Remote calibration system of quantum current transformer

Abstract

The invention discloses a remote calibration system of a quantum current transformer, which comprises a laboratory standard frequency source, a satellite and the quantum current transformer, and is characterized in that the quantum current transformer is used for measuring a to-be-measured physical quantity of a to-be-measured field; the laboratory standard frequency source is used for converting the standard current source into a standard frequency source and sending the standard frequency source to the satellite; the satellite is connected with the quantum current transformer and used for sending the standard frequency source and the satellite local crystal oscillator frequency to the quantum current transformer.

Description

Technical Field

[0001] The present invention relates to the technical field of power sensor equipment calibration, and more specifically, to a remote calibration system for a quantum current transformer. Background Art

[0002] Accurate current, voltage and electric energy information is of great significance in the field of power systems. With the development of new power systems, on the one hand, large-scale grid-connected renewable energy power generation and nonlinear power equipment are increasing. New power systems show characteristics of wide dynamics, fast time-varying and strong randomness. The problems of observable and measurable power grids and equipment status monitoring are becoming more and more serious. The demand for multi-parameter measurement of electric field, magnetic field and temperature for wide-area measurement, line loss monitoring and equipment fault warning is further increased. On the other hand, the measurement results of massive measurement devices are offset due to various irreversible factors such as device aging and loss.

[0003] With the construction of the current new power system, many on-site measurement sensor devices need to be calibrated regularly, but a large number of measurement devices do not meet the calibration conditions after being connected to the network. Summary of the invention

[0004] In view of the deficiencies in the prior art, the present invention provides a remote calibration system for a quantum current transformer.

[0005] According to one aspect of the present invention, a remote calibration system for a quantum current transformer is provided, comprising: a laboratory standard frequency source, a satellite and a quantum current transformer, wherein

[0006] The quantum current transformer is used to measure the physical quantity to be measured in the field to be measured;

[0007] The laboratory standard frequency source is used to convert the standard current source into a standard frequency source and send it to the satellite;

[0008] The satellite is connected to the quantum current transformer for sending the standard frequency source and the satellite local crystal oscillator frequency to the quantum current transformer.

[0009] Optionally, the quantum current transformer comprises: a laser system, a diamond NV color center, a microwave system, a fluorescent signal and a data processing unit, wherein

[0010] The microwave source is used to emit microwaves in the frequency band of 2.5-3 GHz and radiate them to the diamond NV color center through the microwave antenna;

[0011] The laser system is used to generate a 532nm laser source to emit to the diamond NV color center;

[0012] The diamond NV color center senses the magnetic field excited by the standard frequency source and generates a red fluorescence signal under the action of microwave and laser sources;

[0013] The data processing unit converts the fluorescence signal into a photoelectric signal, converts it into a microwave frequency, and outputs the physical quantity to be measured according to the microwave frequency.

[0014] Optionally, the output power of the laser source is between 0.1 mW and 10 mW.

[0015] Optionally, the red fluorescence signal is transmitted to the data processing unit through a transmission optical path.

[0016] Optionally, a standard frequency source is used to calibrate errors caused by microwave systems, laser systems, transmission optical paths, and data processing systems.

[0017] Optionally, the satellite local crystal frequency is used to calibrate the frequency error of the microwave system.

[0018] Optionally, the physical quantities to be measured include electric field, magnetic field, current and voltage.

[0019] Therefore, the present invention is based on the quantum sensing principle and satellite remote timing remote calibration technology of electric power field quantum sensing equipment, including a laboratory standard frequency source, a satellite system and an electric power field quantum measurement sensor device, relying on the quantum properties of the diamond NV color center, the physical quantity to be measured is converted into a frequency quantity, the error of the frequency quantity comes from four parts, namely the microwave system, the laser system, the transmission optical path system and the data processing system, wherein the satellite can transmit the standard frequency to the microwave system of the electric power field quantum measurement sensor device through a local crystal oscillator, so as to calibrate the frequency of the microwave source, and the laboratory standard frequency source generates a set of standard frequencies through a set of standard current sources, and transmits them to the electric power field quantum measurement sensor device through a satellite, the standard frequency can eliminate the errors caused by the laser system, the transmission optical path system and the data processing system, the above remote calibration technology can realize the remote online calibration of massive power sensor devices, greatly improving the safe and stable operation of the power system. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] A more complete understanding of exemplary embodiments of the present invention may be obtained by referring to the following drawings:

