CN108918940A - Full optical-fiber current mutual induction system and method with temperature-compensating - Google Patents
Full optical-fiber current mutual induction system and method with temperature-compensating Download PDFInfo
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- CN108918940A CN108918940A CN201810698390.2A CN201810698390A CN108918940A CN 108918940 A CN108918940 A CN 108918940A CN 201810698390 A CN201810698390 A CN 201810698390A CN 108918940 A CN108918940 A CN 108918940A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/24—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using light-modulating devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/02—Testing or calibrating of apparatus covered by the other groups of this subclass of auxiliary devices, e.g. of instrument transformers according to prescribed transformation ratio, phase angle, or wattage rating
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Abstract
This disclosure relates to a kind of full optical-fiber current mutual induction system and method with temperature-compensating.The system includes Fibre Optical Sensor ring；Acquisition process unit is connected to Fibre Optical Sensor ring, generates the optical signalling for entering Fibre Optical Sensor ring, and generate double measurement signal；Temperature measuring unit obtains the temperature data of Fibre Optical Sensor ring；Temperature compensation unit is connected respectively to acquisition process unit and temperature measuring unit, is based on temperature data, and combination temperature penalty coefficient carries out temperature-compensating amendment to double measurement signal, so that acquisition process unit exports revised double measurement signal.In accordance with an embodiment of the present disclosure, using the Fibre Optical Sensor circumstance temperature degree of all-fiber current transformator than poor repeat property, using determining temperature compensation coefficient, realizes the temperature-compensating to all-fiber current transformator, improve the measuring accuracy of all-fiber current transformator.
Description
Technical field
This disclosure relates to power electronics field more particularly to a kind of full optical-fiber current mutual inductance system with temperature-compensating
System and method.
Background technique
All-fiber current transformator is to provide electric current number in electric system for equipment such as electrical energy measurement, observing and controlling, relay protections
According to power equipment.Due to big with dynamic range, transient characterisitics are good, digital output, quick response, response band are wide, one
The advantages that secondary completely insulated and more and more applied.Especially adapt to intelligent power network and high-voltage dc transmission electrical domain
Current measurement development need, be the main direction of development of electric system current measurement.
With the popularization and application of the pilot project of all-fiber current transformator, technology and also exposing for technique are much asked
Topic, wherein failure rate is about tens times of conventional electromagnetic mutual inductor, and reliability service is all-fiber current transformator engineer application
Critical issue urgently to be resolved.Cause in all-fiber current transformator failure, the precision drift problem that temperature influences is that everybody is general
The problem of all over concern.The main reason for causing temperature drift problems includes the birefringent influence of sensor fibre loop, 1/4 wave of optical fiber
Piece manufacture craft and the influence of temperature drift etc..In order to inhibit measurement error caused by temperature, need to full optical-fiber current mutual inductance
The sensing loop section of device carries out temperature-compensating, to meet application requirement.Side disclosed in optical fiber current mutual inductor temperature-compensating at present
Method is all difficult to carry out accurate, real-time, reliable temperature-compensating to the measurement error of all-fiber current transformator.
Summary of the invention
In view of this, the present disclosure proposes a kind of full optical-fiber current mutual induction system and method with temperature-compensating, to have
Effect inhibits the precision drift problem of all-fiber current transformator caused by temperature.
According to the one side of the disclosure, a kind of all-fiber current transformator system with temperature-compensating is proposed.The system
System includes：
Fibre Optical Sensor ring；
Acquisition process unit is connected to the Fibre Optical Sensor ring, generates the optical signalling for entering the Fibre Optical Sensor ring, and
Photoelectric conversion and signal processing are carried out to generate to the optical signalling that the Fibre Optical Sensor ring generates under the function of current to be measured
Double measurement signal；
Temperature measuring unit obtains the temperature data of the Fibre Optical Sensor ring；
Temperature compensation unit is connected respectively to the acquisition process unit and the temperature measuring unit, is based on the temperature number
According to combination temperature penalty coefficient carries out temperature-compensating amendment to the double measurement signal, so that the acquisition process unit is defeated
Revised double measurement signal out,
Wherein, when the system is in calibration mode, according to the temperature data of the Fibre Optical Sensor ring and than difference data
Between corresponding relationship determine the temperature compensation coefficient.
