Differential protection service signal switching system for 2M optical technology

Abstract

The utility model discloses a differential protection service signal switching system for 2M optical technology, and relates to the technical field of electric power communication protection. The utility model comprises a signal processing module which is used for processing data from a signal feedback interface, generating service logic signals and respectively transmitting optical fiber data signals and Ethernet data through an optical port and an Ethernet interface; the channel selection module is used for receiving the service logic signal from the signal processing module, switching an activated data channel and transmitting the service logic signal to the differential protection device through a GMII interface; and the voltage stabilizing module provides a direct-current power supply for the signal processing module and the channel selection module. The differential protection service signal switching system for the 2M optical technology has the beneficial effects that the reliability and the safety of an electric power system can be remarkably improved by adopting the advanced 2M optical port technology, the signal lossless switching technology, the redundancy design, the remote monitoring and management functions and the like.

Description

Technical Field

[0001] This utility model relates to the field of power communication protection technology, and in particular to a differential protection service signal switching system for 2M optical technology. Background Technology

[0002] With the continuous expansion and increasing complexity of power systems, differential protection, as a crucial means of power line protection, faces increasingly stringent requirements for reliability and real-time performance. Traditional differential protection methods largely rely on electrical signal transmission, making them susceptible to electromagnetic interference and grounding faults. In recent years, 2M optical technology, with its high bandwidth, low loss, and strong anti-interference capabilities, has been widely applied in power systems. Differential protection, as an important protection method in power systems, requires a stable and reliable communication channel to transmit protection signals.

[0003] However, in practical applications, communication channels may be affected by various factors and malfunction, causing differential protection to fail to function properly. Therefore, a differential protection service signal switching module for 2M optical technology, which enables fast and lossless signal switching, is of great significance for improving the safety and stability of power systems. Utility Model Content

[0004] The purpose of this section is to outline some aspects of embodiments of the present invention and to briefly describe some preferred embodiments. Simplifications or omissions may be made in this section, as well as in the abstract and title of this application, to avoid obscuring the purpose of these documents; however, such simplifications or omissions should not be construed as limiting the scope of the present invention.

[0005] Therefore, the problem to be solved by this utility model is how to achieve fast and lossless switching of differential protection service signals for 2M optical technology.

[0006] To solve the above technical problems, this utility model provides the following technical solution: a differential protection service signal switching system for 2M optical technology, including a signal processing module for processing data from the signal feedback interface and generating service logic signals, and transmitting fiber optic data signals and Ethernet data through the optical port and Ethernet interface respectively;

[0007] The channel selection module receives the service logic signal from the signal processing module and switches the activated data channel, and transmits it to the differential protection device through the GMII interface.

[0008] The voltage regulator module provides DC power to the signal processing module and the channel selection module.

[0009] As a preferred scheme of the differential protection service signal switching system for 2M optical technology, the processing chip of the signal feedback interface transmits the feedback signal of the differential protection device to the MCU of the signal processing module.

[0010] As a preferred scheme of the differential protection service signal switching system for 2M optical technology, the signal processing module is composed of CPU, eMMC, DDR, USB and DC-DC and runs in a Linux environment.

[0011] As a preferred scheme of the differential protection service signal switching system for 2M optical technology, the channel selection module comprises a control chip, a display chip and a communication chip.

[0012] As a preferred scheme of the differential protection service signal switching system for 2M optical technology, the display chip displays the channel logic level.

[0013] As a preferred scheme of the differential protection service signal switching system for 2M optical technology, the control chip is responsible for selecting and controlling the service logic channel.

[0014] As a preferred scheme of the differential protection service signal switching system for 2M optical technology, the communication chip communicates with the signal processing module core and compares the channel switching and signal feedback results.

[0015] As a preferred scheme of the differential protection service signal switching system for 2M optical technology, the optical port realizes photoelectric signal conversion through an optical transceiver; and the optical port is connected to the GMII interface through a cage.

[0016] As a preferred scheme of the differential protection service signal switching system for 2M optical technology, the four differential signal channels of the Ethernet interface are connected to the secondary side of a network transformer.

[0017] As a preferred scheme of the differential protection service signal switching system for 2M optical technology, the voltage of the voltage stabilizing module is reduced to 3.3V and 0.95V through the first and second voltage reduction chips, respectively.

