CN110174541A - Novel high-precision current transformer suitable for GIS - Google Patents
Novel high-precision current transformer suitable for GIS Download PDFInfo
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- CN110174541A CN110174541A CN201910265974.5A CN201910265974A CN110174541A CN 110174541 A CN110174541 A CN 110174541A CN 201910265974 A CN201910265974 A CN 201910265974A CN 110174541 A CN110174541 A CN 110174541A
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- current
- quantum
- current transformer
- magnetic field
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Classifications
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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
- G01R15/18—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using inductive devices, e.g. transformers
-
- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01F—MAGNETS; INDUCTANCES; TRANSFORMERS; SELECTION OF MATERIALS FOR THEIR MAGNETIC PROPERTIES
- H01F38/00—Adaptations of transformers or inductances for specific applications or functions
- H01F38/20—Instruments transformers
- H01F38/22—Instruments transformers for single phase ac
- H01F38/28—Current transformers
- H01F38/30—Constructions
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measuring Instrument Details And Bridges, And Automatic Balancing Devices (AREA)
Abstract
Embodiment of the present invention provides a kind of novel high-precision current transformer suitable for GIS, belongs to the Technology of Precision Measurement field of electric current.The GIS includes at least one current-carrying conductor and protection shell; the current transformer includes: multiple quantum sensors; for measuring the magnetic field strength around the every current-carrying conductor; the 4n quantum sensors are at least evenly equipped in the virtual circumference of radius as the center of circle, predetermined length using the central axis of current-carrying conductor described in every; the periphery of each virtual circumference is provided with magnetic masking layer; wherein, n is positive integer；Quantum detection system is connect with each quantum sensor respectively, for obtaining the magnetic field strength around the current-carrying conductor by the quantum sensor, and calculates according to the magnetic field strength electric current of the every current-carrying conductor.
Description
Technical field
The present invention relates to the Technology of Precision Measurement fields of electric current, more particularly to a kind of novel high-precision suitable for GIS
Current transformer.
Background technique
GIS (Gas Insulated Switchgear, gas-insulating and fully-enclosed combined electrical apparatus) by breaker, keep apart
The composition such as pass, earthing switch, mutual inductor, arrester, bus, connector and outlet terminal, these equipment or component are all closed
In the shell of metallic ground, inside it filled with the SF of certain pressure6Insulating gas, therefore also referred to as SF6Fully closed combined electric unit.
With the continuous propulsion that smart grid is built, traditional high voltage electric equipment is gradually to intelligence, modularization, small-sized
Change, multi-functional and non-maintaining direction is developed.Traditional electromagnetic type current measuring device due to measurement frequency band it is narrow, dynamic range is small,
Output is the reasons such as analog quantity, it is difficult to adapt to the demand for development of smart grid.Current measurement dress based on Faraday magnetooptical effect
Set simple, big, light-weight, small in size, the output signal number without magnetic saturation and ferromagnetic resonance, transient response range with insulation system
The advantages that word, has adapted to the developing direction of smart grid, has been increasingly used in various New Generation of Intelligent substations
In.However, the current measuring device based on Faraday magnetooptical effect but exposes many problems in practical engineering applications, such as electricity
The anti-interference problem of sub- device and optical device, temperature drift problem, precision problem etc..
Summary of the invention
The purpose of embodiment of the present invention is to provide a kind of novel high-precision current transformer suitable for GIS, the electric current
Mutual inductor can overcome numerous defects of traditional current detection means, measure electric current more accurately.
To achieve the goals above, embodiment of the present invention provides a kind of novel high-precision Current Mutual Inductance suitable for GIS
Device, the GIS include current-carrying conductor and protection shell, the central axis weight of the central axis of the current-carrying conductor and the protection shell
It closes and the current-carrying conductor and the protection shell cooperatively forms insulated cavity, the current transformer includes:
Multiple quantum sensors, for measuring the magnetic field strength around the every current-carrying conductor, with current-carrying described in every
The central axis of conductor is the center of circle, predetermined length is that the 4n quantum sensors are at least evenly equipped in the virtual circumference of radius, often
The periphery of a virtual circumference is provided with magnetic masking layer, wherein n is positive integer；
Quantum detection system is connect with each quantum sensor respectively, for being obtained by the quantum sensor
Magnetic field strength around the current-carrying conductor, and calculate according to the magnetic field strength electric current of the every current-carrying conductor.
