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500kV wire outlet device for extra-high voltage transformer

A transformer and UHV technology, applied in the field of 500kV outlet devices for UHV transformers, can solve problems such as high operator skill level requirements, difficult bushing coordination, complex structure, etc., to improve the electric field distribution of lead wires, high insulation reliability, The effect of low skill requirements

Pending Publication Date: 2020-03-24
WUJIANG TRANSFORMER CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the influence of factors such as the insulation strength of the lead wire and the voltage level of the lead wire, the shape of the lead wire electrode, the insulation structure of the lead wire, and the insulation distance of the lead wire, UHV transformers are limited by transportation conditions, and the outer limit size of the fuel tank and the transportation weight of the product must be strictly controlled. The 500kV outgoing line in the transformer adopts the structure of copper pipes, copper rods with outer insulation and multi-layer insulation tubes, or the structure of shielding tubes wrapped with insulating pulp and then adding multi-layer insulation tubes. The structure is complex and requires high skill levels of operators. The bushing is difficult to fit and the cost is high. Therefore, it is particularly important to design a 500kV outlet structure with high insulation reliability, simple structure, and easy installation and operation in a limited space.

Method used

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  • 500kV wire outlet device for extra-high voltage transformer

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Embodiment Construction

[0014] The technical solution of the present invention will be further described in detail below in conjunction with the accompanying drawings.

[0015] A 500kV outlet device for UHV transformers includes a first shielding cylinder 1 , a second shielding cylinder 2 , a third shielding cylinder 3 and a pressure equalizing ball 7 . The third shielding cylinder 3 is μ-shaped, and is connected with the first shielding cylinder 1 and the second shielding cylinder 2 through a connecting device, the first shielding cylinder 1 and the third shielding cylinder 3 are connected through a connecting device 4, and the second shielding cylinder 3 is connected with the connecting device 4. The cylinder 2 and the third shielding cylinder 3 are connected through a connecting device 5 .

[0016] After each shielding tube is connected, an insulating layer 6 with a certain thickness is covered outside. The connecting fastener 10 is used to install the third shielding cylinder 3 and the pressure ...

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Abstract

The invention relates to a 500kV wire outlet device for an extra-high voltage transformer, which solves the problem of electric field concentration caused by a 500kV lead, improves the electric fielddistribution of the lead, and ensures the insulation reliability of the lead and a 1000kV coil, an oil tank, an iron core and the like. The outgoing line device is simple in structure, does not need to be shielded and bound manually, does not have a complex insulating cylinder matching problem, and has low skill requirements for installation personnel. The wire outlet device can be adjusted, the position of a voltage-sharing ball can be adjusted in a rotating mode with the third shielding cylinder as the axis after the connecting device is loosened, meanwhile, the long circular installation hole in the voltage-sharing ball can be used for adjustment, it is guaranteed that the installed sleeve and the voltage-sharing ball are concentric, electric field distribution is more regular, and insulation reliability is higher.

Description

technical field [0001] The invention relates to a power transformer, in particular to a 500kV outlet device for an extra-high voltage transformer. Background technique [0002] The high-voltage A of the UHV autotransformer has an insulation level of 1000kV, and the medium-voltage Am has an insulation level of 500kV. The medium-voltage lead wires need to be connected in parallel at the end of the high-voltage winding Ak and Ak, and then connected with the first end of the medium-voltage winding Am1. Due to the influence of factors such as the insulation strength of the lead wire and the voltage level of the lead wire, the shape of the lead wire electrode, the insulation structure of the lead wire, and the insulation distance of the lead wire, UHV transformers are limited by transportation conditions, and the outer limit size of the fuel tank and the transportation weight of the product must be strictly controlled. The 500kV outgoing line in the transformer adopts the structur...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): H01F27/28H01F27/32H01F27/36H01F27/40
CPCH01F27/28H01F27/2828H01F27/324H01F27/36H01F27/40
Inventor 冯弼乾安振王连鹏刘成亮
Owner WUJIANG TRANSFORMER CO LTD
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