EP2567388A1 - Eletkrische hoch- oder mittelspannungsvorrichtung mit einem aktiven tauchinduktionsteil mit vermindertem rauschen - Google Patents

Eletkrische hoch- oder mittelspannungsvorrichtung mit einem aktiven tauchinduktionsteil mit vermindertem rauschen

Info

Publication number
EP2567388A1
EP2567388A1 EP11716599A EP11716599A EP2567388A1 EP 2567388 A1 EP2567388 A1 EP 2567388A1 EP 11716599 A EP11716599 A EP 11716599A EP 11716599 A EP11716599 A EP 11716599A EP 2567388 A1 EP2567388 A1 EP 2567388A1
Authority
EP
European Patent Office
Prior art keywords
waves
structural elements
propagated
electrical apparatus
tank
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
EP11716599A
Other languages
English (en)
French (fr)
Other versions
EP2567388B1 (de
Inventor
François Devaux
Pascal Vouagner
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
General Electric Technology GmbH
Original Assignee
Alstom Technology AG
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Alstom Technology AG filed Critical Alstom Technology AG
Publication of EP2567388A1 publication Critical patent/EP2567388A1/de
Application granted granted Critical
Publication of EP2567388B1 publication Critical patent/EP2567388B1/de
Active legal-status Critical Current
Anticipated expiration legal-status Critical

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F27/00—Details of transformers or inductances, in general
    • H01F27/33—Arrangements for noise damping

