CN112987824A - Control method and related device of hydrogen production purification system - Google Patents

Abstract

The invention provides a control method and a related device of a hydrogen production purification system, wherein under the scene that the hydrogen production power of a hydrogen production unit is variable power, in order to avoid the influence of the power change of the hydrogen production power on the hydrogen purification unit, a purification inlet flow regulating value is determined based on the hydrogen production power of the hydrogen production unit, buffer tank parameters of a buffer tank and a flow sampling value of hydrogen flowing into the hydrogen purification unit, and the control of the hydrogen production purification system is carried out based on the purification inlet flow regulating value, so that the control of the hydrogen production purification system is more suitable for the current variable power hydrogen production scene, the control accuracy of the hydrogen production purification system is higher, the hydrogen purification degree is better, and the hydrogen production requirements of users can be met.

Description

Control method and related device of hydrogen production purification system

Technical Field

The invention relates to the field of hydrogen purification, in particular to a control method of a hydrogen production purification system and a related device.

Background

The hydrogen purification system is mainly divided into a two-tower flow and a three-tower flow according to the number of the drying towers, and the purification process of the hydrogen is similar regardless of the two-tower flow or the three-tower flow. Specifically, the hydrogen purification process comprises: the hydrogen produced by the hydrogen production system can be stored in the buffer tank, the hydrogen in the buffer tank can be input into the hydrogen purification system through the purification inlet regulating valve CV for hydrogen purification operation, and the purified hydrogen output by the hydrogen purification system is used by the hydrogen system.

In the hydrogen purification process, the hydrogen purification system has low control accuracy under the scene that the hydrogen production power of the hydrogen production system is variable power, so that the purification degree of the hydrogen output by the hydrogen purification system is poor, and the hydrogen production requirement of a user cannot be met.

Disclosure of Invention

In view of this, the invention provides a control method and a related device for a hydrogen production purification system, so as to solve the problem that the hydrogen production requirement of a user cannot be met due to poor purification degree of hydrogen output by the hydrogen production purification system under the scene that the hydrogen production power of the hydrogen production system is variable power.

In order to solve the technical problems, the invention adopts the following technical scheme:

a control method of a hydrogen production purification system is applied to a controller in the hydrogen production purification system, wherein a hydrogen production unit, a buffer tank and a hydrogen purification unit in the hydrogen production purification system are sequentially connected and are respectively connected with the controller;

the control method comprises the following steps:

acquiring hydrogen production power of the hydrogen production unit and buffer tank parameters of the buffer tank, and determining a purification inlet flow reference value of the hydrogen purification unit corresponding to the hydrogen production power and the buffer tank parameters;

acquiring a flow sampling value of hydrogen flowing into the hydrogen purification unit, and determining a difference value between the purification inlet flow reference value and the flow sampling value as a purification inlet flow adjusting value;

and controlling the hydrogen production purification system based on the purification inlet flow regulating value.

Optionally, obtaining the hydrogen production power of the hydrogen production unit and the buffer tank parameters of the buffer tank includes:

determining whether the hydrogen flux meets the preset regulation rule of the hydrogen production purification system;

and if so, acquiring the hydrogen production power of the hydrogen production unit and the buffer tank parameters of the buffer tank.

Optionally, determining whether the hydrogen flux meets preset hydrogen production purification system adjustment rules comprises:

determining whether the hydrogen gas flux is less than a total hydrogen gas amount required by the hydrogen purification unit; the hydrogen flow rate is the hydrogen flow rate which is output from the buffer tank and reaches the storage tank after passing through the hydrogen purification unit;

and if the hydrogen flux is determined to be smaller than the total hydrogen amount required by the hydrogen purification unit, determining that the hydrogen flux meets the preset adjustment rule of the hydrogen production purification system.

Optionally, obtaining the hydrogen production power of the hydrogen production unit and the buffer tank parameters of the buffer tank includes:

obtaining the hydrogen production power of the hydrogen production unit;

determining a power parameter of the hydrogen production power; the power parameter comprises the change rate of the hydrogen production power or the difference value of the hydrogen production power;

and under the condition that the power parameter is determined to meet a preset power parameter rule, obtaining the buffer tank parameter of the buffer tank.

Optionally, determining a power parameter of the hydrogen production power comprises:

under the condition that the power parameter is the change rate of the hydrogen production power, calculating the change rate of the hydrogen production power based on the hydrogen production power within a first preset time;

and under the condition that the power parameter is the difference value of the hydrogen production power, calculating the difference value of the hydrogen production power based on the change value of the hydrogen production power in different second preset unit time.

Optionally, determining that the power parameter satisfies a preset power parameter rule includes:

determining whether the power parameter is greater than a preset threshold;

and if so, determining that the power parameter meets a preset power parameter rule.

Optionally, the hydrogen production power is non-linear and the value of the hydrogen production power is related to an influencing parameter of an electrical energy output module in the hydrogen production unit.

Optionally, determining a purification inlet flow reference value of the hydrogen purification unit corresponding to the hydrogen production power and the buffer tank parameter comprises:

judging whether the buffer tank pressure in the buffer tank parameters is smaller than a preset pressure threshold value or not;

and if the hydrogen production power is less than the preset hydrogen production power, determining a purification inlet flow reference value of the hydrogen purification unit according to the hydrogen production power and the pressure of the buffer tank.

Optionally, determining a purification inlet flow reference value of the hydrogen purification unit according to the hydrogen production power and the buffer tank pressure, comprising:

obtaining a first purification inlet flow determined based on the hydrogen production power;

determining a second purification inlet flow rate corresponding to the buffer tank pressure;

determining a sum of the first purification inlet flow and the second purification inlet flow as a purification inlet flow reference value for the hydrogen purification unit.

Optionally, obtaining a first purification inlet flow determined based on the hydrogen production power comprises:

acquiring a preset first corresponding relation between the hydrogen production power of the hydrogen production unit and the first purification inlet flow;

based on the first correspondence, a first purification inlet flow rate corresponding to the hydrogen production power of the hydrogen production unit is determined.

Optionally, determining a second purification inlet flow rate corresponding to the buffer tank pressure comprises:

acquiring a second corresponding relation between the preset buffer tank pressure and the second purification inlet flow;

and determining a second purification inlet flow corresponding to the buffer tank pressure based on the second corresponding relation.

Optionally, a storage tank in the hydrogen production purification system is connected with an input end of the hydrogen purification unit; a switch unit is arranged on a passage connecting the storage tank and the input end of the hydrogen purification unit; the switch unit is connected with the controller;

determining a purified inlet flow reference value of the hydrogen purification unit according to the hydrogen production power and the buffer tank pressure, comprising:

controlling the switch unit to be conducted;

and determining a purification inlet flow reference value of the hydrogen purification unit according to the hydrogen production power, the pressure of the buffer tank and the pressure of the storage tank.

