Current transformer, current measurement method, related equipment and program product

Abstract

The embodiment of the invention relates to the technical field of current transformers, and discloses a current transformer, a current measurement method, related equipment and a program product. The current transformer comprises a control module, a compensation ring and an optical fiber sensing ring, the optical fiber sensing ring comprises a sensing optical fiber, and a conductor to be measured penetrates through the optical fiber sensing ring; the compensation ring is composed of a sensing optical fiber wound in the ring and a compensation coil wound outside the ring, and the compensation ring is connected with the optical fiber sensing ring; the control module comprises an electronic unit and a current amplifier which are connected with each other, the electronic unit is respectively connected with the compensation ring and the optical fiber sensing ring, and the current amplifier is connected with the compensation ring through the compensation coil. According to the technical scheme of the embodiment of the invention, the current measurement precision is improved.

Description

Technical Field

[0001] The present application relates to the technical field of current transformers, and in particular to a current transformer and a current measurement method, related equipment and program products. Background Art

[0002] The all-optical current transformer is small in size, light in weight, has a simple insulation structure, and is free of problems such as magnetic saturation, ferromagnetic resonance, and secondary open circuit. It has good frequency characteristics and transient characteristics, a large dynamic range, and a fast response speed. It can measure AC and DC currents at the same time. The primary end is passive and has strong anti-electromagnetic interference capabilities. It is well adapted to the needs of the power system and has been increasingly used in UHV, especially DC transmission systems, in recent years.

[0003] Existing open-loop all-fiber current transformers mostly use trigonometric function settlement methods to convert Faraday magneto-optical phase and measured current. Although the nonlinear results of trigonometric functions can be linearly corrected through special algorithms, there are certain measurement range limits. At the same time, this correction also has certain limitations in accuracy considering the limit of FPGA data processing bits. Summary of the invention

[0004] One object of the present application is to provide a current transformer and a current measurement method, related equipment and program products, which are at least used to improve the accuracy of current measurement.

[0005] To achieve the above objectives, some embodiments of the present application provide the following aspects:

[0006] In a first aspect, some embodiments of the present application further provide a current transformer, the current transformer comprising: a control module, a compensation ring and an optical fiber sensor ring,

[0007] The optical fiber sensing ring comprises a sensing optical fiber, and the conductor to be measured passes through the optical fiber sensing ring;

[0008] The compensation ring is composed of a sensing optical fiber wound inside the ring and a compensation coil wound outside the ring, and the compensation ring is connected to the optical fiber sensing ring;

[0009] The control module includes an electronic unit and a current amplifier that are connected to each other. The electronic unit is connected to the compensation ring and the optical fiber sensing ring respectively. The current amplifier is connected to the compensation ring through the compensation coil. The electronic unit controls the magnitude of the current passing through the compensation coil through the current amplifier so that the Faraday phase shift generated on the compensation ring is equal to the Faraday phase shift of the optical fiber sensing ring, and the current in the conductor to be measured is converted according to the current of the current amplifier.

[0010] Furthermore, the sensing optical fiber of the compensation ring and the sensing optical fiber of the optical fiber sensing ring are the same optical fiber.

[0011] Furthermore, the electronic unit includes a light detector for monitoring the Faraday phase shift in the optical fiber sensing ring and the compensation ring, and generating a current control signal based on the difference in the monitored Faraday phase shift, and sending it to the current amplifier, which generates an amplified current based on the current control signal and provides it to the compensation ring.

[0012] In a second aspect, some embodiments of the present application further provide a current measurement method, which is applied to a current transformer as described in any one of the embodiments of the present application, and the method includes:

[0013] Monitoring Faraday phase shift in fiber optic sensing loops and compensation loops;

[0014] A current control signal is generated according to the difference of the monitored Faraday phase shift, and sent to a current amplifier, which generates an amplified current according to the current control signal and provides it to a compensation loop;

[0015] When the Faraday phase shift in the optical fiber sensing ring and the compensation ring is detected to be zero, the current in the conductor to be measured is converted according to the current of the current amplifier.

[0016] Further, converting the current in the conductor to be measured according to the current of the current amplifier includes:

[0017] According to the following formula, the current in the conductor to be measured is converted from the current of the current amplifier:

[0018]

[0019] Where M is the number of turns of the sensing fiber of the compensation loop, N is the number of turns of the compensation coil, i is the current of the current amplifier, and I is the current of the conductor to be measured.

