WO2024075239A1 - 電源装置 - Google Patents

電源装置 Download PDF

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Publication number
WO2024075239A1
WO2024075239A1 PCT/JP2022/037416 JP2022037416W WO2024075239A1 WO 2024075239 A1 WO2024075239 A1 WO 2024075239A1 JP 2022037416 W JP2022037416 W JP 2022037416W WO 2024075239 A1 WO2024075239 A1 WO 2024075239A1
Authority
WO
WIPO (PCT)
Prior art keywords
power supply
supply device
output terminal
power
filter circuit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Ceased
Application number
PCT/JP2022/037416
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
崇史 冨田
智宏 長谷川
一浩 臼木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Toshiba Mitsubishi Electric Industrial Systems Corp
Original Assignee
Toshiba Mitsubishi Electric Industrial Systems Corp
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Toshiba Mitsubishi Electric Industrial Systems Corp filed Critical Toshiba Mitsubishi Electric Industrial Systems Corp
Priority to JP2024555547A priority Critical patent/JPWO2024075239A1/ja
Priority to PCT/JP2022/037416 priority patent/WO2024075239A1/ja
Priority to US18/837,646 priority patent/US20250141341A1/en
Publication of WO2024075239A1 publication Critical patent/WO2024075239A1/ja
Anticipated expiration legal-status Critical
Ceased legal-status Critical Current

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Classifications

    • 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
    • H02M1/14—Arrangements for reducing ripples from DC input or output
    • 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
    • H02M1/14—Arrangements for reducing ripples from DC input or output
    • H02M1/143—Arrangements for reducing ripples from DC input or output using compensating arrangements
    • 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
    • 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
    • H02M3/00—Conversion of DC power input into DC power output
    • H02M3/02—Conversion of DC power input into DC power output without intermediate conversion into AC
    • H02M3/04—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters
    • H02M3/10—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M3/155—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H02M3/156—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
    • H02M3/158—Conversion of DC power input into DC power output without intermediate conversion into AC by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
    • 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
    • H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
    • H02M1/007—Plural converter units in cascade
    • 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
    • H02M3/00—Conversion of DC power input into DC power output
    • 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
    • H02M7/06—Conversion of AC power input into DC power output without possibility of reversal by static converters using discharge tubes without control electrode or semiconductor devices without control electrode
    • 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

