Fault point identification instrument, fault point identification method, device, equipment and medium

Abstract

The present invention discloses a fault point identification instrument, a fault point identification method, an apparatus, a device and a medium. A fault point identification instrument includes a voltage analog quantity acquisition module, which is used to obtain analog voltage acquisition signals from the test points on the secondary side of the voltage transformer through each analog voltage acquisition port; after converting each analog voltage acquisition signal into a digital voltage conversion signal, each digital voltage conversion signal is sent to a data processing module; the data processing module is used to perform primary side fault detection on the received digital voltage conversion signal, and perform secondary side fault detection on the received digital signal to be analyzed to obtain a detection result; the detection result is sent to the detection result uploading module; the detection result uploading module is used to remotely send the received detection result to the substation background system. The technical solution of the embodiment of the present invention can automatically and accurately lock the primary and secondary side fault points, and improve the recognition efficiency of the primary and secondary side fault points.

Description

Technical Field

[0001] The present invention relates to the field of electrical technology, and in particular to a fault point identification instrument, a fault point identification method, a device, equipment and a medium. Background Art

[0002] When faults occur on the primary and secondary sides of the voltage transformer, it often leads to serious power problems. It is very important to promptly determine the fault points on the primary and secondary sides of the voltage transformer.

[0003] Currently, voltage transformer faults within substations are simply identified by displaying abnormal voltage data. When the voltage of a voltage transformer is abnormal, operators cannot immediately determine whether the fault is a fault in the primary side of the voltage transformer or a fault in the secondary circuit. The specific location of the voltage transformer fault is also unknown, requiring investigation of the fault's scope.

[0004] When troubleshooting a voltage transformer (VT) fault, the substation operator must take a multimeter to the fault site to measure the voltage at the upper and lower ports of the VT's secondary air switch to narrow down the fault location. This process is time-consuming and labor-intensive, and in serious cases, can impact equipment and personnel safety. Summary of the Invention

[0005] The present invention provides a fault point identification instrument, fault point identification method, device, equipment and medium, which can automatically and accurately lock the primary side and secondary side fault points and improve the identification efficiency of the primary side and secondary side fault points.

[0006] According to one aspect of the present invention, a fault point identification instrument is provided, comprising a voltage analog quantity acquisition module, a data processing module, and a detection result transmission module;

[0007] The voltage analog quantity acquisition module includes a plurality of analog voltage acquisition ports and at least one digital voltage output port;

[0008] The voltage analog quantity acquisition module is used to obtain analog voltage acquisition signals from multiple test points on the secondary side of the voltage transformer through each analog voltage acquisition port; after converting each analog voltage acquisition signal into a digital voltage conversion signal, the digital voltage conversion signal is sent to the first type data input port of the data processing module through the digital voltage output port;

[0009] The data processing module is used to perform primary-side fault detection on the digital voltage conversion signal received from the first-type input port, and perform secondary-side fault detection on the digital signal to be analyzed received from each second-type input interface, to obtain detection results; and send the detection results to the detection result uploading module;

[0010] The test result sending module is used to remotely send the received test results to the substation background system.

[0011] According to another aspect of the present invention, a fault point identification method is provided, which is executed by a data processing module in a fault point identification instrument, comprising:

[0012] Performing primary-side fault detection on the digital voltage conversion signal received from the first-type input port, and performing secondary-side fault detection on the digital signal to be analyzed received from each second-type input interface, to obtain a detection result;

[0013] Send the test results to the test result sending module.

[0014] According to another aspect of the present invention, an electronic device is provided, comprising:

[0015] at least one processor; and

[0016] a memory communicatively connected to the at least one processor; wherein,

[0017] The memory stores a computer program executable by the at least one processor. The computer program is executed by the at least one processor so that the at least one processor can perform the fault point identification method according to any embodiment of the present invention.

[0018] According to another aspect of the present invention, a computer-readable storage medium is provided, wherein the computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the fault point identification method according to any embodiment of the present invention when executed.

[0019] The technical solution of the embodiment of the present invention is to form a fault point identification instrument through a voltage analog quantity acquisition module, a data processing module and a detection result uploading module. Through each analog voltage acquisition port of the voltage analog quantity acquisition module, analog voltage acquisition signals are automatically acquired in real time from multiple test points on the secondary side of the voltage transformer, and each analog voltage acquisition signal is converted into a digital voltage conversion signal. After that, each digital voltage conversion signal is sent to the first type of data input port of the data processing module through the digital voltage output port. The data processing module performs primary-side fault detection on the digital voltage conversion signal received from the first-type input port, and performs secondary-side fault detection on the digital signals to be analyzed received from each second-type input interface to obtain the detection results, that is, the data used to identify faults on different sides are received separately through different interfaces, and the fault inspection of the primary and secondary sides of the voltage transformer is performed through the data received by different interfaces. The side to which the fault belongs can be automatically and intelligently identified without manual work, which is convenient for targeted fault detection, and then the detection results are sent to the detection result uploading module, so that the detection result uploading module remotely sends the received detection results to the substation background system, which solves the current problem of only being able to perform simple voltage anomaly identification on both sides of the voltage transformer and the time-consuming manual inspection of voltage transformer faults. It can automatically and accurately lock the primary and secondary side fault points and improve the efficiency of identifying primary and secondary side fault points.

[0020] It should be understood that the content described in this section is not intended to identify the key or important features of the embodiments of the present invention, nor is it intended to limit the scope of the present invention. Other features of the present invention will become readily understood through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the following briefly introduces the drawings required for use in the description of the embodiments. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0022] Figure 1 This is a schematic diagram of a fault point identification instrument provided in the first embodiment of the present invention;

[0023] Figure 2 A flowchart of a fault point identification method provided in the second embodiment of the present invention;

[0024] Figure 3 This is a voltage acquisition principle diagram of a fault point identification instrument provided in the third embodiment of the present invention;

[0025] Figure 4 This is a hardware circuit diagram of a primary-side fault detection logic provided by the third embodiment of the present invention;

[0026] Figure 5 This is a hardware circuit diagram of a secondary side fault detection logic provided by the third embodiment of the present invention;

[0027] Figure 6 A schematic diagram of the structure of a fault point identification device provided in the fourth embodiment of the present invention;

[0028] Figure 7 A schematic structural diagram of an electronic device that can be used to implement an embodiment of the present invention is shown. DETAILED DESCRIPTION

[0029] In order to enable those skilled in the art to better understand the solutions of the present invention, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0030] It should be noted that the terms "first", "second", etc. in the description and claims of the present invention and the above-mentioned drawings are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that the numbers used in this way can be interchanged where appropriate, so that the embodiments of the present invention described herein can be implemented in an order other than those illustrated or described herein. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0031] Example 1

