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249 条记录 (耗时 0.018 秒)

    CONTROLLING THE TIMING OF A TRANSFORMER TAP CHANGE
    1.
    发明公开
    CONTROLLING THE TIMING OF A TRANSFORMER TAP CHANGE 审中-公开

    公开(公告)号：EP4270772A1

    公开(公告)日：2023-11-01

    申请号：EP22382386.5

    申请日：2022-04-25

    申请人： Siemens Gamesa Renewable Energy Innovation & Technology S.L.

    发明人： The designation of the inventor has not yet been filed

    IPC分类号： H02P13/06 ,  H01F29/04

    摘要： A method of generating a timing control signal (80) for controlling the timing of a change of a transformer tap of a transformer (20) is provided. The transformer (20) comprises an on-load tap changer (30) comprising plural respective transformer taps (25-27). The method comprises monitoring a voltage on a primary side and/or on a secondary side of the transformer (20) to obtain a monitoring signal (91) and deriving, from the monitoring signal (91), an intermediate signal (95) that is indicative of at least one zero crossing of a tap voltage at the transformer tap (25-27). Deriving the intermediate signal (95) comprises estimating, based on the monitoring signal (91), a phase of the monitored voltage to obtain a phase signal (94) and applying to the phase signal a phase correction for a phase shift between the monitoring signal (91) or a signal derived therefrom and the tap voltage at the transformer tap (25-27). The timing control signal (80) is derived from the intermediate signal (95).

    CONTROLLED SWITCHING CURRENT OF AN ON-LOAD TAP CHANGER OF A WIND TURBINE
    6.
    发明公开
    CONTROLLED SWITCHING CURRENT OF AN ON-LOAD TAP CHANGER OF A WIND TURBINE 审中-公开

    公开(公告)号：EP3591821A1

    公开(公告)日：2020-01-08

    申请号：EP19184064.4

    申请日：2019-07-03

    申请人： VESTAS WIND SYSTEMS A/S

    发明人： HILLEBRANDT, Jesper ,  KJÆR, Philip Carne

    IPC分类号： H02M1/32 ,  H02J3/38 ,  H01F29/02 ,  H01F29/04 ,  H01H9/00 ,  H02M1/00

    摘要： The invention relates to a method for controlling a wind turbine which comprises a transformer has a variable turns ratio such as an on load tap changer transformer. The adjustment of the turns ratio is possible when a primary side current or a secondary side current of the transformer is less than a switching current threshold. The method comprises operating the wind turbine so that the primary or secondary side current is above the switching current threshold. In response to obtaining a condition for changing the turns ratio of the transformer, the wind turbine is operated so that the primary or secondary side current is reduced below the switching current threshold so that the turns ratio can be changed during the temporary current reduction.

    POWER SUPPLY ARRANGEMENT FOR DIRECT ELECTRICAL HEATING OF A PIPELINE SYSTEM
    8.
    发明授权
    POWER SUPPLY ARRANGEMENT FOR DIRECT ELECTRICAL HEATING OF A PIPELINE SYSTEM 有权

    公开(公告)号：EP2324550B1

    公开(公告)日：2018-12-05

    申请号：EP09781045.1

    申请日：2009-07-24

    申请人： Siemens Aktiengesellschaft

    发明人： RADAN, Damir

    IPC分类号： H02M5/14 ,  H01F29/04 ,  H02J3/26

    CPC分类号： H02M5/14 ,  F16L53/37 ,  H01F29/04 ,  H02J3/26 ,  H05B2214/03 ,  Y02E40/50

    摘要： The invention relates to a power supply arrangement for supplying electrical power to the pipeline. The power supply arrangement (100) for direct electrical heating of a pipeline system comprises basically of a three phase transformer (2), a symmetrization unit (14), a compensation unit (22). The three phase transformer (2) is adapted to support a single phase load (4) connected between a first phase (6) and a second phase (8) of the transformer (2). The transformer (2) comprises at least one first tap changer (10) at a high voltage side (12) of the transformer (2). The symmetrization unit (14) comprising a first capacitor means (16) connected between the first phase (6) and a third phase (18) of the transformer and an inductor means (20) connected between the second phase (8) and the third phase (18) of said transformer (2). The compensation unit (22) comprising a second capacitor means (24) connected between the first phase (6) and the second phase (8) of the transformer (2). The first tap changer (10), the first capacitor means (16), the second capacitor means (24) and the inductor means (20) are adapted to be varied on-load.

    PERMANENT MAGNET DRIVE ON-LOAD TAP-CHANGING SWITCH
    9.
    发明公开
    PERMANENT MAGNET DRIVE ON-LOAD TAP-CHANGING SWITCH 审中-公开
    永久磁铁驱动有载自动切换开关

    公开(公告)号：EP3242303A1

    公开(公告)日：2017-11-08

    申请号：EP15874613.1

    申请日：2015-01-28

    申请人： Diao, Junqi

    发明人： Diao, Junqi

    IPC分类号： H01H1/56 ,  H01F29/04

    CPC分类号： H01F29/04 ,  H01H1/56 ,  H01H9/0016 ,  H01H36/0073

    摘要： A permanent magnet drive on-load tap-changing switch comprising a changing switch circuit. The changing switch circuit comprises an odd-numbered tap-changing circuit and an even-numbered tap-changing circuit that are structurally identical. The tap-changing circuits comprise working contactors (K1/K2) and dual-contact synchronous transition contactors consisting of primary contactors (k1/k2) and secondary contactors (k1'/k2'). The working contactors and the dual-contact synchronous transition contactors each face directly a moving contactor (1). The moving contactors are connected in parallel to each other. A permanent magnet (2) is fixed on each moving contactor. The permanent magnets face directly on the other extremity thereof a moving contactor driving mechanism. The moving contactor driving mechanism changes a force applied to the permanent magnets and thereby allowing the moving contactors to come into contact with or be separated from the working contactors and the transition contactors, thus implementing changeover from one tap to another tap. The permanent magnet drive on-load tap-changing switch is structurally simple and convenient to use, obviates the need for a high-speed mechanism, implements changing by means of direct actions of the contactors, operates at high speed and reliably, and has a low failure rate and an extended service life.

    摘要翻译： 一种永磁体驱动有载分接开关，包括一个变换开关电路。 改变开关电路包括结构相同的奇数抽头变换电路和偶数抽头变换电路。 分接变换电路包括由主接触器（k1 / k2）和次接触器（k1'/ k2'）组成的工作接触器（K1 / K2）和双接触同步过渡接触器。 工作接触器和双触点同步过渡接触器均直接面向移动接触器（1）。 动触头彼此并联连接。 永磁体（2）固定在每个运动的接触器上。 永磁体在其另一端直接面对运动的接触器驱动机构。 运动的接触器驱动机构改变施加到永磁体的力，从而允许运动的接触器与工作接触器和过渡接触器接触或分离，从而实现从一个分接头切换到另一个分接头。 永磁变频器有载分接开关结构简单，使用方便，不需要高速机构，通过接触器的直接作用实现变换，高速可靠地工作，并具有 故障率低，使用寿命长。