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Dry-type reactor

A dry-type reactor and pillar insulator technology, applied in the direction of preventing/reducing unwanted electric/magnetic effects, etc., can solve the problems of uneven electric field intensity at the coil end, burning of insulation defects of wire turns, and easy occurrence of shock discharge. , to achieve the effect of reducing inductance, avoiding discharge and ensuring stability

Active Publication Date: 2010-06-09
TBEA SHENYANG TRANSFORMER GRP CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] Each shielding ring of the existing air-core reactor is divided into two sections, which are grounded separately. Since the length of each shielding ring is greater, the inductance it has is greater, and impulse discharges are prone to occur between the two sections; the post insulators The system is a multi-group post insulator connected without any intermediate support. This structure has weak earthquake resistance and is not safe for system operation; its busbar directly contacts the coil and the busbar structure has no noise reduction measures.
Some were burnt due to insulation defects of wire turns just after they were put into operation
In the past, the bus bar was a plate structure, which was welded by a plurality of metal plates pressed into a plate shape. The narrow surface of the plate faces the coil and the contact surface with the coil is very small (15mm), resulting in uneven electric field strength at the end of the coil. In actual operation There is a local concentration of field strength, causing discharge along the tree branches

Method used

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Examples

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Embodiment 1

[0029] Embodiment 1: as figure 1 , figure 2 As shown, the structure of the present invention includes a coil 3, a shielding device 1 and a post insulator device 4, the two ends of the coil 3 are symmetrically equipped with a shielding device 1, and the two shielding devices 1 are connected by micelles, and the micelles are placed inside the coil. The number is determined by the short-circuit strength of the coil. A post insulator device 4 is installed at the lower part of the shielding device 1 at the lower end of the coil.

[0030] The coil 3 of the present invention includes an encapsulation 5 and an airway strut 8, such as Figure 4 As shown, the encapsulation 5 is placed side by side by a number of insulated aluminum strands 29, and insulating micelles are placed on the end, inner diameter and outer diameter side of the seal to form a parallel structure of multi-layer wires, such as image 3 As shown; the upper and lower envelope ends 6 of the envelope 5 are sealed into...

Embodiment 2

[0036] Embodiment 2: as figure 1 , figure 2 As shown, the structure of the present invention includes a coil 3, a shielding device 1 and a post insulator device 4. The shielding device 1 is symmetrically installed at both ends of the coil 3, and the two shielding devices 1 are connected by micelles. The micelles are placed inside the coil, and at one end of the coil A post insulator device 4 is installed on the lower part of the shielding device 1 .

[0037] Coil 3 of the present invention such as Figure 4 As shown, the structure is the same as that of the coil in Example 1. When the airway width H between the coils enclosing 5 is 30 mm, the upper base a of the trapezoid is 6 mm, and the lower base b is 15 mm, as Image 6 shown. The inner layer insulating film 10, the outer layer insulating film 12 and the insulating layer 11 of the aluminum stranded wire adopt heat-resistant class F class insulating materials according to different voltage levels.

[0038] Such as Fig...

Embodiment 3

[0042] Embodiment 3: as figure 1 , figure 2 As shown, the structure of the present invention includes a coil 3, a shielding device 1 and a post insulator device 4. The shielding device 1 is symmetrically installed at both ends of the coil 3, and the two shielding devices 1 are connected by micelles. The micelles are placed inside the coil, and at one end of the coil A post insulator device 4 is installed on the lower part of the shielding device 1 .

[0043] Coil 3 of the present invention such as Figure 4 As shown, the structure is the same as that of the coil in Example 1. When the airway width H=25mm between the coils enclosing 5, the upper base a of the trapezoid is 3 mm, and the lower base b is 6 mm, as Image 6 shown. The inner layer insulating film 10, the outer layer insulating film 12 and the insulating layer 11 of the aluminum stranded wire adopt heat-resistant class B, F, H class insulating materials according to different insulating temperature classes.

[00...

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Abstract

The invention relates to one dry reactor, which comprises coil, shield device and column isolation device, wherein, the coil two ends are symmetrically set with shield devices connected by glue beam inside coil; the coil down end shield device is fixed with column isolation device. The invention has the following advantages: lowering coil end electrical field; avoiding long time product operationdust pile up; ensuring reliable operation; improving the shield device distribution.

Description

technical field [0001] The invention belongs to the technical field of reactors, in particular to a dry-type reactor. Background technique [0002] Each shielding ring of the existing air-core reactor is divided into two sections, which are grounded separately. Since the length of each shielding ring is greater, the inductance it has is greater, and impulse discharges are prone to occur between the two sections; the post insulators The system is connected by multiple sets of post insulators without any intermediate support. This structure has weak earthquake resistance and is not safe for system operation; its busbar directly contacts the coil and the busbar structure has no noise reduction measures. Some have just been put into operation and burnt due to insulation defects of wire turns. In the past, the bus bar was a plate structure, which was welded by a plurality of metal plates pressed into a plate shape. The narrow surface of the plate faces the coil and the contact s...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01F27/36
Inventor 任玉民王健付铁军谷春臻
Owner TBEA SHENYANG TRANSFORMER GRP CO LTD
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