Definitions

  • the invention relates to a high or medium voltage electrical apparatus, such as a transformer or inductance coil, comprising an induction active part immersed in a dielectric fluid.
  • the invention relates to reducing the emission noise of such electrical equipment.
  • the apparatus particularly targeted by the invention are transformers, particularly those of power and distribution in an electrical distribution network, and the inductance coils.
  • an object of the invention is to propose an effective reduction solution from the noise of a high or medium voltage electrical equipment due to the acoustic waves emitted by the active part by induction and propagated by the medium. dielectric fluid surrounding said active portion.
  • a particular object of the invention is to propose a solution compatible with the technological and economic requirements of the field of transmission and distribution of electricity at high or medium voltage.
  • the subject of the invention is a high or medium voltage electrical apparatus comprising an active part by induction, a vessel surrounding the active part and filled with a dielectric fluid, such as oil, and means for acoustic reduction of the waves coming from the active part and propagated in the dielectric fluid.
  • a dielectric fluid such as oil
  • the acoustic reduction means is adapted to divide the propagated waves into two opposing phase wave groups in interference with one another.
  • the passive acoustic reduction means are hollow structural elements, which are impervious to the dielectric fluid, arranged at regular intervals and forming a barrier at a distance from the walls of the tank, the space between two adjacent structural elements being adapted to let some of the waves from the active part and propagated in the fluid without introducing phase shift thus constituting one of the two groups of waves, each structural element being adapted to be excited by one of its so-called internal faces by the other part of the waves coming from the part active and propagated in the fluid and reissue by its so-called external face the other group of waves in phase opposition with the first group of waves and thus create the interference between the two groups of waves, in a zone to distance from the walls of the tank so as to at least limit their amplitude before contact with the latter.
  • active part by induction means electromagnetic induction elements, such as an electromagnetic circuit and windings in HV or MV transformers or in inductance coils.
  • the passive acoustic reduction means according to the invention are advantageous because of their simplicity of implementation and a reduced cost of implementation.
  • an acoustic barrier is formed and an interferential field is created behind it, that is to say in the zone situated between the acoustic barrier and the walls of the tank, limiting the acoustic effect resulting from the mechanical excitation of the walls of the tank containing the dielectric fluid by the acoustic waves.
  • the incident sound pressure waves generated by the components of the part active by induction and reaching the acoustic barrier formed by the structural elements according to the invention are divided into two groups of waves including:
  • the minimization of the resulting effect on the walls of the tank is then obtained by a compensation mechanism between two virtual sources, the first (Q +) linked to the incident wave and crossing the barrier, and the second (Q-) linked to the incident wave exciting the structural elements of the barrier and reemitted with an opposite phase by these structural elements.
  • the compensation mechanism according to the invention obtained by the structural elements constituting the barrier is represented in FIG.
  • the invention essentially consists in producing, within an electrical equipment tank filled with dielectric fluid, a noise attenuator by incident wave division and phase opposition between these divided waves.
  • the noise attenuator according to the invention is passive, that is to say that it does not require the use of any active electrical and / or mechanical means to achieve the field of interference in opposition to phase.
  • the structural elements comprise metal tubes with a constant inner section over their height, each tube being closed at each of its ends by a dielectric fluid-tight device.
  • the structural elements are preferably mounted in the vessel via vibratory decoupling means. This results in a significant reduction of low frequency noise, related to the transfer of acoustic energy by the dielectric fluid.
  • the fixing through the vibratory decoupling means is made to a frame rigid arranged in the tank.
  • the surface of the structural elements is at least equal to two thirds of the surface of the barrier.
  • the invention also relates to an electrical apparatus described above which constitutes a transformer or an inductance coil.
  • the pitch of the acoustic barrier that is to say the distance between two adjacent structural elements, which in a way fixes the distribution between the respective contributions of the incident wave and the wave re-emitted behind the barrier.
  • the pitch must be such that it allows the structural elements to represent a coverage of at least 2/3 of the total surface of the barrier,
  • FIG. 1 is a partial perspective view of a transformer according to the invention
  • FIG. 2 is a partial perspective view of an acoustic barrier according to an embodiment of the invention arranged inside the vessel of the transformer according to FIG. 1;
  • FIG. 3 schematically shows the operation of an acoustic barrier according to the invention
  • FIGS. 4 and 5 show a cross-sectional perspective view of a structural element of the acoustic barrier respectively according to a first and second variant embodiment
  • FIGS. 6A and 6B show in perspective the mounting of a structural element of the acoustic barrier respectively according to a first and second variant embodiment
  • FIG. 7 is a partial perspective view of an acoustic barrier according to another embodiment of the invention.
  • FIG. 8 is a curve representative of the effectiveness of an acoustic barrier according to the invention.
  • FIG. 1 shows a transformer 1 in which an acoustic barrier 2 according to the invention is arranged at a distance from the vertical walls 30A and from the top 30B of the vessel 3.
  • the transformer 1 comprises an active part by induction 4 immersed in dielectric oil (not shown) filling the tank 3.
  • the acoustic barrier 2 is of the passive type and consists of dielectric oil-tight hollow metal tubes 20 arranged in regular spacing between them. More exactly, a regular step separates two tubes 20 spaced apart from the same wall, a distance p2 separates two tubes 20 adjacent to the wedge between two vertical walls 30 and a distance p3 separates two adjacent tubes 20 between one of the vertical walls 30A. and a top wall 30B.
  • the hollow tubes 20 shown in FIG. 2 are of substantially rectangular cross-section. This substantially rectangular shape allows a good relaxation of the hollow tubes 20 and thus a good attenuation of low frequency noise.
  • the regular pitches thus define a space between two tubes 20 adapted to pass part of the pressure waves coming from the active part by induction 4 and propagated in the oil without introducing a phase shift thus constituting a group of wave.
  • Each hollow tube 20 is adapted to be excited by its inner face 200, that is to say the one opposite the active part 4, by the other part of the waves coming from the active part and propagated in oil and reissue another group of waves in phase opposition.
  • an interference field is created between these two groups of waves.
  • FIG. 3 illustrates the creation of an interference field by the phase inversion between the wave portion 01 coming from the incident waves and passing through the barrier 2 and the part 02 reemitted by each of the hollow tubes 20: it occurs thus a compensation between the two sources Q +, Q- of created virtual waves.
  • the dimensions of the hollow tubes 20 and the value of the regular spacing pitches are preferably adapted so that the barrier 2 has a total coverage of the periphery of the active part by induction 4 at the distance D from the vertical walls 30A and from the top 30B .
  • the hollow tubes 20 according to the invention which are impervious to dielectric oil, may be filled either with a light fluid (gas) or with a flexible material (foam or elastomer).
  • FIGS. 4 and 5 Two variants of hollow tubes with a rectangular section are shown in FIGS. 4 and 5: the rectangular hollow tube 20 of FIG. 4 is a welded folded tube whose sealing is achieved by two welded plates 21, 22 and which is filled with a gas,
  • the hollow tube 20 of rectangular section of Figure 5 are extruded tubes whose sealing is achieved by two devices 21, 22 forming fastening flanges for all the tubes and which are filled with a gas.
  • FIGS. 6A and 6B Two alternative embodiments of assembly by means of vibratory decoupling means are shown in FIGS. 6A and 6B:
  • the hollow tubes 20 of FIG. 6A are fixed by means of studs 50 to a rigid frame
  • FIG. 7 Another embodiment of the acoustic barrier 2 according to the invention is shown in FIG. 7: the hollow tubes 20 are here cylindrical and fixed on rails 7 by means of hooks 52 made of compressible material making it possible to perform the vibratory decoupling between tubes 20 and rails 7.
  • the curve represents the acoustic attenuation of the barrier 2 in dB according to the invention as a function of the noise frequencies emitted by the active part by induction 4: it is clearly seen that the acoustic barrier 2 allows an effective attenuation of the noise beyond a frequency of 100 Hz.
  • An acoustic barrier partially surrounding the inside of a HV or MV equipment tank can be envisaged, in particular in the case where the active part by induction emits waves in a preferred direction.
  • an acoustic barrier according to the invention only facing the side faces of the electrical equipment tank.
EP11716599.3A 2010-05-05 2011-05-03 Eletkrische hoch- oder mittelspannungsvorrichtung mit einem aktiven tauchinduktionsteil mit vermindertem rauschen Active EP2567388B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
FR1053509A FR2959859B1 (fr) 2010-05-05 2010-05-05 Appareillage electrique a haute ou moyenne tension comprenant une partie active par induction immergee, a bruit reduit
PCT/EP2011/057062 WO2011138329A1 (fr) 2010-05-05 2011-05-03 Appareillage electrique a haute ou moyenne tension comprenant une partie active par induction immergee, a bruit reduit

