Generation of Partial Discharge Current Pulse and its Radiation/Propagation Characteristics of Electromagnetic Wave in GIL

摘要

We observed current pulse waveforms of partial discharge (PD) in 275kV full scale 168m length gas insulated transmission line (GIL). We also investigated voltage phase dependency and frequency characteristics of electromagnetic wave emitted from PD. From these results, we discussed mutual relationship between PD current waveform and emitted electromagnetic wave characteristics. Furthermore, we discussed the propagation characteristics of PD signal in long GIL.