CN206432127U - Using the voltage transformer of anti-electric foundary weight magnetic resonance - Google Patents
Using the voltage transformer of anti-electric foundary weight magnetic resonance Download PDFInfo
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- CN206432127U CN206432127U CN201720069025.6U CN201720069025U CN206432127U CN 206432127 U CN206432127 U CN 206432127U CN 201720069025 U CN201720069025 U CN 201720069025U CN 206432127 U CN206432127 U CN 206432127U
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- potential transformer
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Abstract
The utility model is related to transformer field.Using the voltage transformer of anti-electric foundary weight magnetic resonance, including a voltage transformer group, voltage transformer group includes three single-phase potential transformers in parallel, and single-phase potential transformer is connected with a zero sequential potential transformer；Single-phase potential transformer includes first winding, and first winding includes a binding post for being used to be grounded, the voltage input end connection of binding post and zero sequential potential transformer, the voltage output end ground connection of zero sequential potential transformer.The utility model can expand monitoring voltage scope by a zero sequential potential transformer of being connected in voltage transformer group, make circuit operation more reliable.The inaccurate defect of measurement residual voltage is not present in the residual voltage that zero sequential potential transformer undertakes, and also has, and the D.C. resistance of zero sequential potential transformer is increased, and can effectively suppress ultra-low frequency oscillation electric current.
Description
Technical field
The utility model is related to transformer field, and in particular to voltage transformer.
Background technology
In isolated neutral system, in order to eliminate the ferromagnetic resonance in power network, through frequently with 4PT antiresonance mutual induction of voltage
Device.In the operation of China some areas and non-fully reliable, failure happens occasionally, and these failures have two common features：
One is " group's burning ", and the voltage transformer of each failure scaling loss is all more than two；Two are always included in the voltage transformer of scaling loss
" zero sequential potential transformer ".Through analyzing during the transient oscillation process after 4PT anti-resonance potential transformers, its single-phase earthing in system
Between it is longer, have very high overvoltage and certain overcurrent (but serious during without resonance), zero sequence during this on four voltage transformers
Voltage transformer undertakes more than 90% residual voltage, when ferromagnetic resonance occurs, and system occurs that very slow low frequency of decaying shakes
Swing, discharge current frequency is low, and amplitude is big.
Utility model content
The purpose of this utility model is to provide a kind of voltage transformer using anti-electric foundary weight magnetic resonance, above-mentioned to solve
At least one technical problem.
The technical problem that the utility model is solved can be realized using following technical scheme：
Using the voltage transformer of anti-electric foundary weight magnetic resonance, including a voltage transformer group, the voltage transformer group bag
Include three single-phase potential transformers in parallel, it is characterised in that the single-phase potential transformer and a zero sequential potential transformer string
Connection；
The single-phase potential transformer includes first winding, and the first winding includes a binding post for being used to be grounded,
The voltage input end connection of the binding post and zero sequential potential transformer, the voltage output termination of the zero sequential potential transformer
Ground.
The utility model can expand monitoring voltage model by a zero sequential potential transformer of being connected in voltage transformer group
Enclose, make circuit operation more reliable.The residual voltage that zero sequential potential transformer undertakes lacks in the absence of measurement residual voltage is inaccurate
Fall into, also have, the D.C. resistance of zero sequential potential transformer is increased, and can effectively suppress ultra-low frequency oscillation electric current.
The first winding is the primary line group by enamel-covered wire coiling, and the enamel-covered wire includes an insulating barrier, described
The external diameter of insulating barrier is in 0.5mm~0.6mm, and the internal diameter of the insulating barrier is in 0.3mm~0.4mm.
The thickness that the utility model limits insulating barrier ensure that the intensity of enamel-covered wire while ensure that insulation effect,
It is not easy to break.
The enamel-covered wire also includes a conductor, and the insulating barrier is set in the periphery of the conductor, and the conductor is in one
Empty aluminum steel, the external diameter of the hollow aluminum steel is in 0.3mm~0.4mm, and the internal diameter of the hollow aluminum steel is in 0.15mm~0.25mm.
The structure that the utility model optimizes conductor is realized in voltage transformer while can mitigating conductor weight
Use.
A fibrous layer is coated with the inwall of the hollow aluminum steel, the outer wall of the hollow aluminum steel is in provided with least ten
The groove of strip, the groove surrounds the radial arrangement of central axis of the hollow copper cash.
In the case that the utility model both ensure that conductor thickness was constant by groove, the resistance foot brought by Kelvin effect
The enough small intensity that also ensure that conductor.
