Extra-high-voltage direct current wall bushing high-voltage test supporting platform and using method

Abstract

The invention discloses an extra-high-voltage direct-current wall bushing high-voltage test supporting platform and a using method and relates to the DC transmission equipment test field. The extra-high-voltage direct-current wall bushing high-voltage test supporting platform comprises a supporting cylinder, a main platform, a sleeve support, a mounting flange, a deflector rod and a power piece; and the main platform is fixedly installed at the upper end of the supporting cylinder. The main platform is provided with a first end face and a second end face in the length direction. The distance from the first end face to a fixed connection point is larger than the distance from the second end face to the fixed connection point, so that the gravity center of the main platform deviates away from the axis of the supporting cylinder. The sleeve support is arranged on the main platform, and the sleeve support is rotationally connected with the mounting flange which is used for fixing a to-be-tested extra-high-voltage direct-current wall bushing. One end of the deflector rod is fixedly connected with the mounting flange, the other end is connected with the output end of the power piece, andthe power piece drives the deflector rod to rotate and incline the extra-high-voltage direct current wall bushing.

Description

technical field [0001] The invention relates to the field of DC transmission equipment testing, in particular to a high-voltage testing support platform for UHV DC wall-piercing bushings and a use method thereof. Background technique [0002] UHV DC wall-piercing bushings need to be hoisted to keep a certain safe distance from the ground when conducting high-voltage tests, and a high-voltage test support platform is required. Conventional support platforms are suitable for high-voltage tests of UHV DC wall-piercing bushings. The applicability is poor. The main manifestations are: [0003] 1) In the mechanics of the wall bushing or the high voltage process, it is often necessary to simulate the test conditions at different angles between the wall bushing and the wall. The conventional support platform device has no angle adjustment function or only a few fixed angle adjustments, which cannot be continuously adjusted. adjustment, and the entire installation process is comple...

AI Technical Summary

Problems solved by technology

[0003] 1) In the mechanics of the wall bushing or the high voltage process, it is often necessary to simulate the test conditions at different angles between the wall bushing and the wall. The conventional support platform device has no angle adjustment function or only a few fixed angle adjustments, which cannot be continuously adjusted. adjustment, and the whole installation process is complicated, low in efficiency and poor in safety

The usual practice of conventional installations is to hoist the bushing horizontally with a crane, and slowly adjust the angle of the bushing to a certain value before installing it on the supporting flange. During the voltage test, the operation during the angle adjustment process is difficult and time-consuming. During the hoisting process, if the operation is not careful, it will bump the bushing body and cause damage to the bushing. Therefore, it takes a lot of time during the installation process. It takes a lot of manpower to protect, and the test efficiency is low

[0004] 2) The test voltage of the UHV DC wall bushing is high, and the conventional support platform has no voltage equalization shielding ring, which is very easy to cause partial discharge and cause the test to fail

The weight of the UHV DC wall bushing is heavy, and the center of gravity is not at the flange. The installation flange of the conventional support platform is at the center of the top of the support platform. After the wall bushing is installed, its center of gravity is not on the platform support column, resulting in There is a greater risk of tipping

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