Design and Testing PCB Rogowski Coil for Lightning Current Measurement

Telecommunication towers and other high-rise buildings are particularly susceptible to lightning strikes. By installing an appropriate lightning protection system, the effects of lightning strikes on telecommunications towers are reduced. Based on observed local lightning characteristics, especially lightning peak current, the lightning protection system is created. In order to validate and monitor the distribution of lightning current that goes through the legs of the tower and down conductors, a suitable lightning current measurement instrument is required. In this study, a measuring instrument based on Rogowski coil was chosen because it has a wide linearity and frequency range which can measure the nature of surges which have a wide frequency and high current. The performance of the designed measuring instrument is tested and calibrated in the laboratory whether it can measure the signal from the surge properly or not. The Rogowski Coil was designed to measure the lightning current up to 100 kA. The novelty of this study is to design Rogowski coil based on local lightning condition that has a good response in low frequency impulse signal.