Temperature detection method and device of electrical equipment, electronic equipment and storage medium

Abstract

The invention discloses a temperature detection method and device for electrical equipment, electronic equipment and a storage medium, a temperature measurement optical fiber of an optical fiber temperature measurement system is connected in series to a plurality of electrical equipment in a power system, after incident light signals are injected into the temperature measurement optical fiber and Raman scattering light signals are received, target electrical equipment of each Raman scattering light signal is determined, and the target electrical equipment is used for detecting the temperature of the electrical equipment. And calculating the actual temperature of the target electrical equipment based on the Raman scattering light signal of the target electrical equipment, judging whether the temperature of the target electrical equipment is abnormal or not based on the actual temperature, and if yes, generating alarm information about the abnormality of the target electrical equipment. One optical fiber is connected with a plurality of electrical devices in series for temperature monitoring and alarming when the temperature is abnormal, a temperature sensor does not need to be arranged, Raman scattering of the optical fiber is adopted for detecting the temperature of the electrical devices, the communication wiring cost of the temperature sensor and the sensor is saved, the optical fiber transmission distance is long, the anti-electromagnetic interference capability is high, and the reliability is high. The device is suitable for large-range electrical equipment temperature detection in water conservancy and hydropower engineering.

Description

Technical Field

[0001] The present invention relates to the technical field of electrical system monitoring, and particularly to a temperature detection method, device, electronic device, and storage medium for electrical equipment. Background Art

[0002] With the continuous expansion of the scale of water conservancy and hydropower projects, the long-term safe operation of the electrical system has become the key to ensuring project efficiency.

[0003] The water conservancy and hydropower project includes systems or electrical equipment such as water turbine units, generators, transformers, switchgear, transmission lines, distribution systems, and protection systems. In order to ensure the long-term safe operation of the water conservancy and hydropower project, an automated monitoring system is used to detect the temperature of electrical equipment in the water conservancy and hydropower project. The traditional method is to set temperature sensors on each electrical equipment to detect the temperature.

[0004] By setting sensors to detect the temperature of electrical equipment, there are various types of temperature sensors used, with different connection and communication methods. Moreover, the communication mainly uses twisted pairs to transmit via a switch, with limited communication distance and susceptibility to electromagnetic interference in the water conservancy and hydropower project. Summary of the Invention

[0005] The present invention provides a temperature detection method, device, electronic device, and storage medium for electrical equipment to solve the problems of various types of temperature sensors used in water conservancy and hydropower projects, different communication methods, high wiring costs, limited communication distance, and susceptibility to electromagnetic interference when using twisted pair communication.

[0006] In a first aspect, the present invention provides a temperature detection method for electrical equipment, which is applied to an optical fiber temperature measurement system. The temperature measurement optical fiber of the optical fiber temperature measurement system is connected in series to multiple electrical equipment in a power system, and includes:

[0007] Inject an incident optical signal into the temperature measurement optical fiber, and receive a Raman scattered optical signal from the temperature measurement optical fiber. The Raman scattered optical signal is an optical signal generated after the incident optical signal is affected by temperature at the electrical equipment.

[0008] Determine the target electrical equipment for each Raman scattered optical signal;

[0009] Calculate the actual temperature of the target electrical equipment based on the Raman scattered optical signal of the target electrical equipment;

[0010] Judge whether the target electrical equipment has an abnormal temperature based on the actual temperature;

[0011] If so, generate an alarm message for the abnormal target electrical equipment.

[0012] Optionally, determining the target electrical equipment for each Raman scattered optical signal includes:

[0013] Calculate the target distance from the scattering point of each of the Raman scattered light signals to the injection point of the incident light signal;

[0014] Look up the target electrical device that matches the target distance in a pre-configured comparison table of distances and electrical devices.

[0015] Optionally, calculating the actual temperature of the target electrical device based on the Raman scattered light signal of the target electrical device includes:

[0016] Separate the Raman scattered light signal of the target electrical device into a Stokes light signal and an anti-Stokes light signal;

[0017] Detect the Stokes light signal and the anti-Stokes light signal respectively to obtain the first light intensity and the first frequency of the Stokes light signal, and the second light intensity and the second frequency of the anti-Stokes light signal;

[0018] Calculate the actual temperature of the target electrical device using the first light intensity, the second light intensity, the first frequency, and the second frequency.

[0019] Optionally, separating the Raman scattered light signal of the target electrical device into a Stokes light signal and an anti-Stokes light signal includes:

[0020] Use a spectrometer to detect the Raman scattered light signal to obtain the optical signal frequency;

[0021] Determine the optical signal with an optical signal frequency less than the frequency of the incident light as the Stokes light signal;

[0022] Determine the optical signal with an optical signal frequency greater than the frequency of the incident light as the anti-Stokes light signal.