[0032] Figure 1 Schematic diagram of a fault point identification instrument provided by the first embodiment of the present invention, such as Figure 1As shown, the fault point identification instrument may include a voltage analog acquisition module 110, a data processing module 120, and a detection result transmission module 130. The voltage analog acquisition module 110 may include multiple analog voltage acquisition ports and at least one digital voltage output port. The voltage analog acquisition module 110 is configured to acquire analog voltage acquisition signals from multiple test points on the secondary side of the voltage transformer via each analog voltage acquisition port. After converting each analog voltage acquisition signal into a digital voltage conversion signal, the digital voltage conversion signal is transmitted to the first-type data input port of the data processing module 120 via the digital voltage output port. The data processing module 120 is configured to perform primary-side fault detection on the digital voltage conversion signal received from the first-type input port and to perform secondary-side fault detection on the digital signals to be analyzed received from each second-type input port, thereby obtaining detection results. The detection results are then transmitted to the detection result transmission module 130. The detection result transmission module 130 is configured to remotely transmit the received detection results to the substation backend system.

[0033] The voltage analog acquisition module 110 may be a device that acquires analog voltage signals and performs analog-to-digital conversion. The analog voltage acquisition port may be the port in the voltage analog acquisition module 110 that acquires analog voltage signals. The digital voltage output port may be the port in the voltage analog acquisition module 110 that outputs the digital signal corresponding to the analog voltage signal. The test point may be a point on the secondary side of the voltage transformer where the analog voltage acquisition port acquires analog voltage signals. The analog voltage acquisition signal may be the analog voltage signal acquired by the analog voltage acquisition port. The digital voltage conversion signal may be the result of analog-to-digital conversion of the analog voltage acquisition signal. The data processing module 120 may be a device that detects the fault side based on received data. The first-type data input port may be the port through which the data processing module 120 receives the digital voltage conversion signal sent by the voltage analog acquisition module 110. The second-type input interface may be a type of interface in the data processing module 120 that receives data for determining secondary-side faults. The digital signal to be analyzed may be data used to determine secondary-side faults. The detection result transmission module 130 may be a communication device equipped with data reception and forwarding capabilities.

[0034] In an embodiment of the present invention, the voltage analog acquisition module 110, data processing module 120, and detection result transmission module 130 in the fault point identification instrument are sequentially communicatively connected. The voltage analog acquisition module 110 collects signals from multiple test points on the secondary side of the voltage transformer through its analog voltage acquisition ports, obtaining analog voltage signals. It then performs analog-to-digital conversion on each of these signals to generate digital voltage signals, which it then transmits to the first-type data input port of the data processing module 120 via its digital voltage output port. The data processing module 120 determines whether a fault exists on the primary side and the type of primary fault based on the digital voltage signals received at the first-type input port. It also analyzes the digital signals to be analyzed, received through the second-type input ports, to determine whether a fault exists on the secondary side and the type of secondary fault. The data processing module 120 further uses the determined faulty side and fault type as detection results, which it then transmits to the detection result transmission module 130. After receiving the test results, the test result uploading module 130 sends the received test results to the substation background system, and then the substation background system displays the test results so that the operation and maintenance personnel can perform operation and maintenance on the fault point in time according to the fault information.

[0035] The technical solution of the embodiment of the present invention is to form a fault point identification instrument through a voltage analog quantity acquisition module, a data processing module and a detection result uploading module. Through each analog voltage acquisition port of the voltage analog quantity acquisition module, analog voltage acquisition signals are automatically acquired in real time from multiple test points on the secondary side of the voltage transformer, and each analog voltage acquisition signal is converted into a digital voltage conversion signal. After that, each digital voltage conversion signal is sent to the first type of data input port of the data processing module through the digital voltage output port. The data processing module performs primary-side fault detection on the digital voltage conversion signal received from the first-type input port, and performs secondary-side fault detection on the digital signals to be analyzed received from each second-type input interface to obtain the detection results, that is, the data used to identify faults on different sides are received separately through different interfaces, and the fault inspection of the primary and secondary sides of the voltage transformer is performed through the data received by different interfaces. The side to which the fault belongs can be automatically and intelligently identified without manual work, which is convenient for targeted fault detection, and then the detection results are sent to the detection result uploading module, so that the detection result uploading module remotely sends the received detection results to the substation background system, which solves the current problem of only being able to perform simple voltage anomaly identification on both sides of the voltage transformer and the time-consuming manual inspection of voltage transformer faults. It can automatically and accurately lock the primary and secondary side fault points and improve the efficiency of identifying primary and secondary side fault points.

[0036] Example 2

[0037] Figure 2 This is a flow chart of a fault point identification method provided in the second embodiment of the present invention. This embodiment is applicable to the case of automatically and accurately locking the primary and secondary side fault points. The method can be executed by the data processing module in the fault point identification instrument. The fault point identification instrument can be configured in a fault point identification device. The fault point identification device can be implemented in the form of hardware and / or software. The fault point identification device can be configured in an electronic device. Figure 2 As shown, the method includes:

[0038] S210 , performing primary-side fault detection on the digital voltage conversion signal received from the first-type input port, and performing secondary-side fault detection on the digital signals to be analyzed received from each second-type input interface, to obtain detection results.

[0039] In an embodiment of the present invention, the data processing module in the fault point identification instrument can determine whether there is a fault on the primary side and determine the type of primary side fault based on the digital voltage conversion signal received by the first type input port. It can also receive the digital signals to be analyzed through each second type input interface and analyze the digital signals to be analyzed to determine whether there is a fault on the secondary side and determine the type of secondary side fault, and further use the determined fault side and fault type as the detection results.

[0040] S220: Send the detection result to the detection result uploading module.

[0041] In an embodiment of the present invention, the data processing module in the fault point identification instrument can send the detection result to the detection result uploading module, so that the detection result uploading module can remotely send the received detection result to the substation background system.

[0042] In an optional embodiment of the present invention, primary-side fault detection is performed on the digital voltage conversion signal received from the first-type input port, which may include: obtaining the secondary-side phase voltage rating of the voltage transformer; identifying the primary-side winding fault based on the voltage conversion signal at the upper end of the secondary-side air switch of the voltage transformer and the secondary-side phase voltage rating of the voltage transformer in the digital voltage conversion signal; identifying the primary-side voltage loss fault based on the voltage conversion signal at the upper end of the secondary-side air switch of the voltage transformer, the open triangle voltage conversion signal in the digital voltage conversion signal, and the secondary-side phase voltage rating of the voltage transformer.

