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A 132/33kV substation has been analysed in terms of touch and step potentials at the fence. A review of the relevant standards is conducted. The touch and step potentials at the fence are calculated using a computer model and an alternative fence earth treatment has been proposed. The recommendations given from the analysis conducted can be further explored in terms of practicality and necessity in...
Southern California Edison (SCE) energized the Rancho Vista gas insulated substation (GIS) on May 29, 2009. The substation uses a breaker-and-a-half scheme rated 63 kA at 550 kV and 80 kA at 245kV. The main buses at each voltage are rated 7,500 A continuous. The 500/230 kV substation was built to satisfy rapid load growth and increased reliability requirements for the northeastern Los Angeles Basin.
In a rapidly developing metropolitan city like Mumbai, land is scarce and if available, at very high premium which requires innovative solutions to expand/renovate existing substations to meet the increasing power demand economically with high reliability. This poses various challenges for the utility in terms of improving reliability and availability of the network, reducing life-cycle costs, reducing...
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