CN106328349A - Double-secondary-winding two-stage voltage transformer - Google Patents

Double-secondary-winding two-stage voltage transformer Download PDF

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Publication number
CN106328349A
CN106328349A CN201610847398.1A CN201610847398A CN106328349A CN 106328349 A CN106328349 A CN 106328349A CN 201610847398 A CN201610847398 A CN 201610847398A CN 106328349 A CN106328349 A CN 106328349A
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China
Prior art keywords
winding
secondary winding
double
voltage transformer
stage voltage
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Application number
CN201610847398.1A
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Chinese (zh)
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CN106328349B (en
Inventor
靳绍平
李敏
李东江
刘见
单鹏
罗晓玉
杨爱超
张春强
邹文峰
陈琛
兰青
罗翀
俞琦
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.)
State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Jiangxi Electric Power Co Ltd
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State Grid Corp of China SGCC
Electric Power Research Institute of State Grid Jiangxi Electric Power Co Ltd
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Priority to CN201610847398.1A priority Critical patent/CN106328349B/en
Publication of CN106328349A publication Critical patent/CN106328349A/en
Application granted granted Critical
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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
    • H01F27/2895—Windings disposed upon ring cores
    • 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
    • H01F27/24—Magnetic cores
    • 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
    • H01F38/00—Adaptations of transformers or inductances for specific applications or functions
    • H01F38/20—Instruments transformers
    • H01F38/22—Instruments transformers for single phase ac
    • H01F38/24—Voltage transformers
    • H01F38/26—Constructions

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

Abstract

The invention discloses a double-secondary-winding two-stage voltage transformer which comprises a first-stage iron core, a second-stage iron core, a primary winding N1, a secondary winding N2, a secondary winding N3 and an exciting winding. The double-secondary-winding two-stage voltage transformer is characterized in that the first-stage iron core is wound with the exciting winding NL, the first-stage iron core and the second-stage iron core are wound with the primary winding N1, the secondary winding N2 and the secondary winding N3, the secondary winding N2 is a secondary winding with ground potential as reference potential, and the secondary winding N3 is a secondary winding with the high-voltage potential of primary voltage as reference potential. The double-secondary-winding two-stage voltage transformer meets the measurement requirement with the high-voltage potential of primary voltage as reference potential of another secondary transformation amount while meeting the measurement requirement with the ground potential as reference potential of one secondary transformation amount.

