Transmission lines without lightning conductors

Abstract

The embodiment of the present invention relates to a transmission line without a lightning protection line. The lightning protection and anti-icing performance of the transmission line is enhanced by canceling the lightning protection line that is easy to be covered with ice and adding a large-capacity lightning protection and anti-icing flash composite insulator. Transmission lines without lightning conductors, including lightning-proof and ice-proof insulators, towers, wires and communication media, among which the current capacity of lightning-proof and ice-proof insulators is higher than that of traditional lightning arresters, which can conduct lightning current to towers while suspending wires; , using the natural grounding method to guide the lightning current into the ground. The non-lightning protection line transmission line solution solves the problem that the traditional line is prone to ice-covered and disconnection of the lightning protection line. While improving the lightning protection and anti-icing performance of the transmission line, it reduces the construction cost of the transmission line and improves the economy and reliability of the transmission line. .

Description

technical field [0001] The invention relates to the field of power transmission, in particular to a power transmission line without lightning protection wires. Background technique [0002] With the rapid development of electric power construction, the area covered by the power grid is getting wider and wider, and transmission lines often need to be erected in some mountainous areas with complex terrain, and these areas often have climate phenomena that are prone to ice in winter and frequent lightning in spring and summer. In the above-mentioned special geographical environment areas, when encountering severe weather, the transmission line is prone to icing flashover or lightning flashover, which will cause tripping and blackout accidents, which seriously threatens the safe and stable operation of the large power grid. [0003] In the transmission line, the lightning protection wire is used to prevent the excessive lightning current from directly hitting the wire, and plays...

AI Technical Summary

Problems solved by technology

After 2008, although no large-scale freezing disasters occurred, accidents of ice-covered and broken lines of lightning protection lines still occurred frequently, which seriously affected the safe operation of the power grid.

However, due to the parallel installation of lightning arresters and insulators, it is necessary to add additional hanging points on the pole tower, the construction volume is large, the economy is poor, and the insulation coordination is complicated. There have been many times in China that the lightning protection flashover method of line lightning arresters has been canceled due to difficulties in installation and transformation. At the same time, the existing surge arresters have insufficient flow capacity and are easily damaged by direct lightning strikes, so they cannot be applied to transmission lines without lightning arresters

Images