Method and device for identifying broken line of PT line of feeder terminal, terminal and medium

Abstract

The invention provides a feeder terminal PT wire breakage identification system, method and device, a terminal and a medium. The system comprises a primary switch, a plurality of high-voltage CT sensors and a feeder terminal, the primary switch is used for controlling on-off of a power supply side circuit and a load side circuit; the high-voltage CT sensors are arranged on a power supply side and a load side and are used for acquiring the voltage of a power supply side line and the voltage of a load side line, respectively recording the voltage as a power supply side CT voltage and a load side CT voltage, and transmitting the power supply side CT voltage and the load side CT voltage to the feeder terminal; and the feeder terminal is connected with the power supply side circuit through the power supply side PT wire and connected with the load side circuit through the load side PT wire, and is used for acquiring the power supply side PT voltage and the load side PT voltage and judging whether the PT wire is broken or not according to the PT voltage and the CT voltage. According to the invention, when the line is no-load or the primary switch is switched off, whether the PT lines at the load side and the power supply side are broken or not is accurately determined.

Description

Technical Field

[0001] The present application belongs to the field of abnormality identification technology, and in particular, relates to a method, device, terminal and medium for identifying a PT line break at a feeder terminal. Background Art

[0002] In the power distribution network, the feeder terminal collects the PT voltage on the power supply side and the load side through the PT line. When the PT line is broken, the collected PT voltage is 0 V. The feeder terminal can also collect the closing and opening status (switch position) of the primary switch.

[0003] In the prior art, whether the PT line at the feeder terminal is broken is generally determined by detecting the three-phase current and the collected values ​​of the PT voltage on both sides and the switch position. However, this method has certain limitations. For example, when the line is unloaded (the collected values ​​of the PT voltage on the load side and the power supply side are both 0V) or the primary switch is in the open position (the collected values ​​of the PT voltage on the load side or the power supply side are 0V), it is impossible to determine whether the PT line on the load side and the power supply side is broken by conventional methods. Summary of the invention

[0004] The embodiments of the present application provide a method, device, terminal and medium for identifying a broken PT line at a feeder terminal, so as to accurately determine whether the PT line on the load side and the power supply side is broken when the line is unloaded (the PT voltage on the load side and the power supply side is 0V) or the primary switch is in the open position (the PT voltage on the load side or the power supply side is 0V).

[0005] This application is implemented through the following technical solutions:

[0006] In a first aspect, an embodiment of the present application provides a feeder terminal PT line break identification system, comprising: a primary switch, a plurality of high-voltage CT sensors and a feeder terminal.

[0007] A primary switch is used to control the on and off of the power supply side and load side lines.

[0008] The high-voltage CT sensor is arranged on the power supply side and the load side, and is used to obtain the voltage of the power supply side line and the voltage of the load side line, which are recorded as the power supply side CT voltage and the load side CT voltage respectively, and transmit the power supply side CT voltage and the load side CT voltage to the feeder terminal.

[0009] The feeder terminal is connected to the power supply side line through the power supply side PT line and is connected to the load side line through the load side PT line. It is used to obtain the power supply side PT voltage and the load side PT voltage, and is also used to determine whether the power supply side PT line and the load side PT line are broken based on the power supply side PT voltage, the load side PT voltage, the power supply side CT voltage and the load side CT voltage.

[0010] In combination with the first aspect, in some possible implementations, a high-voltage CT sensor is provided on each phase of the power supply side line, and a high-voltage CT sensor is provided on each phase of the load side line.

[0011] In combination with the first aspect, in some possible implementations, a 433M wireless communication module is provided in the high-voltage CT sensor, a 433M wireless communication module is provided in the feeder terminal, and a distance between the high-voltage CT sensor and the feeder terminal is within a preset threshold.

[0012] In a second aspect, an embodiment of the present application provides a method for identifying a broken PT line at a feeder terminal, comprising:

[0013] Obtain the power supply side PT voltage, load side PT voltage, power supply side CT voltage and load side CT voltage.

[0014] Based on the power supply side PT voltage and the power supply side CT voltage, it is determined whether the power supply side PT line is broken.

