EP3711074A1 - Unité de transformateur de puissance transportable - Google Patents

Unité de transformateur de puissance transportable

Info

Publication number
EP3711074A1
EP3711074A1 EP18702118.3A EP18702118A EP3711074A1 EP 3711074 A1 EP3711074 A1 EP 3711074A1 EP 18702118 A EP18702118 A EP 18702118A EP 3711074 A1 EP3711074 A1 EP 3711074A1
Authority
EP
European Patent Office
Prior art keywords
power transformer
boiler
transformer unit
unit according
cooling device
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
EP18702118.3A
Other languages
German (de)
English (en)
Other versions
EP3711074B1 (fr
Inventor
Christian ETTL
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.)
Siemens Energy Global GmbH and Co KG
Original Assignee
Siemens 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 Siemens AG filed Critical Siemens AG
Publication of EP3711074A1 publication Critical patent/EP3711074A1/fr
Application granted granted Critical
Publication of EP3711074B1 publication Critical patent/EP3711074B1/fr
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
    • H01F27/002—Arrangements provided on the transformer facilitating its transport
    • 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
    • H01F27/08—Cooling; Ventilating
    • H01F27/10—Liquid cooling
    • H01F27/12—Oil cooling
    • 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
    • H01F27/02—Casings
    • H01F27/025—Constructional details relating to cooling
    • 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
    • H01F27/24—Magnetic cores
    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/32—Insulating of coils, windings, or parts thereof