Definitions

  • An embodiment of the present invention relates to a power supply device that supplies power to an electrolyzer in a hydrogen production plant.
  • the electrolytic cell in the hydrogen production plant is equipped with a large number of cells.
  • Each of these cells has, for example, an anode and a cathode, and a partition such as an ion exchange membrane is provided between the anode and the cathode. These cells are connected in series and further in parallel to form the electrolytic cell.
  • the efficiency of the electrolysis reaction changes depending on the magnitude of the current supplied to the electrolytic cell. There is a demand for power supplies to output a current with a larger value.
  • a power supply device with a self-excited power conversion circuit can reduce the size of the components that make up the power supply device by increasing the switching frequency. For example, the inductance value required for the reactor on the output side of the power supply device can be reduced by increasing the switching frequency, making it possible to reduce the size of the reactor.
  • the current output by a power supply contains a ripple current that depends on the switching frequency.
  • the ripple current superimposed on the output current is determined by the inductance value of the output reactor and the switching frequency.
  • the objective is to obtain a power supply device that can supply low ripple current to an electrolytic cell in a hydrogen production plant.
  • the power supply device supplies DC power to an electrolytic cell that generates hydrogen by electrolysis.
  • the power supply device includes a self-excited power converter having a first output terminal and a second output terminal that outputs a positive voltage with respect to the first output terminal, a reactor connected in series to at least one of the first output terminal and the second output terminal, and a filter circuit connected between the anode and cathode of the electrolytic cell.
  • the filter circuit is a low-pass filter. The cutoff frequency of the filter circuit is set lower than the switching frequency of the power converter.
  • a power supply device is realized that can supply a low ripple current to an electrolyzer in a hydrogen production plant.
  • FIG. 1 is a schematic block diagram illustrating a power supply device according to a first embodiment.
  • FIG. 2 is a schematic block diagram illustrating a power supply device according to the second embodiment.
  • FIG. 3 is a schematic block diagram for explaining the operation of the power supply device according to the second embodiment.
  • FIG. 1 is a schematic block diagram illustrating a power supply device according to a first embodiment. 1 shows, in addition to the power supply device 100 according to this embodiment, an electrolytic cell 70 that produces hydrogen by receiving power from the power supply device 100 as a load.
  • the electrolytic cell 70 is connected to the output of the power supply device 100 via an anode terminal 71p and a cathode terminal 71n.
  • the power supply device 100 is connected to an AC power source 1.
  • the AC power source 1 outputs three-phase AC.
  • the power supply device 100 converts the AC power supplied from the AC power source 1 into DC power and supplies it to the electrolytic cell 70.
  • the power supply device 100 supplies power to the electrolytic cell 70 by appropriately switching between constant current control, constant power control, and constant voltage control, for example, depending on the state of the electrolysis reaction in the electrolytic cell 70.
  • the configuration of the power supply device 100 will be described.
  • the power supply device 100 includes a power converter 30, reactors 41 to 44, and a filter circuit 60.
  • the power supply device 100 further includes a rectifier circuit 10 and a smoothing capacitor 20.
  • the power converter 30 has output terminals 32p and 32n.
  • a positive bus bar 50p is connected to the output terminal 32p.
  • the output terminal 32p is connected to an anode terminal 71p of the electrolytic cell 70 via the bus bar 50p.
  • the output terminal 32n is connected to a negative bus bar 50n.
  • the output terminal 32n is connected to a cathode terminal 71n of the electrolytic cell 70 via the bus bar 50n.
  • Reactors 41 and 42 are connected in series to the positive busbar 50p.
  • Reactors 43 and 44 are connected in series to the negative busbar 50n.
  • the busbars 50p and 50n are parallel conductors stacked with an insulating material between them, for example, laminated busbars.
  • the reactors are divided and arranged for each busbar, as in this example. By dividing and arranging the reactors and making the busbars 50p and 50n parallel conductors, the effect of parasitic inductance due to the arrangement of the busbars can be reduced.
  • the filter circuit 60 is connected between the positive bus bar 50p and the negative bus bar 50n. That is, the filter circuit 60 is connected between the output of the power converter 30 and the electrolytic cell 70.
  • one bus of the filter circuit 60 is connected to the connection node between the reactor 41 and the reactor 42, and the other bus of the filter circuit is connected to the connection node between the reactor 43 and the reactor 44.
  • the connection point of the filter circuit 60 is not limited to the above, as long as it is connected to a position where the ripple current flowing through the reactor can be bypassed.
  • one bus of the filter circuit 60 may be connected between the reactor 42 and the anode terminal 71p, and between the reactor 44 and the cathode terminal 71n.
  • the filter circuit 60 includes a resistor 62 and a capacitor 64.
  • the resistor 62 and the capacitor 64 are connected in series.
  • the series circuit of the resistor 62 and the capacitor 64 is connected to the positive bus bar 50p by the positive bus 66p.
  • the series circuit of the resistor 62 and the capacitor 64 is connected to the negative bus bar 50n by the negative bus 66n.
  • the positive bus 66p and the negative bus 66n are preferably parallel conductors stacked with an insulating material between them, for example, laminated bus bars. By making the positive bus 66p and the negative bus 66n parallel conductors, the effect of the parasitic inductance of the buses can be reduced.
  • the filter circuit 60 is a low-pass filter consisting of a series circuit of a resistor 62 and a capacitor 64.
  • the cut-off frequency of the low-pass filter is set to a value lower than the switching frequency of the power converter 30.
  • the cut-off frequency of the low-pass filter is set to a value lower than the multiplexed switching frequency.
