Study on unbalanced measurement technology of lighting dispersed current in the peripheral area of transmission line

Lightning is an important factor in the biosafety of the surrounding area of the tower, and its core lies in the dispersed current damage. Lightning current flows into the earth, resulting in the imbalance of current, the unbalance of current leads to the unbalance of the voltage around the tower. Aiming at the problem of lack of soil dispersed current test and safety assessment, the experiment of the unbalance of lightning dispersed current is designed, the dispersed current unbalance under the standard lightning impulse is determined. On this basis, the soil dispersed current measurement and evaluation device of lightning tower was developed. The software of the host computer was written by LabVIEW and applied to the test of soil dispersed current. Finally, the practicability of the measurement and evaluation device was verified by experiments.