CN206975096U - A kind of new bridging shunting high-voltage direct current voltage measuring apparatus - Google Patents
A kind of new bridging shunting high-voltage direct current voltage measuring apparatus Download PDFInfo
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- CN206975096U CN206975096U CN201720112021.1U CN201720112021U CN206975096U CN 206975096 U CN206975096 U CN 206975096U CN 201720112021 U CN201720112021 U CN 201720112021U CN 206975096 U CN206975096 U CN 206975096U
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- current divider
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Abstract
The utility model discloses a kind of new bridging shunting high-voltage direct current voltage measuring apparatus,Including current divider,First photoelectricity weighted-voltage D/A converter and the second optical-electrical converter,High-voltage dc voltage is transmitted to current divider by Rogowski coil,The current value of high-pressure side is provided by current divider,Transmit to the first optical-electrical converter and realized by the analog-to-digital conversion of side signal again,And transmitted successively by optical fiber insulator and optical fiber to the second optical-electrical converter,Realize by the digital-to-analogue conversion of side signal and output signal,The optical fiber insulator is by glass fiber resin plug,Grading ring and silicon rubber umbrella skirt composition,The silicon rubber umbrella skirt is coated on glass fiber resin mandrel surface,Grading ring is arranged on silicon rubber umbrella skirt surface by the both ends of the glass fiber resin plug by direct current flange,The current divider uses mouse-cage type structure,Its both ends is red copper disk,Centre is made up of more solid copper-manganese rods,The radius of copper-manganese rod is 3mm,Solve insulation and outside electromagnetic interference two large problems between high-low pressure,It is convenient for measuring.
Description
Technical field
HVDC field of measuring technique is the utility model is related to, specially a kind of new bridging shunting high voltage direct current
Flow voltage measuring apparatus.
Background technology
It is wide that China is vast in territory, the contrary distribution of the energy and load determines that high voltage dc transmission technology has in China
Application prospect.To the year two thousand twenty China power network is mixed by " handing over by force tetanic " extra-high voltage including 38 DC transmission engineerings is built up.
The transmission distance of China's planning and built straight transmission system farthest reaches more than 3000km, AC line mostly more than 1000km
The ratio that road construction and operating cost account for whole construction investment reaches 30~50%.Because DC power transmission line distance is longer, by
The influence of the factor such as regional external force destruction, thunderbolt and environmental pollution along the line, DC line fault rate raises year by year, to Tianguang HVDC
Fault statistics show that line fault accounts for the 50% of DC system fault within 2007 2001.High-voltage direct current transformer is installed
At DC transmission system DC pole bus, double 12 pulse conversion valve group midpoint (if applicable) buses and neutral bus, it is
Straight-flow system circuit controls and protection provides input signal, is that the indispensable core of each HVDC Converter Stations is set
It is standby.From the 1970s, the offshore company such as external ABB, SIEMENS begins to develop direct current instrument transformer, at present voltage etc.
Level reaches ± 800kV.The high voltage dc transmission technology of China is started to walk since the 1980s, the skill of DC current transformer
Art research also begins with this period, domestic former Wuhan High Voltage Research Institute, Xi'an High-Voltage Electrical Appliances research institute, the Central China University of Science and Technology etc.
R＆D institution and colleges and universities all deploy research to the correlation technique of direct current instrument transformer.Because domestic demand was few at that time, in addition it is domestic from
The transformer fluctuation of service of main development, is not promoted on DC power transmission line always, also, due to straight-flow system normal operation
When flow through current divider, it is larger in failure time-harmonic wave power frequency and amplitude, the influence of kelvin effect need to be considered, and traditional
Coil working point is relevant with DC component size, the measurement for high-voltage direct current voltage, can not effectively carry out, error
It is larger.
Utility model content
To achieve the above object, the utility model provides following technical scheme：A kind of new bridging shunting HVDC
Current-voltage measurement device, including current divider, the first photoelectricity weighted-voltage D/A converter and the second optical-electrical converter, high-voltage dc voltage pass through
Rogowski coil is transmitted to current divider, and the current value of high-pressure side is provided by current divider, then is transmitted to the first optical-electrical converter and realized quilt
The analog-to-digital conversion of side signal, and transmitted successively by optical fiber insulator and optical fiber to the second optical-electrical converter, realize by side signal
Digital-to-analogue conversion and output signal, the optical fiber insulator is made up of glass fiber resin plug, grading ring and silicon rubber umbrella skirt,
The silicon rubber umbrella skirt is coated on glass fiber resin mandrel surface, and the both ends of the glass fiber resin plug pass through direct current method
Grading ring is arranged on silicon rubber umbrella skirt surface by orchid, and the current divider uses mouse-cage type structure, and its both ends is red copper disk, centre by
More solid copper-manganese rod compositions, the radius of copper-manganese rod is 3mm.
