Hydrogen production device and control method thereof

Abstract

The invention provides a hydrogen production device and a control method thereof. The hydrogen production device comprises a hydrogen production power supply and an energy management system, the hydrogen production power supply comprises an alternating current connecting end, an electrolytic cell connecting end and at least one direct current power supply end, the alternating current connecting end is connected with the power grid, the electrolytic cell connecting end is connected with the electrolytic cell, and the direct current power supply end is connected with the new energy assembly; the energy management system is used for controlling the hydrogen production power supply so that the new energy assembly and / or the power grid can supply power to the electrolytic cell. According to the hydrogen production device and the control method thereof, the hydrogen production power supply is controlled through the energy management system, so that the new energy assembly and / or the power grid supplies power to the electrolytic cell; according to the system, external new energy assemblies can be conveniently connected and integrated, the communication speed and the dynamic response capability of the system are improved, the smoothness and continuity of hydrogen production are effectively adjusted, and the cost of the whole power supply system is lower.

Description

Technical Field

[0001] The present application relates to the technical field of hydrogen production, and in particular to a hydrogen production device and a control method thereof. Background Art

[0002] Developing new energy, reducing the consumption of oil and coal, and vigorously developing hydrogen energy other than wind power and photovoltaics have also become a major demand area, and the hydrogen production has been growing steadily in recent years. Hydrogen production by electrolyzing water is favored for its environmental protection and large reserves.

[0003] Hydrogen production by electrolyzing water is called green hydrogen, which has a higher cost compared with gray hydrogen produced by traditional production methods. The electricity price is a key influencing factor for hydrogen production by electrolyzing water. Therefore, hydrogen production by electrolyzing water is more inclined to use peak-shaving low-price electricity or new energy power to reduce the production cost of hydrogen production by electrolyzing water. Considering from the perspective of electrolysis equipment, the operating cost and efficiency of repeatedly starting and stopping the equipment are relatively low, and it is expected that the electrolytic hydrogen production is in a long-term continuous operation state.

[0004] The current new energy hydrogen production solutions mainly include two major solutions: AC coupling hydrogen production and DC coupling hydrogen production. Through the system cooperation of wind power, photovoltaics, and energy storage, long-term continuous and efficient operation of electrolyzing water is achieved. Whether it is the AC coupling hydrogen production solution or the DC coupling hydrogen production solution, the supporting equipment of the system is relatively numerous, the cost of the power supply system is high, and the overall efficiency is not high; multiple system equipment coordination requires the configuration of an EMS system, but different power supply equipment may come from different manufacturers, which brings certain difficulties to system integration and coordinated commissioning. Summary of the Invention

[0005] The present application provides a hydrogen production device and a control method thereof to facilitate the access and integration of external new energy components.

[0006] On the one hand, the present application provides a hydrogen production device, which includes a hydrogen production power supply and an energy management system;

[0007] The hydrogen production power supply includes an AC connection end, an electrolyzer connection end, and at least one DC power supply end. The AC connection end is connected to the power grid, the electrolyzer connection end is connected to the electrolyzer, and the DC power supply end is connected to the new energy component;

[0008] The energy management system is used to control the hydrogen production power supply so that the new energy component and / or the power grid supplies power to the electrolyzer.

[0009] On the other hand, the present application provides a control method for a hydrogen production device, and the hydrogen production device includes a hydrogen production power supply and an energy management system;

[0010] The hydrogen production power supply includes an AC connection end, an electrolyzer connection end, and at least one DC power supply end. The AC connection end is connected to the power grid, the electrolyzer connection end is connected to the electrolyzer, and the DC power supply end is connected to the new energy component;

[0011] The control method is applied to an energy management system, and the control method includes:

[0012] Controlling the hydrogen production power supply so that a new energy component and / or the power grid supplies power to the electrolyzer.

