Power transmission and transformation equipment operation state monitoring device

Abstract

The invention relates to the technical field of power transmission and transformation equipment monitoring, in particular to a power transmission and transformation equipment running state monitoring device, which is characterized in that a monitoring module acquires a power transmission and transformation line image, an insulator near electromagnetic wave signal and an insulator infrared image, a classification module divides dynamic influence categories, and a selection unit selects a monitoring mode for power transmission and transformation equipment; comprising the following steps: judging whether the running state of the power transmission and transformation equipment is abnormal or not based on temperature distribution change, or classifying the running environment of the power transmission and transformation equipment, and adjusting a monitoring strategy: calculating a dynamic representation value according to the intensity of an electromagnetic wave signal and a fitting value, and judging whether the running state of the power transmission and transformation equipment is abnormal or not; or, according to the current and voltage of the power transmission and transformation equipment, whether the operation state of the power transmission and transformation equipment is abnormal is judged, the operation environment of the power transmission and transformation equipment is divided, different monitoring modes for the operation state of the power transmission and transformation equipment are adopted, and the reliability of monitoring the operation state of the power transmission and transformation equipment is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of power transmission and transformation equipment monitoring, and particularly to a device for monitoring the operating state of power transmission and transformation equipment. Background Art

[0002] The monitoring of power transmission and transformation equipment is crucial for ensuring the safe and reliable operation of the power system. The monitoring system can track the operating state of the equipment in real time, detect and prevent potential faults and damages in a timely manner, thereby avoiding power outages and economic losses.

[0003] Chinese Patent Publication No.: CN116027153A, discloses a monitoring system for power transmission and transformation equipment. The invention sets sensing devices for monitoring traveling wave signals, ultra-high frequency partial discharge signals, video signals, and environmental signals on the transmission line busbars in scenarios such as tunnels and culverts. By using this sensing device, comprehensive monitoring of the transmission line is realized, and the set sensing devices are collected through a receiving device and sent by the receiving device to a data processing device for subsequent processing, so as to achieve comprehensive monitoring of the transmission line and power transmission equipment. It can reduce the operation and inspection pressure of personnel, improve the stability and safety of the line and equipment, and reduce the potential safety hazards and economic losses caused by the failure to handle equipment abnormalities in a timely manner due to inconvenient inspection.

[0004] However, the following problems still exist in the prior art: In the prior art, the operating state of the power transmission and transformation line is not divided according to the swing amplitude of the power transmission and transformation line. In actual situations, the swing of the power transmission and transformation line will affect the working state of the insulator, and the working state of the power transmission and transformation equipment is not divided according to the ambient temperature of the power transmission and transformation equipment. In actual situations, an overcooled or overheated environment is more likely to cause abnormal operation of the power transmission and transformation equipment, resulting in a lower reliability of the monitoring of the operating state of the power transmission and transformation equipment. Summary of the Invention

[0005] For this reason, the present invention provides a device for monitoring the operating state of power transmission and transformation equipment to overcome the problems in the prior art that the operating state of the power transmission and transformation line is not divided according to the swing amplitude of the power transmission and transformation line. In actual situations, the swing of the power transmission and transformation line will affect the working state of the insulator, and the working state of the power transmission and transformation equipment is not divided according to the ambient temperature of the power transmission and transformation equipment. In actual situations, an overcooled or overheated environment is more likely to cause abnormal operation of the power transmission and transformation equipment, resulting in a lower reliability of the monitoring of the operating state of the power transmission and transformation equipment.

