Multiple factors accelerated aging test apparatus and method for oil paper insulation of transformer

A transformer oil, accelerated aging technology, used in paper testing, measuring devices, instruments, etc., can solve complex problems

Inactive Publication Date: 2009-04-15
CHONGQING UNIV
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Problems solved by technology

The oil-paper insulation is an important part of the internal insulation of the oil-immersed transformer. In order to study and master the aging law of the transformer, the method of accelerated aging test is often used for research, but the existing technology is mainly thermal stress, electrical stress or mechanical stress. The single-factor aging research, the joint aging research of electrical, thermal and mechanical stress has not been reported so far, and the aging law of multi-factor aging is not a simple superposition of single-factor aging, it is much more complicated than single-factor aging, in order to obtain accurate test As a result, to grasp the aging law of oil-paper insulation, it is necessary to provide a transformer oil-paper insulation aging test device and method for the combined aging of three factors of electric-thermal-mechanical stress, but at present, there is no such test device and method in the prior art

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  • Multiple factors accelerated aging test apparatus and method for oil paper insulation of transformer

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Embodiment Construction

[0023] Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings.

[0024] Referring to Fig. 1, the transformer oil-paper insulation multi-factor accelerated aging test device of this preferred embodiment includes an electrothermal aging box 2, and the bottom of the inner cavity of the electrothermal aging box 2 is provided with a vibrating device 8, and the stainless steel box body 4 is arranged on the vibrating device 8 , can vibrate with the vibrating device, the upper cover of the stainless steel box 4 is an insulating sealing plate 7, and three silicon steel plates 5 are arranged at intervals in the stainless steel box 4 as ground electrodes. When the device is in use, the insulating paper 9 is pasted on the silicon steel On the plate 5, three coils are respectively wound and fixed on the outside of the insulating paper 9 as the high-voltage electrode 12, and insulating oil 13 is injected into the st...

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Abstract

The invention provides a testing device and a testing method of electricity-heat-mechanical stress three-factor combined ageing for transformer paper oil insulation ageing study; the testing device comprises an electric heating ageing oven, in which a transformer paper oil insulation simulator, a shake unit and a temperature control device used for controlling the temperature of the electric heating ageing oven. The shake unit can drive the simulator to vibrate, the simulator is electrically connected with a high-voltage power supply; the testing method includes vacuum drying and oil impregnation of insulating paper, attaching the paper to the earth electrode in a stainless steel case of the testing device, winding coils as a high voltage electrode outside the insulating paper and the earth electrode and injecting insulating oil to the stainless steel case; connecting a high tension lead with the high-voltage power supply and starting the shake unit; sampling the insulating paper and the insulating oil alternately and measuring insulation ageing parameters.

Description

technical field [0001] The invention relates to a transformer component detection device and method, in particular to a transformer oil-paper insulation multi-factor accelerated aging test device and a test method. Background technique [0002] The transformer is a very critical large-scale equipment in the power system, and its main fault is the insulation fault caused by long-term aging. The oil-paper insulation is an important part of the internal insulation of the oil-immersed transformer. In order to study and master the aging law of the transformer, the method of accelerated aging test is often used for research, but the existing technology is mainly thermal stress, electrical stress or mechanical stress. The single-factor aging research, the joint aging research of electrical, thermal and mechanical stress has not been reported so far, and the aging law of multi-factor aging is not a simple superposition of single-factor aging, it is much more complicated than single-...

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R31/00G01N33/34
Inventor 廖瑞金周湶杨丽君李剑杜林陈伟根孙才新梁帅伟
Owner CHONGQING UNIV
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