WO2020057635A1 - 一种光伏发电逆变系统 - Google Patents

一种光伏发电逆变系统 Download PDF

Info

Publication number
WO2020057635A1
WO2020057635A1 PCT/CN2019/106971 CN2019106971W WO2020057635A1 WO 2020057635 A1 WO2020057635 A1 WO 2020057635A1 CN 2019106971 W CN2019106971 W CN 2019106971W WO 2020057635 A1 WO2020057635 A1 WO 2020057635A1
Authority
WO
WIPO (PCT)
Prior art keywords
unit
bus
inverter
photovoltaic
voltage
Prior art date
Application number
PCT/CN2019/106971
Other languages
English (en)
French (fr)
Inventor
张彦忠
王勋
欣普夫纳•罗兰
Original Assignee
华为技术有限公司
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 华为技术有限公司 filed Critical 华为技术有限公司
Priority to EP19862695.4A priority Critical patent/EP3771065B1/en
Priority to AU2019343425A priority patent/AU2019343425B2/en
Publication of WO2020057635A1 publication Critical patent/WO2020057635A1/zh
Priority to US17/113,453 priority patent/US11217999B2/en

Links

Images

Classifications

    • H02J3/383—
    • 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
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • 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
    • H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
    • H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
    • H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
    • 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
    • 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 application relates to the field of photovoltaic power generation technology, and particularly to a photovoltaic power generation inverter system.
  • renewable energy has received widespread attention.
  • renewable energy compared to traditional fossil energy power generation, the environmental pollution caused by solar power generation is small.
  • photovoltaic power generation systems the performance, reliability and management technology of photovoltaic power generation are becoming more mature.
  • inverter architectures there are three types of inverter architectures in photovoltaic power generation systems: centralized, distributed, and distributed. Among them, the current in photovoltaic power generation systems of three types of centralized, distributed, and distributed architectures becomes large, resulting in an increase in energy loss of the photovoltaic system.
  • the embodiments of the present application provide a photovoltaic power generation system, which can increase the voltage of the photovoltaic system and reduce the current of the photovoltaic power generation system under the same power conversion conditions, thereby saving energy consumption and reducing the cost of the photovoltaic system.
  • an embodiment of the present application provides a photovoltaic power generation inverter system including a photovoltaic array, a first DC conversion unit, a first bus bar unit, and a first inverter unit, wherein the photovoltaic array is one or Multiple photovoltaic arrays, each photovoltaic array including one or more panels, the number of the first DC conversion unit is one or more; the input end of a first DC conversion unit and one or more photovoltaics The output terminals of the array are connected, the first bus unit is connected to the output of one or more first DC conversion units, the first bus unit is connected to the first inverter unit, and the first The DC voltage of the bus unit is greater than the maximum system voltage applied to the battery panel; the first DC conversion unit is configured to perform DC power conversion on the DC voltage output by the photovoltaic array; and the first inverter unit is configured to convert The DC voltage of the first bus bar unit is converted into an AC voltage.
  • a positive output terminal, a midpoint potential, and a negative output terminal of the first DC conversion unit are respectively connected to the positive,
  • the midpoint potential and the negative electrode are coupled in a one-to-one correspondence; or, the positive output terminal and the negative output terminal of the first DC conversion unit are respectively coupled and connected in a one-to-one correspondence with the positive and negative electrodes of the first busbar unit.
  • the first bus bar unit is coupled to the first inverter unit through a positive electrode, a midpoint potential, and a negative electrode; or, the first The bus unit is coupled to the first inverter unit through a positive electrode and a negative electrode.
  • an embodiment of the present application provides a photovoltaic power generation inverter system, including: a photovoltaic array, a second DC conversion unit, a second bus unit, a second inverter unit, and a first transformer, wherein the photovoltaic array Is one or more photovoltaic arrays, and the number of the second DC conversion units is one or more; an input end of one second DC conversion unit is connected to an output end of one or more photovoltaic arrays, and the second bus bar unit Is connected to the output of one or more second DC conversion units, the input of the second inverter unit is connected to the second bus unit, and the output of the second inverter unit is connected to the first transformer And the line voltage of the secondary side of the first transformer is an AC voltage greater than 1000V, and the primary side of the first transformer is connected to the power grid; the second DC conversion unit is configured to connect the The DC voltage output by the photovoltaic array performs DC power conversion; the second inverter unit is configured to convert the DC voltage of the
  • a positive output terminal, a midpoint potential, and a negative output terminal of the second DC conversion unit are respectively connected to the positive and middle terminals of the second busbar unit.
  • the point potential and the negative electrode are coupled and connected in a one-to-one correspondence; or, the positive output terminal and the negative output terminal of the second DC conversion unit are respectively coupled and connected in a one-to-one correspondence with the positive and negative electrodes of the second busbar unit.
  • the second busbar unit is coupled to the second inverter unit through a positive electrode, a midpoint potential, and a negative electrode; or, the second The bus unit is coupled to the second inverter unit through a positive electrode and a negative electrode.
  • an embodiment of the present application provides a photovoltaic power generation inverter system, including: a photovoltaic array, a third bus unit, a third inverter unit, and a second transformer, wherein the photovoltaic array is one or more photovoltaics Array; the third busbar unit is connected to one or more photovoltaic arrays, the third busbar unit is connected to the input terminal of the third inverter unit, and the output end of the third inverter unit is connected to the first The secondary sides of the two transformers are connected, and the line voltage of the secondary side of the second transformer is an AC voltage greater than 1000V, and the primary side of the second transformer is connected to the power grid; the photovoltaic array is used to generate DC power; The third inverter unit is configured to convert the DC voltage of the third bus unit to an AC voltage; and the second transformer is configured to transmit the AC voltage output by the third inverter unit to the power grid.
  • the positive electrode output terminal and the negative electrode output terminal of the photovoltaic array are respectively coupled to the positive electrode and the negative electrode of the second busbar unit in a one-to-one correspondence.
  • the third bus unit is coupled to the third inverter unit through a positive electrode, a midpoint potential, and a negative electrode; or, the third The bus unit is coupled to the third inverter unit through a positive electrode and a negative electrode.
  • an embodiment of the present application provides a photovoltaic power generation inverter system, including: a photovoltaic array, a third DC conversion unit, a fourth bus unit, and a seventh inverter unit, wherein the photovoltaic array is one or more Photovoltaic arrays, the number of the third DC conversion units is one or more; the input end of a third DC conversion unit is connected to the output end of one or more photovoltaic arrays, and the fourth bus bar unit is connected to one or more The output ends of three DC conversion units are connected, the seventh inverter unit is connected to the fourth bus unit, and the DC voltage on the fourth bus unit is greater than 1000V; the third DC conversion unit is used for Converting the DC voltage output by the photovoltaic array to DC power; the seventh inverter unit is configured to convert the DC voltage of the fourth bus unit into an AC voltage.
  • a positive output terminal, a midpoint potential, and a negative output terminal of the third DC conversion unit are respectively connected to the positive, middle, and fourth terminals of the fourth busbar unit.
  • the point potential and the negative electrode are coupled in a one-to-one correspondence; or, the positive output terminal and the negative output terminal of the third DC conversion unit are respectively one-to-one correspondingly coupled to the positive and negative electrodes of the fourth busbar unit.
  • the fourth bus unit is coupled to the seventh inverter unit through a positive electrode, a midpoint potential, and a negative electrode; or, the fourth The bus unit is coupled to the seventh inverter unit through a positive electrode and a negative electrode.
  • an embodiment of the present application provides a photovoltaic power generation inverter system, including: a photovoltaic array, a fourth DC conversion unit, a fifth bus unit, and a fifth inverter unit, wherein the photovoltaic array is one or more Photovoltaic arrays, the number of the fourth DC conversion units is one or more; the input end of a fourth DC conversion unit is connected to the output end of one or more photovoltaic arrays, and the fifth bus unit is connected to one or more The output ends of three DC conversion units are connected, the fifth inverter unit is connected to the fifth bus unit, and the DC voltage on the fifth bus unit is greater than 1500V; the fourth DC conversion unit is used for Convert the DC voltage output by the photovoltaic array to DC power; the fifth inverter unit is configured to convert the DC voltage of the fifth bus unit into an AC voltage.
  • a positive output terminal, a midpoint potential, and a negative output terminal of the fourth DC conversion unit are respectively connected to the positive and middle terminals of the fifth bus unit.
  • the point potential and the negative electrode are one-to-one correspondingly coupled and connected; or, the positive output terminal and the negative output terminal of the fourth DC conversion unit are respectively one-to-one correspondingly coupled and connected to the positive and negative electrodes of the fifth busbar unit.
  • the fifth bus unit is coupled to the fifth inverter unit through a positive electrode, a midpoint potential, and a negative electrode; or the fifth The bus unit is coupled to the fifth inverter unit through a positive electrode and a negative electrode.
  • the photovoltaic array is used to convert solar energy into electrical energy, that is, to generate DC power and output DC voltage.
  • the bus unit is used to convert the DC energy output by the DC conversion unit or directly output the DC energy output by the photovoltaic array. Storage is performed to increase the bus voltage between the positive and negative poles of the first bus unit.
  • the bus voltage is a DC voltage.
  • the inverter unit converts the bus voltage on the bus unit into an AC voltage to transmit energy to the power grid. From the above technical solutions, it can be known that as the bus voltage in the line unit is increased, that is, the input voltage of the inverter unit is increased.
  • a low-voltage small-diameter cable can be selected to reduce the cost and loss of the DC cable, and the reduction of the AC current output from the inverter reduces the cost and loss of the AC cable, thereby Save the cost of photovoltaic power inverter system.
