Power for a sustainable future » Offshore wind energy from EnBW 2 Power for a sustainable future › Offshore EnBW wind farms in the 3

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EnBW He Dreiht: A major challenge: Innovative ideas – 08 the future of wind energy 10 construction at sea 16 optimised concepts

Hohe See & Albatros 87 turbines The future belongs to renewable He Dreiht energies. And offshore wind power has a key role as we transition to delivering ecological energy. That’s NORTH SEA why we’re pressing ahead at full speed in this challenging field – and Cuxhaven heading into uncharted waters together with our committed team. Norden Our goal: the sustainable generation

Wilhelmshaven Bremerhaven of climate-friendly electricity.

Emden

NETHERLANDS 4 Power for a sustainable future › The future of energy 5

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Our motivation: climate-neutral energy for the future

Guided by the principle “The energy transition means rethinking”, EnBW has long viewed the expansion of climate-friendly renewable energies as its core task. With our Strategy 2025, we continue to meet this challenge and are further strengthen- ing the focus of our company’s realignment towards sustainability. EnBW aims to be ­climate-neutral by 2035. We are consistently transitioning our generation ­port­folio to a new foundation and additionally concentrating our investment on grid expansion and the development of innovative digital solutions for the energy ­sector. All this has one goal: ensuring a viable energy supply for the future.

As one of the largest energy companies in supply system that is based on volatile electricity and Europe, we have made the project generation.

our project. As recently as 2012, conventional energy The expansion of off- generation accounted for almost 80 percent of our Offshore wind energy a key factor Our commitment crosses borders Big plans for breaking records shore wind power income. Today, more than 85 percent of Group earn- Offshore wind energy – like wind farms on land and Thanks to our activities in recent years, we have Despite challenging framework conditions, the expan- reflects the commit- ment of EnBW to con- ings come from the Renewable Energies, Grids and – is a major focus of our activities. This acquired valuable expertise in all aspects of off- sion of wind energy continues at full speed in Germany sistent sustainable Sales segments instead. can be seen from the ever-growing dimensions of our shore wind energy including planning, construction, as well. Between 2020 and 2025, we aim to increase action. projects: from EnBW Baltic 1 in the , Ger­ operation, maintenance and direct marketing of the EnBW wind energy capacities to 4,500 megawatts. Sustainability on course for high-speed growth many’s first commercial , then the much electricity generated. Since offshore has become a Offshore will remain a big part of this development. In recent years, we commissioned more than 1,900 larger EnBW Baltic 2, to two very challenging projects critical cross-border component of the future energy With an installed output of around 900 megawatts, the megawatts of output from renewable energies and in the rough waters of the North Sea – EnBW Hohe See generation scenario, we now aim to apply this expert­ EnBW He Dreiht wind farm in the North Sea repre- already invested some €4.7 billion in renewables as and EnBW Albatros, which were commissioned at the ise in championing sustainable energy generation sents entirely new dimensions and, thanks to innova- part of our Strategy 2020. By 2025, a further €4 billion start of 2020. internationally as well. Alongside our role in develop- tive technology, is a model of economic viability that is are to be spent on the further expansion of wind and ing the offshore industry in Europe, our activities in not dependent on government funding. solar energy and also on fuel-switch measures. In North America and Asia (Taiwan) make us a player in

addition, electromobility is playing an increasingly its global development in other regions too. More on our website at: important role in our portfolio – alongside the develop- www.enbw.com/offshore ment of intelligent grids to meet the challenges of a

During the construc- EnBW EnBW EnBW EnBW tion of EnBW Hohe Baltic 1 Baltic 2 Albatros & He Dreiht See and EnBW Alba- Hohe See tros, “Seafox 2” was used as an accommo- Area 7 km2 27 km2 53 km2 60 km2 dation platform at the site. No. of turbines 21 80 87 Planned

Output 48.3 MW 288 MW 609 MW 900 MW

kWh/year 185 million 1.2 billion 2.5 billion Planned

No. of households supplied/year 50,000 340,000 710,000 ~ 1 million

In operation since 2011 2015 2019 2025*

* Planned commissioning

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Offshore wind energy from EnBW: on course for consistent growth »

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EnBW Baltic 1: the perfect première It all started on 3 April 2011 at 9:55 a.m.: turbine B2 of the EnBW Baltic 1 wind farm fed its first kilowatt hour of electricity into the grid. It was a key moment in this very special project – Germany’s first commercial wind farm in the Baltic Sea and the first offshore wind farm for EnBW.