[0013] The hydrogen production device and its control method provided by this application control the hydrogen production power supply through an energy management system so that a new energy component and / or the power grid supplies power to the electrolyzer; it is convenient for external new energy components to be integrated, and it also improves the system communication speed and dynamic response ability, effectively adjusting the smoothness and continuity of hydrogen production, and the cost of the overall power supply system is lower. Description of the Drawings

[0014] One or more embodiments are exemplarily illustrated by pictures in the corresponding drawings. These exemplary illustrations do not limit the embodiments. Elements with the same reference numerals in the drawings represent similar elements. Unless otherwise stated, the drawings in the drawings do not constitute a proportional limitation.

[0015] Figure 1 It is a schematic diagram of the hydrogen production device provided by the embodiment of this application;

[0016] Figure 2 It is a specific circuit schematic diagram of the hydrogen production device provided by the embodiment of this application.

[0017] Figure 3 It is a specific implementation schematic diagram of the hydrogen production device provided by the embodiment of this application;

[0018] Figure 4 It is a schematic diagram of a control process of the hydrogen production device provided by the embodiment of this application;

[0019] Figure 5 It is another specific implementation schematic diagram of the hydrogen production device provided by the embodiment of this application;

[0020] Figure 6 It is another schematic diagram of a control process of the hydrogen production device provided by the embodiment of this application;

[0021] Figure 7 It is yet another specific implementation schematic diagram of the hydrogen production device provided by the embodiment of this application;

[0022] Figure 8 It is yet another schematic diagram of a control process of the hydrogen production device provided by the embodiment of this application;

[0023] Figure 9 It is a schematic diagram of the control method of the hydrogen production device provided by the embodiment of this application. Detailed Embodiments

[0024] For ease of understanding of this application, the following provides a more detailed description of this application in conjunction with the accompanying drawings and specific embodiments. Unless otherwise defined, all technical and scientific terms used in this specification have the same meaning as commonly understood by those skilled in the technical field to which this application belongs. The terms used in this specification in the description of this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The term "and / or" used in this specification includes any and all combinations of one or more of the related listed items.

[0025] As Figure 1 shown, an embodiment of this application provides a hydrogen production device, which includes a hydrogen production power supply (shown in the dotted box in the figure) and an energy management system EMS;

[0026] The hydrogen production power supply includes an AC connection end a, an electrolyzer connection end A, and at least one DC power supply end n. The AC connection end a is connected to the power grid through a transformer. The electrolyzer connection end A is connected to the electrolyzer, and the DC power supply end n is connected to the new energy component;

[0027] The energy management system is used to control the hydrogen production power supply so that the new energy component and / or the power grid supplies power to the electrolyzer.

[0028] Among them, the power grid includes a new energy power grid, and the new energy component includes a photovoltaic component and / or an energy storage unit.

[0029] In one embodiment, the main circuit of the hydrogen production power supply includes a connected first conversion module, a second conversion module, and a third conversion module. The first conversion module includes an AC connection end, the second conversion module includes a DC power supply end, and the third conversion module includes an electrolyzer connection end;

[0030] The first conversion module is used to convert the AC current of the power grid into a DC current and transmit the DC current to the second conversion module and / or the third conversion module; or, it is used to receive the DC current transmitted by the second conversion module, convert the DC current into an AC current, and transmit the AC current to the power grid;

[0031] The second conversion module is used to receive the DC current transmitted by the first conversion module and transmit the DC current to the new energy component, and / or transmit the DC current to the third conversion module; or, it is used to receive the DC current of the new energy component and transmit the DC current to the first conversion module and / or the third conversion module;

[0032] The third conversion module is used to transmit the DC current transmitted by the first conversion module and / or the second conversion module to the electrolyzer after conversion.

[0033] To Figure 2For example, the first transformation module includes: capacitors C1 to C4, inductors La, Lb, and Lc, and switching devices S1 to S6. Capacitors C1 to C3, inductors La, Lb, and Lc form an AC connection terminal and are connected to the three phases U, V, and W of the power grid.

[0034] The second transformation module includes: switching devices Q1 to Q4, inductor Lb, and inductor Lp. Switching devices Q1, Q2, and inductor Lp form a DC power supply terminal to connect to a new energy component, such as a photovoltaic module; switching devices Q3, Q4, and inductor Lv form another DC power supply terminal to connect to another new energy component, such as an energy storage unit.

