CN106783098A - Three-phase electricity magnetic-type resonance free voltage transformer wiring group - Google Patents
Three-phase electricity magnetic-type resonance free voltage transformer wiring group Download PDFInfo
- Publication number
- CN106783098A CN106783098A CN201710121882.0A CN201710121882A CN106783098A CN 106783098 A CN106783098 A CN 106783098A CN 201710121882 A CN201710121882 A CN 201710121882A CN 106783098 A CN106783098 A CN 106783098A
- Authority
- CN
- China
- Prior art keywords
- coils
- wiring
- phases
- voltage transformer
- loop
- 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.)
- Pending
Links
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
- H01F27/34—Special means for preventing or reducing unwanted electric or magnetic effects, e.g. no-load losses, reactive currents, harmonics, oscillations, leakage fields
- H01F27/38—Auxiliary core members; Auxiliary coils or windings
-
- 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
- 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
Abstract
A kind of three-phase electricity magnetic-type resonance free voltage transformer wiring group, including a three-phase coil, secondary side measurement loop, secondary side measurement protective loop, secondary side residual voltage loop increases b in the wiring of falling V in the secondary measurement loop1N windings, balance threephase load；Wiring group is：Three-phase coil wiring：The A termination A phases of AB coils, the x ends of AB coils are that the A ends of tail end connection BC coils are followed by B phases, and the x ends of BC coils are that tail end connects C phases；The A ends of BN coils are connected with B, the tail end x ends ground connection of BN coils.Wiring principle of the present invention determines the uniqueness of three-phase electricity electromagnetic type voltage transformer resonance free wiring group, and insulation system applications at different levels can be met while resonance is not produced.
Description
Technical field
The present invention relates to voltage transformer field, a kind of three-phase electricity magnetic-type resonance free voltage transformer wiring group is referred specifically to
Not.
Background technology
Electric insulation system commonly uses the electromagnetic potential transformer of wiring group, principle such as Fig. 4 in world wide.Three
Phase power supply A, B, C are the insulation systems without neutral ground.And voltage transformer neutral point N must be grounded.So, N point current potentials
It is easy to drift.When electric power system singlephase earth fault, N point voltage drifts, remaining two-phase voltage is increased to and is more thanTimes.
At this moment zero-sequence current, voltage transformer magnetic circuit is produced to enter saturation state, hurried formed equivalent with ground capacity that diminish of impedance is gone here and there
Connection resonance, produces overvoltage.Cause power system insulation breakdown accident.
Patent No. ZL200920143886X, it is entitled：Resonance free Integral three-phase voltage transformer develops into product
Afterwards, played a role to eliminating resonance overvoltage among the operation of input Northwest Grid, long-term hanging net operation proves, this connect
The operation of line group also needs to perfect.
The content of the invention
The present invention provides a kind of three-phase electricity magnetic-type resonance free voltage transformer wiring group, eliminates asking for resonance overvoltage
Topic, while, it is determined that the uniqueness of electromagnetic potential transformer resonance free wiring group.
Therefore, the technical solution adopted in the present invention is：
A kind of three-phase electricity magnetic-type resonance free voltage transformer wiring group, including a three-phase coil, secondary side measurement loop, two
Secondary side measures protective loop, and secondary side residual voltage loop increases b in the wiring of falling V in the secondary measurement loop1N windings,
Balance threephase load；Wiring group is：Three-phase coil wiring：The A termination A phases of AB coils, the x ends of AB coils are tail end
The A ends for connecting BC coils are followed by B phases, and the x ends of BC coils are that tail end connects C phases；The A ends of BN coils are connected with B, the tail of BN coils
End x ends ground connection；The * ends of three-phase coil are Same Name of Ends with the * ends of secondary coil;Every group of coil correspondence：One group once
Coil and three groups of secondary coils, to subtract pole principle composition primary circuit and three secondary circuits, the wiring principle determines three-phase
The uniqueness of electromagnetic potential transformer resonance free wiring group.
Secondary side measurement loop of the invention reaches full after being improved on the basis of the original connection circuit of falling V is " ∧ " wiring
Foot insulation system applications at different levels.While the electromagnetic potential transformer connection principle of this wiring group（See Fig. 1）AB coils and
BC coils are in parallel with power supply.Impedance due to the internal resistance of source much smaller than AB coils and BC coils, so two coil reactance are not produced
Raw resonance.And composition stabilization with power supply identical " △ " wiring phase.Only BN coils X ends are grounded, as long as BN coils hold
The phase voltage received is increased to a times voltage electromagnetic circuit and does not enter saturation region, impedance and do not reduce and increases on the contrary, and resonance will not also occur
Phenomenon.
