• 专利附录
  • 专利说明
  • 权利要求
  • 类似技术
  • 同族专利
  • 引用文献
  • 法律状态
  • 优先权
    • 专利摘要:
    A device (100) for suspending a current transformer (2) on a busbar rig (4) in a wind turbine, wherein said device in the orientation intended during use comprises: a first support bar (6) having a first end (8) and a second end (10) and being configured to be connected on top of a first existing bracket (12) in a busbar rig (4) of a wind turbine; a second support bar (14) having a first end (16) and a second end (18) and being configured to be connected on top of a second existing bracket (20) in a busbar rig (4) of a wind turbine; a crossbar (22) having a first end (24) and a second end (26), and being configured to be connected to said first support bar 6 and said second support bar (14) at the second ends (10,18) thereof; one or more elongation elements (28,28’) having a first end (30) and a second end (32) and being configured to be connected to said crossbar at a first end (24) thereof and extending a distancebelow said crossbar; a mounting bracket (34) for a current transformer (2) configured to be arranged at a second end (32) of said one or more elongation elements (28,28’) and being configured to be connected to a current transformer (2). The device enables the securing of a current transformer around a busbar in a wind turbine with the view for performing accurate measurements of the power produced by a wind turbine and being supplied to the grid.
    公开号:DK201800381A1
    申请号:DKP201800381
    申请日:2018-07-12
    公开日:2019-10-16
    发明作者:Kieffer Sørensen Mikael
    申请人:Scada International A/S；
    IPC主号:
    专利说明:

    A device for suspending a current transformer in a wind turbine
    Field of the invention
    The present invention relates in general to the field of wind turbines. More specifically the present invention relates in a first aspect to a device for suspending a current transformer on a busbar rig in a wind turbine. In a second aspect the present invention relates to a system for measuring power supplied to the grid from a wind turbine, wherein said system comprises a device according to the first aspect in combination with a current transformer. In a third aspect, the present invention relates to a busbar rig for a wind turbine, said busbar rig comprises a device according to the first aspect of the present invention, or comprising a system according to the second aspect of the present invention. In a fourth aspect the present invention relates to a use of a device according to the first aspect of the present invention or of a system according to the second aspect of the present invention, or of a busbar rig according to the third aspect of the present invention in performing a measurement of the power generated from a wind turbine and supplied to the grid. In a fifth aspect the present invention relates to a wind turbine comprising a device according to the first aspect of the present invention or comprising a system according to the second aspect of the present invention, or comprising a busbar rig according to the third aspect of the present invention.
    Background of the invention
    Within the field of wind turbines and the operation thereof it is customary that the company responsible for setting up, operating and maintaining a wind turbine is different from the company operating the grid into which electric power generated by the wind turbine is supplied.
    As payment is required from the company operating the grid to the company operating the wind turbine, it is in the interest of the company operating the grid that the payment for power supplied to the grid is based on the magnitude of power actually delivered to the grid and not just based on the magnitude of power produced and measured on the generator or on the transformer of the wind turbine.
    Accordingly, in order to provide for a more accurate measurement of the power actually being supplied to the grid from a wind turbine it has been practice for the latest decades to arrange a current transformer on the busbars arranged between the grid on the one hand and transformer and/or converter on the other hand.
    Preferably, it is customary to arrange such a current transformer on a busbar relating to each of the three phases of the power output of the wind turbine.
    A current transformer simple comprises a coil with one or more windings. The current transformer is placed around a busbar in such a way that current flowing in the busbar will
    DK 2018 00381 A1 induce a current in the coil of the current transformer which in turn can be measured and which will be representative of the magnitude of power supplied to the grid.
    Now, as high voltages are present in the electric installations of the secondary side of a power transformer of a wind turbine electric hazards are involved in case any tampering with these installations are being performed.
    Therefore, severe safety regulations are to be complied with in designing and setting up the busbar suspension rig and once set up, there are strict restrictions regulating which types of modifications and add-ons are allowed in this design.
    Moreover, it is important in relation to the accuracy of the measurement being performed on the current transformer that the busbar is arranged in the center of the current transformer.