[0023] Optionally, calculating the actual temperature of the target electrical device using the first light intensity, the second light intensity, the first frequency, and the second frequency includes:

[0024] Invert the actual temperature of the target electrical device through the following formula:

[0025]

[0026] where, I as is the first light intensity of the Stokes light signal, I s is the second light intensity of the anti-Stokes light signal, v as is the first frequency of the Stokes light signal, v s is the second frequency of the anti-Stokes light signal, h is Planck's constant, Δv Ris the Raman shift of the temperature-measuring optical fiber, K B is the Boltzmann constant, and T is the temperature.

[0027] Optionally, determining whether the target electrical device has an abnormal temperature based on the actual temperature includes:

[0028] Obtaining the temperature range of the target electrical device;

[0029] Judging whether the actual temperature is within the temperature range within a preset duration;

[0030] If so, determining that the temperature of the target electrical device is normal;

[0031] If not, determining that the temperature of the target electrical device is abnormal.

[0032] Optionally, generating an alarm message for the abnormality of the target electrical device includes:

[0033] Generating a temperature curve of the target electrical device based on the actual temperature of the target electrical device within a preset duration;

[0034] Generating an alarm message including the location and temperature curve of the target electrical device.

[0035] In a second aspect, the present invention provides a temperature detection device for an electrical device, which is applied to an optical fiber temperature measurement system. The temperature measurement optical fiber of the optical fiber temperature measurement system is connected in series to multiple electrical devices in a power system, and includes:

[0036] An optical signal injection and reception module, configured to inject an incident optical signal into the temperature measurement optical fiber and receive a Raman scattered optical signal from the temperature measurement optical fiber. The Raman scattered optical signal is an optical signal generated after the incident optical signal is affected by temperature at the electrical device;

[0037] An electrical device determination module, configured to determine the target electrical device for each Raman scattered optical signal;

[0038] A temperature calculation module, configured to calculate the actual temperature of the target electrical device based on the Raman scattered optical signal of the target electrical device;

[0039] A temperature judgment module, configured to judge whether the target electrical device has an abnormal temperature based on the actual temperature; if so, execute the abnormal alarm module;

[0040] An abnormal alarm module, configured to generate an alarm message for the abnormality of the target electrical device.

[0041] In a third aspect, the present invention provides an electronic device, and the electronic device includes:

[0042] At least one processor; and

[0043] A memory communicatively connected to the at least one processor; wherein,

[0044] the memory stores a computer program executable by the at least one processor, and when the computer program is executed by the at least one processor, the at least one processor is enabled to execute the temperature detection method of the electrical device according to any one of the first aspects of the present invention.

[0045] In a fourth aspect, the present invention provides a computer-readable storage medium storing computer instructions for causing a processor to implement the temperature detection method of the electrical device according to any one of the first aspects of the present invention when executed.

[0046] In the embodiments of the present invention, a plurality of electrical devices in a power system are connected in series through a temperature measurement optical fiber. After injecting an incident optical signal into the temperature measurement optical fiber, a Raman scattered optical signal formed by the influence of the temperature of the electrical device is received from the temperature measurement optical fiber. Further, the actual temperature of the target electrical device is calculated based on the Raman scattered optical signal of the target electrical device, and it is determined whether the temperature of the target electrical device is abnormally high based on the actual temperature. If so, an alarm message indicating an abnormality of the target electrical device is generated, realizing temperature monitoring of a plurality of electrical devices connected in series through one optical fiber and alarming when the temperature is abnormally high. There is no need to set up temperature sensors, and the Raman scattering of the optical fiber is used to detect the temperature of the electrical device, saving the cost of temperature sensors and communication wiring. Moreover, the optical fiber has a long transmission distance and strong anti-electromagnetic interference ability, and is suitable for temperature detection of a large range of electrical devices in water conservancy and hydropower projects.

[0047] It should be understood that the content described in this part is not intended to identify the key or important features of the embodiments of the present invention, nor is it used to limit the scope of the present invention. Other features of the present invention will become easily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0048] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following will briefly introduce the drawings required for the description of the embodiments. Obviously, the following drawings are only some embodiments of the present invention. For those of ordinary skill in the art, other drawings can be obtained based on these drawings without creative efforts.

[0049] Figure 1 is a flowchart of a temperature detection method for an electrical device provided in Embodiment 1 of the present invention;

[0050] Figure 2 is a schematic diagram of an optical fiber temperature measurement system;

[0051] Figure 3 is a schematic diagram of the wiring of the temperature measurement optical fiber;

[0052] Figure 4 It is a flowchart of a temperature detection method for an electrical device provided in Embodiment 2 of the present invention;

[0053] Figure 5 It is a schematic structural diagram of a temperature detection device for an electrical device provided in Embodiment 3 of the present invention;

[0054] Figure 6 It is a schematic structural diagram of an electronic device provided in Embodiment 4 of the present invention. Specific embodiments

[0055] In order to enable those skilled in the art to better understand the solution of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without making creative efforts shall fall within the protection scope of the present invention.