Optionally, controlling the hydrogen production purification system based on the purification inlet flow adjustment value comprises:

and determining a target hydrogen purification parameter corresponding to the purification inlet flow regulating value, and controlling the hydrogen production purification system according to the target hydrogen purification parameter.

Optionally, determining a target hydrogen purification parameter corresponding to the purification inlet flow adjustment value, and controlling the hydrogen production purification system according to the target hydrogen purification parameter, including:

determining a valve opening corresponding to the purification inlet flow regulating value based on a preset valve opening determining algorithm, and controlling the opening of a purification inlet regulating valve in the hydrogen production purification system to be the valve opening;

or acquiring a preset corresponding relation between a purification inlet flow regulating value and the valve opening, determining the valve opening corresponding to the purification inlet flow regulating value based on the corresponding relation, and controlling the opening of a purification inlet regulating valve in the hydrogen production purification system to be the valve opening.

Optionally, controlling the hydrogen production purification system based on the purification inlet flow adjustment value comprises:

outputting the purified inlet flow regulating value to a preset terminal so that the preset terminal displays the purified inlet flow regulating value;

and under the condition of receiving a confirmation instruction corresponding to the purification inlet flow regulating value sent by the preset terminal, determining a target hydrogen purification parameter corresponding to the purification inlet flow regulating value, and controlling the hydrogen production purification system according to the target hydrogen purification parameter.

A hydrogen production purification system comprises a hydrogen production unit, a buffer tank, a hydrogen purification unit and a controller; the controller is used for executing the control method of the hydrogen production purification system; and the hydrogen production unit, the buffer tank and the hydrogen purification unit in the hydrogen production purification system are sequentially connected and are respectively connected with the controller.

Optionally, a storage tank is also included; and the output end of the hydrogen purification unit is connected with the input end of the storage tank.

Optionally, the storage tank is further connected with an input end of the hydrogen purification unit; and a switch unit is arranged on a passage connecting the storage tank and the input end of the hydrogen purification unit, and the switch unit is connected with the controller.

Optionally, the storage tank is connected to the input of the hydrogen purification unit through a purification inlet regulating valve in the hydrogen production purification system.

A control device of a hydrogen production purification system is applied to a controller in the hydrogen production purification system, wherein a hydrogen production unit, a buffer tank and a hydrogen purification unit in the hydrogen production purification system are sequentially connected and are respectively connected with the controller;

the control device includes:

the reference value determining module is used for acquiring the hydrogen production power of the hydrogen production unit and the buffer tank parameters of the buffer tank, and determining the purification inlet flow reference value of the hydrogen purification unit corresponding to the hydrogen production power and the buffer tank parameters;

the regulating value determining module is used for acquiring a flow sampling value of the hydrogen flowing into the hydrogen purifying unit and determining a difference value between the purified inlet flow reference value and the flow sampling value as a purified inlet flow regulating value;

and the system control module is used for controlling the hydrogen production purification system based on the purification inlet flow regulating value.

Compared with the prior art, the invention has the following beneficial effects:

the invention provides a control method and a related device of a hydrogen production purification system, wherein under the scene that the hydrogen production power of a hydrogen production unit is variable power, in order to avoid the influence of the power change of the hydrogen production power on the hydrogen purification unit, a purification inlet flow regulating value is determined based on the hydrogen production power of the hydrogen production unit, buffer tank parameters of a buffer tank and a flow sampling value of hydrogen flowing into the hydrogen purification unit, and the control of the hydrogen production purification system is carried out based on the purification inlet flow regulating value, so that the control of the hydrogen production purification system is more suitable for the current variable power hydrogen production scene, the control accuracy of the hydrogen production purification system is higher, the hydrogen purification degree is better, and the hydrogen production requirements of users can be met.

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 embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.

Fig. 1 is a schematic structural diagram of a hydrogen production purification system according to an embodiment of the present invention;

FIG. 2 is a schematic diagram of another hydrogen production purification system provided by an embodiment of the present invention;

fig. 3 is a schematic structural diagram of another hydrogen production purification system provided in an embodiment of the present invention;

fig. 4 is a flow chart illustrating a method for controlling a hydrogen production purification system according to an embodiment of the present invention;

FIG. 5 is a process flow diagram of another method for controlling a hydrogen production purification system provided by an embodiment of the present invention;

fig. 6 is a flow chart illustrating a method of controlling a further hydrogen production purification system according to an embodiment of the present invention;

FIG. 7 is a graph illustrating the relationship between hydrogen production power and first purified inlet flow according to an embodiment of the present invention;

FIG. 8 is a graph illustrating the relationship between the buffer tank pressure and the second purified inlet flow according to an embodiment of the present invention;

fig. 9 is a schematic structural diagram of another hydrogen production purification system provided in an embodiment of the present invention;

fig. 10 is a schematic structural diagram of a fifth hydrogen production purification system provided in the embodiment of the present invention;

fig. 11 is a schematic structural diagram of a control device of a hydrogen production purification system according to an embodiment of the present invention.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, 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 invention.

The existing hydrogen production purification system is mainly divided into a two-tower process and a three-tower process according to the number of drying towers. The two-tower process adopts principle hydrogen as regeneration gas; the three-tower process adopts the product hydrogen as the regeneration gas, has good regeneration effect and is the most applied process at present. The hydrogen production purification system employs a conventional water electrolysis hydrogen production purification system that requires the use of a stable hydrogen flow input.

Referring to fig. 1, the hydrogen production purification system may be composed of a buffer tank, a hydrogen purification unit, and a controller that performs the entire hydrogen purification control, and a large amount of hydrogen is stored in the buffer tank and may be input to the hydrogen purification unit through a purification inlet adjustment valve, so that the hydrogen purification unit performs a hydrogen purification operation.

Further, in order to avoid the hydrogen of storage in the buffer tank to be not enough to support the hydrogen purification unit to use, refer to fig. 2, can set up the hydrogen manufacturing unit at the input of buffer tank, the hydrogen that the hydrogen manufacturing unit produced can be stored in the buffer tank, the hydrogen in the buffer tank can be carried out hydrogen purification operation in the hydrogen purification unit through purification import governing valve CV input, the hydrogen after the purification of hydrogen purification unit output, for the use of hydrogen unit. Wherein, the input end of the hydrogen purification unit is provided with a flow meter F which can collect the hydrogen flow rate flowing into the hydrogen purification system.

Further, referring to fig. 3, after the hydrogen purification unit purifies the hydrogen, in order to avoid that the hydrogen cannot be used in time by the hydrogen unit, a storage tank may be disposed at an output end of the hydrogen purification unit and an input end of the hydrogen unit, that is, the output end of the hydrogen purification unit is connected to the input end of the storage tank, the output end of the storage tank is connected to the input end of the hydrogen unit, and the storage tank may play a role of temporarily storing the hydrogen when the hydrogen unit cannot use up the purified hydrogen in time.

