EP3378072A1 - Transformer with temperature-dependent cooling function - Google Patents
Transformer with temperature-dependent cooling functionInfo
- Publication number
- EP3378072A1 EP3378072A1 EP17700953.7A EP17700953A EP3378072A1 EP 3378072 A1 EP3378072 A1 EP 3378072A1 EP 17700953 A EP17700953 A EP 17700953A EP 3378072 A1 EP3378072 A1 EP 3378072A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- cooling
- riser
- electrical device
- insulating liquid
- housing
- 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.)
- Withdrawn
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
- H01F27/08—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
- H01F27/08—Cooling; Ventilating
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F28—HEAT EXCHANGE IN GENERAL
- F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
- F28F2250/00—Arrangements for modifying the flow of the heat exchange media, e.g. flow guiding means; Particular flow patterns
- F28F2250/10—Particular pattern of flow of the heat exchange media
- F28F2250/104—Particular pattern of flow of the heat exchange media with parallel flow
-
- 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
- H01F27/14—Expansion chambers; Oil conservators; Gas cushions; Arrangements for purifying, drying, or filling
Definitions
- the invention relates to an electrical device with a Ge ⁇ housing, arranged in the housing and can be acted upon by high voltage active part, which he testifies in his operation heat ⁇ , provided for cooling insulating, with which the housing is filled, and a cooling system for cooling the insulating liquid having at least one heat-conducting connected to the outer atmosphere cooling element through which the insulating liquid is passed.
- radiators are equipped for cooling with radiators. These are connected directly to the housing of the transformer, so that the insulating liquid flows through the radiator from the inside ⁇ . With their outer side, the radiators are facing the atmosphere ⁇ sphere.
- a plurality of radiators are provided, which are arranged parallel to each other and form so-called radiator batteries.
- an oil conservator is provided, which is connected to the housing of the transformer. Large temperature fluctuations can cause the thermal expansion coefficient of the insulating liquid according to large volume changes, so expansive expansion vessels are necessary to accommodate the high temperatures generated during large volumes of insulating liquid in Trans ⁇ formator safe.
- the object of the invention is therefore to provide a transformer of the aforementioned type, in which temperature fluctuations are economically limited or even avoided.
- the cooling system comprises a riser section connected to the housing and provided with Steiga concernede Trenten, the attachments on each Steigabzwei- is connected to a cooling element, wherein the volume of the riser section is selected as a function of a thermal expansion ⁇ coefficient of the insulating liquid so in that the level reaches a different number of riser branches at given temperatures.
- an electrical device for example a transformer or a throttle is admirge ⁇ provides, which is equipped with a passive temperature-dependent cooling system.
- the cooling system is equipped with a riser section in ⁇ example, a riser or a riser, which is provided with riser branches.
- each Steigab- branching is connected to the input of a cooling element, so that heated upward rising insulating liquid from the riser section in the connected with the riser branch ⁇ cooling element flow.
- the volume of the insulating liquid is chosen so that when changing the temperature in the prior art Temperartur Scheme the level of the insulating liquid, al ⁇ so their surface or the level in the riser section än ⁇ changed.
- the outlet of the cooling element is again expediently connected to the housing via a pipeline, so that the cooling liquid can be guided via the respective cooling element, in other words circulating in other words.
- the configuration of the respective cooling element is arbitrary within the scope of the invention.
- the volume of the insulating liquid is chosen so that the level, ie the level of Isolierflüs ⁇ sity, within the riser section of the temperature of the insulating liquid is determined.
- Tlrben ⁇ a level or a level of the insulating liquid is reached in which the insulating liquid beyond that achieved by their Steiga responsible herein cooling element.
- the flow is conditioned by convection in the sense that heated cooling liquid flows upwards.
- the vertical distance of the Steiga concernede Trenten and the volume of the rising section, which is determined by its diameter are selected in dependence of the thermal expansion coefficient of the insulating liquid or dimensio ⁇ defined.
- the cooling system also acts as Ausdehnungsge ⁇ fäß so that the otherwise usually provided Ausdeh- tion vessel, either completely eliminated or can be made more compact.
- the housing of the electric overall con troller and fills the cooling system with so much insulating liquid, that the housing is filled at all temperatures in the réelle ⁇ known temperature range up to the lower edge of the Gezzau ⁇ se final upward lid to the Isolierthe ⁇ ness is.
