EP3625866A1 - Unterbrechungsfreie stromversorgung - Google Patents
Unterbrechungsfreie stromversorgungInfo
- Publication number
- EP3625866A1 EP3625866A1 EP18739466.3A EP18739466A EP3625866A1 EP 3625866 A1 EP3625866 A1 EP 3625866A1 EP 18739466 A EP18739466 A EP 18739466A EP 3625866 A1 EP3625866 A1 EP 3625866A1
- Authority
- EP
- European Patent Office
- Prior art keywords
- switch
- energy storage
- voltage
- power supply
- storage system
- 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.)
- Withdrawn
Links
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
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H1/00—Details of emergency protective circuit arrangements
- H02H1/0007—Details of emergency protective circuit arrangements concerning the detecting means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/28—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for meshed systems
-
- 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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/24—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage
- H02H3/253—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection responsive to undervoltage or no-voltage for multiphase applications, e.g. phase interruption
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
Definitions
- Uninterruptible power supply The invention relates to a three-phase
- Such an energy storage system can be used both for a voltage-independent ("voltage-independent” or “line interactive") uninterruptible power supply (UPS) and for voltage stabilization in a medium voltage branch line.
- UPS uninterruptible power supply
- the object of the invention is to provide an efficient uninterruptible power supply for a
- control unit detected by a current measurement or voltage measurement a network fault of the mains supply and then opens the switch.
- bypass switch is arranged parallel to the LC resonant circuit, wherein the bypass switch can be actuated by the drive unit or by the energy storage system.
- bypass switch is closed if the energy storage system is not in operation. It is a development that the bypass switch is a medium voltage switch. It is a development that the resonant frequency of the LC resonant circuit is essentially determined by the frequency of the mains supply. It is a development that the resonant frequency of the LC resonant circuit is 50Hz or 60Hz.
- the quality of the LC resonant circuit is designed so that the settling time of the LC resonant circuit is substantially 1 second or in a range between 1 second and 10 seconds.
- the medium-voltage network is a three-phase network, wherein each of the phases has a voltage of at least 1000 volts, in particular a voltage in a range between lkV and 52kV.
- Inductance and a capacity includes
- the load is operated via an energy storage system.
- the statements concerning the device, in particular the uninterruptible power supply, apply correspondingly to the other categories of claim.
- Computer program product that is directly loadable into a memory of a digital computer, comprising
- Program code parts adapted to perform steps of the method described herein.
- executable instructions e.g., in the form of program code
- program code executable instructions
- the processing unit mentioned here can be used, in particular, as a processor unit and / or an at least partially hardwired or logic circuit arrangement
- Said processing unit can be any kind of
- the above explanations regarding the method apply to the device accordingly.
- the device may be in one component or distributed in several
- Fig.l an overview image of a medium-voltage UPS system
- Busbar also referred to as busbar
- the critical load the critical load and the critical load
- Busbar are connected
- Busbar wherein the critical load and the energy storage system are connected in common to different busbars; 4 shows another arrangement for a medium-voltage multi-load UPS, which are connected to a plurality of simple bus bars (bus bars);
- Medium-voltage UPS with at least one critical load on a double busbar shows an exemplary arrangement for a
- Fig.l shows an overview of a medium-voltage UPS system.
- a main feed 101 is over one
- the node 110 is connected via an interrupt switch 104 to an output 106, to which a critical load (this is not shown in Fig.l) is connectable.
- the main feed 101 can by means of a
- bypass switch 105 (also referred to as a bypass switch) can be connected directly to the output 106.
- the bypass switch 105 is in normal operation (ie without further activation) open (this is also called “NO” for "normally open”) and then allows no direct flow of current from the main feed 101 to the output 106 to.
- An energy storage 109 is connected to the node 110 via a power converter 108 and a coupling transformer 107.
- the power converter 108 converts the
- the energy storage 109, the power converter 108 and the coupling transformer 107 may be referred to as energy storage system 111 or part of an energy storage system.