  • FIG. 1 is a schematic diagram of an embodiment of a photovoltaic power generation inverter system according to an embodiment of the present application
  • FIG. 2 is a schematic diagram of another embodiment of a photovoltaic power generation inverter system according to an embodiment of the present application
  • FIG. 3 is a schematic diagram of another embodiment of a photovoltaic power generation inverter system according to an embodiment of the present application.
  • FIG. 4 is a schematic diagram of another embodiment of a photovoltaic power generation inverter system according to an embodiment of the present application.
  • FIG. 5 is a schematic diagram of another embodiment of a photovoltaic power generation inverter system according to an embodiment of the present application.
  • FIG. 6 is a schematic diagram of an embodiment of a DC conversion unit according to an embodiment of the present application.
  • the embodiments of the present application provide a photovoltaic power generation inverter system, which is used to increase the input voltage and grid-connected voltage of an inverter under the same power conversion conditions, and reduce the energy loss in the photovoltaic power generation inverter system.
  • the naming or numbering of steps in this application does not mean that the steps in the method flow must be executed in the time / logical order indicated by the naming or numbering.
  • the named or numbered process steps can be implemented according to the Technical purposes change the execution order, as long as the same or similar technical effects can be achieved.
  • the division of modules appearing in this application is a logical division. In actual applications, there can be other divisions. For example, multiple modules can be combined or integrated in another system, or some features can be ignored. , Or not executed.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be through some interfaces.
  • the indirect coupling or communication connection between the modules may be electrical or other similar forms. There are no restrictions in the application.
  • modules or sub-modules described as separate components may or may not be physically separated, may or may not be physical modules, or may be distributed into multiple circuit modules, and some or all of them may be selected according to actual needs. Module to achieve the purpose of the solution of this application.
  • the embodiments of the present application are applicable to photovoltaic power generation, converting solar energy into electric energy through photovoltaic panels, and incorporating the electric energy into a power grid. Since the electricity converted by photovoltaic panels is direct current, and the grid is transmitted as alternating current, after the photovoltaic panel converts solar energy to direct current, the direct current needs to be converted to three-phase alternating current before being integrated into the grid through a step-up transformer In the embodiment of the present application, the photovoltaic power generation inverter system is used to convert the direct current output by the photovoltaic panel into alternating current to transmit energy to the power grid.
  • the photovoltaic power generation inverter system provided in the embodiment of the present application can increase the input voltage of the inverter unit under the same power conversion conditions, and can effectively reduce the DC bus current in the photovoltaic power generation inverter system and the inverter unit after the inverter is inverted.
  • the AC current will be reduced accordingly. Therefore, the power loss in the photovoltaic power inverter system will be reduced.
  • FIG. 1 is a schematic diagram of a photovoltaic power generation inverter system according to an embodiment of the present application.
  • the photovoltaic power generation inverter system includes: a photovoltaic array 101, a first DC conversion unit 102, a first bus bar unit 103, and a first inverter unit 104, where the photovoltaic array 101 is a Or multiple photovoltaic arrays, each photovoltaic array including one or more panels.
  • the positive input terminal of the first DC conversion unit 102 is connected to the positive output terminal of the photovoltaic array 101, the negative output terminal of the first DC conversion unit 102 is connected to the negative output terminal of the photovoltaic array 101, and the first DC conversion unit
  • the positive output terminal of 102 is connected to the positive pole of the first bus bar unit 103, the negative output terminal of the first DC conversion unit 102 is connected to the negative pole of the first bus bar unit 103, and the bus bar between the positive and negative poles of the first bus bar unit 103
  • the voltage is greater than the maximum system voltage applied to the panel in the photovoltaic array, and the first bus unit 103 is connected to the first inverter unit 104.
  • the photovoltaic array 101 When the photovoltaic power generation inverter system works normally, the photovoltaic array 101 generates DC power, and the first DC conversion unit 102 converts the DC power generated by the photovoltaic array 101 to DC power and inputs it to the first bus unit 103 for storage.
  • the inverter unit 104 converts the DC power stored between the positive and negative electrodes of the first bus bar unit 103 into AC power to transmit energy to the power grid.
  • the DC conversion unit may be one or more. When there are multiple DC conversion units, one DC conversion unit may be connected to the corresponding one or more photovoltaic arrays.
  • the bus bar unit may also be one or more. When there are multiple bus bar units, one bus bar unit may be connected to the corresponding one or more DC conversion units.
  • the positive output terminal, the midpoint potential, and the negative output terminal of the first DC conversion unit 102 are respectively one-to-one correspondingly coupled to the positive pole, the midpoint potential, and the negative pole of the first busbar unit 103.
  • Connection, wherein the coupling between the midpoint potential of the first DC conversion unit 102 and the midpoint potential of the first bus bar unit 103 is as shown by the dotted line between the first DC conversion unit 102 and the first bus bar unit 103 in FIG. 1 As shown.
  • the positive output terminal and the negative output terminal of the first DC conversion unit 102 are respectively coupled to the positive and negative electrodes of the first busbar unit 103 in a one-to-one correspondence.
  • the first busbar unit 103 is coupled to the first inverter unit 104 through a positive electrode, a midpoint potential, and a negative electrode, and the midpoint potential of the first busbar unit 103 is inverse to the first inverse.
  • the coupling connection of the midpoint potential of the transformation unit 104 is shown as a dashed line portion between the first bus unit 103 and the first inverter unit 104 in FIG. 1.
  • the first bus unit is coupled to the first inverter unit through a positive electrode and a negative electrode.
  • FIG. 2 is a schematic diagram of another embodiment of a photovoltaic power generation inverter system according to an embodiment of the present application.
  • a photovoltaic power generation inverter system includes a photovoltaic array 201, a second DC conversion unit 202, a second bus bar unit 203, a second inverter unit 204, and a first transformer 205, where the photovoltaic array is one or more PV array.
  • the positive input terminal of the second DC conversion unit 202 is connected to the positive output terminal of the photovoltaic array 201, the negative input terminal of the second DC conversion unit is connected to the negative output terminal of the photovoltaic array 201, and the positive output of the second DC conversion unit 202 is Is connected to the positive pole of the second bus bar unit 203, the negative output of the second DC conversion unit 202 is connected to the negative pole of the second bus bar unit 203, the positive and negative poles of the second bus bar unit 203 are connected to the input terminal of the second inverter unit 204 Connected, the output of the second inverter unit 204 is connected to the secondary side of the first transformer 205, and the primary side of the first transformer 205 is connected to the power grid 206.
  • the photovoltaic power generation inverter system works normally, the photovoltaic array 201 generates DC power, and the second DC conversion unit 202 converts the DC power generated by the photovoltaic array 201 to DC power and inputs it to the second bus unit 203 for storage.
  • the transformer unit 204 converts the DC power stored between the positive and negative poles of the second busbar unit 203 into AC power, and the first transformer 205 outputs the AC voltage output from the second inverter unit 204 to the power grid 206, wherein the photovoltaic power generation inverter system works normally
  • the line voltage of the secondary side of the first transformer 205 is an AC voltage greater than 1000V.
  • the DC conversion unit may be one or more. When there are multiple DC conversion units, one DC conversion unit may be connected to the corresponding one or more photovoltaic arrays.
  • the bus bar unit may also be one or more. When there are multiple bus bar units, one bus bar unit may be connected to the corresponding one or more DC conversion units.
  • the positive output terminal, the midpoint potential, and the negative output terminal of the second DC conversion unit 202 are respectively coupled to the positive pole, the midpoint potential, and the negative pole of the second busbar unit 203 in a one-to-one correspondence.
  • the coupling connection between the midpoint potential of the second DC conversion unit 202 and the midpoint potential of the second bus bar unit 203 is as shown by the dotted line between the second DC conversion unit 202 and the second bus bar unit 203 in FIG. 2. Show.
  • the positive output terminal and the negative output terminal of the second DC conversion unit 202 are respectively coupled to the positive and negative electrodes of the second busbar unit 203 in a one-to-one correspondence.
  • the second busbar unit 203 is coupled to the second inverter unit 204 through a positive electrode, a midpoint potential, and a negative electrode, and the midpoint potential of the second busbar unit 203 is connected to the second inverter unit.
  • the 204 coupling connection is shown as a dotted line between the second bus unit 203 and the second inverter unit 204 in FIG. 2.
  • the second bus bar unit 203 is coupled to the second inverter unit 204 through a positive electrode and a negative electrode.
  • FIG. 3 is a schematic diagram of another embodiment of a photovoltaic power generation inverter system according to an embodiment of the present application.
  • the photovoltaic power generation inverter system includes: a photovoltaic array 301, a third bus unit 302, a third inverter unit 303, and a second transformer 304, where the photovoltaic array is one or more photovoltaics Array.
  • the positive electrode and the negative electrode of the photovoltaic array 301 are respectively connected to the positive electrode and the negative electrode of the third bus unit 302, the third bus unit 302 is connected to the input terminal of the third inverter unit 303, and the output terminal of the third inverter unit 303 is connected to The secondary side of the second transformer 304 is connected, and the primary side of the second transformer 304 is connected to the power grid 305.
  • the photovoltaic power generation inverter system works normally, the photovoltaic array 301 generates DC power, the third bus unit 302 stores the DC power generated by the photovoltaic array 301, and the third inverter unit 303 stores the voltage between the positive and negative electrodes of the third bus unit 302. The stored DC power is converted into AC power, and the second transformer 304 outputs the AC voltage output from the third inverter unit 303 to the power grid 305.
  • the line voltage of the secondary side of the second transformer 304 is greater than 1000V AC voltage.
