CN113315464B - Blade device, photovoltaic power generation system and photovoltaic power generation control method - Google Patents

Abstract

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 drive device, the blade assembly includes a plurality of coaxially arranged photovoltaic blades, and the blade drive device drives the photovoltaic blades coaxially Rotate to fold and unfold, 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 rotating output end of the rotating device. In the blade device provided by this application, the rotating device drives the photovoltaic blades to open and close, and the opening and closing transmission device realizes the transmission of adjacent blades, and then realizes the rotation of all photovoltaic blades, and then enables the photovoltaic blades to be folded in harsh environments, reducing the number of blades. The stress-bearing area of the components reduces the damage and effectively prolongs the service life of the photovoltaic power generation system.

Description

Blade device, photovoltaic power generation system, and photovoltaic power generation control method

technical field

The invention relates to the technical field of photovoltaic power generation, in particular to a blade device. The present invention also relates to a photovoltaic power generation system comprising the above blade device. The present invention further relates to a photovoltaic power generation control method.

Background technique

The photovoltaic light-receiving plane of the dual-axis tracking distributed photovoltaic power generation system is fixed, and in order to reduce the cost of the monomer, more photovoltaic modules will be installed, resulting in an increase in the area subject to external loads.

However, in harsh environments, photovoltaic modules may fold, fall off, or brackets may be twisted, which will greatly 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.

Contents of the invention

The object of the present invention is to provide a blade device to prolong the service life of the photovoltaic power generation system. Another object of the present invention is to provide a photovoltaic power generation system including the above blade device. Another object of the present invention is to provide a photovoltaic power generation control method.

To achieve the above object, the present invention provides a blade device, comprising:

A blade assembly, the blade assembly includes a plurality of coaxially arranged photovoltaic blades;

and a blade driving device that drives the photovoltaic blades to rotate coaxially to fold and unfold. The blade driving device includes a rotating device and an opening and closing transmission device that connects two adjacent photovoltaic blades to transmit power. The photovoltaic blade is fixedly connected to the rotating output end of the rotating device.

Preferably, the opening and closing transmission device includes a sliding rod, a limiting shaft and an opening and closing limiting member arranged on opposite sides of the photovoltaic blade, and the opening and closing limiting member is provided with a sliding rod for accommodating the sliding rod. The chute at the end, one end of the sliding rod is hinged to the limiting shaft, and the other end is located in the chute, the chute is provided with a blade folding abutment for limiting the rotation of the sliding rod and The abutting position of the blade unfolding, when the sliding rod rotates to the abutting position of the folding blade and the abutting position of the blade unfolding, the sliding rod stops rotating;

The photovoltaic blades located at the second end are fixed relative to the casing of the rotating device, and the blades of the sliding slots provided on the photovoltaic blades located at the second end are folded and abutted against A first limit switch and a second limit switch are respectively provided at the blade expansion and abutment position, and the first end and the second end are for the blade assembly along the stacking direction of the photovoltaic blades opposite ends of the .

Preferably, it also includes a support shaft, the photovoltaic blade is connected to the support shaft through the opening and closing limiter, the opening and closing limiter is sleeved on the support shaft, and the photovoltaic blade is The axis directions of the support shafts are stacked sequentially.

Preferably, the limiting shaft is located on the light-facing surface of the photovoltaic blade, and the opening and closing limiting member is located on the back-light surface of the photovoltaic blade.

Preferably, the opening and closing limiting member is a supporting member of the photovoltaic blade, and the two ends of the opening and closing limiting member extend to both ends of the photovoltaic blade in the length direction.

Preferably, the rotating device is located below the photovoltaic blades and is fixedly connected to the photovoltaic blades at the bottom.

Preferably, a control device for controlling the operation of the blade driving device is also included.

Preferably, the rotating device is a DC motor.

A photovoltaic power generation system, comprising the blade device described in any one of the above.

Preferably, it also includes an integrated energy storage subsystem, a two-axis tracking system, a communication system, a control system and an external interface device.

A photovoltaic power generation control method, comprising receiving a starting signal; when receiving the starting signal, controlling the blade device to start working; the blade device is the blade device described in any one of the above.

