CN206594218U - All-fiber current transformator - Google Patents
All-fiber current transformator Download PDFInfo
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- CN206594218U CN206594218U CN201720211471.6U CN201720211471U CN206594218U CN 206594218 U CN206594218 U CN 206594218U CN 201720211471 U CN201720211471 U CN 201720211471U CN 206594218 U CN206594218 U CN 206594218U
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- fiber current
- current transformator
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- optical sensor
- current
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Abstract
The utility model provides a kind of all-fiber current transformator, including Fibre Optical Sensor ring and cable, the Fibre Optical Sensor ring is arranged on the head position of the all-fiber current transformator, the cable passes through the inside of the Fibre Optical Sensor ring, and it is set around on the Fibre Optical Sensor ring, the scope of the coiling number of turns of the cable is that 10 circles~80 are enclosed, one end of the cable is fixedly installed on the head of the all-fiber current transformator, and the other end is electrically connected with the output end of the all-fiber current transformator.The all-fiber current transformator that the utility model is provided is used to measure DC filter out-of-balance current and alternating current filter out-of-balance current, and noise resisting ability is not only increased during measurement, the measurement accuracy to smaller current is also improved.
Description
Technical field
The utility model is related to power grid security and electric-power metering field, more particularly to a kind of all-fiber current transformator.
Background technology
With China's rapid development of economy and the continuous improvement of living standards of the people so that country is to electric power resource
Demand is continuously increased.But China is vast in territory, the distributed pole of power generation energy resource distribution of resource and power load is unbalanced, Large Copacity
Need for electricity and long distance power transmission just become the distinctive national conditions of China.China's extra-high voltage direct-current transmission skill since 2003
The application study of art, first ± 800kV extra-high voltage direct-current transmission engineering puts into operation within 2010, the line for putting into operation and implementing so far
Up to 18, road.All-fiber current transformator is widely used as a kind of current measuring device of UHVDC converter station
In each extra-high voltage direct-current transmission engineering project.
But, current all-fiber current transformator is when measuring alternating current-direct current wave filter out-of-balance current, noise resisting ability
Difference, and the requirement to the measurement accuracy of smaller current can not be met.
Utility model content
The technical problems to be solved in the utility model be in order to overcome in the prior art all-fiber current transformator measurement
During alternating current-direct current wave filter out-of-balance current, noise resisting ability is poor, and can not meet the requirement to the measurement accuracy of smaller current
Defect there is provided a kind of all-fiber current transformator.
The utility model is to solve above-mentioned technical problem by following technical proposals：
A kind of all-fiber current transformator, its feature is, the all-fiber current transformator include Fibre Optical Sensor ring and
Cable, the Fibre Optical Sensor ring is arranged on the head position of the all-fiber current transformator, and the cable passes through institute
The inside of Fibre Optical Sensor ring is stated, and is set around on the Fibre Optical Sensor ring, the scope of the coiling number of turns of the cable is 10
Circle~80 is enclosed, and one end of the cable is fixedly installed on the head of the all-fiber current transformator, and the other end with it is described
The output end electrical connection on the head of all-fiber current transformator.
It is preferred that the coiling number of turns of the cable is 30 circles.
It is preferred that the coiling number of turns of the cable is 60 circles.
It is preferred that the all-fiber current transformator also includes insulator, the Fibre Optical Sensor ring is arranged at insulator
On one end.
It is preferred that the all-fiber current transformator also includes firm banking, the other end of the insulator is fixedly installed
In on the firm banking, the firm banking is used to the all-fiber current transformator being erected in ground.
It is preferred that the sensor fibre number of turns of the Fibre Optical Sensor ring is 20 circles.
On the basis of common sense in the field is met, above-mentioned each optimum condition can be combined, produce the utility model it is each compared with
Good example.
Positive effect of the present utility model is：
The all-fiber current transformator that the utility model is provided is used to measure DC filter out-of-balance current and exchange filter
Ripple device out-of-balance current, not only increases noise resisting ability during measurement, also improve the measurement accuracy to smaller current.
Brief description of the drawings
Fig. 1 is the structural representation of the all-fiber current transformator of the utility model preferred embodiment.
Fig. 2 is the structural representation in the head of the all-fiber current transformator of the utility model preferred embodiment.
Embodiment
Name preferred embodiment, and become apparent from intactly illustrating the utility model with reference to accompanying drawing.
As shown in Figures 1 and 2, the all-fiber current transformator that the present embodiment is provided includes head 1, insulator 2, fixed bottom
Seat 3, Fibre Optical Sensor ring 4 and cable 5, Fibre Optical Sensor ring 4 are set in head 1, and head 1 is arranged on one end of insulator 2, absolutely
The other end of edge 2 is fixedly installed on firm banking 3, and firm banking 3 is used to the all-fiber current transformator being erected in
Ground, cable 5 passes through the inside of Fibre Optical Sensor ring 4, and is set around on Fibre Optical Sensor ring 4, and one end of cable 5, which is fixed, to be set
It is placed on head 1, and the other end is electrically connected with the output end 6 on head.In the present embodiment, the coiling number of turns of cable is 30
Circle, naturally it is also possible to be 60 circles or other coiling number of turns, can be selected according to actual conditions, the sensing of Fibre Optical Sensor ring 4
The optical fiber number of turns is 20 circles.