[0006] To achieve the above object, the present invention provides a device for monitoring the operating state of power transmission and transformation equipment, including: A monitoring module, including an image acquisition unit for acquiring images of the power transmission and transformation line, a radio monitoring unit for acquiring electromagnetic wave signals near the insulator, and an infrared monitoring unit for acquiring infrared images of the insulator; A classification module, which is connected to the monitoring module and is used to identify the swing amplitude of the power transmission and transformation line based on the power transmission and transformation line image, so as to classify the dynamic influence category of the power transmission and transformation line; A host computer, which is respectively connected to the monitoring module and the classification module, and includes a selection unit and an early warning unit, The selection unit is used to select the monitoring method for power transmission and transformation equipment according to the dynamic influence category, including, Continuously obtain the infrared image of the insulator, and determine whether the operation state of the power transmission and transformation equipment is abnormal based on the change of temperature distribution; Or, classify the operation environment category of the power transmission and transformation equipment according to the ambient temperature, including the extreme environment category and the non-extreme environment category, and adjust the monitoring strategy according to the operation environment category of the power transmission and transformation equipment, including, Obtain the electromagnetic wave signal near the insulator when the extreme environment category is obtained, construct the relationship curve between the operating temperature and the power of the power transmission and transformation equipment to obtain the fitting value with the historical sample curve, and calculate the dynamic characterization value according to the intensity of the electromagnetic wave signal and the fitting value to determine whether the operation state of the power transmission and transformation equipment is abnormal; Or, continuously monitor the current and voltage of the power transmission and transformation equipment in the non-extreme environment category to determine whether the operation state of the power transmission and transformation equipment is abnormal; The early warning unit is used to send out an early warning signal according to the determination result of the selection unit.

[0007] Further, the classification module selects a number of points with equal spacing on the power transmission and transformation line in the power transmission and transformation line image, respectively obtains the distances between the corresponding points and a number of points on the power transmission and transformation line in the pre-stored standard power transmission and transformation line image, and uses the average distance to represent the swing amplitude.

[0008] Further, the classification module compares the swing amplitude with a preset swing amplitude comparison threshold, If the swing amplitude is less than the preset swing amplitude comparison threshold, the dynamic influence category of the power transmission and transformation line is the weak dynamic influence category; If the swing amplitude is greater than or equal to the preset swing amplitude comparison threshold, the dynamic influence category of the power transmission and transformation line is the strong dynamic influence category.

[0009] Further, the selection unit selects the monitoring method for power transmission and transformation equipment according to the dynamic influence category, If the dynamic influence category of the power transmission and transformation line is the weak dynamic influence category, the selection unit classifies the operation environment category of the power transmission and transformation equipment according to the ambient temperature and adjusts the monitoring strategy according to the operation environment category of the power transmission and transformation equipment; If the dynamic influence category of the power transmission and transformation line is the strong dynamic influence category, the selection unit continuously obtains the infrared image of the insulator and determines whether the operation state of the power transmission and transformation equipment is abnormal based on the change of temperature distribution.

[0010] Further, the selection unit obtains the maximum temperature difference and the maximum temperature value in the infrared image of the insulator, compares the maximum temperature difference with a preset temperature difference comparison threshold, and compares the maximum temperature value with a preset maximum temperature comparison threshold. If the maximum temperature difference is greater than the preset temperature difference comparison threshold, or the maximum temperature value is greater than the preset maximum temperature comparison threshold, the selection unit determines that the operating state of the power transmission and transformation equipment is abnormal.

[0011] Further, the selection unit compares the current ambient temperature with a preset first temperature comparison threshold and a preset second temperature comparison threshold. If the current ambient temperature is greater than the preset first temperature comparison threshold, or the current temperature is less than the preset second temperature comparison threshold, the selection unit classifies the operating environment category of the power transmission and transformation equipment as an extreme environment category. If the current ambient temperature is less than the preset first temperature comparison threshold and greater than the preset second temperature comparison threshold, the selection unit classifies the operating environment category of the power transmission and transformation equipment as a non-extreme environment category.

[0012] Further, the selection unit calculates a dynamic characterization value according to formula (1). (1) In formula (1), D represents the dynamic characterization value, I represents the electromagnetic wave signal intensity, I0 represents the preset electromagnetic wave signal intensity threshold, Y0 represents the preset fitting value threshold, and Y represents the fitting value.

