Lightning protection system

Abstract

The invention belongs to the field of a lightning protection design and provides a lightning protection system. The lightning protection system comprises a surge protection unit, a selector switch unit, a first electromagnetic induction unit and a switching control unit. The lightning protection system is characterized in that a power supplying line of protected loading equipment is provided with the selector switch unit; when the first electromagnetic induction unit detects that lightning stroke current appears on the power supplying line, the movement of the selector switch unit is controlled by the switching control unit to forcibly cut off a power supplying access of the protected loading equipment; after the power supplying access is cut off, the lightning stroke current flows into a grounding grid from the surge protection unit to be further leaked underground. A channel for transmitting the lightning stroke current to the protected loading equipment is completely cut off, so that the probability of striking a protected load by lightning is greatly reduced, and the lightning protection effect is optimized. The lightning stroke current can be distributed without the dependence on a grounding grid resistance value and a characteristic impedance proportion of the protected loading equipment, so that the requirement of the magnitude of the grounding grid resistance value is reduced, and the construction cost and the construction period of the grounding grid are reduced.

Description

technical field [0001] The invention belongs to the field of lightning protection design, in particular to a lightning protection system that can actively cut off the transmission path of lightning strike current. Background technique [0002] Lightning disaster is one of the ten most serious natural disasters announced internationally. Every year, lightning disasters occur frequently and involve a wide range of areas, posing a serious threat to the lives and property of the general public. Especially in today's rapid development of microelectronics technology, lightning discharge not only damages buildings and equipment at the lightning strike point, but also rapidly spreads in all directions in the form of electromagnetic wave radiation and line propagation, which can make many nearby electronic equipment or power transmission Lines are destroyed at the same time, therefore, reducing lightning disasters is the primary goal of modern lightning protection technology. [00...

AI Technical Summary

Problems solved by technology

[0006] The purpose of the embodiment of the present invention is to provide a lightning protection system, aiming at solving the problem that the lightning protection system provided by the prior art can not completely short-circuit the protected load equipment, so that part of the lightning strike current flows through the protected load Equipment, the problem of poor lightning protection effect

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