Hydrogen production circuit, hydrogen production circuit control method and hydrogen production power supply

Abstract

The invention relates to a hydrogen production circuit, a hydrogen production circuit control method and a hydrogen production power supply, the hydrogen production circuit comprises a rectification matrix circuit and a high-frequency transformer, the rectification matrix circuit is used for connecting an input power supply and a primary side of the high-frequency transformer, and a secondary side of the high-frequency transformer is used for connecting an electrolytic cell. The rectification matrix circuit is used for conditioning driving electric energy of an input power supply and transmitting the conditioned driving electric energy to a primary side of the high-frequency transformer, the high-frequency transformer performs voltage transformation on the conditioned driving electric energy to obtain hydrogen production electric energy, and the hydrogen production electric energy is transmitted to the electrolytic cell, so that the electrolytic cell generates hydrogen based on the hydrogen production electric energy. Driving electric energy of an input power supply is conditioned through a rectification matrix circuit, the harmonic content is reduced, and the power factor is improved; hydrogen production electric energy is obtained through the high-frequency transformer, electrical isolation is achieved, the power density is improved, and the hydrogen production efficiency is jointly improved through combination of the electrical isolation and the power density.

Description

Technical Field

[0001] The present application relates to the field of new energy technology, and in particular to a hydrogen production circuit, a hydrogen production circuit control method, and a hydrogen production power supply. Background Art

[0002] In recent years, with the increasing depletion of fossil energy and the attention paid to environmental issues by humans, the development of renewable energy has become an important measure to solve these problems. Among various renewable energy sources, hydrogen, as a "zero-carbon, zero-pollution" energy, has an increasing share in the energy development process year by year. Therefore, hydrogen power generation technology has received great attention from scientific researchers and engineering technicians.

[0003] Traditional hydrogen production power sources mostly use a combination of 6-pulse or 12-pulse rectifier transformers and thyristor rectifier bridges, which control the DC voltage by adjusting the trigger angle of the thyristor to make the electrolyzer produce hydrogen. However, this type of hydrogen production power source generates a high harmonic content during the hydrogen production process, causing energy loss and low hydrogen production efficiency. Summary of the invention

[0004] Based on this, it is necessary to provide a hydrogen production circuit, a hydrogen production circuit control method and a hydrogen production power supply that can improve the hydrogen production efficiency in response to the above technical problems.

[0005] In a first aspect, the present application provides a hydrogen production circuit, comprising a rectifier matrix circuit and a high-frequency transformer, wherein the rectifier matrix circuit is used to connect an input power supply and a primary side of the high-frequency transformer, and the secondary side of the high-frequency transformer is used to connect an electrolyzer;

[0006] The rectifier matrix circuit is used to condition the driving power of the input power supply and transmit the conditioned driving power to the primary side of the high-frequency transformer. The high-frequency transformer transforms the conditioned driving power to obtain hydrogen-producing power and transmits it to the electrolyzer, so that the electrolyzer produces hydrogen based on the hydrogen-producing power.

[0007] In one embodiment, the rectifier matrix circuit includes a bidirectional bridge arm, and the bidirectional bridge arm connects the input power supply and the primary side of the high-frequency transformer.

[0008] In one embodiment, the number of the bidirectional bridge arms is three.

[0009] In one embodiment, the bidirectional bridge arm includes an upper bridge arm and a lower bridge arm, the upper bridge arm and the lower bridge arm are connected in series, and the two ends of the series connection are respectively connected to the two ends of the primary side of the high-frequency transformer, and the common end where the upper bridge arm and the lower bridge arm are connected is connected to the input power supply.

[0010] In one embodiment, the upper bridge arm and the lower bridge arm respectively include two switch tubes connected in series, and the conduction directions of the two switch tubes connected in series are opposite.

[0011] In one of the embodiments, the hydrogen production circuit further includes an input-side filter circuit, and the input-side filter circuit is connected to the input power supply and the rectifier matrix circuit.

[0012] In one of the embodiments, the hydrogen production circuit further includes an output-side rectifier circuit, and the output-side rectifier circuit is connected to the secondary side of the high-frequency transformer and the electrolytic cell.

[0013] In one of the embodiments, the hydrogen production circuit further includes an output side filter circuit, and the output side filter circuit is connected to the output side rectifier circuit and the electrolyzer.

[0014] In a second aspect, the present application provides a hydrogen production circuit control method, which is implemented based on the hydrogen production circuit described in the above embodiments, and includes:

[0015] Obtain driving power from input power;

[0016] Splitting the driving electric energy into a plurality of vector parameters, and determining a duty cycle parameter corresponding to each of the vector parameters;

[0017] The rectifier matrix circuit is controlled based on the duty cycle parameters.

[0018] In a third aspect, the present application provides a hydrogen production power supply, which includes an electrolyzer, an input power supply, a controller, and a hydrogen production circuit as described in the above embodiments, wherein the hydrogen production circuit connects the electrolyzer and the input power supply, and the controller connects the input power supply and the hydrogen production circuit, and is used to control the hydrogen production circuit to provide hydrogen production electricity to the electrolyzer based on the method described in the above embodiments, so that the electrolyzer produces hydrogen based on the hydrogen production electricity.