[0013] Further, the selection unit compares the dynamic characterization value with a preset dynamic characterization value comparison threshold. If the dynamic characterization value is greater than the preset dynamic characterization value comparison threshold, the selection unit determines that the operating state of the power transmission and transformation equipment is abnormal.

[0014] Further, the selection unit compares the current of the power transmission and transformation equipment with a preset current range comparison threshold, and compares the voltage of the power transmission and transformation equipment with a preset voltage range comparison threshold. If the current of the power transmission and transformation equipment exceeds the preset current range comparison threshold, or if the voltage of the power transmission and transformation equipment exceeds the preset voltage range comparison threshold, the selection unit determines that the operation of the power transmission and transformation equipment is abnormal.

[0015] Further, the warning unit issues a warning signal when the selection unit determines that the operation of the power transmission and transformation equipment is abnormal.

[0016] Compared with the prior art, the monitoring module of the present invention acquires the images of power transmission and transformation lines, the electromagnetic wave signals near insulators, and the infrared images of insulators. The classification module divides the dynamic influence categories, and the selection unit selects the monitoring methods for power transmission and transformation equipment, including determining whether the operating state of power transmission and transformation equipment is abnormal based on the change in temperature distribution, or dividing the operating environment categories of power transmission and transformation equipment and adjusting the monitoring strategy, including calculating the dynamic characterization value according to the intensity and fitting value of the electromagnetic wave signal to determine whether the operating state of power transmission and transformation equipment is abnormal; or determining whether the operating state of power transmission and transformation equipment is abnormal according to the current and voltage of power transmission and transformation equipment. The present invention divides the operating environment of power transmission and transformation equipment and adopts different monitoring methods for the operating state of power transmission and transformation equipment, thereby improving the reliability of monitoring the operating state of power transmission and transformation equipment.

[0017] In particular, the classification module of the present invention identifies the swing amplitude of the power transmission and transformation line according to the image of the power transmission and transformation line, and divides the dynamic influence categories of the power transmission and transformation line. The increase in wind speed will increase the pollution and mechanical stress on the surface of the insulator, thereby affecting the insulation performance and durability of the insulator, and thus may affect the safe and reliable operation of the power transmission and transformation line. Identifying the swing amplitude of the power transmission and transformation line can characterize the wind speed to a certain extent, so as to divide the dynamic influence categories of the power transmission and transformation line and improve the reliability of monitoring the operating state of power transmission and transformation equipment.

[0018] In particular, the selection unit of the present invention continuously acquires the infrared image of the insulator and determines whether the operating state of the power transmission and transformation equipment is abnormal based on the change in temperature distribution. When there is pollution on the surface of the insulator or the insulator has mechanical damage or rupture, the insulator will have local temperature abnormality or overall temperature abnormality. By performing infrared monitoring on the insulator, it is possible to judge whether the insulator is operating normally, and thus judge the operating state of the power transmission and transformation equipment, improving the reliability of monitoring the operating state of power transmission and transformation equipment.

[0019] In particular, the present invention divides the operating environment categories of power transmission and transformation equipment according to the ambient temperature. In a high-temperature environment, the metal materials in the transmission line are prone to fatigue and stress deformation, which may lead to a decline in the mechanical properties of the materials and increase the risk of equipment damage. In a low-temperature environment, the water vapor or rain in the air will condense into ice on the power transmission and transformation line due to the low temperature, which may cause the surface of the insulator to freeze, affect its insulation performance, and increase the risk of partial discharge. At the same time, high-temperature and low-temperature environments will increase the difficulty of temperature regulation during the operation of power transmission and transformation equipment. By dividing the operating environment categories of power transmission and transformation equipment according to the ambient temperature, it is possible to select parameters that can better characterize the operating state of power transmission and transformation equipment, analyze the operating state of power transmission and transformation equipment, and improve the reliability of monitoring the operating state of power transmission and transformation equipment.

