Nonuniform three-phase power lines: resonance effects due to conductor transposition

Faria, J. A. Brandão; Neves, M. Guerreiro das

doi:10.1016/j.ijepes.2003.08.001

Cited by 9 publications

(2 citation statements)

References 11 publications

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“…It is 670μs and 335μs, for 100km and 50km transposition length, respectively. This agrees with the resonance behaviour in [35]. The magnitude of the first pulse is much larger than that of the following pulses.…”

Section: E Transposition Lengthsupporting

confidence: 88%

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Identification Method for Pulse Wave Resulted From Fault Transient of Overhead Transmission Line

Liu

Zhou

et al. 2023

IEEE Access

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This paper presents a simple and effective method to extract the identification quantity of transient pulse waveform produced by the overhead transmission line short-circuit fault. This method employs the second-order time harmonic equation of the power frequency component to convert the fault full-wave data. After the conversion, only the identification quantity remains. This method can amplify high-frequency spectral content by the times of the square of the angular frequency, and hence improve the sensitivity of identifying fault transient. Using the identification quantity, one can clearly observe the arrival time and relative intensity of fault transient. A three-phase half wavelength transmission line of 50Hz/3000km is simulated with PSCAD to illuminate the effectiveness of this method. The effects of fault type, soil resistivity, fault resistance, power frequency fluctuation, sampling rate, transposition length,fault inception angle and white noise are analyzed. Calculated results show that this method can distinguish different fault type and can work effectively at low sampling rate down to 10kHz. This method is helpful for improving the performance of the traveling-wave based fault location method.

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Section: E Transposition Lengthsupporting

confidence: 88%

“…According to Ref. 35, a single-circuit overhead line can exhibit repetitive resonant behaviour at frequencies such that the overall transposition cycle length gets close to an integer multiple of one half wavelength. As a result, the proposed identifiers may be interfered by these highfrequency resonance effects.…”

Section: E Transposition Lengthmentioning

confidence: 99%

Identification Method for Pulse Wave Resulted From Fault Transient of Overhead Transmission Line

Liu

Zhou

et al. 2023

IEEE Access

View full text Add to dashboard Cite

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Rigorous calculation method for resonance frequencies in transmission line responses

Chrysochos

Papadopoulos

Papagiannis

2015

IET Generation, Transmission & Distribution

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This study presents a new, generalised method for the calculation of resonance frequencies (RFs) in transmission line (TL) responses. The proposed method calculates the RF of any propagation mode and is applicable to all types of TL configurations, taking also into account the effect of the source and load impedances as well as of possible transpositions or cross-bondings. The results are validated with the corresponding results obtained from frequency-domain transient simulations and laboratory measurements, whereas simple theoretical formulas for both overhead lines and underground cables are also investigated, revealing their limited accuracy. Practical cases of engineering interest are demonstrated, where the required single or multiple RFs are accurately calculated by the proposed method. Finally, the performance of the presented methodology is thoroughly examined incorporating two diagonalisation approaches for the calculation of the modal propagation velocities.

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Frequency-domain analysis of the characteristic impedance matrix of high-voltage transmission lines

Araneo

Celozzi

Faria

2017

2017 International Symposium on Electromagnetic Compatibility - EMC EUROPE

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Nonuniform three-phase power lines: resonance effects due to conductor transposition

Cited by 9 publications

References 11 publications

Identification Method for Pulse Wave Resulted From Fault Transient of Overhead Transmission Line

Identification Method for Pulse Wave Resulted From Fault Transient of Overhead Transmission Line

Rigorous calculation method for resonance frequencies in transmission line responses

Frequency-domain analysis of the characteristic impedance matrix of high-voltage transmission lines

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