Utility Field Area Network (FAN)

Case Study

Enabling Next-Generation Wireless Communications  for a Midwest IOU

The Challenge:

As electric utilities modernize their distribution systems, the need for reliable, wide-area communications to support field-based grid devices has become essential. From automated reclosers and capacitor banks to voltage regulators and fault indicators, these intelligent devices form the backbone of distribution automation (DA) strategies.

However, utilities operating across rural, suburban, and mixed terrain often struggle to maintain consistent, low-latency communications. Cellular coverage may be limited or unreliable in remote areas, and unlicensed spectrum can suffer from interference and congestion—jeopardizing real-time control and situational awareness.

Utilities needed a dedicated, interference-protected spectrum solution that could serve as the backhaul layer for Field Area Networks (FANs), ensuring reliable connectivity for grid-edge devices and DA systems.

The Approach:

To address these challenges, multiple electric utilities acquired licensed 220 MHz spectrum from Choctaw as the foundation for their FAN backhaul communications. The 220 MHz band offers superior non-line-of-sight performance, long-range coverage, and robust signal propagation—ideal for wide-area distribution systems with minimal infrastructure.

Utilities are leveraging 220 MHz spectrum to connect pole-mounted controllers, field routers, and automation gateways—providing a secure and low-latency link between substations and downstream devices. In many cases, the 220 MHz layer serves as the communications backbone supporting DA schemes, local decision-making, and telemetry integration with ADMS platforms.

the results:

Reliable Backhaul for DA Devices: Utilities now maintain consistent communications with reclosers, capacitor banks, and voltage regulators, even in hard-to-reach or underserved areas.

Improved System Automation: Real-time control and monitoring of distribution assets enables faster outage response, sectionalizing, and restoration.

Cost-Effective Wide-Area Coverage: The long-range propagation of 220 MHz reduces the number of towers and repeaters needed—lowering total cost of ownership.

Resilient and Independent Network Infrastructure: Licensed spectrum ensures secure, utility-owned operations free from commercial carrier dependencies and public network disruptions.

With 220 MHz spectrum, utilities are building resilient, intelligent field networks that support advanced distribution automation and grid modernization initiatives