Location method of partial discharge fault source of transformer

A positioning method and technology of discharging power, applied in the direction of instruments, measuring electricity, measuring electrical variables, etc., can solve the problems of parameter error sensitivity, method failure, excessive positioning error, etc., and achieve the effect of reducing the accuracy and improving the positioning accuracy.

Active Publication Date: 2009-11-18
NORTH CHINA ELECTRIC POWER UNIV (BAODING) +2
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Problems solved by technology

[0007] The present invention aims to provide a method for locating the partial discharge fault source of a transformer, which can solve the problem that the time difference method in the prior art is sensitive t

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  • Location method of partial discharge fault source of transformer
  • Location method of partial discharge fault source of transformer
  • Location method of partial discharge fault source of transformer

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[0022] Hereinafter, the present invention will be described in detail with reference to the drawings and in conjunction with the embodiments.

[0023] figure 1 Shows a flow chart of a method for locating a partial discharge source of a transformer according to an embodiment of the present invention, including the following steps:

[0024] S102: Detect the radio frequency signal generated by the partial discharge source inside the transformer through a plurality of sensing modules, and record the start time when the plurality of radio frequency signals are detected;

[0025] S104: Determine actual measured delay parameters of the radio frequency signal according to multiple starting moments;

[0026] S106, setting the wave speed parameter of the radio frequency signal;

[0027] S108: According to the measured time delay parameters and wave speed parameters, the location of the local discharge source is searched and obtained by using the spatial meshing method.

[0028] In this em...

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Abstract

The invention provides a location method of a partial discharge fault source of a transformer, comprising the following steps: detecting radio-frequency signals generated by a partial discharge source in the transformer by a plurality of sensor modules, and recording the initial time at which a plurality of radio-frequency signals are detected; determining the measured time delay parameters of the radio-frequency signals according to the plurality of the initial time; setting wave speed parameters of the radio-frequency signals; making use of the space mesh division method to search and obtain the location of the partial discharge source according to the measured time delay parameters and the wave speed parameters. In the prior art, the time difference method is very sensitive to parameter errors generated in the transformer actual measurement process, and even tiny parameter errors can lead to problems like method failure or over-great location errors. The method in the invention overcomes the above problems.

Description

technical field [0001] The invention relates to the field of transformer operation and maintenance, in particular to a method for locating a partial discharge fault source of a transformer. Background technique [0002] The power transformer is the key equipment of the power system, and the reliability of its operation is directly related to the safety and stability of the power system. Statistical analysis of actual faults shows that insulation faults are the main reason affecting the normal operation of transformers, and partial discharge is an important cause of insulation faults. [0003] Accurate partial discharge fault location not only plays an important role in the assessment of partial discharge hazards, but also is one of the basic prerequisites for transformer condition-based maintenance. It can provide scientific guidance for transformer condition-based maintenance, so that maintenance personnel can carry out equipment maintenance in a targeted manner. In additi...

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Application Information

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IPC IPC(8): G01R31/00G01R31/12
Inventor 唐志国李成榕常文治何维国姜益民周晓凡曹磊
Owner NORTH CHINA ELECTRIC POWER UNIV (BAODING)
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