In one possible implementation, the system also includes：
Standard current transformer is applied with rated current in the ampere wires of the primary side of the standard current transformer,
The secondary side of the standard current transformer exports secondary standard signal；
Combining unit is connected respectively to the standard current transformer and the acquisition process unit, based on described secondary
Standard signal and the double measurement signal obtain merging data；
Unit is demarcated, the combining unit and the temperature measuring unit are connected respectively to, ratio is obtained based on the merging data
Difference data, and based on described than difference data and the temperature data, obtain the temperature compensation coefficient of the Fibre Optical Sensor ring；
Wherein, when the system is in calibration mode, the Fibre Optical Sensor ring is disposed in the temperature that temperature can be arranged
In case, and in the ampere wires of the Fibre Optical Sensor ring set primary side that is located at the standard current transformer.
In one possible implementation, the Fibre Optical Sensor ring including sensing ring skeleton and is fixed on the sensing
Reflecting mirror and wave plate in ring skeleton.
In one possible implementation, the temperature measuring unit includes fluorescence temperature-measuring optical fiber probe, fluorescence temperature-measuring optical fiber
With thermometric demodulator circuit, wherein the fluorescence temperature-measuring optical fiber probe is fixed in the sensing ring skeleton, to measure the optical fiber
The temperature of ring is sensed, and temperature data is sent to the thermometric demodulator circuit via the fluorescence temperature-measuring optical fiber.
In one possible implementation, the calibration unit includes that verification subelement and penalty coefficient generate son list
Member, the verification subelement are connect with the combining unit, compare difference data based on merging data acquisition；The penalty coefficient
Subelement is generated to connect with the verification subelement and the temperature measuring unit, be based on it is described than difference data and the temperature data,
Obtain the temperature compensation coefficient of the Fibre Optical Sensor ring.
In one possible implementation, the system also includes optical fiber insulator, the optical cables of the Fibre Optical Sensor ring
The acquisition process unit and the thermometric solution are led to from the pre-buried channel of the optical fiber insulator with the fluorescence temperature-measuring optical fiber
Adjust circuit.
In one possible implementation, the system also includes temperature warning units, are connected to the thermometric list
Between the first and described temperature compensation unit, outputting alarm flag bit.
According to another aspect of the present disclosure, a kind of temperature-compensation method of all-fiber current transformator is provided, is applied to
In all-fiber current transformator system with temperature-compensating.The method includes：
Obtain the temperature of Fibre Optical Sensor ring；
Obtain the information of alarm flag bit；
The alarm flag bit is judged, if it is 1, issues alarm, and directly export double measurement signal；If
It is 0, then temperature-compensating amendment is carried out to the double measurement signal based on temperature compensation coefficient, export revised double measurement
Signal.
In one possible implementation, the method also includes：
Start incubator, is changed the temperature of incubator to set rate within the set range；
Obtain the ratio difference data of each temperature spot；
The Fibre Optical Sensor ring is acquired in the temperature data of each temperature spot；
According to the ratio difference data and temperature data of each temperature spot, temperature-is than poor mapping relations；
Based on the temperature-than poor mapping relations calculate integer temperature spot within the set range than difference average value, generate
Temperature compensation coefficient.
The disclosure, than the repeat property of difference, passes through integrated thermometric using the Fibre Optical Sensor circumstance temperature degree of all-fiber current transformator
Unit and temperature compensation unit, the temperature compensation coefficient of the Fibre Optical Sensor ring determined when being in calibration mode using system, are realized
Temperature-compensating to all-fiber current transformator accurately, in real time, reliably carries out the measurement error of all-fiber current transformator
Temperature adjustmemt.
According to below with reference to the accompanying drawings to detailed description of illustrative embodiments, the other feature and aspect of the disclosure will become
It is clear.
