How IEA Powered a Major Substation Upgrade Without Interrupting Production
Summary
When one of IEA Power’s largest manufacturing customers needed to replace its aging substations and upgrade to a higher-voltage utility system, the challenge was clear—complete the transition without disrupting plant operations. Through strategic planning and expert execution, IEA coordinated a complex cutover process that maintained full power reliability throughout construction.The Challenge
The customer’s existing 1960s-era substations were reaching the end of their service life, presenting both reliability and capacity issues, particularly during high-demand summer months. The utility supplier also planned to upgrade its distribution network from 34.5 kV to 69 kV, requiring a coordinated interconnection strategy.
Key challenges included:
- Two new substations needed to be constructed adjacent to the existing ones, requiring careful sequencing.
- The cutover process demanded disconnecting old power connections and energizing new substations—without interrupting power to the manufacturing facility.
- Phase differences between the utility’s substations made direct transfers complex and risky.
The Solution
IEA Power leveraged its deep understanding of the site’s electrical infrastructure and existing on-site generation assets to engineer a zero-outage plan.Key elements of IEA’s solution included:
- Utilizing IEA’s standby generation facility—ten 1,600 kW generators—to carry plant load from a single utility feed during the transition.
- Operating the generation plant to accept load and facilitate manual load transfers between substations, compensating for phase shifts between utility sources.
- Developing a comprehensive manual transfer plan, complete with detailed checklists for operators:
- Manually start and synchronize all engines
- Manually operate breakers for load transfer
- Follow step-by-step procedures for each cutover phase
- Creating multiple transfer sequences to match the staged construction and commissioning schedule for the new substations.
- Coordinating real-time operations between the customer, utility provider, and IEA engineering team to ensure safety and continuity throughout each phase.
This approach represented a first-of-its-kind manual load transfer—meticulously planned and executed with precision.
Result & Impact
- Zero power interruptions during all cutover phases.
- Successful replacement of three legacy substations and connection to new 69 kV utility feeds.
- Enhanced system reliability and power quality for the manufacturing facility.
- Seamless coordination among IEA, the customer, and utility crews throughout construction.