[0019] In a fourth aspect, the present application also provides a hydrogen production circuit control device, comprising:

[0020] An input detection module, used to obtain driving power from an input power source;

[0021] A calculation module, used for splitting the driving electric energy into a plurality of vector parameters and determining a duty cycle parameter corresponding to each of the vector parameters;

[0022] An output control module is used to control the rectifier matrix circuit based on each of the duty cycle parameters.

[0023] In a fifth aspect, the present application further provides a computer device, comprising a memory and a processor, wherein the memory stores a computer program, and when the processor executes the computer program, the following steps are implemented:

[0024] Obtain driving power from input power;

[0025] Splitting the driving electric energy into a plurality of vector parameters, and determining a duty cycle parameter corresponding to each of the vector parameters;

[0026] The rectifier matrix circuit is controlled based on the duty cycle parameters.

[0027] In a sixth aspect, the present application further provides a computer-readable storage medium having a computer program stored thereon, wherein when the computer program is executed by a processor, the following steps are implemented:

[0028] Obtain driving power from input power;

[0029] Splitting the driving electric energy into a plurality of vector parameters, and determining a duty cycle parameter corresponding to each of the vector parameters;

[0030] The rectifier matrix circuit is controlled based on the duty cycle parameters.

[0031] In a seventh aspect, the present application further provides a computer program product, including a computer program, which implements the following steps when executed by a processor:

[0032] Obtain driving power from input power;

[0033] Splitting the driving electric energy into a plurality of vector parameters, and determining a duty cycle parameter corresponding to each of the vector parameters;

[0034] The rectifier matrix circuit is controlled based on the duty cycle parameters.

[0035] The above-mentioned hydrogen production circuit, hydrogen production circuit control method and hydrogen production power supply include a rectifier matrix circuit and a high-frequency transformer. The rectifier matrix circuit is used to connect the input power supply and the primary side of the high-frequency transformer, and the secondary side of the high-frequency transformer is used to connect the electrolyzer. The rectifier matrix circuit is used to condition the driving power of the input power supply and transmit the conditioned driving power to the primary side of the high-frequency transformer. The high-frequency transformer transforms the conditioned driving power to obtain hydrogen production power and transmits it to the electrolyzer, so that the electrolyzer produces hydrogen based on the hydrogen production power. The driving power of the input power supply is regulated by the rectifier matrix circuit, the harmonic content is reduced, and the power factor is improved; the hydrogen production power is obtained by the high-frequency transformer, electrical isolation is achieved and the power density is improved. The combination of the two improves the efficiency of hydrogen production. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the technical solutions in the embodiments of the present application or related technologies, the drawings required for use in the embodiments of the present application or related technical descriptions will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other related drawings can be obtained based on these drawings without paying creative work.

[0037] FIG1 is an application environment diagram of a hydrogen production circuit in one embodiment;

[0038] FIG2 is a block diagram of a hydrogen production circuit in one embodiment;

[0039] FIG3 is a block diagram of a hydrogen production circuit in another embodiment;

[0040] FIG4 is a circuit diagram of a bidirectional bridge arm in one embodiment;

[0041] FIG5 is a circuit diagram of a hydrogen production circuit in one embodiment;

[0042] FIG6 is a schematic flow chart of a method for controlling a hydrogen production circuit in one embodiment;

[0043] FIG7 is a spatial distribution diagram of current vectors in one embodiment;

[0044] FIG8 is a composite diagram of a current reference vector in one embodiment;

[0045] FIG9 is a structural block diagram of a hydrogen production circuit control device in one embodiment;

[0046] FIG. 10 is a diagram showing the internal structure of a computer device in one embodiment.

[0047] Explanation of the accompanying drawings: input side filter circuit 1, rectification matrix circuit 2, bidirectional bridge arm 21, upper bridge arm 211, lower bridge arm 212, high-frequency transformer 3, output side rectification circuit 4, output side filter circuit 5. DETAILED DESCRIPTION

[0048] In order to make the purpose, technical solution and advantages of the present application more clearly understood, the present application is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present application and are not used to limit the present application.

[0049] It is understood that the terms "first", "second", etc. used in this application may be used herein to describe various elements, but these elements are not limited by these terms. These terms are only used to distinguish a first element from another element. For example, without departing from the scope of this application, a first resistor may be referred to as a second resistor, and similarly, a second resistor may be referred to as a first resistor. Both the first resistor and the second resistor are resistors, but they are not the same resistor.

[0050] It can be understood that the “connection” in the following embodiments should be understood as “electrical connection”, “communication connection”, etc. if the connected circuits, modules, units, etc. have electrical signals or data transmission between each other.

[0051] When used herein, the singular forms "a", "an", and "said / the" may also include plural forms, unless the context clearly indicates otherwise. It should also be understood that the terms "include / comprise" or "have" and the like specify the presence of stated features, wholes, steps, operations, components, parts, or combinations thereof, but do not exclude the possibility of the presence or addition of one or more other features, wholes, steps, operations, components, parts, or combinations thereof. At the same time, the term "and / or" used in this specification includes any and all combinations of the relevant listed items.

