In November of 2009, the IEC Arrester Committee (IEC-TC37-MT4) and the Cigre Arrester Working Group A3.25 met in Kawasaki Japan to discuss several arrester standards and arresters issues. The Japanese IEC National Committee was an incredible host for the meetings. A very interesting highlight of the meeting arranged by our host was a visit to Tokyo Electric’s (TEPCO) 1100kV GIS test substation and UHV transmission line. The sheer size of both of these structures is a bit intimidating. When considering lightning and switching mitigation we certainly will need to do some things we have never done before to meet the requirements. Arrester energy dissipation, switching surge level, corona control, new concept grading rings and more will all have to be better evaluated.
In the GIS substation, Toshiba, Mitsubishi, and NGK all have 1100kV GIS arresters.
TEPCO 1100kV GIS Substation
A 1100kV GIS arrester
The behamouth 1100kV transmission line and tower
Base of the 1100kV transmisison line
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