WO2016012061A1 - Système d'électrolyse - Google Patents

Système d'électrolyse Download PDF

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Publication number
WO2016012061A1
WO2016012061A1 PCT/EP2014/078195 EP2014078195W WO2016012061A1 WO 2016012061 A1 WO2016012061 A1 WO 2016012061A1 EP 2014078195 W EP2014078195 W EP 2014078195W WO 2016012061 A1 WO2016012061 A1 WO 2016012061A1
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WO
WIPO (PCT)
Prior art keywords
voltage
bridge rectifier
electrolyzer
rectifier
electrolysis system
Prior art date
Application number
PCT/EP2014/078195
Other languages
German (de)
English (en)
Inventor
Günter HEID
Peter Michael HOLZAPFEL
Thomas PFLUGFELDER
Original Assignee
Siemens Aktiengesellschaft
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 Siemens Aktiengesellschaft filed Critical Siemens Aktiengesellschaft
Publication of WO2016012061A1 publication Critical patent/WO2016012061A1/fr

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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
    • 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
    • H02M7/21—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 triode or transistor type requiring continuous application of a control signal
    • H02M7/217—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 triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • 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
    • 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

Definitions

  • Electrolysis system The invention relates to an electrolysis system comprising an electrolyser and an electrolyzer connected to the rectifier unit for supplying the electrolyzer with egg ⁇ nem direct current.
  • Electrolyzers are used by means of a direct current, a ⁇ called electrolytic conversion of materials such as to bring about a decomposition of water into hydrogen and oxygen.
  • An electrolysis system of the above type is usually connected to an alternating voltage network.
  • the rectifier unit makes it possible to generate a direct current from an alternating current, which is provided by the alternating voltage network, with which the electrolyzer can be supplied for the purpose of carrying out an electrolysis.
  • a network operator of the alternating voltage network incurs high costs, for example because the network operator has to couple devices for reactive power compensation to the AC voltage network in order to reduce network load and / or thermal energy losses.
  • An operator of the electrolysis system can also incur high costs, in particular if he has to pay the grid operator not only for a real active power, but also for the reactive power fed into the AC power grid.
  • An object of the invention is to provide a cost-saving electro ⁇ lysis system.
  • the DC ⁇ inverter unit comprises a series circuit of a first rectifier bridge and a second bridge rectifier in which.
  • the invention proceeds from the consideration that the geb syndromech- lichste form of a rectifier is a so-called bridges ⁇ rectifiers.
  • An advantage of a bridge rectifier is that it uses both a negative and a positive half-wave of an AC voltage for rectification. Unlike a midpoint rectifier, a bridge rectifier does not require a costly medium voltage tapped transformer.
  • the invention proceeds from the realization that an electrolytic system of the type mentioned, in which the rectifier unit comprises only a single bridge rectifier, during its operation connected Wech ⁇ sellaysnetz strong consequently charged a with harmonics and with a harmonic reactive power. Furthermore, with such a rectifier unit, under certain circumstances specifications of the network operator for the maximum permissible harmonic load of the AC voltage network can not be met. In order to reduce the harmonic load and hence the load reactive power, it is advantageous if the rectifier unit of at least two ⁇ bridge rectifier.
  • the invention of the finding is that, in the case that the rectifier unit comprises a series arrangement of two rectifiers, the electrolysis system during its operation, a lower reactive power generated than in the case that the rectifier unit comprises a parallel ⁇ circuit of two bridge rectifiers.
  • the electrolysis system of the invention thus causes a small reactive power load on the AC power system, making the composites ⁇ nen with the operation of the electrolysis system costs can be reduced.
  • a network operator can save costs, since due to the low reactive power load of the AC mains by the
  • Electrolysis system transformers and / or devices for reactive power compensation smaller than previously customary dimensions can be. Further, a energieef ⁇ fizienter operation of the electrolysis system is made possible by the low reactive power load on the AC voltage network.
  • the first bridge rectifier may comprise at least one switching element, in particular a controllable scarf Tele ⁇ ment and / or at least one diode.
  • the second bridge rectifier may comprise at least one switching element, the special ⁇ a controllable switching element, and / or at least one diode.
  • each of the two bridge rectifiers comprises a plurality of controllable
  • the two bridge rectifiers of the rectifier unit can be controllable rectifiers.
  • the rectifying means ⁇ uniform, a current strength of a current through the electrolyzer to a predetermined f trip- the Strömstarwert technicallystel ⁇ len, particularly, to a current value which is in a ⁇ be vorzugten working area of the electrolyzer.
  • the first bridge rectifier comprises a plurality of controllable switching elements
  • the second bridge rectifier comprises a plurality of diodes. That is, the first bridge rectifier ⁇ judge the rectifier unit can be a controllable DC be the judge and the second bridge rectifier of the rectifier unit can be a diode rectifier.