Preferably, whether to execute autostart logic;

If so, execute the autostart logic;

If not, execute the manual start switch.

Preferably, the automatic start logic includes: collecting real-time environmental data, whether the standard is met, and if so, the blade driving device drives the blade assembly to expand.

Preferably, the real-time environmental data includes a primary index and a secondary index, the primary index includes wind speed and/or temperature and/or precipitation, the secondary index is light, and the secondary index is determined when the primary index reaches the standard. Whether the secondary index is up to standard, when both the first index and the secondary index are up to standard, the blade driving device drives the blade assembly to expand.

Preferably, if the primary index is not up to standard, the blade device is on standby without action; if the secondary index is not up to standard, the blade driving device drives the blade assembly to retract.

Preferably, the execution of the manual drive switch includes polling manual control instructions to determine whether the drive switch executes the deployment of the blade assembly, if so, the blade control device controls the blade drive device to perform the photovoltaic blade deployment action; if not , judging whether the drive switch executes the folding of the blade assembly, if yes, the blade driving device drives the blade assembly to fold, if not, the blade control device controls the blade driving device to stand by and not act.

In the above technical solution, the blade device provided by the present invention includes a blade assembly and a blade driving device. The blade assembly includes a plurality of coaxially arranged photovoltaic blades. The device and the opening and closing transmission device that connects two adjacent photovoltaic blades to transmit power, and the photovoltaic blade at the end is fixedly connected with the rotating output end of the rotating device. When the photovoltaic power generation system is working normally, the photovoltaic blades are unfolded. When the external environment affects the photovoltaic blades, the rotating device drives the photovoltaic blades to rotate, and the adjacent photovoltaic blades are linked by the opening and closing transmission device, and finally the photovoltaic blades are folded. When the photovoltaic blades need to be unfolded, the rotating device drives the photovoltaic blades to rotate in reverse, and the adjacent photovoltaic blades are linked by the opening and closing transmission device, and finally all the photovoltaic blades are in the unfolded state.

It can be seen from the above description that in the blade device provided by the present application, the photovoltaic blades are driven to open and close through the rotating device, and the opening and closing transmission device realizes the transmission of adjacent blades, and then realizes the rotation of all photovoltaic blades, which in turn can make the photovoltaic blades appear in harsh environments. The folding setting reduces the stress-bearing area of the blade assembly, thereby reducing damage and effectively prolonging the service life of the photovoltaic power generation system.

Description of drawings

In order to more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings that need to be used in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only It is an embodiment of the present invention, and those skilled in the art can also obtain other drawings according to the provided drawings without creative work.

FIG. 1 is a schematic structural view of the light-facing surface of a photovoltaic power generation system provided by an embodiment of the present invention;

2 is a schematic structural view of the backlight surface of the photovoltaic power generation system provided by the embodiment of the present invention;

Fig. 3 is a schematic structural view of the light-facing surface of the photovoltaic blade provided by the embodiment of the present invention;

Fig. 4 is a schematic structural view of the backlight surface of the photovoltaic blade provided by the embodiment of the present invention;

Fig. 5 is a schematic structural diagram of a photovoltaic power generation system provided by an embodiment of the present invention.

Among them, in Figure 1-5:

1- Photovoltaic blades;

2 - rotating device;

3- Opening and closing limit parts;

4 - sliding bar;

5-limit shaft;

6- external interface device;

7- Communication system and control system;

8- Energy storage subsystem;

9- Dual-axis tracking system;

10-blade arrangement.

Detailed ways

The core of the present invention is to provide a blade device to prolong the service life of the photovoltaic power generation system. Another core of the present invention is to provide a photovoltaic power generation system including the above blade device. Another core of the present invention is to provide a photovoltaic power generation control method.

In order to enable those skilled in the art to better understand the technical solutions of the present invention, the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments.

Please refer to Figure 1 to Figure 4.

In a specific embodiment, the blade device provided by the specific embodiment of the present invention includes a blade assembly and a blade driving device, the blade assembly includes a plurality of coaxially arranged photovoltaic blades 1, and the blade driving device drives the photovoltaic blade 1 to rotate coaxially Expand.

