WO2023052000A1 - Ensemble comprenant au moins deux alimentations sans coupure et son procédé de fonctionnement - Google Patents

Ensemble comprenant au moins deux alimentations sans coupure et son procédé de fonctionnement Download PDF

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Publication number
WO2023052000A1
WO2023052000A1 PCT/EP2022/073265 EP2022073265W WO2023052000A1 WO 2023052000 A1 WO2023052000 A1 WO 2023052000A1 EP 2022073265 W EP2022073265 W EP 2022073265W WO 2023052000 A1 WO2023052000 A1 WO 2023052000A1
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WO
WIPO (PCT)
Prior art keywords
uninterruptible power
power supplies
energy
supply
voltage
Prior art date
Application number
PCT/EP2022/073265
Other languages
German (de)
English (en)
Inventor
Thomas Senft
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
Priority to EP22768676.3A priority Critical patent/EP4388635A1/fr
Publication of WO2023052000A1 publication Critical patent/WO2023052000A1/fr

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Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J9/00—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting
    • H02J9/04—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source
    • H02J9/06—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems
    • H02J9/061—Circuit arrangements for emergency or stand-by power supply, e.g. for emergency lighting in which the distribution system is disconnected from the normal source and connected to a standby source with automatic change-over, e.g. UPS systems for DC powered loads

