US20180181154A1 - Fuel cell power plant with real and reactive power modes - Google Patents
Fuel cell power plant with real and reactive power modes Download PDFInfo
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- US20180181154A1 US20180181154A1 US15/832,860 US201715832860A US2018181154A1 US 20180181154 A1 US20180181154 A1 US 20180181154A1 US 201715832860 A US201715832860 A US 201715832860A US 2018181154 A1 US2018181154 A1 US 2018181154A1
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- Prior art keywords
- fuel cell
- power plant
- mode
- inverters
- cell power
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/70—Regulating power factor; Regulating reactive current or power
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- 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
- H02J3/18—Arrangements for adjusting, eliminating or compensating reactive power in networks
- H02J3/1821—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators
- H02J3/1835—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control
- H02J3/1842—Arrangements for adjusting, eliminating or compensating reactive power in networks using shunt compensators with stepless control wherein at least one reactive element is actively controlled by a bridge converter, e.g. active filters
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M16/00—Structural combinations of different types of electrochemical generators
- H01M16/003—Structural combinations of different types of electrochemical generators of fuel cells with other electrochemical devices, e.g. capacitors, electrolysers
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M8/00—Fuel cells; Manufacture thereof
- H01M8/04—Auxiliary arrangements, e.g. for control of pressure or for circulation of fluids
- H01M8/04298—Processes for controlling fuel cells or fuel cell systems
- H01M8/04694—Processes for controlling fuel cells or fuel cell systems characterised by variables to be controlled
- H01M8/04858—Electric variables
- H01M8/04925—Power, energy, capacity or load
- H01M8/0494—Power, energy, capacity or load of fuel cell stacks
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- 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
- H02J1/00—Circuit arrangements for dc mains or dc distribution 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
- 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
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- 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
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- 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
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
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- 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
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01M—PROCESSES OR MEANS, e.g. BATTERIES, FOR THE DIRECT CONVERSION OF CHEMICAL ENERGY INTO ELECTRICAL ENERGY
- H01M2250/00—Fuel cells for particular applications; Specific features of fuel cell system
- H01M2250/10—Fuel cells in stationary systems, e.g. emergency power source in plant
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- 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
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- 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
-
- Y02B90/14—
-
- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/30—Hydrogen technology
- Y02E60/50—Fuel cells
Definitions
- This disclosure generally relates to fuel cell power plants. More particularly, this disclosure relates to a fuel cell power plant having real and reactive power modes.
- Fuel cells are devices that generate electrical power based on an electrochemical reaction.
- Fuel cell power plants are known that include a cell stack assembly having a plurality of fuel cells for generating a desired amount of power.
- Typical fuel cell power plants generate real power based on the output of the cell stack assembly. It is known, for example, to utilize a set of inverters for providing AC power output based on DC power generated by the cell stack assembly.
- Illustrative example embodiments of this invention include a fuel cell power plant that has the capability of operating in a real power mode and a reactive power mode in which the only power output from the power plant is reactive power.
- An illustrative example fuel cell power plant includes a cell stack assembly having a plurality of fuel cells configured to generate electricity based on an electrochemical reaction.
- the power plant includes a capacitor, a plurality of inverters, and at least one controller that is configured to control the plurality of inverters in a first mode and a second mode.
- the first mode includes the cell stack assembly associated with at least one of the inverters.
- the cell stack assembly and the associated inverter provide real power to a load external to the fuel cell power plant in the first mode.
- the second mode includes at least a second one of the inverters associated with the capacitor to selectively provide reactive power to or receive reactive power from a grid external to the fuel cell power plant.
- An illustrative example method of operating a fuel cell power plant includes controlling a plurality of inverters in a first mode and a second mode.
- a cell stack assembly and at least one associated inverter is used for providing real power to a load external to the fuel cell power plant in the first mode.
- a capacitor and at least a second one of the inverters is used for selectively providing reactive power to or receiving reactive power from a grid external to the fuel cell power plant in the second mode.
- FIG. 1 schematically illustrated selected portions of a fuel cell power plant designed according to an embodiment of this invention operating in a first mode.
- FIG. 2 schematically illustrates the fuel cell power plant of FIG. 1 operating in a second mode.
