A method and system for monitoring temperature in high-voltage switchgear

Abstract

This application discloses a method and system for monitoring the temperature of a high-voltage switchgear, comprising: acquiring temperature parameters of the high-voltage switchgear and comparing the temperature parameters with a set warning value; if the temperature parameters are higher than the set warning value, calculating the working environment safety factor, the structural safety factor of the internal area of ​​the high-voltage switchgear, and the operational safety factor during the operation of the high-voltage switchgear; comparing the working environment safety factor, the structural safety factor, and the operational safety factor with corresponding safety factor thresholds stored in a database to obtain comparison results, and determining the temperature hazard source of the high-voltage switchgear based on the comparison results. This application can quickly and accurately determine the cause of abnormal temperature in a high-voltage switchgear.

Description

Technical Field

[0001] This application relates to the field of temperature monitoring technology for power equipment, and in particular to a method and system for monitoring the temperature of high-voltage switchgear. Background Technology

[0002] With the rapid development and widespread adoption of smart grids, the demand for power equipment monitoring is increasing daily. High-voltage switchgear, as a key component of power equipment, plays a crucial role. Abnormal temperatures in high-voltage switchgear not only affect the reliability of the entire power system but also pose a serious threat to operational stability and safety. Therefore, temperature monitoring of high-voltage switchgear is of paramount importance.

[0003] Existing technologies typically rely on infrared images to monitor the status of power equipment. However, while traditional infrared image recognition technology can monitor abnormal temperatures in high-voltage switchgear, it cannot deeply analyze and diagnose the specific causes of these abnormal temperatures, thus failing to propose targeted solutions.

[0004] Application content

[0005] This application provides a method and system for monitoring the temperature of high-voltage switchgear, so as to quickly and accurately determine the cause of abnormal temperature in high-voltage switchgear.

[0006] Firstly, this application provides a method for monitoring the temperature of a high-voltage switchgear, including:

[0007] The temperature parameters of the high-voltage switchgear are obtained and compared with the set warning values;

[0008] If the temperature parameter is higher than the set warning value, then the working environment safety factor corresponding to the working environment of the high-voltage switchgear, the structural safety factor of the internal area of ​​the high-voltage switchgear, and the operating safety factor of the high-voltage switchgear during operation are calculated respectively.

[0009] The working environment safety factor, the structural safety factor, and the operational safety factor are compared with the corresponding safety factor thresholds stored in the database to obtain the comparison results, and the temperature hazard sources of the high-voltage switchgear are determined based on the comparison results.

[0010] This application embodiment compares the temperature parameters of the high-voltage switchgear with a set warning value to determine whether the high-voltage switchgear has an abnormal temperature, thus facilitating the subsequent determination of the cause of the abnormal temperature. By calculating the working environment safety factor corresponding to the working environment of the high-voltage switchgear, the structural safety factor of the internal area of ​​the high-voltage switchgear, and the operational safety factor during the operation of the high-voltage switchgear, the cause of the abnormal temperature can be quickly and accurately determined. By comparing the working environment safety factor, the structural safety factor, and the operational safety factor with the corresponding safety factor thresholds stored in the database, the temperature hazard source of the high-voltage switchgear can be accurately identified based on the comparison results, thus quickly and accurately determining the cause of the abnormal temperature.

[0011] Furthermore, the calculation of the working environment safety factor corresponding to the working environment of the high-voltage switchgear is specifically as follows:

[0012] The cold air outlet temperature of the cooling equipment in the plant where the high-voltage switchgear is located and the air outlet temperature of the plant at each detection time point are obtained, and the working efficiency evaluation coefficient of the cooling equipment in the plant where the high-voltage switchgear is located is obtained based on the cold air outlet temperature and the air outlet temperature.

[0013] The humidity of the high-voltage switchgear at each detection time point is obtained, and the humidity safety factor corresponding to the high-voltage switchgear is obtained based on the humidity and the safe humidity, wherein the safe humidity is stored in a database;

[0014] The dust concentration of the high-voltage switchgear at each detection time point is obtained, and the dust concentration safety factor corresponding to the high-voltage switchgear is obtained based on the dust concentration and the safe dust concentration, wherein the safe dust concentration is stored in a database;

[0015] Based on the work efficiency evaluation coefficient, the humidity safety factor, and the dust concentration safety factor, the working environment safety factor corresponding to the working environment of the high-voltage switchgear is obtained.

[0016] By considering the three factors affecting the heat dissipation of the high-voltage switchgear—the working efficiency of the external cooling equipment in the factory building, dust concentration, and humidity—the working environment safety factor of the high-voltage switchgear can be accurately obtained, facilitating subsequent identification of the specific cause of the abnormal working environment safety of the high-voltage switchgear.

[0017] Furthermore, the calculation of the structural safety factor of the internal area of ​​the high-voltage switchgear is specifically as follows:

[0018] The total volume of the high-voltage switchgear and the line volume in each sub-region inside the high-voltage switchgear are obtained respectively, and the line layout hazard factor corresponding to the high-voltage switchgear is obtained based on the total volume and the line volume.

[0019] The ultrasonic frequency of the high-voltage switchgear at each detection time point is obtained, and the partial discharge hazard coefficient corresponding to the high-voltage switchgear is obtained based on the ultrasonic frequency and the safe frequency; wherein, the safe frequency is stored in a database.

[0020] Based on the line layout hazard factor and the partial discharge hazard factor, the structural safety factor of the internal area of ​​the high-voltage switchgear is obtained.

[0021] By considering the density of internal wiring and partial discharge, two factors that affect the abnormal temperature in the internal area of ​​the high-voltage switchgear, the structural safety factor of the internal area of ​​the high-voltage switchgear can be accurately obtained, which facilitates subsequent confirmation of the specific cause of the structural safety abnormality of the high-voltage switchgear.

[0022] Furthermore, the calculation of the operating safety factor during the operation of the high-voltage switchgear specifically involves:

[0023] The operating current of the high-voltage switchgear at each detection time point is obtained, and the current overload hazard factor corresponding to the high-voltage switchgear is obtained based on the operating current and the safe current, wherein the safe current is stored in a database.

[0024] The operating temperature of each electronic component inside the high-voltage switchgear is obtained at each detection time point during operation, and the risk assessment coefficient of the electronic components in the high-voltage switchgear is obtained based on the operating temperature and the safe temperature, wherein the safe temperature is stored in a database.

[0025] Based on the current overload hazard coefficient and the electronic component risk assessment coefficient, the operational safety coefficient during the operation of the high-voltage switchgear is obtained.

[0026] By considering the two factors affecting temperature anomalies during the operation of high-voltage switchgear—current overload and electronic component risk—the operational safety factor of the high-voltage switchgear can be accurately obtained, facilitating subsequent identification of the specific cause of structural safety issues in the high-voltage switchgear.

[0027] Furthermore, the step of comparing the working environment safety factor, the structural safety factor, and the operational safety factor with the corresponding safety factor thresholds stored in the database to obtain comparison results, and determining the temperature hazard sources of the high-voltage switchgear based on the comparison results, specifically involves:

[0028] The working environment safety factor, the structural safety factor, and the operational safety factor are compared with the corresponding first safety factor thresholds stored in the database.

[0029] If any one of the working environment safety factor, the structural safety factor, and the operational safety factor is lower than the first safety factor threshold, then the element corresponding to the first safety factor is determined to be a first-level temperature hazard source of the high-voltage switchgear.

[0030] When the identified primary hazard source is the working environment corresponding to the working environment safety factor, the corresponding second safety factor in the working environment safety factor is compared with the corresponding second safety factor threshold stored in the database; if the second safety factor is lower than the second safety factor threshold, then the element corresponding to the second safety factor is determined to be a secondary temperature hazard source of the high-voltage switchgear.

[0031] When the identified primary hazard source is the structure corresponding to the structural safety factor or the operation corresponding to the operational safety factor, the corresponding third safety factor in the structural safety factor or the operational safety factor is compared with the corresponding third safety factor threshold stored in the database; if the third safety factor is higher than the third safety factor threshold, then the element corresponding to the third safety factor is determined to be a secondary temperature hazard source of the high-voltage switchgear.

