Same-tower four-loop power transmission line configured with differentiation insulators

Abstract

The invention relates to a same-tower four-loop power transmission line configured with differentiation insulators, which belongs to the technical field of lightning protection in a power system power transmission line and comprises a first line, a second line, a third line and a fourth line, a first insulator, a second insulator and a third insulator. The three insulators have different insulation strength. The first insulator is erected on wires on each phase of the first loop to form a weak insulation loop. The second insulator is erected on wires on each phase of the second loop, and the third insulator is erected on wires on each phase of the third loop and the fourth loop to form a strong insulation loop. By means of the differentiation insulation method, simultaneously trip-out rate of double-loop lines and multi-loop lines can be effectively reduced with lower cost, and overall trip-out rate and single-loop trip-out rate of the weak insulation loop cannot be sacrificed.

Description

technical field [0001] The invention relates to a four-circuit power transmission line on the same tower equipped with differentiated insulators, and belongs to the technical field of lightning protection for power system transmission lines. Background technique [0002] Lightning strike is an important cause of tripping of transmission lines. Statistics from CIGRE in 12 countries show that lightning accidents on 275-500kV transmission lines account for 60% of the total accidents. The number of trips caused by lightning strikes in Russian 1150kV transmission lines accounted for 84.2% of the total trips. More than 50% of power system failures in our country are caused by lightning strikes. [0003] With the sustained and rapid economic development, land resources are becoming more and more scarce, and transmission line corridors are becoming increasingly tense. Under this background, multi-circuit lines on the same tower have been used more and more in my country. The use c...

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to propose a four-circuit power transmission line on the same tower equipped with differentiated insulators, which overcomes that the existing differential insulation configuration method will reduce the double-circuit and multi-circuit simultaneous trip rate while reducing the total trip rate and single-circuit trip rate. The problem of rising rates

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