The 21 turbines of the wind farm – located 16 kilo- at least10MW metres north of the Darß-Zingst peninsula – have a 7 MW 3.6 MW total capacity of 48.3 megawatts and generate around 2.3 MW 185 million kilowatt hours of electricity each year, which is enough to supply 50,000 households. At the The result of dramatic In building, operating Hohe See & advances in technol­ same time, harmful CO2 emissions to the environment This resulted in capacities that can supply the annual The two wind farms were fully connected to the grid and maintaining our Baltic 1 Baltic 2 Albatros He Dreiht ogy: our North Sea wind farms, we give are reduced by 167,000 tonnes. energy needs of around 340,000 households and in January 2020. Their 87 turbines generate 2.5 billion wind farms represent Advances in turbine output the utmost priority to reduce CO2 emissions by around 900,000 tonnes. Each kilowatt hours of green electricity, enough to supply an enormous increase occupational safety. of the 80 turbines on the EnBW Baltic 2 wind farm has 710,000 households – double the capacity of EnBW Bal- in output.

EnBW Baltic 2: new dimensions a rotor diameter of 120 metres and a coated surface tic 2. And annual CO2 emissions are 1.9 million tonnes The EnBW Baltic 2 offshore wind farm was commis- area of 11,000 square metres. lower. Also reflected in these figures is the enormous sioned in summer 2015, becoming the next (nautical) progress made in offshore wind energy technology in milestone on the company’s course en route to the EnBW Hohe See and Albatros: a very short space of time. Output has been increased future of energy: four times larger than EnBW Baltic 1 conquering the North Sea from 3.6 megawatts per turbine at EnBW Baltic 2 to 7 and capable of generating six times as much electricity. The next step followed soon after with a “double strike” megawatts at EnBW Hohe See and Albatros, thanks in in an entirely new area. The EnBW Hohe See and part to the use of state-of-the-art gearless direct-drive The challenges our teams faced constructing EnBW Albatros wind parks are the first EnBW projects in turbines which have fewer components and weigh less. Baltic 2 also reached new dimensions. The location – the North Sea – in cooperation with Canadian energy The rotor surface of each turbine is equivalent in size to 32 kilometres north of Rügen – is further from the coast, infrastructure company Enbridge Inc., which also more than two-and-a-half football pitches. Each tower the water is deeper and the seabed is more ­uneven, holds 49.9 percent of the shares in both wind farms. weighs just under 400 tonnes and the nacelle with rotor which made the foundation work more demanding. blades weighs 360 tonnes. However, our 30-strong construction team always had EnBW Hohe See and Albatros also represented the the situation under control. EnBW logistics experts largest investment in the history of EnBW – around Technology will have advanced still further when we made sure that the right components always got to the €2.2 billion. The site covers an area of 42 square kilo- construct He Dreiht. The turbines on this wind farm are right place at the right time. metres around 95 kilometres north of Borkum and 100 expected to have an output of more than 10 megawatts kilometres north-west of Helgoland – another quantum each. leap compared with the EnBW Baltic projects. 8 Power for a sustainable future › He Dreiht is the next offshore wind farm 9

Baltic 1 Baltic 2 EnBW He Dreiht: the future of wind energy on a very large scale »

Rotor diameter Rotor diameter 93 m 120 m Installed output Installed output 48.3 MW 288 MW Electricity for Electricity for 50,000 340,000 households households

