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HVDC Connection of Offshore Wind Farms to the Transmission System

pubblicazioni - Articolo

HVDC Connection of Offshore Wind Farms to the Transmission System

Abstract–This paper presents a technical and economical analysis to evaluate the benefits and the drawbacks of grid connecting offshore wind farms through a DC link. A first case, concerning a 100 MW wind farm is thoroughly investigated and cases of larger wind farms (sized 200 MW and 500 MW) are presented as well. Three different transmission solutions are compared: 150 kV AC, 400 kV AC and high voltage DC based on voltage sourced converters (VSC-HVDC). After a brief overview of the features of these connection solutions, the related operational aspects are evaluated. An economical assessment compares the DC connection option to the AC alternatives, taking into account the costs for investments, costs for operation and maintenance the valorization of losses and energy not supplied. The economic assessment includes sensitivity analyses concerning various parameters which could impact on the economics of the 100 MW wind farm: distance, costs and reliability of components and the level of losses in DC converters. The work presented in this paper has been performed in the 5th European Framework Research and Development Program "Benefits of HVDC Links in the European Power Electrical System and Improved HVDC Technology" (contract N°ENK6-CT-2002-00670). We thank the "HVDC" consortium for permission for publication. P. Bresesti and R. Vailati are with CESI RICERCA, via Rubattino 54, 20134 Milan, Italy; (e-mail: paola.bresesti@cesiricerca.it, riccardo.vailati@cesiricerca.it). R. L. Hendriks is with Delft University of Technology, the Netherlands (e- mail: R.L.Hendriks@ewi.tudelft.nl). W. L. Kling is with Delft University of Technology and with TenneT TSO bv, Arnhem, the Netherlands (e-mail: w.kling@tennet.org).

HVDC Connection of Offshore Wind Farms to the Transmission System

Paola Bresesti, Member, IEEE, Wil L. Kling, Member, IEEE, Ralph L. Hendriks, Member, IEEE, and Riccardo Vailati PUBBLICATO 06005215 (PAD – 740834)PUBBLICATO 06005215 (PAD – 740834)

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