CN117250448A - Quantum sensing-based transformer partial discharge detection method, device and system - Google Patents
Quantum sensing-based transformer partial discharge detection method, device and system Download PDFInfo
- Publication number
- CN117250448A CN117250448A CN202311207211.8A CN202311207211A CN117250448A CN 117250448 A CN117250448 A CN 117250448A CN 202311207211 A CN202311207211 A CN 202311207211A CN 117250448 A CN117250448 A CN 117250448A
- Authority
- CN
- China
- Prior art keywords
- modulated
- signal
- microwave
- transformer
- color center
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 142
- 230000036961 partial effect Effects 0.000 title claims abstract description 81
- 229910003460 diamond Inorganic materials 0.000 claims abstract description 113
- 239000010432 diamond Substances 0.000 claims abstract description 113
- 230000005684 electric field Effects 0.000 claims abstract description 109
- 230000008859 change Effects 0.000 claims abstract description 82
- 238000001228 spectrum Methods 0.000 claims abstract description 74
- 238000000034 method Methods 0.000 claims abstract description 50
- 238000004590 computer program Methods 0.000 claims abstract description 26
- 230000003287 optical effect Effects 0.000 claims abstract description 19
- 238000003860 storage Methods 0.000 claims abstract description 12
- 239000013307 optical fiber Substances 0.000 claims description 19
- 238000004891 communication Methods 0.000 claims description 15
- 238000004364 calculation method Methods 0.000 claims description 10
- 230000035945 sensitivity Effects 0.000 abstract description 3
- 239000000126 substance Substances 0.000 description 14
- 230000005284 excitation Effects 0.000 description 9
- 238000005259 measurement Methods 0.000 description 8
- 238000010586 diagram Methods 0.000 description 5
- 238000012544 monitoring process Methods 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 4
- 230000007704 transition Effects 0.000 description 4
- 230000005699 Stark effect Effects 0.000 description 3
- 238000004458 analytical method Methods 0.000 description 3
- 230000005540 biological transmission Effects 0.000 description 3
- 238000009826 distribution Methods 0.000 description 3
- 230000005283 ground state Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000010894 electron beam technology Methods 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000001857 fluorescence decay curve Methods 0.000 description 2
- 238000001506 fluorescence spectroscopy Methods 0.000 description 2
- 238000002189 fluorescence spectrum Methods 0.000 description 2
- 238000009413 insulation Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 238000006862 quantum yield reaction Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 230000003068 static effect Effects 0.000 description 2
- 230000036962 time dependent Effects 0.000 description 2
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 1
- 238000003723 Smelting Methods 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005229 chemical vapour deposition Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
- 230000005674 electromagnetic induction Effects 0.000 description 1
- 229910021389 graphene Inorganic materials 0.000 description 1
- 239000012535 impurity Substances 0.000 description 1
- 238000005468 ion implantation Methods 0.000 description 1
- 230000007774 longterm Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 229910052757 nitrogen Inorganic materials 0.000 description 1
- 125000004433 nitrogen atom Chemical group N* 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 238000010561 standard procedure Methods 0.000 description 1
- 230000001131 transforming effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1218—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing using optical methods; using charged particle, e.g. electron, beams or X-rays
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/62—Testing of transformers
Abstract
The embodiment of the application provides a method, a device, a system host device, a storage medium and a computer program product for detecting partial discharge of a transformer based on quantum sensing. The method comprises the following steps: under the condition that the target transformer does not operate, acquiring a fitting curve corresponding to the optical detection magnetic resonance spectrum of the diamond color center quantum sensor in a plurality of acquisition periods; acquiring the modulated fluorescence intensity of a fluorescence signal of the diamond color center quantum sensor in each acquisition period; based on the modulated fluorescence intensity of each acquisition period, acquiring the microwave frequency corresponding to the trough of the optical detection magnetic resonance spectrum of the fitting curve in each acquisition period; acquiring the electric field intensity change rate of the target transformer in a plurality of acquisition periods according to the microwave frequency corresponding to the trough of the optical detection magnetic resonance spectrum in the plurality of acquisition periods; and under the condition that the change rate of the electric field intensity is larger than a preset change threshold value, determining that the target transformer has partial discharge. In this method, the sensitivity of partial discharge detection can be improved.
Description
Technical Field
The present disclosure relates to the field of power detection technology, and in particular, to a method, an apparatus, a system, a detection system host device, a storage medium, and a computer program product for detecting partial discharge of a transformer based on quantum sensing.
Background
Transformers (e.g., target transformers) are one of the most important devices in an electrical power system, and stable operation thereof is critical to power transmission and ensuring normal development of production life. And because the existence of cracks and electrode burrs in the transformer manufacturing process and bubbles, impurities and the like in transformer oil in long-term operation often lead to the reduction of the insulating property of the transformer, serious insulation failure can lead to the damage of the transformer and large-area power failure, and huge economic loss is caused.
Partial discharge detection is a standard method for evaluating the insulation performance of a transformer, and the prior art mainly adopts a voltage mutual inductance method, a current mutual inductance method, a high-voltage sleeve method and an ultrasonic method for measurement, and the problems of low sensitivity and poor anti-interference capability are commonly existed in the methods.
Disclosure of Invention
In view of the foregoing, it is desirable to provide a method, apparatus, system, detection system host device, storage medium, and computer program product for detecting partial discharge of a transformer based on quantum sensing.
In a first aspect, the present application provides a method for detecting partial discharge of a transformer based on quantum sensing. The method comprises the following steps:
under the condition that a target transformer does not operate, acquiring a fitting curve corresponding to a light detection magnetic resonance spectrum of a diamond color center quantum sensor in the target transformer in a plurality of acquisition periods;
acquiring the modulated fluorescence intensity of the fluorescence signal of the diamond color center quantum sensor in each acquisition period;
acquiring microwave frequencies corresponding to light detection magnetic resonance spectrum trough of the fitting curve in each acquisition period based on the modulated fluorescence intensity of each acquisition period by using the fitting curve;
acquiring the change rate of the electric field intensity of the target transformer in the acquisition periods according to the microwave frequency corresponding to the light detection magnetic resonance spectrum trough of the acquisition periods;
and under the condition that the change rate of the electric field intensity is larger than a preset change threshold value, determining that the target transformer has partial discharge.
In one embodiment, the acquiring the modulated fluorescence intensity of the fluorescence signal of the diamond color center quantum sensor in each acquisition period includes: transmitting laser signals to the diamond color center quantum sensor in each acquisition period; the laser signal is used for exciting the diamond color center quantum sensor to emit a fluorescent signal aiming at the laser signal; and obtaining a modulated microwave signal aiming at the fluorescent signal, and modulating the fluorescent signal through the modulated microwave signal to obtain the modulated fluorescent intensity of the fluorescent signal.
