The simulation study on transmittal characteristics of electromagnetic wave in GIS for different excitation input

The ideal Gaussian pulse can be more convenient to simulate the excitation of electromagnetic waves and its propagation characteristics, but the pulse and the actual local discharge current waveform is not exactly the same. At the same time, most of the previous research contents have adopted the simplified GIS simulation model, which does not take into account the influence of the arc of the basin insulator, the three-phase cotube, the shield electrode, the circuit breaker and so on, which may lead to the deviation of the actual electromagnetic wave propagation characteristics. In this paper, the real PD current signal of various insulation defects is used as the excitation source. Considering the actual structure inside the GIS, the propagation characteristics of the electromagnetic wave in the GIS are studied by using the electromagnetic simulation software XFDTD6.3.8.4. and the effects of different structures on the propagation characteristics of electromagnetic waves were studied.