Description

A kind of biquadratic winding double-stage voltage transformer
Technical field
The present invention relates to a kind of biquadratic winding double-stage voltage transformer, belong to electric power monitoring and field of measuring techniques.
Background technology
Double-stage voltage transformer is shown in Fig. 1, has an Exciting Windings for Transverse Differential Protection and a winding, and can meet one with earth potential is With reference to the secondary voltage measurement requirement of current potential, if also need to one with the high-voltage of primary voltage for reference to current potential simultaneously During secondary voltage measurement requirement, common double-stage voltage transformer can not meet requirement.
Summary of the invention
Present invention problem to be solved is to provide a kind of biquadratic winding double-stage voltage transformer, this dual stage voltage mutual inductance Device, has an Exciting Windings for Transverse Differential Protection, a winding and two Secondary Winding, wherein, NLFor Exciting Windings for Transverse Differential Protection, N1It is a winding, N2For with earth potential for the Secondary Winding with reference to current potential, N3For with the high-voltage of primary voltage be the Secondary Winding with reference to current potential, While requiring with reference to potential measurement, another quadratic transformation amount is met with one with earth potential meeting a quadratic transformation amount The high-voltage of secondary voltage is with reference to potential measurement requirement.
The present invention uses following technical proposals to realize.A kind of biquadratic winding double-stage voltage transformer, including the first order Iron core, second level iron core, Exciting Windings for Transverse Differential Protection NLIt is wound on first order iron core, a winding N1With Secondary Winding N2, Secondary Winding N3 It is wound on first order iron core and second level iron core.
More specifically, Secondary Winding N2It is with earth potential for the Secondary Winding with reference to current potential, Secondary Winding N3For with once electricity The high-voltage of pressure is the Secondary Winding with reference to current potential.
More particularly, Exciting Windings for Transverse Differential Protection NLHot end ALWith a winding N1Hot end A connect, Exciting Windings for Transverse Differential Protection NLCold end XLWith a winding N1Cold end X connect；Secondary Winding N3Polar end 2n and a winding N1Height Potential end A connects, Secondary Winding N3Non-polar end 2a be arranged on a winding N1Hot end A side.
More particularly, Secondary Winding N3Non-polar end 2a and a winding N1The insulation distance of cold end X should not Less than a winding N1Hot end A and a winding N1The distance of cold end X.
More particularly, Secondary Winding N3Non-polar end 2a and a winding N1Hot end A between insulation distance should Not less than 2mm.
More particularly, from a winding N1Hot end A draw A terminal, from a winding N1Cold end X draw Go out X terminal, from Secondary Winding N2Non-polar end 1a draw 1a terminal, from Secondary Winding N2Polar end 1n draw 1n terminal, from Secondary Winding N3Non-polar end 2a draw 2a terminal.
Secondary Winding N of biquadratic winding double-stage voltage transformer of the present invention2With Secondary Winding N3Secondary load be Unloaded.
The invention has the beneficial effects as follows, on the basis of common double-stage voltage transformer, increase in shape secondary around Group N32a terminal, at winding N of coiling1Time, by Secondary Winding N3With a winding N1Series connection coiling, Secondary Winding N3Pole A property end 2n and winding N1Hot end A connect, and lead to the A terminal of biquadratic winding double-stage voltage transformer, this A Terminal is i.e. a winding N1Hot end A, be again Secondary Winding N3Polar end 2n；I.e. solve Secondary Winding N3With one The high-voltage of secondary voltage is the problem with reference to potential measurement secondary voltage, and the insulation solved again between two Secondary Winding is asked Topic；Can realize simultaneously one with earth potential be with reference to current potential, another is with the high-voltage of primary voltage for reference to current potential secondary Voltage measurement, have that method is simple, economic, science, practicality, workable, low cost and other advantages.
Accompanying drawing explanation
Fig. 1 is common double-stage voltage transformer schematic diagram；
Fig. 2 is common double-stage voltage transformer winding connection figure；
Fig. 3 is common double-stage voltage transformer equivalent circuit diagram；
Fig. 4 is the common main schematic diagram of double-stage voltage transformer profile；
Fig. 5 is common double-stage voltage transformer profile top view；
Fig. 6 is biquadratic winding double-stage voltage transformer schematic diagram；
Fig. 7 is biquadratic winding double-stage voltage transformer winding connection figure；
Fig. 8 is biquadratic winding double-stage voltage transformer equivalent circuit diagram；
Fig. 9 is the biquadratic winding main schematic diagram of double-stage voltage transformer profile；
Figure 10 is biquadratic winding double-stage voltage transformer profile top view；
Symbol in figure:
1----First Line iron core, 2----second level iron core；
NL----Exciting Windings for Transverse Differential Protection；
N1----winding；
N2、N3----Secondary Winding；
The hot end of winding of A----, the cold end of winding of X----；
AL---the hot end of-Exciting Windings for Transverse Differential Protection, XL---the cold end of-Exciting Windings for Transverse Differential Protection；
1a----Secondary Winding N2Non-polar end, 1n----Secondary Winding N2Polar end；
2a----Secondary Winding N3Non-polar end, 2n----Secondary Winding N3Polar end；
----primary voltage vector；
----Secondary Winding N2Voltage vector；
----Secondary Winding N3Voltage vector；
----Exciting Windings for Transverse Differential Protection NLCurrent phasor；
----winding N1Current phasor；
---an inductive electric potential vector of-first order transformer；
----N1Winding inductive electric potential vector on two iron cores；
ZL----NLThe internal impedance of winding；
Z1----N1The internal impedance of winding；
Z′2----conversion to N once2The internal impedance of winding；
Z′3----conversion to N once3The internal impedance of winding；
Yml---the excitation admittance of-first order transformer；
Ym2---the excitation admittance of-second level transformer；
----conversion to N once2Winding voltage vector；
----conversion to N once3Winding voltage vector.
Detailed description of the invention