In one embodiment, the modulated microwave signal comprises a first modulated microwave signal and a second modulated microwave signal; the modulated fluorescence intensity comprises a first modulated fluorescence intensity and a second modulated fluorescence intensity; the obtaining the modulated microwave signal for the fluorescent signal, and modulating the fluorescent signal by the modulated microwave signal, to obtain the modulated fluorescent intensity of the fluorescent signal, includes: acquiring a first modulation microwave frequency of the first modulation microwave signal and a second modulation microwave frequency of the second modulation microwave signal; modulating the fluorescent signal based on the first modulated microwave frequency to obtain the first modulated fluorescent intensity; modulating the fluorescent signal based on the second modulated microwave frequency to obtain the second modulated fluorescent intensity; the obtaining, by using the fitting curve, a microwave frequency corresponding to a trough of a photodetection magnetic resonance spectrum of the fitting curve in each acquisition period based on the modulated fluorescence intensity of each acquisition period includes: and determining a current fitting curve corresponding to the fitting curve by using the first modulation microwave frequency, the second modulation microwave frequency, the first modulation fluorescence intensity and the second modulation fluorescence intensity, and acquiring the microwave frequency corresponding to the trough of the photodetection magnetic resonance spectrum of the current fitting curve in each acquisition period.
In one embodiment, the obtaining the change rate of the electric field intensity of the target transformer in the plurality of acquisition periods according to the microwave frequencies corresponding to the light detection magnetic resonance spectrum troughs of the plurality of acquisition periods includes: acquiring microwave frequency corresponding to a zero electric field light detection magnetic resonance trough of the target transformer in an unoperated state; determining a difference value between the microwave frequency corresponding to the trough of the light detection magnetic resonance spectrum and the microwave frequency corresponding to the trough of the zero electric field light detection magnetic resonance spectrum as a microwave frequency offset; acquiring the electric field intensity of the target transformer in each acquisition period according to the microwave frequency offset; and acquiring the change rate of the electric field intensity of the target transformer in the plurality of acquisition periods according to the electric field intensity.
In a second aspect, the present application provides a quantum sensing-based partial discharge detection system for a transformer. The system comprises: a diamond color center quantum sensor and a detection system host device; the diamond color center quantum sensor is arranged on the inner surface of the oil tank of the target transformer; the diamond color center quantum sensor comprises a diamond NV color center and a microwave antenna; the diamond color center quantum sensor is connected with the target transformer through optical fiber communication; the detection system host device is arranged at a position which meets a preset safety distance outside the target transformer; the detection system host device and the target transformer are connected through optical fiber and/or cable communication; the detection system host device comprises a microwave generator, a photoelectric detector and a main control unit; the microwave generator and the target transformer are connected in communication by a cable, wherein,
The microwave generator is used for acquiring fitting curves corresponding to the optical detection magnetic resonance spectrums of the diamond color center quantum sensors in the target transformer in a plurality of acquisition periods under the condition that the target transformer does not operate;
the photoelectric detector is used for acquiring the modulated fluorescence intensity of the fluorescence signal of the diamond color center quantum sensor in each acquisition period;
the main control unit is used for acquiring the microwave frequency corresponding to the light detection magnetic resonance spectrum trough of the fitting curve in each acquisition period based on the modulated fluorescence intensity of each acquisition period by using the fitting curve;
the main control unit is used for acquiring the electric field intensity change rate of the target transformer in the acquisition periods according to the microwave frequencies corresponding to the light detection magnetic resonance spectrum trough of the acquisition periods;
the main control unit is used for determining that the target transformer has partial discharge under the condition that the change rate of the electric field intensity is larger than a preset change threshold value.
In one embodiment, the quantum sensing-based transformer partial discharge detection system further comprises a laser light source; the laser light source is arranged on the detection system host device; the laser light source and the diamond color center quantum sensor are connected through optical fiber communication; the laser light source is used for transmitting laser signals to the diamond color center quantum sensor in each acquisition period; the laser signal is used for exciting the diamond color center quantum sensor to emit a fluorescent signal aiming at the laser signal; the diamond color center quantum sensor is further used for transmitting a fluorescent signal aiming at the laser signal under the condition that the diamond color center quantum sensor receives the laser signal; the microwave generator is further configured to obtain a modulated microwave signal for the fluorescent signal, and modulate the fluorescent signal with the modulated microwave signal to obtain a modulated fluorescent intensity of the fluorescent signal.
In a third aspect, the present application provides a device for detecting partial discharge of a transformer based on quantum sensing. The device comprises:
the measuring module is used for acquiring fitting curves corresponding to the optical detection magnetic resonance spectrums of the diamond color center quantum sensors in the target transformer in a plurality of acquisition periods under the condition that the target transformer does not operate;
the acquisition module is used for acquiring the modulated fluorescence intensity of the fluorescence signal of the diamond color center quantum sensor in each acquisition period;
the first calculation module is used for acquiring the microwave frequency corresponding to the light detection magnetic resonance spectrum trough of the fitting curve in each acquisition period based on the modulated fluorescence intensity of each acquisition period by using the fitting curve;
the second calculation module is used for obtaining the change rate of the electric field intensity of the target transformer in the acquisition periods according to the microwave frequencies corresponding to the light detection magnetic resonance spectrum trough of the acquisition periods;
and the determining module is used for determining that the target transformer has partial discharge under the condition that the change rate of the electric field intensity is larger than a preset change threshold value.
In a fourth aspect, the present application also provides a detection system host device. The detection system host device comprises a memory and a processor, wherein the memory stores a computer program, and the processor realizes the following steps when executing the computer program:
Under the condition that a target transformer does not operate, acquiring a fitting curve corresponding to a light detection magnetic resonance spectrum of a diamond color center quantum sensor in the target transformer in a plurality of acquisition periods;
acquiring the modulated fluorescence intensity of the fluorescence signal of the diamond color center quantum sensor in each acquisition period;
acquiring microwave frequencies corresponding to light detection magnetic resonance spectrum trough of the fitting curve in each acquisition period based on the modulated fluorescence intensity of each acquisition period by using the fitting curve;
acquiring the change rate of the electric field intensity of the target transformer in the acquisition periods according to the microwave frequency corresponding to the light detection magnetic resonance spectrum trough of the acquisition periods;
and under the condition that the change rate of the electric field intensity is larger than a preset change threshold value, determining that the target transformer has partial discharge.
In a fifth aspect, the present application also provides a computer-readable storage medium. The computer readable storage medium having stored thereon a computer program which when executed by a processor performs the steps of:
under the condition that a target transformer does not operate, acquiring a fitting curve corresponding to a light detection magnetic resonance spectrum of a diamond color center quantum sensor in the target transformer in a plurality of acquisition periods;
Acquiring the modulated fluorescence intensity of the fluorescence signal of the diamond color center quantum sensor in each acquisition period;
acquiring microwave frequencies corresponding to light detection magnetic resonance spectrum trough of the fitting curve in each acquisition period based on the modulated fluorescence intensity of each acquisition period by using the fitting curve;
acquiring the change rate of the electric field intensity of the target transformer in the acquisition periods according to the microwave frequency corresponding to the light detection magnetic resonance spectrum trough of the acquisition periods;
and under the condition that the change rate of the electric field intensity is larger than a preset change threshold value, determining that the target transformer has partial discharge.
In a sixth aspect, the present application also provides a computer program product. The computer program product comprises a computer program which, when executed by a processor, implements the steps of:
under the condition that a target transformer does not operate, acquiring a fitting curve corresponding to a light detection magnetic resonance spectrum of a diamond color center quantum sensor in the target transformer in a plurality of acquisition periods;
acquiring the modulated fluorescence intensity of the fluorescence signal of the diamond color center quantum sensor in each acquisition period;
Acquiring microwave frequencies corresponding to light detection magnetic resonance spectrum trough of the fitting curve in each acquisition period based on the modulated fluorescence intensity of each acquisition period by using the fitting curve;
acquiring the change rate of the electric field intensity of the target transformer in the acquisition periods according to the microwave frequency corresponding to the light detection magnetic resonance spectrum trough of the acquisition periods;
and under the condition that the change rate of the electric field intensity is larger than a preset change threshold value, determining that the target transformer has partial discharge.