Definitions

  • the invention relates to an arrangement comprising at least two uninterruptible power supplies according to patent claim 1 and a method for operating them according to patent claim 8 .
  • Uninterruptible power supplies are often used to ensure that the electrical system can be operated independently of faults and failures in the system's power supply network. These are sometimes also referred to as "Uninterruptable Power Supply” or “UPS systems” .
  • the uninterruptible power supply is used to provide an auxiliary power supply for the electrical system in the event of a fault or failure of the normal power supply.
  • Uninterruptible power supplies are known, for example, from EP 3 422 531 A1, WO 2018/172397 A1, EP 3 618 219 B1, EP 2 787 405 B1 and EP 2 790 291 A1.
  • power supplies are installed today for their energy supply, which are fed from a three-phase power supply network, in particular a three-phase system, and supply a direct current output voltage (e.g. 24 volt direct current) to supply the system.
  • Modern electronic power supplies are usually designed as clocked power supplies or switch mode parts (sometimes referred to as switched-mode power supplies) are formed. Such clocked power supplies or. Switched-mode power supplies are known, for example, from EP 3 544 166 A1 and EP 3 451 476 A1.
  • the power supply network Such a power supply thus provide a (basic) voltage supply that is present at an input of the uninterruptible power supply.
  • the uninterruptible power supply usually includes an input for connection to the (basic) voltage supply, an output for connection to an electrical load and at least one energy store.
  • the uninterruptible power supply is designed in such a way that, when a normal voltage is present at the input, it electrically connects both the input and the output, in order to supply the electrical load with current from the voltage supply, and also electrically connects the input with the energy store, in order to to load or to keep loaded. If the voltage at the input fails or malfunctions (e.g. falling below a threshold value), it electrically connects the energy store to the output in buffer mode in order to supply the electrical load with electricity from the energy store. In the best-case scenario, the disruption or failure is remedied within the possible buffer mode and the power supply to the load can then be maintained without or almost without interruption.
  • a normal voltage is, for example, a voltage that lies within a defined permissible range.
  • one or more electrical components can also be connected into the electrical connection between the input and the output, e.g. B. a tension or current sensor .
  • the uninterruptible power supply typically includes a base unit and the energy store for this purpose.
  • the energy store usually includes one or more accumulator modules.
  • An accumulator is a rechargeable storage device for electrical energy, typically based on an electrochemical system, which converts electrical energy into chemical (storage) energy when charging and converts it back into electrical energy when discharging.
  • Accumulator types are usually designated according to the materials used in each case. Known accumulator types are, for example, lithium-ion accumulators, lead-acid accumulators, etc.
  • a synonym for the term accumulator or battery for short is also the term rechargeable battery or battery are used.
  • the basic unit of the uninterruptible power supply comprises the input for connection to the power supply and the output for connection to the electrical load as mentioned above. Furthermore, the basic unit usually includes a switching unit, a charging and/or discharging unit and a control unit (see, for example, EP 3 618 219 B1).
  • the charging and / or discharging unit is for the targeted charging and / or discharging the battery module or. of the accumulator modules used.
  • the control unit is used to control the charging and/or discharging unit. In the event of a fault or failure of the power supply from the power supply network, the switching unit connects the at least one accumulator module to the load.
  • the uninterruptible power supply transfers electrical energy from the power supply both to the connected load and to the energy storage device, i .e . H . the energy storage is charged. If there is a fault or failure in the power supply, the energy storage device is connected to the load and starts discharging towards the load in order to maintain the electrical power supply. When the power supply returns to its normal state, electrical energy is again supplied to the load and the energy storage device. D. H . With an uninterruptible power supply, the energy store is charged during normal operation of the power supply and discharged in the event of a fault.
  • EP 2 333 930 A2 discloses an uninterruptible power supply for servers with two mutually independent power supply units which are connected in parallel to the server on the output side and each have an associated backup power supply unit.
  • the backup power supply unit includes a rechargeable battery and a boost chopper and is powered directly by mains voltage from a utility grid.
  • the backup power supply unit is connected via a line to an electrical connection between an AC/DC converter and a DC/DC converter of the respectively assigned power supply unit, d. H .
  • the battery is then connected to the server via the boost chopper and the DC/DC converter closed .
  • FIG. 5 discloses an uninterruptible power supply with a number of uninterruptible power supply units which are connected to the servers in parallel with one another.
  • the rechargeable batteries of the uninterruptible power supply units are charged from a network via an AC/DC converter and a DC/DC step-down converter and are each connected to the Surver via a DC/DC boost converter.
  • US 2016/0190865 A1 discloses a UPS system with a UPS, a battery with a plurality of battery units connected in parallel, a controller and a battery charger.
  • the battery charger is not connected to the UPS on the input side, but directly to a grid, which means that the battery units can be charged with higher electrical power than if they are charged via the UPS.
  • a UPS system with a single UPS and a single associated battery with a plurality of battery units connected in parallel to one another is thus disclosed.
  • An arrangement according to the invention comprises at least two uninterruptible power supplies, each of which
  • Each of the uninterruptible power supplies is designed in such a way that, in the presence of a normal voltage at the input, it electrically connects both the input and the output to supply the electrical load with current from the voltage supply, and also electrically connects the input to the energy storage device in order to in a charging operation to load or to keep loaded. In the event of a failure or a fault in the voltage at the input, it connects the energy store electrically to the output in buffer mode in order to supply the electrical load with electricity from the energy store.