    For the reasons given above, arranging a current transformer on the busbar rig of a wind turbine may pose certain challenges, as safety regulations have to be complied with and because accurate measurements performed on the current transformer is desired.
    The present invention in its various aspect seeks to solve these problems.
    Accordingly, it is an objective of the present invention to provide devises and uses which solves these problems.
    Brief description of the invention
    These objectives are fulfilled according to the first, the second, the third, the fourth and the fifth aspect of the present invention.
    Accordingly, the first aspect of the present invention relates to a device for suspending a current transformer on a busbar rig in a wind turbine, wherein said device in the orientation intended during use comprises:
    -a first support bar having a first end and a second end and being configured to be connected on top of a first existing bracket in a busbar rig of a wind turbine;
    - a second support bar having a first end and a second end and being configured to be connected on top of a second existing bracket in a busbar rig of a wind turbine;
    - a crossbar having a first end and a second end, and being configured to be connected to said first support bar and said second support bar at the second ends thereof;
    -one or more elongation elements having a first end and a second end and being configured to be connected to said crossbar at a first end thereof and extending a distance below said crossbar;
    DK 2018 00381 A1
    - a mounting bracket for a current transformer configured to be arranged at a second end of said one or more elongation elements and being configured to be connected to a current transformer.
    In a second aspect the present invention relates to a system for measuring power supplied to the grid from a wind turbine, said system comprises a device according to the first aspect of the present invention in combination with a current transformer, wherein said current transformer is being connected to said mounting bracket of said device.
    In a third aspect the present invention relates to a busbar rig for a wind turbine, said busbar rig comprises a device according to the first aspect of the present invention or a system according to the second aspect of the present invention.
    In a fourth aspect the present invention relates to a use of the device according to first aspect of the present invention or of the system according to the second aspect of the present invention or of a busbar rig according to the third aspect of the present invention in performing a measurement of the power supplied to the grid from a wind turbine.
    In a fifth aspect the present invention relates to a wind turbine comprising a device according to the first aspect of the present invention or comprising a system according to the second aspect of the present invention, or comprising a busbar rig of the third aspect of the present invention.
    The present invention in its various aspects provides for a secure and reliable arrangement of a current transformer in an existing busbar rig in a wind turbine without the necessity of interfering or modifying or tampering with the design of such an existing busbar rig to an extent that violates safety regulations of such a rig, and also in some embodiments provide for allowing adjustment of the current transformer in the tree dimensional space with the view to attain an accurate centering of the busbar in the center of the current transformer.
    Brief description of the figures
    Fig. 1 is a perspective view illustrating a busbar rig in a wind turbine.
    Fig. 2 is a perspective explosive view illustrating the device of the invention and its arrangement with a current transformer.
    Fig. 3 is a perspective view illustrating the system of the invention.
    Detailed description of the invention
    The first aspect of the present invention
    DK 2018 00381 A1
    Accordingly, the first aspect of the present invention relates to a device for suspending a current transformer on a busbar rig in a wind turbine, wherein said device in the orientation intended during use comprises:
    -a first support bar having a first end and a second end and being configured to be connected on top of a first existing bracket in a busbar rig of a wind turbine;
    - a second support bar having a first end and a second end and being configured to be connected on top of a second existing bracket in a busbar rig of a wind turbine;
    - a crossbar having a first end and a second end, and being configured to be connected to said first support bar and said second support bar at the second ends thereof;
    -one or more elongation elements having a first end and a second end and being configured to be connected to said crossbar at a first end thereof and extending a distance below said crossbar;
    - a mounting bracket for a current transformer configured to be arranged at a second end of said one or more elongation elements and being configured to be connected to a current transformer.
    Accordingly, the device according to the first aspect of the present invention comprises a pair of support bars which are to be attached to a busbar rig in a wind turbine. The two support bars are connected to each other via a cross bar from which a pair of elongation elements extend in a downward direction. In a lower portion of the elongation elements a mounting bracket assembly is arranged which in turn is configured for holding a current transformer into place.
    In one embodiment of the device of first aspect of the present invention the first support bar and/or the second support bar independently is/are having a u-shaped cross-section.