In the method, the device, the system, the detection system host device, the storage medium and the computer program product for detecting the partial discharge of the transformer based on quantum sensing, the partial discharge detection of the target transformer can be realized based on the partial discharge detection system of the transformer based on quantum sensing. The method comprises the steps that under the condition that a target transformer does not run, a microwave generator based on the quantum sensing-based transformer partial discharge detection system can acquire fitting curves corresponding to optical detection magnetic resonance spectrums of diamond color center quantum sensors in the target transformer in a plurality of acquisition periods, and the fitting curves are sent to a main control unit of the quantum sensing-based transformer partial discharge detection system through cables; next, the method can acquire the modulated fluorescence intensity of the fluorescence signal of the diamond color center quantum sensor in each acquisition period based on the photoelectric detector of the partial discharge detection system of the transformer based on quantum sensing; the modulated fluorescence intensity is sent to a main control unit of the quantum sensing-based transformer partial discharge detection system through a cable; furthermore, the main control unit can acquire the microwave frequency corresponding to the light detection magnetic resonance spectrum trough of the fitting curve in each acquisition period based on the modulated fluorescence intensity of each acquisition period by using the fitting curve; the electric field intensity change rate of the target transformer in a plurality of acquisition periods can be obtained according to the microwave frequency corresponding to the light detection magnetic resonance spectrum trough of the plurality of acquisition periods; therefore, under the condition that the change rate of the electric field intensity is larger than the preset change threshold value, the partial discharge of the target transformer can be determined. In the method provided by the embodiment of the application, the dependence change relation between the diamond NV color center quantum level and the local electric field intensity can be utilized, in partial discharge detection of a target transformer, the change of the electric field intensity of the target transformer can be determined by detecting the change of the modulated fluorescence intensity of the diamond NV color center fluorescence signal, and then whether the target transformer has partial discharge or not is judged according to the change condition of the electric field intensity along with time.
Drawings
FIG. 1 is a block diagram of a partial discharge detection system for a transformer based on quantum sensing according to an embodiment;
fig. 2 is a schematic flow chart of a method for detecting partial discharge of a transformer based on quantum sensing according to an embodiment;
FIG. 3 is a schematic diagram of coordinates of a fitted curve provided by one embodiment;
FIG. 4 is a graph of the electric field strength versus time provided by one embodiment;
FIG. 5 is a flow chart of obtaining modulated fluorescence intensity according to one embodiment;
FIG. 6 is a block diagram of a device for detecting partial discharge of a transformer based on quantum sensing according to an embodiment;
fig. 7 is an internal structural diagram of a detection system host device according to an embodiment.
Detailed Description
In order to make the objects, technical solutions and advantages of the present application more apparent, the present application will be further described in detail with reference to the accompanying drawings and examples. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the present application.
The method for detecting the partial discharge of the transformer based on the quantum sensing can be applied to a partial discharge detection system of the transformer based on the quantum sensing shown in fig. 1. The quantum sensing-based partial discharge detection system of the transformer can comprise: a diamond color center quantum sensor and a detection system host device; the diamond color center quantum sensor is connected with the target transformer through optical fiber communication; the detection system host device is placed at a position which meets a preset safety distance outside the target transformer; the detection system host device is connected with the target transformer through optical fiber and/or cable communication; the detection system host device comprises a microwave generator, a photoelectric detector and a main control unit; the microwave generator and the target transformer are connected in communication by a cable, wherein,
Target transformer: the target transformer may be a transformer to be detected by partial discharge in the power system, i.e. a transformer to be detected; the transformer to be tested can be any one of transformers in a power system.
Diamond color center quantum sensor: the diamond color center quantum sensor can be arranged on the inner surface of an oil tank of the target transformer and/or near a winding of the target transformer; the diamond color center quantum sensor comprises a diamond NV color center and a microwave antenna; the diamond NV colour centre can be placed at the tip of an optical fibre, and the fluorescent signal emitted by the diamond NV colour centre is transmitted back to the detection system host device by means of the optical fibre.
The microwave generator can be installed in the host device of the detection system, and can be in communication connection with the microwave antenna of the diamond color center quantum sensor through a cable. Under the condition that the target transformer does not operate, a fitting curve corresponding to the optical detection magnetic resonance spectrum of the diamond color center quantum sensor in the target transformer in a plurality of acquisition periods can be obtained, and the fitting curve is transmitted to the main control unit through a cable.
The photoelectric detector can be arranged in the host device of the detection system and can be in communication connection with the diamond color center quantum sensor through optical fibers; the modulated fluorescence intensity of the fluorescence signal of the diamond color center quantum sensor at each acquisition period may be obtained, and in some possible implementations, obtaining the modulated fluorescence intensity may include: the quantum sensing-based transformer partial discharge detection system can further comprise a laser light source, wherein the laser light source is arranged on a detection system host device; the laser light source and the diamond color center quantum sensor are connected through optical fiber communication; in each acquisition period, the laser light source can emit laser signals to the diamond color center quantum sensor; the laser signal is used for exciting the diamond color center quantum sensor; the diamond color center quantum sensor can emit a fluorescent signal aiming at the laser signal under the condition that the diamond color center quantum sensor receives the laser signal, and transmits the fluorescent signal to the detection system host device through the optical fiber, in the detection system host device, the microwave generator can modulate the fluorescent signal through modulating the microwave signal, and the photoelectric detector can measure the modulated fluorescent intensity of the modulated fluorescent signal and transmit the modulated fluorescent intensity to the main control unit through a cable.
The main control unit: the main control unit can be arranged in the detection system host device, and can be in communication connection with the microwave generator and the photoelectric detector through cables. The main control unit can acquire the microwave frequency corresponding to the light detection magnetic resonance spectrum trough of the fitting curve in each acquisition period based on the modulated fluorescence intensity of each acquisition period by utilizing the fitting curve after receiving the fitting curve sent by the microwave generator and the modulated fluorescence intensity of the diamond color center quantum sensor sent by the photoelectric detector; acquiring the electric field intensity change rate of the target transformer in a plurality of acquisition periods according to the microwave frequency corresponding to the trough of the optical detection magnetic resonance spectrum in the plurality of acquisition periods; and under the condition that the change rate of the electric field intensity is larger than a preset change threshold value, determining that the target transformer has partial discharge. The greater the rate of change of the electric field strength, the more severe the partial discharge of the target transformer.
In one embodiment, as shown in fig. 2, a method for detecting partial discharge of a transformer based on quantum sensing is provided, and in this embodiment, the method includes the following steps:
step S201, under the condition that the target transformer does not operate, a fitting curve corresponding to the optical detection magnetic resonance spectrum of the diamond color center quantum sensor in the target transformer in a plurality of acquisition periods is obtained.
