CN114351164A - Modular water electrolysis hydrogen production system and control method thereof - Google Patents
Modular water electrolysis hydrogen production system and control method thereof Download PDFInfo
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Abstract
The invention particularly relates to a modular water electrolysis hydrogen production system and a control method thereof, wherein the system comprises a renewable energy power generation system, an energy management monitoring system, an electrolysis unit module group and an energy storage system, the renewable energy power generation system comprises a renewable energy power generation device and a rectification inversion device, the electrolysis unit module group comprises a plurality of electrolysis unit modules, the energy storage system comprises an inversion device and an energy storage battery pack, and the energy management monitoring system is respectively in communication connection with the renewable energy power generation system, the electrolysis unit module group and the energy storage system; the method comprises the steps of obtaining the number of the electrolytic unit modules in a production state, a standby state and a shutdown state, and calculating the residual load sum P of the electrolytic unit modules in the production state and the standby statetotalPredicting the next time of the renewable energy power generation system according to the weather forecast systemThe power generation amount increment of the segment and the next segment is delta P1 and delta P2 according to delta P1, delta P2 and PtotalDetermines how the state of the electrolysis cell is switched and the number of switches.
Description
Technical Field
The invention relates to the technical field of new energy, in particular to a modular water electrolysis hydrogen production system and a control method thereof.
Background
With the proposed 3060 dual carbon target, hydrogen is increasingly being mentioned as an energy carrier due to its green environmental characteristics. Among the numerous hydrogen production technologies, the water electrolysis hydrogen production technology is considered as the mainstream hydrogen production technology in the future because the whole hydrogen production process can really achieve zero carbon when the technology is coupled with renewable energy sources. However, the hydrogen production capacity of the current single electrolytic cell is relatively small, and the hydrogen demand in fields such as future industry and the like is difficult to meet the extremely rapid increase. Meanwhile, the volatility problem of renewable energy sources also brings hidden troubles to the safety and the hydrogen purity of hydrogen production by water electrolysis.
In order to increase the scale of hydrogen production and overcome the problem of the fluctuation of renewable energy sources, a mode of combining multiple electrolysis unit modules can be adopted to realize large-scale centralized hydrogen production, and the fluctuation of the power of the renewable energy sources can be responded by controlling the change of the number of the electrolysis bath switches.
However, the current strategy usually ignores the start-stop time of the electrolytic cell and the power consumption during start-stop, and in practical application, the problems of unstable hydrogen production, slow response of the electrolytic cell system and the like can be encountered, so that the safety of the whole system is influenced.
Meanwhile, when a plurality of electrolytic cells participate in the electrolytic process at the same time, how to effectively distribute the power of each hydrogen production unit is also a difficult problem which needs to be solved urgently by the modularized electrolytic cell group. For a water electrolysis hydrogen production system, the electrolysis current determines the hydrogen production amount, and the electrolysis voltage determines the electrolysis efficiency. Therefore, even if the external input power is the same, the number of the electrolysis units operated affects the hydrogen production of the whole system. From the electrolysis principle, the smaller the work load of the electrolytic cell, the higher the work efficiency of the electrolytic cell. Thus, under normal conditions, the choice of operating a plurality of cells at low load will result in greater electrolysis efficiency and greater hydrogen production than would be achieved if a small number of cells were operated at high load. However, under low load conditions, there are safety issues due to low oxygen purity, and system efficiency decreases with decreasing load at some critical point due to the presence of auxiliary system energy consumption.
Disclosure of Invention
The invention aims to provide a modular water electrolysis hydrogen production system and a control method thereof, and solves the problems of unstable hydrogen production, slow response of an electrolytic cell, low hydrogen production efficiency, low hydrogen production amount, potential safety hazard and the like of the conventional water electrolysis hydrogen production system.
