CN113604840A - Pressure control method of hydrogen production system and hydrogen production system - Google Patents
Pressure control method of hydrogen production system and hydrogen production system Download PDFInfo
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- 239000001257 hydrogen Substances 0.000 title claims abstract description 216
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 216
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 204
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 181
- 238000000034 method Methods 0.000 title claims abstract description 47
- 230000001105 regulatory effect Effects 0.000 claims abstract description 83
- QVGXLLKOCUKJST-UHFFFAOYSA-N atomic oxygen Chemical compound [O] QVGXLLKOCUKJST-UHFFFAOYSA-N 0.000 claims description 24
- 239000001301 oxygen Substances 0.000 claims description 24
- 229910052760 oxygen Inorganic materials 0.000 claims description 24
- 239000003792 electrolyte Substances 0.000 claims description 20
- 238000005868 electrolysis reaction Methods 0.000 claims description 13
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 13
- 150000002431 hydrogen Chemical class 0.000 claims description 12
- 238000004891 communication Methods 0.000 claims description 11
- 238000010248 power generation Methods 0.000 claims description 9
- 238000013507 mapping Methods 0.000 claims description 7
- 238000004458 analytical method Methods 0.000 claims description 3
- 230000000694 effects Effects 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 4
- 239000007789 gas Substances 0.000 description 4
- 238000000926 separation method Methods 0.000 description 3
- 238000001514 detection method Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- 238000004364 calculation method Methods 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000002360 preparation method Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000750 progressive effect Effects 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000003860 storage Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B15/00—Operating or servicing cells
- C25B15/02—Process control or regulation
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/50—Processes
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B15/00—Operating or servicing cells
- C25B15/02—Process control or regulation
- C25B15/023—Measuring, analysing or testing during electrolytic production
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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- Organic Chemistry (AREA)
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Abstract
The pressure control method comprises the steps of obtaining parameter value variable quantity of a target electrical parameter and a pressure difference value between current system pressure and a preset pressure threshold, determining a first regulating quantity according to the parameter value variable quantity, determining a target regulating quantity based on the first regulating quantity and the pressure difference value, and finally regulating the system pressure of the hydrogen production system according to the target regulating quantity. The target electrical parameters are related to the hydrogen production power of the hydrogen production system, and the fluctuation of the hydrogen production power can directly influence the system pressure of the hydrogen production system, and the pressure change occurs after the fluctuation of the hydrogen production power, so that the adjustment amount can be determined in advance before the hydrogen production power finally influences the pressure change of the system, the pressure control efficiency is effectively improved, and the control effect is improved.
Description
Technical Field
The invention relates to the technical field of hydrogen preparation, in particular to a pressure control method of a hydrogen production system and the hydrogen production system.
Background
Referring to fig. 1, fig. 1 shows a structural block diagram of a water electrolysis hydrogen production system, in the hydrogen production system, a hydrogen production power supply is connected with a hydrogen production device, hydrogen production power is output to the hydrogen production device to supply the hydrogen production device to perform hydrogen production operation, the hydrogen production device outputs electrolyte containing hydrogen to a hydrogen separator, hydrogen is obtained after separation treatment of the hydrogen separator, meanwhile, the hydrogen production device outputs electrolyte containing oxygen to an oxygen separator, oxygen is obtained after separation treatment of the oxygen separator, and the electrolyte after gas separation treatment can be converged into the hydrogen production device to be reused under the action of an electrolyte circulating pump.
In the actual operation of the water electrolysis hydrogen production system, the system pressure of the hydrogen production system is in a safe range, so that the safe operation of the hydrogen production system is ensured. As shown in fig. 1, a pressure transmitter is disposed in an existing hydrogen production system and used for detecting a system pressure of the hydrogen production system, a controller calculates an adjustment amount of a valve according to a detection result fed back by the pressure transmitter, and finally adjusts an opening degree of the valve according to the calculated adjustment amount, so as to keep the system pressure of the system within a safe range.
