WO2023155463A1 - Système d'alimentation en énergie photovoltaïque - Google Patents

Système d'alimentation en énergie photovoltaïque Download PDF

Info

Publication number
WO2023155463A1
WO2023155463A1 PCT/CN2022/126646 CN2022126646W WO2023155463A1 WO 2023155463 A1 WO2023155463 A1 WO 2023155463A1 CN 2022126646 W CN2022126646 W CN 2022126646W WO 2023155463 A1 WO2023155463 A1 WO 2023155463A1
Authority
WO
WIPO (PCT)
Prior art keywords
photovoltaic
power supply
photovoltaic power
supply system
photovoltaic array
Prior art date
Application number
PCT/CN2022/126646
Other languages
English (en)
Chinese (zh)
Inventor
张毅
张彦忠
姚科奇
林松枝
Original Assignee
华为数字能源技术有限公司
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 华为数字能源技术有限公司 filed Critical 华为数字能源技术有限公司
Publication of WO2023155463A1 publication Critical patent/WO2023155463A1/fr

Links

Images

Classifications

    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00—Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381—Dispersed generators
    • H—ELECTRICITY
    • H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • 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
    • 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
    • H02S40/34—Electrical components comprising specially adapted electrical connection means to be structurally associated with the PV module, e.g. junction boxes
    • 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
    • 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

