DocumentCode
1296809
Title
Importance of Capacitance on Metal Oxide Arrester Block Model for VFTO Applications
Author
Valsalal, P. ; Usa, S. ; Udayakumar, K.
Author_Institution
Dept. of Electr. & Electron. Eng., Anna Univ., Chennai, India
Volume
26
Issue
2
fYear
2011
fDate
4/1/2011 12:00:00 AM
Firstpage
1294
Lastpage
1295
Abstract
Presently, due to several factors, metal-oxide arresters find very limited applications against very-fast transient overvoltages (VFTOs). To enhance the utilization of these arresters and to meet the needs of the dynamic performance of arrester under VFTOs, an improved model for the prorated block is proposed and its performance is analyzed by applying current surges of different front times (5 ns to 8 μ s), tail times, and peak values. There is a time lag between the residual voltage and discharge current due to block capacitance. The delay thus observed in the initial peak of residual voltage is experimentally verified.
Keywords
arresters; discharges (electric); overvoltage protection; VFTO; current surges; discharge current; metal oxide arrester block; prorated block; residual voltage; very-fast transient overvoltages; Arrester block model; block capacitance; front time; residual voltage; transient behavior; very-fast transient overvoltage (VFTO);
fLanguage
English
Journal_Title
Power Delivery, IEEE Transactions on
Publisher
ieee
ISSN
0885-8977
Type
jour
DOI
10.1109/TPWRD.2010.2060093
Filename
5549974
Link To Document