10.5kV 4100-meter high-altitude hydro-generator insulation structure

A technology of hydroelectric generator and insulation structure, which is applied to the shape/style/structure of winding insulation, which can solve the problems of shortening the operating life of the unit and the partial discharge of the coil, so as to improve the stator insulation structure and anti-corona structure, Effect of reducing air gap and internal discharge and prolonging operating life

Inactive Publication Date: 2013-11-20
SICHUAN DONGFENG ELECTRIC MACHINARY WORKS CO LTD
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  • Abstract
  • Description
  • Claims
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Problems solved by technology

[0004] The power station at an altitude of 4100m is currently the highest unit in Asia. Due to the thin air, the coil is prone to partia

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  • 10.5kV 4100-meter high-altitude hydro-generator insulation structure

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Embodiment Construction

[0015] The present invention will be further described below in conjunction with accompanying drawing, protection scope of the present invention is not limited to the following:

[0016] Such as figure 1 As shown, the insulation structure of a 10.5kV class 4100-meter high-altitude hydro-generator includes an iron core 1 and a coil 2. The outer surface of the coil 2 is provided with low resistance along the direction from the side near the end of the wire slot to the terminal of the coil 2. Structure and high resistance structure, the low resistance structure includes a low resistance band 3 wrapped on the outer surface of the coil 2 and a low resistance paint layer 4 coated on the outer surface of the low resistance band, the high resistance structure is included in the coil 2 The high-resistance band 5 wrapped on the outer surface and the high-resistance paint layer 6 coated on the outer surface of the low-resistance band overlap the edges of the high-resistance structure and...

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Abstract

The invention discloses a 10.5kV 4100-meter high-altitude hydro-generator insulation structure, which comprises an iron core (1) and a coil (2), wherein the outer surface of the coil (2) is provided with a low-resistance structure and a high-resistance structure, the low-resistance structure comprises a low-resistance band (3) which wraps the outer surface of the coil (2) and a low-resistance paint layer (4) which is coated on the outer surface of the low-resistance band, and the high-resistance structure comprises a high-resistance band (5) which wraps the outer surface of the coil (2) and a high-resistance paint layer (6) which is coated on the outer surface of the high-resistance band, and the edge of the high-resistance structure is in lap joint with the edge of the low-resistance structure. The hydro-generator insulation structure has the beneficial effects that through a stator coil insulation process and an anti-corona process, the stator insulation structure and the anti-corona structure are improved, the surface potential of the stator coil is reduced, the stability of the surface potential of the coil is maintained, the concentration of the local potential is avoided, the unit is guaranteed to run normally in the high-altitude environment, the discharging problem in running can be solved, and the service life of the unit can be prolonged.

Description

technical field [0001] The invention relates to the technical field of generator insulation structures, in particular to the insulation structure of a 10.5kV class 4100-meter high-altitude water turbine generator. Background technique [0002] There are mainly two manufacturing systems for stator coils of hydro-generator sets: multi-glue molding and less-glue VPI. The overall performance of the less-glue VPI system is better. Most of the resins are imported epoxy-acid anhydride systems. This impregnated resin is easier to absorb moisture, is not easy to store, and has a higher cost. [0003] The anti-corona at the end of the coil is mainly to use silicon carbide powders with different resistances on the surface of the coil to form a reasonable voltage gradient to ensure the uniform transition of the coil end along the surface potential, so as to achieve the anti-corona effect structure. Silicon carbide can be adjusted into paints with different resistance values ​​for anti-...

Claims

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Application Information

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IPC IPC(8): H02K3/34H02K3/38H02K3/40
Inventor 李建李泽端魏雄强彭启玉陈旭平易桂林
Owner SICHUAN DONGFENG ELECTRIC MACHINARY WORKS CO LTD
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