[0056] Embodiment 1

[0057] Figure 1 It is a flowchart of a temperature detection method for an electrical device provided in Embodiment 1 of the present invention. This embodiment is applicable to the situation of using optical fibers to detect the temperature of electrical devices in water conservancy and hydropower projects. This method can be executed by a temperature detection device for an electrical device, and the temperature detection device for an electrical device can be implemented in the form of hardware and / or software and can be configured in an electronic device. As Figure 1 shown, the temperature detection method for the electrical device includes:

[0058] S101. Inject an incident optical signal into the temperature measurement optical fiber and receive a Raman scattered optical signal from the temperature measurement optical fiber. The Raman scattered optical signal is an optical signal generated after the incident optical signal is affected by temperature at the electrical device.

[0059] As Figure 2 shown, the optical fiber temperature measurement system of the embodiment of the present invention includes a laser generator, a WDM wavelength division module, a photoelectric detection module, an acquisition module, and an analysis module. Among them, the laser generator is connected to the WDM wavelength division module through a pigtail fiber, the WDM wavelength division module is connected to the temperature measurement optical fiber, the temperature measurement optical fiber is connected in series with multiple electrical devices in the water conservancy and hydropower project, the WDM wavelength division module is also connected to the photoelectric detection module, and the acquisition module is respectively connected to the photoelectric detection module and the analysis module.

[0060] Among them, the laser generator generates a laser signal with a stable frequency. This laser signal is transmitted through an optical fiber pigtail to the WDM wavelength division module. The WDM wavelength division module injects the laser signal as an incident optical signal into the temperature measurement optical fiber. At the electrical equipment, the temperature measurement optical fiber is affected by the temperature of the electrical equipment, and the Raman scattered optical signal generated by the incident light is transmitted backward through the temperature measurement optical fiber to the WDM wavelength division module. The WDM wavelength division module transmits the Raman scattered optical signal to the photoelectric detection module. After converting the optical signal into an electrical signal, the acquisition module acquires the relevant data of the Raman scattered optical signal and sends it to the analysis module for analysis to obtain the actual temperature of each electrical equipment.

[0061] As Figure 3 shown is the layout schematic diagram of the temperature measurement optical fiber in the water conservancy and hydropower project. In Figure 3 it, the electrical equipment includes water turbine units, generators, transformers, switchgear, protection systems, etc. The temperature measurement optical fiber can be attached or wound around the temperature measurement points of the electrical equipment. As Figure 3 shown by the red and blue lines in Figure 3 it, the red and blue lines are only schematic diagrams. In actual applications, the temperature measurement optical fiber is arranged at the temperature measurement points inside the electrical equipment.

[0062] In this embodiment, the laser generator can be controlled to generate an incident optical signal according to a preset period. Exemplarily, an incident optical signal can be injected into the temperature measurement optical fiber at intervals of 2 seconds, 5 seconds, etc., and the Raman scattered optical signal is received from the temperature measurement optical fiber. In each period, if multiple electrical equipment are connected in series to the temperature measurement optical fiber, multiple Raman scattered optical signals can be received.

[0063] S102. Determine the target electrical equipment for each Raman scattered optical signal.

[0064] Since one temperature measurement optical fiber is connected in series with multiple electrical equipment, the temperature at each electrical equipment affects the incident light in the temperature measurement optical fiber to form a Raman scattered optical signal. The target electrical equipment corresponding to each Raman scattered optical signal can be determined. Specifically, the distance from the scattering point of each Raman scattered optical signal to the injection point of the incident light can be calculated, and the target electrical equipment for each Raman scattered optical signal can be determined through this distance.

[0065] S103. Calculate the actual temperature of the target electrical equipment based on the Raman scattered optical signal of the target electrical equipment.

[0066] Specifically, for each Raman scattered optical signal, it can be separated into a Stokes optical signal and an anti-Stokes optical signal, and the optical intensity and frequency of the Stokes optical signal and the anti-Stokes optical signal are detected, and the actual temperature of the target electrical equipment is calculated through the optical intensity and frequency.

[0067] S104. Determine whether the target electrical equipment has an abnormal temperature based on the actual temperature.

[0068] In an alternative embodiment, different electrical devices may preset the temperature range during normal operation. It is possible to determine whether the actual temperature is within the configured temperature range. If so, it is determined that the temperature of the target electrical device is normal. If not, it is determined that the temperature of the target front-end device is abnormal, and S105 may be executed.

[0069] S105. Generate an alarm message for the abnormality of the target electrical device.

[0070] When the temperature of the target electrical device is abnormal, the target electrical device may be abnormal, and an alarm message for the abnormality of the target electrical device may be generated. The alarm message may include information such as the location, name, number, actual temperature, and temperature detection time of the target electrical device.

[0071] In the embodiment of the present invention, a plurality of electrical devices in the power system are connected in series through a temperature-measuring optical fiber. After injecting an incident optical signal into the temperature-measuring optical fiber, the Raman scattered optical signal formed by the influence of the electrical device temperature is received from the temperature-measuring optical fiber. Further, the actual temperature of the target electrical device is calculated based on the Raman scattered optical signal of the target electrical device. Based on the actual temperature, it is determined whether the target electrical device has a temperature abnormality. If so, an alarm message for the abnormality of the target electrical device is generated, realizing temperature monitoring of a plurality of electrical devices connected in series through one optical fiber and alarming when the temperature is abnormally high. There is no need to set temperature sensors. The temperature of electrical devices is detected by using the Raman scattering of optical fibers, saving the cost of temperature sensors and communication wiring. Moreover, the optical fiber has a long transmission distance and strong anti-electromagnetic interference ability, and is suitable for temperature detection of a large range of electrical devices in water conservancy and hydropower projects.