Albatros & He Dreiht Hohe See

The some 150- strong team at the Is there any way of improving on EnBW Hohe See and ogy, the professionalisation of the wind energy sector EnBW Hamburg Albatros to increase efficiency and performance? The and the now enormous experience of EnBW’s offshore office is always open to new chal- clear answer is yes. And this very emphatic answer is experts. And second, its operation will benefit from lenges. now taking tangible and spectacular shape with the cost-reducing synergy effects created by its proximity to planned new EnBW wind farm in the North Sea. EnBW the EnBW Hohe See and Albatros wind farms. EnBW He He Dreiht will revolutionise the wind energy land- Dreiht will be using revolutionary and cost-saving new scape. technology to transfer electricity into the grid. Instead of feeding into a separate offshore substation structure EnBW He Dreiht was the winner of the first German (OSS) as has been the practice to date, the wind farm Rotor diameter Rotor diameter auction for offshore wind farm projects held in April will be connected directly to the TenneT offshore con- 2017. One of the special features of the planned North verter platform via a 66-kilovolt cable. This means it is 154 m Planned Sea wind farm is that it is among the first offshore not necessary to construct an OSS – resulting in a Installed output Installed output wind farms worldwide that will be built without sub­ substantial saving. MW MW sidies. EnBW is thus demonstrating clearly that offshore 609 900 projects can be refinanced on the electricity market In summary, EnBW He Dreiht is one of the largest Electricity for Electricity for approx. offshore projects planned in Europe and pioneering in without government funding if the right project and 710,000 1,000,000 framework conditions are in place. This assessment is the industry. Construction is scheduled to start on the households households based on extensive market analyses, the early involve- 60-square-kilometre site in 2023, with commissioning ment of potential suppliers and, not least, the advanta- of a total output of 900 megawatts planned for 2025. geous framework conditions. First, the new wind farm is benefiting from the dramatic advances in techno­l­ Click here for the animated version 10 Power for a sustainable future › Construction at sea The installation ships “Brave Tern”, “Blue Tern” and “Fred Olsen Windcarrier” have each loaded the com- ponents for four tur- bines in the Danish port of Esbjerg. A major challenge: construction at sea »

Constantly changing weather conditions, wind, waves Moving enormous components and a lack of firm ground underfoot: construction at › Monopiles – or tripod constructions (jackets) for sea is characterised by its own rules. Organisational greater depths – are the foundations of the towers. precision and enormous flexibility are required in They are anchored into the seabed by special ships. equal measure. Varying sea depths require highly cus- › A massive installation ship then transports the tomised solutions. And there are few other places than pre-assembled components – the steel towers, the high seas that challenge humans and technology to nacelles and rotor blades – to the site, where a crane such an extent. carefully positions the towers on the foundations. wind farm will be the first to do without an offshore › The nacelles – each containing a generator and gear- sub­station structure. Special cable ships supported Good planning is critical box and weighing hundreds of tonnes – and the rotor by teams of divers and underwater robots install the The start of any project requires enormous planning blades are then installed. cables on the wind farm. and development expertise. Engineers, economists, logistics experts, surveyors, geologists and marine The largest single component of previous offshore Work-life balance at sea biologists all work hand in hand – often across wind farms has been the steel substation platform. So what about the people involved? The technicians national borders – to prepare for the tightly scheduled At the EnBW Hohe See wind farm, the fully equipped working to construct EnBW Baltic 1 were shuttled Once they arrive on- construction phase at sea. The final act is the direct platform weighs 4,200 tonnes and stands on eight from land to their workplace every day. Things were site, the compo- struggle against the power of the elements. piles driven into the bed of the North Sea. The sub- different for EnBW Baltic 2 and in the North Sea. nents are installed on the foundations station platform at EnBW Baltic 1 weighs 900 tonnes. Because the sites were some 100 kilometres from the that are anchored As described above, the planned EnBW He Dreiht coast, it was almost impossible for people to just go on the seabed. home at the end of the day. Instead, the technicians were accommodated on the installation and service ships – with single and double cabins, offices, a spare parts store and leisure facilities such as a small gym. A large double bub- Sustainability in environmental protection as well ble curtain was used In terms of scheduling, the suppliers of the main At the planning stage of our projects, we work with as a noise protection components for EnBW Hohe See were commissioned Germany’s Federal Maritime and Hydrographic Agency system for the EnBW Hohe See and Alba- to begin manufacturing in February 2017. Installation (BSH) to ensure that wind farms have the minimum tros projects. started in the second half of 2018. The wind farm came possible impact on the environment. Extensive studies on stream at the end of 2019. commissioned by EnBW from experts including ben- thologists, marine biologists and ornithologists have a substantial influence on the detailed planning. Particu- larly sensitive areas are designated as marine protected areas where no construction or other work is permitted. 12 Full speed ahead › Offshore wind energy from EnBW 13