The inventor researches and discovers that the pressure balance control method in the prior art belongs to passive control, and the whole process takes too long and the pressure control effect is poor from the detection of the system pressure of the system to the final determination of the regulating quantity and the opening of the valve until the system pressure is controlled in a safe range.
Disclosure of Invention
The invention provides a pressure control method of a hydrogen production system and the hydrogen production system, wherein a target regulating quantity finally used for regulating the system pressure is obtained based on a target electrical parameter related to hydrogen production power, and the regulating quantity can be determined in advance before the hydrogen production power finally influences the system pressure, so that the system pressure control efficiency of the hydrogen production system is effectively improved, and the pressure control effect is improved.
In order to achieve the purpose, the technical scheme provided by the invention is as follows:
in a first aspect, the present invention provides a pressure control method for a hydrogen production system, comprising:
acquiring parameter value variable quantity of a target electrical parameter and a pressure difference value between the current system pressure and a preset pressure threshold;
wherein the target electrical parameter is related to a hydrogen production power of the hydrogen production system;
determining a first regulating quantity according to the parameter value variable quantity;
determining a target adjustment amount based on the first adjustment amount and the pressure difference value;
and adjusting the system pressure of the hydrogen production system according to the target regulating quantity.
Optionally, the determining a target adjustment amount based on the first adjustment amount and the pressure difference value includes:
determining a second regulating quantity according to the pressure difference value;
a target adjustment amount is determined based on the first adjustment amount and the second adjustment amount.
Optionally, the determining a target adjustment amount based on the first adjustment amount and the pressure difference value includes:
and inputting the first regulating quantity and the pressure difference value into a first preset controller to obtain a target regulating quantity.
Optionally, the determining a second adjustment amount according to the pressure difference includes:
and inputting the pressure difference value into a second preset controller to obtain a second regulating quantity corresponding to the pressure difference value.
Optionally, the determining a first adjustment amount according to the parameter value variation includes:
and inputting the parameter value variable quantity into a third preset controller to obtain a first regulating quantity corresponding to the parameter value variable quantity.
Optionally, the inputting the parameter value variation into a third preset controller to obtain a first adjustment amount corresponding to the parameter value variation includes:
judging whether the parameter value variation is larger than a preset variation threshold value or not;
if the parameter value variable quantity is larger than the preset variable quantity threshold value, inputting the parameter value variable quantity into a third preset controller to obtain a first regulating quantity corresponding to the parameter value variable quantity;
and if the parameter value variable quantity is smaller than or equal to the preset variable quantity threshold value, acquiring a first regulating quantity of the previous control period.
Optionally, the obtaining a parameter value variation of the target electrical parameter includes:
acquiring a parameter value of a target electrical parameter in a current control period and a parameter value of a target electrical parameter in a previous control period;
and taking the difference value between the parameter value of the current control period and the parameter value of the previous control period as the parameter value variation of the target electrical parameter.
Optionally, the obtaining a parameter value of the target electrical parameter in the current control period includes:
acquiring a parameter signal of a target electrical parameter fed back by an electrical parameter acquisition device arranged in the hydrogen production system;
analyzing the parameter signal, and determining the parameter value of the target electrical parameter in the current control period according to the analysis result;
alternatively, the first and second electrodes may be,
acquiring a communication message of a hydrogen production power supply in the hydrogen production system;
and extracting the parameter value of the target electrical parameter carried by the communication message in the current control period.
Optionally, the target electrical parameter comprises one of an input power, an input voltage, and an input current of the hydrogen production system.
Optionally, the adjusting the system pressure of the hydrogen production system according to the target adjustment amount includes:
determining a target opening corresponding to the target adjustment quantity according to a preset mapping relation;
adjusting the opening of a pressure adjusting valve in the hydrogen production system to the target opening;
and recording a corresponding relation between the regulating quantity and the opening degree of the pressure regulating valve in the preset mapping relation.
Optionally, the method for controlling pressure of a hydrogen production system according to the first aspect of the present invention further includes:
and storing the parameter value of the target electrical parameter in the current control period.
