Single-pole ground loop type direct-current deicing method for overhead ground wire and OPGW (optical fiber composite overhead ground wire)

Abstract

The invention discloses a single-pole ground loop type direct-current deicing method for an overhead ground wire and an OPGW (optical fiber composite overhead ground wire). The overhead ground wire and the OPGW to be deiced are subjected to insulation modification, namely the overhead ground wire and the OPGW are not in direct grounded operation. An anode of a direct-current deicing device is connected to a deicing circuit, and a cathode of the direct-current deicing device is connected to a wire outlet terminal tower of a substation or a grounded mesh of the substation. The direct-current deicing method has the advantages that remote deicing is completed by making full use of capacity of the direct-current deicing device while the overhead ground wire and the OPGW are deiced, and electrified deicing of electric transmission wires is realized.

Description

technical field [0001] The invention relates to a method for direct current melting of overhead ground wires and OPGW optical cables, and is especially suitable for the technical field of melting ice when power transmission wires are electrified and a method for long-distance melting ice. Background technique [0002] When the icing on the overhead ground wire reaches a certain level, it will cause the ground wire to break, the hardware to fall off, the insulator to break, etc., which will directly lead to breakage, collapse or discharge of the line due to insufficient arc sag. Since the current power communication network is combined in the overhead ground wire, if there is no effective means of melting ice, the break of the ground wire will cause the interruption of the power communication channel and endanger the normal operation of the power control system. [0003] At present, certain economic effects have been achieved for DC icing of transmission conductors. DC icing ...

AI Technical Summary

Problems solved by technology

[0004] Introduce the DC deicing technology of transmission conductors into the deicing of overhead ground wires, and solve the problem of overhead ground wires through the "1+1" deicing method of two ground wires or the deicing method of one power transmission conductor connected in series with one overhead ground wire. And OPGW optical cable melting ice, but the "1+1" ice melting method has a large difference in resistance between the overhead ground wire and the OPGW optical cable, the scope of application is greatly reduced, and the resistance of the overhead ground wire is large, the ice melting distance is short and the The capacity of the DC deicing device puts forward higher requirements; although the deicing method of connecting a power transmission conductor in series with an overhead ground wire can effectively solve the problem of long-distance deicing, it requires power failure of the power transmission conductor to melt the deicing

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