  • the outputs of the uninterruptible power supplies are connected in parallel to one another to a common electrical load.
  • the energy stores of the uninterruptible power supplies are electrically connected to one another in buffer mode in a direct parallel circuit.
  • the buffer time i. H . the duration of the buffer operation can be increased in accordance with the sum of the storage capacities of the energy storage devices.
  • the nominal current (or the electrical nominal power) that can be supplied to the load can be increased according to the sum of the nominal currents of the uninterruptible power supplies.
  • a redundancy in the supply of the load is provided by the uninterruptible power supplies, i. H . if one of the uninterruptible power supplies fails, supply is still ensured by at least one further uninterruptible power supply.
  • the energy stores are electrically connected to one another in a direct parallel circuit according to the invention in this operating case and are thus brought to the same voltage potential. This ensures that there is no one-sided overloading of one of the uninterruptible power supplies and that it is switched off.
  • a direct parallel connection is a parallel connection on a direct or understood the shortest electrical paths between connections or poles of the energy storage.
  • the energy stores are brought to the same or almost the same voltage potential and, as a rule, no loads are connected to this electrical connection between the energy stores.
  • an "indirect" parallel connection of the energy storage devices would be, for example, a parallel connection via the common load and possibly other interconnected lossy components (e.g. voltage regulators, decoupling diodes). In the latter case, however, it would not be ensured that the energy storage devices would are located at the same or almost the same voltage potential.
  • the at least two uninterruptible power supplies are preferably of identical design. However, they can also be designed differently.
  • an uninterruptible power supply in charging mode could see the charging voltage of another uninterruptible power supply as the terminal voltage of the energy storage due to the parallel connection of the energy storage and thus stop charging because the energy storage is incorrectly recognized as fully charged.
  • the energy stores are electrically separated from one another during charging.
  • the uninterruptible power supplies each have a signaling contact for controlling both the electrical connection and the electrical isolation of the energy stores.
  • the signaling contacts can then be connected to a relay which is switched into an electrical connection between the energy stores. Both the electrical connection and the electrical isolation of the energy stores can be effected in a simple manner via the relay.
  • the signaling contacts preferably energize the relay in such a way that it closes in buffer mode and thus electrically connects the energy stores of the uninterruptible power supplies to one another, and that it opens in charging mode and thus electrically separates the energy stores of the uninterruptible power supplies from one another.
  • the arrangement can also be designed in such a way that both the electrical connection and the electrical separation of the energy storage devices can be controlled by the voltage at the inputs of the uninterruptible power supplies.
  • a relay can then be connected to the inputs of the uninterruptible power supplies, for example, which relay is switched into an electrical connection between the energy stores. Both the electrical connection and the electrical isolation of the energy stores can then be effected in a simple manner via the relay.
  • the input then preferably energizes the relay in such a way that it closes in buffer operation and thus electrically connects the energy stores of the uninterruptible power supplies to one another, and that it opens in charging operation and thus electrically separates the energy stores of the uninterruptible power supplies from one another.
  • the energy stores are also electrically connected to one another during charging, with one of the uninterruptible power supplies controlling the charging of the energy stores by the respective other(s) uninterruptible power supply(s).
  • the uninterruptible power supplies could communicate with one another in such a way that they implement master-slave operation.
  • One of the uninterruptible power supplies could act as a master and specify an end-of-charge voltage and the other uninterruptible power supply or the other uninterruptible power supplies would then only act as a slave, supplying an additional charging current by remote control.
  • a method according to the invention relates to the operation of an arrangement comprising at least two uninterruptible power supplies, each of which has an input for connection to a voltage supply and an output for connection with an electrical load and at least one energy store.
  • Each of the uninterruptible power supplies electrically connects both the input to the output in the presence of a normal voltage at the input, in order to supply the electrical load with current from the voltage supply, and in a charging mode, the input to the energy store in order to supply the energy store with current from to charge the power supply or to keep loaded.
  • the energy storage device In the event of a failure or a fault in the voltage at the input, it electrically connects the energy storage device to the output in buffer operation in order to supply the electrical load with electricity from the energy storage device.
  • the outputs of the uninterruptible power supplies are connected in parallel to one another to a common electrical load.
  • the energy stores of the uninterruptible power supplies are electrically connected to one another in buffer mode in a direct parallel circuit.
  • the energy stores are electrically separated from one another during charging.
  • the uninterruptible power supplies control both the electrical connection and the electrical disconnection of the energy stores via a respective signaling contact.
  • the signaling contacts can control a relay which is switched into an electrical connection between the energy stores.
  • the relay can then be energized by the signaling contacts in such a way that it closes in the buffer mode and thus electrically connects the energy stores of the uninterruptible power supplies to one another, and that it is in the charging mode opens and thus electrically separates the energy stores of the uninterruptible power supplies from one another.