[0015] Based on the load-side PT voltage and the load-side CT voltage, determine whether the load-side PT line is broken.

[0016] In conjunction with the second aspect, in some possible implementations, judging whether the PT line on the power supply side is broken based on the PT voltage on the power supply side and the CT voltage on the power supply side includes:

[0017] If the PT voltage on the power supply side is different from the CT voltage on the power supply side, it is determined that the PT line on the power supply side is broken.

[0018] In conjunction with the second aspect, in some possible implementations, judging whether the load-side PT line is broken based on the load-side PT voltage and the load-side CT voltage includes:

[0019] If the load-side PT voltage is different from the load-side CT voltage, it is determined that the power-side PT line is broken.

[0020] In conjunction with the second aspect, in some possible implementations, the method further includes:

[0021] When the power supply side PT line is not broken, the power supply side PT voltage is corrected based on the power supply side CT voltage.

[0022] When the load-side PT line is not broken, the load-side PT voltage is corrected based on the load-side CT voltage.

[0023] In a second aspect, an embodiment of the present application provides a feeder terminal PT line disconnection identification device, comprising:

[0024] The data acquisition module is used to acquire the PT voltage on the power supply side, the PT voltage on the load side, the CT voltage on the power supply side and the CT voltage on the load side.

[0025] The first judgment module is used to judge whether the PT line on the power supply side is broken based on the PT voltage on the power supply side and the CT voltage on the power supply side.

[0026] The second judgment module is used to judge whether the load-side PT line is broken based on the load-side PT voltage and the load-side CT voltage.

[0027] In a third aspect, an embodiment of the present application provides a feeder terminal, comprising: a processor and a memory, the memory being used to store a computer program, and when the processor executes the computer program, a feeder terminal PT line break identification method as described in any one of the second aspects is implemented.

[0028] In a fourth aspect, an embodiment of the present application provides a computer-readable storage medium, wherein the computer-readable storage medium stores a computer program, and when the computer program is executed by a processor, the feeder terminal PT line break identification method as described in any one of the second aspects is implemented.

[0029] It can be understood that the beneficial effects of the second to fourth aspects mentioned above can be found in the relevant description of the first aspect mentioned above, and will not be repeated here.

[0030] Compared with the prior art, the embodiments of the present invention have the following beneficial effects:

[0031] The present application determines whether the PT line on the power supply side and the PT line on the load side are broken through the PT voltage on the power supply side, the PT voltage on the load side, the CT voltage on the power supply side and the CT voltage on the load side. This method can identify the broken line of the PT line when the line is unloaded (the PT voltages on the load side and the power supply side are both 0V) or the primary switch is in the open position (the PT voltage on the load side or the power supply side is 0V), which solves the limitations of the prior art and can more comprehensively determine whether the PT line is broken.

[0032] It is to be understood that the foregoing general description and the following detailed description are exemplary and explanatory only and are not restrictive of the present specification. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0034] Figure 1 It is a structural schematic diagram of a feeder terminal PT line break identification system provided by an embodiment of the present application;

[0035] Figure 2It is a flow chart of a method for identifying a broken PT line at a feeder terminal provided in an embodiment of the present application;

[0036] Figure 3 It is a structural schematic diagram of a feeder terminal PT line break identification device provided in an embodiment of the present application;

[0037] Figure 4 It is a structural diagram of a feeder terminal provided in one embodiment of the present application. DETAILED DESCRIPTION

[0038] In the following description, specific details such as specific system structures, technologies, etc. are provided for the purpose of illustration rather than limitation, so as to provide a thorough understanding of the embodiments of the present application. However, it should be clear to those skilled in the art that the present application may also be implemented in other embodiments without these specific details. In other cases, detailed descriptions of well-known systems, devices, circuits, and methods are omitted to prevent unnecessary details from obstructing the description of the present application.

[0039] It should be understood that when used in the present specification and the appended claims, the term "comprising" indicates the presence of described features, wholes, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or combinations thereof.

[0040] It should also be understood that the term “and / or” used in the specification and appended claims refers to any and all possible combinations of one or more of the associated listed items, and includes these combinations.

