CN116288452B - Multi-mode self-optimizing electrolytic hydrogen production circuit and control method - Google Patents
Multi-mode self-optimizing electrolytic hydrogen production circuit and control method Download PDFInfo
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- CN116288452B CN116288452B CN202310526413.2A CN202310526413A CN116288452B CN 116288452 B CN116288452 B CN 116288452B CN 202310526413 A CN202310526413 A CN 202310526413A CN 116288452 B CN116288452 B CN 116288452B
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- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 title claims abstract description 109
- 229910052739 hydrogen Inorganic materials 0.000 title claims abstract description 109
- 239000001257 hydrogen Substances 0.000 title claims abstract description 109
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 103
- 238000000034 method Methods 0.000 title claims abstract description 28
- 238000005868 electrolysis reaction Methods 0.000 claims abstract description 11
- 238000011084 recovery Methods 0.000 claims description 18
- 238000005070 sampling Methods 0.000 claims description 14
- 230000001276 controlling effect Effects 0.000 claims description 8
- 230000008569 process Effects 0.000 claims description 7
- 230000001105 regulatory effect Effects 0.000 claims description 7
- 230000008859 change Effects 0.000 claims description 6
- 238000005516 engineering process Methods 0.000 abstract description 3
- 230000004044 response Effects 0.000 abstract description 2
- 229910052799 carbon Inorganic materials 0.000 description 6
- 238000010586 diagram Methods 0.000 description 5
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 4
- 239000007788 liquid Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 238000004364 calculation method Methods 0.000 description 3
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000006386 neutralization reaction Methods 0.000 description 2
- 230000009466 transformation Effects 0.000 description 2
- 239000003513 alkali Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 238000002485 combustion reaction Methods 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 239000002803 fossil fuel Substances 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- 239000008213 purified water Substances 0.000 description 1
- 230000035484 reaction time Effects 0.000 description 1
- 238000011897 real-time detection Methods 0.000 description 1
- 238000006467 substitution reaction Methods 0.000 description 1
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/60—Constructional parts of cells
- C25B9/65—Means for supplying current; Electrode connections; Electric inter-cell connections
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B15/00—Operating or servicing cells
- C25B15/02—Process control or regulation
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Chemical Kinetics & Catalysis (AREA)
- Electrochemistry (AREA)
- Materials Engineering (AREA)
- Metallurgy (AREA)
- Organic Chemistry (AREA)
- Automation & Control Theory (AREA)
- Inorganic Chemistry (AREA)
- Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
Abstract
The invention discloses a multi-mode self-optimizing electrolytic hydrogen production circuit and a control method. The circuit topology and the control mode adopted by the invention can reduce the number of required inductance and capacitance on the premise of not changing the quality of output current, and meanwhile, compared with the traditional direct current electrolysis hydrogen production, the invention can efficiently electrolyze hydrogen production under different working conditions on the premise of keeping the optimal electrolysis efficiency, solves the problems of slow response and low purity of the electrolysis hydrogen production under the renewable energy fluctuation condition, and expands the application range of the alkaline electrolysis hydrogen production technology.
Description
Technical Field
The invention relates to a multimode self-optimizing electrolytic hydrogen production circuit and application thereof in electrolytic hydrogen production, belonging to the operation control technology of a hydrogen electric coupling system in the field of new energy.
Background
The development of new energy sources such as photovoltaic, wind power, hydrogen energy and the like is an important measure in the national 'double carbon' strategy, the development and utilization of non-fossil energy sources are main ways for pushing large-scale substitution of fossil fuels, green transformation of energy sources and realization of carbon neutralization, and high-proportion and high-density renewable energy intervention is a basic form of a future power grid. The hydrogen energy is an ideal clean secondary energy, is taken from water, becomes purified water without any pollution after combustion, has rich hydrogen energy sources and low carbon, and has important significance in constructing a clean low-carbon safe and efficient energy system and realizing the carbon-peak carbon neutralization target. The clear hydrogen energy is the key direction of strategically emerging industries, and is a new growth point for constructing a green low-carbon industrial system and creating industrial transformation and upgrading.