[0020] In a third aspect, some embodiments of the present application further provide a current measuring device, which is applied to a current transformer as described in any one of the embodiments of the present application, and the device comprises:

[0021] A monitoring module for monitoring the Faraday phase shift in the optical fiber sensing ring and the compensation ring;

[0022] A signal generation module is used to generate a current control signal according to the difference of the monitored Faraday phase shift, and send it to the current amplifier, and the current amplifier generates an amplified current according to the current control signal and provides it to the compensation loop;

[0023] The current conversion module is used to convert the current in the conductor to be measured according to the current of the current amplifier when the Faraday phase shift in the optical fiber sensing ring and the compensation ring is detected to be zero.

[0024] Furthermore, the current conversion module is used for:

[0025] According to the following formula, the current in the conductor to be measured is converted from the current of the current amplifier:

[0026]

[0027] Where M is the number of turns of the sensing fiber of the compensation loop, N is the number of turns of the compensation coil, i is the current of the current amplifier, and I is the current of the conductor to be measured.

[0028] In a fourth aspect, some embodiments of the present application further provide an electronic device, the electronic device comprising:

[0029] one or more processors; and

[0030] A memory storing computer program instructions, wherein the computer program instructions, when executed, cause the processor to perform the steps of the method as described in any one of the embodiments of the present application.

[0031] In a fifth aspect, some embodiments of the present application further provide a computer-readable medium on which a computer program / instruction is stored, and when the computer program / instruction is executed by a processor, the steps of any one of the methods described in the embodiments of the present application are implemented.

[0032] In a sixth aspect, some embodiments of the present application further provide a computer program product, comprising a computer program / instruction, which, when executed by a processor, implements the steps of any one of the methods described in the embodiments of the present application.

[0033] Compared with the related art, the solution provided in the embodiment of the present application generates the same Faraday phase shift as the optical fiber sensing ring on the compensation ring, and cancels the Faraday phase shift detected by the system to zero, thereby reducing or even eliminating the ratio difference and angle difference in the traditional current transformer. Then, the actual current of the conductor under test in the optical fiber sensing ring is calculated according to a certain proportional relationship based on the current size on the compensation ring, thereby achieving high-precision and high-linearity current measurement.

[0034] By using the same type of optical fiber for the compensation ring and the optical fiber sensor ring, since the same type of optical fiber has the same principle of magneto-optical effect, is affected by temperature in the same environment, and has consistent nonlinear components, they can cancel each other out, thereby further improving the measurement accuracy. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] One or more embodiments are exemplarily described by pictures in the corresponding drawings, and these exemplified descriptions do not constitute limitations on the embodiments. Elements with the same reference numerals in the drawings represent similar elements, and unless otherwise stated, the figures in the drawings do not constitute proportional limitations.

[0036] Figure 1 A schematic diagram of a current transformer structure provided according to some embodiments of the present application;

[0037] Figure 2 A schematic diagram of a flow chart of a current measurement method provided according to some embodiments of the present application;

[0038] Figure 3 A schematic diagram of the structure of a current measuring device provided according to some embodiments of the present application;

[0039] Figure 4 This is a schematic diagram of the structure of an electronic device provided according to some embodiments of the present application. DETAILED DESCRIPTION

[0040] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0041] First embodiment

[0042] A first embodiment of the present application relates to a current transformer. Figure 1 Schematic diagram of a current transformer structure provided according to some embodiments of the present application, such as Figure 1 As shown, the current transformer includes: a control module 10, a compensation ring 20 and an optical fiber sensor ring 30,

[0043] The optical fiber sensing ring 10 includes a sensing optical fiber, and the conductor 40 to be measured passes through the optical fiber sensing ring 30;

[0044] The compensation ring 20 is composed of a sensing optical fiber 201 wound inside the ring and a compensation coil 202 wound outside the ring, and the compensation ring 20 is connected to the optical fiber sensing ring 30;

[0045] The control module 10 includes an electronic unit 101 and a current amplifier 102 that are connected to each other. The electronic unit 101 is connected to the compensation ring 20 and the optical fiber sensing ring 30 respectively. The current amplifier 102 is connected to the compensation ring 20 through the compensation coil 201. The electronic unit 101 controls the magnitude of the current passing through the compensation coil 201 through the current amplifier 102 so that the Faraday phase shift generated on the compensation ring 20 is equal to the Faraday phase shift of the optical fiber sensing ring 30, and the current in the conductor 40 to be measured is converted according to the current of the current amplifier 102.

