A Method for Estimating Moisture Content of Traction Transformer Insulating Paper Considering Service Time
A traction transformer and insulating paper technology, which is applied in the field of traction transformer insulation damp state estimation, can solve the problems of reduced absorption capacity of insulating paper and more obvious influence of moisture absorption capacity of insulating paper, and achieve the effect of accurate moisture content
Active Publication Date: 2019-09-06
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology
However, with the operation of the traction transformer, the insulating paper will gradually age. With the deepening of the aging of the insulating paper, the ability of the insulating paper to absorb moisture will gradually decrease, and when the insulating paper is immersed in insulating oil, the aging of the cellulose will affect the The moisture absorption capacity of insulating paper is more obvious
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[0026] The present invention will be further described below in conjunction with accompanying drawing:
[0027] figure 1 Shown is a flow chart of a method for estimating the moisture content of traction transformer insulating paper considering service time. from figure 1 It can be seen that a method for estimating the moisture content of traction transformer insulating paper considering service time mainly includes the following steps:
[0028] Step 1: Estimate preparation and transformer oil sampling
[0029] Check the nameplate or factory report of the traction transformer to be tested, record the operation time of the traction transformer to be tested (recorded as N years), take the traction transformer to be tested offline, and then sample the transformer oil in the traction transformer to be tested, and test and record the sampling time The temperature of the transformer oil is T (degrees Celsius);
[0030] Step 2: Moisture test in transformer oil for traction transfo...
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The invention discloses a method for estimating the water content of traction transformer insulation paper in consideration of service time. The steps are: 1) preparation for estimation and sampling of transformer oil; 2) moisture test in transformer oil of traction transformer; 3) estimation of transformer oil at temperature T 4) Estimated water vapor partial pressure value in transformer oil at moisture absorption saturation at temperature T; 5) Estimated water vapor partial pressure value in transformer oil at temperature T; 6) Estimated moisture content in traction transformer insulation paper at temperature T content. The invention can consider the influence of the working time of the traction transformer on the estimation of the moisture content in the insulating paper, and can obtain the moisture content in the insulating paper of the traction transformer more accurately.
Description
technical field [0001] The invention belongs to the field of estimating the damp state of traction transformer insulation, and in particular relates to a method for estimating the moisture content of traction transformer insulating paper considering service time. Background technique [0002] High-speed railways have entered a period of rapid development in my country. Traction transformers are the core equipment in traction power supply systems. Their performance and operating status are directly related to the economy and reliability of the entire system. Moisture is one of the important factors affecting the insulation performance of traction transformer insulation paper. First, it is very important to accurately estimate the moisture content in the traction transformer insulation paper. However, with the operation of the traction transformer, the insulating paper will gradually age. With the deepening of the aging of the insulating paper, the ability of the insulating pap...
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IPC IPC(8): G01N33/34G01N33/28
Inventor 郭蕾王东阳周利军廖维李会泽
Owner SOUTHWEST JIAOTONG UNIV