[0032] By comparing the working environment safety factor, the structural safety factor, and the operational safety factor with the corresponding first safety factor threshold stored in the database, the primary temperature hazard source of the high-voltage switchgear can be accurately determined. Once the primary temperature hazard source is determined, the secondary temperature hazard source of the high-voltage switchgear can be further determined.

[0033] Secondly, this application provides a high-voltage switchgear temperature monitoring system, including: an acquisition module, a calculation module, and a comparison module;

[0034] The acquisition module is used to acquire the temperature parameters of the high-voltage switchgear and compare the temperature parameters with the set warning value;

[0035] The calculation module is used to calculate the working environment safety factor, the structural safety factor of the internal area of ​​the high-voltage switchgear, and the operating safety factor of the high-voltage switchgear during operation if the temperature parameter is higher than the set warning value.

[0036] The comparison module is used to compare the working environment safety factor, the structural safety factor, and the operational safety factor with the corresponding safety factor thresholds stored in the database to obtain comparison results, and to determine the temperature hazard sources of the high-voltage switchgear based on the comparison results.

[0037] This application embodiment compares the temperature parameters of the high-voltage switchgear with a set warning value to determine whether the high-voltage switchgear has an abnormal temperature, thus facilitating the subsequent determination of the cause of the abnormal temperature. By calculating the working environment safety factor corresponding to the working environment of the high-voltage switchgear, the structural safety factor of the internal area of ​​the high-voltage switchgear, and the operational safety factor during the operation of the high-voltage switchgear, the cause of the abnormal temperature can be quickly and accurately determined. By comparing the working environment safety factor, the structural safety factor, and the operational safety factor with the corresponding safety factor thresholds stored in the database, the temperature hazard source of the high-voltage switchgear can be accurately identified based on the comparison results, thus quickly and accurately determining the cause of the abnormal temperature.

[0038] Furthermore, the computing module includes: a first computing submodule;

[0039] The first calculation submodule is used to calculate the working environment safety factor corresponding to the working environment of the high-voltage switchgear; the first calculation submodule includes: a first calculation unit, a second calculation unit, a third calculation unit and a fourth calculation unit;

[0040] The first calculation unit is used to obtain the cold air outlet temperature of the cooling equipment in the plant where the high-voltage switchgear is located at each detection time point and the air outlet temperature of the plant at each detection time point, and to obtain the working efficiency evaluation coefficient of the cooling equipment in the plant where the high-voltage switchgear is located based on the cold air outlet temperature and the air outlet temperature.

[0041] The second calculation unit is used to obtain the humidity of the high-voltage switchgear at each detection time point, and to obtain the humidity safety factor corresponding to the high-voltage switchgear based on the humidity and the safe humidity, wherein the safe humidity is stored in a database;

[0042] The third calculation unit is used to obtain the dust concentration of the high-voltage switchgear at each detection time point, and to obtain the dust concentration safety factor corresponding to the high-voltage switchgear based on the dust concentration and the safe dust concentration, wherein the safe dust concentration is stored in the database.

[0043] The fourth calculation unit is used to obtain the working environment safety factor corresponding to the working environment of the high-voltage switchgear based on the working efficiency evaluation coefficient, the humidity safety factor and the dust concentration safety factor.

[0044] Furthermore, the calculation module also includes: a second calculation submodule;

[0045] The second calculation submodule is used to calculate the structural safety factor of the internal area of ​​the high-voltage switchgear; the second calculation submodule includes: a fifth calculation unit, a sixth calculation unit and a seventh calculation unit;

[0046] The fifth calculation unit is used to obtain the total volume of the high-voltage switchgear and the line volume in each sub-region inside the high-voltage switchgear, and to obtain the line layout hazard factor corresponding to the high-voltage switchgear based on the total volume and the line volume.

[0047] The sixth calculation unit is used to obtain the ultrasonic frequency of the high-voltage switchgear at each detection time point, and to obtain the partial discharge hazard coefficient corresponding to the high-voltage switchgear based on the ultrasonic frequency and the safe frequency; wherein, the safe frequency is stored in the database.

[0048] The seventh calculation unit is used to obtain the structural safety factor of the internal area of ​​the high-voltage switchgear based on the line layout hazard factor and the partial discharge hazard factor.

[0049] Furthermore, the calculation module also includes: a third calculation submodule;

[0050] The third calculation submodule is used to calculate the operating safety factor during the operation of the high-voltage switchgear; the third calculation submodule includes: an eighth calculation unit, a ninth calculation unit, and a tenth calculation unit;

[0051] The eighth calculation unit is used to obtain the operating current of the high-voltage switchgear at each detection time point, and to obtain the current overload hazard factor of the high-voltage switchgear based on the operating current and the safe current, wherein the safe current is stored in the database.

[0052] The ninth calculation unit is used to obtain the operating temperature of each electronic component inside the high-voltage switchgear at each detection time point during operation, and to obtain the risk assessment coefficient of the electronic components in the high-voltage switchgear based on the operating temperature and the safe temperature, wherein the safe temperature is stored in the database.

[0053] The tenth calculation unit is used to obtain the operating safety factor of the high-voltage switchgear during operation based on the current overload hazard factor and the electronic component risk assessment factor.

[0054] Furthermore, the comparison module includes: a first comparison submodule, a determination submodule, a second comparison submodule, and a third comparison submodule;

[0055] The first comparison submodule is used to compare the working environment safety factor, the structural safety factor, and the operational safety factor with the corresponding safety factor thresholds stored in the database, respectively.

[0056] The determining submodule is used to determine the element corresponding to the first safety factor as a first-level temperature hazard source of the high-voltage switchgear if any one of the first safety factor, the working environment safety factor, the structural safety factor, and the operating safety factor is lower than the first safety factor threshold.

[0057] The second comparison submodule is used to compare the second safety factor corresponding to the working environment safety factor with the corresponding second safety factor threshold stored in the database when the determined primary hazard source is the working environment corresponding to the working environment safety factor; if the second safety factor is lower than the second safety factor threshold, then the element corresponding to the second safety factor is determined to be the secondary temperature hazard source of the high-voltage switchgear.

[0058] The third comparison submodule is used to compare the third safety factor corresponding to the structural safety factor or the operating safety factor with the corresponding third safety factor threshold stored in the database when the determined primary hazard source is the structure corresponding to the structural safety factor or the operation corresponding to the operating safety factor. If the third safety factor is higher than the third safety factor threshold, then the element corresponding to the third safety factor is determined to be a secondary temperature hazard source of the high-voltage switchgear. Attached Figure Description

[0059] Figure 1 This is a flowchart illustrating an embodiment of a high-voltage switchgear temperature monitoring method provided in this application;

[0060] Figure 2 This is a schematic diagram of an embodiment of a high-voltage switchgear temperature monitoring system provided in this application. Detailed Implementation

[0061] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this application, and not all embodiments. Based on the embodiments of this application, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the scope of protection of this application.

[0062] It should be understood that the step numbers used in the text are for ease of description only and are not intended to limit the order in which the steps are performed.

[0063] It should be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0064] The terms “comprising” and “including” indicate the presence of the described feature, whole, step, operation, element and / or component, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

[0065] The term “and / or” refers to any combination of one or more of the associated listed items, as well as all possible combinations, and includes these combinations.

[0066] The development of smart grids has led to a growing demand for power equipment monitoring. High-voltage switchgear is a critical component of power equipment, and abnormal temperatures in it can threaten the reliability, stability, and security of the entire power system. Therefore, temperature monitoring of high-voltage switchgear is of paramount importance.

[0067] Currently, the condition monitoring of power equipment mainly relies on infrared images. However, while traditional infrared image recognition technology can detect abnormal temperatures in high-voltage switchgear, it cannot deeply analyze the causes to provide targeted solutions.

