Photoelectric conversion system of space solar power station ground demonstration verification platform

Abstract

The application discloses a photoelectric conversion system of a ground demonstration and verification platform of a space solar power station, comprising a photovoltaic array, a plurality of photovoltaic optimizers and a converging module; wherein the photovoltaic array is laid on a substrate outside a feeder for collecting concentrated solar energy; the substrate comprises eight basic units in the circumference of the feeder, each basic unit is spliced by four trapezoidal substrates of different sizes, the photovoltaic array comprises a plurality of series-parallel combinations, each series-parallel combination comprises one long string or a plurality of long strings in parallel with each other, the long string comprises a plurality of battery strings in series, and each battery string is formed by a plurality of photovoltaic cell pieces in series; the photovoltaic optimizer is used for maximum power tracking of the series-parallel combination; and the converging module is used for converging the outputs of the plurality of photovoltaic optimizers. The application solves the problem of low conversion efficiency caused by non-uniform longitudinal light intensity by unitizing the substrate.

Description

Technical Field

[0001] This invention belongs to the field of photoelectric conversion technology, specifically relating to a photoelectric conversion system for a ground demonstration and verification platform for a space solar power station. Background Technology

[0002] The ground-based demonstration platform for a space-based solar power station is primarily used to verify the concept of converting solar energy into electrical energy and transmitting it back to Earth via microwave. In the photovoltaic conversion section, a photovoltaic optimizer is used to achieve maximum power point tracking (MPPT) for the series-parallel combination of photovoltaic cells. When local shading occurs, it may get stuck at a local maximum power point. While numerous artificial intelligence algorithms exist to determine whether this is the global maximum operating point, they are not easily implemented by engineers. Furthermore, when the overall solar power level is low, the power difference between adjacent operating points is small. If the detection accuracy is insufficient, existing voltage perturbation algorithms may deviate from the operating point.

[0003] Since the output power of a single photovoltaic optimizer is not high, the various optimizers need to be combined before outputting. Because the optimizers output constant power, when the power consumption of the downstream stage is low, the voltage at the combiner point will rise sharply. Summary of the Invention

[0004] To address the aforementioned problems in the existing technology, this invention provides a photoelectric conversion system for a ground-based demonstration and verification platform for a space-based solar power station. The technical problem to be solved by this invention is achieved through the following technical solution:

[0005] This invention provides a photoelectric conversion system for a ground-based demonstration and verification platform for a space-based solar power station, comprising: a photovoltaic array, multiple photovoltaic optimizers, and a convergence module; wherein,

[0006] The photovoltaic array is laid on a substrate outside the feed source to collect concentrated solar energy. The substrate includes eight basic units located around the feed source. Each basic unit is spliced ​​together from four trapezoidal substrates of different sizes. The photovoltaic array includes multiple series-parallel combinations. Each series-parallel combination includes a long string or multiple long strings connected in parallel. The long string includes multiple series-connected cell strings. Each cell string is formed by multiple photovoltaic cells connected in series.

[0007] The photovoltaic optimizer is used to perform maximum power point tracking on the series-parallel combination;

[0008] The aggregation module is used to combine the outputs of the multiple photovoltaic optimizers.

[0009] In one embodiment of the present invention, four trapezoidal substrates of different sizes in each basic unit are spliced ​​together along a first direction, the first direction being the direction of the height of the trapezoidal substrate;

[0010] In the first direction, the trapezoidal substrate includes multiple partitions of the same height.

[0011] In one embodiment of the present invention, in each trapezoidal substrate, the photovoltaic cells in the same partition have the same area, while the photovoltaic cells in different partitions have different areas.

[0012] In one embodiment of the present invention, the partition includes at least one rectangular photovoltaic cell and two irregularly shaped photovoltaic cells, wherein the two irregularly shaped photovoltaic cells are located at opposite ends of the partition, and the at least one rectangular photovoltaic cell is arranged between the two irregularly shaped photovoltaic cells along a second direction, the second direction being perpendicular to the first direction.

[0013] In one embodiment of the present invention, in each series-parallel combination, the number of photovoltaic cells contained in the long string is equal and the photovoltaic cells in the same long string are all located on the same trapezoidal substrate.