  • a rectifier unit also makes it possible to set a current intensity of a current flowing through the electrolyzer to a predefinable current value, which in particular in the preferred operating range of the
  • Electrolyzer is located. Due to a non-linear current-voltage characteristic of the electrolyzer, it is principally composed ⁇ sufficient if only one of the two B Wegenieichrichter tax has newable switching elements to the current intensity of the current flowing through the electrolyser current decisstel ⁇ len to a current value in the preferred operating range of the electrolyzer.
  • the controllable switching elements of the first and / or the second bridge rectifier are thyristors.
  • other semiconductor devices such as IGBTs (insulated-gate bipolar transistors) or MOSFETs (metal oxide-semiconductor field-effect transistors) may be provided as controllable switching elements of the first and / or the second bridge rectifier.
  • the electrolysis system may be provided for connection to a single-phase AC mains.
  • the two bridge rectifiers are expediently designed as a 2-pulse rectifier.
  • the electrolysis system is provided for connection to a three-phase alternating voltage network.
  • the two bridge rectifiers are expediently designed as a 6-pulse rectifier. That is, the series ⁇ circuit can form a 12-pulse series circuit. Furthermore, the series circuit may in principle comprise one or more additional bridge rectifiers. Consequently, the series connection can form a higher-pulse series circuit, such as an 18-pulse series circuit or 24-pulse series circuit.
  • the electrolyzer usefully has an anode. Au ⁇ ßerdem, the electrolyzer makes sense on a cathode.
  • the first bridge rectifier is connected to the cathode of the electrolyzer.
  • the second bridge rectifier is preferably connected to the anode of the electrolyzer.
  • the electrolysis system includes a Trans ⁇ formator, in particular a three-phase transformer. It is also expedient if the electrolysis system comprises a mains connection line for connecting the transformer to an AC voltage network, in particular a three-phase AC voltage network.
  • the alternating voltage network can be, for example, a medium-voltage network.
  • the switch makes it possible to disconnect the electroly ⁇ sesystem after its connection to the AC voltage network as needed from the AC voltage network and re-connect to the AC voltage network.
  • the transformer is designed as a 3-winding transformer.
  • the transformer have preferably ⁇ , a high-voltage system, a first low voltage system and a second low-voltage system.
  • the power cord is connected to the upper voltage system. Furthermore, it is expedient if the first under-voltage system is connected to the first bridge rectifier. It is also expedient if the second under-voltage system is connected to the second bridge rectifier.
  • the upper voltage system may include one or more high voltage windings.
  • the two sub-voltage systems can each have one or more undervoltage windings .
  • the upper voltage system and the two lower voltage systems each have three windings.
  • Ei ⁇ ne advantageous embodiment of the invention provides that the individual windings of the respective voltage system are interconnected causing a phase shift between a lower-side outer conductor voltage and a high-voltage side outer conductor voltage.
  • ⁇ ßigerweise the phase shift is an integral multiple of 30 °.
  • a phase shift of 0 ° or 30 ° can also be considered as an integer multiple of 30 °.
  • An external conductor voltage can be understood as a voltage between two external conductors of the respective voltage system.
  • a voltage between two outer conductors of the upper voltage system can be understood as the upper-voltage side outer conductor voltage.
  • a voltage between two outer conductors of the first and of the second undervoltage system can be understood as the low-side-side outer conductor voltage.
  • the individual windings of the respective voltage system can be interconnected causing a first phase shift between an outer conductor voltage of the first lower-voltage system and ei ⁇ ner upper-voltage-side outer conductor voltage.
  • the individual windings of the respective voltage system can send a second phase shift between a phase voltage of the second voltage system and the devisitatisseiti ⁇ gen-phase voltage are effecting interconnected. In this way, the reactive power that is the electrolyzer is generated, the ⁇ further reduced.
  • the first and the second phase shift may be identical or different from one another, in particular different multiples of 30 °.
  • the windings of the first undervoltage system can be interconnected, for example, in a star connection. Furthermore, the windings of the second under-voltage system can be interconnected eg in a delta connection. Conversely, it is possible for the windings of the first under-voltage system to be interconnected in a delta connection. Furthermore, it is possible for the windings of the second under-voltage system to be interconnected eg in a star-type circuit .
  • first bridge rectifier is expediently connected to the first under-voltage system of the transformer by means of a first transformer connecting line.
  • second bridge rectifier is connected via a second transformer connection ⁇ line to the second low voltage system of the transformer.
  • each of the two transformer connection lines comprises a switch, by means of which the respective bridge rectifier is separable from the transformer. This can be achieved that the
  • Bridge rectifier can be separated separately from the transformer.
