WO2014184401A1 - Sistema de alimentación ininterrumpida en potencia cc/ca y método de control - Google Patents
Sistema de alimentación ininterrumpida en potencia cc/ca y método de control Download PDFInfo
- Publication number
- WO2014184401A1 WO2014184401A1 PCT/ES2013/070314 ES2013070314W WO2014184401A1 WO 2014184401 A1 WO2014184401 A1 WO 2014184401A1 ES 2013070314 W ES2013070314 W ES 2013070314W WO 2014184401 A1 WO2014184401 A1 WO 2014184401A1
- Authority
- WO
- WIPO (PCT)
- Prior art keywords
- output
- converter
- power source
- critical loads
- selector
- Prior art date
Links
- 238000000034 method Methods 0.000 title claims abstract description 5
- 230000002159 abnormal effect Effects 0.000 claims description 7
- 239000000446 fuel Substances 0.000 claims description 2
- 230000002547 anomalous effect Effects 0.000 abstract description 2
- 230000005611 electricity Effects 0.000 description 3
- 238000012544 monitoring process Methods 0.000 description 3
- 239000003990 capacitor Substances 0.000 description 2
- 238000006243 chemical reaction Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 238000012423 maintenance Methods 0.000 description 2
- 230000000295 complement effect Effects 0.000 description 1
- 238000001816 cooling Methods 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 230000004224 protection Effects 0.000 description 1
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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/381—Dispersed generators
-
- 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
- H02J5/00—Circuit arrangements for transfer of electric power between ac networks and dc networks
-
- 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
- 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
- H02J9/068—Electronic means for switching from one power supply to another power supply, e.g. to avoid parallel connection
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
-
- 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
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
-
- 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
- H02J2300/20—The dispersed energy generation being of renewable origin
-
- 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
- H02J2300/20—The dispersed energy generation being of renewable origin
- H02J2300/22—The renewable source being solar energy
- H02J2300/24—The renewable source being solar energy of photovoltaic origin
-
- 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
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/46—Controlling of the sharing of output between the generators, converters, or transformers
-
- 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
- Y02B10/00—Integration of renewable energy sources in buildings
- Y02B10/70—Hybrid systems, e.g. uninterruptible or back-up power supplies integrating renewable energies
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Definitions
- the present invention has its main field of application in the industry for the design of electronic devices and, more particularly, for those conceived within the sector of electronic power converters for photovoltaic solar energy.
- the object of the invention is to provide a power system for various elements that form the electronic DC / AC power converters (DC - direct current -, AC - alternating current), which guarantees the operation of the converters during normal and normal operating conditions.
- anomalous operating conditions specially designed for photovoltaic systems connected to the electricity grid, characterized by its robustness, simplicity, safety, flexibility, low cost and low maintenance.
- the photovoltaic installations of network connection are formed by a set of photovoltaic modules (photovoltaic generator) and an electronic DC / AC power converter, also called an inverter, which conditions the energy produced by the photovoltaic modules and injects it into the electricity grid.
- photovoltaic modules photovoltaic generator
- an electronic DC / AC power converter also called an inverter
- the inverter converts the direct current (DC) energy generated by the photovoltaic modules to alternating current (AC).
- the inverters are electronic power converters formed by different elements.
- said elements can be: a power stage (where the conversion of direct current to alternating current is performed), a filtering stage, control devices, sensing elements, power supplies, protections, relays for monitoring, relay or contactor for network connection and fans, among others.
- a power stage where the conversion of direct current to alternating current is performed
- a filtering stage control devices, sensing elements, power supplies, protections, relays for monitoring, relay or contactor for network connection and fans, among others.
- To feed the different elements that make up the converter different options are found in the state of the art. One of them consists in feeding the control devices and sensing elements from a DC / DC power source that takes energy from the photovoltaic generator.
- the rest of the elements of greater power such as contactors, relays for monitoring, fans, etc., are fed in alternating current (AC)
- the grid connection regulations of photovoltaic inverters include the need for investors to remain connected to the grid during power failures, guaranteeing continuity of supply and therefore the stability of the system.
- a lack of voltage causes a lack of power to the elements and, in the case that the powered elements are contactors, the opening of the elements. If in particular it is the network connection contactor, the disconnection of the inverter to the network will be caused, not complying with the provisions of the regulations.
- the first is to add to the converter uninterruptible power supplies that guarantee continuity of supply.
- these systems incorporate batteries that make the system and its maintenance more expensive, while being not very robust.
- the second consists of incorporating capacitor banks, storing energy that will be subsequently used to power the different elements during the course of the network failure.
- This system must be designed taking into account the maximum time of lack of tension. In the current regulations, according to the different requirements of the countries, these times vary so that the design of a universal solution is difficult. In addition, in this solution the relationship between energy and volume occupied is low, so it is necessary to allocate a large space for the capacitor banks inside the converter.