Publications (2)

Publication Number Publication Date
EP2567388A1 true EP2567388A1 (de) 2013-03-13
EP2567388B1 EP2567388B1 (de) 2017-07-12

Family

ID=43218506

Family Applications (1)

Application Number Title Priority Date Filing Date
EP11716599.3A Active EP2567388B1 (de) 2010-05-05 2011-05-03 Eletkrische hoch- oder mittelspannungsvorrichtung mit einem aktiven tauchinduktionsteil mit vermindertem rauschen

Country Status (7)

Country Link
US (1) US8841982B2 (de)
EP (1) EP2567388B1 (de)
CN (1) CN102884598A (de)
BR (1) BR112012027557A2 (de)
CA (1) CA2797788A1 (de)
FR (1) FR2959859B1 (de)
WO (1) WO2011138329A1 (de)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9466414B2 (en) * 2015-02-24 2016-10-11 Cooper Technologies Company Vibration stabilizer for enclosure cooling fins

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1846887A (en) * 1930-05-24 1932-02-23 Gen Electric Electrical induction apparatus
US3102246A (en) * 1958-12-17 1963-08-27 Mc Graw Edison Co Noise reducing means for transformer
US3305813A (en) 1961-11-21 1967-02-21 Mc Graw Edison Co Cooling and noise reducing arrangement for stationary induction apparatus
JPS58143510A (ja) * 1982-02-20 1983-08-26 Hitachi Ltd 静止誘導電器
JPS59172218A (ja) 1983-03-18 1984-09-28 Toshiba Corp 静止誘導電器タンク
JPS616812A (ja) 1984-06-21 1986-01-13 Toshiba Corp 静止誘導電器タンク
JPS6490497A (en) * 1987-09-30 1989-04-06 Bridgestone Corp Noise reducer
US5138588A (en) 1988-08-19 1992-08-11 Brunswick Corporation Underwater sound attenuator
US5121811A (en) * 1989-01-27 1992-06-16 Bridgestone Corporation Noise reducing device for printer
DE4228101A1 (de) * 1992-08-27 1994-03-03 Abb Patent Gmbh Minderung der Schallemission von Transformatoren
FR2730335A1 (fr) 1995-02-02 1996-08-09 France Etat Dispositif anti bruit notamment pour accoustique sous-marine
SE514509C2 (sv) * 1999-06-28 2001-03-05 Abb Ab stationär ljudisolerande anordning, stationär induktionsmaskin samt användning av en sådan induktionsmaskin

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
See references of WO2011138329A1 *

Also Published As

Publication number Publication date
EP2567388B1 (de) 2017-07-12
CN102884598A (zh) 2013-01-16
FR2959859B1 (fr) 2013-06-28
US8841982B2 (en) 2014-09-23
US20130043965A1 (en) 2013-02-21
BR112012027557A2 (pt) 2016-08-02
FR2959859A1 (fr) 2011-11-11
CA2797788A1 (fr) 2011-11-10
WO2011138329A1 (fr) 2011-11-10

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