Hydrogen production power supply and hydrogen production power supply adjusting method

Abstract

The invention relates to a hydrogen production power supply, a hydrogen production power supply adjusting method and device, computer equipment, a computer readable storage medium and a computer program product, the hydrogen production power supply comprises a rectifier transformer, a voltage source converter, a rectifying circuit and a controller, the primary side of the rectifier transformer is used for being connected with a power grid, and the secondary side of the rectifier transformer is connected with the rectifying circuit; taps of the rectifier transformer are connected with the voltage source converter, the rectifier circuit is connected with the electrolytic bath, and the controller is connected with a secondary side of the rectifier transformer and the voltage source converter. A primary side of the rectifier transformer is used for receiving electric energy transmitted by a power grid, a secondary side of the rectifier transformer is used for outputting load electric energy to the rectifier circuit, and the controller controls the voltage source converter to output compensation electric energy to a tap of the rectifier transformer according to the load electric energy. Wherein the compensation electric energy is determined based on the load electric energy, and the compensation electric energy is used for suppressing harmonic waves of the load electric energy. By outputting compensation electric energy to offset harmonic waves in load electric energy, the stability of the hydrogen production power supply is improved.

Description

Technical Field

[0001] The present application relates to the field of hydrogen production technology, and in particular to a hydrogen production power supply, a hydrogen production power supply regulation method, an apparatus, a computer device, a computer-readable storage medium, and a computer program product. Background Art

[0002] With the development of renewable energy, hydrogen, as an efficient, clean, pollution-free, high-energy-density fuel, is widely used in industry, transportation, power generation, energy storage and other fields. The production methods of hydrogen are also updated with the development of science and technology. Among them, water electrolysis is a highly efficient, environmentally friendly and high-purity hydrogen production technology, which is widely used in the field of industrial hydrogen production.

[0003] In the traditional technology of hydrogen production by water electrolysis, a 6-pulse rectifier transformer is usually used in conjunction with a diode or thyristor to produce hydrogen. This method is widely used because of its simple structure and low engineering cost. However, this method will inject a large amount of harmonics into the power grid, affecting the operation of the power system. Although it can be iterated to use a 12-pulse rectifier transformer and a thyristor rectifier bridge for hydrogen production, the existence of harmonics cannot be avoided after iteration, and the defect of low stability caused by harmonics still exists. Summary of the invention

[0004] Based on this, it is necessary to provide a hydrogen production power supply, a hydrogen production power supply adjustment method, an apparatus, a computer device, a computer-readable storage medium and a computer program product that can reduce harmonics and improve stability in response to the above-mentioned technical problems.

[0005] In a first aspect, the present application provides a hydrogen production power supply, which includes a rectifier transformer, a voltage source converter, a rectifier circuit and a controller, wherein the primary side of the rectifier transformer is used to connect to a power grid, the secondary side of the rectifier transformer is connected to the rectifier circuit, the tap of the rectifier transformer is connected to the voltage source converter, the rectifier circuit is used to connect to an electrolyzer, and the controller is connected to the secondary side of the rectifier transformer and the voltage source converter;

[0006] The primary side of the rectifier transformer is used to receive the electric energy transmitted by the power grid, and the secondary side of the rectifier transformer is used to output load electric energy to the rectifier circuit. The controller controls the voltage source converter to output compensation electric energy to the tap of the rectifier transformer according to the load electric energy. The compensation electric energy is determined based on the load electric energy, and the compensation electric energy is used to suppress the harmonics of the load electric energy.

[0007] In one of the embodiments, the voltage source converter includes a bridge arm circuit and a terminal capacitor, the terminal capacitor is connected to a tap of the rectifier transformer through the bridge arm circuit, and the bridge arm circuit is connected to the controller.

[0008] In one embodiment, the bridge arm circuit includes an upper bridge switch tube and a lower bridge switch tube connected in series, the first end of the series connection is connected to the first end of the terminal capacitor, the second end of the series connection is connected to the second end of the terminal capacitor, the common end where the upper bridge switch tube and the lower bridge switch tube are connected is connected to the tap of the rectifier transformer, and the control ends of the upper bridge switch tube and the lower bridge switch tube are both connected to the controller.

[0009] In one embodiment, the hydrogen production power supply further includes a filter circuit, and the filter circuit is connected to the rectifier circuit and the electrolyzer.

[0010] In one embodiment, the hydrogen production power supply further includes a DC conversion device, and the DC conversion device is connected to the rectifier circuit and the electrolytic cell.

[0011] In a second aspect, the present application further provides a method for regulating a hydrogen production power supply, which is implemented based on the hydrogen production power supply described in the above embodiments, and includes:

[0012] Obtain load electric energy output by the rectifier transformer;

[0013] determining a compensation parameter based on the load power;

[0014] The voltage source converter is controlled to output compensation electric energy to the tap of the rectifier transformer according to the compensation parameter; the compensation parameter is matched with the compensation electric energy, and the compensation electric energy is used to suppress the harmonics of the load electric energy.

[0015] In one embodiment, determining the compensation parameter based on the load power includes:

[0016] transforming the load electric energy to determine the harmonic current component in the load electric energy;

[0017] The compensation parameter is determined according to the harmonic current component and the initial power of the voltage source converter.

[0018] In one embodiment, the transforming the load electric energy to determine the harmonic current component in the load electric energy includes:

[0019] Performing a Park transformation on the load electric energy to determine a fundamental current component in the load electric energy;

[0020] A harmonic current component within the load power is determined based on the load power and the fundamental current component.

[0021] In one embodiment, determining the compensation parameter according to the harmonic current component and the initial power of the voltage source converter comprises:

[0022] Determining a compensation parameter relationship of the voltage source converter based on the initial electric energy of the voltage source converter and the current relationship between the primary side, the secondary side and the tap of the rectifier transformer;

[0023] Substituting the harmonic current component into the compensation parameter relationship of the voltage source converter, the compensation parameter is determined.

[0024] In one embodiment, controlling the voltage source converter to output compensation electric energy to the tap of the rectifier transformer according to the compensation parameter includes:

[0025] Performing coordinate transformation on the compensation parameter to determine the component parameter corresponding to the compensation parameter;

[0026] generating a corresponding control signal according to the component parameters;

[0027] The voltage source converter is controlled to output the compensation power to the tap of the rectifier transformer based on the corresponding control signal.

