Resistance measurement method for shielding layer of hydrogenerator stator bar

A stator bar, resistance value measurement technology, applied in measuring devices, measuring electrical variables, measuring resistance/reactance/impedance, etc. Measurement and other issues to achieve the effect of reducing the dielectric loss value

Active Publication Date: 2016-03-23
HARBIN ELECTRIC MASCH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Because the inner shield is inside the stator bar, the resistance value of the shielding layer of the stator bar after processing cannot be measured, and the resistance value of the stator bar shielding layer cannot be studied in depth

Method used

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  • Resistance measurement method for shielding layer of hydrogenerator stator bar
  • Resistance measurement method for shielding layer of hydrogenerator stator bar
  • Resistance measurement method for shielding layer of hydrogenerator stator bar

Examples

Experimental program
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Embodiment Construction

[0014] A method for measuring the resistance of the shielding layer of the stator bar of the hydroelectric generator:

[0015] a. If figure 1 As shown, the stator bar is formed by transposition and insulation bonding of the electromagnetic wire to form the stator bar wire 1, and the lead wire 2 at both ends of the stator bar wire is removed from the insulation and welded into a whole;

[0016] b. Conduct copper leakage treatment at 3 intervals of 100mm at the transposition of the stator bar wire, that is, remove about 2mm2 of the electromagnetic wire insulation at the position to be treated, and leak the internal copper conductor;

[0017] c. If figure 2 As shown, after the copper leakage treatment of the stator bar wire, the low-resistance anti-corona tape is half-folded on the stator bar wire 1, and the low-resistance anti-corona tape is wrapped to form the shielding layer 4, and the two ends of the shielding layer are lower than the stator wire 100mm in length at both en...

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Abstract

The invention provides a resistance measurement method for a shielding layer of a large hydrogenerator stator bar. The resistance of the shielding layer of the processed and molded stator bar can be measured by a lead-out copper bar; and the dielectric loss value of the stator bar can be reduced after the lead-out copper bar is connected with a stator bar outgoing line.

Description

Technical field: [0001] The invention relates to the technical field of large-scale hydraulic generator stator bar manufacturing, in particular to a resistance measurement of a shielding layer in a shielding layer insulation structure of a stator bar. Background technique: [0002] The dielectric loss value of the stator bar of a large hydroelectric generator is an important indicator of the performance of the bar. In order to reduce the dielectric loss value of the stator bar, the insulation structure design of the stator bar can use a low-resistance shielding layer to shield the air gap discharge at the transposition of the stator bar wire. Because the inner shield is inside the stator bar, the resistance value of the shielding layer of the stator bar after processing cannot be measured, and the resistance value of the stator bar shielding layer cannot be studied in depth. In order to measure the resistance value of the shielding layer, a method for measuring the shieldin...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H02K15/00G01R27/02
CPCG01R27/02H02K15/00
Inventor 黄程伟徐冰付强满宇光孙永鑫冯超张秋寒郑伟李振海
Owner HARBIN ELECTRIC MASCH CO LTD
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