CN113315464A - Blade device, photovoltaic power generation system and photovoltaic power generation control method - Google Patents
Blade device, photovoltaic power generation system and photovoltaic power generation control method Download PDFInfo
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- CN113315464A CN113315464A CN202110764145.9A CN202110764145A CN113315464A CN 113315464 A CN113315464 A CN 113315464A CN 202110764145 A CN202110764145 A CN 202110764145A CN 113315464 A CN113315464 A CN 113315464A
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- 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
- H02S30/00—Structural details of PV modules other than those related to light conversion
- H02S30/20—Collapsible or foldable PV modules
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- 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
- H02S20/00—Supporting structures for PV modules
- H02S20/30—Supporting structures being movable or adjustable, e.g. for angle adjustment
- H02S20/32—Supporting structures being movable or adjustable, e.g. for angle adjustment specially adapted for solar tracking
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- 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
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Abstract
本发明公开了一种叶片装置、光伏发电系统及光伏发电控制方法，其中，叶片装置包括叶片组件及叶片驱动装置，叶片组件包括多个同轴设置的光伏叶片，叶片驱动装置驱动光伏叶片同轴旋转折叠和展开，叶片驱动装置包括旋转装置及连接相邻两个光伏叶片传递动力的开合传动装置，位于端部的光伏叶片与旋转装置的旋转输出端固定连接。在本申请提供的叶片装置中，通过旋转装置带动光伏叶片开合，开合传动装置实现相邻叶片传动，进而实现所有光伏叶片转动，进而可以使得光伏叶片在恶劣环境下呈折叠设置，减少叶片组件的受力面积，进而减少损坏的情况，有效地延长了光伏发电系统的使用寿命。
The invention discloses a blade device, a photovoltaic power generation system and a photovoltaic power generation control method, wherein the blade device includes a blade assembly and a blade driving device, the blade assembly includes a plurality of coaxially arranged photovoltaic blades, and the blade driving device drives the coaxial photovoltaic blades Rotating folding and unfolding, the blade driving device includes a rotating device and an opening and closing transmission device connecting two adjacent photovoltaic blades to transmit power, and the photovoltaic blade at the end is fixedly connected to the rotation output end of the rotating device. In the blade device provided in the present application, the photovoltaic blades are driven to open and close by the rotating device, and the opening and closing transmission device realizes the transmission of adjacent blades, thereby realizing the rotation of all photovoltaic blades, so that the photovoltaic blades can be folded in harsh environments, reducing the number of blades The force-bearing area of the components is reduced, thereby reducing the damage and effectively extending the service life of the photovoltaic power generation system.
Description
Technical Field
The invention relates to the technical field of photovoltaic power generation, in particular to a blade device. The invention also relates to a photovoltaic power generation system comprising the blade device. The invention also relates to a photovoltaic power generation control method.
Background
A photovoltaic light receiving plane of the double-shaft tracking distributed photovoltaic power generation system is fixed, and more photovoltaic modules are installed for reducing the cost of a single body, so that the area of the double-shaft tracking distributed photovoltaic power generation system subjected to external load force is increased.
However, the photovoltaic module may turn over, fall off, or the bracket may be twisted in a severe environment, which may reduce the service life of the system.
Therefore, how to prolong the service life of the photovoltaic power generation system is a technical problem to be solved urgently by those skilled in the art.
Disclosure of Invention
The invention aims to provide a blade device to prolong the service life of a photovoltaic power generation system. Another object of the present invention is to provide a photovoltaic power generation system including the above blade device.
To achieve the above object, the present invention provides a blade device including:
the photovoltaic blade assembly comprises a plurality of coaxially arranged photovoltaic blades;
and the blade driving device drives the photovoltaic blades to coaxially rotate, fold and unfold, the blade driving device comprises a rotating device and an opening and closing transmission device which is connected with two adjacent photovoltaic blades and transmits power, and the photovoltaic blades positioned at the first end part are fixedly connected with the rotating output end of the rotating device.
Preferably, the opening and closing transmission device comprises a sliding rod, and a limiting shaft and an opening and closing limiting part which are arranged on two opposite sides of the photovoltaic blade, wherein a sliding groove for accommodating the end part of the sliding rod is formed in the opening and closing limiting part, one end of the sliding rod is hinged to the limiting shaft, the other end of the sliding rod is positioned in the sliding groove, a blade folding abutting position and a blade unfolding abutting position for limiting the rotation of the sliding rod are arranged in the sliding groove, and when the sliding rod rotates to the blade folding abutting position and the blade unfolding abutting position, the sliding rod stops rotating;
the photovoltaic blade that is located the second tip for rotary device's casing is fixed, and is located the second tip set up on the photovoltaic blade the folded butt position of blade with the blade expandes the butt position and is equipped with first limit switch and second limit switch respectively, first tip with the second tip is the blade subassembly is followed the relative both ends of photovoltaic blade superpose direction.
