CN113549953A - Liquid level balance control method of hydrogen production system and hydrogen production system - Google Patents
Liquid level balance control method of hydrogen production system and hydrogen production system Download PDFInfo
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Abstract
The invention provides a liquid level balance control method of a hydrogen production system and the hydrogen production system, which are applied to the technical field of hydrogen preparation. 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 liquid level changes of the hydrogen separator and the oxygen separator, and the liquid level changes after the fluctuation of the hydrogen production power, so that the adjustment amount can be determined in advance before the final influence of the hydrogen production power on the liquid level deviation, the response time of liquid level adjustment is shorter, the liquid level balance control efficiency is effectively improved, the liquid level fluctuation is smaller, and the liquid level balance control effect is improved.
Description
Technical Field
The invention relates to the technical field of hydrogen preparation, in particular to a liquid level balance 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 liquid levels of the hydrogen separator and the oxygen separator need to be ensured to be in a balanced state, so that the hydrogen and the oxygen are prevented from being mixed, and the safe operation of the hydrogen production system is ensured. As shown in fig. 1, a liquid level detection module is disposed in an existing hydrogen production system and used for detecting a liquid level difference between a hydrogen separator and an oxygen separator, a controller calculates an adjustment amount of a valve according to a detection result fed back by the liquid level detection module, and finally adjusts an opening degree of the valve according to the calculated adjustment amount, so as to keep liquid levels of the hydrogen separator and the oxygen separator balanced.
The inventor researches and discovers that the liquid level balance control method in the prior art belongs to passive regulation, and from the detection of a liquid level difference to the final determination of a regulation amount and the regulation of the valve opening until the liquid level balance is recovered, the whole process takes too long, and the control effect of the liquid level balance is poor.
Disclosure of Invention
The invention provides a liquid level balance control method of a hydrogen production system and the hydrogen production system, wherein a target regulating quantity finally used for regulating the liquid level balance 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 liquid level deviation, so that the liquid level balance control efficiency is effectively improved, and the liquid level balance 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 liquid level balance control method for a hydrogen production system, comprising:
acquiring parameter value variable quantity of a target electrical parameter and a parameter difference value of target state parameters of a hydrogen separator and an oxygen separator;
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 parameter difference;
and adjusting the liquid level of the hydrogen separator and/or the oxygen separator according to the target adjustment amount.
Optionally, the determining a target adjustment amount based on the first adjustment amount and the parameter difference includes:
determining a second regulating quantity according to the parameter difference;
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 parameter difference includes:
and inputting the first regulating quantity and the parameter difference value into a first preset controller to obtain a target regulating quantity.
Optionally, the determining a second adjustment amount according to the parameter difference includes:
and inputting the parameter difference value into a second preset controller to obtain a second regulating quantity corresponding to the parameter 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 absolute value of the parameter value variation is larger than a preset variation threshold value or not;
if the absolute value of the parameter value variation is larger than the preset variation threshold, inputting the parameter value variation into a third preset controller to obtain a first regulating quantity corresponding to the parameter value variation;
and if the absolute value of the parameter value variation is smaller than or equal to the preset variation threshold, 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;
or,
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 input power, input voltage, and input current of the hydrogen production system;
the target condition parameter includes a liquid level or a working pressure.
Optionally, the adjusting the liquid level of the hydrogen separator and/or the oxygen separator according to the target adjustment amount includes:
determining a target opening corresponding to the target adjustment quantity according to a preset mapping relation;
adjusting a liquid level adjusting valve of the hydrogen separator and/or the oxygen separator according to the target opening degree so as to balance the liquid levels of the hydrogen separator and the oxygen separator;
and recording the corresponding relation between the regulating quantity and the opening degree of the liquid level regulating valve in the preset mapping relation.
Optionally, the method for controlling liquid level balance 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 liquid level regulating valve 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 circulating pipeline;
the electrolyte circulation pipeline is respectively connected with the hydrogen separator and the oxygen separator;
the liquid level regulating valve is connected with the hydrogen separator or the oxygen separator;
the hydrogen production controller is respectively connected with the hydrogen separator, the oxygen separator and the liquid level regulating valve, and executes the liquid level balance control method of the hydrogen production system in any one of the first aspect of the invention.
Optionally, the hydrogen production controller is in communication connection with the hydrogen production power supply;
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.
Optionally, the hydrogen production device comprises an alkaline water electrolysis hydrogen production device or a PEM water electrolysis hydrogen production device.
Optionally, the hydrogen separator is provided with a first state parameter acquisition device;
the oxygen separator is provided with a second state parameter acquisition device;
the first state parameter acquisition device and the second state parameter acquisition device are respectively connected with the hydrogen production controller.