Definitions

  • the present application relates to the technical field of power electronics, in particular to a photovoltaic power supply system.
  • the photovoltaic power supply equipment for example, photovoltaic array
  • the photovoltaic power supply equipment in the photovoltaic power supply system is usually integrated and installed in a fixed position (for example, the The photovoltaic array is arranged in the glass of the building) to convert the received light energy or solar energy into electrical energy through photovoltaic power supply equipment to supply power to the load. Since the power supply of the photovoltaic power supply equipment is related to the area of the photovoltaic power supply equipment that can receive light energy or solar energy (for example, it is related to the area of the power generation device in the photovoltaic power supply equipment).
  • photovoltaic power supply equipment for example, a photovoltaic array
  • photovoltaic power generation equipment is usually composed of multiple photovoltaic power generation units connected, for example, multiple photovoltaic power generation units are connected in parallel, and the output (for example, output current) after parallel connection is used as the output of the photovoltaic array as a load powered by.
  • the output for example, output current
  • the short-circuit current of other photovoltaic power generation units in the photovoltaic power generation unit is usually far beyond the maximum operating current that a single photovoltaic power generation unit can withstand, which can easily cause damage to photovoltaic power supply equipment, and the safety of photovoltaic power supply system is low.
  • This application provides a photovoltaic power supply system, which can make the abnormal working current of the photovoltaic power generation unit not exceed the maximum working current when a short circuit occurs, improve the safety of the photovoltaic power supply system, prolong the service life of the photovoltaic power supply system, and at the same time make a
  • the photovoltaic array can include as many photovoltaic power generation units as possible, thereby increasing the photovoltaic power generation area of the photovoltaic power supply system, improving power supply efficiency, and reducing production costs.
  • the present application provides a photovoltaic power supply system, which includes a plurality of photovoltaic arrays, a plurality of wiring devices, and at least one confluence device.
  • a plurality of photovoltaic power generation units included in one of the plurality of photovoltaic arrays can be connected in parallel to one of the plurality of wiring devices, and the number of photovoltaic power generation units included in each photovoltaic array of the plurality of photovoltaic arrays is less than or equal to the number of photovoltaic power generation units included in the photovoltaic array.
  • the ratio of the maximum operating current of the generating unit to the rated operating current is the ratio of the maximum operating current of the generating unit to the rated operating current.
  • each photovoltaic array among the plurality of photovoltaic arrays can be connected in parallel to the input end of the current confluence device through the wiring device connected to each photovoltaic array, and the output end of the current confluence device can be connected to a load.
  • the current combining device can be used to transmit the output current of each photovoltaic array to the load through the wiring device connected to each photovoltaic array.
  • a photovoltaic array in a photovoltaic power supply system may include multiple photovoltaic power generation units.
  • the number of photovoltaic power generation units is less than or equal to the ratio of the maximum operating current of the photovoltaic power generation units to the rated operating current. It can be understood that if the maximum working current of a photovoltaic power generation unit is K times the rated working current, then a photovoltaic array can contain up to K photovoltaic power generation units, (here K is a natural number, when K is not an integer, then down Rounding).
  • the photovoltaic power supply system can limit the number of photovoltaic power generation units in each photovoltaic array, thereby ensuring that in a photovoltaic array, if a photovoltaic power generation unit short-circuits, the fault operating current in the short-circuit faulty photovoltaic power generation unit will (for example, the current that is converged into the short-circuited photovoltaic power generation unit by the output current of other non-faulty photovoltaic power generation units) does not exceed the maximum operating current of the photovoltaic power generation unit (that is, does not exceed the maximum operating current that the photovoltaic power generation unit can withstand current).
  • each photovoltaic array in the photovoltaic array can be connected to the confluence device in parallel through the wiring device connected to each photovoltaic array, and the output current of each photovoltaic array is transmitted to the load through the wiring device and the confluence device.
  • the abnormal operating current that the photovoltaic power generation unit bears when a short circuit occurs does not exceed the maximum operating current, which improves the safety of the photovoltaic power supply system and prolongs the service life of the photovoltaic power supply system.
  • it can also make a photovoltaic array As many photovoltaic power generation units as possible can be included, thereby increasing the photovoltaic power generation area of the photovoltaic power supply system, improving power supply efficiency, and reducing production costs.
  • the flow confluence device may include a plurality of anti-inflow modules, and one wiring device among the plurality of connection devices may be connected to the flow confluence device through one of the plurality of anti-inflow modules.
  • the positive pole of each wiring device among the plurality of wiring devices can be connected to the positive input end of the confluence device through each of the multiple anti-influx modules, and the negative pole of each wiring device can be connected to the negative input end of the confluence device.
  • the current confluence device can be used to prevent other non-short-circuited photovoltaic arrays from outputting current to any short-circuited photovoltaic array through each anti-backflow module when any photovoltaic array is short-circuited. It can be understood that when a photovoltaic power generation unit in a photovoltaic array is short-circuited, the equivalent resistance of the faulty photovoltaic array will become smaller. Flowing to the load, but backflowing into the failed photovoltaic array, not only hinders the photovoltaic power supply system from supplying energy to the load, but also endangers the safety of components in the photovoltaic system (for example, photovoltaic power generation units in the failed photovoltaic array).
  • the current confluence device can prevent other non-short-circuited photovoltaic arrays from outputting current to any short-circuited photovoltaic array through each anti-backflow module, thereby improving the safety of the photovoltaic power supply system , while prolonging the service life of the photovoltaic power supply system, it ensures that the output current of each photovoltaic array is normally transmitted to the load, which improves the stability and work efficiency of the photovoltaic power supply system.
  • the anti-backflow module can be a diode, a metal oxide semiconductor field effect transistor MOSFET, a gallium nitride transistor GaNHEMT or an insulated gate
  • the bipolar transistor IGBT enriches the component selection and applicable scenarios of the photovoltaic power supply system.
  • the photovoltaic power supply system may further include multiple sets of transmission lines, multiple A photovoltaic array in the photovoltaic array can be connected to one wiring device in the plurality of wiring devices through a group of transmission lines in multiple groups of transmission lines.