[0035] The third transformation module includes: capacitors C5, C6, switching devices T1 to T2n + 1, and inductors L1 to Ln. Inductors L1 to Ln, and capacitor C6 form an electrolytic cell connection terminal to connect to an electrolytic cell.

[0036] Specifically, the connection relationships are as follows:

[0037] The grid connection U terminal is connected to the 1 - end of filtering capacitor C1 and the 1 - end of inductor La. The grid connection V terminal is connected to the 1 - end of filtering capacitor C2 and the 1 - end of inductor Lb. The grid connection W terminal is connected to the 1 - end of filtering capacitor C3 and the 1 - end of inductor Lc. The 2 - ends of capacitor C1, C2, and C3 are connected together. The 2 - end of inductor La is connected to the 2 - end of switching device S1 and the 1 - end of switching device S2. The 2 - end of inductor Lb is connected to the 2 - end of switching device S3 and the 1 - end of switching device S4. The 2 - end of inductor Lc is connected to the 2 - end of switching device S5 and the 1 - end of switching device S6.

[0038] The 1 - end of switching device S1 is connected to the 1 - end of switching device S3, and at the same time is connected to the 1 - end of switching device S5 and the 1 - end of capacitor C4. The 2 - end of switching device S2 is connected to the 2 - end of switching device S4, and at the same time is connected to the 2 - end of switching device S6 and the 2 - end of capacitor C4.

[0039] The 1 - end of capacitor C4 is connected to the 1 - end of switching device Q1, and at the same time is connected to the 1 - end of switching device Q3 and the 1 - end of capacitor C5. The 2 - end of capacitor C4 is connected to the 2 - end of switching device Q2, and at the same time is connected to the 2 - end of switching device Q4 and the 2 - end of capacitor C5. The 2 - end of switching device Q1 is connected to the 1 - end of switching device Q2 and the 1 - end of inductor Lp. The 2 - end of switching device Q3 is connected to the 1 - end of switching device Q4 and the 1 - end of inductor Lv.

[0040] Terminal 2 of the switching device Q2 is connected to the negative interface of the DC power supply terminal; Terminal 2 of the inductor Lp is connected to the positive interface of the DC power supply terminal; Terminal 2 of the switching device Q4 is connected to the negative interface of the DC power supply terminal. Terminal 2 of the inductor Lv is connected to the positive interface of the DC power supply terminal;

[0041] One terminal of the capacitor C5 is simultaneously connected to Terminal 1 of the switching device T1, simultaneously connected to Terminal 1 of the switching device T3,..., simultaneously connected to Terminal 1 of the switching device T2n - 1; The other terminal of the capacitor C5 is simultaneously connected to Terminal 2 of the switching device T2, simultaneously connected to Terminal 2 of the switching device T4,..., simultaneously connected to Terminal 2 of the switching device T2n + 1, simultaneously connected to the other terminal of the capacitor C6, and simultaneously connected to the negative electrode of the electrolytic cell; Terminal 2 of the switching device T1 is simultaneously connected to Terminal 1 of the switching device T2 and simultaneously connected to Terminal 1 of the inductor L1; Terminal 2 of the switching device T3 is simultaneously connected to Terminal 1 of the switching device T4 and simultaneously connected to Terminal 1 of the inductor L2;...; Terminal 2 of the switching device T2n - 1 is simultaneously connected to Terminal 1 of the switching device T2n + 1 and simultaneously connected to Terminal 1 of the inductor Ln; Terminal 2 of the inductor L1 is connected to Terminal 2 of the inductor L2,..., simultaneously connected to Terminal 2 of the inductor Ln, simultaneously connected to one terminal of the capacitor C6, and simultaneously connected to the positive electrode of the electrolytic cell.

