Safe and controllable distributed power distribution automation terminal

Abstract

The utility model relates to a safe and controllable distributed power distribution automation terminal, which comprises a main control module, an external communication module and a measurement and control function module, and is characterized in that a real-time core, a communication core and a shared memory are arranged in the main control module, and the real-time core and the communication core are both electrically connected with the shared memory; the measurement and control function module is electrically connected with the corresponding input and output end of the real-time core, and the external communication module is electrically connected with the corresponding output end of the communication core. According to the safe and controllable distributed power distribution automation terminal, decoupling and efficient cooperation of a measurement and control task and a communication task can be realized, and the task processing efficiency and the operation reliability can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of power system automation, in particular to a safe and controllable distributed power distribution automation terminal. Background Art

[0002] In power distribution systems, distribution automation terminals (DATs) are key equipment for implementing smart grids. They are typically deployed at key nodes such as substations, switchgear stations, and distribution lines. The core functions of these DATs are to monitor grid operating parameters (such as voltage, current, and frequency) in real time, execute control operations on switchgear (such as opening and closing), and implement relay protection for equipment such as lines and transformers. This ensures that in the event of a fault (such as a short circuit or overload), the faulty area can be quickly, reliably, and selectively isolated, safeguarding the safety of the main grid and ensuring power supply continuity.

[0003] Traditional distribution automation terminals typically utilize single-core or homogeneous multi-core architectures, responsible for real-time signal acquisition, fault detection, relay protection, and remote communication. However, because they must simultaneously handle real-time measurement and control tasks and communication, they have a high degree of task coupling and low task scheduling efficiency, which can easily lead to response delays and make it difficult to meet the millisecond-level real-time requirements of smart grids. Furthermore, their reliability is insufficient, and single points of failure can easily cause system failures, impacting the continuous operation of the grid. Furthermore, the security protection mechanisms of traditional distribution automation terminals rely on general algorithms, lack hardware security support, and inadequate communication data encryption capabilities, which can easily lead to data leaks and pose significant security risks. Utility Model Content

[0004] The technical problem to be solved by this utility model is to provide a safe and controllable distributed power distribution automation terminal, which can achieve the decoupling and efficient coordination of measurement and control tasks and communication tasks, thereby improving its task processing efficiency and operational reliability. The technical solution adopted is as follows:

[0005] A safe and controllable distributed power distribution automation terminal includes a main control module, an external communication module and a measurement and control function module, characterized in that: the main control module has a built-in real-time core, a communication core and a shared memory, and the real-time core and the communication core are both electrically connected to the shared memory; the measurement and control function module is electrically connected to the corresponding input and output terminals of the real-time core, and the external communication module is electrically connected to the corresponding output terminal of the communication core.

[0006] In the above-mentioned safe and controllable distributed distribution automation terminal, the main control module has a built-in real-time core and a communication core. The real-time core is responsible for the measurement and control function and can run measurement and control tasks such as signal acquisition, fault detection and relay protection logic processing through the measurement and control function module; the communication core is responsible for the communication function and can realize remote data transmission through the external communication module; the main control module adopts a dual-core heterogeneous design of real-time core and communication core. The real-time core and the communication core are isolated by interrupt shielding and data interaction is realized through shared memory. The dual-core collaboration can improve task processing efficiency, shorten deployment time, adapt to the needs of smart grids, and realize the functional independence of the real-time core and the communication core, ensuring that when any core of the real-time core and the communication core fails, the other core functions normally, preventing the failure of a single core from affecting the overall system, and improving the reliability of the distribution automation terminal operation.

[0007] As a preferred embodiment of the present invention, the external communication module is electrically connected to the corresponding output terminal of the communication core via a security encryption module. Specifically, the security encryption module can utilize a domestically produced encryption chip that can execute the SM2 / SM3 / SM4 algorithms to ensure data encryption and identity authentication. The security encryption module is used to encrypt data transmitted by the communication core before remotely transmitting it via the external communication module, thereby ensuring data and communication security within the distribution automation terminal.

[0008] As a preferred embodiment of the present invention, the measurement and control function module includes an analog acquisition unit, a relay protection logic processing unit, a switch control unit, and a fault recording module. The analog acquisition unit, relay protection logic processing unit, switch control unit, and fault recording module are electrically connected to the input and output terminals of the real-time core via a communication interface. The analog acquisition unit is used to acquire analog signals, provide input data, and implement the signal acquisition function; the relay protection logic processing unit is used to analyze faults and implement the relay protection logic processing function; the switch control unit is used to execute actions; the fault recording module is used to record waveforms; and the communication interface is used to enable data exchange between each unit and the real-time core.

