Control system for controlling distributed hydrogen energy power generation based on PLC

Abstract

The utility model provides a control system for controlling distributed hydrogen energy power generation based on a PLC. The control system comprises a power supply module, a system control module, a data acquisition module, an operation module, a switch, a conversion module and an execution mechanism. The power supply module is connected with the system control module, the operation module, the switch, the conversion module and the data acquisition module, the switch is in communication connection with the conversion module, the operation module and the system control module, the data acquisition module is in communication connection with the system control module, and the system control module is connected with the execution mechanism; wherein the data acquisition module transmits each data to the operation module, so that the operation module is used for operating a control requirement instruction; and the system control module is used for receiving an instruction from the operation module so as to control the operation of the execution mechanism. By adopting the PLC as a system control core, the stability and reliability of the hydrogen energy power generation system can be remarkably improved, and meanwhile, the maintenance cost and the operation complexity are reduced.

Description

TECHNICAL FIELD

[0001] The application relates to the field of hydrogen energy power generation, in particular to a PLC control distributed hydrogen energy power generation control system. BACKGROUND

[0002] Hydrogen energy power generation technologies mainly include fuel cells, hydrogen gas turbines, hydrogen internal combustion engines, etc. Among them, fuel cell technology is attracting attention due to its high efficiency and low emissions, especially in transportation and distributed power supply systems. The current research and development focuses on improving hydrogen energy conversion efficiency, reducing costs, and improving system stability and durability. The progress of material science is constantly promoting the improvement of hydrogen fuel cell performance.

[0003] In terms of control schemes for hydrogen energy power generation systems, the current commonly used control architecture is based on single-chip microcomputers. In this architecture, the single-chip microcomputer serves as the central processing unit, responsible for processing sensor data, executing control algorithms, and driving actuators. The host computer or dedicated remote terminal serves as the display and remote control interface, communicating with the single-chip microcomputer through the host computer to realize monitoring and management of the system. Although the host computer provides the convenience of remote monitoring, its user interface is usually not intuitive, and modification and customization require professional technology, which increases the complexity of operation and maintenance costs. In addition, single-chip microcomputers lack resistance and may fail in harsh environments, although they can also work in such environments, but usually require additional protection measures such as protective housings or special packaging technologies to ensure stability and reliability, which increases the cost and complexity of the system and limits the performance optimization and intelligent management of the hydrogen energy power generation system.

[0004] Therefore, it is necessary to provide a PLC control distributed hydrogen energy power generation control system that can maintain high resistance and be directly modified when needed. INVENTION CONTENTS

[0005] Therefore, it is necessary to provide a PLC control distributed hydrogen energy power generation control system that can maintain high resistance and be directly modified when needed.

[0006] The embodiment of the application provides a PLC control distributed hydrogen energy power generation control system, which comprises a power supply module, a system control module, a data acquisition module, an operation module, a switch, a conversion module and an actuator.

[0007] The power supply module is connected with the system control module, the operation module, the switch, the conversion module and the data acquisition module, the switch is in communication connection with the conversion module, the operation module and the system control module, the data acquisition module is in communication connection with the system control module, and the system control module is connected with the actuator.

[0008] The data collection module transmits each data to the operation module, so that the operation module is used for operating control requirement instruction.

[0009] The system control module is used for receiving instruction from the operation module, so as to control the work of the execution mechanism.

[0010] In at least one embodiment of the present application, the communication connection is an Ethernet line.

[0011] In at least one embodiment of the present application, the operation module is a touch screen, so that the touch screen is used as a control display terminal.

[0012] In at least one embodiment of the present application, the execution mechanism includes a pressure sensor, a temperature sensor, a back pressure valve, a shut-off valve, a trap valve, a hydrogen inlet total valve, a proportional valve and a thermostat, and the pressure sensor, the temperature sensor, the back pressure valve, the shut-off valve, the trap valve, the hydrogen inlet total valve, the proportional valve and the thermostat all act on the system control module.

[0013] In at least one embodiment of the present application, the data collection module includes a fuel cell unit, a power battery, an air compressor, a water pump, a hydrogen pump, a PTC heater and a DCL unit, and the fuel cell unit, the power battery, the air compressor, the water pump, the hydrogen pump, the PTC heater and the DCL unit are all connected to the system control module.

[0014] In at least one embodiment of the present application, the data collection module further includes a PCS unit, which is connected to a customer power grid and is used for communication with external equipment.