On the basis of fig. 2 and fig. 3, when the electrolytic cell of the hydrogen production unit is operated under the condition of low load, the hydrogen yield is reduced, the flow rate of the regenerated gas is too small, the container and the electric heater are easily damaged, and meanwhile, the incomplete regeneration of the drying tower is easily caused, so that the purity and the quality of the high-purity product hydrogen under the next stage working state are influenced, and the hydrogen production requirement of a user cannot be met. Especially, the existing wind-solar off-grid power-variable hydrogen production needs to solve the problem of hydrogen quality urgently.

Therefore, the inventor finds that in a variable-power hydrogen production scene, if the purification inlet flow regulating value can be determined based on the hydrogen production power of the hydrogen production unit, the buffer tank parameter of the buffer tank and the flow sampling value of the hydrogen flowing into the hydrogen purification unit, and the control of the hydrogen production purification system is performed based on the purification inlet flow regulating value, so that the control of the hydrogen production purification system is more suitable for the current variable-power hydrogen production scene, the control of the hydrogen production purification system is accurate and high, the hydrogen purification degree is good, and the hydrogen production requirement of a user can be met.

Furthermore, the inventor finds that, in the hydrogen purification process, the valve opening of the purification inlet regulating valve is manually and empirically set, so that when the electrolytic cell is under a low load condition, if the valve opening is still unchanged, the flow rate flowing into the hydrogen purification unit is large, the subsequent flow rate is insufficient, and further, in the whole regeneration process, the hydrogen flow rate cannot ensure that the hydrogen is completely regenerated, so that the hydrogen purification degree is low.

Therefore, the inventor finds that the regeneration degree can be improved if the purification inlet regulating valve is adjustable in real time on the basis of the control of the hydrogen production purification system based on the purification inlet flow regulating value in the hydrogen purification process. Further, in the process of adjusting the opening of the valve, if the hydrogen production power and the pressure of the buffer tank can be referred to, the regeneration requirement can be better ensured.

On the basis of the above, the embodiment of the present invention provides a method for controlling a hydrogen production purification system, which is applied to a controller in the hydrogen production purification system, and the controller in this embodiment may be the controller in fig. 1 to 3. The hydrogen production unit, the buffer tank and the hydrogen purification unit in the hydrogen production purification system in this embodiment are sequentially connected and respectively connected to the controller, and the specific connection structure is shown in fig. 2 to 3. Wherein, the hydrogen production unit performs hydrogen production operation based on new energy (unstable energy such as solar energy, wind energy and the like). The hydrogen purification unit may be provided with an outlet valve V that outputs the purified hydrogen to a hydrogen using unit, which may be a fuel cell, a transportation system, or the like.

In the hydrogen production process, if the hydrogen production is insufficient, the produced hydrogen is temporarily stored in a buffer tank, for example, 100m3 gas is required for complete regeneration of purification, and the regeneration time is two hours. At the moment, the hydrogen production amount of the hydrogen production tank in the hydrogen production unit is lower than 50m3/h in two hours on average, the produced hydrogen does not meet the requirement of complete regeneration, and the produced hydrogen is stored in a buffer tank at the moment. The hydrogen in the buffer tank is fed to the hydrogen purification unit when the hydrogen required for complete purification is reached. The hydrogen gas generated in the hydrogen production tank in the hydrogen production unit cannot be discharged to the hydrogen purification unit immediately, and the buffer tank needs to be stored in an amount sufficient for purification and regeneration.

In practical application, referring to fig. 3, the controller may detect the gas pressures of the buffer tank, the hydrogen purification unit and the storage tank, which are P1, P2 and P3 respectively, where P1 is greater than or equal to P2 is greater than or equal to P3, and may further obtain a flow value F detected by the flow meter, where the control object of the controller is the valve opening of the purification inlet regulating valve CV.

In practical application, the hydrogen purification controller is internally preset with upper and lower limits (F _ down, F _ up) of the inlet flow of the hydrogen purification unit.

When the gas flow rate flowing into the hydrogen purification unit is in the range of (F _ down, F _ up) and the regeneration time is the set regeneration time, the condition of complete regeneration can be met, the complete regeneration of hydrogen is ensured, and the purification degree of hydrogen is further ensured.

Based on the above, referring to fig. 4, the method for controlling the hydrogen production purification system may include:

and S11, acquiring the hydrogen production power of the hydrogen production unit and the buffer tank parameters of the buffer tank, and determining the purification inlet flow reference value of the hydrogen purification unit corresponding to the hydrogen production power and the buffer tank parameters.

In practical applications, the hydrogen production power of the hydrogen production unit is represented by P _ e, and the buffer tank parameter of the buffer tank may be the buffer tank pressure, represented by P1.

In another implementation manner of the present invention, there are various implementation manners for obtaining the hydrogen production power of the hydrogen production unit and the buffer tank parameter of the buffer tank, which are described separately.

1. Obtaining the hydrogen production power of the hydrogen production unit and the buffer tank parameters of the buffer tank, including:

and determining whether the hydrogen circulation meets the preset regulation rule of the hydrogen production purification system, and if so, acquiring the hydrogen production power of the hydrogen production unit and the buffer tank parameters of the buffer tank.

In practical application, under the condition that the hydrogen flow flux meets the preset adjustment rule of the hydrogen production purification system, the hydrogen production power of the hydrogen production unit and the buffer tank pressure of the buffer tank are obtained, and the purification inlet flow reference value of the hydrogen purification unit corresponding to the hydrogen production power and the buffer tank pressure is determined.

Specifically, the hydrogen flow rate meets the preset regulation rule of the hydrogen production purification system, namely, the hydrogen flow rate cannot meet the regeneration requirement, and at the moment, the valve needs to be adjusted.

In practical applications, the process of determining that the hydrogen flux satisfies the preset regulation rule of the hydrogen production purification system may include:

determining whether the hydrogen gas flux is less than a total hydrogen gas amount required by the hydrogen purification unit; the hydrogen flow rate is the hydrogen flow rate which is output from the buffer tank and reaches the storage tank after passing through the hydrogen purification unit; and if the hydrogen flux is determined to be smaller than the total hydrogen amount required by the hydrogen purification unit, determining that the hydrogen flux meets the preset adjustment rule of the hydrogen production purification system.

Specifically, assuming that the minimum gas volume required for the hydrogen purification unit to completely regenerate is V1 Nm3 (i.e., the total hydrogen gas amount required by the hydrogen purification unit), the gas volume of the buffer tank gas passing through the hydrogen purification unit to the storage tank is V2 Nm3 (i.e., the hydrogen gas throughput) in view of the fact that the buffer tank gas volume does not increase in extreme weather. There are two cases according to the relationship between V1 and V2:

case 1: v2 is more than or equal to V1

In this case, since the volume of gas that can be purified in the buffer tank meets the regeneration requirements, the effect of buffer tank gas replenishment may not need to be considered.