[0046] To achieve closed-loop supplementation, the electronic unit includes a light detector for monitoring the Faraday phase shift in the optical fiber sensing ring and the compensation ring, and generating a current control signal based on the difference in the monitored Faraday phase shift, and sending it to the current amplifier, which generates an amplified current based on the current control signal and provides it to the compensation ring.

[0047] The technical solution of the embodiment of the present application adopts the design and compensation mechanism of adding a compensation loop and a current amplifier, so that the current transformer can reduce or even eliminate the ratio difference and angle difference existing in the traditional current transformer, thereby realizing high-precision and high-linearity current measurement.

[0048] In order to further improve the measurement accuracy, the sensing optical fiber of the compensation ring and the sensing optical fiber of the optical fiber sensing ring are the same optical fiber.

[0049] By using the same type of optical fiber for the compensation ring and the optical fiber sensor ring, since the same type of optical fiber has the same principle of magneto-optical effect, is affected by temperature in the same environment, and has consistent nonlinear components, they can cancel each other out, thereby further improving the measurement accuracy.

[0050] Second embodiment

[0051] A second embodiment of the present application relates to a current measurement method, which is applied to a current transformer as described in any one of the embodiments of the present application. Figure 2 FIG. 1 is a flow chart of a current measurement method provided according to some embodiments of the present application. Figure 2 As shown, the method includes:

[0052] S110, monitoring the Faraday phase shift in the optical fiber sensing ring and the compensation ring.

[0053] S120, generating a current control signal according to the monitored difference in Faraday phase shift, and sending the signal to a current amplifier, which generates an amplified current according to the current control signal and provides the amplified current to the compensation loop.

[0054] S130. When it is detected that the Faraday phase shift in the optical fiber sensing ring and the compensation ring is zero, the current in the conductor to be measured is converted according to the current of the current amplifier.

[0055] Specifically, converting the current in the conductor to be measured according to the current of the current amplifier includes:

[0056] According to the following formula, the current in the conductor to be measured is converted from the current of the current amplifier:

[0057]

[0058] Where M is the number of turns of the sensing fiber of the compensation loop, N is the number of turns of the compensation coil, i is the current of the current amplifier, and I is the current of the conductor to be measured.

[0059] The embodiment of the present application generates the same Faraday phase shift as the optical fiber sensing ring on the compensation ring, and cancels the Faraday phase shift detected by the system to zero, thereby reducing or even eliminating the ratio error and angle error in the traditional current transformer. Then, the actual current of the conductor under test in the optical fiber sensing ring is calculated according to a certain proportional relationship based on the current size on the compensation ring, thereby achieving high-precision and high-linearity current measurement.

[0060] Third embodiment

[0061] A third embodiment of the present application relates to a current measuring device, which is applied to a current transformer as described in any one of the embodiments of the present application. Figure 3 FIG. 1 is a schematic diagram of a current measuring device according to some embodiments of the present application. Figure 3 As shown, the device comprises:

[0062] A monitoring module 50, for monitoring the Faraday phase shift in the optical fiber sensing ring and the compensation ring;

[0063] A signal generating module 60 is used to generate a current control signal according to the difference of the monitored Faraday phase shift, and send it to the current amplifier, and the current amplifier generates an amplified current according to the current control signal and provides it to the compensation loop;

[0064] The current conversion module 70 is used to convert the current in the conductor to be measured according to the current of the current amplifier when the Faraday phase shift in the optical fiber sensing ring and the compensation ring is detected to be zero.

[0065] Furthermore, the current conversion module is used for:

[0066] According to the following formula, the current in the conductor to be measured is converted from the current of the current amplifier:

[0067]

[0068] Where M is the number of turns of the sensing fiber of the compensation loop, N is the number of turns of the compensation coil, i is the current of the current amplifier, and I is the current of the conductor to be measured.

[0069] The embodiment of the present application generates the same Faraday phase shift as the optical fiber sensing ring on the compensation ring, and cancels the Faraday phase shift detected by the system to zero, thereby reducing or even eliminating the ratio error and angle error in the traditional current transformer. Then, the actual current of the conductor under test in the optical fiber sensing ring is calculated according to a certain proportional relationship based on the current size on the compensation ring, thereby achieving high-precision and high-linearity current measurement.

