Valve cooling control system based on domestic chip

Abstract

The invention relates to a valve cooling control system based on a domestic chip, the valve cooling control system comprises a control case and an IO case, a six-slot backboard is arranged in the control case, and a power supply module, a CPU module, a synchronization module and two Cink master station communication modules are installed on the six-slot backboard in a hot plug mode; an eleven-slot backboard is arranged in the IO case, a slave station communication module, three DI switching value input modules, three DO switching value output modules, an AI analog quantity input module, an AO analog quantity output module and an RTU expansion module are installed on the eleven-slot backboard, and an NC reserved position is vacant on the eleven-slot backboard. The control equipment and the IO equipment of the system all adopt domestic chips and electronic elements, so that the operation cost is reduced, the dependence on external supply is reduced, the independent innovation capability of China in the field of direct-current power transmission is improved, and technical breakthrough is realized.

Description

Technical Field

[0001] The present invention relates to the technical field of direct current power transmission, and in particular to a valve cooling control system based on a domestically produced chip. Background Art

[0002] In the HVDC transmission project, the converter valve water cooling equipment is an important auxiliary equipment in the HVDC transmission system. The stability of the valve cooling equipment plays an extremely important role in the safe and stable operation of the HVDC transmission system. The control system in the valve cooling equipment is a very critical and important sub-item equipment in the whole set of valve cooling equipment. It monitors the operating status of the equipment and directly affects the operating stability and reliability of the valve cooling equipment. The valve cooling control system with independent research and development and localized accessories and independent controllability has practical strategic significance in domestic and international market competition. Summary of the invention

[0003] The technical problem to be solved by the present invention is: to provide a valve cooling control system based on domestic chips, whose control equipment and IO equipment all use domestic chips and electronic components, which can perfectly replace foreign control equipment such as Siemens S7-400 series PLC, which not only reduces operating costs and reduces dependence on external supply, but also enhances my country's independent innovation capabilities in the field of DC transmission. While achieving technological breakthroughs, it occupies a more advantageous position in domestic and international market competition.

[0004] The valve cooling control system based on domestically produced chips includes a control chassis and an IO chassis, wherein the control chassis is provided with a six-slot backplane, and a power module, a CPU module, a synchronization module, and two Clink master communication modules are installed in a hot-swappable manner on the six-slot backplane, and an NC reserved position is left vacant on the six-slot backplane; the IO chassis is provided with an eleven-slot backplane, and a slave communication module, three DI switch input modules and three DO switch output modules, an AI analog input module and an AO analog output module, and an RTU extension module, an NC reserved position is left vacant on the eleven-slot backplane; the CPU module is bidirectionally connected to the synchronization module and the Clink master station communication module through the serial port bus on the six-slot backplane, the power module is connected to the CPU module, the synchronization module, the Clink master station communication module, and the eleven-slot backplane through the power supply line on the six-slot backplane and supplies power to them, the station communication module, the DI switch input module and the DO switch output module, the AI ​​analog input module and the AO analog output module, and the RTU extension module are powered by the eleven-slot backplane.

[0005] Specifically, the CPU module adopts the Loongson LS2K1000i processor.

[0006] Specifically, the synchronization module adopts the FMQL100 synchronization module.

[0007] Specifically, the Clink master station communication module adopts the FMQL100 communication module.

[0008] Specifically, the power module adopts a single-module dual-channel redundant input power module, whose input voltage is 18-30VDC, and the output voltage includes +24VDC, ±15VDC, and +5VDC. The output voltage provides working voltage for each module in the control chassis and IO through a six-slot backplane and an eleven-slot backplane.

[0009] Specifically, the slave station communication module adopts the Allwinner H6 communication module.

[0010] Specifically, the DI switch input module adopts a DI interface module integrated with a GD32F407 single-chip microcomputer; the DO switch output module adopts a DO interface module integrated with a GD32F407 single-chip microcomputer.