[0028] In a third aspect, the present application also provides a hydrogen production power supply regulating device, comprising:

[0029] A detection module, used for obtaining load electric energy output by the rectifier transformer;

[0030] A calculation module, used for determining a compensation parameter based on the load power;

[0031] A control module is used to control the voltage source converter to output compensation electric energy to the tap of the rectifier transformer according to the compensation parameter; the compensation parameter is matched with the compensation electric energy, and the compensation electric energy is used to suppress the harmonics of the load electric energy.

[0032] In a fourth 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:

[0033] Obtain load electric energy output by the rectifier transformer;

[0034] determining a compensation parameter based on the load power;

[0035] The voltage source converter is controlled to output compensation electric energy to the tap of the rectifier transformer according to the compensation parameter; the compensation parameter is matched with the compensation electric energy, and the compensation electric energy is used to suppress the harmonics of the load electric energy.

[0036] In a fifth 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:

[0037] Obtain load electric energy output by the rectifier transformer;

[0038] determining a compensation parameter based on the load power;

[0039] The voltage source converter is controlled to output compensation electric energy to the tap of the rectifier transformer according to the compensation parameter; the compensation parameter is matched with the compensation electric energy, and the compensation electric energy is used to suppress the harmonics of the load electric energy.

[0040] In a sixth aspect, the present application further provides a computer program product, including a computer program, which implements the following steps when executed by a processor:

[0041] Obtain load electric energy output by the rectifier transformer;

[0042] determining a compensation parameter based on the load power;

[0043] The voltage source converter is controlled to output compensation electric energy to the tap of the rectifier transformer according to the compensation parameter; the compensation parameter is matched with the compensation electric energy, and the compensation electric energy is used to suppress the harmonics of the load electric energy.

[0044] The above-mentioned hydrogen production power supply, hydrogen production power supply adjustment method, device, computer equipment, computer readable storage medium and computer program product, the hydrogen production power supply includes a rectifier transformer, a voltage source converter, a rectifier circuit and a controller, the primary side of the rectifier transformer is used to connect to the power grid, the secondary side of the rectifier transformer is connected to the rectifier circuit, the tap of the rectifier transformer is connected to the voltage source converter, the rectifier circuit is used to connect to the electrolyzer, and the controller connects the secondary side of the rectifier transformer and the voltage source converter. The primary side of the rectifier transformer is used to receive the electric energy transmitted by the power grid, the secondary side of the rectifier transformer is used to output the load electric energy to the rectifier circuit, and the controller controls the voltage source converter to output the compensation electric energy to the tap of the rectifier transformer according to the load electric energy. Among them, the compensation electric energy is determined based on the load electric energy, and the compensation electric energy is used to suppress the harmonics of the load electric energy. The harmonics in the load electric energy are offset by the output of the compensation electric energy by the voltage source converter, thereby improving the stability of the hydrogen production power supply. BRIEF DESCRIPTION OF THE DRAWINGS

[0045] 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.

[0046] FIG1 is a structural block diagram of a hydrogen production power supply in one embodiment;

[0047] FIG2 is a circuit diagram of a hydrogen production power supply in one embodiment;

[0048] FIG3 is a schematic flow chart of a method for regulating a hydrogen production power source in one embodiment;

[0049] FIG4 is a schematic diagram of a flow chart of steps for determining compensation parameters based on load power in one embodiment;

[0050] FIG5 is a flow chart of the steps of transforming load electric energy and determining harmonic current components in the load electric energy in one embodiment;

[0051] FIG6 is a flow chart of a step of determining compensation parameters according to harmonic current components and initial power of a voltage source converter in one embodiment;

[0052] FIG7 is a flow chart of a step of controlling the voltage source converter to output compensation electric energy to the tap of the rectifier transformer according to the compensation parameter in one embodiment;

[0053] FIG8 is a structural block diagram of a hydrogen production power supply regulating device in one embodiment;

[0054] FIG. 9 is a diagram showing the internal structure of a computer device in one embodiment.

[0055] Description of reference numerals: rectifier transformer 1 , voltage source converter 2 , rectifier circuit 3 , filter circuit 4 , DC-DC converter 5 . DETAILED DESCRIPTION

[0056] 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.

[0057] 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.

[0058] 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.

[0059] 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.

[0060] 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.

[0061] As an efficient, clean, pollution-free, high-energy-density fuel, hydrogen is widely used in industry, transportation, power generation, energy storage and other fields. In recent years, with the increasing severity of the global energy crisis and environmental pollution problems, hydrogen, as an environmentally friendly renewable energy, has received more and more attention from the society for the development of hydrogen production technology. Among them, water electrolysis hydrogen production, as an efficient, environmentally friendly, and high-purity hydrogen production technology, has been widely used in the field of hydrogen production. The hydrogen production power supply is used to discharge the electrolyzer according to the electric energy of the connected power system, so that the electrolyzer releases hydrogen and completes the hydrogen production.

[0062] In the early stage of the development of hydrogen production power supply by electrolysis of water, a combination of 6-pulse rectifier transformer and diode / thyristor rectification method is usually used as a hydrogen production power supply to discharge hydrogen to the electrolyzer. Although this hydrogen production power supply has a simple structure and low engineering cost, it will inject a large amount of 6n±1 (n=1, 2, 3⋯) harmonics into the power grid, seriously affecting the normal and stable operation of the connected power system. In order to optimize the hydrogen production process, a structure combining 12-pulse rectifier transformer and thyristor rectifier bridge is used as a hydrogen production power supply. However, although this structure can reduce harmonic current to a certain extent, it still contains 12n±1 harmonics. In addition, compared with 6-pulse rectifier transformers, 12-pulse rectifier transformers have defects such as complex structure, high price, and large footprint. Therefore, there is still a lack of a hydrogen production power supply that can reduce harmonic generation and reduce the impact on the operation of the connected power system.

[0063] The present application provides a hydrogen production power supply, as shown in Figure 1, the hydrogen production power supply includes a rectifier transformer 1, a voltage source converter 2, a rectifier circuit 3 and a controller (not shown in the figure), the primary side of the rectifier transformer 1 is used to connect to the power grid, the secondary side of the rectifier transformer 1 is connected to the rectifier circuit 3, the tap of the rectifier transformer 1 is connected to the voltage source converter 2, the rectifier circuit 3 is used to connect to the electrolyzer, and the controller is connected to the secondary side of the rectifier transformer 1 and the voltage source converter 2.