The target transformer can be a transformer to be detected by partial discharge in the power system, namely a transformer to be detected; the transformer to be tested can be any one of transformers in a power system. A transformer is a stationary electrical device for transforming ac voltage and current to transmit ac power. The electric energy transmission is realized according to the principle of electromagnetic induction. The use of the transformer can be divided into a power transformer, a test transformer, an instrument transformer and a transformer with special purposes: the power transformer is necessary equipment for power transmission and distribution and power distribution of power users; a device for performing a withstand voltage (boost) test on the electrical device by the test transformer; the transformer for the instrument is used for electrical measurement and relay protection (PT, CT) of a power distribution system; the transformers for special use include electric furnace transformers for smelting, electric welding transformers, rectifier transformers for electrolysis, small-sized voltage regulating transformers, etc. In the case of a target transformer operating in a state with an electric field, where multiple acquisition cycles may be provided, in one possible implementation, a diamond color center quantum sensor may be provided in the target transformer, which may be used to detect partial discharge conditions of the target transformer. The diamond NV color center quantum sensor, namely the diamond color center quantum sensor, is a quantum sensor based on a nitrogen-vacancy (NV) color center in diamond. The NV colour centre in diamond is a special defect structure consisting of one nitrogen atom and one vacancy. It has many excellent properties that make it an ideal quantum sensor. The diamond NV color center quantum sensor may be used to measure and detect a variety of physical and environmental parameters including magnetic fields, temperatures, pressures, electric fields, and the like. The working principle is that the quantum state of the NV color center is changed under the action of an external physical field, so that the physical quantity is measured. Specifically, the working process of the diamond NV color center quantum sensor is as follows: preparation: first, a diamond sample containing NV color centers needs to be prepared. This may be achieved by ion implantation or chemical vapour deposition or the like. Laser excitation: the diamond sample is excited by a laser, and the electron spin of the NV color center is excited to a high energy level. Reading: and reading the excited NV color center by a detection laser, and measuring parameters such as fluorescence intensity or fluorescence lifetime. Physical quantity measurement: the external physical field changes the quantum state of the NV color center, thereby affecting the fluorescence signal. From the measurement of the fluorescent signal, the magnitude or change of the external physical field can be deduced. The diamond NV color center quantum sensor has the advantages of high sensitivity, high resolution, wide measurement range and the like. The sensor has wide application prospect in the fields of biomedicine, material science, environmental monitoring and the like, and can be used for high-precision physical quantity measurement and sensing. In summary, the diamond color center quantum sensor may be disposed in the target transformer, and the change of the ground state zero field splitting value of the NV color center along with the electric field of the target transformer is detected by using the optical detection magnetic resonance spectrum technology by utilizing the characteristic that the diamond NV color center quantum energy spectrum changes along with the electric field of the target transformer, that is, a fitting curve corresponding to the optical detection magnetic resonance spectrum of the diamond color center quantum sensor in a plurality of acquisition periods is obtained, and then, the electric field intensity of the electric field of the target transformer may be obtained based on the fitting curve, so that whether the target transformer has partial discharge or not may be determined based on the change condition of the electric field intensity of the electric field of the target transformer, and the greater the change rate of the electric field intensity indicates that the partial discharge of the target transformer is more serious.
Step S202, obtaining the modulated fluorescence intensity of the fluorescence signal of the diamond color center quantum sensor in each acquisition period.
Firstly, in each acquisition period, a laser power supply contained in the partial discharge detection system of the transformer based on quantum sensing can emit laser signals to a diamond NV color center in the diamond color center quantum sensor through an optical fiber, the laser signals can excite electron spins of the diamond NV color center to a high energy level, in the process, the diamond NV color center can emit fluorescent signals, the diamond color center quantum sensor can send the fluorescent signals to the microwave generator through the optical fiber, the microwave generator can modulate the fluorescent signals through modulating the microwave signals to obtain modulated fluorescent signals, the modulated fluorescent signals are transmitted to the photoelectric detector through the optical fiber, and the photoelectric detector can measure the intensity of the modulated fluorescent signals to obtain the modulated fluorescent intensity of the modulated fluorescent signals. Fluorescent signal refers to visible or near infrared light emitted by a substance upon excitation. When a substance is subjected to excitation energy (e.g., light or electron beam), its internal electrons are excited to a higher energy level. These excited electrons then undergo a non-radiative transition back to the ground state, releasing energy. This energy is emitted in the form of light, i.e. a fluorescent signal is generated. The fluorescent signal has the following characteristics: fluorescence emission wavelength: the emission wavelength of the fluorescent signal is typically greater than the excitation wavelength because some of the energy is lost during the non-radiative transition. The emission wavelength of the fluorescent signal can be measured by fluorescence spectroscopy. Fluorescence intensity: the intensity of the fluorescent signal depends on the intensity of the excitation energy, the concentration of the substance, and the fluorescence quantum yield of the substance itself. The fluorescence intensity may be represented by a peak value of a fluorescence spectrum or an integrated value of the entire spectrum. Fluorescence lifetime: the lifetime of a fluorescent signal refers to the duration of fluorescent emission. The fluorescence lifetime of different substances can vary in the range of nanoseconds to microseconds. The fluorescence lifetime can be measured by a fluorescence decay curve or a fluorescence lifetime meter. Fluorescent signals have wide application in the fields of scientific research, biomedicine, environmental monitoring and the like. By measuring and analyzing the fluorescent signal, information of the substance, such as concentration, molecular structure, chemical reaction, etc., can be obtained, thereby realizing detection, analysis and monitoring of the substance.
Step S203, obtaining the microwave frequency corresponding to the trough of the photodetection magnetic resonance spectrum of the fitting curve in each acquisition period based on the modulated fluorescence intensity of each acquisition period by using the fitting curve.
Wherein, as shown in fig. 3, the fitted curve can be represented by the following formula (1):
wherein y can be the modulated fluorescence intensity of the diamond color center quantum sensor; x can be the microwave frequency corresponding to the trough of the photodetection magnetic resonance spectrum; x is x c The microwave frequency of the fitted curve at the trough position can be; a. y is 0 And ω is a parameter of the fitted curve. According to the formula (1), the microwave frequency corresponding to the trough of the photodetection magnetic resonance spectrum of the fitting curve in each acquisition period can be calculated according to the parameters of the fitting curve and the modulated fluorescence intensity of each acquisition period. The microwave frequency corresponding to the trough of the photodetection magnetic resonance spectrum can be the microwave frequency of the fitted curve at the trough position under the condition that the target transformer is in an operating state, namely has an electric field.
Step S204, obtaining the electric field intensity change rate of the target transformer in a plurality of acquisition periods according to the microwave frequencies corresponding to the light detection magnetic resonance spectrum trough of the plurality of acquisition periods.
In general, the microwave frequency offset at the trough position of each acquisition period and the electric field intensity of the electric field satisfy the stark effect, and can be represented by the following formula (2):
Wherein, E can be the electric field intensity of the target transformer in each acquisition period under the condition that the target transformer is in an operation state, namely, an electric field exists; x is x p The method can be that under the condition that the target transformer is in an operation state, namely an electric field exists, the trough position of the fitting curve corresponds to the microwave frequency of the trough of the optical detection magnetic resonance spectrum of each acquisition period; x is x c The method can be that under the condition that the target transformer is in an unoperated state, namely in a zero electric field, the zero electric field light at the trough position of the fitting curve detects the microwave frequency corresponding to the magnetic resonance trough; x is x p -x c The microwave frequency offset may be the trough position of the fitted curve; m may be a constant coefficient.