[0011] Specifically, the AI ​​analog input module adopts an AI interface module integrated with an ARM+FPGA control architecture; the AO analog output module adopts an AI interface module integrated with an ARM+FPGA control architecture.

[0012] Specifically, the RTU expansion module adopts a four-way RSRTU interface module integrated with a GD32F205 single-chip microcomputer.

[0013] The present invention provides a valve cooling control system based on domestic chips, wherein the control equipment and IO equipment all adopt domestic chips and electronic components, and can perfectly replace foreign control equipment such as Siemens S7-400 series PLC, thereby not only reducing the operation cost and the dependence on external supply, but also improving my country's independent innovation capability in the field of DC power transmission, and occupying a more advantageous position in the domestic and foreign market competition while achieving technological breakthroughs. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The following is a further description of a valve cooling control system based on a domestic chip of the present invention in conjunction with the accompanying drawings:

[0015] Figure 1 This is a schematic diagram of the logic structure and connection principle of the valve cooling control system based on the domestically produced chip;

[0016] Figure 2 This is a reference diagram of the control principle of the use status of the valve cooling control system based on the domestically produced chip;

[0017] Figure 3 This is a schematic diagram of the communication principle of the CPU module in the valve cooling control system based on the domestic chip;

[0018] Figure 4 This is a schematic diagram of the communication between the valve cooling control system based on the domestically produced chip and the protection device in the valve cooling equipment when in use;

[0019] Figure 5 This is a schematic diagram of the soft message communication between the valve cooling control system based on the domestic chip and the OWS background in the valve cooling device in the valve cooling device when in use;

[0020] Figure 6 This is a schematic diagram of the hard-connect cross-communication between the valve cooling control system based on the domestic chip and the DC control and protection unit in the valve cooling equipment when in use;

[0021] Figure 7 This is a schematic diagram of the control flow of the valve cooling equipment by the valve cooling control system based on the domestically produced chip in the running state.

[0022] Figure 8 This is a schematic diagram of the Fuzzy-PID algorithm used by the valve cooling control system based on domestically produced chips to control the valve cooling equipment in operation.

[0023] In the figure:

[0024] 1-control chassis; 11-six-slot backplane, 12-power module, 13-CPU module, 14-synchronization module, 15-Clink master station communication module;

[0025] 2-IO chassis; 21-eleven-slot backplane, 22-slave communication module, 23-DI switch input module, 24-DO switch output module, 25-AI analog input module, 26-AO analog output module, 27-RTU expansion module. DETAILED DESCRIPTION

[0026] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0027] In the description of the present invention, it should be understood that the terms "left", "right", "front", "back", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present invention.

[0028] The technical solution of the present invention is further described below with specific embodiments, but the protection scope of the present invention is not limited to the following embodiments.

[0029] Implementation method 1: Figure 1 As shown, the valve cooling control system based on the domestic chip includes a control chassis and an IO chassis, wherein the control chassis 1 is provided with a six-slot backplane 11, and a power module 12, a CPU module 13, a synchronization module 14, and two Clink master station communication modules 15 are installed in a hot-swappable manner on the six-slot backplane 11, and an NC reserved position is left vacant on the six-slot backplane 11; the IO chassis 2 is provided with an eleven-slot backplane 21, and a slave station communication module 22, three DI switch input modules 23 and three DO switch output modules 24, an AI analog input module 25 and an AO analog output module 26, an RT U expansion module 27, an NC reserved position is left vacant on the eleven-slot backplane 21; the CPU module 13 is bidirectionally connected to the synchronization module 14 and the Clink master station communication module 15 through the serial port bus on the six-slot backplane 11, the power module 12 is connected to the CPU module 13, the synchronization module 14, the Clink master station communication module 15, and the eleven-slot backplane 21 through the power supply line on the six-slot backplane 11 and supplies power to them, the station communication module 22, the DI switch input module 23 and the DO switch output module 24, the AI ​​analog input module 25 and the AO analog output module 26, and the RTU expansion module 27 draw power from the eleven-slot backplane 21.