- Embodiments of this invention provide a fuel cell power plant with the ability to generate reactive power as the only output to support a local grid system, for example.
- FIG. 1 schematically illustrates selected portions of a fuel cell power plant 20 .
- a cell stack assembly (CSA) 22 includes a plurality of fuel cells (not specifically illustrated) that generate electrical power based on an electrochemical reaction.
- the fuel cells may take a variety of forms. For example, some fuel cells will be phosphoric acid fuel cells while others will be polymer electrolyte membrane fuel cells. Those skilled in the art who have the benefit of this description will be able to select an appropriate type of fuel cell and CSA arrangement to meet their particular needs.
- the fuel cell power plant 20 is a low voltage system because it provides a real power output that is less than 600 kilowatts.
- Example implementations include a real power output of 480 kilowatts or 440 kilowatts.
- a plurality of inverters 24 are included for converting DC electrical power from the CSA 22 into real AC power to be provided to a load external to the fuel cell power plant 20 .
- the illustrated example includes at least one switch 26 for selectively coupling a selected number of the inverters 24 with the CSA 22 over a DC bus 28 .
- a controller 30 controls operation of the switch 26 and the inverters 24 to achieve a desired operation and output from the fuel cell power plant 20 .
- the controller 30 also controls a switch 32 that selectively couples an AC bus 34 associated with the inverters 24 to an output 36 of the fuel cell power plant 20 .
- the fuel cell power plant 20 also includes a capacitor 38 and a plurality of loads associated with the operation of the fuel cell power plant schematically shown at 40 .
- Example loads included in the schematic representation at 40 include pumps for circulating coolant or reactants and blowers associated with the fuel cell power plant 20 .
- the controller 30 controls operation of the inverters 24 according to a first mode of operation.
- the first mode corresponds to a real power mode of the fuel cell power plant 20 .
- the controller 30 operates the switches 26 and 32 to selectively couple the cell stack assembly 22 with one or more of the inverters 24 to provide real AC power output at 36 .
- the controller 30 in this example is programmed to control the inverters using known techniques for providing such power on the output 36 . Limited reactive power may be provided in the first mode.
- the capacitor 38 is not involved in providing real AC power output at 36 .
- the controller 30 controls the switch 26 to provide load step transition assistance using power from the capacitor 38 .
- the capacitor 38 provides transient load support.
- FIG. 2 schematically illustrates the fuel cell power plant 20 operating in a second mode in which the output at 36 is exclusively reactive power.
- the controller 30 controls the switches 26 and 32 and the inverters 24 so that at least one of the inverters 24 and the capacitor 38 provide the reactive power output at 36 .
- the CSA 22 is not used for providing any electrical output external to the fuel cell power plant 20 in the second mode.
- output from the CSA 22 provides power to the loads internal to the fuel cell power plant at 40 during the second mode of operation.
- the other six inverters 24 are utilized in association with the capacitor 38 for providing reactive power to or absorbing reactive power from a grid external to the fuel cell power plant 20 .
- the controller 30 controls operation of the inverters 24 associated with the capacitor 38 in the second mode to provide reactive power output to or to absorb reactive power from a grid external to the fuel cell power plant 20 . Under both conditions, the capacitor 38 voltage is controlled by changing the phase angle of the inverters.
- the portion of the DC bus 28 associated with the CSA 22 is isolated from the portion of the DC bus 28 associated with the capacitor 38 .
- the controller 30 operates the switch 26 to realize the DC bus isolation.
- the AC bus 34 is similarly divided into a portion that is operative for providing grid output at 36 and another portion for providing power to the loads at 40 .
- the controller 30 operates the switch 32 to realize such a division of the AC bus 34 to isolate the AC output based on the CSA 22 from the reactive power output based on the capacitor 38 .
- the inclusion of the capacitor 38 and the control of the inverters 24 and switches 26 and 32 allows for the fuel cell power plant 20 to operate in a first, real power mode and in a second, “reactive power only” mode where the output at 36 from the fuel cell power plant 20 is exclusively reactive power.
