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Identification method and system for transformer winding material

A technology of transformer winding and identification method is applied in the field of identification method and system of transformer winding material, which can solve the problems of complexity, large economy, hidden safety hazards in the operation of transformer power system, etc. The effect of applying value

Pending Publication Date: 2019-01-25
南京荣港电气技术有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The low performance of this kind of transformer will bury safety hazards in the operation of the power system and cause large economic losses.
The traditional identification method is realized by opening the transformer and destroying its winding insulation. This method is undoubtedly complicated and expensive.

Method used

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  • Identification method and system for transformer winding material
  • Identification method and system for transformer winding material

Examples

Experimental program
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Effect test

Embodiment 1

[0017] Embodiment 1, heat one-phase tap of multi-tap transformer 1 by heating device 3, so as to reach the heating of transformer winding 1-2, install temperature sensor 4 at one-phase tap place, in order to measure temperature, when temperature reaches 160 At ~220°C, use a high-precision DC voltmeter 5 to measure the thermoelectric potential of the entire circuit in the multi-tap transformer 1. The thermoelectric potential of the entire circuit is equal to the sum of the thermoelectric potentials at the junctions 01-06. Usually, 01, 02, 05, and 06 The materials at all are the same material, so the sum of the total thermoelectric potential: U=U 03 + U 04 , If the thermoelectric potential is below 80uv, the winding material is all made of copper; if the thermoelectric potential is above 80uv, the winding material is made of copper mixed with aluminum.

[0018] In this embodiment, when the heating device 3 is used for heating, the monitoring unit 2 receives the temperature meas...

Embodiment 2

[0019] Embodiment 2, heat the ends of the conductive rods 1-3 of the multi-tap transformer 1 through the heating device 3, according to the thermoelectric effect theory, use a high-precision DC voltmeter 5 to measure the thermoelectric potential of the entire loop in the multi-tap transformer 1, the entire loop The thermoelectric potential is equal to the sum of the thermoelectric potential at the junction of 01~06. Usually, the materials at 01, 02, 05, and 06 are all the same material, so the total thermoelectric potential sum: U=U 03 + U 04 , Install temperature sensors at the head and tail of the transformer winding to measure the temperature. Based on the Seebeck effect theory, it can be drawn that U=(SCu-Swindings)(T03-T04). Therefore, if the materials are all copper, then U =0; and if it is copper doped with aluminum, then U=(SCu-Al)(T03-T04), when the temperature difference between the head and the tail of the transformer winding is 30°C, if the thermoelectric potential...

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Abstract

The invention relates to an identification method and system for a transformer winding material. The method comprises the steps of heating taps or conductive rods of a multi-tap transformer through utilization of heating equipment; measuring temperature difference between heads and tails of windings in the multi-tap transformer and a thermoelectric potential loop of the multi-tap transformer; andidentifying the transformer winding material based on a seebeck effect theory. The identification system comprises the multi-tap transformer, wherein the multi-tap transformer comprises a cabinet body, a plurality of windings which are set in the cabinet body and are connected in series, the conductive rods, and connection copper bars connected with the taps of the winding and the conductive rods.The identification system also comprises a monitoring unit, and the heating equipment, temperature sensors and a high precision direct current voltage meter which are connected with the monitoring unit. The method and the system have the advantages that a structure of the transformer does not need to be destroyed, the winding material of the transformer can be effectively identified, cost can beeffectively reduced, detection efficiency is improved, and the method and the system have relatively wide market application value.

Description

technical field [0001] The invention relates to the field of electric equipment detection, in particular to a method and system for identifying transformer winding materials. Background technique [0002] In power systems, in order to meet the requirements of electrical characteristics and mechanical characteristics, copper and aluminum are usually used as the main materials of transformer windings. In practical applications, copper tends to have better performance but compared to aluminum, the price of copper is higher than that of aluminum. Therefore, some manufacturers often reduce costs by doping copper with aluminum in the winding of the transformer. The low performance of this kind of transformer will bury safety hazards in the operation of the power system and cause large economic losses. The traditional identification method is realized by opening the transformer and destroying its winding insulation. This method is undoubtedly complicated and expensive. Contents...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01N25/00
CPCG01N25/00
Inventor 孙勇陆兵沈凯
Owner 南京荣港电气技术有限公司