[0052] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0053] As a pollution-free, long-term storable and renewable clean energy, hydrogen has gradually been widely used in modern industry, and hydrogen production technology has also developed with the increasing demand for hydrogen. In the hydrogen production process, hydrogen is usually produced by an electrolyzer, and electrical energy is transmitted to the electrode of the electrolyzer, so that the liquid in the electrolyzer is electrolyzed to produce hydrogen. Most traditional hydrogen production power supplies use a combination of 6-pulse or 12-pulse rectifier transformers and thyristor rectifier bridges. The DC voltage is controlled by adjusting the trigger angle of the thyristor to make the electrolyzer produce hydrogen. However, this type of hydrogen production power supply has defects such as large rectifier transformers, high harmonic content, low power factor, and high energy loss, which limits the efficiency of hydrogen production. To this end, the present application provides a hydrogen production circuit to control the electrolyzer to obtain electrical energy, reduce the harmonic content in the electrical energy, improve the power factor and energy utilization, and achieve the goal of improving the efficiency of hydrogen production.

[0054] In one embodiment, the application scenario of the hydrogen production circuit is shown in FIG1. ​​The present application provides a hydrogen production circuit, including a rectifier matrix circuit 2 and a high-frequency transformer 3. The rectifier matrix circuit 2 is used to connect the input power supply and the primary side of the high-frequency transformer 3, and the secondary side of the high-frequency transformer 3 is used to connect the electrolyzer. The rectifier matrix circuit 2 is used to condition the driving power of the input power supply and transmit the conditioned driving power to the primary side of the high-frequency transformer 3. The high-frequency transformer 3 transforms the conditioned driving power to obtain hydrogen production power and transmits it to the electrolyzer, so that the electrolyzer produces hydrogen based on the hydrogen production power.

[0055] The input power source is used to provide driving power for hydrogen production, which can be different power sources such as batteries, new energy grids, and three-phase grids, and provide AC or DC power accordingly. With different input power sources, the parameters of the driving power are also different, including the voltage and phase of the power.

[0056] The rectifier matrix circuit 2 is connected to the input power supply and is used to condition the driving power of the input power supply. The parameters of the driving power are adjusted and changed by the conditioning of the rectifier matrix circuit 2 to obtain the conditioned driving power. The rectifier drive circuit is connected to the primary side of the high-voltage transformer and transmits the conditioned driving power to the primary side of the high-frequency transformer 3.

[0057] The high-frequency transformer 3 refers to a power transformer with an operating frequency exceeding the medium frequency (10kHz), which can be used for voltage input and output at a higher frequency. In this embodiment, the conditioned driving electric energy can be transformed. The high-frequency transformer 3 transforms the conditioned driving electric energy to obtain hydrogen production electric energy, and transmits it to the electrolyzer connected to the secondary side of the high-frequency transformer 3, so that the electrolyzer produces hydrogen based on the hydrogen production electric energy.

[0058] Optionally, the two ends of the secondary side of the high-frequency transformer 3 are respectively connected to the two pole pieces of the electrolytic cell, that is, the first end of the secondary side of the high-frequency transformer 3 is connected to the first pole piece of the electrolytic cell, and the second end of the secondary side of the high-frequency transformer 3 is connected to the second pole piece of the electrolytic cell.

[0059] In this embodiment, the hydrogen production circuit includes a rectifier matrix circuit 2 and a high-frequency transformer 3. The rectifier matrix circuit 2 is used to connect the input power supply and the primary side of the high-frequency transformer 3, and the secondary side of the high-frequency transformer 3 is used to connect the electrolyzer. The rectifier matrix circuit 2 is used to condition the driving power of the input power supply and transmit the conditioned driving power to the primary side of the high-frequency transformer 3. The high-frequency transformer 3 transforms the conditioned driving power to obtain hydrogen production power and transmits it to the electrolyzer, so that the electrolyzer produces hydrogen based on the hydrogen production power. The driving power of the input power supply is conditioned by the rectifier matrix circuit 2, the harmonic content is reduced, and the power factor is improved; the hydrogen production power is obtained by the high-frequency transformer 3, electrical isolation is achieved and the power density is improved. The combination of the two improves the efficiency of hydrogen production.

[0060] In one exemplary embodiment, as shown in FIG2 , the rectifier matrix circuit 2 includes a bidirectional bridge arm 21, and the bidirectional bridge arm 21 connects the input power supply and the primary side of the high-frequency transformer 3. The number of bidirectional bridge arms 21 is not limited and can be changed with the type of input power supply. For example, in one embodiment, the input power supply is a battery, and the number of bidirectional bridge arms 21 is one. In one embodiment, the input power supply is a three-phase power grid, and the number of bidirectional bridge arms 21 is three.

[0061] Among them, the bidirectional bridge arm 21 can flow current in both directions, and a switch is provided on it. The driving electric energy is regulated by opening and closing the switch, and the electric energy transmitted to the primary side of the high-frequency transformer 3 is the regulated driving electric energy. Furthermore, the bidirectional bridge arm 21 is provided with a switch group capable of controlling the flow direction of the current, and the opening and closing of the switches in the switch group are controlled to form different switch opening and closing combinations on the bidirectional bridge arm 21, thereby performing different adjustments on the driving electric energy of the input power supply, including the adjustment of the current direction.

[0062] Furthermore, in one exemplary embodiment, as shown in Figure 3, the bidirectional bridge arm 21 includes an upper bridge arm 211 and a lower bridge arm 212, the upper bridge arm 211 and the lower bridge arm 212 are connected in series, and the two ends of the series connection are respectively connected to the two ends of the primary side of the high-frequency transformer 3, and the common end connected to the upper bridge arm 211 and the lower bridge arm 212 is connected to the input power supply.