- - Critical load one in which its power supply cannot be stopped for the correct functioning of the equipment, either DC or AC, such as controls, sensors and mains connection elements such as contactors.
- Non-critical load one in which your energy supply may cease.
- An example of this would be the cooling fans, where the increase in the temperature of the system is not altered during a lack of network. Description of the invention
- the proposed invention consists of a power system for electronic power converters capable of providing continuous and alternating voltages at its output.
- the system takes energy from a DC power source, for example, a Photovoltaic generator and an AC power source, for example, the power grid.
- the proposed invention has different outputs that can be DC and AC, which allows assigning critical or non-critical loads to each of them.
- the system consists of a DC power source to which two converters, a DC / DC converter and a first DC / AC converter are connected.
- the DC / DC converter can have several levels of output voltage, for example, +5 V, -5 V, +12 V.
- the AC outputs can be single-phase and / or three-phase.
- the system has at least one output for DC loads that is connected to the output of the DC / DC converter.
- the system has at least two AC outputs:
- At least one AC output for critical loads that can be connected to the first DC / AC converter or to the AC power source.
- At least one AC output for non-critical loads that is connected to the AC power source.
- the system has at least one control unit that selects the power source used for the AC output for critical loads based on the availability of the power sources at the system inputs. In an operating state, the AC output for critical loads is fed from the AC power source. In another operating state, the AC output for critical loads is fed from the DC power source through the first DC / AC converter.
- a first selector is the one that feeds the AC output for critical loads from the AC power source or from the DC power source through the first DC / AC converter. The first selector is selected among mechanical devices, switches, diodes, etc.
- the AC output for non-critical loads is fed from the AC power source.
- the control unit is integrated in the first DC / AC converter and controls the operation of the first selector to select where the AC output is fed for critical loads based on the availability of the power source DC and AC power source. If, for example, the DC power source is a photovoltaic generator, at night it does not supply power and the AC output for critical loads is fed directly from the AC power source (for example, the AC network). While when the photovoltaic generator is capable of supplying power to the AC output for critical loads, it changes the position of the first selector to feed said output through the first DC / AC converter.
- the behavior of the system is independent of fluctuations in the electricity grid, for example, voltage gaps.
- a first AC / DC converter is also included that is connected between the AC output for critical loads and the output for DC loads, providing power at the output for DC loads from the AC output for loads critics.
- a third preferred embodiment similar to the first, instead of a single output for DC loads, at least one DC output for non-critical loads and at least one DC output for critical loads are included. Also included is a second AC / DC converter that connects between the AC power source and the DC output for non-critical loads, and can also provide power to the DC output for critical loads from the AC power source according to the control exercised by the control unit. For this, a second selector is available that allows the DC output to be fed for critical loads from the DC / DC converter or from the second AC / DC converter. The second selector is selected among mechanical devices, switches, diodes, etc.
- a fourth preferred embodiment similar to the third further comprises a second additional DC / AC converter whose DC side is connected to the output of the DC / DC converter and whose AC side is connected to the AC output for critical loads.
- Figure 1 It shows a simplified scheme of the system of the proposed invention according to a first preferred embodiment of the invention.
- Figure 2 Shows a simplified scheme of the system of the proposed invention according to a second preferred embodiment of the invention.
- Figure 3 It shows a simplified scheme of the system of the proposed invention according to a third preferred embodiment of the invention.
- Figure 4 Shows a simplified scheme of the system of the proposed invention according to a fourth preferred embodiment of the invention.
- FIG. 1 represents a preferred embodiment of the proposed invention system.
- One input to the system is a DC power source (1), which can be for example a photovoltaic panel, and the other input to the system is an AC power source (2), which can be for example the power grid.
- the DC power source (1) is connected to the input of a DC / DC converter (3).
- the output for DC loads (6) of said DC / DC converter (3) has the capacity to connect to DC loads (critical and / or non-critical), it is the output for DC loads (6).
- the system has two AC load outputs, one AC output for critical loads (7) and another AC output for non-critical loads (8).
- AC output for critical loads (7) it can be connected to a first DC / AC converter (4) or to the AC power source (2) according to the position of a first selector (5), the first DC / AC converter being
- a control unit (9) manages the operation of the first selector (5) to select the power source (1, 2) used in the AC output for critical loads (7).
- the operation of this system would be as follows: in normal operation the control unit (9) keeps the first selector (5) in a first position corresponding to the power supply the AC output for critical loads (7) from said DC power source (1) through the first DC / AC converter (4), while in abnormal operation the control unit (9) drives the first selector
- Normal operation is defined when the DC power source (1) is available, and the first DC / AC converter (4) operates.
- Abnormal operation is defined when at least one of the conditions that define normal operation is not met.