  • the DC conversion unit may be one or more. When there are multiple DC conversion units, one DC conversion unit may be connected to the corresponding one or more photovoltaic arrays.
  • the bus bar unit may also be one or more. When there are multiple bus bar units, one bus bar unit may be connected to the corresponding one or more DC conversion units.
  • the positive electrode output terminal and the negative electrode output terminal of the photovoltaic array 301 are respectively coupled to the positive electrode and the negative electrode of the second busbar unit 302 in a one-to-one correspondence.
  • the third busbar unit 302 is coupled to the third inverter unit 303 through a positive electrode, a midpoint potential, and a negative electrode, wherein the midpoint potential of the third busbar unit 302 and the third inverse
  • the coupling connection between the midpoint potentials of the transformation unit 303 is shown as a dotted line portion between the third bus unit 302 and the third inverter unit 303 in FIG. 3.
  • the third bus unit 302 is coupled to the third inverter unit 303 through a positive electrode and a negative electrode.
  • FIG. 4 is a schematic diagram of another embodiment of a photovoltaic power generation inverter system according to an embodiment of the present application.
  • a photovoltaic power generation inverter system includes a photovoltaic array 401, a third DC conversion unit 402, a fourth bus bar unit 403, and a fourth inverter unit 404, where the photovoltaic array is one or more Photovoltaic arrays.
  • the positive input terminal of the third DC conversion unit 402 is connected to the positive output terminal of the photovoltaic array 401
  • the negative output terminal of the third DC conversion unit 402 is connected to the negative output terminal of the photovoltaic array 401
  • the positive electrode of the third DC conversion unit 402 The output terminal is connected to the positive pole of the fourth bus unit 403, the negative output terminal of the third DC conversion unit 402 is connected to the negative pole of the fourth bus unit 403, and the bus voltage between the positive and negative poles of the fourth bus unit 403 is greater than 1000V.
  • the fourth bus unit 403 is connected to the fourth inverter unit 404.
  • the photovoltaic array 401 When the photovoltaic power generation inverter system works normally, the photovoltaic array 401 generates DC power.
  • the third DC conversion unit 402 converts the DC power generated by the photovoltaic array 401 to DC power and inputs it to the fourth bus unit 403 for storage.
  • the converting unit 404 converts the DC power stored between the positive and negative electrodes of the fourth bus bar unit 403 into AC power to input energy to the power grid.
  • the DC conversion unit may be one or more. When there are multiple DC conversion units, one DC conversion unit may be connected to the corresponding one or more photovoltaic arrays.
  • the bus bar unit may also be one or more. When there are multiple bus bar units, one bus bar unit may be connected to the corresponding one or more DC conversion units.
  • the positive output terminal, the midpoint potential, and the negative output end of the third DC conversion unit 402 are respectively coupled to the positive pole, the midpoint potential, and the negative pole of the fourth busbar unit 403 in a one-to-one correspondence.
  • the coupling connection between the midpoint potential of the third DC conversion unit 402 and the midpoint potential of the fourth bus bar unit 403 is shown as a dotted line between the third DC conversion unit 402 and the fourth bus bar unit 403 in FIG. 4.
  • the positive output terminal and the negative output terminal of the third DC conversion unit 402 are respectively coupled to the positive and negative electrodes of the fourth busbar unit 403 in a one-to-one correspondence.
  • the fourth bus unit 403 is coupled to the fourth inverter unit 404 through a positive electrode, a midpoint potential, and a negative electrode, and the midpoint potential of the fourth bus unit 403 is inverse to the fourth inverse.
  • the coupling unit 404 is shown as a dotted line between the fourth bus unit 403 and the fourth inverter unit 404 in FIG. 4.
  • the fourth bus unit 403 is coupled to the fourth inverter unit 404 through a positive electrode and a negative electrode.
  • FIG. 5 is a schematic diagram of another embodiment of a photovoltaic power generation inverter system according to an embodiment of the present application.
  • a photovoltaic power generation inverter system includes a photovoltaic array 501, a fourth DC conversion unit 502, a fifth bus unit 503, and a fifth inverter unit 504, where the photovoltaic array is one or more Photovoltaic arrays.
  • the positive input terminal of the fourth DC conversion unit 502 is connected to the positive output terminal of the photovoltaic array 501, the negative output terminal of the fourth DC conversion unit 502 is connected to the negative output terminal of the photovoltaic array 501, and the positive electrode of the fourth DC conversion unit 502
  • the output terminal is connected to the positive pole of the fifth bus unit 503, the negative output terminal of the fourth DC conversion unit 502 is connected to the negative pole of the fifth bus unit 503, and the bus voltage between the positive and negative poles of the fifth bus unit 503 is greater than 1500V
  • the fifth bus unit 503 is connected to the fifth inverter unit 504.
  • the photovoltaic array 501 When the photovoltaic power generation inverter system works normally, the photovoltaic array 501 generates DC power.
  • the fourth DC conversion unit 502 converts the DC power generated by the photovoltaic array 501 to DC power and inputs it to the fifth bus unit 503 for storage.
  • the transforming unit 504 converts the DC power stored between the positive and negative electrodes of the fifth bus bar unit 503 into AC power to input energy to the power grid.
  • the DC conversion unit may be one or more. When there are multiple DC conversion units, one DC conversion unit may be connected to the corresponding one or more photovoltaic arrays.
  • the bus bar unit may also be one or more. When there are multiple bus bar units, one bus bar unit may be connected to the corresponding one or more DC conversion units.
  • a positive output terminal, a midpoint potential, and a negative output terminal of the fourth DC conversion unit 502 are respectively coupled to the positive, midpoint potential, and negative electrodes of the fifth busbar unit 503 in a one-to-one correspondence.
  • the coupling connection between the midpoint potential of the fourth DC conversion unit 502 and the midpoint potential of the fifth bus bar unit 503 is shown as a dotted line in FIG. 5.
  • the positive output terminal and the negative output terminal of the fourth DC conversion unit 502 are respectively coupled to the positive and negative electrodes of the fifth bus unit 503 in a one-to-one correspondence.
  • the fifth bus unit 503 is coupled to the fifth inverter unit 504 through a positive electrode, a midpoint potential, and a negative electrode, and the midpoint potential of the fifth bus unit is inversely connected to the fifth inverter.
  • the connection of the unit 504 is shown as a dotted line in FIG. 5.
  • the fifth bus unit 503 is coupled to the fifth inverter unit 504 through a positive electrode and a negative electrode.
  • FIG. 6 is a schematic diagram of an embodiment of a DC conversion unit according to an embodiment of the present application.
  • the DC conversion unit described in any one of the above FIG. 1, FIG. 2, FIG. 4, and FIG. 5 may include, but is not limited to, the DC conversion unit shown in FIG. 6.
  • the DC conversion unit 601 includes a first-stage DC-to-DC sub-unit 6011, a second-stage DC-to-DC sub-unit 6012, and a DC output bus 6013.
  • the structure of the DC output bus bar 6013 is similar to that of the bus unit.
  • the DC output bus bar 6013 is also composed of two capacitors, which constitute the midpoint potential of the DC output bus bar 6013.
  • the positive electrode of the upper capacitor is the positive electrode of the DC output bus bar 6013.
  • the positive electrode of the capacitor is connected, and the negative electrode of the lower capacitor is the negative electrode of the DC output bus 6013.
  • the first-level DC-to-DC sub-unit 6011 and the second-level DC-to-DC sub-unit include three nodes.
  • the six nodes shown in FIG. 6 are connected as follows: the first-level DC-to-DC sub-unit 6011 and the second-level The first node of the DC-to-DC sub-unit is connected to the positive output terminal of the photovoltaic array, the second node of the first-level DC-to-DC sub-unit 6011 is connected to the positive pole of the DC output bus 6013, and the second-level DC-to-DC sub-unit 6012 The second node is connected to the negative pole of the DC output bus 6013.
  • the third node of the first stage DC to DC sub-unit 6011 is connected to the negative output terminal of the photovoltaic array and the midpoint potential of the DC output bus 6013.
  • the second stage DC to DC The third node of the sub-unit 6012 is connected to the negative output terminal of the photovoltaic array and the midpoint potential of the DC output bus 6013, respectively.
  • the above six nodes can also be connected as follows: the first node of the first-level DC to DC sub-unit 6011 and the first node of the second-level DC to DC sub-unit are respectively connected to the photovoltaic array
  • the negative node of the first-stage DC to DC sub-unit 6011 is connected to the positive pole of the DC output bus 6013
  • the second node of the second-stage DC to DC sub-unit 6012 is connected to the negative pole of the DC output bus 6013.
  • the third node of the first-level DC to DC sub-unit 6011 is connected to the positive pole of the photovoltaic array and the midpoint potential of the DC output bus 6013.
  • the third node of the second-level DC to DC sub-unit 6012 is connected to the The positive output terminal is connected to the midpoint potential of the DC output bus 6013.
  • the disclosed systems, devices, and methods may be implemented in other ways.
  • the device embodiments described above are only schematic.
  • the division of the unit is only a logical function division.
  • multiple units or components may be combined or Can be integrated into another system, or some features can be ignored or not implemented.
  • the displayed or discussed mutual coupling or direct coupling or communication connection may be indirect coupling or communication connection through some interfaces, devices or units, which may be electrical, mechanical or other forms.
  • the units described as separate components may or may not be physically separated, and the components displayed as units may or may not be physical units, may be located in one place, or may be distributed on multiple network units. Some or all of the units may be selected according to actual needs to achieve the objective of the solution of this embodiment.
  • each functional unit in each embodiment of the present application may be integrated into one processing unit, or each of the units may exist separately physically, or two or more units may be integrated into one unit.
  • the above integrated unit may be implemented in the form of hardware or in the form of software functional unit.
  • the integrated unit When the integrated unit is implemented in the form of a software functional unit and sold or used as an independent product, it may be stored in a computer-readable storage medium.
  • the technical solution of the present application is essentially a part that contributes to the existing technology or all or part of the technical solution can be embodied in the form of a software product, which is stored in a storage medium. , Including a plurality of instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to perform all or part of the steps of the method described in the embodiments of the present application.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)
  • Photovoltaic Devices (AREA)
  • Supply And Distribution Of Alternating Current (AREA)
  • Charge And Discharge Circuits For Batteries Or The Like (AREA)