[0070] The step division of the above methods is only for the purpose of clear description. When implemented, they can be combined into one step or some steps can be split and decomposed into multiple steps. As long as they include the same logical relationship, they are all within the scope of protection of this patent; adding insignificant modifications to the algorithm or process or introducing insignificant designs without changing the core design of the algorithm and process are all within the scope of protection of this patent.

[0071] In addition, some embodiments of the present application also provide an electronic device. The electronic device may be a digital computer in various forms, such as a laptop computer, a desktop computer, a workbench, a personal digital assistant, a server, a blade server, a mainframe computer, etc. The electronic device may also be a mobile device in various forms, such as a personal digital processing, a cellular phone, a smart phone, a wearable device, and other similar computing devices.

[0072] The electronic device includes: one or more processors; and a memory storing computer program instructions, wherein when the computer program instructions are executed, the processor executes the steps of the method provided in any one or more of the above embodiments. Figure 4 An exemplary structural diagram of the electronic device is disclosed. Figure 4As shown, the electronic device includes: one or more processors 1101, memory 1102, and interfaces for connecting various components, including high-speed interfaces and low-speed interfaces. The various components are connected to each other using different buses, and can be installed on a common mainboard or installed in other ways as needed. The processor can process instructions executed in the electronic device, including instructions stored in or on the memory to display the graphical information of the GUI on an external input / output device (such as a display device coupled to the interface). In some other embodiments, if necessary, multiple processors and / or multiple buses can be used together with multiple memories and multiple memories. Similarly, multiple electronic devices can be connected, and each device provides some necessary operations (for example, as a server array, a group of blade servers, or a multi-processor system). Among them, the components shown in this article, their connections and relationships, and their functions are only used as examples, and are not intended to limit the implementation of the present application described and / or required herein.

[0073] The electronic device may further include: an input device 1103 and an output device 1104. The processor 1101, the memory 1102, the input device 1103 and the output device 1104 may be connected via a bus or other means. Figure 4 The example of connecting through bus is taken in the following.

[0074] The input device 1103 can receive input digital or character information, and generate key signal input related to the user settings and function control of the electronic device, such as a touch screen, a keypad, a mouse, a track pad, a touch pad, an indicator bar, one or more mouse buttons, a trackball, a joystick and other input devices. The output device 1104 may include a display device, an auxiliary lighting device (e.g., an LED) and a tactile feedback device (e.g., a vibration motor), etc. The display device may include, but is not limited to, a liquid crystal display (LCD), a light emitting diode (LED) display and a plasma display. In some embodiments, the display device may be a touch screen.

[0075] To provide interaction with a user, the electronic device may be a computer. The computer has: 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 a pointing device (e.g., a mouse or a trackball), through which the user can provide input to the computer. Other types of devices may also be used to provide interaction with the user; for example, the feedback provided to the user may be any form of sensory feedback (e.g., visual feedback, auditory feedback, or tactile feedback); and input from the user may be received in any form (including acoustic input, voice input, or tactile input).

[0076] In the embodiments of the present application, a computer program / instruction is stored on a computer-readable medium, and when the computer program / instruction is executed by a processor, the steps of the method provided by any one or more of the above embodiments are implemented. The computer-readable medium may be included in the electronic device described in the above embodiments; or it may exist independently without being assembled into the device. The above computer-readable medium carries one or more computer-readable instructions.

[0077] The memory 1102 can be used as a non-transient computer-readable storage medium, which can be used to store non-transient software programs, non-transient computer executable programs and modules. The processor 1101 executes various functional applications and data processing of the server by running the non-transient software programs, instructions and modules stored in the memory 1102, so as to implement the program instructions / modules corresponding to the method provided by any one or more embodiments in the embodiments of the present application.

[0078] The memory 1102 may include a program storage area and a data storage area, wherein the program storage area may store an operating system, an application required for at least one function; the data storage area may store data created according to the use of the electronic device, etc. In addition, the memory 1102 may include a high-speed random access memory, and may also include a non-transient memory, such as at least one disk storage device, a flash memory device, or other non-transient solid-state storage device. In some embodiments, the memory 1102 may optionally include a memory remotely arranged relative to the processor 1101, and these remote memories may be connected to the electronic device via a network. Examples of the above-mentioned network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and combinations thereof.