Definitions

  • the invention relates to a power transformer unit having at least a single-phase transformer, which is adapted for connection to a high voltage network, each a phasige transformer a filled with an insulating fluid boiler, in which a core is arranged with a high and low voltage winding, at least one bushing plug , Which is connected via a winding cable extending within the boiler with the upper or lower voltage winding, at least one Hochwoods trim guide, which is inserted into the feedthrough socket, a cooling device for cooling the insulating liquid and an expansion vessel, the temperature-compensated volume fluctuations of the Insulating fluid is used.
  • Such a power transformer unit is from the
  • the power transformer unit shown there has three single-phase transformers which are each provided for connection to a high voltage network.
  • Each of the single-phase transformers has a separate boiler in which a core with egg ner upper and one low voltage winding is arranged.
  • a feedthrough bushing is fluid-tightly secured into which a high voltage feedthrough can be inserted.
  • the feedthrough socket protrudes into the oil chamber of the boiler and holds there with the help of an inner wall made of a non-conductive insulating material, a contact part which is connected via a winding connection line with the upper or lower voltage winding.
  • each bushing has an open air connection for connecting an air-insulated high-voltage conductor to its end facing away from the insertion side. tion.
  • a releasably connectable to the boiler cooling device and an expan tion vessel is disclosed, which is also releasably connectable to the boiler.
  • a power transformer unit of modular construction is further known from WO 2017/186749 A1, WO 2017/186750 A2 and WO 2017/186751 A1.
  • the object of the invention is to provide a varnisherein unit of the type mentioned, which can be put on the spot even faster ler ler.
  • the invention solves this problem in that the expan tion vessel and the cooling device are mechanically firmly connected to the boiler and together with this and each
  • Implementation socket form a transport unit, wherein the transport unit has an outer contour, which lies within a predetermined transport profile.
  • a power transformer unit which consists of at least one and usually meh reren single-phase transformers.
  • Each single-phase transformer is designed as a power transformer and provided for connection to a high-voltage network.
  • each single-phase transformer with the exception of the high-voltage feedthroughs a transport unit whose outer contour lies within a pre-written transport profile.
  • a transport profile is given for example by a road transport to be observed traffic order, which is the maximum height, width and length of a vehicle or a vehicle body established.
  • the transport unit according to the invention is within this transport profile and can therefore without Jerusalemwitzi ge planning also transported via conventional roads who the.
  • the only limiting factor is the weight of the transport unit, which can be between 50 and 200 tonnes.
  • the transport unit according to the invention consists at least of the boiler, the expansion vessel and the cooling device of the respective single-phase transformer, wherein the expansion vessel and the cooling device are firmly connected to the boiler.
  • Appropriate connecting lines allow Iso lierfluid from the interior of the boiler via thedeeinrich device can be circulated or can pass as a result of a rise in temperature from the boiler in the expansion vessel.
  • Appropriate lifting points are provided on the boiler, at which a crane can engage to lift the transport unit.
  • the transport unit is, for example, on the trailer of a truck or alternatively on a
  • the transport unit is less than 4.2 m in height, smaller than 3.3 m in width and less than 9 m in length. These dimensions have been found to be particularly expedient to easily meet the existing requirements in the respective countries to a cargo.
  • the transport unit comprises in addition to the said components also at least one motor drive, we least one sensor unit and at least one protection and monitoring device.
  • the said additional components are advantageously fixed to the boiler or even theisserein direction or the expansion vessel, so that they form a solid mechanical bond and thus need not be complex assembled on site.
  • the components are installed so that the maximum height, width and length of the transport unit is within the transport profile.
  • the expansion vessel is designed box-shaped, extending in a longitudinal direction and has a height between 50 cm and 250 cm.
  • the expansion vessel expediently extends above the boiler and parallel to this, the distance to the boiler is kept as low as possible and for example a few centimeters, for example 5 cm - 30 cm, is. If the expansion vessel has, for example, a height of about 20 cm, the boiler can have a height of more than 4 m, without the transport unit projecting beyond the trans port profile.
  • the width of the expansion vessel is smaller than two-thirds of the width of the boiler.
  • the length of the expansion vessel is greater than three-quarters of the length of the Kes sels. According to this further development of the invention, cherstra that the expansion vessel has the necessary internal volume to compensate for the volume fluctuations of the insulating fluid Kings even with larger temperature fluctuations NEN.
  • boiler and expansion vessel each extend in a longitudinal direction, the two longitudinal lines extending parallel to each other.
  • Both expansion vessel and the boiler are box-shaped according to this further development of the invention.
  • the box of the expansion vessel extends above the boiler with the smallest possible distance.
  • the lengths of Kes sel and expansion vessel are advantageously in the same order of magnitude, while the width of the Ausdehnungsge vessel is less than the width of the boiler.
  • the expansion vessel is therefore arranged only above a portion of the lid of the boiler.
  • a section of the boiler is open at the top, in order to arrange the Hochhards notebook material ments there.
  • the boiler on two opposite longitudinal sides and two opposite end faces, which with the
  • the kettle has a box-shaped outer contour that deviates from a cube structure in that two sides of the box facing each other are longer than the other two opposite sides, the shorter sides being referred to herein as end faces.
  • the boiler can be designed according to this development who the that this has a width which is slightly less than that of the transport profile.
  • the length of the boiler is chosen so that it does not exceed the maximum length of the transport profile together with the front side arranged cooling devices.
  • the arrangement of the cooling device at we- at least one of the front sides allows in a particularly simple manner, the transport unit to dimensionie ren ren that this does not exceed the transport profile.
  • the cooling device on two cooling units, which are arranged on different end faces.
  • a cooling unit of the cooling device is arranged on a first end face.
  • the other cooling unit of the cooling device is mounted on the opposite end face of the boiler, wherein both cooling units are connected via an inlet and outlet to the interior of the boiler, so that the insulating fluid can be circulated through the respective cooling unit vice.
  • the circulation can take place passively or actively within the scope of the invention.
  • the cooling device on an inlet and outlet, both of which are arranged below a cooling unit of the cooling device to. According to this advantageous development, it is possible that the expansion vessel can be arranged with only a small distance above the boiler.
  • the bushings are arranged in a lid of the boiler.
  • dome are avoided according to this advantageous development.
  • dome increase the internal volume of the boiler and therefore simplify the inclusion of a passage.
  • such a dome would not allow to arrange the expansion vessel with a small distance to the lid of the boiler.
  • the windings have an aramid insulation.