The zero sequential potential transformer includes the housing that is made up of epoxy resin, the top of the housing provided with one be open to
On depression, using the depression as the radiator window of zero sequential potential transformer, liquid metal coating is filled with the depression.
Liquid metal is filled on the housing of zero sequential potential transformer by the utility model, and liquid metal is at high temperature (such as
More than 40 degree), it is liquid, when needing to radiate to zero sequential potential transformer, completes liquid and convert, the mobility of liquid,
Under upper and lower temperature difference effect, convection current can be produced, thermal diffusivity is far longer than solid metallic, and metal level can also realize electromagnetic shielding
Function.
A steel lid is stamped in the depression, the upper surface of the steel lid connects the radiating fin of at least three steels
Piece, using the radiating fin as radiator, the lower surface connection at least three of the steel lid is used to insert liquid metal
The plates of the steel of layer, heat exchanger is used as using the plates.
Plates are inserted liquid-metal layer and can realized by the utility model fully to be contacted with liquid-metal layer, is easy to lead
Heat, then realizes radiating by radiating fin.This patent is by the heat loss through convection of liquid metal, and the radiating that solid metallic is made
Device is combined, and both ensure that the heat exchange performance of liquid metal intensity, and the sealing to liquid metal is realized again.
Brief description of the drawings
Fig. 1 is circuit diagram of the present utility model；
Fig. 2 is the utility model voltage transformer group and the connection diagram of zero sequential potential transformer.
Embodiment
In order that technological means, creation characteristic, reached purpose and effect that the utility model is realized are easy to understand, under
Face, which combines to be specifically illustrating, is expanded on further the utility model.
Reference picture 1, Fig. 2, using the voltage transformer of anti-electric foundary weight magnetic resonance, including a voltage transformer group 3, voltage is mutual
Sensor group includes three single-phase potential transformers 1 in parallel, and single-phase potential transformer is connected with a zero sequential potential transformer 2；It is single
Phase voltage transformer includes first winding, and first winding includes a binding post for being used to be grounded, binding post and residual voltage
The voltage input end connection of transformer, the voltage output end ground connection of zero sequential potential transformer.The utility model passes through mutual in voltage
A zero sequential potential transformer of being connected in sensor group can expand monitoring voltage scope, make circuit operation more reliable.Residual voltage is mutual
The inaccurate defect of measurement residual voltage is not present in the residual voltage that sensor undertakes, and also has, the direct current of zero sequential potential transformer
Resistance is increased, and can effectively suppress ultra-low frequency oscillation electric current.
First winding is the primary line group by enamel-covered wire coiling, and enamel-covered wire includes an insulating barrier, the external diameter of insulating barrier
In 0.5mm~0.6mm, the internal diameter of insulating barrier is in 0.3mm~0.4mm.The thickness that the utility model limits insulating barrier can be protected
The intensity of enamel-covered wire is ensure that while card insulation effect, it is not easy to break.Enamel-covered wire also includes a conductor, and insulating barrier, which is set in, leads
The periphery of body, conductor is a hollow aluminum steel, and the external diameter of hollow aluminum steel is in 0.3mm~0.4mm, and the internal diameter of hollow aluminum steel is in 0.15mm
~0.25mm.The structure that the utility model optimizes conductor is realized in voltage transformer while can mitigating conductor weight
Use.A fibrous layer is coated with the inwall of hollow aluminum steel, the outer wall of hollow aluminum steel is provided with least ten grooves for being in strip,
Groove surrounds the radial arrangement of central axis of hollow copper cash.The utility model both ensure that conductor thickness was constant by groove
In the case of, the sufficiently small intensity that also ensure that conductor of resistance brought by Kelvin effect.
Single-phase potential transformer 1 is provided with first winding 11, double measurement winding 12, second protection winding 13；Residual voltage
Transformer 2 is provided with first winding 21, double measurement winding 22, second protection winding 23；First winding is included in a high-pressure side, one
Property point end；Double measurement winding includes a measurement winding output end, an earth terminal；It is defeated that second protection winding includes a protective winding
Go out end, an earth terminal, the neutral end of the first winding of three single-phase potential transformers is all connected with a zero sequential potential transformer group
First winding high-pressure side, the neutral end of the first winding of zero sequential potential transformer passes through wired earth；Three single-phase electricities
Press the measurement winding output of the double measurement winding of the earth terminal connection zero sequential potential transformer of the double measurement winding of transformer
End, the earth terminal of the double measurement winding of zero sequential potential transformer passes through wired earth；Three single-phase potential transformers it is secondary
The protective winding output end of the second protection winding of the earth terminal connection zero sequential potential transformer of protective winding, residual voltage mutual inductance
The earth terminal of the second protection winding of device passes through wired earth.
