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www.eon-netz.com
2. Energinet dk (2004) Wind turbines connected to grids with voltage above 100 kV Technical regulation TF 3.2.5.
www.energinet.dk
3. ESB National Grid Ireland (2007) Grid code version 3.0. 28th Sep 2007
4. National Grid Electricity transmission plc (2007) The grid code. Issues 3, Revision 24, UK
5. REE (2005) Requisitos de respuesta frente a huecos de tension des las instalaciones de produccion de regimen especial. PO 12.3, Spain