A modular trough light collector and its structural optimization method

Abstract

The present invention discloses a modular trough light collector and a structural optimization method thereof, comprising a main support structure, a thin film concentrator, a photovoltaic cell array and a power transmission device; the main support structure is a concave arc frame structure, two end reinforcement trusses are arranged at both ends of the main support structure, and the free ends of the two end reinforcement trusses intersect at the axis of the main support structure; a plurality of thin film concentrator arrays are arranged on the inner wall of the main support structure; the photovoltaic cell array is located in the concave area of ​​the main support structure, the photovoltaic cell array includes a plurality of photovoltaic cell panel units, and the plurality of photovoltaic cell panel units are arranged to form a total cell array, and there is an angle between adjacent rows of photovoltaic cell panel units, so that the cross section of the total cell array is a curve; the power transmission device is coaxially connected between the end of the photovoltaic cell array and the free end of the end reinforcement truss. The light collector of the present invention has high light collection efficiency, realizes light collection and conversion at the same time, makes the system easy to expand, and reduces the difficulty of processing and manufacturing.

Description

Technical Field

[0001] The invention belongs to the field of solar energy and relates to a modular trough-type light collector and a structure optimization method thereof. Background Art

[0002] Although solar energy has the advantages of being clean, environmentally friendly and renewable, there are many problems in its use. The use of solar energy is limited by sunshine conditions. Areas with sufficient sunshine are more suitable for solar energy use. It is also affected by factors such as weather and environment. The ground light collection efficiency is poor. The energy density of solar energy is low, and a larger area of ​​solar energy equipment is required to collect and convert energy. Larger equipment means that the processing and manufacturing are more difficult and the expansion capacity is limited. The intermittent and unstable nature of ground solar power generation makes energy storage a challenge. As the scale of photovoltaic solar cell arrays laid on the ground increases, the construction investment cost also increases. Summary of the invention

[0003] The purpose of the present invention is to overcome the shortcomings of the above-mentioned prior art and provide a modular trough-type light collector and a structural optimization method thereof, which has high light collection efficiency and realizes light collection and conversion at the same time, making the system easy to expand while reducing the difficulty of processing and manufacturing.

[0004] In order to achieve the above object, the present invention adopts the following technical solutions:

[0005] A modular trough light collector includes a main support structure, a thin film concentrator, a photovoltaic cell array and a power transmission device;

[0006] The main support structure is an inwardly concave arc-shaped frame structure, and two end reinforcement trusses are arranged at both ends of the main support structure, and the free ends of the two end reinforcement trusses intersect at the axis of the main support structure; multiple thin film condenser arrays are arranged on the inner wall of the main support structure;

[0007] The photovoltaic cell array is located in the concave area of ​​the main support structure. The photovoltaic cell array includes a plurality of photovoltaic cell panel units. The plurality of photovoltaic cell panel units are arranged to form a total cell array. There are angles between adjacent rows of photovoltaic cell panel units, so that the cross section of the total cell array is a curve.

[0008] The power transmission device is coaxially connected between the end of the photovoltaic cell array and the free end of the end reinforcement truss of the main supporting structure.

[0009] Preferably, ground supports are respectively provided on the outer sides of both ends of the main supporting structure, and support columns are provided on the top of the ground supports. The support columns are connected to the end truss rotating shaft through the end truss rotating bearing, the end of the end truss rotating shaft is fixedly connected to the free end of the end reinforcement truss, the end truss rotating shaft is connected to the center position of the angle turntable, and the angle turntable is connected to the main transmission device;.

[0010] Furthermore, the end truss rotating shaft is a hollow shaft, with a transverse shaft connected to it via a bearing. One end of the transverse shaft passes through the free end of the end reinforcement truss and is fixedly connected to the stator end of the conductive slip ring of the conductive slip ring, and the other end of the transverse shaft is connected to a second motor.

[0011] Preferably, the main supporting structure includes annular trusses, axial trusses, end trusses and end reinforcement trusses. The annular trusses are arc-shaped structures. Multiple annular trusses are arranged at intervals along the axial direction. The axial trusses are vertically connected to the annular trusses. Multiple axial trusses are arranged at intervals in the circumferential direction. The end trusses at both ends are parallel to the annular trusses. The two end trusses are respectively connected to the two ends of the axial truss, and the inside of the end trusses is connected to two end reinforcement trusses.