Preferably, still include the back shaft, photovoltaic blade passes through the locating part that opens and shuts connect in on the back shaft, the locating part cover that opens and shuts is located on the back shaft, photovoltaic blade follows the axis direction of back shaft superposes in proper order.
Preferably, the limiting shaft is located on a light-facing surface of the photovoltaic blade, and the opening and closing limiting member is located on a backlight surface of the photovoltaic blade.
Preferably, the opening and closing limiting part is a supporting part of the photovoltaic blade, and two ends of the opening and closing limiting part extend to two ends of the photovoltaic blade in the length direction.
Preferably, the rotating device is located below the photovoltaic blade and is fixedly connected with the photovoltaic blade at the bottom end.
Preferably, the blade driving device further comprises a control device for controlling the operation of the blade driving device.
Preferably, the rotating device is a dc motor.
A photovoltaic power generation system comprising a blade arrangement as claimed in any one of the preceding claims.
Preferably, the system further comprises an energy storage subsystem, a double-shaft tracking system, a communication system, a control system and an external interface device which are integrated.
A photovoltaic power generation control method comprises the steps of receiving a starting signal; controlling the blade device to start working when the starting signal is received; the vane device is any one of the vane devices described above.
Preferably, whether to execute auto-launch logic;
if yes, executing automatic starting logic;
if not, executing a manual starting switch.
Preferably, the auto-launch logic comprises: and acquiring real-time environment data, judging whether the data reach the standard, and if so, driving the blade assembly to unfold by the blade driving device.
Preferably, the real-time environment data comprises a primary index and a secondary index, the primary index comprises wind speed and/or temperature and/or precipitation, the secondary index is illumination, when the primary index reaches the standard, whether the secondary index reaches the standard is judged, and when the first index and the secondary index both reach the standard, the blade driving device drives the blade assembly to unfold.
Preferably, if the primary index does not reach the standard, the blade device is in a standby state and does not act, and if the secondary index does not reach the standard, the blade driving device drives the blade assembly to be folded.
Preferably, the executing manual driving switch includes a polling manual control instruction, whether the driving switch executes the unfolding of the blade assembly is judged, and if yes, the blade control device controls the blade driving device to perform the unfolding action of the photovoltaic blade; if not, whether the blade assembly folding is executed by the driving switch or not is judged, if yes, the blade driving device drives the blade assembly to fold, and if not, the blade control device controls the blade driving device to stand by and not to act.
In the technical scheme, the blade device provided by the invention comprises a blade assembly and a blade driving device, wherein the blade assembly comprises a plurality of coaxially arranged photovoltaic blades, the blade driving device drives the photovoltaic blades to coaxially rotate, fold and unfold, the blade driving device comprises a rotating device and an opening and closing transmission device which is connected with two adjacent photovoltaic blades and transmits power, and the photovoltaic blades at the end parts are fixedly connected with the rotating output end of the rotating device. Photovoltaic power generation system normal during operation, photovoltaic blade are the expansion state, and when external environment influences photovoltaic blade, drive photovoltaic blade through rotary device and rotate, adjacent photovoltaic blade links through the transmission that opens and shuts, finally realizes that photovoltaic blade is folding. When photovoltaic blades need to be unfolded, the rotating device drives the photovoltaic blades to rotate reversely, the adjacent photovoltaic blades are linked through the opening and closing transmission device, and finally all the photovoltaic blades are in an unfolded state.
According to the photovoltaic blade device, the photovoltaic blades are driven to open and close through the rotating device, the opening and closing transmission device achieves transmission of the adjacent blades, all the photovoltaic blades rotate, the photovoltaic blades can be folded under the severe environment, the stress area of the blade assemblies is reduced, damage is reduced, and the service life of a photovoltaic power generation system is effectively prolonged.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the provided drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a light-facing surface of a photovoltaic power generation system according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a backlight surface of a photovoltaic power generation system according to an embodiment of the present invention;
fig. 3 is a schematic structural diagram of a light-facing surface of a photovoltaic blade according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of a backlight surface of a photovoltaic blade according to an embodiment of the present invention;
fig. 5 is a schematic structural diagram of a photovoltaic power generation system according to an embodiment of the present invention.