In a second aspect, the present invention provides a hydrogen production system comprising: a hydrogen production power supply, a hydrogen production device, an electrolyte circulation pipeline, a hydrogen separator, an oxygen separator, a pressure regulating valve, a pressure acquisition device and a hydrogen production controller,
the output end of the hydrogen production power supply is connected with the input end of the hydrogen production device;
the output end of the hydrogen production device is connected with the electrolyte circulation pipeline;
the electrolyte circulation pipeline is respectively connected with the hydrogen separator and the oxygen separator;
the pressure regulating valve is connected with the hydrogen separator or the oxygen separator;
the pressure acquisition device acquires the system pressure of the hydrogen production system;
the hydrogen production controller is connected with the pressure acquisition device, the hydrogen production power supply and the pressure regulating valve respectively, and executes the pressure control method of the hydrogen production system according to any one of the first aspect of the invention.
Optionally, the hydrogen production controller is in communication connection with the hydrogen production power supply;
alternatively, the first and second electrodes may be,
the hydrogen production system also comprises an electrical parameter acquisition device;
the electrical parameter acquisition device is connected with the hydrogen production power supply;
the hydrogen production controller is connected with the electrical parameter acquisition device.
Optionally, the hydrogen production device comprises an alkaline water electrolysis hydrogen production device or a PEM water electrolysis hydrogen production device.
Optionally, the pressure acquisition device includes a pressure transmitter;
the pressure transmitter is connected with the oxygen separator.
Optionally, the hydrogen production power source comprises a wind power generation system, a photovoltaic power generation system or an alternating current power grid.
According to the pressure control method of the hydrogen production system, after parameter value variation of a target electrical parameter and a pressure difference value between the current system pressure and a preset pressure threshold value are obtained, a first regulating quantity is determined according to the parameter value variation, the target regulating quantity is determined based on the first regulating quantity and the pressure difference value, and finally the system pressure of the hydrogen production system is regulated according to the target regulating quantity. The target electrical parameters are related to the hydrogen production power of the hydrogen production system, and the fluctuation of the hydrogen production power can directly influence the system pressure of the hydrogen production system, and the pressure change occurs after the fluctuation of the hydrogen production power, so that the adjustment amount can be determined in advance before the hydrogen production power finally influences the pressure change of the system, the pressure control efficiency is effectively improved, and the control effect is improved.
Furthermore, the finally used target regulating quantity simultaneously considers the influence of power fluctuation and the actual pressure difference value of the hydrogen production system, and compared with the method for determining the regulating quantity by only depending on the system pressure of the system in the prior art, the regulating result is more accurate.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
FIG. 1 is a block diagram of a hydrogen production system by water electrolysis in the prior art;
FIG. 2 is a flow chart of a method for pressure control of a hydrogen production system according to an embodiment of the present invention;
fig. 3 is a block diagram of a system for producing hydrogen by water electrolysis according to an embodiment of the present invention.
Detailed Description
The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The inventor researches and discovers that in the actual working process of the water electrolysis hydrogen production system, the hydrogen production power of the hydrogen production device, namely the change of electric power directly used for hydrogen production after the running loss of the system is eliminated has direct influence on the system pressure of the hydrogen production system, when the hydrogen production power changes, the hydrogen production device can generate hydrogen and oxygen, and further the system pressure of the hydrogen production system is changed, so that the fluctuation of the hydrogen production power is always accompanied with the fluctuation of the system pressure, and the fluctuation of the system pressure is inevitably generated after the fluctuation of the hydrogen production power due to the working principle of the water electrolysis hydrogen production system, therefore, the prediction of the system pressure fluctuation can be realized based on the fluctuation of the hydrogen production power of the hydrogen production device, and the regulation and control of the system pressure are further carried out in advance.