[0041] As used in the specification and appended claims of this application, the term "if" can be interpreted as "when" or "uponce" or "in response to determining" or "in response to detecting", depending on the context. Similarly, the phrase "if it is determined" or "if [described condition or event] is detected" can be interpreted as meaning "uponce it is determined" or "in response to determining" or "uponce [described condition or event] is detected" or "in response to detecting [described condition or event]", depending on the context.

[0042] In addition, in the description of the present application specification and the appended claims, the terms "first", "second", "third", etc. are only used to distinguish the descriptions and cannot be understood as indicating or implying relative importance.

[0043] References to "one embodiment" or "some embodiments" etc. described in the specification of this application mean that one or more embodiments of the present application include specific features, structures or characteristics described in conjunction with the embodiment. Therefore, the statements "in one embodiment", "in some embodiments", "in some other embodiments", "in some other embodiments", etc. that appear in different places in this specification do not necessarily refer to the same embodiment, but mean "one or more but not all embodiments", unless otherwise specifically emphasized in other ways. The terms "including", "comprising", "having" and their variations all mean "including but not limited to", unless otherwise specifically emphasized in other ways.

[0044] The present application provides a feeder terminal PT line break identification system. Figure 1 This is a schematic diagram of the structure of a feeder terminal PT line disconnection identification system provided by an embodiment of the present application, referring to Figure 1 The system is described in detail as follows:

[0045] A feeder terminal PT line break identification system includes: a primary switch 101, a plurality of high-voltage CT sensors 102 and a feeder terminal 103.

[0046] The primary switch 101 is used to control the on and off of the power supply side and load side lines.

[0047] The high-voltage CT sensor 102 is arranged on the power supply side and the load side, and is used to obtain the voltage of the power supply side line and the voltage of the load side line, which are recorded as the power supply side CT voltage and the load side CT voltage respectively, and transmit the power supply side CT voltage and the load side CT voltage to the feeder terminal 103.

[0048] The feeder terminal 103 is connected to the power supply side line through the power supply side PT line and is connected to the load side line through the load side PT line. It is used to obtain the power supply side PT voltage and the load side PT voltage, and is also used to determine whether the power supply side PT line and the load side PT line are broken based on the power supply side PT voltage, the load side PT voltage, the power supply side CT voltage and the load side CT voltage.

[0049] For example, Figure 1 The dotted line in the middle represents the PT line. The feeder terminal 103 collects the voltages of the load side and the power side lines through the PT line, which are recorded as the load side PT voltage and the power side PT voltage. When the PT line is broken, the corresponding indication of the feeder terminal 103 (the collected value of the PT voltage) is 0V.

[0050] Exemplarily, a high-voltage CT sensor 102 is provided on each phase of the power supply side line, and a high-voltage CT sensor 102 is provided on each phase of the load side line. The high-voltage CT sensor is similar to the acquisition unit of the fault indicator, with a small size, low cost, live loading and unloading, and can collect the voltage and current of the primary line, collect voltage by induction, collect current by Rogowski coil, have a backup power supply (3.6V battery), and have a magnetic ring for power collection.

[0051] Exemplarily, a 433M wireless communication module is provided in the high-voltage CT sensor 102, a 433M wireless communication module is provided in the feeder terminal 103, and the distance between the high-voltage CT sensor 102 and the feeder terminal 103 is within a preset threshold. The preset threshold may be 100 meters. The high-voltage CT sensor 102 and the feeder terminal 103 perform data exchange in real time by distinguishing channel frequencies through addresses.

[0052] The above-mentioned feeder terminal PT line break identification system determines whether the power supply side PT line and the load side PT line are broken through the power supply side PT voltage, the load side PT voltage, the power supply side CT voltage and the load side CT voltage. This method can realize PT line break identification when the line is unloaded (the PT voltages on the load side and the power supply side are both 0V) or the primary switch is in the open position (the PT voltage on the load side or the power supply side is 0V), which solves the limitations of the prior art and can more comprehensively determine whether the PT line is broken.

[0053] Figure 2 is a schematic diagram of the process of the feeder terminal PT line disconnection identification method provided in an embodiment of the present application, referring to Figure 2 The detailed description of the feeder terminal PT line disconnection identification method is as follows:

[0054] Step 201, obtaining the power supply side PT voltage, the load side PT voltage, the power supply side CT voltage and the load side CT voltage.