[0043] Among them, the voltage conversion signal at the upper end of the air switch on the secondary side of the voltage transformer can be a digital voltage signal corresponding to the analog voltage signal at the upper end of the air switch connected to the secondary side of the voltage transformer. The primary side winding fault can be a primary side fault type, indicating that there is a fault in the voltage transformer winding. The open triangle voltage conversion signal can be the analog voltage signal of the open triangle iron that is communicatively connected to the voltage analog quantity acquisition module, and the corresponding digital voltage signal. The primary side voltage loss fault can be a primary side fault type, indicating that there is a voltage loss fault in the primary side phase voltage of the voltage transformer.

[0044] In an embodiment of the present invention, the rated value of the secondary side phase voltage of the voltage transformer can be obtained first, and then the digital voltage conversion signal can be analyzed to determine the voltage conversion signal at the upper end of the secondary side air switch of the voltage transformer. Thus, based on the voltage conversion signal at the upper end of the secondary side air switch of the voltage transformer and the rated value of the secondary side phase voltage of the voltage transformer, the primary side winding fault in the primary side fault can be identified. The primary side voltage loss fault in the primary side fault can also be identified based on the voltage conversion signal at the upper end of the secondary side air switch of the voltage transformer, the open triangle voltage conversion signal in the digital voltage conversion signal, and the rated value of the secondary side phase voltage of the voltage transformer, and the specific phase to which the voltage loss fault belongs can be determined.

[0045] It should be noted that, since the voltage conversion signal at the upper end of the air switch on the secondary side of the voltage transformer has phase differences, while identifying the primary side winding fault, it is also possible to further identify which phase of the winding voltage is abnormal.

[0046] In an optional embodiment of the present invention, secondary side fault detection is performed on the digital signals to be analyzed received from each second-class input interface, which may include: when the voltage conversion signal at the upper end of the secondary side air switch of the voltage transformer is greater than the secondary side phase voltage rated value of the voltage transformer by a first target multiple, obtaining the secondary side air switch status signal of the voltage transformer in the digital signal to be analyzed; when the secondary side air switch status signal of the voltage transformer is not tripped, identifying the secondary side fault type based on the secondary side metering acquisition voltage of the line, the secondary measurement and control and the main protection acquisition voltage, and the main protection acquisition voltage in the digital signal to be analyzed.

[0047] Among them, the first target multiple can be a preset value greater than 0 and less than 1. The voltage transformer secondary side air switch status signal can be a signal that characterizes the status of the voltage transformer secondary side air switch. The voltage transformer secondary side air switch status can include a non-tripped state and a tripped state. The line secondary side metering and collected voltage can be the voltage measured by the grid line watt-hour meter. The secondary measurement and control and main protection collected voltage can be the voltage collected by the grid line measurement and control device and the main protection panel. The main protection collected voltage can be the voltage collected by the main protection panel. The line secondary side metering and collected voltage, the secondary measurement and control and main protection collected voltage, and the main protection collected voltage are all digital voltage signals.

[0048] In an embodiment of the present invention, a first target multiple can be set according to detection needs, and the product of the first target multiple and the voltage transformer secondary side phase voltage rating is calculated, and then the voltage conversion signal of the upper end of the voltage transformer secondary side air switch is compared with the voltage transformer secondary side phase voltage rating of the first target multiple. When the voltage conversion signal of the upper end of the voltage transformer secondary side air switch is greater than the voltage transformer secondary side phase voltage rating of the first target multiple, the digital signal to be analyzed is parsed to obtain the voltage transformer secondary side air switch status signal. When the voltage transformer secondary side air switch status signal is not tripped, the secondary side fault type is identified based on the line secondary side metering acquisition voltage, secondary measurement and control and main protection acquisition voltage, and main protection acquisition voltage in the digital signal to be analyzed.

[0049] In an optional embodiment of the present invention, the secondary side fault type is identified based on the line secondary side metering acquisition voltage, the secondary measurement and control and main protection acquisition voltage, and the main two protection acquisition voltage in the digital signal to be analyzed, which may include: identifying the line secondary side metering circuit fault based on the line secondary side metering acquisition voltage, the second target multiple of the voltage transformer secondary side air switch lower end voltage, and the third target multiple of the voltage transformer secondary side air switch lower end voltage; identifying the secondary measurement and control and main one protection circuit fault based on the secondary measurement and control and main one protection acquisition voltage, the second target multiple of the voltage transformer secondary side air switch lower end voltage, and the third target multiple of the voltage transformer secondary side air switch lower end voltage; identifying the main two protection circuit fault based on the main two protection acquisition voltage, the second target multiple of the voltage transformer secondary side air switch lower end voltage, and the third target multiple of the voltage transformer secondary side air switch lower end voltage.

[0050] The second target multiplier may be a preset value greater than 1. The voltage at the lower end of the air switch on the secondary side of the voltage transformer may be a digital voltage signal at the lower end of the air switch connected to the secondary side of the voltage transformer. The third target multiplier may be a preset value greater than 0 and less than 1, different from the first target multiplier.

[0051] In an embodiment of the present invention, a second target multiple and a third target multiple can be set in advance, and the product of the second target multiple and the voltage at the lower end of the secondary side air switch of the voltage transformer, as well as the product of the third target multiple and the voltage at the lower end of the secondary side air switch of the voltage transformer are calculated. Then, the secondary side metering acquisition voltage of the line is compared with the voltage at the lower end of the secondary side air switch of the voltage transformer of the second target multiple and the voltage at the lower end of the secondary side air switch of the voltage transformer of the third target multiple, respectively, to distinguish the secondary side metering circuit fault of the line in the secondary side fault type, and the second target multiple can be used to calculate the product of the second target multiple and the voltage at the lower end of the secondary side air switch of the voltage transformer. The secondary measurement and control and main protection collected voltages are compared with the voltage at the lower end of the secondary side air switch of the voltage transformer at the second target multiple, and the voltage at the lower end of the secondary side air switch of the voltage transformer at the third target multiple, to identify the secondary measurement and control and main protection circuit faults in the secondary side fault type. The main second protection collected voltage can also be compared with the voltage at the lower end of the secondary side air switch of the voltage transformer at the second target multiple, and the voltage at the lower end of the secondary side air switch of the voltage transformer at the third target multiple, to identify the main second protection circuit faults in the secondary side fault type.