  • the cut-off frequency of the filter circuit 60 is set by the resistance value of the resistor 62 and the capacitance value of the capacitor 64.
  • the rectifier circuit 10 is connected to the AC power source 1 via the AC input terminals 11a to 11c.
  • the rectifier circuit 10 rectifies the three-phase AC voltage input from the AC power source 1, converts it to a pulsating current, and outputs it to the smoothing capacitor 20.
  • the smoothing capacitor 20 is connected via the output terminals 12p, 12n of the rectifier circuit 10.
  • the smoothing capacitor 20 converts the pulsating current output from the rectifier circuit 10 into a DC voltage, and outputs it to the power converter 30.
  • the power supply device 100 converts the AC power output by the AC power source 1 into DC power and outputs the DC power to the electrolytic cell 70.
  • the power supplied to the power converter 30 is not limited to that supplied by the AC power source 1 as in this example, but may be DC power.
  • the output of a solar power generation device may be connected to the input of the power converter 30.
  • the power converter 30 converts the DC power output from the smoothing capacitor 20 into the desired current value, voltage value, or power value and supplies it to the electrolytic cell 70.
  • the power converter 30 has, for example, a chopper-type conversion circuit, for example, a step-down chopper circuit. It is preferable that the conversion circuit of the power converter 30 is a type that reduces the ripple component of the output current.
  • the reactors 41 to 44 connected to the output of the power converter 30 function as choke coils for the step-down chopper circuit. From the viewpoint of reducing the ripple current, it is preferable to set the inductance value of the reactors 41 to 44 to a large value.
  • the power supply device 100 includes a filter circuit 60 at its output.
  • the power supply device 100 supplies DC power to the electrolytic cell 70 via the filter circuit 60.
  • the filter circuit 60 has a cutoff frequency that is set lower than the switching frequency of the power converter 30. Therefore, the filter circuit 60 bypasses a ripple current whose one period is the reciprocal of the switching frequency of the power converter 30.
  • the power supply device 100 can avoid flowing a ripple current into the electrolytic cell 70.
  • the filter circuit 60 can bypass the ripple current, suppressing deterioration of the electrodes of the electrolytic cell due to the ripple current and extending the life of the electrodes.
  • a filter circuit is used to reduce the ripple component of the output current, so there is no need to increase the inductance value of the reactors 41 to 44, and the device can be made smaller.
  • the output is provided with a filter circuit 60, there is no need to increase the switching frequency of the power converter 30 to reduce the ripple current. This makes it possible to prevent a decrease in power conversion efficiency due to an increase in switching loss caused by increasing the switching frequency.
  • FIG. 2 is a schematic block diagram illustrating a power supply device according to the second embodiment.
  • the configuration of the filter circuit 260 is different from that of the power supply device 100 according to the first embodiment.
  • the power supply device 200 according to this embodiment has the same configuration as the power supply device 100 according to the first embodiment, and the same components are denoted by the same reference numerals and detailed descriptions thereof will be omitted as appropriate.
  • the power supply device 200 includes a power converter 30, reactors 41-44, and a filter circuit 260.
  • the power supply device 200 further includes a rectifier circuit 10 and a smoothing capacitor 20, and converts AC power supplied from a three-phase AC power source 1 into DC power and outputs it to the electrolytic cell 70.
  • the filter circuit 260 is connected between the positive bus bar 50p and the negative bus bar 50n, as in the power supply device 100 according to the first embodiment. In other words, the filter circuit 260 is connected between the output of the power converter 30 and the electrolytic cell 70.
  • the filter circuit 260 includes a resistor 62, a capacitor 64, and a diode 268.
  • the resistor 62 and the capacitor 64 are connected in series.
  • the diode 268 is connected in parallel to the series circuit of the resistor 62 and the capacitor 64.
  • the anode of the diode 268 is connected to the negative bus 66n.
  • the cathode of the diode 268 is connected to the positive bus 66p. In the event of a short circuit in the load, the diode 268 bypasses the current flowing through the reactors 41 to 44, preventing excessive voltage from being applied to the filter circuit 260.
  • FIG. 3 is a schematic block diagram for explaining the operation of the power supply device according to the second embodiment.
  • the operation of the power supply device 200 according to this embodiment will be described with reference to FIG. 3, diode 268 of filter circuit 260 operates when electrolytic cell 70 is short-circuited.
  • the low-pass filter formed of a series circuit of resistor 62 and capacitor 64 operates when electrolytic cell 70 is normal, and its operation is similar to that of filter circuit 60 of power supply device 100 according to the first embodiment, so a detailed description thereof will be omitted.
  • the power supply unit 200 outputs DC power to the load until the electrolytic cell 70 is short-circuited. Therefore, current flows through the reactors 41 to 44 in the direction into the anode of the electrolytic cell 70 and the direction out of the cathode.
  • the effects of the power supply device 200 according to this embodiment will be described.
  • the power supply device 200 according to this embodiment has the same effects as the power supply device 100 according to the first embodiment.
  • the filter circuit 260 has a diode 268. Without this diode 268, if the electrolytic cell 70 were to short-circuit, the capacitor 64 would be discharged and then charged with reverse polarity, so that an excessively large reverse voltage would be applied to the capacitor 64, which would also affect the output of the power supply device 200.
  • the diode 268 bypasses the charging current to the capacitor 64 in the event of a short circuit, preventing the problem from spreading to the power converter 30. Therefore, even if a short circuit occurs due to a failure of a cell in the electrolytic cell 70 or a fault in the connection of wiring, etc., the power supply device 200 can be safely protected.
  • a power supply device is realized that can supply low ripple current to the electrolyzer of a hydrogen production plant.

