Method for determining internal temperature rise difference of GIS circuit breaker based on internal characteristic inversion and related device

Abstract

The invention relates to a method for determining the internal temperature rise difference of a GIS circuit breaker based on internal characteristic inversion and a related device. The method comprises the following steps: acquiring a plurality of historical shell temperature rise differences and a plurality of historical internal contact temperature rise differences of the GIS circuit breaker from a database; wherein each historical shell temperature rise difference corresponds to one historical internal contact temperature rise difference; fitting the plurality of historical shell temperature rise differences and the plurality of historical internal contact temperature rise differences to obtain an association relationship between the historical shell temperature rise differences and the historical internal contact temperature rise differences; obtaining a current shell temperature rise difference of the GIS circuit breaker from a database; and based on the current shell temperature rise difference and the association relationship, determining the current internal contact temperature rise difference of the GIS circuit breaker. By adopting the method, the internal temperature rise difference of the GIS circuit breaker can be quickly determined.

Description

Technical Field

[0001] The present application relates to the field of electric power technology, and in particular to a method and device for determining the internal temperature rise difference of a GIS circuit breaker based on internal characteristic inversion. Background Art

[0002] Gas Insulated Switchgear (GIS) circuit breakers are widely used in the safe and stable operation of power grids due to their small size, high reliability, strong current capacity, and intelligence. However, when the internal conductor of the GIS circuit breaker heats up due to poor contact and other reasons, it is easy to cause serious heating of the internal conductor of the GIS circuit breaker under load current due to its tight sealing and compact structure. The temperature rise is too high, which will accelerate the aging of the insulation material and cause a short circuit, which will lead to instability of the power system or over-tripping, causing large-scale power outages. Therefore, it is of great significance to measure the temperature of the internal conductor of the GIS circuit breaker and discover and eliminate internal defects and hidden dangers in advance.

[0003] Since the temperature rise of the internal conductor of the GIS circuit breaker cannot be measured directly, evaluating the temperature change inside the GIS circuit breaker through the shell temperature of the GIS circuit breaker is an important technical means to monitor and prevent defects and failures caused by excessive temperature inside the GIS circuit breaker. However, the factors that affect the mapping relationship between the temperature rise of the GIS circuit breaker shell and the temperature rise of the internal conductor are relatively complex, which leads to a slow speed in obtaining the internal temperature rise of the GIS circuit breaker through the shell temperature of the GIS circuit breaker.

[0004] Therefore, how to quickly determine the internal temperature rise difference of GIS circuit breaker has become an urgent problem to be solved. Summary of the invention

[0005] The embodiment of the present application provides a method and related device for determining the internal temperature rise difference of a GIS circuit breaker based on internal characteristic inversion, which can quickly determine the internal temperature rise difference of a GIS circuit breaker.

[0006] In a first aspect, an embodiment of the present application provides a method for determining the internal temperature rise difference of a GIS circuit breaker based on internal characteristic inversion, the method comprising:

[0007] Acquire multiple historical shell temperature rise differences and multiple historical internal contact temperature rise differences of the GIS circuit breaker from the database; wherein each historical shell temperature rise difference corresponds to a historical internal contact temperature rise difference;

[0008] Fitting a plurality of historical shell temperature rise differences and a plurality of historical internal contact temperature rise differences to obtain a correlation relationship between the historical shell temperature rise differences and the historical internal contact temperature rise differences;

[0009] Obtain the current shell temperature rise difference of the GIS circuit breaker from the database;

[0010] Based on the current shell temperature rise difference and the correlation relationship, the current internal contact temperature rise difference of the GIS circuit breaker is determined.

[0011] In one of the embodiments, the method also includes: determining the fault location of the GIS circuit breaker; adjusting the temperature rise value of the internal contacts of the fault location to a preset temperature, and determining the current value corresponding to the preset temperature as the current upper limit value; based on the current upper limit value, performing temperature rise tests on the internal contacts of the fault location and the outer casing of the GIS circuit breaker in a fault state to obtain multiple abnormal internal contact temperature rise values ​​and multiple abnormal outer casing temperature rise values; each abnormal internal contact temperature rise value refers to the temperature rise value of the internal contacts of the fault location; each abnormal outer casing temperature rise value refers to the outer casing temperature rise value of the GIS circuit breaker in the fault state; based on the multiple abnormal internal contact temperature rise values ​​and the multiple normal internal contact temperature rise values, determining multiple historical internal contact temperature rise differences, and storing the multiple historical internal contact temperature rise differences in a database; and, based on the multiple abnormal outer casing temperature rise values ​​and the multiple normal outer casing temperature rise values, determining multiple historical outer casing temperature rise differences, and storing the multiple historical outer casing temperature rise differences in a database.

[0012] In one of the embodiments, based on the upper limit value of the current flow, temperature rise tests are performed on the internal contacts of the faulty part and the casing of the GIS circuit breaker in the faulty state to obtain multiple abnormal internal contact temperature rise values ​​and multiple abnormal casing temperature rise values, including: determining multiple current flow values ​​that are less than or equal to the upper limit value of the current flow; for each current flow value, when it is determined that the internal contacts of the faulty part are passed through the current and the temperature rise value of the internal contacts is less than or equal to the preset temperature rise difference within a preset time period, obtaining the abnormal internal contact temperature rise value corresponding to the current flow value and the abnormal casing temperature rise value of the GIS circuit breaker in the faulty state.

[0013] In one of the embodiments, the method also includes: obtaining a current normal internal contact temperature rise value and a current abnormal internal contact temperature rise value of the GIS circuit breaker measured by a temperature inspection instrument; determining an actual internal contact temperature rise difference of the GIS circuit breaker based on the current normal internal contact temperature rise value and the current abnormal internal contact temperature rise value; determining an error between the actual internal contact temperature rise difference and the current internal contact temperature rise difference; and when the error is less than or equal to a preset error threshold, determining the current internal contact temperature rise difference as the final internal contact temperature rise difference of the GIS circuit breaker.

[0014] In one of the embodiments, the method also includes: obtaining a correspondence table between each internal contact temperature rise difference interval and the operating status of the GIS circuit breaker from a database; searching the correspondence table for the current operating status of the GIS circuit breaker corresponding to the interval to which the final internal contact temperature rise difference belongs; and outputting the current operating status of the GIS circuit breaker so that the user can determine the decision result for the GIS circuit breaker based on the current operating status of the GIS circuit breaker.

[0015] In one of the embodiments, the method also includes: determining the internal contact temperature rise difference corresponding to the upper limit value of the current; dividing the temperature rise difference of the historical internal contact temperature rise difference less than or equal to the internal contact temperature rise difference corresponding to the upper limit value of the current into multiple internal contact temperature rise difference intervals, and determining the operating state of the GIS circuit breaker corresponding to each internal contact temperature rise difference interval; generating a correspondence table between each internal contact temperature rise difference interval and the operating state of the GIS circuit breaker, and storing the correspondence table in a database.