- the invention also has an advantageous effect on the cold start behavior of a transformer. Is he ⁇ -making contemporary transformer, for example, after a War ⁇ tung extended period out of service and is then put back into operation or it is, for example, newly ⁇ provides the cooling need of a high level of insulating liquid is low.
- the insulating liquid can heat up faster and thus reaches its desired properties faster.
- the favorable cold start behavior of the transformer is advantageous in particular when liquid esters are used as the insulating liquid and represents a significant motivation of the invention.
- each riser ⁇ section is formed as a riser.
- the or each riser section has an obliquely ⁇ to a side wall of the housing extending oblique ⁇ section, wherein the riser branches are arranged in the inclined portion.
- the term "obliquely” means that it is not perpendicular or horizontal but inclined, in other words, the inclined section subtends an angle with a horizontal line the insulating liquid rises in the oblique section, so that, depending on the vote of Volu ⁇ men of the riser or riser section of the skew and the coefficient of thermal expansion, one, two or more cooling elements are flowed through by the insulating liquid.
- the cooling elements are arranged at different heights, ie staggered in other words in height.
- the insulating liquid is an oil, an acetic ter or other known insulating liquid with which the required voltage strength between the chip is at high voltage ⁇ active part and the housing is usually situated on Erdpoten ⁇ potential is made possible.
- Suitable esters are esters which are present in liquid form at the stated operating temperature. Such esters are also referred to as ester fluid.
- each riser branch is connected to a radiator having a plurality of internal cooling channels.
- Radiators are known in the art, so that can be dispensed with a detailed explanation and illustration here. It is essential here that the radiator has a plurality of inner cooling channels, which are all connected to an upper inlet of the radiator. At the lower end of the radiator, the cooling channels open into a lower collecting duct, which is connected to the output of the radiator and a corresponding pipe to the Ge ⁇ housing of the transformer.
- the connection of a further radiator by a corresponding increase in the insulating liquid in the riser section considerably increases the surface area of the cooling systems. In other words, the so-called
- Step height of the cooling according to this embodiment comparatively large.
- each riser branch is connected to a separate cooling pipe each.
- the cooling tube has in comparison with the one radiator a much smaller cooling surface, so that according to this illustration, a corresponding finer-level cooling is provided.
- the riser section has a vertical pipe section. This extends the housing to a side facing away from a bottom wall side, ie upwards, the Steigabzwei ⁇ tions are arranged in the vertical pipe section.
- each riser branch is connected to an inlet of a tubular tube cooling, which is connected at its output to the housing in its bottom region.
- a Steiga concernedeist with egg ⁇ nem input a line leading to a heat exchanger pipe is connected at least, wherein the heat exchanger has its output connected to the housing in the bottom region.
- the heated Isolierflüs ⁇ stechnik is guided at a certain temperature, in addition via a heat exchanger, so that the heat energy of a wide ⁇ ren use can be supplied.
- the riser branch is already connected to a heat exchanger.
- At least one riser branch is connected to a heat pipe and, for example, to so-called heat pipes.
- Heat pipes are known in the art as such, so that their Ausgestal ⁇ tion can be dispensed with in detail.
- Heat pipes or heat pipes are effective coolant and usually with a first end heat-conducting ver ⁇ connected with the object to be cooled. Due to the heating, a liquid is evaporated at this end inside the heat pipe. The endothermic evaporation provides the desired cooling. The steam then rises to a cooler spot and condenses there. The condensed liquid is brought about, for example, capillary ⁇ as of the lower end.
- a fan is provided for enhancing the cooling effect of the cooling system.
- the fan may, for example, cooperate with a heat exchange register in the sense that an air flow generated by the fan is guided past the outer surface of the cooling elements or the radiator, wherein heat is absorbed by the passing air and thus dissipated.
- the fan is connected to a control device, which in turn is connected to a level sensor.
- the level sensor provides output signals that correspond to a level in the riser section.
- the control device controls the fan, so that at high critical temperatures, the rotational speed of the fan increases and thus an increased, faster air flow is generated. This enhances the cooling effect of the fan.
- the Ventila ⁇ tor in this way also just on or off.
- the housing, the cooling elements and the riser pipe a réellefes ⁇ te, hermetically closed unit form, wherein the space is filled ⁇ upper half of the level of the insulating liquid with a komp- ressiblen inert gas.
