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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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Problems solved by technology

[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-depolarization current method is applied to the measurement of micro-water content of silicone oil for cable terminals, which solves the problem of the prior art test consumption. The question of duration

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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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Embodiment Construction

[0054] Embodiments of the present disclosure will be described in detail below in conjunction with the accompanying drawings.

[0055] Embodiments of the present disclosure are described below through specific examples, and those skilled in the art can easily understand other advantages and effects of the present disclosure from the contents disclosed in this specification. Apparently, the described embodiments are only some of the embodiments of the present disclosure, not all of them. The present disclosure can also be implemented or applied through different specific implementation modes, and various modifications or changes can be made to the details in this specification based on different viewpoints and applications without departing from the spirit of the present disclosure. It should be noted that, in the case of no conflict, the following embodiments and features in the embodiments can be combined with each other. Based on the embodiments in the present disclosure, a...

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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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