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Accurate modelling of very fast transient overvoltages in a 245kV GIS and research on protection measures
2010 Annual Report Conference on Electrical Insulation and Dielectic Phenomena
Year: 2010 | Conference Paper |
Cited by: Papers (1)
Based on 245kV GIS substation, very fast transient over voltages caused by disconnecting switch operation of GIS is simulated and calculated in this paper with B2SPICE program. The different protection measures are compared and analyzed, such as adding ferrite rings, adding opening and closing resistor, metal oxide arrester and R-C absorber. A low voltage experiment was conducted to estimate trans...Show More
Simulation and experimental method for the suppressing of very fast transient over voltages in a 245kv gis using ferrite rings
2010 International Conference on High Voltage Engineering and Application
Year: 2010 | Conference Paper |
Cited by: Papers (5)
Very fast transient over voltages are generated during the switching of disconnectors in gas insulated substation (Gas Insulated Substation). Such over voltages can cause mal functioning of protection circuits and control circuits and also initiates faults and influence on other components such as transformers. The suppression of VFTO (Very fast transient over voltage) is very important in GIS sys...Show More
High frequency magnetic and electric field measurements and simulation of a 245kV GIS
2010 International Conference on High Voltage Engineering and Application
Year: 2010 | Conference Paper |
Cited by: Papers (1)
The transient high frequency electric and magnetic fields are generated in Gas insulated substations(GIS) systems during switching operations by both radiation and conduction mechanisms. In this paper the radiated transient electric and magnetic fields are measured by using high frequency field sensors at important locations in the 245kV GIS were presented. The measurements are carried out at thre...Show More
Time-frequency analysis of very fast transient over voltages for effective shielding of control circuits in a 245kv gas Insulated Substation
2010 International Conference on High Voltage Engineering and Application
Year: 2010 | Conference Paper |
Cited by: Papers (2)
Very fast transient over voltages (VFTO) and very fast transient over currents (VFTC) are generated during switching operation of disconnectors in Gas insulated substation (GIS). In this paper the accurate GIS model has been developed and VFTO'S and VFTC'S were estimated at bushing termination using EMTP program. The wavelet analysis of VFTO and VFTC signals have been carried out and frequency spe...Show More
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