- the compressible inert gas such as nitrogen, then acts as a gas cushion. Increases the temperature and thus the level of the insulating ⁇ liquid in the cooling system and the riser, the inert gas is compressed in the remaining over the insulating part of the cooling system.
- additional inert gas containers are filled with the via a pipeline with the gas leading part of the cooling system or the riser ver ⁇ prevented.
- the cooling function can be controlled exactly.
- the increase in the load / temperature curve can be adjusted specifically.
- the Tem perature ⁇ rose is controllable as a linear than exponential, but also as a logarithmic function, as in an inventive design of the electrical device temperature of each temperature-a particular cooling surface can be assigned.
- each Steigab ⁇ branch in the riser associated with a certain number of cooling elements depends on the respective requirements:
- the riser section above a ma ⁇ imum filling level of the insulating liquid is provided with an opening through which caused with changes in temperature of the insulating liquid changes in volume thereof, a gas exchange with the environment or other vessels is possible, and that the interior of the cooling elements the volume human fluctuations of the insulating liquid wholly or partially receives.
- the electrical device is a transformer or a choke.
- Figures 1 to 6 each show an embodiment of the electrical device according to the invention in a schematic representation.
- FIG. 1 shows a first exemplary embodiment of the device according to the invention, which here is a transformer 1.
- the transformer 1 has an active part 2, which in turn consists of a winding arrangement 4, which is wound around a magnetic core 3.
- the winding assembly 4 consists of a figuratively not shown under and high-voltage winding.
- the transformer 1 has a housing 6 which is filled with an insulating liquid 20.
- an oil conservator 26 is provided, which is connected via a pipe 15 to the housing 6 of the transformer 1.
- a cooling system 8 is arranged between the oil conservator 26 and the housing 6, a cooling system 8 is arranged.
- the cooling system 8 has a riser 15 as a riser section, which has a sloping section 15.1.
- a return pipe 16 is provided.
- each radiator 10 is in turn equipped with a plurality of mutually parallel cooling channels, which are connected via an outlet to the return pipe 16.
- levels of the insulating liquid are further illustrated by dashed lines ver ⁇ light.
- the level 21.3 corresponds to the minimum level of the insulating liquid, which sets when the Trans ⁇ formator 1 is not in operation. In normal operation, a level is set which is referenced with 21.1.
- the level 21.5 corresponds to a maximum level.
- the radiators or, in other words, cooling elements 10 are staggered in height. This height graduation has an advantageous effect on the circulation rate of the insulating liquid 20 through the cooling system 8.
- the radiators are also hydraulically connected to the transformer 1. As the temperature rises, the expansion of the insulating liquid 20 leads to an increasing fill level in the radiators 10 and the pipeline 15 and in particular in the inclined section 15.1.
- the radiators 10 can only be effective if the insulating liquid passes through them or circulates in them. For this purpose, the Isolier crampkeitstand in the
- each of the radiator 10 zugeordne ⁇ th climbing branch 9 reach.
- the arrangement of the cooling elements 10 is selected such that, depending on the desired cooling rate, a fill level of the insulating liquid corresponding number of radiators in the flow of the insulating liquid 20 einbezo ⁇ conditions. Since the cooling system 8 according to the invention assumes the recording of the thermally induced fluctuations in volume of the insulating liquid, the expansion tank 26 can be compact ⁇ staltet and completely eliminated in a different embodiment thereof.
- Figure 2 shows a different from Figure 1;sbei ⁇ game of the electrical device 1 according to the invention, here is also designed as a transformer 1.
- the housing 6 and the cooling unit 8 are so dimensioned that the lower edge of the lid of the Trans ⁇ formators at all temperatures of the insulating liquid 20 is disposed below the surface of the insulating 20th
- the lower parts of a figured not represent ⁇ high voltage bushing are always completely surrounded by the insulating liquid 20.
- the pipe 15 has a sloping portion 15.1.
- the cooling tubes 10 also act as a cooling element and depending on the level of the insulating liquid 20 in the circulation of Isolierminute- 20 are included, so that the cooling power increases so far that a balance between the heat loss of the transformer 1 and the heat output of the cooling system 8 sets. If the fill level is so high that almost all the cooling tubes 10 are included in the cooling, this is detected by a sensor 34, which is arranged in a tubular projection protruding vertically from the pipeline 15. The output signal of the sensor 34 is transferred to a control device, not shown figuratively ⁇ , which then switches on a fan 12, which provides additional cooling. The control of the fan 12 is combined with the hydraulic cooling.