[0063] Specifically, the upper bridge arm 211 and the lower bridge arm 212 are both provided with switches. When the switch of the upper bridge arm 211 is in the on state and the switch of the lower bridge arm 212 is in the off state, the current direction of the driving electric energy in the bidirectional bridge arm 21 is from the upper bridge arm 211 to the first end of the primary side of the high-frequency transformer 3; when the switch of the upper bridge arm 211 is in the off state and the switch of the lower bridge arm 212 is in the on state, the current direction of the driving electric energy in the bidirectional bridge arm 21 is from the lower bridge arm 212 to the second end of the primary side of the high-frequency transformer 3.

[0064] Therefore, the bidirectional bridge arm 21 can output different conditioned driving electric energies to the primary side of the high-frequency transformer 3 by switching the switches of the bridge arm. Further, after the high-frequency transformer 3 transforms the conditioned driving electric energy, different hydrogen production electric energies are obtained, and the electrolyzer can produce hydrogen at different rates based on different hydrogen production electric energies.

[0065] In this embodiment, based on the control of the upper bridge arm 211 and the lower bridge arm 212 in the bidirectional bridge arm 21, the driving power of the input power supply is regulated, and the driving power can be regulated from the perspective of current direction. The hydrogen production circuit can obtain different hydrogen production powers based on different switch opening and closing combinations in the bidirectional bridge arm 21, so that the electrolyzer produces hydrogen at different rates, flexibly adjusts the hydrogen production efficiency of the electrolyzer, and ensures the flexibility and applicability of hydrogen production.

[0066] In one exemplary embodiment, as shown in FIG. 4 , the upper bridge arm 211 and the lower bridge arm 212 respectively include two switch tubes connected in series, and the conduction directions of the two switch tubes connected in series are opposite.

[0067] Taking FIG4 as an example, the four switch tubes are marked as the first switch tube, the second switch tube, the third switch tube and the fourth switch tube in order from top to bottom. The upper bridge arm 211 includes the first switch tube and the second switch tube, and the first switch tube and the second switch tube are connected in series, wherein the first switch tube is connected to the first end of the primary side of the high-frequency transformer 3, and the second switch tube is connected to the lower bridge arm 212 and the input power supply. The lower bridge arm 212 includes the third switch tube and the fourth switch tube, and the third switch tube and the fourth switch tube are connected in series, wherein the third switch tube is connected to the upper bridge arm 211 and the input power supply, and the fourth switch tube is connected to the second end of the primary side of the high-frequency transformer 3.

[0068] Exemplarily, each switch tube may be an IGBT (Insulate-Gate Bipolar Transistor) switch.

[0069] Specifically, the input end of the first switch tube is connected to the first end of the primary side of the high-frequency transformer 3, the output end of the first switch tube is connected to the output end of the second switch tube, the input end of the second switch tube is connected to the input power supply and the input end of the third switch tube, the output end of the third switch tube is connected to the output end of the fourth switch tube, and the input end of the fourth switch tube is connected to the second end of the primary side of the high-frequency transformer 3. The control end of the first switch tube, the control end of the second switch tube, the control end of the third switch tube, and the control end of the fourth switch tube can be connected to the controller, and the controller controls whether each switch tube is turned on or off.

[0070] In this embodiment, the conduction directions of the first switch tube and the second switch tube included in the upper bridge arm 211 are opposite, and the conduction directions of the third switch tube and the fourth switch tube included in the lower bridge arm 212 are opposite. By providing two series-connected switch tubes on both the upper bridge arm 211 and the lower bridge arm 212, the current direction of the driving electric energy on the bidirectional bridge arm 21 can be controlled, and the current direction can be changed by controlling the switch tube to open and close. The conduction directions of the two series-connected switch tubes are opposite, which can ensure that the current on the bridge arm can flow in both directions, and is suitable for different driving current conditioning requirements.

[0071] In order to better understand the above embodiment, as shown in FIG5 , in one embodiment, the input power source is a three-phase grid, and each phase of the three-phase grid is connected to a bidirectional bridge arm 21. The number of bidirectional bridge arms 21 is three, and the first switch tube of the first bidirectional bridge arm 21 is a switch tube S a1 The second switch tube of the first bidirectional bridge arm 21 is the switch tube S a2 The third switch tube of the first bidirectional bridge arm 21 is the switch tube S a3 The fourth switch tube of the first bidirectional bridge arm 21 is the switch tube S a4 The first switch tube of the second bidirectional bridge arm 21 is a switch tube S b1 The second switch tube of the second bidirectional bridge arm 21 is the switch tube S b2 The third switch tube of the second bidirectional bridge arm 21 is the switch tube S b3 The fourth switch tube of the second bidirectional bridge arm 21 is the switch tube S b4 The first switch tube of the third bidirectional bridge arm 21 is a switch tube S c1 The second switch tube of the third bidirectional bridge arm 21 is the switch tube S c2 The third switch tube of the third bidirectional bridge arm 21 is a switch tube S c3 The fourth switch tube of the third bidirectional bridge arm 21 is the switch tube S c4 .

[0072] The second switch tube and the third switch tube of each bidirectional bridge arm 21 are connected to the three-phase power grid, the first switch tube of each bidirectional bridge arm 21 is connected to the first end of the primary side of the high-frequency transformer 3, and the fourth switch tube of each bidirectional bridge arm 21 is connected to the second end of the primary side of the high-frequency transformer 3. By controlling the control end of each switch tube, the parameters of the driving power in the rectifier matrix circuit 2 are changed, and different conditioned driving power, such as different positive and negative alternating high-frequency voltages, are obtained and output to the primary side of the high-frequency transformer 3.