    This design of the support bars will make attachment of the device in an existing busbar rig of the type comprising upper U-shaped brackets very easy.
    In one embodiment of the device of first aspect of the present invention the first support bar and/or said second support bar at a first end thereof independently is/are comprising one or more through-going holes for attachment of said support bar to said first existing bracket and/or said second existing bracket in said busbar rig of said wind turbine.
    In one embodiment of this embodiment, the first support bar and/or said second support bar at a second end thereof independently is/are comprising a through-going hole, preferably an elongate through-going hole extending in a direction parallel to a lengthwise direction of said first and/or second support bar for allowing attachment to said cross bar.
    Making the through-going hole in the second end of the first and/or second support bar elongate will allow for adjusting the position of the crossbar, and hence also of the current transformer, in one dimension, relative to the first and second support bars.
    DK 2018 00381 A1
    In one embodiment of the device of first aspect of the present invention, the cross bar at a first end and/or at a second end thereof comprises a through-going hole, preferably an elongate through-going hole extending in a direction parallel to a lengthwise direction of said cross bar.
    Making the through-going hole in the first end and/or at a second end of the bar elongate will allow for adjusting the position of the crossbar, and hence also of the current transformer, in another dimension relative to the first and second support bars.
    In one embodiment of the device of first aspect of the present invention, the cross bar at a middle portion thereof comprises one or more through-going holes for allowing attachment of said one or more elongation elements.
    Hereby it is assured that the elongation elements can be fixed to the cross bar.
    In one embodiment of the device of first aspect of the present invention, the one or more elongation elements at a first end thereof and/or at a second end thereof comprises a tread, either an inner or an outer thread for receiving a nut or a bolt.
    Hereby it is assured that the elongation elements can be fixed to the cross bar. Moreover, the tread in the second end of the elongation elements allows a mounting bracket for a current transformer to be fixed to the elongation elements.
    In one embodiment of the device of first aspect of the present invention the mounting bracket comprises a first, upper element and a second, lower element, wherein said first, upper element and said second, lower elements are being configured for being arranged on top of and below, respectively, of a current transformer, and wherein said one or more elongation elements are being configured for being connected to said first, upper element of said mounting bracket.
    This design of the mounting bracket allows secure fixing of a current transformer to device of the first aspect of the present invention.
    In one embodiment of the device of first aspect of the present invention the device, in respect of one or more, preferably all said elongation elements, further comprises an outer tubing made of a non-ferromagnetic and non-paramagnetic material, such as a polymer, such as POM polymer.
    Hereby the voltage isolation between the busbar and the elongation element is improved which implies higher safety, especially in case the distance between the busbar and the elongation element is relatively small.
    In one embodiment of the device of first aspect of the present invention the cross bar is attached to said first support bar and said support bar, at two opposite ends of said cross bar, such as by being bolted with bolts and nuts.
    DK 2018 00381 A1
    In one embodiment of the device of first aspect of the present invention the one or more elongation elements are being attached to said cross bar, such as by being bolted with bolts and/or nuts.
    In one embodiment of the device of first aspect of the present invention the one or more elongation elements are being attached to said mounting bracket for a current transformer, such as by being bolted with bolts and/or nuts.
    Using bolts and nuts for mounting the various elements of the device to each other provides for a sturdy design of the device.
    In one embodiment of the device of first aspect of the present invention the device further comprises one or more treaded bushings and one or more treaded bolts; wherein said one or more treaded bushings are being configured to be screwed onto a bolt fastening said first existing bracket or said second existing bracket in said busbar rig of said wind turbine.
    Hereby secure fixing of the device to an existing bracket of a bus bar rig in a wind turbine is ensured.
    The second aspect of the present invention
    In a second aspect the present invention relates to a system for measuring power supplied to the grid from a wind turbine, said system comprises a device according to the first aspect of the present invention in combination with a current transformer, wherein said current transformer is being connected to said mounting bracket of said device.
    In one embodiment of the system according to the second aspect of the present invention the system comprises three devices and three current transformers.
    Hereby a secure and accurate fixing of a current transformer on a busbar associated with each of the three phases of a power cable to be connected to the grid is possible.