- the upper collector pipe of the cooling system 8 that is to say the pipe 15, is provided with a ventilation line 18. Liquid level with increasing insulation, air is displaced from the cooling system 8 and discharged via the vent 18 and a dehumidifier 28, which is arranged at the outer end of the vent line 18 to assist in cooling the then ⁇ passing lowering of the level of the system and the insulating liquid ei ⁇ ne humidification of the insulating liquid to avoid.
- Figure 3 shows another embodiment of the inventions ⁇ to the invention transformer 1, which here has means for thermal insulation 39, are realized in the example shown by insulation boards. The thermal insulation panels 39 are attached to the outside of the housing 6 of the transformer 1.
- the housing 6 is filled with a Isolierthe ⁇ ness 20 on the basis of natural or synthetic esters as the viscosity of these fluids is significantly higher than 20 insulating fluids based on mineral oil.
- the riser branch 9 in the riser 15 is arranged such that the circulation of the insulating liquid 20 of the device in the cooling elements does not begin until a temperature of the insulating liquid 20 that ensures safe operation of the electrical device is reached.
- FIG. 1 a circuit for utilizing the heat loss of the transformer is shown in FIG. This consists of a heat exchanger 17.1 of a heating circuit for
- the entry of the Isolierrough ⁇ ness 20 is provided at a height which corresponds to a temperature at which a sensible use of the waste heat is possible.
- the additional cooling elements are at their upper fluid inlet ⁇ upper half of Steiga concernede Trent 9 for the refrigerating cycle in an embodiment with waste heat recovery
- Waste heat disposal arranged.
- an effective use of waste heat without motorized valves is possible because automatically the cycle for waste heat recovery is preferably supplied with warm coolant.
- Exceeds Ver ⁇ loss heat of the transformer 1 the heat amount required by the plant for the Ver ⁇ loss or heat utilization is the
- the insulating liquid 20 rises so that large ⁇ re cooling elements are included in the cooling system.
- the Temperaturdiffe ⁇ limit can lead to the inclusion of further cooling elements 10, precisely control.
- the insulating liquid 20 is a control ⁇ accuracy of less than 1 K possible.
- the housing of the electrical device and the cooling system are filled with so much insulating liquid 20 that the housing is filled at all temperatures inICE ⁇ known temperature range to the lower edge of the housing upwards concluding lid with the Isolierrough ⁇ ability and thus the windings 4 and the Untertei ⁇ le of the bushings 7 are always surrounded by the insulating liquid.
- the diameter of the riser pipe 15 is increased above the uppermost riser branch, so that at a further increase in temperature, the cooling capacity no longer increases with the cooling surface, but only as a function of the temperature difference to the ambient temperature.
- This Magni- fication of the cross section of the riser pipe further serves to receive a further induced by heating increase in the volume of the insulating liquid, after already al ⁇ le cooling elements are incorporated in the cooling circuit by achieving the appropriate filling level of the insulating liquid.
- FIG 4 shows an embodiment of the invention, in which conventional radiators 10.1, 10.2, 10.3 are arranged on the transformer 1, that their upper manifolds 10.8 are arranged offset in height.
- the transformer 1 has a significantly reduced in volume expansion vessel 26.
- the cooling elements 10 are at least partially ⁇ arranged at the same height and a vehicle equipped with Steiga concernede Trenton
- the j eology fill level not filled with insulating liquid 20 cooling elements 10, as well as the supply line to the cooling system are compressible gas volumes and can serve with appropriate design for an internal short circuit of the transformer as burst protection.
- Figure 5 shows a further embodiment in which the adaptation of the cooling surface to the temperature of the transformer 1 by tilting commercial plates or Rohrradi- ator 10 is achieved.
- the inclined section 15.1 of the Steigroh ⁇ res 15 is at the top, in the exemplary embodiment the input ge ⁇ genübericide, end with a vent port shipping ⁇ hen.
- the Radiative gate 10 thus acts both cooling and also serves as conservator of the transformer 1.