The blade driving device includes a rotating device 2 and an opening and closing transmission device that connects two adjacent photovoltaic blades 1 to transmit power, and the photovoltaic blade 1 at the end is fixedly connected to the rotating output end of the rotating device 2 . Specifically, the rotating device 2 is preferably a DC motor. In order to prevent rainwater from damaging the rotating device 2 , preferably, the rotating device 2 is located below the bottommost photovoltaic blade 1 .

When the photovoltaic power generation system is working normally, the photovoltaic blade 1 is in the unfolded state. When the external environment affects the photovoltaic blade 1, the rotation device 2 drives the photovoltaic blade 1 to rotate, and the adjacent photovoltaic blades 1 are linked by the opening and closing transmission device, and finally realize the photovoltaic blade. 1 fold. When the photovoltaic blade 1 needs to be unfolded, the rotating device 2 drives the photovoltaic blade 1 to rotate in reverse, and the adjacent photovoltaic blades 1 are linked by the opening and closing transmission device, and finally all the photovoltaic blades 1 are in the unfolded state.

In a specific embodiment, the opening and closing transmission device includes a sliding rod 4 , a limiting shaft 5 and an opening and closing limiting member 3 arranged on opposite sides of the photovoltaic blade 1 . The opening and closing limiter 3 is provided with a chute for accommodating the ends of the sliding rod 4, one end of the sliding rod 4 is hinged with the limit shaft 5, and the other end is located in the chute, and the chute is provided with a chute for limiting the sliding rod 4. Rotating blade folded abutment position and blade unfolded abutment position, when the slide bar 4 rotated to the blade folded abutment position and blade unfolded abutment position, the slide bar 4 stopped rotating. 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 along the stacking direction of the photovoltaic blade 1 . The blade folding abutment position and blade unfolding abutment position of the chute provided on the photovoltaic blade 1 at the second end are respectively provided with a first limit switch and a second limit switch. Specifically, the opening and closing limiter 3 can Installed on the outer surface of the photovoltaic blade 1 , or embedded in the photovoltaic blade 1 .

In a specific working process, the DC motor is used to provide power, and the output shaft of the DC motor drives the opening and closing transmission device to open and close the first group of photovoltaic blades. The first limit switch with the maximum closing degree is located in the chute The top end, the second limit switch of the maximum expansion degree is located at the contact point of the chute at the position when the opening and closing limiter 3 is locked. When the photovoltaic blade 1 rotates to the specified position, the opening and closing limit member 3 will touch the first limit switch or the second limit switch and send the limit signal to the control device, so that the control device controls the DC motor through the drive circuit stop running.

In a specific implementation, the uppermost one of the group of photovoltaic blades 1 can be used as a fixed blade, which is fixed and rigidly connected to the output shaft of the DC motor, and when the rotation shaft of the DC motor rotates, it follows the rotation, and passes through with the next photovoltaic blade. The opening and closing transmission device coupled between the blades 1 drives it to retract; the bottom photovoltaic blade 1 is directly connected to the DC motor shell body to provide a fixed reference position when the photovoltaic blade 1 is closed; except for the uppermost and the rest of the photovoltaic blades 1 at the bottom are all movable blades and are not rigidly connected to the DC motor, so as to follow the photovoltaic blades 1 on the upper layer to perform opening and closing movement. The linkage effect between the photovoltaic blades 1 is realized by the limitation and rotation between the sliding rods 4 on the front of two adjacent photovoltaic blades 1 and the chute on the back.

In order to improve the installation stability, preferably, the photovoltaic power generation system further includes a support shaft, the photovoltaic blade 1 is connected to the support shaft through the opening and closing limiter 3, the opening and closing limiter 3 is sleeved on the support shaft, and the photovoltaic blade 1 is The axis directions of the supporting shafts are stacked one after the other.

In order to improve power generation efficiency, preferably, the limit shaft 5 is located on the light-facing surface of the photovoltaic blade 1, and the opening and closing limit member 3 is located on the backlight surface of the photovoltaic blade 1. Due to the small volume of the limit shaft 5, it is arranged on the photovoltaic blade 1. The light-facing surface reduces the impact on the power generation working area of the photovoltaic blade 1.

