Dry-type all-insulating tubular bus

A tubular busbar and fully insulated technology, applied in the direction of insulated cables, insulated conductors, conductors, etc., can solve problems such as deformation dislocation, large skin effect, busbar use and life impact, etc., to facilitate large-scale manufacturing and skin effect The effect of low coefficient and uniform electric field distribution

Active Publication Date: 2011-11-09
SHANGHAI CHANLIAN ELECTRIC TECH
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  • Abstract
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  • Claims
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AI Technical Summary

Problems solved by technology

According to statistics, when this kind of insulated busbar has been in operation for about 3 years, the partial discharge can easily exceed the standard, resulting in frequent accidents such as breakdown, which poses a great threat to the safe operation of the power grid.
[0006] PTFE tape and shielding paper have low tensile and bending strength. This kind of wrapped insulating busbar, because each layer can slide independently, in the deformation of the busbar, the insulating material cannot bear the stress, and the stress in each direction is uneven, which will cause Lead to

Method used

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  • Dry-type all-insulating tubular bus
  • Dry-type all-insulating tubular bus

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Embodiment Construction

[0022] Such as figure 1 The dry-type fully insulated tubular busbar shown in the figure sequentially includes a hollow conductive tube 1, a first epoxy resin insulating layer 2, a first shielding layer 3, a second epoxy resin insulating layer 4, and a second shielding layer from the inside to the outside. 5. The third epoxy resin insulating layer 6, the third shielding layer 7, the third shielding layer is connected to the ground zero potential to form a shielding protection layer. The hollow conductive pipe, each epoxy resin insulating layer and shielding layer are coaxial circular pipe bodies.

[0023] The invention adopts a special molding process of epoxy resin, which releases the pressure evenly, balances the stress in all directions, the density of the village is consistent, the magnetic force lines are uniform and symmetrical without deformation, no bubbles, and the partial discharge is almost zero. Due to the excellent insulating properties and curing properties of ep...

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Abstract

The invention discloses a dry-type all-insulating tubular bus and relates to power generation, transmission, transformation and distribution devices of an electric power system. The dry-type all-insulating tubular bus comprises a hollow conducting tube, a first epoxy resin insulating layer and a first shielding layer, wherein the first epoxy resin insulating layer is coated outside the hollow conducting tube; and the first shielding layer is coated outside the first epoxy resin insulating layer. By using a coaxial capacitance principle and an epoxy resin molding technology, the dry-type all-insulating tubular bus has the advantages of high bus capacity, low volume, energy conservation, maintenance-free performance, safe operation and convenience for large-scale manufacturing.

Description

technical field [0001] The invention relates to power generation, transmission, transformation and distribution devices of a power system, in particular to a novel dry fully insulated tubular busbar. Background technique [0002] With the rapid development of my country's economy, the power supply capacity has increased significantly. The rated current of the low-voltage side of the transformer is also increasing. At present, the capacity of a single 110KV and 220KV transformer reaches 120MVA, the low-voltage side voltage is 6.3-13.8KV, and the working current is as high as 5000A-11000A. At the same time, thermal power generation units with a single capacity of 125MW or less in my country are being gradually shut down. 200MW, 300MW and 600MW generating units have become mainstream power generation equipment, their export voltages are 15.75KV, 18KV and 20KV respectively, and their export currents are 8625A, 11320A and 19000A respectively. [0003] Existing busbars include ...

Claims

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Application Information

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IPC IPC(8): H01B9/04H01B7/17H01B7/30H01B7/42
Inventor 曾奕
Owner SHANGHAI CHANLIAN ELECTRIC TECH
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