  • each of the two transformer leads may include an electrical fuse or a parallel connection of multiple electrical fuses.
  • the second bridge rectifier is connected to at least one capacitor on the alternating voltage side. It is further expedient if the capacitor is connected to the second under-voltage system of the transformer.
  • the capacitor can be used to receive an electrical power from the AC mains and / or to feed it into the AC mains, in particular for the purpose of reducing a reactive power in the AC voltage. voltage grid.
  • the second bridge rectifier is connected to the AC side with three capacitors.
  • the electrolysis system has a control unit.
  • the control unit in turn may comprise a ramp-function generator.
  • the STEU ⁇ erritt is adapted to control the switching elements of the rectifier unit.
  • the Steuerein ⁇ ness may be adapted to control the switching states Heidelbergelemen ⁇ te.
  • control unit can be designed as a control. That is, the control unit may have a feedback feedback.
  • the control unit can be used in particular to regulate the direct current with which the electrolyzer is supplied. In this case, for example, the method of so-called phase control can be used.
  • the electrolysis system comprises at least egg ⁇ NEN AC converter for detecting a current intensity of an alternating current with which the first bridge rectifier provides comparable is.
  • the AC converter is connected to the control unit.
  • the electrolysis system may include a DC-DC converter for determining a DC current that is generated by the series connection. It makes sense to connect the DC-DC converter to the control unit.
  • the rectifier unit comprises a further series connection of two bridge rectifiers.
  • the further series circuit is connected to the electrolyzer.
  • the further series connection for the series connection of the first bridge rectifier and second bridge rectifier Bridge rectifier is connected in parallel.
  • one of the two bridge rectifiers of the further series connection is connected to the first under-voltage system of the transformer. Furthermore, it is expedient if this bridge rectifier is configured identically to the first bridge rectifier of the first-mentioned series circuit.
  • the aforementioned control unit is adapted to said bridge rectifier ⁇ ter the further series circuit or its controllable
  • the other of the two bridge rectifiers of the further series connection is preferably connected to the second under-voltage system of the transformer.
  • the latter bridge rectifier is expediently configured identically to the second bridge rectifier of the first-mentioned series connection.
  • the electrolysis system comprises a first Lei ⁇ accounting system which is connected to the first-mentioned series circuit. Furthermore, electrolysis system expediently comprises a second line system, which is connected to the further series connection. Conveniently, the two Lei ⁇ systems are resistive. In particular, both line systems may have the same ohmic resistances. Except ⁇ said series circuit and the other series circuit are advantageously connected to each other at the electrolyser, especially at both the anode and at the cathode.
  • the invention relates to a method for operating an electrolysis system, in which an electrolyzer with a rectifier unit is supplied with a direct current.
  • this electrolysis system may be, in particular, the inventive electrolysis system or ei ⁇ ner of its developments described above.
  • the direct current is generated by means of a series circuit comprising a first bridge rectifier and a second bridge rectifier.
  • sense electrolyzer is part of the Elect ⁇ rolysesystems.
  • rectifier unit is useful as a ⁇ full components of the electrolysis system.
  • the first bridge rectifier ⁇ judge is thereby driven such that the direct current having a predetermined current intensity. It makes sense to drive the first bridge rectifier or its controllable switching elements by means of a control unit.
  • the rectifier unit is expediently supplied with an alternating voltage.
  • the rectifier unit is supplied with the AC voltage using a transformer.
  • the AC voltage is adjusted by means of the transformer so that an electric power that is converted by the electrolyzer, over a predetermined period of operation of ⁇ electrolyzer and / or at varying Be ⁇ operating temperature of the electrolyzer constant or essential ⁇ is kept constant.
  • the first bridge rectifier is connected to the transformer by means of a switch.
  • the first bridge rectifier is controlled such that a direct current is generated by the series circuit whose current is increased according to a predetermined function, in particular starting at zero.
  • the amperage of the DC current is increased until the electrolyzer by a current having a predetermined current value flows and / or bears a predetermined voltage at the electrolyzer.
  • the second bridge rectifier ⁇ judge is then connected to the transformer by means of a further switch.
  • the first bridge rectifier is expediently controlled in such a way that a voltage applied to the electrolyzer is kept constant.
  • the first bridge rectifier is advantageously controlled in such a way that the current intensity of the direct current generated by the series circuit drops below a predetermined current value.
  • the second bridge rectifier is subsequently separated from the transformer by means of the further switch.
  • the first bridge rectifier is expediently set in a blocking state.
  • the first bridge rectifier is disconnected using the switch from the Trans ⁇ formator then.
  • the electrolysis system according to the invention in particular one of its developments described above, can be used inter alia for power stabilization in an AC voltage network.
