CN202512151U - Electronic type capacitive voltage divider - Google Patents
Electronic type capacitive voltage divider Download PDFInfo
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- CN202512151U CN202512151U CN2012200834762U CN201220083476U CN202512151U CN 202512151 U CN202512151 U CN 202512151U CN 2012200834762 U CN2012200834762 U CN 2012200834762U CN 201220083476 U CN201220083476 U CN 201220083476U CN 202512151 U CN202512151 U CN 202512151U
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Abstract
An electronic type capacitive voltage divider comprises a plurality of cylindrical metal screens which are mutually telescoped and isolated. The plurality of cylindrical metal screens are arranged concentrically with a central insulating column body, and are successively fixed in a top-bottom manner along an axial direction to form a cylindrical capacitance shielding layer which sheathes on the center insulating column body; cross-sections of the plurality of cylindrical metal screens in the cylindrical capacitance shielding layer are in bilateral symmetry along an axial direction and in ladder-shaped arrangement, wherein a metal screen which is most adjacent to an inner side and the last but one layer of the metal screen form a high-voltage arm capacitor through lead wires, the lead wire of the last but one layer of the metal screen and a metal screen which is most adjacent to an outer side form a low-voltage arm capacitor through the lead wires. The electronic type capacitive voltage divider of the utility model solves the problems of proneness to occurrence of a phenomenon of ferromagnetic resonance and large measuring error caused by susceptibility to environmental influence in a voltage divider used in a prior-art power system are solved.
Description
Technical field
The utility model relates to a kind of electric equipment, relates in particular to a kind of electronic type capacitive divider.
Background technology
The voltage divider that uses in the electric system at present has multiple, like traditional power-frequency voltage voltage divider of electromagnetic potential transformer, capacitance type potential transformer, testing laboratory with utilize optical device as the photoelectric voltage sensor of sensor etc.These several kinds of voltage dividers all exist the following problem:
The electromagnetic potential transformer that utilizes the main insulating material of SF6 conduct is because of the ferromagnetic non-linear ferroresonance that is prone in electrical network, take place, and its insulation system is complicated, and insulating property are bad, along with the non-linear increase of its manufacturing cost of raising of electric pressure; Particularly the ferroresonance problem is the electric system open question always.
Tradition oil immersion capacitance type potential transformer error robustness is bad; The factor affecting such as electric power that suited by temperature, frequency, adjacent articles, high-voltage connection layout and circuit, the traditional oils capacitance type potential transformer great majority in the domestic operation of power networks are in overproof state.Simultaneously, its inner a plurality of energy-storage travelling wave tubes cause inner ferroresonance easily, and inner damper also damages easily, and filth also influences its error.
No matter be grease insulation or gas-insulated, all exist seepage, contaminated environment to some extent, maintenance workload is big, accident rate is higher, and problems such as volume is big, Heavy Weight.
Traditional power-frequency voltage voltage divider of testing laboratory can be divided into coupling capacitance type, resistor-type and capacitance-resistance type again, and they receive on every side that article, high-voltage connection influence greatly, receives environmental baseline (particularly relative humidity, filth) influence bigger.
Utilize optical device to receive temperature, vibration, device stability and reliability, modulating and demodulating signal error, Electric Field Distribution (adjacent articles) influence, be difficult to satisfy metering, standard requirement as the photoelectric voltage sensor of sensor.
Therefore, the technical scheme of a kind of new electronic type capacitive divider structure of current needs solves the problems referred to above.
The utility model content
The utility model technical matters to be solved provides a kind of electronic type capacitive divider, has solved the voltage divider that uses in the current power system and has been prone to the phenomenon of ferroresonance take place and receive environmental influence to cause the big problem of measuring error greatly.
In order to address the above problem; A kind of electronic type capacitive divider of the utility model; Comprise a plurality of tubular metal screens; Said a plurality of tubular metal screen is nestable and mutual isolation each other, and said a plurality of tubular metal screens and central insulation cylinder are the concentric circles setting simultaneously, and the fixing successively from top to bottom vertically tubular electric capacity screen layer of forming; This tubular electric capacity screen layer is sleeved on the outside of central insulation cylinder; In the tubular electric capacity screen layer xsect of a plurality of tubular metal screens be shaped as symmetria bilateralis and stepped distributional pattern vertically, wherein the most inboard metal screen constitutes high-voltage arm electric capacity with the metal screen of layer second from the bottom through lead-in wire, the metal screen lead-in wire of layer second from the bottom and outermost metal screen are through the formation low-voltage arm electric capacity that goes between.