[0072] Embodiment 2

[0073] Figure 4 As shown in the flowchart of a temperature detection method for an electrical device provided in Embodiment 2 of the present invention, Embodiment 2 of the present invention is optimized on the basis of Embodiment 1 above. For example Figure 4 as shown, the temperature detection method for the electrical device includes:

[0074] S401. Inject an incident optical signal into the temperature-measuring optical fiber and receive the Raman scattered optical signal from the temperature-measuring optical fiber.

[0075] For example Figure 2 as shown, it is possible to control the laser generator to generate an incident optical signal according to a preset period and inject the incident optical signal into the temperature-measuring optical fiber through the WDM wavelength division module. At each electrical device, the temperature-measuring optical fiber generates a Raman scattered optical signal affected by the temperature of the electrical device, and the WDM wavelength division module can receive the Raman scattered optical signal reflected at each electrical device.

[0076] S402. Calculate the target distance from the scattering point of each Raman scattered optical signal to the injection point of the incident optical signal.

[0077] In one embodiment, the target distance L can be calculated by the following formula:

[0078]

[0079] Wherein, t2 is the time when the Raman scattered light signal is received, t1 is the time when the incident light is injected into the temperature measuring optical fiber, c is the transmission speed of light, and n is the refractive index of the temperature measuring optical fiber.

[0080] In this embodiment, the time t1 can be recorded when the laser generator generates the incident light signal and injects it into the temperature measuring optical fiber, and the time t2 can be recorded when the Raman scattered light signal is received. Substituting the times t1 and t2 into the calculation formula of the target distance L, the distance from the scattering point of each Raman scattered light signal to the injection point can be obtained. This target distance L is also the distance from the electrical equipment to the injection point of the incident light signal.

[0081] S403. Search for the target electrical equipment that matches the target distance in the pre-configured comparison table of distance and electrical equipment.

[0082] After the temperature measuring optical fiber is connected in series with each electrical equipment in this embodiment, the electrical equipment can be calibrated to determine the distance from the electrical equipment to the incident light injection point. The following figure shows a schematic diagram of Table 1:

[0083] Equipment Number Distance Temperature Range Electrical Equipment A 1.0Km 10℃-75℃ Electrical Equipment B 1.5Km -10℃-55℃ Electrical Equipment C 2.0Km 2℃-65℃

[0084] As shown in the above Table 1, the comparison table includes the electrical equipment numbers and their corresponding distances. Through the above Table 1, the target electrical equipment that matches each target distance can be determined, so as to obtain the Raman scattered light signals at each target electrical equipment.

[0085] S404. Separate the Raman scattered light signal of the target electrical equipment into a Stokes light signal and an anti-Stokes light signal.

[0086] Raman scattering is an inelastic scattering phenomenon that occurs when light interacts with matter, manifested as a difference between the frequency of the scattered light and the frequency of the incident light, resulting in a Raman shift in the frequency of the scattered light. Its value is determined by the energy exchange amount generated by the vibration of photons and the molecules of the optical fiber material. The scattered light can be divided into Stokes light and anti-Stokes light. Among them, Stokes light belongs to low-frequency light and is insensitive to temperature, while anti-Stokes light is high-frequency light and is sensitive to temperature changes. By comparing the light intensities of Stokes light and anti-Stokes light, it can be used to detect temperature. Therefore, it is necessary to separate the Raman scattered light signal into a Stokes light signal and an anti-Stokes light signal.

[0087] In one embodiment, a spectrometer can be used to detect the Raman scattered light signal to obtain the optical signal frequency. The optical signal with an optical signal frequency less than the frequency of the incident light is determined as the Stokes light signal, and the optical signal with an optical signal frequency greater than the frequency of the incident light is determined as the anti-Stokes light signal.

[0088] In another embodiment, a grating can also be added to the fiber optic temperature measurement system to separate the Raman scattered light signal into a Stokes light signal and an anti-Stokes light signal through the grating. The separation method of the Stokes light signal and the anti-Stokes light signal in this embodiment is not limited.

[0089] S405. Detect the Stokes light signal and the anti-Stokes light signal respectively to obtain the first light intensity and the first frequency of the Stokes light signal, and the second light intensity and the second frequency of the anti-Stokes light signal.

[0090] In one embodiment, as Figure 2 shown, the Stokes light signal and the anti-Stokes light signal can be converted into electrical signals through a photoelectric detection module, that is, photoelectric conversion. Then, after processing the electrical signals after photoelectric conversion, the first light intensity and the first frequency of the Stokes light signal, and the second light intensity and the second frequency of the anti-Stokes light signal are further processed after sampling the electrical signals in the acquisition module. Exemplarily, the optical signal can be converted into a voltage signal, and the light intensity and frequency are obtained by sampling and processing the voltage signal.