[0018] The differential protection service signal switching system for 2M optical technology has the advantages that by adopting advanced 2M optical port technology, signal lossless switching technology, redundancy design, remote monitoring and management and other functions, the reliability and safety of the power system can be significantly improved. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced as follows. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained by those skilled in the art without creative labor on the premise of not deviating from the concept of the present application. Among them:

[0020] Figure 1 The overall schematic diagram of the differential protection service signal switching system for 2M optical technology provided by the present application is shown in the figure.

[0021] Figure 2 The circuit diagram of the signal feedback interface of the present application is shown in the figure.

[0022] Figure 3 The circuit diagram of the channel selection module of the present application is shown in the figure.

[0023] Figure 4 The circuit diagram of the optical port of the present application is shown in the figure.

[0024] Figure 5 The circuit diagram of the service signal processing module of the present application is shown in the figure.

[0025] Figure 6 The interface circuit diagram of the Ethernet interface and the multi-channel GMII of the present application is shown in the figure.

[0026] Figure 7 The circuit diagram of the voltage stabilizing module of the present application is shown in the figure. DETAILED DESCRIPTION

[0027] In order to make the above-mentioned purposes, features and advantages of the present application more apparent and easy to understand, the specific embodiments of the present application will be described in detail below with reference to the drawings of the specification.

[0028] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be implemented in other ways different from the description, and those skilled in the art can make similar generalizations without deviating from the concept of the present application, therefore the present application is not limited by the specific embodiments disclosed below.

[0029] Secondly, the present application is described in detail in combination with the schematic diagram, in the detailed description of the embodiments of the present application, for the convenience of description, the sectional view of the device structure will be partially enlarged without general proportion, and the schematic diagram is only an example, which should not limit the scope of protection of the present application here. In addition, three-dimensional spatial dimensions including length, width and depth should be included in actual manufacturing.

[0030] Thirdly, the "one embodiment" or "embodiment" referred to herein can include a specific feature, structure, or characteristic in at least one implementation of the present disclosure. The "in one embodiment" appearing in various places in the specification does not all refer to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments.

[0031] Embodiment 1, reference Figures 1 to 7 The embodiment provides a differential protection service signal switching system for 2M optical technology, which comprises a signal processing module 100 for processing data from a signal feedback interface 101 and generating a service logic signal, transmitting fiber data signals and Ethernet data through optical ports SFP and Ethernet interfaces RJ45 respectively; a channel selection module 200 receiving the service logic signal from the signal processing module 100 and switching the activated data channel, and transmitting to the differential protection device through the GMII interface; and a voltage stabilizing module 300 providing direct current power supply for the signal processing module 100 and the channel selection module 200.

[0032] Service data processing interface receives signals: the service data processing interface first receives service data from the power grid differential protection device. These data may include power grid parameters such as current, voltage, and possible fault signals.

[0033] Generation of service logic signals: the service data processing interface generates service logic signals according to the received data and the preset service logic. These signals reflect the current state of the power grid, such as normal operation, fault detection or maintenance mode.

[0034] Channel selection unit receives service logic signals: the channel selection unit receives service logic signals from the service data processing interface. These signals indicate the data channel that needs to be activated for data forwarding.

[0035] Channel selection decision: the channel selection unit decides which data channel should be activated according to the service logic signals. This decision-making process may involve comparing different channel states and selecting the best or backup channel.

[0036] Sending of signal switching instructions: once the channel selection unit decides the data channel, it sends signal switching instructions to the multi-channel GMII interface of signal switching. This instruction instructs the GMII interface to switch signals between different data channels.

[0037] Data forwarding: after the GMII interface performs signal switching, the service data processing interface starts forwarding service data through the selected data channel. This ensures that the data can be correctly transmitted to the destination according to the requirements of the power grid differential protection.

[0038] Monitoring and feedback: Throughout the process, the business data processing interface and channel selection unit also monitors the status of data transmission and feeds back relevant information to the power grid differential protection device through the signal feedback interface, so as to further monitor and control.

[0039] Through this interaction, the business data processing interface and channel selection unit jointly ensure that the power grid differential protection business signal can be transmitted on the best data channel, thereby improving the reliability and safety of the power grid.

[0040] The processing chip U5 of the signal feedback interface 101 transmits the feedback signal of the differential protection device to the MCU of the signal processing module 100.

[0041] The signal processing module 100 is composed of CPU, eMMC, DDR, USB and DC-DC, and runs in Linux environment.