- the energy storage system 111 may be e.g. on
- the energy storage system 111 may have a control unit 113, which has a control unit 113
- the Control unit 113 may for example have an interface with the power converter 108 and / or an interface with the energy storage 109.
- the control unit 113 may act as a BESS controller (BESS:
- the energy storage system 111 may include a
- Interface 114 to a (not shown in Fig.l) external higher-level control unit eg, a so-called Supervisory Controller
- the energy storage 109 can support the voltage without the breaker switch being opened.
- the voltage at the node 110 is detected and detected by the
- Control unit 113 may be attempted to control this voltage to a nominal value.
- Voltage of, for example, 6kV to 30kV (as a three-phase alternating current).
- the connected to the output 106 critical load is thus protected by the energy storage 109 from deviations from the nominal curve of the voltage of the main feed 101.
- the critical load connected to the output 106 is supplied via the main supply 101 and the inductance 103, wherein the
- Energy storage system 111 for a compensation of the reactive power required by the inductance 103 (or the
- inductive voltage drop can provide.
- the drive unit (not shown in Fig.l) can be detected. As a result, the drive unit can the Open circuit breaker 102 accordingly (eg for a certain period of time). If the breaker switch 102 is open, the electrical connection between the main feeder 101 and the output 106 is interrupted. However, the critical load at the output 106 can now be supplied by the energy storage system 111.
- the energy storage system can be dimensioned such that mains faults or voltage dips over a period of a few milliseconds to several minutes
- Breaker 102 arranged voltage detection provided by which an undervoltage in the
- a main feed 201 (redundant over two lines) is connected to a single bus bar 202a.
- the bus bar 202a is over a
- the Bridging circuit 203 connected to a bus bar 202b.
- the bypass circuit 203 has a switch which is normally open (NO: "normally open”).
- the bus bar 202a is connected in series
- Inductance 210 (throttle) connected to the bus bar 202b.
- a load 204 To the bus bar 202b are a load 204 and a
- the energy storage system 205 may include a variety of
- Energy storage subsystems 211, 212 are electrically connected (or connectable) to the load.
- a drive unit 206 is electrically connected to the
- Power rail 202 a connected and a voltage measurement 207 allows the drive unit 206 to detect whether a Mains fault exists and the main feeder 201 is to be disconnected from the load 204. If so, the driver 206 initiates the interrupt switch 209 (ie, the interrupt switch 209 is opened).
- the voltage measurement 208 is optional for re-syncing and re-closing the
- the voltage measurement 208 may be e.g. omitted if the energy storage system 205 has a voltage measurement at the connection to the busbar 202b. If no current flows through the inductance 210, then this voltage measurement of the
- Energy storage system 205 (substantially) the same measured value as the voltage measurement 208.
- the result of the voltage measurement of the energy storage system can be provided by the control unit 213 of the drive unit 206.
- the bypass circuit 203 is preferably closed when the energy storage system 205 is partially or completely shut down or fails, because in this case, the reactive power compensation of the inductance 210 can no longer be ensured.
- a monitoring system e.g., a SCADA system, i.e., control room
- Bridging circuit 203 to close. It is also possible that the control unit 213 automatically recognizes that the bypass circuit 203 should be closed. In this case, the communication from the control unit 213 via the drive unit 206 to the
- the load 204 is operated via the main feed 201.
- the current flows via the busbar 202a through the series connection of breaker switch 209 and inductance 210 to the Busbar 202b and thus to the load 204 and the
- the interrupt switch 209 is opened accordingly (e.g., for a certain period of time).
- the breaker switch 209 is opened, the electrical connection between the main feeder 201 and the load 204 is interrupted.
- Energy storage system 205 are supplied with electrical energy.
- Variant 2 Single busbar - an alternative
- FIG. 3 shows an alternative to the embodiment shown in FIG. In contrast to FIG. 2, the energy storage system in FIG. 3 is not connected to the busbar 202b but to a busbar 301 which is arranged between the inductance 210 and the busbar 202b.
