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Device and method for observing dynamic behaviors of impurities with different particle sizes in oil duct of transformer

A technology of transformer oil and dynamics, which is applied in the field of devices for observing the dynamic behavior of impurities with different particle sizes in the transformer oil channel, and can solve problems such as incapable of intelligent monitoring

Active Publication Date: 2021-06-08
CHINA UNIV OF MINING & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

However, when the transformer is actually working, there are impurities of different particle sizes in the oil passage, and the mechanical behavior of impurities of each particle size is different in the oil passage. The intelligent monitoring of dynamic behavior provides technical support and theoretical basis

Method used

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  • Device and method for observing dynamic behaviors of impurities with different particle sizes in oil duct of transformer
  • Device and method for observing dynamic behaviors of impurities with different particle sizes in oil duct of transformer
  • Device and method for observing dynamic behaviors of impurities with different particle sizes in oil duct of transformer

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Embodiment

[0068] Taking an oil-immersed transformer with a rated capacity of 630kVA and a rated voltage of 10kV as an example, the load loss of the next phase in the rated state is 3150W, and the rated no-load loss is P 0 =630W, rated short-circuit loss P k =2520W, the number of winding cakes for simulating the transformer winding model n=10, the inner diameter of the winding cake r in =690mm, outer diameter r out =790mm, central angle is 20°, the radial width of the winding cake W disc =90mm, the height H of a single winding cake disc = 12mm, time delay Δt = 10μs, the maximum laser pulse emission power P of the double-headed laser source e =20000kW, the distance L from the CCD camera to the observed oil passage c =0.2m, the distance L from the double-headed laser source to the observed oil passage s = 0.18m, the specified particle diameter d at the maximum laser pulse emission power 0 =0.15mm, the experimental operation method includes the following steps:

[0069] Step 1: Ins...

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Abstract

The invention relates to a device and a method for observing dynamic behaviors of impurities with different particle sizes in an oil duct of a transformer, and the device comprises a winding model, a particle dynamic observation system, an oil tank, a cooling fin, a particle emitter, a fixed-mesh screen and a direct-current power supply module. The output power of the direct-current power supply module for heating the winding cake is defined. Parameters of a winding cake are defined, the aperture of a fixed-mesh screen is adjusted, and the power of a double-head laser source corresponding to the aperture of the fixed-mesh screen is defined. The dynamic behaviors of the impurities with different particle sizes in the oil duct of the transformer under the actual working condition can be effectively observed, the relationship between the dynamic behaviors of the impurities with different particle sizes and the partial discharge of the transformer insulating oil can be researched, and the insulating performance of the transformer can be further researched.

Description

technical field [0001] The invention relates to a device and method for observing the dynamic behavior of impurities with different particle sizes in a transformer oil passage. It belongs to the technical field of high-end intelligent transformers. Background technique [0002] Transformer is an important power transmission and transformation equipment in the power system. With the improvement of grid voltage level and the development of smart grid, the difficulty of manufacturing power transformers also increases. An important aspect of high-end intelligent power transformers is the intelligent monitoring of the insulation performance of power transformers, and the insulation performance of power transformers largely depends on the quality of transformer oil, so it is very important to intelligently monitor transformer oil. [0003] In the manufacturing, installation, operation and maintenance of power transformers, the transformer oil will be doped with impurity particles...

Claims

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Application Information

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IPC IPC(8): G01D21/02H01F27/12
CPCG01D21/02H01F27/12
Inventor 张建文王冬伟王路伽马晓华胡雪
Owner CHINA UNIV OF MINING & TECH
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