[0014] In one embodiment of the present invention, the plurality of photovoltaic optimizers are respectively connected to the output terminals of the plurality of series-parallel combinations, and the photovoltaic optimizer includes: a main control module, a data acquisition module, a PWM module, and a boost converter module; wherein...

[0015] The PWM module is used to amplify the amplitude of the PWM signal generated by the main control module.

[0016] The data acquisition module is used to acquire the input current, input voltage, and output voltage of the photovoltaic optimizer.

[0017] The main control module is used to generate PWM signals based on the tracking algorithm, the input current, the input voltage, and the output voltage;

[0018] The Boost module is used to adjust the equivalent load impedance of the corresponding series-parallel combination based on the amplified PWM signal.

[0019] In one embodiment of the present invention, the output of the photovoltaic optimizer is:

[0020]

[0021] Among them, V in V represents the input voltage of the photovoltaic optimizer. out This represents the output voltage of the photovoltaic optimizer, and D represents the duty cycle of the PWM signal.

[0022] In one embodiment of the present invention, a protection circuit is also included;

[0023] The protection circuit is used to limit voltage at the junction of multiple photovoltaic optimizers using an electronic load.

[0024] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0025] This invention provides a photoelectric conversion system for a ground demonstration and verification platform for a space solar power station, comprising: a photovoltaic array, multiple photovoltaic optimizers and a convergence module. The photovoltaic array is laid on a substrate outside the feed source. The substrate includes eight basic units located around the feed source. Each basic unit is composed of four trapezoidal substrates of different sizes. By modularizing the substrate, this invention solves the problem of low conversion efficiency caused by uneven longitudinal light intensity.

[0026] Furthermore, this invention can prevent series and parallel combinations from getting stuck in local maximum power points through timed global scanning, which is easy to implement in engineering and can ensure high tracking efficiency and accuracy even when photovoltaic power is low, thus reducing the requirements for detection accuracy.

[0027] The present invention will be further described in detail below with reference to the accompanying drawings and embodiments. Attached Figure Description

[0028] Figure 1 This is a schematic diagram of a basic unit provided in an embodiment of the present invention;

[0029] Figure 2 This is a schematic diagram of the photoelectric conversion system of the ground demonstration and verification platform for a space solar power station provided in an embodiment of the present invention;

[0030] Figure 3 This is a schematic diagram of a trapezoidal substrate provided in an embodiment of the present invention;

[0031] Figure 4 This is a schematic diagram of another structure of the trapezoidal substrate provided in an embodiment of the present invention;

[0032] Figure 5 This is a schematic diagram of another structure of the trapezoidal substrate provided in an embodiment of the present invention;

[0033] Figure 6 This is a schematic diagram of another structure of the trapezoidal substrate provided in an embodiment of the present invention;

[0034] Figure 7 This is a schematic diagram of the structure of the photovoltaic optimizer provided in an embodiment of the present invention;

[0035] Figure 8 This is a flowchart of a tracking algorithm provided in an embodiment of the present invention;

[0036] Figure 9 This is a schematic diagram of a secondary determination rule provided in an embodiment of the present invention;

[0037] Figure 10 This is a schematic diagram of the electronic load discharge unit provided in an embodiment of the present invention. Detailed Implementation

[0038] The present invention will be further described in detail below with reference to specific embodiments, but the implementation of the present invention is not limited thereto.

[0039] Figure 1 This is a schematic diagram of a basic unit provided in an embodiment of the present invention. Figure 2 This is a schematic diagram of the photoelectric conversion system of the ground demonstration and verification platform for a space-based solar power station provided in an embodiment of the present invention. Please refer to... Figure 1-2 This invention provides a photoelectric conversion system for a ground-based demonstration and verification platform for a space-based solar power station, comprising: a photovoltaic array, multiple photovoltaic optimizers, and a convergence module; wherein,

[0040] The photovoltaic array is laid on a substrate outside the feed source to collect concentrated solar energy. The substrate includes eight basic units located around the feed source. Each basic unit is spliced ​​together from four trapezoidal substrates 10 of different sizes. The photovoltaic array includes multiple series-parallel combinations. Each series-parallel combination includes at least one long string. The long string includes multiple series-connected cell strings. Each cell string is formed by multiple photovoltaic cells connected in series.