- Variant 3 Single busbar, several loads
- a main feeder 401 has two redundant lines, one of the lines being connected to a bus bar 402al and the other of the lines being connected to a bus bar 402a2.
- the busbar 402al is connected via a switch 415 to the busbar 402a2, the switch 415 being closed (NC) without further activation (ie in normal mode).
- the bus bar 402al can be connected to a busbar 402b via a bridging circuit 403a.
- Power rail 402a2 is also over a
- Bridging circuit 403b connectable to a busbar 402c.
- the bypass circuits 403a and 403b each have a switch which is normally open (NO).
- the bus bar 402al and the bus bar 402a2 are connected to a bus bar 414a.
- the bus bar 414a is connected via a series circuit comprising a
- Power rail 414b is connected to bus bar 402b and to bus bar 402c.
- a load 404a To the busbar 402b is a load 404a and to the busbar 402c a load 404b is connected.
- An energy storage system 405 is connected to the busbar 414b.
- the energy storage system 405 may include a variety of
- Energy storage subsystems 411, 412 are electrically connected (or connectable) to the load 404a, 404b.
- Control closed (NC) are.
- a drive unit 406 is electrically connected to the
- Busbars 402al and 402a2 connected and a
- Voltage measurement 407 allows the drive unit 406 to detect whether there is a network fault and the
- Main feeder 401 is to be separated from the two loads 404a, 404b. If this is the case, it will trigger
- the drive unit 406 drive the normally closed bypass circuits 403a and 403b.
- the loads 404a and 404b are operated via the main feed 401.
- the current flows via the busbars 402al, 402a2, further via the busbar 414a through the series circuit
- Breaker switch 409 and inductor 410 to bus bar 414b and thus to energy storage system 405. From bus bar 414b, current flows to both bus bar 402b and load 404a and to bus bar 402c and load 404b.
- break switch 409 is opened accordingly (e.g., for a certain period of time).
- break switch 409 is opened, the electrical connection between the main feeder 401 and the loads 404a, 404b
- FIG. 5 shows another exemplary arrangement for a medium voltage UPS.
- a main feeder 501 has two redundant lines, each of the redundant ones
- Power rail 502a2 is connected.
- a bypass circuit 503 is the
- the bypass circuit 503 has several
- the bus bar 502al and the bus bar 502a2 are connected to a bus bar 514a.
- the bus bar 514a is connected via a series circuit comprising a
- Bus bar 514b is connected to bus bar 502bl and to bus bar 502b2. To the bus bar 502bl and to the bus bar 502b2, a load 504 is connected. An energy storage system 505 is connected to the busbar 514b.
- the energy storage system 505 may include a variety of
- Energy storage subsystems 511, 512 are electrically connected (or connectable) to the load 504.
- a drive unit 506 is electrically connected to the
- Voltage measurement 507 allows the drive unit 506 to detect whether there is a network fault and the
- Main feeder 501 is to be disconnected from the load 504. If so, the driver 506 triggers the interrupt switch 509 (i.e.
- Breaker switch 509 is opened.
- Bridging circuit 503 drives (closes). In this way, it can be achieved that the UPS circuit comprising the interrupt switch 509 and the inductance 510 and the energy store 505 is bridged.
- the load is 504 on the
- Main feeder 501 operated. In this case, the current flows via the busbars 502al, 502a2, further over the
- Interrupt switch 509 and inductor 510 to the bus bar 514b and thus to the energy storage system 505. From the bus bar 514b, the current flows via the bus bars 502bl and 502b2 to the load 504.
- the load 504 may be powered by the energy storage system 505 with electrical energy
- Variant 5 Double busbar - an alternative
- FIG. 6 shows another exemplary arrangement for a medium voltage UPS.
- a main feeder 601 has two redundant lines, each of the redundant ones
- Busbar 602a2 is connected.