Preferably, the Rogowski coil connects six height Accuracy Figure universal meter measurements using double shielded twisted pair line.
Compared with prior art, the beneficial effects of the utility model are：
(1) current divider work is not required to additional power source, measures no directionality, and accuracy of measurement is not influenceed by external magnetic field,
It is serially connected with tested DC line, and tens millivolts of magnitude voltage signals of tested electric current, sieve are proportional to based on Ohm's law output
Family name's coil is proportional to the voltage signal of harmonic current differential, the harmonic measure for circuit based on law of electromagnetic induction output；Will
Ripe current divider technology is combined with Fibre Optical Communication Technology, is solved and is insulated between high-low pressure and outside electromagnetic interference two is asked greatly
Topic, is convenient for measuring.
(2) insulator is made up of glass fiber resin plug, grading ring and silicon rubber umbrella skirt, has small volume, weight
Gently, high mechanical strength, anti-seismic performance are good and the advantages of durability against pollution is strong；
(3) current divider both ends are red copper disk, and centre is made up of more solid copper-manganese rods.Electric current accesses from both ends copper dish, electricity
Position terminal is drawn on the outside of copper dish close to circle centre position, designs every copper-manganese rod conductor radius in the case where ensureing mechanical strength
Kelvin effect can be effectively reduced for 3mm.
(4) Rogowski coil skeleton uses nonferromugnetic material, its biggest advantage is that solving traditional transformer operating point
It is relevant with DC component size, so as to which the problem of a small amount of harmonic wave in D.C. high-current can not be measured.
Brief description of the drawings
Fig. 1 is the utility model structure diagram；
Fig. 2 is the utility model optical fiber insulator structural representation；
Fig. 3 is the utility model diversion structure schematic diagram.
In figure：1- current dividers；2- the first photoelectricity weighted-voltage D/A converters；The optical-electrical converters of 3- second；4- Rogowski coils；5- optical fiber is exhausted
Edge；6- optical fiber；501- glass fiber resin plugs；502- grading rings；503- silicon rubber umbrella skirts；504- direct current flanges；101-
Red copper disk；102- copper-manganese rods.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the embodiment of the utility model is carried out
Clearly and completely describing, it is clear that described embodiment is only the utility model part of the embodiment, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment obtained, belong to the scope of the utility model protection.
Embodiment：
Fig. 1 to Fig. 3 is referred to, the utility model provides a kind of technical scheme：A kind of new bridging shunting HVDC
Current-voltage measurement device, including current divider 1, the first photoelectricity weighted-voltage D/A converter 2 and the second optical-electrical converter 3, high-voltage dc voltage
Transmitted by Rogowski coil 4 to current divider 1, the current value of high-pressure side is provided by current divider 1, then transmitted to the first optical-electrical converter
2 realize by the analog-to-digital conversion of side signal, and are transmitted successively by optical fiber insulator 5 and optical fiber 6 to the second optical-electrical converter 3, real
Now by the digital-to-analogue conversion of side signal and output signal, the optical fiber insulator 5 is by glass fiber resin plug 501, grading ring 502
Formed with silicon rubber umbrella skirt 503, the silicon rubber umbrella skirt 503 is coated on the surface of glass fiber resin plug 501, the glass fibers
Grading ring 502 is arranged on the surface of silicon rubber umbrella skirt 503, the shunting by the both ends of dimension resin plug 501 by direct current flange 504
Device 1 uses mouse-cage type structure, and its both ends is red copper disk 101, and centre is made up of more solid copper-manganese rods 102, and the half of copper-manganese rod 102
Footpath is 3mm, and the Rogowski coil 4 connects six height Accuracy Figure universal meter measurements using double shielded twisted pair line.
Rogowski coil is called current measurement coil, differential current sensor, is a uniform winding in nonferromugnetic material
On loop coil.Output signal is the differential of Current versus time.The electricity integrated by one to the voltage signal of output
Road, it is possible to truly reduce input current.
Grading ring：It is manifestly intended that main function is to press, and it is exchange suitable for voltage form, can be by high-pressure uniform
It is distributed in around object, ensures do not have potential difference between each position of annular, so as to reach the effect pressed.But《Building
Design code for lightning-proof》" grading ring " is renamed as " equipotential link ring in GB50057-2010.