[0064] The primary side of the rectifier transformer 1 is used to receive electric energy transmitted by the power grid, and the secondary side of the rectifier transformer 1 is used to output load electric energy to the rectifier circuit 3. The controller controls the voltage source converter 2 to output compensation electric energy to the tap of the rectifier transformer 1 according to the load electric energy. The compensation electric energy is determined based on the load electric energy, and the compensation electric energy is used to suppress the harmonics of the load electric energy.

[0065] The power grid is an electric power system used to provide power grid energy to the hydrogen production power source, such as a three-phase power grid, which can transmit three-phase power to the rectifier transformer 1. The rectifier transformer 1 is a transformer that can condition the power grid energy, and outputs load power by changing the voltage parameters in the power grid energy. Specifically, the power grid is connected to the primary side of the rectifier transformer 1, and the power grid energy is transmitted to the primary side of the rectifier transformer 1. The rectifier transformer 1 transforms the power grid energy (usually boosts the voltage), and outputs the transformed power from the secondary side of the rectifier transformer 1, that is, the load power.

[0066] Furthermore, the rectifier circuit 3 is connected to the secondary side of the rectifier transformer 1, receives and rectifies the load power, and transmits the rectified load power to the electrolytic cell, which is used to generate hydrogen. The electrolytic cell contains liquid, usually water, and metal pole pieces are provided on the inner wall of the electrolytic cell on both sides of the liquid. The rectifier circuit 3 connects the two metal pole pieces, transmits the rectified load power to the water through the metal pole pieces, and electrolyzes the water to produce hydrogen.

[0067] The voltage source converter 2 is connected to the rectifier transformer 1, and outputs compensation electric energy of different sizes to the secondary side of the rectifier transformer 1 to offset the harmonics of the load electric energy, thereby reducing the impact of the harmonics of the load electric energy on the power grid. Specifically, a tap is also provided on the winding of the rectifier transformer 1. Since the rectifier transformer 1 is generally used for boosting in the hydrogen production power supply, the tap can be provided on the winding on the high-voltage side, that is, a tap is provided between the windings on the secondary side of the rectifier transformer 1. Optionally, during the design and construction period of the rectifier transformer 1, the position of the tap can be set according to demand to facilitate the design of the voltage source converter 2.

[0068] The controller is connected to the secondary side of the rectifier transformer 1 to obtain load power. At the same time, the controller is also connected to the voltage source converter 2 to control the voltage source converter 2. That is, the controller controls the voltage source converter 2 based on the load power output by the secondary side of the rectifier transformer 1, so that the voltage source converter 2 outputs compensation power, and the compensation power is used to suppress harmonics in the load power.

[0069] Optionally, the controller may be a PLC, or a control chip connected to the PLC, such as a DSP, ARM, CPLD or other chip.

[0070] In this embodiment, the hydrogen production power supply includes a rectifier transformer 1, a voltage source converter 2, a rectifier circuit 3 and a controller. The primary side of the rectifier transformer 1 is used to connect to the power grid, the secondary side of the rectifier transformer 1 is connected to the rectifier circuit 3, the tap of the rectifier transformer 1 is connected to the voltage source converter 2, the rectifier circuit 3 is used to connect to the electrolyzer, and the controller connects the secondary side of the rectifier transformer 1 and the voltage source converter 2. The primary side of the rectifier transformer 1 is used to receive the electric energy transmitted by the power grid, the secondary side of the rectifier transformer 1 is used to output the load electric energy to the rectifier circuit 3, and the controller controls the voltage source converter 2 to output the compensation electric energy to the tap of the rectifier transformer 1 according to the load electric energy. Among them, the compensation electric energy is determined based on the load electric energy, and the compensation electric energy is used to suppress the harmonics of the load electric energy. The harmonics in the load electric energy are offset by the output of the compensation electric energy by the voltage source converter 2, thereby improving the stability of the hydrogen production power supply.

[0071] In one exemplary embodiment, the voltage source converter 2 includes a bridge arm circuit and a terminal capacitor, the terminal capacitor is connected to a tap of the rectifier transformer 1 through the bridge arm circuit, and the bridge arm circuit is connected to a controller.

[0072] Specifically, the bridge arm circuit is controlled by a controller. When the bridge arm circuit is in different working states, the voltage source converter 2 can output different compensation electric energies. The terminal capacitor can isolate the currents in different directions on the bridge arm circuit on the one hand, and on the other hand, it can accumulate the electric energy transmitted by the tap of the rectifier transformer 1, and release the electric energy as a power source when the bridge arm circuit needs to output compensation electric energy.

[0073] Optionally, when the power grid is a three-phase power grid, the number of the bridge arm circuits may be three, and the three bridge arm circuits are arranged in parallel and are all connected to the terminal capacitor and the tap of the rectifier transformer 1 .

[0074] In this embodiment, the bridge arm circuit can adjust the direction and size of the current flowing through by on-off control. A combination of multiple bridge arm circuits can realize the output of various compensation electric energies. Under the control of the controller, more accurate compensation electric energy output can be achieved, ensuring the accuracy of the compensation electric energy, which is conducive to maintaining the stability of the hydrogen production power supply.

[0075] Furthermore, in one exemplary embodiment, the bridge arm circuit includes an upper bridge switch tube and a lower bridge switch tube connected in series, the first end of the series connection is connected to the first end of the terminal capacitor, the second end of the series connection is connected to the second end of the terminal capacitor, the common end where the upper bridge switch tube and the lower bridge switch tube are connected is connected to the tap of the rectifier transformer 1, and the control ends of the upper bridge switch tube and the lower bridge switch tube are both connected to the controller.

[0076] Specifically, the input end of the upper bridge switch tube is connected to the tap of the rectifier transformer 1 and the output end of the lower bridge switch tube, the output end of the upper bridge switch tube is connected to the first end of the terminal capacitor, the input end of the lower bridge switch tube is connected to the second end of the terminal capacitor, and the control ends of the upper bridge switch tube and the lower bridge switch tube are connected to the controller. The controller can control the upper bridge switch tube and the lower bridge switch tube according to parameters such as the size of the load power and adjust the output compensation power.

