Fault Section Localization Method for Distribution Network Based on Synchronous Phasor Measurement

Title:Fault Section Localization Method for Distribution Network Based on Synchronous Phasor Measurement

Volume: 17

Author(s): Yu Fu, Yue Li, Xiaobing Xiao, Shuo Liu*, Yongxiang Cai and Hao Liu

Affiliation:

• North China Electric Power University, the State Key Laboratory of Alternate Electrical Power System with Renewable Energy Sources, Beijing

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 highresistance 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 102.65ms, 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.

Cite this article as:

Fu Yu, Li Yue, Xiao Xiaobing, Liu Shuo*, Cai Yongxiang and Liu Hao, Fault Section Localization Method for Distribution Network Based on Synchronous Phasor Measurement, Recent Advances in Electrical & Electronic Engineering 2024; 17 () . https://dx.doi.org/10.2174/0123520965270773231117092924