Further; Above-mentioned electronic type capacitive divider also can comprise grading shield and base plate; This grading shield be fixed on said tubular electric capacity screen layer the top and with the most inboard metal screen for being electrically connected, this base plate be fixed on said tubular electric capacity screen layer the bottom and with outermost metal screen for being electrically connected.
Further, above-mentioned electronic type capacitive divider also can comprise aviation plug, said outermost metal screen ground connection, and the metal screen of outermost metal screen and layer second from the bottom goes between respectively to this aviation plug.
Further, above-mentioned electronic type capacitive divider also can comprise the impedance unit that is used to regulate the size of exporting signal, is connected with said aviation plug.
Further, above-mentioned electronic type capacitive divider also can comprise regulating circuit, connects said impedance unit, and this regulating circuit comprises integral unit, amplitude regulon, the phase-shifting unit that connects successively and follows the unit.
Further, above-mentioned electronic type capacitive divider also can comprise, all fills insulating medium with the outside between said central insulation right cylinder and the said tubular electric capacity screen layer.
The utility model also provides a kind of electronic type capacitive divider, comprises a plurality of electronic type capacitive dividers that are connected in series each other.
Compared with prior art; Use the utility model; The electronic type capacitive divider of the utility model adopts equivalent coaxial dry type capacitance partial pressure design, have simple in structure, transient characterisitics good, good insulation preformance and on electrical network operation the advantages such as phenomenon of electromagnetic potential transformer generation ferroresonance can not appear; The utlity model has maximum flexible design characteristics; Just different with traditional product is; The product of different electric pressures can combine on the basis of 10kV product; The voltage divider product of 20kV only needs the series connection of 2 10kV voltage dividers, and the voltage divider product of 35kV only needs the series connection of 3 10kV voltage dividers.It is exactly that the whole field intensity of voltage divider is even through the design of computing machine electric capacity screen that the utility model also has the another one advantage, the operation safety and reliability.This voltage divider output signal accuracy is high, and the interference of ambient temperature, humidity or the like is very little to the influence of this voltage divider.
Description of drawings
Fig. 1 is the 10kV electronic type capacitive divider outside drawing of the utility model;
Fig. 2 is the inner key part structure figure of the 10kV electronic type capacitive divider of the utility model;
Fig. 3 is the electrical schematic diagram of the 10kV electronic type capacitive divider of the utility model;
Fig. 4 is the electronic type capacitance voltage voltage divider outside drawing of the 20kV of the utility model.
Embodiment
Below in conjunction with accompanying drawing and embodiment the utility model is described further.
The electronic type capacitive divider of the utility model comprises high-voltage arm electric capacity, low-voltage arm electric capacity and secondary outlet aviation plug; Wherein form cylindric electric capacity screen layer in the insulating medium by several nestable each other being fixed on successively from top to bottom vertically of isolating each other again with the concentrically ringed tubular metal screen of central insulation cylinder; Be sleeved on the outside of central insulation cylinder; Grading shield is fixed on the top of electric capacity screen layer and is electrically connected with uppermost metal screen; Base plate is fixed on the bottom of electric capacity screen layer and is electrically connected with nethermost metal screen, and wants reliable ground.Nethermost capacitance plate and penult capacitance plate go between respectively to aviation plug; Export as signal; This signal is handled through outside converter, makes to export signal amplitude and the requirement of phase angle conformance with standard, satisfies the measurement and the protection demand of power system voltage.All fill insulating medium with the outside between central insulation right cylinder and the electric capacity screen layer.
Fig. 1 is the 10kV capacitive divider outside drawing of the utility model, wherein, the 1st, grading shield, the 2nd, voltage divider base.
As shown in Figure 2; The electronic type capacitive divider of the utility model; Comprise: at the central insulation right cylinder prefabricated high-field electrode output in 7 surperficial upper ends bolt 3, first screen of capacitance plate 4 covers above the central insulation right cylinder 7 with the metallic copper gauze screen and on the high-field electrode 3, forms cylindric.Several nestable each other isolate each other again being fixed on successively from top to bottom vertically with the concentrically ringed tubular metal screen of central insulation cylinder are formed cylindric electric capacity screen layer in the insulating medium; Be sleeved on the outside of central insulation cylinder; Nethermost capacitance plate and screen second from the bottom be extension line to aviation plug 8 respectively; Electrode 3 constitutes capacitor C 1 with penultimate capacitance plate lead-in wire; Penultimate capacitance plate lead-in wire and nethermost capacitance plate lead-in wire constitute capacitor C 2, and nethermost capacitance plate will pass through 5 earth terminal reliable grounds.With outside all filling insulating mediums 6, insulating medium 6 is made up of epoxy resin, hardening agent, toughner and spun glass between central insulation right cylinder and the electric capacity screen layer.Grading ring 1 is fixed on the upper end of voltage divider, is electrically connected with high-field electrode 3, and base plate 2 is fixed on the bottom of electric capacity screen layer and is electrically connected with nethermost metal screen, and wants reliable ground.