[0077] Exemplarily, the number of bridge arm circuits can be one or three. As shown in FIG2 , the number of bridge arm circuits is three. The upper bridge switch tube of the first bridge arm circuit is switch tube VT1, the lower bridge switch tube of the first bridge arm circuit is switch tube VT2, the upper bridge switch tube of the second bridge arm circuit is switch tube VT3, the lower bridge switch tube of the second bridge arm circuit is switch tube VT4, the upper bridge switch tube of the third bridge arm circuit is switch tube VT5, and the lower bridge switch tube of the third bridge arm circuit is switch tube VT6. The output end of each upper bridge switch tube is connected to the terminal capacitor C dc The first end of each upper bridge switch tube is connected to the tap of the voltage source converter 2, and is respectively connected to the output end of the corresponding lower bridge switch tube, and the input end of each lower bridge switch tube is connected to the terminal capacitor C dc The second end of each switch tube is connected to the controller. Each switch tube is an NPN triode.

[0078] In this embodiment, through the cooperation of the upper bridge switch tube and the lower bridge switch tube, the controller can adjust the direction and magnitude of the current so that the current output by the bridge arm circuit meets the demand, thereby making the compensation current output accurate and stable, maintaining the stability of the hydrogen production power supply, and reducing harmonic interference.

[0079] In one exemplary embodiment, as shown in FIG. 2 , the hydrogen production power supply further includes a filter circuit 4 , and the filter circuit 4 is connected to the rectifier circuit 3 and the electrolyzer.

[0080] Specifically, the filter circuit 4 is disposed between the rectifier circuit 3 and the electrolytic cell, and can filter the rectified load electric energy and output it to the electrolytic cell. As shown in FIG2 , the filter circuit 4 includes a filter inductor L d And filter capacitor C d , filter inductor L d The first end is connected to the rectifier circuit 3, the filter inductor L dThe second end is connected to the first electrode of the electrolytic cell, and the filter capacitor C d The first end of the filter inductor L d The second end of the filter capacitor C d The second end is connected to the second electrode of the electrolytic cell.

[0081] The rectifier circuit 3 may be a rectifier circuit 3 composed of diodes, and may be a bridge rectifier circuit 3 or other circuit structures capable of rectification. As shown in FIG2 , the rectifier circuit 3 is a diode rectifier circuit, and the conduction direction of the diode is toward the filter inductor L d The first end of the filter inductor L d The first end of the filter capacitor C is connected to the end of the diode in the diode rectifier circuit. d The second end is connected to a cut-off end of a diode in the diode rectifier circuit.

[0082] In this embodiment, by setting the filter circuit 4, the load electric energy for hydrogen production can be filtered, the interference of clutter can be reduced, and the stability of the hydrogen production process and the efficiency of hydrogen production can be guaranteed.

[0083] In one embodiment, the hydrogen production power supply further includes a DC conversion device, which is connected to the rectifier circuit 3 and the electrolytic cell.

[0084] Specifically, the DC conversion device can convert the rectified load electric energy. After the load electric energy is rectified by the rectifier circuit 3, it is DC. The DC conversion device can adjust the voltage of the DC power and change the voltage of the DC power. In this embodiment, the DC conversion device can boost or buck the load electric energy according to actual needs.

[0085] Furthermore, the controller may be connected to the DC conversion device, and the controller controls the working state of the DC conversion device, thereby controlling whether the rectified load electric energy is stepped up or stepped down in the DC conversion device.

[0086] Optionally, as shown in Figure 2, the DC conversion device can be a DC-DC converter 5, which can convert a DC input voltage into a DC output voltage with different voltage levels, which can be to convert a high voltage into a low voltage, or to convert a low voltage into a high voltage. It can output electric energy at different voltage levels under the control of a controller to achieve hydrogen production at different rates for the electrolyzer.

[0087] In this embodiment, the DC conversion device can adjust the voltage value according to the control of the controller, and can provide electrical energy of different voltages to meet the hydrogen production needs of the electrolyzer, so that the hydrogen production rate is variable and can meet different hydrogen production needs.

[0088] In one embodiment, an inductive inductor is further provided between the voltage source converter 2 and the tap of the rectifier transformer 1, and the voltage source converter 2 is connected to the tap of the rectifier transformer 1 through the inductive inductor. The number of the inductive inductors matches the number of the bridge arm circuits in the voltage source converter 2, that is, when the power grid is a three-phase power grid, the number of the bridge arm circuits in the voltage source converter 2 is three, and the number of the inductive inductors is three.

[0089] As shown in FIG2 , the inductive inductor is L, and the number is three, which are respectively arranged at the common end where the upper bridge switch tube and the lower bridge switch tube are connected in each bridge arm circuit, and connected to the tap of the rectifier transformer 1. In this embodiment, the inductive inductor can protect the voltage source converter 2 by arranging it, and can also be used to stabilize the voltage and current, thereby improving the reliability of the hydrogen production power supply.

[0090] In one embodiment, the hydrogen production power supply may further include a heat sink, which is disposed in the voltage source converter 2, specifically in the switch tube in the bridge arm circuit of the voltage source converter 2, for cooling the switch tube. The heat sink may cool the switch tube by air cooling or water cooling. In this embodiment, the heat sink can dissipate heat and cool the area in the hydrogen production power supply where heat is easily accumulated, thereby avoiding damage to the circuit in the hydrogen production power supply due to excessive temperature, reducing the probability of failure of the switch tube, and helping to improve the reliability of the hydrogen production power supply.

[0091] Based on the same technical concept, in an exemplary embodiment, as shown in FIG. 3 , a hydrogen production power supply regulation method is provided, which is described by taking the method applied to a controller of a hydrogen production power supply as an example, and includes the following steps 202 to 206 .

[0092] Step 202, obtaining load electric energy output by the rectifier transformer.

[0093] Among them, the rectifier transformer is a component in the hydrogen production power supply, which can generate load power on the secondary side according to the grid power output by the grid. It has been recorded above and will not be repeated here. Optionally, the controller is connected to the secondary side of the rectifier transformer and can obtain the load power output by the rectifier transformer. At this time, the load power includes harmonics, which need to be removed.

[0094] Step 204: determining compensation parameters based on the load power.

[0095] Specifically, after the controller is connected to the rectifier transformer and obtains the load electric energy output by the rectifier transformer, it can determine the compensation parameters in combination with the component parameters of the hydrogen production power supply and the harmonics that need to be compensated in the load electric energy. The compensation parameters correspond to the compensation electric energy output by the voltage source converter for compensating the harmonics in the load electric energy, and can be regarded as the parameters of the compensation electric energy obtained by the controller calculation. It should be noted that in this step, the compensation parameters are only obtained by calculation, and the compensation electric energy cannot be directly output.

