CN113411001A - Hydrogen production power supply system, hydrogen production device and hydrogen production method - Google Patents
Hydrogen production power supply system, hydrogen production device and hydrogen production method Download PDFInfo
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- CN113411001A CN113411001A CN202110759167.6A CN202110759167A CN113411001A CN 113411001 A CN113411001 A CN 113411001A CN 202110759167 A CN202110759167 A CN 202110759167A CN 113411001 A CN113411001 A CN 113411001A
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/145—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means
- H02M7/155—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only
- H02M7/1552—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a thyratron or thyristor type requiring extinguishing means using semiconductor devices only in a biphase or polyphase arrangement
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B1/00—Electrolytic production of inorganic compounds or non-metals
- C25B1/01—Products
- C25B1/02—Hydrogen or oxygen
- C25B1/04—Hydrogen or oxygen by electrolysis of water
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B15/00—Operating or servicing cells
- C25B15/02—Process control or regulation
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- C—CHEMISTRY; METALLURGY
- C25—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES; APPARATUS THEREFOR
- C25B—ELECTROLYTIC OR ELECTROPHORETIC PROCESSES FOR THE PRODUCTION OF COMPOUNDS OR NON-METALS; APPARATUS THEREFOR
- C25B9/00—Cells or assemblies of cells; Constructional parts of cells; Assemblies of constructional parts, e.g. electrode-diaphragm assemblies; Process-related cell features
- C25B9/60—Constructional parts of cells
- C25B9/65—Means for supplying current; Electrode connections; Electric inter-cell connections
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/36—Hydrogen production from non-carbon containing sources, e.g. by water electrolysis
Abstract
The application discloses a power supply system for hydrogen production, a hydrogen production device and a hydrogen production method, wherein the system comprises: a pulse width modulation rectifier and an ac/dc circuit; the input side of the pulse width modulation rectifier and the input side of the alternating current/direct current circuit are respectively used for connecting an alternating current power supply; the output side of the pulse width modulation rectifier and the output side of the alternating current/direct current circuit are used for being connected with the hydrogen production tank; and when the difference value between the output voltage of the pulse width modulation rectifier and the output voltage of the alternating current/direct current circuit is smaller than the preset voltage, controlling the output side of the pulse width modulation rectifier to be connected with the hydrogen production tank. By using the pulse width modulation rectifier, the hydrogen production system does not need to be provided with an additional reactive power compensation device, and the cost of hydrogen production is reduced. In order to avoid that the impact current in the hydrogen production circuit is too large to influence devices in the pulse width modulation rectifier, the alternating current/direct current circuit is used for charging the hydrogen production tank, so that the output voltage of the alternating current/direct current circuit, namely the voltage of the hydrogen production tank, is gradually increased.
Description
Technical Field
The application relates to the field of power supplies, in particular to a hydrogen production power supply system, a hydrogen production device and a hydrogen production method.
Background
In recent years, with the increasing problems of global environmental pollution, energy crisis, global warming and the like, the hydrogen production technology is more and more widely applied. Conventional hydrogen production processes typically require the use of direct current, and therefore hydrogen production power supplies typically need to include an ac/dc converter circuit, which is required to rectify ac power to dc power.
Currently, hydrogen production power supplies are typically implemented using thyristor-phase controlled rectifiers. The output direct current voltage of the thyristor phase-controlled rectifier can be adjusted by controlling the conduction angle of the thyristor, so that the input alternating current is rectified into direct current with controllable voltage.
However, in the prior art, the thyristor phase-controlled rectifier scheme generates a large amount of reactive power when performing rectification, and because the harmonic current content of the thyristor phase-controlled rectifier is large when performing rectification. In the use process of the thyristor phase-controlled rectifier, the thyristor phase-controlled rectifier cannot compensate the reactive power and eliminate harmonic waves, so that an additional reactive power compensation and harmonic elimination device needs to be arranged, and the cost of a hydrogen production power supply is high.
Disclosure of Invention
In order to solve the technical problems, the application provides a power supply system for hydrogen production, a hydrogen production device and a hydrogen production method, which can perform rectification through a Pulse Width Modulation (PWM) rectifier without an additional reactive power compensation device, thereby reducing the cost of hydrogen production.
In order to achieve the above purpose, the technical solutions provided in the embodiments of the present application are as follows:
the embodiment of the application provides a power supply system for hydrogen production, which comprises: a pulse width modulation rectifier and an ac/dc circuit;
the input side of the pulse width modulation rectifier and the input side of the alternating current/direct current circuit are respectively used for connecting an alternating current power supply; the output side of the pulse width modulation rectifier and the output side of the alternating current/direct current circuit are respectively used for connecting a hydrogen production tank;
the pulse width modulation rectifier is used for converting alternating current of the alternating current power supply into direct current;
the alternating current/direct current circuit is used for converting alternating current output by the alternating current power supply into direct current with gradually increased voltage and charging the hydrogen production tank; and when the difference value between the output voltage of the pulse width modulation rectifier and the output voltage of the alternating current/direct current circuit is smaller than a preset voltage, controlling the output side of the pulse width modulation rectifier to be connected with the hydrogen production tank.
In one possible implementation, the system further includes: a controller;
the controller is used for controlling the alternating current/direct current circuit to convert alternating current output by the alternating current power supply into direct current with gradually increased voltage and charge the hydrogen production tank, and when the difference value between the output voltage of the pulse width modulation rectifier and the output voltage of the alternating current/direct current circuit is smaller than a preset voltage, the output side of the pulse width modulation rectifier is controlled to be connected with the hydrogen production tank.
In one possible implementation, the controller is specifically configured to: and when the difference value between the output voltage of the pulse width modulation rectifier and the output voltage of the alternating current/direct current circuit is smaller than a preset voltage, controlling the alternating current/direct current circuit to stop working, and controlling the output side of the pulse width modulation rectifier to be connected with the hydrogen production tank.
In one possible implementation, the controller is specifically configured to: and when the difference value between the output voltage of the pulse width modulation rectifier and the output voltage of the alternating current/direct current circuit is smaller than a preset voltage, controlling the alternating current/direct current circuit to normally work, and controlling the output side of the pulse width modulation rectifier to be connected with the hydrogen production tank.
In one possible implementation, the system further includes: a series switch;
the first end of the series switch is connected with the output end of the pulse width modulation rectifier, and the second end of the series switch is connected with the output end of the alternating current/direct current circuit;
the controller is specifically configured to close the series switch when a difference between the output voltage of the pulse width modulation rectifier and the output voltage of the ac/dc circuit is smaller than a preset voltage, and the output side of the pulse width modulation rectifier is connected to the hydrogen production tank through the series switch.
