Offshore Substations in the North Sea

Working offshore often means spending long stretches of time alongside these vast yellow structures – offshore substations. They form the backbone of a wind farm, collecting and exporting the power generated by turbines scattered across the sea.

The scale is difficult to appreciate until you’re up close. From the deck of a vessel, the platforms rise high above the water, a complex of steel, stairs, and cables, lit up against the horizon. Depending on the weather, they can look strikingly different – golden in calm sunsets, isolated and moody under stormy skies, or glowing at night when lit against the dark.

For those who work out here, these structures are both workplace and landmark. For those onshore, they remain largely unseen, but they’re critical to delivering renewable energy back to the grid.

The offshore wind industry is a world of steel, sea, and constant change – both technical and natural. Capturing it in black and white strips everything back to structure and contrast, highlighting the balance between industry and environment. For more of my industrial and wind industry work, visit my Wind Industry portfolio.

Norwind Storm at Work

Out in the North Sea, the Norwind Storm is a familiar sight—steady, purposeful, and always where the work is. These iPhone images capture the vessel alongside the offshore substation, with the wind turbines fading into the haze and the low sun throwing golden light across the water.

From the deck or framed against the open horizon, the Storm stands as a reminder of the constant effort behind the offshore wind industry. The scale of the operation is immense, yet moments like these bring out its quiet beauty.

See more of my work in the Wind Industry portfolio.

Crew Transfer Vessels in Offshore Wind: Farra Grainne at Work

These images focus on the Farra Grainne, a crew transfer vessel working offshore within a wind farm environment. Taken in calm conditions and clear light, they show the vessel in a few different contexts: close alongside, moving away through the field, and positioned next to the structure during transfer operations.

In offshore wind, crew transfer vessels, usually shortened to CTVs, are a core part of daily operations. Their job is to move technicians and small teams between shore or a mothership base and offshore assets such as turbines and substations. They are specifically designed for that role, and in many projects they remain the preferred transfer solution for sites closer to shore. 

The transfer itself is one of the most important parts of the process. Industry guidance from G+ and the Energy Institute is built around the principle that people should not fall into the sea or become trapped between the vessel and the offshore structure during transfer. That is why vessel design, operating procedures, competence and transfer arrangements matter so much. 

It is easy to look at a wind farm and focus only on the turbines, but the day-to-day operation relies on far more than that. CTVs are one of the clearest examples. They are there to move people, equipment and capability around the site, and without them a lot of offshore maintenance simply would not happen in the same way. General guidance on offshore wind service vessels also notes that CTVs are designed specifically to transport service teams and are commonly fitted for transfer work against offshore structures. 

Offshore Substation – The Beating Heart of a Wind Farm

An offshore substation (OSS) is the critical hub of a wind farm, where the power generated offshore is collected and transmitted back to shore. Sitting high above the waves, it is one of the most striking structures in the renewables industry.

From the vessel bridge, the platform is an impressive sight in the distance, glowing gold against the sea at night. These substations not only represent engineering excellence but also play a vital role in the delivery of clean energy across the UK and beyond.

Exploring and photographing offshore substations is always a privilege—capturing them from both the technical working perspective and as powerful silhouettes on the horizon.

The offshore industry is full of dramatic structures and scenes, from turbines to substations. You can explore more of my work in the Wind Industry portfolio, as well as my wider Industrial and Places collections.

Vessel Operations Offshore

Out in the North Sea, the Norwind Storm support vessel takes up position beneath the setting sun — a steady presence against the rolling water and the turbine structures beyond.

These images show the vessel in its working context, sitting alongside the wind farm and substation, with the horizon fading into haze. The black and white treatment suits the industrial scale of the scene, stripping away colour to leave structure, light and movement.

Service operations vessels are a core part of offshore wind O&M. They provide accommodation and logistical support for technicians working on turbines and substations, often remaining on site for extended periods during maintenance campaigns.

This series adds to my Wind Industry collection, alongside wider work across Industrial and Places photography.

Offshore workers.

On an offshore wind farm substation, the real story is the people who keep the asset running. This set focuses on routine tasks, safe systems of work, and the teamwork that holds everything together. The aim is simple: clear, direct portraits of workers on the job—no fuss, just the work and the environment.

Part of my ongoing industrial and renewables series. For more, see the renewables and industrial sections of my portfolio.

Offshore Substation

The Hollandse Kust Zuid (HKZ) offshore substation sits in the southern part of the Dutch North Sea — one of the largest offshore wind projects in the Netherlands, operated by Vattenfall and connected to the Dutch grid via TenneT. The substation is the electrical hub of the wind farm, collecting power from the surrounding turbines and transmitting it back to shore via high-voltage cable.

These images show the structure's deck, steel beams, walkways and cable trays framed against open sky and the changing light of an offshore day. There is contrast in the work-worn surfaces, in the reflections where light catches metal, and in the sense of human scale where fittings and handrails appear alongside the larger structural elements.

Also visible in this set are wind turbines within the HKZ array, and the yellow control tower at Ijmuiden on the Dutch coast — a landmark for any vessel transiting in and out of the port.

For more photography from offshore substations and renewables work, visit the Wind Industry gallery & portfolio.

Wind farm substation

The Hollandse Kust Zuid offshore wind farm is one of the largest in the Netherlands, located in the southern North Sea off the Dutch coast. The offshore substation at its heart collects the electrical output from the surrounding turbine array and transmits it back to shore via subsea cable — a critical piece of infrastructure in any large-scale offshore wind project.

These photographs show the substation from several angles and distances — the platform structure, deck equipment, and its relationship to the turbines and sea around it. Low sun and clear conditions on this rotation made for good contrast across the steelwork and gave the images a cleaner quality than overcast offshore days typically allow.

The project is operated by Vattenfall and connected to the Dutch grid via TenneT, the Dutch and German transmission system operator. It is one of several major offshore wind farms that have shaped the southern North Sea energy landscape in recent years.

For more photography from offshore substations and wind farm operations, visit the Wind Industry gallery.

Turbines in the sun.

Good morning, here are some images of turbines on a north sea windfarm in low light.

Substation in the sun.

Hello,

Today I’d like to share a couple of images of an OSP (offshore substation platform)

I always enjoy, how I can take many photos of the same subject, and with the differing skies and ever-changing weather can change the image.

Which one do you prefer?

Leave a comment over on instagram @lee_ramsden

Thanks

Lee