The invention provides a modularized water electrolysis hydrogen production system, which comprises a renewable energy power generation system and an energy management monitoring system, wherein the renewable energy power generation system comprises a renewable energy power generation device and a rectification inversion device, the energy management monitoring system is in communication connection with the renewable energy power generation system, the modularized water electrolysis hydrogen production system also comprises an electrolysis unit module group and an energy storage system, the electrolysis unit module group comprises a plurality of electrolysis unit modules, each electrolysis unit module comprises a power supply system, an electrolysis bath and an alkali liquor heating system, the alkali liquor heating system heats alkali liquor entering the electrolysis bath, the power supply system is electrically connected with the electrolysis bath, the energy storage system comprises an inversion device and an energy storage battery pack, the power supply system of each electrolysis unit module is respectively and electrically connected with the rectification inversion device, the alkali liquor heating system of each electrolysis unit module is electrically connected with the inversion device of the energy storage system, the rectification inverter of the renewable energy power generation system is electrically connected with the inverter of the energy storage system, and the energy management monitoring system is respectively in communication connection with the electrolysis unit module group and the energy storage system.
Preferably, the electrolysis unit module group still includes alkali case, separation purification system, water charging system, cooling system, alkali case splendid attire alkali lye, and alkali lye gets into alkali lye heating system and heats, separation purification system connects the electrolysis trough, cooling system connects separation purification system, water charging system connects separation purification system.
Preferably, the renewable energy power generation device can adopt one or more of a photovoltaic power generation device, a hydroelectric power generation device and a wind power generation device.
Preferably, the alkali liquor heating system comprises a heating device and an alkali liquor pipeline, wherein the heating device adopts an explosion-proof electric heater, and the explosion-proof electric heater is electrically connected with an inverter of the energy storage system.
The invention also provides a control method of the modular water electrolysis hydrogen production system, which sequentially comprises the following steps:
s1, respectively acquiring the number of the electrolysis unit modules in the production state, the standby state and the shutdown state, and respectively recording the number as NL、NS、NI；
S2, calculating the sum P of the residual loads of the electrolytic cell modules in the production state and the standby state according to the formula (1)total，
Wherein f ismaxFor the upper limit of the optimum interval of the cell load of a certain electrolysis cell module, fnowFor the current load of the cell of the electrolysis cell module, PeThe rated power of the electrolytic cell;
s3, forecasting the power generation increment delta P1 and delta P2 of the renewable energy power generation system in the next time period and the next time period according to a weather forecast system, wherein the delta P1 is the difference value of the power of the next time period and the power of the current time period, and the delta P2 is the difference value of the power of the next time period and the power of the current time period;
s4, when Δ P1 > 0, if Δ P1 < PtotalThen, the standby → production state switching of the electrolysis unit modules is carried out in the next time period, and the number of the switched electrolysis unit modules is calculated according to the principle of optimal efficiency; if Δ P1 > PtotalAnd Δ P2 > PtotalPre-starting the electrolysis unit modules in the shutdown state, namely switching between shutdown and standby states, wherein the number of the switched electrolysis unit modules is calculated according to the optimal operation principle; if Δ P1 > PtotalHowever,. DELTA.P 2 < PtotalAnd the energy storage system absorbs the increment delta P1-P of the power generation amount of the renewable energy system in the next time periodtotalIf the energy storage system is fully loaded, then the renewable energy source is chargedThe system carries out load reduction operation;
s5, when the delta P1 is less than 0, if the delta P2 is less than 0, the electrolysis unit modules in the production and standby states are shut down, namely the production → shutdown and standby → shutdown states are switched, the number of the switched electrolysis unit modules is calculated according to the optimal operation principle, and the standby → shutdown state switching is preferentially carried out; if the delta P2 is more than 0, standby switching is carried out on the electrolysis unit modules in the production state, and the number of the switched units is calculated according to the principle of optimal efficiency;
wherein, the efficiency optimization principle of the steps S4 and S5 means that when the number of the electrolysis unit modules switched between the production state and the standby state is calculated, the workload of each electrolysis unit module in the production state after switching is required to be within the optimal interval; the operation optimization principle refers to that when the number of the electrolysis unit modules switched between the standby state and the shutdown state and the production state and the shutdown state is calculated, the estimated work load of each electrolysis unit module in the production and standby states after switching is required to be within a full interval.