[0042] The channel selection module 200 includes control chip U7, display chip U6 and communication chip U8.

[0043] The display chip U6 displays the channel logic level.

[0044] The control chip U7 is responsible for selecting and controlling the business logic channel.

[0045] The communication chip U8 communicates with the core of the signal processing module 100 and compares the channel switching and signal feedback results.

[0046] The optical port SFP realizes the conversion of optical and electrical signals through the optical transceiver CH1 SFP; the optical port SFP is connected to the GMII interface through the cage CN2.

[0047] The four differential signal channels of the Ethernet interface RJ45 are connected to the secondary side of the network transformer.

[0048] The voltage of the voltage stabilization module 300 is reduced to 3.3V and 0.95V through the first and second voltage reduction chips U3 and U4 respectively.

[0049] The electronic components such as CPU U9, eMMC, DDR, USB, DC-DC, etc. have different functions to support the interaction between business data processing and differential protection device. The functions of these components are as follows:

[0050] CPU U9: Central processing unit, is the core of the whole system, responsible for executing program instructions, processing data, and controlling the work of other components. In Linux environment, CPU runs operating system and application program, realizes business logic control and data interaction.

[0051] eMMC: Embedded MultiMediaCard, is a type of flash memory that integrates a controller for storing operating systems, applications, and data. eMMC provides non-volatile storage, meaning data is retained even in the event of power loss.

[0052] DDR: Double Data Rate Synchronous Dynamic Random Access Memory, is a type of dynamic random access memory used for providing fast volatile storage. DDR is used for storing temporary data and programs, with its double data rate feature allowing data to be transmitted on both the rising and falling edges of the clock signal, resulting in increased data transfer rates.

[0053] USB: Universal Serial Bus, is a serial port used for connecting computers and external devices. In the business data processing circuit, the USB interface may be used for data transfer, device connection, or power supply.

[0054] DC-DC: Direct Current to Direct Current Converter, is a power conversion device used to convert a DC power supply at one voltage level to another voltage level. In the circuit, the DC-DC converter may be used to provide a stable power supply to the CPU and other components, ensuring they operate at the appropriate voltage.

[0055] These components work together to ensure that the business data processing circuit can efficiently process data, enabling communication and control with the differential protection device. The CPU serves as the control center, eMMC and DDR provide storage solutions, USB is used for external device connection, and the DC-DC converter ensures stable power supply.

[0056] Embodiment 2, refer to Figure 2 , the second embodiment of the utility model, which is different from the first embodiment is: the embodiment provides a signal feedback interface 101, in the differential protection service signal switching module, the interaction between the signal feedback interface and the CPU is realized through a specific signal transmission mechanism. The following is a detailed process of how the signal feedback interface transmits signals with the CPU:

[0057] Signal feedback interface: This is an input port of the module that receives feedback signals from the differential protection device. These signals may include grid status, fault indications, or other information that needs to be processed by the CPU.

[0058] Signal transmission: When the differential protection device detects a grid fault or needs to switch signals, it sends signals through the signal feedback interface. These signals may be transmitted electrically or optically, depending on the design of the interface.

[0059] CPU receives signals: The CPU U9, as the core of the service data processing, receives signals from the signal feedback interface through its internal input / output system. In the Linux environment, the CPU runs the operating system and applications that listen to the status of the signal feedback interface.

[0060] Signal processing: After receiving the signal, the CPU processes it according to the pre-set business logic. This may involve executing specific program code, such as switching data channels, adjusting protection strategies, or recording event logs.

[0061] Business logic control: Based on the processing results, the CPU controls other electronic components (such as eMMC, DDR, USB, DC-DC, etc.) to achieve business logic control. For example, the CPU may switch data channels through the GMII interface or adjust the power supply through the DC-DC converter to respond to changes in the grid state.

[0062] Data interaction: The CPU is also responsible for data interaction with the service interface, ensuring that business data can be correctly transmitted within the module or between external devices.

[0063] Feedback confirmation: After signal processing is complete, the CPU may send a confirmation signal to the differential protection device through the signal feedback interface to indicate that the signal switching has been completed or is in progress.

[0064] This process ensures that the differential protection service signal switching module can respond to changes in the grid state in real time and achieve fast and accurate signal switching through the intelligent control of the CPU.

