Method for measuring micro-water content of silicone oil for cable terminal based on current test

A technology of current testing and micro-water content, which is applied in the direction of measuring devices, material capacitance, and material analysis through electromagnetic means, can solve the problems of long test time, achieve short test time, high measurement accuracy, and avoid the influence of environmental humidity Effect

Pending Publication Date: 2021-11-16
GUANGXI POWER GRID ELECTRIC POWER RES INST
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[0004] The purpose of the present invention is to provide a method for measuring the micro-water content of silicone oil for cable terminals based on current testing. The polarization-depolariza

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  • Method for measuring micro-water content of silicone oil for cable terminal based on current test
  • Method for measuring micro-water content of silicone oil for cable terminal based on current test
  • Method for measuring micro-water content of silicone oil for cable terminal based on current test

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[0054] The present disclosure embodiment will be described in detail below with reference to the accompanying drawings.

[0055] The embodiments of the present disclosure can be easily understood by the present specification by specific embodiments, and those skilled in the art can easily understand other advantages and efficacy of the present disclosure. Obviously, the described embodiments are merely the embodiments of the present disclosure, not all of the embodiments. The present disclosure can also be implemented or applied by different embodiments. The details in this specification may also be based on different perspectives and applications, and various modifications or changes are made without departing from the spirit of the present disclosure. It should be noted that the features in the following examples and embodiments may be combined with each other in the case of unlilled. Based on the embodiments of the present disclosure, those of ordinary skill in the art will bel...

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Abstract

The invention provides a method for measuring the micro-water content of silicone oil for a cable terminal based on current test, which comprises the following steps: carrying out polarization-depolarization current test on a to-be-tested silicone oil sample to obtain polarization current and depolarization current of the to-be-tested silicone oil sample; carrying out branch identification based on the extended Debye equivalent circuit model on the to-be-tested silicone oil sample by adopting a matrix beam algorithm; selecting a branch with a large time constant, and multiplying the weighting coefficient of the branch by the time constant to serve as a dielectric parameter reflecting the micro-water content in the insulating silicone oil; and calculating the micro-water content in the silicone oil according to the dielectric parameters of the micro-water content in the insulating silicone oil. According to the invention, the long-time testing of two processes of moisture balance and moisture testing in the traditional Karl Fischer testing method is avoided, so that the testing result can be obtained more quickly. The method is extremely high in measurement precision, extremely small in test result and calculation error, and more accurate and credible compared with other methods. The testing method is simple, has low requirements on the testing environment and the testing device, and is suitable for being popularized and used in the field.

Description

technical field [0001] The invention relates to the technical field of insulation protection for cable terminals, in particular to a method for measuring the moisture content of silicone oil for cable terminals based on current testing. Background technique [0002] The power cable is one of the key core electrical equipment in the urban power transmission and distribution network. The good insulation status of the cable and its accessories has gradually become the basic guarantee for the safe operation of the power system. Compared with the cable body, the cable accessories (cable intermediate joints and terminals) are the link with weak insulation, and are also the places where operation failures occur frequently. Compared with solid insulation terminals, cable terminals filled with insulating silicone oil have always occupied a large proportion of high-voltage cable terminals due to its mature manufacturing process and operating experience. However, in actual operation, ...

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Application Information

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IPC IPC(8): G01N27/22G06F17/16
CPCG01N27/221G01N27/223G06F17/16
Inventor 王飞风郭金明卓浩泽蒋圣超王斌李泰霖裴云庆吕泽承田树军
Owner GUANGXI POWER GRID ELECTRIC POWER RES INST
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