Study of Non-unit Transient-based Protection for EHV Transmission Lines Using Backward Traveling-wave

Duan, Jiandong; Zhang, B.H.; Luo, Sibei; Ren, Juan

doi:10.1109/icpst.2006.321666

Cited by 4 publications

(3 citation statements)

References 4 publications

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“…5, the max top-bottom operator is 1.390, 1.389, 1.389 respectively, and ε is calculated to be 0.5. This result meets the criterion of bus fault shown in (9), so the bus protection will act to trip.…”

Section: A Single Phase Grounding Faultmentioning

confidence: 98%

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Study on The Novel Transient Bus Protection Based on Morphological Top-bottom-operator

Shu¹,

Dai²,

Xiao³

2011

IJISA

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Abstract-A novel transient component bus protection based on mathematical morphology is presented in this paper, which takes the morphological max top-bottomoperator of current traveling wave to fast distinguish the bus internal fault from the external fault. The method is based on the principle that the high frequency component of transient traveling wave caused by bus external fault will be attenuated by the bus capacitance but the traveling wave caused by bus internal fault changes slightly. Simulation is carried out with the electromagnetic transient simulation software PSCAD/EMTDC, the result verifies the bus protection is reliable and accurate. The novel bus protection also can treat lightning failure or lightning disturbance happened on transmission lines as bus external fault, without malfunction.

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Section: A Single Phase Grounding Faultmentioning

confidence: 98%

“…When bus external fault occurs, the transient high frequency component flowing through bus will be attenuated by the bus capacitance [9]. That is to say, the high frequency component included in current signal decreases and the gradient of waveform will get down.…”

Section: Introductionmentioning

confidence: 99%

Study on The Novel Transient Bus Protection Based on Morphological Top-bottom-operator

Shu¹,

Dai²,

Xiao³

2011

IJISA

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“…The high-frequency content is higher when an internal fault occurs, and is low when an external fault occurs. The principle and model of this method are relatively simple and easy to implement [10][11][12]. At the same time, the wave trappers and bus-to-ground capacitance at both ends of the line are generally called "line boundaries".…”

Section: Introductionmentioning

confidence: 99%

Transient Protection Principle Based on Current Ratio of Two Terminals in Frequency Domain

Zheng¹,

Chen²,

Wang³

2022

Electronics

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In order to prevent a transmission line boundary having a weak high frequency from impairing single-ended transient-based relay protection, this paper proposes using the coordination of the current frequency domain features of the relay on both sides of the transmission line to achieve whole-line quick-action protection. In the case of an internal fault, since the frequency components of the electrical quantities in the frequency domain on both sides of the protected line are related to the distance from the fault point to two sides of the line, the frequency-domain current spectrum information on both sides of the line is very different and the fluctuation is strong. In the case of an external fault, the transient current at the protection point closer to the fault is transmitted through the entire length of the protected line and reaches the other side away from the fault. Therefore, the fluctuation in the current spectrum in the frequency domain on both sides is quite different. Thus, this paper proposes setting the fault criterion according to the difference in the frequency spectrum fluctuation degree of the frequency-domain current ratio on both sides when internal and external faults occur. After verification using PSCAD simulation, it was found that the protection principle proposed in this article can act quickly and correctly, and identify internal and external faults, under different fault types and fault locations, and is basically not affected by transition resistance.

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Research on Protection Using One-End Current Based on Improved Recursive Wavelet Transform in Four-Terminal HVDC System

Shu-Ping-Gao

Xie

Zhang

et al. 2016

2016 International Symposium on Computer, Consumer and Control (IS3C)

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Study of Non-unit Transient-based Protection for EHV Transmission Lines Using Backward Traveling-wave

Cited by 4 publications

References 4 publications

Study on The Novel Transient Bus Protection Based on Morphological Top-bottom-operator

Study on The Novel Transient Bus Protection Based on Morphological Top-bottom-operator

Transient Protection Principle Based on Current Ratio of Two Terminals in Frequency Domain

Research on Protection Using One-End Current Based on Improved Recursive Wavelet Transform in Four-Terminal HVDC System

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