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Qualitative evaluation method of moisture content in oil-paper insulation equipment based on relaxon spectrum

A technology of oil-paper insulation and micro-water content, which is used in measurement devices, material analysis by electromagnetic means, instruments, etc., can solve problems such as inability to be widely used, and achieve a good evaluation effect.

Inactive Publication Date: 2016-09-07
FUZHOU UNIV
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Problems solved by technology

However, these diagnostic methods lack consideration of the influence of temperature, insulation damp and external interference factors, so they cannot be widely used in practice.

Method used

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  • Qualitative evaluation method of moisture content in oil-paper insulation equipment based on relaxon spectrum
  • Qualitative evaluation method of moisture content in oil-paper insulation equipment based on relaxon spectrum
  • Qualitative evaluation method of moisture content in oil-paper insulation equipment based on relaxon spectrum

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Embodiment Construction

[0030] The technical solution of the present invention will be specifically described below in conjunction with the accompanying drawings.

[0031] A flow chart of a method for qualitative evaluation of micro-water content in oil-paper insulation equipment based on relaxor spectral lines of the present invention, as shown in figure 1 shown; it includes the following steps:

[0032] Step 1: Differentiate the measured depolarization current spectral line to obtain the differential spectral function :

[0033] (2)

[0034] Step 2: Differentiate the spectral function from Start at the end, take two points arbitrarily , , creating the following equations:

[0035] (3)

[0036] Calculate the unknown quantity I by formula (3) d1 and offspring into , the first sub-spectral line L can be obtained 1 ;

[0037] Step 3: Put the differential line Subtract the first sub-line L 1 get the remaining differential lines . Then from the remaining differential lines ...

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Abstract

The invention relates to a relaxation sub-spectral line-based qualitative evaluation method for micro-water content of an oiled paper insulating device. The method comprises the steps of firstly measuring depolarization current of the oiled paper insulating device, then sequentially spectrum unfolding on a depolarization current derivative spectrum function, displaying the micro-water content information inside the depolarization current in a form of sub-spectral lines, and qualitatively evaluating the micro-water content of the oiled paper insulating device. If more sub-spectral lines are analyzed from the depolarization current spectrum line of the oiled paper insulating device, the micro-water content of the oiled paper insulating device is higher, and otherwise, if fewer sub-spectral lines are analyzed from the derivative spectrum, the micro-water content of the oiled paper insulating device is lower. By adopting the evaluation method, an intuitive and accurate analysis means is provided for the qualitative evaluation on the micro-water content of the oiled paper insulating device.

Description

technical field [0001] The invention proposes a qualitative evaluation method for the micro-water content of oil-paper insulation equipment based on relaxor spectral lines, and the method relates to the technical field of evaluation of micro-water content of oil-paper insulation equipment. Background technique [0002] At present, the main methods used to evaluate the moisture content of oil-paper insulation are: Karl Fischer titration method, dew point method, oil-paper moisture balance relationship curve method, and electrical diagnosis method based on dielectric response theory. The Karl Fischer titration method needs to extract insulation samples from the inside of the oil-paper insulation equipment for testing, which may cause damage to the equipment during the sampling process; the test process of the dew point method needs to break the vacuum, and it is difficult to obtain experimental data; the oil-paper moisture balance curve method is used There is also a certain l...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01N27/60
Inventor 蔡金锭曾静岚李安娜彭积成
Owner FUZHOU UNIV
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