Remote calibration system and method for quantum current transformer

Abstract

The present application discloses a remote calibration system and method for a quantum current transformer. The remote calibration system for a quantum current transformer comprises a laboratory standard frequency source, a satellite, and a quantum current transformer; the quantum current transformer is used for measuring a physical quantity to be measured of a field to be measured; the laboratory standard frequency source is used for converting a standard current source into a standard frequency source and transmitting the standard frequency source to the satellite; the satellite communicates with the quantum current transformer, and is used for transmitting the standard frequency source and a satellite local crystal oscillator frequency to the quantum current transformer.

Description

A remote calibration system and method for quantum current transformers

[0001] Cross-references to related applications

[0002] This application is based on and claims priority to Chinese Patent Application No. 202411647656.2, filed on November 18, 2024, entitled “A Remote Calibration System for a Quantum Current Transformer”, the entire contents of which are incorporated herein by reference. Technical Field

[0003] This application relates to the field of power sensing equipment calibration technology, and more specifically, to a remote calibration system and method for quantum current transformers. Background Technology

[0004] Accurate current, voltage, and energy information is of great significance in the field of power systems. With the development of new power systems, on the one hand, the large-scale grid connection of new energy power generation and the continuous increase of nonlinear electrical equipment are giving rise to the characteristics of new power systems, such as wide dynamic range, fast time-varying, and strong randomness. The problems of grid observability, measurability, and equipment status monitoring are becoming increasingly serious. The demand for multi-parameter measurement of electric field, magnetic field, and temperature is further increasing for wide-area measurement, line loss monitoring, and equipment fault early warning. On the other hand, the measurement results of massive measurement devices are deviated due to various irreversible factors such as device aging and wear.

[0005] With the construction of new power systems, many field measurement and sensing devices need to be calibrated regularly, but many of these devices do not have the conditions for calibration after being connected to the grid. Summary of the Invention

[0006] To address the shortcomings of existing technologies, this application provides a remote calibration system and method for quantum current transformers.

[0007] According to one aspect of this application, 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...

[0008] Quantum current transformers are used to measure the physical quantities to be measured in the field under test.

[0009] The laboratory standard frequency source is used to convert a standard current source into a standard frequency source and transmit it to a satellite;

[0010] The satellite communicates with the quantum current transformer to send a standard frequency source and the satellite's local crystal oscillator frequency to the quantum current transformer.

[0011] Optionally, the quantum current transformer includes: a laser system, a diamond NV color center, a microwave system, a fluorescence signal, and a data processing unit, wherein...

[0012] The microwave source is used to emit microwaves in the 2.5-3 GHz frequency band and radiate them to the diamond NV color center through a microwave antenna;

[0013] The laser system is used to generate a 532nm laser source that is emitted onto the diamond NV color center;

[0014] Diamond NV color centers sense the magnetic field excited by a standard frequency source and generate red fluorescent signals under the action of microwave and laser sources;

[0015] The data processing unit converts the fluorescent signal into a photoelectric signal, which is then converted into a microwave frequency, and outputs the physical quantity to be measured based on the microwave frequency.

[0016] Optionally, the output power of the laser source is between 0.1mW and 10mW.

[0017] Optionally, the red fluorescence signal is transmitted to the data processing unit via a transmission optical path.

[0018] Optionally, a standard frequency source is used to calibrate errors caused by microwave systems, laser systems, transmission optical paths, and data processing systems.

[0019] Optionally, the satellite's local crystal oscillator frequency is used to calibrate the frequency error of the microwave system.

[0020] Optionally, the physical quantities to be measured include electric field, magnetic field, current, and voltage.

[0021] Therefore, this application presents a remote calibration technology for power field quantum sensing devices based on quantum sensing principles and satellite remote time synchronization. It includes a laboratory standard frequency source, a satellite system, and a power field quantum measurement sensing device. Utilizing the quantum properties of the diamond NV color center, the physical quantity to be measured is converted into a frequency quantity. The error in this frequency quantity originates from four main parts: the microwave system, the laser system, the transmission optical path system, and the data processing system. The satellite can transmit a standard frequency to the microwave system of the power field quantum measurement sensing device via a local crystal oscillator, thereby calibrating the microwave source frequency. The laboratory standard frequency source generates a set of standard frequencies through a set of standard current sources, which are transmitted to the power field quantum measurement sensing device via satellite. This standard frequency can eliminate errors caused by the laser system, the transmission optical path system, and the data processing system. This remote calibration technology enables remote online calibration of a large number of power sensing devices, greatly improving the safe and stable operation of the power system. Attached Figure Description

[0022] The exemplary embodiments of this application can be more fully understood by referring to the following figures:

[0023] Figure 1 is a schematic diagram of the structure of a remote calibration system for a quantum current transformer provided in an exemplary embodiment of this application;

[0024] Figure 2 is a schematic diagram of the principle of a laboratory standard frequency source provided in an exemplary embodiment of this application. Detailed Implementation

[0025] Hereinafter, exemplary embodiments according to this application will be described in detail with reference to the accompanying drawings. Obviously, the described embodiments are merely some embodiments of this application, and not all embodiments of this application. It should be understood that this application is not limited to the exemplary embodiments described herein.

