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Experimental facility and method for electric heating combined stress aging with oil-paper insulation of transformer

A technology of transformer oil and experimental device, applied in the direction of transformer/inductor coil/winding/connection, insulator, measuring device, etc., can solve problems such as inability to apply electricity at the same time, difficulty in sampling, etc.

Active Publication Date: 2013-03-06
ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY +1
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Problems solved by technology

[0005] Aiming at the common problems in the existing experimental platform when simulating the aging process of oil-paper insulation, the joint stress of electricity and heat cannot be applied at the same time, sampling is difficult, high-temperature sealing, etc., and the present invention proposes an experimental device for oil-paper insulation electric heat combined stress aging of transformers and method, it is simple in structure, effective in use, safe in operation and convenient in sampling

Method used

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  • Experimental facility and method for electric heating combined stress aging with oil-paper insulation of transformer
  • Experimental facility and method for electric heating combined stress aging with oil-paper insulation of transformer
  • Experimental facility and method for electric heating combined stress aging with oil-paper insulation of transformer

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Embodiment Construction

[0048] The present invention will be further described below in conjunction with accompanying drawing:

[0049] figure 1 It is the overall structure diagram of the experimental device of the present invention. It can be seen from the figure that the transformer oil-paper insulation electrothermal combined accelerated aging experimental device consists of an outer chamber 1, an inner chamber 2 arranged inside the outer chamber 1, and a voltage and current measurement and display system 5.

[0050] The inner cavity 2 is composed of a glass sample bottle 10 with a cylindrical structure, an insulating plate 7 arranged on the upper end of the cylindrical glass sample bottle 10, a stainless steel bottom plate 11 arranged at the bottom of the cylindrical glass sample bottle 10, connecting and fixing the insulating plate 7 and the stainless steel bottom plate 11 stainless steel screw rod 9, the high-temperature-resistant nitrile rubber sealing gasket 8 arranged on the lower surface of...

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Abstract

The invention relates to an experimental facility and method for electric heating combined stress aging with oil-paper insulation of a transformer, wherein the facility has the advantages of simple structure and good use effect, is safe in running and convenient in sampling. The experimental facility comprises an outer cavity which is internally provided with at least one sealed inner cavity; the inner cavity is internally provided with a testing device which is provided with a high-voltage electrode and a low-voltage electrode; a sample is arranged between the high-voltage electrode and the low-voltage electrode which are mutually pressed; and the high-voltage electrode is connected with a high-voltage power supply and a current measurement and display system outside the outer cavity respectively.

Description

technical field [0001] The invention belongs to the technical field of transformer aging state detection, and in particular relates to an experimental device and method for transformer oil-paper insulation electrothermal combined stress aging. Background technique [0002] Transformers, especially large oil-immersed power transformers, are one of the most important equipment in the power system. Their operational reliability is directly related to the safety and stability of the power system. Statistics show that the operation accidents of transformers are mainly caused by the faults of their insulation systems. Transformers The operating life of the oil-paper insulation system depends largely on the aging state of the oil-paper insulation system. Therefore, accurately diagnosing the aging state of the oil-paper insulation system is crucial to predicting the life of the transformer, and it is also the premise and basis for realizing the condition maintenance of the transform...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/12G01R1/02G01R1/04H01F27/32H01B17/58
Inventor 陈玉峰尹奎龙朱文兵王世强张冠军慕世友辜超
Owner ELECTRIC POWER RESEARCH INSTITUTE OF STATE GRID SHANDONG ELECTRIC POWER COMPANY
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