[0096] Step 206 , controlling the voltage source converter to output the compensation electric energy to the tap of the rectifier transformer according to the compensation parameter.

[0097] Among them, the compensation parameter matches the compensation electric energy, and the compensation electric energy is used to suppress the harmonics of the load electric energy. Since the compensation parameter is calculated based on the load electric energy, the compensation electric energy obtained according to the compensation parameter corresponds to the harmonic current component in the load electric energy. When the controller controls the voltage source converter to output the compensation electric energy to the tap of the rectifier transformer, the load electric energy generated by the secondary side of the rectifier transformer can be neutralized, specifically suppressing the harmonics in the load electric energy and preventing the harmonics of the load current from affecting the operation stability of the power grid in the reverse direction.

[0098] Specifically, after calculating the compensation parameters, the controller controls the working state of the voltage source converter according to the compensation parameters. When the voltage source converter includes a bridge arm circuit, the controller controls the working state of the bridge arm circuit; when the voltage source converter further includes an upper bridge switch tube and a lower bridge switch tube, the controller connects the control end of the upper bridge switch tube and the control end of the lower bridge switch tube; when the number of bridge arm circuits included in the voltage source converter is more than two, and the bridge arm circuit includes an upper bridge switch tube and a lower bridge switch tube, the control end can be understood to be the control end of each upper bridge switch tube and the control end of each lower bridge switch tube. The controller adjusts the electric energy output by the voltage source converter by controlling the working state of the voltage source converter, such as controlling the conduction degree or the open and close state of the upper bridge switch tube and the lower bridge switch tube. The controller can control the control combination of the control ends of multiple switch tubes so that the voltage source converter can output the compensation electric energy corresponding to the compensation parameters obtained by calculation. The compensation current in the compensation electric energy is the same as the harmonic current component in the load electric energy, and the harmonics of the load electric energy can be suppressed.

[0099] In this embodiment, the load power outputted by the rectifier transformer is obtained, compensation parameters are determined based on the load power, and the voltage source converter is controlled to output the compensation power to the tap of the rectifier transformer according to the compensation parameters. The compensation parameters are calculated based on the load power, and the voltage source converter is controlled to output the compensation power based on the compensation parameters, so that the harmonics of the compensation power and the load power are offset accordingly, thereby achieving harmonic suppression.

[0100] The step of determining the compensation parameter based on the load power is not limited, and the compensation parameter corresponding to the load power can be directly obtained according to the load power, or the compensation parameter can be obtained by combining other data. In an exemplary embodiment, as shown in FIG4 , step 204 includes steps 302 to 304. Among them:

[0101] Step 302: transform the load electric energy to determine the harmonic current components in the load electric energy.

[0102] Specifically, when the controller obtains the load electric energy, it can obtain the phase of the voltage of the load electric energy through a phase-locked loop. Based on the phase of the voltage of the load electric energy and the current of the load electric energy, it is processed by calculation, and the coordinate axis is transformed to divide the load electric energy into two components, namely the harmonic current component and the fundamental current component. Among them, the harmonic current component is the harmonic interference that needs to be suppressed in the load electric energy. Then the controller can calculate the compensation parameters according to the harmonic current component in the determined load electric energy.

[0103] Further, in an exemplary embodiment, as shown in FIG. 5 , step 302 includes steps 402 to 404 .

[0104] Step 402: Perform Park transformation on the load electric energy to determine the fundamental current component in the load electric energy.

[0105] Specifically, after obtaining the phase of the voltage of the load power, the controller can perform Park transformation on the current of the load power, and then perform Park inverse transformation again to obtain the fundamental current component in the load power. Furthermore, after the controller performs Park transformation on the current of the load power, it can also perform Park transformation after filtering through a low-pass filter LPF. The accuracy of the component conversion process is improved after filtering by the filter, ensuring the accuracy of the regulation of the hydrogen production power supply.

[0106] Step 404: determine the harmonic current component in the load power based on the load power and the fundamental current component.

[0107] After obtaining the fundamental current component, the controller can subtract the fundamental current component from the load current in the load power to calculate the harmonic current component of the load power. The controller can convert and calculate the compensation parameters based on the harmonic current component, and use them to control the voltage source converter to output the compensation power.

[0108] In this embodiment, the load electric energy is transformed and analyzed to calculate the harmonic current components so that the voltage source converter can output the corresponding compensation electric energy and suppress the harmonics in the load electric energy, which is beneficial to improve the accuracy of harmonic suppression and ensure the stable operation of the hydrogen production power supply.

[0109] Step 304: determining compensation parameters according to the harmonic current components and the initial power of the voltage source converter.

[0110] Among them, the initial electric energy of the voltage source converter refers to the electric energy of the voltage source converter itself, including the phase of the voltage of the voltage source converter, etc. The voltage source converter may be connected to a separate power supply, or the voltage source converter may obtain electric energy from the tap of the rectifier transformer, which is not limited in the present embodiment.

[0111] Specifically, after calculating the harmonic current components, the controller can calculate the basic parameters of the voltage source converter according to the initial electric energy of the voltage source converter. On the basis of the basic parameters, combined with the size of the harmonic current components, a parameter that can offset the harmonic current components is adjusted. This current can be used as a compensation parameter.

[0112] Further, in an exemplary embodiment, as shown in FIG. 6 , step 304 includes steps 502 to 504 .

[0113] Step 502, determining a compensation parameter relationship of the voltage source converter based on the initial power of the voltage source converter and the current relationship between the primary side, the secondary side and the tap of the rectifier transformer.

[0114] Specifically, since the rectifier transformer is a standard transformer, for example, the rectifier transformer in Figure 2 is a three-phase transformer, a relationship can be established based on the current principle between the primary side, secondary side and taps of the rectifier transformer, and based on the initial electric energy of the voltage source converter as the electric energy of the tap of the rectifier transformer to participate in the establishment of the relationship, the compensation parameter relationship of the voltage source converter for the load electric energy can be constructed.

[0115] Step 504: Substitute the harmonic current component into the compensation parameter relationship of the voltage source converter to determine the compensation parameter.

[0116] Substituting the calculated harmonic current components into the compensation parameter relationship of the voltage source converter and operating the compensation parameter relationship, the compensation parameters of the voltage source converter can be determined.

[0117] In order to explain the above steps more clearly, the following is an explanation in conjunction with the hydrogen production power supply shown in FIG. 2 .