Abstract

一种光伏发电系统，可使得在同等功率转换条件下，提高光伏系统的电压，降低光伏发电系统的电流，从而节约能耗，降低光伏系统成本。其包括：光伏阵列（101），直流变换单元（102）、母线单元（103）和逆变单元（104）；其中，所述光伏阵列为一个或多个光伏阵列（101），光伏阵列（101）用于将太阳能转换为电能，即生成直流功率，并且输出直流电压，母线单元（103）用于将直流变换单元（102）输出的直流电能或者直接将光伏阵列（101）输出的直流电能进行存储以提高第一母线单元（103）的母线电压。在同等功率转换条件下，提高逆变单元（104）的输入电压，可以有效地降低光伏发电逆变系统中的直流母线电流以及逆变单元（104）逆变后的交流电流也会相应的降低，因此，降低光伏发电逆变系统中的电能损耗。

Description

一种光伏发电逆变系统
本申请要求于2018年9月21日提交中国专利局、申请号为201811109472.5、发明名称为“一种光伏发电逆变系统”，和，于2018年9月29日提交中国专利局、申请号为201811150106.4、发明名称为“一种光伏发电逆变系统”的两个中国专利申请的优先权，其全部内容通过引用结合在本申请中。
技术领域
本申请涉及光伏发电技术领域，尤其涉及一种光伏发电逆变系统。
背景技术
近年来，可再生能源收到了广泛地关注。在可再生能源中，相对于传统的化石能源发电而言，使用太阳能发电造成的环境污染较小。在光伏发电系统中，其光伏发电的性能、可靠性和管理技术等方面日趋成熟。
目前，光伏发电系统中的逆变器架构主要有以下三种：集中式、分布式和集散式。其中，集中式、分布式和集散式三种架构的光伏发电系统中的电流变大，导致光伏系统的能量损耗增加。
发明内容
本申请实施例提供了一种光伏发电系统，可使得在同等功率转换条件下，提高光伏系统的电压，降低光伏发电系统的电流，从而节约能耗，降低光伏系统成本。
为了达到以上技术目的，本申请实施例提供了以下技术方案：
第一方面，本申请实施例提供了一种光伏发电逆变系统，包括：光伏阵列、第一直流变换单元、第一母线单元和第一逆变单元，其中，所述光伏阵列为一个或多个光伏阵列，每个光伏阵列中包括一个或多个电池板，所述第一直流变换单元的数量为一个或多个；一个第一直流变换单元的输入端与一个或多个光伏阵列的输出端连接，所述第一母线单元与一个或多个第一直流变换单元的输出端连接，所述第一母线单元与所述第一逆变单元连接，并且，所述第一母线单元的直流电压大于电池板应用的最大系统电压；所述第一直流变换单元，用于将所述光伏阵列输出的直流电压进行直流功率转换；所述第一逆变单元，用于将所述第一母线单元的直流电压转换为交流电压。
结合第一方面，在第一方面的第一种可能的实现方式中，所述第一直流变换单元的正极输出端、中点电位和负极输出端分别与所述第一母线单元的正极、中点电位和负极一一对应耦合连接；或，所述第一直流变换单元的正极输出端和负极输出端分别与所述第一母线单元的正极和负极一一对应耦合连接。
结合第一方面，在第一方面的第二种可能的实现方式中，所述第一母线单元通过正极、中点电位和负极与所述第一逆变单元耦合连接；或，所述第一母线单元通过正极和负极与所述第一逆变单元耦合连接。
第二方面，本申请实施例提供了一种光伏发电逆变系统，包括：光伏阵列、第二直流变换单元、第二母线单元、第二逆变单元和第一变压器，其中，所述光伏阵列为一个或多个光伏阵列，所述第二直流变换单元的数量为一个或多个；一个第二直流变换单元的输入 端与一个或多个光伏阵列的输出端连接，所述第二母线单元与一个或多个第二直流变换单元的输出端连接，所述第二逆变单元的输入端与所述第二母线单元连接，所述第二逆变单元的输出端与所述第一变压器的副边连接，并且，所述第一变压器的副边的线电压为大于1000V的交流电压，所述第一变压器的原边与电网连接；所述第二直流变换单元，用于将所述光伏阵列输出的直流电压进行直流功率转换；所述第二逆变单元，用于将所述第二母线单元的直流电压转换为交流电压；所述第一变压器，用于将所述第二逆变单元输出的交流电压传输至所述电网中。
结合第二方面，在第二方面的第一种可能的实现方式中，所述第二直流变换单元的正极输出端、中点电位和负极输出端分别与所述第二母线单元的正极、中点电位和负极一一对应耦合连接；或，所述第二直流变换单元的正极输出端和负极输出端分别与所述第二母线单元的正极和负极一一对应耦合连接。
结合第二方面，在第二方面的第二种可能的实现方式中，所述第二母线单元通过正极、中点电位和负极与所述第二逆变单元耦合连接；或，所述第二母线单元通过正极和负极与所述第二逆变单元耦合连接。
第三方面，本申请实施例提供了一种光伏发电逆变系统，包括：光伏阵列、第三母线单元、第三逆变单元和第二变压器，其中，所述光伏阵列为一个或多个光伏阵列；所述第三母线单元与一个或多个光伏阵列连接，所述第三母线单元与所述第三逆变单元的输入端连接，所述第三逆变单元的输出端与所述第二变压器的副边连接，并且所述第二变压器的副边的线电压为大于1000V的交流电压，所述第二变压器的原边与电网连接；所述光伏阵列，用于生成直流功率；所述第三逆变单元，用于将所述第三母线单元的直流电压转换为交流电压；所述第二变压器，用于将所述第三逆变单元输出的交流电压传输至电网中。
结合第三方面，在第三方面的第一种可能的实现方式中，所述光伏阵列的正极输出端和负极输出端分别与所述第二母线单元的正极和负极一一对应耦合连接。
结合第三方面，在第三方面的第二种可能的实现方式中，所述第三母线单元通过正极、中点电位和负极与所述第三逆变单元耦合连接；或，所述第三母线单元通过正极和负极与所述第三逆变单元耦合连接。
第四方面，本申请实施例提供了一种光伏发电逆变系统，包括：光伏阵列、第三直流变换单元、第四母线单元和第七逆变单元，其中，所述光伏阵列为一个或多个光伏阵列，所述第三直流变换单元的数量为一个或多个；一个第三直流变换单元的输入端与一个或多个光伏阵列的输出端连接，所述第四母线单元与一个或多个直流变换单元的输出端连接，所述第七逆变单元与所述第四母线单元连接，并且，所述第四母线单元上的直流电压大于1000V；所述第三直流变换单元，用于将所述光伏阵列输出的直流电压进行直流功率转换；所述第七逆变单元，用于将所述第四母线单元的直流电压转化为交流电压。
结合第四方面，在第四方面的第一种可能的实现方式中，所述第三直流变换单元的正极输出端、中点电位和负极输出端分别与所述第四母线单元的正极、中点电位和负极一一对应耦合连接；或，所述第三直流变换单元的正极输出端和负极输出端分别与所述第四母线单元的正极和负极一一对应耦合连接。
结合第四方面，在第四方面的第二种可能的实现方式中，所述第四母线单元通过正极、中点电位和负极与所述第七逆变单元耦合连接；或，所述第四母线单元通过正极和负极与所述第七逆变单元耦合连接。
第五方面，本申请实施例提供了一种光伏发电逆变系统，包括：光伏阵列、第四直流变换单元、第五母线单元和第五逆变单元，其中，所述光伏阵列为一个或多个光伏阵列，所述第四直流变换单元的数量为一个或多个；一个第四直流变换单元的输入端与一个或多个光伏阵列的输出端连接，所述第五母线单元与一个或多个直流变换单元的输出端连接，所述第五逆变单元与所述第五母线单元连接，并且，所述第五母线单元上的直流电压大于1500V；所述第四直流变换单元，用于将所述光伏阵列输出的直流电压进行直流功率转换；所述第五逆变单元，用于将所述第五母线单元的直流电压转化为交流电压。
结合第五方面，在第五方面的第一种可能的实现方式中，所述第四直流变换单元的正极输出端、中点电位和负极输出端分别与所述第五母线单元的正极、中点电位和负极一一对应耦合连接；或，所述第四直流变换单元的正极输出端和负极输出端分别与所述第五母线单元的正极和负极一一对应耦合连接。
结合第五方面，在第五方面的第二种可能的实现方式中，所述第五母线单元通过正极、中点电位和负极与所述第五逆变单元耦合连接；或，所述第五母线单元通过正极和负极与所述第五逆变单元耦合连接。
从以上技术方案中可以看出，光伏阵列用于将太阳能转换为电能，即生成直流功率，并且输出直流电压，母线单元用于将直流变换单元输出的直流电能或者直接将光伏阵列输出的直流电能进行存储以提高第一母线单元的正极和负极之间的母线电压，该母线电压为直流电压，逆变单元将母线单元上的母线电压转换为交流电压，以向电网输送能量。从以上技术方案中可以知道，由于线单元中的母线电压被提高即逆变单元的输入电压提高，从而，在同等功率转换条件下，提高逆变单元的输入电压，可以有效地降低光伏发电逆变系统中的直流母线电流以及逆变单元逆变后的交流电流也会相应的降低，因此，降低光伏发电逆变系统中的电能损耗。
进一步，由于直流母线电流的减小，可选用低压小线径线缆，降低直流线缆成本和损耗，以及，由于逆变器输出的交流电流的减小，降低交流线缆成本和损耗，从而节约光伏发电逆变系统的成本。
附图说明
为了更清楚地说明本申请实施例的技术方案，下面将对实施例描述所需要使用的附图作简单地介绍，显而易见地，下面描述中的附图仅仅是本申请的一些实施例，对于本领域普通技术人员来讲，在不付出创造性劳动的前提下，还可以根据这些附图获得其他的附图。