Abstract
An illustrative example fuel cell power plant includes a cell stack assembly having a plurality of fuel cells configured to generate electricity based on an electrochemical reaction. The power plant includes a capacitor, a plurality of inverters, and at least one controller that is configured to control the plurality of inverters in a first mode and a second mode. The first mode includes the cell stack assembly associated with at least one of the inverters. A cell stack assembly and the associated inverter provide real power to a load external to the fuel cell power plant in the first mode. The second mode includes at least a second one of the inverters associated with the capacitor. The capacitor and the second one of the inverters selectively provide reactive power to or receive reactive power from a grid external to the fuel cell power plant in the second mode.
Description
- This application is a continuation of U.S. patent application Ser. No. 15/060,944, which was filed on Mar. 4, 2016.
- This disclosure generally relates to fuel cell power plants. More particularly, this disclosure relates to a fuel cell power plant having real and reactive power modes.
- Fuel cells are devices that generate electrical power based on an electrochemical reaction. Fuel cell power plants are known that include a cell stack assembly having a plurality of fuel cells for generating a desired amount of power.
- Typical fuel cell power plants generate real power based on the output of the cell stack assembly. It is known, for example, to utilize a set of inverters for providing AC power output based on DC power generated by the cell stack assembly.
- To the extent that known fuel cell power plants have reactive power only capabilities, those are typically limited to operating as a static VAR compensator.
- Illustrative example embodiments of this invention include a fuel cell power plant that has the capability of operating in a real power mode and a reactive power mode in which the only power output from the power plant is reactive power.
- An illustrative example fuel cell power plant includes a cell stack assembly having a plurality of fuel cells configured to generate electricity based on an electrochemical reaction. The power plant includes a capacitor, a plurality of inverters, and at least one controller that is configured to control the plurality of inverters in a first mode and a second mode. The first mode includes the cell stack assembly associated with at least one of the inverters. The cell stack assembly and the associated inverter provide real power to a load external to the fuel cell power plant in the first mode. The second mode includes at least a second one of the inverters associated with the capacitor to selectively provide reactive power to or receive reactive power from a grid external to the fuel cell power plant.
- An illustrative example method of operating a fuel cell power plant includes controlling a plurality of inverters in a first mode and a second mode. A cell stack assembly and at least one associated inverter is used for providing real power to a load external to the fuel cell power plant in the first mode. A capacitor and at least a second one of the inverters is used for selectively providing reactive power to or receiving reactive power from a grid external to the fuel cell power plant in the second mode.
- Various features and advantages of at least one disclosed example embodiment will become apparent to those skilled in the art from the following detailed description. The drawings that accompany the detailed description can be briefly described as follows.
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FIG. 1 schematically illustrated selected portions of a fuel cell power plant designed according to an embodiment of this invention operating in a first mode. -
FIG. 2 schematically illustrates the fuel cell power plant ofFIG. 1 operating in a second mode. - Embodiments of this invention provide a fuel cell power plant with the ability to generate reactive power as the only output to support a local grid system, for example.
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FIG. 1 schematically illustrates selected portions of a fuelcell power plant 20. A cell stack assembly (CSA) 22 includes a plurality of fuel cells (not specifically illustrated) that generate electrical power based on an electrochemical reaction. The fuel cells may take a variety of forms. For example, some fuel cells will be phosphoric acid fuel cells while others will be polymer electrolyte membrane fuel cells. Those skilled in the art who have the benefit of this description will be able to select an appropriate type of fuel cell and CSA arrangement to meet their particular needs. - In one example implementation, the fuel
cell power plant 20 is a low voltage system because it provides a real power output that is less than 600 kilowatts. Example implementations include a real power output of 480 kilowatts or 440 kilowatts. - A plurality of
inverters 24 are included for converting DC electrical power from theCSA 22 into real AC power to be provided to a load external to the fuelcell power plant 20. The illustrated example includes at least oneswitch 26 for selectively coupling a selected number of theinverters 24 with theCSA 22 over aDC bus 28. Acontroller 30 controls operation of theswitch 26 and theinverters 24 to achieve a desired operation and output from the fuelcell power plant 20. Thecontroller 30 also controls aswitch 32 that selectively couples anAC bus 34 associated with theinverters 24 to anoutput 36 of the fuelcell power plant 20. - The fuel