Case 2: v2< V1

In this case, the volume of the gas that can be purified in the buffer tank does not satisfy the requirement for complete regeneration, and the start-stop and flow rate of the hydrogen purification unit need to be adjusted in combination with specific hydrogen production power and buffer tank pressure.

That is, in the present invention, in the case where V2< V1, the hydrogen gas flow rate in the embodiment of the present invention satisfies the preset regulation rule of the hydrogen production purification system, and at this time, the opening degree of the purification inlet regulating valve CV may be regulated.

In this case, the hydrogen production power of the hydrogen production unit may be obtained by communication between the hydrogen production unit and the controller, and the buffer tank pressure of the buffer tank is P1 described above.

It should be noted that the situation that V2< V1 occurs only when the current time is within the preset operating time (T1-T2) of the hydrogen production unit, that is, if T1< T2, otherwise, the hydrogen in the buffer tank does not enter the hydrogen purification unit, and the buffer tank is full, and the gas is discharged. Wherein, T1 and T2 can be obtained according to a predictive control algorithm or a big data algorithm, etc.

2. Referring to fig. 5, obtaining hydrogen production power of the hydrogen production unit and buffer tank parameters of the buffer tank includes:

and S21, obtaining the hydrogen production power of the hydrogen production unit.

S22, determining the power parameter of the hydrogen production power; the power parameter includes a rate of change of hydrogen production power or a difference in hydrogen production power.

In practical application, under the condition that the power parameter is the change rate of the hydrogen production power, the change rate of the hydrogen production power is calculated based on the hydrogen production power within a first preset time.

Specifically, a preset unit time, such as 1 second, may be selected, and then the hydrogen production power in that time may be obtained and used as the rate of change of the hydrogen production power.

Or, a preset time with a longer time, such as 5 seconds, is selected, then the hydrogen production power within the time is obtained, and the ratio of the hydrogen production power to the preset unit time is used as the change rate of the hydrogen production power.

And under the condition that the power parameter is the difference value of the hydrogen production power, calculating the difference value of the hydrogen production power based on the change value of the hydrogen production power in different second preset time.

Specifically, two continuous unit times can be selected, then the hydrogen production power of each unit time is obtained, and the difference value of the two hydrogen production powers is calculated and used as the difference value of the hydrogen production powers.

And S23, under the condition that the power parameter is determined to meet the preset power parameter rule, obtaining the buffer tank parameter of the buffer tank.

In practical application, whether the power parameter is greater than a preset threshold value or not is determined, and if the power parameter is greater than the preset threshold value, the power parameter is determined to meet a preset power parameter rule.

More specifically, if the change rate of the hydrogen production power is greater than a preset threshold, or the difference between the hydrogen production powers is greater than another preset threshold, it indicates that the hydrogen production power is changed and fluctuated, that is, the hydrogen production purification system can be controlled according to the control method in fig. 3 in the current hydrogen production scene with variable power.

In the variable power hydrogen production scene, the hydrogen production power is nonlinear, and the value of the hydrogen production power is related to the influence parameters of the electric energy output module in the hydrogen production unit. Specifically, the hydrogen production power generated by the solar power supply mode changes with factors such as illumination and temperature, or the hydrogen production power generated by the wind energy (other new energy) power supply mode changes with the change of wind speed, or the hydrogen production power generated by the power grid power supply mode can cause the fluctuation of the hydrogen production power due to the fluctuation of the power grid frequency or voltage.

In another implementation manner of the present invention, when determining a reference value of a purified inlet flow of the hydrogen purification unit corresponding to the hydrogen production power and the buffer tank parameter, such as a buffer tank pressure, whether the buffer tank pressure is smaller than a preset pressure threshold is determined, and if so, a reference value of the purified inlet flow of the hydrogen purification unit is determined according to the hydrogen production power and the buffer tank pressure.

In practical application, the flow is adjusted according to the hydrogen production power, and when the power is small, the flow is small, and when the power is large, the flow is large. When power is great, the hydrogen manufacturing unit can produce more hydrogen, this hydrogen can be saved to the buffer tank in, when hydrogen output is more, the gas in the buffer tank increases rapidly, the condition that the buffer tank is full of needs to be considered this moment, during normal operating condition, the storage tank can not be full of, can adjust the flow and guarantee that the storage tank has the surplus, when the buffer tank is full of, the gas of hydrogen manufacturing groove output in the hydrogen manufacturing unit can directly be emptied to avoid the buffer tank to be full of. That is, in the specific implementation process, during the valve adjustment, it is required to ensure that the buffer tank is not filled, at this time, whether the buffer tank is filled or not can be determined by the buffer tank pressure, and when the pressure is smaller than a preset pressure threshold value, it indicates that the buffer tank is not filled, at this time, a purification inlet flow reference value of the hydrogen purification unit is determined according to the hydrogen production power and the buffer tank pressure. When the pressure is larger than the preset pressure threshold value, the hydrogen production tank is full, and the gas produced by the hydrogen production tank is directly emptied.

And S12, acquiring a flow sampling value of the hydrogen flowing into the hydrogen purification unit, and determining the difference value between the purification inlet flow reference value and the flow sampling value as a purification inlet flow adjusting value.

In specific application, the flow sampling value of the hydrogen flowing into the hydrogen purification unit is the flow sampling value collected by the flowmeter, specifically F, and F can be obtained through communication between the flowmeter and the controller. Wherein F is the actual flow passing through the purification inlet regulating valve, and the reference value of the purification inlet flow is the flow that should pass through the purification inlet regulating valve under the ideal state, and the difference therebetween is the flow that needs to be regulated, which is the adjustment value of the purification inlet flow in this embodiment.

And S13, controlling the hydrogen production purification system based on the purification inlet flow regulating value.

In practical application, a target hydrogen purification parameter corresponding to the purification inlet flow regulating value is determined, and the hydrogen production purification system is controlled according to the target hydrogen purification parameter.

Specifically, the target hydrogen purification parameter may be the valve opening of the purification inlet regulating valve. In practical applications, the valve opening of the purification inlet regulating valve should be adjusted so that the flow passing through the purification inlet regulating valve is changed to the above-mentioned purification inlet flow reference value. The valve opening adjustment amount in this embodiment corresponds to the purification inlet flow adjustment value, and when the valve opening is determined by the purification inlet flow adjustment value, a preset valve opening determination algorithm, such as a PID adjustment algorithm, may be used to determine the valve opening corresponding to the purification inlet flow adjustment value, and control the opening of the purification inlet adjustment valve in the hydrogen production purification system to be the valve opening. In addition, the corresponding relationship between the purification inlet flow regulating value and the valve opening can be preset, then the valve opening corresponding to the purification inlet flow regulating value is obtained and inquired from the corresponding relationship, and the opening of the purification inlet regulating valve in the hydrogen production purification system is controlled to be the valve opening.

