Induced lightning overvoltage is the main reason for the tripping and shutdownn of 10 k V distribution network. Inorder to assess the risk

the electromagnetic transient simulation model of induced lightning overvoltage is established firstly. The influences of lightning distance

lightning current amplitude and soil resistivity on the overvoltage amplitude are analyzed

and a simplified calculation method for induced lightning overvoltage amplitude is proposed. And then

according to the tower coordinates

soil resistivity and probability density of lightning current amplitude of transmission and distribution lines

the calculation model for lightning flashover probability of distribution network tower is established. Finally

the risk assessment model of induced lightning flashover is constructed combined with the lightning density.