Based on this, the embodiment of the present invention provides a pressure control method for a hydrogen production system, which is applied to a hydrogen production system by water electrolysis, and in particular, may be applied to a controller for adjusting system pressure in the hydrogen production system, and may also be applied to other controllers in the hydrogen production system, and of course, in some cases, may also be applied to a server on a network side for implementation. Referring to fig. 2, fig. 2 is a flow chart of a pressure control method of a hydrogen production system according to an embodiment of the present invention, where the flow chart of the pressure control method according to the embodiment may include:
s100, obtaining parameter value variable quantity of the target electrical parameter and a pressure difference value between the current system pressure and a preset pressure threshold value.
It should be emphasized that the target electrical parameter mentioned in this embodiment is related to the hydrogen production power of the hydrogen production system, and any one of the input power, the input voltage and the input current of the hydrogen production system may be selected in practical applications, and of course, other technical parameters related to the hydrogen production power may also be selected, without departing from the scope of the core idea of the present invention, and the present invention also falls within the protection scope of the present invention.
Further, the parameter value variation of the target electrical parameter refers to a difference between a parameter value of the target electrical parameter in a current control period and a parameter value of the target electrical parameter in a previous control period, based on which, when the parameter value variation of the target electrical parameter is obtained, the parameter value of the target electrical parameter in the previous control period and the parameter value of the target electrical parameter in the current control period can be respectively obtained, and then the obtained difference between the parameter value of the target electrical parameter in the current control period and the parameter value of the target electrical parameter in the previous control period is calculated, so that the parameter value variation of the target electrical parameter in the current control period is obtained.
Optionally, there are two implementation manners for obtaining the parameter value of the target electrical parameter in the current control period, and for a hydrogen production system provided with an electrical parameter acquisition device, a parameter signal of the target electrical parameter fed back by the electrical parameter acquisition device may be obtained, and after the obtained parameter signal is analyzed, the parameter value of the target electrical parameter in the current control period is determined according to the analysis result. For a hydrogen production system without an electrical parameter acquisition device, communication connection can be established with a hydrogen production power supply in advance, a communication message of the hydrogen production power supply in the hydrogen production system is obtained, and then parameter values of target electrical parameters carried by the obtained communication message in the current control period are extracted.
The parameter value for the target electrical parameter in the last control cycle may be obtained by accessing a preset data memory. Based on this, the pressure control method provided in the embodiment of the present invention should also be stored after the parameter value of the target electrical parameter in the current control period is obtained, so that the next control period can be obtained.
It should be noted that, if the pressure control method provided by the embodiment of the present invention is executed for the first time, the parameter value of the target electrical parameter in the last control period does not exist, and in order to avoid obtaining an incorrect parameter value variation, a preset initial parameter value may be adopted, and the initial parameter value may be obtained based on similar historical operating data of the hydrogen production system, so as to avoid obtaining a larger parameter value variation by calculation, and further avoid performing an incorrect adjustment process.
The current system pressure of the hydrogen production system can be acquired by a pressure acquisition device used in the prior art, such as a pressure transmitter, and the preset pressure threshold is acquired based on actual operation experience according to the pressure-resistant level and rated working condition parameters of the hydrogen production system, so that the normal operation of the hydrogen production system is met, and the preset pressure threshold can be set according to requirements in actual application. After the current system pressure and the preset pressure threshold of the hydrogen production system are obtained, subtracting the current system pressure from the preset pressure threshold, and obtaining a difference value, namely a corresponding pressure difference value.
It should be noted that, because the pressure variation caused by the hydrogen production power fluctuation may have a certain time delay, it is understood that the pressure difference obtained in this step, especially the current system pressure, may not be caused by the hydrogen production power fluctuation of the current control period, may be caused by the hydrogen production power fluctuation of the historical control period, and may be caused by other reasons in practical application. Of course, the pressure control of the current control cycle can be applied regardless of the cause of the change in the system pressure.
And S110, determining a first regulating quantity according to the parameter value variable quantity.
Optionally, an embodiment of the present invention provides a third preset controller, where a parameter value variation of a target electrical parameter is used as an input, an adjustment quantity representing an adjustment direction and an adjustment amplitude of the liquid level adjustment device is used as an output, and output data of the third preset controller can timely follow changes of the input data. In practical applications, the third preset controller may be a P-type controller, a PI controller, or a PID controller, or may be another controller in which output data changes with input data, and the third preset controller also falls within the protection scope of the present invention without departing from the scope of the core idea of the present invention.
