CN206649072U - The flexible full optical-fiber current measurement apparatus of HVDC transmission system - Google Patents
The flexible full optical-fiber current measurement apparatus of HVDC transmission system Download PDFInfo
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- CN206649072U CN206649072U CN201720299859.6U CN201720299859U CN206649072U CN 206649072 U CN206649072 U CN 206649072U CN 201720299859 U CN201720299859 U CN 201720299859U CN 206649072 U CN206649072 U CN 206649072U
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Abstract
The utility model provides a kind of flexible full optical-fiber current measurement apparatus of HVDC transmission system, including direct-current wall bushing and flexible all-fiber current transformator；The direct-current wall bushing is fixed on the wall on through wall and by flange assembly, and current-carrying conducting rod is provided with the direct-current wall bushing；The flexible all-fiber current transformator includes sensor fibre and processing module；The sensor fibre is wound on the outer surface of ground potential cylinder of the direct-current wall bushing, and at the flange assembly, the joint of the sensor fibre electrically connects with the processing module；The sensor fibre is used to export polarized light signal to the processing module；The processing module is used to export tested current value.The utility model takes less spatial area, and reliability and stability greatly improve.
Description
Technical field
It the utility model is related to electrical equipment, the flexible all -fiber electricity of more particularly to a kind of HVDC transmission system
Flow measuring apparatus.
Background technology
High-voltage direct current in HVDC transmission system is up to 4000A, it is necessary to which it is become low current, such as 1A.Directly
Flow the electromagnetic induction process of electric current and the electromagnetic induction process of alternating current differs, therefore can not be changed using electromagnetic induction principle
The amplitude of time-dependent current.At present, the amplitude for changing electric current is realized using the principle of DC current transformer：A kind of current divider (micro-ohm
The resistance of level, can produce pressure drop, pressure drop corresponds to electric current, for measuring DC current when the current flows) superposition Luo Gaofusi
Lubber ring (a kind of alternating current converter using air as magnetic conductive media, for measuring alternation transient voltage).
In the prior art, need to realize between each DC current transformer in HVDC transmission system and insulate,
I.e. DC current transformer needs insulating space, and for 500kV HVDC transmission systems, DC current transformer is over the ground
Or between neighbouring electric conductor, insulation distance is no less than 6m, and 800kV space requirement is just bigger, so that arrangement high pressure
DC transmission system needs larger locus.In addition, induced voltage (corresponding to induced voltage) signal, in high outage electricity
Position, can not possibly directly be used, it is necessary to a kind of electronic installation is taken, after induced voltage is converted into polarized light signal, by light
Fibre earthward transmits at the high potential of high-altitude.This has a problem again, and these electronic installations are required to working power, so again
To try that with strong light, high-altitude is sent to by optical cable, reuse photoelectric device and convert light energy into electric energy, electronic devices use, and this
The reliability and stability of DC current transformer can be substantially reduced, so as to influence the reliability of HVDC transmission system and steady
It is qualitative.
Utility model content
The technical problems to be solved in the utility model is to arrange that HVDC transmission system needs in the prior art to overcome
A kind of the defects of wanting larger locus, there is provided the flexible full optical-fiber current measurement apparatus of HVDC transmission system.
The utility model is that solve above-mentioned technical problem by following technical proposals：
A kind of flexible full optical-fiber current measurement apparatus of HVDC transmission system, its feature be, the full light of flexibility
Fine current measuring device includes direct-current wall bushing and flexible all-fiber current transformator；
The direct-current wall bushing is through wall and is fixed on by flange assembly on the wall, the direct current set through walls
Current-carrying conducting rod is provided with pipe；
The flexible all-fiber current transformator includes sensor fibre and processing module；The sensor fibre is wound on described
On the outer surface of the ground potential cylinder of direct-current wall bushing, and at the flange assembly, the joint of the sensor fibre with
The processing module electrical connection；The sensor fibre is used to export polarized light signal to the processing module；The processing module
For exporting tested current value.
It is preferred that the flexible full optical-fiber current measurement apparatus also includes fiber optic protection cover, for being located at the direct current
Outside sensor fibre on wall bushing.
It is preferred that the fiber optic protection is covered with optical fiber outlet, for the joint of the sensor fibre to be led into institute
State outside fiber optic protection cover.
It is preferred that the processing module includes optical conversion unit, data processing unit and modulus output unit；
The optical conversion unit electrically connects with the joint of the sensor fibre and the data processing unit respectively；It is described
Data processing unit also electrically connects with the modulus output unit；
The optical conversion unit is used to change the polarized light signal and export modulated signal to the data
Processing unit, the data processing unit are used to the modulated signal being converted into electric signal, and by the electric signal send to
The modulus output unit；The modulus output unit is used to export tested current value.
It is preferred that the flexible full optical-fiber current measurement apparatus also includes shell, the processing module is placed in the shell
In, the earthing of casing current potential.
Positive effect of the present utility model is：The utility model takes minimum spatial area, does not change former system
System structure, and the reliability and stability of high voltage direct current flow measurement greatly improve.
Brief description of the drawings
Fig. 1 is the flexible full optical-fiber current measurement apparatus of the HVDC transmission system of the preferred embodiment of the utility model one
Part-structure schematic diagram.
Fig. 2 is the flexible full optical-fiber current measurement apparatus of the HVDC transmission system of the preferred embodiment of the utility model one
Partial circuit connection figure.