[0015] In at least one embodiment of the present application, the system control module has a 232 communication module, a 485 communication module and a digital quantity input and output module, and the 232 communication module and the 485 communication module are both in communication with the outside world.

[0016] In at least one embodiment of the present application, the control system further includes a gas supply path, a water supply path and a hydrogen supply path, and the gas supply path, the water supply path and the hydrogen supply path are respectively connected to the fuel cell unit; wherein the gas supply path has the pressure sensor, the temperature sensor and the air compressor to control air; the water supply path has the water pump, the PTC heater and the temperature sensor; and the hydrogen supply path has the shut-off valve, the proportional valve, the hydrogen pump, the temperature sensor and the pressure sensor.

[0017] In at least one embodiment of the present application, the conversion module is a CAN signal to TCP\IP protocol signal.

[0018] In at least one embodiment of the present application, the control system further comprises a master control module connected with the system control module.

[0019] The control system for distributed hydrogen energy power generation based on PLC provided above realizes distributed control of the system through the combination of the power supply module, the system control module, the data information module, the switch, the conversion module and the actuator; the PLC controller is set as the control core, has better tolerance and stability, is suitable for working in harsh environments, the programming and operation of the PLC are more convenient, and the operation complexity is reduced; through the setting of the operation module and the data acquisition module, real-time acquisition and processing of various sensor data are realized, various data are transmitted to the operation module to provide the instruction interface of the operation control requirement, and the easy editing of the operation module makes the system maintenance more convenient; the direct connection of the system control module and the actuator makes the system response more timely. By using the PLC as the control core, the stability and reliability of the hydrogen energy power generation system can be significantly improved, and the maintenance cost and operation complexity can be reduced. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 The figure is a structural block diagram of the control system for distributed hydrogen energy power generation based on PLC in the embodiment of the present application.

[0021] Figure 2 The figure is a path structure diagram of the fuel cell stack unit in the embodiment of the present application.

[0022] Figure 3 The figure is a control system block diagram of the control system for distributed hydrogen energy power generation based on PLC in the embodiment of the present application.

[0023] Figure 4 The figure is a structural block diagram of the system control module in the embodiment of the present application.

[0024] Explanation of main element symbols

[0025] 100, a control system for distributed hydrogen energy power generation based on PLC; 10, a power supply module; 20, a system control module; 30, a data acquisition module; 31, a fuel cell stack unit; 32, a power battery; 33, an air compressor; 34, a water pump; 35, a hydrogen pump; 36, a PTC heater; 37, a DCL unit; 38, a PCS unit; 40, an operation module; 50, a switch; 60, a conversion module; 70, an actuator; 71, a pressure sensor; 72, a temperature sensor; 73, a back pressure valve; 74, a shut-off valve; 75, a drain valve; 76, a hydrogen inlet master valve; 77, a proportional valve; 78, a thermostat; 80, a master control module. DETAILED DESCRIPTION

[0026] Clearly, only some of the embodiments of the application are described herein and all modifications that come within the scope of the application are reserved. Various embodiments of the application will be described in detail with reference to drawings, wherein:

[0027] It should be noted that when a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components can be present. When a component is referred to as being "positioned" on another component, it can be directly positioned on the other component or intervening components can be present. The terms "top", "bottom", "upper", "lower", "left", "right", "front", "rear", and the like as can be used herein are used for illustration only and are similarly understood in terms of relative positions and orientations.

[0028] The embodiment of the application provides a control system for PLC control of distributed hydrogen energy power generation, comprising: a power supply module, a system control module, a data acquisition module, an operation module, a switch, a conversion module and an actuator.

[0029] The power supply module is connected with the system control module, the operation module, the switch, the conversion module and the data acquisition module, the switch is in communication connection with the conversion module, the operation module and the system control module, the data acquisition module is in communication connection with the system control module, and the system control module is connected with the actuator.

[0030] The data acquisition module transmits various data to the operation module, so that the operation module is used for operating control requirement instructions.

[0031] The system control module is used for receiving instructions from the operation module to control the work of the actuator.

[0032] The control system for PLC control of distributed hydrogen energy power generation provided above realizes distributed control of the system by setting the organic combination of the power supply module, the system control module, the data information module, the switch, the conversion module and the actuator; the PLC controller is set as the control core, has better tolerance and stability, is suitable for working in harsh environments, the programming and operation of the PLC are more convenient, and the operation complexity is reduced; the real-time acquisition and processing of various sensor data are realized through the setting of the operation module and the data acquisition module, various data are transmitted to the operation module to provide an instruction interface of operation control requirements, meanwhile, the easy editing of the operation module makes the system maintenance more convenient; the direct connection of the system control module and the actuator makes the system response more timely.