Optionally, the quantum sensor includes microwave antenna and NV colour center element；
The current transformer further comprises laser generator, and the laser generator is used for the NV colour center element
Emit laser signal；
The microwave antenna is used to emit microwave signal to the NV colour center element, and the NV colour center element is for receiving
In the case where the laser signal and the microwave signal, feedback signal is generated according to the magnetic field strength of surrounding；
The quantum detection system is further connect with the microwave antenna, the laser generator, described for controlling
The work of microwave antenna, the laser generator, and the electric current is calculated by the feedback signal.
Optionally, the wavelength of the laser signal is 532nm.
Optionally, the quantum detection system is electrically connected with the microwave antenna, the laser generator by optical fiber with
The NV colour center element connection.
Optionally, be provided with the first lens group at the input port of the NV colour center element, first lens group for pair
The laser signal carries out convergence processing.
Optionally, the equipped at outlet port of the NV colour center element is provided with the second lens group and photoelectric converter, and described second
Lens group is used to converge the feedback signal of the NV colour center element, and the photoelectric converter is used to believe the feedback signal from light
Number mode is converted to electrical signal pattern.
Optionally, the quantum detection system is further used for calculating the electric current according to formula (1),
Wherein,For the vector of the magnetic field strength of each quantum sensor measurement, μ0For magnetic conductivity, I is the electricity
Stream,For sense of current,For the vector of the radius of the virtual circumference, r is the radius of the virtual circumference.
Optionally, the current transformer further comprises poly- magnetic core, and the poly- magnetic core is arc, is arranged described
Between quantum sensor described in every two in virtual circumference, the measurement essence of the quantum sensor is improved for converging magnetic field
Degree.
Through the above technical solutions, the novel high-precision current transformer provided by the invention suitable for GIS by using
The principle of quantum detection solves the survey of conventional current measuring device instead of the mode of conventional current measuring device measurement electric current
The technical issues of accuracy of measurement is restricted by temperature improves the precision of measurement electric current.
The other feature and advantage of embodiment of the present invention will the following detailed description will be given in the detailed implementation section.
Detailed description of the invention
Attached drawing is to further understand for providing to embodiment of the present invention, and constitute part of specification, with
Following specific embodiment is used to explain the present invention embodiment together, but does not constitute the limit to embodiment of the present invention
System.In the accompanying drawings:
Fig. 1 is the schematic diagram of the setting position of quantum sensor in the case where GIS only includes a current-carrying conductor；
Fig. 2 is the schematic diagram of the setting position of quantum sensor in the case where GIS includes three current-carrying conductors；
Fig. 3 is the structure of the novel high-precision current transformer suitable for GIS according to embodiment of the present invention
Block diagram；
Fig. 4 is the schematic diagram of NV colour center electron transition according to embodiment of the present invention；And
Fig. 5 is the setting location drawing of poly- magnetic core according to embodiment of the present invention.
Description of symbols
01, current-carrying conductor 02, protection shell
03, quantum sensor 04, quantum detection system
05, magnetic masking layer 06, microwave antenna
07, NV colour center element 08, laser generator
09, the first lens group 10, the second lens group
11, photoelectric converter 12, poly- magnetic core
Specific embodiment
It is described in detail below in conjunction with specific embodiment of the attached drawing to embodiment of the present invention.It should be understood that
Embodiment that the specific embodiments described herein are merely illustrative of the invention is not intended to restrict the invention implementation
Mode.
In the application embodiment, in the absence of explanation to the contrary, the noun of locality used such as " upper and lower, top, bottom "
Usually for direction shown in the drawings either for it is vertical, vertically or on gravity direction for each component it is mutual
Positional relationship describes word.
In addition, if relating to the description of " first ", " second " etc. in the application embodiment, it should " first ", " second "
Deng description be used for description purposes only, be not understood to indicate or imply its relative importance or implicitly indicate indicated
The quantity of technical characteristic." first " is defined as a result, the feature of " second " can explicitly or implicitly include at least one and be somebody's turn to do
Feature.It in addition, the technical solution between each embodiment can be combined with each other, but must be with ordinary skill people
Based on member can be realized, this technical solution will be understood that when the combination of technical solution appearance is conflicting or cannot achieve
Combination be not present, also not this application claims protection scope within.
