WIND TURBINE SPEED CONTROL BY AUTOMATIC YAWING.

Kurt H. Hohenemser, Andrew H.P. Swift

    Research output: Contribution to journalArticlepeer-review

    7 Scopus citations

    Abstract

    A yaw dynamics analysis was developed for a two-bladed horizontal axis wind turbine with passive cyclic pitch variation achieved by letting the blade pair freely oscillate about a common axis with which the blades formed a small prelag angle. This type of rotor was found capable of high yaw rates without imposing vibratory hub moments and without producing noticeable flapping amplitudes. Experiments were conducted with a tail vane stabilized 7. 6-m-diam wind rotor driving a three-phase alternator tuned and loaded to produce a rotor torque proportional to the square of the rotor speed. Two yaw control systems which replaced the usual blade feathering controls were investigated: an active yaw control system using a hydraulic rotor speed governor, and a passive system responding to a combination of rotor thrust and torque. During strong gusts both systems limited rotor speed quite accurately.

    Original languageEnglish
    Pages (from-to)237-242
    Number of pages6
    JournalJournal of energy
    Volume7
    Issue number3
    DOIs
    StatePublished - 1983

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