[0068] Example 1

[0069] Please refer to Figure 1 , Figure 1 This is a flowchart illustrating an embodiment of a high-voltage switchgear temperature monitoring method provided in this application, including steps S1 to S3;

[0070] Step S1: Obtain the temperature parameters of the high-voltage switchgear and compare the temperature parameters with the set warning value;

[0071] Understandably, the process involves: first, acquiring infrared images of the high-voltage switchgear; second, randomly selecting deployment points from the infrared images of the high-voltage switchgear and obtaining the chromaticity values ​​corresponding to each deployment point; third, obtaining the temperature values ​​corresponding to each deployment point based on the chromaticity value ranges corresponding to each temperature value stored in the database; and then averaging the temperature values ​​to obtain the temperature parameters of the high-voltage switchgear; finally, comparing the temperature parameters of the high-voltage switchgear with a set warning value. If the temperature parameters are higher than the set warning value, it indicates that the high-voltage switchgear has a temperature abnormality and requires safety monitoring; otherwise, safety monitoring is not required.

[0072] The formula for averaging temperature values ​​is as follows:

[0073]

[0074] In the formula, h is the temperature parameter of the high-voltage switchgear, p is the number of each installation point in the high-voltage switchgear, and T is the temperature parameter of the switchgear. c Let be the temperature values ​​at each installation point of the c-th high-voltage switchgear.

[0075] It should be noted that infrared images of high-voltage switchgear can be acquired using existing technologies, such as infrared cameras, and this application does not impose any restrictions on this.

[0076] It should be noted that in infrared images, different temperature regions will appear in different shades of color, and different colors will correspond to different chromaticity values. Generally speaking, the higher the temperature, the darker the color will appear.

[0077] It should be noted that the set warning values ​​for the high-voltage switchgear are stored in the database and can be determined based on the external temperature of the environment in which the high-voltage switchgear is currently located.

[0078] By acquiring infrared images of the high-voltage switchgear and obtaining the chromaticity values ​​corresponding to randomly selected deployment points, the corresponding temperature values ​​can be determined, and the temperature values ​​can be averaged to accurately obtain the temperature of the switchgear.

[0079] Step S2: If the temperature parameter is higher than the set warning value, calculate the working environment safety factor, the structural safety factor of the internal area of ​​the high-voltage switchgear, and the operating safety factor of the high-voltage switchgear during operation.

[0080] It is understandable that if the temperature parameter of the high-voltage switchgear is higher than the set warning value, it indicates that there is a temperature abnormality in the high-voltage switchgear and safety monitoring is required. Specifically, this includes step S21, calculating the working environment safety factor corresponding to the working environment of the high-voltage switchgear, step S22, calculating the structural safety factor of the internal area of ​​the high-voltage switchgear, and step S23, calculating the operating safety factor of the high-voltage switchgear during operation.

[0081] Step S21: Calculate the working environment safety factor corresponding to the working environment of the high-voltage switchgear, specifically as follows:

[0082] First, the cold air outlet temperature of the cooling equipment in the plant where the high-voltage switchgear is located and the air outlet temperature of the plant at each testing time point are obtained. Based on the cold air outlet temperature and the air outlet temperature, the working efficiency evaluation coefficient corresponding to the cooling equipment in the plant where the high-voltage switchgear is located is obtained. The temperature of the cold air inlet and the temperature of the air outlet can be obtained through temperature sensors. The temperature sensors can be installed at the cold air inlet of the cooling equipment in the plant where the high-voltage switchgear is located, the air outlet of the plant where the high-voltage switchgear is located, and multiple locations inside the high-voltage switchgear. This application does not limit the method of obtaining the temperature.

[0083] Among them, the work efficiency evaluation coefficient The calculation formula is:

[0084]

[0085] In the formula, Here, z represents the efficiency evaluation coefficient of the external cooling equipment for the high-voltage switchgear, z is the z-th detection time point (i.e., the number of detections), and a is the coefficient of performance. m denoted as , where is the outlet temperature of the air vent of the plant where the high-voltage switchgear is located at the m-th detection time point; denoted as a′, where is the cold air vent temperature of the external cooling equipment of the high-voltage switchgear; denoted as T, where is the time interval between two adjacent detection time points; and denoted as R′, where is the reference operating efficiency of the cooling equipment of the plant where the high-voltage switchgear is located.

[0086] It should be noted that the reference operating efficiency R′ of the cooling equipment in the plant where the high-voltage switchgear is located is generally constant. Based on the models of the cooling equipment in the plant where the high-voltage switchgear is located stored in the database, the reference air outlet temperature of the cooling equipment per unit volume in the plant can be selected. This reference temperature is then multiplied by the volume of the plant stored in the database to obtain the reference air outlet temperature a″ of the cooling equipment. Finally, the reference operating efficiency R′ of the cooling equipment in the plant can be calculated using the following formula: Where R′ is the reference operating efficiency of the cooling equipment in the plant where the high-voltage switchgear is located, a″ is the reference temperature of the air outlet of the plant where the high-voltage switchgear is located, a′ is the temperature of the cold air outlet of the external cooling equipment of the high-voltage switchgear, and T is the time interval between two adjacent detection time points.

[0087] Secondly, the humidity of the high-voltage switchgear at each detection time point is obtained through a humidity sensor, and a humidity safety factor corresponding to the high-voltage switchgear is obtained based on the humidity and the safe humidity. The safe humidity is stored in a database β. The formula for calculating the humidity safety factor β is as follows:

[0088]

[0089] In the formula, β is the humidity safety factor corresponding to the high-voltage switchgear, z is the z-th detection time point, i.e., the number of detections, and b m Let be the humidity corresponding to the m-th detection time point of the high-voltage switchgear, and b′ be the safe humidity stored in the database.

[0090] Next, the dust concentration of the high-voltage switchgear at each detection time point is obtained using a dust concentration detector, and a dust concentration safety factor corresponding to the high-voltage switchgear is obtained based on the dust concentration and the safe dust concentration, wherein the safe dust concentration is stored in a database γ; and the calculation formula for the dust concentration safety factor γ is:

[0091]

[0092] In the formula, γ is the dust concentration safety factor corresponding to the high-voltage switchgear, z is the z-th detection time point, i.e., the number of detections, and c m Let c be the dust concentration at the m-th detection time point of the high-voltage switchgear, and c′ be the safe dust concentration stored in the database.

[0093] Finally, based on the aforementioned work efficiency evaluation coefficient The humidity safety factor β and the dust concentration safety factor γ are used to obtain the working environment safety factor τ corresponding to the working environment of the high-voltage switchgear. The formula for calculating the working environment safety factor τ is as follows:

[0094]

[0095] In the formula, τ is the safety factor of the working environment corresponding to the high-voltage switchgear. γ is the efficiency evaluation coefficient of the external cooling equipment of the high-voltage switchgear, and γ is the dust concentration safety factor corresponding to the high-voltage switchgear.

[0096] By considering the three factors affecting the heat dissipation of the high-voltage switchgear—the working efficiency of the external cooling equipment in the factory building, dust concentration, and humidity—the working environment safety factor of the high-voltage switchgear can be accurately obtained, facilitating subsequent identification of the specific cause of the abnormal working environment safety of the high-voltage switchgear.

[0097] Step S22: Calculate the structural safety factor of the internal area of ​​the high-voltage switchgear;

[0098] First, using the built-in camera of the high-voltage switchgear, three-dimensional images of each sub-region inside the switchgear are acquired. Based on these three-dimensional images, the total volume of the high-voltage switchgear and the wiring volume in each sub-region are obtained. Then, based on the total volume and the wiring volume, the wiring layout hazard factor corresponding to the high-voltage switchgear is calculated. The formula for calculating the wiring layout hazard factor θ is as follows:

[0099]

[0100] In the formula, θ is the hazard coefficient of the line layout corresponding to the high-voltage switchgear, y is the number of sub-regions inside the y-th high-voltage switchgear, i.e., the number of each sub-region, and V x V represents the volume of the wiring in each sub-region inside the high-voltage switchgear, and V represents the total volume of the high-voltage switchgear.

[0101] Secondly, ultrasonic frequencies of the high-voltage switchgear at various testing time points are obtained using ultrasonic detectors installed in multiple locations within the switchgear. Based on these ultrasonic frequencies and a safe frequency, a partial discharge hazard factor corresponding to the high-voltage switchgear is calculated. The safe frequency is stored in a database. The partial discharge hazard factor... The calculation formula is:

[0102]

[0103] In the formula, E represents the partial discharge hazard factor corresponding to the high-voltage switchgear, z represents the z-th detection time point, i.e., the number of detections, and E m Let E' be the ultrasonic frequency corresponding to the m-th detection time point of the high-voltage switchgear, and E′ be the safe frequency stored in the database.

