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An experimental method for dielectric spectrum testing of different aging oil-immersed bushings

A test experiment, oil-immersion technology, applied in the direction of measuring devices, measuring electrical variables, measuring device casings, etc., to achieve the effect of improving applicability and accuracy

Active Publication Date: 2019-02-15
YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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Problems solved by technology

[0004] However, the current diagnostic methods are mainly aimed at the aging diagnosis of transformers, and the inner insulation of oil-immersed bushings is made of alternately wound multi-layer insulating paper and aluminum foil. There are few reports on the aging degree of the insulation in the immersion bushing, which is a key problem that needs to be solved when the dielectric spectrum method is applied to the on-site diagnosis of the insulation aging degree in the oil-immersed bushing

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  • An experimental method for dielectric spectrum testing of different aging oil-immersed bushings
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  • An experimental method for dielectric spectrum testing of different aging oil-immersed bushings

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[0033] The accompanying drawings, which are incorporated in and constitute a part of this specification, illustrate embodiments consistent with the application and together with the description serve to explain the principles of the application.

[0034] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, for those of ordinary skill in the art, In other words, other drawings can also be obtained from these drawings on the premise of not paying creative work.

[0035] see figure 1 , is a flow chart of the dielectric spectrum testing experimental method for different aging oil-immersed bushings provided by this application.

[0036] The application provides a dielectric spectrum testing experimental method for different aging oil-immersed casings, the method comprising th...

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Abstract

The invention belongs to the field of insulation evaluation and diagnosis of an oil-immersed bushing and particularly relates to a dielectric spectroscopy test experiment method for an oil-immersed bushing under different aging. The method comprises steps: an oil-immersed bushing aging platform is built; the oil-immersed bushing is subjected to aging processing; temperature of an upper porcelain sleeve, a flange and a lower porcelain sleeve of the oil-immersed bushing is measured; according to the measured temperature, the temperature of an inner hot spot of the oil-immersed bushing is estimated; and according to the inner hot spot temperature, the degree of polymerization of inner insulation of the oil-immersed bushing is estimated; and the dielectric spectroscopy of the oil-immersed bushing is tested. The relationship between a frequency domain dielectric spectroscopy test result and oil immersed bushing aging can be effectively studied, the accuracy of diagnosing the insulation aging degree inside the oil-immersed bushing by the frequency domain dielectric spectroscopy method can thus be improved, and the applicability of the frequency domain dielectric spectroscopy method in field test and the operation safety and the operation stability of the oil-immersed bushing are improved.

Description

technical field [0001] The application belongs to the field of insulation evaluation and diagnosis of oil-immersed bushings, and in particular relates to an experimental method for dielectric spectrum testing of different aged oil-immersed bushings. Background technique [0002] The oil-immersed bushing is an important component of the power transformer. It plays the role of connecting the high and low voltage leads of the transformer with the external power system, and at the same time plays the role of insulating the leads from the metal shell of the transformer. It is an important part of the power system. Its internal insulation The quality of the performance seriously affects the safety and stability of the power system. The inner insulation of the oil-immersed bushing is composed of insulating paper and insulating oil. During the operation of the oil-immersed bushing, a large current passes through the central conduit for a long time, which causes a large amount of hea...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R27/26G01R1/04
CPCG01R1/04G01R27/2635
Inventor 徐肖伟邹德旭王科谭向宇周仿荣彭晶项恩新申元
Owner YUNNAN POWER GRID CO LTD ELECTRIC POWER RES INST
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