However, renewable energy electrolytic hydrogen production faces a number of problems. The renewable energy source has the characteristics of intermittence, volatility and randomness, but under the low-load working condition of the alkaline liquid electrolytic hydrogen production, the purity of hydrogen production gas and the hydrogen production efficiency are lower, so that the working range is narrow, the wide-range power fluctuation cannot be adapted, the renewable energy source is difficult to effectively support the friendly grid connection of the renewable energy source, and the future development of the alkaline liquid electrolytic water hydrogen production is severely restricted.
Disclosure of Invention
Aiming at the defects of the prior art, the invention provides a multi-mode self-optimizing electrolytic hydrogen production circuit and a control method, which solve the problem of nonuniform reaction of an electrolytic cell under a low-load working condition, effectively improve the purity of hydrogen production under the low-load working condition, improve the hydrogen production efficiency and enable the alkaline liquid electrolytic water hydrogen production to operate efficiently under the condition of wide-range power fluctuation.
In order to achieve the above purpose, the technical scheme adopted by the invention is as follows:
a multi-mode self-optimizing electrolytic hydrogen production circuit comprises a direct current/direct current circuit and a pulse width modulation circuit;
the input side of the direct current/direct current circuit is connected with a direct current power supply, and the output side of the direct current/direct current circuit is connected with the input side of the pulse width modulation circuit; the direct current/direct current circuit is used for supplying the direct current output by the direct current power supply to the pulse width modulation circuit after the current of the direct current is increased;
the output side of the pulse width modulation circuit is connected with the hydrogen production electrolytic tank, and the pulse width modulation circuit is used for converting the direct current output by the direct current/direct current circuit into pulse current and providing the pulse current for the hydrogen production electrolytic tank;
the pulse width modulation circuit includes: the full-control type switching tube S, the inductance L, the first fast recovery diode D1 and the second fast recovery diode D2, wherein the cathode of the first fast recovery diode D1 is connected with the anode of the front-stage direct current/direct current circuit and the first end of the inductance L, and the anode of the first fast recovery diode D1 is connected with the cathode of the front-stage direct current/direct current circuit and the emitter of the full-control type switching tube S; the second end of the inductor L is connected with the positive electrode of the second fast recovery diode D2 and the collector electrode of the full-control switching tube S; the cathode of the second fast recovery diode D2 is connected with the anode of the post-stage hydrogen production electrolytic tank, and the emitter of the full-control switching tube S is connected with the cathode of the post-stage hydrogen production electrolytic tank.
According to the multi-mode self-optimizing electrolytic hydrogen production circuit, the pulse width modulation circuit is utilized to convert the current of the direct current power supply into the pulse current, and then the direct current/direct current circuit is utilized to adjust the output of the direct current/direct current circuit in real time to ensure that the high level in the pulse current meets the rated working condition of electrolytic hydrogen production, so that the hydrogen production electrolytic tank works under the rated working condition during the high level and stops working during the low level, the electrolytic tank always works under the complete electrolytic state, and the aim of reducing the average power is fulfilled on the premise of keeping the optimal hydrogen production purity and hydrogen production efficiency, so that the hydrogen production electrolytic tank can still operate under the low-load working condition with high efficiency.
Further, the direct current/direct current circuit is any one of a Buck Buck converter, a phase-shifting full-bridge converter and a double-active-bridge converter.
A control method of the circuit comprises the following steps:
controlling and regulating the output of the DC/DC circuit to make the current I on the inductance L of the pulse width modulation circuit L Equal to rated current I of hydrogen production electrolytic tank under direct current working condition E ；
The output power of the direct current power supply and the average power of the hydrogen production electrolytic tank are obtained in real time, the duty ratio d of the PWM control signal of the full-control switch tube S in the pulse width modulation circuit is controlled and regulated so as to change the average power of the hydrogen production electrolytic tank connected with the output side of the pulse width modulation circuit, and finally the average power P of the hydrogen production electrolytic tank is obtained aver Equal to the output power of the dc power supply.
