Optical fiber transmission system for electronic transformer

Abstract

The invention discloses an optical fiber transmission system for an electronic mutual inductor and a working method of the system during operation, and the optical fiber transmission system for the electronic mutual inductor ingeniously integrates a laser energy supply link and a multi-path communication link through a multi-core photonic crystal fiber with a specially designed internal structure. A more concise, economical and reliable photoelectric integrated connection scheme is provided for the electronic transformer; physical connection between the high-voltage unit and the low-voltage unit of the electronic transformer is simplified, and system complexity, cost and failure rate are reduced on the premise that energy supply efficiency and communication quality are guaranteed.

Description

Technical Field

[0001] This invention relates to the field of electronic instrument transformer technology, and in particular to an optical fiber transmission system for electronic instrument transformers. Background Technology

[0002] Electronic instrument transformers are key sensing devices in smart grids. Their high-voltage side acquisition units require energy to operate and reliably transmit digital measurement signals to the low-voltage side merging unit. To achieve electrical isolation between the high-voltage and low-voltage sides, optical fibers are typically used for energy supply and signal transmission.

[0003] In existing technologies, laser power supply systems typically employ independent fiber optic links. Specifically, a single power fiber (large core diameter) transmits laser energy, while data signals are transmitted via one or more communication fibers. While this separate approach achieves the desired functionality, it presents several inherent problems: First, it requires laying at least two independent fiber optic cables, increasing the system's physical complexity and installation difficulty, especially in space-constrained or environmentally complex substation sites. Second, using multiple cables and corresponding fiber optic connectors increases the overall system cost and potential points of failure, reducing long-term operational reliability. Finally, managing and maintaining multiple cables is more cumbersome. Summary of the Invention

[0004] This invention aims to address at least one of the technical problems existing in the prior art. To this end, this invention proposes a fusion method for dynamic measurement uncertainty assessment, which addresses the shortcomings of previous methods such as excessively high data requirements and limited functionality, thereby better adapting to different needs and achieving more accurate uncertainty assessment.

[0005] The present invention also proposes a system with the above-mentioned fusion method for evaluating dynamic measurement uncertainty.

[0006] An optical fiber transmission system for an electronic instrument transformer according to a first aspect embodiment of the present invention is characterized in that it comprises:

[0007] The merging unit, located on the low-voltage side, includes a power laser and at least one communication optical port;

[0008] The data acquisition unit is located on the high-voltage side and includes a photovoltaic cell unit and at least one communication optical port;

[0009] A multi-core photonic crystal fiber, connecting the merging unit and the collector unit, includes at least one type-1 fiber core and at least one type-2 fiber core;

[0010] The first type of fiber core is used to transmit an energy beam from the merging unit to the collector unit;

[0011] The second type of fiber core is used to transmit communication optical signals between the merging unit and the collector unit.

[0012] The fiber optic transmission system for electronic instrument transformers according to embodiments of the present invention has at least the following advantages: This method overcomes the defects of existing electronic instrument transformers, such as system complexity, high cost, and insufficient reliability caused by the separation of power supply fiber and communication fiber, and proposes a simplified, highly integrated, and stable fiber optic transmission system and method. It can integrate multiple traditional optical cables into a single special optical fiber, reducing installation space requirements and construction complexity; reducing the number of optical cables, connectors, and related accessories, thus lowering material and maintenance costs; reducing potential failure points, thus improving long-term operational stability and security; by setting a large-diameter central fiber core for power transmission and a small-diameter peripheral fiber core for communication, it achieves physical isolation and performance optimization of energy and data transmission, avoiding signal crosstalk; and supports multi-channel parallel or full-duplex communication, achieving higher bandwidth and higher energy utilization.

[0013] According to some embodiments of the present invention, the multi-core photonic crystal fiber includes a central core located at the center of the fiber and a plurality of peripheral cores arranged around the central core;

[0014] The central fiber core is a type 1 fiber core, used to transmit energy beams;

[0015] The peripheral fiber core is a type II fiber core used for transmitting communication optical signals.

[0016] According to some embodiments of the present invention, the core diameter of the central core is larger than the core diameter of any of the peripheral cores.

