Variable Speed Wind Turbine equipped with a Synchronous Generator
Author
Freitag, Christian
Term
3. term
Education
Publication year
2011
Submitted on
2011-01-04
Pages
80
Abstract
Dette speciale udspringer af et projektforslag fra Vestas Wind Systems A/S, en af verdens førende producenter af vindmøllesystemer. Det undersøger havvindparker, hvor turbinerne er forbundet med jævnstrøm (DC), og hvor elektriciteten føres til land via en højspændt jævnstrømsforbindelse (HVDC). Denne løsning er lovende i lyset af stigende elforbrug og de lange afstande mellem hav- og landanlæg. Hovedmålet er at udvikle stationærtilstandsmodeller (modeller af drift under normale, stabile forhold) af et helt vindmøllesystem. Arbejdet fokuserer på udvalgte AC-DC-konvertere mellem generatorens udgang og turbinernes DC-forbindelse, dvs. de enheder der omdanner generatorens vekselstrøm til jævnstrøm til DC-nettet.
This master's thesis was initiated by a project proposal from Vestas Wind Systems A/S, a leading wind turbine manufacturer. It explores offshore wind farms in which turbines are interconnected using direct current (DC) and power is transmitted to shore via a high-voltage direct current (HVDC) link. This approach is promising given rising electricity demand and the long distances between offshore sites and the mainland. The main objective is to develop steady-state models (models of operation under normal, stable conditions) of a complete wind turbine system. The work focuses on selected AC-DC converters between the generator output and the turbines' DC connection, that is, devices that convert the generator's alternating current into direct current for the DC network.
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