- FIG. 2 shows a preferred embodiment of the invention in which the system of fig. 1 a first AC / DC converter (10) connected between the AC output for critical loads (7) and the output for DC loads (6) is added.
- the control unit (9) keeps the first selector (5) in a first position where the AC output for critical loads (7) is fed through the first DC converter / CA (4).
- the output for DC loads (6) is fed both through the DC / DC converter (3) and through the first AC / DC converter (10).
- the first selector (5) switches to a second position where the AC output for critical loads (7) is fed directly from the AC power source (2), and the output for DC loads (6) is fed both through the DC / DC converter (3) and through the first AC / DC converter (10).
- One of the advantages obtained with the preferred embodiment of fig. 2 is that in case the DC power source (1) is not available, the output for DC loads (6) is fed from the AC power source (2) through the first AC / DC converter (10).
- the system comprises a second AC / DC converter (12) that connects to the AC power source (2).
- the output of said second AC / DC converter (12) is connected to the DC output for non-critical loads (14) and, depending on the position of a second selector (13), also to the DC output for critical loads (1 one ).
- the DC output for critical loads (1 1) can be connected either to the second AC / DC converter (12) or to the DC / DC converter
- the control unit (9) will be responsible for managing the operation of the second selector (13) for the connection of the DC output for critical loads (1 1) to the second AC / DC converter (12) or to the DC / DC converter (3).
- the operation of the system can be similar to that described in relation to fig. one .
- the control unit (9) instructs the first selector and the second selector (5, 13) to adopt a first position corresponding to the supply of the DC output for critical loads (1 1) and the AC output for critical loads (7) from the DC power source (1).
- the first selector (5) is in a first position corresponding to the connection of the DC power source (1) with the AC output for critical loads (7) through the first DC / AC converter (4) and the Second selector (13) is in a first position corresponding to the connection of the DC power source (1) with the DC output for critical loads (1 1) through the DC / DC converter (3).
- the control unit (9) instructs the first selector (5) and the second selector (13) to adopt a second position corresponding to the power supply. the DC output for critical loads (1 1) and the AC output for critical loads (7) from said AC power source (2).
- the first selector (5) goes to a second position corresponding to the direct connection of the AC power source (2) with the AC output for critical loads (7) and the second selector (13) passes to a second position corresponding to the connection of the AC power source (2) with the DC output for critical loads (1 1) through the second AC / DC converter (12).
- normal operation is defined when the DC power source (1) is available, and the first DC / AC converter (4) and the DC / DC converter (3) work.
- Abnormal operation is defined when at least one of the conditions that define normal operation is not met.
- the system depicted in fig. 4 is similar to that described in fig. 3 but also comprises a second DC / AC converter (15) connected between the output of the DC / DC converter (3) and the AC output for critical loads (7).
- the system of fig. 4 includes a second AC / DC converter (12) that connects between the AC power source (2) and the DC output for non-critical loads (14).
- the DC output for critical loads (1 1) can be connected either to the DC output of the second AC / DC converter (12) or to the DC output of the DC / DC converter (3).
- a control unit (9) manages the operation of the second selector (13) so that the DC output for critical loads (1 1) can be fed from said second AC / DC converter (12) or from the DC / DC converter ( 3).
- control unit is integrated in the first DC / AC converter (4), in the second DC / AC converter (15), in the DC / DC converter (3 ), or in the second AC / DC converter (12).
- the system of fig. 4 provides redundancy.
- the DC power source (1) is a photovoltaic generator or an energy storage system, such as batteries, ultracapacities or fuel cells, among others.
