The INROS LACKNER AG (ILAG) is a German Consultant with several offices in Germany and Worldwide. Fields of expertise are Hydraulic Engineering, Port Design and Logistics, Environmental Design, Building and Infrastructure Design.
In the field of renewable energies, ILAG offers its Consultant services for Offshore Wind Farms (OWF) located in the Baltic Sea and North Sea. OWF have multiple interfaces during planning and construction.
Baltic I in the Baltic Sea is an OWF, consisting of 21 wind turbines and it will be the first commercial offshore windfarm in Germany. Each turbine will deliver 2.3 MW and a total of some 50 MW. The produced energy will be transformed to HV alternating current at an offshore transformer platform which is located within the farm. The power is then transmitted by a 150 kV cable to the national supply grid. At the OWF the water depth is approximately 16 to 18 m. The hub height of the wind turbines is 67 m above MSL.
ILAG was appointed for several services during the design and construction period, including the design basis of the foundation structures: monopiles. The piles have a diameter of some 5m and are installed by ramming to a depth of up to 25 m below the seabed to transfer environmental loads from wind, waves and ice to the ground.
ILAG is also appointed for the design, permitting services, site supervision, quality control and documentation as well as the development and monitoring of the QHSE plan and health and safety of the 61 km sea cable connecting the transformer platform with the land based transformer station and 15 km land cable.
Baltic I is now in the construction phase and will be connected to the grid in 2011.
In 2009, ILAG was appointed to support the review of logistics, design, operational concept as well as geotechnical investigations of the offshore works for Global Tech I. Global Tech I will consist of 80 5 MW wind turbines which will be constructed in the North Sea, delivering approximately 400 MW to the national power supply grid.
The Offshore Wind Farm sector is challenging as engineers can no longer draw on their previous experiences. The creative and multidisciplinary teams of the ILAG overcome these challenges with efficient planning and their in-house expertise.
Yvonne Degraa, Graduate Member in Germany