[0055] Step 202: Based on the power supply side PT voltage and the power supply side CT voltage, determine whether the power supply side PT line is broken.

[0056] Exemplarily, step 202 may include:

[0057] If the PT voltage on the power supply side is different from the CT voltage on the power supply side, it is determined that the PT line on the power supply side is broken.

[0058] Step 203: Based on the load-side PT voltage and the load-side CT voltage, determine whether the load-side PT line is broken.

[0059] Exemplarily, step 203 may include:

[0060] If the load-side PT voltage is different from the load-side CT voltage, it is determined that the power-side PT line is broken.

[0061] Exemplarily, the feeder terminal PT line disconnection identification method may also include:

[0062] When the power supply side PT line is not broken, the power supply side PT voltage is corrected based on the power supply side CT voltage.

[0063] When the load-side PT line is not broken, the load-side PT voltage is corrected based on the load-side CT voltage.

[0064] The above-mentioned feeder terminal PT line break identification method determines whether the power supply side PT line and the load side PT line are broken through the power supply side PT voltage, the load side PT voltage, the power supply side CT voltage and the load side CT voltage. This method can realize PT line break identification when the line is unloaded (the PT voltages on the load side and the power supply side are both 0V) or the primary switch is in the open position (the PT voltage on the load side or the power supply side is 0V), which solves the limitations of the prior art and can more comprehensively determine whether the PT line is broken.

[0065] It should be understood that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0066] Corresponding to the feeder terminal PT line disconnection identification method described in the above embodiment, Figure 3 A structural block diagram of a feeder terminal PT line break identification device provided in an embodiment of the present application is shown. For ease of explanation, only the parts related to the embodiment of the present application are shown.

[0067] See also Figure 3 The feeder terminal PT line disconnection identification device in the embodiment of the present application may include:

[0068] The data acquisition module 301 is used to acquire the power supply side PT voltage, the load side PT voltage, the power supply side CT voltage and the load side CT voltage.

[0069] The first judgment module 302 is used to judge whether the PT line on the power supply side is broken based on the PT voltage on the power supply side and the CT voltage on the power supply side.

[0070] The second judgment module 303 is used to judge whether the load-side PT line is broken based on the load-side PT voltage and the load-side CT voltage.

[0071] Exemplarily, the first determination module 302 may be used to:

[0072] If the PT voltage on the power supply side is different from the CT voltage on the power supply side, it is determined that the PT line on the power supply side is broken.

[0073] Exemplarily, the second determination module 303 may be used to:

[0074] If the load-side PT voltage is different from the load-side CT voltage, it is determined that the power-side PT line is broken.

[0075] Exemplarily, the second determination module 303 may also be used for:

[0076] When the power supply side PT line is not broken, the power supply side PT voltage is corrected based on the power supply side CT voltage.

[0077] When the load-side PT line is not broken, the load-side PT voltage is corrected based on the load-side CT voltage.

[0078] It should be noted that the information interaction, execution process, etc. between the above-mentioned devices / units are based on the same concept as the method embodiment of the present application. Their specific functions and technical effects can be found in the method embodiment part and will not be repeated here.

[0079] The technicians in the relevant field can clearly understand that for the convenience and simplicity of description, only the division of the above-mentioned functional units and modules is used as an example for illustration. In practical applications, the above-mentioned function allocation can be completed by different functional units and modules as needed, that is, the internal structure of the device can be divided into different functional units or modules to complete all or part of the functions described above. The functional units and modules in the embodiment can be integrated in a processing unit, or each unit can exist physically separately, or two or more units can be integrated in one unit. The above-mentioned integrated unit can be implemented in the form of hardware or in the form of software functional units. In addition, the specific names of the functional units and modules are only for the convenience of distinguishing each other, and are not used to limit the scope of protection of this application. The specific working process of the units and modules in the above-mentioned system can refer to the corresponding process in the aforementioned method embodiment, which will not be repeated here.