Detailed description of the invention
Comprising in the description and constituting the attached drawing of part of specification and specification together illustrates the disclosure
Exemplary embodiment, feature and aspect, and for explaining the principles of this disclosure.
Fig. 1 shows the block diagram of the all-fiber current transformator system with temperature-compensating according to one embodiment of the disclosure；
Fig. 2 shows the thermometrics in the all-fiber current transformator system with temperature-compensating according to one embodiment of the disclosure
The block diagram of unit；
Fig. 3 shows the all-fiber current transformator system with temperature-compensating according to one embodiment of the disclosure in calibration mold
Block diagram under formula；
Fig. 4 is shown in the temperature-compensation method according to the all-fiber current transformator of one embodiment of the disclosure to Fibre Optical Sensor
The flow chart that ring is demarcated；
Fig. 5 shows the flow chart of the temperature-compensation method of the all-fiber current transformator according to one embodiment of the disclosure.
Specific embodiment
Various exemplary embodiments, feature and the aspect of the disclosure are described in detail below with reference to attached drawing.It is identical in attached drawing
Appended drawing reference indicate element functionally identical or similar.Although the various aspects of embodiment are shown in the attached drawings, remove
It non-specifically points out, it is not necessary to attached drawing drawn to scale.
Dedicated word " exemplary " means " being used as example, embodiment or illustrative " herein.Here as " exemplary "
Illustrated any embodiment should not necessarily be construed as preferred or advantageous over other embodiments.
In addition, giving numerous details in specific embodiment below to better illustrate the disclosure.
It will be appreciated by those skilled in the art that without certain details, the disclosure equally be can be implemented.In some instances, for
Method, means, element and circuit well known to those skilled in the art are not described in detail, in order to highlight the purport of the disclosure.
Fig. 1 shows the block diagram of the all-fiber current transformator system with temperature-compensating according to one embodiment of the disclosure.
As shown in Figure 1, the system includes Fibre Optical Sensor ring 10, acquisition process unit 20, temperature measuring unit 30, temperature compensation unit 40.
Fibre Optical Sensor ring 10 includes the sensing ring skeleton 11 being made of optical fiber and is fixed on anti-in sensing ring skeleton 11
Penetrate mirror 12 and wave plate 13 (such as quarter wave plate).Reflecting mirror 12 and wave plate 13 are the key that all-fiber current transformator current senses
Component.
Acquisition process unit 20 is the signal processing unit for carrying out photoelectric signal transformation, demodulation, modulation, and main includes carrying out
The circuit part of the light path part and signal processing of optical information conversion and photoelectric conversion.
Acquisition process unit 20 is connected to Fibre Optical Sensor ring 10, generates the optical signalling for entering Fibre Optical Sensor ring 10, and right
The optical signalling that Fibre Optical Sensor ring 10 generates under the function of current to be measured carries out photoelectric conversion and signal processing is secondary to generate
Measuring signal.
Specifically, system in the normal mode of operation, as shown in Figure 1, light source 201 issue light through coupler 202, be polarized
After device 203, it is divided into the orthogonal linearly polarized light of two beams, is transmitted to optical fiber along two holotypes of X, Y of polarization maintaining optical fibre delay line 205
Sense ring 10.At the wave plate of λ/4 13 of Fibre Optical Sensor ring 10, two bunch polarisations are converted to left-handed and dextrorotation rotatory polarization,
Into the sensor fibre for constituting sensing ring skeleton 11.In sensor fibre, under the action of electric current to be measured, due to Faraday magneto-optical
Effect effect, two beam rotatory polarization transmission speeds are different, to generate faraday's difference.When two beam rotatory polarizations are transferred to sensor fibre
When end, mirror-reflection occurs at reflecting mirror 12, two-beam has carried out modes swap, i.e., left-handed change dextrorotation, and dextrorotation becomes left-handed,
It is returned later along original optical path, Faraday effect doubles, and the line for being again transformed at the wave plate of λ/4 13 two beam orthogonal modes is inclined
Light, mode are equally exchanged.Finally, the two-beam for carrying Faraday effect phase information occurs to do at the polarizer 203
It relates to, then enters photodetector 206 through coupler 202, the interference light intensity signal exported from photodetector 206 is exported to after
Continuous signal processing circuit.Wherein, A/D conversion circuit 207 carries out A/D conversion to the light intensity signal for carrying current information, and institute is defeated
Digital signal out is after preposition amplification path 208, demodulator circuit 209, cumulative integrating circuit 210, filter circuit 211, by believing
Number output circuit 212 exports the double measurement signal generated under the function of current to be measured.
