Design of a flexible rogowski coil with active integrator applied in lightning current collection

Rogowski coil has been applied widely in the field of lightning current measurement, because it has good linearity, no saturation phenomenon, as well as the electrical isolation between the primary side and secondary side. This paper mainly introduces three kinds of Rogowski coil applied in lightning current collection, and also analyzes and compares them with experiment. We can select the appropriate coil according to the different occasions, costs and installation form. This paper focuses on the application and design of flexible Rogowski coil with active integrator which is used in lightning current collection. The experimental result indicates that the active integrator has good linearity and waveform restoration, especially better integral effects on the frequencies from hundreds Hz to hundreds kHz.