In the prior art, system pressure adjustment of the hydrogen production system is accomplished through a pressure adjustment valve arranged in the system, generally, the pressure adjustment valve is arranged in an oxygen side loop where the oxygen separator is located, and certainly, the pressure adjustment valve may also be arranged in the oxygen side loop where the oxygen separator is located, or the hydrogen side loop and the oxygen side loop are arranged at the same time, based on which, the first adjustment amount in this embodiment is specifically used to represent the adjustment direction and the valve opening of the pressure adjustment valve.
In combination with the above definition of the third preset controller, it is conceivable that if the variation of the obtained parameter value is greater than zero, the first adjustment amount is to change the pressure regulating valve toward the positive direction in which the valve opening degree becomes larger, so as to reduce the system pressure of the system as soon as possible; if the parameter value variation is smaller than zero, the first adjustment quantity is to change the pressure regulating valve in a negative direction with smaller valve opening degree so as to increase the system pressure of the system by reducing gas emission; accordingly, if the parameter value variation is zero, the first adjustment amount should be zero, and the current position of the pressure regulating valve is maintained.
Optionally, a preset variation threshold is set in the embodiment of the present invention, after the parameter value variation of the target electrical parameter is obtained, the magnitude relationship between the parameter value variation and the preset variation threshold is compared, and if the absolute value of the parameter value variation is greater than the preset variation threshold, the parameter value variation is input to a third preset controller, so as to obtain a first adjustment amount corresponding to the parameter value variation; on the contrary, if the absolute value of the parameter value variation is less than or equal to the preset variation threshold, the first adjustment amount of the previous control period is obtained.
For example, the first adjustment amount may be determined directly according to the variation of the input power in the manner described above, i.e., the corresponding first adjustment amount is calculated regardless of the magnitude of the variation of the input power. It is also possible to set a preset variation threshold, for example, 10% of rated power, according to the above method, and calculate the first adjustment amount according to the input power variation when the absolute value of the input power variation is greater than 10% of rated power, and maintain the first adjustment amount of the previous control cycle if the absolute value of the input power variation is less than or equal to 10% of rated power.
Conceivably, through presetting the variable quantity threshold value, can avoid all adjusting pressure regulating valve at every control cycle, effectively reduce the regulation frequency of pressure regulating valve, help improving pressure regulating valve's life.
The setting of the preset variable threshold can be set according to the actual control precision requirement and the fault tolerance degree of the hydrogen production system to the hydrogen production power fluctuation, and the specific value of the preset variable threshold is not limited.
And S120, determining a target adjusting amount based on the first adjusting amount and the pressure difference value.
Embodiments of the present invention provide two methods for determining a target adjustment amount based on a first adjustment amount and a pressure difference value.
The first method comprises the following steps: the second adjustment amount is first determined from the pressure difference, and then the target adjustment amount is determined based on the first adjustment amount and the second adjustment amount.
When the second adjustment amount is determined according to the pressure difference, the embodiment of the invention provides the second preset controller, and the second adjustment amount corresponding to the pressure difference can be obtained by inputting the pressure difference into the second preset controller. Similar to the third preset controller, the second preset controller in this step may be implemented by using a P-type controller, a PI controller, or a PID controller, or may be implemented by using another controller in which output data changes along with input data.
The meaning represented by the second regulating quantity is the same as that represented by the first regulating quantity, and the second regulating quantity is also used for representing the regulating direction and the regulating amplitude of a pressure regulating device in the hydrogen production system, and when the pressure regulating device is realized by a pressure regulating valve, the second regulating quantity specifically represents the regulating direction and the valve opening of the pressure regulating valve.
