Analysis of influential factors in determining Very Fast Transient Overvoltages of GIS substations

Author

Babaei, Mehdi ; Babaei, Mehdi ; Nourirad, Ghasem

Author_Institution

Electr. & Comput. Fac., Semnan Univ., Semnan, Iran

fYear

2014

fDate

24-25 March 2014

Firstpage

79

Lastpage

84

Abstract

High voltage Gas Insulated Substation (GIS) is threatened by Very Fast Transient Overvoltage (VFTO) which is high amplitude and high frequency transient within the range from 100 kHz up to 50 MHz in power systems. Operation of Disconnecting Switch is the main origin of these overvoltage phenomena that is analyzed in this paper. In this study, the effects of several parameters that influence on VFTO amplitude have been discussed. The focus of this paper is on the VFTO study of "Siah-bishe" power plant 400kV GIS substation. The study was carried out by modeling all pieces of equipment in EMTP-RV and careful consideration of different modeling guidelines and instructions described in available standards.

Keywords

overvoltage protection; power plants; power system transients; substations; EMTP-RV; GIS substations; Siah-bishe power plant; VFTO; disconnecting switch; frequency 100 kHz to 50 MHz; high amplitude transient; high frequency transient; high voltage gas insulated substation; influential factors; power systems; very fast transient overvoltages; voltage 400 kV; Capacitance; Gas insulation; Power transformers; Substations; Surges; Transient analysis; Basic Insulation Level (BIL); Disconneting switch operation; EMTP; Gas Insulated Substation (GIS); Very Fast Transient (VFT); Very Fast Transient Current (VFTC); Very Fast Transient Overvoltage (VFTO);

fLanguage

English

Publisher

ieee

Conference_Titel

Power Engineering and Optimization Conference (PEOCO), 2014 IEEE 8th International

Conference_Location

Langkawi

Print_ISBN

978-1-4799-2421-9

Type

conf

DOI

10.1109/PEOCO.2014.6814403

Filename

6814403