Hydrogen production control system based on energy management

Abstract

The invention discloses a hydrogen production control system based on energy management, and belongs to the technical field of hydrogen production control, the hydrogen production control system comprises a safety control cabinet A, the output end of the safety control cabinet A is connected with the input end of a safety control cabinet B, and the output end of the safety control cabinet B is connected with the input end of a safety control cabinet C; according to the invention, the energy management module is arranged, the energy management system is responsible for scheduling of energy supply and use of the whole machine, the safety control system is responsible for operation safety control of the equipment, and the fuel cell system and the hydrogen production system respectively complete power generation and hydrogen production function control of the equipment, so that the application effect of the whole control system is improved; four hydrogen detectors are arranged in the system and used for detecting the hydrogen concentration in the equipment and the room space respectively, when it is detected that the hydrogen content is larger than 1%, a hydrogen leakage first-level alarm is triggered, when the hydrogen content is larger than 2%, a hydrogen leakage second-level alarm is triggered, and if the second-level alarm is generated, the sudden stop process is started; and the safety of the system is greatly improved.

Description

Technical Field

[0001] The present invention belongs to the technical field of hydrogen production control, and in particular relates to a hydrogen production control system based on energy management. Background Art

[0002] Hydrogen is a chemical element with the symbol H, which ranks first in the periodic table. Hydrogen is one of the most abundant elements in the universe and the simplest diatomic gas molecule. It is composed of two hydrogen atoms bonded by a covalent bond and has the chemical formula H2. Due to its high calorific value, clean and pollution-free, and renewable advantages, hydrogen is considered to be an important component of the future energy system. At present, hydrogen has been widely used in the fields of industry, transportation, energy, etc., such as fuel cell vehicles, hydrogen energy storage, chemical raw materials, etc. At the same time, with the continuous advancement of technology and the reduction of costs, the application prospects of hydrogen will be broader. When preparing and producing hydrogen, a hydrogen production control system needs to be applied.

[0003] A Chinese patent discloses (CN115912954A) a hydrogen production control system for controlling a hydrogen production device to produce hydrogen. The hydrogen production control system includes: a main controller, a current conversion unit, a DC / DC voltage conversion unit and a hydrogen production power supply controller; the main controller is used to obtain an AC signal from an AC power grid, and provide a current conversion control signal to the current conversion unit according to the AC signal of the AC power grid; the current conversion unit is used to convert the AC signal of the AC power grid into a DC signal according to the current conversion control signal; the hydrogen production power supply controller is used to control the DC / DC voltage conversion unit to convert the DC signal into a power supply with a constant voltage to control the start-up of the hydrogen production device; the hydrogen production power supply controller is also used to obtain the temperature of the hydrogen production device in real time after the hydrogen production device is started, and when the temperature of the hydrogen production device is greater than or equal to a preset temperature, control the DC / DC voltage conversion unit to convert the DC signal into a power supply with a constant current to control the hydrogen production device to produce hydrogen. Although today's hydrogen production control system can also complete the control of the hydrogen production process, it does not have a stable energy management module, resulting in high energy consumption for hydrogen production, greatly increasing the cost of hydrogen production, and poor actual application effect. In order to solve the above problems, a hydrogen production control system based on energy management is urgently needed. Summary of the invention

[0004] The purpose of the present invention is to propose a hydrogen production control system based on energy management in order to solve the problem that although the current hydrogen production control system can complete the control of the hydrogen production process, it is not equipped with a stable energy management module, resulting in high energy consumption for hydrogen production, greatly increasing the cost of hydrogen production, and poor actual application effect.

[0005] In order to achieve the above-mentioned purpose, the present invention adopts the following technical scheme: a hydrogen production control system based on energy management, comprising a safety control cabinet A, the output end of the safety control cabinet A is connected to the input end of the safety control cabinet B, the output end of the safety control cabinet B is connected to the input end of the safety control cabinet C, the safety control cabinet A comprises an energy management module, the output end of the energy management module is connected to the input end of the safety control module, the output end of the safety control module is connected to the input end of the fuel cell monitoring module, and the output end of the fuel cell monitoring module is connected to the input end of the hydrogen production system monitoring module.

[0006] As a further description of the above technical solution:

[0007] The safety control cabinet A includes an integrated inverter and a battery management module, the output end of the integrated inverter is connected to the input end of the battery management module, and the safety control cabinet C is provided with a hydrogen storage system.

[0008] This article also discloses a hydrogen production control method based on energy management, the specific steps of which are:

[0009] S1, start control logic;

[0010] S2, start the shutdown logic;

[0011] S3, start emergency stop logic;

[0012] S4. Carry out energy management;

[0013] S5. Set up safety equipment.