Everything under control en route to the customer »

99.2% 98.7% The substation for So that our wind farms can supply climate-friendly 98.8% 98.1% EnBW Hohe See electricity to hundreds of thousands of households weighs 4,200 tonnes and is supported on whatever the wind or weather, they are equipped with eight piles driven into high-performance and precise technology that allows the seabed. the function of the turbines to be constantly adapted to 2018 2019 prevailing conditions. › Wind speed of 3 to 5 metres per second: The turbines start automatically. › From approx. 13 metres per second: The turbines EnBW Baltic 1 EnBW Baltic 2 deliver maximum output. Constant output is main- tained by varying the pitch of the rotor blades. Record availability levels at the EnBW wind farms in the Baltic Sea: › Above 25 metres per second (force 10): The turbines Careful maintenance pays off, ensuring nearly 100-percent availability of our wind farm. shut down automatically as a safety precaution.

At a substation, the electricity generated is trans- However, operating and maintaining wind farms is not formed from 33 kilovolts to 150 kilovolts and then just about output and efficiency. We are constantly transported via cable to land. A transformer station analysing the environmental effects of our turbines so increases the voltage to 380 kilovolts, which is neces- we can identify and proactively avoid any impact on the sary for long-distance transmission. The electricity marine environment. can now be fed into Germany’s integrated grid. The pioneering EnBW He Dreiht project will do without Wind farm operation as a service the enormous substation platform in order to achieve We are happy to make our extensive operating expertise massive cost savings. Instead, the electricity will in offshore wind energy available to other companies as be transferred via a 66-kilovolt cable directly to the part of tailored service packages. The modular EnBW offshore converter platform operated by our partner service portfolio brings together experts from many TenneT. different areas so that customers – for example, other offshore project developers – don’t need to establish Efficient and responsible wind farm operation their own costly capacities. If necessary, they can The sea is a challenging environment for even the draw on the full range of expertise offered by our large most robust technology. That’s why our wind farms energy company. are monitored around the clock and maintained and repaired by specially trained teams of technicians. ­ The full portfolio of operation services It’s a very demanding task. Each day brings new sur- › Operation of wind energy plants and substations prises in very demanding situations. Organisational › All maintenance and repair work precision and enormous flexibility are required in › Balance of plant, including logistics equal measure. At the same time, we focus particu- › Full infrastructure services including a dedicated 24/7 larly on occupational safety, achieving high standards control centre through innovative concepts. › Condition monitoring for turbines and foundations 14 15

The special ship “Bibby Wavemaster Horizon” ensures safe maintenance and operation at the EnBW Hohe See and Albatros wind farms.