[0020] In particular, the selection unit of the present invention calculates a dynamic characterization value based on the intensity of the electromagnetic wave signal and the fitting value. When the insulator is abnormal, the intensity of the electromagnetic wave signal will change. By obtaining the intensity of the electromagnetic wave signal, the operating state of the power transmission and transformation line can be characterized. In high-temperature or low-temperature environments, at the same power of the power transmission and transformation equipment, the temperature of the power transmission and transformation equipment can be higher or lower than the normal operating temperature, and the temperature adjustment speed of the power transmission and transformation equipment may not be timely enough. By constructing the relationship curve between the operating temperature of the power transmission and transformation equipment and the power of the power transmission and transformation equipment and obtaining the fitting value with the historical sample curve, the operating state of the power transmission and transformation equipment can be characterized to a certain extent, thereby improving the reliability of monitoring the operating state of the power transmission and transformation equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 Structural diagram of the power transmission and transformation equipment operating state monitoring device according to an embodiment of the invention; Figure 2 Structural diagram of the host computer according to an embodiment of the invention; Figure 3 Logical decision diagram for classifying dynamic influence categories according to an embodiment of the invention; Figure 4 Logical decision diagram for determining whether the operating state of the power transmission and transformation equipment is abnormal according to the dynamic characterization value according to an embodiment of the invention. DETAILED DESCRIPTION OF THE INVENTION

[0022] In order to make the objectives and advantages of the present invention clearer, the present invention will be further described below in conjunction with embodiments; it should be understood that the specific embodiments described herein are only used to explain the present invention and are not used to limit the present invention.

[0023] The preferred embodiments of the present invention will be described below with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are only used to explain the technical principles of the present invention and do not limit the protection scope of the present invention.

[0024] In addition, it should be noted that in the description of the present invention, unless otherwise clearly defined and limited, the term "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific situations.

[0025] Please refer to Figures 1 - 4 as shown Figure 1 Structural diagram of the power transmission and transformation equipment operating state monitoring device according to an embodiment of the invention, Figure 2 Structural diagram of the host computer according to an embodiment of the invention, Figure 3It is a logical decision diagram for classifying dynamic impact categories of an invention embodiment. Figure 4 It is a logical decision diagram for determining whether the operation state of a power transmission and transformation device is abnormal according to dynamic characterization values in an invention embodiment. The operation state monitoring device of the power transmission and transformation device of the present invention includes: A monitoring module, including an image acquisition unit for acquiring images of power transmission lines, a radio monitoring unit for acquiring electromagnetic wave signals near insulators, and an infrared monitoring unit for acquiring infrared images of insulators; A classification module, connected to the monitoring module, for identifying the swing amplitude of the power transmission line according to the power transmission line image to classify the dynamic impact category of the power transmission line; A host computer, respectively connected to the monitoring module and the classification module, including a selection unit and an early warning unit, The selection unit is used to select the monitoring method for the power transmission and transformation device according to the dynamic impact category, including: Continuously acquire infrared images of insulators and determine whether the operation state of the power transmission and transformation device is abnormal based on the change in temperature distribution; Or, classify the operation environment category of the power transmission and transformation device according to the environmental temperature, including an extreme environment category and a non-extreme environment category, and adjust the monitoring strategy according to the operation environment category of the power transmission and transformation device, including: Acquire the electromagnetic wave signal near the insulator in the extreme environment category, construct the relationship curve between the operating temperature and power of the power transmission and transformation device to obtain the fitting value with the historical sample curve, calculate the dynamic characterization value according to the intensity of the electromagnetic wave signal and the fitting value, and determine whether the operation state of the power transmission and transformation device is abnormal; Or, monitor the current and voltage of the power transmission and transformation device in real time in the non-extreme environment category to determine whether the operation state of the power transmission and transformation device is abnormal; The early warning unit is used to issue an early warning signal according to the determination result of the selection unit.

[0026] Specifically, the present invention does not limit the specific structure of the monitoring module. The image acquisition unit can be an industrial CCD camera, which can acquire images of power transmission lines. The radio monitoring unit can be a radio sensor, which can acquire radio signals. The infrared monitoring unit can be an infrared monitoring sensor. This is prior art and will not be elaborated further.

