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Oil paper insulation micro-water content evaluation method utilizing mixed polarization model parameters

A technology of oil-paper insulation and mixed polarization, which is applied in the direction of measuring electricity, measuring devices, and measuring electrical variables, etc., can solve the problems of complex polarization response process of the internal medium and cannot accurately and truly reflect the medium response process of the oil-paper insulation system. The effect of simplicity, high accuracy, and high degree of parameter fitting

Inactive Publication Date: 2019-09-27
FUZHOU UNIV
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Problems solved by technology

[0002] At present, the equivalent circuit model based on the evaluation of the moisture content of oil-paper insulation is the extended Debye equivalent circuit model. Studies have shown that with the deterioration of the oil-paper insulation medium, the polarization response process of the internal medium becomes more complicated. The time-extended Debye model can no longer accurately and truly reflect the dielectric response process of the oil-paper insulation system, and the mixed-polarization equivalent circuit model overcomes the shortcomings of the above-mentioned extended Debye model. Method for Moisture Content of Insulation to Improve the Accuracy and Practicability of Moisture Content Evaluation of Oil-paper Insulation

Method used

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  • Oil paper insulation micro-water content evaluation method utilizing mixed polarization model parameters
  • Oil paper insulation micro-water content evaluation method utilizing mixed polarization model parameters
  • Oil paper insulation micro-water content evaluation method utilizing mixed polarization model parameters

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0048] According to step S1, three groups of oil-paper insulation test samples with micro-moisture content of 0.244%, 1.58% and 3.63% were produced, and the frequency-domain dielectric data of these three groups were tested by DIRANA dielectric response analyzer, as shown in Table 1-Table 3 Show:

[0049] Table 1 Dielectric measured data in frequency domain with 0.244% micro-water content

[0050]

[0051] Table 2 Dielectric measured data in frequency domain with micro-water content of 1.58%

[0052]

[0053]

[0054] Table 3 Micro water content 3.63% frequency domain dielectric measured data

[0055]

[0056] Based on the test data in Table 1-Table 3, according to steps S2 and S3, three groups of insulation resistance R with different water contents are solved g value, as shown in Table 4:

[0057] Table 4 Insulation resistance value of different moisture content

[0058] Moisture content (%) R / GΩ 0.244 R g ＝902.5029

1.58 R g ＝476.7843 ...

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Abstract

The invention relates to an oil paper insulation micro-water content evaluation method utilizing mixed polarization model parameters. The method comprises the following steps: firstly, solving a mixed polarization model parameter insulation resistance Rg based on a plurality of groups of FDS test data of oil paper insulation test articles with different micro-water contents; analyzing a change rule of the Rg along with the micro-water content, fitting a mathematical relation between the Rg and the micro-water content, and finally verifying the effectiveness and feasibility of the mathematical relation through examples, thereby providing the oil paper insulation micro-water content evaluation method utilizing the mixed polarization model insulation resistance.

Description

technical field [0001] The invention relates to a method for evaluating the micro-water content of oil-paper insulation by using mixed polarization model parameters. Background technique [0002] At present, the equivalent circuit model based on the evaluation of the moisture content of oil-paper insulation is the extended Debye equivalent circuit model. Studies have shown that with the deterioration of the oil-paper insulation medium, the polarization response process of the internal medium becomes more complicated. The time-extended Debye model can no longer accurately and truly reflect the dielectric response process of the oil-paper insulation system, and the mixed-polarization equivalent circuit model overcomes the shortcomings of the above-mentioned extended Debye model. A method for the moisture content of insulation to improve the accuracy and practicability of evaluating the moisture content of oil-paper insulation. Contents of the invention [0003] The purpose ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/12G01R31/14G01N27/04G01N27/02G06F17/50
CPCG01R31/1263G01R31/14G01N27/048G01N27/045G01N27/041G01N27/028G01N27/026G06F30/367
Inventor 邹阳林超群叶荣何津何倩玲
Owner FUZHOU UNIV
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