EP0043511B1 - Einrichtung zur Nutzbarmachung der Verlustwärme von im Inneren flüssigkeitsgekühlten Transformatoren oder Drosselspulen - Google Patents

Einrichtung zur Nutzbarmachung der Verlustwärme von im Inneren flüssigkeitsgekühlten Transformatoren oder Drosselspulen Download PDF

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Publication number
EP0043511B1
EP0043511B1 EP81104933A EP81104933A EP0043511B1 EP 0043511 B1 EP0043511 B1 EP 0043511B1 EP 81104933 A EP81104933 A EP 81104933A EP 81104933 A EP81104933 A EP 81104933A EP 0043511 B1 EP0043511 B1 EP 0043511B1
Authority
EP
European Patent Office
Prior art keywords
temperature
heat
transformer
normal cooling
internal coolant
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.)
Expired
Application number
EP81104933A
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German (de)
English (en)
French (fr)
Other versions
EP0043511A1 (de
Inventor
Wolfgang Dr. Matthes
Heinz Dipl.-Ing. Ubl
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.)
Transformatoren Union AG
Original Assignee
Transformatoren Union 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 Transformatoren Union AG filed Critical Transformatoren Union AG
Priority to AT81104933T priority Critical patent/ATE9626T1/de
Publication of EP0043511A1 publication Critical patent/EP0043511A1/de
Application granted granted Critical
Publication of EP0043511B1 publication Critical patent/EP0043511B1/de
Expired legal-status Critical Current

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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F24—HEATING; RANGES; VENTILATING
    • F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
    • F24D11/00—Central heating systems using heat accumulated in storage masses
    • F24D11/002—Central heating systems using heat accumulated in storage masses water heating system
    • F24D11/005—Central heating systems using heat accumulated in storage masses water heating system with recuperation of waste heat
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28D—HEAT-EXCHANGE APPARATUS, NOT PROVIDED FOR IN ANOTHER SUBCLASS, IN WHICH THE HEAT-EXCHANGE MEDIA DO NOT COME INTO DIRECT CONTACT
    • F28D21/00—Heat-exchange apparatus not covered by any of the groups F28D1/00 - F28D20/00
    • F28D21/0001—Recuperative heat exchangers
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F28—HEAT EXCHANGE IN GENERAL
    • F28F—DETAILS OF HEAT-EXCHANGE AND HEAT-TRANSFER APPARATUS, OF GENERAL APPLICATION
    • F28F27/00—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus
    • F28F27/02—Control arrangements or safety devices specially adapted for heat-exchange or heat-transfer apparatus for controlling the distribution of heat-exchange media between different channels
    • 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

Definitions

  • the invention relates to a device for harnessing the heat loss from liquid-cooled transformers or choke coils via heat exchangers or heat pumps fitted in addition to the normal cooling device for the cooling liquid, with regulation of the temperature of the internal coolant by throttling the normal cooling device.
  • a transformer or a choke coil is not always operated with full load, but only with partial load, with less heating than under nominal conditions.
  • a relatively low and usually strongly fluctuating temperature level is reached, which means that a comparatively large technical effort is required to utilize the lost energy with the previous means.
  • This low temperature level is due to the long-term behavior of the insulating materials used in the transformer, which must not be subjected to excessive thermal stress to achieve the desired long service life.
  • the amount of energy lost in transformers is relatively small due to their very high level of development.
  • a device for utilizing the heat loss from transformers, in which the temperature of an internal coolant is regulated by throttling the normal cooling device.
  • the disadvantage of this known device is that a fixed maximum temperature for the internal coolant is specified for all load cases, and consequently there is no further-reaching permissible temperature increase in the internal coolant in the part-load range.
  • the invention is therefore based on the object of improving the economy of a device for waste heat recovery from transformers by increasing the working temperature of the internal coolant, taking into account different load conditions, to such an extent that, compared to the condition without waste heat recovery, there is no increased thermally-related service life consumption of the transformer winding insulation or of the choke coil, taking into account that the highest thermal stress on the winding insulation depends on the hot spot temperature on the conductor of the winding.
  • this object is achieved in that when measuring the temperature of the internal coolant under the boiler cover the setpoint cp so " for the temperature control with increasing load on the transformer or the choke coil is reduced in such a way that one for the insulation is independent of the load the winding results in the maximum permissible hot spot temperature at the conductor of the winding with regard to its normal service life consumption.
  • the setpoint for the temperature of the internal coolant can additionally be adjusted taking into account different heating requirements depending on the ambient temperature.
  • parts of the normal cooling device such as radiators, oil-air or oil-water coolers, are throttled individually or combined via manifolds at a few or only a single point, the throttling being intermittently effective.
  • the device according to the invention is very advantageous, because it increases the economic efficiency in the utilization of the power loss of transformers essentially by increasing the temperature of the internal coolant to values at which there is just yet no consumption of life, by the partial load between the transformer winding and the internal coolant temperature difference actually occurring is taken into account. For this reason, an increase in the coolant temperature is possible under partial load conditions, without this leading to increased service life consumption for the insulating materials used.
  • a conventional transformer tank 1, shown only schematically, is provided on one broadside for normal cooling of the internal coolant oil heated in the interior of the transformer by the winding and iron losses with a cooling device 2, which is usually made of radiators, oil coolers with forced air cooling or oil. Water coolers exist.
  • a manifold 3 connects the oil return of several parts of the cooling device 2 and leads to a throttle point shown as valve 5.
  • the valve 5 is automatically set via a temperature sensor 4 in the cover oil and via a temperature controller 13 in accordance with a predetermined temperature setpoint such that the values for the cover oil temperature specified by a setpoint generator are maintained.
  • the temperature setpoint is primarily dependent on the load on the transformer and can also be varied depending on the heat requirement for heating purposes or for domestic water heating.
  • an oil-water heat exchanger 7 is connected in parallel to the normal cooling device 2 via a valve 11 in the oil flow and via a valve 12 in the oil return, the oil circuit of which is driven by a pump 6.
  • the water heated in the heat exchanger 7 is pressed by a water pump 8 into a water flow 9.
  • the cooled water returns to the heat exchanger 7 in a closed circuit via a water return 10.
  • the pipe 10 serves as a fresh water inlet and the pipe 9 discharges the heated water from the heat exchanger 7.
  • valve 5 in the oil return is via the temperature sensor 4 in the cover oil of the transformer and the temperature controller 13 the normal transformer cooling device 2 more or less opened and dissipated the excess amount of heat. This means that no further temperature control device is required in the water circuit.
  • the temperature controller 13 can, for example, by appropriately specifying the temperature setpoint of the cover oil.
  • B. take into account the fact that the heat requirement and thus the flow temperature of the water in the heating system should increase with a decreasing ambient temperature in order to always achieve the same room temperature.
  • the heat loss of the transformer can also be extracted from the coolant via the evaporator of a heat pump. In these cases, the heat loss from the transformer is raised to a higher temperature level by using a heat pump.

