Inspenet, August 18, 2023.
Tâmega Gigabattery: one of the largest energy storage systems in Europe
Iberdrola has begun the third and final part of its gigantic hydraulic pumping project in Portugal. With the beginning of the filling of the Alto Tâmega dam, the Spanish company marks an important energy milestone for Europe.
As is known, the complex is made up of three power plants, Alto Tâmega, Daivões and Gouvães , and thanks to its pumping capacity, it can store excess energy from renewable sources during off-peak hours, to be used when necessary. support.
The Tâmega Electroproducer System has a capacity between the three facilities of 1,158 MW, 880 MW reversible and is capable of storing 40 GWh, equivalent to the energy consumed by 11 million people during 24 hours in their homes, becoming one of the largest energy storage systems in Europe.
This facility will increase the total electrical power installed in Portugal and will prevent the emission of 1.2 million tons of CO 2 per year . This great engineering work will also prevent the importation of more than 160,000 tons of oil per year and will be a source of job creation in the region.
The last phase to be completed is the Alto Tâmega dam. It is a large double curvature vault dam 104.5 m high, 220,000 m 3 of concrete and 335 m long at the crest.
During this month the river diversion tunnel has been closed and in the next three months approximately a 28 m long concrete plug will be built inside the tunnel that will ensure the closure of the diversion tunnel throughout its useful life of the installation. During these three months, the river flow will continue to flow through the bottom outlets of the dam.
From that moment on, the filling of the Alto Tâmega reservoir will begin, which will have a surface area of 468 ha and a volume of 132 hm3 and it will provide the water necessary for the production of renewable electricity at the power plant at the foot of the Alto Tâmega dam, equipped with two groups with a total power of 160 MW.
Meanwhile, the electromechanical assembly of the plant continues, which is progressing smoothly according to schedule. The turbines of both groups are already fully assembled and the generators are in a very advanced state of assembly.
Once the reservoir has been filled this winter, the first synchronization of a group to the grid is scheduled for January 2024 and the plant will come into commercial operation in March 2024.