  • the photovoltaic arrays of the photovoltaic power supply system can be symmetrically arranged in the photovoltaic power supply system to form a photovoltaic array group, and the wiring devices corresponding to each photovoltaic array can be arranged symmetrically at each side edge of the photovoltaic array group. overlap.
  • the symmetrical arrangement of the photovoltaic arrays in the photovoltaic power supply system in the photovoltaic power supply system may include axisymmetric arrangement, central symmetrical arrangement or other arrangements in which the transmission lines corresponding to the photovoltaic arrays do not overlap.
  • a photovoltaic array group includes two photovoltaic arrays
  • the two photovoltaic arrays can be symmetrically arranged laterally, and correspondingly, the wiring devices corresponding to the two photovoltaic arrays can be arranged symmetrically on the left and right edges of the photovoltaic array group (or the wiring devices corresponding to the two photovoltaic arrays can be arranged symmetrically on the upper or lower edge of the photovoltaic array group at the same time), so that the transmission lines corresponding to each photovoltaic array do not overlap; or, the two photovoltaic arrays can be longitudinally symmetrically arranged
  • the wiring devices corresponding to the two photovoltaic arrays can be symmetrically arranged on the upper and lower edges of the photovoltaic array group (or the corresponding wiring devices of the two photovoltaic arrays can be symmetrically arranged on the left side or the lower side of the photovoltaic array group at the same time) right edge), so that the transmission lines corresponding to
  • each photovoltaic array can be extended and arranged according to the symmetrical arrangement of two photovoltaic arrays when a photovoltaic array group includes two photovoltaic arrays, or can be arranged according to the central symmetry
  • the wiring devices corresponding to each photovoltaic array can be symmetrically arranged at each side edge of the photovoltaic array group, so that the transmission lines corresponding to each photovoltaic array do not overlap.
  • the wiring devices corresponding to each photovoltaic array can be symmetrically arranged at the side edges of the photovoltaic array group, and on the basis of ensuring that the transmission lines corresponding to each photovoltaic array do not overlap, the arrangement is flexible and diverse. It adapts to different application scenarios and improves the applicability of the photovoltaic power supply system.
  • the photovoltaic power supply system may further include multiple sets of transmission lines, multiple A photovoltaic array in the photovoltaic array can be connected to one wiring device in the plurality of wiring devices through a group of transmission lines in multiple groups of transmission lines.
  • the photovoltaic arrays of the photovoltaic power supply system can be arranged side by side in the photovoltaic power supply system to form a photovoltaic array group, and the wiring devices corresponding to at least two photovoltaic arrays in the photovoltaic array group can be arranged on the same side edge of the photovoltaic array group.
  • the overlapping part of the transmission line corresponding to the photovoltaic array can be insulated.
  • the parallel arrangement of the photovoltaic arrays in the photovoltaic power supply system in the photovoltaic power supply system may include horizontal parallel arrangement, vertical parallel arrangement, or other arrangements in which transmission lines corresponding to the photovoltaic arrays overlap.
  • the wiring devices corresponding to each photovoltaic array can be collectively arranged at the edge of the same side of the photovoltaic array group, or separately arranged at multiple side edges of the photovoltaic array group.
  • a photovoltaic array group includes two photovoltaic arrays
  • the two photovoltaic arrays can be arranged side by side in a horizontal direction, and correspondingly, the wiring devices corresponding to the two photovoltaic arrays can be centrally arranged on the left or right side of the photovoltaic array group
  • the overlapping parts of the transmission lines corresponding to each photovoltaic array can be insulated; or, two photovoltaic arrays can be arranged side by side vertically, and correspondingly, the wiring devices corresponding to the two photovoltaic arrays can be centrally arranged in the photovoltaic array group.
  • the overlapping parts of the transmission lines corresponding to each photovoltaic array can be insulated.
  • each photovoltaic array can be extended according to the horizontal or vertical arrangement when a photovoltaic array group includes two photovoltaic arrays, or can be arranged according to the horizontal N PV arrays * M PV arrays are arranged side by side in the vertical direction (here N and M are integers), and at the same time, the wiring devices corresponding to each PV array can be centrally arranged on the same side edge of the PV array group, or separately centralized Arranged at the edges of multiple sides of the photovoltaic array group, the overlapping parts of the transmission lines corresponding to each photovoltaic array can be insulated.
  • the wiring devices corresponding to each photovoltaic array can be arranged collectively at the same side edge of the photovoltaic array group or separately concentrated at multiple side edges of the photovoltaic array group.
  • the overlapping parts of the transmission lines can be insulated. While ensuring the safe insulation between the corresponding transmission lines of each photovoltaic array, the arrangement is flexible and diverse, which can adapt to different application scenarios and improve the applicability of the photovoltaic power supply system.
  • the distance between any two groups of transmission lines in the overlapping part of the transmission lines corresponding to each photovoltaic array can be greater than or equal to the insulation distance
  • each The overlapping part of the transmission line corresponding to the photovoltaic array can be wrapped with an insulating material diaphragm or filled with insulating glue to realize the insulation treatment of the overlapping part of the transmission line corresponding to each photovoltaic array, which enriches the insulation treatment method of the transmission line in the photovoltaic power supply system , further improving the applicability of the photovoltaic power supply system.
  • the photovoltaic power supply system may further include a converter circuit, the output end of the confluence device is connected to the load through the converter circuit.
  • the photovoltaic power supply system may further include a DC bus, and the output end of the busbar may be connected to the converter circuit through the DC bus.
  • the photovoltaic power supply system may further include a transformer, and the converter circuit may be connected to a load through the transformer.
  • the photovoltaic power supply system may further include a grid-connecting and off-grid wiring device, and the transformer may be connected to a load through the grid-connecting and off-grid wiring device.
  • connection mode of the confluence device and the load in the photovoltaic power supply system is flexible, and the composition of the functional modules in the photovoltaic power supply system is diverse and flexible, which can improve the diversity of application scenarios of the photovoltaic power supply system and enhance the adaptability of the photovoltaic power supply system .
  • Fig. 1 is a schematic diagram of the application scenario of the photovoltaic power supply system provided by the present application
  • Fig. 2 is a structural schematic diagram of the photovoltaic power supply system provided by the present application.
  • Fig. 3 is a schematic diagram of a connection relationship between multiple photovoltaic arrays and confluence devices provided by the present application;
  • Fig. 4 is a schematic diagram of another connection relationship between a plurality of photovoltaic arrays and a confluence device provided by the present application;
  • Fig. 5 is another structural schematic diagram of the photovoltaic power supply system provided by the present application.
