Study of very fast transient overvoltages and mitigation techniques of a gas insulated substation

Author

Pathak, Nikhil ; Bhatti, T.S. ; Ibraheem

Author_Institution

Jamia Millia Islamia Univ., New Delhi, India

fYear

2015

fDate

19-20 March 2015

Firstpage

1

Lastpage

6

Abstract

The very fast transient overvoltages (VFTOs) generated due to switching operations of gas insulated substations (GIS) are dangerous to the equipments connected to the substations. In special cases these transients may cross the Basic Insulation Level (BIL) of the GIS. In this paper, these transient voltages are investigated at the different sensitive locations of a 400 KV GIS. VFTOs of the GIS are calculated using EMTDC/PSCAD software. Hence, the suppression of the VFTOs is also an important field of interest. The suppression techniques to reduce the VFTOs are also discussed in this paper.

Keywords

EMTP; gas insulated substations; overvoltage protection; power system transients; BIL; EMTDC; GIS; PSCAD software; VFTO suppression; basic insulation level; gas insulated substations; mitigation technique; switching operation; very fast transient overvoltage; Gas insulation; Power transformers; Substations; Surges; Switches; Transient analysis; Air insulated substations (AIS); Basic insulation level (BIL); Gas insulated substation (GIS); Very fast transient overvoltages (VFTOs);

fLanguage

English

Publisher

ieee

Conference_Titel

Circuit, Power and Computing Technologies (ICCPCT), 2015 International Conference on

Conference_Location

Nagercoil

Type

conf

DOI

10.1109/ICCPCT.2015.7159278

Filename

7159278