[0041] Photovoltaic optimizers are used for maximum power point tracking of series-parallel combinations;

[0042] The aggregation module is used to combine the outputs of multiple photovoltaic optimizers.

[0043] It should be understood that in a photoelectric conversion system, a concentrator can focus solar energy and reflect it onto a feed source. The feed source is located in the center of the concentrator and its circumference consists of eight identical basic units. Each basic unit (hereinafter referred to as an eighth-order feed source) is composed of four trapezoidal substrates 10 of different sizes spliced ​​together. Specifically, as shown... Figure 1 As shown, in each basic unit, four trapezoidal substrates 10 of different sizes are spliced ​​together along a first direction, which is the direction of the height of the trapezoidal substrate 10; that is, in Figure 1 From the perspective shown, four trapezoidal substrates 10 are spliced ​​together in the longitudinal direction to form a basic unit.

[0044] Figure 3-6 This is a schematic diagram of a trapezoidal substrate provided in an embodiment of the present invention. Optionally, as shown... Figure 3-6 As shown, in the first direction, the trapezoidal substrate 10 includes a plurality of partitions of the same height;

[0045] In each trapezoidal substrate 10, the photovoltaic cells in the same zone have the same area, while the photovoltaic cells in different zones have different areas.

[0046] During the research process, the inventors discovered that due to the irregular shape of the four trapezoidal substrates 10 and the non-uniformity of light concentration, the longitudinal light intensity varies greatly. If a large number of rectangular photovoltaic cells of the same size are laid on each trapezoidal substrate 10, the cell coverage rate will be very low. Moreover, the difference in concentration ratio will lead to a large difference in the output current of the cells, making it difficult to form a cell string. Furthermore, the parallel connection of a large number of cells with different output currents and voltages will bring additional losses, which is also not conducive to forming a series-parallel combination.

[0047] In this embodiment, each trapezoidal substrate 10 is divided into multiple partitions in the longitudinal direction, each partition has the same height, and the photovoltaic cells in the same partition of each trapezoidal substrate 10 have the same area.

[0048] The aforementioned partition includes at least one rectangular photovoltaic cell 20 and two irregularly shaped photovoltaic cells 30, wherein the two irregularly shaped photovoltaic cells 30 are located at opposite ends of the partition, and at least one rectangular photovoltaic cell 20 is arranged between the two irregularly shaped photovoltaic cells 30 along a second direction, which is perpendicular to the first direction.

[0049] Specifically, please see Figure 3-6 Trapezoidal substrates 101, 102, 103, and 104 include 4, 5, 6, and 7 sections, respectively. Within the same trapezoidal substrate 10, the spacing between adjacent sections is 3–5 mm. Each section uses photovoltaic cells of the same area, and the two ends of each section are irregularly shaped photovoltaic cells. The spacing between adjacent photovoltaic cells within the same section is 1 mm. This design helps reduce the number of photovoltaic cells within each section, effectively increasing the photovoltaic cell coverage ratio on the substrate.

[0050] Optionally, the photovoltaic cells in different sections of each trapezoidal substrate 10 have different areas to compensate for the differences in the light concentration ratio of each section of the trapezoidal substrate 10, thereby ensuring that the output current of each cell on the trapezoidal substrate 10 is similar, which makes it easy to connect the cells in different sections in series to form a battery string.