[0091] S406. Calculate the actual temperature of the target electrical equipment using the first light intensity, the second light intensity, the first frequency, and the second frequency.

[0092] Specifically, the actual temperature of the target electrical equipment can be inverted through the following formula:

[0093]

[0094] where I as is the first light intensity of the Stokes light signal, I s is the second light intensity of the anti-Stokes light signal, v as is the first frequency of the Stokes light signal, v s is the second frequency of the anti-Stokes light signal, h is Planck's constant, Δv R is the Raman frequency shift of the temperature measurement optical fiber, K B is the Boltzmann constant, and T is the temperature.

[0095] Through the above formula, the inversion formula for the actual temperature T is as follows:

[0096]

[0097] After determining the first optical intensity and the first frequency of the Stokes optical signal and the second optical intensity and the second frequency of the anti-Stokes optical signal, substituting them into the inversion formula of the actual temperature T, the actual temperature T of the target electrical equipment in the current cycle can be obtained.

[0098] S407. Obtain the temperature range of the target electrical equipment.

[0099] For the above-mentioned look-up table 1, a temperature range can be pre-configured for each electrical equipment, and the temperature range of the electrical equipment can be retrieved by looking up the number of the electrical equipment.

[0100] S408. Determine whether the actual temperature is within the temperature range within the preset duration.

[0101] To avoid misjudgment caused by temperature jitter, multiple actual temperatures of the electrical equipment detected within the preset duration (multiple cycles) can be obtained, and it can be determined whether all the multiple actual temperatures are within the temperature range, or the average temperature of the multiple actual temperatures can be calculated and it can be determined whether the average temperature is within the temperature range. If so, execute S409; if not, execute S410.

[0102] S409. Determine that the temperature of the target electrical equipment is normal.

[0103] If the actual temperature of the electrical equipment is within the temperature range within the preset duration, it can be determined that the temperature of the target electrical equipment is normal, and return to S401 to continue injecting the incident optical signal into the temperature measurement optical fiber.

[0104] S410. Determine that the temperature of the target electrical equipment is abnormal and generate an alarm message for the abnormality of the target electrical equipment. If the actual temperature of the electrical equipment is outside the temperature range within the preset duration, it is determined that the temperature of the target electrical equipment is abnormal, and a temperature curve of the target electrical equipment can be generated based on the actual temperature of the target electrical equipment within the preset duration, and an alarm message including the location of the target electrical equipment and the temperature curve can be generated.

[0105] Optionally, the alarm message can also include the fault information and measures of the electrical equipment. Exemplarily:

[0106] Hydro turbine unit and generator monitoring: Real-time monitor the temperature distribution of the hydro turbine unit and the generator. If a local temperature is detected to rise abnormally, the fault information can be mechanical component wear, poor lubrication, or overloading, etc.

[0107] Transformer monitoring: Monitor the temperature of the transformer winding. The temperature measurement optical fiber can be wound around the transformer winding. When the detected temperature approaches the critical value, the system can give an early warning and adjust the operating parameters (such as reducing the load or starting the cooling system) to avoid faults such as insulation aging, short circuit, and even fire caused by the overheating of the transformer.

[0108] Switchgear monitoring: Monitor the temperature change of the switchgear. If an instantaneous abnormal increase in the switchgear temperature is detected, the fault information can be poor contact, partial discharge, overload, etc. It is necessary to immediately check the status of the switchgear to ensure its normal operation.

[0109] Power transmission line monitoring: Monitor the temperature distribution of the power transmission line. If a local over-temperature is detected, the fault information can be damaged cable outer sheath, loose joint, overload, etc.; if a local under-temperature is detected, the fault information can be line immersion or too low ambient temperature, etc. The system can give an early warning in time according to the temperature change to avoid line faults.

[0110] Distribution system and protection system monitoring: Real-time monitor the temperature of each key connection point, line and equipment. By analyzing the temperature data, potential faults (such as poor contact, overload, etc.) can be detected in time, the operation parameters can be optimized, and the operation efficiency and reliability of the unit can be improved.

[0111] After generating the alarm information, the alarm information can be sent to the terminal device of the management personnel, and an audible and visual alarm and the display of the alarm information are carried out on the terminal device, so that the management personnel can dispatch maintenance personnel to the site of the electrical equipment for verification and take corresponding measures in time to handle the abnormal temperature event of the electrical equipment.

