California Gave Scientists $3 Million To Turn A Floating Wind Turbine’s Mooring Line Into A “nervous System” That Can Feel Debris Snagging It And Listen To The Ocean Around It

Floating wind turbines in the Pacific are getting their own “nervous systems” to improve monitoring over the deep ocean.

Offshore clean power generation is rising across coastal regions in the United States.

Due to depth and space limitations nearshore, turbines are increasingly moving miles deeper offshore.

However, the impacts of the harsh deep-sea marine environments on floating infrastructure require constant surveillance.

Will deploying specialized systems help streamline floating turbine deployment and management?

How America’s offshore green capacity is rapidly increasing

The United States’ primary decarbonization goal is to achieve net-zero emissions by 2050.

However, the nation has also set distinct targets for the next decade.

One of these targets includes reaching a 100% carbon-free power sector by 2035.

To achieve these federal climate goals, renewable energy infrastructure must rapidly scale nationwide.

Offshore wind has become fundamental to this strategy.

Traditional onshore installations are increasingly facing challenges regarding limited land space.

As a result, developers have turned to the ocean to overcome rising conflicts and lengthy permit timelines.

Offshore installations have immense potential to produce high-capacity clean electricity for millions of homes and major industries.

Fixed-bottom wind turbines have been leading this growth potential, but are now hitting shallow-water bottlenecks.

The deepest these turbines can be bolted to the seafloor is roughly 200 feet.

Now, prime shallow-water sites are filling up quickly, necessitating a move into deeper waters.

Shifting to floating platforms and the challenges that followed

Floating wind farms are becoming vital along U.S. coasts.

Developers are now targeting the Pacific coast for deployment.

Its deep trenches drop off just miles from shore, making these floating platforms ideally suited.

The region itself features some of the strongest, most consistent winds in the country.

As power demand quickly rises along the coastline, scaling up over the next decade becomes vital.

However, deploying and maintaining these turbines faces severe operational challenges.

The region often experiences dangerous marine hazards such as rip currents, high surf, large swell, and unpredictable large waves.

This increases the frequency of mechanical strain on the towers, mooring lines, and gearboxes.

To prevent catastrophic failures, continuous surveillance is essential.

Furthermore, the potential impact of the turbines on the marine ecosystems must also be tracked.

This manual and remote monitoring is challenging and expensive.

The Lawrence Berkeley National Laboratory researched a new “nervous system” that addresses these complexities.

Creating a “living nervous system” for floating wind turbines

To address the structural issues, distributed fiber-optic sensing technology was added to the floating turbine.

The California Energy Commission funded $3 million for the creation of this innovation.

It functions like a biological nervous system.

Thin, glass-cored fiber-optic cables are threaded throughout the structure.

The technology’s performance under harsh environmental conditions was tested using UC Berkeley’s Pacific Earthquake Engineering Research Center.

Minor stress points and loose bolts were detected early using sensors, which prevents failures before they happen.

The dual-purpose capability of the system

Light pulses through the glass fibers and continuously records reflected behavior in real time.

Physical deformation, minute structural vibrations, and temperature shifts can be tracked across the gearboxes and tower.

The system also uses distributed acoustic sensing to track ambient ocean sounds.

Examples of these sounds include whale vocalizations.

This enables monitoring whale behavior and protection near these floating wind turbines.

Soon after the successful laboratory tests at UC Berkeley, the unique “nervous system” technology moved into the advanced pilot-testing phase.

Commercial field tests are being actively planned. This entails integrating the technology directly with upcoming deep-water Pacific platforms.

Its deployment is scheduled alongside broader state offshore installations over the next decade. Ultimately, this innovative technology will encourage rapid growth of floating wind across the nation.