Lightning current measurement by multi-turn differential loop

The measurement of lightning parameters is the basis for lightning protection in gird, for the problem of accurate and safe measurement of lightning current on the transmission lines, proposed a new method of measurement which based on the principle of differential ring can measurement of transmission line lightning current non-contact; introduced the principle of differential ring for measurement lightning current and the design of the sensor. In laboratory by using the impact high current generator to simulate lightning currents, the test results show that: through select appropriate size of differential loop and number of turns, and chouse reasonable shielding ,combined with self-integration, the measurement sensor can reflect the waveform and the amplitude of the currents which produced by the impact high current generator accurately, and has the advantage of strong anti-interference, well linearity and accuracy.