CN104465053B - A kind of high-capacity three-phase combination type phase-shifting transformer - Google Patents

A kind of high-capacity three-phase combination type phase-shifting transformer Download PDF

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Publication number
CN104465053B
CN104465053B CN201410744863.XA CN201410744863A CN104465053B CN 104465053 B CN104465053 B CN 104465053B CN 201410744863 A CN201410744863 A CN 201410744863A CN 104465053 B CN104465053 B CN 104465053B
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China
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phase
coil
transformer
series
fuel tank
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CN201410744863.XA
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CN104465053A (en
Inventor
张志强
张立国
杨同勋
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State Grid Anhui Electric Power Co Ltd
Shandong Power Equipment Co Ltd
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Shandong Power Equipment Co Ltd
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Priority to CN201410744863.XA priority Critical patent/CN104465053B/en
Publication of CN104465053A publication Critical patent/CN104465053A/en
Priority to EP15868363.1A priority patent/EP3232452B1/en
Priority to PCT/CN2015/096443 priority patent/WO2016091123A1/en
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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
    • H01F27/42—Circuits specially adapted for the purpose of modifying, or compensating for, electric characteristics of transformers, reactors, or choke coils
    • 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
    • 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
    • H01F27/40—Structural association with built-in electric component, e.g. fuse
    • 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
    • H—ELECTRICITY
    • H01—ELECTRIC ELEMENTS
    • H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
    • H01F30/00—Fixed transformers not covered by group H01F19/00
    • H01F30/06—Fixed transformers not covered by group H01F19/00 characterised by the structure
    • H01F30/12—Two-phase, three-phase or polyphase transformers
    • 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
    • H01F29/14—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias
    • H01F2029/143—Variable transformers or inductances not covered by group H01F21/00 with variable magnetic bias with control winding for generating magnetic bias

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Housings And Mounting Of Transformers (AREA)
  • Control Of Electrical Variables (AREA)

Abstract

The present invention relates to a kind of high-capacity three-phase combination type phase-shifting transformer, including three single-phase transformers, respectively as A, B, C three-phase is combined into three-phase transformer, every single-phase transformer includes series transformer and exciting transformer, both are placed in same fuel tank and are divided into two independent device body parts, the transformator that is often in series includes series coil and magnet exciting coil, exciting transformer includes pressure regulation magnet exciting coil and voltage regulation coil, the head end of pressure regulation magnet exciting coil is connected with the centre cap of series coil in the series transformer of homophase, end is that neutral point draws fuel tank, the head end of voltage regulation coil is drawn fuel tank and is connected with the dihedral node of remaining two magnet exciting coil, end draws fuel tank as neutral point.Present configuration is simple, can reduce the electric pressure of shunting switch, also can simplify the attachment structure between each device body, reduces installation difficulty, has stronger practicality in the phase-shifting transformer of Large Copacity and voltage levels.

