WO2007078226A1 - Refroidissement de dispositifs haute tension - Google Patents

Refroidissement de dispositifs haute tension Download PDF

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Publication number
WO2007078226A1
WO2007078226A1 PCT/SE2006/000977 SE2006000977W WO2007078226A1 WO 2007078226 A1 WO2007078226 A1 WO 2007078226A1 SE 2006000977 W SE2006000977 W SE 2006000977W WO 2007078226 A1 WO2007078226 A1 WO 2007078226A1
Authority
WO
WIPO (PCT)
Prior art keywords
high voltage
cooling
fluid
bushing
voltage bushing
Prior art date
Application number
PCT/SE2006/000977
Other languages
English (en)
Inventor
Urban ÅSTRÖM
Dan Gustavsson
Fredrik Petrisi
Peter SJÖBERG
Lars Svedjehed
Original Assignee
Abb Technology 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 Abb Technology Ltd. filed Critical Abb Technology Ltd.
Priority to PCT/SE2006/001490 priority Critical patent/WO2007078238A1/fr
Priority to RU2008131323/09A priority patent/RU2399108C2/ru
Priority to EP06835899A priority patent/EP1966807A4/fr
Priority to BRPI0620963-7A priority patent/BRPI0620963A2/pt
Priority to CA002644842A priority patent/CA2644842A1/fr
Priority to US12/159,758 priority patent/US8669469B2/en
Priority to CN2006800492828A priority patent/CN101346779B/zh
Publication of WO2007078226A1 publication Critical patent/WO2007078226A1/fr

Links

Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01B—CABLES; CONDUCTORS; INSULATORS; SELECTION OF MATERIALS FOR THEIR CONDUCTIVE, INSULATING OR DIELECTRIC PROPERTIES
    • H01B17/00—Insulators or insulating bodies characterised by their form
    • H01B17/54—Insulators or insulating bodies characterised by their form having heating or cooling devices

