Experimental method for assessing and researching moisture content of transformer insulation paper

Abstract

Due to the influence by an ageing state and environmental factor, the moisture in the transformer insulation paper is in a transient distribution state, the moisture content in the transformer insulation paper cannot be accurately acquired since the method for calculating the moisture content in the insulation paper and measuring the transformer power frequency dielectric loss by measuring the moisture content in the insulation oil in the engineering, so that the insulation performance of the transformer insulation paper cannot be effectively assessed, the invention discloses an experimental method for assessing and researching the moisture content of the transformer insulation paper, the moisture distributions in the transformer insulation paper under different ageing states at differenttemperatures can be acquired, and the average moisture content in the transformer insulation paper can be computed, thereby effectively assessing the insulation performance of the transformer insulation paper.

Description

technical field [0001] The invention belongs to the field of transformer insulation state evaluation, and in particular relates to an experimental method for evaluating and researching the moisture content of transformer insulating paper. Background technique [0002] As the core equipment of the power system and traction power supply system, the transformer's internal insulation performance determines the safety and stability of the power system and traction power supply system. [0003] Moisture is the main factor affecting the insulation performance of the transformer. The existence of moisture will accelerate the aging rate of the transformer insulation paper, resulting in a decline in the dielectric properties of the transformer's internal insulation, and even lead to partial discharge of the transformer's internal insulation. In order to effectively evaluate the transformer's internal insulation For insulation performance, it is necessary to obtain the moisture content...

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Problems solved by technology

[0003] Moisture is the main factor affecting the insulation performance of the transformer. The existence of moisture will accelerate the aging rate of the transformer insulation paper, resulting in a decline in the dielectric properties of the transformer's internal insulation, and even lead to partial discharge of the transformer's internal insulation. In order to effectively evaluate the transformer's internal insulation For insulation performance, it is necessary to obtain the moisture content in the insulating paper of the transformer. At present, the moisture content in the insulating paper is often calculated by measuring the moisture content in the insulating oil or the moisture content of the insulation in the transformer is evaluated by measuring the power frequency dielectric loss of the transformer. However, Due to the influence of the aging state of the insulating paper and environmental factors such as temperature and humidity, the moisture content in the transformer insulating paper is always in a transient distribution state, and it is impossible to effectively evaluate the transformer insulating paper through the measurement of the moisture content in the insulating oil and the power frequency dielectric loss moisture content in

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