[0118] As shown in Figure 2, the three-phase voltages of the power grid are U A , U B , U C The corresponding three-phase currents are i Sa 、i Sb 、i Sc The three-phase currents on the load side (that is, the load current in the load energy) are i La 、i Lb 、i Lc The three-phase voltages are u Lab 、u Lac 、u Lbc The turns of the primary and secondary windings of the rectifier transformer are N1 and N2 respectively, and the three-phase voltages of the voltage source converter are u Ta 、u Tb 、u Tc , the three-phase currents of the voltage source converter are i Ca、i Cb 、i Cc The position of the tap is shown in the figure. The turns ratio of the windings on both sides of the tap is n:1. The currents of the secondary windings include i k11 、i k12 、i k21 、i k22 、i k31 、i k32 The corresponding positions and flow directions of each current are marked in the figure.

[0119] Assuming that only the electrolyzer of the load is connected and the voltage source converter is not connected, the hydrogen production power supply i can be obtained. Cx =0, where x=a, b, c. Then according to Kirchhoff's current law, we can get:

[0120] (1)

[0121] In the formula, i k1 for i k11 and i k12 The sum of i k2 for i k21 and i k22 The sum of i k1 for i k31 and i k32 sum.

[0122] According to formula (1), we can get the following formula:

[0123] (2)

[0124] Ignoring the excitation current, the current relationship between the primary and secondary sides of the transformer can be obtained as:

[0125] (3)

[0126] By combining equations (2) and (3), we can get the relationship between the current on the grid side and the current on the load side:

[0127] (4)

[0128] Assuming that only the voltage source converter is connected and the load electrolyzer is not connected, the i in the hydrogen production power supply can be obtained. Lx = 0, where x = a, b, c. Then, as in the above Kirchhoff's current law and the operation of equations (1) to (4), the relationship between the current on the grid side and the compensation current (compensation parameter) of the voltage source converter can be obtained as follows:

[0129] (5)

[0130] According to the superposition theorem, by simplifying the above formula (5), we can get:

[0131] (6)

[0132] And simplify formula (6) into the following form:

[0133] (7)

[0134] In the above formula, i Lxf and i Lxh The load current i Lx The fundamental and harmonic current components of Laf is the load current i La The fundamental current component, i Lah is the load current i La Harmonic current components; i Lbf is the load current i Lb The fundamental current component, i Lbh is the load current i Lb Harmonic current components.

[0135] To eliminate harmonics, it is necessary to control the i in the voltage source converter. Ca and i Cb Satisfy the following formula:

[0136] (8)

[0137] In the case of equation (8), the harmonic current in the grid-side current is eliminated, leaving only the fundamental current component:

[0138] (9)

[0139] According to formula (8), the compensation current of the voltage source converter can be obtained as:

[0140] (10)

[0141] Therefore, as long as the current of the voltage source converter is controlled to be output as the value calculated by equation (10), the harmonic component current in the load power can be suppressed and the negative impact caused by its flow into the power grid can be reduced.

[0142] In this embodiment, the relationship between the current in the grid power and the load power is obtained by calculating the above formulas, and the fundamental current component of the load current can be obtained after Park transformation and Park inverse transformation, and the harmonic current component can be obtained by subtracting the fundamental current component from the load current in the load power. Then, the compensation current of the voltage source converter, that is, the compensation parameter corresponding to the compensation power, is calculated according to formula (10).

[0143] In an exemplary embodiment, as shown in FIG. 7 , step 206 includes steps 602 to 606 .

[0144] Step 602: Perform coordinate transformation on the compensation parameter to determine the component parameter corresponding to the compensation parameter.

[0145] Specifically, after obtaining the compensation parameters, the controller can perform coordinate transformation on the compensation parameters, transform the current parameters in the compensation parameters from three-phase coordinates to two-phase rotating coordinates, and obtain component parameters corresponding to the compensation parameters. The component parameters include but are not limited to the d-axis component parameters and q-axis component parameters of the current parameters in the compensation parameters, wherein the d-axis component parameters can be marked as i * Cd , the q-axis component parameter can be marked as i * Cq .

[0146] Step 604: Generate a corresponding control signal according to the component parameters.

[0147] After obtaining the component parameters corresponding to the compensation parameters, the controller can generate corresponding control signals according to the component parameters. Each component parameter can generate a control signal separately, or all component parameters can generate a control signal together. When the component parameters include the d-axis component parameters and q-axis component parameters of the current parameters in the compensation parameters, the controller can use the d-axis component parameters and the q-axis component parameters as input references, and obtain the state signal of the switch tube in the voltage source converter after PWM modulation of the above two component parameters.

[0148] That is to say, by adjusting the switch tube in the voltage source converter to the state corresponding to the above state signal, the voltage source converter can be controlled to output electric energy corresponding to the d-axis component parameter and the q-axis component parameter, that is, the compensation electric energy that can suppress the load electric energy. Among them, the signal for controlling the state of the switch tube in the voltage source converter based on the d-axis component parameter and the q-axis component parameter is a corresponding control signal generated according to the component parameter, and the controller generates the corresponding control signal based on the component parameter, which can control the working state of the voltage source converter.

[0149] Step 606 , controlling the voltage source converter to output the compensation power to the tap of the rectifier transformer based on the corresponding control signal.

[0150] Specifically, the controller controls the voltage source converter based on the corresponding control signal, specifically controls the switch tube in the bridge arm circuit of the voltage source converter. The controller is connected to the switch tubes in the voltage source converter, including but not limited to the upper bridge switch tube and the lower bridge switch tube, specifically connected to the control end of each switch tube, and the controller controls the control end of each switch tube according to the corresponding control signal obtained by calculation, adjusts the working state of each switch tube, and makes the electric energy output by the voltage source converter be the compensation electric energy.

[0151] In this embodiment, by controlling the working state of the switch tube of the voltage source converter and adjusting the electric energy output by the voltage source transformer to the compensation electric energy, the harmonics in the load electric energy of the rectifier transformer can be offset, thereby reducing the oscillation of the electric energy in the power grid affected by the harmonics, thereby ensuring the stable operation of the hydrogen production power supply.

[0152] In order to better understand the above solution, in combination with the application scenario shown in FIG2 , a detailed explanation is given below in combination with a specific embodiment.

[0153] In one embodiment, as shown in FIG2 , the hydrogen production power supply includes a rectifier transformer, a voltage source converter, a rectifier circuit, a filter circuit, a DC conversion device, and a controller, wherein the rectifier transformer is a three-phase transformer, the rectifier circuit is a diode rectifier circuit, the filter circuit is an LC filter circuit, and the DC conversion device is a DC-DC converter. The connection relationship and structure of each component have been described above and will not be repeated here.