[0016] In a second aspect, the present application provides a device for determining the internal temperature rise difference of a GIS circuit breaker based on internal characteristic inversion, the device comprising:

[0017] An acquisition module is used to acquire multiple historical shell temperature rise differences and multiple historical internal contact temperature rise differences of the GIS circuit breaker from a database; wherein each historical shell temperature rise difference corresponds to a historical internal contact temperature rise difference;

[0018] A processing module, used for fitting a plurality of historical shell temperature rise differences and a plurality of historical internal contact temperature rise differences to obtain a correlation relationship between the historical shell temperature rise differences and the historical internal contact temperature rise differences;

[0019] The acquisition module is also used to obtain the current shell temperature rise difference of the GIS circuit breaker from the database;

[0020] The determination module is used to determine the current internal contact temperature rise difference of the GIS circuit breaker based on the current shell temperature rise difference and the associated relationship.

[0021] In a third aspect, the present application provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0022] Acquire multiple historical shell temperature rise differences and multiple historical internal contact temperature rise differences of the GIS circuit breaker from the database; wherein each historical shell temperature rise difference corresponds to a historical internal contact temperature rise difference;

[0023] Fitting a plurality of historical shell temperature rise differences and a plurality of historical internal contact temperature rise differences to obtain a correlation relationship between the historical shell temperature rise differences and the historical internal contact temperature rise differences;

[0024] Obtain the current shell temperature rise difference of the GIS circuit breaker from the database;

[0025] Based on the current shell temperature rise difference and the correlation relationship, the current internal contact temperature rise difference of the GIS circuit breaker is determined.

[0026] In a fourth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the following steps are implemented:

[0027] Acquire multiple historical shell temperature rise differences and multiple historical internal contact temperature rise differences of the GIS circuit breaker from the database; wherein each historical shell temperature rise difference corresponds to a historical internal contact temperature rise difference;

[0028] Fitting a plurality of historical shell temperature rise differences and a plurality of historical internal contact temperature rise differences to obtain a correlation relationship between the historical shell temperature rise differences and the historical internal contact temperature rise differences;

[0029] Obtain the current shell temperature rise difference of the GIS circuit breaker from the database;

[0030] Based on the current shell temperature rise difference and the correlation relationship, the current internal contact temperature rise difference of the GIS circuit breaker is determined.

[0031] In a fifth aspect, the present application further provides a computer program product, including a computer program, which implements the following steps when executed by a processor:

[0032] Acquire multiple historical shell temperature rise differences and multiple historical internal contact temperature rise differences of the GIS circuit breaker from the database; wherein each historical shell temperature rise difference corresponds to a historical internal contact temperature rise difference;

[0033] Fitting a plurality of historical shell temperature rise differences and a plurality of historical internal contact temperature rise differences to obtain a correlation relationship between the historical shell temperature rise differences and the historical internal contact temperature rise differences;

[0034] Obtain the current shell temperature rise difference of the GIS circuit breaker from the database;

[0035] Based on the current shell temperature rise difference and the correlation relationship, the current internal contact temperature rise difference of the GIS circuit breaker is determined.

[0036] In the above method and related device for determining the internal temperature rise difference of GIS circuit breaker based on internal characteristic inversion, the computer device can obtain multiple historical shell temperature rise differences and multiple historical internal contact temperature rise differences of GIS circuit breaker from the database; wherein each historical shell temperature rise difference corresponds to a historical internal contact temperature rise difference; multiple historical shell temperature rise differences and multiple historical internal contact temperature rise differences are fitted to obtain the correlation between the historical shell temperature rise differences and the historical internal contact temperature rise differences; the current shell temperature rise difference of GIS circuit breaker is obtained from the database; based on the current shell temperature rise difference and the correlation, the current internal contact temperature rise difference of GIS circuit breaker is determined. By adopting this method, in the actual use of GIS circuit breaker, in the absence of simulation results, the computer device can determine the correlation between the historical shell temperature rise difference and the historical internal contact temperature rise difference based on multiple historical shell temperature rise differences and multiple historical internal contact temperature rise differences by means of internal characteristic inversion, so that when the current shell temperature rise difference is obtained, the internal contact temperature rise difference (or internal temperature rise difference) of GIS circuit breaker can be quickly determined based on the determined correlation. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 This is a schematic diagram of an application scenario of a method for determining the internal temperature rise difference of a GIS circuit breaker based on internal characteristic inversion provided in an embodiment of the present application;

[0039] Figure 2 It is a flow chart of a method for determining the internal temperature rise difference of a GIS circuit breaker based on internal characteristic inversion provided in an embodiment of the present application;

[0040] Figure 3 It is a flow chart of another method for determining the internal temperature rise difference of a GIS circuit breaker based on internal characteristic inversion provided in an embodiment of the present application;

[0041] Figure 4 This is a schematic diagram of a sample burial point provided in an embodiment of the present application;

[0042] Figure 5 This is a schematic diagram of the state of the main contact contact area provided in an embodiment of the present application;

[0043] Figure 6 It is a schematic diagram of the structure of a device for determining the internal temperature rise difference of a GIS circuit breaker based on internal characteristic inversion provided in an embodiment of the present application;

[0044] Figure 7 It is a structural diagram of a computer device provided in an embodiment of the present application. DETAILED DESCRIPTION

[0045] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0046] The following introduces the application scenario of the method for determining the internal temperature rise difference of a GIS circuit breaker based on internal characteristic inversion provided in an embodiment of the present application.

[0047] See also Figure 1 , Figure 1 Schematic diagram of an application scenario of a method for determining the internal temperature rise difference of a GIS circuit breaker based on internal characteristic inversion provided in an embodiment of the present application. Figure 1 As shown, the computer device 101 ( Figure 1 In the figure, the computer device 101 is drawn as an example of a terminal device) and a database server 102, wherein data can be transmitted between the computer device 101 and the database server 102 via a network.

[0048] The computer device 101 can obtain multiple historical shell temperature rise differences and multiple historical internal contact temperature rise differences of the GIS circuit breaker from the database server 102; wherein each historical shell temperature rise difference corresponds to a historical internal contact temperature rise difference; multiple historical shell temperature rise differences and multiple historical internal contact temperature rise differences are fitted to obtain the correlation between the historical shell temperature rise differences and the historical internal contact temperature rise differences; the current shell temperature rise difference of the GIS circuit breaker is obtained from the database; based on the current shell temperature rise difference and the correlation, the current internal contact temperature rise difference of the GIS circuit breaker is determined. Using this method, in the actual use of the GIS circuit breaker, in the absence of simulation results, the computer device can determine the correlation between the historical shell temperature rise difference and the historical internal contact temperature rise difference based on multiple historical shell temperature rise differences and multiple historical internal contact temperature rise differences by means of internal characteristic inversion, so that when the current shell temperature rise difference is obtained, the internal contact temperature rise difference of the GIS circuit breaker can be quickly determined based on the determined correlation.

