System mainboard of relay protection device

Abstract

The utility model relates to a relay protection device system mainboard, and relates to the field of relay protection systems, and the relay protection device system mainboard comprises a power supply management module; the analog quantity sampling module comprises an independent eight-channel ADC (Analog to Digital Converter) controller, the sampling precision of the ADC controller is 16 bits, and the ADC controller is used for improving the sampling precision and synchronism of input analog quantity; the processor module comprises an ARM32-bit processor with a floating point unit and is used for protecting reliable calculation of data and management tasks such as a man-machine interface, communication and system maintenance, and the input end of the ARM32-bit processor is in communication connection with the output end of the ADC controller; and the communication module comprises a CAN (Controller Area Network) communication interface and is used for exchanging data with an external intelligent IO (Input / Output) plug-in. The relay protection device has the advantage that the sensitivity and the reliability of the relay protection device are improved.

Description

Technical Field

[0001] The present application relates to the field of relay protection systems, and in particular to a relay protection device system mainboard. Background Art

[0002] In the power system, microcomputer-based relay protection devices are one of the key devices to ensure the safe and stable operation of the power grid. With the continuous improvement of the voltage level of the power system transmission system, the performance requirements of relay protection devices are also getting higher and higher. The power system transmission system can be roughly divided into ultra-high voltage, high voltage, medium and low voltage, etc. according to the voltage level. Most of the relay protection used in environments above the high voltage level is relatively expensive, so the design of the relay protection device system motherboard can be free from the limitation of hardware cost. However, in medium and low voltage power systems, due to the limitation of cost factors, the design of microcomputer protection needs to consider both performance and cost. At present, most medium and low voltage relay protection system motherboards on the market adopt a single controller architecture with simple peripherals to reduce costs. However, this design also brings a series of problems.

[0003] First, these systems generally lack independent AD (analog-to-digital converter) devices. Usually, they rely on the CPU processor's own AD controller for sampling, and these AD controllers have low sampling accuracy. The low sampling accuracy seriously affects the measurement accuracy of the relay protection device, thereby reducing its sensitivity and protection performance.

[0004] Secondly, some MCUs do not include floating point units in their designs. This results in the system having to use fixed point operations when dealing with calculations involving floating point numbers. Although fixed point operations can reduce hardware costs, they have large errors when dealing with complex mathematical operations and algorithms, further reducing the protection performance of relay protection devices.

[0005] In summary, the mainboard of the medium and low voltage relay protection system in the related art has the defects of poor sensitivity and protection performance. Summary of the invention

[0006] The utility model aims to provide a high-performance relay protection device system mainboard with a floating-point processing unit, aiming to solve the problems existing in the prior art and improve the sensitivity and reliability of the relay protection device.

[0007] The present application provides a relay protection device system mainboard adopts the following technical solution:

[0008] A relay protection device system mainboard, comprising:

[0009] The power management module supplies power to the entire system motherboard through the power bus;

[0010] An analog quantity sampling module (2) comprises an independent eight-channel ADC controller, the sampling accuracy of the ADC controller is 16 bits, and the ADC controller is used to collect the voltage and / or current of the power transmission system and convert it into an analog quantity digital signal;

[0011] A processor module, comprising an ARM32-bit processor with a floating point unit, wherein an input end of the ARM32-bit processor is communicatively connected to an output end of the ADC controller;

[0012] Communication module, including CAN communication interface, intelligent IO plug-in bidirectional communication connection with ARM32-bit processor through CAN communication network;

[0013] The ARM32-bit processor receives the analog digital signal output by the ADC controller and the external input and output change signal input by the intelligent IO plug-in to process and obtain configuration data, and then outputs the relay configuration data to the intelligent IO plug-in, thereby driving the relay to trip and close.

[0014] Optionally, a data storage module is also included, which is connected to the processor module via a signal line and is used to adapt to complex data storage requirements.

[0015] Optionally, the data storage module includes a static memory SRAM, a power-off retention flash memory NorFlash and a NandFlash which are communicatively connected to the processor module via a signal line.

