FR2704107A1 - Electric transformer station. - Google Patents

Abstract

The electrical transformer station comprises an enclosure (2) with walls (3) in which a transformer (4) and related equipment (5, 6) are housed. The heat produced by the transformer is discharged by a fan (7) establishing an air circulation along the walls (3) and a cooling circuit (11) comprising a radiator (12) near the transformer and a coil (15) embedded in the wall (3) ensuring efficient heat dissipation. The heat produced can also be used by external equipment (20). This arrangement allows independent cooling of the station by avoiding the problems associated with filtering air, humidity and water inlets.

Description

-1-

  ELECTRICAL TRANSFORMATION STATION

  The present invention relates to an electrical transformer station comprising an enclosure at least partially buried in which is housed a transformer. There are currently a large number of transformer stations in the form of booths. Large size above-ground cabins are known, in particular, which are less and less used because their size raises opposition from owners and neighbors. For this and other reasons, buried or at least partially buried stations have been created. The transformers contained in these stations produce considerable heat which must be dissipated.15 In the stations currently known, an attempt has been made to solve this problem by equipping the stations with means

  ventilation using outside air. This solution requires expensive air filtration devices; furthermore, the exchange of air with the outside causes humidity problems 20 inside the station and dangers of water entry in the event of heavy rain or floods.

  To remedy these drawbacks, the invention is remarkable in that it comprises at least one member

  entrainment (7) of the air contained in the enclosure25 capable of creating an air circulation running along the walls of the enclosure (2).

  This results in an autonomous cooling station avoiding the problems of humidity and water entry, while reducing costs since it is not necessary to

  provide air filtration devices.

  According to a preferred embodiment, the station comprises a cooling circuit having a contained fluid.

  -2- naked in this circuit intended to dissipate the heat produced by the transformer, the circuit comprising first

  elements arranged near the transformer and intended

  born to recover the heat produced by the latter.

  This arrangement reinforces the evacuation of

  heat produced by the transformer.

  Advantageously, said circuit comprises second elements arranged in or near at least one of the walls of the enclosure and intended to cool the fluid

contained in the circuit.

  By these second elements, for example in the form of

  coils housed in the wall of the enclosure, preferably

  near its outer surface, an evacuation still

  more efficient heat is obtained.

  According to a variant, the circuit comprises at least one conduit intended to bring the heated fluid into said

  first elements towards at least one external equipment.

  This arrangement allows partial or complete use of the heat produced by the transformer in

  outdoor equipment, such as heat pumps

  their or other means of heating.

  Other advantages emerge from the characteristics

  expressed in the dependent claims and the

  description setting out the invention below in more detail

  using a drawing representing schematically, and

  as an example, an embodiment.

  The single figure is a sectional view of such

transformer station.

  The transformer station illustrated in this figure

  single comprises a buried cabin 1 having a

-3-

  girdle 2 with walls 3 of concrete, reinforced concrete, masonry-

  rie, or any other suitable material, and a roof in the form of a slab 3a. This enclosure 2 is intended to receive the transformer 4 and the associated electrical equipment 5,6 such as for example an average equipment

  voltage and a low voltage switchboard.

  In operation, the transformer 4 produces considerable heat which must be removed. The station includes, for this purpose, a fan 7 driven by a motor 8 which makes it possible to establish a circulation of the air contained in the enclosure 2 running along the walls 3 of this

  enclosure 2 o the heat is evacuated by thermal conduction

  mique outwards, for example the earth located around 10. The fan 7 is advantageously located near

  of transformer 4. To improve heat evacuation

  mique, the station is also equipped with a circuit

  cooling 11 with water or any other cooling fluid

  adequate smoothing. The water is heated in a radiator 12 located near the transformer 4 and then brought by the conduit 14 to a coil 15 housed in one or more

  several of the walls 3 of the enclosure 2 where it is cooled

  die to return through line 16 to radiator 12.

  We can also plan to bring all or part of

  tie cooling water to external equipment

  20, such as a heat pump, so as to use

  use the heat recovered for heating buildings, for example. The cooling circuit 11 is provided, at

  This effect, of a three-way valve 18 allowing to de-

  drain all or part of the cooling water to

  the conduit 19 leading to said external equipment.

-4-

  It goes without saying that a complementary duct not il-

  gloss will then be provided to conduct the water back to the circuit.

cooked 11.

  It is understood that the embodiment described above can receive any modification within the framework

  as defined by the claims. So instead

  to be fully buried, the station can only be partially buried. When it is desired to use a maximum of heat produced in an external equipment, such as a heat pump, the walls of enclosure 2 of the station can be thermally insulated in order to

reduce heat loss.

  The fan 7 may be replaced by any other blowing machine or any other drive member for

the air contained in enclosure 1.

  Likewise the air circulation inside the

  this wall can be guided by deflector or guide members. The radiator 12 and the coil 15 may be replaced by any other element intended to recover the heat produced by the transformer, respectively intended to cool the liquid contained in the circuit.

cooling 11.

-

Claims (9)

  1. Electrical transformer station including a   at least partially buried enclosure (2) in which a transformer (4) is housed, characterized in that it comprises at least one drive member (7) for the air contained in the enclosure capable of creating a circulation   tion of air along the walls of the enclosure (2).   2. Station according to claim 1, characterized in that   that said drive member (7) is disposed proximi transformer tee (4).   3. Station according to claim 1 or 2, characterized in that it comprises a cooling circuit (11) containing a fluid intended for removing the heat produced   by the transformer, the circuit (11) comprising pre-   miers elements (12) arranged near the transformer (4) and intended to recover the heat produced by the latter. 4. Station according to claim 3, characterized in that said circuit (11) comprises second elements (15) arranged in or near at least one of the walls (3)   of the enclosure (2) and intended to cool the fluid contained naked in the circuit (11).   5. Station according to claim 3, characterized in that said first elements are constituted by a radiator (12) and said second elements are constituted by a coil (15) embedded in at least one of the walls (3) of the enclosure (2).   6. Station according to claim 3, characterized in that the circuit (11) comprises at least one conduit (19) intended to bring the heated fluid into said first elements   (12) to at least one external equipment (20).   7. Station according to claim 6, characterized in that said external equipment (20) comprises equipment for   heating, such as heat pump.   8. Station according to claims 4 and 6, characterized in   that the circuit (11) comprises a three-way valve (18) capable of directing the fluid coming from said first elements (12) towards said second elements (15) and / or towards said conduit (19).   9. Station according to claim 6, characterized in that   the walls (3) of the enclosure (2) are thermally insulated.