This project involves development of a 400/132 kV gas insulated substation intended to evacuate 1,000 MW of power in a region characterised by highly uneven mountainous terrain. The substation site includes level differences ranging from 20 metres to 50 metres within the premises, presenting significant challenges for layout planning and construction.

To address these constraints, the substation was engineered with equipment installed across multiple levels, optimising available space and reducing excavation quantities. Several layout adaptations were incorporated to improve space utilisation, including use of GIS building steel columns as stringing points and accommodation of multiple circuits within constrained gantry spans.

The design approach focused on minimising structural quantities while maintaining safety, operability and long term reliability of the substation under difficult terrain conditions.

TCE's Scope