[0112] In the embodiment of the present invention, a plurality of electrical equipment in the power system are connected in series through a temperature measurement optical fiber. After injecting an incident optical signal into the temperature measurement optical fiber, a Raman scattered optical signal formed by the influence of the electrical equipment temperature is received from the temperature measurement optical fiber. Calculate the target distance from the scattering point of each Raman scattered optical signal to the injection point of the incident optical signal, match the target electrical equipment through the target distance, separate the Raman scattered optical signal of the target electrical equipment into a Stokes optical signal and an anti-Stokes optical signal, and respectively detect the Stokes optical signal and the anti-Stokes optical signal to obtain the first light intensity and the first frequency of the Stokes optical signal, and the second light intensity and the second frequency of the anti-Stokes optical signal. Calculate the actual temperature of the target electrical equipment by using the first light intensity, the second light intensity, the first frequency and the second frequency, and judge whether the actual temperature is within the temperature range within a preset time period. If not, determine that the temperature of the target electrical equipment is abnormal and generate an alarm information for the abnormality of the target electrical equipment. It realizes temperature monitoring of multiple electrical equipment connected in series through one optical fiber and alarm when the temperature is abnormal. There is no need to set temperature sensors, and the Raman scattering of the optical fiber is used to detect the temperature of the electrical equipment, saving the cost of temperature sensors and communication wiring. Moreover, the optical fiber has a long transmission distance and strong anti-electromagnetic interference ability, and is suitable for temperature detection of a large range of electrical equipment in water conservancy and hydropower projects.

[0113] Embodiment III

[0114] Figure 5 It is a schematic structural diagram of a temperature detection device for an electrical equipment provided in Embodiment III of the present invention. AsFigure 5 As shown in Figure 5 , the temperature detection device of the electrical equipment is applied to an optical fiber temperature measurement system. The temperature measurement optical fiber of the optical fiber temperature measurement system is connected in series to a plurality of electrical equipment in the power system, including:

[0115] An optical signal injection and reception module 501, configured to inject an incident optical signal into the temperature measurement optical fiber and receive a Raman scattered optical signal from the temperature measurement optical fiber. The Raman scattered optical signal is an optical signal generated after the incident optical signal is affected by temperature at the electrical equipment;

[0116] An electrical equipment determination module 502, configured to determine the target electrical equipment for each Raman scattered optical signal;

[0117] A temperature calculation module 503, configured to calculate the actual temperature of the target electrical equipment based on the Raman scattered optical signal of the target electrical equipment;

[0118] A temperature judgment module 504, configured to judge whether the target electrical equipment has an abnormal temperature based on the actual temperature; if so, execute an abnormal alarm module 505;

[0119] An abnormal alarm module 505, configured to generate an alarm message for the abnormality of the target electrical equipment.

[0120] Optionally, the electrical equipment determination module 502 includes:

[0121] A distance calculation unit, configured to calculate the target distance from the scattering point of each Raman scattered optical signal to the injection point of the incident optical signal;

[0122] An electrical equipment matching unit, configured to search for the target electrical equipment that matches the target distance in a pre-configured comparison table of distance and electrical equipment.

[0123] Optionally, the temperature calculation module 503 includes:

[0124] A beam splitting unit, configured to separate the Raman scattered optical signal of the target electrical equipment into a Stokes optical signal and an anti-Stokes optical signal;

[0125] An optical intensity and optical frequency detection unit, configured to respectively detect the Stokes optical signal and the anti-Stokes optical signal to obtain the first optical intensity and the first frequency of the Stokes optical signal, and the second optical intensity and the second frequency of the anti-Stokes optical signal;

[0126] A temperature calculation unit, configured to calculate the actual temperature of the target electrical equipment by using the first optical intensity, the second optical intensity, the first frequency, and the second frequency.

[0127] Optionally, the beam splitting unit is specifically configured to:

[0128] The Raman scattered light signal is detected by a spectrometer to obtain the optical signal frequency;

[0129] The optical signal with an optical signal frequency less than the frequency of the incident light is determined as the Stokes optical signal;

[0130] The optical signal with an optical signal frequency greater than the frequency of the incident light is determined as the anti-Stokes optical signal.

[0131] Optionally, the temperature calculation unit is specifically configured to:

[0132] Invert the actual temperature of the target electrical equipment through the following formula:

[0133]

[0134] where I as is the first light intensity of the Stokes optical signal, I s is the second light intensity of the anti-Stokes optical signal, v as is the first frequency of the Stokes optical signal, v s is the second frequency of the anti-Stokes optical signal, h is Planck's constant, Δv R is the Raman frequency shift of the temperature measurement optical fiber, K B is the Boltzmann constant, and T is the temperature.

[0135] Optionally, the temperature judgment module 504 includes:

[0136] A temperature range acquisition unit for acquiring the temperature range of the target electrical equipment;

[0137] A temperature judgment unit for judging whether the actual temperature is within the temperature range within a preset time period; if so, execute the normal temperature determination unit, and if not, execute the abnormal temperature determination unit;

[0138] A normal temperature determination unit for determining that the temperature of the target electrical equipment is normal;

[0139] An abnormal temperature determination unit for determining that the temperature of the target electrical equipment is abnormal.

[0140] Optionally, the abnormal alarm module 505 includes:

[0141] A temperature curve generation unit for generating a temperature curve of the target electrical equipment based on the actual temperature of the target electrical equipment within a preset time period;

[0142] An alarm information generation unit for generating alarm information including the position of the target electrical equipment and the temperature curve.