Preferably, the method further comprises an equilibrium distribution principle, wherein the equilibrium distribution principle means that when the rated power of each electrolysis unit module is equal, the working power of each electrolysis unit module in the production state is distributed in an equilibrium manner at any time, namely the working power of each electrolysis unit module in the production state is equal.
Preferably, when the power of the renewable energy power generation system is smaller than the minimum working load of the electrolysis unit module group, the hydrogen production process is stopped, and the energy storage system absorbs the electric energy of the renewable energy power generation system; when the power of the renewable energy system is greater than the maximum load of the electrolysis unit module group, the energy storage system absorbs the power surplus electric energy; when the two conditions occur and the energy storage system reaches full load, the load of the renewable energy system is reduced.
Compared with the prior art, the invention has the beneficial effects that:
the invention breaks through the limitation of small hydrogen production capacity of the single electrolysis unit at present by the combination of a plurality of electrolysis unit modules, and realizes large-scale centralized hydrogen production; meanwhile, the problem of long start-stop time of the electrolytic cell is fully considered, and the quick response capability of the water electrolysis hydrogen production system to the power fluctuation of the renewable energy source is improved by adding the pre-start step of the electrolytic unit module and additionally arranging an alkali liquor heating system in the electrolytic unit module; by additionally arranging an energy storage system, on one hand, electric energy is supplied for the pre-starting process and the shutdown process of the electrolytic cell, and on the other hand, the stability of the system under extreme weather conditions is guaranteed; based on the control method provided by the invention, the efficiency of a hydrogen production system can be effectively improved, the maximum supply of green hydrogen is realized, and meanwhile, the frequent start and stop of an electrolysis unit module are avoided according to the prediction and double judgment of the future generated energy, so that the service life of an electrolysis cell and the safety of electrolysis are improved, and the operation and maintenance cost in the electrolysis process is reduced.
Drawings
FIG. 1 is a functional block diagram of a modular water electrolysis hydrogen production system of the present invention;
FIG. 2 is a schematic block diagram of an electrolysis unit module in the modular water electrolysis hydrogen production system of the present invention;
FIG. 3 is a flow chart of a control method of the modular water electrolysis hydrogen production system of the invention;
FIG. 4 is a schematic diagram of the switching of the working states of the electrolysis unit modules in the modular water electrolysis hydrogen production system.
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.
Examples
Referring to fig. 1 and 2, the modular water electrolysis hydrogen production system provided by this embodiment includes a renewable energy power generation system, an electrolysis unit module set, an energy storage system, and an energy management monitoring system, where the renewable energy power generation system includes a renewable energy power generation device and a rectification inverter device, the electrolysis unit module set includes a plurality of electrolysis unit modules, the electrolysis unit modules are connected in series/parallel or work independently, the electrolysis unit modules include a power supply system, an electrolysis bath, and an alkali liquor heating system, the alkali liquor heating system heats alkali liquor entering the electrolysis bath, the power supply system is electrically connected with the electrolysis bath, the energy storage system includes an inverter device and an energy storage battery pack, the power supply system of each electrolysis unit module is electrically connected with the rectification inverter device, and the alkali liquor heating system of each electrolysis unit module is electrically connected with the inverter device of the energy storage system, the rectification inverter of the renewable energy power generation system is electrically connected with the inverter of the energy storage system, and the energy management monitoring system is respectively in communication connection with the renewable energy power generation system, the electrolysis unit module group and the energy storage system.
As a preferred embodiment of this embodiment, the renewable energy power generation device may adopt one or more combinations of a photovoltaic power generation device, a hydroelectric power generation device, and a wind power generation device. The renewable energy power generation device is responsible for providing electric energy for the whole modular water electrolysis hydrogen production system, and the rectification inverter device is responsible for power conversion. If the renewable energy power generation device is a photovoltaic power generation device, the rectification inverter device can be a combiner box (system output direct current) or a combination of the combiner box and a grid-connected inverter (system output is alternating current); if the renewable energy power generation device is a fan or a hydroelectric generator, the rectification inversion device is a wind power or hydroelectric converter, and unstable wind power and water power are converted into electric energy with the voltage, frequency and phase meeting the requirements through the rectification and inversion principles.