[0049] Optionally, the computer device 101 may be a terminal device or a server. The terminal device mentioned here may include but is not limited to: a smart phone, a tablet computer, a laptop computer, a desktop computer, a smart watch, a smart TV, a smart car terminal, etc. The server mentioned here may be an independent physical server, or a server cluster or a distributed system composed of multiple physical servers.

[0050] See also Figure 2 , Figure 2 1 is a flow chart of a method for determining the internal temperature rise difference of a GIS circuit breaker based on internal characteristic inversion provided by an embodiment of the present application. The method can be executed by a computer device (for example, the above-mentioned computer device 201). Figure 2 As shown, the method for determining the internal temperature rise difference of the GIS circuit breaker based on internal characteristic inversion may include but is not limited to the following steps:

[0051] S201. Acquire multiple historical shell temperature rise differences and multiple historical internal contact temperature rise differences of the GIS circuit breaker from a database; wherein each historical shell temperature rise difference corresponds to a historical internal contact temperature rise difference.

[0052] In an optional embodiment, before step S201, the computer device may also determine the fault location of the GIS circuit breaker; adjust the temperature rise value of the internal contacts of the fault location to a preset temperature, and determine the current value corresponding to the preset temperature as the current upper limit value; based on the current upper limit value, perform temperature rise tests on the internal contacts of the fault location and the outer casing of the GIS circuit breaker in a fault state to obtain multiple abnormal internal contact temperature rise values ​​and multiple abnormal outer casing temperature rise values; each abnormal internal contact temperature rise value refers to the temperature rise value of the internal contacts of the fault location; each abnormal outer casing temperature rise value refers to the outer casing temperature rise value of the GIS circuit breaker in a fault state; based on the multiple abnormal internal contact temperature rise values ​​and the multiple normal internal contact temperature rise values, determine multiple historical internal contact temperature rise differences, and store the multiple historical internal contact temperature rise differences in a database; and, based on the multiple abnormal outer casing temperature rise values ​​and the multiple normal outer casing temperature rise values, determine multiple historical outer casing temperature rise differences, and store the multiple historical outer casing temperature rise differences in a database.

[0053] S202 , fitting a plurality of historical shell temperature rise differences and a plurality of historical internal contact temperature rise differences to obtain a correlation between the historical shell temperature rise differences and the historical internal contact temperature rise differences.

[0054] It can be understood that the correlation between the historical shell temperature rise difference and the historical internal contact temperature rise difference is a fitting function of the historical shell temperature rise difference and the historical internal contact temperature rise difference obtained by fitting.

[0055] In an optional embodiment, the computer device may utilize a target machine learning model to fit multiple historical shell temperature rise differences and multiple historical internal contact temperature rise differences to obtain a correlation between the historical shell temperature rise differences and the historical internal contact temperature rise differences.

[0056] S203. Obtain the current casing temperature rise difference of the GIS circuit breaker from the database.

[0057] In an optional embodiment, before step S203, the computer device may also obtain the normal temperature of the shell at the current moment and the abnormal temperature of the shell at the current moment measured by a temperature inspection meter or an infrared thermometer; determine the current shell temperature rise difference based on the normal temperature of the shell at the current moment and the abnormal temperature of the shell at the current moment; and store the current shell temperature rise difference in a database.

[0058] S204: Determine the current internal contact temperature rise difference of the GIS circuit breaker based on the current shell temperature rise difference and the correlation relationship.

[0059] In the embodiment of the present application, the computer device can obtain multiple historical shell temperature rise differences and multiple historical internal contact temperature rise differences of the GIS circuit breaker from the database; wherein each historical shell temperature rise difference corresponds to a historical internal contact temperature rise difference; multiple historical shell temperature rise differences and multiple historical internal contact temperature rise differences are fitted to obtain the correlation between the historical shell temperature rise differences and the historical internal contact temperature rise differences; the current shell temperature rise difference of the GIS circuit breaker is obtained from the database; based on the current shell temperature rise difference and the correlation, the current internal contact temperature rise difference of the GIS circuit breaker is determined. Using this method, in the actual use of the GIS circuit breaker, in the absence of simulation results, the computer device can determine the correlation between the historical shell temperature rise difference and the historical internal contact temperature rise difference based on multiple historical shell temperature rise differences and multiple historical internal contact temperature rise differences by means of internal characteristic inversion, so that when the current shell temperature rise difference is obtained, the internal contact temperature rise difference of the GIS circuit breaker can be quickly determined based on the determined correlation.

[0060] See also Figure 3 , Figure 3 1 is a flow chart of another method for determining the internal temperature rise difference of a GIS circuit breaker based on internal characteristic inversion provided by an embodiment of the present application. Figure 2 Compared with the method of determining the internal temperature rise difference of GIS circuit breaker based on internal characteristic inversion shown in Figure 3 The method also describes how the computer device determines a plurality of historical housing temperature rise differences and a plurality of historical internal contact temperature rise differences. Figure 3 As shown, the method for determining the internal temperature rise difference of the GIS circuit breaker based on internal characteristic inversion may include but is not limited to the following steps:

[0061] S301. Determine the fault location of the GIS circuit breaker.

[0062] For example, the schematic diagram of the GIS circuit breaker can be as follows: Figure 4 As shown, Figure 4 This is a schematic diagram of a sample burial point provided in an embodiment of the present application. Figure 4As shown in the figure, the test product is a single-phase 550kV gas-insulated metal-enclosed switchgear fast circuit breaker. Multiple thermocouples are set as sampling points at each measuring point, so that data can be collected without failure, and random instrument errors can be eliminated as much as possible. Figure 4 , counting from the left side of the mechanism, the three fracture main contacts are fracture 1, fracture 2 and fracture 3, among which the fracture area where the AA section is located (i.e. fracture 1) is the control group area (normal electrical contact area), and the fracture area where the BB section is located (i.e. fracture 3) is the test group area (abnormal electrical contact area).

[0063] For example, see Figure 5 , Figure 5 Schematic diagram of the main contact area state provided by an embodiment of the present application. Figure 5 As shown, the frame line is the contact area of ​​the main contact of the circuit breaker. For the fault fracture, all the contact fingers of the main contact are removed and only the arc contact is retained to simulate the abnormal contact resistance of the moving contact part.

[0064] S302, adjusting the internal contact temperature rise value of the fault location to a preset temperature, and determining the current value corresponding to the preset temperature as the current upper limit value.

[0065] Due to the existence of the fault fracture, the current capacity of the whole machine will be greatly reduced, so the current limit needs to be determined first through a preliminary test. The computer equipment adjusts the internal contact temperature rise value of the fault part to the preset temperature, and determines the current value corresponding to the preset temperature as the upper limit of the current. For example, the current value corresponding to the temperature rise value of the internal contact of the fault part reaches 75K and the temperature rise value is stabilized at 75K as the upper limit of the current.

