뇌격전류 측정의 정확도에 영향을 미치는 요인

초록

The factors affecting the accuracy of lightning current measuring system are figured out the materials and length of down- conductor, and impedance matching between grounding resistance and characteristic impedance of cable. The cable with the low characteristic impedance used to transfer the lightning current from the top of the tower is too long to measure the waveform of lightning current, exactly. Especially, the height of the tower can cause the change of front time and magnitude of lightning stroke current. Basically, in this experiment, it was found that the magnitude and rise time of the lightning current are extremely dependant in the length of down-conductor in lightning current measuring system.