[0052] In an optional embodiment of the present invention, identifying a primary side winding fault based on the voltage conversion signal at the upper end of the voltage transformer secondary side air switch and the voltage transformer secondary side phase voltage rated value in the digital voltage conversion signal may include: determining a primary side winding fault of a target winding based on a target voltage conversion signal in the voltage conversion signal at the upper end of the voltage transformer secondary side air switch that is less than a second target multiple of the voltage transformer secondary side phase voltage rated value; identifying a primary side voltage loss fault based on the voltage conversion signal at the upper end of the voltage transformer secondary side air switch, an open triangle voltage conversion signal in the digital voltage conversion signal, and the voltage transformer secondary side phase voltage rated value may include: determining a primary side voltage loss fault of a target phase based on the same phase voltage when the open triangle voltage conversion signal is greater than zero and the same-phase voltage in the voltage conversion signal at the upper end of the voltage transformer secondary side air switch is less than a second target multiple of the voltage transformer secondary side phase voltage rated value.

[0053] The target voltage conversion signal may be a voltage conversion signal of the upper terminal of the secondary air switch of the voltage transformer, which is a voltage transformer secondary phase voltage rating that is less than the second target multiple. The target winding may be the winding of the voltage transformer experiencing a primary winding fault. The target phase may be the phase of the voltage transformer experiencing a primary voltage dropout fault.

[0054] In an embodiment of the present invention, the voltage conversion signal at the upper end of the secondary side air switch of the voltage transformer can be compared with the rated value of the secondary side phase voltage of the voltage transformer of the second target multiple, and the target voltage conversion signal of the voltage conversion signal at the upper end of the secondary side air switch of the voltage transformer is determined to be less than the rated value of the secondary side phase voltage of the voltage transformer of the second target multiple, and then the target winding generating the target voltage conversion signal is obtained, so as to determine that the fault point where the primary side winding fault occurs is the target winding, and the voltage abnormal phase of the target winding is determined. It can also be judged whether the open triangle voltage conversion signal is greater than 0. When the open triangle voltage conversion signal is greater than zero, the voltage belonging to the same phase in the voltage conversion signal at the upper end of the secondary side air switch of the voltage transformer is obtained, and the same phase voltage in the voltage at the upper end of the secondary side air switch of the voltage transformer is compared with the rated value of the secondary side phase voltage of the voltage transformer of the second target multiple. If the same phase voltage in the voltage conversion signal at the upper end of the secondary side air switch of the voltage transformer is less than the rated value of the secondary side phase voltage of the voltage transformer of the second target multiple, the phase where the primary side voltage loss fault occurs is determined to be the target phase based on the target phase to which the same phase voltage belongs.

[0055] In an optional embodiment of the present invention, according to the line secondary side metering acquisition voltage, the voltage at the lower end of the secondary side air switch of the voltage transformer of the second target multiple, and the voltage at the lower end of the secondary side air switch of the voltage transformer of the third target multiple, identifying the line secondary side metering circuit fault, can include: when the line secondary side metering acquisition voltage is less than the voltage at the lower end of the secondary side air switch of the voltage transformer of the second target multiple, or is greater than the voltage at the lower end of the secondary side air switch of the voltage transformer of the third target multiple, determining the line secondary side metering circuit fault; according to the secondary measurement and control and main protection acquisition voltage, the voltage at the lower end of the secondary side air switch of the voltage transformer of the second target multiple, and the voltage at the lower end of the secondary side air switch of the voltage transformer of the third target multiple, identifying the secondary measurement and control circuit fault and the main one protection circuit fault, which may include: when the secondary measurement and control and main one protection acquisition voltage is less than the second target multiple of the voltage transformer secondary side air switch lower end voltage, or greater than the third target multiple of the voltage transformer secondary side air switch lower end voltage, determining the secondary measurement and control and main one protection circuit fault; according to the main two protection acquisition voltage, the voltage at the lower end of the voltage transformer secondary side air switch of the second target multiple, and the voltage at the lower end of the voltage transformer secondary side air switch of the third target multiple, identifying the main two protection circuit fault, which may include: when the main two protection acquisition voltage is less than the second target multiple of the voltage transformer secondary side air switch lower end voltage, or greater than the third target multiple of the voltage transformer secondary side air switch lower end voltage, determining the main two protection circuit fault.

[0056] In an embodiment of the present invention, if the secondary-side metering voltage collected by the line is less than the voltage at the lower end of the secondary-side air switch of the voltage transformer at a second target multiple, or if the secondary-side metering voltage collected by the line is greater than the voltage at the lower end of the secondary-side air switch of the voltage transformer at a third target multiple, a fault in the secondary-side metering circuit of the line can be determined. If the secondary measurement and control and main-first protection voltage collected by the line is less than the voltage at the lower end of the secondary-side air switch of the voltage transformer at a second target multiple, or if the secondary measurement and control and main-first protection voltage collected by the line is greater than the voltage at the lower end of the secondary-side air switch of the voltage transformer at a third target multiple, a fault in the secondary measurement and control and main-first protection circuit can be determined.

[0057] The technical solution of the embodiment of the present invention performs primary-side fault detection on the digital voltage conversion signal received from the first-type input port, and performs secondary-side fault detection on the digital signal to be analyzed received from each second-type input interface to obtain a detection result, and then sends the detection result to the detection result uploading module, that is, data used to distinguish faults on different sides are received separately through different interfaces, and fault inspection of the primary and secondary sides of the voltage transformer is performed through the data received by different interfaces. The side to which the fault belongs can be automatically and intelligently identified without manual work, which facilitates targeted fault detection. It solves the current problem of only being able to perform simple voltage anomaly identification on both sides of the voltage transformer and the time-consuming manual inspection of the voltage transformer fault. It can automatically and accurately lock the primary and secondary side fault points and improve the efficiency of identifying the primary and secondary side fault points.