  • Aramid is an insulating material associated with a high thermal grade and capable of providing the necessary dielectric strength even at high temperatures of the insulating fluid within the boiler.
  • aramid insulation serves to hold the winding conductors of the winding at a fixed distance from one another.
  • An aramid insulation can also serve for the voltage-resistant routing of connecting cables.
  • aramid insulation or another insulating material of this thermal class which can likewise be used instead of aramid insulation, is known to the person skilled in the art, so that further explanations for this can be dispensed with.
  • the insulating fluid is an ester oil.
  • Ester oils have the advantage over mineral oils that they are environmentally friendly.
  • transformers whose boilers are filled with ester oil can be operated at higher temperatures than would be the case with a comparable transformer with mineral oil filling.
  • the trans port unit can therefore be made even more compact.
  • Figure 1 shows an embodiment of a single-phase
  • FIG. 2 shows the single-phase transformer according to FIG. 1 in a side view
  • FIG. 3 shows the single-phase transformer according to FIG. 2 in a plan view
  • Figure 4 shows the transport unit of a single-phase transformer according to Figure 1 with transport profile and Figure 5 illustrate the transport unit according to Figure 4 in a plan view.
  • Figure 1 shows an embodiment of a single-phase
  • Transformers 1 a procedureforransfor- matorhim invention, which in addition to the single-phase transformer 1 shown in Figure 1 has two further identically configured single-phase power transformers 1.
  • Each monophasic transformer 1 is used to connect a phase of a three-phase AC voltage supply network, which is here at a high voltage potential of 335 kV.
  • the single-phase transformer 1 shown in Figure 1 has a boiler 2, which has a viewer facing Be tenwand 3 and an end face 4, which is the viewer ter also facing.
  • the side wall 3 is a correspondingly dimensioned not visible in Figure 1 sides wall 5 opposite, whereas the front side 4 a corre sponding dimensioned end face 6 is opposite.
  • the boiler 2 has a cover 7, which closes fluid-tight at the top.
  • the bottom wall of the boiler 2 is not shown figuratively in FIG.
  • the single-phase transformer 1 further comprises adeein direction, which consists of two cooling units 8 and 9, wherein the cooling unit 8 is connected to the front side 4 and the cooling unit 9 on the front side 6 fixed to the boiler 2.
  • Each cooling unit 8 and 9, respectively, is equipped with fans 10 which, if required, generate an air flow for increasing the cooling power of the respective cooling unit 8, 9.
  • Each cooling unit 8, 9 is connected via an inlet 11 and a drain 12 to the interior of the boiler 2, which is filled with an insulating fluid - here an ester oil. It can be seen that both inlet 11 and outlet 12 un below the respective cooling unit 8 or 9 open into this.
  • a surge tank 13 Above the boiler 2 extends a surge tank 13, which is also connected via a connecting line 14 to the inner space of the boiler 2.
  • the expansion vessel 13 he stretches, as the boiler 2, in a longitudinal direction, wherein the longitudinal direction of the expansion vessel 13 and the longitudinal direction of the boiler 2 are parallel to each other.
  • the expansion vessel 13 is substantially box-shaped and in particular flat, and has a height of about 1 m, wherein the distance between the lid 7 and the bottom surface of the Ausdehnungsge vessel 13, not shown figuratively, is about 10 cm. It is essential that the inlet opening of the inlet 11 is arranged below the inlet mouth of the connecting line 14, so that it is ensured that the level of the insulating liquid in the boiler 2 is always above the inlet opening of the inlet 11.
  • bushings 15 are arranged, which are fluid-tightly connected to the boiler 2.
  • Each through bushing socket 15 forms a mounting flange, against which it is pressed firmly on the cover 7 of the boiler 2 GE.
  • appropriate screw connections serve.
  • figuratively illustrated sealing means are required, which are clamped between the De ckel 7 and the mounting flange.
  • Bushing socket 15 also has aconsab-section, which is not shown figuratively and is made of egg nem electrically non-conductive insulating material be.
  • the receiving portion tapers to a ge closed end.
  • Kon contact part At its projecting into the inner space of the boiler 2 section Kon contact part is connected to a winding connection line extending within the boiler 2 to a winding which is arranged in the boiler. Said winding is inductively coupled via a magnetizable core with another Wick development.
  • a high voltage feedthrough 16, 17, 18 is introduced in Figure 1 respectively. These each have an insertion-side insertion, the complementary shape to said receiving portion of the
  • Feedthrough socket 15 is formed so that it comes to a precise fit of the two components together and air or other inclusions are avoided.
  • each high-voltage feedthrough 16, 17, 18 is equipped with an outdoor connection 19.
  • the single-phase transformer 1 has two cable outputs 20, which are adapted to receive a cable connector.
  • the cable outputs 20 are redundant, so that in case of failure of a cable output 20, the power supply of the transformer 1 downstream consumers is ensured by the still intact cable exit 20.
  • the transformer 1 with three high-voltage bushings 16, 17 and 18 is shown.
  • the high-voltage lead-through 16 is used to connect an air-insulated phase conductor of a high-voltage power supply network with a voltage of 335 kV.
  • the single-phase transformer 1 can now be set so that it outputs the output voltage across the high-voltage bushing 17 or 18, the output voltage from, for example, 138 kV or 134 kV. It is understood that in this case le diglich an output-side high-voltage bushing 17 or 18 is required and the other Hochschreibs pleat tion does not have to be plugged into the associated feedthrough socket 15.
  • a device box 21 and a control unit 22 can be seen in addition to the cooling unit 8, which are both sides of the cooling unit 8 attached to the boiler 2.
  • the cooling unit 8 which are both sides of the cooling unit 8 attached to the boiler 2.
  • a bulge 23 which serves to accommodate the imple mentation socket 15 for the high-voltage bushing 16. Laterally offset next to the bulge 23, the cooling unit 9 can be seen.
  • FIG. 2 shows the single-phase transformer 1 according to FIG. 1 in a side view, in which the bulge 23 covers somewhat the cooling unit 8 arranged behind it, so that only the fans 10 can be seen.
  • the expansion vessel 13 is offset from the boiler 2 to the left and protrudes beyond the lid 7 of the boiler 2 and projects beyond the inlet 11 of the cooling unit 8, extending from its top of the boiler 2 arranged inlet opening under the device box 21 through the inlet opening of the cooling unit 8 extends.
  • Figure 3 shows the single-phase transformer 1 in a plan view, from which in particular the connecting line 14 is clearly visible.
  • the expansion vessel 13 has a vent line 24 equipped with an air dryer to allow the supply of dry air to the expansion vessel 13 at its end remote from the expansion vessel 13.
  • FIG. 4 shows a transport unit 25 of the single-phase transformer 1 according to FIGS. 1, 2 or 3, which comprises all components of the single-phase transformer 1, with the exception of the high-voltage feedthrough 16, 17 and 18.
  • a transport profile 26 is clarified, which should clarify the ma ximal allowable size of cargo in traffic ver. It can be seen that the transport unit 25 does not exceed the maximum permissible transport profile 26. This is achieved on the one hand by the fact that all compo- nents - with the exception of the bushings 16, 17, 18 - are installed on the end faces 4 or 6.
  • the expansion vessel 13 is formed flat, wherein the accesses, so both the input and the output to the respective cooling units 8 and 9 below the respective cooling unit 8 and 9 are arranged.
  • FIG. 5 shows the transport unit 24 and the associated transport profile 25 in an end view. Again, it is recognizable that the transport unit 25 is within the transport port profile 26 and thus allowed to be admitted for road transport.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Transformer Cooling (AREA)