[0016] Optionally, the data storage module also includes a ferroelectric memory FRAM and SPIFlash based on a high-speed serial port SPI, which is communicatively connected to the processor module via a signal line.

[0017] Optionally, an encryption module is also included, which is connected to the processor module via a signal line, and is used to perform hardware encryption and decryption processing when the processor module sends and receives data.

[0018] Optionally, the encryption module includes a hard encryption chip.

[0019] Optionally, the processor module is connected to an input / output module via a signal line, and the input / output module includes a GPIO interface for connecting to an external device and a plurality of network ports.

[0020] In summary, the present application includes at least one of the following beneficial technical effects:

[0021] 1. Improve sampling accuracy and synchronization: The mainboard of the relay protection device system uses an independent eight-channel ADC controller, and the sampling accuracy of the ADC controller is as high as 16 bits. This design significantly improves the sampling accuracy of the input analog quantity, thereby improving the measurement accuracy of the relay protection device. At the same time, the independent ADC controller can also ensure the sampling synchronization between each channel, further enhancing the sensitivity and reliability of the relay protection device.

[0022] 2. Enhanced data processing capability: The mainboard is equipped with an ARM32-bit processor with a floating-point unit. The presence of the floating-point unit enables the processor to efficiently and accurately process complex mathematical operations and algorithms involving floating-point numbers, thereby avoiding the errors caused by fixed-point operations. This design not only improves the speed and accuracy of data processing, but also enhances the protection performance of the relay protection device, enabling it to respond to abnormal conditions in the power system more quickly and accurately.

[0023] 3. Flexible data storage and communication capabilities: The system motherboard is equipped with a variety of data storage modules, including static memory SRAM, power-off retention flash memory NorFlash and NandFlash, and ferroelectric memory FRAM and SPIFlash based on high-speed serial port SPI. The existence of these storage modules enables the system to adapt to complex data storage needs and ensure the integrity and reliability of data. At the same time, the motherboard is also equipped with a CAN communication interface and multiple network ports, as well as a GPIO interface connected to external devices. The existence of these communication interfaces enables the system to easily exchange data with external intelligent IO plug-ins and transmit input and output status data in real time. This design not only enhances the communication capability of the system, but also improves the flexibility and scalability of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a schematic diagram of the main board of the relay protection system in the prior art;

[0025] Figure 2 It is a schematic diagram of the external encryption method of the communication of the mainboard of the relay protection system in the prior art;

[0026] Figure 3 It is a schematic diagram of the input and output mode of the main board of the relay protection system in the prior art;

[0027] Figure 4 It is a schematic diagram of the main board of the relay protection system in this application;

[0028] Figure 5 It is a schematic diagram of the external encryption method of the communication of the mainboard of the relay protection system in this application;

[0029] Figure 6It is a schematic diagram of a communication module based on a CAN communication network of a mainboard of a relay protection system in the present application.

[0030] Explanation of the accompanying drawings: 1. Power management module; 2. Analog sampling module; 3. Processor module; 4. Communication module; 5. Data storage module; 6. Encryption module; 7. Input and output module. DETAILED DESCRIPTION

[0031] The following is combined with Figure 4-6 This application is described in further detail.

[0032] The embodiment of the present application discloses a mainboard of a relay protection device system. Figure 4 A relay protection device system mainboard includes a power management module 1, an analog sampling module 2, a processor module 3, a communication module 4, a data storage module 5, an encryption module 6 and an input and output module 7.

[0033] The power management module 1 is the power supply center of the entire system motherboard. The power management module 1 provides stable and reliable power to other modules through the power bus. The power management module 1 also has overvoltage, overcurrent and other protection functions to ensure the safe and stable operation of the system motherboard.

[0034] The analog sampling module 2 includes an independent eight-channel ADC controller, and the sampling accuracy of the ADC controller reaches 16 bits. The input end of the ADC controller is connected to the processor module 3 through a signal line. The ADC controller is responsible for converting the collected analog signals (such as voltage, current, etc.) into digital signals so as to transmit the sampled data to the processor module 3 in real time.