[0065] Embodiment 3, refer to Figure 4 , the third embodiment of the utility model, which is different from the first two embodiments is: the embodiment provides a kind of optical port SFP, optical interface module (SFP): CH1 SFP is optical interface module, it is a small form-factor pluggable optical transceiver, for realizing the conversion between electrical signal and optical signal.

[0066] Electrical signal input / output: The SFP module is connected to other components in the circuit through a series of pins (such as TXD, RXD, TX_EN, etc.). The TXD pin is used to send electrical signals to the optical interface, while the RXD pin is used to receive electrical signals from the optical interface.

[0067] Power supply: The SFP module needs power to work, which is usually provided by the power management part in the circuit. In the figure, it can be seen that the SFP module is connected to a 3.3V power supply.

[0068] Signal Processing: In the SFP module, electrical signals are converted into optical signals for transmission over the fiber optic cable. Received optical signals are converted back into electrical signals for further processing in the circuit.

[0069] Control Signals: The SFP module can also receive control signals, such as TX_DISABLE, which are used to control the transmit function of the optical interface. In the diagram, the TX_DISABLE pin is connected to ground (GND), indicating that the transmit function is enabled.

[0070] Status Monitoring: The SFP module can provide status signals, such as LOS (Loss of Signal) and LVL (Signal Level), for monitoring the operational status of the optical interface. In the diagram, pins like MOD_ABS, RX_LOS, etc., can be seen, which can be used for status monitoring.

[0071] Fiber Optic Connection: The SFP module connects to the fiber optic network through a fiber optic connector. In the diagram, the fiber optic connector is not explicitly labeled but is typically connected to the SFP module.

[0072] Protection and Filtering: To ensure signal stability and prevent interference, protection and filtering components such as resistors, capacitors, and inductors can be included in the circuit. In the diagram, resistors (e.g., R14, R17) and capacitors (e.g., C7, C8) connected to the SFP module can be seen, which can be used for signal conditioning.

[0073] Embodiment 4, Referring to Figure 6 The fourth embodiment of the present application differs from the first three embodiments in that it provides an Ethernet interface RJ45, and the RJ45 interface part:

[0074] Network Transformer (GZ4255): The RJ45 interface is connected to the circuit through a network transformer. The network transformer is used for signal isolation, reduces electromagnetic interference, and matches the impedance between different network devices.

[0075] Signal Pairs: The secondary side of the network transformer is connected to four pairs of differential signal lines (POMDI_A_P / N, POMDI_B_P / N, POMDI_C_P / N, POMDI_D_P / N), which correspond to the four differential signal channels of the RJ45 interface.

[0076] Resistors and Capacitors: Resistors (e.g., R1448, R1449, etc.) and capacitors (e.g., C13002, C13004, etc.) connected to the secondary side of the network transformer are used for signal conditioning, including impedance matching, filtering, and signal stabilization.

[0077] RJ45 Interface Connector: These pairs of differential signal lines are finally connected to the RJ45 interface connector, which is used to physically connect to the Ethernet cable.

[0078] Embodiment 5, refer to Figure 6 The fifth embodiment of the present application is different from the first four embodiments in that it provides a multi-channel GMII interface part:

[0079] GMII interface: GMII (Gigabit Media Independent Interface) is an interface for Ethernet physical layer, which supports high-speed data transmission. In the figure, the GMII interface is connected to the CPU or other network processing units through a series of pins (such as MDIO, MDC, TXD, RXD, etc.).

[0080] Signal conditioning: resistors (such as R14481, R14490, etc.) and capacitors (such as C13006, C13005, etc.) connected to the GMII interface are used for signal conditioning to ensure signal integrity and stability.

[0081] LED indication: the GMII interface circuit may include LED indicator lights (such as LED2_PU, LED2_G+), which are used to display network connection status and data transmission status.

[0082] SFP and cage: SFP (Small Form-factor Pluggable) modules are connected to the GMII interface through a cage (CN2). SFP modules are used to convert electrical signals to optical signals for transmission through optical fibers.

[0083] Power supply and ground: the GMII interface circuit requires stable power supply, usually 3.3V. Capacitors (such as C13007, C13008) in the circuit are used for power filtering to ensure the stability of the power supply.

[0084] Signal feedback: the GMII interface may include a signal feedback mechanism to monitor data transmission status and adjust signal parameters.