[0027] Specifically, the present invention does not limit the specific structures of the classification module and the host computer, which can both be composed of logical components or combinations of logical components. The logical components include field programmable processors, computers, or microprocessors in computers. This is prior art and will not be elaborated further.

[0028] Specifically, the classification module selects a number of points with equal spacing on the power transmission and transformation line in the power transmission and transformation line image, respectively obtains the distances between the corresponding points of the number of points and the number of points of the power transmission and transformation line in the pre-stored standard power transmission and transformation line image, and uses the average distance to represent the swing amplitude.

[0029] In this embodiment, the pre-stored standard power transmission and transformation line image is obtained by photographing when the wind speed is less than level 2. 10 points with equal spacing are selected on the power transmission and transformation line. Using image analysis software, optionally, the image analysis software is MATLAB, and the distances between the points on the power transmission and transformation line in the power transmission and transformation line image and the corresponding points on the power transmission and transformation line in the pre-stored standard power transmission and transformation line image are obtained in sequence.

[0030] In this embodiment, the historical sample curve is constructed according to the historical operation state of the power transmission and transformation equipment. A power transmission and transformation equipment operation temperature change curve that changes with the power of the power transmission and transformation equipment is constructed. When fitting, the historical sample curves with the same power change of the power transmission and transformation equipment in the historical sample curves are selected.

[0031] Specifically, the classification module compares the swing amplitude with a preset swing amplitude comparison threshold. If the swing amplitude is less than the preset swing amplitude comparison threshold, the dynamic influence category of the power transmission and transformation line is a weak dynamic influence category; If the swing amplitude is greater than or equal to the preset swing amplitude comparison threshold, the dynamic influence category of the power transmission and transformation line is a strong dynamic influence category.

[0032] In this embodiment, the preset swing amplitude comparison threshold L0 is measured in advance by experiments. When the wind speed is greater than level 5, the power transmission and transformation line image is obtained, and the average distance Le is calculated. Let L0 = a × Le, where 1 < a < 1.2, and a is the distance coefficient.

[0033] Specifically, the classification module of the present invention identifies the swing amplitude of the power transmission and transformation line according to the power transmission and transformation line image, divides the dynamic influence category of the power transmission and transformation line. The increase in wind speed will increase the pollution and mechanical stress on the surface of the insulator, which will in turn affect the insulation performance and durability of the insulator, and thus may affect the safe and reliable operation of the power transmission and transformation line. Identifying the swing amplitude of the power transmission and transformation line can characterize the wind speed to a certain extent, so as to divide the dynamic influence category of the power transmission and transformation line and improve the reliability of monitoring the operation state of the power transmission and transformation equipment.

[0034] Specifically, the selection unit selects the monitoring method for the power transmission and transformation equipment according to the dynamic influence category. If the dynamic influence category of the power transmission and transformation line is a weak dynamic influence category, the selection unit divides the operation environment category of the power transmission and transformation equipment according to the environmental temperature, and adjusts the monitoring strategy according to the operation environment category of the power transmission and transformation equipment. If the dynamic impact category of the power transmission and transformation line is a strong dynamic impact category, the selected unit continuously acquires infrared images of the insulators, and determines whether the operating state of the power transmission and transformation equipment is abnormal based on the change in temperature distribution.

[0035] Specifically, the selected unit acquires the maximum temperature difference and the maximum temperature value in the infrared image of the insulator, compares the maximum temperature difference with the preset temperature difference comparison threshold, and compares the maximum temperature value with the preset maximum temperature comparison threshold. If the maximum temperature difference is greater than the preset temperature difference comparison threshold, or the maximum temperature value is greater than the preset maximum temperature comparison threshold, the selected unit determines that the operating state of the power transmission and transformation equipment is abnormal.

[0036] In this embodiment, the chromaticity values of the infrared image are analyzed in advance, and the chromaticity values are corresponding to the temperature values.