- bypass circuit 603 By means of a bypass circuit 603 is the
- Busbar 602al with a busbar 602bl and the
- Busbar 602a2 connectable to a busbar 602b2.
- the bypass circuit 603 has several
- the bus bar 602al and the bus bar 602a2 are connected to a bus bar 614a.
- the bus bar 614a is connected via a series circuit
- Bus bar 614b is connected to bus bar 602bl and to bus bar 602b2.
- the energy storage system 605 may include a variety of
- Energy storage subsystems 611, 612 are electrically connected (or connectable) to the load 604.
- Busbar 602bl and connected to the busbar 602b2.
- a drive unit 606 is electrically connected to the
- Busbars 602al and 602a2 connected and a
- Voltage measurement 607 allows the drive unit 606 to detect whether there is a network fault and the
- Main feeder 601 is to be disconnected from the load 604. If so, the drive unit 606 triggers the interrupt switch 609 (i.e.
- Breaker switch 609 is opened.
- Bridging circuit 603 drives (closes). As a result, it can be achieved that the UPS circuit comprising the interrupt switch 609 and the inductor 610
- Main feeder 601 operated. In this case, the current flows via the busbars 602al, 602a2, further over the
- Interrupt switch 609 and inductor 610 to bus bar 614b. From the bus bar 614b, the current flows through the bus bars 602bl and 602b2 to the load 604 and to the energy storage system 605. When a mains fault or voltage dip occurs on the main feeder 601, this may be caused by the
- the interrupt switch 609 is opened accordingly (e.g., for a certain period of time). If the interrupt switch is 609
- the load 604 may be powered from the energy storage system 605 with electrical energy
- the drive unit shown in each case is set up in such a way that an undervoltage of the feed is detected and then the breaker switch is triggered (i.e., opened).
- the undervoltage within a short time, e.g. in a few milliseconds or in a time that is shorter than the duration of a half wave of the
- time can be to detect the undervoltage in a range between 1ms and 2ms.
- a three-phase voltage measurement is performed on the primary side at the breaker switch (compare the voltage measurements 207, 307, 407, 507 and 607 in FIGS
- Figs. 2 to 6 i. the three voltages between each of the two phases are measured.
- monitoring preferably substantially simultaneously
- a disturbance e.g., a deviation in amplitude, phase, and / or harmonics.
- Breaker switch are triggered.
- Interrupt switch is triggered (i.e., opened).
- the cascaded delayed signal cancellation DQ transformation may be performed according to the above
- the calculation can be based on measured values which were determined with a sampling rate of about 200 s. It is also possible that a sampling of the full period is performed with 2 n sampling points. For example, 128 or 256
- Sample points can be determined at 50Hz or 60Hz.
- the measured value acquisition can preferably be in two stages
- a measurement card samples analog raw readings from the sensor at a clock rate that
- Voltage problem e.g. after a predetermined (sufficient) duration triggers the breaker.
- an LC resonance circuit instead of the throttle, an LC resonance circuit can be implemented.
- the LC resonant circuit in this case comprises a series circuit of an inductance and a capacitance.
- a main feed 701 (here redundantly over two lines, for example) is connected to a bus bar 702a.
- the busbar 702a is connectable via a bridging circuit 703 to a busbar 702b.
- Bridging circuit 703 has a
- the busbar 702a and the busbar 702b are also referred to as a single busbar.
- the busbar 702a is connected in series through a medium voltage switch 720 and the LC resonant circuit
- Busbar 702b are a load 704 and a
- Parallel to the LC resonant circuit 721 is an optional
- Bypass switch 722 arranged. This one is in
- the bypass switch 722 may also be omitted.
- the energy storage system 705 may include a variety of
- Energy storage subsystems 711, 712 are electrically connected (or connectable) to the load 704.
- NC closed
- a drive unit 706 is electrically connected to the
- Busbar 702a connected and a voltage measurement 723 allows the drive unit 706 to detect whether the
- Main feeder 701 is to be disconnected from the load 704.
