WO2013018107A1 - Ensemble de transformation d'énergie électrique - Google Patents

Ensemble de transformation d'énergie électrique Download PDF

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Publication number
WO2013018107A1
WO2013018107A1 PCT/IT2011/000274 IT2011000274W WO2013018107A1 WO 2013018107 A1 WO2013018107 A1 WO 2013018107A1 IT 2011000274 W IT2011000274 W IT 2011000274W WO 2013018107 A1 WO2013018107 A1 WO 2013018107A1
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WO
WIPO (PCT)
Prior art keywords
point
value
multiplied
voltage
current
Prior art date
Application number
PCT/IT2011/000274
Other languages
English (en)
Inventor
Ernesto D'ANTUONO
Original Assignee
Energia Europa S.R.L.
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 Energia Europa S.R.L. filed Critical Energia Europa S.R.L.
Priority to PCT/IT2011/000274 priority Critical patent/WO2013018107A1/fr
Publication of WO2013018107A1 publication Critical patent/WO2013018107A1/fr

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Classifications

    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F29/00—Variable transformers or inductances not covered by group H01F21/00
    • H01F29/02—Variable transformers or inductances not covered by group H01F21/00 with tappings on coil or winding; with provision for rearrangement or interconnection of windings

Definitions

  • the present invention relates to an improved electrical energy transformation assembly, supplied by an external power source, such as the mains power supply network, in order to appropriately supply an electrical load.
  • the invention also relates to a three-phase transformer, each phase of which comprises one of the above-mentioned transformation assemblies according to the invention.
  • a transformer is a static electrical machine capable of converting the values of the input electrical quantities, i.e. the input voltage Vj and the input current lj, into suitable output values V 0 and l 0 , for supplying a load connected downstream from said transformer.
  • the present invention aims to overcome the aforesaid drawbacks.
  • the main object of the invention is to produce an electrical energy transformation assembly capable of achieving a high degree of energy saving by the load by comparison with the transformer machines according to the known state of the art.
  • one object of the present invention is to produce an electrical energy transformation assembly capable of attenuating the harmonics contained in the signals of the electrical quantities involved.
  • Another object of the present invention is to produce a transformation assembly capable of attenuating the distortions coming from the power supply network.
  • a further object of the present invention is to produce a transformation assembly capable of attenuating the inrush current peaks when the transformer starts up, with a balancing of the energy transmission.
  • Another object of the invention is to produce a transformation assembly capable of attenuating the current peaks in the waveforms at the rated frequency.
  • a further, not necessarily last object of the invention is to produce a transformation assembly capable of optimising the regulation of the energy transmission.
  • the transformation assembly according to the invention comprises a primary winding electromagnetically coupled to a secondary winding, wherein the primary winding comprises at least two adjacent portions of suitably dimensioned winding.
  • the various elements comprising the transformation assembly according to the invention are dimensioned with reference to the rated voltages established on one of the aforesaid two portions (considered as the principal portion), the rated current identified on the secondary winding, and the value of the magnetic induction relating to the configuration defined by said principal portion of the primary winding and secondary winding.
  • Said reference values are multiplied by specific ratio coefficients, described in detail below, that enable the dimensioning of the various elements forming part of the transformation assembly according to the invention, thereby achieving a high level of efficiency.
  • the invention also relates to the three-phase transformer, each phase of which is made with a transformation assembly according to the invention.
  • FIG. 1 schematically represents a first embodiment of the transformation assembly according to the invention
  • - fig. 3 schematically represents a third embodiment of the transformation assembly according to the invention
  • - fig. 4 schematically represents a fourth embodiment of the transformation assembly according to the invention
  • FIG. 5 schematically represents a fifth embodiment of the transformation assembly according to the invention.
  • - fig. 8 shows two graphs comparing the energy consumption of a commercial complex respectively using (in the "saving” configuration) or not using (in the "bypass” configuration) the three-phase transformer according to the invention.