Abstract
Description
Claims
Priority Applications (6)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
EP13756914.1A EP2999078B1 (en) | 2013-05-17 | 2013-05-17 | Dc and ac uninterruptible power supply system and control method thereof |
PCT/ES2013/070314 WO2014184401A1 (es) | 2013-05-17 | 2013-05-17 | Sistema de alimentación ininterrumpida en potencia cc/ca y método de control |
US14/891,503 US10256634B2 (en) | 2013-05-17 | 2013-05-17 | Power supply system and method for electronic converters |
BR112015028865-0A BR112015028865B1 (pt) | 2013-05-17 | 2013-05-17 | Sistema de alimentação para conversores eletrônicos e método para acionar o sistema |
AU2013389670A AU2013389670B2 (en) | 2013-05-17 | 2013-05-17 | DC and AC uninterruptible power supply system and control method thereof |
ZA2015/08495A ZA201508495B (en) | 2013-05-17 | 2015-11-17 | Dc and ac uninterruptible power supply system and control method thereof |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
PCT/ES2013/070314 WO2014184401A1 (es) | 2013-05-17 | 2013-05-17 | Sistema de alimentación ininterrumpida en potencia cc/ca y método de control |
Publications (1)
Publication Number | Publication Date |
---|---|
WO2014184401A1 true WO2014184401A1 (es) | 2014-11-20 |
Family
ID=49115537
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
PCT/ES2013/070314 WO2014184401A1 (es) | 2013-05-17 | 2013-05-17 | Sistema de alimentación ininterrumpida en potencia cc/ca y método de control |
Country Status (6)
Country | Link |
---|---|
US (1) | US10256634B2 (es) |
EP (1) | EP2999078B1 (es) |
AU (1) | AU2013389670B2 (es) |
BR (1) | BR112015028865B1 (es) |
WO (1) | WO2014184401A1 (es) |
ZA (1) | ZA201508495B (es) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111433075A (zh) * | 2019-09-05 | 2020-07-17 | 香港应用科技研究院有限公司 | 智能电源中枢 |
Families Citing this family (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US10547191B2 (en) * | 2016-06-15 | 2020-01-28 | Schneider Electric It Corporation | Power management unit for intelligent traffic system applications |
US11342833B2 (en) * | 2017-10-25 | 2022-05-24 | Hubbell Incorporated | Switch for a lighting system |
US11407322B2 (en) * | 2019-09-05 | 2022-08-09 | Hong Kong Applied Science and Technology Research Institute Company, Limited | Smart power hub |
Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060238031A1 (en) * | 2005-04-26 | 2006-10-26 | Wilfred Frey | DC and AC uninterruptible power supply |
US7629708B1 (en) * | 2007-10-19 | 2009-12-08 | Sprint Communications Company L.P. | Redundant power system having a photovoltaic array |
WO2010063326A1 (en) * | 2008-12-05 | 2010-06-10 | Areva T&D Uk Ltd | Electricity substation standby power supply system |
US20120267957A1 (en) * | 2011-04-20 | 2012-10-25 | Czarnecki Neil A | Transfer Switch For Automatically Switching Between Alternative Energy Source And Utility Grid |
Family Cites Families (5)
Publication number | Priority date | Publication date | Assignee | Title |
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US20060158037A1 (en) * | 2005-01-18 | 2006-07-20 | Danley Douglas R | Fully integrated power storage and supply appliance with power uploading capability |
US7616432B2 (en) * | 2008-03-06 | 2009-11-10 | Eaton Corporation | Electrical distribution panel for a number of critical and non-critical loads |
CN103155334A (zh) * | 2010-09-10 | 2013-06-12 | 三星Sdi株式会社 | 能量存储系统及其控制方法 |
WO2012162570A1 (en) * | 2011-05-24 | 2012-11-29 | Cameron D Kevin | System and method for integrating and managing demand/response between alternative energy sources, grid power, and loads |
JP5296161B2 (ja) * | 2011-07-29 | 2013-09-25 | 大和ハウス工業株式会社 | 電力供給システム |
-
2013
- 2013-05-17 WO PCT/ES2013/070314 patent/WO2014184401A1/es active Application Filing
- 2013-05-17 AU AU2013389670A patent/AU2013389670B2/en active Active
- 2013-05-17 EP EP13756914.1A patent/EP2999078B1/en active Active
- 2013-05-17 US US14/891,503 patent/US10256634B2/en active Active
- 2013-05-17 BR BR112015028865-0A patent/BR112015028865B1/pt active IP Right Grant
-
2015
- 2015-11-17 ZA ZA2015/08495A patent/ZA201508495B/en unknown
Patent Citations (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US20060238031A1 (en) * | 2005-04-26 | 2006-10-26 | Wilfred Frey | DC and AC uninterruptible power supply |
US7629708B1 (en) * | 2007-10-19 | 2009-12-08 | Sprint Communications Company L.P. | Redundant power system having a photovoltaic array |
WO2010063326A1 (en) * | 2008-12-05 | 2010-06-10 | Areva T&D Uk Ltd | Electricity substation standby power supply system |
US20120267957A1 (en) * | 2011-04-20 | 2012-10-25 | Czarnecki Neil A | Transfer Switch For Automatically Switching Between Alternative Energy Source And Utility Grid |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN111433075A (zh) * | 2019-09-05 | 2020-07-17 | 香港应用科技研究院有限公司 | 智能电源中枢 |
Also Published As
Publication number | Publication date |
---|---|
BR112015028865A2 (pt) | 2017-07-25 |
EP2999078B1 (en) | 2023-12-20 |
ZA201508495B (en) | 2017-02-22 |
BR112015028865B1 (pt) | 2021-06-29 |
BR112015028865A8 (pt) | 2019-12-31 |
US20160118797A1 (en) | 2016-04-28 |
US10256634B2 (en) | 2019-04-09 |
AU2013389670A1 (en) | 2015-12-03 |
EP2999078A1 (en) | 2016-03-23 |
AU2013389670B2 (en) | 2017-08-31 |
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