Method and device for evaluating moisture content of oil-paper insulation
A technology of oil-paper insulation and water content, which is applied in the direction of measuring devices, measuring electricity, and measuring electrical variables, etc., which can solve the problems that the accuracy and rapidity of water content evaluation of oil-paper insulation cannot be guaranteed.
Active Publication Date: 2022-05-03
陕西和峰智电科技有限公司
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[0004] The embodiment of the present application provides a method and device for evaluating the water content of oil-paper insulation, which is used to solve the technical problem that the existing evaluation methods cannot guarantee the accuracy and rapidity of water content evaluation of oil-paper insulation
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[0026] In order to make the purpose, technical solution and advantages of the present application clearer, the technical solution of the present application will be clearly and completely described below in conjunction with specific embodiments of the present application and corresponding drawings. Apparently, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in this application, all other embodiments obtained by persons of ordinary skill in the art without making creative efforts belong to the scope of protection of this application.
[0027] The main insulation of the existing capacitive oil-paper bushing is composed of oil-paper two-phase composite insulation, and its remaining life mainly depends on the state of the internal oil-paper insulation. Moisture, as one of the most important factors affecting the running state of oil-paper insulating bushings, is regarded as the "number...
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The present application discloses a method and device for evaluating the water content of oil-paper insulation, which are used to solve the technical problem that the existing evaluation methods cannot guarantee the accuracy and rapidity of water content evaluation of oil-paper insulation. The method includes: obtaining the frequency-domain dielectric spectrum FDS test results of the oil-paper insulation sample in the preset frequency range; based on the FDS test results in the preset frequency range, determining the FDS characteristic value corresponding to the preset cut-off frequency; wherein, the preset cut-off frequency The frequency is the minimum frequency within the preset frequency interval; the FDS characteristic value is input into the oil-paper insulation water content evaluation model to determine the water content of the oil-paper insulation sample. The present application realizes the evaluation of the water content of the oil-paper insulation through the above method, and at the same time ensures the accuracy of the evaluation result and the rapidity of the evaluation process.
Description
technical field [0001] The present application relates to the technical field of condition diagnosis of oil-paper insulation equipment, in particular to a method and device for evaluating the moisture content of oil-paper insulation. Background technique [0002] The main insulation of the capacitor type oil-paper bushing is composed of oil-paper two-phase composite insulation, and its remaining life mainly depends on the state of the internal oil-paper insulation. Moisture, as one of the most important factors affecting the running state of oil-paper insulating bushings, is regarded as the "number one threat" to the bushing insulation system. Under the action of an electric field, water molecules with a large dielectric constant are easily polarized into "gas bridges" arranged in an orientation, resulting in accelerated insulation degradation. At the same time, the increase of moisture will increase the conductance of the medium, increase the heat generation of the oil-pap...
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IPC IPC(8): G01R31/12G01N27/22G06N20/00
CPCG01R31/1263G01N27/221G01N27/223G06N20/00
Inventor 穆海宝姚欢民张大宁赵浩翔张冠军
Owner 陕西和峰智电科技有限公司