[0035] The processor module 3 is the core part of the system motherboard. The processor module 3 includes an ARM32-bit processor with a floating-point unit. The processor has powerful floating-point computing and data processing capabilities, and can realize fast and accurate processing of sampled data. The input end of the ARM32-bit processor is connected to the output end of the ADC controller through a signal line communication, receiving sampled data in real time and performing protection and calculation. At the same time, the processor is also responsible for management tasks such as human-machine interface, communication, and system maintenance.

[0036] The communication module 4 includes a CAN communication interface for exchanging data with an external intelligent IO plug-in. The intelligent IO plug-in is connected to the ARM32-bit processor via the CAN communication network to transmit input and output status data in real time. The CAN communication method has the advantages of high reliability, high real-time performance and strong scalability, and can meet the requirements of the relay protection device for communication performance.

[0037] The data storage module 5 includes a static memory SRAM, a power-off-retained flash memory NorFlash and NandFlash, and a ferroelectric memory FRAM and SPIFlash based on a high-speed serial port SPI. The static memory SRAM, the power-off-retained flash memory NorFlash and NandFlash, and the ferroelectric memory FRAM and SPIFlash based on a high-speed serial port SPI are respectively connected to the processor module 3 through signal lines for storing system programs, configuration parameters, operating data, etc. Among them, SRAM has the characteristics of fast reading and writing speed, and is suitable for storing data that needs to be accessed frequently; NorFlash and NandFlash have the characteristics of large capacity and low cost, and are suitable for storing system programs and configuration parameters; FRAM and SPIFlash have the characteristics of non-volatility, and data can be kept from being lost even in the case of power failure.

[0038] The encryption module 6 is connected to the processor module 3 through a signal line, and is used to perform hardware encryption and decryption processing when the processor module 3 sends and receives data. The encryption function is realized by using a hard encryption chip, which has the advantages of fast encryption and decryption speed and high security. By encrypting the communication data through the encryption module 6, the security and integrity of the communication data can be effectively protected.

[0039] The input / output module 7 includes a GPIO interface for connecting to external devices and multiple network ports. The GPIO interface supports the access and control of multiple peripherals; the network port is used to realize the communication connection between the system mainboard and the host computer and other network devices. Through the input / output module 7, the system mainboard can exchange data and communicate with external devices.

[0040] The power management module 1 supplies power to the entire system mainboard through the power bus; the input end of the ARM32-bit processor is connected to the output end of the ADC controller through a signal line communication, receiving sampled data in real time and performing protection and calculation; the CAN communication interface in the communication module 4 is connected to the processor module 3 through a signal line; the data storage module 5, the encryption module 6 and the input and output module 7 are respectively connected to the processor module 3 through signal lines; the GPIO interface and the network port are used to connect to external devices.

[0041] The ADC controller transmits the sampled data to the processor module 3 through the data bus; after the processor module 3 processes and analyzes the sampled data, it communicates and exchanges with the external intelligent IO plug-in through the communication module 4; the data storage module 5 is used to store system programs, configuration parameters, operating data, etc.; the encryption module 6 performs hardware encryption and decryption processing when the processor module 3 sends and receives data; the input and output module 7 interacts with external devices and performs communication control through the GPIO interface and the network port.