Optionally, the hydrogen production system provided by the second aspect of the present invention further comprises: a parameter difference calculating means, wherein,
the first state parameter acquisition device and the second state parameter acquisition device are respectively connected with the hydrogen production controller through the parameter difference calculation device.
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 liquid level balance control method of the hydrogen production system, after parameter value variable quantity of a target electrical parameter and a parameter difference value of a target state parameter of the hydrogen separator and the oxygen separator are obtained, a first regulating quantity is determined according to the parameter value variable quantity, a target regulating quantity is further determined based on the first regulating quantity and the obtained parameter difference value, and finally the liquid level of the hydrogen separator and/or the oxygen separator 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 liquid level changes of the hydrogen separator and the oxygen separator, and the liquid level changes after the fluctuation of the hydrogen production power, so that the adjustment amount can be determined in advance before the final influence of the hydrogen production power on the liquid level deviation, the response time of liquid level adjustment is shorter, the liquid level balance control efficiency is effectively improved, the liquid level fluctuation is smaller, and the liquid level balance control effect is improved.
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 controlling liquid level balance 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 electric power directly used for hydrogen production after the running loss of the system is eliminated has direct influence on the liquid level balance of a hydrogen separator and an oxygen separator in the hydrogen production system, the fluctuation of the hydrogen production power is always accompanied with the fluctuation of the liquid level balance, and the fluctuation of the liquid level balance is inevitably generated after the fluctuation of the hydrogen production power due to the working principle of the water electrolysis hydrogen production system, so the fluctuation of the liquid level balance can be predicted based on the fluctuation of the hydrogen production power of the hydrogen production device, and the liquid level balance control is further carried out in advance.
Based on this, the embodiment of the present invention provides a liquid level balance 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 liquid level balance between a hydrogen separator and an oxygen separator in the hydrogen production system, and may also be applied to other controllers in the hydrogen production system, and certainly, 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 liquid level balance control method of a hydrogen production system according to an embodiment of the present invention, where the flow chart of the liquid level balance control method according to the embodiment may include:
s100, acquiring parameter value variable quantity of a target electrical parameter and a parameter difference value of target state parameters of the hydrogen separator and the oxygen separator.
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 obtained respectively, and then the difference between the obtained parameter values in different control periods is calculated, so as to obtain the parameter value variation of the target electrical parameter in the current control period.
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 liquid level balance control method provided by the embodiment of the invention should 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 liquid level balance 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.
Optionally, the target state parameter includes a liquid level or a working pressure of the gas separator (i.e., the hydrogen separator and the oxygen separator), and correspondingly, the parameter difference of the target state parameter may be a liquid level difference between the hydrogen separator and the oxygen separator, or a working pressure difference between the hydrogen separator and the oxygen separator. Taking the liquid level difference value of the hydrogen separator and the oxygen separator as an example, in practical application, the liquid level value of the hydrogen separator can be obtained to obtain a first liquid level value, the liquid level value of the oxygen separator is obtained to obtain a second liquid level value, and the corresponding liquid level difference value can be obtained by calculating the difference value between the first liquid level value and the second liquid level value or calculating the difference value between the second liquid level value and the first liquid level value. Of course, if the hydrogen production system is provided with the acquisition device which can directly feed back the liquid level difference value between the hydrogen separator and the oxygen separator, the liquid level difference value can also be directly obtained. The process of obtaining the working pressure difference is similar to the process of obtaining the liquid level difference, and the description is omitted here.
It should be noted that, because there is a certain time delay in the liquid level change caused by the hydrogen production power fluctuation, it can be understood that the parameter difference obtained in this step 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 also be caused by other reasons in practical applications. Of course, whatever cause of the state imbalance may be applied to the level balance control of the current control cycle.
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, the liquid level balance of the hydrogen production system is completed through a liquid level regulating valve arranged in the system, and in general, the liquid level regulating valve is arranged in a hydrogen side loop where the hydrogen separator is located, and certainly, the liquid level regulating valve can also be arranged in an oxygen side loop where the oxygen separator is located, or the hydrogen side loop and the oxygen side loop are arranged simultaneously, based on which, the first regulating quantity in the embodiment is specifically used for representing the regulating direction and the valve opening degree of the liquid level regulating 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 liquid level 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 liquid level regulating valve change towards the negative direction that the valve opening degree becomes smaller; correspondingly, if the parameter value variation is zero, the first adjustment amount should be zero, and the current position of the liquid level 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 predetermineeing the variable quantity threshold value, can avoid all adjusting liquid level control valve at every control cycle, effectively reduce liquid level control valve's regulation frequency, help improving liquid level control 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 parameter difference.
The embodiment of the invention provides two methods for determining a target regulating quantity based on a first regulating quantity and a parameter difference value.