Further, the period T of the PWM control signal of the fully controlled switching transistor S s Is a range of values of (a)Is [0.01s,1s ]]。
Further, the average power of the hydrogen production electrolytic tank is obtained by the following method:
instant electrolyzer voltage U of real-time acquisition hydrogen production electrolyzer ele Instantaneous cell current I ele Then the average power P of the hydrogen production electrolytic tank is obtained by calculation according to the following formula aver ：
Wherein, T is the sampling interval time, and T is the total time of the sampling process.
Further, the sampling interval time T is 100 μs.
Further, the total time T of the sampling process takes the switching period T s An integer multiple of the value.
Further, a PI controller is used to control and adjust the duty ratio d of the PWM control signal of the fully-controlled switching tube S in the PWM circuit, and the specific control law is as follows:
wherein the method comprises the steps ofIs a PI controller, s is a Laplacian operator, and k p Is a proportionality coefficient, k i Is an integral coefficient; p (P) ref The reference power is the output power of a direct current power supply collected in real time, P aver The average power of the hydrogen production electrolytic tank is obtained.
Based on the circuit and the control method thereof, the invention also provides an electrolytic hydrogen production method, which specifically comprises the following steps:
connecting the input side of the circuit to a direct current power supply, and connecting the output side of the circuit to a hydrogen production electrolytic tank;
starting a direct-current power supply, acquiring the output power of the direct-current power supply and the average power of the hydrogen production electrolytic tank in real time, and controlling and adjusting PWM control signals of a full-control switch tube S in a pulse width modulation circuitTo change the average power of the hydrogen production electrolytic tank connected to the output side of the pulse width modulation circuit, and finally to make the average power P of the hydrogen production electrolytic tank aver Equal to the output power of the DC power supply; simultaneously controlling and adjusting the output of the DC/DC circuit to enable the current I on the inductance L of the pulse width modulation circuit L Equal to rated current I of hydrogen production electrolytic tank under direct current working condition E 。
The beneficial effects of the invention are as follows: the invention designs a multi-mode self-optimizing electrolytic hydrogen production circuit, and the traditional alkali liquid hydrogen production circuit generally adopts a Buck converter, however, the converter has poor hydrogen production purity and low hydrogen production efficiency under the wide-range fluctuation working condition. The circuit topology and the control mode adopted by the invention can reduce the number of required inductance and capacitance on the premise of not changing the quality of output current, and meanwhile, compared with the traditional direct current electrolysis hydrogen production, the invention can efficiently electrolyze hydrogen production under different working conditions on the premise of keeping the optimal electrolysis efficiency, solves the problems of slow response and low purity of the electrolysis hydrogen production under the renewable energy fluctuation condition, and expands the application range of the alkaline electrolysis hydrogen production technology.
Drawings
FIG. 1 is a schematic diagram of a multi-mode self-optimizing electrolytic hydrogen production circuit provided in an embodiment of the present application;
FIG. 2 is a voltage-current waveform diagram of a hydrogen production electrolyzer connected to the output side of a circuit provided in an embodiment of the present application;
fig. 3 is a waveform diagram of average power of a hydrogen production electrolytic cell and output power of a direct current power supply connected to an output side of a circuit according to an embodiment of the present application.
Detailed Description
The following description of the embodiments of the present invention will be made more apparent and fully hereinafter with reference to the accompanying drawings, in which some, but not all embodiments of the invention are shown. The following description of at least one exemplary embodiment is merely exemplary in nature and is in no way intended to limit the invention, its application, or uses. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
For a thorough understanding of the present invention, detailed structures and steps are set forth in the following description, and further detailed description of embodiments of the present application is provided in connection with the accompanying drawings and detailed description, so as to illustrate the technical solutions set forth herein.