图1为本申请实施例提供的光伏发电逆变系统的一个实施例示意图；
图2为本申请实施例提供的光伏发电逆变系统的另一个实施例示意图；
图3为本申请实施例提供的光伏发电逆变系统的另一个实施例示意图；
图4为本申请实施例提供的光伏发电逆变系统的另一个实施例示意图；
图5为本申请实施例提供的光伏发电逆变系统的另一个实施例示意图；
图6为本申请实施例提供的直流变换单元的一个实施例示意图。
具体实施方式
本申请实施例提供了一种光伏发电逆变系统，用于在同等功率转换条件下，提高逆变器的输入电压和并网电压，降低光伏发电逆变系统中的能量损耗。
本申请中出现的术语“和/或”，可以是一种描述关联对象的关联关系，表示可以存在三种关系，例如，A和/或B，可以表示：单独存在A，同时存在A和B，单独存在B这三种情况。另外，本申请中字符“/”，一般表示前后关联对象是一种“或”的关系。
本申请的说明书和权利要求书及上述附图中的术语“第一”、“第二”等是用于区别类似的对象，而不必用于描述特定的顺序或先后次序。应该理解这样使用的数据在适当情况下可以互换，以便这里描述的实施例能够以除了在这里图示或描述的内容以外的顺序实施。此外，术语“包括”和“具有”以及他们的任何变形，意图在于覆盖不排他的包含，例如，包含了一系列步骤或模块的过程、方法、系统、产品或设备不必限于清楚地列出的那些步骤或模块，而是可包括没有清楚地列出的或对于这些过程、方法、产品或设备固有的其它步骤或模块。在本申请中出现的对步骤进行的命名或者编号，并不意味着必须按照命名或者编号所指示的时间/逻辑先后顺序执行方法流程中的步骤，已经命名或者编号的流程步骤可以根据要实现的技术目的变更执行次序，只要能达到相同或者相类似的技术效果即可。本申请中所出现的模块的划分，是一种逻辑上的划分，实际应用中实现时可以有另外的划分方式，例如多个模块可以结合成或集成在另一个系统中，或一些特征可以忽略，或不执行，另外，所显示的或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，模块之间的间接耦合或通信连接可以是电性或其他类似的形式，本申请中均不作限定。并且，作为分离部件说明的模块或子模块可以是也可以不是物理上的分离，可以是也可以不是物理模块，或者可以分布到多个电路模块中，可以根据实际的需要选择其中的部分或全部模块来实现本申请方案的目的。
本申请实施例适用于光伏发电，将太阳能通过光伏板转换化电能，并且将电能并入到电网中。由于光伏板转换得到的电能是直流电，而电网中是以交流电形式进行传输的，因此，在光伏板将太阳能转换为直流电之后，需要将直流电逆变为三相交流电才能通过升压变压器并入电网中，本申请实施例中提供的光伏发电逆变系统正是用于将光伏板输出的直流电转换为交流电，以向电网传输能量。
本申请实施例提供的光伏发电逆变系统，可以在同等功率转换条件下，提高逆变单元的输入电压，可以有效地降低光伏发电逆变系统中的直流母线电流以及逆变单元逆变后的交流电流也会相应的降低，因此，降低光伏发电逆变系统中的电能损耗。
为了便于理解本申请实施例中的技术方案，下面结合具体的实施例从以下几个方面对本申请实施例中提供的光伏发电逆变系统进行详细说明。
图1为本申请实施例提供的光伏发电逆变系统的一个实施例示意图。
第一方面，如图1所示，光伏发电逆变系统，包括：光伏阵列101、第一直流变换单元102、第一母线单元103和第一逆变单元104，其中，光伏阵列101为一个或多个光伏阵 列，每个光伏阵列中包括一个或多个电池板。
其中，第一直流变换单元102的正极输入端与光伏阵列101的正极输出端连接，第一直流变换单元102的负极输出端与光伏阵列101的负极输出端连接，第一直流变换单元102的正极输出端与第一母线单元103的正极连接，第一直流变换单元102的负极输出端与第一母线单元103的负极连接，并且，第一母线单元103正极和负极之间的母线电压大于光伏阵列中电池板应用的最大系统电压，第一母线单元103与第一逆变单元104连接。
当光伏发电逆变系统正常工作时，光伏阵列101生成直流功率，第一直流变换单元102将光伏阵列101生成的直流功率进行直流功率转换后输入到第一母线单元103中进行存储，第一逆变单元104将第一母线单元103正负极之间存储的直流电转换为交流电，以向电网输送能量。
需要说明的是，直流变换单元可以是一个或者多个，当存在多个直流变换单元时，一个直流变换单元可以与对应的一个或者多个光伏阵列连接。母线单元也可以是一个或者多个，当存在多个母线单元时，一个母线单元可以与对应的一个或者多个直流变换单元连接。
在第一方面的一种实施例方式中，第一直流变换单元102的正极输出端、中点电位和负极输出端分别与第一母线单元103的正极、中点电位和负极一一对应耦合连接，其中，第一直流变换单元102的中点电位与第一母线单元103的中点电位的耦合连接如图1中第一直流变换单元102和第一母线单元103之间的虚线部分所示。
在第一方面的一种实施例方式中，第一直流变换单元102的正极输出端和负极输出端分别与第一母线单元103的正极和负极一一对应耦合连接。
在第一方面的一种实施例方式中，第一母线单元103通过正极、中点电位和负极与第一逆变单元104耦合连接，其中，第一母线单元103的中点电位与第一逆变单元104的中点电位的耦合连接如图1中第一母线单元103与第一逆变单元104之间的虚线部分所示。
在第一方面的一种实施例方式中，第一母线单元通过正极和负极与第一逆变单元耦合连接。
图2为本申请实施例提供的光伏发电逆变系统的另一个实施例示意图。
第二方面，光伏发电逆变系统，包括：光伏阵列201、第二直流变换单元202、第二母线单元203、第二逆变单元204和第一变压器205，其中，光伏阵列为一个或多个光伏阵列。
其中，第二直流变换单元202的正极输入端与光伏阵列201的正极输出端连接，第二直流变换单元的负极输入端与光伏阵列201的负极输出端连接，第二直流变换单元202的正极输出端与第二母线单元203的正极连接，第二直流变换单元202的负极输出端与第二母线单元203的负极连接，第二母线单元203的正负极与第二逆变单元204的输入端连接，第二逆变单元204的输出端与第一变压器205的副边相连接，第一变压器205的原边与电网206连接。
当光伏发电逆变系统正常工作时，光伏阵列201生成直流功率，第二直流变换单元202将光伏阵列201生成的直流功率进行直流功率转换后输入到第二母线单元203中进行存储，第二逆变单元204将第二母线单元203正负极之间存储的直流电转换为交流电，第一变压 器205将第二逆变单元204输出的交流电压输出电网206中，其中，光伏发电逆变系统正常工作时，第一变压器205的副边的线电压为大于1000V的交流电压。
同样，需要说明的是，直流变换单元可以是一个或者多个，当存在多个直流变换单元时，一个直流变换单元可以与对应的一个或者多个光伏阵列连接。母线单元也可以是一个或者多个，当存在多个母线单元时，一个母线单元可以与对应的一个或者多个直流变换单元连接。
在第二方面的一种实施例方式中，第二直流变换单元202的正极输出端、中点电位和负极输出端分别与第二母线单元203的正极、中点电位和负极一一对应耦合连接，其中，第二直流变换单元202的中点电位与第二母线单元203的中点电位之间的耦合连接如图2中第二直流变换单元202和第二母线单元203之间的虚线部分所示。
在第二方面的一种实施例方式中，第二直流变换单元202的正极输出端和负极输出端分别与第二母线单元203的正极和负极一一对应耦合连接。
在第二方面的一种实施例方式中，第二母线单元203通过正极、中点电位和负极与第二逆变单元204耦合连接，第二母线单元203的中点电位与第二逆变单元204耦合连接如图2中第二母线单元203和第二逆变单元204之间的虚线部分所示。
在第二方面的一种实施例方式中，第二母线单元203通过正极和负极与第二逆变单元204耦合连接。
图3为本申请实施例提供的光伏发电逆变系统的另一个实施例示意图。
第三方面，如图3所示，光伏发电逆变系统，包括：光伏阵列301、第三母线单元302、第三逆变单元303和第二变压器304，其中，光伏阵列为一个或多个光伏阵列。
其中，光伏阵列301的正极和负极分别与第三母线单元302的正极和负极对应连接，第三母线单元302与第三逆变单元303的输入端连接，第三逆变单元303的输出端与第二变压器304的副边连接，第二变压器304的原边与电网305连接。
当光伏发电逆变系统正常工作时，光伏阵列301生成直流功率，第三母线单元302对光伏阵列301生成的直流功率进行存储，第三逆变单元303将第三母线单元302正负极之间存储的直流电转换为交流电，第二变压器304将第三逆变单元303输出的交流电压输出电网305中，其中，光伏发电逆变系统正常工作时，第二变压器304的副边的线电压为大于1000V的交流电压。