In insulation system in power supply " △ " phase phasor, any one phase is grounded, but the alternate electricity of power phase " △ "
It is stable that pressure is constant.The zero-sequence current very little of BN phases, i.e. impedance is very big, and series resonant tank is not constituted with ground capacity.This
Sample transformer would not occur resonance overvoltage.Also the problem of resonance overvoltage is just eliminated.
Brief description of the drawings
Fig. 1 is electromagnetic potential transformer elementary diagram of the invention；
Fig. 2 is secondary side measurement loop wiring diagram of the invention；
Fig. 3 is that secondary side of the invention measures protective loop wiring diagram；
Fig. 4 is traditional electromagnetic potential transformer elementary diagram.
Specific embodiment
The present invention is further described below in conjunction with the accompanying drawings.
Such as Fig. 1,2,3, a kind of three-phase electricity magnetic-type resonance free voltage transformer wiring group, including a three-phase coil, two
Secondary side measurement loop, secondary side measurement protective loop, secondary side residual voltage loop, the V that falls in the secondary measurement loop connects
Increase b in line1N windings, balance threephase load, and wiring group is：Three-phase coil wiring：The A termination A phases of AB coils,
The x ends of AB coils are that the A ends of tail end connection BC coils are followed by B phases, and the x ends of BC coils are that tail end connects C phases；The A ends of BN coils and B
It is connected, the tail end x ends ground connection of BN coils；The * ends of three-phase coil are Same Name of Ends with the * ends of secondary coil;Every group
Coil correspondence：One group of primary winding and three groups of secondary coils, to subtract pole principle composition primary circuit and three secondary circuits, this connects
Line principle determines the uniqueness of three-phase electricity electromagnetic type voltage transformer resonance free wiring group.
In the increased b in secondary measurement loop1N winding load capacity is a1b1Or b1c1/ 5th of ability can meet two
Secondary load is the requirement of delta connection or star-star connection load capacity.
Designing points of the invention：
The impedance of the winding of AB, BC two meets Standard by load and required precision, dielectric level is met.The impedance of BN press and 2
Under times rated voltage, magnetization operating point does not enter saturation region and meets full to load and required precision dielectric level under normal operation
Sufficient GB earthed voltage transformer requirement.So electrical sheet choosing >=2.25T silicon steel sheets, could meet requirement.
The sampling observation per batch, with symmetrical three-phase high-voltage power supply, detection " △ " and " Y " wiring load precision is consistent with nameplate.
Whole world power supply network uses isolated neutral system using two big systems of neutral ground and neutral insulation, China.
Isolated neutral system has many good qualities.But after system becomes huge, traditional YD/ydThe electromagnetic type electricity of -12 wiring groups
There is incompatible, generation resonance phenomena in pressure transformer.China is solved using many methods, is produced little effect.It is raw using the present invention
The voltage transformer of product will not produce resonance phenomena.Northwest Grid hanging net operation is most long existing 10 years, and operative practice is demonstrated not
Produce resonance.None is damaged for safe operation more than 200, and none produces resonance overcurrent and resonance overvoltage.
Claims (1)
1. a kind of three-phase electricity magnetic-type resonance free voltage transformer wiring group, an including three-phase coil, secondary side measurement loop,
Secondary side measures protective loop, secondary side residual voltage loop, it is characterised in that：In the wiring of falling V in the secondary measurement loop
Middle increase b1N windings, balance threephase load；Wiring group is：Three-phase coil wiring：The A termination A phases of AB coils, AB
The x ends of coil are that the A ends of tail end connection BC coils are followed by B phases, and the x ends of BC coils are that tail end connects C phases；The A ends of BN coils and B phases
Connection, the tail end x ends ground connection of BN coils；The * ends of three-phase coil are Same Name of Ends with the * ends of secondary coil;Every group of line
Circle correspondence：One group of primary winding and three groups of secondary coils, to subtract pole principle composition primary circuit and three secondary circuits, the wiring
Principle determines the uniqueness of three-phase electricity electromagnetic type voltage transformer resonance free wiring group.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710121882.0A CN106783098A (en) | 2017-03-02 | 2017-03-02 | Three-phase electricity magnetic-type resonance free voltage transformer wiring group |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710121882.0A CN106783098A (en) | 2017-03-02 | 2017-03-02 | Three-phase electricity magnetic-type resonance free voltage transformer wiring group |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN106783098A true CN106783098A (en) | 2017-05-31 |
