Sault Smart Grid: Canada's First Citywide Smart Grid

PUC Distribution Inc. needed to modernize its aging electricity distribution infrastructure to improve reliability, reduce outages, enable integration of distributed energy resources, and prepare for electrification and clean energy transition. The utility faced the challenge of financing a major grid modernization initiative without raising customer rates while also needing to reduce greenhouse gas emissions and improve service quality for its 35,000 residential and commercial customers across Sault Ste. Marie.

Between 2018 and 2023, PUC implemented a comprehensive smart grid transformation spanning its entire service territory. The solution integrated multiple technologies: an Advanced Distribution Management System (ADMS) from Survalent for real-time grid control; Advanced Metering Infrastructure (AMI) providing granular consumption data; Voltage/VAR Optimization (VVO) and Dynamic Voltage Regulation (DVR) for efficient energy delivery; and Fault Location, Isolation, and Service Restoration (FLISR) for self-healing capabilities. Black & Veatch led design and integration while PUC leveraged $10.6M in federal funding from Natural Resources Canada's Green Infrastructure program. The project was financed through energy savings generated by the VVO system, allowing implementation without increasing customer bills.

Since launching in November 2023, the Sault Smart Grid has delivered measurable operational improvements. The system achieved 2.86% energy savings (approximately 2.7% residential energy reduction valued at $2.3M annually) through voltage optimization. Grid reliability improved significantly with 638,000 fewer customer-minute outages recorded, 6,000 customers saved from experiencing outages, and by 2025 the system prevented outages for more than 10,000 customers while avoiding over 900,000 customer outage minutes. Environmental benefits include an annual reduction of 2,804 tonnes of CO₂ emissions, equivalent to removing 600 passenger cars from the road. The self-healing grid capabilities enable automatic fault detection and power rerouting, reducing both outage frequency and duration.

The Sault Smart Grid demonstrates that comprehensive grid modernization can be financially self-sustaining when energy savings are strategically leveraged to offset capital costs, a critical lesson for utilities concerned about rate impacts. The project's success stems from integrating complementary technologies rather than deploying isolated solutions—VVO savings funded the broader initiative while FLISR and ADMS multiplied reliability benefits. As Canada's first citywide smart grid, this case proves that even mid-sized municipal utilities can achieve transformational results through strategic federal partnerships and disciplined implementation. The model offers a replicable blueprint for utilities transitioning to clean energy while maintaining affordability and reliability.