[0021] Figure 1 It is a structural schematic diagram of a remote calibration system for a quantum current transformer provided by an exemplary embodiment of the present invention;

[0022] Figure 2 It is a schematic diagram of the principle of a laboratory standard frequency source provided by an exemplary embodiment of the present invention. DETAILED DESCRIPTION

[0023] Below, the exemplary embodiments according to the present invention will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments of the present invention, and it should be understood that the present invention is not limited to the exemplary embodiments described here.

[0024] It should be noted that the relative arrangement of components and steps, the numerical expressions and numerical values ​​set forth in these embodiments do not limit the scope of the present invention unless specifically stated otherwise.

[0025] Those skilled in the art can understand that the terms "first" and "second" in the embodiments of the present invention are only used to distinguish different steps, devices or modules, etc., and neither represent any specific technical meaning nor indicate the necessary logical order between them.

[0026] It should also be understood that, in the embodiments of the present invention, “plurality” may refer to two or more than two, and “at least one” may refer to one, two or more than two.

[0027] It should also be understood that any component, data or structure mentioned in the embodiments of the present invention can generally be understood as one or more, unless explicitly limited or otherwise indicated in the context.

[0028] In addition, the term "and / or" in the present invention is only a description of the association relationship of the associated objects, indicating that there can be three relationships. For example, A and / or B can represent: A exists alone, A and B exist at the same time, and B exists alone. In addition, the character " / " in the present invention generally indicates that the associated objects before and after are in an "or" relationship.

[0029] It should also be understood that the description of the various embodiments of the present invention focuses on the differences between the various embodiments, and the same or similar aspects thereof can be referenced to each other, and for the sake of brevity, they will not be described one by one.

[0030] At the same time, it should be understood that for the convenience of description, the sizes of the various parts shown in the drawings are not drawn according to the actual proportional relationship.

[0031] The following description of at least one exemplary embodiment is merely illustrative in nature and is in no way intended to limit the invention, its application, or uses.

[0032] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0033] It should be noted that like reference numerals and letters refer to similar items in the following figures, and therefore, once an item is defined in one figure, it need not be further discussed in subsequent figures.

[0034] Figure 1 This is a schematic diagram of the structure of the remote calibration system of the quantum current transformer provided in the embodiment of the present application, refer to Figure 1 As shown, the remote calibration system of the quantum current transformer includes: a laboratory standard frequency source, a satellite and a quantum current transformer, wherein

[0035] The quantum current transformer is used to measure the physical quantity to be measured in the field to be measured;

[0036] The laboratory standard frequency source is used to convert the standard current source into a standard frequency source and send it to the satellite;

[0037] The satellite is connected to the quantum current transformer for sending the standard frequency source and the satellite local crystal oscillator frequency to the quantum current transformer.

[0038] Specifically, in order to achieve the stable operation of massive power measurement sensors during the construction of new power systems and to solve the problem that many on-site measurement sensors need to be calibrated regularly, but a large number of measurement devices do not have the conditions for calibration after being connected to the network, a remote calibration technology for on-site quantum sensor equipment is proposed.

[0039] In view of the technical problems existing in the prior art, the present invention proposes a remote calibration technology for electric power field quantum sensing equipment.

[0040] To achieve the above object, the present invention provides the following technical solutions:

[0041] The invention discloses a remote calibration technology for electric power on-site quantum sensing equipment based on quantum sensing principle and satellite remote timing, which specifically comprises three parts: a laboratory standard frequency system, a satellite timing system and an on-site electric power quantum sensing device.