[0042] As Figure 3 shown, in one example, the DC power supply terminal includes a photovoltaic interface, and the new energy component includes a photovoltaic module;

[0043] The energy management system is used for:

[0044] Controlling the hydrogen production power supply to enter the first grid - power hydrogen production mode so that the power grid supplies power to the electrolytic cell; In the first grid - power hydrogen production mode, if the power of the photovoltaic module is higher than the first minimum preset power threshold, it is further used to control the hydrogen production power supply to enter the first photovoltaic hydrogen production mode so that the photovoltaic module supplies power to the electrolytic cell.

[0045] Among them, when the hydrogen production power supply is in the first photovoltaic hydrogen production mode, the energy management system is specifically used for:

[0046] If the power of the photovoltaic module is higher than the first maximum preset power threshold, controlling the hydrogen production power supply to enter the first feedback operation mode to feed back the excess energy of the photovoltaic module to the power grid;

[0047] If the power of the photovoltaic module is lower than the first maximum preset power threshold, providing all the energy of the photovoltaic module to the electrolytic cell and supplementing the insufficient part with the electric energy of the power grid;

[0048] If the power of the photovoltaic module is lower than the first minimum preset power threshold, switching back to the first grid - power hydrogen production mode.

[0049] For example, asFigure 4 As shown, when the system is ready, the hydrogen production power supply defaults to the grid-connected hydrogen production mode, and the hydrogen production obtains electric energy from the grid. At the same time, it detects and judges whether the power Pv of the photovoltaic module is greater than the minimum starting power Pvmin. If the condition is met, the photovoltaic module enters the MPPT working mode and enters the photovoltaic hydrogen production mode. When the power Pv of the photovoltaic module is less than the maximum preset power threshold Pvmax, all the power of the photovoltaic module is used for hydrogen production, and the insufficient part of the power is controlled to be supplemented by the grid electric energy. In the photovoltaic hydrogen production mode, it also judges whether the power Pv of the photovoltaic module is less than the minimum starting power Pvmin. When the power Pv of the photovoltaic module is less than the minimum starting power Pvmin, it switches back to the grid-connected hydrogen production mode. In the photovoltaic hydrogen production mode, it also judges whether the power Pv of the photovoltaic module is greater than the maximum preset power threshold Pvmax. When the power Pv of the photovoltaic module is greater than the maximum preset power threshold Pvmax, the grid side of the hydrogen production power supply enters the feedback state, and the excess electric energy of the photovoltaic is fed back to the grid.

[0050] As Figure 5 shown, in one example, the DC power supply terminal includes an energy storage interface, and the new energy module includes an energy storage unit; the energy storage unit can be a battery module or other types of energy storage units such as super capacitors. The energy management system is further configured to:

[0051] Control the hydrogen production power supply to enter the second grid-connected hydrogen production mode, so that the grid supplies power to the electrolyzer, and at the same time control the hydrogen production power supply to charge the energy storage unit;

[0052] When the power of the energy storage unit is higher than the second maximum preset power threshold, control the hydrogen production power supply to stop charging the energy storage unit, so that the energy storage unit enters the standby state;

[0053] When the energy storage unit is in the standby state, if the electricity price is higher than the preset electricity price threshold, control the hydrogen production power supply to enter the first energy storage hydrogen production mode, so that the energy storage unit supplies power to the electrolyzer.

[0054] Wherein, the energy management system is specifically configured to:

[0055] In the first energy storage hydrogen production mode, if the power of the energy storage unit is lower than the second minimum preset power threshold, control the hydrogen production power supply to switch back to the second grid-connected hydrogen production mode.

[0056] For example, as Figure 6As shown, when the system is ready, the hydrogen production power supply defaults to the grid-powered hydrogen production mode. The hydrogen production power supply obtains electrical energy from the grid. At the same time, the energy management system controls the hydrogen production power supply to charge the energy storage unit. In the foregoing working state, the power Pc of the energy storage unit is detected and judged simultaneously to see if it is greater than the maximum preset power threshold Pcmax. When the power of the energy storage unit is greater than the maximum preset power threshold Pcmax, the hydrogen production power supply is controlled to stop charging the energy storage unit, and the energy storage unit enters the standby state. In the foregoing working mode, the electricity price is judged according to a preset model to see if it is greater than the preset electricity price threshold P1. When the electricity price is greater than the preset electricity price threshold P1, the hydrogen production power supply is controlled to enter the energy storage hydrogen production mode. In the foregoing energy storage hydrogen production mode, the power Pc of the energy storage unit is judged simultaneously to see if it is less than the minimum preset power threshold Pcmin. When the power of the energy storage unit is less than the minimum preset power threshold Pcmin, the hydrogen production power supply is controlled to enter the grid-powered hydrogen production mode to charge the energy storage unit.

