EP4379758A1 - Verfahren und transformatoranordnung zur handhabung des transports und der montage eines einphasentransformators - Google Patents

Verfahren und transformatoranordnung zur handhabung des transports und der montage eines einphasentransformators Download PDF

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Publication number
EP4379758A1
EP4379758A1 EP22210860.7A EP22210860A EP4379758A1 EP 4379758 A1 EP4379758 A1 EP 4379758A1 EP 22210860 A EP22210860 A EP 22210860A EP 4379758 A1 EP4379758 A1 EP 4379758A1
Authority
EP
European Patent Office
Prior art keywords
tanks
single phase
transformer
site
phase transformer
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.)
Pending
Application number
EP22210860.7A
Other languages
English (en)
French (fr)
Inventor
Erik Carl WEDIN
Peter Astrand
Mattias VIKSTEN
Erik LYSELL
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.)
Hitachi Energy Ltd
Original Assignee
Hitachi Energy Ltd
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 Hitachi Energy Ltd filed Critical Hitachi Energy Ltd
Priority to EP22210860.7A priority Critical patent/EP4379758A1/de
Priority to PCT/EP2023/082830 priority patent/WO2024115269A1/en
Publication of EP4379758A1 publication Critical patent/EP4379758A1/de
Pending legal-status Critical Current

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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
    • H01F27/02—Casings
    • 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
    • H01F27/06—Mounting, supporting or suspending transformers, reactors or choke coils not being of the signal type
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
    • H01F30/10—Single-phase transformers

