Method for melting ice and snow of transmission line

Abstract

The invention discloses a method for melting ice and snow of a transmission line. Piezoresistors, a direct current ice and snow melting device and a plurality of short circuit wires are included, the piezoresistors are installed between a ground wire and a tower in a transmission line section that needs ice and snow melting and between the ground wire of the transmission line section that needs ice melting and a ground wire of another section, the short circuit wires are used for connecting the transmission line after a power cut and a ground wire of a line selection section, and two poles of the direct current ice and snow melting device are connected two phases of the transmission line. After ice melting work is completed, semi-insulating transformation facilities do not need to be dismantled, thereby facilitating ice melting operation of the next time, and thus the method for melting ice and snow of the transmission line is extremely low in cost, the workload of ice melting is greatly reduced, and the ice melting efficiency is improved.

Description

technical field [0001] The invention belongs to the technical field of electrical functions, and in particular relates to a method for melting ice and snow of power transmission lines. Background technique [0002] The climate conditions in the area where the transmission line passes are complex, which can easily cause severe icing, which seriously affects the safe and stable operation of the transmission line. At present, the most economical and effective way to reduce the loss of icing on the transmission line is to carry out current icing work on the transmission line; The inductive reactance of the ground wire is large, and DC ice is generally used to melt ice, while the ground wire of UHV transmission lines is generally directly connected to the ground, and the ice melting current cannot be directly applied to the overhead ground wire. In the existing ground wire ice-melting technology, two ground wires are connected in series to melt ice. However, the UHV ground wire i...

AI Technical Summary

Problems solved by technology

[0002] The climate conditions in the area where the transmission line passes are complex, which can easily cause severe icing, which seriously affects the safe and stable operation of the transmission line. At present, the most economical and effective way to reduce the loss of icing on the transmission line is to carry out current icing work on the transmission line; The inductive reactance of the ground wire is large, and DC ice is generally used to melt ice, while the ground wire of UHV transmission lines is generally directly connected to the ground, and the ice melting current cannot be directly applied to the overhead ground wire

In the existing ground wire ice-melting technology, two ground wires are generally connected in series to melt ice, and the UHV ground wire is long and has a large resistance. The general ice-melting device cannot meet the ice-melting capacity requirements

Moreover, in some existing ground wire melting methods, the discharge gap is used to fully insulate the overhead ground wire, but when the ice is seriously covered, the discharge gap may also be bridged due to ice coating, and the overhead ground wire is still grounded, which cannot be implemented. Ice melting; moreover, if the line is completely insulated and transformed, the facilities need to be dismantled after the ice melting is completed, which is time-consuming and laborious; if multiple ice melting is required, the transformation and removal of the line will take a lot of time and work energy