LIGHTNING-INDUCED VOLTAGE ON AN OVERHEAD WIRE INFLUENCED BY A BRANCH LINE

The lightning-induced voltage waveform on an overhead wire having a br anch is studied based on numerical calculations. The induced voltage i s calculated by the method where the tangential component of the elect ric field to the overhead wire is looked upon as inducing sources. Acc uracy of the calculated result is ensured with experimental results ob tained by using a reduced-scale model. The induced voltage on an overh ead wire 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 t he location of the lightning striking point. In most of the cases, the induced voltage increases when a branch is connected to an overhead w ire.