A Coordinated Electric System Interconnection Review—the utility’s deep-dive on technical and cost impacts of your project.

Below are four flagship projects showcasing greenfield substation design and advanced power system studies delivered by Keentel Engineering.

where Keentel Engineering delivered end-to-end substation design (primary, secondary) and comprehensive power system studies to ensure safe, reliable, and standards-compliant installations.

These projects reflect Keentel Engineering’s portfolio of utility scale substation design work, spanning EHV transmission, collector substations, and bulk power facilities. Each case demonstrates how substation engineering and power system studies for substations are applied together to support greenfield development, system expansion, and long-term grid reliability.

Design and build of a new 345 kV / 138 kV transmission substation to integrate 400 MW of wind generation into the regional grid.

This 345 kV project represents a full greenfield substation design, addressing site layout, equipment clearances, grounding, and protection from first principles. Substation design for greenfield projects at this voltage level requires coordinated EHV power system studies to validate short-circuit duty, reactive power performance, and system stability prior to energization.

The 345 kV greenfield substation design highlights best practices in transmission integration, grounding, and protection engineering.

EPC-level design for a 100 MW / 400 MWh battery energy storage collector substation tying into a 115 kV network.

As a utility-interconnected collector substation design, this project illustrates how medium-voltage collection systems and high-voltage interfaces are engineered together. Collector substations supporting BESS projects must balance protection sensitivity, control integration, and future expandability.

The 115 kV BESS collector substation demonstrates how collector substation design supports renewable integration and grid stability.

This 500 kV bulk power substation design enhances transmission capacity and ensures reliable interregional power transfer.

on a major interregional corridor, enhancing transfer capability by 1 200 MW.

Bulk power substations at the 500 kV level play a critical role in regional transfer capability and contingency performance. Utility substation designat this scale demands rigorous coordination between physical design, protection schemes, and interconnection studies to meet NERC reliability criteria.

In 1995, Sandip (Sonny) R. Patel earned his Electrical Engineering degree from the University of Illinois, specializing in Electrical Engineering . But degrees don’t build legacies—action does. For three decades, he’s been shaping the future of engineering, not just as a licensed Professional Engineer across multiple states (Florida, California, New York, West Virginia, and Minnesota), but as a doer. A builder. A leader. Not just an engineer. A Licensed Electrical Contractor in Florida with an Unlimited EC license. Not just an executive. The founder and CEO of KEENTEL LLC—where expertise meets execution. Three decades. Multiple states. Endless impact.