[0042] The implementation principle of a relay protection device system motherboard in an embodiment of the present application is as follows: the power management module 1 provides stable and reliable power to the entire system motherboard through the power bus, ensuring that each module of the system operates under a stable working voltage. At the same time, the power management module 1 also has protection functions such as overvoltage and overcurrent to prevent system damage or failure caused by power supply abnormalities, and ensure the safe and stable operation of the system motherboard. The analog sampling module 2 adopts an independent eight-channel ADC controller with a sampling accuracy of 16 bits, ensuring high-precision acquisition of analog signals (such as voltage, current, etc.). This high-precision sampling provides an accurate data basis for subsequent data processing and improves the measurement accuracy and sensitivity of the relay protection device. The processor module 3, as the core of the system motherboard, adopts an ARM32-bit processor with a floating-point unit. This processor not only has powerful floating-point computing capabilities, but also has fast data processing capabilities. It can receive the sampled data transmitted by the ADC controller in real time, and perform fast and accurate processing and analysis. The ARM32-bit processor receives the analog digital signal output by the ADC controller, performs data processing and analysis, and then outputs the relay configuration data to the external intelligent IO plug-in in combination with the external input and output change signal input by the external intelligent IO plug-in, so as to drive the relay to jump and close. At the same time, the processor is also responsible for management tasks such as human-machine interface, communication, and system maintenance, realizing the intelligent and automated management of the system motherboard. The communication module 4 adopts the CAN communication interface to exchange data with the external intelligent IO plug-in with high reliability, high real-time and strong scalability. This communication mode ensures real-time communication and data sharing between the system motherboard and external devices, and improves the overall performance and response speed of the system. The data storage module 5 adopts various types of memory, including SRAM, NorFlash, NandFlash, FRAM and SPIFlash. These memories have different characteristics and advantages, respectively, and can meet the system's storage requirements for different types of data such as programs, configuration parameters, and operating data. At the same time, through a reasonable storage management strategy, efficient use and fast access to data can be achieved. The encryption module 6 uses a hard encryption chip to implement data encryption and decryption processing, ensuring the security and integrity of the communication data. By encrypting the data through the encryption module 6, it is possible to effectively prevent the data from being illegally stolen or tampered with, thereby ensuring the data security of the system. The input and output module 7 performs data interaction and communication control with external devices through the GPIO interface and the network port. The GPIO interface supports the access and control of a variety of peripherals, and the network port is used to realize the communication connection between the system mainboard and the host computer and other network devices. This design makes the connection between the system mainboard and external devices more convenient and flexible. In summary, this technical solution significantly improves the performance, safety and reliability of the relay protection device system mainboard by improving sampling accuracy, optimizing data processing, achieving reliable communication, flexible data storage, protecting data security, and providing convenient input and output interfaces.

[0043] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A relay protection device system motherboard, characterized in that: include: A power management module (1) supplies power to the entire system mainboard via a power bus; An analog quantity sampling module (2) comprises an independent eight-channel ADC controller, the sampling accuracy of the ADC controller is 16 bits, and the ADC controller is used to collect the voltage and / or current of the power transmission system and convert it into an analog quantity digital signal; A processor module (3), comprising an ARM 32-bit processor with a floating point unit, wherein an input end of the ARM 32-bit processor is communicatively connected to an output end of the ADC controller; The communication module (4) includes a CAN communication interface, and the intelligent IO plug-in is bidirectionally connected to the ARM32-bit processor via the CAN communication network; The ARM32-bit processor receives the analog digital signal output by the ADC controller and the external input / output change signal input by the intelligent IO plug-in to process and obtain configuration data, and then outputs the relay configuration data to the intelligent IO plug-in, thereby driving the relay to trip and close.

2. A relay protection device system mainboard according to claim 1, characterized in that: It also comprises a data storage module (5), the data storage module (5) being connected to the processor module (3) via a signal line, and the data storage module (5) being used to store the operation configuration data of the processor module (3).

3. A relay protection device system mainboard according to claim 2, characterized in that: The data storage module (5) comprises a static memory SRAM, a power-off retention flash memory NorFlash and a NandFlash, which are connected to the processor module (3) via signal lines.

4. A relay protection device system mainboard according to claim 3, characterized in that: The data storage module (5) also includes a ferroelectric memory FRAM and SPIFlash based on a high-speed serial port SPI, which are connected to the processor module (3) through signal lines.

5. A relay protection device system mainboard according to any one of claims 1 to 4, characterized in that: It also includes an encryption module (6), which is connected to the processor module (3) via a signal line, and is used to perform hardware encryption and decryption processing when the processor module (3) sends and receives data.

6. A relay protection device system mainboard according to claim 5, characterized in that: The encryption module (6) comprises a hard encryption chip.

7. A relay protection device system mainboard according to claim 1, characterized in that: The processor module (3) is connected to an input-output module (7) via a signal line, and the input-output module (7) comprises a GPIO interface for connecting to external devices and a plurality of network ports.

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