[0073] In one exemplary embodiment, as shown in FIG. 5 , the hydrogen production circuit further includes an input-side filter circuit 1 , and the input-side filter circuit 1 is connected to an input power supply and a rectifier matrix circuit 2 .

[0074] Specifically, the input side filter circuit 1 is used to filter the driving power of the input power supply to improve the conditioning efficiency of the driving power in the rectifier matrix circuit 2. Optionally, the input side filter circuit 1 can be an L-type filter, an LC-type filter or an LCL-type filter.

[0075] Exemplarily, the input side filter circuit 1 in FIG5 is an LC type filter, including an input side filter inductor L and an input side filter capacitor C, and the input side filter inductor L and the input side filter capacitor C are connected in series. Among them, the input side filter inductor L is arranged between the input power supply and the rectifier matrix circuit 2, the driving power is transmitted to the rectifier matrix circuit 2 through the input side filter inductor L, and the input side filter capacitor C is connected to the common end where the input side filter inductor L and the rectifier matrix circuit 2 are connected. The input side filter inductor L and the input side filter capacitor C constitute an LC filter to filter the driving power.

[0076] Furthermore, the number of filters in the input side filter circuit 1 matches the number of bidirectional bridge arms 21 in the rectifier matrix circuit 2. As shown in FIG5 , the number of bidirectional bridge arms 21 is three, and the number of LC filters is also three.

[0077] In one exemplary embodiment, as shown in FIG. 5 , the hydrogen production circuit further includes an output-side rectifier circuit 4 , and the output-side rectifier circuit 4 is connected to the secondary side of the high-frequency transformer 3 and the electrolytic cell.

[0078] Specifically, the output side rectifier circuit 4 is connected to the secondary side of the high frequency transformer 3, rectifies the hydrogen production electric energy output by the high frequency transformer 3, obtains the rectified hydrogen production electric energy, and transmits the filtered hydrogen production electric energy to the electrolyzer, so that the electrolyzer produces hydrogen. Optionally, the output side rectifier circuit 4 is a diode rectifier circuit.

[0079] As shown in Figure 5, the output side rectifier circuit 4 is a diode rectifier circuit, including a diode D1, a diode D2, a diode D3 and a diode D4. Among them, the diode D1 and the diode D2 are connected in series, the first end after the series connection is connected to the first end of the electrolyzer, the second end after the series connection is connected to the second end of the electrolyzer, and the common end connected by the diode D1 and the diode D2 is connected to the first end of the secondary side of the high-frequency transformer 3; the diode D3 and the diode D4 are connected in series, the first end after the series connection is connected to the first end of the electrolyzer, the second end after the series connection is connected to the second end of the electrolyzer, and the common end connected by the diode D3 and the diode D4 is connected to the second end of the secondary side of the high-frequency transformer 3. Furthermore, the conduction direction of each diode is toward the first end of the electrolyzer, so as to realize the rectification of the hydrogen production electric energy, and convert the hydrogen production electric energy, that is, the high-frequency voltage with positive and negative alternation after boosting, into a DC voltage to obtain the rectified hydrogen production electric energy.

[0080] In one exemplary embodiment, as shown in FIG. 5 , the hydrogen production circuit further includes an output side filter circuit 5 , and the output side filter circuit 5 is connected to the output side rectifier circuit 4 and the electrolyzer.

[0081] Specifically, the output side filter circuit 5 is arranged between the output side rectifier circuit 4 and the electrolyzer, and the rectified hydrogen production electric energy output by the output side rectifier circuit 4 is transmitted to the electrolyzer after filtering by the output side filter circuit 5. Optionally, the output side filter circuit 5 is an LC filter circuit.

[0082] As shown in FIG5 , the output side filter circuit 5 is an LC filter circuit, including an output side filter inductor L dc And the output side filter capacitor C dc , where the output side filter inductor L dc It is arranged between the electrolytic cell and the output side rectifier circuit 4, and connects the output side rectifier circuit 4 and the output side filter capacitor C dc and electrolytic cell, output side filter capacitor C dc Furthermore, when the output side rectifier circuit 4 is a diode rectifier circuit, the output side filter inductor L dc The electrolytic cell is connected to the side of each diode in the conducting direction, and is used to combine with the output side filter capacitor C dc The rectified hydrogen production electric energy is filtered.

[0083] In this embodiment, the hydrogen production electric energy is further processed by the output side filter circuit 5 and the output side rectifier circuit 4 to improve the quality of the hydrogen production electric energy, so as to increase the utilization rate of the hydrogen production electric energy by the electrolyzer and improve the hydrogen production efficiency.

[0084] Further, based on the same technical concept, the present application also provides a hydrogen production circuit control method, which can be applied to a hydrogen production circuit. In an exemplary embodiment, as shown in FIG6 , a hydrogen production circuit control method is provided, which is described by taking the method applied to a controller as an example, and includes the following steps 202 to 206. Among them:

[0085] Step 202: Acquire driving power from an input power source.