Based on the above premise, if the pressure difference value is greater than zero, the second adjustment amount should change the pressure regulating valve toward the positive direction in which the valve opening degree becomes larger; if the parameter value variation is smaller than zero, the first regulating quantity is to make the pressure regulating valve change towards the negative direction that the valve opening degree becomes smaller; accordingly, if the parameter value variation is zero, the first adjustment amount should be zero, and the current position of the pressure regulating valve is maintained.
The manner of determining the target adjustment amount based on the first adjustment amount and the second adjustment amount includes various manners, and the sum of the first adjustment amount and the second adjustment amount may be directly used as the target adjustment amount, or the sum of the weights of the first adjustment amount and the second adjustment amount may be used as the target adjustment amount after the first adjustment amount and the second adjustment amount are weighted respectively. Of course, other methods for determining the target adjustment amount based on the first adjustment amount and the second adjustment amount may be adopted without departing from the scope of the core idea of the present invention.
And the second method comprises the following steps: the present embodiment provides a first preset controller, and the first preset controller has the same type selection rule as the second preset controller and the third preset controller, which is not described herein again. And inputting the first regulating quantity and the obtained pressure difference value into a first preset controller to obtain the target regulating quantity.
And S130, adjusting the system pressure of the hydrogen production system according to the target adjustment quantity.
After the target regulating quantity is determined, the system pressure of the hydrogen production system can be regulated according to the target regulating quantity.
Optionally, in the hydrogen production system, when the pressure adjustment is implemented by the pressure adjustment valve, the embodiment of the present invention provides a preset mapping relationship, where a corresponding relationship between the adjustment amount and the opening degree of the pressure adjustment valve is recorded in the preset mapping relationship.
After the target regulating quantity is obtained, the target opening corresponding to the target regulating quantity can be determined according to a preset mapping relation, and then a pressure regulating valve in the hydrogen production system can be regulated according to the target opening, so that the regulation and control of the system pressure are realized.
In summary, the pressure control method provided in the embodiments of the present invention obtains the parameter value variation of the target electrical parameter related to the hydrogen production power, and determines the first adjustment amount according to the parameter value variation, because the hydrogen production power fluctuation directly affects the pressure change of the hydrogen production system, and the pressure change occurs after the hydrogen production power fluctuation, the adjustment amount can be determined in advance before the hydrogen production power finally affects the pressure change, so that the pressure balance control efficiency is effectively improved, and the pressure balance control effect is improved.
Compared with the passive regulation method in the prior art, the method directly collects the original parameters influencing the pressure balance, belongs to the active regulation method, and collects the electrical parameters more quickly than the mechanical signals such as the pressure difference value, so the control method provided by the embodiment of the invention has higher execution efficiency, is particularly suitable for the hydrogen production system adopting the new energy hydrogen production power supply with obvious output power fluctuation, such as a photovoltaic power generation system, a wind power generation system and the like, is also suitable for the hydrogen production system adopting an alternating current power grid as the hydrogen production power supply, and has wider application range.
Furthermore, the finally used target regulating quantity simultaneously considers the influence of power fluctuation and the actual pressure difference of the hydrogen production system, and compared with the method for determining the regulating quantity by only depending on the pressure difference in the prior art, the regulating result is more accurate.
Optionally, referring to fig. 3, fig. 3 is a block diagram of a hydrogen production system according to an embodiment of the present invention, where the hydrogen production system includes: a hydrogen production power supply, a hydrogen production device, an electrolyte circulation pipeline, a hydrogen separator, an oxygen separator, a pressure regulating valve, a pressure acquisition device and a hydrogen production controller,
the output end of the hydrogen production power supply is connected with the input end of the hydrogen production device;
the hydrogen production device is connected with the electrolyte circulation pipeline, optionally, the electrolyte circulation pipeline at least comprises a cooler and a communication pipeline shown in fig. 3, generally, an electrolyte circulation pump connected with the electrolyte circulation pipeline is further arranged in the hydrogen production system and used for driving the electrolyte to circulate, and in practical application, the electrolyte circulation pipeline can also comprise other components, which can be realized by referring to the prior art, and the details are not described herein.
