Power distribution dry-type transformer winding material real-time imaging non-destructive detection method and power distribution dry-type transformer winding material real-time imaging non-destructive detection apparatus

Abstract

The invention discloses a power distribution dry-type transformer winding material real-time imaging non-destructive detection method and a power distribution dry-type transformer winding material real-time imaging non-destructive detection apparatus. The method comprises: placing a flat plate detector on one side of the winding of a detected dry-type transformer in advance, and fixing an image quality indicator on the surface of the flat plate detector; emitting radiation ray at the other side of the winding of the detected dry-type transformer to obtain the image of the image quality indicator, determining the image quality level in the image quality indicator imaging, and determining that the detected dry-type transformer winding material is copper if the image quality level in the image quality indicator imaging is the image quality level corresponding to copper; and determining that the detected dry-type transformer winding material is aluminum if the image quality level in the image quality indicator imaging is the image quality level corresponding to aluminum. The apparatus comprises a radiation source, a scattered ray shielding cover, the flat plate detector, and the image quality indicator. According to the present invention, the internal material of the winding can be subjected to type detection without the disassembly, and the advantages of simpleness, easy use, no limitation by the place and the equipment, and rapid and efficient detection are provided.

Description

technical field [0001] The invention relates to a detection technology for the winding material of a power distribution dry-type transformer, in particular to a real-time imaging non-destructive detection method and device for the winding material of a power distribution dry-type transformer. Background technique [0002] In the power system, especially the distribution network, more and more dry-type transformers are used as the distribution network transformer. According to statistics, among the distribution transformers used in developed countries, the proportion of dry-type transformers has reached 50%. Only 40% to 50% of large and medium-sized cities in my country. Compared with oil-immersed transformers, dry-type transformers have the characteristics of no oil, fire prevention, long life, low noise, simple maintenance, safety and reliability, so the application and development of dry-type transformers have broad space in our country. [0003] The insulating resin enc...

AI Technical Summary

Problems solved by technology

These tests have been studied in depth at home and abroad, but the test results are difficult to distinguish whether the power transformer winding uses copper wire or aluminum wire.

At present, the equipment management department usually detects the wire type by destroying the winding insulation after the suspension cover is disassembled. This method is time-consuming, labor-intensive, inaccurate and irreversible.

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