[0086] Specifically, the controller is connected to the input power supply, can obtain the driving power of the input power supply, and further detect the parameters of the driving power and analyze the parameters of the driving power. At the same time, the controller also stores content related to hydrogen production demand, corresponding to the parameters of the hydrogen production power required by the electrolyzer.

[0087] Step 204 , splitting the driving electric energy into a plurality of vector parameters, and confirming the duty cycle parameters corresponding to each vector parameter.

[0088] Specifically, the controller divides the driving electric energy into multiple vector parameters according to the target hydrogen production electric energy, and obtains the duty cycle parameters corresponding to each vector parameter according to the following calculations. The target hydrogen production electric energy is obtained based on the hydrogen production demand stored in the controller.

[0089] Taking the hydrogen production circuit as shown in Figure 5 as an example, each phase of the three-phase power grid is connected to a bidirectional bridge arm, and one of the upper bridge arm or the lower bridge arm in the bidirectional bridge arm is turned on and the other is turned off. Assuming that the switch tube of the upper bridge arm connected to a certain phase is turned on and the switch tube of the lower bridge arm is turned off, the state of the phase is marked as 1; if the switch tube of the lower bridge arm connected to the phase is turned on and the switch tube of the upper bridge arm is turned off, the state of the phase is marked as 0. Then, there are 8 combinations of the switch states of the three phases, namely (1, 0, 0), (1, 0, 1), (1, 1, 0), (0, 0, 1), (0, 1, 0), (0, 1, 1), (1, 1, 1), (0, 0, 0). For example, the switch state (1, 0, 0) represents that the upper bridge arm of phase A is turned on, and the lower bridge arms of phases B and C are turned on. Among these 8 switch combinations, (1, 1, 1) and (0, 0, 0) are zero vectors, and the remaining 6 combinations are valid vectors. Therefore, the vector can be divided into 6 sectors on the entire plane, that is, S=1, 2...6, and further the spatial distribution of the current vector shown in FIG. 7 can be obtained.

[0090] For example, FIG8 is a composite diagram of a current reference vector. At any time, any current vector can be synthesized by two adjacent effective vectors and a zero vector (any one of the two zero vectors). Assuming that the current is in the first sector, then the positive voltage is the voltage generated by I ab and I ac To synthesize, the negative voltage is composed of I with opposite polarity ba and I ca For example, I in FIG. r It falls in the first sector (S=1), so it can be obtained by I ab ,I ac and zero vector I0, combined with I r with I ac The duty cycle d corresponding to the three vectors is x1 ,d y1 and d0 are:

[0091]

[0092] Where m is the unit length.

[0093] By controlling the duty cycle of the corresponding switch, the high-frequency output voltage value can be adjusted. Similarly, combined with Figure 8, it can be seen that with I r Current reference vector with opposite polarity -I r Can be I x2 ,I y2and zero vector for synthesis. The calculation method is as above, which will not be repeated here. Then, any duty cycle parameter matching the target hydrogen production power can be calculated based on the above steps, and when the rectifier matrix circuit is controlled with the duty cycle parameter, the driving power can be adjusted to the target hydrogen production power.

[0094] Step 206: Control the rectifier matrix circuit based on the duty cycle parameters.

[0095] Specifically, the controller is also connected to the rectifier matrix circuit. In the above steps, the duty cycle parameters have been obtained, that is, d x1 ,d y1 and d0, the controller can control the rectifier matrix circuit according to the duty cycle parameter, and realize the output of hydrogen production power by controlling the opening and closing of the switches in the rectifier matrix circuit. Exemplarily, when the hydrogen production circuit is shown in FIG5, the controller is connected to the control end of each switch tube, and controls each switch tube to output a positive and negative alternating high-frequency transformer through dual space vector modulation.

[0096] In this embodiment, the driving power of the input power source is obtained, the driving power is split into a plurality of vector parameters, and the duty cycle parameters corresponding to each vector parameter are confirmed, and the rectifier matrix circuit is controlled based on each duty cycle parameter. The duty cycle parameters are calculated to control the rectifier matrix circuit to adjust the driving power so that the driving power matches the target hydrogen production power, thereby improving the accuracy of hydrogen production and facilitating the efficiency of hydrogen production.

[0097] On the basis of the above embodiments and based on the same technical concept, the present application also provides a hydrogen production power supply, as shown in FIG1 , the hydrogen production power supply includes an electrolyzer, an input power supply, a controller (not shown in the figure) and a hydrogen production circuit as described in the above embodiments, the hydrogen production circuit connects the electrolyzer and the input power supply, the controller connects the input power supply and the hydrogen production circuit, and is used to control the hydrogen production circuit to provide hydrogen production electricity to the electrolyzer based on the method described in the above embodiments, so that the electrolyzer produces hydrogen based on the hydrogen production electricity.

[0098] Furthermore, the hydrogen production power supply may also include a heat dissipation device, which is arranged in the hydrogen production circuit, specifically in the rectifier matrix circuit of the hydrogen production circuit, for dissipating heat from the rectifier matrix circuit and reducing the failure rate of the rectifier matrix point. Exemplarily, the heat dissipation device may be an air cooling device or a water cooling device.

[0099] Exemplarily, the controller may be a PLC, which controls the on and off of the switch tube in the rectifier matrix circuit to adjust the modulated driving power. Further, the PLC may control the switch tube through a DSP chip or an ARM chip, the PLC establishes communication with the DSP chip or the ARM chip, receives instructions issued by the PLC, and controls the on and off of the switch tube accordingly. Further, the controller may use chips such as DSP, ARM, and CPLD.