[0012] Preferably, the film condenser comprises a film fixing frame and a reflective film, the film fixing frame is hollow inside, the inner wall is grooved, and the reflective film is embedded in the inner groove.

[0013] Furthermore, a long strip through hole is provided on the top of the film fixing frame, and the length of the long strip through hole is the same as the length of the reflective film. Fixing buckles are provided on both sides of the top of the film fixing frame. The two fixing buckles cover both ends of the through hole, and the two fixing buckles are connected to the film fixing frame with fixing bolts.

[0014] Furthermore, connecting shafts are arranged at the center positions of both ends of the film fixing frame, and the connecting shafts between adjacent condenser mirror units in the same row are connected through couplings.

[0015] Preferably, the power transmission equipment includes a conductive slip ring and a main transmission cable, the photovoltaic cell array is coaxially connected to the conductive slip ring, the conductive slip ring includes a conductive slip ring rotor end and a conductive slip ring stator end, the power output end of the photovoltaic cell array is connected to the conductive slip ring rotor end, and the conductive slip ring stator end is connected to the main transmission cable.

[0016] Preferably, the photovoltaic cell array comprises a photovoltaic cell panel unit, a transverse fixing rod, a longitudinal fixing rod, and a sub-block cable connection; a plurality of transverse fixing rods and a longitudinal fixing rod form a frame structure, a plurality of photovoltaic cell panel units are fixed by the transverse fixing rods and the longitudinal fixing rods to form a cell array sub-block; a sub-block cable connection is provided on the photovoltaic cell panel unit; a plurality of photovoltaic cell panel units are arranged to form a total cell array, and photovoltaic cell panel units are laid on both the front and back sides of the total cell array;

[0017] A battery array hanger is provided at each end of the total battery array. The total battery array is fixed at the bottom of the battery array hanger. The tops of the two battery array hangers are connected by a main shaft, and the ends of the main shaft are connected to the power transmission equipment.

[0018] A method for optimizing the structure of the modular trough light collector comprises the following steps:

[0019] S1. Establish a geometric description of the generatrix of the trough-type light collector and approximate the generatrix of the light collector surface with a regular polygon;

[0020] S2, using B-spline curve to describe the busbar shape of the total battery array;

[0021] S3, using a ray tracing algorithm to simulate the reflection of line-focused light;

[0022] S4. According to the theorem of geometric optics, the distribution of reflected light on the total cell array in the light collector is obtained;

[0023] S5, construct a structural optimization model;

[0024] S6. Using the particle swarm algorithm, find the optimal light collection efficiency η c The coordinates of the B-spline curve control points and the number of polygon segments N under different weights with the optimal power-to-quality ratio, where the coordinates of the B-spline curve control points correspond to the coordinates of the total battery array curve control points; the number of polygon segments N corresponds to the number of reflective film segments of the light collector;

[0025] S7. According to the coordinates of the control points of the B-spline curve and the number of polygon segments, the total battery array curvature and the number of reflective films in the circumferential direction are respectively set.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] The present invention adopts a modular design concept. The thin film concentrator and photovoltaic cell array are composed of multiple groups of modules. They can collect and convert light at the same time, making the system easy to expand and reducing the difficulty of processing and manufacturing. The modular design allows the components of the concentrator to be processed and manufactured in batches, and the modules can be replaced with each other, thereby reducing the subsequent maintenance cost; at the same time, it avoids the problem of single point failure, and the damage of a single photovoltaic cell array unit does not affect the overall use; the modular design improves the overall scalability of the device, and the light collection efficiency can be improved by simply adding new modules. The light collection mechanism adopts two-dimensional line focusing, and the focusing system is axisymmetric, with high light collection efficiency and small fluctuations.

[0028] Furthermore, the photovoltaic cell array and the thin film concentrator adopt a single degree of freedom rotation strategy. The single degree of freedom adjustment mechanism is relatively stable and reliable, does not require complex control and algorithms, reduces the possibility of system failure, and improves the stability and reliability of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0030] Figure 2 The present invention Figure 1 Schematic diagram of the main support structure in FIG.

