High-voltage insulator and a high-voltage electric power line using said insulator

Abstract

The high-voltage insulator for securing a high-voltage wire in an electrical plant or in an electric power line comprises an insulating body, the first end of which is used for mechanically connecting to a high voltage wire and / or to a fixing device, the second end being provided with a metal fixture which is fastened thereto and is used for attaching the insulator to a tower. In order to impart lighting protection properties to the insulator, it is also provided with a multi-electrode system consisting of m electrodes, which are mechanically coupled to the insulation body and are arranged between the ends thereof. The electrodes are disposed in such a way as to form an electric discharge between the adjacent electrodes, between the electrode adjacent to the first end of the insulation body and the high voltage wire or the fixture thereof and between the electrode adjacent to the second end of the insulation body and the metal fixture connected to the tower. The insulator is provided with means for compensating the reduction of the insulator creepage path caused by the multi-electrode system. The electric power line using the insulators of this type do not require lighting dischargers.

Description

technical field

[0001] The invention relates to a high-voltage insulator, which can be used to protect high-voltage conductors in power plants or high-altitude power lines and power networks. The invention also relates to a high voltage power line (HEPL) using such an insulator. Background technique

[0002] Known high voltage support insulators consist of an insulating rib core (notably made of ceramic) with ridges and at its ends metal lugs for securing the insulator to high voltage conductors and support structures. Edge (refer to High voltage techniques. Ed.D.V. Razevig, Moscow, "Energiya" Publishing House, 1976, p.78).

[0003] Disadvantages of prior art insulators include the occurrence of a flashover in the air gap between the metal flanges in the event of a lightning overvoltage, which is then converted to operational under the influence of the operating frequency voltage applied to the high voltage conductor frequency of arcing, which may damage insulators. [00...

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