[0066] For example, assuming that the temperature rise of the internal contacts at the fault location is about 75K, the corresponding current value is 1500A, then the computer device can determine that the upper limit of the current is 1500A.

[0067] S303. Based on the upper limit of the current flow, a temperature rise test is performed on the internal contacts of the faulty part and the casing of the GIS circuit breaker in the faulty state to obtain a plurality of abnormal internal contact temperature rise values ​​and a plurality of abnormal casing temperature rise values.

[0068] Among them, each abnormal internal contact temperature rise value refers to the temperature rise value of the internal contact at the fault location; each abnormal shell temperature rise value refers to the shell temperature rise value of the GIS circuit breaker under the fault state.

[0069] In an optional embodiment, the computer device performs a temperature rise test on the internal contacts of the faulty part and the casing of the GIS circuit breaker in a faulty state based on the upper limit value of the current flow, and obtains multiple abnormal internal contact temperature rise values ​​and multiple abnormal casing temperature rise values, which may include: determining multiple current flow values ​​that are less than or equal to the upper limit value of the current flow; for each current flow value, when it is determined that the internal contacts of the faulty part are passed through current and the temperature rise value of the internal contacts is less than or equal to a preset temperature rise difference within a preset time period, obtaining the abnormal internal contact temperature rise value corresponding to the current flow value and the abnormal casing temperature rise value of the GIS circuit breaker in the faulty state.

[0070] Optionally, the preset time period may be 1 hour, and the preset temperature rise difference may be 1K.

[0071] Optionally, the computer device may also obtain a normal internal contact temperature rise value corresponding to the through-current value and a normal casing temperature rise value of the GIS circuit breaker in a normal state.

[0072] S304. Based on multiple abnormal internal contact temperature rise values ​​and multiple normal internal contact temperature rise values, determine multiple historical internal contact temperature rise differences, and store the multiple historical internal contact temperature rise differences in a database; and, based on multiple abnormal outer shell temperature rise values ​​and multiple normal outer shell temperature rise values, determine multiple historical outer shell temperature rise differences, and store the multiple historical outer shell temperature rise differences in a database.

[0073] Exemplarily, the data stored in the database may be the data in Table 1 below.

[0074] Table 1 Temperature rise internal characteristic inversion test results table

[0075]

[0076] Assuming that the upper limit of the current is 1500A, it can be seen from Table 1 that the data corresponding to serial numbers 4 to 16 have current values ​​less than or equal to 1500A. Therefore, the computer device can determine multiple historical shell temperature rise differences and multiple historical internal contact temperature rise differences from the data corresponding to serial numbers 4 to 16.

[0077] S305. Acquire multiple historical shell temperature rise differences and multiple historical internal contact temperature rise differences of the GIS circuit breaker from the database; wherein each historical shell temperature rise difference corresponds to a historical internal contact temperature rise difference.

[0078] S306 , fitting a plurality of historical shell temperature rise differences and a plurality of historical internal contact temperature rise differences to obtain a correlation relationship between the historical shell temperature rise differences and the historical internal contact temperature rise differences.

[0079] In an optional embodiment, the computer device may utilize a target machine learning model to fit multiple historical shell temperature rise differences and multiple historical internal contact temperature rise differences to obtain a correlation between the historical shell temperature rise differences and the historical internal contact temperature rise differences.

[0080] In this implementation, the target machine learning model can be determined in the following manner: create an activation function f, and initialize the input weight parameter w and bias value b in f; use a stochastic gradient optimization method to optimize the parameters w and b in the machine learning model, and determine the loss function values ​​of the training samples and the verification samples; when the loss function value is less than a preset loss function threshold, obtain the machine learning model.

[0081] S307. Obtain the current casing temperature rise difference of the GIS circuit breaker from the database.

[0082] In an optional implementation, the relevant description of step S303 can refer to the description of the aforementioned step S203, which will not be repeated here.

[0083] S308. Determine the current internal contact temperature rise difference of the GIS circuit breaker based on the current shell temperature rise difference and the correlation relationship.

[0084] In the embodiment of the present application, the computer device can obtain multiple historical shell temperature rise differences and multiple historical internal contact temperature rise differences of the GIS circuit breaker from the database; wherein each historical shell temperature rise difference corresponds to a historical internal contact temperature rise difference; multiple historical shell temperature rise differences and multiple historical internal contact temperature rise differences are fitted to obtain the correlation between the historical shell temperature rise differences and the historical internal contact temperature rise differences; the current shell temperature rise difference of the GIS circuit breaker is obtained from the database; based on the current shell temperature rise difference and the correlation, the current internal contact temperature rise difference of the GIS circuit breaker is determined. Using this method, in the actual use of the GIS circuit breaker, in the absence of simulation results, the computer device can determine the correlation between the historical shell temperature rise difference and the historical internal contact temperature rise difference based on multiple historical shell temperature rise differences and multiple historical internal contact temperature rise differences by means of internal characteristic inversion, so that when the current shell temperature rise difference is obtained, the internal contact temperature rise difference of the GIS circuit breaker can be quickly determined based on the determined correlation.

[0085] In an optional embodiment, after step S304, the computer device may also determine the internal contact temperature rise difference corresponding to the upper limit value of the current; divide the temperature rise difference of the historical internal contact temperature rise difference less than or equal to the internal contact temperature rise difference corresponding to the upper limit value of the current into multiple internal contact temperature rise difference intervals, and determine the operating status of the GIS circuit breaker corresponding to each internal contact temperature rise difference interval; generate a correspondence table between each internal contact temperature rise difference interval and the operating status of the GIS circuit breaker, and store the correspondence table in a database.

[0086] Exemplarily, assuming that the upper limit of the current is 1500A, see Table 1, the internal contact temperature rise difference corresponding to the upper limit of the current 1500A is 64.18K, taking the integer 64K, the computer device can divide the internal contact temperature rise difference into the following 4 intervals: (0, 16], (16, 32], (32, 48] and (48, 64]. The computer device can also determine that the operating status of the GIS circuit breaker corresponding to (0, 16] is normal, the operating status of the GIS circuit breaker corresponding to (16, 32] is warning, the operating status of the GIS circuit breaker corresponding to (32, 48] is abnormal, and the operating status of the GIS circuit breaker corresponding to (48, 64] is serious. Afterwards, the computer device can generate a correspondence table between each internal contact temperature rise difference interval and the operating status of the GIS circuit breaker, and store the correspondence table in a database.

[0087] Optionally, the computer device may also interpolate three values ​​in each internal contact temperature rise difference interval, and combine with Table 1 to obtain the test result data shown in Table 2 below.

