Power distribution network single-phase ground fault section locating method and power distribution network single-phase ground fault section locating system

[0053] This embodiment provides a method for locating a single-phase-to-ground fault section in a distribution network based on synchronous waveform feature extraction and matrix analysis. Please refer to the attached figure 1 , the method includes the following steps:

[0054] S101, acquiring current waveform data of multiple fault samples at several nodes in the distribution network, and extracting waveform feature quantities of each fault sample at several nodes;

[0055] S102, constructing a topology matrix of each fault sample based on the waveform feature quantities of each fault sample at several nodes;

[0056] S103, calculating the random matrix eigenvalue of each fault sample, and constructing a set of eigenvalues ​​of each fault sample;

[0057] S104, clustering all fault sample eigenvalue sets to obtain the aggregation center point of each fault section;

[0058] S105. Calculate the random matrix eigenvalues ​​of the fault samples to be located, find the cluster cen

[0136] This embodiment provides a distribution network single-phase ground fault section positioning system, the system includes several fault recorders installed at each node in the distribution network and a processor arranged in the dispatch center; wherein:

[0137]The fault recorder is used to obtain the current waveform data of multiple fault samples in the distribution network at all nodes, extract the waveform feature quantity of each fault sample at all nodes, and obtain the fault samples to be located at its nodes From the current waveform data at the node, extract the waveform feature quantity of the fault sample to be located at its node;

[0138] The processor is configured to construct a topology matrix of each fault sample based on waveform eigenvalues ​​of each fault sample at all nodes; analyze the topology matrix of each fault sample, and calculate the random matrix eigenvalue of each fault sample, Construct the eigenvalue set of each fault sample; cluster all t

[0157] This embodiment provides a computer-readable storage medium, on which a computer program is stored, and when the program is executed by a processor, the following steps are implemented:

[0158] Obtain the current waveform data of multiple fault samples at several nodes in the distribution network, and extract the waveform feature quantity of each fault sample at several nodes;

[0159] Based on the waveform feature quantities of each fault sample at several nodes, construct a topology matrix for each fault sample;

[0160] Calculate the random matrix eigenvalues ​​of each fault sample, and construct a set of eigenvalues ​​for each fault sample;

[0161] Clustering all fault sample eigenvalue sets to obtain the aggregation center point of each fault section;

[0162] Calculate the random matrix eigenvalues ​​of the fault samples to be located, find the cluster center point with the smallest distance from the random matrix eigenvalues ​​of the fault samples to be located,