Fig. 3 is the electrical schematic diagram of 10kV capacitive divider, and wherein 9 is voltage divider high pressure equivalent capacitys; The 10th, voltage divider low pressure equivalent capacity; The 11st, regulating circuit.Wherein, the output signal of aviation plug is through impedance unit (resistance R), and promptly impedance unit is connected with said aviation plug, can regulate the size of output signal.Output signal through resistance R is handled through regulating circuit 11, and this regulating circuit comprises integral unit, amplitude regulon, the phase-shifting unit that connects successively and follows the unit.Through signal output supply capability systematic survey and the protection after the regulating circuit processing.
The electronic type capacitive divider of the utility model comprises a plurality of tubular metal screens; Said a plurality of tubular metal screen is nestable and mutual isolation each other; Said a plurality of tubular metal screens and central insulation cylinder are the concentric circles setting simultaneously; And the fixing successively from top to bottom vertically tubular electric capacity screen layer of forming; This tubular electric capacity screen layer is sleeved on the outside of central insulation cylinder; In the tubular electric capacity screen layer xsect of a plurality of tubular metal screens be shaped as symmetria bilateralis and stepped distributional pattern vertically, wherein the most inboard metal screen constitutes high-voltage arm electric capacity with the metal screen of layer second from the bottom through lead-in wire, the metal screen lead-in wire of layer second from the bottom and outermost metal screen are through the formation low-voltage arm electric capacity that goes between.
The electronic type capacitive divider of the utility model also comprises grading shield and base plate; This grading shield be fixed on said tubular electric capacity screen layer the top and with the most inboard metal screen for being electrically connected, this base plate be fixed on said tubular electric capacity screen layer the bottom and with outermost metal screen for being electrically connected.
Also can comprise aviation plug, said outermost metal screen ground connection, and the metal screen of outermost metal screen and layer second from the bottom goes between respectively to this aviation plug.
All fill insulating medium with the outside between said central insulation right cylinder and the said tubular electric capacity screen layer.
Fig. 4 is the voltage divider outside drawing of 20kV; It is that capacitive divider by 2 10kV is in series; It is unsettled that top voltage divider earthing pole 5 and following high-field electrode 3 are connected just passable, top voltage divider aviation plug, and the output signal has the voltage divider aviation plug output of bottom.
The utility model utilizes the distributed capacitance between high-field electrode and the low-field electrode to constitute the high-voltage arm capacitor C 1 of voltage divider, utilizes the coaxial low-voltage arm capacitor C 2 that rolls the electric capacity formation voltage divider that forms of double-level-metal film.Distributed capacitance between high-field electrode and the low-field electrode has shielding or the protection of shell body, makes the high-voltage arm electric capacity fix and not influenced by extraneous adjacent object.Secondary output is drawn by low-field electrode.Particularly, the utlity model has following technique effect:
1. simple in structure, transient characterisitics are good, good insulation preformance.
2. on electrical network, move the phenomenon that electromagnetic potential transformer generation ferroresonance can not occur.
3. error robustness is good, is superior to capacitance type potential transformer, not only is fit to electrical network and uses, and also is fit to testing laboratory and uses.
4. overcome traditional voltage divider, capacitance type potential transformer and electromagnetic potential transformer error performance and received adjacent object, high-voltage connection to arrange the influence of (proximity effect), not influenced by filth, not influenced by relative humidity.Temperature effect is less.
5. the linearity of intrinsic standoff ratio (being the relation of intrinsic standoff ratio and voltage height) is good, and uncertainty (comprising temperature effect, voltage linear, harmonic effects etc.) is superior to 0.03%.
The utility model can be used for the voltage sensor of electric system electric quantity metering, measurement and relay protection; And be used for testing laboratory monitoring power-frequency voltage, calibration potential transformator and a voltage divider.
