Bell jar type damper used in high altitude areas

Abstract

The invention provides a bell jar type damper used in high altitude areas. By applying the bell jar type damper, the corona audible noise and the corona loss of a 330kV high altitude area electric transmission line can be effectively reduced, and the damper has the advantage of good damping performance. The damper comprises a damper head, a steel strand and a wire clamp. The damper head has a cylinder structure, one end of the damper head is provided with a lightening hole having a diameter of phi 3 in the inside, the other end of the damper head is provided with an installation having a length of L2 in the inside, and the damper head is provided with a drain hole having a outer diameter of phi 4 at the circular ring of the outer side of the lightening hole, wherein the drain hole runs through the circular ring in the axial direction. According to the bell jar type damper of the invention, through simulating calculation, the surface maximum field strength is reduced to 22kV / cm which is reduced by 19% compared with the surface maximum field strength of a conventional bell jar type damper; the corona onset voltage of the damper is 390kV in the 4000 meter altitude height simulation condition which is much higher than the 330kV rated operating voltage, so the occurrence of corona can be effectively restrained, and the damper has the advantage of good damping performance.

Description

technical field [0001] The invention belongs to the field of power transmission line fittings, in particular to a bell type anti-vibration hammer used in high altitude areas. Background technique [0002] The western region of my country is located on a plateau. According to the geographical characteristics of the western region and its energy development planning, the demand for electricity is increasing day by day. However, with the increase of altitude, the problem of high-altitude corona is very prominent, and corona effects such as corona loss caused by corona discharge will affect the safe and economical operation of transmission lines. Therefore, it is very necessary to prevent corona discharge and corona noise of transmission lines in high altitude areas. [0003] Corona is caused by the non-uniform electric field generated by the uneven conductor. When the voltage rises to a certain value, in the part with a small curvature radius in the uneven electric field, the ...

AI Technical Summary

Problems solved by technology

According to the on-site measurement of the electromagnetic environment of a large number of 330kV transmission lines, it is found that the corona discharge phenomenon of the conventional anti-vibration hammer is more prominent in the range of 1000-4000m above sea level, and the corona initiation parts of the anti-vibration hammer are mainly concentrated at both ends of the hammer head, and As the altitude increases, its discharge intensity and corona noise increase

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