  • Fig. 6 is another structural schematic diagram of the photovoltaic power supply system provided by the present application.
  • Fig. 7 is another structural schematic diagram of the photovoltaic power supply system provided by the present application.
  • Solar energy is an inexhaustible, inexhaustible, non-polluting green energy bestowed by nature.
  • solar energy is a clean, renewable new energy that plays a wide role in people's lives and work , one of which is the conversion of solar energy into electricity.
  • Solar power generation can be divided into photothermal power generation and photovoltaic power generation, and the power supply system provided in this application can be a power supply system based on solar photovoltaic power generation.
  • Solar photovoltaic power generation has the characteristics of no moving parts, no noise, no pollution, and high reliability. It has excellent application prospects in communication power supply systems in remote areas.
  • the photovoltaic power supply equipment for example, photovoltaic array
  • the photovoltaic power supply system can be integrated and installed in a fixed position (for example, the photovoltaic array is arranged in the glass of the building), so that the received Light energy or solar energy is converted into electrical energy to power the load.
  • the photovoltaic power supply system provided in this application can be applied to photovoltaic power generation devices in building glass, bridge deck glass, pavement glass, or other buildings or facilities. The details can be determined according to the actual application scenario, and there is no limitation here.
  • FIG. 1 is a schematic diagram of an application scenario of a photovoltaic power supply system provided in this application.
  • the photovoltaic power supply system may include multiple photovoltaic arrays, multiple wiring devices and at least one confluence device.
  • the photovoltaic array here can be arranged in building glass, bridge deck glass, road glass or other buildings or photovoltaic power generation devices.
  • the photovoltaic power supply system provided by this application is suitable for supplying power to base station equipment in remote areas with no or poor mains power, or battery power, or household equipment (such as refrigerators, air conditioners, etc.) and other types of electrical equipment.
  • the power supply can be determined according to the actual application scenario, and there is no limitation here.
  • the load in FIG. 1 may be a power grid, a storage battery, electrical equipment of a building, lighting equipment of a bridge, or other electrical equipment.
  • the photovoltaic power supply system provided by the present application will be exemplarily described below by taking the photovoltaic array arranged on the glass of a building as an example to supply power to the power grid.
  • the power grid here may include power consumption equipment or power transmission equipment such as transmission lines, power transfer sites, storage batteries, communication base stations, or household equipment.
  • each photovoltaic array among multiple photovoltaic arrays can be connected in parallel to the input terminal of the confluence device through the wiring device connected to each photovoltaic array, and the output terminal of the confluence device can be connected to a load.
  • the current combining device can be used to transmit the output current of each photovoltaic array to the load through the wiring device connected to each photovoltaic array.
  • the photovoltaic array includes multiple photovoltaic power generation units (as shown in the gray box in the figure), and the photovoltaic power supply system can limit the number of photovoltaic power generation units in each photovoltaic array to ensure that in a photovoltaic array, if one
  • the fault operating current in the short-circuit faulty photovoltaic power generation unit for example, the current converged by the output current of other unfailed photovoltaic power generation units into the short-circuited photovoltaic power generation unit
  • the maximum operating current that is, not exceeding the maximum operating current that the photovoltaic power generation unit can withstand).
  • each photovoltaic array in the photovoltaic array can be connected to the confluence device in parallel through the wiring device connected to each photovoltaic array, and the output current of each photovoltaic array is transmitted to the load through the wiring device and the confluence device.
  • the abnormal operating current that the photovoltaic power generation unit bears when a short circuit occurs does not exceed the maximum operating current, which improves the safety of the photovoltaic power supply system and prolongs the service life of the photovoltaic power supply system.
  • a photovoltaic array can include as many The photovoltaic power generation unit, thereby increasing the photovoltaic power generation area of the photovoltaic power supply system, improving power supply efficiency, and reducing production costs.
  • the photovoltaic power supply system provided by the present application will be illustrated below with reference to FIG. 2 to FIG. 7 .
  • FIG. 2 is a schematic structural diagram of a photovoltaic power supply system provided by the present application.
  • the photovoltaic power supply system may include multiple photovoltaic arrays (for example, photovoltaic array a to photovoltaic array j), multiple wiring devices (for example, wiring device a to wiring device j) and at least A confluence device.
  • a plurality of photovoltaic power generation units included in one of the plurality of photovoltaic arrays can be connected in parallel to one of the plurality of wiring devices, and the number of photovoltaic power generation units included in each photovoltaic array of the plurality of photovoltaic arrays is less than or equal to the number of photovoltaic power generation units included in the photovoltaic array.
  • each photovoltaic array among the plurality of photovoltaic arrays can be connected in parallel to the input end of the current confluence device through the wiring device connected to each photovoltaic array, and the output end of the current confluence device can be connected to a load.
  • the current combining device can be used to transmit the output current of each photovoltaic array to the load through the wiring device connected to each photovoltaic array.
  • a photovoltaic array in the photovoltaic power supply system may include multiple photovoltaic power generation units.
  • the number of photovoltaic power generation units is less than or equal to the ratio of the maximum operating current of the photovoltaic power generation units to the rated operating current. It can be understood that if the maximum working current of a photovoltaic power generation unit is K times the rated working current, then a photovoltaic array can contain up to K photovoltaic power generation units, (here K is a natural number, when K is not an integer, then down Rounding).
  • the photovoltaic power supply system can limit the number of photovoltaic power generation units in each photovoltaic array, thereby ensuring that in a photovoltaic array, if a photovoltaic power generation unit short-circuits, the fault operating current in the short-circuit faulty photovoltaic power generation unit will (for example, the current that is converged into the short-circuited photovoltaic power generation unit by the output current of other non-faulty photovoltaic power generation units) does not exceed the maximum operating current of the photovoltaic power generation unit (that is, does not exceed the maximum operating current that the photovoltaic power generation unit can withstand current).
  • each photovoltaic array in the photovoltaic array can be connected to the confluence device in parallel through the wiring device connected to each photovoltaic array, and the output current of each photovoltaic array is transmitted to the load through the wiring device and the confluence device.
  • the abnormal operating current that the photovoltaic power generation unit bears when a short circuit occurs does not exceed the maximum operating current, which improves the safety of the photovoltaic power supply system and prolongs the service life of the photovoltaic power supply system.
