Abstract
The lightning-induced voltage on power distribution line having a branch is studied based on numerical calculations. The induced voltage is calculated by the method where the tangential component of the electric field to the line is looked upon as inducing sources, and the electric field is calculated by decomposing the lightning channel into numerous dipoles. Accuracy of the calculated result is ensured with experimental result obtained by using a reduced-scale model. The induced voltage on the distribution line turns out to be influenced by its branch, and is found to be dependent not only on the configuration of a branch line but also on the location of the lightning striking point. In most of the cases, the induced voltage increases when a branch is connected to the distribution line.