Landscapes

  • Engineering & Computer Science (AREA)
  • Physics & Mathematics (AREA)
  • Thermal Sciences (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Combustion & Propulsion (AREA)
  • Transformer Cooling (AREA)
  • Protection Of Transformers (AREA)
  • General Induction Heating (AREA)
  • Coils Of Transformers For General Uses (AREA)
EP81104933A 1980-07-07 1981-06-25 Einrichtung zur Nutzbarmachung der Verlustwärme von im Inneren flüssigkeitsgekühlten Transformatoren oder Drosselspulen Expired EP0043511B1 (de)

Priority Applications (1)

Application Number Priority Date Filing Date Title
AT81104933T ATE9626T1 (de) 1980-07-07 1981-06-25 Einrichtung zur nutzbarmachung der verlustwaerme von im inneren fluessigkeitsgekuehlten transformatoren oder drosselspulen.

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE3025661 1980-07-07
DE3025661A DE3025661C2 (de) 1980-07-07 1980-07-07 Einrichtung zur Nutzbarmachung der Verlustwärme von im Inneren flüssigkeitsgekühlten Transformatoren oder Drosselspulen

Publications (2)

Publication Number Publication Date
EP0043511A1 EP0043511A1 (de) 1982-01-13
EP0043511B1 true EP0043511B1 (de) 1984-09-26

Family

ID=6106569

Family Applications (1)

Application Number Title Priority Date Filing Date
EP81104933A Expired EP0043511B1 (de) 1980-07-07 1981-06-25 Einrichtung zur Nutzbarmachung der Verlustwärme von im Inneren flüssigkeitsgekühlten Transformatoren oder Drosselspulen

Country Status (7)

Country Link
US (1) US4456899A (ja)
EP (1) EP0043511B1 (ja)
JP (1) JPS5752115A (ja)
AT (1) ATE9626T1 (ja)
CA (1) CA1179423A (ja)
DE (1) DE3025661C2 (ja)
DK (1) DK150049C (ja)