Below in conjunction with the accompanying drawings the present invention is embodied as step to be further described.
As shown in Figure 6, described biquadratic winding double-stage voltage transformer is in routine for biquadratic winding double-stage voltage transformer In double-stage voltage transformer (see Fig. 1-5) ultimate principle, and consider manufacturing process and insulation technology factor, in coiling original Secondary winding N1With Secondary Winding N2Iron core on add another Secondary Winding N of coiling again3, Secondary Winding N2Coiling position, insulation Process and the way of output etc. the most constant (see Fig. 7)；Winding N1Insulation processing and the way of output etc. the most constant, the present invention wants Seek Secondary Winding N3With a winding N1Series connection, first coiling Secondary Winding N3Further around winding N of group1, Secondary Winding N3Polarity An end 2n and winding N1Hot end A connect, solve Secondary Winding N3With the high-voltage of primary voltage for reference to current potential Problem；According to double-stage voltage transformer ultimate principle, Exciting Windings for Transverse Differential Protection NLWith a winding N1Primary voltage equal, the circle of winding Number is equal, Exciting Windings for Transverse Differential Protection NLIt is wound on first order iron core, a winding N1With Secondary Winding N2, Secondary Winding N3It is wound on On one-level iron core and second level iron core.
Exciting Windings for Transverse Differential Protection N in the present inventionLHot end ALWith a winding N1Hot end A connect, Exciting Windings for Transverse Differential Protection NL's Cold end XLWith a winding N1Cold end X connect；Application claims Secondary Winding N3Polar end 2n and a winding N1Hot end A connect, Secondary Winding N3Non-polar end 2a be arranged on a winding N1Hot end A side (see figure 7), Secondary Winding N3Non-polar end 2a and the insulation distance of cold end X of a winding N should be not less than a winding N1's A hot end A and winding N1The distance of cold end X；Secondary Winding N3Non-polar end 2a and a winding N1Height Potential difference between potential end A is secondary voltage, mutual according to JJG314-2010 " measurement voltage ct calibrating code " voltage The maximum of sensor rated secondary voltage is 100V, therefore, Secondary Winding N3Non-polar end 2a and a winding N1High potential Between end A, insulation distance should be not less than 2mm.
Secondary Winding N of application claims biquadratic winding double-stage voltage transformer2With Secondary Winding N3Secondary load be Unloaded.
The assessment after increasing a secondary ratio winding, double-stage voltage transformer error affected, common double step voltage mutual inductance Device equivalent circuit diagram is shown in Fig. 3, and from voltage transformer ultimate principle, its no-load error is:
Derivation sees " voltage ratio standard ", Shanxi science tech publishing house, Zhao Xiumin；Zhao Yitao writes, P24～P25；
Relatively biquadratic winding double-stage voltage transformer equivalent circuit diagram is shown in Fig. 8, and the error of voltage transformer is by zero load by mistake Difference and load error superposition are constituted, owing to secondary is zero load, therefore, and the error of special biquadratic winding double-stage voltage transformer Being only no-load error, its error characteristics keep consistent with common double-stage voltage transformer.
The calculating of umber of turn:
N = U n e / T ... ( 1 )
In formula:
N is umber of turn；UnFor rated primary voltage；E is the circle electromotive force of winding；T is 1 circle.
As a example by rated primary voltage 10kV:
Embodiment 1
1, ad eundem common double-stage voltage transformer ultimate principle, manufacturing process, design technology method are maintained:
2, the identical insulant of the common double-stage voltage transformer of ad eundem, iron core, wire are used；
3, Exciting Windings for Transverse Differential Protection, a former winding, the calculating of Secondary Winding, method of winding, winding position are constant；
4, the invariant position that former winding, a Secondary Winding are arranged outside double-stage voltage transformer；
5, former ad eundem common double-stage voltage transformer profile is basically unchanged, at A terminal one 2a terminal of other increase (see figure 7, Fig. 9, Figure 10), Secondary Winding N3Non-polar end 2a and a winding N1The insulation distance of cold end X should be not less than one Secondary winding N1Hot end A and a winding N1The distance of cold end X, Secondary Winding N3Non-polar end 2a with once Winding N1Hot end A between insulation distance should be not less than 2mm.
6, Exciting Windings for Transverse Differential Protection NLWith a winding N1Primary voltage equal, the equal turn numbers of winding；
7, Exciting Windings for Transverse Differential Protection NLIt is wound on first order iron core, Exciting Windings for Transverse Differential Protection NLHot end ALWith a winding N1Height Potential end A connects, Exciting Windings for Transverse Differential Protection NLCold end XLWith a winding N1Cold end X connect；
8, at winding N of coiling1Time (see Fig. 7, Fig. 9, Figure 10), by Secondary Winding N3With a winding N1Series connection coiling On first order iron core and second level iron core, Secondary Winding N3Polar end 2n and a winding N1Hot end A connect, and Leading to the A terminal of biquadratic winding double-stage voltage transformer, this A terminal is i.e. a winding N1Hot end A, be again two Secondary winding N3Polar end 2n；
9, Secondary Winding N32a end lead to the 2a terminal of biquadratic winding double-stage voltage transformer；
10, a winding N1X end lead to the X terminal of biquadratic winding double-stage voltage transformer；
11, in former ad eundem common double-stage voltage transformer coiling Secondary Winding N2Position, coiling Secondary Winding N2, two Secondary winding N2Non-polar end 1a lead to the 1a terminal of biquadratic winding double-stage voltage transformer, Secondary Winding N2Polar end 1n draw biquadratic winding double-stage voltage transformer 1n terminal；
The content not being described in detail in description of the invention belongs to the known technology of professional and technical personnel in the field.Use Biquadratic winding double-stage voltage transformer replaces common double-stage voltage transformer, is meeting one with earth potential for reference to current potential While secondary voltage measurement requirement, also meet the secondary voltage that is reference current potential with the high-voltage of primary voltage and measure Requirement.