cell power plant 20 also includes a capacitor 38 and a plurality of loads associated with the operation of the fuel cell power plant schematically shown at 40. Example loads included in the schematic representation at 40 include pumps for circulating coolant or reactants and blowers associated with the fuelcell power plant 20. - In
FIG. 1 , thecontroller 30 controls operation of theinverters 24 according to a first mode of operation. In this example, the first mode corresponds to a real power mode of the fuelcell power plant 20. When it is desired to provide real AC power at theoutput 36, thecontroller 30 operates theswitches cell stack assembly 22 with one or more of theinverters 24 to provide real AC power output at 36. Thecontroller 30 in this example is programmed to control the inverters using known techniques for providing such power on theoutput 36. Limited reactive power may be provided in the first mode. - As schematically represented by the dashed lines in
FIG. 1 , the capacitor 38 is not involved in providing real AC power output at 36. There are times, however, during the first mode of operation when a transient load is experienced by the fuelcell power plant 20. This may occur, for example, when there is a relatively sudden increase in the power demand associated with the load external to the fuelcell power plant 20 or when there is a drop in available power from an external grid associated with thepower plant 20. Under such conditions, thecontroller 30 controls theswitch 26 to provide load step transition assistance using power from the capacitor 38. During the first mode of operation the capacitor 38 provides transient load support. -
FIG. 2 schematically illustrates the fuelcell power plant 20 operating in a second mode in which the output at 36 is exclusively reactive power. In the second mode, thecontroller 30 controls theswitches inverters 24 so that at least one of theinverters 24 and the capacitor 38 provide the reactive power output at 36. The CSA 22 is not used for providing any electrical output external to the fuelcell power plant 20 in the second mode. As schematically represented by the dashed lines inFIG. 2 , output from theCSA 22 provides power to the loads internal to the fuel cell power plant at 40 during the second mode of operation. In one example, there are seveninverters 24 with a first one of them used in the second mode for providing power from theCSA 22 to the loads at 40. The other sixinverters 24 are utilized in association with the capacitor 38 for providing reactive power to or absorbing reactive power from a grid external to the fuelcell power plant 20. - The
controller 30 controls operation of theinverters 24 associated with the capacitor 38 in the second mode to provide reactive power output to or to absorb reactive power from a grid external to the fuelcell power plant 20. Under both conditions, the capacitor 38 voltage is controlled by changing the phase angle of the inverters. - In the second mode, the portion of the
DC bus 28 associated with the CSA 22 is isolated from the portion of theDC bus 28 associated with the capacitor 38. Thecontroller 30 operates theswitch 26 to realize the DC bus isolation. TheAC bus 34 is similarly divided into a portion that is operative for providing grid output at 36 and another portion for providing power to the loads at 40. Thecontroller 30 operates theswitch 32 to realize such a division of theAC bus 34 to isolate the AC output based on theCSA 22 from the reactive power output based on the capacitor 38. - The inclusion of the capacitor 38 and the control of the
inverters 24 andswitches cell power plant 20 to operate in a first, real power mode and in a second, “reactive power only” mode where the output at 36 from the fuelcell power plant 20 is exclusively reactive power. - The preceding description is exemplary rather than limiting in nature. Variations and modifications to the disclosed examples may become apparent to those skilled in the art that do not necessarily depart from the essence of this invention. The scope of legal protection given to this invention can only be determined by studying the following claims.
Claims (18)
1. A fuel cell power plant, comprising:
a cell stack assembly including a plurality of fuel cells configured to generate electricity based on an electrochemical reaction;
a capacitor;
a plurality of inverters; and
at least one controller that is configured to control the plurality of inverters in a first mode and a second mode,
the first mode including the cell stack assembly associated with at least one of the inverters, the cell stack assembly and the at least one of the inverters providing real power to a load external to the fuel cell power plant,
the second mode including at least a second one of the inverters associated with the capacitor, the second one of the inverters and the capacitor selectively providing reactive power to or receiving reactive power from a grid external to the fuel cell power plant.
2. The fuel cell power plant of claim 1 , wherein the reactive power of the second mode is the only power output from the fuel cell power plant of the second mode that is external to the fuel cell power plant.
3. The fuel cell power plant of claim 1 , wherein more than one of the inverters is associated with the capacitor in the second mode.
4. The fuel cell power plant of claim 1 , wherein the capacitor is charged by the reactive power received from the grid in the second mode.