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Chemical & Material Sciences (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Electrolytic Production Of Non-Metals, Compounds, Apparatuses Therefor (AREA)
PCT/JP2022/037416 2022-10-06 2022-10-06 電源装置 Ceased WO2024075239A1 (ja)

Priority Applications (3)

Application Number Priority Date Filing Date Title
JP2024555547A JPWO2024075239A1 (https=) 2022-10-06 2022-10-06
PCT/JP2022/037416 WO2024075239A1 (ja) 2022-10-06 2022-10-06 電源装置
US18/837,646 US20250141341A1 (en) 2022-10-06 2022-10-06 Power supply device

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
PCT/JP2022/037416 WO2024075239A1 (ja) 2022-10-06 2022-10-06 電源装置

Publications (1)

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WO2024075239A1 true WO2024075239A1 (ja) 2024-04-11

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PCT/JP2022/037416 Ceased WO2024075239A1 (ja) 2022-10-06 2022-10-06 電源装置

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JP (1) JPWO2024075239A1 (https=)
WO (1) WO2024075239A1 (https=)

Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07143757A (ja) * 1993-11-15 1995-06-02 Toshiba Corp 電圧形インバータ装置
JPH099622A (ja) * 1995-06-16 1997-01-10 Toshiba Corp インバータ電源装置
JP2002233157A (ja) * 2001-02-01 2002-08-16 Toshiba Corp 電源装置
KR20030043817A (ko) * 2003-03-18 2003-06-02 (주)이투오 수소·산소 가스 발생기의 파워팩
JP2015537116A (ja) * 2012-10-05 2015-12-24 ミオックス コーポレーション トランスレス方式のオンサイト生成

Family Cites Families (11)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07298627A (ja) * 1994-04-27 1995-11-10 Toshiba Corp 電力変換器の制御装置
JPH09117066A (ja) * 1995-10-18 1997-05-02 Sanyo Electric Co Ltd 系統連系電源システム
JP4063476B2 (ja) * 2000-05-30 2008-03-19 ニチコン株式会社 過電圧保護回路
JP4471155B2 (ja) * 2004-03-23 2010-06-02 東芝三菱電機産業システム株式会社 電力変換装置及びこの保護方法
JP4557251B2 (ja) * 2004-11-10 2010-10-06 東芝三菱電機産業システム株式会社 電源装置
JP5916390B2 (ja) * 2012-01-10 2016-05-11 株式会社アイ・ライティング・システム 電源ユニット及びそれを用いたｌｅｄ照明装置
JP6919506B2 (ja) * 2017-11-02 2021-08-18 富士通株式会社 電解システム、電解制御装置及び電解システムの制御方法
GB2571058B (en) * 2017-11-28 2020-06-10 Univ Limerick An integrated switching regulator device using mixed-core inductors
FI128052B (en) * 2018-04-16 2019-08-30 Lappeenrannan Teknillinen Yliopisto A power converter for a bioelectrochemical system
ES2987451T3 (es) * 2021-01-12 2024-11-14 Dynelectro Aps Sistemas de conversión de potencia para pilas de electrólisis
GB2620573A (en) * 2022-07-11 2024-01-17 Univ Oxford Innovation Ltd Optimisation of control of reactive circuit for generating electromagnetic pulses

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH07143757A (ja) * 1993-11-15 1995-06-02 Toshiba Corp 電圧形インバータ装置
JPH099622A (ja) * 1995-06-16 1997-01-10 Toshiba Corp インバータ電源装置
JP2002233157A (ja) * 2001-02-01 2002-08-16 Toshiba Corp 電源装置
KR20030043817A (ko) * 2003-03-18 2003-06-02 (주)이투오 수소·산소 가스 발생기의 파워팩
JP2015537116A (ja) * 2012-10-05 2015-12-24 ミオックス コーポレーション トランスレス方式のオンサイト生成

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US20250141341A1 (en) 2025-05-01
JPWO2024075239A1 (https=) 2024-04-11

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