[0088] Table 2 Test results data

[0089]

[0090] It can be seen from Table 2 that the number of samples of the GIS circuit breaker operating status being normal (internal contact temperature rise difference interval is (0,16]) is 0; the number of sample data of the GIS circuit breaker operating status being attention (internal contact temperature rise difference interval is (16,32]) is 3, namely the data corresponding to sequence numbers 11 to 13; the number of sample data of the GIS circuit breaker operating status being abnormal (internal contact temperature rise difference interval is (32,48]) is 5, namely the data corresponding to sequence numbers 5 to 10; the number of sample data of the GIS circuit breaker operating status being abnormal (internal contact temperature rise difference interval is (48,64]) is 5, namely the data corresponding to sequence numbers 5 to 10.

[0091] The use of this implementation is conducive to subsequently determining the current operating state of the GIS circuit breaker based on the current internal contact temperature rise difference of the GIS circuit breaker.

[0092] In an optional implementation, after step S308, the computer device may also obtain the current normal internal contact temperature rise value and the current abnormal internal contact temperature rise value of the GIS circuit breaker measured by the temperature inspection instrument; determine the actual internal contact temperature rise difference of the GIS circuit breaker based on the current normal internal contact temperature rise value and the current abnormal internal contact temperature rise value; determine the error between the actual internal contact temperature rise difference and the current internal contact temperature rise difference; when the error is less than or equal to the preset error threshold, determine the current internal contact temperature rise difference as the final internal contact temperature rise difference of the GIS circuit breaker. In this way, by verifying the current internal contact temperature rise difference determined based on the current shell temperature rise difference and the association relationship, the accuracy of the current internal contact temperature rise difference of the determined GIS circuit breaker can be improved.

[0093] In this implementation, when the error is less than or equal to the preset error threshold, after the computer device determines that the current internal contact temperature rise difference is the final internal contact temperature rise difference of the GIS circuit breaker, it can also obtain the correspondence table between each internal contact temperature rise difference interval and the operating state of the GIS circuit breaker from the database; from the correspondence table, find the current operating state of the GIS circuit breaker corresponding to the interval to which the final internal contact temperature rise difference belongs; and output the current operating state of the GIS circuit breaker. In this way, the user can determine the decision result for the GIS circuit breaker based on the current operating state of the GIS circuit breaker.

[0094] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0095] Based on the same inventive concept, the embodiment of the present application also provides a device for determining the internal temperature rise difference of a GIS circuit breaker based on internal characteristic inversion for implementing the method for determining the internal temperature rise difference of a GIS circuit breaker based on internal characteristic inversion mentioned above. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above method, so the specific limitations of one or more embodiments of the device for determining the internal temperature rise difference of a GIS circuit breaker based on internal characteristic inversion provided below can be referred to the limitations of the method for determining the internal temperature rise difference of a GIS circuit breaker based on internal characteristic inversion above, and will not be repeated here.

[0096] See also Figure 6 , Figure 6 Schematic diagram of a device structure for determining the internal temperature rise difference of a GIS circuit breaker based on internal characteristic inversion provided in an embodiment of the present application. Figure 6 As shown, the device for determining the internal temperature rise difference of the GIS circuit breaker based on the internal characteristic inversion may include but is not limited to:

[0097] The acquisition module 601 is used to acquire multiple historical shell temperature rise differences and multiple historical internal contact temperature rise differences of the GIS circuit breaker from the database; wherein each historical shell temperature rise difference corresponds to a historical internal contact temperature rise difference;

[0098] Processing module 602, for fitting a plurality of historical shell temperature rise differences and a plurality of historical internal contact temperature rise differences, to obtain a correlation relationship between the historical shell temperature rise differences and the historical internal contact temperature rise differences;

[0099] The acquisition module 601 is also used to obtain the current shell temperature rise difference of the GIS circuit breaker from the database;

[0100] The determination module 603 is used to determine the current internal contact temperature rise difference of the GIS circuit breaker based on the current shell temperature rise difference and the association relationship.

[0101] In one embodiment, the determination module 603 is also used to determine the fault location of the GIS circuit breaker; the processing module 602 is also used to adjust the temperature rise value of the internal contacts of the fault location to a preset temperature, and determine the current value corresponding to the preset temperature as the current upper limit value; the processing module 602 is also used to perform temperature rise tests on the internal contacts of the fault location and the outer casing of the GIS circuit breaker in a fault state based on the current upper limit value, and obtain multiple abnormal internal contact temperature rise values ​​and multiple abnormal outer casing temperature rise values; each abnormal internal contact temperature rise value refers to the temperature rise value of the internal contacts of the fault location; each abnormal outer casing temperature rise value refers to the outer casing temperature rise value of the GIS circuit breaker in the fault state; the determination module 603 is also used to determine multiple historical internal contact temperature rise differences based on multiple abnormal internal contact temperature rise values ​​and multiple normal internal contact temperature rise values, and store the multiple historical internal contact temperature rise differences in a database; and, based on multiple abnormal outer casing temperature rise values ​​and multiple normal outer casing temperature rise values, determine multiple historical outer casing temperature rise differences, and store the multiple historical outer casing temperature rise differences in a database.

[0102] In one embodiment, the processing module 602 is used to perform temperature rise tests on the internal contacts of the faulty part and the casing of the GIS circuit breaker in a faulty state based on the upper limit value of the current flow, and obtain multiple abnormal internal contact temperature rise values ​​and multiple abnormal casing temperature rise values. It is specifically used to: determine multiple current flow values ​​that are less than or equal to the upper limit value of the current flow; for each current flow value, when it is determined that the internal contacts of the faulty part pass current and the temperature rise value of the internal contacts is less than or equal to a preset temperature rise difference within a preset time period, obtain the abnormal internal contact temperature rise value corresponding to the current flow value and the abnormal casing temperature rise value of the GIS circuit breaker in the faulty state.

[0103] In one embodiment, the acquisition module 601 is also used to obtain the current normal internal contact temperature rise value and the current abnormal internal contact temperature rise value of the GIS circuit breaker measured by the temperature patrol meter; the determination module 603 is also used to determine the actual internal contact temperature rise difference of the GIS circuit breaker based on the current normal internal contact temperature rise value and the current abnormal internal contact temperature rise value; the determination module 603 is also used to determine the error between the actual internal contact temperature rise difference and the current internal contact temperature rise difference; the determination module 603 is also used to determine the current internal contact temperature rise difference as the final internal contact temperature rise difference of the GIS circuit breaker when the error is less than or equal to a preset error threshold.

[0104] In one embodiment, the acquisition module 601 is also used to obtain a correspondence table between each internal contact temperature rise difference interval and the operating status of the GIS circuit breaker from a database; the processing module 602 is also used to find the current operating status of the GIS circuit breaker corresponding to the interval to which the final internal contact temperature rise difference belongs from the correspondence table; the processing module 602 is also used to output the current operating status of the GIS circuit breaker, so that the user can determine the decision result for the GIS circuit breaker based on the current operating status of the GIS circuit breaker.