The present invention provides a kind of novel high-precision current transformer suitable for GIS.Wherein, GIS includes that at least one carries
Current conductor 01 and protection shell 02.In an embodiment of the invention, which may include
Multiple quantum sensors 03 and quantum detection system 04.
Multiple quantum sensors 03 can be used for measuring the magnetic field strength around every tested current-carrying conductor 01.In the implementation
In mode, it is contemplated that quantum detection system 04 needs using Ampère circuital theorem and finishes when calculating the electric current of current-carrying conductor 01
Ao Safeier law is being the imaginary circles of radius by the center of circle, predetermined length of central shaft then being directed to every current-carrying conductor 01
4n quantum sensor 03 can be at least evenly equipped on week.Wherein, n is positive integer.In addition, in order to avoid each current-carrying conductor 01
Between magnetic field interfere with each other, magnetic masking layer 05 can be set in the periphery of each virtual circumference.
It is only to include the case where that the quantity of a current-carrying conductor 01 and quantum sensor 03 is 4 in GIS as shown in Figure 1
Under, the schematic diagram of the setting position of quantum sensor 03.In Fig. 1, quantum sensor 03 is fixed on magnetic masking layer 05.The magnetic
Shielded layer 05 can be connect with the protection shell 02 of GIS.
Be as shown in Figure 2 in the case where the quantity that GIS includes three current-carrying conductors 01 and quantum sensor 03 is 12,
The schematic diagram of the setting position of quantum sensor 03.In Fig. 2,4 are evenly equipped in the every corresponding virtual circumference of current-carrying conductor 01
A quantum sensor 03, each quantum sensor 03 are fixed on magnetic masking layer 05.
Quantum detection system 04 can be connect with each quantum sensor 03 respectively, for being obtained by quantum sensor 03
Magnetic field strength around current-carrying conductor 01, and according to the electric current of magnetic field strength calculating current-carrying conductor 01.For the quantum detection system
System 04, can be the host computer or PC machine for being built-in with predetermined software, be also possible to be built-in with the general processor of pre-set programs, specially
With processor, conventional processors, digital signal processor (DSP), multi-microprocessor, it is associated with DSP core one or
Multi-microprocessor, microcontroller, specific integrated circuit (ASIC), field programmable gate array (FPGA) circuit, is appointed at controller
What other types of integrated circuit (IC), state machine, system level chip (SOC) etc..
For quantum sensor 03, it can be a variety of quantum sensors known to those skilled in the art.But of the invention one
In a example, which may include microwave antenna 06 and NV colour center element 07.NV colour center element 07 (can be such as
Diamond) in electronics there are three kinds of ground state:
The energy corresponding wavelength of every kind of ground state and excitation state is 637nm.So when NV colour center element 07 is being less than
When the laser irradiation of 637nm wavelength, the electronics in ground state is absorbed by energy jump to excitation state, but due in excitation state
Electronics it is unstable, therefore the electronics can transit to ground state again, and electronics can be released externally from the process that excitation state transits to ground state
Energy, so that NV colour center element 07 issues red fluorescence (electron transition release photon).It, can be with based on above-mentioned physical phenomenon
Realize the electron-spin polarization of NV colour center to ground state m in such a way that laser is irradiated NV colour center element 07sOn=0.
In view of the research of the prior art has been able to the polarizability of the electronics of NV colour center reaching 90% or more, at low ambient temperatures very
100% can extremely be reached.Therefore, the electron spin state of NV colour center can be judged by the fluorescence that the NV colour center of element generates.
So, in this example, which may further include laser generator 08.The laser generator
08 can be used for emitting laser to NV colour center element 07 so that the electron spin of the NV colour center of the NV colour center element 07 is to ground state
msOn=0.
When the outside of NV colour center element 07 is there are when magnetic field, according to the theory of Zeemen effect, energy occurs for the electrons of ground state
Grade division.As shown in figure 3, there are 1/2 spins for electronics itself, under the environmental condition of externally-applied magnetic field, electronics can split into two
A energy level.When applying the electromagnetic wave with the frequency equal with the energy level spacing of the two energy levels to electronics, electricity will lead to
In the phenomenon that transition between the energy levels (ESR, electron spin resonance) occurs for son.Further, pass through the calculating to the two difference on the frequencies
The magnetic field strength in the magnetic field outside NV colour center element 07 can be calculated.So in this example, microwave antenna 06 can be used for
Emit microwave signal to NV colour center element 07 to generate electron spin resonance phenomenon.The NV colour center element 07 can receive
In the case where (preset frequency) microwave signal, generated according to the magnetic field strength of surrounding (occur electron spin resonance phenomenon with) anti-
Feedback signal.In addition, the determination of the wavelength for the laser, can be a variety of known to those skilled in the art.At of the invention one
In preferable example, the wavelength of the laser can be such as 532nm.
