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

A fault diagnosis device, a technology of low-voltage station area, applied in the direction of measurement device, measurement of electricity, measurement of electric variables, etc., can solve the problem of low accuracy, inability to judge whether there is a fault in time, and it is difficult to meet the needs of overhead line zero line live fault diagnosis and other problems to avoid cumbersome wiring

Pending Publication Date: 2020-08-11
广西电网有限责任公司桂林供电局
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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
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Method used

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

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Example Embodiment

[0069] Examples:

[0070] Such as figure 1 As shown, a low-voltage station zone zero line live fault diagnosis device includes a sensor module, a signal preprocessing circuit, a data acquisition and processing module, a wireless transmission module, and a human-computer interaction module; the sensor module, signal preprocessing circuit, The data acquisition and processing modules are sequentially connected; the data acquisition and processing module performs data transmission with the human-computer interaction module through the wireless transmission module.

[0071] Further, such as figure 2 As shown, the sensor module includes four current transformers, which are respectively sleeved on the A, B, and C three-phase wires and the neutral wire to sense the A, B, C three-phase current and the neutral current.

[0072] Further, the signal preprocessing circuit adopts an active bandpass filter. The circuit schematic diagram is as image 3 As shown, it is mainly composed of resistors...

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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...

Claims

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Application Information

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IPC IPC(8): G01R31/12G01R31/58
CPCG01R31/1272G01R31/58
Inventor 伍振园李想毛振宇钱帅伟李方利谢旭
Owner 广西电网有限责任公司桂林供电局
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