[0033] Some embodiments of the application will be described in detail with reference to the drawings. In the case of no conflict, the embodiments described below and the features in the embodiments can be combined with each other.

[0034] According to Figures 1-4 , the embodiment of the application provides a control system 100 for controlling distributed hydrogen energy power generation based on PLC, which comprises a power supply module 10, a system control module 20, a data acquisition module 30, an operation module 40, a switch 50, a conversion module 60 and an actuator 70. The power supply module 10 is connected with the system control module 20, the operation module 40, the switch 50, the conversion module 60 and the data acquisition module 30. The switch 50 is in communication connection with the conversion module 60, the operation module 40 and the system control module 20. The data acquisition module 30 is in communication connection with the system control module 20. The system control module 20 is connected with the actuator 70. The data acquisition module 30 transmits various data to the operation module 40, so that the operation module 40 is used for operating control requirement instructions. The system control module 20 is used for receiving instructions from the operation module 40, so as to control the work of the actuator 70.

[0035] Specifically, in the first embodiment, the power supply module 10 works by low-voltage storage batteries and high-voltage power supply respectively. The power supply of the control system part is uniformly provided by the low-voltage storage batteries, so as to ensure stable power supply for the normal start and operation of the control system. When the control system starts, the hydrogen fuel cell stack starts to work and generates power. At this time, the power generated by the stack is used for the high-voltage power supply demand of the system, such as driving motors or other devices requiring higher voltage. The system control module 20 takes the PCL controller as the control core, and the operation module 40 is used as the display terminal. The various data of the data acquisition module 30 are transmitted to the operation module 40. When the various data are observed to be normal by the operation module 40, the operation instruction requirement is sent to the system control module 20. The system control module 20 receives the control requirement instructions of the display terminal, realizes the control requirement of the fuel cell stack work of the actuator 70, so that the system control module 20 directly issues instruction requirements, and the instructions are applied to the corresponding actuator 70, so that the system works more quickly.

[0036] In a specific embodiment, the communication connection is an Ethernet line.

[0037] Specifically, the real-time collected data are transmitted to the system control module 20 at high speed through the Ethernet line.

[0038] In a specific embodiment, the operation module 40 is a touch screen, so that the touch screen is used as the control display terminal.

[0039] Specifically, the touch screen is used as a control display terminal, allowing the user to interact with the control system through a graphical interface. The user can view the system status, parameter indicators, and manually control the start and stop of components and other operations on the touch screen. At the same time, editing and modification are performed through the touch screen.

[0040] Further, the touch screen displays real-time system status parameters such as pressure, temperature, power, etc. The operator inputs operation instructions such as starting / stopping the device, adjusting parameters, etc. through the touch screen, processes the input instructions, and transmits the instructions to the system control module 20 (PLC). At the same time, the status changes of the system are displayed in real time on the touch screen. The PLC controller controls the actuator 70 to perform corresponding operations according to the received instructions. At the same time, the system state is continuously monitored through the touch screen, and adjustments or maintenance are made as needed.

[0041] In a specific embodiment, the actuator 70 includes a pressure sensor 71, a temperature sensor 72, a back pressure valve 73, a shut-off valve 74, a trap valve 75, a hydrogen inlet master valve 76, proportional valves 77 and a thermostat 78. The pressure sensor 71, the temperature sensor 72, the back pressure valve 73, the shut-off valve 74, the trap valve 75, the hydrogen inlet master valve 76, the proportional valves 77 and the thermostat 78 all act on the system control module 20.

[0042] Specifically, the PLC controller is directly connected to the pressure sensor 71, the temperature sensor 72, the back pressure valve 73, the shut-off valve 74, the trap valve 75, the hydrogen inlet master valve 76, the proportional valves 77 and the thermostat 78. The pressure sensor 71 monitors the hydrogen pressure in the system to ensure that the hydrogen pressure is within a safe range. The temperature sensor 72 monitors the temperature in the system, including the temperature of the hydrogen and each component. The back pressure valve 73 controls the backflow of gas or liquid to maintain a certain downstream pressure. The shut-off valve 74 can quickly shut off the flow of gas in an emergency. The proportional valve precisely adjusts the flow of hydrogen. The thermostat 78 is used to adjust the temperature of the system or a specific component. The PCL controller collects pressure and temperature signals through the pressure sensor 71 and the temperature sensor 72, transmits the data signals to the operation module 40 through the PCL controller, and directly controls the opening of the back pressure valve 73, the shut-off valve 74, the hydrogen inlet master valve 76, and the proportional valve to meet the pressure requirements of the system start air and hydrogen. The control of the battery and each component is realized by using contact signals or communication.