[0058] Example 3

[0059] Figure 3 This is a voltage acquisition principle diagram of a fault point identification instrument provided by the third embodiment of the present invention. For the convenience of description, Figure 3 The medium voltage analog quantity acquisition module measures the voltage on the secondary side of the voltage transformer and acquires the analog voltage acquisition signal from the upper and lower ends of the air switch from left to right, and the corresponding digital voltage conversion signal is represented as U A1 、U A1 '、U B1 、U B1 '、U C1 、U C1 '; The digital voltage conversion signal corresponding to the analog voltage acquisition signal collected from left to right at the upper and lower ends of the voltage transformer secondary side main protection and measurement and control voltage acquisition air switch is represented as U A2 、U A2 '、U B2 、U B2 '、U C2 、U C2 '; The digital voltage conversion signal corresponding to the analog voltage acquisition signal collected from left to right at the upper and lower ends of the air switch on the secondary side of the voltage transformer is represented by UA3 、U A3 '、U B3 、U B3 '、U C3 、U C3 The open triangle voltage conversion signal collected by the voltage analog acquisition module is U L The voltage analog acquisition module collects the digital signals to be analyzed, and the status signals of the voltage transformer secondary side metering voltage acquisition air switch are represented from left to right as 1MCBa, 1MCBb and 1MCBc; the status signals of the voltage transformer secondary side main protection and measurement and control voltage acquisition air switch are represented from left to right as 2MCBa, 2MCBb and 2MCBc; the status signals of the voltage transformer secondary side main protection voltage acquisition air switch are represented from left to right as 3MCBa, 3MCBb and 3MCBc. The line secondary side metering acquisition voltage is represented as U 计A 、U 计B and U 计C The secondary measurement and control and main protection acquisition voltage is expressed as U 测A 、U 测B and U 测C The main and secondary protection acquisition voltage is expressed as U 主二A 、U 主二B and U 主二C Among them, the status signal of the voltage transformer secondary side air switch includes the status signal of the voltage transformer secondary side metering voltage acquisition air switch, the status signal of the voltage transformer secondary side main protection and measurement and control voltage acquisition air switch, and the status signal of the voltage transformer secondary side main protection voltage acquisition air switch. The basic principle of this instrument is: because the upper end of the voltage transformer secondary side metering voltage acquisition air switch is directly connected to the metering circuit winding of the voltage transformer secondary side, and the metering circuit winding is affected by the voltage transformer primary side winding, evaluating the voltage at the upper end of the voltage transformer secondary side metering voltage acquisition air switch can reflect whether there is a fault in the voltage transformer body (both the primary and secondary windings belong to the voltage transformer body). The lower end of the voltage transformer secondary side metering voltage acquisition air switch is connected to the metering secondary circuit, so evaluating the voltage at the lower end of the voltage transformer secondary side metering voltage acquisition air switch and the voltage collected by the meter can reflect whether there is a fault in the metering secondary circuit. The fault identification principle of the main protection and measurement and control winding and the secondary circuit, and the main protection winding and the secondary circuit is the same.

[0060] The primary side fault detection logic is as follows:

[0061] 1. When U A1 、U B1 、U C1 、U A2 、U B2 、U C2 、UA3 、U B3 、U C3 If the voltage transformer secondary side phase voltage rating is less than 0.3Un (the second target multiple), a corresponding winding phase fault warning is issued. A1 If U is less than 0.3Un, a metering circuit winding phase A fault warning will be issued. B2 If it is less than 0.3Un, a main protection and control winding B phase fault warning will be issued.

[0062] 2. U A1 、U A2 、U A3 At the same time, it is less than 0.3Un, and U L If it is greater than 0V, it is determined that there is a voltage loss fault in phase A of the voltage transformer, and a voltage loss warning for phase A of the voltage transformer is issued.

[0063] 3. U B1 、U B2 、U B3 At the same time, it is less than 0.3Un, and U L If it is greater than 0V, it is determined that there is a voltage loss fault in phase B of the voltage transformer, and a voltage loss warning for phase B of the voltage transformer is issued.

[0064] 4. U C1 、U C2 、U C3 At the same time, it is less than 0.3Un, and U L If it is greater than 0V, it is determined that there is a voltage loss fault in the voltage transformer C phase, and a voltage transformer C phase voltage loss warning is issued.

[0065] 5. U A1 、U B1 、U C1 、U A2 、U B2 、U C2 、U A3 、U B3 、U C3 At the same time, it is less than 0.3Un, and U L If it is equal to 0V, it is determined that there is a voltage loss fault in the three-phase voltage transformer, and a voltage transformer three-phase voltage loss warning is issued.

[0066] The primary side fault detection logic can be Figure 4 The hardware circuit shown is implemented.

[0067] in U A1 、U B1 、U C1 、U A2 、U B2 、U C2 、U A3 、U B3、U C3 If the voltage transformers are both greater than 0.8Un (the first target multiple of the secondary phase voltage rating of the voltage transformer), and 1MCBa, 1MCBb, 1MCBc, 2MCBa, 2MCBb, 2MCBc, 3MCBa, 3MCBb, and 3MCBc are not tripped, the secondary fault is detected using the following logic:

[0068] 1. (U 计A 、U 计B 、U 计C ) is less than 0.3*(U A1 '、U B1 '、U C1 '), or (U 计A 、U 计B 、U 计C ) is greater than 1.2*(U A1 '、U B1 '、U C1 '), it is determined that the secondary side metering circuit of the line is faulty. When comparing voltages, the corresponding comparisons should be made, such as U 计A with 0.3*U A1 'and 1.2*U A1 'Compare.

[0069] 2. (U 测A 、U 测B 、U 测C ) is less than 0.3*(U A1 '、U B1 '、U C1 '), or (U 测A 、U 测B 、U 测C ) is greater than 1.2*(U A1 '、U B1 '、U C1 '), then determine the secondary control and main protection circuit faults. When comparing voltages, the corresponding comparisons should be made, such as U 测A with 0.3*U A1 'and 1.2*U A1 'Compare.

[0070] 3. (U 主二A 、U 主二B 、U 主二C ) is less than 0.3*(U A1 '、U B1 '、U C1 '), or (U 主二A 、U 主二B 、U 主二C ) is greater than 1.2*(U A1 '、U B1 '、U C1'), then the main and secondary protection circuits are determined to be faulty. When comparing voltages, the corresponding comparisons should be made, such as U 主二A with 0.3*U A1 'and 1.2*U A1 'Compare.

[0071] The secondary side fault detection logic can be Figure 5 The hardware circuit shown is implemented.

[0072] Example 4

[0073] Figure 6 This is a structural diagram of a fault point identification device provided by the fourth embodiment of the present invention. Figure 6 As shown, the device includes a detection result acquisition module 310 and a data sending module 320, wherein:

[0074] A detection result acquisition module 310 is configured to perform primary-side fault detection on the digital voltage conversion signal received from the first-type input port, and perform secondary-side fault detection on the digital signals to be analyzed received from each second-type input port, to obtain a detection result;

[0075] The data sending module 320 is used to send the detection results to the detection result uploading module.