[0104] Finally, based on the aforementioned line layout hazard factor θ and the aforementioned partial discharge hazard factor... The structural safety factor σ of the internal area of ​​the high-voltage switchgear is obtained.

[0105]

[0106] In the formula, σ is the structural safety factor corresponding to the high-voltage switchgear, and θ is the line layout hazard factor corresponding to the high-voltage switchgear. This represents the partial discharge hazard factor corresponding to the high-voltage switchgear.

[0107] By considering the density of internal wiring and partial discharge, two factors that affect the abnormal temperature in the internal area of ​​the high-voltage switchgear, the structural safety factor of the internal area of ​​the high-voltage switchgear can be accurately obtained, which facilitates subsequent confirmation of the specific cause of the structural safety abnormality of the high-voltage switchgear.

[0108] Step S23: Calculate the operating safety factor of the high-voltage switchgear during operation.

[0109] First, the operating current of the high-voltage switchgear at each detection time point is obtained, and the current overload hazard factor corresponding to the high-voltage switchgear is obtained based on the operating current and the safe current. The safe current is stored in a database. The operating current of the high-voltage switchgear can be obtained through an ammeter. This application does not limit the method of obtaining the current.

[0110] The formula for calculating the current overload hazard factor δ is as follows:

[0111]

[0112] In the formula, δ is the overload hazard factor corresponding to the high-voltage switchgear, z is the z-th detection time point, i.e., the number of detections, and I m I' represents the operating current at the m-th detection time point of the high-voltage switchgear, and I' represents the safe current stored in the database.

[0113] Secondly, the operating temperature of each electronic component inside the high-voltage switchgear is obtained at each detection time point during operation; based on the operating temperature and the safe temperature, the temperature hazard coefficient ρ of each electronic component in the high-voltage switchgear is obtained. i When the temperature hazard factor ρ i If the temperature hazard coefficient of the high-voltage switchgear is higher than that stored in the database, it is determined to be an abnormal electronic component. The number of abnormal electronic components s′ in the high-voltage switchgear is determined by this method. Based on the number of abnormal electronic components s′ and the total number of electronic components s, the risk assessment coefficient η of the electronic components in the high-voltage switchgear is obtained; wherein, the safe temperature is stored in the database.

[0114] Wherein, the temperature hazard factor ρ i The calculation formula is:

[0115]

[0116] In the formula, ρ i Let T be the temperature hazard coefficient of the i-th electronic component in the high-voltage switchgear, z be the z-th detection time point (i.e., the number of detections), and T be the temperature hazard coefficient of the i-th electronic component in the high-voltage switchgear. im Let T be the operating temperature of the i-th electronic component in the high-voltage switchgear at the m-th detection time point. i Store the safe temperature of the i-th electronic component in the database.

[0117] The formula for calculating the risk assessment coefficient η of electronic components in high-voltage switchgear is as follows:

[0118]

[0119] In the formula, η is the risk assessment coefficient of electronic components in the high-voltage switchgear, s′ is the number of abnormal electronic components in the high-voltage switchgear, and s is the total number of electronic components in the high-voltage switchgear.

[0120] Finally, based on the current overload hazard factor δ and the electronic component risk assessment factor η, the operating safety factor μ during the operation of the high-voltage switchgear is obtained; wherein, the calculation formula for the operating safety factor μ is:

[0121]

[0122] In the formula, μ is the operating safety factor of the high-voltage switchgear during operation, δ is the overload hazard factor of the corresponding current of the high-voltage switchgear, and η is the risk assessment factor of the electronic components in the high-voltage switchgear.

[0123] By considering the two factors affecting temperature anomalies during the operation of high-voltage switchgear—current overload and electronic component risk—the operational safety factor of the high-voltage switchgear can be accurately obtained, facilitating subsequent identification of the specific cause of structural safety issues in the high-voltage switchgear.

[0124] Step S3: Compare the working environment safety factor, the structural safety factor, and the operational safety factor with the corresponding safety factor thresholds stored in the database to obtain the comparison results, and determine the temperature hazard sources of the high-voltage switchgear based on the comparison results.

[0125] It is understood that the working environment safety factor, the structural safety factor, and the operational safety factor are compared with the corresponding first safety factor thresholds stored in the database. If any one of the working environment safety factor, the structural safety factor, and the operational safety factor is lower than the first safety factor threshold, then the element corresponding to the first safety factor is determined to be a primary temperature hazard source of the high-voltage switchgear. For example, if the working environment safety factor is lower than the working environment safety factor threshold of the high-voltage switchgear stored in the database, then the primary temperature hazard source of the high-voltage switchgear is determined to be the working environment corresponding to the working environment safety factor; if the structural safety factor is lower than the structural safety factor threshold of the high-voltage switchgear stored in the database, then the primary temperature hazard source of the high-voltage switchgear is determined to be the structure corresponding to the structural safety factor; if the operational safety factor is lower than the operational safety factor threshold of the high-voltage switchgear stored in the database, then the primary temperature hazard source of the high-voltage switchgear is determined to be the operation corresponding to the operational safety factor.

[0126] Once the primary temperature hazard source is identified, further analysis can be performed to determine the secondary hazard source. When the identified primary hazard source corresponds to the working environment safety factor, the corresponding second safety factor in the working environment safety factor is compared with the corresponding second safety factor threshold stored in the database. If the second safety factor is lower than the second safety factor threshold, the element corresponding to the second safety factor is determined to be the secondary temperature hazard source of the high-voltage switchgear. The second safety factor includes the working efficiency evaluation factor, the humidity safety factor, and the dust concentration safety factor. For example, if the working efficiency evaluation factor of the cooling equipment is lower than the threshold for the working efficiency evaluation factor of the external cooling equipment of the high-voltage switchgear stored in the database, the secondary temperature hazard source of the high-voltage switchgear is determined to be the working efficiency of the cooling equipment corresponding to the working efficiency evaluation factor; if the humidity safety factor of the high-voltage switchgear is lower than the safe humidity threshold of the high-voltage switchgear stored in the database, the secondary temperature hazard source of the high-voltage switchgear is determined to be the humidity corresponding to the humidity safety factor; if the dust concentration safety factor of the high-voltage switchgear is lower than the safe dust concentration threshold of the high-voltage switchgear stored in the database, the secondary temperature hazard source of the high-voltage switchgear is located as the dust concentration corresponding to the dust concentration safety factor.

[0127] When the identified primary hazard source is the structure corresponding to the structural safety factor or the operation corresponding to the operational safety factor, the corresponding third safety factor in the structural safety factor or the operational safety factor is compared with the corresponding third safety factor threshold stored in the database. If the third safety factor is higher than the third safety factor threshold, then the element corresponding to the third safety factor is determined to be a secondary temperature hazard source of the high-voltage switchgear. For example, when the identified primary hazard source is the structure corresponding to the structural safety factor, if the line layout hazard factor of the high-voltage switchgear is higher than the line layout hazard factor threshold of the high-voltage switchgear stored in the database, then the secondary temperature hazard source of the high-voltage switchgear is located as the line layout corresponding to the line layout hazard factor; if the partial discharge hazard factor of the high-voltage switchgear is higher than the partial discharge hazard factor threshold of the high-voltage switchgear stored in the database, then the secondary temperature hazard source of the high-voltage switchgear is located as the partial discharge corresponding to the partial discharge hazard factor. For example, when the identified primary hazard source is the operating safety factor, if the current overload hazard factor of the high-voltage switchgear is higher than the current overload hazard factor threshold of the high-voltage switchgear stored in the database, then the secondary temperature hazard source of the high-voltage switchgear is located as the current overload corresponding to the current overload hazard factor; if the electronic component risk assessment factor of the high-voltage switchgear is higher than the safety electronic component assessment factor threshold of the high-voltage switchgear stored in the database, then the secondary temperature hazard source of the high-voltage switchgear is located as the electronic component temperature abnormality corresponding to the electronic component risk assessment factor.

[0128] By comparing the working environment safety factor, the structural safety factor, and the operational safety factor with the corresponding first safety factor threshold stored in the database, the primary temperature hazard source of the high-voltage switchgear can be accurately determined. Once the primary temperature hazard source is determined, the secondary temperature hazard source of the high-voltage switchgear can be further determined.

