EP1859331B1 - Procede de commande de refroidissement sur un transformateur de puissance - Google Patents

Procede de commande de refroidissement sur un transformateur de puissance Download PDF

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Publication number
EP1859331B1
EP1859331B1 EP05815353A EP05815353A EP1859331B1 EP 1859331 B1 EP1859331 B1 EP 1859331B1 EP 05815353 A EP05815353 A EP 05815353A EP 05815353 A EP05815353 A EP 05815353A EP 1859331 B1 EP1859331 B1 EP 1859331B1
Authority
EP
European Patent Office
Prior art keywords
oil
cooling
winding temperature
cooling stage
limit value
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.)
Not-in-force
Application number
EP05815353A
Other languages
German (de)
English (en)
Other versions
EP1859331A1 (fr
Inventor
Thorsten Krueger
Manfred Stadelmayer
Karsten Viereck
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.)
Maschinenfabrik Reinhausen GmbH
Scheubeck GmbH and Co
Original Assignee
Maschinenfabrik Reinhausen GmbH
Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG
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 Maschinenfabrik Reinhausen GmbH, Maschinenfabrik Reinhausen Gebrueder Scheubeck GmbH and Co KG filed Critical Maschinenfabrik Reinhausen GmbH
Priority to PL05815353T priority Critical patent/PL1859331T3/pl
Publication of EP1859331A1 publication Critical patent/EP1859331A1/fr
Application granted granted Critical
Publication of EP1859331B1 publication Critical patent/EP1859331B1/fr
Not-in-force legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • H01F27/08—Cooling; Ventilating
    • H01F27/10—Liquid cooling
    • H01F27/12—Oil cooling

Definitions

  • the invention relates to a method for controlling devices for cooling an oil-filled power transformer as a function of its oil or winding temperature.
  • Oil-filled power transformers are internationally characterized by their design and type of cooling with a 4-letter code.
  • the first two letters refer to the type of cooling of the transformer itself; for this there is the abbreviation ON for "Oil Natural”, OF for “Oil Forced”, OP for “Oil Forced”, but with an oil cooling system with axial pump, OD for "Oil Directed”, as well as GF for "Gas Forced” (for transformers with SF 6 cooling) as special design.
  • the following two letters indicate the respective type of cooling medium; there are ON for "Air Natural”, AF for "Air Forced”, WF for "Water Forced”.
  • transformers By combining different types of cooling of transformers as well as different types of cooling medium therefore exist a variety of types of transformers, which can be represented by the illustrated coding.
  • an oil-filled power transformer usually has several cooling stages, which can be based on different types of cooling or types of cooling medium.
  • the object of the invention is to provide a method that decreases the user this complex activities.
  • the method according to the invention makes use of the circumstance that the calculation rules to be used for calculating the specific oil and winding temperatures, including the respective variables and parameters, are clearly defined in the cited IEC and must therefore be used by the user. Therefore, these values are already stored non-volatile in the factory, so that practically only one parameter has to be entered manually: The 4-letter coding for each existing cooling stage of the corresponding power transformer.
  • the offered by the Applicant electronic control unit TAPCON ® is the 260th
  • a unique non-volatile storage of all possible 4-letter codes and the associated specific variables and calculation instructions according to the explained IEC is made in the factory in the respective controller or the electronic control unit in which the process is to run.
  • This calculation is made in accordance with the specific requirements of IEC 354 applicable to the particular transformer. For this calculation, the top oil temperature, the load current, the load factor - that is the quotient of the load current and the rated current - and other specific ones provided by the IEC Parameter used.
  • Separate comparison is meant that it is first checked whether the calculated value ⁇ exceeds the limit value ⁇ 1 , for the first cooling stage. If this is the case, the first cooling stage is activated. Furthermore, it is checked whether the calculated value ⁇ is so large that, moreover, it also exceeds the limit value ⁇ 2 of the second cooling stage. In such a case, the second cooling stage is activated. This comparison is continued for any further cooling stages in an analogous manner.
  • the control unit used for carrying out the method in this example has four switching contacts S1 ... S4; it is suitable for a transformer with up to four different cooling levels 1 ... 4. If fewer cooling stages are available for the respective transformer, the remaining contacts remain unused.
  • Cooling level 0, d. H. Normal operation is usually always called ONAN. Cooling stages with the same type of cooling are indicated in ascending order with an index beginning with the number 1. Each cooling stage is associated with characteristic parameters, the gradient gr, the winding exponent y and the winding time constant tau, which depend on the type of transformer and the type of cooling, and thus on the respective 4-letter coding.
  • the described comparison of the calculated temperature ⁇ with the respective limit value ⁇ 1 ,... ⁇ n for each cooling stage 1... N is subsequently carried out using these non-volatile stored values.
  • the transformer actually has four cooling stages 1... 4, so that all contacts S1... S4 present on the control unit are occupied here.
  • the switching contact 5 when exceeding the limit ⁇ 4 for the last cooling stage 4 triggers a warning signal that signals that the regular cooling stages are obviously not able to (over ) heated power transformer to cool down again.
  • One reason for this can be z. B. are in a failed pump.
  • Another switching contact 6 is triggered, although the limit value for this warning message is still significantly exceeded; then the entire transformer is shut down to prevent damage.
  • the cooling stages 1... 3 are designed in the ONAF design and, as explained above, are therefore supplemented by an index 1.
  • the last cooling stage 4 in this example is of the OPAF type.
  • both the calculated oil temperature and the calculated winding temperature can be used as the comparison variable in the method according to the invention, which is why here consistently both types of calculated temperature are provided with the same reference symbol ⁇ . Differences arise, however, in terms of responsiveness, since the winding temperature changes much faster than the oil temperature, which follows with a certain inertia of this.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Protection Of Transformers (AREA)
  • Transformer Cooling (AREA)