Wherein in FIGS. 1-5:
1-a photovoltaic blade;
2-a rotating device;
3-opening and closing the limiting part;
4-a slide bar;
5-a limiting shaft;
6-external interface device;
7-a communication system and a control system;
8-an energy storage subsystem;
9-a two-axis tracking system;
10-blade device.
Detailed Description
The core of the invention is to provide a blade device to prolong the service life of a photovoltaic power generation system. The other core of the invention is to provide a photovoltaic power generation system comprising the blade device, and the other core of the invention is to provide a photovoltaic power generation control method.
In order to make the technical solutions of the present invention better understood by those skilled in the art, the present invention will be further described in detail with reference to the accompanying drawings and embodiments.
Please refer to fig. 1 to fig. 4.
In one embodiment, the blade device provided by the embodiment of the present invention includes a blade assembly and a blade driving device, the blade assembly includes a plurality of coaxially disposed photovoltaic blades 1, and the blade driving device drives the photovoltaic blades 1 to coaxially rotate, fold and unfold.
The blade driving device comprises a rotating device 2 and an opening and closing transmission device which is connected with two adjacent photovoltaic blades 1 and transmits power, and the photovoltaic blades 1 positioned at the end parts are fixedly connected with the rotating output end of the rotating device 2. Specifically, the rotating device 2 is preferably a dc motor. In order to avoid damage of the rotating means 2 by rain, preferably, the rotating means 2 is located below the bottommost photovoltaic blade 1.
Photovoltaic power generation system normal during operation, photovoltaic blade 1 is the expansion state, and when external environment influence photovoltaic blade 1, drive photovoltaic blade 1 through rotary device 2 and rotate, adjacent photovoltaic blade 1 links through the transmission that opens and shuts, finally realizes that photovoltaic blade 1 is folding. When photovoltaic blade 1 needs to be unfolded, rotating device 2 drives photovoltaic blade 1 to rotate reversely, adjacent photovoltaic blades 1 are linked through the opening and closing transmission device, and finally all photovoltaic blades 1 are in an unfolded state.
In one embodiment, the opening and closing transmission device includes a sliding rod 4, and a limiting shaft 5 and an opening and closing limiting member 3 disposed on two opposite sides of the photovoltaic blade 1. Be equipped with the spout that is used for the 4 tip of holding slide bar on the locating part 3 that opens and shuts, 4 one ends of slide bar are articulated with spacing axle 5, and the other end is located the spout, is equipped with in the spout to be used for the folding butt position of 4 pivoted blades of spacing slide bar and blade to expand the butt position, when slide bar 4 rotated to the folding butt position of blade and blade expansion butt position, slide bar 4 stall. The photovoltaic blade 1 at the second end is fixed relative to the housing of the rotating device 2, and the first end and the second end are opposite ends of the blade assembly in the stacking direction of the photovoltaic blade 1. The folding butt position of blade and the blade of the spout that sets up on the photovoltaic blade 1 that is located the second tip expand the butt position and be equipped with first limit switch and second limit switch respectively specific, and locating part 3 that opens and shuts can install at photovoltaic blade 1's surface, also can imbed on photovoltaic blade 1.
In a concrete working process, direct current motor is used for providing power, and direct current motor's output shaft drives the transmission that opens and shuts and carries out the motion that opens and shuts to photovoltaic blade 1 group, and the first limit switch of specific maximum closure degree is located the top of spout, and the second limit switch of the biggest exhibition aperture is located the spout and opens and shut the contact point of locating part 3 lock-up time position department. After the photovoltaic blade 1 rotates to reach the designated position, the opening and closing limiting part 3 presses the first limiting switch or the second limiting switch and sends a limiting signal to the control device, and then the control device controls the direct current motor to stop running through the driving circuit.
In a specific embodiment, the uppermost one of the photovoltaic blades 1 may be a fixed blade, which is fixedly and rigidly connected to the output shaft of the dc motor, and the rotating shaft of the dc motor rotates and drives the fixed blade to fold and unfold through an opening and closing transmission device coupled to the next photovoltaic blade 1; the lowermost photovoltaic blade 1 is directly connected with the direct current motor shell body and used for providing a fixed reference position when the photovoltaic blade 1 is closed; the photovoltaic blades 1 except the uppermost and the lowermost are movable blades and are not rigidly connected with a direct current motor, so that the movable blades can be opened and closed along with the photovoltaic blades 1 on the upper layer. The linkage effect between the photovoltaic blades 1 is realized by limiting and rotating the sliding rods 4 on the front sides and the sliding grooves on the back sides of the upper photovoltaic blade 1 and the lower photovoltaic blade 1.