  • an active power in the AC power supply system is kept below a predetermined power limit, in particular in times when de ⁇ NEN a force factory exceeds the alternating voltage network fed-in active power, a consumer side unreacted active ⁇ performance.
  • the electrolysis ⁇ system expediently an active power from the alternating ⁇ pan Vietnamesesnetz on. It is also expedient if a DC power is generated by means of the rectifier unit using this active power.
  • the direct current power in turn can be used to carry out an electrolysis process by means of the electrolyzer.
  • FIG. 1 shows an electrolysis system with a rectifier unit, which comprises two series circuits of two bridge rectifiers with controllable switching elements;
  • FIG. 2 shows another electrolysis system with a rectifier unit, which comprises two series circuits, each of which is a bridge rectifier with controllable switching elements and a bridge rectifier with diodes.
  • the electrolysis system 2 includes an electrolyzer with an anode 4 and a cathode 6 8 further comprises Elect ⁇ rolysesystem 2, connected to the electrolyzer 4
  • Rectifier unit 10 for supplying the electrolyzer 4 with a direct current.
  • the electrolysis system 2 comprises a transformer 12, through which the electrolyzer 4 is coupled to an AC voltage network 14. In the present embodiment, it is in the AC ⁇ network 14 to a three-phase medium-voltage network.
  • the rectifier unit 10 comprises a first series scarf ⁇ tung 16 of a first bridge rectifier 18 and a second bridge rectifier 20 and a second series circuit 22 of a third bridge rectifier 24 and a fourth bridge rectifier 26. Both series circuits 16, 22 are connected to the electrolyzer 4 and connected in parallel with each other.
  • the first and the third bridge rectifiers 18, 24 are each connected by an electrolyzer connecting line 28 to the cathode 8 of the electrolyzer 4, wherein the electrolyzer connecting lines 28 are connected to each other at the cathode 8.
  • the second and the fourth bridge rectifiers 20, 26 each through an electrolytic uranium-circuit line 30 to the anode 6 of the electrolyzer 4 ver ⁇ connected, the latter electrolysis uranium circuit lines 30 are connected to each other at the anode. 6
  • first and the second bridge rectifier 18, 20 are connected to each other by a connecting line 32.
  • third and the fourth bridge rectifier 24, 26 are connected to each other by a further connecting line 34.
  • the four bridge rectifier 18, 20, 24, 26 are configured as a 6-pulse rectifier and in each case comprise three parallel-connected phase legs 36.
  • Each of these Pha ⁇ senzweige 36 comprises two mutually series-connected steu ⁇ newable switching elements 38. That is, the four bridges ⁇ rectifiers 18, 20, 24, 26 are controllable rectifier.
  • the controllable switching elements 38 are thyristors.
  • each of the phase branches 36 is connected between its controllable switching elements 38 with a connection string 40.
  • the transformer 12 is configured as a 3-winding transformer having a top voltage system 42 and a first undervoltage system 44 and a second undervoltage system 46, each of these three
  • Voltage systems 42, 44, 46 each comprises three windings.
  • the upper voltage system 42 of the transformer 12 is connected to the AC voltage network 14 through a three-phase power supply line 48.
  • the power supply line 48 includes a switch 50, by means of which the transformer 12 can be disconnected from the AC voltage network 14 and reconnected to the AC voltage network 14.
  • the switch 50 has a ground connection 52, by means of which the upper voltage system 42 can be set to ground potential when the transformer 12 is disconnected from the AC voltage network 14.
  • the first under-voltage system 44 is connected to a first transformer connecting line 54 and the second under-voltage system 46 is connected to a second transformer connecting line 56.
  • Both Transformatoran gleichlei ⁇ obligations 54, 56 each comprise three phase lines 58th
  • each of the three phase lines 58 of the first transformer connecting line 54 has two branches 60, one of which can be connected to the first bridge rectifier 18 and the other can be connected to the third bridge rectifier 24.
  • each of the three phase lines 58 of the second transformer connection line 56 has two branches 60, one of which can be connected to the second bridge rectifier 20 and the other can be connected to the fourth bridge rectifier 26.
  • each of the branches 60 comprises a parallel ⁇ circuit by two individual wires 62, each having a fuse 64.
  • the branches 60 al ⁇ ternatively each comprise a parallel connection of more than two individual wires 62 or only a single individual wire 62 .
  • each of the branches 60 in each case comprises a switch 66, by means of which the respective branch 60 can be connected to or separated from one of the phase strands 40.
  • the electrolysis system 2 has a control unit 68 with an integrated ramp-function generator, wherein the control unit 68 is designed in particular as a control. By means of the control unit 68, switching states of the switching elements 38 are controlled.
  • control unit 68 is used to regulate a direct current, with which the electrolyzer 4 is supplied by the rectifier unit 10.
  • the electrolysis system 2 has two AC converters 70 and a DC converter 72.
  • the AC converters 70 are arranged on different phase lines 58 of the first transformer connecting line 54. Is disposed whereas the DC-DC converter 72 to the connection line 32 through which the first Brü ⁇ cken SharePointrichter 18 is connected to the second bridge rectifier 20th