[0026] It should be noted that, unless otherwise specifically stated, the relative arrangement, numerical expressions, and values ​​of the components and steps described in these embodiments do not limit the scope of this application.

[0027] Those skilled in the art will understand that the terms "first," "second," etc., in the embodiments of this application are only used to distinguish different steps, devices, or modules, and do not represent any specific technical meaning, nor do they indicate a necessary logical order between them.

[0028] It should also be understood that in the embodiments of this application, "multiple" can refer to two or more, and "at least one" can refer to one, two or more.

[0029] It should also be understood that any component, data or structure mentioned in the embodiments of this application can generally be understood as one or more unless explicitly defined or given contrary guidance in the context.

[0030] Furthermore, the term "and / or" in this application is merely a description of the relationship between related objects, indicating that three relationships can exist. For example, A and / or B can represent: A existing alone, A and B existing simultaneously, or B existing alone. Additionally, the character " / " in this application generally indicates that the preceding and following related objects have an "or" relationship.

[0031] It should also be understood that the description of the various embodiments in this application emphasizes the differences between the various embodiments, and the similarities or similarities can be referred to each other. For the sake of brevity, they will not be described in detail.

[0032] At the same time, it should be understood that, for ease of description, the dimensions of the various parts shown in the accompanying drawings are not drawn according to actual scale.

[0033] The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the scope of this application and its application or use.

[0034] Techniques, methods, and equipment known to those skilled in the art may not be discussed in detail, but where appropriate, they should be considered part of the specification.

[0035] It should be noted that similar labels and letters in the following figures indicate similar items; therefore, once an item is defined in one figure, it does not need to be discussed further in subsequent figures.

[0036] Figure 1 is a schematic diagram of the structure of the remote calibration system for a quantum current transformer provided in an embodiment of this application. Referring to Figure 1, the remote calibration system for a quantum current transformer includes: a laboratory standard frequency source, a satellite, and a quantum current transformer.

[0037] Quantum current transformers are used to measure the physical quantities to be measured in the field under test.

[0038] The laboratory standard frequency source is used to convert a standard current source into a standard frequency source and transmit it to a satellite;

[0039] The satellite communicates with the quantum current transformer to send a standard frequency source and the satellite's local crystal oscillator frequency to the quantum current transformer.

[0040] Specifically, in order to achieve stable operation of massive power measurement sensors during the construction of new power systems and to solve the problem that many field measurement sensors need to be calibrated regularly, but many measurement devices do not have calibration conditions after being connected to the grid, a remote calibration technology for power field quantum sensing equipment is proposed.

[0041] This application addresses the technical problems existing in the prior art by proposing a remote calibration technology for power field quantum sensing devices.

[0042] To achieve the above objectives, this application provides the following technical solution:

[0043] This application discloses a remote calibration technology for power field quantum sensing devices based on quantum sensing principles and satellite remote time synchronization, specifically comprising three main parts: a laboratory standard frequency system, a satellite time synchronization system, and a field power quantum sensing device.

[0044] In this scheme, the power field quantum sensing device utilizes the quantum properties of the diamond NV (Nitrogen-Vacancy) color center to convert the physical quantities to be measured in the power system, including electric field, magnetic field, current, and voltage, into energy level differences between microscopic electrons with different spin states. These microscopic energy level differences are then characterized by microwave frequency, thereby realizing the conversion of real-world physical quantities into microwave frequencies. In other words, by utilizing the unique quantum properties of the diamond NV color center, real-world physical quantities can be characterized by measuring microwave frequencies. Therefore, using this feature, the measurement of physical quantities can be calibrated by calibrating the frequency of the field power quantum measurement sensing device.

[0045] When measuring electrical parameters, the quantum sensing equipment in the power field will inevitably experience measurement deviations as the operating time increases and it is constantly affected by environmental factors in the actual application site. These deviations mainly come from four aspects: errors in the microwave system, errors in the laser system, errors in the transmission optical path, and errors in the data processing system.