[0051] Specifically, a certain number of photovoltaic cells located in different sections within the same trapezoidal substrate 10 can be connected in series to form a cell string, denoted as xy, where x is the sequence number of the trapezoidal substrate 10 and y is the sequence number of the cell string on the trapezoidal substrate 10. Please continue to the next section. Figure 1-6Taking the photovoltaic cells partitioned and distributed within trapezoidal substrates 101, 102, 103, and 104 as an example, trapezoidal substrate 101 is connected in series to form two cell strings: 1-1 and 1-2; trapezoidal substrate 102 is connected in series to form four cell strings: 2-1, 2-2, 2-3, and 2-4; trapezoidal substrate 103 is connected in series to form four cell strings: 3-1, 3-2, 3-3, and 3-4; and trapezoidal substrate 104 is connected in series to form four cell strings: 4-1, 4-2, 4-3, and 4-4. Further, two cell strings within the same trapezoidal substrate 10 are connected in series to form a long string, and then long strings with similar voltages are connected in parallel to form a series-parallel combination. Please refer to [link to relevant documentation]. Figure 6 Battery strings 2-1 and 2-3, 2-2 and 2-4, 1-1 and 1-2, 3-1 and 3-3, 3-2 and 3-4, 4-1 and 4-4, and 4-2 and 4-3 are connected in series to form long strings 1, 2, 3, 4, 5, 6, and 7, respectively. For example, long strings 2 and 3 are connected in parallel, long strings 4 and 5 are connected in parallel, and long strings 6 and 7 are connected in series, thus obtaining 4 series-parallel combinations. After all battery strings are connected in parallel, four sets of outputs are formed. Since the number of photovoltaic cells contained in each long string is equal in each series-parallel combination, it is beneficial to reduce the loss when connected in parallel.

[0052] It should be noted that the long string formed by battery strings 2-1 and 2-3 does not need to be connected in parallel with other long strings, so it can be used as a series-parallel combination on its own. In addition, in other embodiments of the present invention, the battery strings, long strings and series-parallel combinations can also be designed in other ways, which are not limited in this application.

[0053] Figure 7 This is a schematic diagram of the photovoltaic optimizer provided in an embodiment of the present invention. Figure 7 As shown, multiple photovoltaic optimizers are connected to the output terminals of multiple series-parallel combinations, and each photovoltaic optimizer includes: a main control module, a data acquisition module, a PWM module, and a boost converter module; wherein,

[0054] The PWM module is used to amplify the amplitude of the PWM signal generated by the main control module.

[0055] The data acquisition module is used to acquire the input current, input voltage, and output voltage of the photovoltaic optimizer.

[0056] The main control module is used to generate PWM signals based on the tracking algorithm, input current, input voltage, and output voltage.

[0057] The Boost module is used to adjust the equivalent load impedance of the corresponding series-parallel combination based on the amplified PWM signal.

[0058] In this embodiment, each series-parallel combination tracks the maximum power through a corresponding optimizer. During operation, software protection can be implemented through the acquisition module. Specifically, the acquisition module includes a first acquisition module and a second acquisition module. The first acquisition module is used to acquire the input current and input voltage of the photovoltaic optimizer, and the second acquisition module is used to acquire the output voltage of the photovoltaic optimizer. The main control module determines whether the input / output voltage of the photovoltaic optimizer is overvoltage or whether the input current is overcurrent based on these power data. When overvoltage or overcurrent occurs, the main control module shuts off the output of the series-parallel combination through the PWM module.

[0059] Optionally, the photovoltaic optimizer adopts a Boost converter topology, and the relationship between its input voltage and output voltage is shown in the following equation:

[0060]

[0061] Among them, V in V represents the input voltage of the photovoltaic optimizer. out This represents the output voltage of the photovoltaic optimizer, and D represents the duty cycle of the PWM signal.

[0062] Figure 8 This is a flowchart of a tracking algorithm provided in an embodiment of the present invention. Figure 9 This is a schematic diagram of a secondary determination rule provided in an embodiment of the present invention. The tracking algorithm used by the photovoltaic optimizer includes an improved global scanning algorithm and a dynamic voltage perturbation algorithm. For details, please refer to... Figure 8 The improved global scanning algorithm is as follows: a global scan is performed every T minutes, that is, the operating point is quickly moved from the current maximum operating point to an operating point of about 10V every T minutes, and the corresponding current I is collected. s and quickly return to the original work point; put I s With the original operating point current I c Comparison:

[0063] When equation (1) is satisfied, the corresponding flag is set and global scanning begins. The duty cycle of the PWM signal is stepped by 3% and the step time interval is 1s until the input voltage of the photovoltaic optimizer drops below 10V. Within this range, the global maximum power point is determined.