[0079] It should be noted that the computer-readable medium described in the present application may be a computer-readable signal medium or a computer-readable storage medium or any combination of the above two. The computer-readable medium may be, for example, but not limited to, an electrical, magnetic, optical, electromagnetic, infrared or semiconductor system, device or device, or any combination of the above. More specific examples of computer-readable storage media may include, but are not limited to: an electrical connection with one or more wires, a portable computer disk, a hard disk, a random access memory (RAM), a read-only memory (ROM), an erasable programmable read-only memory (EPROM or flash memory), an optical fiber, a portable compact disk read-only memory (CD-ROM), an optical storage device, a magnetic storage device, or any suitable combination of the above. In the present application, a computer-readable medium may be any tangible medium containing or storing a program that can be used by or in combination with an instruction execution system, device or device.

[0080] Computer readable media include permanent and non-permanent, removable and non-removable media, and can be implemented by any method or technology to store information. Information can be computer readable instructions, data structures, modules of programs or other data. Examples of computer storage media include, but are not limited to, phase change memory (PRAM), static random access memory (SRAM), dynamic random access memory (DRAM), other types of random access memory (RAM), read-only memory (ROM), electrically erasable programmable read-only memory (EEPROM), flash memory or other memory technology, read-only compact disk (CD-ROM), digital versatile disk (DVD) or other optical storage, magnetic cassettes, magnetic tape disk storage or other magnetic storage devices or any other non-transmission medium that can be used to store information that can be accessed by a computing device.

[0081] Computer program code for performing the operations of the present application may be written in one or more programming languages ​​or a combination thereof, including object-oriented programming languages, such as Java, Smalltalk, C++, and conventional procedural programming languages, such as "C" language or similar programming languages. The program code may be executed entirely on the user's computer, partially on the user's computer, as an independent software package, partially on the user's computer and partially on a remote computer, or entirely on a remote computer or server. In the case of a remote computer, the remote computer may be connected to the user's computer via any type of network, including a local area network (LAN) or a wide area network (WAN), or may be connected to an external computer (e.g., using an Internet service provider to connect via the Internet).

[0082] In the above-described embodiments, it can be implemented in whole or in part by software, hardware, firmware or any combination thereof. For example, it can be implemented by using an application specific integrated circuit (ASIC), a general-purpose computer or any other similar hardware device. In certain embodiments, the software program of the present application can be executed by a processor to implement the above steps or functions. Similarly, the software program of the present application (including relevant data structures) can be stored in a computer-readable recording medium, for example, a RAM memory, a magnetic or optical drive or a floppy disk and similar devices. In addition, some steps or functions of the present application can be implemented by hardware, for example, as a circuit that cooperates with a processor to perform each step or function.

[0083] The computer program product provided in the embodiment of the present application includes one or more computer programs / instructions, and when the computer program / instructions are executed by the processor, the process or function described in the embodiment of the present application is generated in whole or in part. The computer may be a general-purpose computer, a special-purpose computer, a computer network, or other programmable devices. The computer instructions may be stored in a computer-readable storage medium, or transmitted from one computer-readable storage medium to another computer-readable storage medium, for example, the computer instructions may be transmitted from a website site, a computer, a server or a data center by wired (e.g., coaxial cable, optical fiber, digital subscriber line (DSL)) or wireless (e.g., infrared, wireless, microwave, etc.) mode to another website site, computer, server or data center. The computer-readable storage medium may be any available medium that a computer can access or a data storage device such as a server or a data center that includes one or more available media integrations. The available medium may be a magnetic medium, (e.g., a floppy disk, a hard disk, a tape), an optical medium (e.g., a DVD), or a semiconductor medium (e.g., a solid-state drive so lid state di sk (SSD)), etc.

[0084] The flow chart or block diagram in the accompanying drawings shows the possible architecture, function and operation of the equipment, method and computer program product according to various embodiments of the present application. In this regard, each box in the flow chart or block diagram can represent a module, a program segment or a part of a code, and the module, the program segment or a part of the code contains one or more executable instructions for realizing the specified logical function. It should also be noted that in some alternative implementations, the functions marked in the box can also occur in a different order from the order marked in the accompanying drawings. For example, two boxes represented in succession can actually be executed substantially in parallel, and they can sometimes be executed in the opposite order, depending on the functions involved. It should also be noted that each box in the block diagram and / or flow chart, and the combination of the boxes in the block diagram and / or flow chart can be implemented with a dedicated system for hardware that performs a specified function or operation, or can be implemented with a combination of dedicated hardware and computer instructions.