  • the transformation assembly according to the invention is globally illustrated in figures from 1 to 6, where it is identified by the numeral 1.
  • the transformation assembly 1 for the transformation of the electrical energy supplied from a power source in order to appropriately supply a load, comprises a primary winding 2 connected to the above-mentioned power source and electromagnetically coupled to a secondary winding 3, connected in turn to a load.
  • the first embodiment of the transformation assembly 1 according to the invention is shown in fig. 1 , which shows that the primary winding 2 comprises two portions 21 and 22 of winding connected electrically in series.
  • the transformation assembly 1 is dimensioned so that the value of the voltage Vp 0 -P2 established between the first point P0 and the third point P2 of the primary winding 2 - and therefore, in this embodiment, the voltage value established on the whole primary winding 2 - is in the range defined by the voltage V kvp applied to the principal portion 21 multiplied by the coefficients 1.2043 - 2% and 1.2043 + 2%.
  • the value established for the voltage VPO-P2 is preferably, but not necessarily, the result of Vkv multiplied by the coefficient 1.2043.
  • the dimensioning of the transformation assembly 1 must be such that the value of the voltage Vso-si between the first end SO and the second end S1 of the secondary winding 3 is in the range defined by said voltage V kvp multiplied by the coefficients 0.1021 - 5% and 0.1021 + 5%.
  • Vso-si is preferably, but not necessarily, obtained by multiplying the voltage V kvp by the coefficient 0.1021.
  • the value of the current IPO-PI that flows through the main portion 21 of the primary winding 2 must also be defined.
  • said current value IPO-PI is in the range defined by the current Ikas flowing in the secondary winding 3 multiplied by the coefficients 0.1133 - 5% and 0.1133 + 5%.
  • the value of the current IPO-PI is preferably, but not necessarily, the current Ikas multiplied by the coefficient 0.1133.
  • the value of the current Ip-i.p2 flowing in the second portion 22 shall be in the range defined by said current lk as multiplied by the coefficients 0.0940 - 5% and 0.0940 + 5%.
  • the value of the current IPI.P2 is the current Ikas multiplied by the coefficient 0.0940.
  • the transformation assembly 1 is dimensioned so that the value of the magnetic induction relating to the configuration defined by the primary winding 2, extending between the first point P0 and the third point P2, and by the secondary winding 3 is in the range defined by the coefficient of magnetic induction Ckim relating to the configuration comprising the principal portion 21 of said primary winding 2 and of the secondary winding 3, multiplied by the coefficients 0.9965 - 0.03% and 0.9965 + 0.03%.
  • Said value of the magnetic induction is preferably, but not necessarily, the coefficient of magnetic induction Ckim multiplied by the coefficient 0.9965.
  • a second embodiment of the transformation assembly 1 according to the invention, shown in fig. 2, involves a further portion 23 being added to the primary winding 2 of said first embodiment shown in fig. 1 , which has all the same characteristics as those amply described above, extending from the third point P2 up to a fourth point P3.
  • said portion 23 is dimensioned so that the value of the voltage VP O -P3 established between the first point P0 and the fourth point P3 of the primary winding 2 is in the range defined by said voltage Vk Vp multiplied by the coefficients 1.5149 - 2% and 1.5149 + 2%.
  • said embodiment involves the voltage value Vp 0 .p3 to obtain being the result of the voltage V KVP multiplied by the coefficient 1.5149.
  • the value of the current IP2-P3 flowing through said third portion 23 is in the range defined by the current Ikas multiplied by the coefficients 0.0748 - 5% and 0.0748 + 5%.
  • Said current value Ip2- 3 flowing through said third portion 23 is preferably, but not necessarily, Ikas multiplied by 0.0748.
  • a third embodiment of the transformation assembly 1 according to the invention is shown in fig. 3, where a fourth portion 24 is added to the primary winding 2 of the transformation assembly 1 in its above-described second embodiment, extending from the fourth point P3 to a fifth point P4.
  • said fourth portion 24 is dimensioned so that the value of the voltage V P0 -P4 established between the first point P0 and said fifth point P4 of the primary winding 2 is in the range defined by the voltage V KVP multiplied by the coefficients 2.0851 - 2% and 2.0851 + 2%.
  • said voltage value V P0- P4 coincides with the voltage Vkvp multiplied by the coefficient 2.0851.
  • the dimensioning of said fourth portion 24 is such that the value of the current Ip3-P4 flowing through said portion is in the range defined by the current l kas multiplied by the coefficients 0.0543 - 5% and 0.0543 + 5%.