[0064]

[0065] If equation (1) is not satisfied, it means that the current operating point is still the global maximum power point, and the disturbance will continue to bend around the current operating point.

[0066] After determining the approximate location of the maximum power point through global scanning, dynamic perturbation is required to bring the actual operating point closer to the maximum power point and to continuously perturb it to its left and right.

[0067] Furthermore, the dynamic voltage perturbation algorithm is as follows:

[0068] During the perturbation process, when the input power of the photovoltaic optimizer (i.e., the output power of the corresponding series-parallel combination of the photovoltaic optimizer) remains unchanged or increases, the perturbation direction is the same as the previous one. When the power decreases, the perturbation direction is opposite to the previous one. Simultaneously, during the perturbation process, it can be dynamically determined whether the current operating point has shifted. For example, after each perturbation, the current power is compared with the currently tracked maximum power. If the current power is lower than 96% of the currently tracked maximum power, the perturbation returns to the currently tracked maximum power and begins in reverse.

[0069] When the output power level of the series-parallel combination is low and close to the maximum power point, or when the output power level of the series-parallel combination is low and the duty cycle step of the PWM signal is small, the power difference between adjacent components is small. In this case, the direction of the disturbance can still be determined using the secondary determination method. Specifically, when the power suddenly decreases (the previous power increased, and this time the power decreased), it remains in the same direction, and the secondary determination flag is set. If the secondary flag is already set, the direction of the disturbance is further determined. Figure 8 As shown, the direction of the next disturbance is determined based on 4 data points and 3 disturbance directions.

[0070] When multiple photovoltaic optimizers are connected in parallel, V out Changes will not affect the tracking of the maximum operating point; each photovoltaic optimizer only needs to adjust its duty cycle in real time. in It can move normally or stabilize at a certain maximum operating point. The output voltage of the photovoltaic optimizer is determined by external factors, so the four photovoltaic optimizers are directly connected in parallel for output.

[0071] Optionally, the photoelectric conversion system of the aforementioned ground demonstration and verification platform for space solar power stations also includes a protection circuit;

[0072] The protection circuit is used to limit voltage at the junction of multiple photovoltaic optimizers using electronic loads.

[0073] When external environmental factors such as light intensity and temperature change little and the photovoltaic optimizer can track the maximum power point, the photovoltaic optimizer can be considered to be outputting constant power. When the consumption of the downstream stage is low, the voltage at the combiner point rises sharply. Therefore, a protection circuit is needed to consume the excess power.

[0074] Figure 10 This is a schematic diagram of the electronic load discharge unit provided in an embodiment of the present invention. Specifically, this embodiment uses an electronic load as a voltage limiting protection for the bus point, and the electronic load discharge unit is as follows: Figure 6As shown, when the output voltage of multiple photovoltaic optimizers connected in parallel exceeds 28V, comparator U1A outputs a high level, turning on MOSFET Q1. Discharge resistors CR1 and CR2 begin to consume power, and the current increases rapidly. When the current flowing through CR1 and CR2 exceeds 2A, comparator U1B outputs a low level, turning on diode D2. Comparator U1A then outputs a low level, turning off MOSFET Q1. The current flowing through CR1 and CR2 decreases, and D2 turns off. This process repeats.

[0075] As can be seen from the above embodiments, the beneficial effects of the present invention are as follows:

[0076] This invention provides a photoelectric conversion system for a ground demonstration and verification platform for a space solar power station, comprising: a photovoltaic array, multiple photovoltaic optimizers and a convergence module. The photovoltaic array is laid on a substrate outside the feed source. The substrate includes eight basic units located around the feed source. Each basic unit is composed of four trapezoidal substrates of different sizes. By modularizing the substrate, this invention solves the problem of low conversion efficiency caused by uneven longitudinal light intensity.

[0077] Furthermore, this invention can prevent series and parallel combinations from getting stuck in local maximum power points through timed global scanning, which is easy to implement in engineering and can ensure high tracking efficiency and accuracy even when photovoltaic power is low, thus reducing the requirements for detection accuracy.