  • the current transformers 70, 72 are connected to the control unit 68.
  • the ac converters 70 are each used to determine an amperage of an alternating current flowing through the respective phase line 58 of the first transformer lead 54.
  • the DC ⁇ converter 72 is used to determine a current value of a through the connection line 32 through which the first bridge rectifier 18 connected to the second bridge rectifier 20, DC current flowing.
  • the lines connected to the first series circuit 16 and the lines corresponding to them which are connected to the second series circuit 22 have the same ohmic resistances.
  • the connected to the ers ⁇ th sub-voltage system 44 lines and the corresponding lines which are connected to the second low voltage system 46 like ohmic resistors. This allows equal DC currents to flow through the two series circuits 16, 22 when the controls 38 of the first series circuit 16 and the control elements 38 of the second series circuit 22 are driven synchronously or at a predetermined time interval.
  • the electrolysis system 2 is used for power stabilization in the AC voltage network 14. In the butterstabili ⁇ tion an active power is maintained in the alternating voltage network 14 below a predetermined power limit. For this purpose, the electrolysis system 2 receives an active power from the AC voltage network 14. Using this active power, DC power is generated by the rectifier unit 10. The DC power in turn is used to carry out an electrolysis process by means of the electrolyzer 4.
  • the rectifier unit 10 is supplied with an AC voltage using the transformer 12.
  • the controllable switching elements 38 of the bridge rectifier 18, 20, 24, 26 ei ⁇ ne electrical power, which is converted by the electrolyzer 4 set to a predetermined power value.
  • ⁇ at the controllable switching elements 38 from the control unit 68 are controlled in such a way that the direct current having a given before ⁇ current.
  • the change of tension ⁇ voltage with which the rectifier unit 10 is supplied is with- help of the transformer 12 set such that the electric power is converted by the electrolyzer, a predetermined accumulated operation time of the electric ⁇ lyseurs 4 of time and at varying operating temperature the electrolyzer 4 is kept substantially constant.
  • FIG. 2 shows a circuit diagram of another electrolysis system 74.
  • the following description is in Wesent ⁇ union on the differences from the previous execution ⁇ example, reference is made to remain the same features and functions. Like reference numerals are used in the two figures, these strainszei ⁇ chen designate like or corresponding elements substantially.
  • the further electrolysis system 74 from FIG. 2 differs from the electrolysis system 2 from FIG. 1 in that the second and the fourth bridge rectifier 20, 26
  • Diode rectifier are and thus have instead of the controllable switching elements diodes 76. That is, only the first and third bridge rectifiers 18, 24 are controllable rectifiers. Accordingly, only the first and the third bridge rectifier 18, 24, more precisely their control elements 38, are controlled by the control unit 68.
  • the further electrolysis system 74 comprises three capacitors 78. These are each connected to one of the phase lines 58 of the second transformer connecting line 56. Thus, the capacitors 78 are connected to the second and fourth bridge rectifiers 20, 26 and to the second under voltage system 46 of the transformer 12. The capacitors 78 are used to reduce a reactive power in the AC voltage network 14 by the capacitors 78 receive an electrical power from the AC voltage network 14 and / or feed into the AC voltage network 14.
  • the individual windings of the respective voltage system 42, 44, 46 of the transformer 12 are interconnected causing a first phase shift between an outer conductor voltage of the first lower-voltage system 44 and an outer conductor voltage of the upper-voltage system 42.
  • the individual windings of the respective voltage system 42, 44, 46 are interconnected causing a second phase shift between an outer conductor voltage of the second lower-voltage system 46 and an outer conductor voltage of the upper-voltage system 42.
  • the first phase shift is 0 ° and the second phase shift is 30 °.
  • the first and third bridge rectifier 18, 24 For connecting the electrolyzer 4 to the AC mains ⁇ 14 are the first and third bridge rectifier 18, 24 using the switch 66 of the first Transformatoran- End line 54 connected to the transformer 12.
  • the first and the third bridge rectifier 18, 24 are driven in such a way that a direct current is generated by both series circuits 16, 22, the current strength is increased GE increasing starting from zero to a predetermined function until by the electrolyzer 4 a current with a predetermined current flows.
  • the second and the fourth bridge rectifier 20, 26 by means of
  • the first and third bridge rectifiers 18, 24 are driven such that the voltage present at 4 electrolyzer voltage is kept constant ge ⁇ .
  • the first and third bridge rectifier 18, 24 controlled such that the current intensity of the litis from each ⁇ series circuit 16, 22 generated DC current falls below a predetermined current value.
  • the advertising of the second and fourth bridge rectifiers 20, 26 of the switch 66 of the second transformer connection line 56 using ⁇ separated from the transformer 12th In this way, the first and the third bridge rectifier 18, placed in a blocking state 24, in particular in that the direct currents fall below a holding current threshold of the thyristors from ⁇ .
  • the first and the third bridge rectifiers 18, 24 are disconnected from the transformer 12 by means of the switches 66 of the first transformer connecting line 54.