[0154] The controller is connected to the secondary side of the rectifier transformer to obtain load power. The controller is also connected to the control end of each switch tube of the voltage source converter to control the output of the voltage source converter so that its output compensation power corresponds to the harmonics in the load power and suppresses the harmonics. Based on the calculation ideas of equations (1) to (10), the compensation parameters of the compensation power that the voltage source converter should output are determined, and then the control signal of the output switch tube is modulated by PWM to control the duty cycle of each switch tube in the voltage source converter so that the voltage source converter outputs compensation power.

[0155] First, the controller uses a phase-locked loop to obtain the phase of the voltage on the load side and the voltage of the voltage source converter. La 、i Lb 、i Lc After Park transformation, it is filtered by a low-pass filter LPF and then inversely transformed by Park to obtain the fundamental component of the load current.

[0156] Then, the harmonic components of the load current can be obtained by subtracting the fundamental current component from the load current. According to formula (10), the compensation current of the voltage source converter can be obtained. Then, the three-phase coordinates are transformed into two-phase rotating coordinates, and the d and q axis components i of the reference compensation current can be obtained.* Cd and i * Cq .

[0157] Finally, the d-axis and q-axis components i of the reference compensation current are * Cd and i * Cq As the input of the passive controller, the switching tube signal of the voltage source converter is finally obtained after PWM modulation.

[0158] The above hydrogen production power supplies all establish communication with the PLC, and the PLC can also adjust the duty cycle of the DC-DC converter of the hydrogen production power supply by issuing instructions, thereby achieving control of the output voltage and current of the electrolyzer.

[0159] In this embodiment, by integrating the voltage source converter into the tap of the rectifier transformer and then utilizing the magnetic potential balance principle between the transformer windings, the harmonic current generated in the hydrogen production power supply process can be effectively suppressed, thereby improving the power quality of the hydrogen production power supply and reducing the impact on the power grid. It has the characteristics of high stability, low cost, reliable operation, and small footprint.

[0160] 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.

[0161] Based on the same inventive concept, the embodiment of the present application also provides a hydrogen production power supply regulating device for implementing the above-mentioned hydrogen production power supply regulating method. The implementation scheme for solving the problem provided by the device is similar to the implementation scheme recorded in the above-mentioned method, so the specific limitations in one or more embodiments of the hydrogen production power supply regulating device provided below can refer to the limitations of the hydrogen production power supply regulating method above, and will not be repeated here.

[0162] In an exemplary embodiment, as shown in FIG8 , a hydrogen production power supply regulating device is provided, including: a detection module 820, a calculation module 840 and a control module 860, wherein:

[0163] The detection module 820 is used to obtain the load electric energy output by the rectifier transformer;

[0164] A calculation module 840, configured to determine a compensation parameter based on load power;

[0165] The control module 860 is used to control the voltage source converter to output compensation electric energy to the tap of the rectifier transformer according to the compensation parameters; the compensation parameters are matched with the compensation electric energy, and the compensation electric energy is used to suppress the harmonics of the load electric energy.

[0166] In one embodiment, the operation module 840 is further used to transform the load power, determine the harmonic current components in the load power, and determine the compensation parameters according to the harmonic current components and the initial power of the voltage source converter.

[0167] In one embodiment, the operation module 840 is further used to perform Park transformation on the load electric energy, determine the fundamental current component in the load electric energy, and determine the harmonic current component in the load electric energy based on the load electric energy and the fundamental current component.

[0168] In one embodiment, the operation module 840 is further used to determine the compensation parameter relationship of the voltage source converter based on the initial power of the voltage source converter and the current relationship between the primary side, the secondary side and the tap of the rectifier transformer. The harmonic current component is substituted into the compensation parameter relationship of the voltage source converter to determine the compensation parameter.

[0169] In one embodiment, the control module 860 is further used to perform coordinate transformation on the compensation parameter, determine the component parameter corresponding to the compensation parameter, generate a corresponding control signal according to the component parameter, and control the voltage source converter to output the compensation electric energy to the tap of the rectifier transformer based on the corresponding control signal.

[0170] Each module in the above-mentioned hydrogen production power supply regulating device can be implemented in whole or in part by software, hardware and a combination thereof. Each of the above-mentioned modules can be embedded in or independent of the processor in the computer device in the form of hardware, or can be stored in the memory of the computer device in the form of software, so that the processor can call and execute the corresponding operations of each of the above modules.

[0171] In an exemplary embodiment, a computer device is provided, which may be a terminal, and its internal structure diagram may be shown in FIG9. 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 can 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 power supply adjustment 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.

[0172] Those skilled in the art will understand that the structure shown in FIG. 9 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.

[0173] 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:

[0174] Obtain load electric energy output by the rectifier transformer;

[0175] Determining compensation parameters based on load power;

[0176] The voltage source converter is controlled to output compensation electric energy to the tap of the rectifier transformer according to the compensation parameter; the compensation parameter is matched with the compensation electric energy, and the compensation electric energy is used to suppress the harmonics of the load electric energy.

[0177] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0178] The load electric energy is transformed to determine the harmonic current components in the load electric energy, and the compensation parameters are determined according to the harmonic current components and the initial electric energy of the voltage source converter.

[0179] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0180] The load electric energy is subjected to Park transformation to determine the fundamental current component in the load electric energy, and the harmonic current component in the load electric energy is determined based on the load electric energy and the fundamental current component.

[0181] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0182] Based on the initial power of the voltage source converter and the current relationship between the primary side, the secondary side and the tap of the rectifier transformer, the compensation parameter relationship of the voltage source converter is determined. The harmonic current component is substituted into the compensation parameter relationship of the voltage source converter to determine the compensation parameter.

[0183] In one embodiment, when the processor executes the computer program, the processor further implements the following steps:

[0184] The compensation parameters are coordinate transformed to determine the component parameters corresponding to the compensation parameters. A corresponding control signal is generated according to the component parameters, and based on the corresponding control signal, the voltage source converter is controlled to output the compensation electric energy to the tap of the rectifier transformer.

[0185] 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:

[0186] Obtain load electric energy output by the rectifier transformer;

[0187] Determining compensation parameters based on load power;

[0188] The voltage source converter is controlled to output compensation electric energy to the tap of the rectifier transformer according to the compensation parameter; the compensation parameter is matched with the compensation electric energy, and the compensation electric energy is used to suppress the harmonics of the load electric energy.