The invention relates to a multi-mode self-optimizing electrolytic hydrogen production circuit, which comprises a direct current/direct current circuit and a pulse width modulation circuit. The input side of the direct current/direct current circuit is connected with a direct current power supply, the output side of the direct current/direct current circuit is connected with the input side of the pulse width modulation circuit, the direct current output by the direct current power supply is supplied to the pulse width modulation circuit after being increased, the output side of the pulse width modulation circuit is connected with a hydrogen production electrolytic tank, the direct current output by the direct current/direct current circuit is converted into pulse current, the pulse current is supplied to the hydrogen production electrolytic tank, and specifically, the structure of the circuit is shown in figure 1, and the pulse width modulation circuit comprises: the full-control type switching tube S, the inductance L, the first fast recovery diode D1 and the second fast recovery diode D2, wherein the cathode of the first fast recovery diode D1 is connected with the anode of the front-stage direct current/direct current circuit and the first end of the inductance L, and the anode of the first fast recovery diode D1 is connected with the cathode of the front-stage direct current/direct current circuit and the emitter of the full-control type switching tube S; the second end of the inductor L is connected with the positive electrode of the second fast recovery diode D2 and the collector electrode of the full-control switching tube S; the cathode of the second fast recovery diode D2 is connected with the anode of the post-stage hydrogen production electrolytic tank, the emitter of the full control switch tube S is connected with the cathode of the post-stage hydrogen production electrolytic tank, and the grid electrode of the full control switch tube S is connected with a control signal.
The direct current/direct current circuit is any one of a Buck Buck converter, a phase-shifting full-bridge converter and a double-active-bridge converter. The output power of the direct current/direct current circuit can be adjusted by controlling the full-control switch tube in the converter.
The core idea of the circuit and the control method thereof is that the hydrogen production electrolytic tank works under the rated working condition during the high level and stops working during the low level, so that the electrolytic tank always works in the complete electrolysis state, thereby achieving the purpose of reducing the average power on the premise of keeping the optimal hydrogen production purity and hydrogen production efficiency, and the hydrogen production electrolytic tank can still operate under the low-load working condition with high efficiency. Specifically, the control method includes control of a direct current/direct current circuit and control of a pulse width modulation circuit, wherein:
the control process of the direct current/direct current circuit is as follows: the output of the DC/DC circuit is regulated by the controller to make the current I on the inductance L of the pulse width modulation circuit L Equal to rated current I of hydrogen production electrolytic tank under direct current working condition E 。
The control process of the pulse width modulation circuit is as follows: the average power P of the hydrogen production electrolytic tank obtained by real-time detection is carried out on the average power of the hydrogen production electrolytic tank and the output power of the direct current power supply aver With reference power P ref Comparing, thereby adjusting the duty ratio d of the PWM control signal of the full-control switch tube S in the pulse width modulation circuit to change the average power of the hydrogen production electrolytic cell connected with the output side of the pulse width modulation circuit, and finally leading the average power P of the hydrogen production electrolytic cell to be aver Equal to reference power P ref I.e. the output power of the dc power supply. The PI controller is adopted for control, and the concrete control law is as follows:
wherein the method comprises the steps ofIs a PI controller, s is a Laplacian operator, and k p Is a proportionality coefficient, k i Is an integral coefficient; p (P) ref For reference power, P aver The average power of the hydrogen production electrolytic tank is obtained.
Wherein, the period T of PWM control signal of the full control switch tube S s Preferably in the range of [0.01s,1s ]]The shortest reaction time of the electrochemical reaction is satisfied in the interval, and the power fluctuation amplitude of the front-stage power supply can be minimized.
As a preferred embodimentUsing a voltage sensor and a current sensor to control the instantaneous cell voltage U of the cell connected to the output side of the pulse width modulation circuit ele Instantaneous cell current I ele And (5) sampling calculation is carried out so as to complete the real-time acquisition of the average power of the hydrogen production electrolytic tank, wherein the sampling interval time T is 100 mu s. The total sampling process time required for calculating the average power is T, and the T is the switching period T s The value of integer multiple, i.e
t = n∙T s , n = 1,2,3…
Average power P of hydrogen production electrolytic cell aver The calculation formula of (2) is as follows:
wherein U is ele For instantaneous cell voltage, I ele The instantaneous cell current is T is the sampling interval time, and T is the total sampling process time. Obtaining the average power P of the hydrogen production electrolytic tank within the sampling total time t aver 。
The voltage and current waveform diagram of the hydrogen production electrolytic tank based on the control method is shown in figure 2, and the invention can accurately control the voltage and current in the high level period so as to meet the rated working condition of the hydrogen production electrolytic tank.