[0057] As Figure 7 shown, in one example, the DC power supply terminal includes a photovoltaic interface and an energy storage interface, and the new energy components include a photovoltaic module and an energy storage unit. The energy management system is used for:

[0058] Controlling the hydrogen production power supply to enter the third grid-powered hydrogen production mode so that the grid supplies power to the electrolyzer;

[0059] In the third grid-powered hydrogen production mode, if the power of the photovoltaic module is higher than the third minimum preset power threshold, the hydrogen production power supply is controlled to enter the second photovoltaic hydrogen production mode so that the photovoltaic module supplies power to the electrolyzer;

[0060] In the second photovoltaic hydrogen production mode, if the power of the photovoltaic module is lower than the third maximum preset power threshold, all the energy of the photovoltaic module is provided to the electrolyzer and the insufficient part is supplemented by the electrical energy of the grid;

[0061] In the second photovoltaic hydrogen production mode, if the power of the photovoltaic module is higher than the third maximum preset power threshold, the hydrogen production power supply is controlled to charge the energy storage unit to store the excess energy of the photovoltaic module in the energy storage unit;

[0062] In the second photovoltaic hydrogen production mode, if the power of the photovoltaic module is lower than the third minimum preset power threshold, the hydrogen production power supply is controlled to enter the second energy storage hydrogen production mode so that the energy storage unit supplies power to the electrolyzer.

[0063] Among them, the energy management is specifically used for:

[0064] When controlling the hydrogen production power supply to charge the energy storage unit, if the power of the energy storage unit is higher than the fourth maximum preset power threshold, control the hydrogen production power supply to enter the second feedback working mode to feed back the excess energy to the power grid;

[0065] When controlling the hydrogen production power supply to charge the energy storage unit, if the power of the photovoltaic module is lower than the third maximum preset power threshold, control the hydrogen production power supply to switch back to the second photovoltaic hydrogen production mode.

[0066] Wherein, the energy management system is further configured to, in the second energy storage hydrogen production mode, if the power of the energy storage unit is lower than the fourth minimum preset power threshold, switch back to the third grid power hydrogen production mode.

[0067] For example, as Figure 8 shown, when the system is ready, the hydrogen production power supply defaults to the grid power hydrogen production mode, and the hydrogen production obtains electric energy from the grid;

[0068] At the same time, detect and judge whether the power Pv of the photovoltaic module is greater than the minimum starting power Pvmin. If the condition is met, the photovoltaic module enters the MPPT working mode and enters the photovoltaic hydrogen production mode. When the power Pv of the photovoltaic module is less than the maximum preset power threshold Pvmax, all the photovoltaic power is used for hydrogen production, and the insufficient power part is controlled to be supplemented by the grid electric energy; in the photovoltaic hydrogen production mode, at the same time, judge whether the power Pv of the photovoltaic module is greater than the maximum preset power threshold Pvmax. When the power Pv of the photovoltaic module is greater than the maximum preset power threshold Pvmax, control the hydrogen production power supply to charge the energy storage unit and store the excess photovoltaic electric energy in the energy storage unit; in the above-mentioned photovoltaic hydrogen production working mode, at the same time, judge whether the power Pv of the photovoltaic module is less than the minimum preset power threshold Pvmin. When the power Pv of the photovoltaic module is less than the minimum preset power threshold Pvmin, control the energy storage unit to enter the hydrogen production working mode, and the energy storage unit provides the hydrogen production power.

