WO2023087435A1 - Doublage de transformateur de mise à la terre amélioré en tant que transformateur de station - Google Patents

Doublage de transformateur de mise à la terre amélioré en tant que transformateur de station Download PDF

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Publication number
WO2023087435A1
WO2023087435A1 PCT/CN2021/136751 CN2021136751W WO2023087435A1 WO 2023087435 A1 WO2023087435 A1 WO 2023087435A1 CN 2021136751 W CN2021136751 W CN 2021136751W WO 2023087435 A1 WO2023087435 A1 WO 2023087435A1
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WIPO (PCT)
Prior art keywords
primary side
transformer
winding
grounding transformer
windings
Prior art date
Application number
PCT/CN2021/136751
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English (en)
Chinese (zh)
Inventor
盛建科
盛亮科
詹柏青
罗万里
李小锋
刘湘
王正云
Original Assignee
广东福德电子有限公司
株洲福德轨道交通研究院有限公司
湖南福德电气有限公司
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Application filed by 广东福德电子有限公司, 株洲福德轨道交通研究院有限公司, 湖南福德电气有限公司 filed Critical 广东福德电子有限公司
Publication of WO2023087435A1 publication Critical patent/WO2023087435A1/fr

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    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/30—Fastening or clamping coils, windings, or parts thereof together; Fastening or mounting coils or windings on core, casing, or other support
    • H01F27/306—Fastening or mounting coils or windings on core, casing or other support
    • 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
    • H01F27/28—Coils; Windings; Conductive connections
    • H01F27/29—Terminals; Tapping arrangements for signal inductances
    • 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
    • H01F27/42—Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils

Definitions

  • the invention relates to the field of transformers, in particular to an improved grounding transformer which doubles as a substation transformer.
  • the grounding transformer of this structure doubles as a substation transformer. There is only one winding on the secondary side of each core column.
  • the output phase voltage and the phase voltage vector of the primary side will differ by 30 degrees in electrical angle, which cannot reach the low-voltage output phase voltage vector.
  • the phase voltage vector of the grid voltage on the high voltage input side in phase with each other.
  • the grounding transformer of this structure doubles as a substation transformer. There is only one winding on the secondary side of each core column.
  • the output phase voltage and the phase voltage vector of the primary side will differ by 30 degrees in electrical angle, which cannot reach the low-voltage output phase voltage vector.
  • the phase voltage vector of the grid voltage on the high voltage input side in phase with each other.
  • the invention provides an improved grounding transformer which doubles as a substation transformer, which can achieve low-voltage output phase voltage vector The phase voltage vector of the grid voltage on the high voltage input side in phase with each other.
  • an improved grounding transformer that doubles as a substation transformer, including:
  • the primary side of the grounding transformer has six primary side windings A1, A2, B1, B2, C1, and C2 wound on the three-phase iron core, wherein two of the primary side windings are distributed on each core leg of the three-phase iron core, And the number of turns of the two primary side windings is equal;
  • the six primary side windings are connected in a Z-type connection
  • the topological structure of the secondary side of the grounding transformer is the same as that of the primary side of the grounding transformer, and the two are symmetrical to each other.
  • the wiring method of the primary side of the grounding transformer further includes:
  • the end of the primary winding A1 is connected to the end of the primary winding C2;
  • the end of the primary side winding B1 is connected to the end of the primary side winding A2;
  • the end of the primary side winding C1 is connected to the end of the primary side winding B2;
  • the first ends of the primary side windings A2, B2, and C2 are connected to form a neutral point N of the ground transformer;
  • the first ends of the primary side windings A1, B1, and C1 are connected to the three-phase distribution network;
  • the end with the same name is the first end of the winding, and the other end is the end of the winding.
  • the wiring method of the primary side of the grounding transformer further includes:
  • the neutral point N is grounded through an arc suppressing coil.
  • the secondary side of the grounding transformer has six secondary side windings A3, A4, B3, B4, C3, and C4 wound on the three-phase iron core, wherein each iron core column of the three-phase iron core Distributing two secondary side windings, and the number of turns of the two secondary side windings is equal;
  • the six secondary side windings are also connected in a Z-connection manner.
  • the wiring method of the secondary side of the grounding transformer further includes:
  • the end of the secondary winding A4 is connected to the end of the secondary winding C3;
  • the end of the secondary winding B4 is connected to the end of the secondary winding A3;
  • the end of the secondary winding C4 is connected to the end of the secondary winding B3;
  • the first ends of the secondary side windings A3, B3, and C3 are connected to form a neutral point n of the ground transformer;
  • the first ends of the secondary side windings A4, B4, and C4 serve as low-voltage three-phase output ends.
  • the number of turns Np of each primary side winding is equal, and
  • the number of turns Ns of each secondary winding is equal.
  • the improved grounding transformer which also serves as a substation transformer provided by the present invention is improved on the basis of the traditional grounding transformer, and can realize low-voltage output phase voltage vector The phase voltage vector of the grid voltage on the high voltage input side in phase with each other.
  • Figure 1 is a circuit topology diagram of an improved grounding transformer that doubles as a traditional substation transformer
  • Fig. 2 is the structure schematic diagram of the improved grounding transformer double as the substation of the present invention
  • Fig. 3 is the circuit topological diagram of the improved grounding transformer which doubles as a substation transformer of the present invention.
  • FIG. 2 it is a structural schematic diagram of the improved grounding transformer which doubles as a substation transformer in this embodiment. Its circuit topology is shown in Fig. 3, including a three-phase iron core, a secondary side of the grounding transformer, and a primary side of the grounding transformer.
  • the primary side of the grounding transformer is set to be composed of six primary side windings A1, A2, B1, B2, C1, and C2 wound on a three-phase iron core in order to lead out the neutral point N of the distribution network, wherein the three-phase Two primary side windings are distributed on each core column of the iron core, and the number of turns of the two primary side windings is equal.
  • the primary side of the A-phase core legs of the three-phase core is distributed A1, A2 from top to bottom, and the number of turns of A1 and A2 is equal.
  • the B-phase core legs are distributed with B1 and B2, and the C-phase core legs are distributed with C1 and C2.
  • the reverse polarity of the primary side windings A1, A2, B1, B2, C1, and C2 are connected in series to form a star winding, that is, the wiring is performed in a Z-connection manner.
  • the wiring method of the primary side of the grounding transformer is further Set as:
  • the end of the primary winding A1 is connected to the end of the primary winding C2;
  • the end of the primary side winding B1 is connected to the end of the primary side winding A2;
  • the end of the primary side winding C1 is connected to the end of the primary side winding B2;
  • the first ends of the primary side windings A2, B2, and C2 are connected to form a neutral point N of the ground transformer;
  • the first ends of the primary side windings A1, B1 and C1 are connected to the three-phase power distribution network.
  • the origin next to the winding is used to represent the end with the same name, and the end with the same name is the first end of the winding, and the other end is called the end.
  • the topological structure of the secondary side of the grounding transformer is set to be the same as that of the primary side of the grounding transformer, and the two are symmetrical to each other .
  • the secondary side of the grounding transformer is composed of six secondary side windings A3, A4, B3, B4, C3, and C4 wound on a three-phase iron core, where two The above-mentioned secondary side windings, and the number of turns of the two secondary side windings is equal.
  • the secondary side of the A-phase core leg of the three-phase core is distributed A3, A4 from top to bottom, and the number of turns of A3 and A4 is equal.
  • the B-phase core leg is distributed with B3 and B4, and the C-phase core leg is distributed with C3 and C4.
  • A3, A4, B3, B4, C3, and C4 are also connected in series in reverse polarity to form a star winding, that is, the wiring is performed in a Z-connection manner.
  • the wiring on the secondary side of the grounding transformer The method is further set to:
  • the end of the secondary winding A4 is connected to the end of the secondary winding C3;
  • the end of the secondary winding B4 is connected to the end of the secondary winding A3;
  • the end of the secondary winding C4 is connected to the end of the secondary winding B3;
  • the first ends of the secondary side windings A3, B3, and C3 are connected to form a neutral point n of the ground transformer;
  • the first ends of the secondary side windings A4, B4, and C4 serve as low-voltage three-phase output ends.
  • the improved grounding transformer that doubles as a substation transformer provided in this embodiment is improved on the basis of the traditional grounding transformer, and can realize low-voltage output phase voltage vector The phase voltage vector of the grid voltage on the high voltage input side in phase with each other.
  • connection mode of the primary side of the grounding transformer is further set such that the neutral point N is grounded through an arc suppressing coil, which is used to compensate most of the capacitive reactive power flowing through the ground fault point. current.
  • the number of turns Np of each of the primary side windings is set to be equal, and the number of turns of each of the secondary side windings Ns is equal, so that the station provided by this embodiment also serves as a station.
  • the modified improved grounding transformer forms a fully symmetrical structure, which can improve the reliability and stability of the grounding transformer.
  • the number of turns of each winding on the primary side is Np
  • the number of turns on the low-voltage output side is Ns
  • the turns ratio k Np/Ns, according to the wiring in Figure 2 and Figure 3 and the relationship between the same name end of the winding , ignoring the influence of leakage inductance, the following vector relationship can be obtained:
  • the output phase voltage of the secondary side corresponds to the same phase as that of the primary side, and its amplitude is 1/k times that of the corresponding phase of the primary side.
  • any reference signs placed between parentheses shall not be construed as limiting the claim.
  • the word “comprising” does not exclude the presence of elements or steps not listed in a claim.
  • the word “a” or “an” preceding an element does not exclude the presence of a plurality of such elements.
  • the invention can be implemented by means of hardware comprising several distinct elements, and by means of a suitably programmed computer. In a unit claim enumerating several means, several of these means can be embodied by one and the same item of hardware.
  • the use of the words first, second, and third, etc. does not indicate any order. These words can be interpreted as names.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Coils Of Transformers For General Uses (AREA)