Claims (8)

1. a biquadratic winding double-stage voltage transformer, including first order iron core, second level iron core, a winding N1, secondary around Group N2, Secondary Winding N3, Exciting Windings for Transverse Differential Protection；It is characterized in that: Exciting Windings for Transverse Differential Protection NLIt is wound on first order iron core, a winding N1With Secondary Winding N2, Secondary Winding N3It is wound on first order iron core and second level iron core.
Biquadratic winding double-stage voltage transformer the most according to claim 1, it is characterised in that: Secondary Winding N2It is with ground Current potential is the Secondary Winding with reference to current potential, Secondary Winding N3For with the high-voltage of primary voltage be the secondary with reference to current potential around Group.
Biquadratic winding double-stage voltage transformer the most according to claim 1, it is characterised in that: Exciting Windings for Transverse Differential Protection NLHigh electricity Position end ALWith a winding N1Hot end A connect, Exciting Windings for Transverse Differential Protection NLCold end XLWith a winding N1Cold end X Connect；Secondary Winding N3Polar end 2n and a winding N1Hot end A connect, Secondary Winding N3Non-polar end 2a set Put at a winding N1Hot end A side.
4. the biquadratic winding double-stage voltage transformer stated according to claim 3, it is characterised in that: Secondary Winding N3Nonpolar An end 2a and winding N1The insulation distance of cold end X should be not less than a winding N1Hot end A and a winding N1 The distance of cold end X.
5. the biquadratic winding double-stage voltage transformer stated according to claim 4, it is characterised in that: Secondary Winding N3Nonpolar An end 2a and winding N1Hot end A between insulation distance should be not less than 2mm.
6. the biquadratic winding double-stage voltage transformer stated according to claim 3, it is characterised in that: from a winding N1High electricity Position end A draws A terminal, from a winding N1Cold end X draw X terminal, from Secondary Winding N2Non-polar end 1a draw 1a Terminal, from Secondary Winding N2Polar end 1n draw 1n terminal, from Secondary Winding N3Non-polar end 2a draw 2a terminal.
Biquadratic winding double-stage voltage transformer the most according to claim 1, it is characterised in that: Secondary Winding N2And secondary Winding N3Secondary load be unloaded.
Biquadratic winding double-stage voltage transformer the most according to claim 1, it is characterised in that: Exciting Windings for Transverse Differential Protection NLOnce Winding N1Primary voltage equal, the equal turn numbers of winding.
CN201610847398.1A 2016-09-23 2016-09-23 A kind of biquadratic winding double-stage voltage transformer Active CN106328349B (en)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107424814A (en) * 2017-07-27 2017-12-01 中国电力科学研究院 A kind of high-low pressure composite excitation double-stage voltage transformer and its calibration method
CN107765057A (en) * 2017-09-26 2018-03-06 李颖 A kind of improved two-stage current transformer
CN109065343A (en) * 2018-07-10 2018-12-21 中国电力科学研究院有限公司 A kind of high-pressure double-stage voltage transformer
WO2021088200A1 (en) * 2019-11-05 2021-05-14 中国电力科学研究院有限公司 Dual-stage magnetic excitation high-voltage proportional standard apparatus and error compensation method