Description

A kind of high-capacity three-phase combination type phase-shifting transformer
Technical field
The present invention relates to a kind of phase-shifting transformer, be specifically related to a kind of high-capacity three-phase combination type phase-shifting transformer.
Background technology
Phase-shifting transformer is inputted by adjustment and phase contrast between output voltage, makes Operation of Electric Systems more stability and high efficiency.The ultimate principle of phase-shifting transformer phase shift is one voltage of generation between mains side and load-side, this voltage and mains side voltage have certain phase angle difference, and virtual value size can adjust, and it is load side voltage with mains side voltage superposition, makes between mains side and load side voltage, to produce phase place change.The most conventional phase-shifting transformer includes holocentric formula and two kinds of basic structures of diplocardia formula.The ultimate principle of holocentric formula phase-shifting transformer is a part for a phase voltage to be connected with another, the most relatively simple for structure, but its voltage regulation coil is positioned at circuit head end, shunting switch electric pressure is higher and directly bears the various overvoltage in operation of power networks and overcurrent, is not therefore suitable for voltage levels and Large Copacity condition.Double heart type structures are dimerous by series transformer and exciting transformer, and these two parts are contained on two independent iron cores, and are attached separately in two independent oil tank of transformer.Exciting transformer is often made up of pressure regulation magnet exciting coil and voltage regulation coil, and joint group is Y/Y, and pressure regulation magnet exciting coil provides excitation for exciting transformer, and each tap of voltage regulation coil is received on load ratio bridging switch, and load ratio bridging switch is with positive and negative change over selector.Diplocardia formula phase-shifting transformer is complicated with holocentric formula structure compared, but its shunting switch electric pressure is relatively low, therefore the occasion of Large Copacity and voltage levels it is applicable to, but connecting lead wire dielectric level is on close level with line insulation in the attachment structure between two fuel tanks of series transformer and exciting transformer, therefore attachment structure is more complicated, and the installation difficulty of two fuel tanks is the highest.
Summary of the invention
For the problems referred to above, the present invention proposes a kind of high-capacity three-phase combination type phase-shifting transformer, the purpose that diplocardia formula phase-shifting transformer reduces the electric pressure of shunting switch can be reached, the attachment structure between each several part can be simplified again simultaneously, reduce technical difficulty, it is adaptable to higher voltage grade and the occasion of more capacity.
For solving the problems referred to above, the technical scheme that the present invention takes is: a kind of high-capacity three-phase combination type phase-shifting transformer, including three single-phase transformers, respectively as A, B, C three-phase is combined into three-phase transformer, every single-phase transformer includes series transformer and exciting transformer, both are placed in same fuel tank and are divided into two independent device body parts, the transformator that is often in series includes series coil and magnet exciting coil, wherein the head end of series coil and end are respectively as mains side input terminal and load-side lead-out terminal, the head of magnet exciting coil, end all draws fuel tank, when three-phase is operated together, three-phase series coil head joining distal ends is linked to be dihedral, three phase excitation coil head joining distal ends is linked to be dihedral；Exciting transformer includes pressure regulation magnet exciting coil and voltage regulation coil, the head end of pressure regulation magnet exciting coil is connected with the centre cap of series coil in the series transformer of homophase, end is that neutral point draws fuel tank, the head end of voltage regulation coil is drawn fuel tank and is connected with the dihedral node of remaining two-phase excitation coil, end draws fuel tank as neutral point, when three-phase is operated together, three phase voltage regulating magnet exciting coil is Y-connection, and three phase voltage regulating coil is Y-connection.A, B, C three-phase is respectively placed in three different fuel tanks by three phase combined phase-shifting transformer, size and the weight of single transformer can be reduced, it is readily transported and installs, therefore it is applicable under higher voltage grade and more capacity occasion, the head end of pressure regulation magnet exciting coil is connected in same fuel tank with homophase series coil is centre tapped simultaneously, it is not necessary to be connected by special attachment structure, without drawing fuel tank, structure the most herein is greatly simplified, and reduces technical difficulty.Each line end is drawn by sleeve pipe, can use the materials such as cable to realize being flexible coupling between three-phase, and in-site installation operation, test and operation maintenance are the easiest.
First and end at described series coil is mounted on current-limiting reactor, for alleviating the impact to phase-shifting transformer of the electrical network short circuit currents.