[0043] In a specific embodiment, the data acquisition module 30 comprises: a fuel cell unit 31, a power battery 32, an air compressor 33, a water pump 34, a hydrogen pump 35, a PTC heater 36 and a DCL unit 37, and the fuel cell unit 31, the power battery 32, the air compressor 33, the water pump 34, the hydrogen pump 35, the PTC heater 36 and the DCL unit 37 are all communicatively connected to the system control module 20.

[0044] Specifically, the fuel cell unit 31 is the core component of hydrogen power generation, which converts the chemical reaction energy of hydrogen and oxygen into electrical energy. The power battery 32 stores and supplies electrical energy. The PTC heater 36 provides auxiliary heating for the system in a low temperature environment. The power battery 32 detects the battery capacity and controls the discharge of the fuel cell according to the capacity, which can be directly used for power supply. The excess power is stored in the power battery 32, and the main function of the power battery 32 is to start the system and ensure stable power supply. The DCL unit 37 processes data and manages communication. The key data of the fuel cell unit 31, the power battery 32 and other devices are sent to the system control module 20 (PLC) through the communication connection of the Ethernet line, and the data interaction and control are performed through the conversion module 60 and the switch 50. The PLC generates corresponding control instructions according to the received data. The control instructions are issued to the corresponding execution mechanism 70, such as adjusting the output of the air compressor 33 and controlling the operation of the water pump 34.

[0045] In a specific embodiment, the data acquisition module 30 further comprises a PCS unit 38 connected to the customer power grid for communication with external devices.

[0046] Specifically, the PCS unit 38 is an interface between the hydrogen power generation system and the power grid, and the PCS unit 38 is responsible for converting the generated electrical energy into electrical energy meeting the power grid standard and realizing bidirectional flow.

[0047] In a specific embodiment, the system control module 20 has a 232 communication module, a 485 communication module and a digital input and output module, and the 232 communication module and the 485 communication module are both in communication with the outside world.

[0048] In a specific embodiment, the control system further comprises a gas supply path, a water supply path and a hydrogen supply path, and the gas supply path, the water supply path and the hydrogen supply path are respectively connected to the fuel cell unit 31; wherein the gas supply path has the pressure sensor 71, the temperature sensor 72 and the air compressor 33; the water supply path has the water pump 34, the PTC heater 36 and the temperature sensor 72; and the hydrogen supply path has the shut-off valve 74, the proportional valve, the hydrogen pump 35, the temperature sensor 72 and the pressure sensor 71.

[0049] Specifically, the air compressor 33 compresses and sends air to the fuel cell unit 31, while the pressure sensor 71 and the temperature sensor 72 monitor the pressure and temperature of the air to ensure that they are within the appropriate range. The water pump 34 in the water supply passage pushes the coolant to circulate, and the PTC heater 36 provides auxiliary heating when necessary to raise the system temperature to meet the system startup requirements, prevent the environment from being too cold to start, and make the overall system suitable for use in harsh environments. The temperature sensor 72 monitors the water temperature to keep the system temperature balanced. The hydrogen pump 35 in the hydrogen supply passage delivers hydrogen to the fuel cell unit 31, and the shut-off valve 74 and the proportional valve regulate the flow of hydrogen. The pressure sensor 71 and the temperature sensor 72 monitor the pressure and temperature of the hydrogen. The system control module 20 receives data from the data acquisition module 30 in real time and sends it to the operation module 40 for display. The operation module 40 starts the working state of the relevant equipment according to the displayed data within the preset control logic, and directly controls the system control module 20 to adjust the output of the air compressor 33, control the operation of the water pump 34, etc.

[0050] In a specific embodiment, the conversion module 60 converts CAN signals to TCP / IP protocol signals.

[0051] Specifically, data is transmitted to the conversion module 60 through the CAN bus. The conversion module 60 receives the CAN signal and converts it to a TCP / IP protocol signal. The converted TCP / IP signal is sent to a remote monitoring system, a data analysis platform, or other network devices through a network.

[0052] In a specific embodiment, the control system further includes a master control module 80 connected to the system control module 20.