[0014] As a further description of the above technical solution:

[0015] In S1, the start control logic is specifically as follows: after the device is connected to cabinets A and C, press the start button on the device panel to start the device, connect the inverter communication system, read the real-time status of the inverter, photovoltaic, and battery and the battery SOC, connect to the hydrogen supply system of cabinet C, read the gas source pressure and the status of the hydrogen supply system, and the device enters the operating state.

[0016] As a further description of the above technical solution:

[0017] In S2, the shutdown logic is started, specifically: the user presses the stop button on the device panel to perform a normal shutdown action, when the fuel cell is stopped (normal shutdown process), the fuel cell power connection is disconnected, the hydrogen production system is stopped, the hydrogen production system power connection is disconnected, and the power connection with the safety control cabinet A is disconnected, and the device enters a shutdown state.

[0018] As a further description of the above technical solution:

[0019] In S3, the emergency stop logic is started, specifically: the forced exhaust fan is started, the fuel cell is stopped (emergency shutdown process), and the fuel cell power supply is disconnected, the hydrogen production system is stopped, and the hydrogen production system power supply is disconnected, and the power supply connection with the safety control cabinet A is disconnected, and the equipment enters the shutdown state.

[0020] As a further description of the above technical solution:

[0021] In S4, energy management is performed, including managing user-side power supply, managing battery charging, managing the start and stop of hydrogen production, and managing the start and stop of fuel cells.

[0022] As a further description of the above technical solution:

[0023] The management of user-side power supply specifically includes: according to the user-side load power, photovoltaic power is preferentially used to supply power to the user, and when photovoltaic power is insufficient, battery stored power is used to supply power to the user.

[0024] As a further description of the above technical solution:

[0025] The management of battery charging is specifically as follows: when the power of the user load is less than the photovoltaic power, the lithium battery charging is started; when the battery power is less than 55% and the photovoltaic power is less than 2kW, the fuel cell is started to generate electricity to charge the lithium battery.

[0026] As a further description of the above technical solution:

[0027] The management of hydrogen production start and stop is specifically as follows: when the lithium battery SOC is greater than 85% and the photovoltaic input is greater than 2kW, the hydrogen production system is started; when the lithium battery SOC is lower than 75%, hydrogen production is stopped. During the operation of the fuel cell, the hydrogen production system is not allowed to be started. The management of fuel cell start and stop is specifically as follows: when the battery power is lower than 55% and the photovoltaic power is less than 2kW, the fuel cell is started to generate electricity to charge the lithium battery. During the operation of the fuel cell, the fuel cell output power is adjusted according to the user load power and the photovoltaic power. When the lithium battery SOC is higher than 95%, or the photovoltaic power exceeds 3kW, the fuel cell is stopped to generate electricity. During the operation of the hydrogen production system, the fuel cell is not allowed to be started to generate electricity.

[0028] In summary, due to the adoption of the above technical solution, the beneficial effects of the present invention are:

[0029] In the present invention, an energy management module is provided, the energy management system is responsible for the scheduling of the energy supply and use of the whole machine, the safety control system is responsible for the operation safety control of the equipment, the fuel cell system and the hydrogen production system respectively complete the power generation and hydrogen production function control of the equipment, and the application effect of the overall control system is improved. In addition, four hydrogen detectors are provided in the system for detecting the hydrogen concentration inside the equipment and in the room space respectively. When the hydrogen content is detected to be greater than 1%, the first-level alarm of hydrogen leakage is triggered, and when the hydrogen content is greater than 2%, the second-level alarm of hydrogen leakage is triggered. When the second-level alarm occurs, the emergency stop process is initiated, which greatly improves the safety of the system. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is a schematic diagram of the module structure of a hydrogen production control system based on energy management.

[0031] Figure 2 The figure is a schematic diagram of the submodule structure of the safety control cabinet A in a hydrogen production control system based on energy management.

[0032] Figure 3 The figure is a schematic diagram of the submodule structure of the safety control cabinet B in a hydrogen production control system based on energy management.

[0033] Figure 4 This is a schematic diagram of the safety control cabinet B in a hydrogen production control system based on energy management.

[0034] Figure 5 The figure is a flow chart of a hydrogen production control method based on energy management.

