Lightning is the primary cause for power grid failure. After years of efforts by China’s power grid lightning protection engineers

a relatively mature system of lightning protection is established on the basis of technical route of "finding problem

analyzing problem

solving problem"

which mainly consists of lightning detection

performance assessment

and protection measure

and remarkable effects have been achieved in practical application. Length of 330 kV and above AC and DC transmission lines has increased by more than 30% in recent 5 years

but the lightning trip-out rate（LTOR） is declining overall

LTOR and lightning fault outage rate（LFOR） of China’s power grid both reach the best level all over the world. With the rapid increase of power grid size and reliability requirements

meanwhile combined with lightning protection needs by important transmission channels

DC transmission lines and distribution lines

it is urgent to carry out such works in the following three aspects: 1) as for lightning detection

small and medium-sized high-precision lightning detection is urgent

positioning accuracy and technical economical effect of distributed lightning fault online monitoring system（DLFOMS） need to be further promoted; 2) as for lightning protection performance assessment

it is necessary to study more detailed lightning parameter mining

which focuses on fine lightning parameter and lightning analysis model

assessment method under 3-D terrain condition; 3) as for lightning protection measures

evaluation system for measure effect

structure optimization design of parallel gap

and development of new type lightning arrester need to be carried out.