Claims (1)

  1. Procédé pour la commande de dispositifs servant au refroidissement d'un transformateur de puissance rempli d'huile avec au moins un étage de refroidissement (1 ...n) en fonction de sa température d'huile ou d'enroulement S, la température d'huile ou d'enroulement 9 étant déterminée conformément aux prescriptions CEI et comparée à une valeur limite correspondante, pour que dans les résultats du comparatif, des informations soient générées pour l'actionnement d'un étage de refroidissement au moins,
    pour que l'étage de refroidissement respectif (1...n) soit actionné si sa valeur limite respective 91...9a est dépassée
    et pour qu'un avertissement, un message d'erreur ou le déclenchement d'un disjoncteur de protection soit lancé si la température d'huile ou d'enroulement 9 actuelle dépasse aussi une valeur limite pour le dernier étage de refroidissement (n),
    caractérisé en ce que
    le mode de refroidissement respectif du transformateur et le type d'agent de refroidissement sont entrés séparément sous forme de codage à 4 lettres pour chaque étage de refroidissement (1 ...n),
    le codage à 4 lettres respectivement entré est comparé à un tableau non volatil enregistré préalablement qui contient tous les codages à 4 lettres réalisables techniquement et aux variables et règles de calcul spécifiques assignées selon CEI,
    les règles de calcul, variables et constantes respectivement applicables pour le calcul de la température d'huile ou d'enroulement 9 sont déterminées pour les codages à 4 lettres entrés et chaque température d'huile ou d'enroulement 9 calculée est comparée à une valeur limite enregistrée de manière non volatile 91 ... 9a pour la température d'huile ou d'enroulement pour chaque étage de refroidissement existant (1...n).
EP05815353A 2005-03-15 2005-11-22 Procede de commande de refroidissement sur un transformateur de puissance Not-in-force EP1859331B1 (fr)

Priority Applications (1)

Application Number Priority Date Filing Date Title
PL05815353T PL1859331T3 (pl) 2005-03-15 2005-11-22 Sposób sterowania chłodzeniem na transformatorze mocy

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
DE102005011835 2005-03-15
PCT/EP2005/012455 WO2006097142A1 (fr) 2005-03-15 2005-11-22 Procede de commande de refroidissement sur un transformateur de puissance

Publications (2)

Publication Number Publication Date
EP1859331A1 EP1859331A1 (fr) 2007-11-28
EP1859331B1 true EP1859331B1 (fr) 2008-10-29

Family

ID=35597791

Family Applications (1)

Application Number Title Priority Date Filing Date
EP05815353A Not-in-force EP1859331B1 (fr) 2005-03-15 2005-11-22 Procede de commande de refroidissement sur un transformateur de puissance

Country Status (6)

Country Link
EP (1) EP1859331B1 (fr)
AT (1) ATE412935T1 (fr)
DE (1) DE502005005836D1 (fr)
ES (1) ES2314737T3 (fr)
PL (1) PL1859331T3 (fr)
WO (1) WO2006097142A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104035457B (zh) * 2014-05-29 2016-10-05 河北省电力建设调整试验所 一种根据变压器热老化率实时控制变压器冷却装置的方法

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US4360849A (en) * 1981-03-04 1982-11-23 Rte-Asea Corporation Power distribution system
US6714022B2 (en) * 2001-02-20 2004-03-30 Gary Hoffman Apparatus and method for cooling power transformers
US6906630B2 (en) * 2001-02-28 2005-06-14 General Electric Company Transformer management system and method

Also Published As

Publication number Publication date
DE502005005836D1 (de) 2008-12-11
PL1859331T3 (pl) 2009-04-30
ES2314737T3 (es) 2009-03-16
ATE412935T1 (de) 2008-11-15
EP1859331A1 (fr) 2007-11-28
WO2006097142A1 (fr) 2006-09-21

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