In one possible implementation, the system further includes: an AC/AC circuit;
the input side of the alternating current/alternating current circuit is used for connecting the alternating current power supply; the output side of the alternating current/alternating current circuit is connected with the input side of the alternating current/direct current circuit;
the controller is specifically configured to control the ac/ac circuit to adjust an ac voltage of the ac power supply, and to control an output voltage of the ac/ac circuit to gradually increase.
In one possible implementation, the system further includes: a DC/DC circuit;
the input side of the direct current/direct current circuit is connected with the output side of the alternating current/direct current circuit; the output side of the direct current/direct current circuit is used for connecting the hydrogen production tank;
the controller is specifically configured to control the dc/dc circuit to adjust the output voltage of the ac/dc circuit, and control the output voltage of the dc/dc circuit to gradually increase.
In one possible implementation, the ac/dc circuit includes: a rectification circuit and a direct current voltage reduction circuit;
the input side of the rectifying circuit is used for being connected with the alternating current power supply, the output side of the rectifying circuit is connected with the input side of the direct current voltage reduction circuit, and the output side of the direct current voltage reduction circuit is used for being connected with the hydrogen production tank.
In one possible implementation, the ac/dc circuit includes: a thyristor phase controlled rectifier.
In one possible implementation, the pwm rectifier operates in a pwm rectification mode;
or the like, or, alternatively,
the PWM rectifier operates in an uncontrollable rectification mode.
In a possible implementation manner, when the pwm rectifier operates in the pwm rectification mode, the pwm rectifier is any one of the following:
a single phase pulse width modulation rectifier, a two phase pulse width modulation rectifier, a three phase pulse width modulation rectifier, and a four phase pulse width modulation rectifier.
In a possible implementation manner, when the pwm rectifier operates in the pwm rectification mode, the pwm rectifier is any one of the following:
a two-level pulse width modulation rectifier, a three-level pulse width modulation rectifier, a four-level pulse width modulation rectifier, and a five-level pulse width modulation rectifier.
The embodiment of the application also provides a device for producing hydrogen, which comprises: a pulse width modulation rectifier, an alternating current/direct current circuit and a hydrogen production tank;
the input side of the pulse width modulation rectifier and the input side of the alternating current/direct current circuit are respectively used for connecting an alternating current power supply; the output side of the pulse width modulation rectifier and the output side of the alternating current/direct current circuit are respectively connected with a hydrogen production tank;
the pulse width modulation rectifier is used for converting alternating current of the alternating current power supply into direct current;
the alternating current/direct current circuit is used for converting alternating current output by the alternating current power supply into direct current with gradually increased voltage and charging the hydrogen production tank; and when the difference value between the output voltage of the pulse width modulation rectifier and the output voltage of the alternating current/direct current circuit is smaller than a preset voltage, controlling the output side of the pulse width modulation rectifier to be connected with the hydrogen production tank.
In one possible implementation, the apparatus further includes: a controller;
the controller is used for controlling the alternating current/direct current circuit to convert alternating current output by the alternating current power supply into direct current with gradually increased voltage and charge the hydrogen production tank, and when the difference value between the output voltage of the pulse width modulation rectifier and the output voltage of the alternating current/direct current circuit is smaller than a preset voltage, the output side of the pulse width modulation rectifier is controlled to be connected with the hydrogen production tank.
In one possible implementation manner, the method further includes: a series switch;
the first end of the series switch is connected with the output end of the pulse width modulation rectifier, and the second end of the series switch is connected with the output end of the alternating current/direct current circuit;
the controller is specifically configured to close the series switch when a difference between the output voltage of the pulse width modulation rectifier and the output voltage of the ac/dc circuit is smaller than a preset voltage, to control the ac/dc circuit to stop working, and the output side of the pulse width modulation rectifier is connected to the hydrogen production tank through the series switch.
The embodiment of the application also provides a method for producing hydrogen, which is applied to a power supply system for producing hydrogen, and the power supply system for producing hydrogen comprises: a pulse width modulation rectifier and an ac/dc circuit; the input side of the pulse width modulation rectifier and the input side of the alternating current/direct current circuit are respectively used for connecting an alternating current power supply; the output side of the pulse width modulation rectifier and the output side of the alternating current/direct current circuit are respectively used for connecting a hydrogen production tank; the pulse width modulation rectifier is used for converting alternating current of the alternating current power supply into direct current; the alternating current/direct current circuit is used for converting alternating current output by the alternating current power supply into direct current with gradually increased voltage and charging the hydrogen production tank; when the difference value between the output voltage of the pulse width modulation rectifier and the output voltage of the alternating current/direct current circuit is smaller than a preset voltage, controlling the output side of the pulse width modulation rectifier to be connected with the hydrogen production tank, wherein the method comprises the following steps:
starting the PWM rectifier and the AC/DC converter;
controlling the alternating current/direct current circuit to convert alternating current output by the alternating current power supply into direct current with gradually increased voltage and charge the hydrogen production tank;
when the difference value between the output voltage of the pulse width modulation rectifier and the output voltage of the alternating current/direct current circuit is smaller than a preset voltage, controlling the output side of the pulse width modulation rectifier to be connected with the hydrogen production tank;
and the pulse width modulation rectifier dynamically adjusts the output voltage according to the hydrogen production quantity requirement of the hydrogen production tank.
In one possible implementation, the hydrogen production power supply system further includes: a series switch; the first end of the series switch is connected with the output end of the pulse width modulation rectifier, and the second end of the series switch is connected with the output end of the alternating current/direct current circuit;
when the difference value between the output voltage of the pulse width modulation rectifier and the output voltage of the alternating current/direct current circuit is smaller than a preset voltage, controlling the output side of the pulse width modulation rectifier to be connected with the hydrogen production tank, and the method comprises the following steps:
and when the difference value between the output voltage of the pulse width modulation rectifier and the output voltage of the alternating current/direct current circuit is smaller than a preset voltage, the series switch is closed, and the output side of the pulse width modulation rectifier is connected with the hydrogen production tank through the series switch.
In one possible implementation, the starting the pwm rectifier and the ac/dc converter includes:
and starting the pulse width modulation rectifier, and starting the alternating current/direct current converter after the pulse width modulation rectifier has output voltage.
In a possible implementation manner, when a difference between the output voltage of the pwm rectifier and the output voltage of the ac/dc circuit is smaller than a preset voltage, the method specifically includes:
the output voltage of the pulse width modulation rectifier is larger than the threshold voltage, and when the difference value between the output voltage of the pulse width modulation rectifier and the output voltage of the alternating current/direct current circuit is smaller than the preset voltage.
In a possible implementation manner, the threshold voltage is the lowest voltage which can be output after the pulse width modulation rectifier operates stably.