[0100] In order to better understand the above scheme, in combination with the hydrogen production power supply shown in FIG5 , a detailed explanation is given below in combination with a specific embodiment.

[0101] In one embodiment, the hydrogen production power source includes an electrolyzer, an input power source, a controller (not shown in the figure) and a hydrogen production circuit, and the hydrogen production circuit includes a rectifier matrix circuit, a high-frequency transformer, an input side filter circuit, an output side rectifier circuit and an output side filter circuit. The connection and composition of each structure have been described above and will not be repeated here.

[0102] In this embodiment, the rectifier matrix circuit has the characteristics of high input power factor, low harmonic content, simple and reliable commutation method. The IGBT switch used can connect the IGBT in series or in parallel according to the voltage / current requirements of the hydrogen production power supply, and adjust the structure of the rectifier matrix circuit in different embodiments, so as to improve the withstand voltage and current capacity of the switch tube in the hydrogen production power supply. The high-frequency transformer can play the role of voltage conversion and electrical isolation. Compared with the low-frequency transformer, the high-frequency transformer has a more compact structure and a smaller volume. Therefore, this embodiment realizes a hydrogen production power supply with the advantages of low harmonic content, adjustable power factor (can operate at unity power factor), compact structure, high energy utilization, and small footprint.

[0103] It should be understood that, although the various steps in the flowcharts involved in the above-mentioned embodiments are displayed in sequence according to the indication of the arrows, these steps are not necessarily executed in sequence according to the order indicated by the arrows. Unless there is a clear explanation in this article, the execution of these steps does not have a strict order restriction, and these steps can be executed in other orders. Moreover, at least a part of the steps in the flowcharts involved in the above-mentioned embodiments can include multiple steps or multiple stages, and these steps or stages are not necessarily executed at the same time, but can be executed at different times, and the execution order of these steps or stages is not necessarily to be carried out in sequence, but can be executed in turn or alternately with other steps or at least a part of the steps or stages in other steps.

[0104] Based on the same inventive concept, the embodiment of the present application also provides a hydrogen production circuit control device for implementing the above-mentioned hydrogen production circuit control method. The implementation solution provided by the device is similar to the implementation solution recorded in the above-mentioned method, so the specific limitations in one or more hydrogen production circuit control device embodiments provided below can refer to the above-mentioned limitations on the hydrogen production circuit control method, and will not be repeated here.

[0105] In an exemplary embodiment, as shown in FIG. 9 , a hydrogen production circuit control device is provided, including: an input detection module 920, a calculation module 940 and an output control module 960, wherein:

[0106] An input detection module 920, used to obtain driving power from an input power source;

[0107] A calculation module 940 is used to split the driving electric energy into a plurality of vector parameters and determine a duty cycle parameter corresponding to each of the vector parameters;

[0108] The output control module 960 is used to control the rectifier matrix circuit based on the duty cycle parameters.

[0109] Each module in the above hydrogen production circuit control device can be implemented in whole or in part by software, hardware and a combination thereof. Each module can be embedded in or independent of a processor in a computer device in the form of hardware, or can be stored in a memory in a computer device in the form of software, so that the processor can call and execute the operations corresponding to each module.

[0110] In an exemplary embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be shown in FIG10. The computer device includes a processor, a memory, an input / output interface, a communication interface, a display unit, and an input device. The processor, the memory, and the input / output interface are connected via a system bus, and the communication interface, the display unit, and the input device are connected to the system bus via the input / output interface. The processor of the computer device is used to provide computing and control capabilities. The memory of the computer device includes a non-volatile storage medium and an internal memory. The non-volatile storage medium stores an operating system and a computer program. The internal memory provides an environment for the operation of the operating system and the computer program in the non-volatile storage medium. The input / output interface of the computer device is used to exchange information between the processor and an external device. The communication interface of the computer device is used to communicate with an external terminal in a wired or wireless manner, and the wireless manner may be implemented through WIFI, a mobile cellular network, near field communication (NFC) or other technologies. When the computer program is executed by the processor, a hydrogen production circuit control method is implemented. The display unit of the computer device is used to form a visually visible picture, which may be a display screen, a projection device, or a virtual reality imaging device. The display screen can be a liquid crystal display screen or an electronic ink display screen, and the input device of the computer device can be a touch layer covering the display screen, or a button, trackball or touchpad set on the computer device shell, or an external keyboard, touchpad or mouse.

[0111] Those skilled in the art will understand that the structure shown in FIG. 10 is merely a block diagram of a partial structure related to the solution of the present application, and does not constitute a limitation on the computer device to which the solution of the present application is applied. The specific computer device may include more or fewer components than shown in the figure, or combine certain components, or have a different arrangement of components.

[0112] In an exemplary embodiment, a computer device is provided, including a memory and a processor, wherein a computer program is stored in the memory, and when the processor executes the computer program, the following steps are implemented:

[0113] Obtain driving power from input power;

[0114] Split the driving electric energy into multiple vector parameters and confirm the duty cycle parameters corresponding to each vector parameter;

[0115] The rectifier matrix circuit is controlled based on various duty cycle parameters.