同样，需要说明的是，直流变换单元可以是一个或者多个，当存在多个直流变换单元时，一个直流变换单元可以与对应的一个或者多个光伏阵列连接。母线单元也可以是一个或者多个，当存在多个母线单元时，一个母线单元可以与对应的一个或者多个直流变换单元连接。
在第三方面的一种实施例方式中，光伏阵列301的正极输出端和负极输出端分别与第二母线单元302的正极和负极一一对应耦合连接。
在第三方面的一种实施例方式中，第三母线单元302通过正极、中点电位和负极与第三逆变单元303耦合连接，其中，第三母线单元302的中点电位与第三逆变单元303的中 点电位之间的耦合连接如图3中第三母线单元302和第三逆变单元303之间的虚线部分所示。
在第三方面的一种实施例方式中，第三母线单元302通过正极和负极与第三逆变单元303耦合连接。
图4为本申请实施例提供的光伏发电逆变系统的另一个实施例示意图。
第四方面，如图4所示，光伏发电逆变系统，包括：光伏阵列401、第三直流变换单元402、第四母线单元403和第四逆变单元404，其中，光伏阵列为一个或多个光伏阵列。
其中，第三直流变换单元402的正极输入端与光伏阵列401的正极输出端连接，第三直流变换单元402的负极输出端与光伏阵列401的负极输出端连接，第三直流变换单元402的正极输出端与第四母线单元403的正极连接，第三直流变换单元402的负极输出端与第四母线单元403的负极连接，并且，第四母线单元403正极和负极之间的母线电压大于1000V，第四母线单元403与第四逆变单元404连接。
当光伏发电逆变系统正常工作时，光伏阵列401生成直流功率，第三直流变换单元402将光伏阵列401生成的直流功率进行直流功率转换后输入到第四母线单元403中进行存储，第四逆变单元404将第四母线单元403正负极之间存储的直流电转换为交流电，以向电网输入能量。
同样，需要说明的是，直流变换单元可以是一个或者多个，当存在多个直流变换单元时，一个直流变换单元可以与对应的一个或者多个光伏阵列连接。母线单元也可以是一个或者多个，当存在多个母线单元时，一个母线单元可以与对应的一个或者多个直流变换单元连接。
在第四方面的一种实施例方式中，第三直流变换单元402的正极输出端、中点电位和负极输出端分别与第四母线单元403的正极、中点电位和负极一一对应耦合连接，其中，第三直流变换单元402的中点电位与第四母线单元403的中点电位的耦合连接如图4中第三直流变换单元402和第四母线单元403之间的虚线部分所示。
在第四方面的一种实施例方式中，第三直流变换单元402的正极输出端和负极输出端分别与第四母线单元403的正极和负极一一对应耦合连接。
在第四方面的一种实施例方式中，第四母线单元403通过正极、中点电位和负极与第四逆变单元404耦合连接，其中，第四母线单元403的中点电位与第四逆变单元404耦合连接如图4中第四母线单元403和第四逆变单元404之间的虚线部分所示。
在第四方面的一种实施例方式中，第四母线单元403通过正极和负极与第四逆变单元404耦合连接。
图5为本申请实施例提供的光伏发电逆变系统的另一个实施例示意图。
第五方面，如图5所示，光伏发电逆变系统，包括：光伏阵列501、第四直流变换单元502、第五母线单元503和第五逆变单元504，其中，光伏阵列为一个或多个光伏阵列。
其中，第四直流变换单元502的正极输入端与光伏阵列501的正极输出端连接，第四 直流变换单元502的负极输出端与光伏阵列501的负极输出端连接，第四直流变换单元502的正极输出端与第五母线单元503的正极连接，第四直流变换单元502的负极输出端与第五母线单元503的负极连接，并且，第五母线单元503正极和负极之间的母线电压大于1500V，第五母线单元503与第五逆变单元504连接。
当光伏发电逆变系统正常工作时，光伏阵列501生成直流功率，第四直流变换单元502将光伏阵列501生成的直流功率进行直流功率转换后输入到第五母线单元503中进行存储，第五逆变单元504将第五母线单元503正负极之间存储的直流电转换为交流电，以向电网输入能量。
同样，需要说明的是，直流变换单元可以是一个或者多个，当存在多个直流变换单元时，一个直流变换单元可以与对应的一个或者多个光伏阵列连接。母线单元也可以是一个或者多个，当存在多个母线单元时，一个母线单元可以与对应的一个或者多个直流变换单元连接。
在第五方面的一种实施例方式中，第四直流变换单元502的正极输出端、中点电位和负极输出端分别与第五母线单元503的正极、中点电位和负极一一对应耦合连接，其中，第四直流变换单元502的中点电位与第五母线单元503的中点电位的耦合连接如图5中虚线部分所示。
在第五方面的一种实施例方式中，第四直流变换单元502的正极输出端和负极输出端分别与第五母线单元503的正极和负极一一对应耦合连接。
在第五方面的一种实施例方式中，第五母线单元503通过正极、中点电位和负极与第五逆变单元504耦合连接，其中，第五母线单元的中点电位与第五逆变单元504的连接如图5中虚线部分所示。
在第五方面的一种实施例方式中，第五母线单元503通过正极和负极与第五逆变单元504耦合连接。
图6为本申请实施例提供的直流变换单元的一个实施例示意图。
上述图1、图2、图4和图5中任一项中所述的直流变换单元均可以包括但不限于图6中所示的直流变换单元。
如图6所示，直流变换单元601包括第一级DC转DC子单元6011、第二级DC转DC子单元6012和直流输出母线6013。直流输出母线6013的结构与母线单元类似，直流输出母线6013也是由上下两个电容构成构成直流输出母线6013的中点电位，上电容的正极为直流输出母线6013的正极，上电容的负极与下电容的正极连接，下电容的负极为直流输出母线6013的负极。
第一级DC转DC子单元6011和第二级DC转DC子单元包括三个节点，图6中示出的六个节点的连接方式为：第一级DC转DC子单元6011和第二级DC转DC子单元的第一节点与光伏阵列的正极输出端连接，第一级DC转DC子单元6011的第二节点与直流输出母线6013的正极连接，第二级DC转DC子单元6012的第二节点与直流输出母线6013的负极连接，第一级DC转DC子单元6011的第三节点分别与光伏阵列的负极输出端和直流输出母线6013 的中点电位连接，第二级DC转DC子单元6012的第三节点分别与光伏阵列的负极输出端和直流输出母线6013的中点电位连接。
此外，除上述图6中连接方式以外，上述六个节点还可以连接如下：第一级DC转DC子单元6011的第一节点和第二级DC转DC子单元的第一节点分别与光伏阵列的负极输出端连接，第一级DC转DC子单元6011的第二节点与直流输出母线6013的正极连接，第二级DC转DC子单元6012的第二节点与直流输出母线6013的负极连接，第一级DC转DC子单元6011的第三节点分别与光伏阵列的正极输出端和直流输出母线6013的中点电位连接，第二级DC转DC子单元6012的第三节点分别与光伏阵列的正极输出端和直流输出母线6013的中点电位连接。
所属领域的技术人员可以清楚地了解到，为描述的方便和简洁，上述描述的系统，装置和单元的具体工作过程，可以参考前述方法实施例中的对应过程，在此不再赘述。
在本申请所提供的几个实施例中，应该理解到，所揭露的系统，装置和方法，可以通过其它的方式实现。例如，以上所描述的装置实施例仅仅是示意性的，例如，所述单元的划分，仅仅为一种逻辑功能划分，实际实现时可以有另外的划分方式，例如多个单元或组件可以结合或者可以集成到另一个系统，或一些特征可以忽略，或不执行。另一点，所显示或讨论的相互之间的耦合或直接耦合或通信连接可以是通过一些接口，装置或单元的间接耦合或通信连接，可以是电性，机械或其它的形式。
所述作为分离部件说明的单元可以是或者也可以不是物理上分开的，作为单元显示的部件可以是或者也可以不是物理单元，即可以位于一个地方，或者也可以分布到多个网络单元上。可以根据实际的需要选择其中的部分或者全部单元来实现本实施例方案的目的。
另外，在本申请各个实施例中的各功能单元可以集成在一个处理单元中，也可以是各个单元单独物理存在，也可以两个或两个以上单元集成在一个单元中。上述集成的单元既可以采用硬件的形式实现，也可以采用软件功能单元的形式实现。
所述集成的单元如果以软件功能单元的形式实现并作为独立的产品销售或使用时，可以存储在一个计算机可读取存储介质中。基于这样的理解，本申请的技术方案本质上或者说对现有技术做出贡献的部分或者该技术方案的全部或部分可以以软件产品的形式体现出来，该计算机软件产品存储在一个存储介质中，包括若干指令用以使得一台计算机设备(可以是个人计算机，服务器，或者网络设备等)执行本申请各个实施例所述方法的全部或部分步骤。
以上所述，以上实施例仅用以说明本申请的技术方案，而非对其限制；尽管参照前述实施例对本申请进行了详细的说明，本领域的普通技术人员应当理解：其依然可以对前述各实施例所记载的技术方案进行修改，或者对其中部分技术特征进行等同替换；而这些修改或者替换，并不使相应技术方案的本质脱离本申请各实施例技术方案范围。

