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A Method for Evaluating Uneven Aging State of Main Insulation of Oil-impregnated Paper Bushing

A technology of aging state and insulation state, applied in the direction of instruments, testing dielectric strength, measuring devices, etc., can solve the problem of not considering uneven diffusion, etc., and achieve the effect of reliable operation

Active Publication Date: 2021-11-23
广西博电科技有限公司
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Problems solved by technology

However, the traditional X model does not consider the non-uniform diffusion of the internal temperature field during the actual operation of the oil-immersed paper casing

Method used

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  • A Method for Evaluating Uneven Aging State of Main Insulation of Oil-impregnated Paper Bushing
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  • A Method for Evaluating Uneven Aging State of Main Insulation of Oil-impregnated Paper Bushing

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Embodiment Construction

[0040] The preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings to be more readily understood by those skilled in the art, so that the scope of the invention will be more clearly defined.

[0041] In this embodiment, an oil immersion paper casing main insulation is uneven aging state assessment method, including the following steps:

[0042] (1) The oil-paper insulation system of the oil-paper insulation of the oil-immersion paper casing in a uniform aging state is derived from the traditional X model structure, and the structure and mathematical expression of the traditional X model are obtained. figure 1 The derived process of the main insulation equivalent structure of the oil immersion paper casing. The traditional X model structure is derived by simplifying the capacitance core structure of the oil immersion paper casing, and the insulating material and insulating oil are combined in series to obtain a con...

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Abstract

A method for evaluating the uneven aging state of the main insulation of oil-immersed paper bushings disclosed by the present invention comprises the following steps: (1) Obtain the structure and mathematical expression of the traditional X model through the derivation of the traditional X model structure; (2) Obtain The temperature field on the main insulation of the oil-impregnated paper bushing; (3) Obtain the aging state of the insulating paper layer on the main insulation under the diffusion temperature field; (4) Construct the equivalent structure of the modified X model; (5) Calculate the Mathematical expressions of the modified X model for two insulation states, three insulation states, and four insulation states; (6) Obtain the general expression of the modified X model including multiple aging states; (7) Obtain FDS data; (8 ) Establish the FDS database of the uneven aging state of the main insulation of the oil-impregnated paper bushing. The invention considers the non-uniform diffusion phenomenon in the internal temperature field during the actual operation of the oil-immersed paper bushing, and the diagnosis is more convenient and accurate, so that the operation of the power system is more reliable, safe and stable.

Description

Technical field [0001] The present invention relates to the field of electrical equipment fault diagnosis, and more particularly to an immersable aging state assessment method of an oil immersion paper casing. Background technique [0002] The high pressure sleeve is an important part of the electric equipment such as the electric transformer, the circuit breaker. At present, the most widely used high-pressure sleeve in the grid is used in the oil absorbing insulation structure, which is an oil-immersed paper casing. The high-pressure sleeve is faulty, which will have an important impact on the electrical network of transformers and associated electrical networks. When the oil immersion paper sleeve is in normal operation, its main insulation will be affected by a variety of stress synergies such as hot field, oxygen, moisture, electric field, organic acid, and mechanical vibration. The main insulation oil insulating system is gradually aging, The aging of the paper layer directl...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/12
CPCG01R31/1263
Inventor 刘捷丰张镱议
Owner 广西博电科技有限公司
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