[0116] In one embodiment, a computer-readable storage medium is provided, on which a computer program is stored, and when the computer program is executed by a processor, the following steps are implemented:

[0117] Obtain driving power from input power;

[0118] Split the driving electric energy into multiple vector parameters and confirm the duty cycle parameters corresponding to each vector parameter;

[0119] The rectifier matrix circuit is controlled based on various duty cycle parameters.

[0120] In one embodiment, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the following steps:

[0121] Obtain driving power from input power;

[0122] Split the driving electric energy into multiple vector parameters and confirm the duty cycle parameters corresponding to each vector parameter;

[0123] The rectifier matrix circuit is controlled based on various duty cycle parameters.

[0124] A person of ordinary skill in the art can understand that all or part of the processes in the above-mentioned embodiment method can be completed by instructing the relevant hardware through a computer program, and the computer program can be stored in a non-volatile computer-readable storage medium. When the computer program is executed, it can include the processes of the embodiments of the above-mentioned methods. Among them, any reference to the memory, database or other medium used in the embodiments provided in the present application can include at least one of non-volatile memory and volatile memory. Non-volatile memory can include read-only memory (ROM), magnetic tape, floppy disk, flash memory, optical memory, high-density embedded non-volatile memory, resistive random access memory (ReRAM), magnetic random access memory (MRAM), ferroelectric random access memory (FRAM), phase change memory (PCM), graphene memory, etc. Volatile memory can include random access memory (RAM) or external cache memory, etc. As an illustration and not limitation, RAM can be in various forms, such as static random access memory (SRAM) or dynamic random access memory (DRAM). The database involved in each embodiment provided in this application may include at least one of a relational database and a non-relational database. Non-relational databases may include distributed databases based on blockchains, etc., but are not limited to this. The processor involved in each embodiment provided in this application may be a general-purpose processor, a central processing unit, a graphics processor, a digital signal processor, a programmable logic device, a data processing logic device based on quantum computing, an artificial intelligence (AI) processor, etc., but are not limited to this.

[0125] The technical features of the above embodiments may be combined arbitrarily. To make the description concise, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, they should be considered to be within the scope of this application.

[0126] The above-described embodiments only express several implementation methods of the present application, and the descriptions thereof are relatively specific and detailed, but they cannot be understood as limiting the scope of the present application. It should be pointed out that, for a person of ordinary skill in the art, several variations and improvements can be made without departing from the concept of the present application, and these all belong to the protection scope of the present application. Therefore, the protection scope of the present application shall be subject to the attached claims.

Claims

1. A hydrogen production circuit, characterized in that: It includes a rectifier matrix circuit and a high-frequency transformer, wherein the rectifier matrix circuit is used to connect an input power supply and a primary side of the high-frequency transformer, and the secondary side of the high-frequency transformer is used to connect an electrolytic cell; The rectifier matrix circuit is used to condition the driving power of the input power supply and transmit the conditioned driving power to the primary side of the high-frequency transformer. The high-frequency transformer transforms the conditioned driving power to obtain hydrogen-producing power and transmits it to the electrolyzer, so that the electrolyzer produces hydrogen based on the hydrogen-producing power.

2. The hydrogen production circuit according to claim 1, characterized in that: The rectifier matrix circuit includes a bidirectional bridge arm, and the bidirectional bridge arm is connected to the input power supply and the primary side of the high-frequency transformer.

3. The hydrogen production circuit according to claim 2, characterized in that: The number of the bidirectional bridge arms is three.

4. The hydrogen production circuit according to claim 2, characterized in that: The bidirectional bridge arm includes an upper bridge arm and a lower bridge arm, the upper bridge arm and the lower bridge arm are connected in series, and the two ends of the series connection are respectively connected to the two ends of the primary side of the high-frequency transformer, and the common end where the upper bridge arm and the lower bridge arm are connected is connected to the input power supply.

5. The hydrogen production circuit according to claim 4, characterized in that: The upper bridge arm and the lower bridge arm respectively include two switch tubes connected in series, and the conduction directions of the two switch tubes connected in series are opposite.

6. The hydrogen production circuit according to claim 1, characterized in that: The hydrogen production circuit further includes an input side filter circuit, and the input side filter circuit is connected to the input power supply and the rectifier matrix circuit.

7. The hydrogen production circuit according to claim 1, characterized in that: The hydrogen production circuit further includes an output-side rectifier circuit, which is connected to the secondary side of the high-frequency transformer and the electrolyzer.

8. The hydrogen production circuit according to claim 7, characterized in that: The hydrogen production circuit further includes an output side filter circuit, and the output side filter circuit is connected to the output side rectifier circuit and the electrolyzer.

9. A hydrogen production circuit control method, characterized in that: The hydrogen production circuit according to any one of claims 1 to 8 is implemented, comprising: Obtain driving power from input power; Splitting the driving electric energy into a plurality of vector parameters, and determining a duty cycle parameter corresponding to each of the vector parameters; The rectifier matrix circuit is controlled based on the duty cycle parameters.

10. A hydrogen production power source, characterized in that: The hydrogen production power supply includes an electrolyzer, an input power supply, a controller and a hydrogen production circuit as described in any one of claims 1 to 8, wherein the hydrogen production circuit connects the electrolyzer and the input power supply, and the controller connects the input power supply and the hydrogen production circuit, and is used to control the hydrogen production circuit to provide hydrogen production electricity to the electrolyzer based on the method described in claim 9, so that the electrolyzer produces hydrogen based on the hydrogen production electricity.

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