[0076] The technical solution of the embodiment of the present invention performs primary-side fault detection on the digital voltage conversion signal received from the first-type input port, and performs secondary-side fault detection on the digital signal to be analyzed received from each second-type input interface to obtain a detection result, and then sends the detection result to the detection result uploading module, that is, data used to distinguish faults on different sides are received separately through different interfaces, and fault inspection of the primary and secondary sides of the voltage transformer is performed through the data received by different interfaces. The side to which the fault belongs can be automatically and intelligently identified without manual work, which facilitates targeted fault detection. It solves the current problem of only being able to perform simple voltage anomaly identification on both sides of the voltage transformer and the time-consuming manual inspection of the voltage transformer fault. It can automatically and accurately lock the primary and secondary side fault points and improve the efficiency of identifying the primary and secondary side fault points.

[0077] Optionally, the detection result acquisition module 310 is used to obtain the rated value of the secondary side phase voltage of the voltage transformer; identify the primary side winding fault based on the voltage conversion signal at the upper end of the secondary side air switch of the voltage transformer in the digital voltage conversion signal and the rated value of the secondary side phase voltage of the voltage transformer; identify the primary side voltage loss fault based on the voltage conversion signal at the upper end of the secondary side air switch of the voltage transformer, the open triangle voltage conversion signal in the digital voltage conversion signal, and the rated value of the secondary side phase voltage of the voltage transformer.

[0078] Optionally, the detection result acquisition module 310 is used to obtain the voltage transformer secondary side air switch status signal in the digital signal to be analyzed when the voltage conversion signal at the upper end of the voltage transformer secondary side air switch is greater than the voltage transformer secondary side phase voltage rated value of the first target multiple; when the voltage transformer secondary side air switch status signal is not tripped, the secondary side fault type is identified based on the line secondary side metering acquisition voltage, secondary measurement and control and main one protection acquisition voltage, and main two protection acquisition voltage in the digital signal to be analyzed.

[0079] Optionally, the detection result acquisition module 310 is used to identify the secondary side metering circuit fault of the line based on the secondary side metering acquisition voltage of the line, the lower end voltage of the secondary side air switch of the voltage transformer with the second target multiple, and the lower end voltage of the secondary side air switch of the voltage transformer with the third target multiple; identify the secondary measurement and control and main protection circuit fault based on the secondary measurement and control and main protection acquisition voltage, the lower end voltage of the secondary side air switch of the voltage transformer with the second target multiple, and the lower end voltage of the secondary side air switch of the voltage transformer with the third target multiple; identify the main two protection circuit fault based on the main two protection acquisition voltage, the lower end voltage of the secondary side air switch of the voltage transformer with the second target multiple, and the lower end voltage of the secondary side air switch of the voltage transformer with the third target multiple.

[0080] Optionally, the detection result acquisition module 310 is used to determine the primary side winding fault of the target winding based on the target voltage conversion signal in the voltage conversion signal at the upper end of the voltage transformer secondary side air switch, which is less than the second target multiple of the voltage transformer secondary side phase voltage rated value; when the open triangle voltage conversion signal is greater than zero and the same-phase voltage in the voltage conversion signal at the upper end of the voltage transformer secondary side air switch is less than the second target multiple of the voltage transformer secondary side phase voltage rated value, the primary side voltage loss fault of the target phase is determined based on the same-phase voltage.

[0081] Optionally, the detection result acquisition module 310 is used to determine the fault of the secondary side metering circuit of the line when the secondary side metering acquisition voltage of the line is less than the second target multiple of the voltage transformer secondary side air switch lower end voltage, or greater than the third target multiple of the voltage transformer secondary side air switch lower end voltage; determine the fault of the secondary measurement and control and main protection circuit when the secondary measurement and control and main protection acquisition voltage is less than the second target multiple of the voltage transformer secondary side air switch lower end voltage, or greater than the third target multiple of the voltage transformer secondary side air switch lower end voltage; determine the fault of the main two protection circuit when the main two protection acquisition voltage is less than the second target multiple of the voltage transformer secondary side air switch lower end voltage, or greater than the third target multiple of the voltage transformer secondary side air switch lower end voltage.

[0082] The fault point identification device provided in the embodiment of the present invention can execute the fault point identification method provided in any embodiment of the present invention, and has the corresponding functional modules and beneficial effects of the execution method.

[0083] Example 5

[0084] Figure 7 A schematic diagram of the structure of an electronic device that can be used to implement an embodiment of the present invention is shown. The electronic device is intended to represent various forms of digital computers, such as laptop computers, desktop computers, workstations, personal digital assistants, servers, blade servers, mainframe computers, and other suitable computers. The electronic device can also represent various forms of mobile devices, such as personal digital processing, cellular phones, smart phones, wearable devices (such as helmets, glasses, watches, etc.) and other similar computing devices. The components shown herein, their connections and relationships, and their functions are merely examples and are not intended to limit the implementation of the present invention described and / or required herein.

[0085] like Figure 7 As shown, the electronic device 10 includes at least one processor 11 and a memory, such as a read-only memory (ROM) 12, a random access memory (RAM) 13, etc., which is communicatively connected to the at least one processor 11. The memory stores a computer program that can be executed by the at least one processor. The processor 11 can perform various appropriate actions and processes according to the computer program stored in the read-only memory (ROM) 12 or the computer program loaded from the storage unit 18 into the random access memory (RAM) 13. Various programs and data required for the operation of the electronic device 10 can also be stored in the RAM 13. The processor 11, ROM 12, and RAM 13 are connected to each other via a bus 14. An input / output (I / O) interface 15 is also connected to the bus 14.

[0086] Multiple components in the electronic device 10 are connected to the I / O interface 15, including an input unit 16, such as a keyboard, a mouse, etc.; an output unit 17, such as various types of displays, speakers, etc.; a storage unit 18, such as a magnetic disk, an optical disk, etc.; and a communication unit 19, such as a network card, a modem, a wireless communication transceiver, etc. The communication unit 19 allows the electronic device 10 to exchange information / data with other devices via a computer network such as the Internet and / or various telecommunication networks.

[0087] The processor 11 can be any general-purpose and / or specialized processing component with processing and computing capabilities. Some examples of the processor 11 include, but are not limited to, a central processing unit (CPU), a graphics processing unit (GPU), various specialized artificial intelligence (AI) computing chips, various processors running machine learning model algorithms, a digital signal processor (DSP), and any other suitable processor, controller, microcontroller, etc. The processor 11 executes the various methods and processes described above, such as the fault point identification method.

[0088] In some embodiments, the fault point identification method can be implemented as a computer program tangibly embodied in a computer-readable storage medium, such as storage unit 18. In some embodiments, part or all of the computer program can be loaded and / or installed on electronic device 10 via ROM 12 and / or communication unit 19. When the computer program is loaded into RAM 13 and executed by processor 11, one or more steps of the fault point identification method described above can be performed. Alternatively, in other embodiments, processor 11 can be configured to perform the fault point identification method in any other appropriate manner (e.g., via firmware).