Specifically used mode and advantage：
(1) current divider work is not required to additional power source, measures no directionality, and accuracy of measurement is not influenceed by external magnetic field,
It is serially connected with tested DC line, and tens millivolts of magnitude voltage signals of tested electric current, sieve are proportional to based on Ohm's law output
Family name's coil is proportional to the voltage signal of harmonic current differential, the harmonic measure for circuit based on law of electromagnetic induction output；Will
Ripe current divider technology is combined with Fibre Optical Communication Technology, is solved and is insulated between high-low pressure and outside electromagnetic interference two is asked greatly
Topic.
(2) insulator is made up of glass fiber resin plug, grading ring and silicon rubber umbrella skirt, has small volume, weight
Gently, high mechanical strength, anti-seismic performance are good and the advantages of durability against pollution is strong；
(3) current divider both ends are red copper disk, and centre is made up of more solid copper-manganese rods.Electric current accesses from both ends copper dish, electricity
Position terminal is drawn on the outside of copper dish close to circle centre position, designs every copper-manganese rod conductor radius in the case where ensureing mechanical strength
Kelvin effect can be effectively reduced for 3mm.
(4) Rogowski coil skeleton uses nonferromugnetic material, its biggest advantage is that solving traditional transformer operating point
It is relevant with DC component size, so as to which the problem of a small amount of harmonic wave in D.C. high-current can not be measured.
It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned one exemplary embodiment, and
And in the case of without departing substantially from spirit or essential attributes of the present utility model, it can realize that this practicality is new in other specific forms
Type.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and is nonrestrictive, this practicality is new
The scope of type limits by appended claims rather than described above, it is intended that the equivalency fallen in claim is contained
All changes in justice and scope are included in the utility model.Any reference in claim should not be considered as limitation
Involved claim.
Claims (2)
- A kind of 1. new bridging shunting high-voltage direct current voltage measuring apparatus, it is characterised in that：Including current divider (1), One photoelectricity weighted-voltage D/A converter (2) and the second optical-electrical converter (3), high-voltage dc voltage are transmitted to current divider by Rogowski coil (4) (1), the current value of high-pressure side is provided by current divider (1), then transmit to the first optical-electrical converter (2) and realize by the modulus of side signal Conversion, and transmitted successively by optical fiber insulator (5) and optical fiber (6) to the second optical-electrical converter (3), realize by the number of side signal Mould conversion and output signal, the optical fiber insulator (5) is by glass fiber resin plug (501), grading ring (502) and silicon rubber Full skirt (503) forms, and the silicon rubber umbrella skirt (503) is coated on glass fiber resin plug (501) surface, the glass fibre Grading ring (502) is arranged on silicon rubber umbrella skirt (503) surface, institute by the both ends of resin plug (501) by direct current flange (504) To state current divider (1) and use mouse-cage type structure, its both ends is red copper disk (101), and centre is made up of more solid copper-manganese rods (102), The radius of copper-manganese rod (102) is 3mm.
- 2. a kind of new bridging shunting high-voltage direct current voltage measuring apparatus according to claim 1, its feature exist In：The Rogowski coil (4) connects six height Accuracy Figure universal meter measurements using double shielded twisted pair line.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720112021.1U CN206975096U (en) | 2017-01-23 | 2017-01-23 | A kind of new bridging shunting high-voltage direct current voltage measuring apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720112021.1U CN206975096U (en) | 2017-01-23 | 2017-01-23 | A kind of new bridging shunting high-voltage direct current voltage measuring apparatus |
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| CN206975096U true CN206975096U (en) | 2018-02-06 |
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| CN201720112021.1U Expired - Fee Related CN206975096U (en) | 2017-01-23 | 2017-01-23 | A kind of new bridging shunting high-voltage direct current voltage measuring apparatus |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108918943A (en) * | 2018-04-16 | 2018-11-30 | 北京四方继保自动化股份有限公司 | A kind of D.C. high voltage transmission optics direct current measuring devices |
| CN109873257A (en) * | 2019-02-27 | 2019-06-11 | 国网陕西省电力公司电力科学研究院 | Reduce the capacitance compensation type grounding body and preparation method of earthing or grounding means impact impedance |
-
2017
- 2017-01-23 CN CN201720112021.1U patent/CN206975096U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108918943A (en) * | 2018-04-16 | 2018-11-30 | 北京四方继保自动化股份有限公司 | A kind of D.C. high voltage transmission optics direct current measuring devices |
| CN108918943B (en) * | 2018-04-16 | 2021-06-08 | 北京四方继保自动化股份有限公司 | Optical direct current measuring device for high-voltage direct current transmission |
| CN109873257A (en) * | 2019-02-27 | 2019-06-11 | 国网陕西省电力公司电力科学研究院 | Reduce the capacitance compensation type grounding body and preparation method of earthing or grounding means impact impedance |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180206 Termination date: 20190123 |
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| CF01 | Termination of patent right due to non-payment of annual fee |