[0080] The present application also provides a feeder terminal. Figure 4 The feeder terminal 400 may include: at least one processor 410 and a memory 420, wherein the memory 420 is used to store a computer program 421, and the processor 410 is used to call and run the computer program 421 stored in the memory 420 to implement the steps in any of the above-mentioned method embodiments, for example Figure 2 Steps 201 to 203 in the illustrated embodiment. Alternatively, when the processor 410 executes the computer program, the functions of each module / unit in the above-mentioned device embodiments are implemented, for example Figure 3 The functions of each module are shown.

[0081] Exemplarily, the computer program 421 may be divided into one or more modules / units, one or more modules / units are stored in the memory 420, and are executed by the processor 410 to complete the present application. The one or more modules / units may be a series of computer program segments capable of completing specific functions, and the program segments are used to describe the execution process of the computer program in the feeder terminal 400.

[0082] Those skilled in the art will understand that Figure 4 It is only an example of a feeder terminal and does not constitute a limitation of the feeder terminal. It may include more or fewer components than shown in the figure, or a combination of certain components, or different components, such as input and output devices, network access devices, buses, etc.

[0083] The processor 410 may be a central processing unit (CPU), or other general-purpose processors, digital signal processors (DSP), application-specific integrated circuits (ASIC), field-programmable gate arrays (FPGA), or other programmable logic devices, discrete gate or transistor logic devices, discrete hardware components, etc. A general-purpose processor may be a microprocessor or any conventional processor, etc.

[0084] The memory 420 may be an internal storage unit of the feeder terminal, or an external storage device of the feeder terminal, such as a plug-in hard disk, a smart media card (SMC), a secure digital (SD) card, a flash card, etc. The memory 420 is used to store the computer program and other programs and data required by the feeder terminal. The memory 420 may also be used to temporarily store data that has been output or is to be output.

[0085] The bus may be an Industry Standard Architecture (ISA) bus, a Peripheral Component Interconnect (PCI) bus, or an Extended Industry Standard Architecture (EISA) bus, etc. The bus may be divided into an address bus, a data bus, a control bus, etc. For ease of representation, the bus in the drawings of the present application is not limited to only one bus or one type of bus.

[0086] The feeder terminal PT line break identification method provided in the embodiment of the present application can be applied to terminal devices such as computers, wearable devices, vehicle-mounted devices, tablet computers, laptops, netbooks, etc. The embodiment of the present application does not impose any restrictions on the specific type of terminal devices.

[0087] An embodiment of the present application further provides a computer-readable storage medium storing a computer program. When the computer program is executed by a processor, the steps in each embodiment of the above-mentioned feeder terminal PT line break identification method can be implemented.

[0088] An embodiment of the present application provides a computer program product. When the computer program product is run on a mobile terminal, the mobile terminal can implement the steps in each embodiment of the above-mentioned feeder terminal PT line break identification method when executing the computer program product.

[0089] If the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it can be stored in a computer-readable storage medium. Based on this understanding, the present application implements all or part of the processes in the above-mentioned embodiment method, which can be completed by instructing the relevant hardware through a computer program. The computer program can be stored in a computer-readable storage medium, and the computer program can implement the steps of the above-mentioned various method embodiments when executed by the processor. Among them, the computer program includes computer program code, and the computer program code can be in source code form, object code form, executable file or some intermediate form. The computer-readable medium may at least include: any entity or device that can carry the computer program code to the camera device / terminal device, recording medium, computer memory, read-only memory (ROM, Read-Only Memory), random access memory (RAM, Random Access Memory), electrical carrier signal, telecommunication signal and software distribution medium. For example, a USB flash drive, a mobile hard disk, a disk or an optical disk.

[0090] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described or recorded in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0091] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, or a combination of computer software and electronic hardware. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.

[0092] In the embodiments provided in the present application, it should be understood that the disclosed devices / network equipment and methods can be implemented in other ways. For example, the device / network equipment embodiments described above are merely schematic. For example, the division of the modules or units is only a logical function division. There may be other division methods in actual implementation, such as multiple units or components can be combined or integrated into another system, or some features can be ignored or not executed. Another point is that the mutual coupling or direct coupling or communication connection shown or discussed can be through some interfaces, indirect coupling or communication connection of devices or units, which can be electrical, mechanical or other forms.

