Low-voltage transformer area zero line live-line fault diagnosis device and diagnosis and positioning method

Abstract

The invention discloses a low-voltage transformer area zero line live-line fault diagnosis device and a diagnosis and positioning method. The device comprises a sensor module, a signal preprocessing circuit, a data acquisition and processing module, a wireless transmission module and a man-machine interaction module. The sensor module, the signal preprocessing circuit and the data acquisition andprocessing module are connected in sequence. The data acquisition and processing module performs data transmission with the man-machine interaction module through the wireless transmission module. Thedevice provided by the invention is simple in structure and low in use cost, and can realize accurate analysis and diagnosis of zero line live-line faults. According to the diagnosis and positioningmethod, a dichotomy is mainly used for diagnosing and positioning the waveform of a low-voltage transformer area line with a fault, the position of a discharge fault point can be accurately positionedthrough detection and comparison of zero line current phases, the number of positioning points is small, and operation is convenient. Meanwhile, through database comparison and judgment, the discharge type and severity can be judged, and the fault diagnosis and positioning accuracy is high.

Description

technical field [0001] The invention belongs to the technical field of electrical equipment detection, and in particular relates to a diagnostic device and a diagnostic and positioning method for live faults on zero lines in a low-voltage station area. Background technique [0002] With the rapid development of my country's economy and a series of preferential policies for rural household appliances issued by the country, the level of rural electrification has been continuously improved, but the number of zero line live faults in rural low-voltage station areas is also increasing sharply, and zero line live accidents The occurrence of serious threats to the normal production and life of residents. Due to the large number of users in the low-voltage distribution station area, the outgoing line and direction of the station area are complicated, and the lighting and electrical appliances in the residents' homes are still working when the neutral line fault occurs, it is difficul...

AI Technical Summary

Problems solved by technology

This method is safer than the traditional method, but the clamp ammeter can only give the value of the leakage current at this time, and further analysis and positioning are required by the staff, which is not conducive to the timely troubleshooting of the staff

Currently, clamp ammeters on the market have small measurement range, low precision, low detection efficiency, and cannot judge whether there is a fault in time, making it difficult to meet the demand for live fault diagnosis of the neutral line of overhead lines.

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