Powering Up J&K: The New GIS Plan for the 400 kV Siot Substation

The upcoming 400/200 kV Siot substation in Jammu & Kashmir will now be implemented using gas-insulated switchgear (GIS) technology instead of the originally planned air-insulated switchgear (AIS), following approval by the National Committee on Transmission (NCT).

The change was approved in view of significant topographical challenges at the project site, including a nearly 60-metre variation in terrain levels and the presence of a deep valley. These conditions would have resulted in higher construction risks and costs under an AIS configuration. Although GIS technology generally entails higher equipment costs, its reduced civil works requirements and lower site-related risks make it a more cost-effective and practical solution for this project.

The project also предусматри includes a 15-km line-in-line-out (LILO) arrangement of the existing 400 kV Amargarh–Samba transmission line and is aimed at strengthening power transmission capacity in the region. Originally approved in August 2021, the Siot substation project faced delays due to land finalisation issues, with the final site confirmed in January 2023.

News by Rahul Yelligetti.