Utility BESS integration to High voltage Substation

Utility-scale Battery Energy Storage Systems (BESS) are rapidly reshaping Canada’s electrical grid, enabling greater integration of wind and solar generation while improving reliability, flexibility, and capacity management. As projects scale into the 50 MW to 400+ MW range, engineers are increasingly tasked with designing complex, multi-layered systems that extend far beyond “batteries connected to the grid.”

This webinar provides a structured, engineering-focused introduction to utility-scale BESS integration with high-voltage substations. Participants will explore the full electrical architecture of grid-connected storage systems—from battery enclosures and power conversion systems to 34.5 kV collection networks, protection and control systems, and HV substation interfaces. Through practical design walkthroughs and single-line diagram development, the session demystifies how large-scale storage systems are engineered, interconnected, and optimised for real-world grid applications across Canadian interconnection environments.

Key Topics Discussed:

• Growth of utility-scale BESS in Canadian power systems
• Role of BESS in renewable integration and grid stability
• Overview of system architecture from battery to grid interconnection
• Battery enclosures, PCS (power conversion systems), and MV transformers
• 34.5 kV medium-voltage collector system design principles
• Aggregation of distributed battery units into collection systems
• BESS collection substation design and functionality
• HV/MV substation interface with transmission networks
• System sizing: MW (power) vs MWh (energy) design considerations
• Electrical protection, control, and grid compliance requirements
• Thermal management and fire protection system integration
• Site layout design: spacing, access, and safety constraints
• Single-line diagram development for utility-scale BESS projects
• Variations across standalone, hybrid, and provincial interconnection projects