[0042] In this scheme, the on-site power quantum sensing equipment utilizes the quantum properties of diamond NV color centers to convert the physical quantities to be measured in the power system, including electric field, magnetic field, current, voltage, etc., into energy level differences between microscopic electrons in different spin states, and then characterizes the microscopic energy level differences through microwave frequencies, thereby realizing the conversion of the actual physical quantities to be measured into microwave frequencies. That is, utilizing the unique quantum properties of diamond NV color centers, the actual physical quantities can be characterized by measuring microwave frequencies. Therefore, utilizing this feature, for on-site power quantum measurement sensing devices, the physical quantity measurement can be calibrated by calibrating the frequency.

[0043] When the power field quantum sensing equipment measures power parameters, as the operating time increases and it is constantly disturbed by the actual application site environmental factors, measurement deviations will inevitably occur. These deviations mainly come from four aspects: errors in the microwave system, errors in the laser system, errors caused by the transmission optical path, and errors caused by the data processing system.

[0044] Among them, the error of the microwave system is the main source of error. The microwave source can emit microwaves in the frequency band of 2.5-3GHz, which are radiated to the NV color center of diamond through the microwave antenna. The energy level difference between free electrons in different spin states is measured by measuring the frequency difference between different characteristic peaks. If the emission frequency of the microwave source is offset, it will cause the final characteristic peak spectrum line to shift left and right, thus affecting the final measurement.

[0045] The laser system will also cause errors to the on-site measurement equipment. The laser system mainly includes a 532nm laser source, whose output power should theoretically be a constant, generally between 0.1mW and 10mW. The specific value can be adjusted according to different band measurements. However, with the heating of the laser source, the vibration of the on-site operating equipment, temperature rise and other factors, the power and frequency of the laser output of the laser source will be disturbed, which will eventually affect the signal-to-noise ratio at the characteristic frequency, thereby causing errors in data processing.

[0046] The transmission optical path is responsible for collecting the red fluorescence emitted by the diamond NV color center and the 532nm green laser of the transmission laser system. In the process of transmitting these optical signals, it is inevitable that transmission loss will occur due to interference from the on-site application environment, which will ultimately reduce the amount of red fluorescence signals transmitted to the data processing system, thereby reducing the sensitivity of the overall system measurement and ultimately causing measurement errors.

[0047] The data processing system is mainly used in the measurement system to receive red fluorescence signals and convert the light signals into voltage signals. By filtering the voltage signals, the final characteristic peak spectrum is obtained, thereby realizing the measurement of physical quantities. The principle of causing errors is similar to that of the transmission optical path. It will be interfered by the on-site application environment and cause noise in the final characteristic peak spectrum, thereby reducing the sensitivity of the measurement system.

[0048] In order to calibrate the errors of the field measurement equipment, two standard frequency sources need to be transmitted to the field measurement equipment. The first set of these two sets of frequency sources comes from the laboratory standard frequency source, and the second set comes from the satellite local crystal oscillator frequency.

[0049] The first set of frequency sources is used to calibrate the errors caused by the microwave system, transmission optical path system and data processing system. It is sent to the satellite by the laboratory standard frequency source and then transmitted to the on-site power quantum measurement equipment via the satellite.

[0050] The second set of frequency sources is directly derived from the satellite's local crystal oscillator frequency and is directly transmitted to the microwave system of the on-site power quantum measurement equipment to calibrate the frequency deviation of the microwave system.

[0051] The main function of the laboratory standard frequency source is to convert the standard current source into a standard frequency source and transmit it to the satellite. It mainly includes a laboratory laser system, a diamond NV color center, a laboratory microwave system, a fluorescence signal, a data processing unit and a standard current source. The standard current source generates a standard current, thereby stimulating a magnetic field in space. The diamond NV color center senses the magnetic field in space and emits a red fluorescence signal under the joint action of the laboratory laser system and the laboratory microwave system. The red fluorescence signal is transmitted to the data processing unit, and the standard frequency is finally output through photoelectric signal conversion.

[0052] Reference Figure 1 , a remote calibration technology solution for power field quantum sensing equipment, which includes three parts: laboratory standard frequency source, satellite and quantum current transformer,

[0053] In this scheme, the power on-site quantum sensing equipment utilizes the quantum properties of diamond NV color centers to convert the physical quantities to be measured in the power system, including electric field, magnetic field, current, voltage, etc., into energy level differences between microscopic electrons in different spin states, and then characterizes the microscopic energy level differences through microwave frequencies, thereby realizing the conversion of the physical quantities to be measured in reality into microwave frequencies. That is, utilizing the unique quantum properties of diamond NV color centers, the characterization of real physical quantities can be achieved by measuring microwave frequencies; therefore, utilizing this feature, for quantum current transformers, the calibration of physical quantity measurements can be achieved by calibrating the frequency.