[0089] Various embodiments of the systems and techniques described herein can be implemented in digital electronic circuit systems, integrated circuit systems, field programmable gate arrays (FPGAs), application specific integrated circuits (ASICs), application specific standard products (ASSPs), system-on-chip systems (SOCs), programmable logic devices (CPLDs), computer hardware, firmware, software, and / or combinations thereof. These various embodiments can include being implemented in one or more computer programs that are executable and / or interpreted on a programmable system that includes at least one programmable processor, which can be a special purpose or general purpose programmable processor that can receive data and instructions from a storage system, at least one input device, and at least one output device, and transmit data and instructions to the storage system, the at least one input device, and the at least one output device.

[0090] Computer programs for implementing the methods of the present invention may be written in any combination of one or more programming languages. These computer programs may be provided to a processor of a general-purpose computer, a special-purpose computer, or other programmable data processing device, such that when the computer program is executed by the processor, the functions / operations specified in the flowcharts and / or block diagrams are implemented. The computer program may be executed entirely on the machine, partially on the machine, as a stand-alone software package, partially on the machine and partially on a remote machine, or entirely on a remote machine or server.

[0091] In the context of the present invention, computer-readable storage media can be tangible media that can contain or store a computer program for use with an instruction execution system, device or equipment or used in combination with an instruction execution system, device or equipment. Computer-readable storage media can include but are not limited to electronic, magnetic, optical, electromagnetic, infrared or semiconductor systems, devices or equipment, or any suitable combination of the foregoing. Alternatively, computer-readable storage media can be machine-readable signal media. More specific examples of machine-readable storage media can include electrical connections based on one or more lines, portable computer disks, hard disks, random access memories (RAM), read-only memories (ROM), erasable programmable read-only memories (EPROM or flash memory), optical fibers, portable compact disk read-only memories (CD-ROM), optical storage devices, magnetic storage devices, or any suitable combination of the foregoing.

[0092] To provide interaction with a user, the systems and techniques described herein can be implemented on an electronic device having: a display device (e.g., a CRT (cathode ray tube) or LCD (liquid crystal display) monitor) for displaying information to the user; and a keyboard and pointing device (e.g., a mouse or trackball) through which the user can provide input to the electronic device. Other types of devices can also be used to provide interaction with the user; for example, the feedback provided to the user can be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user can be received in any form (including acoustic input, voice input, or tactile input).

[0093] The systems and techniques described herein can be implemented in a computing system that includes back-end components (e.g., as a data server), or a computing system that includes middleware components (e.g., an application server), or a computing system that includes front-end components (e.g., a user computer with a graphical user interface or web browser through which a user can interact with implementations of the systems and techniques described herein), or a computing system that includes any combination of such back-end components, middleware components, or front-end components. The components of the system can be interconnected by any form or medium of digital data communication (e.g., a communication network). Examples of communication networks include: a local area network (LAN), a wide area network (WAN), a blockchain network, and the Internet.

[0094] A computing system may include clients and servers. The clients and servers are typically remote from each other and typically interact via a communication network. This client-server relationship arises through computer programs running on the respective computers, creating a client-server relationship. The server may be a cloud server, also known as a cloud computing server or cloud host. This server is a hosting product within the cloud computing service ecosystem that addresses the management difficulties and limited scalability of traditional physical hosting and VPS services.

[0095] It should be understood that the various forms of the processes shown above can be used to reorder, add, or delete steps. For example, the steps described in the present invention can be performed in parallel, sequentially, or in a different order, as long as the desired results of the technical solution of the present invention can be achieved. This is not limited herein.

[0096] The above specific embodiments do not limit the scope of protection of the present invention. Those skilled in the art will appreciate that various modifications, combinations, sub-combinations, and substitutions may be made based on design requirements and other factors. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention are intended to be included within the scope of protection of the present invention.

Claims

1. A fault point identification instrument, characterized in that: It includes voltage analog quantity acquisition module, data processing module and detection result sending module; The voltage analog quantity acquisition module includes a plurality of analog voltage acquisition ports and at least one digital voltage output port; The voltage analog quantity acquisition module is used to obtain analog voltage acquisition signals from multiple test points on the secondary side of the voltage transformer through each analog voltage acquisition port; after converting each analog voltage acquisition signal into a digital voltage conversion signal, the digital voltage conversion signal is sent to the first type input port of the data processing module through the digital voltage output port; The data processing module is used to perform primary-side fault detection on the digital voltage conversion signal received from the first-type input port, and perform secondary-side fault detection on the digital signal to be analyzed received from each second-type input interface, to obtain detection results; and send the detection results to the detection result uploading module; The test result sending module is used to remotely send the received test results to the substation backend system; The primary side fault detection of the digital voltage conversion signal received from the first type input port includes: obtaining the rated value of the secondary side phase voltage of the voltage transformer; identifying the primary side winding fault according to the voltage conversion signal of the upper end of the secondary side air switch of the voltage transformer in the digital voltage conversion signal and the rated value of the secondary side phase voltage of the voltage transformer; identifying the primary side voltage loss fault according to the voltage conversion signal of the upper end of the secondary side air switch of the voltage transformer, the open triangle voltage conversion signal in the digital voltage conversion signal, and the rated value of the secondary side phase voltage of the voltage transformer; The secondary side fault detection is performed on the digital signal to be analyzed received from each second-type input interface, including: when the voltage conversion signal at the upper end of the air switch on the secondary side of the voltage transformer is greater than the secondary side phase voltage rated value of the voltage transformer by a first target multiple, obtaining the secondary side air switch status signal of the voltage transformer in the digital signal to be analyzed; when the secondary side air switch status signal of the voltage transformer is not tripped, identifying the secondary side fault type based on the secondary side metering acquisition voltage of the line, the secondary measurement and control and main protection acquisition voltage, and the main protection acquisition voltage in the digital signal to be analyzed.