Definitions

  • the present invention relates to the field of electrical power distribution systems and cooling of high voltage devices in such power distribution systems.
  • the invention relates to cooling of bushings utilized within such systems.
  • the invention is also related to a corresponding method.
  • a conventional HVDC (High- Voltage Direct Current) converter valve may be air insulated and water-cooled.
  • a cooling system is conventionally provided comprising for example cooling water distribution pipes that are shaped to fulfill certain requirements .
  • Another example of an external cooling system is the use of fans .
  • Typical voltage levels within electrical power distribution systems range up to about 500 kV DC. However, the voltage levels increases constantly and may amount to as much as 800 kV DC and presumably even higher voltage levels in the future. Also, current levels may be up to 4000-5000 A or even higher. Naturally, such high voltages and current levels result in still higher heat dissipation and the requirements on electrical insulation of a bushing become extremely high. The size of the electrical insulation limits the cooling efficiency of the bushing, since the heat has to be led a longer distance to the ambient cooling air due to its increased size. The self-cooling is thus rendered insufficient at the very high voltage and current levels .
  • a high voltage bushing for transferring high voltage and current from a fluid-cooled HVDC valve.
  • the high voltage bushing comprises an insulating body surrounding an electrical conductor, wherein the electrical conductor is electrically connectable to a connector of the HVDC valve .
  • the electrical conductor of the high voltage bushing is connectable to a cooling system of the HVDC valve.
  • the inventive way of cooling bushings by utilizing already existing and utilized cooling fluid enables a cost- efficient and reliable cooling.
  • the design of a bushing is significantly simplified, as the temperature of the conductor and the insulation material of the bushing is kept under control.
  • the size of the bushings does not increase although utilizing higher currents and voltages.
  • adequate cooling of bushings is accomplished even for high currents and high voltage levels, for example ranging from 500 kv DC up to 800 kV DC and further up to very high voltage levels .
  • the electrical conductor of the high voltage bushing comprises a cooling duct having one or more fluid channels.
  • Such fluid channels could be separate channels in fluid connection with each other in at least one point and arranged to receive circulating cooling fluid on high electric potential from the HVDC valve through the electrical conductor.
  • the high voltage bushing may thus be connected to the fluid cooling system of the HVDC valve by means of the one or more fluid channels .
  • the one or more fluid channels are preferably integrated with the electrical conductor of the high voltage bushing. A size and cost-efficient solution is thereby provided.
  • the electrical conductor comprises an internal fluid pipe, whereby separate channels are provided.
  • the pipe is arranged to lead cooling fluid in one direction within its interior, and the fluid is led back through the channels created between the outside of the fluid pipe and the cooling duct of the electrical conductor. Simple means for circulating the cooling fluid is thereby provided.
  • the electrical conductor is provided with a seal impermeable to fluid at its upper end.
  • the seal is welded onto the end of the electrical conductor. This feature provides an increased security by providing means to prevent the cooling fluid from migrating into the transformer or other sensitive equipment.
  • the cap is preferably welded on its end, a permanent connection is provided that may be pressure tested and enables leak detection, further yet increasing the security and also facilitating fault- localizing.
  • the invention also comprises such method, whereby advantages corresponding to the above are achieved. Further characteristics, advantages and objects of the invention will become apparent when reading the following detailed description.
  • Figure 1 is an overall view of a high voltage bushing.
  • Figure 2 is a cross-sectional view of the bushing of figure 1 assembled to a transformer housing.
  • FIG. 3 illustrates schematically an embodiment of the present invention.
  • Figure 4 illustrates the conductor of figure 3 within a bushing.
  • FIG. 5 illustrates the conductor and the innovative cooling channels more in detail.
  • Figure 6 illustrates a valve hall in which the present invention may advantageously be implemented.
  • a high voltage bushing is a device used to carry current at high potential through a grounded barrier, for example a wall or an enclosure of an electrical apparatus such as a transformer tank.
  • the bushing keeps current from passing into the grounded barrier by virtue of its insulating properties .
  • FIG. 1 A conventional bushing is shown in figures 1 and 2 , wherein the overall structure of a bushing 1 is shown in figure 1.
  • FIG 2 a cross-sectional view of the bushing 1 of figure 1 is shown mounted to a transformer housing 18.
  • a high voltage conductor 10 runs through the center of a hollow bushing insulator 12, which forms a housing around the high voltage conductor 10.
  • the insulator 12 is made of either porcelain or silicone rubber.
  • a condenser core 14 is provided within the insulator housing for voltage grading.
  • the voltage stress on the bushing and its surrounding structure includes both AC and DC components .
  • AC component voltage grading depends on the insulation material permittivities .
  • DC component voltage grading depends on the temperature dependent resistivities of the insulation materials.
  • a flange 16 is provided to connect the housing 12 of the bushing to ground through a transformer housing 18.
  • the connection of the bushing 1 to internal components of a transformer is also indicated schematically in figure 2.
  • the exemplary connection comprises a bottom contact 20 formed by the bottom end portion of the high voltage conductor 10.
  • the bottom contact 20 is provided at the lower, bottom end of the bushing 1 and is arranged to be connected to a mating internal contact 22 provided in the transformer housing 18.
  • an upper outer terminal 24 is provided at the end of the bushing 1 opposite the bottom contact 20 end.
  • the outer terminal 24 is electrically connected to the high voltage conductor 10 through an essentially planar interface and is provided in order to electrically connect the transformer device to external sources . It is realized that any other suitable connection means for connecting the bushing to other electrical apparatuses may be utilized.
  • FIG. 3 illustrates schematically an embodiment of the present invention.
  • the figure illustrates a bushing 30 in accordance with the present invention.
  • the bushing 30 may be a bushing as described above or any other high voltage bushing.
  • a high voltage conductor 31 is housed within the bushing 30.
  • the high voltage conductor 31 of the bushing 30 is provided with one or more channels 32 for conducting cooling fluid, in the present example cooling water, to be described more in detail with reference to figures 4 and 5.
  • HVDC valves are cooled by deionized water circulated in a closed loop system. The heat is transferred to a secondary circuit which may be cooled in outdoor coolers .
  • the present invention may be implemented in connection with a HVDC valve that uses deionized water as cooling medium.
  • a HVDC valve is schematically illustrated and is indicated by reference numeral 34.
  • Water pipes of the cooling system of the HVDC valve 34 are indicated by reference numeral 39.
  • the arrows I and II indicate the direction of the cooling water.
  • the cooling system of the HVDC valve 34 may further comprise a deionizer, a pump, a heat exchanger etc. Such parts of the cooling system are schematically indicated at 40.
  • the cooling fluid of the HVDC valve 34 can be at the same or a different electrical potential as the conductor 31 of the bushing 30.
  • only a fraction of the water used to cool the HVDC valve 34 is used to cool the bushing 30.
  • the fraction of the water could range from 1/5000 up to 1/500, although more or less water may be needed in dependence on the particular application.
  • Figure 4 illustrates the conductor 31 of figure 3 within the bushing 30.
  • Reference numeral 35 indicates a grounded housing, for example a transformer tank or a wall.
  • Reference numeral 36 indicates connection means for connecting the bushing 30 to encapsulated electrical apparatus, such as to internal components of a transformer.
  • Reference numeral 37 indicates the connection to, for example, a high voltage network.
  • the bushing 30 could thus serve for connecting an encapsulated electrical apparatus to a high voltage network, although other applications are conceivable.
  • the innovative water cooling means are shown, and the double- headed arrow in the top part of the bushing 30 indicates flowing cooling water.
  • Figure 5 illustrates the conductor 31 of the high voltage bushing 30 and the innovative cooling ducts in more detail.
  • One or more cooling ducts 32 are provided integrated with the conductor 31.
  • a water pipe 38 is preferably provided within the cooling duct 32. Cooling water may then be led through the water pipe 38, allowing water to enter within the water pipe 38 and led out on the outside of the water pipe 38. That is, the water pipe 38 is arranged to lead cooling water in one direction within the water pipe 38, and the water is then led through channels 32a, 32b created between the outside of the water pipe 38 and the interior of the cooling duct 32.
  • the hollow interior of the conductor 31 housing the cooling duct 32 is preferably not a through hole, thereby reducing the risk of water migrating to electrical devices such as a transformer.
  • the one or more cooling water channels 32a, 32b are connected to the cooling system for cooling the HVDC valves .
  • the temperature of the conductor 31 is approximately kept within the range of 40 0 C to 80 0 C, preferably around 60 0 C. It is realized that the temperature can be supervised and kept at other temperatures as well.
  • the high voltage conductor 31 is provided with a cap welded on its end. Welding provides a permanent connection that may, for example, be pressure tested and enables leak detection.
  • FIG. 6 illustrates a HVDC valve hall, and shows schematically how the present invention could easily be implemented in such application.
  • HVDC converter transformers are connected to the HVDC valve by means of a converter transformer bushing.
  • the converter transformer is arranged directly outside the HVDC valve hall with its bushings penetrating into the valve hall. The top of the bushing is then directly connected to the HVDC valve.
  • Arrow II indicates electrical and cooling water connection.
  • Arrow IV indicates one of several HVDC valves within the valve hall.
  • the inventive way of cooling bushings by utilizing already existing and used cooling water enables a cost-efficient and reliable cooling.
  • the design of a bushing will be significantly simplified, as the temperature of the conductor and the insulation material of the bushing is kept under control.
  • a prior art bushing would have to become very big in order to carry for example 4000 A.
  • the inventive cooling of the bushing gives a lower diameter of the conductor and thereby a reduced size of the whole bushing.
  • the present invention is applicable, for example, for a converter transformer bushing, a valve hall wall bushing and an indoor smoothing reactor bushing.