It should be noted that, regardless of the preset valve opening determination algorithm or the preset corresponding relationship between the purified inlet flow adjustment value and the valve opening, the method is a scheme for automatically determining the valve opening after the controller obtains the purified inlet flow adjustment value. In order to improve the reliability of the control, after obtaining the purified inlet flow regulating value, manual participation can be introduced when the opening of the valve is regulated. Specifically, the controlling of the hydrogen production purification system based on the purification inlet flow adjustment value may include:

1) and outputting the purified inlet flow regulating value to a preset terminal so that the preset terminal displays the purified inlet flow regulating value.

The preset terminal can be a mobile phone, a tablet and other equipment of a technician. When the preset terminal displays the purification inlet flow regulating value, technicians can see the current purification inlet flow regulating value, and at the moment, the opening of the valve can be manually adjusted, so that the purification inlet flow regulating value is zero.

In addition, in order to improve convenience, when the preset terminal displays the purification inlet flow regulating value, a confirmation button is also displayed, and a technician can remotely control the opening of the valve by clicking the confirmation button.

2) And under the condition of receiving a confirmation instruction corresponding to the purification inlet flow regulating value sent by the preset terminal, determining a target hydrogen purification parameter corresponding to the purification inlet flow regulating value, and controlling the hydrogen production purification system according to the target hydrogen purification parameter.

Under the condition that a technician clicks a confirmation button, the controller receives a confirmation instruction corresponding to the purification inlet flow regulating value sent by a preset terminal, then determines a target hydrogen purification parameter corresponding to the purification inlet flow regulating value, and controls the hydrogen production purification system according to the target hydrogen purification parameter. Specifically, the implementation process of "determining the target hydrogen purification parameter corresponding to the purification inlet flow adjustment value, and controlling the hydrogen production purification system according to the target hydrogen purification parameter" may refer to the corresponding description in the above embodiments, and will not be described herein again.

In this embodiment, under the scene that the hydrogen production power of hydrogen production unit is the variable power, in order to avoid the influence of the power change of hydrogen production power on the hydrogen purification unit, purification import flow adjustment value can be determined based on the hydrogen production power of hydrogen production unit, the buffer tank parameter of buffer tank, and the flow sampling value of the hydrogen that flows into the hydrogen purification unit, and based on purification import flow adjustment value, control of hydrogen production purification system is carried out, and then make the control of hydrogen production purification system be applicable to current variable power hydrogen production scene more, the control of hydrogen production purification system is accurate higher, the hydrogen purification degree is better, can satisfy user's hydrogen production demand.

More specifically, in this embodiment, the valve aperture of purification import governing valve is adjustable, and adjust based on the hydrogen manufacturing power of hydrogen manufacturing unit and the pressure of buffer tank, make the flow that enters into the hydrogen manufacturing unit and the hydrogen manufacturing power of current hydrogen manufacturing unit and the pressure phase-match of buffer tank, and then make the valve aperture after the adjustment more be applicable to current variable power hydrogen manufacturing scene, the valve aperture is adjusted accurately higher, then the hydrogen flow that flows into the hydrogen manufacturing unit can satisfy the regeneration demand, hydrogen purification degree is better, can satisfy user's hydrogen manufacturing demand.

In addition, in the embodiment of the invention, parameters such as hydrogen production power, buffer tank pressure and the like are detected in real time, and when one or more parameters change, the purification inlet regulating valve is automatically regulated, so that the flow is regulated to meet the requirement of complete regeneration. In addition, when the valve is adjusted, the opening of the valve can be adjusted by taking the pressure of the storage tank as reference, namely according to the hydrogen production power, the pressure of the buffer tank and the pressure of the storage tank.

In addition, the valve opening of the purification inlet regulating valve is calculated by the controller instead of being estimated according to empirical values, so that the calculation accuracy is high, the valve opening regulation accuracy is high, and the regeneration requirement of hydrogen is met. And after the valve opening degree is obtained through calculation, the controller can directly control the valve opening degree to adjust, manual adjustment is not needed, and manpower is saved. In addition, the control method can be suitable for various hydrogen production unit process flows, and the applicability is strong.

In the above embodiment, the valve adjustment is generally performed when the amount of hydrogen generated by the hydrogen generation unit is small, and in addition, the embodiment of the invention can also be applied to one adjustment when the amount of generated hydrogen is large (for example, more hydrogen is generated in photovoltaic power generation), so that more hydrogen is prevented from entering the hydrogen purification unit, and the hydrogen waste is avoided.

In the above embodiments, referring to "determining the purified inlet flow reference value of the hydrogen purification unit according to the hydrogen production power and the buffer tank pressure", a specific implementation process of the method is described, and specifically, referring to fig. 6, determining the purified inlet flow reference value of the hydrogen purification unit according to the hydrogen production power and the buffer tank pressure may include:

s31, obtaining a first purification inlet flow determined based on the hydrogen production power.

In practical applications, the first purification inlet flow rate is represented by F _ ref1, and a first corresponding relationship between the hydrogen production power of the hydrogen production unit and the first purification inlet flow rate may be preset, and then the first purification inlet flow rate corresponding to the hydrogen production power of the hydrogen production unit is obtained by querying the first corresponding relationship.

The first corresponding relation is shown in a curve of fig. 7, wherein the abscissa is hydrogen production power P _ e, the ordinate is first purification inlet flow F _ ref1, Pn is rated power, the curve can be an oblique line, the slope is calculated according to actual conditions, and F _ down and F _ up are respectively the upper and lower limits of flow; the curve can also be of a step type, so that the problem that the system cannot be stable due to insufficient control precision of the regulating valve can be prevented.

And S32, determining a second purification inlet flow corresponding to the buffer tank pressure.

In practical application, because the new energy hydrogen production is intermittent and the hydrogen production power is unstable, the gas volume V2 from the buffer tank to the storage tank through the hydrogen purification unit is enough when extreme conditions are considered, such as the working condition that the hydrogen production power is zero, the lower pressure limit P1_ down of the buffer tank is set, and the lower pressure limit P1_ down can be a constant lower pressure limit or can be calculated according to the residual regeneration time; the specific parameters can be finely adjusted according to experimental results. The buffer tank also has an upper buffer tank pressure limit P1_ up, P1_ up may be the preset pressure threshold described above.

The buffer tank pressure is denoted by P1 and the second purified inlet flow is denoted by F _ ref2, which can be compensated for the buffer tank pressure to give F _ ref 2. Specifically, a second corresponding relationship between the buffer tank pressure and a second purification inlet flow rate may be preset, and the second purification inlet flow rate corresponding to the buffer tank pressure is obtained by querying the second corresponding relationship.

Second correspondence referring to fig. 8, the relationship between F _ ref2 and P1 is a staircase type. F _ ref2 is only used for fine adjustment of F _ ref1, and since F _ ref1 satisfies F _ down and F _ up, F _ ref1 after fine adjustment is also located between F _ down and F _ up, thereby satisfying the flow requirement during regeneration.