[0031] Figure 3 The present invention Figure 1 Schematic diagram of the thin film condenser in;

[0032] Figure 4 The present invention Figure 1 Schematic diagram of photovoltaic array in;

[0033] Figure 5 The present invention Figure 1 Schematic diagram of power transmission equipment in;

[0034] Figure 6 The present invention Figure 1 Schematic diagram of the attitude adjustment system towards Japan;

[0035] Figure 7 The busbar shape diagram of the light collector of the present invention;

[0036] Figure 8 The reflection condition of the line-focused light and the distribution diagram of the reflected light of the present invention;

[0037] Fig. 9 A schematic diagram of the receiving surface morphology of the present invention;

[0038] Fig.10 A graph showing the relationship between the light receiving efficiency and the number of busbar segments of the present invention.

[0039] Meaning of the reference numerals in the figures:

[0040] 1. Main support structure; 2. Thin-film concentrator; 3. Photovoltaic cell array; 4. Power transmission equipment; 5. Sun attitude adjustment system; 101. Annular truss; 102. Axial truss; 103. End truss; 104. End reinforcement truss; 201. Thin-film fixing frame; 202. Reflective film; 203. Connecting shaft; 204. Coupling; 205. Fixing bolt; 206. Fixing buckle; 301. Photovoltaic cell panel unit; 302. Horizontal fixing rod; 303. Longitudinal fixing rod; 304 Sub-block cable connection; 305. Cell array hanger; 401. Conductive slip ring rotor end; 402. Conductive slip ring stator end; 403. Main transmission cable; 501. Main transmission device; 502. Support column; 503. End truss rotating bearing; 504. End truss rotating shaft; 505. Ground support; 506. Horizontal axis; 507. Angle turntable. DETAILED DESCRIPTION

[0041] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments; based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0042] It should be noted that the words "front", "rear", "left", "right", "up" and "down" used in the following description refer to directions in the drawings, and the words "inside" and "outside" refer to directions toward or away from the geometric center of a specific component, respectively.

[0043] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those generally understood by those skilled in the art of the present invention. The terms used herein in the specification of the present invention are only for the purpose of describing specific embodiments and are not intended to limit the present invention. The term "and / or" used herein includes any and all combinations of one or more related listed items.

[0044] Reference Figure 1 , which is the modular trough light collector described in the present invention, includes a main support structure 1, a thin film concentrator 2, a photovoltaic cell array 3, a power transmission device 4 and a solar attitude adjustment system 5.

[0045] The main support structure 1 is a concave arc-shaped frame structure, a plurality of thin-film concentrators 2 are arranged in an array on the inner wall of the main support structure 1 , and the photovoltaic cell array 3 is located in the concave area of ​​the main support structure 1 .

[0046] Reference Figure 2 , the main support structure 1 plays the role of supporting multiple groups of thin film condensers. It includes an annular truss 101, an axial truss 102, an end truss 103 and an end reinforcement truss 104. The annular truss 101 is an arc-shaped structure. Multiple annular trusses 101 are arranged at intervals along the axial direction. The annular truss 101 mainly fixes the thin film condenser 2. There are multiple mounting holes evenly distributed on the annular truss 101. The axial truss 102 is vertically connected to the annular truss 101. Multiple axial trusses 102 are arranged at intervals in the circumferential direction, and mainly play the role of fixing the annular truss 101. The end trusses 103 at both ends are parallel to the annular truss 101. The two end trusses 103 are respectively connected to the two ends of the axial truss 102. The inside of the end truss 103 is connected to two end reinforcement trusses 104. The two end reinforcement trusses 104 are arranged at 120 degrees, and the free ends of the two end reinforcement trusses 104 intersect at the axis of the main support structure 1.

[0047] The annular trusses 101 and the axial trusses 102 are arranged alternately to form a frame structure, and a thin film condenser 2 is arranged in each frame.

[0048] Reference Figure 3 The film condenser 2 is composed of a film fixing frame 201, a reflecting film 202, a connecting shaft 203, a coupling 204, a fixing bolt 205 and a fixing buckle 206.

[0049] The film fixing frame 201 is hollow inside, with grooves on the inner wall, and the reflective film 202 is embedded in the inner groove. A long strip through hole is set on the top of the film fixing frame 201. The length of the long strip through hole is the same as that of the reflective film 202. The reflective film 202 can be inserted or pulled out through the through hole; fixed buckles 206 are set on both sides of the top of the film fixing frame 201. The two fixed buckles 206 block the two ends of the through hole. The two fixed buckles 206 are connected to the film fixing frame 201 by fixing bolts 205. The installed reflective film 202 is fixed by the fixed buckles 206; the connecting shafts 203 are set at the center positions of the two ends of the film fixing frame 201. The connecting shafts 203 between the adjacent condenser units in a row are connected by a coupling 204. The coupling 204 is inserted into the mounting hole of the annular truss 101. A row of film condensers connected by the coupling 204 synchronously maintains the focusing posture. .

