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NZ749353B2 - Method and apparatus for bidirectional storage and renewable power converter - Google Patents
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NZ749353B2 - Method and apparatus for bidirectional storage and renewable power converter - Google Patents

Method and apparatus for bidirectional storage and renewable power converter Download PDF

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Publication number
NZ749353B2
NZ749353B2 NZ749353A NZ74935318A NZ749353B2 NZ 749353 B2 NZ749353 B2 NZ 749353B2 NZ 749353 A NZ749353 A NZ 749353A NZ 74935318 A NZ74935318 A NZ 74935318A NZ 749353 B2 NZ749353 B2 NZ 749353B2
Authority
NZ
New Zealand
Prior art keywords
energy storage
bidirectional
power
storage system
inverter
Prior art date
Application number
NZ749353A
Other versions
NZ749353A (en
Inventor
John C Palombini
Apurva Somani
Original Assignee
Dynapower Company Llc
Filing date
Publication date
Application filed by Dynapower Company Llc filed Critical Dynapower Company Llc
Priority claimed from PCT/US2018/046427 external-priority patent/WO2019036325A1/en
Publication of NZ749353A publication Critical patent/NZ749353A/en
Publication of NZ749353B2 publication Critical patent/NZ749353B2/en

Links

Classifications

    • H02J2300/20—
    • H02J2300/24—
    • H02J2300/26—
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; 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 networks by storage of energy
    • H02J3/32—Arrangements for balancing of the load in networks by storage of energy using batteries or super capacitors with converting means
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; 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 feeding a single network from two or more generators or sources in parallel; Arrangements for feeding already energised networks from additional generators or sources in parallel
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—ELECTRIC POWER NETWORKS; 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 feeding a single network from two or more generators or sources in parallel; Arrangements for feeding already energised networks from additional generators or sources in parallel
    • H02J3/381—Dispersed generators
    • H02J7/0068—
    • 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
    • H02M7/66—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal
    • H02M7/68—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal by static converters
    • H02M7/72—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/79—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
    • H02M7/797—Conversion of AC power input into DC power output; Conversion of DC power input into AC power output with possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
    • H02S40/00—Components or accessories in combination with PV modules, not provided for in groups H02S10/00 - H02S30/00
    • H02S40/30—Electrical components
    • H02S40/32—Electrical components comprising DC/AC inverter means associated with the PV module itself, e.g. AC modules
    • 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
    • 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
    • Y02E70/00—Other energy conversion or management systems reducing GHG emissions
    • Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/12—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation
    • Y04S10/123—Monitoring or controlling equipment for energy generation units, e.g. distributed energy generation [DER] or load-side generation the energy generation units being or involving renewable energy sources
    • 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
    • Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
    • Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
    • Y04S10/00—Systems supporting electrical power generation, transmission or distribution
    • Y04S10/14—Energy storage units

Abstract

energy storage system for renewable energy applications includes a renewable energy source, a bidirectional inverter connected an AC bus and a DC bus, an energy storage unit connected to the bidirectional DC/DC converter, and a control system comprising one or more controllers coupled to the bidirectional inverter and the bidirectional DC/DC converter. The bidirectional inverter is connected to the renewable energy source and a bidirectional DC/DC converter through the DC bus. The control system is configured to facilitate the operation of the bidirectional DC/DC converter and the bidirectional inverter. The energy storage system both stores energy from the renewable energy source and a utility grid, and also supplies power to the utility grid. The energy storage system is utilized in a method for supporting frequency regulation of a utility grid and a method for controlling an output power ramp rate for a renewable energy storage system.

Claims (14)

1. An energy storage system for renewable energy applications, comprising: a renewable energy source; a bidirectional inverter connected to an AC bus and a DC bus, wherein the bidirectional inverter is connected to the renewable energy source and a bidirectional DC/DC converter through the DC bus; an energy storage unit connected to the bidirectional DC/DC converter; and a control system comprising one or more controllers coupled to the bidirectional inverter and the bidirectional DC/DC converter, the control system configured to facilitate the operation of the bidirectional DC/DC converter and the bidirectional inverter; wherein the control system controls the bidirectional inverter to operate in a maximum power point tracking (MPPT) mode or a grid storage mode, and the control unit controls an on-the-fly transition between MPPT mode and the grid storage mode; and wherein, when the bidirectional inverter is operating in the MPPT mode, the control system controls the bidirectional inverter to operate at a maximum power point by controlling an impedance of the bidirectional inverter.
2. The energy storage system of claim 1, wherein the renewable energy source is at least one of a photovoltaic (PV) array, a wind energy source, or a hydro energy source.
3. The energy storage system of claim 1, wherein the bidirectional inverter is connected to at least one of a utility grid, a local load, or a microgrid through the AC bus.
4. The energy storage system of claim 3, wherein the control system further comprises one or more sensors, the one or more sensors configured to sense at least one of voltage magnitude, frequency, and phase.
5. The energy storage system of claim 4, wherein the control system is configured to synchronize the frequency, phase, and magnitude of the voltage or current of the inverter when providing power to the at least one of a utility grid, local load, or microgrid.
6. The energy storage system of claim 1, wherein the energy storage unit is at least one of a battery, a battery bank, or a flywheel energy storage unit.
7. The energy storage system of claim 3, wherein the control system selectively enables the operation of the bidirectional inverter and the bidirectional DC/DC converter to export power generated by the renewable energy source to a grid, charge the energy storage unit from the grid, or discharge the energy storage unit to the grid.
8. The energy storage system of claim 1, wherein the renewable energy source is a photovoltaic (PV) array and the control system is configured to sample an output power from the PV array and selectively apply voltage to obtain a maximum power.
9. The energy storage system of claim 9, wherein the bidirectional inverter includes a plurality of DC connections at the DC bus for a single AC output at the AC bus, wherein the bidirectional inverter is configured to optimize a maximum power for each of the plurality of DC connections.
10. The energy storage system of claim 9, wherein the on-the-fly transition between MPPT mode and the grid storage mode is controlled by the control unit when an output power of the PV array is less than a predetermined threshold power.
11. The energy storage system of claim 1, wherein the bidirectional inverter is a bidirectional PV inverter and the renewable energy source is a PV array, the bidirectional PV inverter comprising: one or more semiconductor switches, wherein gates of the semiconductor switches receive a plurality of switching pulses from the control system to convert DC power received from the PV array to AC power, or to convert AC power received through the AC bus to DC power.
12. The energy storage system of claim 1, wherein the energy storage unit is configured to store energy from both the renewable energy source and a grid.
13. The energy storage system of claim 1, wherein the control system is configured to: receive a power command from a utility; control supplying power to the utility grid for frequency regulation when the power command is a positive power command; and control absorbing power from the utility grid when the power command is a negative power command.
14. The energy storage system of claim 1, substantially as herein described with reference to any embodiment disclosed.
NZ749353A 2018-08-13 Method and apparatus for bidirectional storage and renewable power converter NZ749353B2 (en)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US201762545159P 2017-08-14 2017-08-14
PCT/US2018/046427 WO2019036325A1 (en) 2017-08-14 2018-08-13 Method and apparatus for bidirectional storage and renewable power converter

Publications (2)

Publication Number Publication Date
NZ749353A NZ749353A (en) 2024-08-30
NZ749353B2 true NZ749353B2 (en) 2024-12-03

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