- the technical Lö ⁇ solution is feasible both as breathing transformer 1, as well as a hermetically sealed transformer first
- a gas compression chamber is closed ⁇ 29, which is shown in dashed lines in Figure 5 to the pipe 18 instead of the dehumidifier 28th
- the space above the insulating liquid 20 is filled with an inert gas, preferably nitrogen.
- the transformer 1 is additionally equipped with heat pipes 14. These are arranged so as to their cooling effect entfal ⁇ th only upon reaching a certain level of the insulating 20th
- the heat pipes 14 are designed for relatively high operating temperatures and lead to a considerable increase in the dissipated power loss.
- the heat pipes are for example a "heat pipe” or a “thermosiphon", known as such and manage without pumps or the like.
- the heat pipes are manufactured by the heat pipes.
- the heat pipes are manufactured by the heat pipes.
- a condensation section of the thermosyphon 14 is provided with additional cooling surfaces.
- the addition of blowing out the condensation portion of the heat pipe 14 with a fan 12.5 is mög ⁇ Lich.
- the transformer 1 is executed in the exemplary embodiment in a hermetically sealed design.
- the riser 15 is extended above the maximum level 24 with a gas compression chamber 29.
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102016200744.0A DE102016200744A1 (en) | 2016-01-20 | 2016-01-20 | Transformer with temperature-dependent cooling |
PCT/EP2017/050933 WO2017125407A1 (en) | 2016-01-20 | 2017-01-18 | Transformer with temperature-dependent cooling function |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3378072A1 true EP3378072A1 (en) | 2018-09-26 |
Family
ID=57681520
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP17700953.7A Withdrawn EP3378072A1 (en) | 2016-01-20 | 2017-01-18 | Transformer with temperature-dependent cooling function |
Country Status (7)
Country | Link |
---|---|
US (1) | US10629356B2 (en) |
EP (1) | EP3378072A1 (en) |
CN (1) | CN108475573B (en) |
CA (1) | CA3011772C (en) |
DE (1) | DE102016200744A1 (en) |
RU (1) | RU2693035C1 (en) |
WO (1) | WO2017125407A1 (en) |
Families Citing this family (12)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
EP3613130A4 (en) * | 2017-04-19 | 2020-11-25 | ABB Schweiz AG | Cooling system and cooling method |
US10719580B2 (en) | 2017-11-06 | 2020-07-21 | International Business Machines Corporation | Medical image manager with automated synthetic image generator |
EP3718385A4 (en) | 2017-12-30 | 2021-12-15 | ABB Power Grids Switzerland AG | System for sensor utilization in a transformer cooling circuit |
CN112912975A (en) * | 2018-10-19 | 2021-06-04 | Abb电网瑞士股份公司 | Heat sink for a transformer with improved cooling |
EP3702746B1 (en) * | 2019-03-01 | 2023-08-09 | Hitachi Energy Switzerland AG | High voltage system comprising a temperature distribution determining device |
EP3726547B1 (en) * | 2019-04-18 | 2022-10-05 | Siemens Energy Global GmbH & Co. KG | Method for drying a transformer comprising a multi-stage cooling system and cooling system control for such a transformer |
CN110081013B (en) * | 2019-05-21 | 2023-12-12 | 保定天威保变电气股份有限公司 | Control box capable of realizing fan rotation starting control under automatic state |
EP3767651A1 (en) * | 2019-07-17 | 2021-01-20 | Siemens Aktiengesellschaft | Method for operating a cooling system of a transformer |
EP3910655B1 (en) * | 2020-05-13 | 2023-10-25 | Hitachi Energy Switzerland AG | Electromagnetic device equipped with at least one wireless sensor |
EP4145079A1 (en) * | 2021-09-06 | 2023-03-08 | Hitachi Energy Switzerland AG | Cooling arrangement and method for cooling at least one oil-to-air external heat exchanger |
IT202100023498A1 (en) * | 2021-09-10 | 2023-03-10 | Albatros Trade S R L | APPARATUS FOR INDUCTION HEATING OF METALLIC BODIES WITH IMPROVED COOLING |