[0078] In the description of this invention, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this invention.

[0079] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this invention, "a plurality of" means two or more, unless otherwise explicitly specified.

[0080] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of the invention. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. In addition, those skilled in the art can combine and integrate the different embodiments or examples described in this specification.

[0081] Although this application has been described herein in conjunction with various embodiments, those skilled in the art, by reviewing the accompanying drawings, disclosure, and appended claims, will understand and implement other variations of the disclosed embodiments in carrying out the claimed application. While certain measures are recited in different dependent claims, this does not mean that these measures cannot be combined to produce good results.

[0082] The above description, in conjunction with specific preferred embodiments, provides a further detailed explanation of the present invention. It should not be construed that the specific implementation of the present invention is limited to these descriptions. For those skilled in the art, various simple deductions or substitutions can be made without departing from the concept of the present invention, and all such modifications and substitutions should be considered within the scope of protection of the present invention.

Claims

1. A photoelectric conversion system of a space solar power plant ground demonstration verification platform, characterized in that, The application relates to a photovoltaic array, a plurality of photovoltaic optimizers and a convergence module; wherein, The photovoltaic array is laid on a substrate outside a feeder for collecting concentrated solar energy; the substrate comprises eight basic units in the circumferential direction of the feeder, each of the basic units is spliced by four trapezoidal substrates of different sizes, the photovoltaic array comprises a plurality of series-parallel combinations, each series-parallel combination comprises one long string or a plurality of long strings in parallel with each other, and the long string comprises a plurality of cell strings in series, and each cell string is formed by a plurality of photovoltaic cell pieces in series; The photovoltaic optimizer is used for maximum power tracking of the series-parallel combination; The convergence module is used for converging the outputs of the plurality of photovoltaic optimizers; The four trapezoidal substrates of different sizes in each basic unit are spliced in a first direction, and the first direction is the height direction of the trapezoidal substrate; in the first direction, the trapezoidal substrate comprises a plurality of partitions with the same height; In each trapezoidal substrate, the photovoltaic cell pieces in the same partition have the same area, and the photovoltaic cell pieces in different partitions have different areas; The partition comprises at least one rectangular photovoltaic cell piece and two special-shaped photovoltaic cell pieces, wherein the two special-shaped photovoltaic cell pieces are located at two ends of the partition respectively, and the at least one rectangular photovoltaic cell piece is arranged between the two special-shaped photovoltaic cell pieces in a second direction perpendicular to the first direction. In each series-parallel combination, the number of the photovoltaic cell pieces contained in the long string is equal, and the photovoltaic cell pieces in the same long string are located on the same trapezoidal substrate.

2. The photoelectric conversion system of the ground demonstration and verification platform of the space solar power plant according to claim 1, characterized in that, The plurality of photovoltaic optimizers are respectively connected with output ends of the plurality of series-parallel combinations, and the photovoltaic optimizer comprises a master control module, an acquisition module, a PWM module and a Boost voltage boosting module; wherein, 3. The photovoltaic conversion system of the ground demonstration and validation platform for spatial solar power plants according to claim 1, characterized in that, The PWM module is used for amplifying the amplitude of the PWM signal generated by the master control module; The acquisition module is used for acquiring the input current, input voltage and output voltage of the photovoltaic optimizer; The master control module is used for generating a PWM signal according to a tracking algorithm, the input current, input voltage and output voltage; The Boost voltage boosting module is used for adjusting the equivalent load impedance of the corresponding series-parallel combination according to the amplified PWM signal. The output of the photovoltaic optimizer is:

4. The photovoltaic conversion system of the ground demonstration and validation platform for spatial solar power plants according to claim 3, characterized in that, The protection circuit is used for limiting voltage by an electronic load at the convergence point of the plurality of photovoltaic optimizers. wherein, V in represents the input voltage of the photovoltaic optimizer, V out represents the output voltage of the photovoltaic optimizer, D represents the duty cycle of the PWM signal.

5. The photovoltaic conversion system of the ground demonstration and validation platform for spatial solar power plants according to claim 1, characterized in that, ​ ​

Images