Embodiment
Name preferred embodiment, and become apparent from intactly illustrating the utility model with reference to accompanying drawing.
As shown in Figure 1-2, the flexible full optical-fiber current measurement apparatus of the HVDC transmission system of the present embodiment includes straight
Flow through wall sleeve 1, flexible all-fiber current transformator and fiber optic protection cover 2.Direct-current wall bushing 1 is through wall 5 and passes through method
Blue component is fixed on wall 5, and current-carrying conducting rod 11 is provided with direct-current wall bushing 1.Flexible all-fiber current transformator includes
Sensor fibre 3 and processing module 4；Sensor fibre 3 is wound on the outer surface of ground potential cylinder of direct-current wall bushing 1, and position
In fixation kit (namely root position of direct-current wall bushing) place, the joint of sensor fibre 3 electrically connects with processing module 4.Light
Fine protective cover 2 is located at outside the sensor fibre on direct-current wall bushing, dust-proof for windproof and rain proof, and its material properties will not
Ask.Optical fiber outlet (not shown) can be set on fiber optic protection cover, protected for the joint of sensor fibre to be led into optical fiber
Outside shield.Wherein, the number of turns of sensor fibre coiling is relevant with output current and rated current, can be set according to actual conditions.
In the present embodiment, processing module 4 includes optical conversion unit 41, data processing unit 42 and modulus output unit
43；Optical conversion unit 41 electrically connects with the joint and data processing unit 42 of sensor fibre 3 respectively；Data processing unit 42 is also
Electrically connected with modulus output unit 43.Sensor fibre 3 is used to export polarized light signal to processing module 4, the optics of processing module 4
Converting unit 41 is changed to the polarized light signal received and exports modulated signal to data processing unit 42, data processing
Modulated signal is converted into electric signal by unit 42, and electric signal is sent defeated to modulus output unit 43, modulus output unit 43
Go out tested current value.
In the present embodiment, the spatial area of the flexible full optical-fiber current measurement apparatus occupancy of HVDC transmission system is very
It is small, and installation is very convenient,, only need to be by flexibility without changing original equipment arrangement states particularly in Transfomer Substation Reconstruction
All-fiber current transformator is wound on direct-current wall bushing, you can realizes transformation.
In the present embodiment, flexible full optical-fiber current measurement apparatus also includes shell, and processing module is placed in shell, and shell connects
Ground.Because shell is ground connection, it is unrelated with the operating voltage of flexible all-fiber current transformator, so as to reliability and stability
Greatly improve.
Although the foregoing describing specific embodiment of the present utility model, it will be appreciated by those of skill in the art that
This is merely illustrative of, and the scope of protection of the utility model is defined by the appended claims.Those skilled in the art
On the premise of without departing substantially from principle of the present utility model and essence, various changes or modifications can be made to these embodiments,
But these changes and modification each fall within the scope of protection of the utility model.
Claims (5)
- A kind of 1. flexible full optical-fiber current measurement apparatus of HVDC transmission system, it is characterised in that the flexible all -fiber Current measuring device includes direct-current wall bushing and flexible all-fiber current transformator；The direct-current wall bushing is fixed on the wall on through wall and by flange assembly, in the direct-current wall bushing Provided with current-carrying conducting rod；The flexible all-fiber current transformator includes sensor fibre and processing module；The sensor fibre is wound on the direct current On the outer surface of wall bushing ground potential cylinder, and at the flange assembly, the joint of the sensor fibre and the place Manage module electrical connection；The sensor fibre is used to export polarized light signal to the processing module；The processing module is used for defeated Go out tested current value.
- 2. flexible full optical-fiber current measurement apparatus as claimed in claim 1, it is characterised in that the flexible full optical-fiber current is surveyed Amount device also includes fiber optic protection cover, for being located at outside the sensor fibre on the direct-current wall bushing.
- 3. flexible full optical-fiber current measurement apparatus as claimed in claim 2, it is characterised in that the fiber optic protection is covered with light Fine outlet, for the joint of the sensor fibre to be led to outside the fiber optic protection cover.
- 4. flexible full optical-fiber current measurement apparatus as claimed in claim 1, it is characterised in that the processing module includes optics Converting unit, data processing unit and modulus output unit；The optical conversion unit electrically connects with the joint of the sensor fibre and the data processing unit respectively；The data Processing unit also electrically connects with the modulus output unit；The optical conversion unit is used to change the polarized light signal and export modulated signal to the data processing Unit, the data processing unit is used to the modulated signal being converted into electric signal, and the electric signal is sent to described Modulus output unit；The modulus output unit is used to export tested current value.
- 5. flexible full optical-fiber current measurement apparatus as claimed in claim 1, it is characterised in that the flexible full optical-fiber current is surveyed Amount device also includes shell, and the processing module is placed in the shell, the earthing of casing current potential.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720299859.6U CN206649072U (en) | 2017-03-24 | 2017-03-24 | The flexible full optical-fiber current measurement apparatus of HVDC transmission system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720299859.6U CN206649072U (en) | 2017-03-24 | 2017-03-24 | The flexible full optical-fiber current measurement apparatus of HVDC transmission system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206649072U true CN206649072U (en) | 2017-11-17 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720299859.6U Active CN206649072U (en) | 2017-03-24 | 2017-03-24 | The flexible full optical-fiber current measurement apparatus of HVDC transmission system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206649072U (en) |
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2017
- 2017-03-24 CN CN201720299859.6U patent/CN206649072U/en active Active
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