IEEJ Transactions on Power and Energy
Online ISSN : 1348-8147
Print ISSN : 0385-4213
ISSN-L : 0385-4213
Special Issue Paper
Inspection of the Switching Surge for the Digital-Control-Panel Adjacent to 500kV GIS
Tadashi SatoYoshinao MatsushitaYoriko ShinkiTsutomu YamajiAkihiro HamanoYasuhiro Shiraki
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2010 Volume 130 Issue 1 Pages 84-90

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Abstract
Recently digital control panels have been installed for various controls adjacent to GIS. As the distance between the digital control panels and GIS is short, switching surge is transmitted without attenuation. Therefore we developed the digital control panel that implemented surge countermeasure. We verified that the digital control panel adjacent to 500kV GIS did not malfunction for switching surge. Moreover we measured the switching surge at the digital control panel and analyzed the intrusion route of switching surge by EMTP. As a result, we observed that the maximum voltages at a secondary circuit of CT and the maximum voltages at a secondary circuit of VT were 2.4kVp-p and 2.8kVp-p, respectively. The major frequencies of those voltage waveform were distributed almost more than 10MHz. In the EMTP, the intrusion route from the GIS to the secondary circuit of VT was calculated. The voltage waveforms at VT terminal calculated by EMTP agree with measured results in the view point of amplitude, frequency and damping time.
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© 2010 by the Institute of Electrical Engineers of Japan
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