[0046] Among them, the error of the microwave system is the main source of error. The microwave source can emit microwaves in the 2.5-3 GHz band, which are radiated to the diamond NV color center 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 shifted, it will cause the final characteristic peak spectral line to shift to the left and right, thus affecting the final measurement.

[0047] Laser systems can also introduce errors into on-site measurement equipment. The laser system mainly includes a 532nm laser source, whose output power should theoretically be a constant value, generally between 0.1mW and 10mW. The specific value can be adjusted according to different measurement bands. However, factors such as laser source heating, vibration of on-site operating equipment, and temperature rise can cause disturbances to the output power and frequency of the laser source, which will ultimately affect the signal-to-noise ratio at the characteristic frequency, thus causing errors in data processing.

[0048] The transmission optical path is responsible for collecting the red fluorescence emitted by the diamond NV color center and transmitting the 532nm green laser from the laser system. During the transmission of these optical signals, transmission loss is inevitable due to interference from the field application environment, which ultimately reduces the amount of red fluorescence signal transmitted to the data processing system, thereby reducing the overall system measurement sensitivity and ultimately leading to measurement errors.

[0049] In the measurement system, the data processing system is mainly used to receive red fluorescence signals and convert them 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 error caused by the system is similar to that of the transmission optical path. It can be affected by the interference of the field application environment, which will cause noise in the final characteristic peak spectrum, thereby reducing the sensitivity of the measurement system.

[0050] 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 frequency sources comes from the laboratory standard frequency source, and the second set comes from the local crystal oscillator frequency of the satellite.

[0051] The first set of frequency sources is used to calibrate errors caused by the microwave system, transmission optical path system, and data processing system. It is sent from the laboratory standard frequency source to the satellite, and then transmitted to the on-site power quantum measurement equipment via the satellite.

[0052] The second set of frequency sources comes directly 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.

[0053] The primary function of the laboratory standard frequency source is to convert a standard current source into a standard frequency source and transmit it to the satellite. It mainly comprises a laboratory laser system, a diamond NV color center, a laboratory microwave system, a fluorescence signal processing unit, a data processing unit, and the standard current source. The standard current source generates a standard current, which in turn induces a magnetic field in space. The diamond NV color center senses this magnetic field and, under the combined action of the laboratory laser and microwave systems, emits a red fluorescence signal. This red fluorescence signal is transmitted to the data processing unit, where it is converted into a photoelectric signal and ultimately output as a standard frequency.

[0054] Referring to Figure 1, a remote calibration technology scheme for field quantum sensing devices in power systems includes three main parts: a laboratory standard frequency source, a satellite, and a quantum current transformer.

[0055] In this scheme, the power field quantum sensing device utilizes the quantum properties of diamond NV centers to convert the physical quantities to be measured in the power system, including electric fields, magnetic fields, currents, and voltages, into energy level differences between microscopic electrons with different spin states. These microscopic energy level differences are then characterized by microwave frequencies, thereby converting the physical quantities to be measured in reality into microwave frequencies. In other words, by utilizing the unique quantum properties of diamond NV centers, the physical quantities in reality can be characterized by measuring microwave frequencies. Therefore, using this feature, for quantum current transformers, the measurement of physical quantities can be calibrated by calibrating the frequency.

[0056] Referring to Figure 2, the main function of the laboratory standard frequency source in Figure 1 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 generator, a data processing unit, and a standard current source. The standard current source generates a standard current, thereby exciting a magnetic field in space. The diamond NV color center senses this magnetic field and, under the combined action of the laboratory laser system and the laboratory microwave system, emits a red fluorescence signal. This red fluorescence signal is transmitted to the data processing unit, where it is converted into a photoelectric signal and ultimately outputs the standard frequency.

[0057] Therefore, this application presents a remote calibration technology for power field quantum sensing devices based on quantum sensing principles and satellite remote time synchronization. It includes a laboratory standard frequency source, a satellite system, and a power field quantum measurement sensing device. Utilizing the quantum properties of the diamond NV color center, the physical quantity to be measured is converted into a frequency quantity. The error in this frequency quantity originates from four main parts: the microwave system, the laser system, the transmission optical path system, and the data processing system. The satellite can transmit a standard frequency to the microwave system of the power field quantum measurement sensing device via a local crystal oscillator, thereby calibrating the microwave source frequency. The laboratory standard frequency source generates a set of standard frequencies through a set of standard current sources, which are transmitted to the power field quantum measurement sensing device via satellite. This standard frequency can eliminate errors caused by the laser system, the transmission optical path system, and the data processing system. This remote calibration technology enables remote online calibration of a large number of power sensing devices, greatly improving the safe and stable operation of the power system.