Wherein, demodulator circuit 209, cumulative integrating circuit 210, filter circuit 211 and signal output setting are in CPU processing
On circuit board 200.
Fig. 2 shows the thermometrics in the all-fiber current transformator system with temperature-compensating according to one embodiment of the disclosure
The block diagram of unit.Temperature measuring unit 30 is used to obtain the temperature data of Fibre Optical Sensor ring 10.As shown in Fig. 2, temperature measuring unit 30 includes
Fluorescence temperature-measuring optical fiber probe 31, fluorescence temperature-measuring optical fiber 32, thermometric demodulator circuit 33.Wherein, fluorescence temperature-measuring optical fiber probe 31 with penetrate
Mirror 12, wave plate 13 are fixed on together in the sensing ring skeleton 11 of primary side high-voltage field, measure the environment of Fibre Optical Sensor ring 10 nearby
Temperature data.Fluorescence temperature-measuring optical fiber 32 is connect with fluorescence temperature-measuring optical fiber probe 31, and temperature data is passed by fluorescence temperature-measuring optical fiber 32
It is directed at the thermometric demodulator circuit 33 of secondary low-voltage side.
Fluorescence temperature-measuring optical fiber probe 31 is capable of the temperature of precise measurement optical fiber sensing ring；32 high-voltage isulation of fluorescence temperature-measuring optical fiber
And electromagnetism interference, so that system no drift stable and reliable in work；Thermometric demodulator circuit 33 is preferably integrated in CPU processing circuit plate
On 200, so that the integrated height of system, compact and flexible and convenient for safeguarding.
Temperature compensation unit 40 is connected respectively to acquisition process unit 20 and temperature measuring unit 30, is measured based on temperature measuring unit 30
The temperature data of obtained Fibre Optical Sensor ring 10, in conjunction with the temperature compensation coefficient being solidificated in inside temperature compensation unit 40 to acquisition
The double measurement signal of processing unit 20 carries out temperature-compensating amendment, so that acquisition process unit exports revised double measurement
Signal.
Before system is able to carry out normal work, it is necessary first under calibration mode to the Fibre Optical Sensor ring in system into
Rower is fixed, i.e., by the temperature data of acquisition Fibre Optical Sensor ring 10 and than the corresponding relationship between difference data, so that it is determined that optical fiber
Sense the temperature compensation coefficient of ring 10.
Refer to secondary volume of the survey signal through current transformer that all-fiber current transformator system actually generates than difference data
Difference after rated transformation ratio transformation with primary side real input signal, to the percentage of primary side real input signal.It is more same than difference data
Sample can be obtained when system is in calibration mode.
Fig. 3 shows the all-fiber current transformator system with temperature-compensating according to one embodiment of the disclosure in calibration mold
Block diagram under formula.When system is in calibration mode, compared to normal mode of operation, need to increase standard current transformer 110,
Combining unit 120 and calibration unit 130, and the Fibre Optical Sensor ring 10 of pending calibration needs to be arranged in that temperature can be arranged
Incubator 100 in.Under calibration mode, the structure of system is as shown in Figure 3.
Fibre Optical Sensor ring 10 is set in the ampere wires of the primary side of standard current transformer 110, normalized current mutual inductance
The primary side of device 110 generates rated current and is applied on ampere wires.The ampere wires are usually high current electric wire.Normalized current
The secondary side of mutual inductor 110 exports secondary standard signal.
