…”

Section: E Influence Of Outliers and Comparison Workmentioning

confidence: 99%

Waveform Similarity-Based Robust Pilot Protection for Transmission Lines

Zhang

Tong

Hong

et al. 2022

IEEE Trans. Power Delivery

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This paper proposes a robust pilot protection scheme based on waveform similarity that restricts the influence of outliers in fault line identification. By comparing two refactoring currents constructed using the time-domain sampling values of currents at the two terminals of a transmission line, a waveform similarity algorithm called the Kendall's Tau coefficient (KTC) is employed to distinguish two different datasets of a protected transmission line. A reliable fault identification is realized under different fault types, distances, and resistances. Proposed criteria that are robust against to current transformer saturation, synchronization error, and noise are proposed. The KTC is based on simply the rank order instead of the metric value and thus limits outliers to a moderate level, ensuring protection safety in cases where outliers that cannot be eliminated completely are included in the current waveforms. The simulation results demonstrate the excellent performance of the proposed robust pilot protection scheme.

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Section: E Influence Of Outliers and Comparison Workmentioning

confidence: 99%

Waveform Similarity-Based Robust Pilot Protection for Transmission Lines

Zhang

Tong

Hong

et al. 2022

IEEE Trans. Power Delivery

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“…The predicted fault-location error is found to remain far below 1%; hence, this method obviates the need to deal with CT saturation and unreliable zero-sequence parameters of the line. A novel fault detection method is proposed by Tong et al (2020) in [139] for transmission lines, based on pilot impedance method. The authors have shown that the method is insensitive to variation in fault location, fault type, fault resistance and presence of weak source.…”

Section: Correlation-based Analysis Of Fault Signalsmentioning

confidence: 99%

Transmission Line Faults in Power System and the Different Algorithms for Identification, Classification and Localization: A Brief Review of Methods

Mukherjee¹,

Kundu

Das

2021

J. Inst. Eng. India Ser. B

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Transmission lines are one of the most widely distributed engineering systems meant for transmitting bulk amount of power from one corner of a country to the farthest most in the other directions. The expansion of the lines over different terrains and geographic locations makes these most vulnerable to different kinds of atmospheric calamities which more often develops faults in line. It is imperative to remove the faulty line at the earliest to restrict undue outflow of bulk power through the faulted point as well as restore system stability earliest to resume normal power flow operation. Here lays the importance of having a robust fault identification, classification and localization algorithm which would be successfully able to drive as well as actuate the digital relaying system. Researchers have worked out several methodologies in developing improved power system protection algorithms which would be able to serve to eliminate faults immediately on occurrence of the same. A brief yet exhaustive review has been presented in this article including the several methodologies adopted by numerous researchers for developing effective fault diagnosis schemes, mentioning about the highlights as well as the shortcoming of each of the methods. This compact and effective survey of literature works would help researchers to take up appropriate techniques for different purposes of transmission line fault analysis.

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“…Thus, in case of no fault at the power system, the change in injected current at all buses is equal to zero where in case of a fault at transmission line, the change of injected currents at the two buses in transmission lines ends is far from zero. In [11], the authors proposed a method based on the pilot impedance for transmission lines fault detection to improve the sensitivity and reliability of the protection by defining the fault components of positive, negative and zero sequence currents and voltages. Authors in [12] introduced a method for transmission lines fault identification and location based on three-phase estimation framework considering measurement chain error model, the method is suitable for both symmetrical and unsymmetrical networks.…”

Section: Introductionmentioning

confidence: 99%