[0143] The temperature detection device of the electrical equipment provided by the embodiments of the present invention can execute the temperature detection method of the electrical equipment provided by any embodiment of the present invention, and has the corresponding functional modules and beneficial effects for executing the method.

[0144] Embodiment 4

[0145] Figure 6 FIG. shows a schematic structural diagram of an electronic device 60 that can be used to implement the embodiments of the present invention. The electronic device is intended to represent various forms of digital computers, such as, laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as, personal digital processors, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely illustrative and are not intended to limit the implementation of the present invention described and / or claimed herein.

[0146] As Figure 6 shown, the electronic device 60 includes at least one processor 61, and a memory communicatively connected to the at least one processor 61, such as a read-only memory (ROM) 62, a random access memory (RAM) 63, etc. Among them, the memory stores a computer program executable by the at least one processor. The processor 61 can execute various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 62 or the computer program loaded from the storage unit 68 into the random access memory (RAM) 63. In the RAM 63, various programs and data required for the operation of the electronic device 60 can also be stored. The processor 61, the ROM 62, and the RAM 63 are connected to each other through a bus 64. The input / output (I / O) interface 65 is also connected to the bus 64.

[0147] A plurality of components in the electronic device 60 are connected to the I / O interface 65, including: an input unit 66, such as a keyboard, a mouse, etc.; an output unit 67, such as various types of displays, speakers, etc.; a storage unit 68, such as a magnetic disk, an optical disk, etc.; and a communication unit 69, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 69 allows the electronic device 60 to exchange information / data with other devices through a computer network such as the Internet and / or various telecommunication networks.

[0148] The processor 61 can be various general-purpose and / or special-purpose processing components with processing and computing capabilities. Some examples of the processor 61 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various dedicated artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any suitable processor, controller, microcontroller, etc. The processor 61 executes the various methods and processes described above, such as the temperature detection method of the electrical device.

[0149] In some embodiments, the temperature detection method of the electrical device can be implemented as a computer program, which is tangibly contained in a computer-readable storage medium, such as the storage unit 68. In some embodiments, part or all of the computer program can be loaded and / or installed onto the electronic device 60 via the ROM 62 and / or the communication unit 69. When the computer program is loaded into the RAM 63 and executed by the processor 61, one or more steps of the temperature detection method of the electrical device described above can be executed. Alternatively, in other embodiments, the processor 61 can be configured to execute the temperature detection method of the electrical device in any other suitable manner (e.g., by means of firmware).

[0150] Various embodiments of the systems and techniques described above herein can be implemented in digital electronic circuit systems, integrated circuit systems, field-programmable gate arrays (FPGAs), application-specific integrated circuits (ASICs), application-specific standard products (ASSPs), systems-on-a-chip (SOCs), complex programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include: being implemented in one or more computer programs, which can be executed and / or interpreted on a programmable system including at least one programmable processor, the programmable processor can be a dedicated or general-purpose programmable processor, can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit the data and instructions to the storage system, the at least one input device, and the at least one output device.

[0151] The computer program for implementing the method of the present invention can be written in any combination of one or more programming languages. These computer programs can be provided to the processor of a general-purpose computer, a special-purpose computer, or other programmable data processing devices, such that when the computer program is executed by the processor, the functions / operations specified in the flowchart and / or block diagram are implemented. The computer program can be executed entirely on the machine, partially on the machine, be executed partially on the machine and partially on a remote machine as an independent software package, or be executed entirely on a remote machine or server.

[0152] In the context of the present invention, a computer-readable storage medium can be a tangible medium that can contain or store a computer program for use by or in connection with an instruction execution system, apparatus, or device. The computer-readable storage medium can include, but is not limited to, electronic, magnetic, optical, electromagnetic, infrared, or semiconductor systems, apparatus, or devices, or any suitable combination of the foregoing. Alternatively, the computer-readable storage medium can be a machine-readable signal medium. More specific examples of the machine-readable storage medium would include an electrical connection based on one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or Flash memory), an optical fiber, a portable compact disc read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the foregoing.

[0153] For providing interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and a pointing device (e.g., a mouse or a trackball) by which the user can provide input to the electronic device. Other kinds of devices can also be used for providing interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, speech input, or tactile input).

[0154] The systems and techniques described herein can be implemented in a computing system including a back-end component (e.g., as a data server), or a computing system including a middleware component (e.g., an application server), or a computing system including a front-end component (e.g., a user computer having a graphical user interface or a web browser through which the user can interact with an implementation of the systems and techniques described herein), or a computing system including any combination of such back-end, middleware, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0155] A computing system may include a client and a server. The client and the server are generally far from each other and usually interact via a communication network. The client-server relationship is created by computer programs running on respective computers and having a client-server relationship with each other. The server may be a cloud server, also known as a cloud computing server or a cloud host, which is a host product in the cloud computing service system, solving the defects of difficult management and weak business scalability existing in traditional physical hosts and VPS services.

[0156] It should be understood that various forms of the processes shown above can be used, with steps reordered, added, or deleted. For example, the steps recited in the present invention can be executed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved, and no limitation is imposed herein.