Definitions

  • Embodiments herein relate to the field of transformers.
  • the embodiments herein relate to handling transportation and assembling of a single phase transformer.
  • a power transformer is equipment used in an electric grid of a power system. Power transformers transform voltage and current in order to transport and distribute electric energy. Power transformers are in some cases very large and may not be possible to transport to some locations. Because of this, it is useful if the size of the largest transportable part of the transformer is reduced.
  • transformer is disassembled at a factory and transported to a site in pieces. The transformer is then assembled at the site. This has the disadvantage that it needs, e.g. requires, facilities and resources on site to carry out the assembly. It is also challenging to ensure the quality as it is difficult to perform high voltage testing on site. High voltage testing after assembly on site is normally not carried out with this technology.
  • each transformer requires its own installation on site, including e.g. foundation, fire walls, and electrical connections, including bushings on the transformers. This will drive both cost and footprint for transformers and for the site.
  • a three phase unit is divided into three single phase active parts, each transported to site in a separate tank.
  • the three tanks are located together on the same foundation at site and are normally connected together with leads in oil ducts.
  • the disadvantage of this solution is that it is does not sufficiently reduce the transport size of the single phase tank, which may be too large to transport.
  • the full three phase transformer i.e., three single phase tanks, are normally needed for the spare units.
  • the present disclosure presents an improved viable solution of a method and transformer arrangement.
  • the above-mentioned object is achieved by providing a method performed by a transformer arrangement for handling transportation and assembling of a single phase transformer.
  • the single phase transformer is divided into two or more active parts.
  • the two or more active parts are transported to a site in at least two separate tanks.
  • the single phase transformer is then assembled by connecting the tanks together electrically at the site, wherein the tanks are connected electrically by one or more leads.
  • the tanks may be located on a same foundation at the site.
  • At least two of the tanks may not be separated by fire walls.
  • At least two of the tanks may have different electrical properties.
  • At least one of the tanks may comprise a regulating winding to regulate a voltage and at least one of the tanks does not comprise a regulating winding.
  • At least two of the tanks may be connected in series.
  • At least two of the tanks may be connected in parallel.
  • the tanks may be connected on a primary side of the single phase transformer and/or on secondary sides of the single phase transformer.
  • the tanks may share a same common cooling equipment.
  • At least two of the tanks may be mechanically connected.
  • the mechanical connection may be performed in such a way that allows the at least two tanks to be transported in connected state at the site.
  • At least one of the tanks may comprise a tertiary winding and at least one of the tanks may not comprise a tertiary winding.
  • the object is also achieved by providing a transformer arrangement.
  • the transformer arrangement comprises a single phase transformer and two or more tanks.
  • the transformer arrangement is configured to divide the single phase transformer into two or more active parts and transport the two or more active parts to a site in at least two separate tanks.
  • the transformer arrangement is further configured to assemble the single phase transformer by connecting the tanks together electrically at the site, wherein the tanks are connected electrically by one or more leads.
  • the object is also achieved by providing a single phase transformer.
  • the single phase transformer is configured to be divided into two or more active parts, wherein the two or more active parts are transported to a site in at least two separate tanks.
  • the single phase transformer is further configured to be assembled by connecting the tanks together at the site, and wherein the tanks are connected electrically by one or more leads.
  • Embodiments herein are based on the realisation that by dividing the single phase transformer into at least two active parts which are transported to the site in at least two separate tanks, the transportation size of the single phase transformer is significantly reduced. Furthermore, as the single phase transformer then can be assembled by connecting the tanks together electrically at the site the assembly is handled in a more efficient manner. Thereby the transportation and assembling of a single phase transformer is enhanced.
  • a transformer arrangement 20 is illustrated in Fig. 1 .
  • the transformer arrangement 20 is configured to divide, e.g. separate, a single phase transformer into two or more active parts 14.
  • the active part 14 of the single phase transformer when used herein is the core, the windings, and the electrical insulation between the windings of the single phase transformer.
  • the two active parts 14 may be placed in at least two separate tanks 10, e.g. transformer tanks.
  • the at least two separate tanks 10 are connected electrically by one or more leads and may be mechanically attached together.
  • the two or more active parts 14 are then transported to a site in the at least two separate tanks 10. When at the site, the single phase transformer is assembled by connecting the tanks 10 together electrically.
  • a voltage regulating system is used in the transformer arrangement it may be possible to enable it by using a common On-Load Tap Changer (OLTC) or a common OLTC drive unit.
  • OLTC On-Load Tap Changer
  • a fully assembled spare single phase unit comprising the at least two separate tanks 10 with the active parts 14, installed at the site, may be provided at the site as a backup. Access to a fully assembled spare unit reduces the replacement time in case of a failure in one of the single phase transformers that are in operation.
  • the single phase transformer is first divided into two or more active parts 14. Thereby, certain transportation modes may be enabled. Accordingly, transportation of the single phase transformer can be significantly simplified, leading to reduced costs. Furthermore, in some cases, transport of a full size single phase unit may not be possible at all and measure to reduce the size is necessary.
  • the two or more active parts 14 are then transported to a site in at least two separate tanks 10.
  • the at least two tanks 10 with the active parts 14 may be seen as a unit such as a transportation unit and may be referred to as a single phase unit.
  • the tanks 10 may be transported by one or more vehicles, such as lorries.
  • At least two of the tanks 10 may have different electrical properties. This is advantageous/useful because it may, under certain conditions, allow for a decrease in size of the largest transportable part or it may, under certain conditions, allow for a decrease in total number of active parts and tanks. In some conditions, it may also reduce the cost of the single phase transformers as the active parts 14 can be more specialised. Furthermore, the reliability of the single phase units may be improved because fewer components, for example regulating windings, tertiary windings and/or tap changers, may be required with less overall risk for failures as a consequence.