As shown in fig. 4, after the electric field intensity of the target transformer in each acquisition period is obtained, the time-dependent change condition of the electric field intensity, that is, the change rate of the electric field intensity, is used to represent the time-dependent change speed of the electric field intensity, and the larger the change rate of the electric field intensity is, the more serious the partial discharge of the target transformer is, so that it can be determined whether the partial discharge exists in the target transformer based on the magnitude of the change rate of the electric field intensity.
In step S205, in the case that the change rate of the electric field intensity is greater than the preset change threshold, it is determined that the target transformer has partial discharge.
The preset change threshold may be a preset minimum electric field strength change rate corresponding to the target transformer when partial discharge exists.
In the method of the embodiment, the partial discharge detection for the target transformer can be realized based on the quantum sensing-based transformer partial discharge detection system. The method comprises the steps that under the condition that a target transformer does not run, a microwave generator based on the quantum sensing-based transformer partial discharge detection system can acquire fitting curves corresponding to optical detection magnetic resonance spectrums of diamond color center quantum sensors in the target transformer in a plurality of acquisition periods, and the fitting curves are sent to a main control unit of the quantum sensing-based transformer partial discharge detection system through cables; then, the modulated fluorescence intensity of the fluorescence signal of the diamond color center quantum sensor in each acquisition period can be obtained based on the photoelectric detector of the partial discharge detection system of the transformer based on quantum sensing; the modulated fluorescence intensity is sent to a main control unit of the quantum sensing-based transformer partial discharge detection system through a cable; furthermore, the main control unit can acquire the microwave frequency corresponding to the light detection magnetic resonance spectrum trough of the fitting curve in each acquisition period based on the modulated fluorescence intensity of each acquisition period by using the fitting curve; the electric field intensity change rate of the target transformer in a plurality of acquisition periods can be obtained according to the microwave frequency corresponding to the light detection magnetic resonance spectrum trough of the plurality of acquisition periods; therefore, under the condition that the change rate of the electric field intensity is larger than the preset change threshold value, the partial discharge of the target transformer can be determined. In the method provided by the embodiment of the application, the dependence change relation between the diamond NV color center quantum level and the local electric field intensity can be utilized, in partial discharge detection of a target transformer, the change of the electric field intensity of the target transformer can be determined by detecting the change of the modulated fluorescence intensity of the diamond NV color center fluorescence signal, and then whether the target transformer has partial discharge or not is judged according to the change condition of the electric field intensity along with time.
In one embodiment, as shown in fig. 5, step S202 may include the following steps:
in step S501, a laser signal is emitted to the diamond color center quantum sensor in each acquisition period.
Wherein in some possible implementations, a laser power supply included in the quantum sensing-based transformer partial discharge detection system may emit a laser signal to a diamond NV color center in the diamond color center quantum sensor through an optical fiber, the laser signal being used to excite the diamond color center quantum sensor to emit a fluorescent signal for the laser signal, the laser signal may excite an electron spin of the diamond NV color center to a high energy level.
In this process, the diamond NV colour centre may emit a fluorescent signal and the diamond colour centre quantum sensor may send the fluorescent signal to the microwave generator via an optical fibre. Fluorescent signal refers to visible or near infrared light emitted by a substance upon excitation. When a substance is subjected to excitation energy (e.g., light or electron beam), its internal electrons are excited to a higher energy level. These excited electrons then undergo a non-radiative transition back to the ground state, releasing energy. This energy is emitted in the form of light, i.e. a fluorescent signal is generated. The fluorescent signal has the following characteristics: fluorescence emission wavelength: the emission wavelength of the fluorescent signal is typically greater than the excitation wavelength because some of the energy is lost during the non-radiative transition. The emission wavelength of the fluorescent signal can be measured by fluorescence spectroscopy. Fluorescence intensity: the intensity of the fluorescent signal depends on the intensity of the excitation energy, the concentration of the substance, and the fluorescence quantum yield of the substance itself. The fluorescence intensity may be represented by a peak value of a fluorescence spectrum or an integrated value of the entire spectrum. Fluorescence lifetime: the lifetime of a fluorescent signal refers to the duration of fluorescent emission. The fluorescence lifetime of different substances can vary in the range of nanoseconds to microseconds. The fluorescence lifetime can be measured by a fluorescence decay curve or a fluorescence lifetime meter. Fluorescent signals have wide application in the fields of scientific research, biomedicine, environmental monitoring and the like. By measuring and analyzing the fluorescent signal, information of the substance, such as concentration, molecular structure, chemical reaction, etc., can be obtained, thereby realizing detection, analysis and monitoring of the substance.
Step S502, a modulated microwave signal for the fluorescent signal is obtained, and the fluorescent signal is modulated by the modulated microwave signal, so as to obtain the modulated fluorescent intensity of the fluorescent signal.
The microwave generator can modulate the fluorescent signal by modulating the microwave signal to obtain a modulated fluorescent signal, and the modulated fluorescent signal is transmitted to the photoelectric detector through an optical fiber, and the photoelectric detector can measure the intensity of the modulated fluorescent signal to obtain the modulated fluorescent intensity of the modulated fluorescent signal.
In the method of the embodiment, the fluorescent signal of the diamond color center quantum sensor can be modulated based on the microwave generator, the modulated fluorescent intensity of the fluorescent signal is accurately calculated, the microwave frequency corresponding to the trough of the light detection magnetic resonance spectrum of each acquisition period can be conveniently obtained later, the change rate of the electric field intensity is further obtained, and the partial discharge of the target transformer is accurately judged.
In some embodiments, step S502 may include:
acquiring a first modulation microwave frequency of a first modulation microwave signal and a second modulation microwave frequency of a second modulation microwave signal; modulating a fluorescent signal based on the first modulated microwave frequency to obtain a first modulated fluorescent intensity; and modulating the fluorescent signal based on the second modulated microwave frequency to obtain second modulated fluorescent intensity.
Wherein the modulated microwave signal comprises a first modulated microwave signal and a second modulated microwave signal; the modulated fluorescence intensity includes a first modulated fluorescence intensity and a second modulated fluorescence intensity.
The microwave generator can modulate the fluorescent signal of the diamond color center quantum sensor based on two modulation microwave frequencies, so that two modulation fluorescent intensities can be obtained, and the fluorescent signal of the diamond color center quantum sensor is modulated through a first modulation microwave frequency, so that a first modulation fluorescent intensity can be obtained; and modulating the fluorescent signal of the diamond color center quantum sensor through the second modulation microwave frequency to obtain second modulation fluorescent intensity. In one possible implementation, the first modulated microwave frequency and the second modulated microwave frequency may be set to 2875MHz and 2885MHz, respectively, as one acquisition period, to continuously measure the fluorescence signal emitted by the quantum sensor. The measurement frequency is set to 100Hz, namely, fluorescence signals are acquired every 5ms, and two acquisitions (corresponding to 2875MHz and 2885MHz microwave frequencies respectively) are one period.