  • it can also make a photovoltaic array As many photovoltaic power generation units as possible can be included, thereby increasing the photovoltaic power generation area of the photovoltaic power supply system, improving power supply efficiency, and reducing production costs.
  • the confluence device may include multiple anti-backflow modules.
  • FIG. 3 is a schematic diagram of a connection relationship between multiple photovoltaic arrays and confluence devices provided by the present application. As shown in part (a) of FIG. 3, multiple photovoltaic arrays (for example, photovoltaic array a One of the multiple wiring devices (for example, wiring device a and wiring device b) corresponding to the photovoltaic array b) can be connected to the confluence device through one of the multiple anti-backflow modules.
  • the positive pole of each wiring device among the plurality of wiring devices can be connected to the positive input end of the confluence device through each of the multiple anti-influx modules, and the negative pole of each wiring device can be connected to the negative input end of the confluence device.
  • the current confluence device can be used to prevent other non-short-circuited photovoltaic arrays from outputting current to any short-circuited photovoltaic array through each anti-backflow module when any photovoltaic array is short-circuited. It can be understood that when a photovoltaic power generation unit in a photovoltaic array is short-circuited, the equivalent resistance of the faulty photovoltaic array will become smaller.
  • the anti-backflow module can be a diode, a metal oxide semiconductor field effect transistor MOSFET, a gallium nitride transistor GaNHEMT or an insulated gate bipolar transistor IGBT, which enriches the component selection and application scenarios of the photovoltaic power supply system.
  • the current confluence device can prevent other non-short-circuited photovoltaic arrays from outputting current to any short-circuited photovoltaic array through each anti-backflow module, thereby improving the safety of the photovoltaic power supply system , while prolonging the service life of the photovoltaic power supply system, it ensures that the output current of each photovoltaic array is normally transmitted to the load, which improves the stability and work efficiency of the photovoltaic power supply system.
  • the photovoltaic power supply system can also include multiple sets of transmission lines, and one photovoltaic array in multiple sets of transmission lines can be connected to multiple wiring devices through one set of transmission lines in multiple sets of transmission lines. a wiring device.
  • the photovoltaic arrays of the photovoltaic power supply system can be symmetrically arranged in the photovoltaic power supply system to form a photovoltaic array group, and the wiring devices corresponding to each photovoltaic array can be arranged symmetrically at each side edge of the photovoltaic array group. overlap.
  • the symmetrical arrangement of the photovoltaic arrays in the photovoltaic power supply system in the photovoltaic power supply system may include axisymmetric arrangement, central symmetrical arrangement or other arrangements in which the transmission lines corresponding to the photovoltaic arrays do not overlap.
  • a photovoltaic array group includes two photovoltaic arrays (that is, photovoltaic array a and photovoltaic array b)
  • the two photovoltaic arrays can be arranged laterally symmetrically, correspondingly, the two photovoltaic arrays
  • the wiring devices corresponding to each photovoltaic array can be arranged symmetrically at the left and right edges of the photovoltaic array group (or the wiring devices corresponding to two photovoltaic arrays can be symmetrically arranged on the photovoltaic array at the same time)
  • a photovoltaic array group includes two photovoltaic arrays (that is, photovoltaic array a and photovoltaic array b)
  • the two photovoltaic arrays can be longitudinally symmetrically arranged, correspondingly
  • the wiring devices corresponding to the two photovoltaic arrays can be symmetrically arranged at the upper and lower edges of the photovoltaic array group (or the corresponding wiring devices of the two photovoltaic arrays can be symmetrically arranged at the same time) left or right edge of the photovoltaic array group, not shown in the figure), so that the transmission lines corresponding to each photovoltaic array do not overlap.
  • each photovoltaic array can be extended and arranged according to the symmetrical arrangement of two photovoltaic arrays when a photovoltaic array group includes two photovoltaic arrays, or can be arranged according to the central symmetry
  • the wiring devices corresponding to each photovoltaic array can be symmetrically arranged at each side edge of the photovoltaic array group, so that the transmission lines corresponding to each photovoltaic array do not overlap.
  • the confluence device provided in the present application can be an integrated confluence device that uniformly concatenates each photovoltaic array through the wiring device of each photovoltaic array, or can concatenate each photovoltaic array in a partitioned or graded manner through the wiring device of each photovoltaic array.
  • Distributed confluence device can be an integrated confluence device that uniformly concatenates each photovoltaic array through the wiring device of each photovoltaic array, or can concatenate each photovoltaic array in a partitioned or graded manner through the wiring device of each photovoltaic array.
  • the arrangement of photovoltaic arrays and wiring devices listed in this application is only a part of the feasible arrangement, and other arrangement of transmission lines corresponding to each photovoltaic array without overlapping also falls within the protection scope of this application.
  • this connection arrangement can be applied to the situation where there are multiple wiring interfaces on the edge of the glass.
  • the arrangement of each photovoltaic array is very flexible and can be based on the glass Shape layout, thereby increasing the photovoltaic power generation area of the photovoltaic power supply system, improving power supply efficiency, and reducing production costs.
  • the wiring devices corresponding to each photovoltaic array can be symmetrically arranged at each side edge of the photovoltaic array group.
  • the arrangement method It is flexible and diverse, and can adapt to different application scenarios, improving the applicability of the photovoltaic power supply system.
  • the wiring devices corresponding to each photovoltaic array can be arranged in a centralized manner. Please refer to Figure 4 for details. As shown in part (a) of 4, the photovoltaic arrays of the photovoltaic power supply system can be arranged side by side in the photovoltaic power supply system to form a photovoltaic array group, and the wiring devices corresponding to at least two photovoltaic arrays in the photovoltaic array group can be arranged on the photovoltaic array At the edge of the same side of the group, the overlapping parts of the transmission lines corresponding to each photovoltaic array can be insulated.
  • the parallel arrangement of the photovoltaic arrays in the photovoltaic power supply system in the photovoltaic power supply system may include horizontal parallel arrangement, vertical parallel arrangement, or other arrangements in which transmission lines corresponding to the photovoltaic arrays overlap.
  • the wiring devices corresponding to each photovoltaic array can be collectively arranged at the edge of the same side of the photovoltaic array group, or separately arranged at multiple side edges of the photovoltaic array group.
  • a photovoltaic array group includes two photovoltaic arrays (that is, photovoltaic array a and photovoltaic array b)
  • the two photovoltaic arrays can be arranged side by side laterally, and correspondingly, the two photovoltaic arrays
  • the wiring devices corresponding to each photovoltaic array can be uniformly arranged on the left side (not shown in the figure) or the right edge of the photovoltaic array group, and the transmission lines corresponding to each photovoltaic array
