Application of IEC-based Lightning Protection Angle Method in Rooftop PV System
As one of three major methods for the positioning of air-termination system recognized by IEC standards,lightning protection angle method is widely used in various lightning protection facilities in the world.The protection method and reach of protection of the angle method are analyzed,the angle of shade of common single air-termination system with a height of no more than 2 m is given for use in engineering.It points out that the frame of rooftop solar photovoltaic panel on buildings is not suitable for the air-termination system that is used to prevent direct lightning strike,and two specific measures for using the protection angle method to protect rooftop PV panel are given according to the distance between metal or electrical installation and lightning protection system,i.e.lightning protection interval and lightning protection equipotential bonding.Considering that the protection angle method is not adopted in domestic lightning protection specifications,it is recommended that attention shall be paid to the protection angle method and an in-depth study shall be conducted.
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