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  • Chemical & Material Sciences (AREA)
  • Engineering & Computer Science (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Electrochemistry (AREA)
  • Materials Engineering (AREA)
  • Metallurgy (AREA)
  • Organic Chemistry (AREA)
  • Power Engineering (AREA)
  • Automation & Control Theory (AREA)
  • Rectifiers (AREA)

Abstract

L'invention concerne un système d'électrolyse (2; 74) présentant un électrolyseur (4) et une unité redresseur (10) reliée à l'électrolyseur (4) et destinée à l'alimentation de l'électrolyseur (4) en courant continu. Pour obtenir un système d'électrolyse (2; 74) rentable du type susmentionné, l'invention propose que l'unité redresseur (10) comprenne un montage série (16) composé d'un premier pont redresseur (18) et d'un deuxième pont redresseur (20).
PCT/EP2014/078195 2014-07-22 2014-12-17 Système d'électrolyse WO2016012061A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
EP14178065.0 2014-07-22
EP14178065 2014-07-22

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WO2016012061A1 true WO2016012061A1 (fr) 2016-01-28

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Publication number Priority date Publication date Assignee Title
CN108649815A (zh) * 2018-05-02 2018-10-12 哈尔滨工业大学（威海） 采用直流侧双无源谐波抑制方法的36脉波整流器
CN108649806A (zh) * 2018-05-02 2018-10-12 哈尔滨工业大学（威海） 一种用于多脉波整流器的电子电力移相变压器
CN114761619A (zh) * 2019-11-28 2022-07-15 西门子能源环球有限责任两合公司 用于将水分解成氢气和氧气的电解系统以及用于电解系统的运行方法
WO2022253704A1 (fr) * 2021-06-01 2022-12-08 Convertertec Deutschland Gmbh Ensemble circuit et procédé pour fournir de l'énergie électrique pour de grandes charges de courant continu
WO2023186260A1 (fr) * 2022-03-28 2023-10-05 Hitachi Energy Switzerland Ag Convertisseur multiniveau modulaire couplé par transformateur en tant que redresseur pour électrolyseur d'hydrogène
CN117353267A (zh) * 2023-10-12 2024-01-05 武汉理工大学 基于离网运行条件下的氢能综合利用系统的控制方法

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