Classifications

• • H—ELECTRICITY
  • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
  • H02P—CONTROL OR REGULATION OF ELECTRIC MOTORS, ELECTRIC GENERATORS OR DYNAMO-ELECTRIC CONVERTERS; CONTROLLING TRANSFORMERS, REACTORS OR CHOKE COILS
  • H02P9/00—Arrangements for controlling electric generators for the purpose of obtaining a desired output
  • H02P9/007—Control circuits for doubly fed 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
  • 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
  • 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
  • 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
  • H02M1/00—Details of apparatus for conversion
  • H02M1/10—Arrangements incorporating converting means for enabling loads to be operated at will from different kinds of power supplies, e.g. from ac or dc
• • 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
  • H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
  • H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
  • H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
  • H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
  • H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
  • H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
  • H02M3/33573—Full-bridge at primary side of an isolation transformer
• • 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
  • H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
  • H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
  • H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
  • H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
  • H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
  • H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac 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
  • 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
  • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
  • H02M7/4807—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode having a high frequency intermediate AC stage
• • 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
  • 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
  • H02J2300/28—The renewable source being wind energy
• • 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
  • H02J2300/40—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation wherein a plurality of decentralised, dispersed or local energy generation technologies are operated simultaneously
• • 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
  • H02M1/00—Details of apparatus for conversion
  • H02M1/0048—Circuits or arrangements for reducing losses
  • H02M1/0054—Transistor switching losses
  • H02M1/0058—Transistor switching losses by employing soft switching techniques, i.e. commutation of transistors when applied voltage is zero or when current flow is zero
• • 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
  • H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
  • H02M7/4815—Resonant converters
• • 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
  • Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
  • Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
• • 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
  • Y02E10/00—Energy generation through renewable energy sources
  • Y02E10/70—Wind energy
  • Y02E10/72—Wind turbines with rotation axis in wind direction

