Amontada Wind Power Complex starts generating energy from clean renewable source
With 75.6MW of installed capacity, the new Queiroz Galvão Energias Renováveis's Wind Power Complex starts operating in test mode
11/Jul/2014 - By Press Officce
In January 2013, Queiroz Galvão Energias Renováveis started a new important phase: the implementation of the Amontada Wind Power Complex, in the state of Ceará. The Wind Farm started operating in test mode – the phase that precedes the beginning of commercial operation – earlier this month, July 2014. The complex has a total of 28 wind turbines and 75.6MW of installed capacity.
Its construction can be divided into five phases: feasibility studies and licensing, construction works, electric works, electro-mechanical assembly (tower, nacelle, hub, blades) and tests. The construction phase demanded the largest number of workers - approximately 600, followed by the electric works, with 250 workers, and the electro-mechanical assembly, with around 200 workers.
Hiring local work force was a priority. This company policy ensured not only jobs and income but also training for the local workers. During the construction works, for instance, approximately 75% of the workers lived in the vicinity and received training through theoretical presentations and practical demonstrations.
The strong winds that determined the choice of the site for the wind farm were a challenge for the engineering teams. Assembling the equipment under those conditions requires experience and discipline. Therefore, anemometers were installed on top of the cranes to measure wind speed. This allowed the team to identify the best times to assemble the equipment efficiently and safely.
Equally important were the Daily Safety Meetings held every day before work, where a specialized professional gave workers guidance. And every assembly operation conducted at the Wind Power Complex has at least one safety technician to monitor the entire process.
The construction works of the Amontada Wind Power Complex were carried out in two stages. The first stage involved the implementation of internal and external access roads. To give an idea of the magnitude of the project, more than 12 km of internal access roads were built. Next, the foundations of the wind turbines were prepared with the concreting of big supports for the towers.
Scheme of the supports (yellow) and foundation
The electric works comprised two large systems: underground medium voltage network and extension of the elevating substation.
The high voltage transmission line and the connecting bay, which are crucial for the system, were shared from the Icaraí Wind Power Complex, located in the same region. The Icaraí Wind Power Complex is also owned by Queiroz Galvão Energias Renováveis (QGER) and has been operating commercially since March 2014.
All this work is done so the energy produced by the wind turbines can reach the National Interconnected System.
Scheme of the entire power grid
The Amontada towers are made of metal and have four segments which together measure 89 meters in height and weigh nearly 250 tons. Two different types of cranes are needed to place the segments on top of each other, one with capacity to lift 500 tons and one for 600 tons.
Height and weight table
NACELLE AND HUB
Once the tower is assembled, the nacelle needs to be installed, followed by the hub. The nacelle weighs 84 tons, while the hub weighs 56 tons. Both require a crane with capacity to lift 600 tons to be installed.
The mechanical force generated by the wind is turned into energy inside the nacelle, where the generator and the transformer are installed. The hub is the piece that connects the three blades, also known as the nose of the turbine.
The blades are the last pieces to be installed and two cranes are needed for this operation, one with capacity to lift 500 tons and one for 600 tons. Each blade is 60 meters long and weighs 8 tons.
COMPLETE WIND TURBINES
The final weight is 413 tons, the same of 413cars piled up. This weight is very different from that of the wind turbines of the Taíba and Icaraí Wind Power Complexes (also owned by QGER), because different technologies are used. In Taíba and Icaraí, the towers are made of concrete, while in Amontada, they are made of steel. (See the assembly of the wind turbines on concrete towers here ).
The table shows the total weight of the equipment
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