In order to improve the installation stability, preferably, this photovoltaic power generation system still includes the back shaft, and photovoltaic blade 1 is connected on the back shaft through the locating part 3 that opens and shuts, and the locating part 3 cover that opens and shuts is located on the back shaft, and photovoltaic blade 1 superposes along the axis direction of back shaft in proper order.
In order to improve the power generation efficiency, preferably, the limiting shaft 5 is located on the light-facing surface of the photovoltaic blade 1, the opening and closing limiting part 3 is located on the backlight surface of the photovoltaic blade 1, and the limiting shaft 5 is small in size and is arranged on the light-facing surface of the photovoltaic blade 1, so that the influence on the power generation working area of the photovoltaic blade 1 is reduced.
In a specific embodiment, preferably, the opening and closing limiting part 3 is a supporting part of the photovoltaic blade 1, and two ends of the opening and closing limiting part 3 extend to two ends of the photovoltaic blade 1 in the length direction. The locating part 3 that opens and shuts provides the spout on the one hand, and another convenient realization improves photovoltaic blade 1 support stability to photovoltaic blade 1 support stability.
In order to reduce the labor intensity of workers, the photovoltaic power generation system further comprises a control device for controlling the blade driving device to work. Specifically, the control device automatically performs the deployment and stacking of the photovoltaic modules according to the detected environment.
Among the blade device that this application provided, multi-disc photovoltaic blade 1 dislocation array in proper order constitutes the whole receiving plane to sunshine, and structural style is simple compact, and the bearing structure's at make full use of photovoltaic blade 1 back residual space can effectively reduce blade device 10's axial thickness, is favorable to using and accomodates the space sparingly system and compromise pleasing to the eye effect.
This application both can realize the functional requirement that linkage opened and shut between the photovoltaic blade 1 through the simple mechanical structure of slide bar 4 and spout, simultaneously because its position is located the 1 backs of photovoltaic blade, the operation surface orientation is downward, can effectively avoid piling up of dirt such as outdoor dust and gravel, has avoided causing the inefficacy condition of folding mechanism part, and the operation effect is reliable and stable.
Meanwhile, the connection form of the sliding rod 4 and the sliding groove also enhances the rigid connection effect among the photovoltaic blades 1, and is beneficial to prolonging the service life of the system.
This application can increase blade drive arrangement on original biax tracker 9 basis, and adopts simple and practical's the transmission form that opens and shuts and utilizes the position of blade back bearing structure's space design spout, make full use of equipment material, the design complexity of simplification is favorable to saving system investment cost, reduces system design expense, the extensive using widely of being convenient for.
The photovoltaic power generation system provided by the present application includes any one of the blade devices 10 described above. The foregoing describes the specific structure of the vane device 10, and the present application includes the vane device 10, which also has the above technical effects.
As shown in fig. 5, in an embodiment, the photovoltaic power generation system further includes an energy storage subsystem 8, a dual-axis tracking system 9, a communication system, a control system, and an external interface device 6. Preferably, the blade device 10 is also integrally provided.
The energy storage subsystem comprises an energy storage battery and a DC/DC converter. The energy storage battery is mainly used for balancing the difference between the real-time output of the distributed photovoltaic power generation system and the external requirement, and plays a role in sliding out; meanwhile, a stable bus voltage is provided through the DC/DC converter, so that stable power supply of links including a wireless communication module, a controller, a driving circuit and the like in the system during on-grid or off-grid is guaranteed.
The function of the double-axis tracking system 9 is consistent with that of the traditional photovoltaic double-axis tracking system 9, and the rotation of the inclination angle and the azimuth angle of the photovoltaic blade 1 is provided, so that the photovoltaic power generation capacity is improved.
The communication system and the control system mainly comprise a wireless communication module, a controller and a driving circuit. The controller is responsible for providing driving instructions for controlling the tracking of the double-shaft tracking part, the folding, opening and closing of the photovoltaic subsystem part and the like through the received manual control signals or an automatic control algorithm pre-recorded inside, and then provides driving signals for the corresponding direct current motor to operate through the driving circuit.
