Bidirectional lightning-proof wire breakage protection method and device for insulated wire

Abstract

The invention discloses a bidirectional lightning-proof wire breakage protection method and device for an insulated wire. A grounding electrode is arranged at the low-voltage end of an insulator; an insulated wire and a current guide line are arranged at the high-voltage end of the insulator; the current guide line is connected with the insulated wire in parallel through puncture wire clamps; arcstriking electrodes are arranged on the two sides of the current guide line; protection gaps are formed between the arc striking electrodes and the grounding electrode. According to the bidirectionallightning-proof wire breakage protection method and device for the insulated wire of the invention, two sides of the insulator are each provided with one discharge protection gap; when any side is subjected to lightning overvoltage, both of the discharge protection gaps act and discharge; during discharging, the two wire clamps jointly provide fault current; the insulated wire, the current guide line and the arc striking electrodes are integrated; the structures of the protection gaps are stable; and therefore, the device of the invention has the advantages of stable performance, reliable action, strong through-current capability and the like, can effectively prevent the occurrence of lightning stroke disconnection faults of the insulated wire, ensures the safety of the insulated wire, andsolves the technical problems of poor power frequency follow current capability, unstable gap distances and low reliability of a single discharge protection gap.

Description

technical field [0001] The invention relates to the technical field of lightning protection protection for power distribution networks, in particular to a method and device for protecting insulated wires against two-way lightning strike and disconnection. Background technique [0002] With the extensive use of 10kV overhead insulated conductors in urban and rural distribution networks, lightning strike accidents often occur on 10kV overhead insulated conductors, mainly because 10kV overhead insulated conductors are struck by lightning and the insulated conductors will be disconnected. Long-term power outages often lead to greater social impact, and at the same time bring a huge workload to line repairs, resulting in indirect economic losses that cannot be estimated. Therefore, lightning breakage has become a difficult problem for the safe and stable operation of overhead insulated conductors. [0003] At present, measures to prevent 10kV insulated conductors from being disc...

AI Technical Summary

Problems solved by technology

[0005] The present invention aims to solve the technical problems of only a single discharge protection gap in the existing lightning protection device and provide a two-way lightning protection for insulated wires The method and device for protection against broken wires. On the insulated wires, two puncture wire clamps are used to parallelly connect a section of drain wires. Both ends of the drain wires are provided with an arc-starting electrode, and a grounding electrode is provided at the low-voltage end of the insulator supporting the insulated wires. A discharge protection gap is formed between the arc electrode and the ground electrode, so that there are two connected piercing wire clips and two discharge protection gaps in the whole device, which significantly improves the flow capacity of the fault current and improves the reliability of the protection device

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