According to the technical scheme, the method has the following beneficial effects:
the embodiment of the application provides a power supply system for hydrogen production, a hydrogen production device and a hydrogen production method, wherein the system comprises: a pulse width modulation rectifier and an ac/dc circuit; the input side of the pulse width modulation rectifier and the input side of the alternating current/direct current circuit are respectively used for connecting an alternating current power supply; the output side of the pulse width modulation rectifier and the output side of the alternating current/direct current circuit are respectively used for connecting a hydrogen production tank; the pulse width modulation rectifier is used for converting alternating current of the alternating current power supply into direct current; the alternating current/direct current circuit is used for converting alternating current output by the alternating current power supply into direct current with gradually increased voltage and charging the hydrogen production tank; and when the difference value between the output voltage of the pulse width modulation rectifier and the output voltage of the alternating current/direct current circuit is smaller than a preset voltage, controlling the output side of the pulse width modulation rectifier to be connected with the hydrogen production tank.
Therefore, the hydrogen production power supply system, the hydrogen production device and the hydrogen production method provided by the embodiment of the application can reduce harmonic current by using the pulse width modulation rectifier, can directly compensate reactive power in the pulse width modulation rectifier, do not need to be provided with an additional reactive power compensation device in the hydrogen production system, and reduce the cost of hydrogen production. And this application discovers that pulse width modulation rectifier can produce very big impulse current when being connected with hydrogen manufacturing groove, in order to avoid the too big device in pulse width modulation rectifier of influence of the electric current in the hydrogen manufacturing circuit, still uses AC/DC circuit to the charging for hydrogen manufacturing groove, makes the output voltage of AC/DC circuit promptly the voltage at hydrogen manufacturing groove both ends rise gradually.
Drawings
In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings needed to be used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.
FIG. 1a is a schematic diagram of a power supply system for producing hydrogen according to an embodiment of the present disclosure;
FIG. 1b is a schematic diagram of another hydrogen production power supply system according to an embodiment of the present disclosure;
FIG. 2 is a schematic diagram of the voltage/current V/I characteristics of a hydrogen production cell provided in an embodiment of the present application;
FIG. 3 is an equivalent schematic diagram of the electrical characteristics of a hydrogen production cell provided by the embodiments of the present application;
FIG. 4 is a schematic diagram of another hydrogen production power supply system provided in the embodiments of the present application;
FIG. 5 is a schematic diagram of another hydrogen production power supply system according to an embodiment of the present disclosure;
FIG. 6a is a schematic structural diagram of a power supply system for producing hydrogen with an AC power supply according to an embodiment of the present disclosure;
FIG. 6b is a schematic structural diagram of a power system for producing hydrogen from different AC power sources according to an embodiment of the present disclosure;
FIG. 7 is a schematic diagram of a hydrogen production apparatus according to an embodiment of the present disclosure;
FIG. 8 is a flow chart of a method for producing hydrogen according to an embodiment of the present disclosure.
Detailed Description
In order to help better understand the scheme provided by the embodiment of the present application, before describing the method provided by the embodiment of the present application, a scenario of an application of the scheme of the embodiment of the present application is described.
In recent years, with the increasing problems of global environmental pollution, energy crisis, global warming and the like, the hydrogen production technology is more and more widely applied. Conventional hydrogen production processes typically require the use of direct current, and therefore hydrogen production power supplies typically need to include an ac/dc converter circuit, which is required to rectify ac power to dc power.
Currently, hydrogen production power supplies are typically implemented using thyristor-phase controlled rectifiers. The output direct current voltage of the thyristor phase-controlled rectifier can be adjusted by controlling the conduction angle of the thyristor, so that the input alternating current is rectified into direct current with controllable voltage.
However, in the prior art, the thyristor phase-controlled rectifier scheme generates a large amount of reactive power when performing rectification, and because the harmonic current content of the thyristor phase-controlled rectifier is large when performing rectification. In the use process of the thyristor phase-controlled rectifier, the thyristor phase-controlled rectifier cannot compensate the reactive power and eliminate harmonic waves, so that an additional reactive power compensation and harmonic elimination device needs to be arranged, and the cost of a hydrogen production power supply is high.
In order to solve the technical problem, the power supply system and the device for hydrogen production provided by the embodiment of the application can reduce harmonic current by using the pulse width modulation rectifier, can directly compensate reactive power in the pulse width modulation rectifier, do not need to be provided with an additional reactive power compensation device, and reduce the cost of hydrogen production. And the application finds that the pulse width modulation rectifier can generate large impact current when being connected with the hydrogen production tank, so that in order to avoid the influence of overlarge current in the hydrogen production circuit on devices in the pulse width modulation rectifier, the alternating current/direct current circuit is used for charging the hydrogen production tank, and the output voltage of the alternating current/direct current circuit, namely the voltage at two ends of the hydrogen production tank, is gradually increased.
In order to make the aforementioned objects, features and advantages of the present application more comprehensible, embodiments accompanying the drawings are described in detail below.
Referring to fig. 1a, the figure is a schematic diagram of a power supply system for producing hydrogen according to an embodiment of the present application.
As shown in fig. 1a, a power supply system for producing hydrogen provided by the embodiment of the present application includes: a pulse width modulation rectifier 200 and an ac/dc circuit 300;
the input side of the pulse width modulation rectifier 200 and the input side of the alternating current/direct current circuit 300 are respectively used for connecting an alternating current power supply; the output side of the pulse width modulation rectifier 200 and the output side of the alternating current/direct current circuit 300 are respectively used for connecting the hydrogen production tank;
a pulse width modulation rectifier 200 for converting an alternating current of an alternating current power supply into a direct current;
an ac/dc circuit 300 for converting ac power outputted from the ac power supply into dc power having a gradually increased voltage and charging the hydrogen production tank; and when the difference value between the output voltage of the pulse width modulation rectifier 200 and the output voltage of the alternating current/direct current circuit 300 is smaller than the preset voltage, controlling the output side of the pulse width modulation rectifier 200 to be connected with the hydrogen production tank.
It can be understood that, in the technical scheme in the embodiment of the application, the pulse width modulation rectifier is adopted to convert the alternating current into the direct current, so that the reactive power consumed by a hydrogen production power supply system can be reduced, and the power grid is more friendly.
It should be understood that the ac/dc circuit in the embodiment of the present application converts the ac power output from the ac power source into the dc power with gradually increased voltage and charges the hydrogen production tank, and the ac/dc circuit may convert the ac power output from the ac power source into the dc power with gradually increased voltage from 0 and charges the hydrogen production tank. As an example, the output voltage of the pulse width modulation rectifier 200 in the embodiment of the present application may be 100V, the preset voltage is 3V, and the output voltage of the ac/dc circuit 300 gradually increases from 0 until the difference between the output voltage of the pulse width modulation rectifier 200 and the output voltage of the ac/dc circuit 300 is smaller than the preset voltage, that is, the output voltage of the ac/dc circuit 300 is 97V, and the output side of the pulse width modulation rectifier 200 is controlled to be connected to the hydrogen production tank.