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CN85100872A (en) * 1985-04-01 1986-08-27 山西省机械设计研究所 The low-voltage high-precision voltage transformer of stepup transformer compensation
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JPH11337590A (en) * 1998-05-28 1999-12-10 Tempearl Ind Co Ltd Direct current detecting device
CN103267958A (en) * 2013-04-27 2013-08-28 广东电网公司电力科学研究院 Circuit and method for measuring voltage transformer voltage coefficient
CN103337355A (en) * 2013-07-09 2013-10-02 河北申科电子股份有限公司 Zero-magnetic flux current transformer capable of preventing electricity from being stolen through high-intensity magnetic field
CN104505243A (en) * 2014-09-22 2015-04-08 秦喜昌 Development and application of 0.001-grade high-voltage and high-accuracy double pole voltage transformer
CN206210546U (en) * 2016-09-23 2017-05-31 国网江西省电力公司电力科学研究院 A kind of biquadratic winding double-stage voltage transformer

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Publication number Priority date Publication date Assignee Title
CN85100872A (en) * 1985-04-01 1986-08-27 山西省机械设计研究所 The low-voltage high-precision voltage transformer of stepup transformer compensation
CN2143356Y (en) * 1992-12-01 1993-10-06 江西省电力试验研究所 Voltage mutual inductor for instruments
JPH11337590A (en) * 1998-05-28 1999-12-10 Tempearl Ind Co Ltd Direct current detecting device
CN103267958A (en) * 2013-04-27 2013-08-28 广东电网公司电力科学研究院 Circuit and method for measuring voltage transformer voltage coefficient
CN103337355A (en) * 2013-07-09 2013-10-02 河北申科电子股份有限公司 Zero-magnetic flux current transformer capable of preventing electricity from being stolen through high-intensity magnetic field
CN104505243A (en) * 2014-09-22 2015-04-08 秦喜昌 Development and application of 0.001-grade high-voltage and high-accuracy double pole voltage transformer
CN206210546U (en) * 2016-09-23 2017-05-31 国网江西省电力公司电力科学研究院 A kind of biquadratic winding double-stage voltage transformer

Cited By (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN107424814A (en) * 2017-07-27 2017-12-01 中国电力科学研究院 A kind of high-low pressure composite excitation double-stage voltage transformer and its calibration method
CN107424814B (en) * 2017-07-27 2020-02-07 中国电力科学研究院 High-low voltage hybrid excitation two-stage voltage transformer and calibration method thereof
CN107765057A (en) * 2017-09-26 2018-03-06 李颖 A kind of improved two-stage current transformer
CN109065343A (en) * 2018-07-10 2018-12-21 中国电力科学研究院有限公司 A kind of high-pressure double-stage voltage transformer
WO2021088200A1 (en) * 2019-11-05 2021-05-14 中国电力科学研究院有限公司 Dual-stage magnetic excitation high-voltage proportional standard apparatus and error compensation method

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