Abstract

L'invention concerne une unité de transformateur de puissance pourvue d'au moins un transformateur monophasé (1) qui sert à la connexion à un réseau à haute tension, chaque transformateur monophasé (1) comportant une cuve (2) remplie d'un fluide isolant dans laquelle est agencé un noyau pourvu d'un enroulement à haute tension et d'un enroulement à basse tension, au moins une douille de connexion traversante (15) qui est connectée à l'enroulement à haute tension ou à l'enroulement à basse tension par un câble de connexion d'enroulement s'étendant à l'intérieur de la cuve, au moins un isolateur de traversée à haute tension (16, 17, 18) qui peut être inséré dans la douille de connexion traversante (15), un équipement réfrigérant (8, 9) destiné à refroidir le liquide isolant et un réservoir d'expansion (13) qui sert à l'équilibrage des variations de volume liées à la température du fluide isolant. Afin de transporter cette unité de transformateur de puissance aussi vite que possible et de pouvoir la prendre sur site en fonctionnement, selon l'invention, le réservoir d'expansion (13) et l'équipement de refroidissement (8, 9) sont connectés mécaniquement et solidement à la cuve (2) et constituent avec elle et chaque douille de connexion traversante (15) une unité de transport (25), l'unité de transport (25) comportant un contour extérieur qui se trouve à l'intérieur d'un profilé de transport (26) prédéfini.
EP18702118.3A 2018-01-15 2018-01-15 Unité de transformateur de puissance transportable Active EP3711074B1 (fr)

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/EP2018/050859 WO2019137623A1 (fr) 2018-01-15 2018-01-15 Unité de transformateur de puissance transportable

Publications (2)

Publication Number Publication Date
EP3711074A1 true EP3711074A1 (fr) 2020-09-23
EP3711074B1 EP3711074B1 (fr) 2022-03-30

Family

ID=61094431

Family Applications (1)

Application Number Title Priority Date Filing Date
EP18702118.3A Active EP3711074B1 (fr) 2018-01-15 2018-01-15 Unité de transformateur de puissance transportable

Country Status (4)

Country Link
US (1) US20200343033A1 (fr)
EP (1) EP3711074B1 (fr)
DK (1) DK3711074T3 (fr)
WO (1) WO2019137623A1 (fr)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN112821722B (zh) 2019-10-31 2022-07-19 台达电子企业管理（上海）有限公司 功率变换系统
CN112751473B (zh) * 2019-10-31 2021-11-05 台达电子企业管理（上海）有限公司 功率模块
CN112750607A (zh) 2019-10-31 2021-05-04 台达电子企业管理（上海）有限公司 变压器及具有其的功率模块

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Also Published As

Publication number Publication date
US20200343033A1 (en) 2020-10-29
WO2019137623A1 (fr) 2019-07-18
EP3711074B1 (fr) 2022-03-30
DK3711074T3 (da) 2022-06-07

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