  • both the electrical connection and the electrical separation of the energy stores can be controlled by the voltage at the inputs of the uninterruptible power supplies.
  • the voltage then advantageously controls a relay which is switched into an electrical connection between the energy stores.
  • the relay is then advantageously energized via the input in such a way that it closes in buffer mode and thus electrically connects the energy stores of the uninterruptible power supplies to one another, and that it opens in charging mode and thus electrically separates the energy stores of the uninterruptible power supplies from one another .
  • the energy storage can also be electrically connected to one another during charging, with one of the uninterruptible power supplies controlling the charging of the energy storage through the respective other (n) uninterruptible power supply(s).
  • FIG. 3 shows the arrangement of FIG. 1, with the energy storage devices also being electrically connected to one another in a direct parallel circuit
  • FIG. 4 shows the arrangement of FIG. 3 with a control of both the electrical connection and the electrical separation of the energy stores by signaling contacts of the uninterruptible power supplies
  • FIG. 5 shows the arrangement of FIG. 3 with a control of both the electrical connection and the electrical separation of the energy stores by the voltages at the inputs of the uninterruptible power supplies, and
  • FIG. 6 shows the arrangement of FIG. 3 with a master-slave operation of the uninterruptible power supply when charging the energy store.
  • the load 20 is, for example, automation components (e.g. controllers, input/output modules, communication components, HMI devices, industrial PCs, sensors, actuators) of a plant in the process industry, the discrete manufacturing industry or building technology.
  • automation components e.g. controllers, input/output modules, communication components, HMI devices, industrial PCs, sensors, actuators
  • the energy or Power is supplied to the load 20 by an arrangement 10 comprising two uninterruptible power supplies 2, each of which has a basic unit 3 with an input 4 with connections 4a, 4b for connection to a voltage supply 5, an output 6 with connections 6a, 6b for connection to the electrical load 20 and at least one energy store 8 include.
  • the uninterruptible power supplies 2 are preferably of identical design. But they can also be designed differently, d. H . that constructive and also functional deviations occur and only the basic functionalities are the same.
  • the voltage supply 5 of the uninterruptible power supplies 2 can be provided directly by an energy supply network 11 .
  • the power supply 5 is zers 9 or by an electronic power supply in the form of a switching network. provided by a switched-mode power supply (sometimes referred to as a switched-mode power supply).
  • a switching power supply 9 is fed from the three-phase power supply network 11, which is designed in particular as a three-phase network, and provides a direct current output voltage U (e.g. 24 volts direct current at a nominal current of 40 A) at its output for supplying a load.
  • Switched-mode power supplies of this type are known, for example, from EP 3 544 166 A1 and EP 3 451 476 A1.
  • each of the uninterruptible power supplies 2 is therefore preceded by such a switched-mode power supply 9, with all switched-mode power supplies 9 being connected on the input side to the three-phase power supply network 11 and being fed from it.
  • the power supply network 11 or. a switching power supply 9 thus provides the voltage U which is present at the input 4 of the uninterruptible power supply 2 .
  • the uninterruptible power supply 2 is designed in such a way that it is operated in a "normal mode" when the voltage U at the input 4 is in a normal range (i.e. in a defined permissible range).
  • the input is 4 is electrically connected to the output 6 in order to supply the electrical load 20 with current from the voltage supply 5.
  • the input 4 is electrically connected to the energy store 8 in order to charge the energy store 8 with current from the voltage supply 5 or .to keep loaded .at a failure or a disturbance of the voltage U, d . H . if the voltage U is outside the defined permissible range, the uninterruptible power supply 2 electrically connects the energy store 8 to the output 6 in buffer operation in order to supply the electrical load 20 with power from the energy store 8 at least for a certain time.
  • the energy storage 8 usually includes one or more battery modules or not shown. batteries .
  • the basic unit 3 can include, for example, a switching unit 31, a charging and/or discharging unit 32 (here a combined charging/discharging unit) and a control unit 33 (see e.g. EP 3 618 219 B1). .
  • the switching unit 31 electrically connects the input 4 to the output 6 .
  • the load 20 connected to the output 6 is thus supplied with power or electrical energy from the switching power supply 9 supplied.
  • the switching unit 31 connects the input 4 to the energy store 8 via the charging/discharging unit 32 . As a result, the energy storage device 8 is charged or kept loaded.
  • the switching unit 31 separates the energy store 8 from the output 6 or from the load 20 connected to it.
  • the charging/discharging unit 32 is used for the targeted charging and discharging of the energy store 8, for example as a function of its temperature and other parameters, and includes a charging controller 32a and a discharging controller 32b.
  • the charge controller 32a is used to regulate the voltage U at the input 4 to a desired value at the terminals 8a, 8b of the energy store 8 (e.g. for targeted charging of the energy store as a function of a charging characteristic).
  • the discharge controller 32b is used for targeted discharging of the energy store 8 and for controlling the output voltage of the energy store 8 to a NEN desired value at the output 6 of the uninterruptible power supply 2.
  • only one loading unit or only one unloading unit can be present.
  • the switching unit 31 usually separates the output 6 from the input 4 or from the switching power supply 9 (but it is also possible that the output 6 and the input 4 remain electrically connected to each other). For this purpose, the switching unit 31 connects the energy store 8 to the output 6 or the load connected to it. The energy store 8 is discharged via the output 6 and, in a buffer operation, supplies a load connected to it with electrical power or electricity via the output 6 . electrical energy .
  • the supply of the load can thus be maintained for a certain time (the so-called "buffer time"), which depends on the amount of electrical energy stored in the energy store 8, even in the event of a fault or failure of the voltage U.
  • buffer time the so-called "buffer time”
  • the disruption or failure of the voltage U is remedied within the buffer time and the power supply to the load could thus be maintained without interruption.
