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    Francis-type runner for a turbine, and energy conversion plant comprising such a runner
    151.
    发明授权
    Francis-type runner for a turbine, and energy conversion plant comprising such a runner 有权

    公开(公告)号：US10125737B2

    公开(公告)日：2018-11-13

    申请号：US14741996

    申请日：2015-06-17

    Applicant: ALSTOM Renewable Technologies

    Inventor： Thomas De Colombel

    IPC: F03B3/02 ,  F03B3/12 ,  F03B11/02

    Abstract: This Francis-type runner for a turbine includes a crown, a band and blades the number of which is not a prime number. These blades are made as one piece and extend between the crown and the band, and between a leading edge and a trailing edge each trailing edge has its concave face facing upstream over its entire length. In addition, first blades are uniformly distributed about a central axis of the runner in a number equal to a divisor of the total number of blades. Each of these first blades has a point of attachment of its trailing edge to the crown that is lowered by comparison with the point of attachment of the trailing edge to the crown of second blades, which are likewise part of the runner. Moreover, the ratio between, on the one hand, the radius of a circle centered on the central axis of the runner, perpendicular to this axis and passing through the point of attachment of the trailing edge of a first blade to the crown and, on the other hand, the radius of a circle centered on the central axis of the runner perpendicular to this axis and passing through the point of attachment of the trailing edge of the same blade to the band is less 0.15.

    FRETTING CORROSION AND METHODS OF OPERATING A WIND TURBINE
    154.
    发明申请
    FRETTING CORROSION AND METHODS OF OPERATING A WIND TURBINE 审中-公开

    公开(公告)号：US20180112646A1

    公开(公告)日：2018-04-26

    申请号：US15537648

    申请日：2015-12-17

    Applicant: Alstom Renewable Technologies Wind B.V.

    Inventor： Jaume BETRAN PALOMAS ,  Pau NUALART ,  Jordi MERCADÉ

    IPC: F03D7/02

    CPC classification number: F03D7/0276 ,  F03D1/06 ,  F03D7/0224 ,  F03D7/026 ,  F03D9/25 ,  F05B2270/32 ,  Y02E10/723

    Abstract: Methods of operating a wind turbine including one or more geared pitch systems. The method comprises a sub-nominal zone of operation for wind speeds below nominal and a supra-nominal zone of operation for wind speeds equal to or above the nominal. The sub-nominal zone of operation comprises a first operational range extending from a cut-in wind speed to a first wind speed and a second operational range extending from the first wind speed to a second wind speed, and the first operational range comprises two or more sub-ranges, wherein a different constant pitch position is defined for each of the sub-ranges. The method further comprises in the first operational range, using the geared pitch systems for setting the blades in the pitch position defined for each sub-range as a function of the current wind speed.

    Wind turbine rotational system
    157.
    发明授权
    Wind turbine rotational system 有权

    公开(公告)号：US09909565B2

    公开(公告)日：2018-03-06

    申请号：US14758791

    申请日：2014-01-14

    Applicant: ALSTOM RENEWABLE TECHNOLOGIES

    Inventor： Pedro Palomares Rentero

    IPC: F03D7/04 ,  F03D7/02 ,  F03D1/06

    CPC classification number: F03D7/044 ,  F03D1/06 ,  F03D7/0204 ,  F03D7/0224 ,  F03D7/047 ,  F05B2240/40 ,  F05B2270/111 ,  Y02E10/721 ,  Y02E10/723

    Abstract: Wind turbine rotational system having several drives and a central control system (CCS), each drive comprising a motor, an electronic converter and an actuator. The CCS sends speed and torque setpoints to the electronic converters which drive the motors according to said setpoints. Operation of the system comprises: designating a drive as master and the other drives as slaves; designating, for each slave, one of the drives as reference drive; the CCS determining master speed and torque setpoints, and sending them to the master; the CCS obtaining real torque of the master; CCS obtaining real speed of each reference drive; and the CCS sending to each slave a slave speed setpoint equal to the master speed setpoint, and a slave torque setpoint equal to the real torque of the master plus a variable offset based on a difference between the master speed setpoint and the real speed of its reference drive.

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