As a preferred embodiment of this embodiment, the inverter of the energy storage system is a bidirectional inverter or consists of two unidirectional inverters, and is responsible for power conversion, and when the energy storage battery pack is charged, the inverter outputs a controllable direct current to charge the energy storage battery pack; the inversion device in the energy storage system is also electrically connected with the alkali liquor heating system in each electrolysis unit module in the electrolysis unit module group, and when a certain electrolysis unit module is pre-started, the inversion device converts the electric energy released by the energy storage battery pack and supplies the electric energy to the alkali liquor heating system of the electrolysis unit module. The energy storage battery pack of the energy storage system comprises more than two battery modules, so that the whole energy storage system can be charged and discharged simultaneously.
As a preferred implementation manner of this embodiment, the electrolysis unit module set further includes an alkali tank, a separation and purification system, a water charging system, and a cooling system, where the alkali tank contains alkali solution, the alkali solution enters the alkali solution heating system to be heated, the separation and purification system is connected to the electrolysis tank, the cooling system is connected to the separation and purification system, and the water charging system is connected to the separation and purification system. The alkali liquor heating system is started to heat alkali liquor when the electrolysis unit module is started in advance, and comprises a heating device and an alkali liquor pipeline, wherein the heating device adopts an explosion-proof electric heater which is electrically connected with an inverter of the energy storage system. The alkali liquor pipeline is connected with the alkali box and the electrolytic bath, and the heating device is fixed inside the alkali liquor pipeline. The power supply system is generally composed of a transformer and a rectifier cabinet and is responsible for converting high-voltage alternating current into controllable direct current (if direct current is input, the transformer is not needed), the electrolytic cell receives electric energy of the power supply system, water electrolysis reaction is carried out to generate hydrogen and oxygen, a large amount of alkali liquor is carried in the generated hydrogen and oxygen, therefore, gas-liquid separation is needed, after separation, the oxygen is emptied, and the hydrogen enters a purification system to be subjected to next dewatering and drying. And after cooling and heat exchange of the separated alkali liquor by a cooling system, conveying the alkali liquor to an electrolytic cell by an alkali liquor conveying pump for alkali liquor circulation, and continuously consuming water in the electrolytic process, so that deionized water is added into the electrolytic system through a water supplementing system. The electrolytic cell of this embodiment selects the alkali water electrolytic cell, and the electrolysis unit module is additionally provided with an alkali liquor heating system, and the pre-starting of the electrolysis unit module is realized by heating the alkali liquor. The electric energy of the alkali liquor heating system and auxiliary equipment required for realizing the pre-starting of the electrolysis unit module is supplied by the energy storage system. During electrolysis, the temperature of the alkali liquor needs to be reduced, so that the alkali liquor heating device is only used for heating when the electrolytic cell is started.
As a preferred embodiment of this embodiment, the electrolysis unit module group, the energy storage system and the renewable energy power generation system are respectively provided with a control subsystem, and the energy management system is in communication with each control subsystem, and is responsible for power distribution among the electrolysis unit modules in the electrolysis unit module group, power distribution among the electrolysis unit module group and the energy storage system, and simultaneously controls the energy storage system to provide electric energy for the pre-start process of each electrolysis unit module.
Referring to fig. 3 and 4, the present embodiment further provides a control method of a modular water electrolysis hydrogen production system, and it should be firstly explained that the control method of the present embodiment complies with the following three control logics:
(1) each electrolysis unit module is provided with two load interval ranges. 1) Full interval: the lower limit of the load of the interval is the minimum working load of the electrolytic cell, the upper limit is the maximum working load of the electrolytic cell, and the interval is determined by the inherent property of the electrolytic cell; 2) the optimal interval is as follows: the upper and lower load limits of the interval are defined by users, the interval range is in a full interval and generally comprises the load point when the system electrolysis efficiency is highest.
