A Method for Evaluating the Aging State of Traction Transformer Insulating Oil
A technology for traction transformers and aging states, applied in instruments, scientific instruments, measuring electrical variables, etc., can solve problems such as poor accuracy and inability to accurately evaluate the aging state of insulating oil, and achieve the effect of improving monitoring capabilities
Active Publication Date: 2021-07-20
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology
At present, the aging state of insulating oil is mainly judged by the acid value in the oil and the dielectric loss factor, but the existing technology is mainly judged based on empirical values, and the accuracy is poor.
Oil chromatography is generally considered to be one of the effective methods for the diagnosis of insulating oil aging, but the current analysis methods cannot effectively use the gas data information of oil chromatography to accurately evaluate the aging state of insulating oil, so an evaluation of the aging state of traction transformer insulating oil is urgently needed method
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Embodiment Construction
[0039] The present invention will be further described below in conjunction with the accompanying drawings.
[0040] Step 1: Build a traction transformer insulation oil aging test platform
[0041] Traction transformer insulating oil aging test platform, mainly composed of test chamber 1, temperature control system 2, first temperature sensor 3a, second temperature sensor 3b, heating plate 4, partial discharge control system 5, needle electrode 6, high voltage bushing 7 , terminal machine 8, insulating oil, high voltage generating device 10, insulating support 11 and plate-shaped electrode 12, a heating plate 4 is installed at the bottom of the test chamber 1, and the high-voltage output terminal of the high-voltage generating device 10 is connected to the needle-shaped electrode through a high-voltage bushing 7 6. The ground terminal of the high-voltage generating device 10 is connected to the plate-shaped electrode 12, the first temperature sensor 3a and the second temperatu...
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The invention discloses a method for evaluating the aging state of the insulating oil of a traction transformer. Firstly, insulating oil samples with different thermal aging and electrical aging degrees are prepared, and then the characteristic gas content is obtained through chromatographic analysis, and then the insulating oil to be evaluated and the insulating oil sample are obtained. The degree of correlation is used to evaluate the aging state of insulating oil. The invention also provides an insulating oil aging test platform. A heating plate is arranged at the bottom of the test box, and a plate-shaped electrode is arranged inside, and a needle-shaped electrode is arranged above the plate-shaped electrode; Inside; the plate-shaped electrode and the needle-shaped electrode are respectively connected to the high-voltage generating device, and the high-voltage generating device is also connected to the partial discharge control system; the temperature sensor and the heating plate are connected to the temperature control system. The evaluation method can make a more accurate evaluation of the thermal aging state and electrical aging state of the traction transformer insulating oil, and the test platform can obtain insulating oil samples under different thermal aging and electrical aging states.
Description
technical field [0001] The invention belongs to the field of transformer insulation state evaluation, and in particular relates to a method for evaluating the aging state of traction transformer insulating oil. Background technique [0002] As the insulating medium of many oil-immersed high-voltage power equipment, insulating oil plays the role of insulation, heat dissipation, and arc suppression. The insulating oil of traction transformer is continuously aged under the action of physical and chemical factors such as heat and electricity during long-term operation. The aging of insulating oil will change the kinematic viscosity, acid value and dielectric loss of the oil, which will affect the normal operation of power equipment. The aging of transformer oil is a complex physical and chemical change process, which is mainly divided into thermal oxygen aging and electrical aging. At present, the aging state of insulating oil is mainly judged by the acid value in the oil and t...
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IPC IPC(8): G06Q10/06G06F17/16G01N30/02G01R31/12
CPCG01N30/02G01R31/1281G06F17/16G06Q10/0639
Inventor 黎枝鑫郭蕾王东张玉琳鲁扬
Owner SOUTHWEST JIAOTONG UNIV