  • the overlapping parts can be insulated.
  • a photovoltaic array group includes two photovoltaic arrays (that is, photovoltaic array a and photovoltaic array b)
  • the two photovoltaic arrays can be arranged side by side vertically, correspondingly
  • the wiring devices corresponding to the two photovoltaic arrays can be concentrated on the upper or lower side (not shown in the figure) edge of the photovoltaic array group, and the transmission lines corresponding to each photovoltaic array
  • the overlapping parts can be insulated.
  • each photovoltaic array can be extended according to the horizontal or vertical arrangement when a photovoltaic array group includes two photovoltaic arrays, or can be arranged according to the horizontal N PV arrays * M PV arrays are arranged side by side in the vertical direction (here N and M are integers), and at the same time, the wiring devices corresponding to each PV array can be centrally arranged on the same side edge of the PV array group, or separately centralized Arranged at the edges of multiple sides of the photovoltaic array group, the overlapping parts of the transmission lines corresponding to each photovoltaic array can be insulated.
  • the confluence device provided in the present application can be an integrated confluence device that uniformly concatenates each photovoltaic array through the wiring device of each photovoltaic array, or can concatenate each photovoltaic array in a partitioned or graded manner through the wiring device of each photovoltaic array.
  • Distributed confluence device can be an integrated confluence device that uniformly concatenates each photovoltaic array through the wiring device of each photovoltaic array, or can concatenate each photovoltaic array in a partitioned or graded manner through the wiring device of each photovoltaic array.
  • the arrangement of photovoltaic arrays and wiring devices listed in this application is only a part of the feasible arrangement, and the arrangement of other wiring devices corresponding to each photovoltaic array is also within the protection scope of this application.
  • this connection arrangement can be applied to the situation where there is one or a small number of wiring interfaces on the edge of the glass.
  • the arrangement of each photovoltaic array is very flexible and can The shape of the layout can increase the photovoltaic power generation area of the photovoltaic power supply system, improve power supply efficiency, and reduce production costs.
  • the distance between any two sets of transmission lines can be greater than or equal to the insulation distance
  • the overlapping part of the transmission lines corresponding to each photovoltaic array can be wrapped with an insulating material diaphragm Or fill in insulating glue to realize the insulation treatment of the overlapping parts of the transmission lines corresponding to each photovoltaic array, which enriches the insulation treatment methods of the transmission lines in the photovoltaic power supply system and further improves the applicability of the photovoltaic power supply system.
  • the wiring devices corresponding to each photovoltaic array can be collectively arranged at the same side edge of the photovoltaic array group or separately concentrated at multiple side edges of the photovoltaic array group.
  • the overlapping parts of the transmission lines corresponding to the photovoltaic arrays can be insulated. While ensuring the safe insulation between the transmission lines corresponding to each photovoltaic array, the arrangement is flexible and diverse, which can adapt to different application scenarios and improve the application of photovoltaic power supply systems. sex.
  • FIG. 5 is another structural schematic diagram of the photovoltaic power supply system provided by the present application.
  • the photovoltaic power supply system shown in FIG. 5 may also include a converter circuit, and the output terminal of the bus confluence device may be connected to a load through the converter circuit.
  • the current conversion circuit can convert the output current of the photovoltaic array into a current that matches the load through the current confluence device, and transmit the current to the load.
  • the photovoltaic power supply system may further include a DC bus, and the output end of the busbar may be connected to a load through the DC bus and the converter circuit.
  • a bus capacitor or a plurality of bus capacitors connected in series may be included on the DC bus, which may be used for energy storage.
  • a bus capacitor C is included on the DC bus.
  • the converter circuit can convert the electric energy output by the power generation device and stored at both ends of the bus capacitor C, and output corresponding current and voltage to maintain the load (for example, the power grid) to work.
  • multiple photovoltaic arrays in the photovoltaic power supply system can be connected in parallel to the confluence device through the wiring device, and then directly connected to the converter circuit through the confluence device, or can be connected to the DC bus through the confluence device and connected to the converter circuit through the DC bus. It is set according to the actual application scenario, and there is no limitation here.
  • FIG. 6 is another structural schematic diagram of the photovoltaic power supply system provided by the present application.
  • the photovoltaic array can be connected to the DC bus through the wiring device and the confluence device, and connected to the converter circuit through the DC bus, and the converter circuit is connected to the load through the transformer.
  • the output current of multiple photovoltaic arrays in the power generation device can be combined through the wiring device and the bus connection device (that is, multiple photovoltaic arrays are connected in parallel to the bus connection device through the wiring device) to provide input voltage (or input current) for the converter circuit. .
  • the converter circuit can convert the electrical energy output from the photovoltaic array and stored at both ends of the bus capacitor C (for example, convert DC electrical energy into AC electrical energy and initially boost the voltage), and then output corresponding current and voltage to the transformer.
  • the transformer can further boost the voltage and transmit it to the load (for example, the power grid) to maintain the load (for example, the power grid) working.
  • Fig. 7 is another structural schematic diagram of the photovoltaic power supply system provided by the present application.
  • the photovoltaic power supply system can also include a grid-connected and off-grid wiring device, and the converter circuit can be connected to the transmission line in the load (for example, power grid), power transfer site, storage battery, communication base station or household Equipment and other electrical equipment or power transmission equipment for power supply.
  • the load for example, power grid
  • the converter circuit can be connected to the transmission line in the load (for example, power grid), power transfer site, storage battery, communication base station or household Equipment and other electrical equipment or power transmission equipment for power supply.
  • connection mode of the confluence device and the load in the photovoltaic power supply system is flexible, and the composition of the functional modules in the photovoltaic power supply system is diverse and flexible, which can improve the diversity of application scenarios of the photovoltaic power supply system and enhance the adaptability of the photovoltaic power supply system .
  • the photovoltaic power supply system can make the abnormal operating current of the photovoltaic power generation unit not exceed the maximum operating current when a short circuit occurs, improving the safety of the photovoltaic power supply system , prolong the service life of the photovoltaic power supply system, and at the same time enable a photovoltaic array to include as many photovoltaic power generation units as possible, thereby increasing the photovoltaic power generation area of the photovoltaic power supply system, improving power supply efficiency, and reducing production costs.