    The third aspect of the present invention
    In a third aspect the present invention relates to a busbar rig for a wind turbine, said busbar rig comprises a device according to the first aspect of the present invention or a system according to the second aspect of the present invention.
    The fourth aspect of the present invention
    In a fourth aspect the present invention relates to a use of the device according to first aspect of the present invention or of a system according to the second aspect of the present invention
    DK 2018 00381 A1 or of a busbar rig according to the third aspect of the present invention in performing measurements of the power supplied to the grid from a wind turbine.
    The fifth aspect of the present invention
    In a fifth aspect the present invention relates to a wind turbine comprising a device according to the first aspect of the present invention or comprising a system according to the second aspect of the present invention, or comprising a busbar rig according to the third aspect of the present invention.
    Referring now to the drawings for better illustrating the present invention, fig. 1 is a perspective view illustrating a prior art busbar rig of a wind turbine.
    Fig. 1 shows the busbar rig 4 comprising three current conducting beams 58 which are being held together by a first bracket 12 and a second bracket 20 via bolts 56. The current flowing in the current conducting beams 58 originates from power which has been produced in the generator of the wind turbine and which has been directed through a power transformer and optionally also a power converter. The brackets 12, 20 are electrically isolated from the beams 58.
    In order to direct the power produced by the wind turbine into the grid, each individual current conducting beam 58 is connected to an individual busbar 5.
    Accordingly, in respect of each busbar 5, a first end terminal thereof is in electric contact with a specific current conducting beam 58, whereas a second end terminal of the busbar is in electric contact with a specific power cable extending to the ground along the longitudinal direction of the wind turbine tower (not shown in fig. 1).
    Fig. 2 is an exploded view illustrating the components making up a device according to the first aspect of the present invention and its combination with a current transformer in the form of a system according to the second aspect of the present invention.
    Fig. 2 shows that the device 100 for suspending a current transformer comprises a first support bar 6 having a first end 8 and a second end 10; and a second support bar 14 having a first end 16 and a second end 18.
    The first support bar 6 is configured for being arranged on top of a first existing bracket 12 in a busbar rig 4 of a wind turbine. Likewise, the second support bar 14 is configured to be arranged on top of a second existing bracket 20 in the busbar rig 4 of that wind turbine.
    The first support bar 6 and the second support bar 14 are attached to its corresponding bracket 12, 20 via the treaded bushing 52 being connected to the bolts below that bushing in the existing busbar rig, and via bolts being screwed into the busing 52 via through-going hole 36 in a first end of first and second support bars 6,14.
    DK 2018 00381 A1
    In fig. 1 it is seen that the first and the second support bar 6,14 is having a u-shaped crosssection. This geometry will aid in supporting the respective support bar 6,14 on the first and second existing bracket 12,20, respectively, of the busbar rig of the wind turbine.
    On top of the first and second support bars 6,14 is arranged a cross bar 22 at a second end 10,18 of the first and second support bar 6,14, respectively.
    The cross bar 22 is attached to the first and second support bars 6,14 via bolts and nuts as shown.
    Below a middle portion 42 of the cross bar 22 two elongation elements 28,28' extend in a downward direction. The elongation elements 28,28' are at a first end 30 thereof attached to the cross bar 22 via nuts as shown.
    The opposite or second end 32 of the elongation elements 28,28' is attached to a mounting bracket 34 for a current transformer 2.
    The mounting bracket 34 itself comprises a first, upper element 46 and a second, lower element 48. The first, upper element and the second, lower element are being arranged in a configuration where they are arranged on top of and below, respectively, of the current transformer 2, and the elongation elements 28,28' are configured for being connected to the first, upper element 46 of the mounting bracket.
    It is seen in Fig. 2 that the current transformer comprises a central hole 54. In operation, a busbar to be connected to the grid is arranged in the hole 54 of the current transformer.
    Fig. 2 also shows presence of elongate holes 38 in the first support bar 6 and the second support bar 14; and also shows the presence of elongate holes 40 in the cross bar 22.
    Accordingly, the elongate holes 38 and 40 allows for adjusting the position and thus centering the relative location of the busbar, penetrating the hole 54, in relation to the current transformer 2 in mutually perpendicular directions. Hereby, an exact centering of the busbar in the current transformer is possible, and hence an accurate measurement of the power being delivered to the grid may be accomplished.