[0105] In one embodiment, the device may further include a generation module. The determination module 603 is further used to determine the internal contact temperature rise difference corresponding to the upper limit value of the through-current; divide the temperature rise difference of the historical internal contact temperature rise difference less than or equal to the internal contact temperature rise difference corresponding to the upper limit value of the through-current into multiple internal contact temperature rise difference intervals, and determine the operating state of the GIS circuit breaker corresponding to each internal contact temperature rise difference interval; the generation module is used to generate a corresponding relationship table between each internal contact temperature rise difference interval and the operating state of the GIS circuit breaker, and store the corresponding relationship table in a database.

[0106] Each module in the above-mentioned device for determining the internal temperature rise difference of a GIS circuit breaker based on internal characteristic inversion can be implemented in whole or in part by software, hardware, or a combination thereof. Each of the above-mentioned modules can be embedded in or independent of a processor in a terminal device in the form of hardware, or can be stored in a memory in the terminal device in the form of software, so that the processor can call and execute the operations corresponding to each of the above modules.

[0107] In an exemplary embodiment, the present application provides a computer device, which may be a terminal, and its internal structure diagram may be as follows: Figure 7 As shown. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit and an input device. The processor, the memory and the input / output interface are connected through a system bus, and the communication interface, the display unit and the input device are connected to the system bus through the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner can be implemented through WIFI, a mobile cellular network, near field communication (NFC) or other technologies. When the computer program is executed by the processor, a method for determining the internal temperature rise difference of a GIS circuit breaker based on internal characteristic inversion is implemented.

[0108] Those skilled in the art will understand that Figure 7 The structure shown in the figure is only a block diagram of a part of the structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than those shown in the figure, or combine certain components, or have a different arrangement of components.

[0109] In an exemplary embodiment, the present application provides a computer device, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the following steps are implemented:

[0110] Acquire multiple historical shell temperature rise differences and multiple historical internal contact temperature rise differences of the GIS circuit breaker from the database; wherein each historical shell temperature rise difference corresponds to a historical internal contact temperature rise difference;

[0111] Fitting a plurality of historical shell temperature rise differences and a plurality of historical internal contact temperature rise differences to obtain a correlation relationship between the historical shell temperature rise differences and the historical internal contact temperature rise differences;

[0112] Obtain the current shell temperature rise difference of the GIS circuit breaker from the database;

[0113] Based on the current shell temperature rise difference and the correlation relationship, the current internal contact temperature rise difference of the GIS circuit breaker is determined.

[0114] In one embodiment, the processor executes the computer program to further implement the following steps: determining the fault location of the GIS circuit breaker; adjusting the temperature rise value of the internal contacts of the fault location to a preset temperature, and determining the current value corresponding to the preset temperature as the current upper limit value; based on the current upper limit value, performing temperature rise tests on the internal contacts of the fault location and the casing of the GIS circuit breaker in the fault state to obtain multiple abnormal internal contact temperature rise values ​​and multiple abnormal casing temperature rise values; each abnormal internal contact temperature rise value refers to the temperature rise value of the internal contacts of the fault location; each abnormal casing temperature rise value refers to the casing temperature rise value of the GIS circuit breaker in the fault state; based on the multiple abnormal internal contact temperature rise values ​​and the multiple normal internal contact temperature rise values, determining multiple historical internal contact temperature rise differences, and storing the multiple historical internal contact temperature rise differences in a database; and, based on the multiple abnormal casing temperature rise values ​​and the multiple normal casing temperature rise values, determining multiple historical casing temperature rise differences, and storing the multiple historical casing temperature rise differences in a database.

[0115] In one embodiment, the processor executes a computer program to implement a temperature rise test on the internal contacts of the fault part and the casing of the GIS circuit breaker in a fault state based on the upper limit value of the current flow, and when multiple abnormal internal contact temperature rise values ​​and multiple abnormal casing temperature rise values ​​are obtained, the following steps are specifically implemented: determine multiple current flow values ​​that are less than or equal to the upper limit value of the current flow; for each current flow value, when it is determined that the internal contacts of the fault part pass current and the temperature rise value of the internal contacts is less than or equal to a preset temperature rise difference within a preset time period, obtain the abnormal internal contact temperature rise value corresponding to the current flow value and the abnormal casing temperature rise value in the fault state of the GIS circuit breaker.

[0116] In one embodiment, the processor executes the computer program to further implement the following steps: obtain the current normal internal contact temperature rise value and the current abnormal internal contact temperature rise value of the GIS circuit breaker measured by the temperature patrol meter; determine the actual internal contact temperature rise difference of the GIS circuit breaker based on the current normal internal contact temperature rise value and the current abnormal internal contact temperature rise value; determine the error between the actual internal contact temperature rise difference and the current internal contact temperature rise difference; when the error is less than or equal to a preset error threshold, determine the current internal contact temperature rise difference as the final internal contact temperature rise difference of the GIS circuit breaker.

[0117] In one embodiment, the processor executes the computer program to further implement the following steps: obtaining a correspondence table between each internal contact temperature rise difference interval and the operating status of the GIS circuit breaker from a database; searching the correspondence table for the current operating status of the GIS circuit breaker corresponding to the interval to which the final internal contact temperature rise difference belongs; and outputting the current operating status of the GIS circuit breaker so that the user can determine the decision result for the GIS circuit breaker based on the current operating status of the GIS circuit breaker.

[0118] In one embodiment, the processor executes the computer program to further implement the following steps: determining the internal contact temperature rise difference corresponding to the upper limit value of the current; dividing the temperature rise difference of the historical internal contact temperature rise difference less than or equal to the internal contact temperature rise difference corresponding to the upper limit value of the current into multiple internal contact temperature rise difference intervals, and determining the operating state of the GIS circuit breaker corresponding to each internal contact temperature rise difference interval; generating a correspondence table between each internal contact temperature rise difference interval and the operating state of the GIS circuit breaker, and storing the correspondence table in a database.

[0119] In an exemplary embodiment, the present application provides a computer-readable storage medium having a computer program stored thereon, and when the computer program is executed by a processor, the following steps are implemented:

[0120] Acquire multiple historical shell temperature rise differences and multiple historical internal contact temperature rise differences of the GIS circuit breaker from the database; wherein each historical shell temperature rise difference corresponds to a historical internal contact temperature rise difference;

[0121] Fitting a plurality of historical shell temperature rise differences and a plurality of historical internal contact temperature rise differences to obtain a correlation relationship between the historical shell temperature rise differences and the historical internal contact temperature rise differences;

[0122] Obtain the current shell temperature rise difference of the GIS circuit breaker from the database;

[0123] Based on the current shell temperature rise difference and the correlation relationship, the current internal contact temperature rise difference of the GIS circuit breaker is determined.

