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
  • H02J9/062—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 AC powered loads
• • 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
  • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
  • H02J2300/30—The power source being a fuel cell
• • 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
  • Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
  • Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
  • Y02B90/10—Applications of fuel cells in buildings
• • 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
  • Y02P—CLIMATE CHANGE MITIGATION TECHNOLOGIES IN THE PRODUCTION OR PROCESSING OF GOODS
  • Y02P90/00—Enabling technologies with a potential contribution to greenhouse gas [GHG] emissions mitigation
  • Y02P90/40—Fuel cell technologies in production processes

Definitions

• the present invention relates to an uninterrupted power supply circuit.
• the invention finds a particularly advantageous application in the field of supplying DC equipment from an AC power source.
• a conventional architecture consists in using a low-voltage AC source 10 supplied by the local electrical network, that is to say downstream of a high-voltage / low-voltage transformer. .
• AC / DC converters 21, 22 enable, on the one hand, the DC power supply of the electronic equipment 1, 2, and, on the other hand, the charging of batteries 31, 32 connected to the power bus.
• some ancillary utilities 3 remain supplied with alternating current directly on the local network, while other equipment 4 are supplied with alternating current by means of DC / AC converters, such as the converter. 40 in series with AC / DC converter 22.
• the technical problem to be solved by the object of the present invention is to provide an uninterruptible power supply circuit from an AC power source, which would make it possible to avoid or at least limit the use batteries for powering electrical equipment in case of interruption of the AC power supply, or even in nominal mode.
• said circuit comprises a fuel cell backup system characterized in that the emergency system comprises:
• a fuel cell starting battery connected to said alternating current source on an input terminal of the emergency system, said starter battery and the fuel cell being connected in parallel with an output terminal of the separate system of the input terminal.
• a switch is disposed on said output terminal.
• a switch is arranged between the fuel cell and said output terminal. It will also be seen later that this solution has the advantage of avoiding the use of any battery to power the electronic equipment, the DC power supply being in this case entirely provided by the circuit according to the invention whether in nominal mode or during an interruption of the AC power supply.
• the starter battery is connected to the source (10) of alternating current via an AC / DC AC / DC converter,
• the starter battery and the fuel cell are connected to the output terminal of the fuel cell backup system via respective DC / DC converters (512, 522),
• a filtering capacity is placed at the output of the starter battery and the fuel cell
• the circuit comprises a backup battery located downstream of the output terminal on a supply line of electronic equipment from the source,
• the fuel cell backup system is kept energized by the AC power source
• the starter battery is maintained by the AC power source when said source is running and by the fuel cell when the latter is turned on, especially in case of failure of the source.
• Figure 1 is a diagram of a power plant according to the prior art.
• Fig. 2 is a diagram showing an installation comprising an uninterruptible power supply circuit according to a first embodiment of the invention.
• Figure 3 is a diagram showing an installation comprising an uninterruptible power supply circuit according to a second embodiment of the invention.
• FIG. 2 is shown an installation for supplying electrical equipment, including electronic.
• some electronic equipment 1, 2 must be supplied with power continuous, for example under 48 V for telecommunications equipment.
• these electronic equipments are powered by means of an AC / DC converter 21 whose input terminal 211 is connected to the AC source and whose terminal 212 of output is connected to the power bus of the installation.
• Other equipment 3, 4 are supplied with alternating current respectively by the local electrical network or via a DC / AC converter 40 connected to the output terminal 212 of the AC / DC converter 21.
• the installation of Figure 2 further comprises an uninterrupted power supply circuit 50 which comprises, on the one hand, a battery 51 connected to the source 10 of alternating current on an input terminal 501 of the circuit 50 by the intermediate AC / DC 511 AC / DC converter and secondly a fuel cell 52.
• the battery 51 of the fuel cell backup system 50 is provided in particular for starting the battery 52.
• the battery 51 and the fuel cell 52 are respectively connected to the output terminal 502 of the circuit 50 via DC / DC converters DC / DC 512 and 522.
• a filtering capacitor 504 at 100 Hz is placed at the output of the battery 51 and the fuel cell 52.
• a switch 503 is disposed on the output terminal 502 of the circuit 50 which then operates in "charger" mode.
• FIG. 2 uses only one backup battery 31 for powering the equipment, which represents a significant advantage over the installation of FIG. 1 for which a plurality of batteries was necessary.
• the switch 503 In nominal mode, the switch 503 is open and the various equipment are powered from the AC source. In case of failure of the AC power supply, the switch 503 is closed and the DC power supply of the electronic equipment 1, 2 and AC of the electrical equipment 4 is provided by the circuit or system 50 emergency power supply without interruption.
• the batteries 31 and 51 serve as a buffer at the start of the circuit 50 during the power switchover.
• FIG. 3 represents a second embodiment in which a switch 503 'is arranged between the fuel cell 52 and the output terminal 502 of the uninterrupted supply circuit 50'.
• the supply circuit 50 'of FIG. 3 provides only the supply of the equipment 2, 3, 4 either at rated speed or when the power supply is interrupted. alternating current. It is understood, with all the advantages that this represents, that in this case, no battery is necessary for the emergency power supply of the equipment 2, 3, 4 since these are permanently supplied by the circuit 50 'and that no interruption of power can therefore occur during a break of the AC power supply. In nominal mode, the switch 503 'is open and the circuit 50' uninterruptible power supply is still energized, but without the fuel cell is powered.
• the battery 51 may be of low capacity since it only has to operate for a few seconds of the start of the circuit 50 ', which is still energized and whose conditions "ready state" are maintained by taking a part of the power that passes through the circuit 50 '.
• the switch 506 of the short circuit being closed in nominal mode and open during an interruption.
• the invention thus makes it possible to undersize the circuit backup batteries as well as the starter battery of the battery.
• the invention even possibly to get rid of backup batteries or replace them with capacity.
• the fuel cell 52 is advantageously a proton exchange membrane (PEM) cell fed, on the one hand, with air and, on the other hand, hydrogen stored under high pressure in tanks or bottles or under low pressure in storage containers. hydrides.
• PEM proton exchange membrane

Landscapes

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

Applications Claiming Priority (2)

Publications (1)

Family

ID=35501087

Family Applications (1)

Country Status (6)

Families Citing this family (4)

Family Cites Families (7)

• 2005
  • 2005-05-03 FR FR0551159A patent/FR2885459B1/fr not_active Expired - Fee Related
• 2006
  • 2006-04-19 JP JP2008509479A patent/JP2008541679A/ja active Pending
  • 2006-04-19 CA CA002605800A patent/CA2605800A1/fr not_active Abandoned
  • 2006-04-19 WO PCT/FR2006/050354 patent/WO2006117488A2/fr active Application Filing
  • 2006-04-19 EP EP06743812A patent/EP1880460A2/fr not_active Withdrawn
  • 2006-04-19 US US11/913,249 patent/US20090029194A1/en not_active Abandoned

Non-Patent Citations (1)

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