A control based protection adaptability improving strategy for transmission line with renewable energy integration

Ji, Liang; Tong, Yiqi; Yu, Zilin; Jiang, Enyu; Xi, Ruiling; Yin, Jing; Fu, Yang

doi:10.1016/j.ijepes.2023.109009

Cited by 5 publications

(1 citation statement)

References 16 publications

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“…Therefore, some scholars have proposed protection methods applicable to new energy grid-connected lines. Literature [5][6][7] proposed a protection method based on the frequency difference between DFIG and system-side fault current, but this method cannot be applied to gridconnected lines containing inverter-type power supply; Literature [8][9][10] proposed a localization method based on the time-domain model, but this method is susceptible to high-frequency harmonic components and has poor applicability. Aiming at the difficulty of fault location of new energy outgoing line, this paper proposes a new energy outgoing line fault location method based on Pearson correlation coefficient according to the transient current characteristics of different power supply faults, and realizes fault location by calculating the correlation coefficient of fault current of two adjacent monitoring points.…”

Section: Introductionmentioning

confidence: 99%

New energy transmission line fault location method based on Pearson correlation coefficient

Pan,

Xu,

Zhang

et al. 2024

J. Phys.: Conf. Ser.

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The access of new energy power source makes the traditional transmission line structure become complex, and due to the influence of power electronic device control strategy, the fault characteristics have been fundamentally changed, resulting in the traditional transmission line fault localization method can not be applied to the new energy sending line. To address the above problems, this paper analyzes the transient current characteristics of different power supply faults, and learns that there are obvious differences in the transient currents on both sides of the fault point inside and outside the transmission line area, and then proposes a new energy transmission line fault localization method based on the Pearson correlation coefficient, which determines the fault location by calculating the correlation coefficients of the fault waveforms of the neighboring monitoring points. Finally, comparative experiments are carried out under different fault types and fault locations to further verify the applicability of the proposed method.

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