A method for damp test of bushing inner insulation under impact load

A shock load and internal insulation technology, which is applied in the direction of instruments, test dielectric strength, and measurement devices, can solve the problems of long test time and inability to effectively obtain the frequency domain dielectric spectrum and difference of bushing under shock load.

Active Publication Date: 2018-12-25
SOUTHWEST JIAOTONG UNIV
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Problems solved by technology

[0003] The traction load is impactful, which causes a significant difference in the moisture distribution of the main insulation of traction transformer bushings and that of ordinary power transformer bushings, which has a great impact on the effective evaluation of the damp state of the main insulation of traction transformer bushings.
However, in actual engineering, the moisture distribution in the oil-paper insulation of oil-immersed casing is always changing dynamically under the action of impact load. The existing frequency-domain dielectric response test method takes a long time to test the low-frequency part, and cannot Effectively obtain the frequency-domain dielectric spectrum of the transient distribution of moisture in the bushing insulation under the impact load, and then it is impossible to study the evaluation of the damp state of the main insulation of the bushing under the impact load, so there is an urgent need for a method for the damp test of the inner insulation of the bushing under the impact load

Method used

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  • A method for damp test of bushing inner insulation under impact load
  • A method for damp test of bushing inner insulation under impact load
  • A method for damp test of bushing inner insulation under impact load

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Embodiment Construction

[0035] The present invention is further explained below in conjunction with accompanying drawing:

[0036] figure 1 Shown is the method flow chart of the insulation damp test in the bushing under the impact load; figure 2 Shown is the experimental platform for the method of realizing the damp test method of the insulation in the bushing under the impact load; image 3 It is a schematic diagram of the structure of the capacitor core; Figure 4 Shown is a schematic diagram of the drive rod structure.

[0037] Depend on figure 1 It can be seen that the method of the insulation damp test in the bushing under the impact load includes the following steps:

[0038] The first step: build the experimental platform

[0039] Build a frequency-domain dielectric spectrum experiment platform for the inner insulation of the damp bushing under impact load, which is composed of capacitor core 8, electric drive system, dielectric spectrum test system, moisture distribution test system, an...

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Abstract

The invention discloses a method for testing the dampness of the bushing inner insulation under an impact load. Due to the impact of the traction load, there is an obvious difference between the moisture distribution of the main insulation of the traction transformer bushing and the distribution of the insulation moisture of the ordinary power transformer bushing. The effective evaluation of the damp state of the main insulation of the bushing has brought a great impact. According to the experimental method provided by the present invention, the transient distribution state of the casing insulation moisture under the impact load can be simulated, and the casing insulation moisture distribution can be obtained when the moisture is transiently distributed. frequency-domain dielectric spectrum.

Description

technical field [0001] The invention belongs to the field of bushing insulation state evaluation, and in particular relates to a method for the damp test of bushing inner insulation under impact load. Background technique [0002] The bushing is an important accessory device of the traction transformer, and its insulation status is of great significance to the safe and reliable operation of the transformer. During service, traction transformer bushings have been tested by multiple factors such as electricity, moisture, heat, and mechanical stress for a long time, resulting in continuous deterioration of its insulation state. Therefore, long-term and effective monitoring of its insulation state is required during operation. At present, the frequency-domain dielectric spectrum method based on the dielectric response theory has been widely used in the field of bushing insulation status evaluation due to its wide measurement frequency band, rich insulation information, strong an...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): G01R31/12G01R31/00
Inventor 周利军刘伟迪王东阳郭蕾陈雪骄
Owner SOUTHWEST JIAOTONG UNIV
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