[0069] In the above-mentioned working state, at the same time, judge whether the power Pc of the energy storage unit is greater than the maximum preset power threshold Pcmax (at the same time Pv > Pvmax). When the power Pc of the energy storage unit is greater than Pcmax (at the same time Pv > Pvmax), control the grid side of the hydrogen production power supply to enter the feedback working mode; further, judge whether the power Pv of the photovoltaic module is less than the maximum preset power threshold Pvmax. When the power Pv of the photovoltaic module is less than the maximum preset power threshold Pvmax, control the grid side of the hydrogen production power supply to exit the feedback mode and enter the photovoltaic energy priority hydrogen production mode, and the insufficient power is controlled to be supplemented by the grid side electric energy;

[0070] In the foregoing operating state, it is simultaneously determined whether the power Pc of the energy storage unit is less than the minimum preset power threshold Pcmin. When the power Pc of the energy storage unit is less than the minimum preset power threshold Pcmin, the grid power hydrogen production operating mode is returned. When the energy storage interface is in the charging state, it is simultaneously determined whether the power Pv of the photovoltaic module is less than the minimum starting power Pvmin. When the power Pv of the photovoltaic module is less than the minimum starting power Pvmin, the energy storage unit is controlled to stop charging.

[0071] As Figure 9 shown, based on the above hydrogen production device, another embodiment of the present application provides a control method S100 for a hydrogen production device. The control method is applied to an energy management system, and the control method includes the steps:

[0072] S101. Control the hydrogen production power supply so that the new energy component and / or the power grid supply power to the electrolytic cell.

[0073] In one example, the control method further includes:

[0074] Control the hydrogen production power supply to enter the first grid power hydrogen production mode so that the power grid supplies power to the electrolytic cell;

[0075] In the first grid power hydrogen production mode, if the power of the photovoltaic module is higher than the first minimum preset power threshold, control the hydrogen production power supply to enter the first photovoltaic hydrogen production mode so that the photovoltaic module supplies power to the electrolytic cell.

[0076] In one example, the control method further includes:

[0077] In the first photovoltaic hydrogen production mode:

[0078] If the power of the photovoltaic module is higher than the first maximum preset power threshold, control the hydrogen production power supply to enter the first feedback operating mode to feedback the excess energy of the photovoltaic module to the power grid;

[0079] If the power of the photovoltaic module is lower than the first maximum preset power threshold, all the energy of the photovoltaic module is provided to the electrolytic cell and the insufficient part is supplemented by the electric energy of the power grid;

[0080] If the power of the photovoltaic module is lower than the first minimum preset power threshold, switch back to the first grid power hydrogen production mode.

[0081] In one example, the control method further includes:

[0082] Control the hydrogen production power supply to enter the second grid power hydrogen production mode so that the power grid supplies power to the electrolytic cell, and at the same time control the hydrogen production power supply to charge the energy storage unit;

[0083] When the power of the energy storage unit is higher than the second maximum preset power threshold, control the hydrogen production power supply to stop charging the energy storage unit, so that the energy storage unit enters the standby state;

[0084] When the energy storage unit is in the standby state, if the electricity price is higher than the preset electricity price threshold, control the hydrogen production power supply to enter the first energy storage hydrogen production mode, so that the energy storage unit supplies power to the electrolyzer.

[0085] In one example, the control method further includes:

[0086] In the first energy storage hydrogen production mode, if the power of the energy storage unit is lower than the second minimum preset power threshold, switch back to the second grid power hydrogen production mode.

[0087] In one example, the control method further includes:

[0088] Control the hydrogen production power supply to enter the third grid power hydrogen production mode, so that the power grid supplies power to the electrolyzer; in the third grid power hydrogen production mode, if the power of the photovoltaic module is higher than the third minimum preset power threshold, control the hydrogen production power supply to enter the second photovoltaic hydrogen production mode, so that the photovoltaic module supplies power to the electrolyzer; in the second photovoltaic hydrogen production mode, if the power of the photovoltaic module is lower than the third maximum preset power threshold, supply all the energy of the photovoltaic module to the electrolyzer and supplement the insufficient part with the electric energy of the power grid; in the second photovoltaic hydrogen production mode, if the power of the photovoltaic module is higher than the third maximum preset power threshold, control the hydrogen production power supply to charge the energy storage unit to store the excess energy of the photovoltaic module in the energy storage unit; in the second photovoltaic hydrogen production mode, if the power of the photovoltaic module is lower than the third minimum preset power threshold, control the hydrogen production power supply to enter the second energy storage hydrogen production mode, so that the energy storage unit supplies power to the electrolyzer.