It should be noted that in practical applications, a negative value may occur in the difference between the output voltage of the pwm rectifier 200 and the output voltage of the ac/dc circuit 300. It should be understood that the difference between the output voltage of the pwm rectifier 200 and the output voltage of the ac/dc circuit 300 in the embodiment of the present application is smaller than the preset voltage, and includes: until the absolute value of the difference between the output voltage of the pwm rectifier 200 and the output voltage of the ac/dc circuit 300 is less than the preset voltage.
Referring to fig. 1b, it is a schematic diagram of another power system for producing hydrogen according to the embodiment of the present application.
As shown in fig. 1b, as a possible embodiment, the power supply system for hydrogen production further comprises: a controller 100; and the controller 100 is used for controlling the alternating current/direct current circuit 300 to convert alternating current output by the alternating current power supply into direct current with gradually increased voltage and charge the hydrogen production tank, and when the difference value between the output voltage of the pulse width modulation rectifier 200 and the output voltage of the alternating current/direct current circuit 300 is smaller than a preset voltage, controlling the output side of the pulse width modulation rectifier 200 to be connected with the hydrogen production tank.
It should be noted that the PWM rectifier in the embodiment of the present application may be a two-phase PWM rectifier, a three-phase PWM rectifier, or a PWM rectifier with other phases. The embodiment of the application does not limit the number of phases of the PWM rectifier, and certainly, does not limit the number of levels of the PWM rectifier.
Referring to fig. 2, the figure is a schematic diagram of the voltage/current V/I characteristic of a hydrogen production cell provided in the embodiment of the present application.
The abscissa of the graph is the current I of the hydrogen production cell, and the ordinate is the voltage V of the hydrogen production cell. The graph shows the current-voltage characteristics of the hydrogen production cell. As shown in fig. 2, the present application has found that the current-voltage characteristics of the hydrogen cell are approximately linear when the voltage of the hydrogen cell is less than the breakover voltage Vt. Therefore, the technical scheme of the application enables the electrical characteristics of the hydrogen production tank to be equivalent to a variable capacitor connected in parallel with a variable resistor. As a possible implementation, the controller in the embodiment of the present application is further configured to control the output voltage of the pwm rectifier. It should be understood that when the pwm rectifier is not connected to the hydrogen tank, the controller in the embodiment of the present application controls the output voltage of the pwm rectifier to be less than the breakover voltage Vt; when the pulse width modulation rectifier is connected with the hydrogen production tank, in order to improve the hydrogen production efficiency of the hydrogen production tank, the controller in the embodiment of the application can control the output voltage of the pulse width modulation rectifier to be larger than the breakover voltage Vt.
In the embodiment of the present application, as a possible implementation manner, the controller is specifically configured to: when the difference value between the output voltage of the pulse width modulation rectifier and the output voltage of the alternating current/direct current circuit is smaller than the preset voltage, the alternating current/direct current circuit is controlled to stop working, and the output side of the pulse width modulation rectifier is controlled to be connected with the hydrogen production tank.
In the embodiment of the present application, as another possible implementation manner, the controller is specifically configured to: and when the difference value between the output voltage of the pulse width modulation rectifier and the output voltage of the alternating current/direct current circuit is smaller than the preset voltage, controlling the alternating current/direct current circuit to normally work, and controlling the output side of the pulse width modulation rectifier to be connected with the hydrogen production tank.
Referring to fig. 3, the figure is an equivalent schematic diagram of the electrical characteristics of a hydrogen production cell provided in the embodiments of the present application.
As shown in fig. 3, the hydrogen production cell in the embodiment of the present application is equivalent to a capacitor C connected in parallel with a resistor R, where the capacitor C may be a capacitor with a variable capacitance value, and the resistor R may be a resistor with a variable resistance value. It can be understood that when the output side of the pulse width modulation rectifier is connected with the two input ends of the hydrogen production tank, the capacity of the capacitor C is 0 at this time. Therefore, at the moment when the output side of the pwm rectifier is connected to the hydrogen production tank, the output side of the pwm rectifier will be short-circuited by the capacitor C, and a large inrush current will be generated in the loop of the output side of the pwm rectifier, and the inrush current will damage devices in the pwm rectifier, such as the power switching device or the switching device.
Therefore, in order to avoid the current in the hydrogen production circuit from being too large to affect the devices in the pwm rectifier, the embodiments of the present application also use an ac/dc circuit to convert the input ac power to a dc power with gradually increasing voltage and charge the hydrogen production cell. It should be understood that, because the magnitude of the voltage output by the ac/dc circuit can be controlled, the ac/dc circuit in this embodiment of the present application may charge the equivalent capacitor C of the hydrogen production tank on the premise of not generating a large current by using the output voltage of the ac/dc circuit before the output terminal of the pulse width modulation rectifier in this embodiment of the present application is connected to the hydrogen production tank, and the voltage of the equivalent capacitor C in the hydrogen production tank gradually increases until the difference between the output voltage of the ac/dc circuit and the output voltage of the pulse width modulation rectifier is smaller than a preset voltage, which indicates that the charging of the capacitor C at this time is substantially completed, that is, the voltage of the capacitor C is already close to the output voltage of the pulse width modulation rectifier, and then the output side of the pulse width modulation rectifier is controlled to be connected to the hydrogen production tank.
It can be understood that, since the voltage across the capacitor C at this time is close to the output voltage of the pwm rectifier, when the hydrogen tank is connected to the output side of the pwm rectifier, a large inrush current will not be generated. In this way, the scheme provided by the application can protect the devices in the system from being damaged by the impact current.
Referring to fig. 4, a schematic diagram of a power supply system for producing hydrogen according to an embodiment of the present disclosure is shown.
Considering that the technical solution of the embodiment of the present application needs to control the output side of the pwm rectifier to be connected to the hydrogen production tank, as a possible implementation manner, the power supply system for producing hydrogen in the embodiment of the present application further includes: and a switch K is connected in series.
The first end of the series switch is connected with the output end of the pulse width modulation rectifier, and the second end of the series switch is connected with the output end of the alternating current/direct current circuit;
the controller 100 is specifically configured to close the series switch K when a difference between the output voltage of the pwm rectifier 200 and the output voltage of the ac/dc circuit 300 is smaller than a preset voltage, control the ac/dc circuit 300 to stop working, and connect the output side of the pwm rectifier 200 to the hydrogen production tank through the series switch K. It should be noted that the controller is omitted and not shown in fig. 4, but the closing or opening of the series switch K in the embodiment of the present application is controlled by the controller.
As a possible implementation manner, the power supply system for producing hydrogen in the example of the present application may further include: an AC/AC circuit. The input side of the alternating current/alternating current circuit is used for connecting an alternating current power supply; the output side of the alternating current/alternating current circuit is connected with the input side of the alternating current/direct current circuit; and the controller is specifically used for controlling the alternating current/alternating current circuit to regulate the alternating current voltage of the alternating current power supply and controlling the output voltage of the alternating current/alternating current circuit to gradually rise.