[0129] This application embodiment compares the temperature parameters of the high-voltage switchgear with a set warning value to determine whether the high-voltage switchgear has an abnormal temperature, thus facilitating the subsequent determination of the cause of the abnormal temperature. By calculating the working environment safety factor corresponding to the working environment of the high-voltage switchgear, the structural safety factor of the internal area of ​​the high-voltage switchgear, and the operational safety factor during the operation of the high-voltage switchgear, the cause of the abnormal temperature can be quickly and accurately determined. By comparing the working environment safety factor, the structural safety factor, and the operational safety factor with the corresponding safety factor thresholds stored in the database, the temperature hazard source of the high-voltage switchgear can be accurately identified based on the comparison results, thus quickly and accurately determining the cause of the abnormal temperature.

[0130] Example 2

[0131] Please refer to Figure 2 , Figure 2 This is a schematic diagram of an embodiment of a high-voltage switchgear temperature monitoring system provided in this application, including an acquisition module 01, a calculation module 02, and a comparison module 03;

[0132] The acquisition module 01 is used to acquire the temperature parameters of the high-voltage switchgear and compare the temperature parameters with the set warning value;

[0133] Understandably, the process involves: first, acquiring infrared images of the high-voltage switchgear; second, randomly selecting deployment points from the infrared images of the high-voltage switchgear and obtaining the chromaticity values ​​corresponding to each deployment point; third, obtaining the temperature values ​​corresponding to each deployment point based on the chromaticity value ranges corresponding to each temperature value stored in the database; and then averaging the temperature values ​​to obtain the temperature parameters of the high-voltage switchgear; finally, comparing the temperature parameters of the high-voltage switchgear with a set warning value. If the temperature parameters are higher than the set warning value, it indicates that the high-voltage switchgear has a temperature abnormality and requires safety monitoring; otherwise, safety monitoring is not required.

[0134] The formula for averaging temperature values ​​is as follows:

[0135]

[0136] In the formula, h is the temperature parameter of the high-voltage switchgear, p is the number of each installation point in the high-voltage switchgear, and T is the temperature parameter of the switchgear. c Let be the temperature values ​​at each installation point of the c-th high-voltage switchgear.

[0137] It should be noted that infrared images of high-voltage switchgear can be acquired using existing technologies, such as infrared cameras, and this application does not impose any restrictions on this.

[0138] It should be noted that in infrared images, different temperature regions will appear in different shades of color, and different colors will correspond to different chromaticity values. Generally speaking, the higher the temperature, the darker the color will appear.

[0139] It should be noted that the set warning values ​​for the high-voltage switchgear are stored in the database and can be determined based on the external temperature of the environment in which the high-voltage switchgear is currently located.

[0140] The calculation module 02 is used to calculate the working environment safety factor, the structural safety factor of the internal area of ​​the high-voltage switchgear, and the operating safety factor of the high-voltage switchgear during operation if the temperature parameter is higher than the set warning value.

[0141] It is understandable that if the temperature parameter of the high-voltage switchgear is higher than the set warning value, it indicates that the high-voltage switchgear has a temperature abnormality and needs to be monitored for safety. Specifically, the calculation module 02 includes: a first calculation submodule; the first calculation submodule is used to calculate the working environment safety factor corresponding to the working environment of the high-voltage switchgear; the first calculation submodule includes: a first calculation unit, a second calculation unit, a third calculation unit, and a fourth calculation unit; the first calculation unit is used to obtain the cold air outlet temperature of the cooling equipment in the plant where the high-voltage switchgear is located at each detection time point and the air outlet temperature of the plant at each detection time point, and obtain the temperature of the plant where the high-voltage switchgear is located based on the cold air outlet temperature and the air outlet temperature. The system comprises the following components: a cooling equipment efficiency evaluation coefficient; a second calculation unit for obtaining the humidity of the high-voltage switchgear at each detection time point and obtaining a humidity safety factor for the high-voltage switchgear based on the humidity and a safe humidity, wherein the safe humidity is stored in a database; a third calculation unit for obtaining the dust concentration of the high-voltage switchgear at each detection time point and obtaining a dust concentration safety factor for the high-voltage switchgear based on the dust concentration and a safe dust concentration, wherein the safe dust concentration is stored in a database; and a fourth calculation unit for obtaining a working environment safety factor for the working environment of the high-voltage switchgear based on the efficiency evaluation coefficient, the humidity safety factor, and the dust concentration safety factor.

[0142] First, the cold air outlet temperature of the cooling equipment in the plant where the high-voltage switchgear is located and the air outlet temperature of the plant at each testing time point are obtained. Based on the cold air outlet temperature and the air outlet temperature, the working efficiency evaluation coefficient corresponding to the cooling equipment in the plant where the high-voltage switchgear is located is obtained. The temperature of the cold air inlet and the temperature of the air outlet can be obtained through temperature sensors. The temperature sensors can be installed at the cold air inlet of the cooling equipment in the plant where the high-voltage switchgear is located, the air outlet of the plant where the high-voltage switchgear is located, and multiple locations inside the high-voltage switchgear. This application does not limit the method of obtaining the temperature.

[0143] Among them, the work efficiency evaluation coefficient The calculation formula is:

[0144]

[0145] In the formula, Here, z represents the efficiency evaluation coefficient of the external cooling equipment for the high-voltage switchgear, z is the z-th detection time point (i.e., the number of detections), and a is the coefficient of performance. m denoted as , where is the outlet temperature of the air vent of the plant where the high-voltage switchgear is located at the m-th detection time point; denoted as a′, where is the cold air vent temperature of the external cooling equipment of the high-voltage switchgear; denoted as T, where is the time interval between two adjacent detection time points; and denoted as R′, where is the reference operating efficiency of the cooling equipment of the plant where the high-voltage switchgear is located.

[0146] It should be noted that the reference operating efficiency R′ of the cooling equipment in the plant where the high-voltage switchgear is located is generally constant. Based on the models of the cooling equipment in the plant where the high-voltage switchgear is located stored in the database, the reference air outlet temperature of the cooling equipment per unit volume in the plant can be selected. This reference temperature is then multiplied by the volume of the plant stored in the database to obtain the reference air outlet temperature a″ of the cooling equipment. Finally, the reference operating efficiency R′ of the cooling equipment in the plant can be calculated using the following formula: Where R′ is the reference operating efficiency of the cooling equipment in the plant where the high-voltage switchgear is located, a″ is the reference temperature of the air outlet of the plant where the high-voltage switchgear is located, a′ is the temperature of the cold air outlet of the external cooling equipment of the high-voltage switchgear, and T is the time interval between two adjacent detection time points.

[0147] Secondly, the humidity of the high-voltage switchgear at each detection time point is obtained through a humidity sensor, and a humidity safety factor corresponding to the high-voltage switchgear is obtained based on the humidity and the safe humidity. The safe humidity is stored in a database β. The formula for calculating the humidity safety factor β is as follows:

[0148]

[0149] In the formula, β is the humidity safety factor corresponding to the high-voltage switchgear, z is the z-th detection time point, i.e., the number of detections, and b m Let be the humidity corresponding to the m-th detection time point of the high-voltage switchgear, and b′ be the safe humidity stored in the database.

[0150] Next, the dust concentration of the high-voltage switchgear at each detection time point is obtained using a dust concentration detector, and a dust concentration safety factor corresponding to the high-voltage switchgear is obtained based on the dust concentration and the safe dust concentration, wherein the safe dust concentration is stored in a database γ; and the calculation formula for the dust concentration safety factor γ is:

[0151]

[0152] In the formula, γ is the dust concentration safety factor corresponding to the high-voltage switchgear, z is the z-th detection time point, i.e., the number of detections, and c m Let c be the dust concentration at the m-th detection time point of the high-voltage switchgear, and c′ be the safe dust concentration stored in the database.

[0153] Finally, based on the aforementioned work efficiency evaluation coefficient The humidity safety factor β and the dust concentration safety factor γ are used to obtain the working environment safety factor τ corresponding to the working environment of the high-voltage switchgear. The formula for calculating the working environment safety factor τ is as follows:

[0154]

[0155] In the formula, τ is the safety factor of the working environment corresponding to the high-voltage switchgear. γ is the efficiency evaluation coefficient of the external cooling equipment of the high-voltage switchgear, and γ is the dust concentration safety factor corresponding to the high-voltage switchgear.