  • the control unit 33 serves to control the charging/discharging unit 32 and the switching unit 31 .
  • the control unit 33 monitors the voltages and currents at the input 4 , at the output 6 and at the energy store 8 for permissible values via sensors (not shown) and provides for a safety sab circuit, for example, when impermissible values are reached.
  • the base unit 3 and the energy store 8 can be installed separately from one another.
  • the base unit 3 is located, for example, in a housing which z. B. is mounted in a control cabinet on a DIN rail.
  • the associated energy Storage tank 8 is placed on the bottom of the control cabinet or in another place because of the lower temperature level.
  • the energy store 8 can also include a monitoring unit 34 that monitors the operating parameters of the energy store 8 (e.g. battery temperature, battery voltage, etc.) and characteristic parameters (e.g. end-of-charge voltage, maximum charging current, temperature dependency of the end-of-charge voltage, end-of-discharge voltage, battery type, battery size, etc .) detects and saves.
  • a monitoring unit 34 that monitors the operating parameters of the energy store 8 (e.g. battery temperature, battery voltage, etc.) and characteristic parameters (e.g. end-of-charge voltage, maximum charging current, temperature dependency of the end-of-charge voltage, end-of-discharge voltage, battery type, battery size, etc .) detects and saves.
  • the uninterruptible power supplies 2 with their upstream switch-mode power supplies 9 are connected parallel to one another to the (common) electrical load 20 via their respective outputs 6 and a downstream diode unit 12 .
  • the rated current that can be fed to the load 20 can be increased according to the sum of the rated currents of the two switched-mode power supplies 9 (here, for example, from 40 A to 80 A).
  • the buffer time i.e. the duration of the buffer operation, can be increased in accordance with the sum of the storage capacities of the energy stores 8.
  • the buffer time can be doubled if the energy stores 8 are identical (i.e. energy stores 8 each with the same storage capacity).
  • redundancy is also provided in the supply of the load 20 by the uninterruptible power supplies 2, i.e. if one of the uninterruptible power supplies 2 fails, supply from the other uninterruptible power supply 2 is still ensured.
  • the energy stores 8 are electrically connected to one another in a direct parallel circuit by means of two bridge arms 15, 16 and thus brought to the same voltage potential in this operating case, as shown in FIG.
  • a bridge arm 15 connects the connections 8a of the energy stores 8 to a positive potential
  • a bridge arm 16 connects the connections 8b of the energy stores 8 to a negative potential.
  • an uninterruptible power supply 2 could then see the charging voltage of the other uninterruptible power supply 2 as the terminal voltage of the energy storage device 8 during charging due to the parallel connection of the energy storage device 8 and thus end the charging process because incorrect as the energy storage 8 are recognized as fully charged.
  • resp. are - as shown in FIG 4 - the energy storage 8 electrically isolated from each other during charging.
  • the uninterruptible power supplies 2 each have a signaling contact 17 for controlling both the electrical connection and the electrical disconnection of the energy stores 8 .
  • the signaling contacts 17 are connected to the control circuit of a relay 18 which is connected to the bridge branch 15 . Both the electrical connection and the electrical isolation of the energy stores 8 can then be effected in a simple manner via the relay 18 .
  • the control circuit of the relay 18 is connected on the one side via the signaling contacts 17 and in each case a line 19 to the connection 4a with positive potential and on the other side to the connection 4b with negative potential.
  • the base unit 3 In charging mode, the base unit 3 connects the signaling contact 17 to the line 19 and consequently to the connection 4a.
  • the signaling contact 17 then energizes the control circuit of the relay 18 in such a way that it opens and thus electrically separates the energy stores 8 from one another.
  • the base unit 3 In the buffer mode, the base unit 3 separates the signaling contact 17 from the line 19 and consequently from the connection 4a.
  • the control circuit of the relay is then no longer energized, so that it closes and thus electrically connects the energy stores 8 to one another.
  • both the electrical connection and the electrical isolation of the energy stores 8 can alternatively be controlled by the voltage U at the inputs 4 of the uninterruptible power supplies 2 .
  • each uninterruptible power supply 2 or their input 4 is a separate bridge branch 15a for this purpose or . 15b, each with a relay 18a or 18b present, which connects the terminals 8a of the energy store 8 to positive potential.
  • the terminals 4a, 4b of each of the uninterruptible power supplies 2 supply the control circuit with one of the relays 18a and 18a respectively. 18b with electric current.
  • the respective inputs 4 or the upstream switching power supplies 9 the control circuits of the respective relays 18a and 18a respectively. 18 in such a way that they open and thus electrically separate the energy stores 8 from one another.
  • the control circuits of the relays 18a and 18a respectively. 18 is not, or at least not sufficiently, energized in such a way that the relays 18a, 18b close and thus electrically connect the energy stores 8 to one another in a parallel circuit.
  • the energy stores 8 are also electrically connected to one another during charging, with one of the uninterruptible power supplies 2 controlling the charging of the energy stores 8 by the other uninterruptible power supply 2 .
  • the uninterruptible power supplies 2 are in communication with one another via a communication connection 40 in such a way that they implement master-slave operation.
  • One of the uninterruptible power supplies 2 then acts as a master and specifies an end-of-charge voltage for the energy store 8 and the other uninterruptible power supply 2 acts as a slave, which remotely supplies an additional charging current based on these specifications.
  • the master can then, for example, also use a temperature sensor for detection the temperature of the energy storage device 8 and for specifying a temperature-dependent end-of-charge voltage.
  • the arrangement 10 can also include more than two uninterruptible power supplies 2 connected in parallel to the load 20 .
  • One or each of the uninterruptible power supplies 2 can also include more than one energy store. The concepts shown in FIG. 3 to 6 for the interconnection of the energy store 8 can then also be used in a corresponding manner for such an arrangement.