Claims (13)

  1. 一种光伏发电逆变系统，其特征在于，包括：
    光伏阵列、第一直流变换单元、第一母线单元和第一逆变单元，其中，所述光伏阵列为一个或多个光伏阵列，每个光伏阵列中包括一个或多个电池板，所述第一直流变换单元的数量为一个或多个；
    一个第一直流变换单元的输入端与一个或多个光伏阵列的输出端连接，所述第一母线单元与一个或多个第一直流变换单元的输出端连接，所述第一母线单元与所述第一逆变单元连接，并且，所述第一母线单元的直流电压大于电池板应用的最大系统电压；
    所述第一直流变换单元，用于将所述光伏阵列输出的直流电压进行直流功率转换；
    所述第一逆变单元，用于将所述第一母线单元的直流电压转换为交流电压。
  2. 根据权利要求1所述的系统，其特征在于，所述第一直流变换单元的正极输出端、中点电位和负极输出端分别与所述第一母线单元的正极、中点电位和负极一一对应耦合连接；或，所述第一直流变换单元的正极输出端和负极输出端分别与所述第一母线单元的正极和负极一一对应耦合连接。
  3. 根据权利要求1所述的系统，其特征在于，所述第一母线单元通过正极、中点电位和负极与所述第一逆变单元耦合连接；或，所述第一母线单元通过正极和负极与所述第一逆变单元耦合连接。
  4. 一种光伏发电逆变系统，其特征在于，包括：
    光伏阵列、第二直流变换单元、第二母线单元、第二逆变单元和第一变压器，其中，所述光伏阵列为一个或多个光伏阵列，所述第二直流变换单元的数量为一个或多个；
    一个第二直流变换单元的输入端与一个或多个光伏阵列的输出端连接，所述第二母线单元与一个或多个第二直流变换单元的输出端连接，所述第二逆变单元的输入端与所述第二母线单元连接，所述第二逆变单元的输出端与所述第一变压器的副边连接，并且，所述第一变压器的副边的线电压为大于1000V的交流电压，所述第一变压器的原边与电网连接；
    所述第二直流变换单元，用于将所述光伏阵列输出的直流电压进行直流功率转换；
    所述第二逆变单元，用于将所述第二母线单元的直流电压转换为交流电压；
    所述第一变压器，用于将所述第二逆变单元输出的交流电压传输至所述电网中。
  5. 根据权利要求4所述的系统，其特征在于，所述第二直流变换单元的正极输出端、中点电位和负极输出端分别与所述第二母线单元的正极、中点电位和负极一一对应耦合连接；或，所述第二直流变换单元的正极输出端和负极输出端分别与所述第二母线单元的正极和负极一一对应耦合连接。
  6. 根据权利要求4所述的系统，其特征在于，所述第二母线单元通过正极、中点电位和负极与所述第二逆变单元耦合连接；或，所述第二母线单元通过正极和负极与所述第二逆变单元耦合连接。
  7. 一种光伏发电逆变系统，其特征在于，包括：
    光伏阵列、第三母线单元、第三逆变单元和第二变压器，其中，所述光伏阵列为一个或多个光伏阵列；
    所述第三母线单元与一个或多个光伏阵列连接，所述第三母线单元与所述第三逆变单元的输入端连接，所述第三逆变单元的输出端与所述第二变压器的副边连接，并且所述第二变压器的副边的线电压为大于1000V的交流电压，所述第二变压器的原边与电网连接；
    所述光伏阵列，用于生成直流功率；
    所述第三逆变单元，用于将所述第三母线单元的直流电压转换为交流电压；
    所述第二变压器，用于将所述第三逆变单元输出的交流电压传输至电网中。
  8. 根据权利要求7所述的系统，其特征在于，所述光伏阵列的正极输出端和负极输出端分别与所述第二母线单元的正极和负极一一对应耦合连接。
  9. 根据权利要求7所述的系统，其特征在于，所述第三母线单元通过正极、中点电位和负极与所述第三逆变单元耦合连接；或，所述第三母线单元通过正极和负极与所述第三逆变单元耦合连接。
  10. 一种光伏发电逆变系统，其特征在于，包括：
    光伏阵列、第三直流变换单元、第四母线单元和第四逆变单元，其中，所述光伏阵列为一个或多个光伏阵列，所述第三直流变换单元的数量为一个或多个；
    一个第三直流变换单元的输入端与一个或多个光伏阵列的输出端连接，所述第四母线单元与一个或多个直流变换单元的输出端连接，所述第四逆变单元与所述第四母线单元连接，并且，所述第四母线单元上的直流电压大于1000V；
    所述第三直流变换单元，用于将所述光伏阵列输出的直流电压进行直流功率转换；
    所述第四逆变单元，用于将所述第四母线单元的直流电压转化为交流电压。
  11. 根据权利要求10所述的系统，其特征在于，所述第四母线单元上的直流电压大于1500V。
  12. 根据权利要求10或11所述的系统，其特征在于，所述第三直流变换单元的正极输出端、中点电位和负极输出端分别与所述第四母线单元的正极、中点电位和负极一一对应耦合连接；或，所述第三直流变换单元的正极输出端和负极输出端分别与所述第四母线单元的正极和负极一一对应耦合连接。
  13. 根据权利要求10或11所述的系统，其特征在于，所述第四母线单元通过正极、中点电位和负极与所述第七逆变单元耦合连接；或，所述第四母线单元通过正极和负极与所述第七逆变单元耦合连接。
PCT/CN2019/106971 2018-09-21 2019-09-20 一种光伏发电逆变系统 WO2020057635A1 (zh)