(2) The working states of the electrolytic cell are divided into 3 types: production state (L), standby state (S), and shutdown state (I). The switching process between the states is defined as shown in fig. 4.
(3) Four principles of system operation:
1) safety principle. When the power of the renewable energy power generation system is smaller than the minimum working load of the electrolysis unit module group, the hydrogen production process is stopped, and the energy storage system absorbs the electric energy of the renewable energy power generation system; and when the power of the renewable energy power generation system is greater than the maximum load of the electrolysis unit module group, the energy storage system absorbs the residual electric energy. When the two conditions occur and the energy storage system reaches full load, the load of the renewable energy power generation system is reduced. The safety principle is the first principle.
2) And (5) optimizing the efficiency. When calculating the number of electrolytic cell modules switched between the production and standby states, the workload of each electrolytic cell module in the production state after switching is required to be within the optimum interval. When the number of S-L switching is calculated, the calculated value takes the maximum value; when the number of L-S switches is calculated, the calculated value takes the minimum value. The principle is set for ensuring the maximization of the number of the electrolysis unit modules in a production state under a certain condition, improving the hydrogen production efficiency and increasing the green hydrogen yield.
3) And (4) operating an optimal principle. When the number of electrolytic cell modules switched between the standby and shutdown states, and switched between the production and shutdown states is calculated, the estimated workload of each electrolytic cell in the production, standby state after switching is required to be within the full interval. The principle is set for avoiding frequent start-up or shut-down of the electrolytic cell, ensuring the service life of the electrolytic cell and the safety of electrolysis, and reducing the operation and maintenance cost. The calculation results all take the minimum value.
4) And (4) balancing the distribution principle. When the rated powers of the electrolysis unit modules are equal, the working powers of the electrolysis unit modules in the production state are distributed in a balanced manner at any time, namely the working powers of the electrolysis unit modules in the production state are equal.
The control method of the modular water electrolysis hydrogen production system sequentially comprises the following steps:
s1, respectively acquiring the number of the electrolysis unit modules in the production state, the standby state and the shutdown state, and respectively recording the number as NL、NS、NI；
S2, calculating the sum P of the residual loads of the electrolytic cell modules in the production state and the standby state according to the formula (1)total，
Wherein f ismaxFor the upper limit of the optimum interval of the cell load of a certain electrolysis cell module, fnowFor the current load of the cell of the electrolysis cell module, PeThe rated power of the electrolytic cell;
s3, forecasting the power generation increment delta P1 and delta P2 of the renewable energy power generation system in the next time period and the next time period according to a weather forecast system, wherein the delta P1 is the difference value of the power of the next time period and the power of the current time period, and the delta P2 is the difference value of the power of the next time period and the power of the current time period;
s4, when the delta P1 is larger than 0, the generated power of the renewable energy power generation system in the next time period is improved compared with the current generated power according to the prediction result, if the delta P1 is smaller than Ptotal, the residual load sum of the electrolysis unit modules in the production and standby states can meet the increment of the generated power of the renewable energy in the next time period, the electrolysis unit modules are switched between the standby state and the production state in the next time period, and the number of the switched electrolysis unit modules is calculated according to the optimal efficiency principle; if the delta P1 is greater than Ptotal and the delta P2 is greater than Ptotal, the sum of the residual loads of the electrolytic units in the production and standby states at the present stage cannot meet the increment of the power generated by the renewable energy source in two time periods in the future, the electrolytic unit modules in the shutdown state are pre-started, namely shutdown → standby state switching is carried out, and the number of the switched electrolytic unit modules is calculated according to the optimal operation principle; if delta P1 is greater than Ptotal, but delta P2 is less than Ptotal, the power generation power of the renewable energy source is obviously increased only in the next time period, in order to avoid frequent starting of the electrolytic cell, I → S switching is not carried out, the increment of the power generation amount of the renewable energy source system in the next time period is absorbed by the energy storage system, and if the load of the energy storage system is full, the load reduction operation is carried out on the renewable energy source system;
