Method of servicing wind power plant using azimuth angle

摘要

The invention concerns a method for the determination of an azimuth angle for servicing purposes (αw) of a wind power plant with a machinery housing that is rotatable on a tower through an azimuth angle (α) and a rotor that is rotatable on a machinery housing through a rotor angle (δ) such that a plurality of combinations of rotor angles (δ) and azimuth angles (α) is adjusted, that are determined at the rotor subject to the influence of a turbulent wind field, which is effecting torques, for the adjusted combinations of rotor angles (δ) and azimuth angles (α) and the associated azimuth angle (α), a torque envelope of the torque-azimuth angle associations is determined, surrounding areas (U(α)) with comparable sector sizes of the azimuth angle (α) are generated and associated magnitude values of the torque envelope are determined, a surrounding area (U(αw)) with magnitude-wise smaller torque envelope values than the neighboring surrounding areas is selected and the azimuth angle for servicing purposes (αw) is determined within the selected surrounding area (U(aw)).

主权项

1. Method for servicing a wind power plant having a machinery housing that can be rotated on the tower through an azimuth angle (α) and having a rotor that can be rotated on a machinery housing through a rotor angle (δ), comprising the steps of:
i) determining for servicing purposes an azimuth angle by: adjusting a plurality of combinations of rotor angles (δ) and azimuth angles (α) by modifying the azimuth angle (α) for a plurality of locked rotor angles (δ) or by modifying the rotor angle (δ) for a plurality of locked azimuth angles (α); determining torques acting at the rotor subject to the wind field for the adjusted combinations of rotor angle (δ) and azimuth angle (α);
associating an assigned azimuth angle (α) with the torques;determining the torques by modifying the azimuth angle (α) for a plurality of locked rotor angles (δ) or by modifying the rotor angle (δ) for a plurality of locked azimuth angles (α);determining a torque envelope as the envelope of all torque-azimuth angle associations;forming surrounding areas (U(α)) with comparable sector size of the azimuth angles (α), and determining associated magnitude values of the torque envelopes;selecting a surrounding area (U(αw)) with magnitude-wise smaller torque envelope values than the neighboring surrounding areas; anddetermining the azimuth angle for servicing purposes (αw) which has the smallest magnitude value of the torque envelope within the selected surrounding area (U(αw)); and ii) rotating the machinery housing into the azimuth angle for servicing purposes (αw) with a fixed rotor angle (δ).