In order to improve the automaticity and efficiency of lightning trip-out fault diagnosis for transmission line

and to minimize the downtime of transmission line caused by lightning failure

a lightning trip-out shielding failure and back striking fault automatic diagnosis system for transmission line is proposed and developed.Comparing lightning current with the shielding failure and back striking lightning-withstand level of line tower based on the tripping information of transmission line and wide-area lightning monitoring data of lightning location system

the lightning failures tower range accurate positioning and lightning trip shielding failure and back striking fault automatic identification is achieved. The system has been applied to southern power grid

updates the long-standing lightning strike fault points by artificial query and lightning accident judgment to realtime automatic diagnosis

and provides effective technical guidance for rapid disposal of lightning failure and differentiated lightning protection evaluation of transmission line

so as to ensure the operation of power grid more security and stability has the vital significance.