S33, determining the sum of the first purification inlet flow and the second purification inlet flow as the purification inlet flow reference value of the hydrogen purification unit.

Specifically, the final purified inlet flow reference F _ ref is calculated from the first two steps.

Wherein F _ ref is F _ ref1+ F _ ref 2.

In this embodiment, by presetting the first corresponding relationship between the hydrogen production power of the hydrogen production unit and the first purification inlet flow and the second corresponding relationship between the pressure of the buffer tank and the second purification inlet flow, the corresponding relationship can be directly inquired to obtain required data when the opening of the valve is adjusted, and the efficiency is high.

In the above embodiment, the purification inlet flow reference value is determined by the hydrogen production power and the buffer tank pressure, and in addition, when the purification inlet flow reference value is determined, the storage tank pressure may also be used, specifically, referring to fig. 9, the storage tank in the hydrogen production purification system is connected to the input end of the hydrogen purification unit; specifically, the storage tank may be connected to the input of the hydrogen purification unit through a purification inlet regulating valve in the hydrogen production purification system. The storage tank with on the route that the input of hydrogen purification unit is connected, be provided with the switch unit, the switch unit with the controller is connected, and the switch unit can be parts such as valve, and when the hydrogen volume of buffer tank was not enough, can open the switch unit for the hydrogen that the hydrogen in the storage tank is anti-to-mend hydrogen purification unit needs. When the switch unit is opened, the hydrogen in the storage tank can flow into the CV valve, and at the moment, the hydrogen and the hydrogen in the buffer tank can flow into the CV valve together, so that the hydrogen purification unit can have enough hydrogen. When the switching unit is turned off, only the hydrogen gas in the buffer tank flows into the CV valve.

At this time, determining a purification inlet flow reference value of the hydrogen purification unit according to the hydrogen production power and the buffer tank pressure includes:

and controlling the switch unit to be conducted, and determining a purification inlet flow reference value of the hydrogen purification unit according to the hydrogen production power, the pressure of the buffer tank and the pressure of the storage tank.

Specifically, a first purification inlet flow determined based on the hydrogen production power may be obtained, and a second purification inlet flow corresponding to the buffer tank pressure may be determined, where the determination process of the first purification inlet flow and the second purification inlet flow may refer to the corresponding description in the above embodiments.

In addition, a third corresponding relation between the storage tank pressure and the third purification inlet flow can be preset, the current storage tank pressure is obtained, and the third corresponding relation is inquired to obtain the third purification inlet flow.

And taking the sum of the first purification inlet flow, the second purification inlet flow and the third purification inlet flow as a purification inlet flow reference value of the hydrogen purification unit.

It should be noted that, when the pressure of the storage tank is greater than the preset pressure of the storage tank, it indicates that the content of the hydrogen stored in the storage tank is relatively large, and the storage tank may have risks of hydrogen leakage and explosion, and at this time, in order to ensure the safety of the storage tank, the hydrogen output by the hydrogen purification unit may be protected from air.

In another embodiment of the present invention, when the hydrogen stored in the buffer tank is sufficient to realize hydrogen regeneration, i.e. V2 ≧ V1, then the input end of the buffer tank need not be connected to the hydrogen production unit, refer to fig. 10 in particular.

In this embodiment, when determining the purified inlet flow reference value, not only the hydrogen production power and the buffer tank pressure are considered, but also the storage tank pressure is considered, and the mode of consideration is more comprehensive, so that the accuracy of the purified inlet flow reference value obtained by calculation is higher.

Optionally, on the basis of the above embodiment of the method for controlling a hydrogen production purification system, another embodiment of the present invention provides a control device of a hydrogen production purification system, which is applied to a controller in the hydrogen production purification system, wherein a hydrogen production unit, a buffer tank and a hydrogen purification unit in the hydrogen production purification system are sequentially connected and respectively connected to the controller;

the control device includes:

a reference value determining module 11, configured to obtain hydrogen production power of the hydrogen production unit and buffer tank parameters of the buffer tank, and determine a purification inlet flow reference value of the hydrogen purification unit corresponding to the hydrogen production power and the buffer tank parameters;

an adjusting value determining module 12, configured to obtain a flow sampling value of the hydrogen flowing into the hydrogen purification unit, and determine a difference between the purification inlet flow reference value and the flow sampling value as a purification inlet flow adjusting value;

and the system control module 13 is used for controlling the hydrogen production purification system based on the purification inlet flow regulating value.

Further, when the reference value determining module 11 is used for obtaining the hydrogen production power of the hydrogen production unit and the buffer tank parameter of the buffer tank, it is specifically configured to:

determining whether the hydrogen flux meets the preset regulation rule of the hydrogen production purification system;

and if so, acquiring the hydrogen production power of the hydrogen production unit and the buffer tank parameters of the buffer tank.

Further, the reference value determining module 11 is configured to, when determining whether the hydrogen flux satisfies a preset regulation rule of the hydrogen production purification system, specifically:

determining whether the hydrogen gas flux is less than a total hydrogen gas amount required by the hydrogen purification unit; the hydrogen flow rate is the hydrogen flow rate which is output from the buffer tank and reaches the storage tank after passing through the hydrogen purification unit;

and if the hydrogen flux is determined to be smaller than the total hydrogen amount required by the hydrogen purification unit, determining that the hydrogen flux meets the preset adjustment rule of the hydrogen production purification system.

Further, when the reference value determining module 11 is used for obtaining the hydrogen production power of the hydrogen production unit and the buffer tank parameter of the buffer tank, it is specifically configured to:

obtaining the hydrogen production power of the hydrogen production unit;

determining a power parameter of the hydrogen production power; the power parameter comprises the change rate of the hydrogen production power or the difference value of the hydrogen production power;

and under the condition that the power parameter is determined to meet a preset power parameter rule, obtaining the buffer tank parameter of the buffer tank.

Further, when the reference value determining module 11 is configured to determine the power parameter of the hydrogen production power, specifically:

under the condition that the power parameter is the change rate of the hydrogen production power, calculating the change rate of the hydrogen production power based on the hydrogen production power within a first preset time;

and under the condition that the power parameter is the difference value of the hydrogen production power, calculating the difference value of the hydrogen production power based on the change value of the hydrogen production power in different second preset unit time.

Further, the reference value determining module 11 is configured to, when determining that the power parameter meets a preset power parameter rule, specifically:

determining whether the power parameter is greater than a preset threshold;

and if so, determining that the power parameter meets a preset power parameter rule.

Further, the hydrogen production power is non-linear and the value of the hydrogen production power is related to an influencing parameter of an electric energy output module in the hydrogen production unit.