[0017] According to some embodiments of the present invention, the number of peripheral fiber cores is multiple, used to realize multi-channel parallel or full-duplex communication.

[0018] According to some embodiments of the present invention, optical isolation is achieved between the first type of fiber core and the second type of fiber core through a photonic crystal cladding to prevent signal crosstalk.

[0019] According to some embodiments of the present invention, the power supply laser is a high-power semiconductor laser, and the photovoltaic cell unit is a gallium arsenide photovoltaic cell array.

[0020] According to a second aspect of the present invention, a method for optical fiber transmission in an electronic instrument transformer is characterized in that an energy beam is coupled from the merging unit to a first type of core of the multi-core photonic crystal fiber;

[0021] The communication optical signal is coupled from the merging unit and / or the collector unit to the second type of fiber core of the multi-core photonic crystal fiber;

[0022] The energy beam is transmitted to the collector unit through the first type of fiber core, and the energy beam is converted into electrical energy by the photovoltaic cell unit;

[0023] The second type of fiber core is used to transmit communication optical signals bidirectionally between the merging unit and the collector unit.

[0024] According to some embodiments of the present invention, the communication optical signal includes a downlink signal and an uplink signal, wherein the downlink signal is transmitted through a portion of the second type of fiber core, and the uplink signal is transmitted through other second type of fiber cores, thereby realizing full-duplex communication.

[0025] According to some embodiments of the present invention, the energy beam and the communication optical signal are transmitted concurrently in a single multi-core photonic crystal fiber without interfering with each other.

[0026] According to some embodiments of the present invention, the coupling of the energy beam adopts a high-power laser coupling method, and the coupling of the communication optical signal adopts a multi-channel optical distribution strategy.

[0027] Additional aspects and advantages of the invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0028] The above and / or additional aspects and advantages of the present invention will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0029] Figure 1 This is a schematic diagram of the optical fiber transmission system of the electronic instrument transformer according to an embodiment of the present invention;

[0030] Figure 2 This is a schematic cross-sectional view of a multi-core photonic crystal fiber in the optical fiber transmission system of the electronic instrument transformer according to an embodiment of the present invention. Detailed Implementation

[0031] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.

[0032] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.

[0033] In the description of this invention, "several" means one or more, "more than" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.

[0034] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.

[0035] Example 1

[0036] To address the reliability issues arising from the high construction difficulty and complexity of existing fiber optic transmission systems, this invention aims to simplify the physical connection between the high-voltage and low-voltage units of electronic instrument transformers. This simplifies the system's complexity, cost, and failure rate while ensuring power supply efficiency and communication quality. The invention provides a fiber optic transmission system for electronic instrument transformers, such as... Figure 1 As shown, the system includes at least:

[0037] A merging unit, a collector unit, and a multi-core photonic crystal fiber connecting the merging unit and the collector unit. Wherein:

[0038] The merging unit, located on the low-voltage side, includes a power laser and at least one communication optical port; the power laser is used to generate an energy beam.

[0039] The power laser is typically a high-power semiconductor laser, which generates a high-energy laser beam to power the remote acquisition unit. Each communication optical port is a standard optical transceiver module, used to send downlink data such as control commands and synchronization signals, and to receive uplink data such as measurement data uploaded by the acquisition unit.

[0040] The data acquisition unit, located on the high-voltage side, includes a photovoltaic cell unit and at least one communication optical port. The photovoltaic cell unit receives the energy beam and converts it into electrical energy. The core function of the photovoltaic cell unit (e.g., a gallium arsenide photovoltaic cell array) is to efficiently convert the received laser energy into electrical energy to power all electronic components within the data acquisition unit, including the signal sampling circuit (such as an AD sampling unit), processor, and communication optical port. The communication optical port is responsible for sending the acquired, digitized measurement signals to the merging unit and receiving instructions from the merging unit.

[0041] A multi-core photonic crystal fiber, connecting the merging unit and the collector unit, includes at least one type-1 fiber core and at least one type-2 fiber core;

[0042] The first type of fiber core is used to transmit the energy beam from the merging unit to the collector unit, serving as an energy transmission channel. It is designed with a central fiber core of a larger diameter, which has two major advantages: first, it facilitates efficient coupling with the power supply laser, injecting as much laser energy as possible into the fiber; second, it can withstand higher optical power density, meeting the power consumption requirements of the collector unit.