[0035] Legend:

[0036] 1. Safety control cabinet A; 2. Safety control cabinet B; 3. Safety control cabinet C. DETAILED DESCRIPTION

[0037] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] See also Figure 1-Figure 5The present invention provides a technical solution: a hydrogen production control system based on energy management, comprising a safety control cabinet A 1, wherein the output end of the safety control cabinet A 1 is connected to the input end of the safety control cabinet B 2, and the output end of the safety control cabinet B 2 is connected to the input end of the safety control cabinet C 3, the safety control cabinet A 2 comprises an energy management module, the output end of the energy management module is connected to the input end of the safety control module, the output end of the safety control module is connected to the input end of the fuel cell monitoring module, the output end of the fuel cell monitoring module is connected to the input end of the hydrogen production system monitoring module, the safety control cabinet A 1 comprises an integrated inverter and a battery management module, the output end of the integrated inverter is connected to the input end of the battery management module, and a hydrogen storage system is arranged in the safety control cabinet C 3;

[0039] This article also discloses a hydrogen production control method based on energy management, the specific steps of which are:

[0040] S1, start control logic, specifically: after the equipment is connected to cabinets A and C, press the start button on the equipment panel to start the equipment startup process, connect to the inverter communication system, read the real-time status of the inverter, photovoltaic, and battery and the battery SOC, connect to the hydrogen supply system of cabinet C, read the gas source pressure and the status of the hydrogen supply system, and the equipment enters the running state;

[0041] S2, start the shutdown logic, specifically: the user presses the stop button on the equipment panel to perform the normal shutdown action, when the fuel cell stops running (normal shutdown process), the fuel cell power connection is disconnected, the hydrogen production system stops running, the hydrogen production system power connection is disconnected, and the power connection with the safety control cabinet A 1 is disconnected, and the equipment enters the shutdown state;

[0042] S3, start the emergency stop logic, specifically: start the forced exhaust fan, stop the fuel cell operation (emergency shutdown process), disconnect the fuel cell power connection, stop the hydrogen production system operation, disconnect the hydrogen production system power connection, disconnect the power connection with the safety control cabinet A 1, and the equipment enters the shutdown state;

[0043] S4, perform energy management, including management of user-side power supply, management of battery charging, management of hydrogen production start and stop, and management of fuel cell start and stop. Management of user-side power supply, specifically: according to the user-side load power, give priority to using photovoltaic power to power the user. When photovoltaic power is insufficient, use battery storage power to power the user. Management of battery charging, specifically: when the power of the user load is less than the photovoltaic power, start the lithium battery charging. When the battery power is less than 55% and the photovoltaic power is less than 2kW, start the fuel cell to generate electricity to charge the lithium battery. Management of hydrogen production start and stop, specifically: when the lithium battery SOC is greater than 85% and the photovoltaic input is greater than 2kW, start the hydrogen production system. When the lithium battery SOC is less than 75%, stop hydrogen production. The hydrogen production system is not allowed to be started during the operation of the fuel cell. The management of fuel cell start and stop, specifically: when the battery power is less than 55% and the photovoltaic power is less than 2kW, start the fuel cell to generate electricity to charge the lithium battery. During the operation of the fuel cell, the fuel cell output power is adjusted according to the user load power and photovoltaic power. When the lithium battery SOC is higher than 95%, or the photovoltaic power exceeds 3kW, stop the fuel cell to generate electricity. During the operation of the hydrogen production system, the fuel cell power generation is not allowed to be started.

[0044] S5. Set up safety equipment.

[0045] In this embodiment, an energy management module is provided, the energy management system is responsible for the scheduling of the energy supply and use of the whole machine, the safety control system is responsible for the operation safety control of the equipment, the fuel cell system and the hydrogen production system respectively complete the power generation and hydrogen production function control of the equipment, and improve the application effect of the overall control system. In addition, four hydrogen detectors are provided in the system to detect the hydrogen concentration inside the equipment and in the room space respectively. When the hydrogen content is greater than 1%, the first-level hydrogen leakage alarm is triggered, and when the hydrogen content is greater than 2%, the second-level hydrogen leakage alarm is triggered. When the second-level alarm occurs, the emergency stop process is initiated, which greatly improves the safety of the system.

[0046] It should be noted in the embodiment that: in S5, the safety equipment provided includes an explosion-proof fan, an emergency stop button, a pressure sensor and a safety valve, wherein a large-volume explosion-proof fan is installed on the top of the device, and the fan is connected to the exhaust port outside the room through a pipe. When the device detects a hydrogen leak, the fan is started to exhaust air. A mechanical emergency stop button is provided on the device panel, which is located on the right side of the middle of the device panel. The emergency stop button is connected to the safety PLC. When the user presses the emergency stop button, the PLC executes the emergency stop control logic. The pressure sensor PT301 is provided to detect the fuel cell inlet pressure, and the device pressure sensor PT204 is used to detect the outlet pressure of the hydrogen production system. The pipeline pressure is monitored by PT301 and PT204. When the PT204 pressure exceeds the safety pressure of 35 bar, the hydrogen production system is stopped. When the PT301 pressure exceeds the safety pressure of 10 bar, the fuel cell system is stopped.