In Fig. 2, quantum detection system 04 can further be connect with microwave antenna 06, laser generator 08, for controlling
The work of microwave antenna 06, laser generator 08 processed, and calculated in current-carrying conductor 03 by the feedback signal of NV colour center element 07
The electric current in portion.Specifically, since NV colour center element 07 is in the case where occurring electron spin resonance, in the feedback signal of generation
Red fluorescence is most weak, which can obtain ODMR (Optical by the analysis to feedback signal
Detection of Magnetic Resonance technique, optical detection magnetic resonance) spectrum, and further according to the ODMR
Spectrum calculates magnetic field strength detected by each quantum sensor 03.
Further, the magnetic field strength which can be detected based on each quantum sensor 03, root
The electric current in the current-carrying conductor 03 is calculated according to formula (1),
Wherein,For the vector of the magnetic field strength of each quantum sensor 03 measurement, μ0For magnetic conductivity, I is electric current,For
Sense of current,For the vector of the radius of virtual circumference, r is the radius of virtual circumference.
In addition, in order to reduce laser generator 08 transmitting laser signal to NV colour center element 07 the proportion of goods damageds.In the reality
It applies in mode, laser generator 08 can be connect by optical fiber with the input port of NV colour center element 07.Further, the optical fiber with
The first lens group 09 is also provided between the input port of NV colour center element 07.First lens group 09 can be used for laser
Signal carries out convergence processing.
Correspondingly, it can also be connected by optical fiber between quantum detection system 04 and NV colour center element 07, while in order to drop
For converging signal also can be set in the proportion of goods damageds of low feedback signal between the delivery outlet and optical fiber of NV colour center element 07
Two lens groups 10.It can also be with since quantum detection system 03 can only identify electric signal, between optical fiber and quantum detection system 04
It is provided with the photoelectric converter 11 for feedback signal to be converted to electrical signal pattern from light patterns.
In addition, in order to further increase the measurement accuracy of quantum sensor 03, in an embodiment of the invention, such as
Shown in Fig. 5, which may further include poly- magnetic core 12.The poly- magnetic core 12 can be arc, be arranged in void
Between every two quantum sensor 03 on quasi circle, the sensitivity of quantum sensor 03 is improved for converging magnetic field, thus
Quantum sensor 03 is improved to the measurement accuracy in magnetic field.
Through the above technical solutions, the novel high-precision current transformer provided by the invention suitable for GIS by using
The principle of quantum detection solves the survey of conventional current measuring device instead of the mode of conventional current measuring device measurement electric current
The technical issues of accuracy of measurement is restricted by temperature improves the precision of measurement electric current.
The optional embodiment of example of the present invention is described in detail in conjunction with attached drawing above, still, embodiment of the present invention is not
The detail being limited in above embodiment can be to of the invention real in the range of the technology design of embodiment of the present invention
The technical solution for applying mode carries out a variety of simple variants, these simple variants belong to the protection scope of embodiment of the present invention.
It is further to note that specific technical features described in the above specific embodiments, in not lance
In the case where shield, it can be combined in any appropriate way.In order to avoid unnecessary repetition, embodiment of the present invention
To various combinations of possible ways, no further explanation will be given.
It will be appreciated by those skilled in the art that realizing that all or part of the steps in above embodiment method is can to lead to
Program is crossed to instruct relevant hardware and complete, which is stored in a storage medium, including some instructions use so that
One (can be single-chip microcontroller, chip etc.) or processor (processor) execute each embodiment the method for the application
All or part of the steps.And storage medium above-mentioned includes: USB flash disk, mobile hard disk, read-only memory (ROM, Read-Only
Memory), random access memory (RAM, Random Access Memory), magnetic or disk etc. are various can store journey
The medium of sequence code.
In addition, any combination can also be carried out between a variety of different embodiments of embodiment of the present invention, as long as its
Without prejudice to the thought of embodiment of the present invention, embodiment of the present invention disclosure of that equally should be considered as.