[0157] The above specific embodiments do not constitute a limitation on the protection scope of the present invention. Those skilled in the art should understand that various modifications, combinations, sub-combinations, and substitutions can be made according to design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention shall be included within the protection scope of the present invention.

Claims

1. A temperature detection method for an electrical device, characterized in that, Applied to an optical fiber temperature measurement system, the temperature measurement optical fiber of the optical fiber temperature measurement system is connected in series to a plurality of electrical devices in the power system, including: Inject an incident optical signal into the temperature measurement optical fiber and receive a Raman scattered optical signal from the temperature measurement optical fiber, where the Raman scattered optical signal is an optical signal generated after the incident optical signal is affected by temperature at the electrical device; Determine the target electrical device for each Raman scattered optical signal; Calculate the actual temperature of the target electrical device based on the Raman scattered optical signal of the target electrical device; Judge whether the temperature of the target electrical device is abnormally high based on the actual temperature; If so, generate an alarm message indicating that the target electrical device is abnormal.

2. The temperature detection method of the electrical equipment according to claim 1, wherein Determine the target electrical device for each Raman scattered optical signal, including: Calculate the target distance from the scattering point of each Raman scattered optical signal to the injection point of the incident optical signal; Search in a pre-configured comparison table of distances and electrical devices for the target electrical device that matches the target distance.

3. The temperature detection method of the electrical equipment according to claim 1, wherein, Calculate the actual temperature of the target electrical device based on the Raman scattered optical signal of the target electrical device, including: Separate the Raman scattered optical signal of the target electrical device into a Stokes optical signal and an anti-Stokes optical signal; Detect the Stokes optical signal and the anti-Stokes optical signal respectively to obtain the first optical intensity and the first frequency of the Stokes optical signal, and the second optical intensity and the second frequency of the anti-Stokes optical signal; Calculate the actual temperature of the target electrical device using the first optical intensity, the second optical intensity, the first frequency, and the second frequency.

4. The temperature detection method of the electrical equipment according to claim 3, wherein Separate the Raman scattered optical signal of the target electrical device into a Stokes optical signal and an anti-Stokes optical signal, including: Detect the Raman scattered optical signal using a spectrometer to obtain the optical signal frequency; Determine the optical signal with an optical signal frequency less than the frequency of the incident light as the Stokes optical signal; Determine the optical signal with an optical signal frequency greater than the frequency of the incident light as the anti-Stokes optical signal.

5. The temperature detection method of the electrical equipment according to claim 3, characterized in that, Calculate the actual temperature of the target electrical device using the first optical intensity, the second optical intensity, the first frequency, and the second frequency, including: Invert the actual temperature of the target electrical device through the following formula: Wherein, I as is the first optical intensity of the Stokes optical signal, I s is the second optical intensity of the anti-Stokes optical signal, v as is the first frequency of the Stokes optical signal, v s is the second frequency of the anti-Stokes optical signal, h is Planck's constant, Δv R is the Raman frequency shift of the temperature-measuring optical fiber, K B is the Boltzmann constant, and T is the temperature.

6. The temperature detection method of the electrical equipment according to any one of claims 1-5, characterized in that Judge whether the temperature of the target electrical device is abnormally high based on the actual temperature, including: Obtain the temperature range of the target electrical device; Judge whether the actual temperature is within the temperature range within a preset time period; If so, determine that the temperature of the target electrical device is normal; If not, determine that the temperature of the target electrical device is abnormally high.

7. The temperature detection method of the electrical equipment according to any one of claims 1-5, characterized in that, Generate an alarm message indicating that the target electrical device is abnormal, including: Generate a temperature curve of the target electrical device based on the actual temperature of the target electrical device within a preset time period; Generate an alarm message including the location and temperature curve of the target electrical device.

8. A temperature detection device for an electrical equipment, characterized in that, Applied to an optical fiber temperature measurement system, the temperature measurement optical fiber of the optical fiber temperature measurement system is connected in series to a plurality of electrical devices in the power system, including: An optical signal injection and reception module for injecting an incident optical signal into a temperature measurement optical fiber and receiving a Raman scattered optical signal from the temperature measurement optical fiber, where the Raman scattered optical signal is an optical signal generated after the incident optical signal is affected by temperature at an electrical device; An electrical device determination module for determining the target electrical device for each Raman scattered optical signal; A temperature calculation module for calculating the actual temperature of the target electrical device based on the Raman scattered optical signal of the target electrical device; A temperature judgment module for judging whether the target electrical device has an abnormal temperature based on the actual temperature; if so, execute the abnormal alarm module; An abnormal alarm module for generating an alarm message for the abnormality of the target electrical device.

9. An electronic device, characterized in that, The electronic device includes: At least one processor; and A memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor, and the computer program is executed by the at least one processor so that the at least one processor can execute the temperature detection method of the electrical device according to any one of claims 1-7.

10. A computer-readable storage medium, characterized in that, The computer-readable storage medium stores computer instructions for causing a processor to implement the temperature detection method of the electrical device according to any one of claims 1-7 when executed.

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