Without a doubt one of the most critical and important tests for Adwen in a turbine of this size is the rotor and hub rotation (point of the turbine where the blades will be installed) to verify that the structure and mechanical coupling, in addition to the lubrication system, are perfectly installed to ensure its operation.
To perform this critical test, the huge 8MW multipole synchronous generator must be powered to simulate the future generation mode and thus cause the rotor and hub to rotate at controlled speeds. The test has to be performed at the onshore facilities, before the turbine is installed on the seabed, with the highest possible reliability.
The proposed Bonfiglioli solution is a rotating tool that allows the rotation of the turbine rotor and hub through a low voltage frequency inverter. The container, specially adapted to the needs of the AD 8-180 turbine and suitable for working in harbours and ships, is powered at low voltage and provides the output power supply voltage suitable for the turbine.
This solution is totally versatile and stable, it also provides a cost reduction in the testing phase and simplifies the operation, which is a highly appreciated feature. The equipment that allows the smooth operation of this solution is Bonfiglioli's 315kW ACTIVE CUBE 8 frequency inverter which, thanks to its robust and efficient standard control firmware, allows controlling the 8MW motor through a medium voltage transformer without the need for a feedback signal.
Adwen professionals involved in the project expressed their satisfaction with the Bonfiglioli solution stating the high level of professionalism and positive attitude demonstrated at all project milestones, as well as the quality and robustness of the equipment supplied. Particularly noteworthy is the involvement of the Bonfiglioli team over the last few weeks, during the assembly, delivery and commissioning phases of the mobile inverter/rotating unit of the impressive AD 8-180 turbine.