The external interface device 6 comprises an alternating current interface, an AC/DC bidirectional converter and a direct current interface. The alternating current interface is used for connecting an external single-phase or three-phase alternating current cable when the system is connected to the grid, and the coupling of the alternating current interface and a direct current bus inside the system is realized through an AC/DC bidirectional converter. And the direct current interface is used for connecting with the outside in a direct current system.
The designed double-shaft tracking distributed photovoltaic power generation system comprises a blade device 10, an energy storage subsystem 8, a double-shaft tracking system 9, a communication system, a control system and an external interface part, wherein all parts are directly coupled in a mechanical or electrical connection mode, the functions of all parts are clearly divided, and the whole operation effect is smooth;
during specific wiring, all parts are directly coupled in a mechanical or electrical connection mode, the functions of all parts are clearly divided, and the overall operation effect is smooth; meanwhile, the energy storage system configured inside is used for balancing the difference between the real-time output of the distributed photovoltaic power generation system and the external requirement, and plays a role in sliding out; meanwhile, a stable bus voltage is provided through the DC/DC converter, so that stable power supply of links including a wireless communication module, a controller, a driving circuit and the like in a system during grid connection/disconnection is guaranteed, and the application range and the adaptability of the system in a distributed scene are improved.
The photovoltaic power generation control method comprises the steps of receiving a starting signal; upon receipt of the activation signal, the control blade device 10 starts to operate, wherein the operation of the rotating device 2 may be manually controlled manually or the operation of the rotating device 2 may be automatically controlled by a preset condition. The vane device 10 is any of the vane devices 10 described above. The foregoing describes the specific structure of the vane device 10, and the present application includes the vane device 10, which also has the above technical effects.
Specifically, the photovoltaic power generation control method comprises the steps of judging whether to execute automatic starting logic or not;
if yes, executing automatic starting logic.
If not, executing a manual starting switch.
Specifically, the automatic start logic includes: and acquiring real-time environment data, judging whether the data reach the standard, and if so, driving the blade assembly to be unfolded by the blade driving device.
If not, the blade device 10 is in standby, and the photovoltaic blade 1 is at the folding position.
The real-time environment data comprises a primary index and a secondary index, the primary index comprises wind speed and/or temperature and/or precipitation, the secondary index is illumination, whether the secondary index reaches the standard or not is judged after the primary index reaches the standard, and when the first index and the secondary index both reach the standard, the blade driving device drives the blade assembly to unfold.
Specifically, if the primary index does not reach the standard, the blade device is in standby and does not operate, and the standby of the blade device indicates that the blade device does not perform opening and closing operations of the blade assembly. If the secondary index does not reach the standard, the blade driving device drives the blade assembly to fold.
And the illumination can be automatically judged not to reach the standard, and the photovoltaic blade 1 is controlled to move to the folding position.
When a manual starting switch is adopted, the photovoltaic blade 1 can be switched between the folded position and the unfolded position according to the requirement.
Regarding the selection of the opening and closing time of the photovoltaic blade 1, an automatic control or manual control selectable mode is adopted, the workload of manual regulation and control is reduced under normal conditions, the time for unfolding and folding the blade is intelligently and automatically selected along with the change of the environment, the photovoltaic blade 1 can be protected from being damaged by the outside severe weather such as strong wind, and solar power can be collected and converted to the maximum degree. Meanwhile, through reasonable appearance design, the coordination and the attractiveness of the environment are kept.
Specifically, executing the manual driving switch comprises polling a manual control instruction, judging whether the driving switch executes a blade assembly unfolding signal, and if so, controlling the blade driving device to perform the unfolding action of the photovoltaic blade 1 by the blade control device 10; if not, whether the driving switch executes blade assembly folding or not is judged, if so, the blade driving device drives the blade assembly folding, if not, the blade control device 10 controls the blade driving device to be standby and not to be operated, and at the moment, the standby of the blade device indicates that the blade device does not execute the opening and closing operation of the blade assembly.
Specifically, when the photovoltaic blade is unfolded and rotated as above, until the sliding rod 4 is rotated to the blade unfolding abutting position, the second limit switch of the unfolding position is triggered, and the sliding rod 4 stops rotating.
When the photovoltaic blades are folded and rotated as above, until the sliding rod 4 rotates to the blade folding abutting position, the first limit switch of the folding position is triggered, and the sliding rod 4 stops rotating
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (16)
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113834255A (en) * | 2021-11-08 | 2021-12-24 | 上海电力大学 | A refrigeration and cold storage system based on mobile photovoltaic modules |
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