[0085] It is important to note that the construction and arrangements of the application shown in the various exemplary embodiments are illustrative only. Although only a few embodiments have been described in detail in this disclosure, those skilled in the art who review this disclosure will readily appreciate that many modifications can be made to the embodiments without departing from the novel teachings and advantages of the subject matter described herein (e.g., variations in sizes, dimensions, structures, shapes and proportions of the various elements, values of parameters, mounting arrangements, use of materials, colors, orientations, locations, and the like). For example, the elements shown as integrally formed can be constructed of multiple parts or elements, the position of elements can be reversed or otherwise varied, and the nature or number of elements or positions can be modified or changed. Accordingly, all such modifications are intended to be included within the scope of the present inventive subject matter. The order or sequence of any process or method steps can be varied or re-sequenced without departing from the subject matter described herein. Any "open / closed" claims are intended to encompass the structure described herein, and not just the structure equivalent, but also the equivalent structure. Other substitutions, modifications, changes, and omissions can be made in the design, operating conditions, and arrangement of the exemplary embodiments without departing from the scope of the present inventive subject matter. Accordingly, the present inventive subject matter is not limited to particular embodiments described, but extends to any inventive subject matter within the scope of the appended claims.

[0086] Furthermore, in order to provide a concise description of exemplary embodiments, not all features of an actual implementation can be described (i.e., those pertaining to the best mode for carrying out the inventive subject matter currently under consideration, or those that are not relevant to the implementation of the inventive subject matter).

[0087] It is to be understood that the development of the exemplary embodiments of this application can not be limited to the particular implementation described above, but can include any number of variations, modifications, or equivalents to the described implementations. For example, the order of the steps can be varied, or some steps can be omitted, or some steps can be performed in parallel. It is further understood that the use of relational terms such as first and second, and the like, if any, are used solely to distinguish one from another entity or action without necessarily implying a required order of such entities or actions or the necessity of such entities or actions.

[0088] It should be noted that the above examples are intended to be illustrative only and not limiting of the technical solutions of the present application. Although the present application has been described in detail with reference to the preferred embodiments, those skilled in the art should understand that the technical solutions of the present application can be modified or replaced equivalently without departing from the spirit and scope of the technical solutions of the present application, and all should be included in the scope of the claims of the present application.

Claims

1. A differential protection service signal switching system for 2M optical technology, characterized by: Including, The signal processing module (100) is used for processing data from the signal feedback interface (101) and generating service logic signals, transmitting fiber data signals and Ethernet data through optical ports (SFP) and Ethernet interfaces (RJ45) respectively; The channel selection module (200) receives service logic signals from the signal processing module (100) and switches the activated data channel, and transmits it to the differential protection device through the GMII interface; The voltage stabilizing module (300) provides DC power supply for the signal processing module (100) and the channel selection module (200).

2. The differential protection service signal switching system for 2M optical technology of claim 1, wherein: The processing chip (U5) of the signal feedback interface (101) transmits the feedback signal of the differential protection device to the MCU of the signal processing module (100).

3. The differential protection service signal switching system for 2M optical technology of claim 2, wherein: The signal processing module (100) is composed of CPU, eMMC, DDR, USB and DC-DC, and runs in Linux environment.

4. The differential protection service signal switching system for 2M optical technology of claim 3, wherein: The channel selection module (200) includes control chip (U7), display chip (U6) and communication chip (U8).

5. The differential protection service signal switching system for 2M optical technology of claim 4, wherein: The display chip (U6) displays the channel logic level.

6. The differential protection service signal switching system for 2M optical technology of claim 5, wherein: The control chip (U7) is responsible for selecting and controlling the service logic channel.

7. The differential protection service signal switching system for 2M optical technology of claim 6, wherein: The communication chip (U8) communicates with the core of the signal processing module (100), and compares the channel switching and signal feedback results.

8. The differential protection service signal switching system for 2M optical technology as claimed in any one of claims 1 to 7, characterized in that: The optical port (SFP) realizes the conversion of optical and electrical signals through the optical transceiver (CH1 SFP); the optical port (SFP) is connected to the GMII interface through the cage (CN2).

9. The differential protection service signal switching system for 2M optical technology of claim 8, wherein: The four differential signal channels of the Ethernet interface (RJ45) are connected to the secondary side of the network transformer.

10. The differential protection service signal switching system for 2M optical technology of claim 9, wherein: The voltage stabilizing module (300) reduces the voltage to 3.3V and 0.95V through the first and second voltage reduction chips (U3 and U4) respectively.

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