Abstract

La présente invention concerne un doublage de transformateur de mise à la terre amélioré en tant que transformateur de station, comprenant : un côté secondaire de transformateur de mise à la terre ; et un côté primaire de transformateur de mise à la terre comprenant six enroulements côté primaire A1, A2, B1, B2, C1 et C2 qui sont enroulés sur un noyau triphasé. Deux des enroulements côté primaire sont répartis sur chaque colonne centrale du noyau triphasé, et les deux enroulements côté primaire ont un nombre égal de tours ; les six enroulements latéraux primaires sont câblés selon un mode de connexion en Z ; la structure topologique du côté secondaire du transformateur de mise à la terre et la structure topologique du côté primaire du transformateur de mise à la terre sont identiques et sont symétriques l'une par rapport à l'autre. Selon la présente invention, les formules I, II, et III de vecteurs de tension de phase de sortie basse tension peuvent être successivement en phase avec les formules IV, V et VI de vecteurs de tension de phase de tension de réseau électrique côté entrée haute tension, respectivement.
PCT/CN2021/136751 2021-11-19 2021-12-09 Doublage de transformateur de mise à la terre amélioré en tant que transformateur de station WO2023087435A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202111408952.3A CN114068156A (zh) 2021-11-19 2021-11-19 一种兼作站用变的改进型接地变压器
CN202111408952.3 2021-11-19

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WO2023087435A1 true WO2023087435A1 (fr) 2023-05-25

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Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB595166A (en) * 1945-06-06 1947-11-27 Foster Transformers & Switchge Improvements in electric transformers
CN201504101U (zh) * 2009-08-10 2010-06-09 李长益 一体化接地变消弧线圈装置
CN102169749A (zh) * 2011-01-26 2011-08-31 中电电气(江苏)股份有限公司 低零序阻抗缓谐波节能变压器
CN104361982A (zh) * 2014-10-24 2015-02-18 南京航空航天大学 一种12脉波自耦移相整流变压器
CN105807137A (zh) * 2014-12-29 2016-07-27 国家电网公司 一种接地变压器阻抗确定方法
WO2021169643A1 (fr) * 2020-02-26 2021-09-02 安徽一天电气技术股份有限公司 Système et procédé d'extinction d'arc

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH06310349A (ja) * 1993-04-22 1994-11-04 Daihen Corp ３相変圧器
CN103632816A (zh) * 2012-08-22 2014-03-12 重庆市帝迅电气科技有限公司 高耐雷电力变压器及含有其的干式、油浸式电力变压器
CN202977126U (zh) * 2012-11-09 2013-06-05 浙江科润电力设备有限公司 一种消除谐波的电力变压器绕组结构

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
GB595166A (en) * 1945-06-06 1947-11-27 Foster Transformers & Switchge Improvements in electric transformers
CN201504101U (zh) * 2009-08-10 2010-06-09 李长益 一体化接地变消弧线圈装置
CN102169749A (zh) * 2011-01-26 2011-08-31 中电电气(江苏)股份有限公司 低零序阻抗缓谐波节能变压器
CN104361982A (zh) * 2014-10-24 2015-02-18 南京航空航天大学 一种12脉波自耦移相整流变压器
CN105807137A (zh) * 2014-12-29 2016-07-27 国家电网公司 一种接地变压器阻抗确定方法
WO2021169643A1 (fr) * 2020-02-26 2021-09-02 安徽一天电气技术股份有限公司 Système et procédé d'extinction d'arc

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