- the drive unit 706 has a
- Communication link with the control unit 713 as well as the drive unit 706 may be the bypass switch
- Bypass circuit 703 drives. This allows the LC resonant circuit and the medium voltage switch 720 to be bypassed for a predetermined period of time.
- the LC resonant circuit 721 can be used in a 50Hz
- the LC resonant circuit 721 may be further configured such that the impedance of its inductance is approximately equal to the impedance of the load 704. The capacity of the LC resonant circuit 721 results, for example, by the vote on the
- the quality of the LC resonant circuit 721 limits or determines the possible current slew rate through the LC resonant circuit 721.
- energy storage system 705 may additionally be used for all "slow" network services, such as
- the medium voltage switch 720 may be designed as a normal (slow) medium voltage switchgear, based on which the main feed 701 after a grid period or after a few network periods from the energy storage system 705 and the load 704 is disconnected.
- the drive unit 706 (e.g., as a result of a corresponding signaling by the
- Control unit 713 close the bypass circuit 703 and thus bridge the LC resonant circuit 721. If the energy storage system 705 is not in operation and the LC resonant circuit 721 is not bridged (ie the
- Control unit 713 and drive unit 706 experience drive unit 706 when energy storage system 705 is operational again and may reopen bypass switch 722. If there is no mains fault, the stationary one takes place
- the energy storage system 705 takes over (positive and negative) load changes and
- Energy storage system 705 relative to the nominal power or in comparison with a conventional UPS with double AC-DC power conversion low.
- the losses of the LC resonant circuit are approximately 0.2% and the losses of the energy storage system 705 are approximately 1.0%.
- a generating unit e.g. a diesel generator, to be connected.
- the medium voltage network is a 60Hz network.
- the solution with LC resonance circuit described here has the advantage that no additional expensive and error-prone power electronics are necessary.
- the LC resonant circuit itself is robust with a comparatively cost-effective filter technology.
- due to the LC resonant circuit to the network side especially in the upstream high-voltage network) hardly harmonics of the loads are passed.
- the proposed here UPS system makes a positive contribution to
- control unit (the energy storage subsystems
- control unit (the energy storage subsystems
- control unit (the energy storage subsystems
- control unit (the energy storage subsystems
- control unit (the energy storage subsystems
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Business, Economics & Management (AREA)
- Emergency Management (AREA)
- Stand-By Power Supply Arrangements (AREA)
Abstract
Description
Claims
Applications Claiming Priority (2)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
DE102017211351.0A DE102017211351A1 (de) | 2017-07-04 | 2017-07-04 | Unterbrechungsfreie Stromversorgung |
PCT/EP2018/066504 WO2019007691A1 (de) | 2017-07-04 | 2018-06-21 | Unterbrechungsfreie stromversorgung |
Publications (1)
Publication Number | Publication Date |
---|---|
EP3625866A1 true EP3625866A1 (de) | 2020-03-25 |
Family
ID=62873302
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
EP18739466.3A Withdrawn EP3625866A1 (de) | 2017-07-04 | 2018-06-21 | Unterbrechungsfreie stromversorgung |
Country Status (4)
Country | Link |
---|---|
US (1) | US11527910B2 (de) |
EP (1) | EP3625866A1 (de) |
DE (1) | DE102017211351A1 (de) |