[0054] Reference Figure 2 , Figure 1 The main function of the laboratory standard frequency source is to convert the standard current source into a standard frequency source and transmit it to the satellite. It mainly includes a laboratory laser system, a diamond NV color center, a microwave system, a fluorescence signal, a data processing unit and a standard current source. The standard current source generates a standard current, thereby stimulating a magnetic field in space. The diamond NV color center senses the magnetic field in space and emits a red fluorescence signal under the joint action of the laboratory laser system and the laboratory microwave system. The red fluorescence signal is transmitted to the data processing unit, and the standard frequency is finally output through photoelectric signal conversion.

[0055] Therefore, the present invention is based on the quantum sensing principle and satellite remote timing remote calibration technology of electric power field quantum sensing equipment, including a laboratory standard frequency source, a satellite system and an electric power field quantum measurement sensor device, relying on the quantum properties of the diamond NV color center, the physical quantity to be measured is converted into a frequency quantity, the error of the frequency quantity comes from four parts, namely the microwave system, the laser system, the transmission optical path system and the data processing system, wherein the satellite can transmit the standard frequency to the microwave system of the electric power field quantum measurement sensor device through a local crystal oscillator, so as to calibrate the frequency of the microwave source, and the laboratory standard frequency source generates a set of standard frequencies through a set of standard current sources, and transmits them to the electric power field quantum measurement sensor device through a satellite, the standard frequency can eliminate the errors caused by the laser system, the transmission optical path system and the data processing system, the above remote calibration technology can realize the remote online calibration of massive power sensor devices, greatly improving the safe and stable operation of the power system.

[0056] The above description has been given for the purpose of illustration and description. In addition, this description is not intended to limit the embodiments of the present invention to the forms disclosed herein. Although a number of example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions and sub-combinations thereof.

Claims

1. A remote calibration system for a quantum current transformer, characterized in that: include: Laboratory standard frequency source, satellite and quantum current transformer, including The quantum current transformer is used to measure the physical quantity to be measured of the field to be measured; The laboratory standard frequency source is used to convert a standard current source into a standard frequency source and send the standard frequency source to the satellite; The satellite is connected to the quantum current transformer and is used to send the standard frequency source and the satellite local crystal oscillator frequency to the quantum current transformer.

2. The remote calibration system of quantum current transformer according to claim 1, characterized in that: The quantum current transformer includes: a laser system, a diamond NV color center, a microwave system, a fluorescent signal and a data processing unit, wherein The microwave source is used to emit microwaves in the frequency band of 2.5-3 GHz, and radiate them to the diamond NV color center through a microwave antenna; The laser system is used to generate a 532nm laser source to emit to the diamond NV color center; The diamond NV color center senses the magnetic field excited by the standard frequency source and generates a red fluorescence signal under the action of the microwave and the laser source; The data processing unit converts the fluorescent signal into a photoelectric signal, converts it into a microwave frequency, and outputs a physical quantity to be measured according to the microwave frequency.

3. The remote calibration system of quantum current transformer according to claim 2, characterized in that: The output power of the laser source is between 0.1 mW and 10 mW.

4. The remote calibration system of quantum current transformer according to claim 2, characterized in that: The red fluorescent signal is transmitted to the data processing unit through the transmission optical path.

5. The remote calibration system of quantum current transformer according to claim 2, characterized in that: The standard frequency source is used to calibrate the errors caused by the microwave system, the laser system, the transmission optical path and the data processing system.

6. The remote calibration system of quantum current transformer according to claim 2, characterized in that: The satellite local crystal oscillator frequency is used to calibrate the frequency error of the microwave system.

7. The remote calibration system of quantum current transformer according to claim 2, characterized in that: The physical quantities to be measured include electric field, magnetic field, current and voltage.

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