Acquisition process unit 20 is similar to its working method in the operational mode under calibration mode.Acquisition process unit
20 are connected to Fibre Optical Sensor ring 10, generate the optical signalling for entering Fibre Optical Sensor ring 10, and to Fibre Optical Sensor ring 10 in standard electric
The lower optical signalling generated of rated current effect in the ampere wires of the primary side of current transformer 100 carry out photoelectric conversion and
Signal processing is to generate double measurement signal.
Temperature measuring unit 30 is similar to its working method in the operational mode under calibration mode.Temperature measuring unit 30 passes through glimmering
Flash ranging temperature fibre-optical probe 31 obtains the temperature data of Fibre Optical Sensor ring 10, passes through the conduction of fluorescence temperature-measuring optical fiber 32 to secondary low-voltage side
Thermometric demodulator circuit 33, to obtain the temperature data of Fibre Optical Sensor ring 10.
Combining unit 120 is connected respectively to standard current transformer 110 and acquisition process unit 20, mutual based on normalized current
The double measurement signal that the secondary standard signal and acquisition process unit 20 that sensor 110 exports export, obtains the merging number of the two
According to.Calibration unit 130 is connected respectively to combining unit 120 and temperature measuring unit 30, the merging data exported based on combining unit 120
It obtains the ratio difference data of secondary standard signal and double measurement signal, and is exported based on described than difference data and temperature measuring unit 30
Temperature data obtains the temperature compensation coefficient of Fibre Optical Sensor ring 10.
In one example, calibration unit 130 includes that verification subelement and penalty coefficient generate subelement.The syndrome list
Member is connect with combining unit 120, compares difference data based on the merging data acquisition that combining unit 120 exports；The penalty coefficient generates
Subelement with verification subelement and temperature measuring unit 30 connect, be based on it is described than difference data and the temperature data, obtain the light
The temperature compensation coefficient of fibre sensing ring.
Fig. 4 is shown in the temperature-compensation method according to the all-fiber current transformator of one embodiment of the disclosure to Fibre Optical Sensor
The flow chart that ring is demarcated.It specifically, can be by method as shown in Figure 4 to optical fiber when system is in calibration mode
Sensing ring is demarcated, to obtain the temperature compensation coefficient of Fibre Optical Sensor ring.As shown in figure 4, this method may include step
S101 to step S105.
In step s101, start incubator, be changed the temperature of incubator to set rate within the set range, and
It can be from the low temperature in setting range to high temperature circulation.
For example, making it carry out high/low temperature circulation according to the temperature rate of -40 to+70 DEG C, 1 DEG C/min after starting incubator.
In step s 102, the ratio difference data of each temperature spot is obtained.
Specifically, in each of Temperature of Warm Case change procedure temperature spot, secondary standard signal and secondary survey are all utilized
Amount signal carries out difference operation and compares difference data to obtain.For example, by according to an embodiment of the present disclosure complete with temperature-compensating
Optical fiber current mutual inductor default is calibration mode, in each temperature spot, using combining unit 120 to normalized current mutual inductance
The double measurement signal that the secondary standard signal and acquisition process unit 20 that device 110 exports export carries out data merging, and is marking
The data exported in the verification subelement of order member 130 to combining unit 120 are carried out than difference operation, to obtain the ratio of the temperature spot
Difference data.In this way, the ratio difference data of each temperature spot can be obtained.
In step s 103, the Fibre Optical Sensor ring is acquired in the temperature data of each temperature spot.
For example, being mark by the all-fiber current transformator default according to an embodiment of the present disclosure with temperature-compensating
Mould-fixed obtains the temperature data of Fibre Optical Sensor ring 10 using fluorescence temperature-measuring optical fiber probe 31, by glimmering in each temperature spot
Light temperature-measuring optical fiber 32 is conducted to the thermometric demodulator circuit 33 of secondary low-voltage side, to obtain Fibre Optical Sensor ring 10 in each temperature
The temperature data of point.
In step S104, according to the ratio difference data and temperature data of each temperature spot, temperature data and than difference
Corresponding relationship between data, i.e. temperature-are than poor mapping relations.
In step s105, poorer than the ratio that poor mapping relations calculate integer temperature spot within the set range flat based on temperature-
Mean value generates temperature compensation coefficient.
