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Dry type high-voltage capacitor core and making method thereof

A technology of high-voltage capacitors and capacitor cores, which is applied to the structural parts of electrical equipment, transformers/inductor coils/windings/connections, voltage dividers, etc., and can solve partial discharge and dielectric loss performance exceeding the standard, PTFE friction Problems such as low coefficient, interface air gap and moisture absorption can be achieved to improve the corona inception voltage and sliding voltage, without maintenance and high production efficiency.

Inactive Publication Date: 2003-05-21
NANJING ELECTRIC HIGH VOLTAGE BUSHING
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the very low friction coefficient of PTFE (only 0.15) and the lubricating effect of silicone oil, it is easy to cause insulation slippage during production and transportation; due to the excellent ductility of silicone oil and the effect of thermal expansion and contraction, oil leakage during transportation Situations happen from time to time; because the manufacturing process can easily cause interfacial air gaps and moisture absorption, the partial discharge and dielectric loss performance often exceed the standard

Method used

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  • Dry type high-voltage capacitor core and making method thereof
  • Dry type high-voltage capacitor core and making method thereof
  • Dry type high-voltage capacitor core and making method thereof

Examples

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Embodiment Construction

[0032] figure 1 It is a bushing insulator dry-type high-voltage capacitor core, which includes a current-carrying conductor 1, an insulating layer 2, a capacitive screen 3, a grounding terminal screen 4, a measurement lead-out line 5, and an insulating outer protective layer 6, wherein the inner insulation Layer 2 is made of alkali-free glass fiber roving impregnated with thermosetting epoxy resin curing material (the formula is: bisphenol A epoxy resin (E51), methyl tetrahydrophthalic anhydride (THPA), benzyl dimethylamine (BDMA ) and carboxylated nitrile rubber (CTBN) are evenly mixed into a bonding and curing glue in a ratio of 100:60:1.5:10), and wound in a certain way. The capacitive screen 3 is impregnated and bonded by polyacrylonitrile carbon fiber The above cured material is uniformly wound. In order to ensure the compactness, bending strength and interlayer flatness of the inner insulation, the fiber tows of the insulating layer between the capacitive screens are im...

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Abstract

The present invention relates to a dry high-voltage capacitor core used in the high-voltage electric appliance of electric power system and the method thereof. The capacitor mandrel includes the carrying conductor, the insualting layer, the capacitor shroud, the gronding end shroud, the leading-out wire for measure and the outer insualting layer. Said inner insualting layer is formed by means of winding the insulating tows or band which is impregnated with binding solidified material. Said capacitor shroud is formed by means of uniformly winding the riband or two semiconducting material oral carbon fiber which is impregnated with binding solidified material and said capacitor shroud and said insulating layer are alternately winded together and are solidified into the concentric round in-series capacity voltage-sharing structure of multi-layer pure solid without interface.

Description

technical field [0001] The invention relates to a capacitive main insulation structure used in high-voltage electrical equipment in a power system and a manufacturing method thereof. Specifically, the present invention relates to a capacitive main insulation structure and its production method. Background technique [0002] At present, in high-voltage electrical equipment with capacitive main insulation in power systems, such as bushing insulators, current transformers, capacitive voltage dividers, and cable terminal splice boxes, the commonly used capacitor cores are mainly insulated by insulating paper and transformer oil. This oil-immersed capacitor core is installed in a sealed porcelain sleeve filled with transformer oil, which makes the high-voltage electrical appliance heavy and the porcelain sleeve is easily damaged. It is difficult to transport and install, easy to leak oil, poor in anti-pollution performance, and inconvenient to operate and maintain. [0003] In r...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): G01R15/06H01B17/56H01F27/29H05K7/00
Inventor 孙闻峰
Owner NANJING ELECTRIC HIGH VOLTAGE BUSHING
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