The electrolyte circulation pipeline is respectively connected with the hydrogen separator and the oxygen separator. The hydrogen separator is used for separating hydrogen from the electrolyte, the oxygen separator is used for separating oxygen from the electrolyte, and further, fig. 3 also shows a corresponding gas cooling module for further processing corresponding gas, which can be specifically realized based on the prior art and is not developed here.
In the example shown in fig. 3, the pressure regulating valve is connected to the oxygen separator, and in some cases, the pressure regulating valve may also be connected to the hydrogen separator. The pressure acquisition device can be selected from equipment capable of acquiring the system pressure of the hydrogen production system, such as a pressure transmitter, and the like, and can be connected with any component capable of reflecting the system pressure of the system in the hydrogen production system in a specific connection relationship, and in the embodiment shown in fig. 3, the pressure acquisition device is connected with the oxygen separator.
Meanwhile, the hydrogen production controller is respectively connected with the pressure acquisition device, the hydrogen production power supply and the pressure regulating valve, and executes the pressure control method of the hydrogen production system.
Optionally, the hydrogen production controller is in communication connection with the hydrogen production power supply, and obtains the parameter value of the target electrical parameter in a communication message manner.
Or the hydrogen production system also comprises an electrical parameter acquisition device, the electrical parameter acquisition device is connected with the hydrogen production power supply, the hydrogen production controller is connected with the electrical parameter acquisition device, and the hydrogen production controller can acquire the parameter value of the target electrical parameter through the electrical parameter acquisition device.
Optionally, the hydrogen production device in the above embodiments includes an alkaline water electrolysis hydrogen production device or a PEM water electrolysis hydrogen production device, and in addition, a solid oxide hydrogen production device may also be selected.
Optionally, the hydrogen production power supply in any of the above embodiments includes a wind power generation system or a photovoltaic power generation system, and may also be an ac power grid.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other. The device disclosed by the embodiment corresponds to the method disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the method part for description.
Those of skill would further appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware, computer software, or combinations of both, and that the various illustrative components and steps have been described above generally in terms of their functionality in order to clearly illustrate this interchangeability of hardware and software. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present invention.
The steps of a method or algorithm described in connection with the embodiments disclosed herein may be embodied directly in hardware, in a software module executed by a processor, or in a combination of the two. A software module may reside in Random Access Memory (RAM), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, a removable disk, a CD-ROM, or any other form of storage medium known in the art.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (16)
1. A pressure control method for a hydrogen production system, comprising:
acquiring parameter value variable quantity of a target electrical parameter and a pressure difference value between the current system pressure and a preset pressure threshold;
wherein the target electrical parameter is related to a hydrogen production power of the hydrogen production system;
determining a first regulating quantity according to the parameter value variable quantity;
determining a target adjustment amount based on the first adjustment amount and the pressure difference value;
and adjusting the system pressure of the hydrogen production system according to the target regulating quantity.
2. The pressure control method of a hydrogen generation system in accordance with claim 1, wherein the determining a target adjustment based on the first adjustment and the pressure difference comprises:
determining a second regulating quantity according to the pressure difference value;
a target adjustment amount is determined based on the first adjustment amount and the second adjustment amount.
3. The pressure control method of a hydrogen generation system in accordance with claim 1, wherein the determining a target adjustment based on the first adjustment and the pressure difference comprises:
and inputting the first regulating quantity and the pressure difference value into a first preset controller to obtain a target regulating quantity.
4. The method of pressure control for a hydrogen generation system of claim 2, wherein the determining a second adjustment based on the pressure differential comprises:
and inputting the pressure difference value into a second preset controller to obtain a second regulating quantity corresponding to the pressure difference value.
5. The pressure control method of a hydrogen generation system according to claim 1, wherein the determining a first adjustment amount according to the parameter value variation amount comprises:
and inputting the parameter value variable quantity into a third preset controller to obtain a first regulating quantity corresponding to the parameter value variable quantity.