  • At least two of the tanks 10 may be mechanically connected.
  • the mechanical connection may be performed in such a way that allows the at least two tanks 10 to be transported in connected state at the site, i.e. inside the site.
  • the at least two of the tanks 10 may not be connected during transport to the site, but they may be moved connected within the site.
  • the spare unit can in such case be fully assembled prior to the replacement procedure which will reduce the time to put the spare unit into operation.
  • At least one of the tanks 10 may comprise a regulating winding to regulate a voltage and at least one of the tanks 10 does not comprise a regulating winding.
  • a regulating winding to regulate a voltage
  • at least one of the tanks 10 does not comprise a regulating winding.
  • This is advantageous/useful because it may, under certain conditions, allow for a decrease in size of the largest transportable part or it may, under certain conditions, allow for a decrease in total number of active parts and tanks.
  • the reliability of the single phase units may be improved because fewer components, such as tap changers and regulating windings, are required.
  • the at least one of the tanks 10 that comprises the regulating winding may not be connected to a primary side or secondary side of the transformer.
  • the at least one of the tanks 10 that comprises the regulating winding may be connected to one of the primary side and the secondary side, but not connected to both. According to some embodiments, the at least one of the tanks 10 that comprises the regulating winding may be connected to both the primary side and the secondary side.
  • At least two of the tanks 10 may be connected in series. This is advantageous because it may, under certain conditions, allow for a decrease in size of the largest transportable part or it may, under certain conditions, allow for a decrease in total number of active parts and tanks. Furthermore, the reliability of the single phase units may be improved, and cost may be reduced because some parts may be exposed to a lower voltage level.
  • At least two of the tanks 10 may be connected in parallel. This is advantageous because it allows for less complex design as each part can be made with the same or similar design. Furthermore, in some implementations the reliability can be increased as some of the parallel parts may be operated even with failures on other parallel parts.
  • the at least two of the tanks 10 may be connected both in parallel and in series.
  • the tanks 10 may be connected on a primary side, of the transformer. This is advantageous because it allows for a single connection towards the external primary voltage system, which may reduce overall size and cost of the transformer arrangement 20, including size of transformer tanks 10, transformer foundation and transformer booth. Furthermore it may improve the reliability of the single phase transformer because fewer components, for example bushings, may be required.
  • the tanks 10 may be connected on secondary sides of the transformer. This is advantageous because it allows for a single connection towards the external secondary voltage system, which may reduce overall size and cost of the transformer arrangement 20, including size of transformer tanks 10 and transformer booth. Furthermore it may improve the reliability of the transformer because fewer components, for example bushings, may be required.
  • the tanks 10 may be connected on the primary side and the secondary sides of the transformer. This is advantageous because it allows for a single connection towards the external primary and secondary voltage system, which may reduce overall size and cost of the transformer arrangement, including size of transformer tanks 10 and transformer booth. Furthermore it may improve the reliability of the transformer because few components, for example bushings, is required.
  • the tanks 10 may be connected on the primary side of the single phase transformer and/or on secondary sides of the single phase transformer.
  • At least two of the tanks 10 may comprise a separate cooling equipment and/or at least two of the tanks 10 may comprise a common cooling equipment. According to some embodiments, the tanks 10 may share a same common cooling equipment. This is advantageous because the overall size, cost and complexity of the transformer arrangement, including cooling control and size of the transformer booth may be reduced.
  • At least one of the tanks 10 may comprise a tertiary winding and at least one of the tanks 10 may not comprise a tertiary winding.
  • the tanks 10 may be aligned in a row and a three phase bank may be constructed by aligning the single phase side by side such that the rows are parallel to each other.
  • the tanks 10 are aligned side by side with the long side of the tanks facing each other.
  • At least one of the tanks 10 may comprise a tertiary winding and at least one of the tanks 10 may not comprise the tertiary winding.
  • the single phase transformer is then assembled by connecting the tanks 10 together electrically at the site, wherein the tanks 10 are connected electrically by one or more leads, e.g. in oil or fluid.
  • the tanks 10 may be located, e.g. connected together electrically, on a same foundation at the site. This is advantageous because it reduces the required footprint and cost of civil construction at site. At least two of the tanks 10 may not be separated by fire walls
  • the size and weight of the single phase transformer to be transported e.g. each transport unit, can be significantly reduced.
  • a transformer arrangement 20 is illustrated in Fig. 3 .
  • At least two tanks 10 may be mechanically attached together, are connected electrically in oil by one or more leads, e.g. in oil or fluid ducts, and are transported to the site.
  • At least one of the tanks 10 may comprise a regulating winding to regulate a voltage and at least one of the tanks 10 may not comprise a regulating winding.
  • the at least one of the tanks 10 may comprise the regulating winding to regulate the voltage is marked with an X in Fig. 3 .
  • at least one tank 10 may contain regulation.
  • At least one of the tanks 10 may comprise a tertiary winding to supply power to a separate voltage system and at least one of the tanks 10 may not comprise a tertiary winding.
  • Providing tertiary windings in less than all tanks may reduce the cost because less total number of tertiary windings are required, which may also improve the reliability of the single phase transformer.
  • Fig. 3 shows four tanks 10 connected in parallel, wherein three of the tanks 10 may be connected in parallel as main single phase transformer, and wherein all four tanks 10 may be referred to as a single phase unit.
  • a transformer arrangement 20 is illustrated in Fig. 4 .
  • the figure shows an example with three series connected units, e.g. three series connected tanks 10 comprising the active parts 14 of the single phase transformer. However, it does not necessarily have to be three unit in series, it may be any number from two and above.
  • the three tanks 10 may be connected mechanically and have electrical connection in oil.
  • the series connected units have advancingly lower voltage.
  • the tap changer is located in the unit with the lowest voltage.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Housings And Mounting Of Transformers (AREA)
EP22210860.7A 2022-12-01 2022-12-01 Verfahren und transformatoranordnung zur handhabung des transports und der montage eines einphasentransformators Pending EP4379758A1 (de)