Definitions

• the generator 106 includes a stator 114 and a rotor 116.
• the first conversion unit 108 is coupled to the rotor 116.
• the stator 114 is coupled to the one or more second conversion unit 202 and further, the stator 114 is coupled to the grid (not shown in FIG. 2).
• the DC source based power generation subsystem 104 includes a DC to DC converter 126, a differential mode filter 210, and a solar array 124.
• the solar array 124 is coupled to the DC to DC converter 126 via the differential mode filter 210. Further, the DC to DC converter 126 is coupled to the first DC link 112. Accordingly, the DC source based power generation subsystem 104 is coupled to the first DC link 112.
• the hybrid power generation system 300 includes a wind based power generation subsystem 102 coupled to a DC source based power generation subsystem 104 at a first DC link 112.
• the wind based power generation subsystem 102 includes a generator 106, a first conversion unit 108, and three second conversion units 202.
• the first conversion unit 108 is coupled to the three second conversion units 202 via a first DC link 112.
• Each of the second conversion units 202a, 202b, 202c includes a plurality of power conversion subunits 128.
• Each of the plurality of power conversion subunits 128 includes a first bridge circuit 130 coupled to a second bridge circuit 132 via a second transformer 134.
• each of the power conversion subunits 128 is coupled to a corresponding second DC to AC converter 203 via a corresponding second DC link 204.
• each of second conversion units 202a, 202b, 202c include a power conversion subunits 128, a portion on a first winding side of the second transformer 134 is galvanically isolated from a second winding side of the second transformer 134.
• the DC source based power generation subsystem 104 includes a power conversion subunits 128, a portion on a first winding side of the second transformer 134 is galvanically isolated from a second winding side of the second transformer 134.
• a mid-point of the first DC link 112 is coupled to a ground terminal 122.
• the solar array 124 is coupled to the ground terminal 122.
• the first transformer (not shown in FIG. 3) may be coupled to the ground terminal.
• the first DC link 112, the solar array 124, and the first transformer are circuit elements corresponding to the first, second, and third paths 302, 304, 306, respectively. Accordingly flow of any leakage current and use of common mode filter to prevent flow of leakage current in the hybrid power generation system 300 is prevented.
• the wind based power generation subsystem 102 includes a plurality of first conversion units 108 and a second conversion unit 202a.
• the plurality of first conversion units 108 are coupled to one another and further coupled to the rotor 116 via a rotor bus 116a corresponding to one phase of a plurality of AC phases.
• each of the plurality of first conversion units 108 are coupled to the rotor (not shown in FIG. 4) via an inductor 404.
• each of the plurality of first conversion units 108 are coupled to a neutral terminal 402.
• the second conversion unit 202a includes a plurality of power conversion subunits 128 and a plurality of second DC to AC converters 203.
• each of the first conversion unit 108 is further coupled to the corresponding power conversion subunit 128 via a corresponding first DC link 112.
• the second conversion unit 202a includes a plurality of second DC links 204.
• Each of the power conversion subunit 128 is coupled to a corresponding second DC to AC converter 203 via a second DC link 204.
• the plurality of second DC to AC converters 203 are coupled to each other in a series connection to form a AC phase terminal 206 and a neutral terminal 208.
• the second conversion unit 202a includes the AC phase terminal 206 and the neutral terminal 208.
• each of the DC source based power generation subsystem 104 includes a solar array 124 coupled to the corresponding first DC link 112 via a corresponding DC to DC converter 126, a corresponding differential mode filter 210, and a corresponding common mode filter 406. Accordingly, a plurality of strings of power generation 408, 410, 412 may be formed. Each of the plurality of strings of power generation 408, 410, 412 include one DC source based power generation subsystem 104, a corresponding first conversion units 108, a corresponding power conversion subunit 128, and a corresponding second DC to AC converters 203.
• Each of the solar array 124 includes a plurality of photovoltaic modules/battery modules.
• Various photovoltaic modules/ battery modules employed in the hybrid power generation system 400 are distributed among the solar array /battery banks 124 corresponding to each of the plurality of DC source based power generation subsystems 104.
• the solar array 124 corresponding to each of the plurality of DC source based power generation subsystems 104 may include 25 photovoltaic modules each.
• the total number of photovoltaic modules is distributed among the plurality of DC source based power generation subsystems 104.
• each of the plurality of power conversion subunits 128 includes a first bridge circuit 130 coupled to a second bridge circuit 132 via a second transformer 134. Therefore, a portion on a first winding side of the second transformer 134 is galvanically isolated from a second winding side of the second transformer 134. As a result of isolation of the portion on the first winding side of the second transformer 134 from the second winding side of the second transformer 134, a first path 414 and a second path 416 for each of the strings of power generation 408, 410, 412 is defined.
• the first path 414 of each of the strings of power generation 408, 410, 412 includes the first conversion unit 108, a corresponding first DC link 112, a corresponding DC source based power generation subsystems 104, and a corresponding first bridge circuit 130.
• the first path 414 includes the generator (not shown in FIG. 4), the rotor bus 116a.
• the second path 416 of each of the strings of power generation 408, 410, 412 includes a second bridge circuit 132 and a second DC to AC converter 203.
• a portion of the hybrid power generation system 400 along the first path 414 is isolated from a portion of the hybrid power generation system 400 along the second path 416. Therefore, for each of the strings of power generation 408, 410, 412, any circuit element in the first path 414 may be grounded together with any circuit element of the second path 416 of the corresponding string of power generation without causing a flow of leakage current. Accordingly, use of a common mode filter is avoided.
• the neutral terminal 402 is coupled to the ground terminal 122 and the solar array 124 is coupled to the ground terminal 122.
• the neutral terminal 402 and the solar array/ 124 both form a circuit element of the first path 414 and are therefore, not isolated from one another. Therefore, the common mode filter 406 is used in the DC source based power generation subsystem 104 to isolate the grounded neutral terminal 402 from the grounded solar array 124.