2. A fault point identification method, characterized in that: Executed by the data processing module in the fault point identification instrument, including: Performing primary-side fault detection on the digital voltage conversion signal received from the first-type input port, and performing secondary-side fault detection on the digital signal to be analyzed received from each second-type input interface, to obtain a detection result; Send the test results to the test result uploading module; The primary side fault detection of the digital voltage conversion signal received from the first type input port includes: obtaining the rated value of the secondary side phase voltage of the voltage transformer; identifying the primary side winding fault according to the voltage conversion signal of the upper end of the secondary side air switch of the voltage transformer in the digital voltage conversion signal and the rated value of the secondary side phase voltage of the voltage transformer; identifying the primary side voltage loss fault according to the voltage conversion signal of the upper end of the secondary side air switch of the voltage transformer, the open triangle voltage conversion signal in the digital voltage conversion signal, and the rated value of the secondary side phase voltage of the voltage transformer; The secondary side fault detection is performed on the digital signal to be analyzed received from each second-type input interface, including: when the voltage conversion signal at the upper end of the air switch on the secondary side of the voltage transformer is greater than the secondary side phase voltage rated value of the voltage transformer by a first target multiple, obtaining the secondary side air switch status signal of the voltage transformer in the digital signal to be analyzed; when the secondary side air switch status signal of the voltage transformer is not tripped, identifying the secondary side fault type based on the secondary side metering acquisition voltage of the line, the secondary measurement and control and main protection acquisition voltage, and the main protection acquisition voltage in the digital signal to be analyzed.

3. The method according to claim 2, characterized in that The identifying of the secondary side fault type according to the secondary side metering collected voltage, the secondary measurement and control and primary protection collected voltage, and the primary protection collected voltage in the digital signal to be analyzed includes: Identify a fault in a metering circuit on the secondary side of the line according to the metering collected voltage on the secondary side of the line, a voltage at the lower end of the air switch on the secondary side of the voltage transformer of a second target multiple, and a voltage at the lower end of the air switch on the secondary side of the voltage transformer of a third target multiple; Identify secondary measurement and control and main protection circuit faults according to the secondary measurement and control and main protection collected voltage, the voltage at the lower end of the secondary side air switch of the voltage transformer of the second target multiple, and the voltage at the lower end of the secondary side air switch of the voltage transformer of the third target multiple; The main-second protection circuit fault is identified based on the main-second protection acquisition voltage, the second target multiple voltage of the voltage transformer secondary side air switch lower end voltage, and the third target multiple voltage of the voltage transformer secondary side air switch lower end voltage.

4. The method according to claim 2, characterized in that The identifying of a primary side winding fault according to a voltage conversion signal of an upper terminal of a secondary side air switch of a voltage transformer and a rated value of a secondary side phase voltage of the voltage transformer in the digital voltage conversion signal includes: Determining a primary winding fault of a target winding according to a target voltage conversion signal of a voltage transformer secondary side phase voltage rating that is less than a second target multiple in the voltage conversion signal of the upper end of the air switch on the secondary side of the voltage transformer; The method of identifying a primary side voltage loss fault according to the voltage conversion signal of the upper end of the air switch on the secondary side of the voltage transformer, the open triangle voltage conversion signal in the digital voltage conversion signal, and the rated value of the secondary side phase voltage of the voltage transformer includes: When the open triangle voltage conversion signal is greater than zero and the same-phase voltage in the voltage conversion signal at the upper end of the air switch on the secondary side of the voltage transformer is less than the second target multiple of the rated value of the secondary side phase voltage of the voltage transformer, the primary side voltage loss fault of the target phase is determined based on the same-phase voltage.

5. The method according to claim 3, characterized in that: The method of identifying a fault in a secondary-side metering circuit of a line according to the metered collected voltage on the secondary side of the line, a voltage at the lower end of a secondary-side air switch of a voltage transformer of a second target multiple, and a voltage at the lower end of a secondary-side air switch of a voltage transformer of a third target multiple, includes: When the metering collected voltage on the secondary side of the line is less than the voltage at the lower end of the secondary side air switch of the voltage transformer by a second target multiple, or is greater than the voltage at the lower end of the secondary side air switch of the voltage transformer by a third target multiple, it is determined that the metering circuit on the secondary side of the line is faulty; The identifying of a secondary measurement and control and main protection circuit fault according to the secondary measurement and control and main protection collected voltage, the voltage at the lower end of the secondary side air switch of the voltage transformer of the second target multiple, and the voltage at the lower end of the secondary side air switch of the voltage transformer of the third target multiple includes: When the secondary measurement and control and main protection acquisition voltage is less than the voltage at the lower end of the secondary side air switch of the voltage transformer by the second target multiple, or is greater than the voltage at the lower end of the secondary side air switch of the voltage transformer by the third target multiple, it is determined that the secondary measurement and control and main protection circuit is faulty; The identifying of a main-second protection circuit fault according to the main-second protection acquisition voltage, the voltage at the lower end of the secondary-side air switch of the voltage transformer of the second target multiple, and the voltage at the lower end of the secondary-side air switch of the voltage transformer of the third target multiple includes: When the main-second protection acquisition voltage is less than the second target multiple of the voltage transformer secondary side air switch lower end voltage, or greater than the third target multiple of the voltage transformer secondary side air switch lower end voltage, it is determined that the main-second protection circuit is faulty.

6. A fault point identification device, characterized in that: The data processing module configured in the fault point identification instrument includes: a detection result acquisition module, configured to perform primary-side fault detection on the digital voltage conversion signal received from the first-type input port, and perform secondary-side fault detection on the digital signal to be analyzed received from each second-type input interface, to obtain a detection result; The data sending module is used to send the test results to the test result sending module; A detection result acquisition module is used to obtain the rated value of the secondary side phase voltage of the voltage transformer; identify the primary side winding fault according to the voltage conversion signal of the upper end of the secondary side air switch of the voltage transformer in the digital voltage conversion signal and the rated value of the secondary side phase voltage of the voltage transformer; identify the primary side voltage loss fault according to the voltage conversion signal of the upper end of the secondary side air switch of the voltage transformer, the open triangle voltage conversion signal in the digital voltage conversion signal, and the rated value of the secondary side phase voltage of the voltage transformer; When the voltage conversion signal at the upper end of the air switch on the secondary side of the voltage transformer is greater than the first target multiple of the rated value of the secondary side phase voltage of the voltage transformer, the status signal of the secondary side air switch of the voltage transformer in the digital signal to be analyzed is obtained; when the status signal of the secondary side air switch of the voltage transformer is not tripped, the secondary side fault type is identified based on the secondary side metering acquisition voltage, secondary measurement and control and main protection acquisition voltage, and main protection acquisition voltage in the digital signal to be analyzed.

7. An electronic device, characterized in that: The electronic device comprises: at least one processor; and a memory communicatively connected to the at least one processor; wherein, The memory stores a computer program executable by the at least one processor. The computer program is executed by the at least one processor to enable the at least one processor to perform the fault point identification method according to any one of claims 2 to 5.

8. A computer-readable storage medium, characterized in that The computer-readable storage medium stores computer instructions, and the computer instructions are used to enable a processor to implement the fault point identification method according to any one of claims 2 to 5 when executed.

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