[0124] In one embodiment, when the computer program is executed by the processor, the following steps are also implemented: determining the fault location of the GIS circuit breaker; adjusting the temperature rise value of the internal contacts of the fault location to a preset temperature, and determining the current value corresponding to the preset temperature as the current upper limit value; based on the current upper limit value, performing temperature rise tests on the internal contacts of the fault location and the outer casing of the GIS circuit breaker in the fault state, to obtain multiple abnormal internal contact temperature rise values ​​and multiple abnormal outer casing temperature rise values; each abnormal internal contact temperature rise value refers to the temperature rise value of the internal contacts of the fault location; each abnormal outer casing temperature rise value refers to the outer casing temperature rise value of the GIS circuit breaker in the fault state; based on the multiple abnormal internal contact temperature rise values ​​and the multiple normal internal contact temperature rise values, determining multiple historical internal contact temperature rise differences, and storing the multiple historical internal contact temperature rise differences in a database; and, based on the multiple abnormal outer casing temperature rise values ​​and the multiple normal outer casing temperature rise values, determining multiple historical outer casing temperature rise differences, and storing the multiple historical outer casing temperature rise differences in a database.

[0125] In one embodiment, a computer program is executed by a processor to implement a temperature rise test on the internal contacts of the faulty part and the casing of the GIS circuit breaker in a faulty state based on the upper limit value of the current flow, and when multiple abnormal internal contact temperature rise values ​​and multiple abnormal casing temperature rise values ​​are obtained, the following steps are specifically implemented: determining multiple current flow values ​​that are less than or equal to the upper limit value of the current flow; for each current flow value, when it is determined that the internal contacts of the faulty part pass current and the temperature rise value of the internal contacts is less than or equal to a preset temperature rise difference within a preset time period, obtaining the abnormal internal contact temperature rise value corresponding to the current flow value and the abnormal casing temperature rise value in the faulty state of the GIS circuit breaker.

[0126] In one embodiment, when the computer program is executed by the processor, the following steps are also implemented: obtaining the current normal internal contact temperature rise value and the current abnormal internal contact temperature rise value of the GIS circuit breaker measured by the temperature patrol meter; determining the actual internal contact temperature rise difference of the GIS circuit breaker based on the current normal internal contact temperature rise value and the current abnormal internal contact temperature rise value; determining the error between the actual internal contact temperature rise difference and the current internal contact temperature rise difference; when the error is less than or equal to a preset error threshold, determining the current internal contact temperature rise difference as the final internal contact temperature rise difference of the GIS circuit breaker.

[0127] In one embodiment, when the computer program is executed by the processor, the following steps are also implemented: obtaining a correspondence table between each internal contact temperature rise difference interval and the operating status of the GIS circuit breaker from a database; searching the correspondence table for the current operating status of the GIS circuit breaker corresponding to the interval to which the final internal contact temperature rise difference belongs; and outputting the current operating status of the GIS circuit breaker so that the user can determine the decision result for the GIS circuit breaker based on the current operating status of the GIS circuit breaker.

[0128] In one embodiment, when the computer program is executed by the processor, the following steps are also implemented: determining the internal contact temperature rise difference corresponding to the upper limit value of the current flow; dividing the temperature rise difference of the historical internal contact temperature rise difference less than or equal to the internal contact temperature rise difference corresponding to the upper limit value of the current flow into multiple internal contact temperature rise difference intervals, and determining the operating state of the GIS circuit breaker corresponding to each internal contact temperature rise difference interval; generating a correspondence table between each internal contact temperature rise difference interval and the operating state of the GIS circuit breaker, and storing the correspondence table in a database.

[0129] In an exemplary embodiment, the present application provides a computer program product, including a computer program, which implements the following steps when executed by a processor:

[0130] Acquire multiple historical shell temperature rise differences and multiple historical internal contact temperature rise differences of the GIS circuit breaker from the database; wherein each historical shell temperature rise difference corresponds to a historical internal contact temperature rise difference;

[0131] Fitting a plurality of historical shell temperature rise differences and a plurality of historical internal contact temperature rise differences to obtain a correlation relationship between the historical shell temperature rise differences and the historical internal contact temperature rise differences;

[0132] Obtain the current shell temperature rise difference of the GIS circuit breaker from the database;

[0133] Based on the current shell temperature rise difference and the correlation relationship, the current internal contact temperature rise difference of the GIS circuit breaker is determined.

[0134] In one embodiment, when the computer program is executed by the processor, the following steps are also implemented: determining the fault location of the GIS circuit breaker; adjusting the temperature rise value of the internal contacts of the fault location to a preset temperature, and determining the current value corresponding to the preset temperature as the current upper limit value; based on the current upper limit value, performing temperature rise tests on the internal contacts of the fault location and the outer casing of the GIS circuit breaker in the fault state, to obtain multiple abnormal internal contact temperature rise values ​​and multiple abnormal outer casing temperature rise values; each abnormal internal contact temperature rise value refers to the temperature rise value of the internal contacts of the fault location; each abnormal outer casing temperature rise value refers to the outer casing temperature rise value of the GIS circuit breaker in the fault state; based on the multiple abnormal internal contact temperature rise values ​​and the multiple normal internal contact temperature rise values, determining multiple historical internal contact temperature rise differences, and storing the multiple historical internal contact temperature rise differences in a database; and, based on the multiple abnormal outer casing temperature rise values ​​and the multiple normal outer casing temperature rise values, determining multiple historical outer casing temperature rise differences, and storing the multiple historical outer casing temperature rise differences in a database.

[0135] In one embodiment, a computer program is executed by a processor to implement a temperature rise test on the internal contacts of the faulty part and the casing of the GIS circuit breaker in a faulty state based on the upper limit value of the current flow, and when multiple abnormal internal contact temperature rise values ​​and multiple abnormal casing temperature rise values ​​are obtained, the following steps are specifically implemented: determining multiple current flow values ​​that are less than or equal to the upper limit value of the current flow; for each current flow value, when it is determined that the internal contacts of the faulty part pass current and the temperature rise value of the internal contacts is less than or equal to a preset temperature rise difference within a preset time period, obtaining the abnormal internal contact temperature rise value corresponding to the current flow value and the abnormal casing temperature rise value in the faulty state of the GIS circuit breaker.

[0136] In one embodiment, when the computer program is executed by the processor, the following steps are also implemented: obtaining the current normal internal contact temperature rise value and the current abnormal internal contact temperature rise value of the GIS circuit breaker measured by the temperature patrol meter; determining the actual internal contact temperature rise difference of the GIS circuit breaker based on the current normal internal contact temperature rise value and the current abnormal internal contact temperature rise value; determining the error between the actual internal contact temperature rise difference and the current internal contact temperature rise difference; when the error is less than or equal to a preset error threshold, determining the current internal contact temperature rise difference as the final internal contact temperature rise difference of the GIS circuit breaker.