• the neutral terminal 402 is galvanically isolated from the solar array 124. In this embodiment, even if both the neutral terminal 402 and the solar array 124 are grounded, the flow of leakage current is prevented. Accordingly, the use of the common mode filter 406 in each of the DC source based power generation subsystem 104 is avoided. In yet another embodiment, if the neutral terminal is not grounded and is a floating system, the use of the common mode filter 406 in each of the DC source based power generation subsystem 104 may be avoided.
• each of the plurality of first conversion units 108 are coupled to both the rotor bus 116a and the neutral terminal 402 via corresponding inductors.
• the use of inductors aids in preventing circulating current in hybrid power generation system 400.
• the solar array 124 may be grounded along with a grounded neutral terminal 402 without use of a common mode filter and a power conversion subunit, such as the power conversion subunit 128, in the corresponding DC source based power generation subsystems 104.
• the value of inductance of the inductors may vary based on a mode of operation of the first conversion units 108.
• the mode of operation of the first conversion units 108 may include an interleaved mode of operation or a non-interleaved mode of operation.
• interleaved mode of operation refers to a mode of operation in which carrier signals for each of the first conversion units have same frequency and amplitude, but the carrier signals are phase shifted relative to each other over a carrier signal cycle.
• carrier signal of one first conversion unit may be spaced apart by 360/n degrees with respect to the carrier signal of another first conversion unit, where n is the number of first conversion units.
• FIG 5 is a diagrammatical representation 500 of an embodiment of a hybrid power generation system having distributed DC source based power generation subsystems.
• the hybrid power generation system 500 includes one or more DC source based power generation subsystems coupled to corresponding DC links of the one or more second conversion.
• FIG. 5 is another embodiment of the hybrid power generation system 400 of FIG. 4.
• the hybrid power generation system 500 includes a wind based power generation subsystem 102 and a plurality of DC source based power generation subsystems 104.
• the wind based power generation subsystem 102 includes the plurality of first conversion units 108 and a second conversion unit 202a.
• the second conversion unit 202a includes a plurality of power conversion subunits 128 and a plurality of second DC to AC converters 203.
• Each of the first conversion units 108 is coupled to the corresponding power conversion subunit 128 of the second conversion unit 202a via a corresponding first DC link 112.
• Each of the plurality of power conversion subunits 128 is coupled to a corresponding second DC to AC converter 203 via a second DC link 204.
• each of the DC source based power generation subsystem 104 includes a solar array 124 coupled to a corresponding second DC link 204 via a corresponding DC to DC converter 126 and a corresponding power conversion subunit 128.
• a plurality of strings of power generation 502, 504, 506 may be formed.
• each of the plurality of power conversion subunits 128 includes a first bridge circuit 130 coupled to a second bridge circuit 132 via a second transformer 134.
• a portion on a first winding side of the second transformer 134 is galvanically isolated from a second winding side of the second transformer 134.
• a first path 508, a second path 510, and a third path 512 of the hybrid power generation system 500 may be defined.
• the first, second, and third paths 508, 510, and 512 are isolated from one another.
• the first path 508 of each of the plurality of strings of power generation 502, 504, 506 includes one first conversion unit 108, a corresponding first DC link 112, and a corresponding first bridge circuit 130 of the second conversion unit 202a.
• the second path 510 of each of the plurality of strings of power generation 502, 504, 506 includes the second bridge circuit 132 of the second conversion unit 202a, a corresponding second DC to AC converter 203 and a second bridge circuit 132 of a corresponding DC source based power generation subsystem 104.
• the third path 512 of each of the plurality of strings of power generation 502, 504, 506 includes one solar array 124, a corresponding DC to DC converter 126, and a corresponding first bridge circuit 130 of a DC source based power generation subsystem 104.
• the neutral terminal 402 is coupled to the ground terminal 122 and the solar array 124 is also coupled to the ground terminal 122.
• the neutral terminal 402 is a circuit element of the first path 508 and the solar array 124 is a circuit element of the third path 512 and are isolated from one another to prevent flow of a leakage current in the hybrid power generation system 500. Therefore, a common mode filter need not be employed in the hybrid power generation system 500 and particularly, in the DC source based power generation subsystems 104.
• FIG. 4 and 5 represent a single-phase hybrid power generation system, based on the type of application, the number of phases of the hybrid power generation system may vary.
• use of the power conversion subunit 128 aids in isolating two portions of the hybrid power generation system.
• the DC source based power generation subsystems are isolated from the wind based power generation subsystem.
• the use of the power conversion subunit 128 aids in preventing flow of leakage current in the hybrid power generation system.
• use of a common mode filter is avoided. Any power generation system which do not employ a common mode filter have a better footprint, higher reliability, and cost saving when compared to the hybrid power generation systems employing the common mode filter.
• presence of multiple DC links in the hybrid power generation system aids in distribution of the energy sources, such as photovoltaic modules and battery modules. Distribution of the energy sources in the hybrid power generation system aids in enhanced maximum power point tracking in the case of photovoltaic modules and enhanced state of charge management in the case of battery modules.
• the hybrid power generation systems of the present disclosure may find application in wind solar hybrid power generation system and any other system employing the wind based power generation subsystem.
• the wind based power generation subsystem may be either doubly fed induction generator based or full power conversion based wind turbines.

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• Engineering & Computer Science (AREA)
• Power Engineering (AREA)
• Inverter Devices (AREA)
• Control Of Eletrric Generators (AREA)
• Supply And Distribution Of Alternating Current (AREA)

Priority Applications (2)

Applications Claiming Priority (2)

Publications (1)

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Citations (9)

Family Cites Families (6)

• 2018
  • 2018-07-18 EP EP18838548.8A patent/EP3658769A4/de not_active Withdrawn
  • 2018-07-18 WO PCT/US2018/042716 patent/WO2019023023A1/en active Application Filing
  • 2018-07-18 CN CN201880063148.6A patent/CN111108290A/zh active Pending

Patent Citations (9)

Non-Patent Citations (1)

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