[0156] By considering the three factors affecting the heat dissipation of the high-voltage switchgear—the working efficiency of the external cooling equipment in the factory building, dust concentration, and humidity—the working environment safety factor of the high-voltage switchgear can be accurately obtained, facilitating subsequent identification of the specific cause of the abnormal working environment safety of the high-voltage switchgear.

[0157] The calculation module 02 further includes: a second calculation submodule; the second calculation submodule is used to calculate the structural safety factor of the internal area of ​​the high-voltage switchgear; the second calculation submodule includes: a fifth calculation unit, a sixth calculation unit, and a seventh calculation unit; the fifth calculation unit is used to obtain the total volume of the high-voltage switchgear and the line volume in each sub-area inside the high-voltage switchgear, and obtain the line layout hazard factor corresponding to the high-voltage switchgear based on the total volume and the line volume; the sixth calculation unit is used to obtain the ultrasonic frequency of the high-voltage switchgear at each detection time point, and obtain the partial discharge hazard factor corresponding to the high-voltage switchgear based on the ultrasonic frequency and the safe frequency; wherein, the safe frequency is stored in a database; the seventh calculation unit is used to obtain the structural safety factor of the internal area of ​​the high-voltage switchgear based on the line layout hazard factor and the partial discharge hazard factor.

[0158] First, using the built-in camera of the high-voltage switchgear, three-dimensional images of each sub-region inside the switchgear are acquired. Based on these three-dimensional images, the total volume of the high-voltage switchgear and the wiring volume in each sub-region are obtained. Then, based on the total volume and the wiring volume, the wiring layout hazard factor corresponding to the high-voltage switchgear is calculated. The formula for calculating the wiring layout hazard factor θ is as follows:

[0159]

[0160] In the formula, θ is the hazard coefficient of the line layout corresponding to the high-voltage switchgear, y is the number of sub-regions inside the y-th high-voltage switchgear, i.e., the number of each sub-region, and V x V represents the volume of the wiring in each sub-region inside the high-voltage switchgear, and V represents the total volume of the high-voltage switchgear.

[0161] Secondly, ultrasonic frequencies of the high-voltage switchgear at various testing time points are obtained using ultrasonic detectors installed in multiple locations within the switchgear. Based on these ultrasonic frequencies and a safe frequency, a partial discharge hazard factor corresponding to the high-voltage switchgear is calculated. The safe frequency is stored in a database. The partial discharge hazard factor... The calculation formula is:

[0162]

[0163] In the formula, E represents the partial discharge hazard factor corresponding to the high-voltage switchgear, z represents the z-th detection time point, i.e., the number of detections, and E m Let E' be the ultrasonic frequency corresponding to the m-th detection time point of the high-voltage switchgear, and E′ be the safe frequency stored in the database.

[0164] Finally, based on the aforementioned line layout hazard factor θ and the aforementioned partial discharge hazard factor... The structural safety factor σ of the internal area of ​​the high-voltage switchgear is obtained.

[0165]

[0166] In the formula, σ is the structural safety factor corresponding to the high-voltage switchgear, and θ is the line layout hazard factor corresponding to the high-voltage switchgear. This represents the partial discharge hazard factor corresponding to the high-voltage switchgear.

[0167] By considering the density of internal wiring and partial discharge, two factors that affect the abnormal temperature in the internal area of ​​the high-voltage switchgear, the structural safety factor of the internal area of ​​the high-voltage switchgear can be accurately obtained, which facilitates subsequent confirmation of the specific cause of the structural safety abnormality of the high-voltage switchgear.

[0168] The calculation module 02 further includes: a third calculation submodule; the third calculation submodule is used to calculate the operating safety factor during the operation of the high-voltage switchgear; the third calculation submodule includes: an eighth calculation unit, a ninth calculation unit, and a tenth calculation unit; the eighth calculation unit is used to obtain the operating current of the high-voltage switchgear at each detection time point, and obtain the current overload hazard factor corresponding to the high-voltage switchgear based on the operating current and the safe current, wherein the safe current is stored in a database; the ninth calculation unit is used to obtain the operating temperature of each electronic component inside the high-voltage switchgear at each detection time point during operation, and obtain the risk assessment factor of the electronic component in the high-voltage switchgear based on the operating temperature and the safe temperature, wherein the safe temperature is stored in a database; the tenth calculation unit is used to obtain the operating safety factor during the operation of the high-voltage switchgear based on the current overload hazard factor and the electronic component risk assessment factor.

[0169] First, the operating current of the high-voltage switchgear at each detection time point is obtained, and the current overload hazard factor corresponding to the high-voltage switchgear is obtained based on the operating current and the safe current. The safe current is stored in a database. The operating current of the high-voltage switchgear can be obtained through an ammeter. This application does not limit the method of obtaining the current.

[0170] The formula for calculating the current overload hazard factor δ is as follows:

[0171]

[0172] In the formula, δ is the overload hazard factor corresponding to the high-voltage switchgear, z is the z-th detection time point, i.e., the number of detections, and I m I' represents the operating current at the m-th detection time point of the high-voltage switchgear, and I' represents the safe current stored in the database.

[0173] Secondly, the operating temperature of each electronic component inside the high-voltage switchgear is obtained at each detection time point during operation; based on the operating temperature and the safe temperature, the temperature hazard coefficient ρ of each electronic component in the high-voltage switchgear is obtained. i When the temperature hazard factor ρ i If the temperature hazard coefficient of the high-voltage switchgear is higher than that stored in the database, it is determined to be an abnormal electronic component. The number of abnormal electronic components s′ in the high-voltage switchgear is determined by this method. Based on the number of abnormal electronic components s′ and the total number of electronic components s, the risk assessment coefficient η of the electronic components in the high-voltage switchgear is obtained; wherein, the safe temperature is stored in the database.

[0174] Wherein, the temperature hazard factor ρ i The calculation formula is:

[0175]

[0176] In the formula, ρ i Let T be the temperature hazard coefficient of the i-th electronic component in the high-voltage switchgear, z be the z-th detection time point (i.e., the number of detections), and T be the temperature hazard coefficient of the i-th electronic component in the high-voltage switchgear. im Let T be the operating temperature of the i-th electronic component in the high-voltage switchgear at the m-th detection time point. i Store the safe temperature of the i-th electronic component in the database.

[0177] The formula for calculating the risk assessment coefficient η of electronic components in high-voltage switchgear is as follows:

[0178]

[0179] In the formula, η is the risk assessment coefficient of electronic components in the high-voltage switchgear, s′ is the number of abnormal electronic components in the high-voltage switchgear, and s is the total number of electronic components in the high-voltage switchgear.

[0180] Finally, based on the current overload hazard factor δ and the electronic component risk assessment factor η, the operating safety factor μ during the operation of the high-voltage switchgear is obtained; wherein, the calculation formula for the operating safety factor μ is:

[0181]

[0182] In the formula, μ is the operating safety factor of the high-voltage switchgear during operation, δ is the overload hazard factor of the corresponding current of the high-voltage switchgear, and η is the risk assessment factor of the electronic components in the high-voltage switchgear.

[0183] By considering the two factors affecting temperature anomalies during the operation of high-voltage switchgear—current overload and electronic component risk—the operational safety factor of the high-voltage switchgear can be accurately obtained, facilitating subsequent identification of the specific cause of structural safety issues in the high-voltage switchgear.

[0184] The comparison module 03 is used to compare the working environment safety factor, the structural safety factor, and the operational safety factor with the corresponding safety factor thresholds stored in the database, obtain the comparison results, and determine the temperature hazard sources of the high-voltage switchgear based on the comparison results.