[0053] Specifically, the master control module 80 is an MCU control center in the embodiment, which is used to detect whether the CVM and the single voltage meet the requirements. The MCU control center analyzes the monitored data and determines whether it meets the preset safety and performance requirements. If the parameters meet the requirements, the MCU control center sends the data to the system control module 20 through the communication module for the next operation. The system control module 20 executes the startup workflow according to the data provided by the MCU control center, such as starting the fuel cell unit 31 and activating the passage. If the parameters do not meet the requirements, the MCU control center will instruct the system control module 20 to stop working and report fault information for maintenance or repair.

[0054] Therefore, the control system 100 for distributed hydrogen energy power generation based on PLC control provided above realizes distributed control of the system by setting the power supply module 10, the system control module 20, the data information module, the switch 50, the conversion module 60 and the actuator 70; sets the PLC controller as the control core, has better tolerance and stability, is suitable for working in harsh environments, the programming and operation of the PLC are more convenient, and the operation complexity is reduced; sets the operation module 40 and the data acquisition module 30 to realize real-time acquisition and processing of various sensor data, transmit the data to the operation module 40 to provide an instruction interface required by operation control, and the easy editing of the operation module 40 makes the system maintenance more convenient; sets the direct connection between the system control module 20 and the actuator 70 to make the system response more timely. By using the PLC as the control core, the stability and reliability of the hydrogen energy power generation system can be significantly improved, and the maintenance cost and operation complexity can be reduced.

[0055] The above only describes the embodiments of the present application, and it should be pointed out that those skilled in the art can make improvements without departing from the creative concept of the present application, and these all belong to the protection scope of the present application.

Claims

1. A control system based on PLC to control distributed hydrogen power generation, characterized in that: include: Power supply module, system control module, data acquisition module, operation module, switch, conversion module and actuator; The power supply module is connected to the system control module, the operation module, the switch, the conversion module, and the data acquisition module; the switch is in communication with the conversion module, the operation module, and the system control module; the data acquisition module is in communication with the system control module; and the system control module is connected to the actuator; Wherein, the data acquisition module transmits each data to the operation module so that the operation module can be used for operation control requirement instructions; The system control module is used to receive instructions from the operation module to control the operation of the actuator.

2. A control system for distributed hydrogen power generation based on PLC control according to claim 1, characterized in that: The communication connection is an Ethernet cable.

3. The control system for distributed hydrogen power generation based on PLC control according to claim 1 is characterized in that: The operating module is a touch screen, so that the touch screen serves as a control and display terminal.

4. A control system for distributed hydrogen power generation based on PLC control according to claim 3, characterized in that: The actuator includes a pressure sensor, a temperature sensor, a back pressure valve, a shut-off valve, a steam trap, a hydrogen inlet main valve, a proportional valve and a thermostat. The pressure sensor, the temperature sensor, the back pressure valve, the shut-off valve, the steam trap, the hydrogen inlet main valve, the proportional valve and the thermostat all act on the system control module respectively.

5. The control system for distributed hydrogen power generation based on PLC control according to claim 4 is characterized in that: The data acquisition module includes: a fuel cell stack unit, a power battery, an air compressor, a water pump, a hydrogen pump, a PTC heater and a DCL unit. The fuel cell stack unit, the power battery, the air compressor, the water pump, the hydrogen pump, the PTC heater and the DCL unit are all communicatively connected to the system control module.

6. The control system for distributed hydrogen power generation based on PLC control according to claim 5 is characterized in that: The data acquisition module further includes a PCS unit connected to a customer power grid for communicating with external devices.

7. The control system for distributed hydrogen power generation based on PLC control according to claim 5 is characterized in that: The system control module further includes an air supply passage, a water supply passage, and a hydrogen supply passage, wherein the air supply passage, the water supply passage, and the hydrogen supply passage are respectively connected to the fuel cell stack unit; The air supply passage has the pressure sensor, the temperature sensor and the air compressor to control the air; The water supply passage comprises the water pump, the PTC heater and the temperature sensor; The hydrogen supply passage includes the shutoff valve, the proportional valve, the hydrogen pump, the temperature sensor, and the pressure sensor.

8. The control system for distributed hydrogen power generation based on PLC control according to claim 1 is characterized in that: The conversion module converts CAN signals into TCP\IP protocol signals.

9. The control system for distributed hydrogen power generation based on PLC control according to claim 1 is characterized in that: The system control module further includes a main control module, and the main control module is connected to the system control module.

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