Method and equipment for suppressing non-uniform rain flash by high-voltage wall bushing

Abstract

The invention discloses a method and a corresponding device for preventing non-uniform rain flashes of high-voltage wall-piercing bushings, which can effectively prevent non-uniform rain flashes of high-voltage wall-piercing bushings. The basic principle is to install a rain equalizing device on the top of the casing to prevent uneven wetting of rainwater, so as to ensure uniform wetting of the surface of the casing. When the casing surface is evenly wet, the electric field distribution on the surface is almost the same as when it is completely dry, so it can effectively solve the flashover problem caused by uneven electric field distribution when the casing is not uniformly wet. The device comprises a rain-evening net and a rain-evening net support. The side length of each mesh hole of the rain equalizing net is less than or equal to 30mm, and it is guaranteed that the water droplets on the net surface can fall vertically to the surface of the casing under the light rain state. The material of the net is stainless steel or high-strength insulating material.

Description

technical field [0001] The invention belongs to the field of high-voltage direct current transmission, and relates to a device for preventing non-uniform rain flashing of a high-voltage direct current through wall bushing. Background technique [0002] HVDC wall bushing is one of the most critical equipment in HVDC transmission projects, and it undertakes the function of leading the high-voltage DC in the indoor valve hall or indoor DC field to the outdoors. Therefore, the middle part is fixed on the wall through the grounding flange, grounded together with the wall, and a conductive copper rod or aluminum rod is used to connect the high-voltage lead wire indoors and outdoors in the middle. The detailed structure of the high-voltage wall bushing is attached image 3 , attached Figure 4 , attached Figure 5 As shown, the high-voltage shielding cover of the bushing is located at both ends of the bushing, and the middle part is a grounding flange, which is used to fix the bu...

AI Technical Summary

Problems solved by technology

Although water spraying devices were installed in the early converter stations, as the voltage of the bushings increased, it became more and more difficult to install equipment near it, and the maintenance of the equipment was also very difficult, which also had a greater impact on the water quality of the spraying water. high demands

And the cost is high, when the water pump fails, the safe operation of the bushing in rainy days cannot be guaranteed

Images