[0030] Implementation 2: The CPU module 13 of the valve cooling control system based on domestic chips adopts the Loongson LS2K1000i processor. The domestic chip Loongson LS2K1000i processor has two 64-bit processor cores, a main frequency of 1.0GHz, a 64-bit DDR3 controller, and various system IO interfaces. The hot-swappable board-type CPU module controls the synchronization module through the serial bus on the six-slot backplane to achieve dual redundancy; at the same time, the bus controls the master station communication module to complete data communication with the IO chassis and system protection device. The synchronization module 14 adopts the FMQL100 synchronization module. Fudan Micro's FMQL100 synchronization module adopts a PSOC architecture 4-core Cortex-A53 processor with a main frequency of 1GHZ. It has powerful computing power and is suitable for high-speed real-time signal processing fields such as radar, communication, image and electronic countermeasures. The board expands 2 SFP optical modules with PHY, which can exchange real-time data with the synchronization module in the slave station control chassis through optical fiber to achieve dual redundant switching function. The Clink master station communication module 15 adopts the FMQL100 communication module. Fudan Micro's FMQL100 communication module also adopts Fudan Micro's PSOC architecture processor, with 2 Gigabit Ethernet PHY transceivers on board, and 2 extended Ethernet interfaces, connected to the slave station communication module in the IO chassis, to read and write various interface boards. The power module 12 adopts a single-module dual-channel redundant input power module, with an input voltage of 18-30VDC, and output voltages including +24VDC, ±15VDC, and +5VDC. The output voltage provides working voltage for the control chassis and each module in the IO through the six-slot backplane 11 and the eleven-slot backplane 21. The remaining structures and components are as described in Implementation 1 and will not be repeated.

[0031] Implementation 3: The slave communication module 22 of the valve cooling control system based on domestic chips adopts the Allwinner H6 communication module. The Allwinner H6 communication module adopts a quad-core 64-bit, 1.5GHz high-performance Cortex-A53 processor, with 2 Gigabit Ethernet PHY transceivers on board, and 2 extended Ethernet interfaces. It is connected to the Clink master communication module in the control chassis, receives control commands and data communications from the control system CPU, and communicates data with the DI, DO, AI, and AO boards through the serial port bus on the eleven-slot backplane. The DI switch input module 23 adopts a DI interface module integrated with the GD32F407 single-chip microcomputer; the DO switch output module 24 adopts a DO interface module integrated with the GD32F407 single-chip microcomputer. The DI switch input module uses GigaDevice's GD32F407 as the controller, communicates with the slave communication device, and periodically uploads DI channel data; the DI device has a total of 32 channels, the signal type is leakage type, the high level voltage range is 15-30VDC, and the low level voltage range is 0-5VDC. The DO switch input module uses GigaDevice's GD32F303 microcontroller as the controller, communicates with the slave communication device, receives the control system CPU command, and configures the DO channel status; the DO device has a total of 32 channels, the channel type is MOS, and the output delay time is 1ms. The AI ​​analog input module 25 adopts an AI interface module integrated with an ARM+FPGA control architecture; the AO analog output module 26 adopts an AI interface module integrated with an ARM+FPGA control architecture. In the ARM+FPGA control architecture of the AI ​​analog input module, the ARM uses GigaDevice's GD32F407 MCU, the FPGA uses Guangdong Gaoyun Semiconductor Technology's GW1N-UV9UG169C6I5 MCU, and the analog-to-digital chip uses Shengbang Micro's SGM51622S8, 8-way synchronous sampling input, 16-bit AD sampling accuracy, 200KSPS sampling rate; used to communicate with the slave communication device and periodically upload AI channel data. The AI ​​device has a total of 8 channels, and the input signal type can be configured as voltage or current, with a voltage range of 0-10V and a current range of 0-20mA and 4-20mA. In the ARM+FPGA control architecture of the AO analog output module, the ARM uses the GD32F407 microcontroller from GigaDevice, the FPGA uses the GW1N-UV9UG169C6I5 microcontroller from Guangdong Gaoyun Semiconductor Technology, and the analog-to-digital chip uses the CL4668 from Core Interconnect, with 8-way synchronous output, 16-bit AD sampling accuracy, and 20us conversion time; it is used to communicate with the slave communication device, receive control system commands, and configure each channel output. The output signal type can be selected as voltage or current, with a voltage range of 0-10V and a current range of 0-20mA and 4-20mA. The RTU expansion module 27 uses a four-way RSRTU interface module integrated with a GD32F205 microcontroller.The RTU expansion module uses GigaDevice's GD32F205 microcontroller as the controller and is equipped with 4 RSRTU interfaces for expanding MODBUS communication. The remaining structures and components are as described in Implementation 1 and will not be described again.