[0047] The above description is only a preferred specific implementation manner of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical scheme and inventive concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A hydrogen production control system based on energy management, comprising a safety control cabinet A (1), characterized in that: The output end of the safety control cabinet A (1) is connected to the input end of the safety control cabinet B (2), the output end of the safety control cabinet B (2) is connected to the input end of the safety control cabinet C (3), the safety control cabinet A (2) comprises an energy management module, the output end of the energy management module is connected to the input end of the safety control module, the output end of the safety control module is connected to the input end of the fuel cell monitoring module, and the output end of the fuel cell monitoring module is connected to the input end of the hydrogen production system monitoring module.

2. A hydrogen production control system based on energy management according to claim 1, characterized in that: The safety control cabinet A (1) comprises an integrated inverter and a battery management module, the output end of the integrated inverter is connected to the input end of the battery management module, and the safety control cabinet C (3) is provided with a hydrogen storage system.

3. A hydrogen production control method based on energy management, characterized in that: The specific steps are: S1, start control logic; S2, start the shutdown logic; S3, start the emergency stop logic; S4. Carry out energy management; S5. Set up safety equipment.

4. A hydrogen production control method based on energy management according to claim 3, characterized in that: In S1, the start control logic is specifically as follows: after the device is connected to cabinets A and C, press the start button on the device panel to start the device, connect the inverter communication system, read the real-time status of the inverter, photovoltaic, and battery and the battery SOC, connect to the hydrogen supply system of cabinet C, read the gas source pressure and the status of the hydrogen supply system, and the device enters the operating state.

5. A hydrogen production control method based on energy management according to claim 4, characterized in that: In S2, the shutdown logic is started, specifically: the user presses the stop button on the device panel to execute the normal shutdown action, when the fuel cell stops running (normal shutdown process), the fuel cell power connection is disconnected, the hydrogen production system stops running, the hydrogen production system power connection is disconnected, and the power connection with the safety control cabinet A (1) is disconnected, and the device enters the shutdown state.

6. A hydrogen production control method based on energy management according to claim 5, characterized in that: In S3, the emergency stop logic is started, specifically: the forced exhaust fan is started, the fuel cell is stopped (emergency shutdown process), and the fuel cell power supply is disconnected, the hydrogen production system is stopped, and the hydrogen production system power supply is disconnected, and the power supply connection with the safety control cabinet A (1) is disconnected, and the equipment enters the shutdown state.

7. A hydrogen production control method based on energy management according to claim 6, characterized in that: In S4, energy management is performed, including managing user-side power supply, managing battery charging, managing the start and stop of hydrogen production, and managing the start and stop of fuel cells.

8. The hydrogen production control method based on energy management according to claim 7, characterized in that: The management of user-side power supply specifically includes: according to the user-side load power, photovoltaic power is preferentially used to supply power to the user, and when photovoltaic power is insufficient, battery stored power is used to supply power to the user.

9. The hydrogen production control method based on energy management according to claim 7, characterized in that: The management of battery charging is specifically as follows: when the power of the user load is less than the photovoltaic power, the lithium battery charging is started; when the battery power is less than 55% and the photovoltaic power is less than 2kW, the fuel cell is started to generate electricity to charge the lithium battery.

10. The hydrogen production control method based on energy management according to claim 7, characterized in that: The management of hydrogen production start and stop is specifically as follows: when the lithium battery SOC is greater than 85% and the photovoltaic input is greater than 2kW, the hydrogen production system is started; when the lithium battery SOC is lower than 75%, hydrogen production is stopped. During the operation of the fuel cell, the hydrogen production system is not allowed to be started. The management of fuel cell start and stop is specifically as follows: when the battery power is lower than 55% and the photovoltaic power is less than 2kW, the fuel cell is started to generate electricity to charge the lithium battery. During the operation of the fuel cell, the fuel cell output power is adjusted according to the user load power and the photovoltaic power. When the lithium battery SOC is higher than 95%, or the photovoltaic power exceeds 3kW, the fuel cell is stopped to generate electricity. During the operation of the hydrogen production system, the fuel cell is not allowed to be started to generate electricity.

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