Families Citing this family (23)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE3221848A1 (de) * 1982-04-07 1983-10-13 Transformatoren Union Ag, 7000 Stuttgart Einrichtung zur nutzbarmachung der verlustwaerme von transformaten
JPH0230066Y2 (ja) * 1985-06-11 1990-08-13
US4739825A (en) * 1986-01-14 1988-04-26 General Electric Company Apparatus for cooling the core of a liquid cooled transformer
ES2131258T3 (es) * 1994-12-02 1999-07-16 Gen Motors Corp Cable de transmision de alta frecuencia y alta potencia controlado ambientalmente para cargador inductor.
DE19639763A1 (de) * 1996-09-27 1998-04-09 Jeannette Bastian Systemische Kombination von Vorrichtungen zum Zweck der Konstanthaltung von Temperatur, Volumen und Druck von flüssigkeitsgekühlten statischen elektrischen Maschinen, insbesondere integralbefüllten und Gaspolster-Hermetik-Transformatoren
US6401518B1 (en) 1999-07-29 2002-06-11 General Electric Company Fluid filled electrical device with diagnostic sensor located in fluid circulation flow path
US6909349B1 (en) 1999-11-17 2005-06-21 Trexco, Llc Apparatus and method for cooling power transformers
CZ20021633A3 (cs) * 1999-11-17 2003-02-12 Trexco, Llc. Způsob snížení teploty chladícího média transformátoru a systém k provádění tohoto způsobu
DE102010006308A1 (de) * 2010-01-30 2011-08-04 Maschinenfabrik Reinhausen GmbH, 93059 Laststufenschalter
DE102012207844A1 (de) * 2012-05-10 2013-11-14 Alstom Technology Ltd. Anordnung mit einem Transformator
CN105005260A (zh) * 2013-04-26 2015-10-28 国网山东省电力公司青岛供电公司 一种变压器智能风冷变频节能方法及系统
CN103308802A (zh) * 2013-06-06 2013-09-18 国家电网公司 一种变压器蒸发冷却实验系统
CN103677007A (zh) * 2013-12-03 2014-03-26 柳州市五环水暖器材经营部 矿热炉变压器的油循环水冷控制系统
CN103779046B (zh) * 2013-12-17 2016-01-13 浙江金冠特种变压器有限公司 变压器降温装置
CN104952589B (zh) * 2015-06-11 2016-08-24 国网山东滨州市滨城区供电公司 一种输电系统用高效降温过滤油浸式变压器
US10145830B2 (en) * 2015-12-10 2018-12-04 Roger Alan FENTON Monitoring power devices
DE102016207393A1 (de) * 2016-04-29 2017-11-02 Siemens Aktiengesellschaft Ersatztransformator mit modularem Aufbau
EP3343575B1 (en) * 2016-12-28 2020-03-18 ABB Schweiz AG A pressure compensator of a subsea installation
CN106653291A (zh) * 2017-01-10 2017-05-10 全球能源互联网研究院 一种利用日夜温差对变压器强迫油循环冷却的系统
US10366817B2 (en) 2017-05-02 2019-07-30 General Electric Company Apparatus and method for passive cooling of electronic devices
CN108878101A (zh) * 2018-06-28 2018-11-23 国网河南省电力公司邓州市供电公司 一种地埋式变压器保护装置
EP3726547B1 (de) * 2019-04-18 2022-10-05 Siemens Energy Global GmbH & Co. KG Verfahren zur trocknung eines ein mehrstufiges kühlsystem aufweisenden transformators und kühlersteuerung für einen solchen transformator
NL2031715B1 (nl) * 2022-04-26 2023-11-10 Ti Green B V Verwarmingsinrichting

Family Cites Families (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR745612A (ja) * 1933-05-13
BE547822A (ja) *
US1597771A (en) * 1921-05-11 1926-08-31 Westinghouse Electric & Mfg Co Transformer-cooling system
US1643014A (en) * 1925-12-07 1927-09-20 Pittsburgh Transformer Co Cooling system for electrical apparatus
US2440556A (en) * 1944-03-08 1948-04-27 Gen Electric Electrical apparatus
DE1122237B (de) * 1955-02-28 1962-01-18 Licentia Gmbh Einrichtung zum Ausnutzen der Verlustwaerme fluessigkeitsgekuehlter, elektrischer Geraete, wie Transformatoren od. dgl.
CH349339A (de) * 1955-05-14 1960-10-15 Licentia Gmbh Anlage zum Abführen der Verlustwärme flüssigkeitsgekühlter, elektrischer Maschinen und Apparate
CH349335A (de) * 1955-05-27 1960-10-15 Elin Union Ag Anlage mit zwei oder mehreren, mit Wärmeaustauschern zur Verlustwärmeverwertung ausgerüsteten elektrischen Einrichtungen
DE2209938B2 (de) * 1972-03-02 1976-12-30 Karl Pfisterer Elektrotechnische Spezialartikel, 7000 Stuttgart Unterirdische transformatorstation
JPS5061624A (ja) * 1973-10-03 1975-05-27
JPS548829A (en) * 1977-06-22 1979-01-23 Hitachi Ltd Cooler for oil-filled equipment
JPS5438519A (en) * 1977-09-02 1979-03-23 Hitachi Ltd Cooling control system for transformer

Also Published As

Publication number Publication date
DE3025661A1 (de) 1982-02-04
EP0043511A1 (de) 1982-01-13
DK297881A (da) 1982-01-08
US4456899A (en) 1984-06-26
DK150049C (da) 1987-05-11
DE3025661C2 (de) 1982-11-04
DK150049B (da) 1986-11-24
JPS5752115A (en) 1982-03-27
CA1179423A (en) 1984-12-11
ATE9626T1 (de) 1984-10-15

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