A backup protection scheme for the transmission lines based on the directional traveling wave and waveform similarity

Zhang, Yuhan; Wang, Shunliang; Liu, Tianqi; Li, Xiaopeng; Gooi, Hoay Beng; Ghias, Amer M. Y. M.; Xu, Ruiting; Chang, Tianyu

doi:10.1016/j.ijepes.2022.108864

Cited by 3 publications

(1 citation statement)

References 27 publications

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“…The similarity methods widely used in the research field are mainly divided into two categories. One is the data correlation algorithm represented by Pearson correlation [19] coefficient, cosine similarity [20], Spearman rank coefficient [21] etc. The other is the distance similarity algorithm represented by Hausdorff distance [22], dynamic time bending algorithm(DTW) [23], Bhattacharyya distance [24], longest common similarity subsequence algorithm (LCSS) [25], etc.…”

Section: Introductionmentioning

confidence: 99%

A pilot protection scheme based on high‐frequency transient current waveform similarity for AC lines connected to HVDC inverter station

Duan,

Song,

et al. 2024

IET Generation Trans & Dist

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Affected by inverter station commutation failure and fast control, line fault characteristics are obviously different from traditional AC transmission line fault characteristics. The existing protection methods for AC line connected to line commutated converter based high voltage DC (LCC‐HVDC) inverter station (ACLs) have the problems of complex setting, weak anti‐noise and high demand for data synchronization. This paper proposes a pilot protection scheme based on high‐frequency transient current waveform similarity. Firstly, with analyzing the fault traveling wave propagation process, the obvious differences are found in the transient current waveforms at both ends of the line when internal and external faults occur. Then the similarity of transient current waveforms is measured with the improved longest common similar subsequence (LCSS) method. And the weak high‐frequency current is extracted with the improved synchronous squeezed S‐transform (SST) method. Finally, a large number of power systems computer aided design (PSCAD) simulation results show that the proposed protection method does not require strict data synchronization, has strong anti‐noise performance, and is tolerant to the influence of abnormal point fluctuations.

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