[0185] Specifically, the comparison module 03 includes: a first comparison submodule, a determination submodule, a second comparison submodule, and a third comparison submodule; the first comparison submodule is used to compare the working environment safety factor, the structural safety factor, and the operational safety factor with the corresponding safety factor thresholds stored in the database; the determination submodule is used to determine that if any one of the working environment safety factor, the structural safety factor, and the operational safety factor is lower than the first safety factor threshold, the element corresponding to the first safety factor is a first-level temperature hazard source of the high-voltage switchgear; the second comparison submodule is used to, when the determined first-level hazard source is the working environment corresponding to the working environment safety factor, determine the working environment safety factor, the structural safety factor, and the operational safety factor, the element corresponding to the first safety factor is a first-level temperature hazard source of the high-voltage switchgear; The second safety factor corresponding to the environmental safety factor is compared with the corresponding second safety factor threshold stored in the database. If the second safety factor is lower than the second safety factor threshold, the element corresponding to the second safety factor is determined to be a secondary temperature hazard source of the high-voltage switchgear. The third comparison submodule is used to compare the third safety factor corresponding to the structural safety factor or the operating safety factor with the corresponding third safety factor threshold stored in the database when the determined primary hazard source is the structure corresponding to the structural safety factor or the operation corresponding to the operating safety factor. If the third safety factor is higher than the third safety factor threshold, the element corresponding to the third safety factor is determined to be a secondary temperature hazard source of the high-voltage switchgear.

[0186] It is understood that the working environment safety factor, the structural safety factor, and the operational safety factor are compared with the corresponding first safety factor thresholds stored in the database. If any one of the working environment safety factor, the structural safety factor, and the operational safety factor is lower than the first safety factor threshold, then the element corresponding to the first safety factor is determined to be a primary temperature hazard source of the high-voltage switchgear. For example, if the working environment safety factor is lower than the working environment safety factor threshold of the high-voltage switchgear stored in the database, then the primary temperature hazard source of the high-voltage switchgear is determined to be the working environment corresponding to the working environment safety factor; if the structural safety factor is lower than the structural safety factor threshold of the high-voltage switchgear stored in the database, then the primary temperature hazard source of the high-voltage switchgear is determined to be the structure corresponding to the structural safety factor; if the operational safety factor is lower than the operational safety factor threshold of the high-voltage switchgear stored in the database, then the primary temperature hazard source of the high-voltage switchgear is determined to be the operation corresponding to the operational safety factor.

[0187] Once the primary temperature hazard source is identified, further analysis can be performed to determine the secondary hazard source. When the identified primary hazard source corresponds to the working environment safety factor, the corresponding second safety factor in the working environment safety factor is compared with the corresponding second safety factor threshold stored in the database. If the second safety factor is lower than the second safety factor threshold, the element corresponding to the second safety factor is determined to be the secondary temperature hazard source of the high-voltage switchgear. The second safety factor includes the working efficiency evaluation factor, the humidity safety factor, and the dust concentration safety factor. For example, if the working efficiency evaluation factor of the cooling equipment is lower than the threshold for the working efficiency evaluation factor of the external cooling equipment of the high-voltage switchgear stored in the database, the secondary temperature hazard source of the high-voltage switchgear is determined to be the working efficiency of the cooling equipment corresponding to the working efficiency evaluation factor; if the humidity safety factor of the high-voltage switchgear is lower than the safe humidity threshold of the high-voltage switchgear stored in the database, the secondary temperature hazard source of the high-voltage switchgear is determined to be the humidity corresponding to the humidity safety factor; if the dust concentration safety factor of the high-voltage switchgear is lower than the safe dust concentration threshold of the high-voltage switchgear stored in the database, the secondary temperature hazard source of the high-voltage switchgear is located as the dust concentration corresponding to the dust concentration safety factor.

[0188] When the identified primary hazard source is the structure corresponding to the structural safety factor or the operation corresponding to the operational safety factor, the corresponding third safety factor in the structural safety factor or the operational safety factor is compared with the corresponding third safety factor threshold stored in the database. If the third safety factor is higher than the third safety factor threshold, then the element corresponding to the third safety factor is determined to be a secondary temperature hazard source of the high-voltage switchgear. For example, when the identified primary hazard source is the structure corresponding to the structural safety factor, if the line layout hazard factor of the high-voltage switchgear is higher than the line layout hazard factor threshold of the high-voltage switchgear stored in the database, then the secondary temperature hazard source of the high-voltage switchgear is located as the line layout corresponding to the line layout hazard factor; if the partial discharge hazard factor of the high-voltage switchgear is higher than the partial discharge hazard factor threshold of the high-voltage switchgear stored in the database, then the secondary temperature hazard source of the high-voltage switchgear is located as the partial discharge corresponding to the partial discharge hazard factor. For example, when the identified primary hazard source is the operating safety factor, if the current overload hazard factor of the high-voltage switchgear is higher than the current overload hazard factor threshold of the high-voltage switchgear stored in the database, then the secondary temperature hazard source of the high-voltage switchgear is located as the current overload corresponding to the current overload hazard factor; if the electronic component risk assessment factor of the high-voltage switchgear is higher than the safety electronic component assessment factor threshold of the high-voltage switchgear stored in the database, then the secondary temperature hazard source of the high-voltage switchgear is located as the electronic component temperature abnormality corresponding to the electronic component risk assessment factor.

[0189] By comparing the working environment safety factor, the structural safety factor, and the operational safety factor with the corresponding first safety factor threshold stored in the database, the primary temperature hazard source of the high-voltage switchgear can be accurately determined. Once the primary temperature hazard source is determined, the secondary temperature hazard source of the high-voltage switchgear can be further determined.

[0190] This application embodiment compares the temperature parameters of the high-voltage switchgear with a set warning value to determine whether the high-voltage switchgear has an abnormal temperature, thus facilitating the subsequent determination of the cause of the abnormal temperature. By calculating the working environment safety factor corresponding to the working environment of the high-voltage switchgear, the structural safety factor of the internal area of ​​the high-voltage switchgear, and the operational safety factor during the operation of the high-voltage switchgear, the cause of the abnormal temperature can be quickly and accurately determined. By comparing the working environment safety factor, the structural safety factor, and the operational safety factor with the corresponding safety factor thresholds stored in the database, the temperature hazard source of the high-voltage switchgear can be accurately identified based on the comparison results, thus quickly and accurately determining the cause of the abnormal temperature.

[0191] The specific embodiments described above further illustrate the purpose, technical solution, and beneficial effects of this application. It should be understood that the above descriptions are merely specific embodiments of this application and are not intended to limit the scope of protection of this application. In particular, it should be noted that any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the scope of protection of this application for those skilled in the art.

Claims

1. A method for monitoring the temperature of a high-voltage switchgear, characterized in that, include: The temperature parameters of the high-voltage switchgear are obtained and compared with the set warning values; If the temperature parameter is higher than the set warning value, then the working environment safety factor corresponding to the working environment of the high-voltage switchgear, the structural safety factor of the internal area of ​​the high-voltage switchgear, and the operating safety factor of the high-voltage switchgear during operation are calculated respectively. The working environment safety factor, the structural safety factor, and the operational safety factor are compared with the corresponding safety factor thresholds stored in the database to obtain the comparison results. Based on the comparison results, the temperature hazard sources of the high-voltage switchgear are determined. Specifically, the working environment safety factor, the structural safety factor, and the operational safety factor are compared with the corresponding first safety factor thresholds stored in the database. If any one of the working environment safety factor, the structural safety factor, and the operational safety factor is lower than the first safety factor threshold, then the element corresponding to the first safety factor is determined to be a first-level temperature hazard source of the high-voltage switchgear; when the determined first-level hazard source is the working environment corresponding to the working environment safety factor, the second safety factor corresponding to the working environment safety factor is compared with the corresponding second safety factor threshold stored in the database; If the second safety factor is lower than the second safety factor threshold, then the element corresponding to the second safety factor is determined to be a secondary temperature hazard source of the high-voltage switchgear; when the determined primary hazard source is the structure corresponding to the structural safety factor or the operation corresponding to the operational safety factor, the third safety factor corresponding to the structural safety factor or the operational safety factor is compared with the corresponding third safety factor threshold stored in the database. If the third safety factor is higher than the third safety factor threshold, then the element corresponding to the third safety factor is determined to be a secondary temperature hazard source of the high-voltage switchgear. The working environment safety factor is calculated based on the working efficiency assessment factor, humidity safety factor and dust concentration safety factor. The structural safety factor is calculated based on the line layout hazard factor and partial discharge hazard factor. The operation safety factor is calculated based on the current overload hazard factor and electronic component risk assessment factor.