Further, the reference value determination module 11 includes:

the judgment submodule is used for judging whether the buffer tank pressure in the buffer tank parameters is smaller than a preset pressure threshold value or not;

and the reference value determining submodule is used for determining a purification inlet flow reference value of the hydrogen purification unit according to the hydrogen production power and the pressure of the buffer tank if the hydrogen production power is smaller than the buffer tank pressure.

Further, the reference value determination sub-module includes:

a first flow determination unit for obtaining a first purification inlet flow determined based on the hydrogen production power;

a second flow determination unit for determining a second purification inlet flow corresponding to the buffer tank pressure;

a reference value determination unit for determining the sum of the first purification inlet flow and the second purification inlet flow as the purification inlet flow reference value of the hydrogen purification unit.

Further, the first flow rate determination unit is specifically configured to:

acquiring a preset first corresponding relation between the hydrogen production power of the hydrogen production unit and the first purification inlet flow;

based on the first correspondence, a first purification inlet flow rate corresponding to the hydrogen production power of the hydrogen production unit is determined.

Further, the second flow rate determination unit is specifically configured to:

acquiring a second corresponding relation between the preset buffer tank pressure and the second purification inlet flow;

and determining a second purification inlet flow corresponding to the buffer tank pressure based on the second corresponding relation.

Further, a storage tank in the hydrogen production purification system is connected with the input end of the hydrogen purification unit; a switch unit is arranged on a passage connecting the storage tank and the input end of the hydrogen purification unit; the switch unit is connected with the controller.

Then, the reference value determination submodule is specifically configured to:

controlling the switch unit to be conducted;

and determining a purification inlet flow reference value of the hydrogen purification unit according to the hydrogen production power, the pressure of the buffer tank and the pressure of the storage tank.

Further, the system control module 13 is specifically configured to:

and determining a target hydrogen purification parameter corresponding to the purification inlet flow regulating value, and controlling the hydrogen production purification system according to the target hydrogen purification parameter.

Further, the system control module 13 is configured to determine a target hydrogen purification parameter corresponding to the purification inlet flow adjustment value, and when controlling the hydrogen production purification system according to the target hydrogen purification parameter, specifically configured to:

determining a valve opening corresponding to the purification inlet flow regulating value based on a preset valve opening determining algorithm, and controlling the opening of a purification inlet regulating valve in the hydrogen production purification system to be the valve opening;

or acquiring a preset corresponding relation between a purification inlet flow regulating value and the valve opening, determining the valve opening corresponding to the purification inlet flow regulating value based on the corresponding relation, and controlling the opening of a purification inlet regulating valve in the hydrogen production purification system to be the valve opening.

Further, the system control module 13 is specifically configured to:

outputting the purified inlet flow regulating value to a preset terminal so that the preset terminal displays the purified inlet flow regulating value;

and under the condition of receiving a confirmation instruction corresponding to the purification inlet flow regulating value sent by the preset terminal, determining a target hydrogen purification parameter corresponding to the purification inlet flow regulating value, and controlling the hydrogen production purification system according to the target hydrogen purification parameter.

In this embodiment, under the scene that the hydrogen production power of hydrogen production unit is the variable power, in order to avoid the influence of the power change of hydrogen production power on the hydrogen purification unit, purification import flow adjustment value can be determined based on the hydrogen production power of hydrogen production unit, the buffer tank parameter of buffer tank, and the flow sampling value of the hydrogen that flows into the hydrogen purification unit, and based on purification import flow adjustment value, control of hydrogen production purification system is carried out, and then make the control of hydrogen production purification system be applicable to current variable power hydrogen production scene more, the control of hydrogen production purification system is accurate higher, the hydrogen purification degree is better, can satisfy user's hydrogen production demand.

It should be noted that, for the working processes of each module, sub-module, and unit in this embodiment, please refer to the corresponding description in the above embodiments, which is not described herein again.

Alternatively, on the basis of the above embodiments of the method and apparatus for controlling a hydrogen production purification system, another embodiment of the present invention provides a controller for executing the above method for controlling a hydrogen production purification system.

Optionally, on the basis of the above embodiment of the method and apparatus for controlling a hydrogen production purification system, another embodiment of the present invention provides a hydrogen production purification system, which includes a hydrogen production unit, a buffer tank, and a hydrogen purification unit, and further includes the above controller; and the hydrogen production unit, the buffer tank and the hydrogen purification unit in the hydrogen production purification system are sequentially connected and are respectively connected with the controller.

Further, the device also comprises a storage tank; and the output end of the hydrogen purification unit is connected with the input end of the storage tank.

Further, the storage tank is also connected with the input end of the hydrogen purification unit; and a switch unit is arranged on a passage connecting the storage tank and the input end of the hydrogen purification unit, and the switch unit is connected with the controller.

Further, the storage tank is connected with the input end of the hydrogen purification unit through a purification inlet regulating valve in the hydrogen production purification system.

Further, the switch unit is a valve.

It should be noted that, for the specific structure of the hydrogen production purification system in this embodiment, please refer to the corresponding description in the above embodiments, which is not repeated herein.

In this embodiment, under the scene that the hydrogen production power of hydrogen production unit is the variable power, in order to avoid the influence of the power change of hydrogen production power on the hydrogen purification unit, purification import flow adjustment value can be determined based on the hydrogen production power of hydrogen production unit, the buffer tank parameter of buffer tank, and the flow sampling value of the hydrogen that flows into the hydrogen purification unit, and based on purification import flow adjustment value, control of hydrogen production purification system is carried out, and then make the control of hydrogen production purification system be applicable to current variable power hydrogen production scene more, the control of hydrogen production purification system is accurate higher, the hydrogen purification degree is better, can satisfy user's hydrogen production demand.

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 (20)

1. The control method of the hydrogen production purification system is characterized by being applied to a controller in the hydrogen production purification system, wherein a hydrogen production unit, a buffer tank and a hydrogen purification unit in the hydrogen production purification system are sequentially connected and are respectively connected with the controller;

the control method comprises the following steps:

acquiring hydrogen production power of the hydrogen production unit and buffer tank parameters of the buffer tank, and determining a purification inlet flow reference value of the hydrogen purification unit corresponding to the hydrogen production power and the buffer tank parameters;

acquiring a flow sampling value of hydrogen flowing into the hydrogen purification unit, and determining a difference value between the purification inlet flow reference value and the flow sampling value as a purification inlet flow adjusting value;

and controlling the hydrogen production purification system based on the purification inlet flow regulating value.

2. The control method of claim 1, wherein obtaining hydrogen production power of the hydrogen production unit and buffer tank parameters of the buffer tank comprises:

determining whether the hydrogen flux meets the preset regulation rule of the hydrogen production purification system;

and if so, acquiring the hydrogen production power of the hydrogen production unit and the buffer tank parameters of the buffer tank.

