Resin impregnated paper capacitance type extra-high-voltage alternating current-direct current wall bushing

Abstract

The invention introduces a resin impregnated paper capacitance type extra-high-voltage alternating current-direct current wall bushing which is provided with a conducting rod (7), wherein the conducting rod (7) is provided with a terminal board (2), a capacitance core (6) in a resin impregnated paper structure is sheathed in a middle section of the conducting rod (7), a sleeve (11) is sheathed on the capacitance core (6), insulating coatings (5), cross sections of which are in multilayer umbrella skirt shapes, are sheathed on both sides of the sleeve (11), and a test tap (9) and an SF6 gas pressure gage (10) are radially connected to the capacitance core (6). The bushing has the advantages that (1) the anti-pollution flashover capability is strong; (2) the civil engineering cost is reduced, and cool leakage of a phytotron is reduced; (3) the influence of heating of a conducting tube of the bushing is favorably reduced; (4) installation and overhaul are convenient; (5) an operating state of the bushing can be monitored in real time; (6) gas leakage is not likely to appear; (7) the grade of design voltage is high, and the application prospect is wide.

Description

technical field [0001] The invention belongs to the technical field of electrical engineering, and relates to a glue-impregnated paper capacitive UHV AC / DC wall-through bushing, which is suitable for being installed in a UHV artificial climate laboratory and used for pressurization tests on tested products. Background technique [0002] In order to study the icing problem of UHV power transmission and transformation equipment, UHV artificial climate laboratory has been built in recent years. The power supply equipment is usually installed outdoors. When the indoor test product is pressurized, a UHV AC / DC wall bushing is needed to connect the test power supply and the test product. However, the known wall-piercing bushings, such as the oil-immersed UHV wall-piercing bushing introduced in the patent document with application number 201020684972.4, have the following defects: 1) It is very difficult to manufacture, which is not conducive to large-scale production and is not con...

AI Technical Summary

Problems solved by technology

However, the known wall-piercing bushings, such as the oil-immersed UHV wall-piercing bushing introduced in the patent document with application number 201020684972.4, have the following defects: 1) It is very difficult to manufacture, which is not conducive to large-scale production and is not conducive to Large-scale promotion and use; 2) The climate indoor design conditions cannot meet the icing test and pollution test, especially in the icing test, the indoor and outdoor temperature difference is too large, often exceeding 30 degrees Celsius, if the oil-immersed wall bushing is used, the oil The flow rate is too fast, and the heat conduction is intense, which often causes the leakage of indoor air-conditioning to be too large, which affects the thermal insulation performance.

In addition, the wall bushing runs in an environment with high and low temperatures, and its sealing ring ages quickly, which often leads to oil leakage

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