  • said current Ip3-P4 is preferably, but not necessarily, the product of Ikas multiplied by 0.0543.
  • Figs. 4 to 6 respectively illustrate a fourth, fifth and sixth type of embodiment of the transformation assembly 1 according to the invention.
  • all these three further embodiments have a characteristic in common, i.e. the fact that the primary winding 2 comprises a so-called safety portion 25 extending from the first point P0 to a sixth point defined as -P1.
  • the fourth embodiment is simply the first embodiment shown in fig. 1 with the addition of the safety portion 25, and the fifth embodiment coincides with the second embodiment of the transformation assembly 1 according to the invention shown in fig. 2, with the addition of said safety portion 25, as shown in fig. 5.
  • Said safety portion 25 is what also distinguishes the sixth embodiment of the transformation assembly 1 according to the invention, shown in fig. 6, from the type of transformation assembly 1 shown in fig. 3.
  • said safety portion 25 is dimensioned so that the value of the voltage V. P i. P0 established between the sixth point -P1 and the first point P0 of the primary winding 2 is in the range defined by the voltage V kV p multiplied by the coefficients 0.6383 - 2% and 0.6383 + 2%; in particular, said voltage V. P i. P0 acquires the voltage value of V kvp multiplied by 0.6383.
  • said dimensioning enables a current l. P i- P o flowing through the safety portion 25 to be obtained in the range defined by said current Uas multiplied by the coefficients 0.0691 - 5% and 0.0691 + 5%.
  • the current value l. P i. P o flowing through the safety portion 25 is preferably, but not necessarily, the current Ikas multiplied by the coefficient 0.0691.
  • these include choosing a suitable number of turns on the two windings 2 and 3 and/or choosing a suitable cross-section for the conductor used to make said primary and secondary windings 2 and 3, and/or choosing the type and size of the ferromagnetic material on which said primary 2 and secondary 3 windings are wound.
  • V kvp taken as a reference for the dimensioning of the various elements in the transformation assembly 1 according to the invention, this may preferably, but not necessarily, coincide with the rated voltage of the mains power supply network.
  • this preferably, but not necessarily, has a typical value in the range of 0.9 to 1.5 Tesla.
  • the established value differs from said typical value in the range of 0.9 to 1.5 Tesla.
  • the current I kas this obviously depends on the load connected to the secondary winding 3 on the transformation assembly 1, and can consequently only be decided in the design stage.
  • the transformation assembly 1 can be used as a separate, single-phase transformer, or it may be used to make a three-phase transformer 100.
  • the present invention also concerns a three-phase transformer 100, wherein each phase comprises a transformation assembly 1 as described above.
  • the three-phase transformer 100 according to the invention is connected to a power source A, as illustrated schematically in fig. 7, comprising a three-phase circuit for enabling the transformation of the electrical quantities received as input and adapting them to a load L of three-phase type located downstream from said three-phase transformer 100.
  • a power source A as illustrated schematically in fig. 7, comprising a three-phase circuit for enabling the transformation of the electrical quantities received as input and adapting them to a load L of three-phase type located downstream from said three-phase transformer 100.
  • the loads at the above-mentioned commercial complex consisted of approximately 8% for electronic equipment, 77% for lighting, 5% for escalators, and 10% for lifts.
  • the invention achieves the object of producing an electrical energy transformation assembly capable of obtaining a high degree of energy saving by comparison with the electrical energy transformation machines according to the known state of the art.
  • the invention achieves the object of producing an electrical energy transformation assembly capable of attenuating the harmonics contained in the signals of the electrical quantities involved.
  • the invention achieves the object of producing a transformation assembly capable of attenuating the distortions coming from the mains power supply.
  • the invention also achieves the object of producing a transformation assembly capable of attenuating the inrush current peaks during the start-up phase, with the balancing of the energy transmission.
  • Another object achieved is the production of a transformation assembly capable of attenuating the current peaks in the waveforms at the rated frequency.
  • a further object achieved by the invention is that it produces a transformation assembly capable of optimizing the control of the energy transmission.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Coils Of Transformers For General Uses (AREA)