Corresponding to the embodiment of the multi-mode self-optimizing electrolytic hydrogen production circuit and the control method, the invention also provides an embodiment of the electrolytic hydrogen production method.
The invention relates to an electrolytic hydrogen production method, which specifically comprises the following steps:
connecting the input side of the circuit to a direct current power supply, and connecting the output side of the circuit to a hydrogen production electrolytic tank;
starting a direct current power supply, acquiring the output power of the direct current power supply and the average power of the hydrogen production electrolytic tank in real time, controlling and adjusting the duty ratio d of PWM control signals of a fully-controlled switching tube S in a pulse width modulation circuit to change the average power of the hydrogen production electrolytic tank connected to the output side of the pulse width modulation circuit, and finally enabling the average power P of the hydrogen production electrolytic tank to be the average power P aver Equal to the output power of the DC power supply; at the same timeControlling and regulating the output of the DC/DC circuit to make the current I on the inductance L of the pulse width modulation circuit L Equal to rated current I of hydrogen production electrolytic tank under direct current working condition E 。
FIG. 3 is a waveform diagram showing the average power of the electrolytic cell and the output power of the DC power supply connected to the output side of the circuit according to the embodiment of the present invention, wherein the average power P of the electrolytic cell is obtained aver Equal to reference power P ref Therefore, the electrolytic tank always works in a complete electrolysis state, and the aim of reducing average power is fulfilled on the premise of keeping the optimal hydrogen production purity and hydrogen production efficiency, so that the hydrogen production electrolytic tank can still operate efficiently under a low-load working condition.
It is apparent that the above examples are given by way of illustration only and are not limiting of the embodiments. Other variations or modifications of the above teachings will be apparent to those of ordinary skill in the art. It is not necessary or exhaustive of all embodiments. And obvious variations or modifications thereof are contemplated as falling within the scope of the present invention.
Claims (9)
1. A multi-mode self-optimizing electrolytic hydrogen production circuit is characterized by comprising a direct current/direct current circuit and a pulse width modulation circuit;
the input side of the direct current/direct current circuit is connected with a direct current power supply, and the output side of the direct current/direct current circuit is connected with the input side of the pulse width modulation circuit; the direct current/direct current circuit is used for supplying the direct current output by the direct current power supply to the pulse width modulation circuit after the current of the direct current is increased;
the output side of the pulse width modulation circuit is connected with the hydrogen production electrolytic tank, and the pulse width modulation circuit is used for converting the direct current output by the direct current/direct current circuit into pulse current and providing the pulse current for the hydrogen production electrolytic tank;
the pulse width modulation circuit includes: the full-control type switching tube S, the inductance L, the first fast recovery diode D1 and the second fast recovery diode D2, wherein the cathode of the first fast recovery diode D1 is connected with the anode of the front-stage direct current/direct current circuit and the first end of the inductance L, and the anode of the first fast recovery diode D1 is connected with the cathode of the front-stage direct current/direct current circuit and the emitter of the full-control type switching tube S; the second end of the inductor L is connected with the positive electrode of the second fast recovery diode D2 and the collector electrode of the full-control switching tube S; the cathode of the second fast recovery diode D2 is connected with the anode of the post-stage hydrogen production electrolytic tank, and the emitter of the full-control switching tube S is connected with the cathode of the post-stage hydrogen production electrolytic tank.
2. The circuit of claim 1, wherein the dc/dc circuit is any one of a Buck converter, a phase-shifted full-bridge converter, and a dual-active bridge converter.
3. A method of controlling a circuit according to any one of claims 1-2, comprising:
controlling and regulating the output of the DC/DC circuit to make the current I on the inductance L of the pulse width modulation circuit L Equal to rated current I of hydrogen production electrolytic tank under direct current working condition E ；
The output power of the direct current power supply and the average power of the hydrogen production electrolytic tank are obtained in real time, the duty ratio d of the PWM control signal of the full-control switch tube S in the pulse width modulation circuit is controlled and regulated so as to change the average power of the hydrogen production electrolytic tank connected with the output side of the pulse width modulation circuit, and finally the average power P of the hydrogen production electrolytic tank is obtained aver Equal to the output power of the dc power supply.
