Vestas Wind Systems A/s

Kim Brøndum Larsen

Gert Karmisholt Andersen

John Godsk Nielsen

Flemming Buus Bendixen

Kheng Hong Ang

Ove Styhm Kristensen

Bo Yin

Mogens Lønberg Lau

An electric power generator system is provided with improved power efficiency due to a reduced sensitivity to errors in the sensing of angular rotor position. The system includes a power generator with a rotor, and a position encoder connected to sense angular position of the rotor and to generate a position signal accordingly. A processor receives the position signal, calculates an angular position in response, calculates an estimated angular position based on earlier received position signals, and finally generates a processed angular position based on the calculated angular position and the estimated angular position. This processed angular position is a more reliable measure of the rotor position, reducing the influence of short-term errors in the position signal, allowing normal wind turbine operation during temporary position encoder failure, and allowing an orderly shutdown during complete position encoder failure.

Generator system with intelligent processing of position signal

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Hadsund, Denmark

Kim Brøndum Larsen