Abstract

La présente invention a trait à un ensemble de transformation d'énergie électrique (1) qui est alimenté par un bloc d'alimentation (A) en vue de fournir de façon appropriée de l'énergie à une charge (L), lequel ensemble de transformation d'énergie électrique comprend un enroulement primaire (2) qui est connecté au bloc d'alimentation (A) et couplé de façon électromagnétique à un enroulement secondaire (3) qui est connecté à la charge (L). L'ensemble de transformation (1) comprend l'enroulement primaire (2) qui est constitué de deux portions (21, 22), une portion principale (21) s'étendant entre un premier point (PO) et un deuxième point (P1) et la seconde portion (22) s'étendant depuis un deuxième point (P1) jusqu'à un troisième point (P2), et lequel ensemble de transformation est dimensionné de sorte que la valeur de la tension (VP0-P2) établie entre le premier point (PO) et le troisième point (P2) de l'enroulement primaire (2) est comprise dans la plage qui est définie par la tension (Vkvp), qui est appliquée à la portion principale (21), multipliée par les coefficients 1,2043 - 2 % et 1,2043 + 2 % ; La valeur de la tension (VS0-S1) entre la première extrémité (SO) et la seconde extrémité (S1) de l'enroulement secondaire (3) est comprise dans la plage qui est définie par la tension (Vkvp), multipliée par le coefficient 0,1021 - 5 % et 0,1021 + 5 % ; la valeur du courant (IPO-P1) qui passe par la portion principale (21) est comprise dans la plage qui est définie par le courant (lkas) qui passe par l'enroulement secondaire multiplié par les coefficients 0,1133 - 5 % et 0,1133 + 5 % ; la valeur du courant (IP1-P2) qui passe par la seconde portion (22) est comprise dans la plage qui est définie par le courant (lkas) multiplié par les coefficients 0,0940 - 5 % et 0,0940 + 5 % ; la valeur de l'induction magnétique ayant trait à la configuration qui est définie par le premier point (P0) et le troisième point (P2) du premier enroulement (2) et du second enroulement (3) est comprise dans la plage qui est définie par le coefficient d'induction magnétique (Ckim) pour la configuration qui est définie par la portion principale (21) et par l'enroulement secondaire (3) multiplié par les coefficients 0,9965 - 0,03 % et 0,9965 + 0,03 %.
PCT/IT2011/000274 2011-08-01 2011-08-01 Ensemble de transformation d'énergie électrique WO2013018107A1 (fr)

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PCT/IT2011/000274 WO2013018107A1 (fr) 2011-08-01 2011-08-01 Ensemble de transformation d'énergie électrique

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Application Number Priority Date Filing Date Title
PCT/IT2011/000274 WO2013018107A1 (fr) 2011-08-01 2011-08-01 Ensemble de transformation d'énergie électrique

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE599318C (de) * 1932-03-17 1934-07-29 Aeg Regelbarer Manteltransformator
US4189672A (en) * 1978-03-27 1980-02-19 Peschel Stanley G Variable transformer method and apparatus for preventing short-circuit current flow
JPS57149712A (en) * 1981-03-12 1982-09-16 Matsushita Electric Ind Co Ltd Power saving transformer
WO1997005536A1 (fr) * 1995-08-01 1997-02-13 N.V. Eneco Procede et dispositif de reglage et de regulation continus du rapport de spires d'un transformateur et transformateur pourvu d'un tel dispositif
JPH1079315A (ja) * 1996-09-02 1998-03-24 Kawamura Electric Inc 節電装置
JPH11155135A (ja) * 1997-11-20 1999-06-08 Miharu Tsushin Kk Ｃａｔｖ用電源供給装置
US6078148A (en) * 1998-10-09 2000-06-20 Relume Corporation Transformer tap switching power supply for LED traffic signal
WO2007037609A1 (fr) * 2005-09-29 2007-04-05 Jeong-Do Lim Appareil d'economie d'energie automatique a commande centralisee

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
DE599318C (de) * 1932-03-17 1934-07-29 Aeg Regelbarer Manteltransformator
US4189672A (en) * 1978-03-27 1980-02-19 Peschel Stanley G Variable transformer method and apparatus for preventing short-circuit current flow
JPS57149712A (en) * 1981-03-12 1982-09-16 Matsushita Electric Ind Co Ltd Power saving transformer
WO1997005536A1 (fr) * 1995-08-01 1997-02-13 N.V. Eneco Procede et dispositif de reglage et de regulation continus du rapport de spires d'un transformateur et transformateur pourvu d'un tel dispositif
JPH1079315A (ja) * 1996-09-02 1998-03-24 Kawamura Electric Inc 節電装置
JPH11155135A (ja) * 1997-11-20 1999-06-08 Miharu Tsushin Kk Ｃａｔｖ用電源供給装置
US6078148A (en) * 1998-10-09 2000-06-20 Relume Corporation Transformer tap switching power supply for LED traffic signal
WO2007037609A1 (fr) * 2005-09-29 2007-04-05 Jeong-Do Lim Appareil d'economie d'energie automatique a commande centralisee

Non-Patent Citations (1)

* Cited by examiner, † Cited by third party
Title
JAWAD FAIZ ET AL: "New Solid-State Onload Tap-Changers Topology for Distribution Transformers", IEEE TRANSACTIONS ON POWER DELIVERY, IEEE SERVICE CENTER, NEW YORK, NY, US, vol. 18, no. 1, 1 January 2003 (2003-01-01), XP011078911, ISSN: 0885-8977 *

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