[0085] The scope of the present application is defined by the appended claims rather than the above description, and it is intended that all changes that fall within the meaning and scope of the equivalent elements of the claims are included in the present application. Any figure mark in the claims should not be regarded as limiting the claims involved. In addition, it is clear that the word "comprising" does not exclude other units or steps, and the singular does not exclude the plural. Multiple units or devices stated in the device claim may also be implemented by one unit or device through software or hardware. The words "first", "second", etc. are only used to distinguish the description, and do not indicate any particular order, nor can they be understood as indicating or implying relative importance.

[0086] The above is only a specific implementation of the present application, but the protection scope of the present application is not limited thereto. Any person skilled in the art can easily mention changes or substitutions within the technical scope disclosed in the present application, which should be included in the protection scope of the present application. Therefore, the protection scope of the present application should be based on the protection scope of the claims, and the above embodiments should be regarded as exemplary and non-restrictive.

Claims

1. A current transformer, characterized in that: The current transformer comprises: a control module, a compensation ring and an optical fiber sensing ring. The optical fiber sensing ring comprises a sensing optical fiber, and the conductor to be measured passes through the optical fiber sensing ring; The compensation ring is composed of a sensing optical fiber wound inside the ring and a compensation coil wound outside the ring, and the compensation ring is connected to the optical fiber sensing ring; The control module includes an electronic unit and a current amplifier that are connected to each other. The electronic unit is connected to the compensation ring and the optical fiber sensing ring respectively. The current amplifier is connected to the compensation ring through the compensation coil. The electronic unit controls the magnitude of the current passing through the compensation coil through the current amplifier so that the Faraday phase shift generated on the compensation ring is equal to the Faraday phase shift of the optical fiber sensing ring, and the current in the conductor to be measured is converted according to the current of the current amplifier.

2. The current transformer according to claim 1, characterized in that: The sensing optical fiber of the compensation ring and the sensing optical fiber of the optical fiber sensing ring are the same optical fiber.

3. The current transformer according to claim 1, characterized in that: The electronic unit includes a light detector for monitoring the Faraday phase shift in the optical fiber sensing ring and the compensation ring, and generating a current control signal according to the difference in the monitored Faraday phase shift, and sending the current control signal to the current amplifier, which generates an amplified current according to the current control signal and provides it to the compensation ring.

4. A current measurement method, applied to the current transformer as claimed in any one of claims 1-2, characterized in that: The method comprises: Monitoring Faraday phase shift in fiber optic sensing loops and compensation loops; A current control signal is generated according to the difference of the monitored Faraday phase shift, and sent to a current amplifier, which generates an amplified current according to the current control signal and provides it to a compensation loop; When the Faraday phase shift in the optical fiber sensing ring and the compensation ring is detected to be zero, the current in the conductor to be measured is converted according to the current of the current amplifier.

5. The method according to claim 4, characterized in that The step of converting the current in the conductor to be measured according to the current of the current amplifier comprises: According to the following formula, the current in the conductor to be measured is converted from the current of the current amplifier: Where M is the number of turns of the sensing fiber of the compensation loop, N is the number of turns of the compensation coil, i is the current of the current amplifier, and I is the current of the conductor to be measured.

6. A current measuring device, applied to the current transformer as claimed in any one of claims 1 to 2, characterized in that: The device comprises: A monitoring module for monitoring the Faraday phase shift in the optical fiber sensing ring and the compensation ring; A signal generation module is used to generate a current control signal according to the difference of the monitored Faraday phase shift, and send it to the current amplifier, and the current amplifier generates an amplified current according to the current control signal and provides it to the compensation loop; The current conversion module is used to convert the current in the conductor to be measured according to the current of the current amplifier when the Faraday phase shift in the optical fiber sensing ring and the compensation ring is detected to be zero.

7. The device according to claim 6, characterized in that The current conversion module is used for: According to the following formula, the current in the conductor to be measured is converted from the current of the current amplifier: Where M is the number of turns of the sensing fiber of the compensation loop, N is the number of turns of the compensation coil, i is the current of the current amplifier, and I is the current of the conductor to be measured.

8. An electronic device, characterized in that: The electronic device comprises: one or more processors; and A memory storing computer program instructions, which, when executed, cause the processor to perform the steps of the method as claimed in any one of claims 4 to 5.

9. A computer readable medium having a computer program / instructions stored thereon, characterized in that: When the computer program / instructions are executed by a processor, the steps of the method according to any one of claims 4 to 5 are implemented.

10. A computer program product comprising a computer program / instructions, characterized in that When the computer program / instructions are executed by a processor, the steps of the method described in any one of claims 4 to 5 are implemented.

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