[0037] In this embodiment, the preset temperature difference comparison threshold Tc0 and the preset maximum temperature comparison threshold Tm0 are measured in advance by experiments. Infrared images of the insulators during normal operation are acquired several times, and the average temperature difference Tce and the average maximum temperature Tme are calculated. Let Tc0 = b×Tce, 0.9 < b < 1.1, where b is the temperature difference coefficient, and let Tm0 = c×Tme, 0.9 < c < 1.1, where c is the temperature value coefficient.

[0038] Specifically, the selected unit of the present invention continuously acquires infrared images of the insulators, and determines whether the operating state of the power transmission and transformation equipment is abnormal based on the change in temperature distribution. When there is contamination on the surface of the insulator or the insulator has mechanical damage or rupture, local or overall temperature anomalies will occur in the insulator. By performing infrared monitoring on the insulator, it is possible to judge whether the insulator is operating normally, thereby judging the operating state of the power transmission and transformation equipment and improving the reliability of monitoring the operating state of the power transmission and transformation equipment.

[0039] Specifically, the selected unit compares the current ambient temperature with the preset first temperature comparison threshold and the preset second temperature comparison threshold. If the current ambient temperature is greater than the preset first temperature comparison threshold, or the current temperature is less than the preset second temperature comparison threshold, the selected unit classifies the operating environment category of the power transmission and transformation equipment as an extreme environment category. If the current ambient temperature is less than the preset first temperature comparison threshold and greater than the preset second temperature comparison threshold, the selected unit classifies the operating environment category of the power transmission and transformation equipment as a non-extreme environment category.

[0040] In this embodiment, the preset first temperature comparison threshold is selected in the range of [35°C, 40°C], and the preset second temperature comparison threshold is selected in the range of [-5°C, 0°C].

[0041] Specifically, the present invention divides the operating environment categories of power transmission and transformation equipment according to the ambient temperature. In a high-temperature environment, the metal materials in the transmission line are prone to fatigue and stress deformation, which may lead to a decline in the mechanical properties of the materials and increase the risk of equipment damage. In a low-temperature environment, water vapor or rain in the air will condense into ice on the power transmission and transformation lines due to the low temperature, which may cause icing on the surface of the insulators, affect their insulation performance, and increase the risk of partial discharge. At the same time, high-temperature and low-temperature environments will increase the difficulty of temperature regulation during the operation of power transmission and transformation equipment. By dividing the operating environment categories of power transmission and transformation equipment according to the ambient temperature, parameters that can better characterize the operating state of power transmission and transformation equipment can be selected to analyze the operating state of power transmission and transformation equipment and improve the reliability of monitoring the operating state of power transmission and transformation equipment.

[0042] Specifically, the selection unit calculates the dynamic characterization value according to formula (1). (1) In formula (1), D represents the dynamic characterization value, I represents the electromagnetic wave signal intensity, I0 represents the preset electromagnetic wave signal intensity threshold, Y0 represents the preset fitting value threshold, and Y represents the fitting value.

[0043] In this embodiment, I0 is measured in advance through experiments. The electromagnetic wave signal near the normally operating insulator is obtained, and its average electromagnetic wave signal intensity Ie is obtained. Let I0 = d×Ie, where 0.9 < d < 1.1, d is the electromagnetic wave signal intensity coefficient, Y0 is 1, and the range of the fitting value is 0 - 1, where 0 means completely different and 1 means completely the same.

[0044] Specifically, the selection unit of the present invention calculates the dynamic characterization value according to the intensity of the electromagnetic wave signal and the fitting value. When the insulator shows an abnormality, the intensity of the electromagnetic wave signal will change. By obtaining the intensity of the electromagnetic wave signal, the operating state of the power transmission and transformation line can be characterized. In a high-temperature or low-temperature environment, at the same power of the power transmission and transformation equipment, its temperature can be higher or lower than the normal operating temperature, and the temperature regulation speed of the power transmission and transformation equipment may not be timely enough. By constructing the relationship curve between the operating temperature of the power transmission and transformation equipment and the power of the power transmission and transformation equipment and obtaining the fitting value with the historical sample curve, the operating state of the power transmission and transformation equipment can be characterized to a certain extent, thereby improving the reliability of monitoring the operating state of the power transmission and transformation equipment.