The above; Be merely the preferable embodiment of the utility model; But the protection domain of the utility model is not limited thereto; Anyly be familiar with this technological people in the technical scope that the utility model disclosed, the variation that can expect easily or replacement all should be encompassed within the protection domain of the utility model.Therefore, the protection domain of the utility model should be as the criterion with the protection domain of claim.
Claims (7)
1. electronic type capacitive divider; It is characterized in that; Comprise a plurality of tubular metal screens; Said a plurality of tubular metal screen is nestable and mutual isolation each other, and said a plurality of tubular metal screens and central insulation cylinder are the concentric circles setting simultaneously, and the fixing successively from top to bottom vertically tubular electric capacity screen layer of forming; This tubular electric capacity screen layer is sleeved on the outside of central insulation cylinder; In the tubular electric capacity screen layer xsect of a plurality of tubular metal screens be shaped as symmetria bilateralis and stepped distributional pattern vertically, wherein the most inboard metal screen constitutes high-voltage arm electric capacity with the metal screen of layer second from the bottom through lead-in wire, the metal screen lead-in wire of layer second from the bottom and outermost metal screen are through the formation low-voltage arm electric capacity that goes between.
2. electronic type capacitive divider as claimed in claim 1; It is characterized in that; Also comprise grading shield and base plate; This grading shield be fixed on said tubular electric capacity screen layer the top and with the most inboard metal screen for being electrically connected, this base plate be fixed on said tubular electric capacity screen layer the bottom and with outermost metal screen for being electrically connected.
3. electronic type capacitive divider as claimed in claim 2 is characterized in that, also comprises aviation plug, said outermost metal screen ground connection, and the metal screen of outermost metal screen and layer second from the bottom goes between respectively to this aviation plug.
4. electronic type capacitive divider as claimed in claim 3 is characterized in that, also comprises the impedance unit that is used to regulate the size of exporting signal, is connected with said aviation plug.
5. electronic type capacitive divider as claimed in claim 4 is characterized in that, further comprises regulating circuit, connects said impedance unit, and this regulating circuit comprises integral unit, amplitude regulon, the phase-shifting unit that connects successively and follows the unit.
6. electronic type capacitive divider as claimed in claim 1 is characterized in that, all fills insulating medium with the outside between said central insulation cylinder and the said tubular electric capacity screen layer.
7. an electronic type capacitive divider is characterized in that, comprises the electronic type capacitive divider of a plurality of said claims 1 that are connected in series each other.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200834762U CN202512151U (en) | 2012-03-07 | 2012-03-07 | Electronic type capacitive voltage divider |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200834762U CN202512151U (en) | 2012-03-07 | 2012-03-07 | Electronic type capacitive voltage divider |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202512151U true CN202512151U (en) | 2012-10-31 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200834762U Expired - Fee Related CN202512151U (en) | 2012-03-07 | 2012-03-07 | Electronic type capacitive voltage divider |
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| CN (1) | CN202512151U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106546790A (en) * | 2016-11-25 | 2017-03-29 | 云南电网有限责任公司电力科学研究院 | A kind of differential configuration resitstance voltage divider |
| CN106597050A (en) * | 2017-02-24 | 2017-04-26 | 三峡大学 | Voltage sensor capable of realizing remote lifting |
| CN109270319A (en) * | 2018-11-29 | 2019-01-25 | 西安高研电器有限责任公司 | A kind of multi-tap voltage transformer and its production, adjustment method |
| CN109725193A (en) * | 2019-02-25 | 2019-05-07 | 云南电网有限责任公司红河供电局 | It is a kind of for running the suspension type neutral point undervoltage detection means for doing anti-defect diagonsis |
-
2012
- 2012-03-07 CN CN2012200834762U patent/CN202512151U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106546790A (en) * | 2016-11-25 | 2017-03-29 | 云南电网有限责任公司电力科学研究院 | A kind of differential configuration resitstance voltage divider |
| CN106597050A (en) * | 2017-02-24 | 2017-04-26 | 三峡大学 | Voltage sensor capable of realizing remote lifting |
| CN109270319A (en) * | 2018-11-29 | 2019-01-25 | 西安高研电器有限责任公司 | A kind of multi-tap voltage transformer and its production, adjustment method |
| CN109725193A (en) * | 2019-02-25 | 2019-05-07 | 云南电网有限责任公司红河供电局 | It is a kind of for running the suspension type neutral point undervoltage detection means for doing anti-defect diagonsis |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121031 Termination date: 20160307 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |