Distribution network cable fault discrimination method and system using grounding current signal
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A ground current and cable fault technology, applied in relational databases, data processing applications, special data processing applications, etc., can solve problems such as misjudgment or missed judgment, achieve small safety restrictions, easy promotion and application, and accurate result reliability Effect
Active Publication Date: 2019-07-12
ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY +2
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Due to the complexity of the electromagnetic environment of the cable channel, the judgment based o
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Embodiment 1
[0050] This embodiment provides a method for discriminating faults of distribution network cables using ground current signals, which includes steps:
[0051] 1) Select a typical distribution network cable line that needs to be monitored, monitor its grounding current for a long time, and obtain original data;
[0052] 2) Use t-SNE to carry out data mining and visualization processing on the monitored data to extract the characteristics of the original data, and use DBSCAN to perform cluster analysis on it, and classify the "abnormal" clusters without periodic changes with Compare the actual situation on site and establish a knowledge base based on ground current characteristics;
[0053] 3) Using the knowledge base based on ground current characteristics, compare the ground current signals monitored in real time, and update the knowledge base according to the site conditions, so as to realize the real-time discrimination of the status characteristics of the cable.
[0054] I...
Embodiment 2
[0071] This embodiment provides a distribution network cable fault discrimination system using ground current signals, which includes:
[0072] Raw data acquisition module: select a typical distribution network cable line that needs to be monitored, monitor its grounding current for a long time, and obtain raw data;
[0073] t-SNE data processing module: use t-SNE to perform data mining and visualization processing on the monitored data to extract the characteristics of the original data;
[0074] DBSCAN clustering module: use DBSCAN to perform cluster analysis on the characteristics of the original data;
[0075] Knowledge base building module: compare the classified "abnormal" clusters without periodic changes with the actual situation on site, and establish a knowledge base based on ground current characteristics;
[0076] Real-time identification module: use the knowledge base based on ground current characteristics to compare the ground current signals monitored in real ...
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Abstract
The invention discloses a distribution network cable fault discrimination method and system using a grounding current signal. The distribution network cable fault discrimination method using the grounding current signal comprises the following steps: 1) selecting a typical distribution network cable line needing to be monitored in an emphasis manner, monitoring the grounding current of the typicaldistribution network cable line for a long time, and obtaining original data; 2) utilizing t-SNE to perform data mining and visualization processing on the monitored data to extract the characteristics of the original data, performs clustering analysis on the original data by using the DBSCAN, compares the classified non-periodic change rule abnormal cluster with the actual situation of the site,and establishes a knowledge base based on the characteristics of the grounding current; and 3) comparing the grounding current signals monitored in real time by using a knowledge base based on the grounding current characteristics, and updating the knowledge base according to on-site conditions to realize real-time discrimination of the state characteristics of the cable. The judgment of the distribution network cable is hardly influenced by the electromagnetic environment of the cable, and the result credibility is more accurate than the judgment result based on the threshold value.
Description
technical field [0001] The invention relates to the field of distribution network cables, in particular to a distribution network cable fault discrimination method and system based on t-SNE data mining and DBSCAN clustering using ground current signals. Background technique [0002] In recent years, with the rapid development of urban construction, the scale of power cables in central urban areas has increased dramatically due to their advantages such as large transmission capacity and space saving. The number of new power cable lines put into operation continues to grow rapidly every year, and short-circuit faults also increase accordingly. The safe and reliable operation of cable lines is increasingly evident in supporting the stability of regional power grids and large-area reliable power supply. With the increase of cable lines, the accompanying safety hazards and operation and maintenance risks also increase accordingly. After a cable fault occurs, it is necessary to q...
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IPC IPC(8): G06F16/26G06F16/28G06Q50/06
CPCG06Q50/06G06F16/26G06F16/285
Inventor 谢成邵先军王昱力王子凌欧阳本红夏荣李文杰郑一鸣金强
Owner ELECTRIC POWER RES INST OF STATE GRID ZHEJIANG ELECTRIC POWER COMAPNY
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