As another possible implementation manner, the power supply system for producing hydrogen in the example of the present application may further include: a dc/dc circuit. The input side of the direct current/direct current circuit is connected with the output side of the alternating current/direct current circuit; the output side of the direct current/direct current circuit is used for connecting the hydrogen production tank; and the controller is specifically used for controlling the direct current/direct current circuit to regulate the output voltage of the direct current/direct current circuit and controlling the output voltage of the direct current/direct current circuit to gradually rise.
In embodiments of the present application, the controller may be specifically configured to control the output current of the ac/dc circuit to be less than a threshold current; the threshold current is the maximum current allowed by the ac/dc circuit. It will be appreciated that in order that the current at the output of the ac/dc circuit does not damage the devices in the circuit, the controller may control the output current of the ac/dc circuit to be less than a threshold current, which is the maximum current allowed by the ac/dc circuit. Further, in order to facilitate control of the output current of the ac/dc circuit, the controller may be specifically configured to control the output current of the ac/dc circuit to be a constant value.
In the embodiment of the application, the working voltage corresponding to the output voltage of the pulse width modulation rectifier is the voltage when the hydrogen production tank normally works. It should be understood that when the difference between the output voltage of the pwm rectifier and the output voltage of the ac/dc circuit in the embodiment of the present application is smaller than the preset voltage, it indicates that the capacitor C is substantially charged, i.e. the voltage of the capacitor C is close to the output voltage of the pwm rectifier.
In the embodiment of the application, in order to enable the output current of the pulse width modulation rectifier when the output side of the pulse width modulation rectifier is connected with the hydrogen production tank to be small when the alternating current/direct current circuit stops working, the preset voltage should be small. It should be understood that the output current of the pwm rectifier is equal to the sum of the charging current of the capacitor C and the current of the resistor R, and when the preset voltage is small, the current of the capacitor C is small when the output side of the pwm rectifier is connected to the hydrogen production tank, and the output current of the pwm rectifier is also small.
It should be noted that in practical applications, the difference between the output voltage of the ac/dc circuit 300 and the output voltage of the pwm rectifier 200 may have a negative value. As a possible implementation manner, the difference between the output voltage of the ac/dc circuit 300 and the output voltage of the pwm rectifier 200 in the embodiment of the present application is smaller than the preset voltage, which may also include: the absolute value of the difference between the output voltage of the ac/dc circuit 300 and the output voltage of the pwm rectifier 200 is smaller than the predetermined voltage.
As an example, the ac/dc circuit in the embodiment of the present application may include: a rectifying circuit and a DC voltage-reducing circuit. The input side of the rectifying circuit is used for connecting an alternating current power supply, the output side of the rectifying circuit is connected with the input side of the direct current voltage reduction circuit, and the output side of the direct current voltage reduction circuit is used for connecting the hydrogen production tank.
As another example, in particular, an ac/dc circuit, includes: a thyristor phase controlled rectifier.
Referring to fig. 5, a schematic diagram of a power supply system for producing hydrogen according to an embodiment of the present disclosure is shown.
As shown in fig. 5, the power supply system for producing hydrogen provided by the embodiment of the present application includes a pulse width modulation rectifier 200, an ac/dc circuit 300, and a series switch K.
The input side of the pwm rectifier 200 and the input side of the ac/dc circuit 300 are used for connecting ac power sources, respectively, and only three-phase ac power sources are taken as an example in the figure, and the number of phases of the ac power sources is not limited in the embodiments of the present application. The pwm rectifier is also only a three-level pwm rectifier, and the number of levels of the pwm rectifier is not limited in the embodiments of the present application. The output side of the pulse width modulation rectifier 200 is connected to the hydrogen production tank through a series switch K, and the output side of the ac/dc circuit 300 is connected to the hydrogen production tank.
In the embodiment of the application, the pulse width modulation rectifier works in a pulse width modulation rectification mode; or, the pulse width modulation rectifier works in an uncontrollable rectification mode. When the pulse width modulation rectifier works in the pulse width modulation rectification mode, the pulse width modulation rectifier is any one of the following types: a single phase pulse width modulation rectifier, a two phase pulse width modulation rectifier, a three phase pulse width modulation rectifier, and a four phase pulse width modulation rectifier. Correspondingly, when the pwm rectifier operates in the pwm rectification mode, the pwm rectifier is any one of the following: a two-level pulse width modulation rectifier, a three-level pulse width modulation rectifier, a four-level pulse width modulation rectifier, and a five-level pulse width modulation rectifier.
Referring to fig. 6a, the drawing is a schematic structural diagram of a power supply system for producing hydrogen with an ac power supply according to an embodiment of the present application. Referring to fig. 6b, the figure is a schematic diagram of a power supply system for producing hydrogen from different ac power sources according to an embodiment of the present application.
As shown in fig. 6a, the input side of the pwm rectifier 200 and the input side of the ac/dc circuit 300 are connected to the same input terminal a, through which the ac power source will then be connected. As shown in fig. 6B, the input side of the ac/dc circuit 300 is connected to input a, the input side of the pwm rectifier 200 is connected to input B, and the input a and input B may be connected to different ac power sources.
It should be understood that, in the embodiment of the present application, the input side of the pwm rectifier 200 and the input side of the ac/dc circuit 300 may be connected to the same ac power source, or may be connected to different ac power sources, and the embodiment of the present application is not limited herein.
It should be noted that, in this embodiment of the application, when the difference between the output voltage of the pwm rectifier and the output voltage of the ac/dc circuit is smaller than the preset voltage, and the ac/dc circuit 300 is controlled to exit from operation, the ac/dc circuit 300 may be disconnected from the ac power supply through an internal switch of the ac/dc circuit 300 (as shown in fig. 5), or an external switch may be provided between the ac/dc circuit 300 and the ac power supply, and the output side of the ac/dc circuit is disconnected from the ac power supply through the external switch, so that the ac/dc circuit 300 is controlled to exit from operation.
In summary, the system for producing hydrogen provided by the embodiment of the present application can reduce harmonic current by using the pwm rectifier, and can directly perform reactive power compensation in the pwm rectifier without providing an additional reactive power compensation device, thereby reducing the cost of producing hydrogen. In addition, the application finds that the pulse width modulation rectifier can generate large impact current at the moment of being connected with the hydrogen production tank, so that in order to avoid the influence of overlarge current in the hydrogen production circuit on devices in the pulse width modulation rectifier, the alternating current/direct current circuit is used for charging the hydrogen production tank, and the output voltage of the alternating current/direct current circuit, namely the voltage at two ends of the hydrogen production tank, is gradually increased.
According to the power supply system for producing hydrogen provided by the embodiment, the embodiment of the application also provides a device for producing hydrogen.
Referring to fig. 7, the figure is a schematic structural diagram of an apparatus for producing hydrogen according to an embodiment of the present application.