The operation principle and flow of all-fiber current transformator described in detailed description below.
Magnetic vector is integrated along any one zone boundary, its numerical value is equal to by the electricity in this zone boundary
The summation of stream, this theorem and the shape in region or which kind of material are without any relation, and the stray field that adjacent conductor is produced
Any closed-loop vector integration be zero, unless Fibre Optical Sensor ring adjacent conductor also around wherein.According to Ampere theorem, optical fiber around
It is exactly to integrate twice around two circles, equal to twice of electric current has been surveyed, so the multiple of measurement electric current is M (light once enclosing integration once
The number of turns of the sensor fibre of fibre sensing ring) * N (the coiling number of turns of cable), in the present embodiment, if the coiling number of turns of cable
For 30 circles, then the multiple for measuring electric current is 20*30=600 times, if the coiling number of turns of cable is 60 circles, times of measurement electric current
Number is 20*60=1200 times.Ampere theorem does not have particular/special requirement to the path of fiber windings, is closed as long as this explanation is formed
Combining footpath, the shape and angle for path is not related.According to above-mentioned theorem by the alternating current-direct current wave filter that need to be measured not
Balanced balanced current is introduced to the output end on head by connection terminal, and is electrically connected with the cable that is wrapped in Fibre Optical Sensor ring
Connect, by multiple integral measurement electric current, all-fiber current transformator is strengthened in measurement alternating current-direct current wave filter out-of-balance current with this
When noise resisting ability and improve measurement alternating current-direct current wave filter out-of-balance current when low current precision.Noise and measurement accuracy are such as
Shown in following table：
All-fiber current transformator noise and measurement accuracy subordinate list
All-fiber current transformator needs to meet the insulating requirements of measurement of correlation point, i.e. measuring point in the application of actual items
The technical requirements such as voltage class, specified lightning wave impulse withstanding voltage and nominal operation wave impact withstanding voltage.Therefore all -fiber
Current transformer need to assemble the insulator for meeting relevant voltage grade and retting-flax wastewater, while also needing to assemble corresponding fixed bottom
Seat.
The all-fiber current transformator that the present embodiment is provided is used to measure DC filter out-of-balance current and ac filter
Device out-of-balance current, not only increases noise resisting ability during measurement, also improve the measurement accuracy to smaller current.
Although the foregoing describing embodiment of the present utility model, it will be appreciated by those of skill in the art that
This is merely illustrative of, and protection domain of the present 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 protection domain of the present utility model.
Claims (6)
1. a kind of all-fiber current transformator, it is characterised in that the all-fiber current transformator includes Fibre Optical Sensor ring and electricity
Cable, the Fibre Optical Sensor ring is arranged on the head position of the all-fiber current transformator, and the cable is described in
The inside of Fibre Optical Sensor ring, and be set around on the Fibre Optical Sensor ring, the scope of the coiling number of turns of the cable is 10 circles
~80 circles, one end of the cable is fixedly installed on the head of the all-fiber current transformator, and the other end with it is described complete
The output end electrical connection on the head of optical fiber current mutual inductor.
2. all-fiber current transformator as claimed in claim 1, it is characterised in that the coiling number of turns of the cable is 30
Circle.
3. all-fiber current transformator as claimed in claim 1, it is characterised in that the coiling number of turns of the cable is 60
Circle.
4. all-fiber current transformator as claimed in claim 1, it is characterised in that the all-fiber current transformator also includes
Insulator, the Fibre Optical Sensor ring is arranged on one end of insulator.
5. all-fiber current transformator as claimed in claim 4, it is characterised in that the all-fiber current transformator also includes
Firm banking, the other end of the insulator is fixedly installed on the firm banking, and the firm banking is used for will be described complete
Optical fiber current mutual inductor is erected in ground.
6. the all-fiber current transformator as described in any one in Claims 1 to 5, it is characterised in that the Fibre Optical Sensor
The sensor fibre number of turns of ring is 20 circles.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720211471.6U CN206594218U (en) | 2017-03-06 | 2017-03-06 | All-fiber current transformator |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720211471.6U CN206594218U (en) | 2017-03-06 | 2017-03-06 | All-fiber current transformator |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206594218U true CN206594218U (en) | 2017-10-27 |
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ID=60126301
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720211471.6U Active CN206594218U (en) | 2017-03-06 | 2017-03-06 | All-fiber current transformator |
Country Status (1)
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| CN (1) | CN206594218U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111983283A (en) * | 2020-09-03 | 2020-11-24 | 上海润京能源科技有限公司 | Wiring structure and all-fiber current transformer sensing head |
-
2017
- 2017-03-06 CN CN201720211471.6U patent/CN206594218U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111983283A (en) * | 2020-09-03 | 2020-11-24 | 上海润京能源科技有限公司 | Wiring structure and all-fiber current transformer sensing head |
| CN111983283B (en) * | 2020-09-03 | 2023-06-27 | 上海润京能源科技有限公司 | Wiring structure and all-fiber current transformer sensing head |
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