Based on the temperature-determined in step S104 than poor mapping relations, fit within the set range in all integers
Temperature spot than difference average value, to generate the temperature compensation coefficient in each integer temperature spot.In a kind of possible realization side
In formula, this system further includes optical fiber insulator 50, and the optical cable and fluorescence temperature-measuring optical fiber 32 of Fibre Optical Sensor ring 10 are from optical fiber insulator
50 pre-buried channel leads to acquisition process unit 20 and thermometric demodulator circuit 33.Optical fiber insulator 50 is that power high voltage insulation is set
It is standby, for connecting primary side and secondary side power equipment, play the role of support, insulation.
In one possible implementation, this system further includes temperature warning unit 60, is connected to temperature measuring unit 30
Between temperature compensation unit 40, outputting alarm flag bit.Alarm flag bit is perhaps 0 or is 1.
Fig. 5 shows the flow chart of the temperature-compensation method of the all-fiber current transformator according to one embodiment of the disclosure.Such as
Shown in Fig. 5, this method may include step S201 to step S205.
In step s 201, the temperature of Fibre Optical Sensor ring is obtained.
For example, using glimmering in the all-fiber current transformator system according to an embodiment of the present disclosure with temperature-compensating
Flash ranging temperature fibre-optical probe 31 obtains the temperature data of Fibre Optical Sensor ring 10, passes through the conduction of fluorescence temperature-measuring optical fiber 32 to secondary low-voltage side
Thermometric demodulator circuit 33, to obtain the real time temperature of Fibre Optical Sensor ring 10.
In step S202, the information of alarm flag bit is obtained.
For example, obtaining according in the all-fiber current transformator system with temperature-compensating of embodiment of the disclosure, temperature
The alarm flag bit of Alarm Unit 60.
In step S203, the alarm flag bit is judged.If it is 1, then illustrates temperature anomaly, execute at this time
Step S204 thens follow the steps S205 if it is 0.
In step S204, alarm is issued, and directly export double measurement signal, without temperature-compensating.
In step S205, temperature-compensating amendment, output amendment are carried out to double measurement signal based on temperature compensation coefficient
Double measurement signal afterwards.
By the way that temperature warning function is arranged, alarm, closing temperature compensation mechanism, high reliablity are issued when temperature anomaly.
The temperature compensation coefficient obtained under calibration mode using the system of the disclosure, in system work according to temperature wave
Dynamic real-time compensation, closed loop output are as a result, precision is up to 0.02s grades at -40 to+70 DEG C.
The presently disclosed embodiments is described above, above description is exemplary, and non-exclusive, and
It is not limited to disclosed each embodiment.Without departing from the scope and spirit of illustrated each embodiment, for this skill
Many modifications and changes are obvious for the those of ordinary skill in art field.The selection of term used herein, purport
In principle, the practical application or to the technological improvement in market for best explaining each embodiment, or make the art its
Its those of ordinary skill can understand each embodiment disclosed herein.
Claims (9)
1. a kind of all-fiber current transformator system with temperature-compensating, which is characterized in that the system comprises：
Fibre Optical Sensor ring；
Acquisition process unit is connected to the Fibre Optical Sensor ring, generates the optical signalling for entering the Fibre Optical Sensor ring, and to institute
State that the optical signalling that Fibre Optical Sensor ring generates under the function of current to be measured carries out photoelectric conversion and signal processing is secondary to generate
Measuring signal；
Temperature measuring unit obtains the temperature data of the Fibre Optical Sensor ring；
Temperature compensation unit is connected respectively to the acquisition process unit and the temperature measuring unit, is based on the temperature data, knot
It closes temperature compensation coefficient and temperature-compensating amendment is carried out to the double measurement signal, so that acquisition process unit output amendment
Double measurement signal afterwards,
Wherein, when the system is in calibration mode, according to the temperature data of the Fibre Optical Sensor ring and than between difference data
Corresponding relationship determine the temperature compensation coefficient.