Zero sequential potential transformer includes the housing being made up of epoxy resin, and the top of housing is recessed provided with an opening upwards
Fall into, the radiator window to be recessed as zero sequential potential transformer, liquid metal coating is filled with depression.The utility model is by liquid
Metal filled liquid metal is liquid at high temperature (such as more than 40 degree) on the housing of zero sequential potential transformer, in needs pair
When zero sequential potential transformer is radiated, liquid conversion is completed, the mobility of liquid under upper and lower temperature difference effect, can be produced pair
Stream, thermal diffusivity is far longer than solid metallic, and metal level can also realize the function of electromagnetic shielding.A steel lid is stamped in depression
Body, the upper surface of steel lid connects the radiating fin of at least three steels, using radiating fin as radiator, steel lid
Lower surface connection at least three is used for the plates for inserting the steel of liquid-metal layer, and heat exchanger is used as using plates.This practicality
It is new plates are inserted into liquid-metal layer can realize fully contacted with liquid-metal layer, be easy to heat conduction, then by scattered
Hot fin realizes radiating.The heat loss through convection of liquid metal, and the radiator that solid metallic is made are combined by this patent, are both protected
The heat exchange performance of liquid metal intensity has been demonstrate,proved, the sealing to liquid metal is realized again.
General principle of the present utility model and principal character and advantage of the present utility model has been shown and described above.One's own profession
The technical staff of industry is it should be appreciated that the utility model is not restricted to the described embodiments, described in above-described embodiment and specification
Simply illustrate principle of the present utility model, on the premise of the utility model spirit and scope are not departed from, the utility model is also
Various changes and modifications are had, these changes and improvements are both fallen within the range of claimed the utility model.The utility model
Claimed scope is by appended claims and its equivalent thereof.
Claims (3)
1. using the voltage transformer of anti-electric foundary weight magnetic resonance, including a voltage transformer group, the voltage transformer group includes
Three single-phase potential transformers in parallel, it is characterised in that the single-phase potential transformer is connected with a zero sequential potential transformer；
The single-phase potential transformer includes first winding, and the first winding includes a binding post for being used to be grounded, described
The voltage input end connection of binding post and zero sequential potential transformer, the voltage output end ground connection of the zero sequential potential transformer.
2. the voltage transformer according to claim 1 using anti-electric foundary weight magnetic resonance, it is characterised in that it is described once around
Group is the primary line group by enamel-covered wire coiling, and the enamel-covered wire includes an insulating barrier, and the external diameter of the insulating barrier is in 0.5mm
~0.6mm, the internal diameter of the insulating barrier is in 0.3mm~0.4mm.
3. the voltage transformer according to claim 2 using anti-electric foundary weight magnetic resonance, it is characterised in that the enamel-covered wire
Also include a conductor, the insulating barrier is set in the periphery of the conductor, and the conductor is a hollow aluminum steel, the hollow aluminum steel
External diameter in 0.3mm~0.4mm, the internal diameter of the hollow aluminum steel is in 0.15mm~0.25mm.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720069025.6U CN206432127U (en) | 2017-01-17 | 2017-01-17 | Using the voltage transformer of anti-electric foundary weight magnetic resonance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720069025.6U CN206432127U (en) | 2017-01-17 | 2017-01-17 | Using the voltage transformer of anti-electric foundary weight magnetic resonance |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206432127U true CN206432127U (en) | 2017-08-22 |
Family
ID=59582637
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720069025.6U Active CN206432127U (en) | 2017-01-17 | 2017-01-17 | Using the voltage transformer of anti-electric foundary weight magnetic resonance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206432127U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108597826A (en) * | 2018-04-27 | 2018-09-28 | 上海大互电力电器有限公司 | Totally-enclosed epoxy resins insulation voltage transformer |
-
2017
- 2017-01-17 CN CN201720069025.6U patent/CN206432127U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108597826A (en) * | 2018-04-27 | 2018-09-28 | 上海大互电力电器有限公司 | Totally-enclosed epoxy resins insulation voltage transformer |
| CN108597826B (en) * | 2018-04-27 | 2020-11-24 | 上海大一互电力电器有限公司 | Totally-enclosed epoxy resin insulation voltage transformer |
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