Claims (8)
1. a kind of novel high-precision current transformer suitable for GIS, which is characterized in that the GIS includes at least one current-carrying
Conductor and protection shell, the current transformer include:
Multiple quantum sensors, for measuring the magnetic field strength around the every current-carrying conductor, with current-carrying conductor described in every
Central axis be the center of circle, predetermined length is that 4n quantum sensors, Mei Gesuo are at least evenly equipped in the virtual circumference of radius
The periphery for stating virtual circumference is provided with magnetic masking layer, wherein n is positive integer；
Quantum detection system is connect with each quantum sensor respectively, described in being obtained by the quantum sensor
Magnetic field strength around current-carrying conductor, and calculate according to the magnetic field strength electric current of the every current-carrying conductor.
2. current transformer according to claim 1, which is characterized in that the quantum sensor includes microwave antenna and NV
Colour center element；
The current transformer further comprises laser generator, and the laser generator is used to emit to the NV colour center element
Laser signal；
The microwave antenna is used to emit microwave signal to the NV colour center element, and the NV colour center element is used for receiving
In the case where stating laser signal and the microwave signal, feedback signal is generated according to the magnetic field strength of surrounding；
The quantum detection system is further connect with the microwave antenna, the laser generator, for controlling the microwave
The work of antenna, the laser generator, and the electric current is calculated by the feedback signal.
3. current transformer according to claim 2, which is characterized in that the wavelength of the laser signal is 532nm.
4. current transformer according to claim 2, which is characterized in that the quantum detection system and the microwave antenna
Electrical connection, the laser generator are connect by optical fiber with the NV colour center element.
5. current transformer according to claim 4, which is characterized in that be provided at the input port of the NV colour center element
First lens group, first lens group are used to carry out convergence processing to the laser signal.
6. current transformer according to claim 4, which is characterized in that the equipped at outlet port of the NV colour center element is provided with
Second lens group and photoelectric converter, second lens group are used to converge the feedback signal of the NV colour center element, the light
Electric transducer is used to the feedback signal being converted to electrical signal pattern from light patterns.
7. current transformer according to claim 1, which is characterized in that the quantum detection system is further used for basis
Formula (1) calculates the electric current,
Wherein,For the vector of the magnetic field strength of each quantum sensor measurement, μ0For magnetic conductivity, I is the electric current,
For sense of current,For the vector of the radius of the virtual circumference, r is the radius of the virtual circumference.
8. current transformer according to claim 1, which is characterized in that the current transformer further comprises poly- magnet
Core, the poly- magnetic core are arc, are arranged between quantum sensor described in the every two in the virtual circumference, for converging
Magnetic field is to improve the measurement accuracy of the quantum sensor.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910265974.5A CN110174541A (en) | 2019-04-03 | 2019-04-03 | Novel high-precision current transformer suitable for GIS |
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| CN201910265974.5A CN110174541A (en) | 2019-04-03 | 2019-04-03 | Novel high-precision current transformer suitable for GIS |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN112213679A (en) * | 2020-10-22 | 2021-01-12 | 国网福建省电力有限公司 | Magnetic-sensing current transformer estimation method based on position information |
| CN113064033A (en) * | 2021-03-29 | 2021-07-02 | 广东电网有限责任公司 | Gas insulated switchgear and fault monitoring device thereof |
| CN113834963A (en) * | 2021-09-06 | 2021-12-24 | 国仪量子(合肥)技术有限公司 | Current detection device and method based on NV color center sensor and storage medium |
| CN113960345A (en) * | 2021-10-29 | 2022-01-21 | 国仪量子(合肥)技术有限公司 | Current detection method, device and storage medium |
| CN116660602A (en) * | 2023-07-25 | 2023-08-29 | 国网安徽省电力有限公司电力科学研究院 | Quantum transformer and current detection method |
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| CN112213679A (en) * | 2020-10-22 | 2021-01-12 | 国网福建省电力有限公司 | Magnetic-sensing current transformer estimation method based on position information |
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| CN116660602A (en) * | 2023-07-25 | 2023-08-29 | 国网安徽省电力有限公司电力科学研究院 | Quantum transformer and current detection method |
| CN116660602B (en) * | 2023-07-25 | 2024-03-22 | 国网安徽省电力有限公司电力科学研究院 | Quantum transformer and current detection method |
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