    It is preferred that each busbar being connected to a grid in a wind turbine, such as three busbars each representing a single phase of power produces, passes a current transformer 2 being suspended in a device 100 according to the present invention.
    The combination of the device 100 illustrated in Fig. 2 with the current transformer 2 makes up the system 200 according to the second aspect of the present invention.
    Fig. 3 is a perspective view illustrating the system of the invention. The system comprises the device 100 for suspending a current transformer 2 in combination with such a current transformer 2.
    Fig. 3 shown that the system 200 comprises a first support bar 6 and a second support bar 8. The first support bar and the second support bar 8 are connected to each other via a cross bar
    DK 2018 00381 A1
    22. From the cross bar, two elongation elements 28,28' extend downwardly to a mounting bracket 34 for a current transformer 2.
    The current transformer 2 is arranged between a first, upper element 46 and a second, lower element 48 of the mounting bracket 34. The two elongation elements 28,28' are being 5 connected to the first, upper element of said mounting bracket 34.
    It is seen in Fig. 3 that the system 200 comprising the device 100 and the current transformer 2 is arranged on top of two brackets 12,20 of an existing busbar rig of a wind turbine and are secured thereto.
    It should be understood that all features and achievements discussed above and in the appended claims in relation to one aspect of the present invention and embodiments thereof apply equally well to the other aspects of the present invention and embodiments thereof.
    DK 2018 00381 A1
    List of reference numerals
    Current transformer
    4Busbar rig in a wind turbine5Busbar6First support bar8First end of first support bar10Second end of first support bar12First existing bracket of busbar rig in wind turbine14Second support bar16First end of second support bar18Second end of second support bar20Second existing bracket of busbar rig in wind turbine22Cross bar24First end of cross bar26Second end of cross bar28,28'Elongation element30First end of elongation element32Second end of elongation element34Mounting bracket for current transformer36Through-going hole in first end of support bar38Through-going hole in second end of support bar40Through-going hole in first/second end of cross bar42Middle portion of cross bar44Through-going hole in middle portion of cross bar46First, upper element of mounting bracket for current transformer48Second, lower element of mounting bracket for current transformer50Outer tubing of elongation element
    DK 2018 00381 A1
    Treaded bushing
    Center hole in current transformer
    Bolt fixing first or second existing bracket of busbar rig
    Current conducting beam of busbar rig
    100 Device according to the invention
    200 System according to the invention
    权利要求:
    Claims (18)
    [1] Claims
    1. A device (100) for suspending a current transformer (2) on a busbar rig (4) in a wind turbine, wherein said device in the orientation intended during use comprises:
    -a first support bar (6) having a first end (8) and a second end (10) and being configured to be connected on top of a first existing bracket (12) in a busbar rig (4) of a wind turbine;
    - a second support bar (14) having a first end (16) and a second end (18) and being configured to be connected on top of a second existing bracket (20) in a busbar rig (4) of a wind turbine;
    - a crossbar (22) having a first end (24) and a second end (26), and being configured to be connected to said first support bar 6 and said second support bar (14) at the second ends (10,18) thereof;
    -one or more elongation elements (28,28') having a first end (30) and a second end (32) and being configured to be connected to said crossbar at a first end (24) thereof and extending a distance below said crossbar;
    - a mounting bracket (34) for a current transformer (2) configured to be arranged at a second end (32) of said one or more elongation elements (28,28') and being configured to be connected to a current transformer (2).
    [2] 2. A device (100) according to claim 1, wherein said first support bar (6) and/or said second support bar (14) independently is/are having a u-shaped cross-section.
    [3] 3. A device (100) according to claim 1 or 2, wherein said first support bar (6) and/or said second support bar (14) at a first end (8,16) thereof independently is/are comprising one or more through-going holes (36) for attachment of said support bar (6,8) to said first existing bracket (12) and/or said second existing bracket (20) in said busbar rig (4) of said wind turbine.