Family
ID=58959611
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710121882.0A Pending CN106783098A (en) | 2017-03-02 | 2017-03-02 | Three-phase electricity magnetic-type resonance free voltage transformer wiring group |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106783098A (en) |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2417547Y (en) * | 2000-04-29 | 2001-01-31 | 萧楠 | Resonance-eleminating type voltage inductor |
| US20080088466A1 (en) * | 2006-10-16 | 2008-04-17 | Schweitzer Engineering Laboratories, Inc. | System and method to zero-sequence verify ground return path integrity by comparing measured zero-sequence current in an autotransformer with a second zero-sequence current source |
| CN201489988U (en) * | 2009-04-14 | 2010-05-26 | 萧楠 | Non-resonance three-phase integrated voltage mutual inductor |
| CN201812665U (en) * | 2010-10-27 | 2011-04-27 | 河南省电力公司信阳供电公司 | Anti-resonance three-phase voltage transformer |
| CN205609341U (en) * | 2016-05-18 | 2016-09-28 | 陕钢集团汉中钢铁有限责任公司 | Harmonic elimination formula voltage transformer |
| CN106158335A (en) * | 2016-08-31 | 2016-11-23 | 天水长开互感器制造有限公司 | A kind of three-phase resonance-eleminating type voltage inductor |
| CN206489960U (en) * | 2017-03-02 | 2017-09-12 | 国网甘肃省电力公司兰州供电公司 | Three-phase electricity magnetic-type resonance free voltage transformer wiring group |
-
2017
- 2017-03-02 CN CN201710121882.0A patent/CN106783098A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN2417547Y (en) * | 2000-04-29 | 2001-01-31 | 萧楠 | Resonance-eleminating type voltage inductor |
| US20080088466A1 (en) * | 2006-10-16 | 2008-04-17 | Schweitzer Engineering Laboratories, Inc. | System and method to zero-sequence verify ground return path integrity by comparing measured zero-sequence current in an autotransformer with a second zero-sequence current source |
| CN201489988U (en) * | 2009-04-14 | 2010-05-26 | 萧楠 | Non-resonance three-phase integrated voltage mutual inductor |
| CN201812665U (en) * | 2010-10-27 | 2011-04-27 | 河南省电力公司信阳供电公司 | Anti-resonance three-phase voltage transformer |
| CN205609341U (en) * | 2016-05-18 | 2016-09-28 | 陕钢集团汉中钢铁有限责任公司 | Harmonic elimination formula voltage transformer |
| CN106158335A (en) * | 2016-08-31 | 2016-11-23 | 天水长开互感器制造有限公司 | A kind of three-phase resonance-eleminating type voltage inductor |
| CN206489960U (en) * | 2017-03-02 | 2017-09-12 | 国网甘肃省电力公司兰州供电公司 | Three-phase electricity magnetic-type resonance free voltage transformer wiring group |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Wang et al. | Efficient grounding for modular multilevel HVDC converters (MMC) on the AC side | |
| RU2588614C2 (en) | Failure current limiter | |
| CN108318762A (en) | The method of discrimination of voltage transformer power frequency ferromagnetic resonance | |
| US20180019589A1 (en) | Fault current limiter | |
| Yuan et al. | A novel six-leg three-phase fault current limiter | |
| JP2007525933A (en) | Superconducting current limiting system and superconducting current limiting method | |
| CN106783098A (en) | Three-phase electricity magnetic-type resonance free voltage transformer wiring group | |
| Wang et al. | Mechanical characteristics analysis of defective transformer windings under short-circuit fault using 3-D FEM | |
| Zheng et al. | Analysis on the effects of energization mode for magnetically controlled shunt reactor | |
| CN206489960U (en) | Three-phase electricity magnetic-type resonance free voltage transformer wiring group | |
| CN206976140U (en) | Minimize outdoor three-phase anti-ferromagnetic resonance voltage transformer | |
| RU139189U1 (en) | DEVICE FOR COMPENSATION OF CAPACITIVE CURRENTS WITH SINGLE PHASE CIRCUIT TO THE GROUND IN ELECTRIC NETWORKS WITH INSULATED NEUTRAL | |
| RU2549974C2 (en) | Device for compensation of capacitor currents of single-phase short circuits to earth in electric networks with insulated neutral line | |
| CN204142823U (en) | A kind of measurement and protective device being applied to 10kV electric system | |
| CN209657987U (en) | Ring network cabinet anti-resonance potential transformer | |
| CA2910674C (en) | Apparatus for reducing a magnetic unidirectional flux component in the core of a transformer | |
| Pirhadi et al. | Design of an unsaturated core-based fault current limiter to tackle unsymmetrical faults | |
| Sonagra et al. | Controlled switching of non-coupled & coupled reactor for re-ignition free de-energization operation | |
| CN102709045A (en) | Combined mutual inductor | |
| Dhara et al. | Modelling and analysis of an efficient DC reactor type superconducting fault current limiter circuit | |
| Dufournet et al. | Revision of IEEE C37. 011 guide for the application of transient recovery voltages for AC high-voltage circuit breakers | |
| CN202633020U (en) | Combined transformer | |
| WU et al. | Research on the improved fault current limiter based on high coupled split reactor | |
| CN212010706U (en) | Novel zero sequence current transformer for circuit breaker | |
| Dong et al. | Selection and protection of earthing transformer |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20170531 |
|
| RJ01 | Rejection of invention patent application after publication |