[0137] In one embodiment, when the computer program is executed by the processor, the following steps are also implemented: obtaining a correspondence table between each internal contact temperature rise difference interval and the operating status of the GIS circuit breaker from a database; searching the correspondence table for the current operating status of the GIS circuit breaker corresponding to the interval to which the final internal contact temperature rise difference belongs; and outputting the current operating status of the GIS circuit breaker so that the user can determine the decision result for the GIS circuit breaker based on the current operating status of the GIS circuit breaker.

[0138] In one embodiment, when the computer program is executed by the processor, the following steps are also implemented: determining the internal contact temperature rise difference corresponding to the upper limit value of the current flow; dividing the temperature rise difference of the historical internal contact temperature rise difference less than or equal to the internal contact temperature rise difference corresponding to the upper limit value of the current flow into multiple internal contact temperature rise difference intervals, and determining the operating state of the GIS circuit breaker corresponding to each internal contact temperature rise difference interval; generating a correspondence table between each internal contact temperature rise difference interval and the operating state of the GIS circuit breaker, and storing the correspondence table in a database.

[0139] It should be noted that the data involved in this application (including but not limited to multiple historical shell temperature rise differences, multiple historical internal contact temperature rise differences, current shell temperature rise differences, etc.) are all information and data authorized by the user or fully authorized by all parties, and the collection, use and processing of relevant data must comply with relevant regulations.

[0140] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0141] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0142] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A method for determining the internal temperature rise difference of a GIS circuit breaker based on internal characteristic inversion, characterized in that: The method comprises: Acquire multiple historical shell temperature rise differences and multiple historical internal contact temperature rise differences of the GIS circuit breaker from the database; wherein each of the historical shell temperature rise differences corresponds to one of the historical internal contact temperature rise differences; Fitting a plurality of the historical shell temperature rise differences and a plurality of the historical internal contact temperature rise differences to obtain a correlation relationship between the historical shell temperature rise differences and the historical internal contact temperature rise differences; Acquire the current shell temperature rise difference of the GIS circuit breaker from the database; Based on the current shell temperature rise difference and the association relationship, the current internal contact temperature rise difference of the GIS circuit breaker is determined.

2. The method according to claim 1, characterized in that The method further comprises: Determining a fault location of the GIS circuit breaker; Adjusting the internal contact temperature rise value of the fault part to a preset temperature, and determining the flow value corresponding to the preset temperature as the flow upper limit value; Based on the upper limit of the current flow, a temperature rise test is performed on the internal contacts of the fault part and the casing of the GIS circuit breaker in the fault state to obtain a plurality of abnormal internal contact temperature rise values ​​and a plurality of abnormal casing temperature rise values; each of the abnormal internal contact temperature rise values ​​refers to the temperature rise value of the internal contacts of the fault part; each of the abnormal casing temperature rise values ​​refers to the casing temperature rise value of the GIS circuit breaker in the fault state; Based on the multiple abnormal internal contact temperature rise values ​​and the multiple normal internal contact temperature rise values, the multiple historical internal contact temperature rise differences are determined, and the multiple historical internal contact temperature rise differences are stored in the database; and, based on the multiple abnormal outer shell temperature rise values ​​and the multiple normal outer shell temperature rise values, the multiple historical outer shell temperature rise differences are determined, and the multiple historical outer shell temperature rise differences are stored in the database.

3. The method according to claim 2, characterized in that Based on the upper limit of the through-current, a temperature rise test is performed on the internal contacts of the fault part and the housing of the GIS circuit breaker in the fault state to obtain a plurality of abnormal internal contact temperature rise values ​​and a plurality of abnormal housing temperature rise values, including: Determining a plurality of throughflow values ​​that are less than or equal to the throughflow upper limit value; For each of the current-carrying values, when it is determined that current is flowing through the internal contacts of the faulty part and the temperature rise of the internal contacts is less than or equal to a preset temperature rise difference within a preset time period, the abnormal internal contact temperature rise corresponding to the current-carrying value and the abnormal casing temperature rise of the GIS circuit breaker in the faulty state are obtained.

4. The method according to claim 2 or 3, characterized in that: The method further comprises: Obtaining a current normal internal contact temperature rise value and a current abnormal internal contact temperature rise value of the GIS circuit breaker measured by a temperature inspection instrument; Determining an actual internal contact temperature rise difference of the GIS circuit breaker based on the current normal internal contact temperature rise value and the current abnormal internal contact temperature rise value; Determining an error between the actual internal contact temperature rise difference and the current internal contact temperature rise difference; When the error is less than or equal to a preset error threshold, the current internal contact temperature rise difference is determined as a final internal contact temperature rise difference of the GIS circuit breaker.

5. The method according to claim 4, characterized in that The method further comprises: Obtaining from the database a corresponding relationship table between each internal contact temperature rise difference interval and the operating state of the GIS circuit breaker; From the corresponding relationship table, searching for the current operating state of the GIS circuit breaker corresponding to the interval to which the final internal contact temperature rise difference belongs; The current operating status of the GIS circuit breaker is output so that a user can determine a decision result for the GIS circuit breaker based on the current operating status of the GIS circuit breaker.

6. The method according to claim 5, characterized in that The method further comprises: Determine the internal contact temperature rise difference corresponding to the upper limit value of the through-current; Divide the temperature rise difference of the historical internal contact temperature rise difference less than or equal to the internal contact temperature rise difference corresponding to the current upper limit value into multiple intervals, and determine the operating state of the GIS circuit breaker corresponding to each internal contact temperature rise difference interval; A correspondence table between each of the internal contact temperature rise difference intervals and the operating status of the GIS circuit breaker is generated, and the correspondence table is stored in the database.

7. A device for determining the internal temperature rise difference of a GIS circuit breaker based on internal characteristic inversion, characterized in that: The device comprises: An acquisition module, used to acquire multiple historical shell temperature rise differences and multiple historical internal contact temperature rise differences of the GIS circuit breaker from a database; wherein each of the historical shell temperature rise differences corresponds to one of the historical internal contact temperature rise differences; A processing module, used for fitting a plurality of the historical shell temperature rise differences and a plurality of the historical internal contact temperature rise differences to obtain a correlation relationship between the historical shell temperature rise differences and the historical internal contact temperature rise differences; The acquisition module is further used to acquire the current shell temperature rise difference of the GIS circuit breaker from the database; A determination module is used to determine the current internal contact temperature rise difference of the GIS circuit breaker based on the current shell temperature rise difference and the association relationship.

8. A computer device, characterized in that: The method comprises a memory and a processor, wherein the memory stores a computer program, and the processor implements the steps of the method according to any one of claims 1 to 6 when executing the computer program.

9. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

10. A computer program product, comprising a computer program, characterized in that When the computer program is executed by a processor, the steps of the method according to any one of claims 1 to 6 are implemented.

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