In August 2020, Everything under control  EnBW Hohe See and Albatros Together we are stronger through to commissioning. Enbridge also supported the service hub The two EnBW wind farms in the North Sea are One key principle applies in all EnBW wind farm the practical work with its own specialists integrated for EnBW Baltic 2 opened in the EnBW Baltic 1 served by the innovative ship “Bibby Wavemaster projects: spreading the load ensures greater stability. into the EnBW team. EnBW is now solely responsible Danish port of ­Horizon” that was specially designed for offshore ser- That’s why we always cooperate with strong and com- for the operation and maintenance of the finished For around ten years, everything has been Klintholm. looked after from the EnBW Barhöft Service Station. vice. Working from the Emden service location, where mitted partners to meet the challenges of the offshore wind farms. Maintenance work is performed from a special ship. the warehouse and back office are located, it ensures sector. Since early 2017, an innovative digital system has been efficient operation and cost-saving maintenance. This in use. Each technician is assigned tasks via a tablet enables the technicians to quickly rectify any faults In the case of EnBW Baltic 1, 19 municipal utilities computer and documents the work performed via and ensure the rapid return to operation. were brought on board via a holding company. After an app. commissioning, around half of the shares in EnBW Our ship is the most modern of its kind with a full Baltic 2 were sold to Australian financial investor EnBW Baltic 2 range of high-tech equipment. It can carry 60 people ­Macquarie. Operation and maintenance remained Rostock was the original service location for for up to 30 days. In addition to offices and cabins, the entirely in the hands of EnBW. Baltic 2. In August 2020, a new state-of-the-art ship has communal spaces, a spare parts store and a service hub opened in the Danish port of Klintholm, sick bay. So that technicians can safely reach the wind And we’ve applied this proven concept to our North which is far closer to the wind farm. This means that turbines in even the worst weather conditions, the Sea projects as well: 49.9 percent of the shares in the service technicians can live on shore during their “Bibby Wavemaster Horizon” has a specially devel- EnBW Hohe See and Albatros are held by Canadian deployment. oped 1.2-metre-wide gangway that can dock with the energy infrastructure company Enbridge – EnBW foundation of the turbine tower by way of sensors and owns the remaining 50.1 percent. Both partners jointly a hydraulic system. financed the offshore wind farms from construction 16 Power for a sustainable future › Innovations 17

Innovative ideas – optimised concepts »

Ongoing innovation is an integral aspect of our offshore activities. Again in cooperation with committed part- ners, we are involved in a wide variety of fields. Here are Floating wind power plants just a few examples... The Nezzy2 project in collaboration with aerodyn engineering focuses on two 18-metre model wind turbines installed on floating platforms. The ques- tion was whether the principle of floating wind power plants could be implemented on a large scale so that there is no need for major foundation work. This was what the research project set out to answer by way of tests carried out in a flooded gravel pit, in the Baltic 360° safety training Sea and, lastly, with full-scale plants in China. Positive results would mean this kind of plant could be used for During this virtual tour of the wind farm, which we’ve offshore wind farms in entirely new locations. already used many times to train employees, safety Click here for the film information is displayed at all relevant locations. The training can be done on the employee’s computer or, more impressively, using VR equipment.

Using drones to supply wind farms

Sensors for safe monitoring This research project is examining whether it will be possible in the future to transport materials Our CMS (Condition Monitoring System) is one of the by drone – making the construction and operation of best products of its kind. It makes it possible to optimise wind farms even more economical. condition monitoring of wind energy plants using state-­of- the-art sensors and specific data so that we can identify problems before they have a negative impact.

Offshore Wind Accelerator – OWA

Training via VR and AR Since April 2016, EnBW has been involved in working groups and the Steering Committee of this programme Our successful research project to train service tech- that brings together a large number of project develop- nicians using virtual and augmented reality focuses on ers and operators. The goal is to develop new technol- qualifying young talents in technical disciplines. With ogies, standards and processes that will further reduce VR goggles and digital tools, the trainees are able to the costs of offshore wind energy and improve health practice working at dizzying heights. Our partner here and environmental protection. was the Hamburg University of Applied Sciences with its Creative Space for Technical Innovations (CSTI). We are currently testing the use of augmented reality to provide circuit diagram information.

If you would like to know more about our offshore activities or you are interested in a partnership with EnBW, please visit our website at www.enbw.com/offshore or contact us directly. 18 Power for a sustainable future › Offshore EnBW turbines in the Baltic Sea 19

Baltic 2 EnBW 80 turbines Klintholm service hub

Baltic 1 21 turbines RÜGEN Sassnitz FEHMARN Zingst It’s only by looking forward and using BALTIC EnBW Barhöft our experience that we are able to service station reach ambitious goals. This means that what we’ve achieved so far is just one Rostock milestone. The next plans are already

in the pipeline… Lübeck

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Schelmenwasenstraße 15 70567 Phone +49 (0) 711 289-0 Fax +49 (0) 711 289-82180

Hamburg office Fischertwiete 1 Chilehaus Entrance B 20095 Hamburg Phone +49 (0) 40 533268-213 [email protected] www.enbw.com/offshore