[0032] When using: Figure 2 , 3 As shown, this system is connected to the protection device in the valve cooling equipment through communication. The valve cooling protection device is configured in a triple manner. This control system communicates with the protection device in real-time redundancy, thereby realizing the protection function of the valve cooling system. Figure 4 As shown, the specific communication connection method is as follows: important sensors involved in tripping are configured with three redundancies and connected to protection devices respectively, and the protection devices send the sensor signals collected by each to two sets of systems A and B at the same time; the remaining sensors are configured with two redundancies and sent to the AI ​​modules of systems A and B respectively. The redundant sensor power supplies are independently powered by the DC24V of the control systems A and B of the systems respectively. The cold water control device in the converter valve and the power supply of each sensor are powered by two sets of power supplies at the same time. The loss of power to any power supply will not affect the stable operation of the control and the sensor. The valve cooling control device can determine whether the sensor is faulty based on the sensor measurement value, and the faulty sensor can automatically exit operation. The multi-sensor redundant configuration method can effectively avoid the failure of a single component causing the protection to refuse to operate or malfunction. Figure 5 As shown, this system communicates with the OWS backend and control system in the valve cooling equipment through soft messages to achieve monitoring and management of the valve cooling system. Figure 6 As shown, this system conducts hard contact cross-communication with the DC control and protection unit in the valve cooling equipment to achieve control and protection of the on-site equipment.

[0033] During operation: The control methods of this system for cold-generating equipment include start-stop control, main-standby system switching control, algorithm control, and trip protection control. The implementation of each control method is as follows:

[0034] M1-Start-Stop Control: Figure 7 As shown in the figure, when the converter valve is not unlocked, the valve cooling control system can be started and stopped locally through the valve cooling start and valve cooling stop buttons on the human-machine interface. After automatic start, the water cooling control system monitors the operating status of the water cooling system and detects system faults according to the set parameters. In this mode, the control system automatically controls the inlet valve temperature, issues a real-time alarm for the exceeding of the valve cooling system parameters, and automatically issues a trip request signal when the parameters seriously exceed the standard and may affect the safe operation of the converter valve. In this mode, electrical equipment such as the main circulation pump, electric heater, spray pump, cooling fan, bypass filter circulation pump, dosing pump, external cooling water supply electric switch valve, and internal cooling water supply electric switch valve are automatically controlled by the control system according to the actual working environment; communication with the host computer continues to be maintained, and the status of the electrical equipment in the operating mode is reflected to the pole control system through communication.

[0035] M2- Main and standby system switching control: handles the main and standby switching logic of the redundant control system. When the main system fails, it can quickly switch to the standby system and ensure that there is no disturbance to the equipment and no tripping output signal during the system switching process.

[0036] M3-algorithm control: Figure 8 As shown in the figure, the system starts and stops the spray pump, cooling tower fan, air cooler fan and other external cooling equipment, and adjusts the frequency to control the inlet valve temperature within a stable range. The frequency adjustment adopts the Fuzzy PID algorithm, which combines the advantages of PID control and fuzzy logic control. It has the characteristics of robustness, adaptability, dynamic response, small overshoot, easy implementation, suitable for complex systems, improved steady-state performance and flexible parameter setting, which makes it show strong capabilities and broad application prospects in the control of nonlinear, uncertain and time-varying systems.