[0009] As a further preferred embodiment of the present invention, the communication interface includes an Ethernet interface and a serial interface, thereby enabling the measurement and control function module to support multiple communication protocols, preventing communication interruptions during the measurement and control process, and ensuring stable data transmission.

[0010] As a further preferred embodiment of the present invention, the measurement and control function module further includes a display module electrically connected to the corresponding output terminal of the real-time core. The display module can display the measurement and control task processing data of the measurement and control function module in real time for staff to view in real time.

[0011] Specifically, the main control module is a main control board built with a domestically produced multi-core heterogeneous chip (FUXI-H2). The real-time core is configured as: C-SKY 810, 800MHz, 512KB L2 cache, which runs measurement and control tasks such as signal acquisition, fault detection and relay protection logic processing; the communication core is configured as: C-SKY 860 (800MHz, 512KB L2 cache), connected to the DDR3 controller (1600Mbps, 2GB addressing space) through the HSB-2.0 bus. The communication core can process protocol messages such as IEC61850-8-1 MMS and DL / T634.5104, and transmit them through the RGMII interface after encryption using the SM4-CBC algorithm; the shared memory can accelerate data interaction through block management and DMA to ensure efficient collaboration. In the measurement and control module, the analog acquisition unit uses the FUXI-H2's built-in dual-channel 12-bit ADC (CH0-CH9), with an input range of 0-3.3V and a sampling rate of 1Mbps. An external CS1248 chip is added to achieve 16-bit high-precision sampling, with data transmitted via an SPI interface. The relay protection logic processing unit utilizes a C-SKY 810 core with a 512KB L2 cache. The switch control unit configures the GPIO group in input mode, with a drive capability of 8mA (at VDDIO = 3.3V). The fault recording module stores fault data in eMMC memory (SDIO1 interface, 50MHz clock) for subsequent analysis. The communication interface transfers ADC sampled data to shared memory in real time via a DMA channel. The display module drives a 7-inch LCD screen, using the chip's native LCD interface. Backlight brightness is adjusted via a PWM channel with a duty cycle resolution of 1 / 250. Local control: The GPIO group is configured in output mode to drive the relay coil with a drive current of 16mA.

[0012] Compared with the prior art, the present invention has the following advantages:

[0013] (1) The main control module in this utility model adopts a dual-core heterogeneous design of a real-time core and a communication core. Functional isolation is achieved through interrupt shielding and memory hardware partitioning. The real-time core and the communication core share memory to achieve efficient data interaction. In this way, the dual-core collaboration can be used to improve task processing efficiency, shorten deployment time, and adapt to the needs of smart grids.

[0014] (2) This utility model builds a multi-core heterogeneous distribution automation terminal based on the domestically produced Fuxi chip, and uses the functional independence of the real-time core and the communication core to achieve the decoupling of measurement and control and communication tasks, ensuring that when any of the real-time core and the communication core fails, the other core functions normally, ensuring the continuous operation of the system when a single core fails, improving the system's fault tolerance, and can improve the reliability of the distribution automation terminal operation, reduce maintenance costs, and comprehensively enhance market competitiveness;

[0015] (3) The utility model uses a security encryption module to encrypt the data transmitted by the communication core, and then realizes remote data transmission through an external communication module to prevent it from being attacked by the network and improve the security of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a logic block diagram of the safe and controllable distributed power distribution automation terminal provided by the preferred embodiment of the present utility model.

[0017] Figure 2 yes Figure 1 The working process diagram of the safe and controllable distributed distribution automation terminal is shown. DETAILED DESCRIPTION

[0018] like Figure 1 As shown, this safe and controllable distributed power distribution automation terminal includes a main control module 1, an external communication module 2 and a measurement and control function module 3; the main control module 1 has a built-in real-time core 11, a communication core 12 and a shared memory 13, and the real-time core 11 and the communication core 12 are both electrically connected to the shared memory 13; the external communication module 2 is electrically connected to the corresponding output end of the communication core 12 through the security encryption module 4, and the measurement and control function module 3 is electrically connected to the input and output ends of the real-time core 11.