In the method of the embodiment, the fluorescent signal of the diamond color center quantum sensor can be modulated based on the microwave generator, the modulated fluorescent intensity of the fluorescent signal is accurately calculated, the microwave frequency corresponding to the trough of the light detection magnetic resonance spectrum of each acquisition period can be conveniently obtained later, the change rate of the electric field intensity is further obtained, and the partial discharge of the target transformer is accurately judged.
In some embodiments, step S204 may include:
acquiring microwave frequency corresponding to a zero electric field light detection magnetic resonance trough of a target transformer in an unoperated state; determining a difference value between the microwave frequency corresponding to the trough of the light detection magnetic resonance spectrum and the microwave frequency corresponding to the trough of the zero electric field light detection magnetic resonance spectrum as a microwave frequency offset; acquiring the electric field intensity of the target transformer in each acquisition period according to the microwave frequency offset; and acquiring the change rate of the electric field intensity of the target transformer in a plurality of acquisition periods according to the electric field intensity.
In general, the microwave frequency offset at the trough position of each acquisition period and the electric field intensity of the electric field satisfy the stark effect, and can be represented by the following formula (2):
wherein, E can be the electric field intensity of the target transformer in each acquisition period under the condition that the target transformer is in an operation state, namely, an electric field exists; x is x p The method can be that under the condition that the target transformer is in an operation state, namely an electric field exists, the trough position of the fitting curve corresponds to the microwave frequency of the trough of the optical detection magnetic resonance spectrum of each acquisition period; x is x c The method can be that under the condition that the target transformer is in an unoperated state, namely in a zero electric field, the zero electric field light at the trough position of the fitting curve detects the microwave frequency corresponding to the magnetic resonance trough; x is x p -x c The microwave frequency offset may be the trough position of the fitted curve; m may be a constant coefficient.
After the electric field intensity of the target transformer in each acquisition period is obtained, the change condition of the electric field intensity along with time, namely the change rate of the electric field intensity, is used for representing the change speed of the electric field intensity along with time, and the larger the change rate of the electric field intensity is, the more serious the partial discharge of the target transformer is, so that whether the target transformer has the partial discharge can be judged based on the change rate of the electric field intensity.
In the method of the embodiment, the electric field intensity of the target transformer in each acquisition period can be obtained based on the microwave frequency offset of the trough position of each acquisition period by utilizing the stark effect, and further, the change rate of the electric field intensity is obtained, so that the partial discharge of the target transformer can be accurately judged.
In some embodiments, acquiring the fitted curve corresponding to the photodetection magnetic resonance spectrum of the diamond color center quantum sensor in the target transformer in step S201 in a plurality of acquisition periods may include:
under the condition that the target transformer does not operate, acquiring a zero electric field fitting curve of the diamond color center quantum sensor; acquiring parameters of a fitting curve according to the zero electric field fitting curve; and obtaining a fitting curve according to the parameters of the fitting curve.
In the case that the target transformer is in an operating state, acquiring a fitting curve corresponding to the optical detection magnetic resonance spectrum of the diamond color center quantum sensor in a plurality of acquisition periods first requires acquiring parameters of the fitting curve, in one possible implementation manner, the zero electric field parameters of the diamond color center quantum sensor can be used as parameters of the fitting curve when the target transformer is in an unoperated state, i.e. in a zero electric field condition, for example, a and y in formula (1) 0 And ω, can be used as parameters of the fitted curve.
In the method of the embodiment, the zero electric field parameter of the diamond color center quantum sensor under the condition of zero electric field is used as the parameter of the fitting curve, so that the zero electric field is used as the reference to obtain the microwave frequency offset and the change condition of the electric field strength along with time, and the partial discharge of the target transformer is judged more accurately.
It should be understood that, although the steps in the flowcharts related to the embodiments described above are sequentially shown as indicated by arrows, these steps are not necessarily sequentially performed in the order indicated by the arrows. The steps are not strictly limited to the order of execution unless explicitly recited herein, and the steps may be executed in other orders. Moreover, at least some of the steps in the flowcharts described in the above embodiments may include a plurality of steps or a plurality of stages, which are not necessarily performed at the same time, but may be performed at different times, and the order of the steps or stages is not necessarily performed sequentially, but may be performed alternately or alternately with at least some of the other steps or stages.
Based on the same inventive concept, the embodiment of the application also provides a transformer partial discharge detection device based on quantum sensing, which is used for realizing the above related transformer partial discharge detection method based on quantum sensing. The implementation of the solution provided by the device is similar to the implementation described in the above method, so the specific limitation in the embodiments of the device for detecting partial discharge of a transformer based on quantum sensing provided below may be referred to the limitation of the method for detecting partial discharge of a transformer based on quantum sensing hereinabove, and will not be repeated here.
In one embodiment, as shown in fig. 6, there is provided a partial discharge detection apparatus for a transformer based on quantum sensing, including: a measurement module 601, an acquisition module 602, a first calculation module 603, a second calculation module 604, and a determination module 605, wherein:
the measuring module 601 is configured to obtain a fitted curve corresponding to a light detection magnetic resonance spectrum of a diamond color center quantum sensor in a target transformer in a plurality of acquisition periods when the target transformer is not running;
the acquisition module 602 is configured to acquire modulated fluorescence intensities of fluorescence signals of the diamond color center quantum sensor in each acquisition period;
A first calculation module 603, configured to obtain, based on the modulated fluorescence intensity of each of the acquisition periods, a microwave frequency corresponding to a trough of a photodetection magnetic resonance spectrum of the fitted curve in each of the acquisition periods, using the fitted curve;
a second calculation module 604, configured to obtain a rate of change of electric field intensity of the target transformer in the multiple acquisition periods according to microwave frequencies corresponding to troughs of the optical detection magnetic resonance spectrum of the multiple acquisition periods;
and the determining module 605 is configured to determine that partial discharge exists in the target transformer when the change rate of the electric field intensity is greater than a preset change threshold.
In addition, the acquisition module 602 is further configured to: transmitting laser signals to the diamond color center quantum sensor in each acquisition period; the laser signal is used for exciting the diamond color center quantum sensor to emit a fluorescent signal aiming at the laser signal; and obtaining a modulated microwave signal aiming at the fluorescent signal, and modulating the fluorescent signal through the modulated microwave signal to obtain the modulated fluorescent intensity of the fluorescent signal.
In one possible implementation, the modulated microwave signal comprises a first modulated microwave signal and a second modulated microwave signal; the modulated fluorescence intensity comprises a first modulated fluorescence intensity and a second modulated fluorescence intensity; the acquisition module 602 is further configured to: acquiring a first modulation microwave frequency of the first modulation microwave signal and a second modulation microwave frequency of the second modulation microwave signal; modulating the fluorescent signal based on the first modulated microwave frequency to obtain the first modulated fluorescent intensity; modulating the fluorescent signal based on the second modulated microwave frequency to obtain the second modulated fluorescent intensity; the first calculation module 603 is further configured to: and determining a current fitting curve corresponding to the fitting curve by using the first modulation microwave frequency, the second modulation microwave frequency, the first modulation fluorescence intensity and the second modulation fluorescence intensity, and acquiring the microwave frequency corresponding to the trough of the photodetection magnetic resonance spectrum of the current fitting curve in each acquisition period.