Landscapes

  • Rectifiers (AREA)
  • Cooling Or The Like Of Electrical Apparatus (AREA)
  • Cooling Or The Like Of Semiconductors Or Solid State Devices (AREA)

Abstract

La présente invention se rapporte au domaine des systèmes de distribution d'énergie électrique et du refroidissement de dispositifs haute tension dans de tels systèmes de distribution d'énergie. L'invention concerne en particulier le refroidissement de traversées employées dans ces systèmes. L'invention a également pour objet un procédé correspondant.
PCT/SE2006/000977 2005-12-30 2006-08-25 Refroidissement de dispositifs haute tension WO2007078226A1 (fr)

Priority Applications (7)

Application Number Priority Date Filing Date Title
PCT/SE2006/001490 WO2007078238A1 (fr) 2005-12-30 2006-12-22 Refroidissement de dispositifs haute tension
RU2008131323/09A RU2399108C2 (ru) 2005-12-30 2006-12-22 Охлаждение высоковольтных устройств
EP06835899A EP1966807A4 (fr) 2005-12-30 2006-12-22 Refroidissement de dispositifs haute tension
BRPI0620963-7A BRPI0620963A2 (pt) 2005-12-30 2006-12-22 resfriamento de dispositivos de alta tensão
CA002644842A CA2644842A1 (fr) 2005-12-30 2006-12-22 Refroidissement de dispositifs haute tension
US12/159,758 US8669469B2 (en) 2005-12-30 2006-12-22 Cooling of high voltage devices
CN2006800492828A CN101346779B (zh) 2005-12-30 2006-12-22 高压设备的冷却

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US75465405P 2005-12-30 2005-12-30
US60/754,654 2005-12-30

Publications (1)

Publication Number Publication Date
WO2007078226A1 true WO2007078226A1 (fr) 2007-07-12