6. The pressure control method for hydrogen production system according to claim 5, wherein the inputting the parameter value variation into a third preset controller to obtain a first adjustment amount corresponding to the parameter value variation comprises:
judging whether the parameter value variation is larger than a preset variation threshold value or not;
if the parameter value variable quantity is larger than the preset variable quantity threshold value, inputting the parameter value variable quantity into a third preset controller to obtain a first regulating quantity corresponding to the parameter value variable quantity;
and if the parameter value variable quantity is smaller than or equal to the preset variable quantity threshold value, acquiring a first regulating quantity of the previous control period.
7. The pressure control method for hydrogen production system according to claim 1, wherein the obtaining the parameter value variation of the target electrical parameter comprises:
acquiring a parameter value of a target electrical parameter in a current control period and a parameter value of a target electrical parameter in a previous control period;
and taking the difference value between the parameter value of the current control period and the parameter value of the previous control period as the parameter value variation of the target electrical parameter.
8. The pressure control method of hydrogen production system according to claim 7, wherein the obtaining of the parameter value of the target electrical parameter in the current control cycle comprises:
acquiring a parameter signal of a target electrical parameter fed back by an electrical parameter acquisition device arranged in the hydrogen production system;
analyzing the parameter signal, and determining the parameter value of the target electrical parameter in the current control period according to the analysis result;
alternatively, the first and second electrodes may be,
acquiring a communication message of a hydrogen production power supply in the hydrogen production system;
and extracting the parameter value of the target electrical parameter carried by the communication message in the current control period.
9. The method for pressure control of a hydrogen generation system according to any of claims 1-8, wherein the target electrical parameter comprises one of input power, input voltage, and input current of the hydrogen generation system.
10. The pressure control method for a hydrogen generation system according to any one of claims 1 to 8, wherein the adjusting the system pressure of the hydrogen generation system in accordance with the target adjustment amount includes:
determining a target opening corresponding to the target adjustment quantity according to a preset mapping relation;
adjusting the opening of a pressure adjusting valve in the hydrogen production system to the target opening;
and recording a corresponding relation between the regulating quantity and the opening degree of the pressure regulating valve in the preset mapping relation.
11. The pressure control method for a hydrogen generation system according to any one of claims 1 to 8, further comprising:
and storing the parameter value of the target electrical parameter in the current control period.
12. A hydrogen production system, comprising: a hydrogen production power supply, a hydrogen production device, an electrolyte circulation pipeline, a hydrogen separator, an oxygen separator, a pressure regulating valve, a pressure acquisition device and a hydrogen production controller,
the output end of the hydrogen production power supply is connected with the input end of the hydrogen production device;
the output end of the hydrogen production device is connected with the electrolyte circulation pipeline;
the electrolyte circulation pipeline is respectively connected with the hydrogen separator and the oxygen separator;
the pressure regulating valve is connected with the hydrogen separator or the oxygen separator;
the pressure acquisition device acquires the system pressure of the hydrogen production system;
the hydrogen production controller is respectively connected with the pressure acquisition device, the hydrogen production power supply and the pressure regulating valve, and executes the pressure control method of the hydrogen production system according to any one of claims 1 to 11.
13. The hydrogen generation system of claim 12, wherein the hydrogen generation controller is communicatively coupled to the hydrogen generation power supply;
alternatively, the first and second electrodes may be,
the hydrogen production system also comprises an electrical parameter acquisition device;
the electrical parameter acquisition device is connected with the hydrogen production power supply;
the hydrogen production controller is connected with the electrical parameter acquisition device.
14. The power generation system of claim 12, wherein the hydrogen-producing device comprises an alkaline water electrolysis hydrogen-producing device or a PEM water electrolysis hydrogen-producing device.
15. The hydrogen generation system of claim 12, wherein the pressure acquisition device comprises a pressure transmitter;
the pressure transmitter is connected with the oxygen separator.
16. The hydrogen production system as claimed in any one of claims 12 to 15, wherein the hydrogen production power source comprises a wind power generation system, or a photovoltaic power generation system, or an ac power grid.
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