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2000
Volume 18, Issue 3
  • ISSN: 2352-0965
  • E-ISSN: 2352-0973

Abstract

Background

The accurate locating of fault sections in a distribution network can lay an effective foundation for the rapid processing of faults. However, the waveform of high-resistance grounding faults is relatively weak, which increases the difficulty of fault feature extraction and localization. In addition, the complex operating conditions and interference factors of the actual distribution network can affect the fault section localization method, leading to incorrect location problems.

Objective

In order to overcome the limitations of existing fault section localization methods on fault resistance values and application scenarios, a fault section localization method for distribution networks based on synchronous phasor measurement is proposed in this paper.

Methods

Firstly, the transient zero sequence equivalent network of single-phase to ground faults in the distribution network is analyzed, revealing the differences in zero-sequence current within different sections of the faulty line. At the same time, based on the zero-sequence current waveform recorded by the waveform measurement device in actual distribution network, the characteristics of the waveform in different sections in the time and frequency domains are analyzed. Furthermore, a fault feature extraction method based on wavelet packet transform is proposed to construct fault differential features for different sections. Then, the grey correlation analysis method is adopted to calculate the correlation coefficients between different sections to construct locating criteria, thereby achieving accurate locating of fault sections in distribution network.

Results

The experimental results using field data indicate that the localization accuracy can reach 98.90%, and the calculation time is about 102.65 ms, which has high localization accuracy and localization efficiency.

Conclusion

Through analysis and relevant experiments, it is concluded that the proposed method can accurately locate faults in actual distribution networks, and still has correct locating results for high resistance grounding faults. The effectiveness of the method has been verified.

© 2025 Bentham Science Publishers
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2024-01-04
2025-07-25

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Fault Section Localization Method for Distribution Network based on Synchronous Phasor Measurement
Recent Advances in Electrical & Electronic Engineering 18, 306 (2025); https://doi.org/10.2174/0123520965270773231117092924
/content/journals/raeeng/10.2174/0123520965270773231117092924
/content/journals/raeeng/10.2174/0123520965270773231117092924
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  • Article Type:     Research Article
Keyword(s): distribution network; Fault section localization; grey correlation analysis; single phase ground fault; transient analysis; wavelet packet transform

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