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Method for calculating water content in insulating paper based on insulating oil aging compensation

A calculation method and insulating paper technology, applied in the direction of material electrochemical variables, measuring devices, instruments, etc., can solve problems such as interference of test results

Active Publication Date: 2016-07-06
STATE GRID FUJIAN ELECTRIC POWER CO LTD +3
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Problems solved by technology

However, insulation aging products will produce gas products such as moisture and gas, which will interfere with the test results

Method used

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  • Method for calculating water content in insulating paper based on insulating oil aging compensation
  • Method for calculating water content in insulating paper based on insulating oil aging compensation
  • Method for calculating water content in insulating paper based on insulating oil aging compensation

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Embodiment Construction

[0054] The technical solution of the present invention will be specifically described below in conjunction with the accompanying drawings.

[0055] Such as figure 1 As shown, a method for calculating water content in insulating paper based on insulating oil aging compensation of the present invention includes the following steps,

[0056] S1: Sampling and testing the transformer oil to obtain the water content in the transformer oil. Specifically, the coulometric method is used to sample and test the transformer oil. The process is as follows:

[0057] Extract a 1mL transformer oil sample, test the sample with a coulometric analyzer, and calculate the water content W in the transformer oil by the following formula oil ,

[0058] W o i l = Q × 10 3 D V ...

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Abstract

The invention relates to a method for calculating water content in insulating paper based on insulating oil aging compensation. The method comprises the following steps: firstly, sampling and detecting transformer oil so as to obtain water content of the transformer oil; secondly, calculating actual steam pressure P in air according to the water content obtained in the step 2; thirdly, performing aging treatment on the transformer oil, and calculating an aging coefficient as shown in the speciation via comparison of the water contents of new transformer oil and old transformer oil; finally, according to a Norris oil-paper moisture balance curve, calculating water content C in the insulating paper. The influence of insulating aging is taken into account, equations for calculating water content of the paper according to the water content in oil are provided, and a relatively accurate and convenient way is provided for application of the water balance relationship of oil and paper.

Description

technical field [0001] The invention belongs to the field of insulation state evaluation and life prediction of electric equipment, and in particular relates to a method for calculating water content in insulating paper based on insulating oil aging compensation. Background technique [0002] Oil-paper insulation structures are widely used in power transformers, and the performance of insulating materials directly affects the electrical performance and operating life of transformers. Moisture is an important factor affecting the performance of oil and paper insulation materials. A small amount of moisture in the oil will reduce the breakdown voltage of the insulation system and increase the dielectric loss of the insulation system. When the moisture content in the oil exceeds a certain threshold, the insulation performance of the equipment will be greatly reduced. Moreover, moisture always gathers in the most dangerous high field strength area. This is because water is a hi...

Claims

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Application Information

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IPC IPC(8): G01N27/42
CPCG01N27/423
Inventor 施广宇王康林志坚李志华涂恩来王国彬潘晨曦林轶群
Owner STATE GRID FUJIAN ELECTRIC POWER CO LTD
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