[0019] refer to Figure 2 The measurement and control function module 3 includes an analog acquisition unit 31, a relay protection logic processing unit 32, a switch control unit 33, and a fault recording module 34. The analog acquisition unit 31, relay protection logic processing unit 32, switch control unit 33, and fault recording module 34 are electrically connected to the input and output terminals of the real-time core 11 via corresponding communication interfaces. The analog acquisition unit 31 is used to acquire analog signals, provide input data, and implement the signal acquisition function; the relay protection logic processing unit 32 is used to analyze faults and implement the relay protection logic processing function; the switch control unit 33 is used to execute actions; the fault recording module 34 is used to record waveforms; and the communication interface is used to enable data exchange between each unit and the real-time core 11. The measurement and control function module 3 also includes a display module 36, which is electrically connected to the corresponding output terminals of the real-time core 11. The display module 36 can display the measurement and control task processing data of the measurement and control function module 3 in real time for staff to view in real time.

[0020] In this embodiment, the main control module 1 is a main control board built with a domestically produced multi-core heterogeneous chip (FUXI-H2). The real-time core 11 is configured as: C-SKY 810, 800MHz, 512KB L2 cache, and runs measurement and control tasks such as signal acquisition, fault detection and relay protection logic processing; the communication core 12 is configured as: C-SKY 860 (800MHz, 512KB L2 cache), connected to the DDR3 controller (1600Mbps, 2GB addressing space) through the HSB-2.0 bus. The communication core 12 can process protocol messages such as IEC61850-8-1 MMS and DL / T634.5104, and transmit them through the RGMII interface after encryption using the SM4-CBC algorithm; the shared memory 13 can accelerate data interaction through block management and DMA to ensure efficient collaboration. In the measurement and control module 3, the analog acquisition unit 31 uses the FUXI-H2's built-in dual-channel 12-bit ADC (CH0-CH9), with an input range of 0-3.3V and a sampling rate of 1Mbps. An external CS1248 chip is added to achieve 16-bit high-precision sampling, with data transmitted via the SPI interface. The relay protection logic processing unit 32 utilizes a C-SKY 810 core with a 512KB L2 cache. The switch control unit 33 configures the GPIO group in input mode, with a drive capability of 8mA (at VDDIO = 3.3V). The fault recording module 34 stores fault data in the eMMC memory (SDIO1 interface, 50MHz clock) for subsequent analysis. The communication interface transfers ADC sampled data to shared memory 13 in real time via a DMA channel. The display module drives a 7-inch LCD screen, using the chip's native LCD interface. Backlight brightness is adjusted via a PWM channel with a duty cycle resolution of 1 / 250. Local control: The GPIO group is configured in output mode to drive the relay coil with a drive current of 16mA.

[0021] In this embodiment, the security encryption module 4 utilizes a domestically produced encryption chip. This chip can execute the SM2 / SM3 / SM4 algorithms, ensuring data encryption and identity authentication. The security encryption module 4 encrypts data transmitted by the communication core 12 before remotely transmitting it via the external communication module 2, thereby ensuring data and communication security within the distribution automation terminal.

[0022] In addition, it should be noted that the names of the various parts of the specific embodiments described in this specification may be different. Any equivalent or simple changes based on the structure, features, and principles of the present utility model patent are included in the scope of protection of the present utility model patent. Those skilled in the art of the present utility model can make various modifications, supplements, or replace the described specific embodiments with similar methods. As long as they do not deviate from the structure of the present utility model or exceed the scope defined by the claims, they shall fall within the scope of protection of the present utility model.

Claims

1. A safe and controllable distributed power distribution automation terminal, comprising a main control module, an external communication module, and a measurement and control function module, characterized in that: The main control module has a built-in real-time core, a communication core and a shared memory, and the real-time core and the communication core are electrically connected to the shared memory; the measurement and control function module is electrically connected to the corresponding input and output ends of the real-time core, and the external communication module is electrically connected to the corresponding output end of the communication core.

2. A safe and controllable distributed distribution automation terminal according to claim 1, characterized in that: The external communication module is electrically connected to the corresponding output end of the communication core through the security encryption module.

3. The safe and controllable distributed distribution automation terminal according to claim 1, characterized in that: The measurement and control function module includes an analog quantity acquisition unit, a relay protection logic processing unit, a switch quantity control unit and a fault recording module. The analog quantity acquisition unit, the relay protection logic processing unit, the switch quantity control unit and the fault recording module are electrically connected to the input and output ends of the real-time core through a communication interface.

4. The safe and controllable distributed distribution automation terminal according to claim 3, characterized in that: The communication interface includes an Ethernet interface and a serial interface.

5. The safe and controllable distributed distribution automation terminal according to claim 3, characterized in that: The measurement and control function module also includes a display module, which is electrically connected to the corresponding output terminal of the real-time core.

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