3. The control method of claim 2, wherein determining whether the hydrogen gas flux meets preset hydrogen production purification system adjustment rules comprises:

determining whether the hydrogen gas flux is less than a total hydrogen gas amount required by the hydrogen purification unit; the hydrogen flow rate is the hydrogen flow rate which is output from the buffer tank and reaches the storage tank after passing through the hydrogen purification unit;

and if the hydrogen flux is determined to be smaller than the total hydrogen amount required by the hydrogen purification unit, determining that the hydrogen flux meets the preset adjustment rule of the hydrogen production purification system.

4. The control method of claim 1, wherein obtaining hydrogen production power of the hydrogen production unit and buffer tank parameters of the buffer tank comprises:

obtaining the hydrogen production power of the hydrogen production unit;

determining a power parameter of the hydrogen production power; the power parameter comprises the change rate of the hydrogen production power or the difference value of the hydrogen production power;

and under the condition that the power parameter is determined to meet a preset power parameter rule, obtaining the buffer tank parameter of the buffer tank.

5. The control method of claim 4, wherein determining a power parameter of the hydrogen production power comprises:

under the condition that the power parameter is the change rate of the hydrogen production power, calculating the change rate of the hydrogen production power based on the hydrogen production power within a first preset time;

and under the condition that the power parameter is the difference value of the hydrogen production power, calculating the difference value of the hydrogen production power based on the change value of the hydrogen production power in different second preset unit time.

6. The control method of claim 5, wherein determining that the power parameter satisfies a preset power parameter rule comprises:

determining whether the power parameter is greater than a preset threshold;

and if so, determining that the power parameter meets a preset power parameter rule.

7. The control method of claim 4, wherein the hydrogen production power is non-linear and the value of the hydrogen production power is related to an influencing parameter of an electrical energy output module in the hydrogen production unit.

8. The control method of claim 1, wherein determining a purification inlet flow reference value for the hydrogen purification unit corresponding to the hydrogen production power and the buffer tank parameter comprises:

judging whether the buffer tank pressure in the buffer tank parameters is smaller than a preset pressure threshold value or not;

and if the hydrogen production power is less than the preset hydrogen production power, determining a purification inlet flow reference value of the hydrogen purification unit according to the hydrogen production power and the pressure of the buffer tank.

9. The control method of claim 8, wherein determining a purification inlet flow reference value for the hydrogen purification unit based on the hydrogen production power and the buffer tank pressure comprises:

obtaining a first purification inlet flow determined based on the hydrogen production power;

determining a second purification inlet flow rate corresponding to the buffer tank pressure;

determining a sum of the first purification inlet flow and the second purification inlet flow as a purification inlet flow reference value for the hydrogen purification unit.

10. The control method of claim 9, wherein obtaining a first purification inlet flow determined based on the hydrogen production power comprises:

acquiring a preset first corresponding relation between the hydrogen production power of the hydrogen production unit and the first purification inlet flow;

based on the first correspondence, a first purification inlet flow rate corresponding to the hydrogen production power of the hydrogen production unit is determined.

11. The control method of claim 9, wherein determining a second purification inlet flow rate corresponding to the buffer tank pressure comprises:

acquiring a second corresponding relation between the preset buffer tank pressure and the second purification inlet flow;

and determining a second purification inlet flow corresponding to the buffer tank pressure based on the second corresponding relation.

12. The control method of claim 8, wherein a storage tank in the hydrogen production purification system is connected to an input of the hydrogen purification unit; a switch unit is arranged on a passage connecting the storage tank and the input end of the hydrogen purification unit; the switch unit is connected with the controller;

determining a purified inlet flow reference value of the hydrogen purification unit according to the hydrogen production power and the buffer tank pressure, comprising:

controlling the switch unit to be conducted;

and determining a purification inlet flow reference value of the hydrogen purification unit according to the hydrogen production power, the pressure of the buffer tank and the pressure of the storage tank.

13. The control method of claim 1, wherein controlling the hydrogen production purification system based on the purification inlet flow adjustment value comprises:

and determining a target hydrogen purification parameter corresponding to the purification inlet flow regulating value, and controlling the hydrogen production purification system according to the target hydrogen purification parameter.

14. The control method according to claim 13, wherein determining a target hydrogen purification parameter corresponding to the purification inlet flow adjustment value and controlling the hydrogen production purification system according to the target hydrogen purification parameter comprises:

determining a valve opening corresponding to the purification inlet flow regulating value based on a preset valve opening determining algorithm, and controlling the opening of a purification inlet regulating valve in the hydrogen production purification system to be the valve opening;

or acquiring a preset corresponding relation between a purification inlet flow regulating value and the valve opening, determining the valve opening corresponding to the purification inlet flow regulating value based on the corresponding relation, and controlling the opening of a purification inlet regulating valve in the hydrogen production purification system to be the valve opening.

15. The control method of claim 1, wherein controlling the hydrogen production purification system based on the purification inlet flow adjustment value comprises:

outputting the purified inlet flow regulating value to a preset terminal so that the preset terminal displays the purified inlet flow regulating value;

and under the condition of receiving a confirmation instruction corresponding to the purification inlet flow regulating value sent by the preset terminal, determining a target hydrogen purification parameter corresponding to the purification inlet flow regulating value, and controlling the hydrogen production purification system according to the target hydrogen purification parameter.

16. A hydrogen production purification system comprises a hydrogen production unit, a buffer tank and a hydrogen purification unit, and is characterized by also comprising a controller; the controller is configured to perform a method of controlling a hydrogen production purification system as recited in claims 1-15; and the hydrogen production unit, the buffer tank and the hydrogen purification unit in the hydrogen production purification system are sequentially connected and are respectively connected with the controller.

17. The hydrogen production purification system as recited in claim 16, further comprising a storage tank; and the output end of the hydrogen purification unit is connected with the input end of the storage tank.

18. The hydrogen-producing purification system of claim 17, wherein the storage tank is further connected to an input of the hydrogen purification unit; and a switch unit is arranged on a passage connecting the storage tank and the input end of the hydrogen purification unit, and the switch unit is connected with the controller.

19. The hydrogen-producing purification system of claim 18, wherein the storage tank is connected to the input of the hydrogen purification unit through a purification inlet regulating valve in the hydrogen-producing purification system.

20. The control device of the hydrogen production purification system is characterized by being applied to a controller in the hydrogen production purification system, wherein a hydrogen production unit, a buffer tank and a hydrogen purification unit in the hydrogen production purification system are sequentially connected and respectively connected with the controller;

the control device includes:

the reference value determining module is used for acquiring the hydrogen production power of the hydrogen production unit and the buffer tank parameters of the buffer tank, and determining the purification inlet flow reference value of the hydrogen purification unit corresponding to the hydrogen production power and the buffer tank parameters;

the regulating value determining module is used for acquiring a flow sampling value of the hydrogen flowing into the hydrogen purifying unit and determining a difference value between the purified inlet flow reference value and the flow sampling value as a purified inlet flow regulating value;

and the system control module is used for controlling the hydrogen production purification system based on the purification inlet flow regulating value.

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