[0045] Specifically, the selection unit compares the dynamic characterization value with the preset dynamic characterization value comparison threshold. If the dynamic characterization value is greater than the preset dynamic characterization value comparison threshold, the selection unit determines that the operating state of the power transmission and transformation equipment has an abnormality.

[0046] In this embodiment, the preset dynamic characterization value comparison threshold is selected within the range of [0.15, 0.25].

[0047] Specifically, the selected unit compares the current of the power transmission and transformation equipment with the comparison threshold of the preset current range, and compares the voltage of the power transmission and transformation equipment with the comparison threshold of the preset voltage range. If the current of the power transmission and transformation equipment exceeds the comparison threshold of the preset current range, or if the voltage of the power transmission and transformation equipment exceeds the comparison threshold of the preset voltage range, the selected unit determines that the operation of the power transmission and transformation equipment is abnormal.

[0048] In this embodiment, the power transmission and transformation equipment operating normally is continuously monitored to obtain the current value and voltage value during the operation of the power transmission and transformation equipment, and the maximum current value Iam and the minimum current value Ial, the maximum voltage value Vam and the minimum voltage value Val are screened. The comparison threshold of the preset current range is [Ial, Iam], and the comparison threshold of the preset voltage range is [Val, Vam].

[0049] Specifically, the warning unit issues a warning signal when the selected unit determines that the operation of the power transmission and transformation equipment is abnormal.

[0050] In this embodiment, the specific manner of the warning signal is not limited and may be a voice warning signal.

[0051] So far, the technical solution of the present invention has been described in conjunction with the preferred embodiments shown in the drawings. However, it is easy for those skilled in the art to understand that the protection scope of the present invention is obviously not limited to these specific embodiments. Without departing from the principle of the present invention, those skilled in the art can make equivalent changes or substitutions to the relevant technical features, and the technical solutions after these changes or substitutions will all fall within the protection scope of the present invention.

Claims

1. A device for monitoring the operating status of power transmission and transformation equipment, characterized in that: include: The monitoring module includes an image acquisition unit for acquiring images of the power transmission and transformation line, a radio monitoring unit for acquiring electromagnetic wave signals near the insulator, and an infrared monitoring unit for acquiring infrared images of the insulator; A classification module, connected to the monitoring module, for identifying the swing amplitude of the power transmission and transformation line according to the power transmission and transformation line image, so as to classify the dynamic impact category of the power transmission and transformation line; A host computer, which is connected to the monitoring module and the classification module respectively, includes a selection unit and an early warning unit, The selection unit is used to select a monitoring method for the power transmission and transformation equipment according to the dynamic impact category, including: Continuously obtain infrared images of insulators and determine whether the operating status of power transmission and transformation equipment is abnormal based on changes in temperature distribution; Or, divide the operating environment categories of power transmission and transformation equipment according to the ambient temperature, including extreme environment categories and non-extreme environment categories, and adjust the monitoring strategy according to the operating environment categories of power transmission and transformation equipment, including: Obtain electromagnetic wave signals near insulators in extreme environment categories, construct a relationship curve between the operating temperature of power transmission and transformation equipment and the power of power transmission and transformation equipment, obtain fitting values ​​with historical sample curves, calculate dynamic characterization values ​​based on the intensity of electromagnetic wave signals and fitting values, and determine whether the operating status of power transmission and transformation equipment is abnormal; Or, real-time monitoring of the current and voltage of power transmission and transformation equipment in non-extreme environments to determine whether the operating status of the power transmission and transformation equipment is abnormal; The early warning unit is used to issue an early warning signal according to the determination result of the selected unit.