As shown in fig. 7, the apparatus for producing hydrogen in the present embodiment includes: a pulse width modulation rectifier 200, an ac/dc circuit 300, and a hydrogen production tank 400;
the input side of the pulse width modulation rectifier 200 and the input side of the alternating current/direct current circuit 300 are respectively used for connecting an alternating current power supply; the output side of the pulse width modulation rectifier 200 and the output side of the alternating current/direct current circuit 300 are respectively connected with the hydrogen production tank 400;
a pulse width modulation rectifier 200 for converting an alternating current of an alternating current power supply into a direct current;
an ac/dc circuit 300 for converting ac power outputted from the ac power supply into dc power having a gradually increased voltage and charging the hydrogen production tank; when the difference between the output voltage of the PWM rectifier 200 and the output voltage of the AC/DC circuit 300 is less than the preset voltage, the output side of the PWM rectifier 200 is controlled to be connected to the hydrogen production tank 400.
In an embodiment of the present application, the apparatus for producing hydrogen further comprises: a controller; and the controller is used for controlling the alternating current/direct current circuit to convert alternating current output by the alternating current power supply into direct current with gradually increased voltage and charge the hydrogen production tank, and when the difference value between the output voltage of the pulse width modulation rectifier and the output voltage of the alternating current/direct current circuit is smaller than a preset voltage, the output side of the pulse width modulation rectifier is controlled to be connected with the hydrogen production tank.
As a possible implementation manner, the hydrogen production apparatus in the example of the present application further includes: a series switch; the first end of the series switch is connected with the output end of the pulse width modulation rectifier, and the second end of the series switch is connected with the output end of the alternating current/direct current circuit; and the controller is specifically used for closing the series switch when the difference value between the output voltage of the pulse width modulation rectifier and the output voltage of the alternating current/direct current circuit is smaller than a preset voltage, controlling the alternating current/direct current circuit to stop working, and connecting the output side of the pulse width modulation rectifier to the hydrogen production tank through the series switch.
As a possible implementation manner, the ac/dc circuit in the embodiment of the present application includes: a rectification circuit and a direct current voltage reduction circuit; the input side of the rectifying circuit is used for connecting an alternating current power supply, the output side of the rectifying circuit is connected with the input side of the direct current voltage reduction circuit, and the output side of the direct current voltage reduction circuit is used for connecting the hydrogen production tank.
As a possible implementation manner, the ac/dc circuit in the embodiment of the present application includes: a thyristor phase controlled rectifier.
As a possible implementation manner, the hydrogen production apparatus in the example of the present application further includes: an AC/AC circuit; the input side of the alternating current/alternating current circuit is used for connecting an alternating current power supply; the output side of the alternating current/alternating current circuit is connected with the input side of the alternating current/direct current circuit; and the controller is specifically used for controlling the alternating current/alternating current circuit to regulate the alternating current voltage of the alternating current power supply and controlling the output voltage of the alternating current/alternating current circuit to gradually rise.
As a possible implementation manner, the hydrogen production apparatus in the example of the present application further includes: a DC/DC circuit; the input side of the direct current/direct current circuit is connected with the output side of the alternating current/direct current circuit; the output side of the direct current/direct current circuit is used for connecting the hydrogen production tank; and the controller is specifically used for controlling the direct current/direct current circuit to regulate the output voltage of the alternating current/direct current circuit and controlling the output voltage of the direct current/direct current circuit to gradually rise.
As a possible implementation manner, the controller of the hydrogen production apparatus in the embodiment of the present application is specifically used for controlling the output current of the ac/dc circuit to be a constant value.
In summary, the hydrogen production apparatus provided by the embodiment of the present application can reduce harmonic current by using the pwm rectifier, and can directly perform reactive power compensation in the pwm rectifier without providing an additional reactive power compensation apparatus, thereby reducing the cost of hydrogen production. In addition, the application finds that the pulse width modulation rectifier can generate large impact current at the moment of being connected with the hydrogen production tank, so that in order to avoid the influence of overlarge current in the hydrogen production circuit on devices in the pulse width modulation rectifier, the alternating current/direct current circuit is used for charging the hydrogen production tank, and the output voltage of the alternating current/direct current circuit, namely the voltage at two ends of the hydrogen production tank, is gradually increased.
According to the power supply system for producing hydrogen and the device for producing hydrogen provided by the embodiment, the embodiment of the application also provides a method for producing hydrogen.
Referring to fig. 8, a flow diagram of a method for producing hydrogen according to an embodiment of the present application is shown.
As shown in fig. 8, the method for producing hydrogen provided by the embodiment of the present application is applied to a power supply system for producing hydrogen, and the power supply system for producing hydrogen includes: a pulse width modulation rectifier and an ac/dc circuit; the input side of the pulse width modulation rectifier and the input side of the alternating current/direct current circuit are respectively used for connecting an alternating current power supply; the output side of the pulse width modulation rectifier and the output side of the alternating current/direct current circuit are respectively used for connecting the hydrogen production tank; the pulse width modulation rectifier is used for converting alternating current of the alternating current power supply into direct current; the alternating current/direct current circuit is used for converting alternating current output by the alternating current power supply into direct current with gradually increased voltage and charging the hydrogen production tank; when the difference value between the output voltage of the pulse width modulation rectifier and the output voltage of the alternating current/direct current circuit is smaller than a preset voltage, controlling the output side of the pulse width modulation rectifier to be connected with a hydrogen production tank, wherein the method comprises the following steps:
s801: the pwm rectifier and ac/dc circuit are enabled.
S802: and controlling the alternating current/direct current circuit to convert alternating current output by the alternating current power supply into direct current with gradually increased voltage and charge the hydrogen production tank.
S803: and when the difference value between the output voltage of the pulse width modulation rectifier and the output voltage of the alternating current/direct current circuit is smaller than the preset voltage, controlling the output side of the pulse width modulation rectifier to be connected with the hydrogen production tank.
S804: the pulse width modulation rectifier dynamically adjusts the output voltage according to the hydrogen production quantity requirement of the hydrogen production tank.
In the embodiment of the present application, as a possible implementation manner, the power supply system for producing hydrogen further includes: a series switch; the first end of the series switch is connected with the output end of the pulse width modulation rectifier, and the second end of the series switch is connected with the output end of the alternating current/direct current circuit. When the difference value between the output voltage of the pulse width modulation rectifier and the output voltage of the alternating current/direct current circuit is smaller than the preset voltage, the output side of the pulse width modulation rectifier is controlled to be connected with the hydrogen production tank, and the hydrogen production tank comprises: and when the difference value between the output voltage of the pulse width modulation rectifier and the output voltage of the alternating current/direct current circuit is smaller than the preset voltage, the series switch is closed, and the output side of the pulse width modulation rectifier is connected with the hydrogen production tank through the series switch.
In the embodiment of the present application, as a possible implementation manner, the starting pulse width modulation rectifier and the ac/dc converter include: and starting the pulse width modulation rectifier, and starting the alternating current/direct current converter after the pulse width modulation rectifier has output voltage.
In this embodiment, as a possible implementation manner, when a difference between an output voltage of the pwm rectifier and an output voltage of the ac/dc circuit is smaller than a preset voltage, the method specifically includes: the output voltage of the PWM rectifier is greater than the threshold voltage, and when the difference between the output voltage of the PWM rectifier and the output voltage of the AC/DC circuit is less than the predetermined voltage.
In the embodiment of the present application, as a possible implementation manner, the threshold voltage is the lowest voltage that can be output after the pwm rectifier operates stably.
As can be seen from the above description of the embodiments, those skilled in the art can clearly understand that all or part of the steps in the above embodiment methods can be implemented by software plus a necessary general hardware platform. Based on such understanding, the technical solutions of the present application may be essentially implemented or portions thereof contributing to the prior art may be embodied in the form of a software product, which may be stored in a storage medium, such as a ROM/RAM, a magnetic disk, an optical disk, etc., and includes several instructions for causing a computer device (which may be a personal computer, a server, or a network communication device such as a media gateway, etc.) to execute the method of the embodiments or some portions thereof.
It should be noted that, in the present specification, the embodiments are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments may be referred to each other. The method disclosed by the embodiment corresponds to the system disclosed by the embodiment, so that the description is simple, and the relevant points can be referred to the system part for description.
It should also be noted that, in this document, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The foregoing description of the disclosed embodiments will enable those skilled in the art to make or use the invention in various modifications to these embodiments, which will be apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the application. Thus, the present application is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (20)
1. A power supply system for producing hydrogen, comprising: a pulse width modulation rectifier and an ac/dc circuit;
the input side of the pulse width modulation rectifier and the input side of the alternating current/direct current circuit are respectively used for connecting an alternating current power supply; the output side of the pulse width modulation rectifier and the output side of the alternating current/direct current circuit are respectively used for connecting a hydrogen production tank;
the pulse width modulation rectifier is used for converting alternating current of the alternating current power supply into direct current;
the alternating current/direct current circuit is used for converting alternating current output by the alternating current power supply into direct current with gradually increased voltage and charging the hydrogen production tank; and when the difference value between the output voltage of the pulse width modulation rectifier and the output voltage of the alternating current/direct current circuit is smaller than a preset voltage, controlling the output side of the pulse width modulation rectifier to be connected with the hydrogen production tank.
2. The system of claim 1, further comprising: a controller;
the controller is used for controlling the alternating current/direct current circuit to convert alternating current output by the alternating current power supply into direct current with gradually increased voltage and charge the hydrogen production tank, and when the difference value between the output voltage of the pulse width modulation rectifier and the output voltage of the alternating current/direct current circuit is smaller than a preset voltage, the output side of the pulse width modulation rectifier is controlled to be connected with the hydrogen production tank.
3. The system of claim 2, wherein the controller is specifically configured to: and when the difference value between the output voltage of the pulse width modulation rectifier and the output voltage of the alternating current/direct current circuit is smaller than a preset voltage, controlling the alternating current/direct current circuit to stop working, and controlling the output side of the pulse width modulation rectifier to be connected with the hydrogen production tank.
4. The system of claim 2, wherein the controller is specifically configured to: and when the difference value between the output voltage of the pulse width modulation rectifier and the output voltage of the alternating current/direct current circuit is smaller than a preset voltage, controlling the alternating current/direct current circuit to normally work, and controlling the output side of the pulse width modulation rectifier to be connected with the hydrogen production tank.
5. The system of any of claims 2-4, further comprising: a series switch;
the first end of the series switch is connected with the output end of the pulse width modulation rectifier, and the second end of the series switch is connected with the output end of the alternating current/direct current circuit;
the controller is specifically configured to close the series switch when a difference between the output voltage of the pulse width modulation rectifier and the output voltage of the ac/dc circuit is smaller than a preset voltage, and the output side of the pulse width modulation rectifier is connected to the hydrogen production tank through the series switch.
6. The system of claim 2, further comprising: an AC/AC circuit;
the input side of the alternating current/alternating current circuit is used for connecting the alternating current power supply; the output side of the alternating current/alternating current circuit is connected with the input side of the alternating current/direct current circuit;
the controller is specifically configured to control the ac/ac circuit to adjust an ac voltage of the ac power supply, and to control an output voltage of the ac/ac circuit to gradually increase.
7. The system of claim 2, further comprising: a DC/DC circuit;
the input side of the direct current/direct current circuit is connected with the output side of the alternating current/direct current circuit; the output side of the direct current/direct current circuit is used for connecting the hydrogen production tank;
the controller is specifically configured to control the dc/dc circuit to adjust the output voltage of the ac/dc circuit, and control the output voltage of the dc/dc circuit to gradually increase.
8. The system of claim 1, wherein the ac/dc circuit comprises: a rectification circuit and a direct current voltage reduction circuit;
the input side of the rectifying circuit is used for being connected with the alternating current power supply, the output side of the rectifying circuit is connected with the input side of the direct current voltage reduction circuit, and the output side of the direct current voltage reduction circuit is used for being connected with the hydrogen production tank.
9. The system of claim 1, wherein the ac/dc circuit comprises: a thyristor phase controlled rectifier.
10. The system of claim 1, wherein the pulse width modulated rectifier operates in a pulse width modulated rectifier mode;
or the like, or, alternatively,
the PWM rectifier operates in an uncontrollable rectification mode.
11. The system of claim 2, wherein when the pwm rectifier operates in the pwm rectification mode, the pwm rectifier is any one of:
a single phase pulse width modulation rectifier, a two phase pulse width modulation rectifier, a three phase pulse width modulation rectifier, and a four phase pulse width modulation rectifier.
12. The system of claim 2, wherein when the pwm rectifier operates in the pwm rectification mode, the pwm rectifier is any one of:
a two-level pulse width modulation rectifier, a three-level pulse width modulation rectifier, a four-level pulse width modulation rectifier, and a five-level pulse width modulation rectifier.
13. An apparatus for producing hydrogen, comprising: a pulse width modulation rectifier, an alternating current/direct current circuit and a hydrogen production tank;
the input side of the pulse width modulation rectifier and the input side of the alternating current/direct current circuit are respectively used for connecting an alternating current power supply; the output side of the pulse width modulation rectifier and the output side of the alternating current/direct current circuit are respectively connected with a hydrogen production tank;
the pulse width modulation rectifier is used for converting alternating current of the alternating current power supply into direct current;
the alternating current/direct current circuit is used for converting alternating current output by the alternating current power supply into direct current with gradually increased voltage and charging the hydrogen production tank; and when the difference value between the output voltage of the pulse width modulation rectifier and the output voltage of the alternating current/direct current circuit is smaller than a preset voltage, controlling the output side of the pulse width modulation rectifier to be connected with the hydrogen production tank.