Family

ID=38228492

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/SE2006/000977 WO2007078226A1 (fr) 2005-12-30 2006-08-25 Refroidissement de dispositifs haute tension

Country Status (7)

Country Link
EP (1) EP1966807A4 (fr)
CN (1) CN101346779B (fr)
BR (1) BRPI0620963A2 (fr)
CA (1) CA2644842A1 (fr)
RU (1) RU2399108C2 (fr)
WO (1) WO2007078226A1 (fr)
ZA (1) ZA200805208B (fr)

Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2009003813A1 (fr) * 2007-07-04 2009-01-08 Abb Technology Ltd Refroidissement de dispositifs haute tension
US9968345B2 (en) 1999-09-13 2018-05-15 Rex Medical, L.P. Vascular hole closure device
EP3575725A4 (fr) * 2018-04-09 2020-08-12 State Grid Corporation of China Tige de guidage d'écoulement, carter et système transformateur de convertisseur

Families Citing this family (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101645647B (zh) * 2009-08-24 2012-06-27 中国电力科学研究院 一种基于非能动技术的直流换流阀冷却系统
CN105207146A (zh) * 2015-08-26 2015-12-30 芜湖市凯鑫避雷器有限责任公司 穿墙套管冷却降温装置
CN105119210A (zh) * 2015-08-26 2015-12-02 芜湖市凯鑫避雷器有限责任公司 高压穿墙套管半导体制冷装置
RU203974U1 (ru) * 2020-07-28 2021-04-29 Общество с ограниченной ответственностью "Синтез НПФ" Герметичный корпус высоковольтного устройства, работающего в среде жидкого диэлектрика

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3564386A (en) * 1968-12-27 1971-02-16 Westinghouse Electric Corp Power supply for converting high voltage alternating current into high voltage direct current
WO1998057407A2 (fr) * 1997-06-11 1998-12-17 Abb Ab Dispositif permettant de surveiller un convertisseur haute tension

Family Cites Families (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US1706810A (en) * 1925-09-23 1929-03-26 Gen Electric Electric apparatus
US1983371A (en) * 1934-06-23 1934-12-04 Ohio Brass Co Temperature control for oil filled bushings
US3486064A (en) * 1968-03-20 1969-12-23 Gen Electric Hollow cathode,nonthermionic electron beam source with replaceable liner
US4169965A (en) * 1978-02-21 1979-10-02 General Electric Company Integrally cooled electrical feedthrough bushing
US4358631A (en) * 1980-09-10 1982-11-09 Mitsubishi Denki Kabushiki Kaisha Heat dissipating electrical bushing
CN2365742Y (zh) * 1998-11-19 2000-02-23 永济电机厂 通水电缆
CN1260571A (zh) * 2000-02-02 2000-07-19 赵春宴 内通水式水冷电缆
CN2496115Y (zh) * 2001-06-16 2002-06-19 吴县市宝联机电修造有限公司 直流水冷电缆
CN2586228Y (zh) * 2002-12-16 2003-11-12 宜兴市华宇电炉设备有限责任公司 一种改进的水冷电缆

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3564386A (en) * 1968-12-27 1971-02-16 Westinghouse Electric Corp Power supply for converting high voltage alternating current into high voltage direct current
WO1998057407A2 (fr) * 1997-06-11 1998-12-17 Abb Ab Dispositif permettant de surveiller un convertisseur haute tension

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US9968345B2 (en) 1999-09-13 2018-05-15 Rex Medical, L.P. Vascular hole closure device
WO2009003813A1 (fr) * 2007-07-04 2009-01-08 Abb Technology Ltd Refroidissement de dispositifs haute tension
US7994424B2 (en) 2007-07-04 2011-08-09 Abb Technology Ltd. Cooling of high voltage devices
EP3575725A4 (fr) * 2018-04-09 2020-08-12 State Grid Corporation of China Tige de guidage d'écoulement, carter et système transformateur de convertisseur
US11615908B2 (en) 2018-04-09 2023-03-28 State Grid Corporation Of China Flow-guiding rod, bushing and converter transformer system

Also Published As

Publication number Publication date
CA2644842A1 (fr) 2007-07-12
BRPI0620963A2 (pt) 2011-11-29
RU2399108C2 (ru) 2010-09-10
EP1966807A1 (fr) 2008-09-10
CN101346779A (zh) 2009-01-14
RU2008131323A (ru) 2010-02-10
ZA200805208B (en) 2009-04-29
CN101346779B (zh) 2012-10-24
EP1966807A4 (fr) 2013-01-23

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