Accuracy of Lightning Surge Analysis of Tower Surge Response

TL;DRAbstract

This paper presents a comparison between the measured and calculated results of tower surge response for verifying the accuracy of lightning surge analysis. These calculated results are obtained using the Finite Difference Time Domain (FDTD) method and the Electromagnetic Transients Program (EMTP). Injection current waveforms and voltage waveforms across insulator strings of the transmission tower were measured when a rectangular impulse current or a current with the rise time of 1µs were injected into the top of the tower. The measured waveforms of voltage across insulator strings are compared with the calculated voltage waveforms using the FDTD method. The calculated waveforms can reproduce the measured waveforms, and as a result, it is verified that the FDTD method is effective in a lightning surge analysis. The influences of the geometrical arrangement of phase wires, the ground resistivity and the slope of ground on the accuracy of a surge simulation are also investigated using th

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