s5, when the delta P1 is less than 0, the power generation power of the renewable energy source system in the next time period is reduced to some extent compared with the current power generation power according to the prediction result. If the delta P2 is less than 0, indicating that the generated power of the renewable energy system is reduced in the next two time periods, performing shutdown operation on the electrolysis unit modules in the production and standby states, namely performing production → shutdown, standby → shutdown state switching, wherein the number of the switched electrolysis unit modules is calculated according to the optimal operation principle, and the standby → shutdown state switching is preferentially performed; if the delta P2 is more than 0, the power generation power of the renewable energy source is only temporarily reduced in the next time period, in order to avoid frequent halt of the electrolytic cell, the standby switching is carried out on the electrolytic cell modules only in the production state, and the number of the switched cells is calculated according to the principle of optimal efficiency.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (7)
1. The utility model provides a modularization water electrolysis hydrogen manufacturing system, includes renewable energy power generation system, energy management monitored control system, renewable energy power generation system includes renewable energy power generation facility and rectification inverter, energy management monitored control system and renewable energy power generation system communication connection, its characterized in that: still include electrolysis unit module group, energy storage system, electrolysis unit module group includes a plurality of electrolysis unit modules, electrolysis unit module includes electrical power generating system, electrolysis trough, alkali lye heating system heats the alkali lye that gets into the electrolysis trough, electrical power generating system is connected with the electrolysis trough electricity, energy storage system includes inverter and energy storage battery group, the electrical power generating system of every electrolysis unit module is connected with rectification inverter electricity respectively, the alkali lye heating system of every electrolysis unit module is connected with energy storage system's inverter electricity, renewable energy power generation system's rectification inverter is connected with energy storage system's inverter electricity, energy management monitored control system is connected with electrolysis unit module group, energy storage system communication respectively.
2. The modular water electrolysis hydrogen production system according to claim 1, wherein: the electrolysis unit module group still includes alkali case, separation and purification system, water charging system, cooling system, alkali case splendid attire alkali lye, and alkali lye gets into alkali lye heating system and heats, separation and purification system connects the electrolysis trough, cooling system connects separation and purification system, water charging system connects separation and purification system.
3. The modular water electrolysis hydrogen production system according to claim 1, wherein: the renewable energy power generation device can adopt one or more combinations of a photovoltaic power generation device, a hydroelectric power generation device and a wind power generation device.
4. The modular water electrolysis hydrogen production system according to claim 1, wherein: the alkali liquor heating system comprises a heating device and an alkali liquor pipeline, wherein the heating device adopts an explosion-proof electric heater, and the explosion-proof electric heater is electrically connected with an inverter of the energy storage system.
5. A control method of a modular water electrolysis hydrogen production system is characterized by comprising the following steps: the method comprises the following steps in sequence:
s1, respectively acquiring the number of the electrolysis unit modules in the production state, the standby state and the shutdown state, and respectively recording the number as Nl、Ns、Ni；
S2, calculating the sum P of the residual loads of the electrolytic cell modules in the production state and the standby state according to the formula (1)total，
Wherein f ismaxFor the upper limit of the optimum interval of the cell load of a certain electrolysis cell module, fnowFor the current load of the cell of the electrolysis cell module, PeThe rated power of the electrolytic cell;
s3, forecasting the power generation increment delta P1 and delta P2 of the renewable energy power generation system in the next time period and the next time period according to a weather forecast system, wherein the delta P1 is the difference value of the power of the next time period and the power of the current time period, and the delta P2 is the difference value of the power of the next time period and the power of the current time period;