The first method comprises the following steps: the second adjustment amount is first determined from the parameter 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 parameter difference, the second preset controller is provided, and the second adjustment amount corresponding to the parameter difference can be obtained by inputting the parameter 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 liquid level regulating device in the hydrogen production system.
In the previous example, in the case that the target state parameter is the liquid level of the gas separator, the liquid level difference may be calculated by subtracting the second liquid level value from the first liquid level value, or by subtracting the first liquid level value from the second liquid level value. For example, if the second adjustment amount corresponds to a difference between the first level value and the second level value, the second adjustment amount cannot be calculated by subtracting the first level value from the second level value, and vice versa. Otherwise the opposite regulating effect will occur.
Based on the premise, if the liquid level difference value is larger than zero, the second regulating quantity is to change the liquid level regulating valve to the positive direction of increasing the valve opening; if the parameter value variation is smaller than zero, the first regulating quantity is to make the liquid level regulating valve change towards the negative direction that the valve opening degree becomes smaller; correspondingly, if the parameter value variation is zero, the first adjustment amount should be zero, and the current position of the liquid level regulating valve is maintained.
The calculation process and the adjustment process of the working pressure of the gas separator are selected as the target state parameters, and can be realized by referring to the above contents, and the details are not repeated here.
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 parameter difference value into a first preset controller to obtain the target regulating quantity.
S130, adjusting the liquid level of the hydrogen separator and/or the oxygen separator according to the target adjustment amount.
After the target regulating quantity is determined, the liquid level of the hydrogen separator and/or the liquid level of the oxygen separator can be regulated according to the target regulating quantity, the liquid level of the hydrogen separator or the liquid level of the oxygen separator can be regulated independently, and the liquid levels of the hydrogen separator and the oxygen separator can also be regulated simultaneously.
Optionally, in the hydrogen production system, when the liquid level balance adjustment is implemented by the liquid level adjustment valve, the embodiment of the present invention provides a preset mapping relationship, where a correspondence relationship between an adjustment amount and an opening degree of the liquid level 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 the liquid level regulating valve of at least one of the hydrogen separator and the oxygen separator can be regulated according to the target opening, so that the liquid levels of the hydrogen separator and the oxygen separator are balanced.
In summary, the liquid level balance control method provided by the embodiment of the invention obtains the parameter value variation of the target electrical parameter related to the hydrogen production power, and determines the first adjustment quantity according to the parameter value variation, and since the hydrogen production power fluctuation directly affects the liquid level changes of the hydrogen separator and the oxygen separator and the liquid level change appears after the hydrogen production power fluctuation, the adjustment quantity can be determined in advance before the hydrogen production power finally affects the liquid level deviation, the liquid level balance control efficiency is effectively improved, and the liquid level balance control effect is improved.
Compared with the passive regulation method in the prior art, the method directly collects the original parameters influencing the liquid level balance, belongs to an active regulation method, and collects electrical parameters more quickly than mechanical signals such as a liquid level difference value, so that the control method provided by the embodiment of the invention has higher execution efficiency, is particularly suitable for a hydrogen production system adopting a 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 a 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 liquid level difference of the hydrogen production system, and compared with the method for determining the regulating quantity by only depending on the liquid level 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 liquid level regulating valve 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;
hydrogen plant links to each other with electrolyte circulation pipeline, and optionally, electrolyte circulation pipeline includes cooler and the intercommunication pipeline shown in figure 3 at least, and under general condition, still can be provided with the electrolyte circulating pump that links to each other with electrolyte circulation pipeline in the hydrogen production system for drive electrolyte circulation, in practical application, electrolyte circulation pipeline can also include other constitutional part, specifically can refer to prior art and realize, and no longer detailed here.
Further, 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 and oxygen from the oxygen separator, and further, fig. 3 also shows a corresponding gas cooling module for further processing the 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 liquid level regulating valve is connected with the hydrogen separator, in some cases, the liquid level regulating valve can also be connected with the oxygen separator, or the liquid level regulating valves are arranged at the hydrogen separator and the oxygen separator simultaneously.
Furthermore, the hydrogen separator is provided with a first state parameter acquisition device for acquiring parameter values of target state parameters of the hydrogen separator, the oxygen separator is provided with a second state parameter acquisition device for acquiring parameter values of the target state parameters of the oxygen separator, and the first state parameter acquisition device and the second state parameter acquisition device are respectively connected with the hydrogen production controller, so that the hydrogen production controller can acquire the parameter values of the target state parameters of the hydrogen separator through the first state parameter acquisition device and acquire the parameter values of the target state parameters of the oxygen separator through the second state parameter acquisition device, and further corresponding parameter difference values are acquired.
