Duke Energy Florida Strengthens Grid Resilience with Smart Technologies

As the 2025 Atlantic hurricane season begins, Duke Energy Florida is accelerating its investment in grid resilience and storm preparedness. Through advanced grid-hardening strategies, undergrounding projects, and the deployment of self-healing technology, the utility aims to reduce outages and speed restoration for its more than 2 million customers across the state.

Upgrades to Transmission and Distribution Systems

To withstand increasingly intense storms, Duke Energy Florida has replaced approximately 60% of its wooden transmission poles with more durable concrete and steel structures, with a goal of full replacement by 2028. These upgrades are part of a broader utility hardening plan aimed at reducing storm-related outages.

In addition, the utility has placed about 50% of its distribution system underground, protecting it from wind damage and debris. More undergrounding is underway in outage-prone areas, aligning with Florida's push for resilient electric infrastructure.

Duke has also completed hardening projects at 38 substations, with more than 30 additional sites under development. These substations serve as critical nodes in the grid, and reinforcing them reduces the likelihood of cascading failures during extreme weather events.

Vegetation management continues to play a preventive role. In 2024, Duke Energy Florida completed more than 4,000 miles of vegetation trimming on distribution lines and expects to cover 660 miles of transmission lines in 2025.

How Self-Healing Technology Minimizes Outages

Duke Energy Florida is leveraging self-healing grid technology—automated systems that detect faults and reroute power within seconds, often restoring service in under one minute. As of 2025, more than 75% of customers benefit from this capability.

The impact of self-healing technology was significant during the 2024 hurricane season:

• 3.3 million outage hours avoided during Hurricane Milton
• 1.8 million outage hours avoided during Hurricane Helene
• 208,000 outage hours avoided during Hurricane Debby

This technology mirrors real-time navigation systems by automatically adjusting power flows around problem areas, minimizing disruption and enabling faster recovery.

Restoration Metrics: Faster Recovery After Severe Storms

Thanks to infrastructure investments and smart grid technology, Duke Energy Florida achieved high restoration efficiency in 2024:

• 95% of outages (outside hardest-hit areas) restored within 96 hours of Hurricane Milton
• 95% of outages (for customers with viable connections) restored within 72 hours of Hurricane Helene
• 95% of outages restored within 24 hours of Hurricane Debby

Between 2018 and 2024, the utility has reduced the average customer outage duration by 27%, demonstrating year-over-year improvement in storm response and service reliability.

Addressing Past Criticism Through Technology

Duke Energy has faced past criticism, particularly during Hurricane Irma (2017), for slow restoration and communication gaps. Regulatory and public scrutiny pushed the company to increase transparency, upgrade aging infrastructure, and adopt proactive technologies.

Duke’s current efforts directly address those concerns. Its Storm Protection Plan, approved by Florida regulators, is now yielding measurable resilience outcomes while supporting broader energy transition goals.