Dry type high-voltage capacitor core and manufacture method thereof

Abstract

The invention relates to a capacitance type major insulation structure used in a power system high-voltage electrical apparatus device and a manufacture method thereof. A dry type high-voltage capacitor core comprises a zero screen, an insulation layer, a capacitor screen, a grounding end screen, a measuring leading-out wire and an insulation outer protecting layer, wherein the inner insulation layer is wound to the required size by using glass fiber roving in a certain manner; the capacitor screen is uniformly wound into the required size by using an aluminum foil or metal wire net or semiconductor material or carbon fiber; and the capacitor screen and the insulation layer are alternatively wound to the required sizes, and then an epoxy resin curing system is poured under the vacuum state, and subjected to temperature rise and cured into a multi-layer pure solid and interface-free concentric round serial capacitor voltage-sharing structure. The capacitor core made by using the method has the advantages of high mechanical strength, good heat radiation, low local discharge capacity, high product qualified rate, low manufacture cost, short manufacture period and the like.

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, in particular to a capacitive main insulating structure for improving field strength along a surface and having an insulating effect on ground and a production method thereof. Background technique [0002] At present, there is a manufacturing technology of impregnating insulating paper with epoxy resin under vacuum conditions. The capacitor core manufactured by this technology is not easy to soak through the insulating paper, the air gap is difficult to eliminate, and partial discharge is easy to occur, so the qualified rate of the product is low, especially in the more advanced High-voltage products cannot meet the requirements due to their large size; the capacitor core manufactured by this technology has poor heat dissipation, and when the current-carrying requirements are large, it is necessa...

AI Technical Summary

Problems solved by technology

The capacitor core made by this method has the advantages of short production cycle, low manufacturing cost, good heat dissipation performance, and high mechanical strength; but because the air-impregnated insulating material used in this process has not been vacuum-treated, the capacitor core produced There will be air bubbles in the submersible that are not easy to discharge, and partial discharge will occur at higher voltages, which cannot meet the requirements of high-voltage products.

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