5. The fuel cell power plant of claim 1 , wherein
the first mode includes the capacitor associated with at least one of the inverters; and
the first mode includes the capacitor providing supplemental power output from the fuel cell power plant when there is an increase in a load demand on the fuel cell power plant.
6. The fuel cell power plant of claim 1 , wherein the real power is a low voltage power less than or equal to 600 kilowatts.
7. The fuel cell power plant of claim 1 , comprising
a DC bus between the cell stack assembly and the plurality of inverters; and
a switching device that is controlled by the controller to selectively couple the cell stack assembly, the capacitor, and selected ones of the plurality of inverters respectively to the DC bus.
8. The fuel cell power plant of claim 8 , comprising
an output configured to be coupled to a load external to the fuel cell power plant;
an AC bus between the plurality of inverters and the output; and
at least one switching device that is controlled by the controller to selectively couple selected ones of the inverters to the output.
9. The fuel cell power plant of claim 1 , wherein the capacitor is the only source of power supplied by the fuel cell power plant external to the fuel cell power plant in the second mode.
10. The fuel cell power plant of claim 1 , wherein the second mode includes at least a first one of the inverters associated with the cell stack assembly, the first one of the inverters and the cell stack assembly providing power to at least one other component of the fuel cell power plant.
11. A method of operating a fuel cell power plant including a cell stack assembly, a capacitor, and a plurality of inverters, the method comprising:
controlling the plurality of inverters in a first mode and a second mode;
using the cell stack assembly and at least one associated one of the inverters for providing real power to a load external to the fuel cell power plant in the first mode;
and
using the capacitor and at least a second one of the inverters for selectively providing reactive power to or receiving reactive power from a grid external to the fuel cell power plant in the second mode.
12. The method of claim 11 , wherein the reactive power of the second mode is the only power output from the fuel cell power plant in the second mode that is external to the fuel cell power plant.
13. The method of claim 11 , wherein more than one of the inverters is associated with the capacitor in the second mode.
14. The method of claim 11 , comprising charging the capacitor using the reactive power received from the grid in the second mode.
15. The method of claim 11 , comprising providing supplemental power output from the fuel cell power plant using the capacitor and at least one of the inverters associated with the capacitor in the first mode when there is an increase in a load demand on the fuel cell power plant.
16. The method of claim 11 , wherein the real power is a low voltage power less than or equal to 600 kilowatts.
17. The method of claim 11 , wherein the capacitor is the only source of power supplied by the fuel cell power plant external to the fuel cell power plant in the second mode.
18. The method of claim 11 , comprising using the cell stack assembly and at least one associated one of the inverters for providing power to at least one other component of the fuel cell power plant in the second mode.
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US15/832,860 US20180181154A1 (en) | 2016-03-04 | 2017-12-06 | Fuel cell power plant with real and reactive power modes |
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US15/060,944 US11442483B2 (en) | 2016-03-04 | 2016-03-04 | Fuel cell power plant with real and reactive power modes |
US15/832,860 US20180181154A1 (en) | 2016-03-04 | 2017-12-06 | Fuel cell power plant with real and reactive power modes |
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US15/060,944 Continuation US11442483B2 (en) | 2016-03-04 | 2016-03-04 | Fuel cell power plant with real and reactive power modes |
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US15/832,860 Abandoned US20180181154A1 (en) | 2016-03-04 | 2017-12-06 | Fuel cell power plant with real and reactive power modes |
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KR102651202B1 (en) | 2024-03-27 |
ZA201806438B (en) | 2019-06-26 |
JP6975719B2 (en) | 2021-12-01 |
EP3424119A4 (en) | 2019-08-14 |
CN108886252A (en) | 2018-11-23 |
US11442483B2 (en) | 2022-09-13 |
CN108886252B (en) | 2023-05-09 |
JP2019509006A (en) | 2019-03-28 |
WO2017151340A1 (en) | 2017-09-08 |
KR20180114195A (en) | 2018-10-17 |
CA3014438A1 (en) | 2017-09-08 |
US20170255217A1 (en) | 2017-09-07 |
AU2017225510B2 (en) | 2021-11-04 |
EP3424119A1 (en) | 2019-01-09 |
AU2017225510A1 (en) | 2018-08-23 |
EP3424119B1 (en) | 2022-07-20 |
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