Calculation and experiment of induced lightning overvoltage on power distribution line

• A calculation method of induced lightning voltage on distribution line is introduced.
• A scaled experiment was carried out to obtain the basic relationship.
• Influence factors on overvoltage were analyzed.
• The calculation results are close to the experimental data.

Induced lightning is the major cause of interruptions in power distribution lines. To reduce lightning accidents and improve the power supply reliability, it is significant to study the characteristics of the induced lightning overvoltage by experiment and calculation. In the paper, a calculation method of lightning induced overvoltage, considering lightning leader progress, non-ideal ground corona effect, field-line coupling, was introduced. The accuracy of the program was verified by comparison between calculated results and the practical experimental results, the calculation results are close to the experimental data. A scaled experiment was carried out to obtain the basic relationship between lightning and overvoltage on distribution lines. Influence factors on overvoltage were analyzed.