The second calculation module 604 is further configured to: acquiring microwave frequency corresponding to a zero electric field light detection magnetic resonance trough of the target transformer in an unoperated state; determining a difference value between the microwave frequency corresponding to the trough of the light detection magnetic resonance spectrum and the microwave frequency corresponding to the trough of the zero electric field light detection magnetic resonance spectrum as a microwave frequency offset; acquiring the electric field intensity of the target transformer in each acquisition period according to the microwave frequency offset; and acquiring the change rate of the electric field intensity of the target transformer in the plurality of acquisition periods according to the electric field intensity.
The above-mentioned partial discharge detection device for the transformer based on quantum sensing may be implemented in whole or in part by software, hardware and a combination thereof. The above modules may be embedded in hardware or may be independent of a processor in the detection system host device, or may be stored in software in a memory in the detection system host device, so that the processor may call and execute operations corresponding to the above modules.
In one embodiment, a detection system host device is provided, which may be a server, and the internal structure thereof may be as shown in fig. 7. The detection system host device includes a processor, a memory, and a network interface connected by a system bus. Wherein the processor of the detection system host device is configured to provide computing and control capabilities. The memory of the detection system host device includes a nonvolatile storage medium and an internal memory. The non-volatile storage medium stores an operating system, computer programs, and a database. The internal memory provides an environment for the operation of the operating system and computer programs in the non-volatile storage media. The database of the detection system host device is used for storing relevant data of the partial discharge detection of the transformer based on quantum sensing. The network interface of the detection system host device is used for communicating with an external terminal through a network connection. The computer program, when executed by a processor, implements a method for detecting partial discharge of a transformer based on quantum sensing.
It will be appreciated by those skilled in the art that the structure shown in fig. 7 is merely a block diagram of a portion of the structure associated with the present application and is not limiting of the detection system host device to which the present application is applied, and that a particular detection system host device may include more or fewer components than shown, or may combine certain components, or have a different arrangement of components.
In one embodiment, there is also provided a detection system host apparatus including a memory and a processor, the memory storing a computer program, the processor implementing the steps of the method embodiments described above when executing the computer program.
In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored which, when executed by a processor, carries out the steps of the method embodiments described above.
In an embodiment, a computer program product is provided, comprising a computer program which, when executed by a processor, implements the steps of the method embodiments described above.
It should be noted that, user information (including but not limited to user equipment information, user personal information, etc.) and data (including but not limited to data for analysis, stored data, presented data, etc.) referred to in the present application are information and data authorized by the user or sufficiently authorized by each party.
Those skilled in the art will appreciate that implementing all or part of the above described methods may be accomplished by way of a computer program stored on a non-transitory computer readable storage medium, which when executed, may comprise the steps of the embodiments of the methods described above. Any reference to memory, database, or other medium used in the various embodiments provided herein may include at least one of non-volatile and volatile memory. The nonvolatile Memory may include Read-Only Memory (ROM), magnetic tape, floppy disk, flash Memory, optical Memory, high density embedded nonvolatile Memory, resistive random access Memory (ReRAM), magnetic random access Memory (Magnetoresistive Random Access Memory, MRAM), ferroelectric Memory (Ferroelectric Random Access Memory, FRAM), phase change Memory (Phase Change Memory, PCM), graphene Memory, and the like. Volatile memory can include random access memory (Random Access Memory, RAM) or external cache memory, and the like. By way of illustration, and not limitation, RAM can be in the form of a variety of forms, such as static random access memory (Static Random Access Memory, SRAM) or dynamic random access memory (Dynamic Random Access Memory, DRAM), and the like. The databases referred to in the various embodiments provided herein may include at least one of relational databases and non-relational databases. The non-relational database may include, but is not limited to, a blockchain-based distributed database, and the like. The processors referred to in the embodiments provided herein may be general purpose processors, central processing units, graphics processors, digital signal processors, programmable logic units, quantum computing-based data processing logic units, etc., without being limited thereto.
The technical features of the above embodiments may be arbitrarily combined, and all possible combinations of the technical features in the above embodiments are not described for brevity of description, however, as long as there is no contradiction between the combinations of the technical features, they should be considered as the scope of the description.
The above examples only represent a few embodiments of the present application, which are described in more detail and are not to be construed as limiting the scope of the present application. It should be noted that it would be apparent to those skilled in the art that various modifications and improvements could be made without departing from the spirit of the present application, which would be within the scope of the present application. Accordingly, the scope of protection of the present application shall be subject to the appended claims.
Claims (10)
1. A method for detecting partial discharge of a transformer based on quantum sensing, which is applied to a detection system host device in a partial discharge detection system of a transformer based on quantum sensing, the method comprising:
under the condition that a target transformer does not operate, acquiring a fitting curve corresponding to a light detection magnetic resonance spectrum of a diamond color center quantum sensor in the target transformer in a plurality of acquisition periods;
Acquiring the modulated fluorescence intensity of the fluorescence signal of the diamond color center quantum sensor in each acquisition period;
acquiring microwave frequencies corresponding to light detection magnetic resonance spectrum trough of the fitting curve in each acquisition period based on the modulated fluorescence intensity of each acquisition period by using the fitting curve;
acquiring the change rate of the electric field intensity of the target transformer in the acquisition periods according to the microwave frequency corresponding to the light detection magnetic resonance spectrum trough of the acquisition periods;
and under the condition that the change rate of the electric field intensity is larger than a preset change threshold value, determining that the target transformer has partial discharge.
2. The method of claim 1, wherein said obtaining the modulated fluorescence intensity of the fluorescence signal of the diamond color center quantum sensor at each of the acquisition periods comprises:
transmitting laser signals to the diamond color center quantum sensor in each acquisition period; the laser signal is used for exciting the diamond color center quantum sensor to emit a fluorescent signal aiming at the laser signal;
and obtaining a modulated microwave signal aiming at the fluorescent signal, and modulating the fluorescent signal through the modulated microwave signal to obtain the modulated fluorescent intensity of the fluorescent signal.
3. The method of claim 2, wherein the modulated microwave signal comprises a first modulated microwave signal and a second modulated microwave signal; the modulated fluorescence intensity comprises a first modulated fluorescence intensity and a second modulated fluorescence intensity;
the obtaining the modulated microwave signal for the fluorescent signal, and modulating the fluorescent signal by the modulated microwave signal, to obtain the modulated fluorescent intensity of the fluorescent signal, includes:
acquiring a first modulation microwave frequency of the first modulation microwave signal and a second modulation microwave frequency of the second modulation microwave signal;
modulating the fluorescent signal based on the first modulated microwave frequency to obtain the first modulated fluorescent intensity;
modulating the fluorescent signal based on the second modulated microwave frequency to obtain the second modulated fluorescent intensity;
the obtaining, by using the fitting curve, a microwave frequency corresponding to a trough of a photodetection magnetic resonance spectrum of the fitting curve in each acquisition period based on the modulated fluorescence intensity of each acquisition period includes:
and determining a current fitting curve corresponding to the fitting curve by using the first modulation microwave frequency, the second modulation microwave frequency, the first modulation fluorescence intensity and the second modulation fluorescence intensity, and acquiring the microwave frequency corresponding to the trough of the photodetection magnetic resonance spectrum of the current fitting curve in each acquisition period.
