Ground wire grounding controller

Abstract

The invention discloses a ground wire grounding controller which comprises a grounding knife switch, cables and a ground wire insulator, wherein the grounding knife switch is installed on each tower of a transmission line, one end of a main contact of the grounding knife switch is connected with a ground wire, the other end of the main contact is connected with the tower and is grounded, a closing output node and a tripping output node of the grounding knife switch on a last tower are respectively and sequentially connected with a switching-on input node and a switching-off input node of a grounding knife switch on a next tower through the cables, one end of the ground wire insulator is connected with the ground wire, and the other end of the ground wire insulator is connected with each tower and is grounded. The ground wire grounding controller can control the ground wire to be usually and reliably grounded and detach from the ground in the process of ice melting. The ground wire grounding controller installed on each tower is also automatically switched on and off, therefore, field artificial operation is avoided, and the operation is simple and reliable. The ground wire grounding controllers in a whole line act one by one without the condition that the controllers simultaneously act, thereby efficiently preventing overcurrent of a power cable.

Description

technical field [0001] The invention relates to a grounding controller for a lightning protection line in a transmission line of a power system, which is used for controlling the entire lightning protection line of the transmission line to be grounded or run away from the grounding, and is especially used in the field of safety protection of transmission lines such as melting ice of the lightning protection line. Background technique [0002] Icing of transmission lines will affect the safe operation of the power grid, and in severe cases, it will cause huge damage to the power grid, resulting in large-scale power outages, major economic losses and negative social impacts. For example, the severe ice and snow disaster that occurred in most parts of southern my country around the Spring Festival in 2008 caused serious damage to the power grid, causing serious negative impacts and hundreds of billions of economic losses to the entire country. [0003] Affected by weather and ...

AI Technical Summary

Problems solved by technology

[0004]It is more harmful to the icing of the lightning protection line, because the lightning protection line is erected on the top of the tower, that is, above the transmission line, and its own gravity has a greater moment when it is icing , so it is more likely to cause the tower to fall

Moreover, if the lightning protection line is grounded through the tower, the current cannot be directly connected to melt the ice.

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