WO (1) | WO2019007691A1 (de) |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE102017211351A1 (de) | 2017-07-04 | 2019-01-10 | Siemens Aktiengesellschaft | Unterbrechungsfreie Stromversorgung |
US11101658B2 (en) | 2019-01-18 | 2021-08-24 | Non-Synchronous Energy Electronics, Llc | Techniques for electric power distribution and a system implementing the same |
AU2019453332B2 (en) | 2019-07-01 | 2022-10-13 | Nissin Electric Co., Ltd. | Uninterruptible power supply device |
Family Cites Families (19)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
DE409279C (de) | 1923-12-05 | 1925-02-05 | Aeg | Sicherheitseinrichtung fuer Wechselstromanlagen |
JP2947372B2 (ja) * | 1991-04-25 | 1999-09-13 | 株式会社関電工 | 多機能電力変換システム |
DE4422265A1 (de) * | 1994-06-24 | 1996-01-04 | Siemens Ag | Vorrichtung zur Begrenzung eines Kurzschlußstromes in einem Netz |
JP2002320331A (ja) * | 2001-04-18 | 2002-10-31 | Toshiba Corp | 系統連系電力変換システムの制御装置 |
KR20050088107A (ko) * | 2002-12-06 | 2005-09-01 | 일렉트릭 파워 리서치 인스티튜트 | 무정전 전원 공급기 및 발전기 시스템 |
WO2006010725A1 (de) * | 2004-07-26 | 2006-02-02 | Siemens Aktiengesellschaft | Strombegrenzer mit funkenstrecke |
NO326936B1 (no) | 2005-11-11 | 2009-03-16 | Norsk Hydro Produksjon As | Undervann avbruddsikkert stromforsyningssystem |
EP1890371A1 (de) * | 2006-08-03 | 2008-02-20 | Michael J. Mosman | USV-Systemkonfiguration mit parallelen und von einander unabhängigen Modulen |
US7982332B2 (en) * | 2006-12-08 | 2011-07-19 | Chrysler Group Llc | Power device for a vehicle |
US20120019203A1 (en) * | 2010-07-22 | 2012-01-26 | Consolidated Edison Company Of New York, Inc. | Energy storage and vehicle charging system and method of operation |
DE102011089851B4 (de) * | 2011-12-23 | 2013-04-11 | TelecityGroup Germany Gmbh | Vorrichtung zur unterbrechungsfreien Stromversorgung von elektrischen Verbrauchern und Verfahren zum Betrieb der Vorrichtung |
US10958184B2 (en) * | 2014-07-09 | 2021-03-23 | Abb Schweiz Ag | Uninterruptible power supply and method of operation |
US9923371B1 (en) | 2014-08-13 | 2018-03-20 | Rosendin Electric, Inc. | Shared resource system |
US10148122B2 (en) * | 2014-12-17 | 2018-12-04 | Abb Schweiz Ag | Systems and methods for implementing series compensators in static UPS |
US9831717B2 (en) * | 2015-09-16 | 2017-11-28 | General Electric Company | Systems and methods for operating uninterruptible power supplies |
US10931190B2 (en) * | 2015-10-22 | 2021-02-23 | Inertech Ip Llc | Systems and methods for mitigating harmonics in electrical systems by using active and passive filtering techniques |
DE102017211351A1 (de) | 2017-07-04 | 2019-01-10 | Siemens Aktiengesellschaft | Unterbrechungsfreie Stromversorgung |
DE102017211355A1 (de) | 2017-07-04 | 2019-01-10 | Siemens Aktiengesellschaft | Anordnung zum Ausgleich von Spannungseinbrüchen und System mit solch einer Anordnung |
DE102017211356A1 (de) | 2017-07-04 | 2019-01-10 | Siemens Aktiengesellschaft | Anordnung zum Ausgleichen von Spannungseinbrüchen in einem Stomversorgungsnetz und Verfahren zum Ausgleichen von Spannungseinbrüchen in einem Stomversorgungsnetz |
-
2017
- 2017-07-04 DE DE102017211351.0A patent/DE102017211351A1/de not_active Ceased
-
2018
- 2018-06-21 US US16/628,759 patent/US11527910B2/en active Active
- 2018-06-21 EP EP18739466.3A patent/EP3625866A1/de not_active Withdrawn
- 2018-06-21 WO PCT/EP2018/066504 patent/WO2019007691A1/de unknown
Also Published As
Publication number | Publication date |
---|---|
US20200295594A1 (en) | 2020-09-17 |
US11527910B2 (en) | 2022-12-13 |
DE102017211351A1 (de) | 2019-01-10 |
WO2019007691A1 (de) | 2019-01-10 |
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