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16,000 MEGAWATTS OF CERTIFIED WIND POWER
Spain firmly supports wind energy and proof of this are the 18,500 megawatts (MW) that have been installed across the country. According to Royal Decree 661/2007 on renewable energy sources, wind farms shall be able to endure voltage dips (disturbances in the electrical network generally caused by a short-circuit). Thus, the installations have to be able to endure these voltage dips without disconnecting from the network since otherwise the stability of the electrical system of the Iberian Peninsula would be at risk.

In order to prove that wind farms producing electrical energy have this ability, AENOR developed a specific certification system two years ago. Today, 595 wind farms have already received this certification, which means that there is a total of 16,285 megawatts (MW) of certified installed power.

To be awarded said certification, field tests have to be conducted on the wind turbine generators, as well as modelling of the individual wind turbine generators and other integrated devices to ensure the farm’s fulfilment (FACTS devices).

Finally, a simulation of the wind farm’s performance as a whole is carried out.
Adapting wind farms to these requirements allows in practice to increase the energy generated by the certified installations, as the disconnections imposed by the electrical system operator (Electrical Network) when the network becomes congested are reduced. In other words, due to the fact that more stability is ensured, certified wind farms are authorised to operate in specific conditions in which they used to be forced to disconnect.
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