Selection method for lightning protection device of pole tower of power distribution line

Abstract

The invention provides a selection method for a lightning protection device of a pole tower of a power distribution line, and belongs to the technical field of lighting protection. The selection method comprises the steps of determining a target circuit class and a safety request value I at a target circuit region; performing lightning stroke risk estimation on the pole tower to obtain a lightningstroke risk class and a lightning stroke weighted value m of the pole tower; performing quantitative evaluation on performance a lightning protection device; determining a lightning protection weighted value n of the lightning protection device; and determining a reference value g of the pole tower, performing technological economic evaluation on the lightning protection device according to the reference value g, the lightning stroke weighted value m, the lightning protection weighted value n and the safety request value I, and determining optimal lightning protection device. By the steps, the determined lightning protection device with low cost and good lightning protection performance is arranged on the pole tower connected with the power distribution line, so that the lightning protection performance of the power distribution line is accurately corresponding to local lightning protection demand, a power supply circuit is difficult to generate power failure even when lightning strikes weather, and daily and normal running of industrial production are not further affected.

Description

technical field [0001] The invention belongs to the technical field of lightning protection, in particular to a selection method for a lightning protection device for a power distribution line tower. Background technique [0002] At present, in terms of distribution lines, there are problems such as low line voltage level, long total line length, and complex line topology. Based on the above-mentioned many problems, many difficulties will be encountered when selecting a suitable lightning protection device. [0003] The current mainstream selection method is that the staff select a large number of single-type lightning protection devices for configuration based on engineering experience, for example, install one of the devices such as lightning arresters, lightning protection insulators, and parallel gaps along the line. What’s more, Considering the cost of line investment, the installation of lightning protection devices is directly abandoned. [0004] The above two option...

AI Technical Summary

Problems solved by technology

[0004] The above two selection methods make the lightning protection performance of the distribution line unable to accurately correspond to the local lightning protection demand. In the event of lightning strikes, the power supply line is prone to power outages, which affects the normal life and industrial production.

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