Priority Applications (3)

Application Number Priority Date Filing Date Title
EP19862695.4A EP3771065B1 (en) 2018-09-21 2019-09-20 Photovoltaic power generation inverter system
AU2019343425A AU2019343425B2 (en) 2018-09-21 2019-09-20 Photovoltaic power generation inverter system
US17/113,453 US11217999B2 (en) 2018-09-21 2020-12-07 Photovoltaic power generation inverter system

Applications Claiming Priority (4)

Application Number Priority Date Filing Date Title
CN201811109472 2018-09-21
CN201811109472.5 2018-09-21
CN201811150106.4 2018-09-29
CN201811150106.4A CN109167390B (zh) 2018-09-21 2018-09-29 一种光伏发电逆变系统

Related Child Applications (1)

Application Number Title Priority Date Filing Date
US17/113,453 Continuation US11217999B2 (en) 2018-09-21 2020-12-07 Photovoltaic power generation inverter system

Publications (1)

Publication Number Publication Date
WO2020057635A1 true WO2020057635A1 (zh) 2020-03-26

Family

ID=64893027

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2019/106971 WO2020057635A1 (zh) 2018-09-21 2019-09-20 一种光伏发电逆变系统

Country Status (5)

Country Link
US (1) US11217999B2 (zh)
EP (1) EP3771065B1 (zh)
CN (1) CN109167390B (zh)
AU (1) AU2019343425B2 (zh)
WO (1) WO2020057635A1 (zh)

Families Citing this family (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN109167390B (zh) * 2018-09-21 2021-11-26 华为数字能源技术有限公司 一种光伏发电逆变系统
WO2021208044A1 (zh) * 2020-04-16 2021-10-21 华为技术有限公司 一种电源系统
WO2021208045A1 (zh) 2020-04-16 2021-10-21 华为技术有限公司 一种电源系统
CN114223127B (zh) * 2020-07-07 2024-04-09 华为数字能源技术有限公司 一种电源系统
WO2022126601A1 (zh) * 2020-12-18 2022-06-23 华为数字能源技术有限公司 一种光伏系统及电源系统
CN112953285B (zh) * 2021-02-20 2024-05-14 阳光电源股份有限公司 一种串联型逆变系统及其保护方法
CN117157864A (zh) * 2021-04-19 2023-12-01 华为数字能源技术有限公司 一种直流汇流箱、光伏发电系统以及故障检测方法
CN113271009A (zh) * 2021-06-28 2021-08-17 阳光电源股份有限公司 一种dc/dc变换单元和能量变换系统
US11824358B2 (en) * 2022-03-30 2023-11-21 741 Solutions LLC Transformer economizer

Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101779291A (zh) * 2007-08-03 2010-07-14 先进能源工业公司 用于耦合光伏阵列的系统、方法和装置
US20130200715A1 (en) * 2012-02-03 2013-08-08 Abb Research Ltd Converter assembly and a power plant including the converter assembly
CN103368200A (zh) * 2013-06-25 2013-10-23 南车株洲电力机车研究所有限公司 一种单端vsc—hvdc光伏发电系统
CN104113280A (zh) * 2014-07-05 2014-10-22 北京科诺伟业科技股份有限公司 串联式光伏方阵
CN105743432A (zh) * 2015-11-19 2016-07-06 中民新能投资有限公司 一种光伏发电系统及其控制方法
CN109167390A (zh) * 2018-09-21 2019-01-08 华为技术有限公司 一种光伏发电逆变系统

Family Cites Families (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102624022A (zh) * 2011-01-30 2012-08-01 上海康威特吉能源技术有限公司 一种光伏并网发电系统及其直流母线电压控制方法
CN104167918B (zh) * 2014-06-30 2017-06-13 阳光电源股份有限公司 一种高变压比的直流‑直流变换器
CN104124703A (zh) * 2014-07-01 2014-10-29 特变电工新疆新能源股份有限公司 一种高压直挂式光伏并网逆变器系统
CN105703389B (zh) * 2014-08-25 2019-06-25 特变电工新疆新能源股份有限公司 一种基于中高压直流接入的光伏并网发电系统
JP6579117B2 (ja) * 2017-01-06 2019-09-25 株式会社村田製作所 パワーコンディショナ
CN206517369U (zh) * 2017-01-23 2017-09-22 特变电工西安电气科技有限公司 一种光伏系统正负母线电压抬升电路
CN206892800U (zh) * 2017-06-09 2018-01-16 中国长城科技集团股份有限公司 一种漏电保护电路及计算机电源

Patent Citations (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN101779291A (zh) * 2007-08-03 2010-07-14 先进能源工业公司 用于耦合光伏阵列的系统、方法和装置
US20130200715A1 (en) * 2012-02-03 2013-08-08 Abb Research Ltd Converter assembly and a power plant including the converter assembly
CN103368200A (zh) * 2013-06-25 2013-10-23 南车株洲电力机车研究所有限公司 一种单端vsc—hvdc光伏发电系统
CN104113280A (zh) * 2014-07-05 2014-10-22 北京科诺伟业科技股份有限公司 串联式光伏方阵
CN105743432A (zh) * 2015-11-19 2016-07-06 中民新能投资有限公司 一种光伏发电系统及其控制方法
CN109167390A (zh) * 2018-09-21 2019-01-08 华为技术有限公司 一种光伏发电逆变系统

Also Published As

Publication number Publication date
CN109167390A (zh) 2019-01-08
US11217999B2 (en) 2022-01-04
US20210091571A1 (en) 2021-03-25
EP3771065A4 (en) 2021-03-03
AU2019343425A1 (en) 2021-04-29
CN109167390B (zh) 2021-11-26
EP3771065A1 (en) 2021-01-27
AU2019343425B2 (en) 2023-08-24
EP3771065B1 (en) 2024-05-22

Similar Documents

Publication Publication Date Title
WO2020057635A1 (zh) 一种光伏发电逆变系统
US20180233919A1 (en) Photovoltaic inverter system and operation method thereof
US20070047277A1 (en) Transformerless power conversion circuit for grid-connected power generation systems
CN202019314U (zh) 太阳能光伏三相微逆变器以及太阳能光伏发电系统
JP6172768B2 (ja) 双方向ｄｃ／ｄｃコンバータ及び系統連系インバータシステム
WO2018171767A1 (zh) 五电平低共模漏电流单相光伏并网逆变器及光伏并网系统
CN112217408A (zh) 一种级联式多端口变换器及三相中压输入系统
CN108768176B (zh) 一种三电平Boost电路和逆变系统
CN114362335A (zh) 应用于固态变压器的电源转换架构及相应的充电系统
CN105652116B (zh) 一种基于dc/dc变换器的背靠背试验电路
CN113271009A (zh) 一种dc/dc变换单元和能量变换系统
CN111478616A (zh) 一种地铁牵引供电系统及双向变流装置
EP3930135B1 (en) Power supply system
WO2021208141A1 (zh) 一种电源系统
CN106208131A (zh) 用于新能源接入和主动配电网的多电平变流器拓扑结构
CN113162414B (zh) 用于电能变换器的基本单元、电能变换器及通用功率接口
WO2021103781A1 (zh) 一种光伏系统
CN110535172B (zh) 一种交直流风光混合发电系统及功率平滑控制方法
CN210744761U (zh) 一种建筑用并网型太阳能光伏发电系统
CN102969919A (zh) 直流到交流的电力转换装置
CN107134938B (zh) 一种可以实现电容均压的单相三电平半桥逆变器
CN107257206B (zh) 一种三端直流变压器
CN205945092U (zh) 一种基于混合多电平变换器的分布式电源并网电路
CN202652100U (zh) 一种二极管钳位式逆变桥结构
CN109217657A (zh) 一种新型高增益直流升压变换器

Legal Events

Date Code Title Description
121 Ep: the epo has been informed by wipo that ep was designated in this application

Ref document number: 19862695

Country of ref document: EP

Kind code of ref document: A1

ENP Entry into the national phase

Ref document number: 2019862695

Country of ref document: EP

Effective date: 20201022

NENP Non-entry into the national phase

Ref country code: DE

WWE Wipo information: entry into national phase

Ref document number: 2019343425

Country of ref document: AU

ENP Entry into the national phase

Ref document number: 2019343425

Country of ref document: AU

Date of ref document: 20190920

Kind code of ref document: A