In a specific embodiment, preferably, the opening and closing limiting member 3 is a supporting member of the photovoltaic blade 1 , and the two ends of the opening and closing limiting member 3 extend to both ends of the photovoltaic blade 1 in the length direction. On the one hand, the opening and closing limiter 3 provides a chute, and on the other hand, it facilitates the support of the photovoltaic blade 1 and improves the support stability of the photovoltaic blade 1 .

In order to reduce the labor intensity of staff, the photovoltaic power generation system also includes a control device for controlling the work of the blade driving device. Specifically, the control device automatically unfolds and stacks the photovoltaic modules according to the detected environment.

In the blade device provided by this application, a plurality of photovoltaic blades 1 are sequentially arranged in dislocations to form an overall receiving plane for sunlight. The axial thickness is beneficial to save system use and storage space and take into account the aesthetic effect.

In this application, the simple mechanical structure of the sliding rod 4 and the chute can not only realize the functional requirements of the linkage opening and closing between the photovoltaic blades 1, but also because its position is located on the back of the photovoltaic blade 1, and the surface faces downward during operation, which can effectively avoid outdoor dust The accumulation of dirt such as sand and gravel avoids the failure of the folding mechanism, and the operation effect is stable and reliable.

At the same time, the connection form of the sliding rod 4 and the chute also enhances the rigid connection effect between the photovoltaic blades 1, which is beneficial to prolong the service life of the system.

This application can increase the blade drive device on the basis of the original two-axis tracking system 9, and adopt a simple and practical form of opening and closing transmission device, and use the space of the support structure on the back of the blade to design the position of the chute, making full use of equipment materials and simplifying The design complexity is conducive to saving system investment costs, reducing system design costs, and facilitating widespread promotion and use.

A photovoltaic power generation system provided in the present application includes any blade device 10 described above. The specific structure of the vane device 10 has been described above, and the present application includes the aforementioned vane device 10 , which also has the above-mentioned technical effects.

As shown in FIG. 5 , in a specific embodiment, the photovoltaic power generation system also includes an integrated energy storage subsystem 8 , a dual-axis tracking system 9 , a communication system, a control system and an external interface device 6 . Preferably, the vane device 10 is also integrated.

The energy storage subsystem includes energy storage batteries and DC/DC converters. The energy storage battery is mainly used to balance the difference between the real-time output of the distributed photovoltaic power generation system and the external demand, and play a role in smoothing the output; at the same time, a stable bus voltage is provided through the DC/DC converter, thereby ensuring that the system includes wireless communication. Stable power supply for modules, controllers, drive circuits and other links when on/off grid.

The function of the dual-axis tracking system 9 is consistent with that of the traditional photovoltaic dual-axis tracking system 9 , providing rotation of the inclination angle and azimuth angle of the photovoltaic blade 1 , thereby increasing the power generation of photovoltaics.

Communication system and control system mainly include wireless communication module, controller and drive circuit. Among them, the wireless communication module is used to receive remote manual control signals, and send the status information of the system to the power station control center when necessary, and the controller is responsible for receiving manual control signals or automatic control algorithms entered in advance. , to provide driving instructions such as controlling biaxial tracking, partial tracking and partial folding and opening of the photovoltaic subsystem, and then provide driving signals to the corresponding DC motors for operation through the driving circuit.

The external interface device 6 includes an AC interface, an AC/DC bidirectional converter and a DC interface. Among them, the AC interface is used to connect an external single-phase or three-phase AC cable when connecting to the grid, and its coupling with the internal DC bus of the system is realized through an AC/DC bidirectional converter. The DC interface is used to connect with the outside in the DC system.