[0058] The above description has been given for purposes of illustration and description. Furthermore, this description is not intended to limit the embodiments of this application to the forms disclosed herein. Although numerous exemplary aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, alterations, additions, and sub-combinations thereof. Industrial applicability

[0059] This application discloses a remote calibration system and method for a quantum current transformer, comprising: a laboratory standard frequency source, a satellite, and a quantum current transformer, wherein the quantum current transformer is used to measure the physical quantity to be measured in the field to be measured; the laboratory standard frequency source is used to convert the standard current source into a standard frequency source and transmit it to the satellite; the satellite communicates with the quantum current transformer to transmit the standard frequency source and the satellite's local crystal oscillator frequency to the quantum current transformer. Therefore, this application presents a remote calibration technology for power field quantum sensing devices based on quantum sensing principles and satellite remote time synchronization. It includes a laboratory standard frequency source, a satellite system, and a power field quantum measurement sensing device. Utilizing the quantum properties of the diamond NV color center, it converts the measured physical quantity into a frequency quantity. The error in this frequency quantity originates from four main components: the microwave system, the laser system, the transmission optical path system, and the data processing system. The satellite can transmit a standard frequency to the microwave system of the power field quantum measurement sensing device via a local crystal oscillator, thereby calibrating the microwave source frequency. The laboratory standard frequency source generates a set of standard frequencies through a set of standard current sources, which are transmitted to the power field quantum measurement sensing device via satellite. These standard frequencies can eliminate errors caused by the laser system, the transmission optical path system, and the data processing system. This remote calibration technology enables remote online calibration of a large number of power sensing devices, greatly improving the safe and stable operation of the power system.

Claims

1. A remote calibration system for a quantum current transformer, comprising: Laboratory standard frequency source, satellite, and quantum current transformer, among which, The quantum current transformer is used to measure the physical quantity to be measured in the field under test; The laboratory standard frequency source is used to convert the standard current source into a standard frequency source and transmit it to the satellite; The satellite communicates with the quantum current transformer to send the standard frequency source and the satellite's local crystal oscillator frequency to the quantum current transformer.

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

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

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

5. The remote calibration system of a quantum current transformer according to claim 2, wherein, 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 a quantum current transformer according to claim 2, wherein, The satellite's local crystal oscillator frequency is used to calibrate the frequency error of the microwave system.

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

8. A remote calibration method of a quantum current transformer, applied to a remote calibration system of a quantum current transformer, the remote calibration system of the quantum current transformer comprising: The system includes a laboratory standard frequency source, a satellite, and a quantum current transformer, wherein the satellite and the quantum current transformer communicate with each other. The quantum current transformer measures the physical quantity to be measured in the field under test; The laboratory standard frequency source converts the standard current source into a standard frequency source and transmits it to the satellite; The satellite transmits the standard frequency source and the satellite's local crystal oscillator frequency to the quantum current transformer.

9. The remote calibration method of a quantum current transformer according to claim 8, wherein, The quantum current transformer includes: a laser system, a diamond NV color center, a microwave system, a fluorescence signal, and a data processing unit, wherein... The microwave source emits microwaves in the 2.5-3 GHz frequency band and radiates them onto the diamond NV color center through a microwave antenna; The laser system is used to generate a 532nm laser source that is emitted onto the diamond NV color center; The diamond NV color center senses the magnetic field excited by the standard frequency source and generates a red fluorescent signal under the action of the microwave and the laser source; The data processing unit converts the fluorescent signal into a photoelectric signal, which is then converted into a microwave frequency, and outputs the physical quantity to be measured based on the microwave frequency.

10. The remote calibration method of a quantum current transformer according to claim 9, wherein, The output power of the laser source is between 0.1mW and 10mW.

11. The remote calibration method of a quantum current transformer according to claim 9, wherein, The red fluorescent signal is transmitted to the data processing unit through the transmission optical path.

12. The remote calibration method of a quantum current transformer according to claim 9, wherein, The standard frequency source calibrates the errors caused by the microwave system, the laser system, the transmission optical path, and the data processing system.

13. The remote calibration method of a quantum current transformer according to claim 9, wherein, The satellite's local crystal oscillator frequency is used to calibrate the frequency error of the microwave system.

14. The remote calibration method of a quantum current transformer according to claim 9, wherein, The physical quantities to be measured include electric field, magnetic field, current, and voltage.

15. A computer readable storage medium having stored thereon a computer program for performing any of the methods of claims 8-14.

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