S-Transform Based Traveling Wave Directional Pilot Protection for Hybrid LCC-MMC-HVDC Transmission Line

Zhang, Wei; Wang, Dong

doi:10.3390/en15134802

Cited by 3 publications

(1 citation statement)

References 19 publications

(20 reference statements)

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“…Grasping the actual dancing situation of transmission lines, it is possible to make targeted decisions to avoid accidents [4][5]. Therefore, the dance reconstruction of transmission lines has important research value [6][7].…”

Section: Introductionmentioning

confidence: 99%

Research on online monitoring and anti-dance technology of transmission line dance based on wide-area information transmission

An,

Wei,

Tang

et al. 2023

Applied Mathematics and Nonlinear Sciences

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This paper diagnoses the transmission line dancing situation based on the wide-area traveling wave information transmission and dancing mechanism. The characteristics of the wide-area initial traveling wave propagation are analyzed, and the traveling wave information of transmission line dancing is analyzed using wavelet transform. Measure the voltage traveling wave energy distribution for online monitoring and diagnosis of transmission lines. To study the dancing amplitude of transmission lines, a finite element analysis model is created. The detuned pendulum anti-dancing device is designed, the detuned pendulum dynamics equation is constructed, and the critical wind speed leading to transmission line dancing is investigated by the theoretical equation method and the stability theory method. Through the empirical analysis method, the transmission line dance monitoring and the anti-dance effect are analyzed. The experiments show that when the transmission line dances at a slower speed, the online monitoring method based on wide-area information monitors the motion of the target spacer bar between two neighboring frames between [1,3], and the processing speed is 138.2 frames per second faster than the other techniques, which is successful in tracking the dancing target of the transmission line. In the anti-dance test, before the anti-dancer was added, the transmission line amplitude reached 12,12m/s from the beginning at a wind speed of 18m/s and 14m/s to provoke dance. After the installation of the anti-dancer, the amplitude is maintained between [0,1] in most cases, and the anti-dancer has a good anti-dance effect.

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Section: Introductionmentioning

confidence: 99%

Research on online monitoring and anti-dance technology of transmission line dance based on wide-area information transmission

An,

Wei,

Tang

et al. 2023

Applied Mathematics and Nonlinear Sciences

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A Novel Pilot Protection Scheme Based on Differential Voltage for Hybrid LCC/MMC HVDC Transmission Lines

Han,

Chen,

Wen

et al. 2024

IEEE Trans. Power Delivery

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Research on fault localization method of transmission line based on distributed monitoring

Wu,

Shao,

et al. 2024

Applied Mathematics and Nonlinear Sciences

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Transmission lines are the arteries of power system operation, carrying the important task of conveying electric energy, which is the most fragile and fault-prone place in the power system. This paper first analyzes the traveling wave propagation characteristics of transmission lines. It builds a mathematical model for the refraction and reflection phenomena of traveling waves that occur in the process of readjustment and distribution of transmission lines. The three traveling wave monitoring points nearest to the fault point are used to localize the fault, and the principle of the phase difference of split-phase current is explored based on the fault component. By means of experimental analysis, the phase currents of the three measurement points are detected, and for the transient current waveforms at the time of lightning strikes and short-circuits, the lightning fault localization method of the transmission line based on wavelet transforms is proposed and analyzed for fault localization of the technique. The results of simulation experiments show that when a ground fault occurs in the L1 phase of the line, the current fault components of measurement point 2 and measurement point 3 increase rapidly, and the element between measurement points is more than 10kA. The phase difference of the components is 180°, so the fault interval of the transmission line is from measurement point 2 to measurement point 3, and the fault phase is the L1 phase. Upon analysis, it is apparent that the actual fault distance error of 0.838km is the measurement of the fault distance of the transmission line, and the method proposed in this paper has a high level of measurement accuracy.

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S-Transform Based Traveling Wave Directional Pilot Protection for Hybrid LCC-MMC-HVDC Transmission Line

Cited by 3 publications

References 19 publications

Research on online monitoring and anti-dance technology of transmission line dance based on wide-area information transmission

Research on online monitoring and anti-dance technology of transmission line dance based on wide-area information transmission

A Novel Pilot Protection Scheme Based on Differential Voltage for Hybrid LCC/MMC HVDC Transmission Lines

Research on fault localization method of transmission line based on distributed monitoring

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