Meanwhile, the hydrogen production controller is also connected with a liquid level regulating valve and executes any one of the liquid level balance control methods 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, on the basis of the embodiment shown in fig. 3, the hydrogen production system may further include a parameter difference calculation device, the first state parameter acquisition device and the second state parameter acquisition device are respectively connected to the hydrogen production controller through the parameter difference calculation device, and the hydrogen production controller may directly obtain the parameter difference between the hydrogen separator and the oxygen separator through the parameter difference calculation device without performing calculation.
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. The software modules may be located in random access memory (R level balance M), memory, Read Only Memory (ROM), electrically programmable ROM, electrically erasable programmable ROM, registers, hard disk, removable disk, 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 (17)
1. A method for controlling liquid level balance in a hydrogen production system, comprising:
acquiring parameter value variable quantity of a target electrical parameter and a parameter difference value of target state parameters of a hydrogen separator and an oxygen separator;
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 parameter difference;
and adjusting the liquid level of the hydrogen separator and/or the oxygen separator according to the target adjustment amount.
2. The method of claim 1, wherein determining a target adjustment based on the first adjustment and the parameter difference comprises:
determining a second regulating quantity according to the parameter difference;
a target adjustment amount is determined based on the first adjustment amount and the second adjustment amount.
3. The method of claim 1, wherein determining a target adjustment based on the first adjustment and the parameter difference comprises:
and inputting the first regulating quantity and the parameter difference value into a first preset controller to obtain a target regulating quantity.
4. The method of claim 2, wherein determining a second adjustment based on the parameter difference comprises:
and inputting the parameter difference value into a second preset controller to obtain a second regulating quantity corresponding to the parameter difference value.
5. The method for controlling the liquid level balance of a hydrogen production system according to claim 1, wherein the determining a first adjustment amount according to the parameter value variation 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 method for controlling the liquid level balance of the hydrogen production system according to claim 5, wherein the step of 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 absolute value of the parameter value variation is larger than a preset variation threshold value or not;
if the absolute value of the parameter value variation is larger than the preset variation threshold, inputting the parameter value variation into a third preset controller to obtain a first regulating quantity corresponding to the parameter value variation;
and if the absolute value of the parameter value variation is smaller than or equal to the preset variation threshold, acquiring a first regulating quantity of the previous control period.
7. The method for controlling the liquid level balance of the 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 method for controlling the liquid level balance of the hydrogen production system according to claim 7, wherein the obtaining of the parameter value of the target electrical parameter in the current control period 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;
or,
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 of any of claims 1-8, wherein the target electrical parameter comprises one of input power, input voltage, and input current of the hydrogen production system;
the target condition parameter includes a liquid level or a working pressure.
10. The method for controlling the liquid level balance of the hydrogen production system according to any one of claims 1 to 8, wherein the adjusting the liquid level of the hydrogen separator and/or the oxygen separator according to the target adjustment amount comprises:
determining a target opening corresponding to the target adjustment quantity according to a preset mapping relation;
adjusting a liquid level adjusting valve of the hydrogen separator and/or the oxygen separator according to the target opening degree so as to balance the liquid levels of the hydrogen separator and the oxygen separator;
and recording the corresponding relation between the regulating quantity and the opening degree of the liquid level regulating valve in the preset mapping relation.
11. The method for controlling the liquid level balance of a hydrogen production 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 liquid level regulating valve 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 circulating pipeline;
the electrolyte circulation pipeline is respectively connected with the hydrogen separator and the oxygen separator;
the liquid level regulating valve is connected with the hydrogen separator or the oxygen separator;
the hydrogen production controller is respectively connected with the hydrogen separator, the oxygen separator and the liquid level regulating valve, and executes the liquid level balance 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;
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.
14. The hydrogen generation system of claim 12, wherein the hydrogen generation device comprises an alkaline water electrolysis hydrogen generation device or a PEM water electrolysis hydrogen generation device.
15. The hydrogen production system as claimed in claim 12, wherein the hydrogen separator is provided with a first state parameter acquisition device;
the oxygen separator is provided with a second state parameter acquisition device;
the first state parameter acquisition device and the second state parameter acquisition device are respectively connected with the hydrogen production controller.
16. The hydrogen production system of claim 12, further comprising: a parameter difference calculating means, wherein,
the first state parameter acquisition device and the second state parameter acquisition device are respectively connected with the hydrogen production controller through the parameter difference calculation device.
17. The hydrogen production system as claimed in any one of claims 12 to 16, 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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| PCT/CN2022/109350 WO2023020265A1 (en) | 2021-08-16 | 2022-08-01 | Liquid level balance control method for hydrogen production system and hydrogen production system |
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