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  • Business, Economics & Management (AREA)
  • Emergency Management (AREA)
  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Stand-By Power Supply Arrangements (AREA)

Abstract

Un ensemble (10) selon l'invention comprend au moins deux alimentations sans coupure (2) qui comprennent chacune : - une entrée (4) à connecter à une alimentation en tension (5) ; - une sortie (6) à connecter à une charge électrique (20) ; et - au moins une source d'énergie stockée (8). Chacune des alimentations sans coupure (2) est conçue de telle sorte que, lorsqu'une tension normale (U) est présente au niveau de l'entrée (4), l'alimentation sans coupure connecte électriquement l'entrée (4) à la sortie (6) afin d'alimenter la charge électrique (20) avec de l'énergie provenant de l'alimentation en tension (5) et connecte électriquement l'entrée (4) à la source d'énergie stockée (8) de telle sorte que, dans un mode de charge, la source d'énergie stockée (8) est chargée ou maintenue chargée avec de l'énergie provenant de l'alimentation en tension (5). En cas de défaillance ou de perturbation de la tension (U) au niveau de l'entrée (4), l'alimentation sans coupure connecte électriquement la source d'énergie stockée (8) à la sortie (6), dans un mode tampon, afin d'alimenter la charge électrique (20) avec de l'énergie provenant de la source d'énergie stockée (8). Les sorties (6) des alimentations sans coupure (2) sont connectées, en parallèle entre elles, à une charge électrique commune (20), et dans le mode tampon, les sources d'énergie stockée (8) sont électriquement connectées entre elles dans un circuit parallèle direct. Par conséquent, la durée du mode tampon et donc de la sécurité intégrée de la charge (20) peut être augmentée.
PCT/EP2022/073265 2021-09-30 2022-08-22 Ensemble comprenant au moins deux alimentations sans coupure et son procédé de fonctionnement WO2023052000A1 (fr)

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EP22768676.3A EP4388635A1 (fr) 2021-09-30 2022-08-22 Ensemble comprenant au moins deux alimentations sans coupure et son procédé de fonctionnement

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DE102021210940.3 2021-09-30
DE102021210940.3A DE102021210940A1 (de) 2021-09-30 2021-09-30 Anordnung umfassend zumindest zwei unterbrechungsfreie Stromversorgungen und Verfahren zu deren Betrieb

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EP3618219B1 (fr) 2018-08-29 2021-04-14 Siemens Aktiengesellschaft Procédé de restauration d'un module de batterie sur-déchargé et système d'alimentation ininterruptible correspondant

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