Priority Applications (2)

Application Number Priority Date Filing Date Title
EP22210860.7A EP4379758A1 (de) 2022-12-01 2022-12-01 Verfahren und transformatoranordnung zur handhabung des transports und der montage eines einphasentransformators
PCT/EP2023/082830 WO2024115269A1 (en) 2022-12-01 2023-11-23 Method and transformer arrangement for handling transportation and assembling of a single phase transformer

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
EP22210860.7A EP4379758A1 (de) 2022-12-01 2022-12-01 Verfahren und transformatoranordnung zur handhabung des transports und der montage eines einphasentransformators

Publications (1)

Publication Number Publication Date
EP4379758A1 true EP4379758A1 (de) 2024-06-05

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Application Number Title Priority Date Filing Date
EP22210860.7A Pending EP4379758A1 (de) 2022-12-01 2022-12-01 Verfahren und transformatoranordnung zur handhabung des transports und der montage eines einphasentransformators

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Country Link
EP (1) EP4379758A1 (de)
WO (1) WO2024115269A1 (de)

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS57133609A (en) * 1981-02-12 1982-08-18 Toshiba Corp Split-transportation type transformer
JPS58124215A (ja) * 1982-01-21 1983-07-23 Toshiba Corp 分割型変圧器の組立方法
JPS59210622A (ja) * 1983-05-16 1984-11-29 Toshiba Corp 分割形変圧器
JPS62229909A (ja) * 1986-03-31 1987-10-08 Toshiba Corp 分割形油入電器
JPH06251951A (ja) * 1993-02-25 1994-09-09 Toshiba Corp 単相単巻変圧器
JPH06101410B2 (ja) * 1980-01-21 1994-12-12 株式会社日立製作所 負荷時電圧調整器付単相変圧器
JPH09312216A (ja) * 1996-05-22 1997-12-02 Toshiba Corp 分割形油入電器

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06101410B2 (ja) * 1980-01-21 1994-12-12 株式会社日立製作所 負荷時電圧調整器付単相変圧器
JPS57133609A (en) * 1981-02-12 1982-08-18 Toshiba Corp Split-transportation type transformer
JPS58124215A (ja) * 1982-01-21 1983-07-23 Toshiba Corp 分割型変圧器の組立方法
JPS59210622A (ja) * 1983-05-16 1984-11-29 Toshiba Corp 分割形変圧器
JPS62229909A (ja) * 1986-03-31 1987-10-08 Toshiba Corp 分割形油入電器
JPH06251951A (ja) * 1993-02-25 1994-09-09 Toshiba Corp 単相単巻変圧器
JPH09312216A (ja) * 1996-05-22 1997-12-02 Toshiba Corp 分割形油入電器

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Publication number Publication date
WO2024115269A1 (en) 2024-06-06

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