Landscapes

  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Photovoltaic Devices (AREA)

Abstract

La présente demande concerne un système d'alimentation en énergie photovoltaïque. Le système d'alimentation en énergie photovoltaïque comprend une pluralité de réseaux photovoltaïques, une pluralité de dispositifs de câblage, et au moins un dispositif de collecte de courant ; le nombre d'unités de génération d'énergie photovoltaïque comprises dans chaque réseau de la pluralité de réseaux photovoltaïques est inférieur ou égal au rapport d'un courant de travail maximal des unités de production d'énergie photovoltaïque à un courant de travail nominal de celles-ci ; le dispositif de collecte de courant est utilisé pour transmettre des courants de sortie des réseaux photovoltaïques à une charge au moyen des dispositifs de câblage connectés aux réseaux photovoltaïques. Au moyen de la présente demande, le courant de travail anormal porté par une unité de production d'énergie photovoltaïque lorsque l'unité de production d'énergie photovoltaïque est court-circuitée ne dépasse pas son courant de travail maximal, la sécurité du système d'alimentation en énergie photovoltaïque est améliorée, et la durée de vie du système d'alimentation en énergie photovoltaïque est prolongée. De plus, au moyen de la présente demande, un réseau photovoltaïque peut comprendre autant d'unités de production d'énergie photovoltaïque que possible ; ainsi, la zone de production d'énergie photovoltaïque du système d'alimentation électrique photovoltaïque est augmentée, l'efficacité d'alimentation en énergie est améliorée, et le coût de production est réduit.
PCT/CN2022/126646 2022-02-16 2022-10-21 Système d'alimentation en énergie photovoltaïque WO2023155463A1 (fr)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
CN202210143562.6A CN114640128A (zh) 2022-02-16 2022-02-16 光伏供电系统
CN202210143562.6 2022-02-16

