Title :
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
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);
Conference_Titel :
Power Engineering and Optimization Conference (PEOCO), 2014 IEEE 8th International
Conference_Location :
Langkawi
Print_ISBN :
978-1-4799-2421-9
DOI :
10.1109/PEOCO.2014.6814403
