Research on Lightning Current Detection System of Fan Blade Lightning Protection Using Electromagnetic Transient Simulation Method

An electromagnetic transient simulation method based on ATP is used to simulate the lightning current at different positions, and its spectrum is analyzed. A set of lightning test equipment is developed. In this study, Rothschild coil and non-inductor are selected as induction components, and the Rothschild winding is located on the shuttle body and the tower barrel respectively. The induction element is arranged in the impeller. The sensor is connected to the lightning test device and the test data is transmitted to the test terminal by optical fiber. The coupling mathematical and physical models of time-varying lightning current in the downlead are constructed to study the current transmission mechanism in the downlead. The time-varying characteristics of wire are studied, and the material availability index of wire is established. The conductivity of the conductor is studied considering the temperature variation characteristics of the conductor. The experimental results show that the designed circuit meets the demand of lightning current signal extraction. The current measurement system of fan lightning discharge process.