14. The apparatus of claim 13, further comprising: a controller;
the controller is used for controlling the alternating current/direct current circuit to convert alternating current output by the alternating current power supply into direct current with gradually increased voltage and charge the hydrogen production tank, and when the difference value between the output voltage of the pulse width modulation rectifier and the output voltage of the alternating current/direct current circuit is smaller than a preset voltage, the output side of the pulse width modulation rectifier is controlled to be connected with the hydrogen production tank.
15. The apparatus of claim 13, further comprising: a series switch;
the first end of the series switch is connected with the output end of the pulse width modulation rectifier, and the second end of the series switch is connected with the output end of the alternating current/direct current circuit;
the controller is specifically configured to close the series switch when a difference between the output voltage of the pulse width modulation rectifier and the output voltage of the ac/dc circuit is smaller than a preset voltage, to control the ac/dc circuit to stop working, and the output side of the pulse width modulation rectifier is connected to the hydrogen production tank through the series switch.
16. A method for producing hydrogen, wherein the method is applied to a power supply system for producing hydrogen, and the power supply system for producing hydrogen comprises: a pulse width modulation rectifier and an ac/dc circuit; the input side of the pulse width modulation rectifier and the input side of the alternating current/direct current circuit are respectively used for connecting an alternating current power supply; the output side of the pulse width modulation rectifier and the output side of the alternating current/direct current circuit are respectively used for connecting a hydrogen production tank; the pulse width modulation rectifier is used for converting alternating current of the alternating current power supply into direct current; the alternating current/direct current circuit is used for converting alternating current output by the alternating current power supply into direct current with gradually increased voltage and charging the hydrogen production tank; when the difference value between the output voltage of the pulse width modulation rectifier and the output voltage of the alternating current/direct current circuit is smaller than a preset voltage, controlling the output side of the pulse width modulation rectifier to be connected with the hydrogen production tank, wherein the method comprises the following steps:
starting the PWM rectifier and the AC/DC converter;
controlling the alternating current/direct current circuit to convert alternating current output by the alternating current power supply into direct current with gradually increased voltage and charge the hydrogen production tank;
when the difference value between the output voltage of the pulse width modulation rectifier and the output voltage of the alternating current/direct current circuit is smaller than a preset voltage, controlling the output side of the pulse width modulation rectifier to be connected with the hydrogen production tank;
and the pulse width modulation rectifier dynamically adjusts the output voltage according to the hydrogen production quantity requirement of the hydrogen production tank.
17. The method of claim 16, wherein the power system for producing hydrogen further comprises: a series switch; the first end of the series switch is connected with the output end of the pulse width modulation rectifier, and the second end of the series switch is connected with the output end of the alternating current/direct current circuit;
when the difference value between the output voltage of the pulse width modulation rectifier and the output voltage of the alternating current/direct current circuit is smaller than a preset voltage, controlling the output side of the pulse width modulation rectifier to be connected with the hydrogen production tank, and the method comprises the following steps:
and when the difference value between the output voltage of the pulse width modulation rectifier and the output voltage of the alternating current/direct current circuit is smaller than a preset voltage, the series switch is closed, and the output side of the pulse width modulation rectifier is connected with the hydrogen production tank through the series switch.
18. The method of claim 16, wherein said activating the pwm rectifier and the ac/dc converter comprises:
and starting the pulse width modulation rectifier, and starting the alternating current/direct current converter after the pulse width modulation rectifier has output voltage.
19. The method according to claim 16, wherein when the difference between the output voltage of the pwm rectifier and the output voltage of the ac/dc circuit is less than a predetermined voltage, the method further comprises:
the output voltage of the pulse width modulation rectifier is larger than the threshold voltage, and when the difference value between the output voltage of the pulse width modulation rectifier and the output voltage of the alternating current/direct current circuit is smaller than the preset voltage.
20. The method of claim 19, wherein the threshold voltage is the lowest voltage that the pwm rectifier can output after stable operation.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115642619A (en) * | 2022-10-12 | 2023-01-24 | 无锡隆基氢能科技有限公司 | Renewable energy hydrogen production system, control method thereof and storage medium |
| CN115912944A (en) * | 2023-01-12 | 2023-04-04 | 北京雷动智创科技有限公司 | Water electrolysis hydrogen production power supply, control method and hydrogen production system |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105763037A (en) * | 2016-05-16 | 2016-07-13 | 浙江工业大学 | Precharge soft starting circuit for three-phase voltage type bi-directional PWM current transformer |
| KR101926010B1 (en) * | 2018-02-28 | 2018-12-06 | 이화전기공업 주식회사 | A power converter system using new-renewable energy |
| CN109755963A (en) * | 2019-02-02 | 2019-05-14 | 中国电力科学研究院有限公司 | A kind of electrolytic hydrogen production equipment grid-connected system |
| CN210839324U (en) * | 2019-10-25 | 2020-06-23 | 天水电气传动研究所集团有限公司 | Pre-charging device for high-voltage converter |
| CN112928771A (en) * | 2021-01-11 | 2021-06-08 | 合肥工业大学 | Low-voltage high-power grid-connected hydrogen production power supply device and control method |
-
2021
- 2021-07-05 CN CN202110759167.6A patent/CN113411001B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105763037A (en) * | 2016-05-16 | 2016-07-13 | 浙江工业大学 | Precharge soft starting circuit for three-phase voltage type bi-directional PWM current transformer |
| KR101926010B1 (en) * | 2018-02-28 | 2018-12-06 | 이화전기공업 주식회사 | A power converter system using new-renewable energy |
| CN109755963A (en) * | 2019-02-02 | 2019-05-14 | 中国电力科学研究院有限公司 | A kind of electrolytic hydrogen production equipment grid-connected system |
| CN210839324U (en) * | 2019-10-25 | 2020-06-23 | 天水电气传动研究所集团有限公司 | Pre-charging device for high-voltage converter |
| CN112928771A (en) * | 2021-01-11 | 2021-06-08 | 合肥工业大学 | Low-voltage high-power grid-connected hydrogen production power supply device and control method |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115642619A (en) * | 2022-10-12 | 2023-01-24 | 无锡隆基氢能科技有限公司 | Renewable energy hydrogen production system, control method thereof and storage medium |
| CN115642619B (en) * | 2022-10-12 | 2024-04-05 | 无锡隆基氢能科技有限公司 | Renewable energy hydrogen production system, control method thereof and storage medium |
| CN115912944A (en) * | 2023-01-12 | 2023-04-04 | 北京雷动智创科技有限公司 | Water electrolysis hydrogen production power supply, control method and hydrogen production system |
| CN115912944B (en) * | 2023-01-12 | 2023-07-07 | 北京雷动智创科技有限公司 | Water electrolysis hydrogen production power supply, control method and hydrogen production system |
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