It is in series with current-limiting reactor in described voltage regulation coil.When phase-shifting transformer capacity is bigger, multiple series coil is used to connect, multiple magnet exciting coils are in parallel, multiple pressure regulation magnet exciting coils are in parallel, the structure of multiple voltage regulation coils series connection, owing in voltage regulation coil, electric current is excessive, therefore uses multiple stage load ratio bridging switch, in every voltage regulation coil branch road, now seal in current-limiting reactor electric current distribution in balancing branch, and limit the damage that load ratio bridging switch is caused by issuable short circuit current.
Present configuration is simple, can reduce the electric pressure of shunting switch, also can simplify the attachment structure between each device body, reduces installation difficulty, has stronger practicality in the phase-shifting transformer of Large Copacity and voltage levels.
Accompanying drawing explanation
Fig. 1 is the single-phase elementary diagram of embodiment one；
Fig. 2 is embodiment one elementary diagram；
Fig. 3 is phase-shift theory figure of the present invention；
Fig. 4 is the single-phase elementary diagram of embodiment two；
Fig. 5 is the single-phase elementary diagram of embodiment three；
In figure, 1, series transformer, 2, exciting transformer, SVA-SVC respectively A phase, B phase, C are in series coil, SVA1, SVA2 are that A is in series two coils of coil, EVA-EVC is respectively A phase, B phase, C phase excitation coil, EVA1, EVA2 are two coils of A phase excitation coil, TVA-TVC is respectively A phase, B phase, C phase voltage regulation coil, TVA1, TVA2 are two coils of A phase voltage regulation coil, TEVA-TEVC is respectively A phase, B phase, C phase pressure regulation magnet exciting coil, and TEVA1, TEVA2 are two coils of A phase pressure regulation magnet exciting coil, L1-L2, reactor.
Detailed description of the invention
Embodiment one
A kind of high-capacity three-phase combination type phase-shifting transformer, including three single-phase transformers, being combined into three-phase transformer respectively as A, B, C three-phase, every single-phase transformer includes series transformer 1 and exciting transformer 2, and both are placed in same fuel tank and are divided into two independent device body parts.As shown in Figure 1, as a example by A phase, series transformer 1 includes series coil SVA and magnet exciting coil EVA, draw four terminals: series coil head end SA and series coil end LA is respectively as mains side input terminal and load-side lead-out terminal, the head end sa of magnet exciting coil, magnet exciting coil end la all draws fuel tank, exciting transformer 2 includes pressure regulation magnet exciting coil TEVA and voltage regulation coil TVA, the head end ta of pressure regulation magnet exciting coil is connected with the centre cap of series coil SVA in the series transformer 1 of homophase, end is that neutral point draws fuel tank, voltage regulation coil head end TA draws fuel tank, end draws fuel tank as neutral point.B phase, C phase are identical with A phase structure.During as in figure 2 it is shown, three-phase is operated together, three-phase series coil SVA-SVC head joining distal ends is linked to be dihedral, and three phase excitation coil EVA-EVC head joining distal ends is linked to be dihedral；Three phase voltage regulating magnet exciting coil TEVA-TEVC is Y-connection, and three phase voltage regulating coil TVA-TVC is Y-connection.The magnet exciting coil EVA-EVC head joining distal ends of three-phase is linked to be dihedral, the dihedral node that every two are connected is connected with the voltage regulation coil head end of third phase, and adjust voltage regulation coil by load ratio bridging switch and seal in voltage swing and the polarity that the number of turn of circuit changes in voltage regulation coil, phase-shift theory is as shown in Figure 3, this voltage is series transformer unshakable in one's determination provides excitation, make series transformer produces on the magnet exciting coil of corner connection one advanced or lag behind the voltage of pressure regulation magnet exciting coil voltage 90 ° of homophase exciting transformer.This voltage senses the voltage Δ U produced with homophase pressure regulation magnet exciting coil phase contrast is 90 ° in corresponding series coil1With Δ U2, the two voltage makes the mains side voltage U of phase-shifting transformerSAWith load side voltage ULABetween produce the change of a phase angle, and output voltage size is identical with input voltage size, it is achieved the change of phase angle between mains side and load side voltage, by the position of regulation tap switch, it is achieved this phase contrast size and advanced or delayed between regulation.
Embodiment two
A kind of high-capacity three-phase combination type phase-shifting transformer, as shown in Figure 4, being mounted on for alleviating electrical network short circuit currents current-limiting reactor L1, L2 to the impact of phase-shifting transformer at described series coil head end SA and series coil end LA, other structures are identical with embodiment one.
Embodiment three
A kind of high-capacity three-phase combination type phase-shifting transformer, as shown in Figure 5, owing to phase-shifting transformer capacity is bigger, use two series coil SVA1, SVA2 connects, two magnet exciting coil EVA1, EVA2 is in parallel, two pressure regulation magnet exciting coil TEVA1, TEVA2 is in parallel, two voltage regulation coil TVA1, the structure of TVA2 series connection, owing in voltage regulation coil, electric current is excessive, therefore three load ratio bridging switches are used, in three branch roads, seal in electric current in three branch roads of balance distribute and limit the current-limiting reactor L1 of the damage that load ratio bridging switch is caused by issuable short circuit current, L2, other structures are identical with embodiment one.

