A UHV double-shielded composite bushing

A composite sleeve and double-shielding technology, applied in the direction of magnetic/electric field shielding, modification through conduction heat transfer, insulators, etc., can solve the problems of uneven internal electric field distribution, poor local heat dissipation performance, and reduced equipment reliability, etc., to achieve Avoid partial discharge, enhance heat dissipation, and reduce radio interference

Active Publication Date: 2019-09-06
CET AE POWER SHANDONG HIGH VOLTAGE SWITCHGEAR
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] At present, the 1100kV composite bushing has problems such as poor local heat dissipation performance, uneven internal electric field distribution, excessive local electric field strength, and low insulation margin, which reduces the reliability of safe operation of the equipment.

Method used

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  • A UHV double-shielded composite bushing
  • A UHV double-shielded composite bushing
  • A UHV double-shielded composite bushing

Examples

Experimental program
Comparison scheme
Effect test

Embodiment Construction

[0027] Such as Figure 1 to Figure 3 As shown, a UHV double-shielded composite bushing includes an intermediate conductor 7, an insulating sleeve 6 is sleeved on the outside of the intermediate conductor, and the insulating sleeve 6 and the end cover 4 are connected by bolts. The intermediate conductor 7 and the The end caps 4 are connected by bolts. The insulating sleeve 6 is connected with the transition flange 8 by bolts. An upper shield 5 is also provided on one side of the intermediate conductor 7, and the upper shield 5 is fixedly connected to the end cover 4 by bolts.

[0028] The end cover 4 and the double shielding ring 1 are connected by bolts, and the terminal 2 is provided on the end cover 4, in order to avoid the high local temperature caused by the poor heat dissipation at the terminal, which will lead to changes in the electric field and cause safety hazards.

[0029] A heat dissipation adjustment mechanism 3 is provided between the end cover and the connectin...

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PUM

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Abstract

An extra high voltage double-shield composite bushing relates to the extra high voltage electric equipment technical field, and comprises an intermediate conductor; the intermediate conductor is sleeved by an insulation sheath on the outer side; the insulation sheath is connected with an end cap through bolts; the intermediate conductor is connected with the end cap via bolts; the insulation sheath is connected with a transition flange via bolts; the end cap is connected with a double-shield loop through bolts, and provided with a terminal; a heat radiation adjusting mechanism is arranged between the end cap and the terminal; a double-shield mechanism is arranged in the insulation sheath. The double-shield loop, a radiator and an internal double-shield mechanism of the composite bushing can be optimized, thus reducing radio interferences, effectively preventing local discharge phenomenon of the terminal, enhancing the local radiation performance, improving the internal electric field distribution non-uniform problem of the bushing, improving the insulation level and the service life of the bushing, and ensuring the safety performance of the GIS equipment operation.

Description

technical field [0001] The invention relates to the technical field of extra-voltage electrical equipment, in particular to an extra-high voltage double-shielding composite bushing for 1100kV gas-insulated metal-enclosed combined electrical appliances (GIS for short). Background technique [0002] With the commercial construction of UHV power grid in my country, the power transmission and transformation technology of power system continues to develop and progress. In order to reduce the power loss in the process of power transmission and transformation, it is imperative to increase the voltage level of power transmission and transformation lines. The requirements are increasing day by day. As an important part of the UHV GIS equipment, the 1100kV composite bushing needs to have good mechanical and electrical properties to ensure the reliability of the equipment during operation. Most of the 1100kV composite bushings successfully developed by domestic GIS manufacturers are mad...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H01R9/00H01R9/22H01B17/58H02B13/035H05K7/20H05K9/00
CPCH01B17/583H01R9/00H01R9/22H02B13/035H05K7/2039H05K9/0009
Inventor 经凯李玉利徐家忠张敬三刘坤亓云国齐印国李君涛李琴逸见礼
Owner CET AE POWER SHANDONG HIGH VOLTAGE SWITCHGEAR
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