4. A control method according to claim 3, characterized in that the period T of the PWM control signal of the fully controlled switching tube S s The range of the value of (C) is [0.01s,1s ]]。
5. A control method according to claim 3, wherein the average power of the hydrogen production electrolyzer is obtained by:
instant electrolyzer voltage U of real-time acquisition hydrogen production electrolyzer ele Instantaneous cell current I ele Then calculate according to the following formulaObtaining the average power P of the hydrogen production electrolytic tank aver ：
；
Wherein, T is the sampling interval time, and T is the total time of the sampling process.
6. The control method according to claim 5, wherein the sampling interval time T is 100 μs.
7. The control method according to claim 5, wherein the total sampling time T is the switching period T s An integer multiple of the value.
8. The control method according to claim 5, wherein the duty ratio d of the PWM control signal of the fully-controlled switching transistor S in the PWM circuit is controlled and adjusted by a PI controller, and the specific control law is as follows:
；
wherein the method comprises the steps ofIs a PI controller, s is a Laplacian operator, and k p Is a proportionality coefficient, k i Is an integral coefficient; p (P) ref The reference power is the output power of a direct current power supply collected in real time, P aver The average power of the hydrogen production electrolytic tank is obtained.
9. A method of producing hydrogen by electrolysis based on the circuit according to any one of claims 1 to 2, characterized in that it comprises in particular:
connecting the input side of the circuit of any one of claims 1-2 to a direct current power supply and the output side to a hydrogen production electrolyzer;
starting a direct-current power supply, and acquiring output power of the direct-current power supply and flatness of the hydrogen production electrolytic tank in real timeThe average power is controlled and regulated to adjust the duty ratio d of PWM control signals of a full-control switching tube S in a pulse width modulation circuit so as to change the average power of a hydrogen production electrolytic cell connected to the output side of the pulse width modulation circuit, and finally the average power P of the hydrogen production electrolytic cell is realized aver Equal to the output power of the DC power supply; simultaneously controlling and adjusting the output of the DC/DC circuit to enable the current I on the inductance L of the pulse width modulation circuit L Equal to rated current I of hydrogen production electrolytic tank under direct current working condition E 。
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| US8709221B1 (en) * | 2010-02-24 | 2014-04-29 | Andrew L. Smith | Current regulator for mobile water electrolyzer |
| WO2017026702A1 (en) * | 2015-08-11 | 2017-02-16 | 주식회사 다음에너지 | Power control device for electrolyzing water and method for controlling same |
| CN209948954U (en) * | 2019-06-04 | 2020-01-14 | 苏州汇川联合动力系统有限公司 | Non-isolated type double-switch voltage reduction circuit and direct current-direct current converter |
| CN212983068U (en) * | 2020-07-13 | 2021-04-16 | 深圳市珐彩科技有限公司 | Control circuit of hydrogen generation device and hydrogen generation device |
| CN112968605A (en) * | 2021-02-20 | 2021-06-15 | 河北建投新能源有限公司 | Hydrogen production power supply with double staggered BUCK topology and control method thereof |
| CN113381623A (en) * | 2021-07-05 | 2021-09-10 | 阳光电源股份有限公司 | Hydrogen production power supply system, hydrogen production device and hydrogen production method |
| CN113328639A (en) * | 2021-07-09 | 2021-08-31 | 四川大学 | High-power electrolytic hydrogen production rectification power supply and control method |
| CN114481215A (en) * | 2022-01-10 | 2022-05-13 | 清华大学 | Electrolytic hydrogen production device and control method thereof |
| CN115094482A (en) * | 2022-07-05 | 2022-09-23 | 浙江大学 | Alkali liquor electrolysis hydrogen production control method adapting to wide power fluctuation |
| CN116024608A (en) * | 2022-11-24 | 2023-04-28 | 广东卡沃罗氢科技有限公司 | Control circuit based on hydrogen generator and hydrogen production device |
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