Publications (1)

Publication Number Publication Date
WO2023155463A1 true WO2023155463A1 (fr) 2023-08-24

Family

ID=81946062

Family Applications (1)

Application Number Title Priority Date Filing Date
PCT/CN2022/126646 WO2023155463A1 (fr) 2022-02-16 2022-10-21 Système d'alimentation en énergie photovoltaïque

Country Status (2)

Country Link
CN (1) CN114640128A (fr)
WO (1) WO2023155463A1 (fr)

Families Citing this family (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN114640128A (zh) * 2022-02-16 2022-06-17 华为数字能源技术有限公司 光伏供电系统

Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120048325A1 (en) * 2010-08-24 2012-03-01 Sanyo Electric Co., Ltd. Photovoltaic power generating device, and controlling method
US20140058688A1 (en) * 2012-08-27 2014-02-27 Hitachi, Ltd. Failure Diagnosis Method for Photovoltaic Power Generation System
WO2015043663A1 (fr) * 2013-09-27 2015-04-02 Abb Technology Ag Boîte de combinateur d'une partie à courant continu (cc) d'une centrale photovoltaïque (pv) et partie cc comprenant la boîte de combinateur
CN104836528A (zh) * 2015-04-28 2015-08-12 北京汉能光伏投资有限公司 用于汇流箱的汇流检测方法及系统、太阳能电站
CN106814265A (zh) * 2015-11-27 2017-06-09 中国电力科学研究院 一种光伏逆变器发电效率测试系统
CN112260533A (zh) * 2020-09-11 2021-01-22 华为技术有限公司 一种直流汇流箱、逆变器、光伏系统及保护方法
CN114640128A (zh) * 2022-02-16 2022-06-17 华为数字能源技术有限公司 光伏供电系统

Patent Citations (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20120048325A1 (en) * 2010-08-24 2012-03-01 Sanyo Electric Co., Ltd. Photovoltaic power generating device, and controlling method
US20140058688A1 (en) * 2012-08-27 2014-02-27 Hitachi, Ltd. Failure Diagnosis Method for Photovoltaic Power Generation System
WO2015043663A1 (fr) * 2013-09-27 2015-04-02 Abb Technology Ag Boîte de combinateur d'une partie à courant continu (cc) d'une centrale photovoltaïque (pv) et partie cc comprenant la boîte de combinateur
CN104836528A (zh) * 2015-04-28 2015-08-12 北京汉能光伏投资有限公司 用于汇流箱的汇流检测方法及系统、太阳能电站
CN106814265A (zh) * 2015-11-27 2017-06-09 中国电力科学研究院 一种光伏逆变器发电效率测试系统
CN112260533A (zh) * 2020-09-11 2021-01-22 华为技术有限公司 一种直流汇流箱、逆变器、光伏系统及保护方法
CN114640128A (zh) * 2022-02-16 2022-06-17 华为数字能源技术有限公司 光伏供电系统

Also Published As

Publication number Publication date
CN114640128A (zh) 2022-06-17

Similar Documents

Publication Publication Date Title
Chen et al. A comparison of medium voltage high power DC/DC converters with high step-up conversion ratio for offshore wind energy systems
US8901773B2 (en) Power supply system and photovoltaic device therefor
Liu et al. VSCs-HVDC may improve the Electrical Grid Architecture in future world
CN102185480B (zh) 一种双向隔离直流变换器
CN204578458U (zh) 一种汇流箱电路结构及光伏发电系统
CN205646843U (zh) 用于可再生能源发电的并网逆变器及可再生能源发电系统
CN101826837A (zh) 风力发电机变频控制功率模块
EP4075625A1 (fr) Système de transmission de puissance mer-île et son procédé de commande
WO2023155463A1 (fr) Système d'alimentation en énergie photovoltaïque
CN102005934B (zh) 用于直驱式永磁同步发电系统的可重构功率变换器
CN103050994A (zh) 一种分散整流集中逆变的风力发电系统
CN201393183Y (zh) 地域并网型光伏系统
CN102244476B (zh) 逆变电路
CN201774475U (zh) 一种基于mmc的无变压器太阳能逆变器拓扑结构
CN217720738U (zh) 一种海上柔性直流海缆永久性故障穿越系统
CN116131325A (zh) 一种用于远距离海上风电场直流汇集外送的固态变压器
CN214959442U (zh) 一种光伏组件电路及其光伏组件接线盒
CN103532395A (zh) 链式svg功率模块供电电路
CN210137187U (zh) 一种基于储能的多换流链交交变频器
CN204333978U (zh) 一种单相微型光伏并网逆变器
CN210137183U (zh) 一种输电系统
CN210183012U (zh) 一种输电系统
TWI443927B (zh) 具相位切換裝置之線材系統
CN201639517U (zh) 一种光伏mppt控制电路
CN111193290B (zh) 一种分层直流输电系统

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: 22926767

Country of ref document: EP

Kind code of ref document: A1