[0089] In one example, the control method further includes:

[0090] When controlling the hydrogen production power supply to charge the energy storage unit, if the power of the energy storage unit is higher than the fourth maximum preset power threshold, control the hydrogen production power supply to enter the second feedback working mode to feed back the excess energy to the power grid; when controlling the hydrogen production power supply to charge the energy storage unit, if the power of the photovoltaic module is lower than the third maximum preset power threshold, switch back to the second photovoltaic hydrogen production mode.

[0091] In one example, the control method further includes:

[0092] In the second energy storage hydrogen production mode, if the power of the energy storage unit is lower than the fourth minimum preset power threshold, switch back to the third grid power hydrogen production mode.

[0093] It should be noted that the description and drawings of the present application provide preferred embodiments of the present application. However, the present application can be implemented in many different forms and is not limited to the embodiments described in this specification. These embodiments do not impose additional limitations on the content of the present application. The purpose of providing these embodiments is to make the understanding of the disclosed content of the present application more thorough and comprehensive. Further, the above technical features continue to be combined with each other to form various embodiments not listed above, which are all regarded as within the scope described in the specification of the present application. Further, for those of ordinary skill in the art, improvements or changes can be made according to the above description, and all such improvements and changes should fall within the protection scope of the appended claims of the present application.

Claims

1. A hydrogen production device, characterized in that, The hydrogen production device includes a hydrogen production power supply and an energy management system; The hydrogen production power supply includes an AC connection terminal, an electrolyzer connection terminal, and at least one DC power supply terminal. The AC connection terminal is connected to the power grid, the electrolyzer connection terminal is connected to the electrolyzer, and the DC power supply terminal is connected to the new energy component; The energy management system is used to control the hydrogen production power supply so that the new energy component and / or the power grid supplies power to the electrolyzer.

2. The hydrogen production device according to claim 1, wherein, The main circuit of the hydrogen production power supply includes a first conversion module, a second conversion module, and a third conversion module connected in series. The first conversion module includes the AC connection terminal, the second conversion module includes the DC power supply terminal, and the third conversion module includes the electrolyzer connection terminal; The first conversion module is used to convert the AC current of the power grid into a DC current and transmit the DC current to the second conversion module and / or the third conversion module; or, it is used to receive the DC current transmitted by the second conversion module, convert the DC current into an AC current, and transmit the AC current to the power grid; The second conversion module is used to receive the DC current transmitted by the first conversion module and transmit the DC current to the new energy component and / or transmit the DC current to the third conversion module; or, it is used to receive the DC current of the new energy component and transmit the DC current to the first conversion module and / or the third conversion module; The third conversion module is used to transmit the DC current transmitted by the first conversion module and / or the second conversion module to the electrolyzer after conversion.

3. The hydrogen production device according to claim 1, wherein The DC power supply terminal includes a photovoltaic interface, and the new energy component includes a photovoltaic module; the energy management system is used for: Controlling the hydrogen production power supply to enter the first grid power hydrogen production mode so that the power grid supplies power to the electrolyzer; In the first grid power hydrogen production mode, if the power of the photovoltaic module is higher than the first minimum preset power threshold, then control the hydrogen production power supply to enter the first photovoltaic hydrogen production mode so that the photovoltaic module supplies power to the electrolyzer.