For specific integration settings, the designed dual-axis tracking distributed photovoltaic power generation system includes a blade device 10, an energy storage subsystem 8, a dual-axis tracking system 9, a communication system, a control system, and an external interface. Coupling in the form of connection, the functions of each part are clearly divided, and the overall operation effect is smooth;

In the specific wiring, each part is directly coupled in the form of mechanical or electrical connection, the functions of each part are clearly divided, and the overall operation effect is smooth; at the same time, the internal energy storage system is used to balance the real-time output of the distributed photovoltaic power generation system and the external The difference in demand plays a role in smoothing the output; at the same time, a stable bus voltage is provided through the DC/DC converter, thereby ensuring the stability of the system, including wireless communication modules, controllers, drive circuits, etc. Power supply improves the application range and adaptability of the system in distributed scenarios.

A photovoltaic power generation control method provided by the present application includes receiving a starting signal; when receiving the starting signal, controlling the blade device 10 to start working, wherein the rotating device 2 can be manually controlled to work, or the rotating device 2 can be automatically controlled to work through preset conditions . The vane device 10 is any one of the vane devices 10 described above. The specific structure of the vane device 10 has been described above, and the present application includes the aforementioned vane device 10 , which also has the above-mentioned technical effects.

Specifically, the photovoltaic power generation control method, including whether to execute the automatic start logic;

If so, execute the autostart logic.

If not, execute the manual start switch.

Specifically, the automatic start logic includes: collecting real-time environmental data, checking whether the standard is met, and if so, the blade driving device drives the blade assembly to expand.

If not, the blade device 10 is on standby, and the photovoltaic blade 1 is in a folded position at this time.

The real-time environmental data includes primary index and secondary index. The primary index includes wind speed and/or temperature and/or precipitation. The secondary index is light. When the primary index reaches the standard, it is judged whether the secondary index is up to standard. After reaching the standard, the blade driving device drives the blade assembly to expand.

Specifically, if the primary index does not meet the standard, the vane device is on standby and does not act. At this time, the vane device is on standby, which means that the vane device does not perform the opening and closing action of the vane assembly. If the secondary index does not meet the standard, the blade driving device drives the blade assembly to fold.

It can also automatically judge that the illumination does not meet the standard, and control the photovoltaic blade 1 to move to the folded position.

When the switch is manually activated, the photovoltaic blade 1 can be selected to switch between the folded and unfolded positions as required.

Regarding the timing selection of the opening and closing of the photovoltaic blade 1, if the optional method of automatic control or manual control is adopted, the workload of manual adjustment and control can be reduced under normal conditions, and the timing of blade expansion and retraction can be intelligently selected independently as the environment changes. Protect the photovoltaic blade 1 from being damaged by external bad weather such as strong wind, and can also collect and convert solar power to the greatest extent. At the same time, through a reasonable shape design, it maintains its coordination and beauty with the environment.

Specifically, executing the manual drive switch includes polling the manual control command, judging whether the drive switch executes the blade assembly deployment signal, if so, the blade control device 10 controls the blade drive device to perform the deployment action of the photovoltaic blade 1; if not, judges whether the drive switch executes the blade If the assembly is folded, the blade drive device drives the blade assembly to fold, if not, the blade control device 10 controls the blade drive device to stand by and not act, and the blade device standby means that the blade device does not perform the opening and closing action of the blade assembly.

Specifically, when the above photovoltaic blades are deployed and rotated, until the sliding rod 4 rotates to the abutting position of blade deployment, the second limit switch at the deployed position is triggered, and the sliding rod 4 stops rotating.

As above, when the photovoltaic blades are folded and rotated until, when the sliding rod 4 rotates to the folded abutment position of the blades, the first limit switch of the folded position is triggered, and the sliding rod 4 stops rotating.

Each embodiment in this specification is described in a progressive manner, each embodiment focuses on the difference from other embodiments, and the same and similar parts of each embodiment can be referred to each other.

