Discussion on the Lightning Protection Design for the Secondary System of Control Building in the Power Plant
Chen Chuang-ting · Insulators and Surge Arresters · 2006
According to the national standard and the experience of lightning protection,aim at the source of lightning,a synthetical lightning protection method for control building secondary system in the Shenzhen Guangqian electric power Co.Ltd.is proposed.In this paper,to prevent the lightning strike to the control building,firstly,an annular equipotential earthing network should be designed according to the structure of building.The external lightning protection system must include a lighting receiver,a down leading wire and an earthing device,and the surge protective device(SPD) should be installed with the electronic equipments to decrease the over-voltage and over-current at the original terminal in the Internal lightning protection system.The SPDs must be installed on the power supply system and signal system at one time in the distribution network,and all equipments must be earthed reliably.The metal shielding grid for avoiding the electromagnetic interference is designed.The actual results show that above measures can insure the secondary system equipments in control building running reliably and safety.