2. The device for monitoring the operating status of power transmission and transformation equipment according to claim 1, characterized in that: The classification module selects several points with equal spacing on the power transmission line in the power transmission line image, obtains the distances between the several points and the several points of the power transmission line in the pre-stored standard power transmission line image, and uses the average distance to represent the swing amplitude.

3. The device for monitoring the operation status of power transmission and transformation equipment according to claim 2, characterized in that: The classification module compares the swing amplitude with a preset swing amplitude comparison threshold. If the swing amplitude is less than the preset swing amplitude comparison threshold, the dynamic impact category of the transmission and transformation line is a weak dynamic impact category; If the swing amplitude is greater than or equal to the preset swing amplitude comparison threshold, the dynamic impact category of the transmission and transformation line is a strong dynamic impact category.

4. The device for monitoring the operating status of power transmission and transformation equipment according to claim 3, characterized in that: The selection unit selects a monitoring method for the power transmission and transformation equipment according to the dynamic impact category, If the dynamic impact category of the power transmission and transformation line is a weak dynamic impact category, the selected unit is divided into the power transmission and transformation equipment operating environment category according to the ambient temperature, and the monitoring strategy is adjusted according to the power transmission and transformation equipment operating environment category; If the dynamic impact category of the power transmission and transformation line is a strong dynamic impact category, the selected unit continuously obtains infrared images of the insulators and determines whether the operating status of the power transmission and transformation equipment is abnormal based on the change in temperature distribution.

5. The device for monitoring the operation status of power transmission and transformation equipment according to claim 1, characterized in that: The selection unit obtains the maximum temperature difference and the maximum temperature in the infrared image of the insulator, compares the maximum temperature difference with a preset temperature difference comparison threshold, and compares the maximum temperature with a preset temperature maximum comparison threshold, If the maximum temperature difference is greater than a preset temperature difference comparison threshold, or the maximum temperature is greater than a preset maximum temperature comparison threshold, the selected unit determines that the operating state of the power transmission and transformation equipment is abnormal.

6. The device for monitoring the operating status of power transmission and transformation equipment according to claim 1, characterized in that: The selection unit compares the current ambient temperature with a preset first temperature comparison threshold and a preset second temperature comparison threshold, If the current ambient temperature is greater than a preset first temperature comparison threshold, or the current temperature is less than a preset second temperature comparison threshold, the selected unit classifies the operating environment of the power transmission and transformation equipment as an extreme environment category; If the current ambient temperature is less than a preset first temperature comparison threshold and greater than a preset second temperature comparison threshold, the selected unit classifies the operating environment category of the power transmission and transformation equipment as a non-extreme environment category.

7. The device for monitoring the operating status of power transmission and transformation equipment according to claim 1, characterized in that: The selected unit calculates the dynamic characterization value according to formula (1), （1） In formula (1), D represents the dynamic characterization value, I represents the electromagnetic wave signal strength, I0 represents the preset electromagnetic wave signal strength threshold, Y0 represents the preset fitting value threshold, and Y represents the fitting value.

8. The device for monitoring the operating status of power transmission and transformation equipment according to claim 7, characterized in that: The selection unit compares the dynamic characterization value with a preset dynamic characterization value comparison threshold, If the dynamic characterization value is greater than a preset dynamic characterization value comparison threshold, the selected unit determines that the operating state of the power transmission and transformation equipment is abnormal.

9. The device for monitoring the operation status of power transmission and transformation equipment according to claim 1, characterized in that: The selection unit compares the current of the power transmission and transformation equipment with a preset current range comparison threshold, and compares the voltage of the power transmission and transformation equipment with a preset voltage range comparison threshold, If the current of the power transmission and transformation equipment exceeds the preset current range comparison threshold, or if the voltage of the power transmission and transformation equipment exceeds the preset voltage range comparison threshold, the selected unit determines that the power transmission and transformation equipment is operating abnormally.

10. The device for monitoring the operation status of power transmission and transformation equipment according to claim 1, characterized in that: The early warning unit sends out an early warning signal when the selected unit determines that the power transmission and transformation equipment is operating abnormally.

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