    [4] 4. A device (100) according to any of the preceding claims, wherein said first support bar (6) and/or said second support bar (14) at a second end (10,18) thereof independently is/are comprising a through-going hole (38), preferably an elongate through-going hole extending in a direction parallel to a lengthwise direction of said first and/or second support bar for allowing attachment to said cross bar.
    [5] 5. A device (100) according to any of the preceding claims, wherein said cross bar (22) at a first end (24) and/or at a second end (26) thereof comprises a through-going hole (40), preferably an elongate through-going hole extending in a direction parallel to a lengthwise direction of said cross bar.
    [6] 6. A device (100) according to any of the preceding claims, wherein said cross bar (22) at a middle portion (42) thereof comprises one or more through-going holes (44) for allowing attachment of said one or more elongation elements (28,28').
    DK 2018 00381 A1
    [7] 7. A device (100) according to any of the preceding claims, wherein said one or more elongation elements (28,28') at a first end (30) thereof and/or at a second end (32) thereof comprises a tread, either an inner or an outer thread for receiving a nut or a bolt.
    [8] 8. A device (100) according to any of the preceding claims, wherein said mounting bracket (34) comprises a first, upper element (46) and a second, lower element (48), wherein said first, upper element and said second, lower element are being configured for being arranged on top of and below, respectively, of a current transformer (2), and wherein said one or more elongation elements (28,28') are being configured for being connected to said first, upper element of said mounting bracket.
    [9] 9. A device (100) according to any of the preceding claims further comprising, in respect of one or more, preferably all of said elongation elements (28,28'), an outer tubing (50) made of a non-ferromagnetic and non-paramagnetic material, such as a polymer, such as POM polymer.
    [10] 10. A device (100) according to any of the preceding claims, wherein said cross bar (22) is attached to said first support bar (6) and said support bar (14), at two opposite ends (24,26) of said cross bar, such as by being bolted with bolts and nuts.
    [11] 11. A device (100) according to any of the preceding claims, wherein said one or more elongation elements (28,28') are being attached to said cross bar (22), such as by being bolted with bolts and/or nuts.
    [12] 12. A device (100) according to any of the preceding claims, wherein said one or more elongation elements (28,28') are being attached to said mounting bracket (34) for a current transformer (2), such as by being bolted with bolts and/or nuts.
    [13] 13. A device (100) according to any of the preceding claims further comprising on or more treaded bushings (52) and one or more treaded bolts; wherein said one or more treaded bushings are being configured to be screwed onto a bolt fastening said first existing bracket (12) or said second existing bracket (20) in said busbar rig (4) of said wind turbine.
    [14] 14. A system (200) for measuring power supplied to the grid from a wind turbine, said system comprises one or more devices (100) according to any of the preceding claims in combination with on or more current transformers (2), wherein each said current transformer is being connected to a corresponding mounting bracket (34) of a device (100).
    [15] 15. A system 200 according to claim 14 comprising three devices 100 and three current transformers 2.
    [16] 16. A busbar rig for a wind turbine, said busbar rig comprises a device (100) according to any of the claims 1 - 13 or of a system (200) according to claim 14 or 15.
    DK 2018 00381 A1
    [17] 17. Use of a device (100) according to any of the claims 1 - 13 or of a system (200) according to claim 14 or 15, or of a busbar rig according to claim 16 in performing a measurement of the power supplied to the grid from a wind turbine.
    [18] 18. A wind turbine comprising a device (100) according to any of the claims 1 - 13 or
    5 comprising a system (200) according to claim 14 or 15; or comprising a busbar rig according to claim 16.
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    同族专利:
    公开号 | 公开日
    DK179943B1|2019-10-16|
    引用文献:
    公开号 | 申请日 | 公开日 | 申请人 | 专利标题
    法律状态:
    2019-10-16| PAT| Application published|Effective date: 20191016 |
    2019-10-16| PME| Patent granted|Effective date: 20191016 |
    优先权:
    申请号 | 申请日 | 专利标题
    DKPA201800381A|DK179943B1|2018-07-12|2018-07-12|A device for suspending a current transformer in a wind turbine|DKPA201800381A| DK179943B1|2018-07-12|2018-07-12|A device for suspending a current transformer in a wind turbine|
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