[0037] M4-tripping protection control: The valve cooling control system in duty state receives the valve cooling protection signal, and after judging two out of three, it directly exports it to the DC control system without switching the system.

[0038] This valve cooling control system based on domestic chips uses domestic chips and electronic components in its control equipment and IO equipment, which can perfectly replace foreign control equipment such as Siemens S7-400 series PLC. It not only reduces operating costs and reduces dependence on external supply, but also enhances my country's independent innovation capabilities in the field of DC transmission. While achieving technological breakthroughs, it occupies a more advantageous position in domestic and international market competition.

[0039] The above description shows the main features, basic principles, and advantages of the present invention. It is obvious to those skilled in the art that the present invention is not limited to the details of the above exemplary embodiments or embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention. Therefore, the above embodiments or embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is defined by the attached claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims are included in the present invention. Any figure mark in the claims should not be regarded as limiting the claims involved.

[0040] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A valve cooling control system based on a domestically produced chip, characterized by: It includes control chassis and IO chassis, among which, The control chassis (1) is provided with a six-slot backplane (11), and a power module (12), a CPU module (13), a synchronization module (14), and two Clink master station communication modules (15) are installed on the six-slot backplane (11) in a hot-swappable manner, and an NC reserved position is left vacant on the six-slot backplane (11); the IO chassis (2) is provided with an eleven-slot backplane (21), and a slave station communication module (22), three DI switch input modules (23) and three DO switch output modules (24), an AI analog input module (25) and an AO analog output module (26), and an RTU expansion module (27) are installed on the eleven-slot backplane (21), and an NC reserved position is left vacant on the eleven-slot backplane (21); The CPU module (13) is bidirectionally connected to the synchronization module (14) and the Clink master station communication module (15) via the serial port bus on the six-slot backplane (11); the power module (12) is connected to the CPU module (13), the synchronization module (14), the Clink master station communication module (15), and the eleven-slot backplane (21) via the power supply line on the six-slot backplane (11) and supplies power to them; the station communication module (22), the DI switch input module (23), the DO switch output module (24), the AI ​​analog input module (25), the AO analog output module (26), and the RTU expansion module (27) draw power from the eleven-slot backplane (21).

2. According to the valve cooling control system based on the domestic chip according to claim 1, it is characterized by: The CPU module (13) adopts the Loongson LS2K1000i processor.

3. The valve cooling control system based on the domestic chip according to claim 2 is characterized in that: The synchronization module (14) adopts the FMQL100 synchronization module.

4. The valve cooling control system based on the domestic chip according to claim 3 is characterized in that: The Clink master station communication module (15) adopts the FMQL100 communication module.

5. The valve cooling control system based on the domestic chip according to claim 4 is characterized in that: The power module (12) adopts a single-module dual-channel redundant input power module, whose input voltage is 18-30VDC, and the output voltage includes +24VDC, ±15VDC, and +5VDC. The output voltage provides working voltage for each module in the control chassis and IO through a six-slot backplane (11) and an eleven-slot backplane (21).

6. The valve cooling control system based on the domestic chip according to claim 5 is characterized in that: The slave station communication module (22) adopts the Allwinner H6 communication module.

7. The valve cooling control system based on the domestic chip according to claim 6 is characterized in that: The DI switch quantity input module (23) adopts a DI interface module integrated with a GD32F407 single chip microcomputer; the DO switch quantity output module (24) adopts a DO interface module integrated with a GD32F407 single chip microcomputer.

8. The valve cooling control system based on the domestic chip according to claim 7 is characterized in that: The AI ​​analog quantity input module (25) adopts an AI interface module integrated with an ARM+FPGA control architecture; the AO analog quantity output module (26) adopts an AI interface module integrated with an ARM+FPGA control architecture.

9. The valve cooling control system based on the domestic chip according to claim 8 is characterized in that: The RTU expansion module (27) adopts a four-way RSRTU interface module integrated with a GD32F205 single-chip microcomputer.

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