DocumentCode
3527276
Title
VFTO computation in 420 kV GIS
Author
Kumar, V. Vinod ; M, Joy Thomas ; Naidu, M.S.
Author_Institution
Dept. of High Voltage Eng., Indian Inst. of Sci., Bangalore, India
Volume
1
fYear
1999
fDate
1999
Firstpage
319
Abstract
This paper presents the results of very fast transient overvoltage (VFTO) computations that have been carried out using EMTP for various switching conditions in a 420 kV gas insulated substation (GIS). The variation of VFTO peak along the nodes for disconnector and circuit breaker operations as well as the variation of VFTO with different trapped charges have been studied. The results indicate a distinct pattern of variation of VFTO peak along the nodes of the GIS in the case of disconnector switch operation as compared to that of circuit breaker operation. It has also been noticed that the variation of VFTO peak levels are not proportional to the increase in the trapped charge
Keywords
gas insulated substations; 420 kV; EMTP; GIS; VFTO computation; circuit breaker operation; disconnector operation; gas insulated substation; switching conditions; trapped charges; very fast transient overvoltage;
fLanguage
English
Publisher
iet
Conference_Titel
High Voltage Engineering, 1999. Eleventh International Symposium on (Conf. Publ. No. 467)
Conference_Location
London
ISSN
0537-9989
Print_ISBN
0-85296-719-5
Type
conf
DOI
10.1049/cp:19990571
Filename
820651
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