2. The high-voltage switchgear temperature monitoring method according to claim 1, characterized in that, The calculation of the working environment safety factor corresponding to the working environment of the high-voltage switchgear is specifically as follows: The cold air outlet temperature of the cooling equipment in the plant where the high-voltage switchgear is located and the air outlet temperature of the plant at each detection time point are obtained, and the working efficiency evaluation coefficient of the cooling equipment in the plant where the high-voltage switchgear is located is obtained based on the cold air outlet temperature and the air outlet temperature. The humidity of the high-voltage switchgear at each detection time point is obtained, and the humidity safety factor corresponding to the high-voltage switchgear is obtained based on the humidity and the safe humidity, wherein the safe humidity is stored in a database; The dust concentration of the high-voltage switchgear at each detection time point is obtained, and the dust concentration safety factor corresponding to the high-voltage switchgear is obtained based on the dust concentration and the safe dust concentration, wherein the safe dust concentration is stored in a database; Based on the work efficiency evaluation coefficient, the humidity safety factor, and the dust concentration safety factor, the working environment safety factor corresponding to the working environment of the high-voltage switchgear is obtained.

3. The high-voltage switchgear temperature monitoring method according to claim 1, characterized in that, The calculation of the structural safety factor of the internal area of ​​the high-voltage switchgear is specifically as follows: The total volume of the high-voltage switchgear and the line volume in each sub-region inside the high-voltage switchgear are obtained respectively, and the line layout hazard factor corresponding to the high-voltage switchgear is obtained based on the total volume and the line volume. The ultrasonic frequency of the high-voltage switchgear at each detection time point is obtained, and the partial discharge hazard coefficient corresponding to the high-voltage switchgear is obtained based on the ultrasonic frequency and the safe frequency; wherein, the safe frequency is stored in a database. Based on the line layout hazard factor and the partial discharge hazard factor, the structural safety factor of the internal area of ​​the high-voltage switchgear is obtained.

4. The high-voltage switchgear temperature monitoring method according to claim 1, characterized in that, The calculation of the operating safety factor during the operation of the high-voltage switchgear is specifically as follows: The operating current of the high-voltage switchgear at each detection time point is obtained, and the current overload hazard factor corresponding to the high-voltage switchgear is obtained based on the operating current and the safe current, wherein the safe current is stored in a database. The operating temperature of each electronic component inside the high-voltage switchgear is obtained at each detection time point during operation, and the risk assessment coefficient of the electronic components in the high-voltage switchgear is obtained based on the operating temperature and the safe temperature, wherein the safe temperature is stored in a database. Based on the current overload hazard coefficient and the electronic component risk assessment coefficient, the operational safety coefficient during the operation of the high-voltage switchgear is obtained.

5. A high-voltage switchgear temperature monitoring system, characterized in that, include: Acquisition module, calculation module, comparison module; The acquisition module is used to acquire the temperature parameters of the high-voltage switchgear and compare the temperature parameters with the set warning value; The calculation module is used to calculate the working environment safety factor, the structural safety factor of the internal area of ​​the high-voltage switchgear, and the operating safety factor of the high-voltage switchgear during operation if the temperature parameter is higher than the set warning value. The comparison module is used to compare the working environment safety factor, the structural safety factor, and the operational safety factor with the corresponding safety factor thresholds stored in the database to obtain comparison results, and to determine the temperature hazard source of the high-voltage switchgear based on the comparison results. Specifically, the working environment safety factor, the structural safety factor, and the operational safety factor are compared with the corresponding first safety factor thresholds stored in the database. If any one of the working environment safety factor, the structural safety factor, and the operational safety factor is lower than the first safety factor threshold, then the element corresponding to the first safety factor is determined to be a first-level temperature hazard source of the high-voltage switchgear; when the determined first-level hazard source is the working environment corresponding to the working environment safety factor, the second safety factor corresponding to the working environment safety factor is compared with the corresponding second safety factor threshold stored in the database; If the second safety factor is lower than the second safety factor threshold, then the element corresponding to the second safety factor is determined to be a secondary temperature hazard source of the high-voltage switchgear; when the determined primary hazard source is the structure corresponding to the structural safety factor or the operation corresponding to the operational safety factor, the third safety factor corresponding to the structural safety factor or the operational safety factor is compared with the corresponding third safety factor threshold stored in the database. If the third safety factor is higher than the third safety factor threshold, then the element corresponding to the third safety factor is determined to be a secondary temperature hazard source of the high-voltage switchgear. The working environment safety factor is calculated based on the working efficiency assessment factor, humidity safety factor and dust concentration safety factor. The structural safety factor is calculated based on the line layout hazard factor and partial discharge hazard factor. The operation safety factor is calculated based on the current overload hazard factor and electronic component risk assessment factor.

6. The high-voltage switchgear temperature monitoring system according to claim 5, characterized in that, The computing module includes: a first computing submodule; The first calculation submodule is used to calculate the working environment safety factor corresponding to the working environment of the high-voltage switchgear; the first calculation submodule includes: a first calculation unit, a second calculation unit, a third calculation unit and a fourth calculation unit; The first calculation unit is used to obtain the cold air outlet temperature of the cooling equipment in the plant where the high-voltage switchgear is located at each detection time point and the air outlet temperature of the plant at each detection time point, and to obtain the working efficiency evaluation coefficient of the cooling equipment in the plant where the high-voltage switchgear is located based on the cold air outlet temperature and the air outlet temperature. The second calculation unit is used to obtain the humidity of the high-voltage switchgear at each detection time point, and to obtain the humidity safety factor corresponding to the high-voltage switchgear based on the humidity and the safe humidity, wherein the safe humidity is stored in a database; The third calculation unit is used to obtain the dust concentration of the high-voltage switchgear at each detection time point, and to obtain the dust concentration safety factor corresponding to the high-voltage switchgear based on the dust concentration and the safe dust concentration, wherein the safe dust concentration is stored in the database. The fourth calculation unit is used to obtain the working environment safety factor corresponding to the working environment of the high-voltage switchgear based on the working efficiency evaluation coefficient, the humidity safety factor and the dust concentration safety factor.

7. The high-voltage switchgear temperature monitoring system according to claim 5, characterized in that, The calculation module further includes: a second calculation submodule; The second calculation submodule is used to calculate the structural safety factor of the internal area of ​​the high-voltage switchgear; the second calculation submodule includes: a fifth calculation unit, a sixth calculation unit and a seventh calculation unit; The fifth calculation unit is used to obtain the total volume of the high-voltage switchgear and the line volume in each sub-region inside the high-voltage switchgear, and to obtain the line layout hazard factor corresponding to the high-voltage switchgear based on the total volume and the line volume. The sixth calculation unit is used to obtain the ultrasonic frequency of the high-voltage switchgear at each detection time point, and to obtain the partial discharge hazard coefficient corresponding to the high-voltage switchgear based on the ultrasonic frequency and the safe frequency; wherein, the safe frequency is stored in the database. The seventh calculation unit is used to obtain the structural safety factor of the internal area of ​​the high-voltage switchgear based on the line layout hazard factor and the partial discharge hazard factor.

8. The high-voltage switchgear temperature monitoring system according to claim 5, characterized in that, The calculation module further includes: a third calculation submodule; The third calculation submodule is used to calculate the operating safety factor during the operation of the high-voltage switchgear; the third calculation submodule includes: an eighth calculation unit, a ninth calculation unit, and a tenth calculation unit; The eighth calculation unit is used to obtain the operating current of the high-voltage switchgear at each detection time point, and to obtain the current overload hazard factor of the high-voltage switchgear based on the operating current and the safe current, wherein the safe current is stored in the database. The ninth calculation unit is used to obtain the operating temperature of each electronic component inside the high-voltage switchgear at each detection time point during operation, and to obtain the risk assessment coefficient of the electronic components in the high-voltage switchgear based on the operating temperature and the safe temperature, wherein the safe temperature is stored in the database. The tenth calculation unit is used to obtain the operating safety factor of the high-voltage switchgear during operation based on the current overload hazard factor and the electronic component risk assessment factor.

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