[0189] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0190] The load electric energy is transformed to determine the harmonic current components in the load electric energy, and the compensation parameters are determined according to the harmonic current components and the initial electric energy of the voltage source converter.

[0191] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0192] The load electric energy is subjected to Park transformation to determine the fundamental current component in the load electric energy, and the harmonic current component in the load electric energy is determined based on the load electric energy and the fundamental current component.

[0193] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0194] Based on the initial power of the voltage source converter and the current relationship between the primary side, the secondary side and the tap of the rectifier transformer, the compensation parameter relationship of the voltage source converter is determined. The harmonic current component is substituted into the compensation parameter relationship of the voltage source converter to determine the compensation parameter.

[0195] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0196] The compensation parameters are coordinate transformed to determine the component parameters corresponding to the compensation parameters. A corresponding control signal is generated according to the component parameters, and based on the corresponding control signal, the voltage source converter is controlled to output the compensation electric energy to the tap of the rectifier transformer.

[0197] In one embodiment, a computer program product is provided, comprising a computer program, which, when executed by a processor, implements the following steps:

[0198] Obtain load electric energy output by the rectifier transformer;

[0199] Determining compensation parameters based on load power;

[0200] The voltage source converter is controlled to output compensation electric energy to the tap of the rectifier transformer according to the compensation parameter; the compensation parameter is matched with the compensation electric energy, and the compensation electric energy is used to suppress the harmonics of the load electric energy.

[0201] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0202] The load electric energy is transformed to determine the harmonic current components in the load electric energy, and the compensation parameters are determined according to the harmonic current components and the initial electric energy of the voltage source converter.

[0203] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0204] The load electric energy is subjected to Park transformation to determine the fundamental current component in the load electric energy, and the harmonic current component in the load electric energy is determined based on the load electric energy and the fundamental current component.

[0205] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0206] Based on the initial power of the voltage source converter and the current relationship between the primary side, the secondary side and the tap of the rectifier transformer, the compensation parameter relationship of the voltage source converter is determined. The harmonic current component is substituted into the compensation parameter relationship of the voltage source converter to determine the compensation parameter.

[0207] In one embodiment, when the computer program is executed by a processor, the following steps are also implemented:

[0208] The compensation parameters are coordinate transformed to determine the component parameters corresponding to the compensation parameters. A corresponding control signal is generated according to the component parameters, and based on the corresponding control signal, the voltage source converter is controlled to output the compensation electric energy to the tap of the rectifier transformer.

[0209] 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.

[0210] 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.

[0211] 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 power source, characterized in that: The hydrogen production power supply includes a rectifier transformer, a voltage source converter, a rectifier circuit and a controller, the primary side of the rectifier transformer is used to connect to the power grid, the secondary side of the rectifier transformer is connected to the rectifier circuit, the tap of the rectifier transformer is connected to the voltage source converter, the rectifier circuit is used to connect to the electrolyzer, and the controller is connected to the secondary side of the rectifier transformer and the voltage source converter; The primary side of the rectifier transformer is used to receive the electric energy transmitted by the power grid, and the secondary side of the rectifier transformer is used to output load electric energy to the rectifier circuit. The controller controls the voltage source converter to output compensation electric energy to the tap of the rectifier transformer according to the load electric energy. The compensation electric energy is determined based on the load electric energy, and the compensation electric energy is used to suppress the harmonics of the load electric energy.

2. The hydrogen production power supply according to claim 1, characterized in that: The voltage source converter includes a bridge arm circuit and a terminal capacitor, the terminal capacitor is connected to the tap of the rectifier transformer through the bridge arm circuit, and the bridge arm circuit is connected to the controller.

3. The hydrogen production power source according to claim 2, characterized in that: The bridge arm circuit includes an upper bridge switch tube and a lower bridge switch tube connected in series, wherein the first end of the series connection is connected to the first end of the terminal capacitor, and the second end of the series connection is connected to the second end of the terminal capacitor, the common end where the upper bridge switch tube and the lower bridge switch tube are connected is connected to the tap of the rectifier transformer, and the control ends of the upper bridge switch tube and the lower bridge switch tube are both connected to the controller.

4. The hydrogen production power supply according to claim 1, characterized in that: The hydrogen production power supply further includes a filter circuit, and the filter circuit is connected to the rectifier circuit and the electrolyzer.

5. The hydrogen production power source according to claim 1, characterized in that: The hydrogen production power supply further includes a DC conversion device, which is connected to the rectifier circuit and the electrolyzer.

6. A method for regulating hydrogen production power supply, characterized in that: The method is implemented based on the hydrogen production power supply according to any one of claims 1 to 5, comprising: Obtain load electric energy output by the rectifier transformer; determining a compensation parameter based on the load power; The voltage source converter is controlled to output compensation electric energy to the tap of the rectifier transformer according to the compensation parameter; the compensation parameter is matched with the compensation electric energy, and the compensation electric energy is used to suppress the harmonics of the load electric energy.

7. The method according to claim 6, characterized in that The determining of the compensation parameter based on the load electric energy comprises: transforming the load electric energy to determine the harmonic current component in the load electric energy; The compensation parameter is determined according to the harmonic current component and the initial power of the voltage source converter.

8. The method according to claim 7, characterized in that The step of transforming the load electric energy to determine the harmonic current component in the load electric energy includes: Performing a Park transformation on the load electric energy to determine a fundamental current component in the load electric energy; A harmonic current component within the load power is determined based on the load power and the fundamental current component.

9. The method according to claim 7, characterized in that: The determining of the compensation parameter according to the harmonic current component and the initial electric energy of the voltage source converter comprises: Determining a compensation parameter relationship of the voltage source converter based on the initial electric energy of the voltage source converter and the current relationship between the primary side, the secondary side and the tap of the rectifier transformer; Substituting the harmonic current component into the compensation parameter relationship of the voltage source converter, the compensation parameter is determined.

10. The method according to claim 6, characterized in that The step of controlling the voltage source converter to output compensation electric energy to the tap of the rectifier transformer according to the compensation parameter comprises: Performing coordinate transformation on the compensation parameter to determine the component parameter corresponding to the compensation parameter; generating a corresponding control signal according to the component parameters; The voltage source converter is controlled to output the compensation power to the tap of the rectifier transformer based on the corresponding control signal.

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