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A distributed line fault detection and location system and method

A line fault and positioning system technology, applied in radio wave measurement system, fault location, positioning and other directions, can solve the problem that the arc fault positioning of transmission and distribution lines is not effective enough, the fault identification and positioning accuracy is not high, and the investment cost of monitoring faults is large, etc. problems, to avoid power outage installation and maintenance, improve fault identification rate, improve fault identification and positioning accuracy

Active Publication Date: 2022-05-17
CHONGQING UNIV
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Problems solved by technology

[0003] The purpose of the present invention is to provide a distributed line fault detection and positioning system and method to solve the problem of insufficient effectiveness in the prior art for arc fault positioning of power transmission and distribution lines, low fault identification and positioning accuracy, and high investment costs for monitoring faults. The need for power outage installation brings inconvenience to installation and maintenance

Method used

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  • A distributed line fault detection and location system and method
  • A distributed line fault detection and location system and method
  • A distributed line fault detection and location system and method

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Embodiment approach

[0076] An optional implementation manner, the signal acquisition module also includes:

[0077] a filtering unit, configured to filter the collected electromagnetic radiation signal;

[0078] an amplifying unit, configured to amplify the filtered electromagnetic radiation signal;

[0079] The data acquisition unit is used to collect the amplified electromagnetic radiation signal.

[0080] In an optional implementation manner, the filtering unit adopts a band-pass filter with a bandwidth of 30-120 MHz, and the amplifying unit adopts an amplifier with a gain of 15 dB.

[0081] In an optional implementation manner, the signal collection module further includes a GPS time synchronization unit, configured to control the sampling frequency of the data collection unit for collecting electromagnetic radiation signals. Using the GPS time synchronization unit set at each site to control the sampling frequency of the site’s data acquisition unit can realize the synchronization of multi...

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Abstract

The invention discloses a distributed line fault detection and positioning system. The system is respectively installed at a plurality of stations, wherein the system includes: a signal acquisition module, which is used to collect the electromagnetic signal generated by the arc fault of the line in the area to be detected. Radiation signal; signal analysis module, which is used to analyze the spectrum characteristics of the collected electromagnetic radiation signal, extract characteristic parameters, and compare the extracted characteristic parameters with preset characteristic thresholds to determine whether an arc fault occurs on the line; fault location module , which is used to determine the location of the arc fault based on the arrival time difference positioning principle when it is judged that the arc fault occurs on the line. The invention discloses a distributed line fault detection and location method. The invention can effectively detect the arc fault by utilizing the electromagnetic radiation signal generated by the arc fault, and realize accurate positioning of the fault.

Description

technical field [0001] The invention relates to the technical field of power transmission and distribution lines in electric power systems, in particular to a distributed line fault detection and location system and method. Background technique [0002] The transmission and distribution lines of the power system are an important part of the power grid. With the continuous expansion of the scale of the power grid, especially the medium-voltage overhead lines, there are many branches and complex feeder structures. Therefore, the intelligent fault detection and location of power transmission and distribution lines put forward higher requirements. Timely and accurate positioning of power system faults can greatly improve the safety and stability of power grid operation. The existing transmission and distribution line fault location technology mainly collects electrical quantities such as voltage and current, and performs inversion in combination with the line model. However, th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/08G01R31/12G01S5/06
CPCG01R31/085G01R31/088G01R31/1272G01S5/06Y04S10/52
Inventor 杨庆韦思宇周桐罗曼丹
Owner CHONGQING UNIV
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