2. system according to claim 1, which is characterized in that the system also includes：
Standard current transformer is applied with rated current in the ampere wires of the primary side of the standard current transformer, described
The secondary side of standard current transformer exports secondary standard signal；
Combining unit is connected respectively to the standard current transformer and the acquisition process unit, is based on the secondary standard
Signal and the double measurement signal obtain merging data；
Unit is demarcated, the combining unit and the temperature measuring unit are connected respectively to, difference is compared based on merging data acquisition
According to, and based on described than difference data and the temperature data, obtain the temperature compensation coefficient of the Fibre Optical Sensor ring；
Wherein, when the system is in calibration mode, the Fibre Optical Sensor ring is disposed in and can be arranged in the incubator of temperature,
And in the ampere wires of the Fibre Optical Sensor ring set primary side that is located at the standard current transformer.
3. system according to claim 1, which is characterized in that the Fibre Optical Sensor ring includes sensing ring skeleton and fixation
Reflecting mirror and wave plate in the sensing ring skeleton.
4. system according to claim 2, which is characterized in that the temperature measuring unit includes that fluorescence temperature-measuring optical fiber pops one's head in, is glimmering
Light temperature-measuring optical fiber and thermometric demodulator circuit, wherein the fluorescence temperature-measuring optical fiber probe is fixed in the sensing ring skeleton, to survey
The temperature of the Fibre Optical Sensor ring is measured, and temperature data is sent to the thermometric via the fluorescence temperature-measuring optical fiber and demodulates electricity
Road.
5. system according to claim 2, which is characterized in that the calibration unit includes verification subelement and penalty coefficient
Subelement is generated, the verification subelement is connect with the combining unit, compares difference data based on merging data acquisition；It is described
Penalty coefficient generates subelement and connect with the verification subelement and the temperature measuring unit, based on described than difference data and the temperature
Degree evidence obtains the temperature compensation coefficient of the Fibre Optical Sensor ring.
6. system according to claim 4, which is characterized in that the system also includes optical fiber insulator, the optical fiber is passed
Feel ring optical cable and the fluorescence temperature-measuring optical fiber from the pre-buried channel of the optical fiber insulator lead to the acquisition process unit and
The thermometric demodulator circuit.
7. system according to claim 6, which is characterized in that the system also includes temperature warning units, are connected to
Between the temperature measuring unit and the temperature compensation unit, outputting alarm flag bit.
8. a kind of temperature-compensation method of all-fiber current transformator, applied to the all-fiber current transformator for having temperature-compensating
In system, which is characterized in that the method includes：
Obtain the temperature of Fibre Optical Sensor ring；
Obtain the information of alarm flag bit；
The alarm flag bit is judged, if it is 1, issues alarm, and directly export double measurement signal；If it is 0,
Temperature-compensating amendment is then carried out to double measurement signal based on temperature compensation coefficient, exports revised double measurement signal.
9. according to the method described in claim 8, it is characterized in that, the method is also when the system is in calibration mode
Including：
Start incubator, is changed the temperature of incubator to set rate within the set range；
Obtain the ratio difference data of each temperature spot；
The Fibre Optical Sensor ring is acquired in the temperature data of each temperature spot；
According to the ratio difference data and temperature data of each temperature spot, temperature data with than between difference data it is corresponding pass
System；
Based on temperature data and poorer than the ratio that the corresponding relationship between difference data calculates integer temperature spot within the set range average
Value generates temperature compensation coefficient.
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110988452A (en) * | 2019-11-28 | 2020-04-10 | 北京自动化控制设备研究所 | Precise temperature compensation method for optical fiber current transformer |
| CN111638480A (en) * | 2020-06-09 | 2020-09-08 | 广东省计量科学研究院（华南国家计量测试中心） | Current sensor calibration system and method based on temperature compensation |
| CN111650418A (en) * | 2020-06-12 | 2020-09-11 | 江苏易立电气股份有限公司 | Temperature compensation method for intelligent low-voltage shunt sensor |
| CN112763782A (en) * | 2020-12-14 | 2021-05-07 | 河南平高电气股份有限公司 | All-fiber sensing ring of current transformer |
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