Claims (3)

1. a high-capacity three-phase combination type phase-shifting transformer, it is characterized in that: include three single-phase transformers, respectively as A, B, C three-phase is combined into three-phase transformer, every single-phase transformer includes series transformer and exciting transformer, both are placed in same fuel tank and are divided into two independent device body parts, the transformator that is often in series includes series coil and magnet exciting coil, wherein the head end of series coil and end are respectively as mains side input terminal and load-side lead-out terminal, the head of magnet exciting coil, end all draws fuel tank, when three-phase is operated together, three-phase series coil head joining distal ends is linked to be dihedral, three phase excitation coil head joining distal ends is linked to be dihedral；Exciting transformer includes pressure regulation magnet exciting coil and voltage regulation coil, the head end of pressure regulation magnet exciting coil is connected with the centre cap of series coil in the series transformer of homophase, end is that neutral point draws fuel tank, the head end of voltage regulation coil is drawn fuel tank and is connected with the dihedral node of remaining two-phase excitation coil, end draws fuel tank as neutral point, when three-phase is operated together, three phase voltage regulating magnet exciting coil is Y-connection, and three phase voltage regulating coil is Y-connection.
High-capacity three-phase combination type phase-shifting transformer the most according to claim 1, it is characterised in that: the first and end at described series coil is mounted on current-limiting reactor.
High-capacity three-phase combination type phase-shifting transformer the most according to claim 1, it is characterised in that: in described voltage regulation coil, it is in series with current-limiting reactor.
CN201410744863.XA 2014-12-09 2014-12-09 A kind of high-capacity three-phase combination type phase-shifting transformer Active CN104465053B (en)

Priority Applications (3)

Application Number Priority Date Filing Date Title
CN201410744863.XA CN104465053B (en) 2014-12-09 2014-12-09 A kind of high-capacity three-phase combination type phase-shifting transformer
EP15868363.1A EP3232452B1 (en) 2014-12-09 2015-12-04 High-capacity three-phase combined type phase-shift transformer
PCT/CN2015/096443 WO2016091123A1 (en) 2014-12-09 2015-12-04 High-capacity three-phase combined type phase-shift transformer

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CN104465053B (en) * 2014-12-09 2016-08-03 山东电力设备有限公司 A kind of high-capacity three-phase combination type phase-shifting transformer
CN106053921B (en) * 2016-08-02 2019-08-27 中国电力科学研究院 A kind of step voltage calculation method under symmetrical twin-core phase-shifting transformer loading condition
CN107968576A (en) * 2017-12-27 2018-04-27 国网宁夏电力有限公司检修公司 A kind of phased high current source generator device
EP3937198A1 (en) * 2020-07-06 2022-01-12 General Electric Technology GmbH Power transformer assembly
CN113077977A (en) * 2021-04-13 2021-07-06 保定天威保变电气股份有限公司 Novel high-capacity single-body high-impedance symmetrical voltage-regulating phase-shift phase transformer with additional reactor
CN113077978A (en) * 2021-04-13 2021-07-06 保定天威保变电气股份有限公司 Novel voltage-regulating phase-shifting transformer with high-capacity double-device height impedance and additional reactor
CN113283204B (en) * 2021-05-19 2022-09-30 广东电网有限责任公司 Electromagnetic transient modeling method and system for on-load voltage regulation controller
CN113611513A (en) * 2021-07-23 2021-11-05 保定天威保变电气股份有限公司 Phase modulation transformer with large phase shift angle
CN216672848U (en) * 2021-12-01 2022-06-03 日立能源瑞士股份公司 Converter system, rectifying station and inverter station for direct current transmission

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CN204215878U (en) * 2014-12-09 2015-03-18 山东电力设备有限公司 A kind of high-capacity three-phase composite type phase shifting transformer

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Publication number Priority date Publication date Assignee Title
JPS6328015A (en) * 1986-07-22 1988-02-05 Mitsubishi Electric Corp Autotransformer
CN2484625Y (en) * 2001-06-01 2002-04-03 沈阳沈变中型变压器有限责任公司 Voltage-regulating transformer
CN101354957A (en) * 2008-05-28 2009-01-28 保定天威集团有限公司 Large-capacity double-body pressure-regulating phase-shifting transformator
CN101692398B (en) * 2009-10-29 2012-06-27 保定天威集团有限公司 High-voltage booster transformer
CN201829327U (en) * 2010-06-30 2011-05-11 特变电工沈阳变压器集团有限公司 Double body structure generator step-up transformer
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CN204215878U (en) * 2014-12-09 2015-03-18 山东电力设备有限公司 A kind of high-capacity three-phase composite type phase shifting transformer

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Publication number Publication date
EP3232452A1 (en) 2017-10-18
EP3232452B1 (en) 2020-05-20
EP3232452A4 (en) 2018-01-31
WO2016091123A1 (en) 2016-06-16
CN104465053A (en) 2015-03-25

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Inventor after: Zhang Liguo

Inventor after: Zhang Zhiqiang

Inventor after: Yang Tongxun

Inventor after: Zhao Xiaochun

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Patentee before: Shandong Power Equipment Company