[0093] The units described as separate components may or may not be physically separated, and the components shown as units may or may not be physical units, that is, they may be located in one place or distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the purpose of the solution of this embodiment.

[0094] The embodiments described above are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, a person skilled in the art should understand that the technical solutions described in the aforementioned embodiments may still be modified, or some of the technical features may be replaced by equivalents. Such modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application, and should all be included in the protection scope of the present application.

Claims

1. A feeder terminal PT line break identification system, characterized in that: include: Primary switch, multiple high voltage CT sensors and feeder terminals; The primary switch is used to control the on and off of the power supply side and load side lines; The high-voltage CT sensor is arranged on the power supply side and the load side, and is used to obtain the voltage of the power supply side line and the voltage of the load side line, which are recorded as the power supply side CT voltage and the load side CT voltage respectively, and transmit the power supply side CT voltage and the load side CT voltage to the feeder terminal; The feeder terminal is connected to the power side line through the power side PT line and connected to the load side line through the load side PT line, and is used to obtain the power side PT voltage and the load side PT voltage, and is also used to determine whether the power side PT line and the load side PT line are broken according to the power side PT voltage, the load side PT voltage, the power side CT voltage and the load side CT voltage.

2. The feeder terminal PT line break identification system according to claim 1, characterized in that: A high-voltage CT sensor is provided on each phase of the power supply side line, and a high-voltage CT sensor is provided on each phase of the load side line.

3. The feeder terminal PT line disconnection identification system according to claim 1, characterized in that: The high-voltage CT sensor is provided with a 433M wireless communication module, the feeder terminal is provided with a 433M wireless communication module, and the distance between the high-voltage CT sensor and the feeder terminal is within a preset threshold.

4. A method for identifying a broken PT line at a feeder terminal, characterized in that: Applied to the feeder terminal PT line disconnection identification system according to claim 1, the method comprises: Obtain the PT voltage on the power supply side, the PT voltage on the load side, the CT voltage on the power supply side, and the CT voltage on the load side; Based on the power supply side PT voltage and the power supply side CT voltage, determining whether the power supply side PT line is broken; Based on the load-side PT voltage and the load-side CT voltage, it is determined whether the load-side PT line is broken.

5. The feeder terminal PT line disconnection identification method according to claim 4, characterized in that: The determining whether the PT line on the power supply side is broken based on the PT voltage on the power supply side and the CT voltage on the power supply side includes: If the power supply side PT voltage is different from the power supply side CT voltage, it is determined that the power supply side PT line is broken.

6. The feeder terminal PT line disconnection identification method according to claim 4, characterized in that: The determining whether the load-side PT line is broken based on the load-side PT voltage and the load-side CT voltage includes: If the load-side PT voltage is different from the load-side CT voltage, it is determined that the power-side PT line is broken.

7. The feeder terminal PT line disconnection identification method according to claim 4, characterized in that: The method further comprises: When the PT line on the power supply side is not broken, the PT voltage on the power supply side is corrected based on the CT voltage on the power supply side; When the load-side PT line is not broken, the load-side PT voltage is corrected based on the load-side CT voltage.

8. A feeder terminal PT line break identification device, characterized in that: include: A data acquisition module is used to acquire the PT voltage on the power supply side, the PT voltage on the load side, the CT voltage on the power supply side, and the CT voltage on the load side; A first judgment module, used for judging whether the PT line on the power supply side is broken based on the PT voltage on the power supply side and the CT voltage on the power supply side; The second judgment module is used to judge whether the load-side PT line is broken based on the load-side PT voltage and the load-side CT voltage.

9. A feeder terminal, comprising: A processor and a memory, wherein the memory stores a computer program that can be run on the processor, and wherein when the processor executes the computer program, the feeder terminal PT line break identification method as described in any one of claims 4 to 7 is implemented.

10. A computer-readable storage medium storing a computer program, characterized in that: When the computer program is executed by a processor, the method for identifying a broken PT line at a feeder terminal as claimed in any one of claims 4 to 7 is implemented.

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