s4, when Δ P1 > 0, if Δ P1 < PtotalThen, the standby → production state switching of the electrolysis unit modules is carried out in the next time period, and the number of the switched electrolysis unit modules is calculated according to the principle of optimal efficiency; if Δ P1 > PtotalAnd Δ P2 > PtotalPre-starting the electrolysis unit modules in the shutdown state, namely switching between shutdown and standby states, wherein the number of the switched electrolysis unit modules is calculated according to the optimal operation principle; if it isΔP1＞PtotalHowever,. DELTA.P 2 < PtotalAnd the energy storage system absorbs the increment delta P1-P of the power generation amount of the renewable energy system in the next time periodtotalIf the load of the energy storage system is full, the load reduction operation is carried out on the renewable energy system;
s5, when the delta P1 is less than 0, if the delta P2 is less than 0, the electrolysis unit modules in the production and standby states are shut down, namely the production → shutdown and standby → shutdown states are switched, the number of the switched electrolysis unit modules is calculated according to the optimal operation principle, and the standby → shutdown state switching is preferentially carried out; if the delta P2 is more than 0, standby switching is carried out on the electrolysis unit modules in the production state, and the number of the switched units is calculated according to the principle of optimal efficiency;
wherein, the efficiency optimization principle of the steps S4 and S5 means that when the number of the electrolysis unit modules switched between the production state and the standby state is calculated, the workload of each electrolysis unit module in the production state after switching is required to be within the optimal interval; the operation optimization principle refers to that when the number of the electrolysis unit modules switched between the standby state and the shutdown state and the production state and the shutdown state is calculated, the estimated work load of each electrolysis unit module in the production and standby states after switching is required to be within a full interval.
6. The method of controlling a modular water electrolysis hydrogen production system according to claim 5, wherein: the method further comprises an equilibrium distribution principle, wherein the equilibrium distribution principle means that when the rated power of each electrolysis unit module is equal, the working power of each electrolysis unit module in the production state is distributed in an equilibrium manner at any moment, namely the working power of each electrolysis unit module in the production state is equal.
7. The method of controlling a modular water electrolysis hydrogen production system according to claim 5, wherein: when the power of the renewable energy power generation system is smaller than the minimum working load of the electrolysis unit module group, the hydrogen production process is stopped, and the energy storage system absorbs the electric energy of the renewable energy power generation system; when the power of the renewable energy system is greater than the maximum load of the electrolysis unit module group, the energy storage system absorbs the power surplus electric energy; when the two conditions occur and the energy storage system reaches full load, the load of the renewable energy system is reduced.
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114752950A (en) * | 2022-05-16 | 2022-07-15 | 中国标准化研究院 | Wave type power input hydrogen production method and device by electrolyzing water |
| CN114836790A (en) * | 2022-06-17 | 2022-08-02 | 水木明拓氢能源科技有限公司 | Control method, control system and computer readable medium for water electrolysis hydrogen production device |
| CN114908365A (en) * | 2022-04-26 | 2022-08-16 | 上海卓微氢科技有限公司 | Control method of off-grid photovoltaic hydrogen production system |
| CN114934281A (en) * | 2022-05-31 | 2022-08-23 | 同济大学 | Hybrid hydrogen production system coupled with electrochemical power supply and control method thereof |
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2021
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114908365A (en) * | 2022-04-26 | 2022-08-16 | 上海卓微氢科技有限公司 | Control method of off-grid photovoltaic hydrogen production system |
| CN114908365B (en) * | 2022-04-26 | 2024-04-30 | 上海卓微氢科技有限公司 | Off-grid photovoltaic hydrogen production system control method |
| CN114752950A (en) * | 2022-05-16 | 2022-07-15 | 中国标准化研究院 | Wave type power input hydrogen production method and device by electrolyzing water |
| CN114934281A (en) * | 2022-05-31 | 2022-08-23 | 同济大学 | Hybrid hydrogen production system coupled with electrochemical power supply and control method thereof |
| CN114836790A (en) * | 2022-06-17 | 2022-08-02 | 水木明拓氢能源科技有限公司 | Control method, control system and computer readable medium for water electrolysis hydrogen production device |
| CN114836790B (en) * | 2022-06-17 | 2024-07-02 | 水木明拓氢能源科技有限公司 | Control method, control system and computer readable medium for water electrolysis hydrogen plant |
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