Abstract
In this paper, we will analyze Partial Discharge (PD) in a typical Gas-insulated substation and the voltage signals are simulated in bus bars and different elements such as transformers in presence of PD and normal state. Then, the corresponding carves compare with together. For this means, we simulate sheikh bahayi substation in Tehran as a 400kv GIS substation in EMTP software. First, very fast transients(VFT) model is used for the GIS substation modeling. Then, voltage signal of different points of GIS substation in presence of PD are measured by use of the PD model in gas insulator and VFT model, until the PD effects on system voltage is determined. Keyword: GIS Substation, Partial Discharge, VFT Method, Digital Simulation.
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