CN114373603B (en) * | 2022-01-04 | 2022-12-06 | 广东明阳电气股份有限公司 | Vegetable oil transformer with heating function |
Family Cites Families (22)
Publication number | Priority date | Publication date | Assignee | Title |
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US1476172A (en) * | 1920-09-27 | 1923-12-04 | Allis Chalmers Mfg Co | Transformer |
US1609177A (en) * | 1920-12-21 | 1926-11-30 | Westinghouse Electric & Mfg Co | Transformer radiator |
US1526771A (en) * | 1924-02-09 | 1925-02-17 | Gen Electric | Casing for transformers |
US1793820A (en) * | 1924-11-19 | 1931-02-24 | Allis Chalmers Mfg Co | Transformer or the like |
US1693324A (en) * | 1926-01-28 | 1928-11-27 | Gen Electric | Heat radiator |
US1725623A (en) * | 1928-07-23 | 1929-08-20 | Gen Electric | Electrical-apparatus casing |
US1887569A (en) * | 1931-05-25 | 1932-11-15 | Gen Electric | Casing for electrical apparatus |
DE1142000B (en) * | 1954-08-13 | 1963-01-03 | Licentia Gmbh | Arrangement for cooling electrical, liquid-cooled transformers or choke coils by means of a heat pump |
DE1613759C3 (en) * | 1968-01-25 | 1974-03-28 | Benteler Werke Ag, 4800 Bielefeld | Cooling device for transformers |
US3551863A (en) * | 1968-03-18 | 1970-12-29 | Louis L Marton | Transformer with heat dissipator |
SU1517070A1 (en) * | 1987-07-07 | 1989-10-23 | Специальное Проектно-Конструкторское Бюро По Трансформаторам Средневолжского Производственного Объединения "Трансформатор" | Arrangement for cooling an electric apparatus |
US5252778A (en) * | 1991-02-22 | 1993-10-12 | Kabushiki Kaisha Toshiba | Gas-insulated electric apparatus |
US5461873A (en) * | 1993-09-23 | 1995-10-31 | Apd Cryogenics Inc. | Means and apparatus for convectively cooling a superconducting magnet |
GB2317686B (en) * | 1996-09-26 | 2000-09-27 | Gec Alsthom Ltd | Power equipment for use underwater |
MXPA02008260A (en) * | 2000-02-24 | 2002-11-29 | Unifin International Inc | System and method for cooling transformers. |
US7443273B2 (en) | 2004-06-18 | 2008-10-28 | Siemens Aktiengesellschaft | Arrangement for cooling of components of wind energy installations |
KR20080003273A (en) * | 2007-10-24 | 2008-01-07 | 두석열 | An oil type transformer radiator |
EP2290663B1 (en) * | 2009-08-29 | 2017-01-25 | ABB Schweiz AG | Oil transformer |
CN202352446U (en) * | 2011-12-20 | 2012-07-25 | 重庆重变电器有限责任公司 | Finned radiator |
CN103337339A (en) * | 2013-06-21 | 2013-10-02 | 曾庆赣 | Heat dissipating method for oil-immersed transformer and radiator thereof |
CN204407136U (en) * | 2015-03-05 | 2015-06-17 | 维益宏基集团有限公司 | A kind of oil-immersed type transformer of Novel free respirator |
US10193340B2 (en) * | 2017-03-15 | 2019-01-29 | American Superconductor Corporation | Multi-level cascaded H-bridge STATCOM circulating cooling fluid within enclosure |
-
2016
- 2016-01-20 DE DE102016200744.0A patent/DE102016200744A1/en not_active Withdrawn
-
2017
- 2017-01-18 EP EP17700953.7A patent/EP3378072A1/en not_active Withdrawn
- 2017-01-18 WO PCT/EP2017/050933 patent/WO2017125407A1/en active Application Filing
- 2017-01-18 CA CA3011772A patent/CA3011772C/en active Active
- 2017-01-18 RU RU2018126579A patent/RU2693035C1/en active
- 2017-01-18 CN CN201780007671.2A patent/CN108475573B/en active Active
- 2017-01-18 US US16/071,569 patent/US10629356B2/en active Active
Also Published As
Publication number | Publication date |
---|---|
WO2017125407A1 (en) | 2017-07-27 |
US10629356B2 (en) | 2020-04-21 |
CA3011772A1 (en) | 2017-07-27 |
CA3011772C (en) | 2021-07-27 |
DE102016200744A1 (en) | 2017-07-20 |
US20190027292A1 (en) | 2019-01-24 |
CN108475573A (en) | 2018-08-31 |
CN108475573B (en) | 2021-06-18 |
RU2693035C1 (en) | 2019-07-01 |
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