4. The hydrogen production device according to claim 3, characterized in that, When the hydrogen production power supply is in the first photovoltaic hydrogen production mode, the energy management system is specifically used for: If the power of the photovoltaic module is higher than the first maximum preset power threshold, then control the hydrogen production power supply to enter the first feedback working mode to feed back the excess energy of the photovoltaic module to the power grid; If the power of the photovoltaic module is lower than the first maximum preset power threshold, then control the photovoltaic module to provide all the energy to the electrolyzer and the insufficient part is supplemented by the electric energy of the power grid; If the power of the photovoltaic module is lower than the first minimum preset power threshold, then control the hydrogen production power supply to switch back to the first grid power hydrogen production mode.

5. The hydrogen production device according to claim 1, characterized in that The DC power supply terminal includes an energy storage interface, and the new energy component includes an energy storage unit; the energy management system is further used for: Controlling the hydrogen production power supply to enter the second grid power hydrogen production mode so that the power grid supplies power to the electrolyzer, and at the same time controlling the hydrogen production power supply to charge the energy storage unit; When the power of the energy storage unit is higher than the second maximum preset power threshold, control the hydrogen production power supply to stop charging the energy storage unit, so that the energy storage unit enters the standby state; When the energy storage unit is in the standby state, if the electricity price is higher than the preset electricity price threshold, control the hydrogen production power supply to enter the first energy storage hydrogen production mode, so that the energy storage unit supplies power to the electrolyzer.

6. The hydrogen production device according to claim 5, wherein, The energy management system is specifically used for: In the first energy storage hydrogen production mode, if the power of the energy storage unit is lower than the second minimum preset power threshold, control the hydrogen production power supply to switch back to the second grid power hydrogen production mode.

7. The hydrogen production device according to claim 1, characterized in that, The DC power supply terminal includes a photovoltaic interface and an energy storage interface, and the new energy components include a photovoltaic module and an energy storage unit; the energy management system is used for: Control the hydrogen production power supply to enter the third grid power hydrogen production mode, so that the power grid supplies power to the electrolyzer; In the third grid power hydrogen production mode, if the power of the photovoltaic module is higher than the third minimum preset power threshold, control the hydrogen production power supply to enter the second photovoltaic hydrogen production mode, so that the photovoltaic module supplies power to the electrolyzer; In the second photovoltaic hydrogen production mode, if the power of the photovoltaic module is lower than the third maximum preset power threshold, control the photovoltaic module to provide all its energy to the electrolyzer and supplement the insufficient part with the electric energy of the power grid; In the second photovoltaic hydrogen production mode, if the power of the photovoltaic module is higher than the third maximum preset power threshold, control the hydrogen production power supply to charge the energy storage unit to store the excess energy of the photovoltaic module in the energy storage unit; In the second photovoltaic hydrogen production mode, if the power of the photovoltaic module is lower than the third minimum preset power threshold, control the hydrogen production power supply to enter the second energy storage hydrogen production mode, so that the energy storage unit supplies power to the electrolyzer.

8. The hydrogen production device according to claim 7, wherein The energy management system is specifically used for: When controlling the hydrogen production power supply to charge the energy storage unit, if the power of the energy storage unit is higher than the fourth maximum preset power threshold, control the hydrogen production power supply to enter the second feedback working mode to feed back the excess energy to the power grid; When controlling the hydrogen production power supply to charge the energy storage unit, if the power of the photovoltaic module is lower than the third maximum preset power threshold, control the hydrogen production power supply to switch back to the second photovoltaic hydrogen production mode.

9. The hydrogen production device according to claim 7, characterized in that, The energy management system is also used to switch back to the third grid power hydrogen production mode in the second energy storage hydrogen production mode if the power of the energy storage unit is lower than the fourth minimum preset power threshold.

10. A control method for a hydrogen production device, characterized in that, The hydrogen production device includes a hydrogen production power supply and an energy management system; The hydrogen production power supply includes an AC connection terminal, an electrolyzer connection terminal, and at least one DC power supply terminal. The AC connection terminal is connected to the power grid, the electrolyzer connection terminal is connected to the electrolyzer, and the DC power supply terminal is connected to the new energy components; The control method is applied to the energy management system, and the control method includes: Control the hydrogen production power supply so that the new energy components and / or the power grid supply power to the electrolyzer.

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