[0043] The second type of fiber core is used to transmit communication optical signals between the merging unit and the collector unit, serving as a data communication channel. These are multiple independent fiber cores with relatively small diameters. The design of multiple fiber cores provides multiple parallel communication channels, which can be flexibly configured. For example, some fiber cores can be used for downlink communication (from the merging unit to the collector unit), while other fiber cores can be used for uplink communication (from the collector unit to the merging unit), easily achieving full-duplex, high-bandwidth data exchange. Sufficient spacing is maintained between the fiber cores through cladding material, effectively preventing crosstalk between channels.

[0044] Furthermore, such as Figure 2 As shown, the multi-core photonic crystal fiber comprises a central core located at the center of the fiber and a plurality of peripheral cores arranged around it. The central core is a first-type core, and the plurality of peripheral cores are second-type cores. To improve energy coupling efficiency, the core diameter of the central core is larger than the core diameter of any of the peripheral cores.

[0045] The fiber optic transmission system for electronic instrument transformers provided in the above embodiments has at least the following advantages:

[0046] 1. High integration and simplified structure: The power supply optical path and communication optical path are integrated into a single multi-core photonic crystal fiber, replacing the traditional multi-cable solution, which significantly simplifies the physical connection structure of the system and facilitates on-site installation and maintenance.

[0047] 2. Reduced costs and improved reliability: The reduced number of optical cables, connectors, and other hardware components directly lowers material and construction costs. Furthermore, fewer physical connection points mean fewer potential points of failure, thereby improving the long-term reliability of the entire system.

[0048] 3. Performance optimization and functional independence: By designing fiber cores with different functions and specifications (such as large-diameter central fiber core for power transmission and small-diameter peripheral fiber core for communication), physical isolation and performance optimization of the energy transmission channel and data transmission channel are achieved, ensuring the efficiency of high-power energy transmission and the quality of multi-channel data communication, and avoiding crosstalk between signals.

[0049] Example 2

[0050] Based on the fiber optic transmission system for electronic instrument transformers provided in Embodiment 1, the system mainly includes a merging unit located in the low-voltage side equipment area (such as a control room or control cabinet) and a data acquisition unit located in the high-voltage side equipment area. These two units are connected by a specially designed multi-core photonic crystal fiber, which simultaneously performs both energy transmission and data communication functions, and achieves reliable electrical isolation between high and low voltage.

[0051] The workflow of this system includes:

[0052] S100, Couple the energy beam from the merging unit to the first type of core of the multi-core photonic crystal fiber.

[0053] The power laser within the merging unit emits a high-power laser beam, which is precisely coupled into the central type-1 core of the multi-core photonic crystal fiber.

[0054] S200, Couple the communication optical signal from the merging unit and / or the collector unit to the second type of fiber core of the multi-core photonic crystal fiber.

[0055] One or more communication optical ports of the merging unit emit optical signals containing command or synchronization information, which are then coupled to designated type II fiber cores. The energy beam and data optical signals are transmitted independently in different cores of the same multi-core photonic crystal fiber without interference, and finally reach the acquisition unit.

[0056] S300, The energy beam is transmitted to the collector unit through the first type of fiber core, and the energy beam is converted into electrical energy by the photovoltaic cell unit.

[0057] At the collector unit, the energy beam emitted from the first type of fiber core shines on the photovoltaic cell unit, which converts it into electrical energy to supply the entire unit.

[0058] S400, bidirectional transmission of communication optical signals between the merging unit and the collector unit via the second type of fiber core.

[0059] The data optical signal emitted from the Type II fiber core is received and demodulated by the corresponding communication optical port. After the acquisition unit completes the acquisition and processing of the primary equipment signal, it encodes the measurement data into an optical signal through its communication optical port and couples it to other unused Type II fiber cores, transmitting it back to the merging unit via the same multi-core photonic crystal fiber. The merging unit's communication optical port receives the uplink data from the acquisition unit, completing a full measurement and communication loop.

[0060] The device embodiments described above are merely illustrative. The units described as separate components may or may not be physically separate; that is, they may be located in one place or distributed across multiple network units. Some or all of the modules can be selected to achieve the purpose of this embodiment according to actual needs.

