This project involved the conversion of an existing 69kV AIS ring bus to a Siemens BAAH indoor GIS configuration within a highly constrained substation footprint. The upgrade enabled increased capacity, improved reliability, and optimized use of limited space.

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Project Scope:

• Conversion of existing 69kV AIS ring bus to 230kV indoor GIS configuration  bus to 230kV indoor GIS configuration

• Installation of two new 230/69kV, 224 MVA power transformers

• Design and integration of associated disconnect switches, instrument transformers, and structural supports 

• Engineering of foundations and oil containment systems 

• Design and construction of a new control house to support modern protection and control systems 

• Development of detailed cutover sequencing and coordination with remote-end upgrades

• Replacement of the existing fire pump house 

• Installation of all required structural systems and foundations 

• Completion of comprehensive electrical studies, including: 

  • Grounding analysis 

  • AC/DC system design 

  • Lightning protection 

  • Cable sizing and routing 
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Key Outcomes:

• Increased Capacity: Enabled integration of higher-voltage infrastructure and additional transformer capacity 

• Optimized Footprint: Successfully delivered a high-density GIS solution within a space-constrained substation 

• Enhanced Reliability: Improved system performance through modernized equipment and protection schemes 

• Seamless Cutover Execution: Minimized operational disruptions through detailed planning and coordination 

• Future-Ready Infrastructure: Established a scalable foundation for future system expansion and upgrades