The above description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the invention. Therefore, the present invention will not 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 (15)

1. A vane device, characterized in that it comprises: A blade assembly, the blade assembly includes a plurality of coaxially arranged photovoltaic blades (1); and a blade driving device that drives the photovoltaic blade (1) to rotate coaxially to fold and unfold, the blade driving device includes a rotating device (2) and an opening and closing transmission that connects two adjacent photovoltaic blades (1) to transmit power device, the photovoltaic blade (1) at the first end is fixedly connected to the rotating output end of the rotating device (2); The opening and closing transmission device includes a sliding rod (4), a limit shaft (5) and an opening and closing limiter (3) arranged on opposite sides of the photovoltaic blade (1), and the opening and closing limiter ( 3) There is a chute for accommodating the end of the sliding rod (4), one end of the sliding rod (4) is hinged to the limit shaft (5), and the other end is located in the chute, so The chute is provided with a blade folding contact position and a blade expansion contact position for limiting the rotation of the sliding rod (4). When the sliding rod (4) rotates to the blade folding contact position and blade deployment contact position When in position, the sliding rod (4) stops rotating, and the opening and closing limiter (3) is the supporting member of the photovoltaic blade (1); The photovoltaic blade (1) located at the second end is fixed relative to the housing of the rotating device (2), and the sliding slot provided on the photovoltaic blade (1) located at the second end The blade folding abutment position and the blade unfolding abutment position are respectively provided with a first limit switch and a second limit switch, and the first end and the second end are the The opposite ends of the photovoltaic blades (1) in the stacking direction. 2. The blade device according to claim 1, further comprising a support shaft, the photovoltaic blade (1) is connected to the support shaft through the opening and closing limiter (3), the opening and closing The stopper (3) is sheathed on the support shaft, and the photovoltaic blades (1) are stacked sequentially along the axis direction of the support shaft. 3. The blade device according to claim 1, characterized in that, the limiting shaft (5) is located on the light-facing surface of the photovoltaic blade (1), and the opening and closing limiting member (3) is located on the The backlight surface of the photovoltaic blade (1). 4. The blade device according to claim 1, characterized in that, both ends of the opening and closing limiter (3) extend to both ends of the lengthwise direction of the photovoltaic blade (1). 5 . The blade device according to claim 1 , wherein the rotating device ( 2 ) is located below the photovoltaic blade ( 1 ), and is fixedly connected to the photovoltaic blade ( 1 ) at the bottom end. 6. The blade device according to claim 1, further comprising a control device for controlling the operation of the blade driving device. 7. The blade device according to claim 1, characterized in that, the rotating device (2) is a DC motor. 8. A photovoltaic power generation system, characterized by comprising the blade device (10) according to any one of claims 1-7. 9. The photovoltaic power generation system according to claim 8, characterized in that it further comprises an integrated energy storage subsystem (8), a biaxial tracking system (9), a communication system, a control system and an external interface device (6). 10. A photovoltaic power generation control method, characterized in that it includes receiving a starting signal; when receiving the starting signal, controlling the blade device (10) to start working; the blade device (10) is the The vane device (10) according to any one. 11. The photovoltaic power generation control method according to claim 10, characterized in that whether to execute the automatic start logic; If so, execute the autostart logic; If not, execute the manual start switch. 12 . The photovoltaic power generation control method according to claim 11 , wherein the automatic start-up logic includes: collecting real-time environmental data, checking whether the standard is met, and if yes, the blade driving device drives the blade assembly to unfold. 13 . 13. The photovoltaic power generation control method according to claim 12, characterized in that, the real-time environmental data includes a primary index and a secondary index, the primary index includes wind speed and/or temperature and/or precipitation, and the secondary index includes The index is light, and when the primary index is up to standard, it is judged whether the secondary index is up to standard, and when both the primary index and the secondary index are up to standard, the blade driving device drives the blade assembly to unfold. 14. The photovoltaic power generation control method according to claim 13, characterized in that, if the primary index does not meet the standard, the blade device (10) is on standby and does not operate; if the secondary index does not reach the standard, the The blade driving device drives the blade assembly to fold. 15. The photovoltaic power generation control method according to claim 11, characterized in that, the execution of the manual drive switch includes polling manual control instructions, judging whether the drive switch executes the deployment of the blade assembly, and if so, the blade control device controls The blade driving device performs the unfolding action of the photovoltaic blade (1); if not, judge whether the drive switch executes the folding of the blade assembly, if yes, the blade driving device drives the blade assembly to fold, if not, the The blade control device controls the blade drive device to stand by and not act.

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