4. The method of claim 1, wherein the obtaining the change rate of the electric field intensity of the target transformer in the plurality of acquisition periods according to the microwave frequency corresponding to the trough of the photodetection magnetic resonance spectrum in the plurality of acquisition periods comprises:
acquiring microwave frequency corresponding to a zero electric field light detection magnetic resonance trough of the target transformer in an unoperated state;
determining a difference value between the microwave frequency corresponding to the trough of the light detection magnetic resonance spectrum and the microwave frequency corresponding to the trough of the zero electric field light detection magnetic resonance spectrum as a microwave frequency offset;
acquiring the electric field intensity of the target transformer in each acquisition period according to the microwave frequency offset;
and acquiring the change rate of the electric field intensity of the target transformer in the plurality of acquisition periods according to the electric field intensity.
5. A quantum sensing-based partial discharge detection system for a transformer, the system comprising: a diamond color center quantum sensor and a detection system host device; the diamond color center quantum sensor comprises a diamond NV color center and a microwave antenna; the diamond color center quantum sensor is connected with the target transformer through optical fiber communication; the detection system host device is arranged at a position which meets a preset safety distance outside the target transformer; the detection system host device and the target transformer are connected through optical fiber and/or cable communication; the detection system host device comprises a microwave generator, a photoelectric detector and a main control unit; the microwave generator and the target transformer are connected in communication by a cable, wherein,
The microwave generator is used for acquiring fitting curves corresponding to the optical detection magnetic resonance spectrums of the diamond color center quantum sensors in the target transformer in a plurality of acquisition periods under the condition that the target transformer does not operate;
the photoelectric detector is used for acquiring the modulated fluorescence intensity of the fluorescence signal of the diamond color center quantum sensor in each acquisition period;
the main control unit is used for acquiring the microwave frequency corresponding to the light detection magnetic resonance spectrum trough of the fitting curve in each acquisition period based on the modulated fluorescence intensity of each acquisition period by using the fitting curve;
the main control unit is used for acquiring the electric field intensity change rate of the target transformer in the acquisition periods according to the microwave frequencies corresponding to the light detection magnetic resonance spectrum trough of the acquisition periods;
the main control unit is used for determining that the target transformer has partial discharge under the condition that the change rate of the electric field intensity is larger than a preset change threshold value.
6. The system of claim 5, wherein the quantum sensing-based transformer partial discharge detection system further comprises a laser light source; the laser light source is arranged on the detection system host device; the laser light source and the diamond color center quantum sensor are connected through optical fiber communication;
The laser light source is used for transmitting laser signals to the diamond color center quantum sensor in each acquisition period; the laser signal is used for exciting the diamond color center quantum sensor to emit a fluorescent signal aiming at the laser signal;
the diamond color center quantum sensor is further used for transmitting a fluorescent signal aiming at the laser signal under the condition that the diamond color center quantum sensor receives the laser signal;
the microwave generator is further configured to obtain a modulated microwave signal for the fluorescent signal, and modulate the fluorescent signal with the modulated microwave signal to obtain a modulated fluorescent intensity of the fluorescent signal.
7. A quantum sensing-based transformer partial discharge detection device, the device comprising:
the measuring module is used for acquiring fitting curves corresponding to the optical detection magnetic resonance spectrums of the diamond color center quantum sensors in the target transformer in a plurality of acquisition periods under the condition that the target transformer does not operate;
the acquisition module is used for acquiring the modulated fluorescence intensity of the fluorescence signal of the diamond color center quantum sensor in each acquisition period;
The first calculation module is used for acquiring the microwave frequency corresponding to the light detection magnetic resonance spectrum trough of the fitting curve in each acquisition period based on the modulated fluorescence intensity of each acquisition period by using the fitting curve;
the second calculation module is used for obtaining the change rate of the electric field intensity of the target transformer in the acquisition periods according to the microwave frequencies corresponding to the light detection magnetic resonance spectrum trough of the acquisition periods;
and the determining module is used for determining that the target transformer has partial discharge under the condition that the change rate of the electric field intensity is larger than a preset change threshold value.
8. A detection system host device comprising a memory and a processor, the memory storing a computer program, characterized in that the processor implements the steps of the method of any of claims 1-4 when executing the computer program.
9. A computer readable storage medium, on which a computer program is stored, characterized in that the computer program, when being executed by a processor, implements the steps of the method according to any of claims 1-4.
10. A computer program product comprising a computer program, characterized in that the computer program, when being executed by a processor, implements the steps of the method according to any one of claims 1-4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311207211.8A CN117250448A (en) | 2023-09-18 | 2023-09-18 | Quantum sensing-based transformer partial discharge detection method, device and system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311207211.8A CN117250448A (en) | 2023-09-18 | 2023-09-18 | Quantum sensing-based transformer partial discharge detection method, device and system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117250448A true CN117250448A (en) | 2023-12-19 |
Family
ID=89130655
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311207211.8A Pending CN117250448A (en) | 2023-09-18 | 2023-09-18 | Quantum sensing-based transformer partial discharge detection method, device and system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117250448A (en) |
-
2023
- 2023-09-18 CN CN202311207211.8A patent/CN117250448A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US11747370B2 (en) | Fiber-optic current transformer based on nitrogen-vacancy (NV) centers in diamond, and measurement method | |
| EP3779483A1 (en) | Energy storage device charging state fiber online monitoring system and method | |
| Hundley et al. | Nanosecond fluorimeter | |
| CN116113839A (en) | Quantum sensor | |
| JP6080130B2 (en) | In-situ battery monitoring system | |
| CN106841935A (en) | For the Time-Domain Measuring System and appraisal procedure of the assessment of dielectric ageing state | |
| CN109541672B (en) | Method and device for detecting electron spin transient information | |
| Anderson et al. | Quantum-optical spectroscopy for plasma electric field measurements and diagnostics | |
| CN117250448A (en) | Quantum sensing-based transformer partial discharge detection method, device and system | |
| CN111366833B (en) | Method for measuring activation energy of impurities in semiconductor | |
| Cai et al. | Investigation of an M-Sequence based impedance spectrum acquisition method for lithium-ion batteries from the engineering application perspective | |
| CN113945764B (en) | System and method for measuring dielectric constant of substance under composite field condition | |
| CN114720919B (en) | Microwave magnetic field measuring method and microwave magnetic field measuring system | |
| CN117213661A (en) | Transformer winding temperature measurement method, device, system and equipment based on quantum sensing | |
| JP7396787B2 (en) | Microcurrent detection device and microcurrent detection method | |
| CN108279284A (en) | A kind of transformer moisture tester | |
| CN204007656U (en) | A kind of based on the bimodal excitation formula of Brillouin scattering monitor | |
| CN111307327B (en) | Signal processing method and system for red light excited fluorescence lifetime demodulation temperature | |
| CN103409140B (en) | Method for improving luminous efficiency of tombarthite luminous materials by magnetic field | |
| CN115561271B (en) | Combined detection method for density and relaxation spectrum of aged nuclear magnetic protons of composite insulator | |
| CN111896581B (en) | Crack distribution detection method based on rock resistance change | |
| CN115556586B (en) | Battery module electric quantity estimation device | |
| US10488339B2 (en) | Frequency domain fluorescence measurement system | |
| CN202599836U (en) | Portable and rapid chemical substance detector | |
| CN114912515A (en) | Method for generating fluorescent substance database and method and device for identifying fluorescent substance |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |