A line load test secondary current loop remote diagnosis method and system

Abstract

The application discloses a kind of line load test secondary current loop remote diagnosis method and system, including the current and voltage analog data generated by various protection devices in load test are collected;The data is uploaded, and the data is distinguished by CT ratio remote diagnosis, phase sequence wiring remote diagnosis and loop polarity remote diagnosis, and diagnostic results are given;The application can automatically analyze and judge whether secondary current is correct by CT ratio remote diagnosis, phase sequence wiring remote diagnosis and loop polarity remote diagnosis, reduce the workload of field operation personnel, also avoid the problem of human error, reduce equipment commissioning time.

Description

Technical Field

[0001] This invention relates to the field of current loop diagnostic technology, and in particular to a method and system for remote diagnostics of secondary current loops during line load testing. Background Technology

[0002] Before new equipment is put into operation, a load test is required to verify the correctness of the secondary current circuit wiring. Currently, on-site load testing to verify the polarity, turns ratio, and wiring correctness of the secondary current circuit is mainly done manually. On-site personnel measure current, voltage, and phase to draw a hexagonal diagram and manually judge the correctness of the wiring. With the rapid development of the power system and the increasing power load, the demand for new or expanded substations and technical renovation projects is constantly increasing, and the workload of verifying the correctness of wiring through load testing is also increasing. In addition, relying on the judgment of on-site personnel is affected by their experience, and the accuracy and timeliness cannot be guaranteed, which will also affect the equipment commissioning time. Summary of the Invention

[0003] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the invention.

[0004] In view of the aforementioned existing problems, this invention is proposed. Therefore, this invention provides a remote diagnostic method for the secondary current loop during line load testing to solve the problems in the background art.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution:

[0006] In a first aspect, the present invention provides a method for remote diagnosis of the secondary current loop during line load testing, comprising:

[0007] Collect simulated current and voltage data generated by various protection devices during load testing;

[0008] The data is uploaded and remotely diagnosed via CT ratio. The remote diagnosis of CT ratio is used as the first diagnostic method. If the first diagnostic method is correct, the second diagnostic method is performed. The second diagnostic method consists of remote diagnosis of phase sequence wiring and remote diagnosis of circuit polarity. The power is obtained through the second diagnostic method. If both the second diagnostic method and the power are correct, the relationship between the line capacitance and current data is determined.

[0009] The discrimination is the third diagnostic method. If the discrimination is correct, a diagnostic result is given. If the discrimination is incorrect, it returns to the second diagnostic method and sends the discrimination result to the first diagnostic method for CT ratio remote diagnosis until the diagnostic result of all data is obtained.

[0010] As a preferred embodiment of the remote diagnostic method for the secondary current circuit of a line under load test according to the present invention, various protection devices include:

[0011] Line main protection device 1, line main protection device 2, bus differential protection device, fault recorder device, safety and automatic device and measurement and control device.

[0012] As a preferred embodiment of the remote diagnostic method for the secondary current circuit of a line under load test according to the present invention, the data upload includes:

[0013] The data supported in the device model file, as well as the primary current value, active power, reactive power, and power flow data of the OCS system in the measurement and control device, are uploaded through the communication protocol of the security information substation.

[0014] As a preferred embodiment of the remote diagnostic method for the secondary current circuit during line load testing according to the present invention, the remote diagnostic method for CT transformer ratio includes:

[0015] If the calculated value of the secondary phase current of various protection devices is less than or equal to 5% of the primary current value, it is determined that the CT ratio of the current loop of the protection device is correct, and the phase sequence wiring criterion of the current loop continues; otherwise, it indicates that the CT ratio of the current loop is abnormal.

[0016] As a preferred embodiment of the remote diagnostic method for the secondary current circuit of a line under load test according to the present invention, the remote diagnostic method for phase sequence wiring includes:

[0017] If the difference between the current secondary phase current angle and the next secondary phase current angle of various protection devices is within the range of (120°±10°), then power calculation is performed; otherwise, it indicates that the phase sequence wiring of the current loop is abnormal.

[0018] As a preferred embodiment of the remote diagnostic method for the secondary current circuit during line load testing according to the present invention, the remote polarity diagnostic method includes:

[0019] By combining the analog current and voltage of the protection device, the setting sheet, and the power flow P and Q values ​​of the OCS system in the measurement and control device, the power is calculated and a hexagonal diagram is drawn based on the results of remote diagnosis of CT ratio and phase sequence wiring. If the judgment result is incorrect, it indicates that the current loop polarity is abnormal.

[0020] As a preferred embodiment of the remote diagnostic method for the secondary current circuit of a line under load test according to the present invention, it further includes:

[0021] After calculating the power, the relationship between the phase current through the line capacitor current, the phase current phasor, and the line differential current amplitude is determined. If the relationship is satisfied, it indicates that the polarity of the secondary circuit loop is normal.

[0022] Secondly, the present invention provides a remote diagnostic system for the secondary current circuit of a line under load test, comprising:

[0023] The data acquisition module collects simulated current and voltage data generated by various protection devices during load testing;

[0024] The diagnostic module uploads the data and performs remote diagnosis via CT ratio. The remote diagnosis of CT ratio is used as the first diagnostic method. If the first diagnostic method is correct, the second diagnostic method is performed. The second diagnostic method consists of remote diagnosis of phase sequence wiring and remote diagnosis of circuit polarity. The power is obtained through the second diagnostic method. If both the second diagnostic method and the power are correct, the relationship between the line capacitance and current data is determined.

[0025] The result output module uses the third diagnostic method for discrimination. If the discrimination is correct, a diagnostic result is given; if the discrimination is incorrect, it returns to the second diagnostic method and sends the discrimination result to the first diagnostic method for CT ratio remote diagnosis until the diagnostic results of all data are obtained.

[0026] Thirdly, the present invention provides a computer device, including a memory and a processor, wherein the memory stores a computer program, and the processor executes the computer program to implement any step of the above-described method.

[0027] Fourthly, the present invention provides a computer-readable storage medium having a computer program stored thereon, wherein the computer program, when executed by a processor, implements any step of the above-described method.

[0028] Compared with existing technologies, the beneficial effects of this invention are as follows: This invention collects simulated current and voltage data generated by various protection devices during load testing; uploads the data, and uses remote diagnostics of CT ratio, phase sequence wiring, and circuit polarity to judge the data and provide diagnostic results; this invention can automatically analyze and judge whether the secondary current is correct through remote diagnostics of CT ratio, phase sequence wiring, and circuit polarity, reducing the workload of on-site maintenance personnel, while also avoiding human error and reducing equipment commissioning time. Attached Figure Description

[0029] To more clearly illustrate the technical solutions of the embodiments of the present invention, the accompanying drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort. Wherein:

[0030] Figure 1 This is a flowchart illustrating the overall process of a remote diagnostic method for the secondary current loop during line load testing, as described in one embodiment of the present invention.

[0031] Figure 2 This is a flowchart illustrating the steps of a remote diagnostic method for the secondary current loop during line load testing according to an embodiment of the present invention.

[0032] Figure 3 This is a system architecture diagram of a remote diagnostic method for the secondary current loop during line load testing according to an embodiment of the present invention. Detailed Implementation

[0033] To make the above-mentioned objects, features, and advantages of the present invention more apparent and understandable, specific embodiments of the present invention will be described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of the present invention, and not all of them. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0034] Many specific details are set forth in the following description in order to provide a full understanding of the invention. However, the invention may also be practiced in other ways different from those described herein, and those skilled in the art can make similar extensions without departing from the spirit of the invention. Therefore, the invention is not limited to the specific embodiments disclosed below.

[0035] Secondly, the term "one embodiment" or "embodiment" as used herein refers to a specific feature, structure, or characteristic that may be included in at least one implementation of the present invention. The phrase "in one embodiment" appearing in different places in this specification does not necessarily refer to the same embodiment, nor is it a single or selective embodiment that is mutually exclusive with other embodiments.

[0036] This invention is described in detail with reference to the schematic diagrams. When detailing the embodiments of this invention, for ease of explanation, the cross-sectional views illustrating the device structure may be partially enlarged, not adhering to the usual scale. Furthermore, the schematic diagrams are merely examples and should not be construed as limiting the scope of protection of this invention. In actual fabrication, the three-dimensional spatial dimensions of length, width, and depth should be included.

[0037] Furthermore, in the description of this invention, it should be noted that the terms "upper," "lower," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are used solely for the convenience of describing the invention and for simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the invention. In addition, the terms "first," "second," or "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0038] Unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" in this invention should be interpreted broadly. For example, they can refer to fixed connections, detachable connections, or integral connections; similarly, they can refer to mechanical connections, electrical connections, or direct connections, or indirect connections through an intermediate medium, or internal connections between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0039] Example 1

[0040] Reference Figure 1 and Figure 2 This is the first embodiment of the present invention, which provides a remote diagnostic method for the secondary current loop of a line under load, comprising:

[0041] S1. Collect simulated current and voltage data generated by various protection devices during the load test;

[0042] Furthermore, various protection devices include main line protection device 1, main line protection device 2, bus differential protection device, fault recorder device, safety and automatic device, and measurement and control device;

[0043] S2. Upload the data and perform remote diagnosis via CT ratio. Use remote diagnosis of CT ratio as the first diagnostic method. If the first diagnostic method is correct, proceed to the second diagnostic method. The second diagnostic method consists of remote diagnosis of phase sequence wiring and remote diagnosis of circuit polarity. Obtain the power through the second diagnostic method. If both the second diagnostic method and the power are correct, determine the relationship between the line capacitance and current data.

[0044] Furthermore, the data supported in the device model file and the primary current value, active power, reactive power and power flow data of the OCS system in the measurement and control device are uploaded through the protection and information substation using the communication protocol.

[0045] Furthermore, if the calculated value of the secondary phase current of various protection devices relative to the primary current value is less than or equal to 5%, it is determined that the CT ratio of the current loop of the protection device is correct, and the phase sequence wiring criterion of the current loop continues; otherwise, it indicates that the CT ratio of the current loop is abnormal.

[0046] It should be noted that the remote diagnostic platform will compare the collected information with the primary current I in the OCS system. A I B I C The value is calculated to determine whether the secondary current loop turns ratio is correct;

[0047] Specifically, the current transformer (CT) ratio of the protection device's current loop is determined, taking the main protection device's current loop as an example, as shown below:

[0048]

[0049]

[0050]

[0051] Among them, I a To collect the secondary A-phase current value for the protection device, I b To collect the secondary B-phase current value and I of the protection device c To collect the secondary C-phase current value for the protection device, n CT The current transformer (CT) ratio is read from the setting sheet of the protection device by the remote diagnostic platform for the secondary current circuit.

[0052] Furthermore, if the difference between the current secondary phase current angle and the next secondary phase current angle of various protection devices is within the range of (120°±10°), then power calculation is performed; otherwise, it indicates that the phase sequence wiring of the current loop is abnormal.

[0053] Specifically, determining the phase sequence wiring of the current circuit, taking the current circuit of the main protection device as an example, is as follows:

[0054] Φ a -Φ b ∈(120°±10°)

[0055] Φ b -Φ c ∈(120°±10°)

[0056] Φ c -Φ a ∈(120°±10°)

[0057] Where, Φ a To collect the secondary A-phase current angle for the protection device, Φ b To collect the secondary B-phase current angle and Φ of the protection device c To collect the angle of the secondary C-phase current for the protection device;

[0058] Furthermore, by combining the analog current and voltage of the protection device, the setting sheet, and the power flow P and Q values ​​of the OCS system in the measurement and control device, the power is calculated and a hexagonal diagram is drawn based on the results of remote diagnosis of CT ratio and phase sequence wiring. If the judgment result is incorrect, it indicates that the current loop polarity is abnormal.

[0059] Specifically, the P and Q values ​​of the power flow are expressed as:

[0060] P = [U a *I a *cosΦ a +U a *I b *cos(Φ b -120°)+U a *I c *cos(Φ c -240°)]*n PT *n CT

[0061] Q = [U a *I a *sinΦ a +U a *I b *sin(Φ b -120°)+U a *I c *sin(Φ c -240°)]*n PT *n CT

[0062] It should be noted that after the line is under load, the line voltage A phase (when the protection uses the line voltage) or the bus voltage A phase (when the protection uses the bus voltage) collected by the remote diagnostic platform is U. a Benchmark value;

[0063] Where, n PT The voltage transformer (PT) ratio is read from the setting sheet of the protection device by the remote diagnostic platform for the secondary current circuit.

[0064] Furthermore, the power calculation is expressed as:

[0065]

[0066]

[0067] Among them, P O Q is the active power value extracted from the OCS system. O This represents the reactive power value extracted from the OCS system.

[0068] S3. If the third diagnostic method is selected, a diagnostic result is given if the selection is correct. If the selection is incorrect, the system returns to the second diagnostic method and sends the selection result to the first diagnostic method for remote CT scaling diagnosis until all data are obtained.

[0069] Furthermore, after calculating the power, the relationship between the phase current through the line capacitor current, the phase current phasor, and the line differential current amplitude is determined. If the relationship is satisfied, it indicates that the polarity of the secondary circuit loop is normal.

[0070] Specifically, the relationship between the phase current, phase current phasor, and differential current amplitude of the line capacitance current is expressed as follows:

[0071]

[0072]

[0073]

[0074] in, This refers to the A-phase current on this side of the line. This refers to the B-phase current phasor on this side of the line. This refers to the C-phase current phasor on this side of the line. This refers to the A-phase current on the opposite side of the line. For the B-phase current phasor on the opposite side of the line, I is the phasor of the C-phase current on the opposite side of the line. ad I bd I cd The differential current amplitudes for lines A, B, and C are respectively.

[0075] It should be noted that when all the above diagnoses are correct, a load test report is generated and archived to verify its accuracy.

[0076] Furthermore, this embodiment also provides a remote diagnostic system for the secondary current loop of a line under load test, comprising:

[0077] The data acquisition module collects simulated current and voltage data generated by various protection devices during load testing;

[0078] The diagnostic module uploads the data and performs remote diagnosis via CT ratio. The remote diagnosis of CT ratio is used as the first diagnostic method. If the first diagnostic method is correct, the second diagnostic method is performed. The second diagnostic method consists of remote diagnosis of phase sequence wiring and remote diagnosis of circuit polarity. The power is obtained through the second diagnostic method. If both the second diagnostic method and the power are correct, the relationship between the line capacitance and current data is determined.

[0079] The result output module uses the third diagnostic method for discrimination. If the discrimination is correct, a diagnostic result is given; if the discrimination is incorrect, it returns to the second diagnostic method and sends the discrimination result to the first diagnostic method for CT ratio remote diagnosis until the diagnostic results of all data are obtained.

[0080] This embodiment also provides a computer device suitable for remote diagnostic methods of secondary current circuits during line load testing, including:

[0081] The system includes a memory and a processor. The memory stores computer-executable instructions, and the processor executes these instructions to implement the remote diagnostic method for the secondary current loop of a line under load test as described in the above embodiments.

[0082] The computer device can be a terminal, comprising a processor, memory, communication interface, display screen, and input devices connected via a system bus. The processor provides computing and control capabilities. The memory includes non-volatile storage media and internal memory. The non-volatile storage media stores the operating system and computer programs. The internal memory provides an environment for the operation of the operating system and computer programs stored in the non-volatile storage media. The communication interface is used for wired or wireless communication with external terminals; wireless communication can be achieved through Wi-Fi, carrier networks, NFC (Near Field Communication), or other technologies. The display screen can be an LCD screen or an e-ink screen. The input devices can be a touch layer covering the display screen, buttons, a trackball, or a touchpad on the computer device's casing, or an external keyboard, touchpad, or mouse.

[0083] This embodiment also provides a storage medium storing a computer program that, when executed by a processor, implements the remote diagnostic method for the secondary current circuit of a line under load test as proposed in the above embodiments.

[0084] The storage medium proposed in this embodiment and the data storage method proposed in the above embodiments belong to the same inventive concept. Technical details not described in detail in this embodiment can be found in the above embodiments, and this embodiment has the same beneficial effects as the above embodiments.

[0085] Example 2

[0086] Reference Figure 3 This is the second embodiment of the present invention. This embodiment provides a remote diagnostic system for the secondary current circuit of a line under load test, including: a remote diagnostic platform, a line main protection device, a line main second protection device, a bus differential protection device, a fault recorder device, an automatic safety device, a measurement and control device, a motion device, a protection and information substation, and a power dispatch data network security zone I.

[0087] The line main protection device, line main secondary protection device, and bus differential protection device generate various current and analog current data, generate model files supporting analog quantities, switching quantities, self-test quantities, and alarm quantities, and merge them with the information from the fault recorder device. The information is then sent and uploaded to the power dispatch data network security zone I via a communication protocol. Simultaneously, the safety and control devices collect active power, reactive power, current, voltage, and electrical quantity data, transmitting the information collected from the primary equipment to the motion device. The motion device transmits and exchanges information from the power dispatch data network security zone I in real time, providing it to the OCS system in the measurement and control device. Finally, the information from the power dispatch data network security zone I is summarized and uploaded to the remote diagnostic platform for diagnostic analysis.

[0088] The steps for simulating the on-site experiment are as follows:

[0089] 1. Simulate the load test data of the protection device in sequence;

[0090] 2. Enter the remote diagnostic system for the secondary circuit of the line under load test. After the system is triggered, it will call the analog quantity and setting sheet of the relevant protection devices of the line bay and retrieve the primary current value, active power and reactive power flow data of the OCS system.

[0091] 3. Perform remote diagnostics on CT ratio, phase sequence wiring, and circuit polarity of the data, and generate a diagnostic report;

[0092] 4. Compare the results of the diagnostic report with the set test conditions to see if they are consistent. Refer to Table 1.

[0093] Table 1

[0094]

[0095] As can be seen from Table 1, the diagnostic results of this invention are consistent with the experimental report, which fully demonstrates that the method of this invention can accurately determine whether the secondary current is correct, reduce the workload of on-site maintenance personnel, and avoid the problem of personnel misjudging operations.

[0096] Those skilled in the art will understand that embodiments of the present invention can be provided as methods, systems, or computer program products. Therefore, this application can take the form of a completely hardware embodiment, a completely software embodiment, or an embodiment combining software and hardware aspects. Furthermore, this application can take the form of a computer program product implemented on one or more computer-usable storage media (including but not limited to disk storage, CD-ROM, optical storage, etc.) containing computer-usable program code. The solutions in the embodiments of this application can be implemented using various computer languages, such as the object-oriented programming language Java and the interpreted scripting language JavaScript.

[0097] This application is described with reference to flowchart illustrations and / or block diagrams of methods, apparatus (systems), and computer program products according to embodiments of this application. It will be understood that each block of the flowchart illustrations and / or block diagrams, and combinations of blocks in the flowchart illustrations and / or block diagrams, can be implemented by computer program instructions. These computer program instructions can be provided to a processor of a general-purpose computer, special-purpose computer, embedded processor, or other programmable data processing apparatus to produce a machine, such that the instructions, which execute via the processor of the computer or other programmable data processing apparatus, generate instructions for implementing the flowchart... Figure 1 One or more processes and / or boxes Figure 1 A device that provides the functions specified in one or more boxes.

[0098] These computer program instructions may also be stored in a computer-readable storage medium that can direct a computer or other programmable data processing device to function in a particular manner, such that the instructions stored in the computer-readable storage medium produce an article of manufacture including instruction means, which are implemented in a process Figure 1 One or more processes and / or boxes Figure 1 The function specified in one or more boxes.

[0099] These computer program instructions may also be loaded onto a computer or other programmable data processing equipment to cause a series of operational steps to be performed on the computer or other programmable equipment to produce a computer-implemented process, thereby providing instructions that execute on the computer or other programmable equipment for implementing the process. Figure 1 One or more processes and / or boxes Figure 1 The steps of the function specified in one or more boxes.

[0100] Although preferred embodiments of this application have been described, those skilled in the art, upon learning the basic inventive concept, can make other changes and modifications to these embodiments. Therefore, the appended claims are intended to be interpreted as including the preferred embodiments as well as all changes and modifications falling within the scope of this application.

[0101] Obviously, those skilled in the art can make various modifications and variations to this application without departing from the spirit and scope of this application. Therefore, if such modifications and variations fall within the scope of the claims of this application and their equivalents, this application also intends to include such modifications and variations.

Claims

1. A method for remote diagnosis of the secondary current loop during line load testing, characterized in that, include: Collect simulated current and voltage data generated by various protection devices during load testing; The data is uploaded and remotely diagnosed via CT ratio, which is used as the first diagnostic method. If the first diagnostic method is correct, a second diagnostic method is performed. The second diagnostic method consists of remote diagnosis of phase sequence wiring and remote diagnosis of circuit polarity. After the remote diagnosis of phase sequence wiring is correct, power calculation is performed, and circuit polarity remote diagnosis is performed based on the power calculation results. If both the remote diagnosis of phase sequence wiring and the remote diagnosis of circuit polarity in the second diagnostic method are correct, the relationship between the line capacitance current data is determined. The discrimination is the third diagnostic method. If the discrimination is correct, a diagnostic result is given. If the discrimination is incorrect, it returns to the second diagnostic method and sends the discrimination result of the third diagnostic method to the first diagnostic method for CT ratio remote diagnosis until the diagnostic result of all data is obtained. Uploading the data includes uploading the data supported in the device model file and the primary current value, active power, reactive power and power flow data of the OCS system in the measurement and control device through the communication protocol of the security information substation. Remote diagnostics of CT ratio includes: if the calculated value of the secondary phase current value of various protection devices relative to the primary current value is less than or equal to 5%, it is determined that the CT ratio of the current loop of the protection device is correct, and the phase sequence wiring criteria of the current loop are continued; otherwise, it indicates that the CT ratio of the current loop is abnormal. Remote diagnostics of phase sequence wiring includes: if the difference between the current secondary phase current angle and the next secondary phase current angle of various protection devices is within the range, then power calculation is performed; otherwise, it indicates that the phase sequence wiring of the current loop is abnormal. Polarity remote diagnosis includes: using the analog quantities of secondary phase current and voltage of the protection device, the setting sheet, and the power flow P and Q values ​​of the OCS system in the measurement and control device, combined with the results of CT ratio remote diagnosis and phase sequence wiring remote diagnosis, to calculate the power and draw a hexagonal diagram. If the judgment result is incorrect, it indicates that the current loop polarity is abnormal. After calculating the power, the relationship between the phase current through the line capacitor current, the phase current phasor, and the line differential current amplitude is determined. If the relationship is satisfied, it indicates that the polarity of the secondary circuit loop is normal.

2. The remote diagnostic method for the secondary current loop of a line under load as described in claim 1, characterized in that, Various protective devices, including: Line main protection device 1, line main protection device 2, bus differential protection device, fault recorder device, safety and automatic device and measurement and control device.

3. A remote diagnostic system for the secondary current loop of a line under load test, based on the remote diagnostic method for the secondary current loop of a line under load test according to any one of claims 1 to 2, characterized in that, include: The data acquisition module collects simulated current and voltage data generated by various protection devices during load testing; The diagnostic module uploads the data and performs remote diagnostics via CT ratio, using this remote diagnostics as the first diagnostic method. If the first diagnostic method is correct, a second diagnostic method is performed. The second diagnostic method consists of remote diagnostics of phase sequence wiring and remote diagnostics of circuit polarity. After confirming that the remote diagnostics of phase sequence wiring is correct, power calculation is performed, and based on the power calculation results, remote diagnostics of circuit polarity is performed. If both the remote diagnostics of phase sequence wiring and the remote diagnostics of circuit polarity in the second diagnostic method are correct, the relationship between the line capacitance and current data is determined. The result output module uses the third diagnostic method for discrimination. If the discrimination is correct, a diagnostic result is given; if the discrimination is incorrect, it returns to the second diagnostic method and sends the discrimination result of the third diagnostic method to the first diagnostic method for CT ratio remote diagnosis until the diagnostic results of all data are obtained.

4. A computer device comprising a memory and a processor, wherein the memory stores a computer program, characterized in that: When the processor executes the computer program, it implements the steps of the method according to any one of claims 1 to 2.

5. A computer-readable storage medium having a computer program stored thereon, characterized in that: When the computer program is executed by a processor, it implements the steps of the method according to any one of claims 1 to 2.

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