Lightning Protection Design for 10kV Composite Distribution Tower

Abstract

Lightning protection design for 10kV composite distribution tower differs from transmission towers and the traditional iron tower due to the insulation of composite material and complexity of lightning protection design for 10kV distribution lines. Related research is still in blank. Key points of lightning protection design are discussed based on the simulation study on the overvoltage characteristic of direct lightning and induction lightning of 10kV composite distribution tower with or without the grounding wire. The result shows that composite tower without grounding wire is suitable for regions where induction lightning is the main risk and the key point is to transfer the flashover path in order to avoid the arc burning the composite tower; Composite tower with grounding wire is suitable for regions where direct lightning is the main risk and the key points are to improve the insulation strength between phase and the ground in order to enhance the induction lightning withstanding level and to improve the insulation strength between phases to avoid double phase flashover before the release of the lightning current. According to the key points, structural parameter optimization is carried out.