[0061] It will be understood by those skilled in the art that all or some of the steps and systems in the methods disclosed above can be implemented as software, firmware, hardware, and suitable combinations thereof. Some or all of the physical components can be implemented as software executed by a processor, such as a central processing unit, digital signal processor, or microprocessor, or as hardware, or as an integrated circuit, such as an application-specific integrated circuit. Such software can be distributed on a computer-readable medium, which can include computer storage media (or non-transitory media) and communication media (or transient media). As is known to those skilled in the art, the term computer storage media includes volatile and non-volatile, removable and non-removable media implemented in any method or technology for storing information (such as computer-readable instructions, data structures, program modules, or other data). Computer storage media includes, but is not limited to, RAM, ROM, EEPROM, flash memory or other memory technologies, CD-ROM, digital versatile disc (DVD) or other optical disc storage, magnetic cartridges, magnetic tape, disk storage or other magnetic storage devices, or any other medium that can be used to store desired information and is accessible to a computer. Furthermore, as is known to those skilled in the art, communication media typically contain computer-readable instructions, data structures, program modules, or other data in modulated data signals such as carrier waves or other transmission mechanisms, and may include any information delivery medium.

[0062] The above is a detailed description of the preferred embodiments of this application. However, this application is not limited to the above embodiments. Those skilled in the art can make various equivalent modifications or substitutions without departing from the spirit of this application. All such equivalent modifications or substitutions are included within the scope defined by the claims of this application.

Claims

1. A fiber optic transmission system for electronic instrument transformers, characterized in that, include: The merging unit, located on the low-voltage side, includes a power laser and at least one communication optical port; The data acquisition unit is located on the high-voltage side and includes a photovoltaic cell unit and at least one communication optical port; A multi-core photonic crystal fiber, connecting the merging unit and the collector unit, includes at least one type-1 fiber core and at least one type-2 fiber core; The first type of fiber core is used to transmit an energy beam from the merging unit to the collector unit; The second type of fiber core is used to transmit communication optical signals between the merging unit and the collector unit.

2. The system according to claim 1, characterized in that, The multi-core photonic crystal fiber includes a central core located at the center of the fiber and multiple peripheral cores arranged around the central core. The central fiber core is a type 1 fiber core, used to transmit energy beams; The peripheral fiber core is a type II fiber core used for transmitting communication optical signals.

3. The system according to claim 2, characterized in that, The diameter of the central fiber core is greater than the diameter of any of the peripheral fibers.

4. The system according to claim 2 or 3, characterized in that, The number of peripheral fiber cores is multiple, used to realize multi-channel parallel or full-duplex communication.

5. The system according to claim 1, characterized in that, The first type of fiber core and the second type of fiber core are optically isolated by a photonic crystal cladding to prevent signal crosstalk.

6. The system according to claim 1, characterized in that, The power supply laser is a high-power semiconductor laser, and the photovoltaic cell unit is a gallium arsenide photovoltaic cell array.

7. A fiber optic transmission method for electronic instrument transformers, characterized in that, The method, employing the system as described in any one of claims 1 to 6, comprises: The energy beam is coupled from the merging unit to the first type of core of the multi-core photonic crystal fiber; The communication optical signal is coupled from the merging unit and / or the collector unit to the second type of fiber core of the multi-core photonic crystal fiber; The energy beam is transmitted to the collector unit through the first type of fiber core, and the energy beam is converted into electrical energy by the photovoltaic cell unit; The second type of fiber core is used to transmit communication optical signals bidirectionally between the merging unit and the collector unit.

8. The method according to claim 7, characterized in that, The communication optical signal includes a downlink signal and an uplink signal. The downlink signal is transmitted through a portion of the second type of fiber core, and the uplink signal is transmitted through other second type of fiber cores to achieve full-duplex communication.

9. The method according to claim 7 or 8, characterized in that, The energy beam and communication optical signal are transmitted concurrently in a single multi-core photonic crystal fiber without interfering with each other.

10. The method according to claim 7, characterized in that, The energy beam is coupled using a high-power laser coupling method, and the communication optical signal is coupled using a multi-channel optical distribution strategy.

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