[0050] Reference Figure 4 The photovoltaic cell array 3 is composed of a photovoltaic cell panel unit 301 , a transverse fixing rod 302 , a longitudinal fixing rod 303 , a sub-block cable connection 304 and a cell array hanger 305 .

[0051] A plurality of transverse fixing rods 302 and longitudinal fixing rods 303 form a frame structure, and a plurality of photovoltaic panel units 301 are fixed by the transverse fixing rods 302 and longitudinal fixing rods 303 to form a battery array sub-block; sub-block cable connections 304 are reserved on the photovoltaic panel units 301 to facilitate wiring between battery array sub-blocks; a plurality of photovoltaic panel units 301 are arranged to form a total battery array, and there is an angle between adjacent rows of photovoltaic panel units 301, so that the cross-section of the total battery array is a curve.

[0052] A battery array hanger 305 is provided at each end of the total battery array. The total battery array is fixed at the bottom of the battery array hanger 305. The tops of the two battery array hangers 305 are connected by a main shaft so that the total battery array is located directly below the axis of the main support structure 1. Photovoltaic panel units 301 are laid on the front and back sides of the total battery array.

[0053] Reference Figure 5The power transmission device 4 is coaxially connected between the main shaft end of the photovoltaic cell array 3 and the free end of the end reinforcement truss 104 of the main support structure 1. The power transmission device 4 is composed of a conductive slip ring and a total transmission cable 403. The conductive slip ring includes a conductive slip ring rotor end 401 and a conductive slip ring stator end 402. The sub-block cable connection 304 of the photovoltaic cell array 3 is connected to the conductive slip ring rotor end 401, and the conductive slip ring rotor end 401 transmits the output DC power to the conductive slip ring stator end 402; the conductive slip ring stator end 402 is connected to the total transmission cable 403. The conductive slip ring rotates coaxially with the photovoltaic cell array 3, and the conductive slip ring realizes the function of power transmission and avoids the problem of cable entanglement during rotation.

[0054] Reference Figure 6 The sun attitude adjustment system 5 consists of a main transmission device 501, a support column 502, an end truss rotating bearing 503, an end truss rotating shaft 504, a ground support 505, a horizontal axis 506 and an angle turntable 507.

[0055] Ground supports 505 are respectively arranged on the outer sides of both ends of the main supporting structure 1, and support columns 502 are arranged on the top of the ground supports 505. The support columns 502 are connected to the end truss rotating shaft 504 through the end truss rotating bearing 503. The end of the end truss rotating shaft 504 is fixedly connected to the free end of the end reinforcing truss 104. The end truss rotating shaft 504 is connected to the center position of the angle turntable 507, and the angle turntable 507 is connected to the main transmission device 501.

[0056] The main transmission device 501 includes two first motors and a reduction gear, and the output end of the first motor is connected to the angle turntable 507 through the reduction gear.

[0057] The end truss rotating shaft 504 is a hollow shaft, and a horizontal shaft 506 is connected to the inside through a bearing. One end of the horizontal shaft 506 passes through the free end of the end reinforcement truss 104 and is fixedly connected to the conductive slip ring stator end 402 of the conductive slip ring. The other end of the horizontal shaft 506 is connected to a second motor. The second motor housing is fixed on the support column 502, and the second motor output shaft is connected to the end of the horizontal shaft 506.

[0058] The main transmission device 501 drives the angle turntable 507 to rotate, thereby driving the entire concentrator system to rotate, controlling the initial adjustment of the film concentrator 2's attitude towards the sun, and driving the horizontal axis 506 to rotate through the second motor, thereby driving the photovoltaic cell array 3 to track the film concentrator 2, and looking for the position of maximum light energy density, thereby realizing the function of the photovoltaic cell array 3 to capture the maximum amount of sunlight.

[0059] Here’s how it works:

[0060] When sunlight is incident at different altitude angles, the main support structure 1 carrying multiple groups of thin-film concentrators 2 performs single-degree-of-freedom rotation and focusing through the posture adjustment system 5, keeping the incident light incident vertically; the photovoltaic cell array 3 tracks the thin-film concentrator 2 to reach the specified position; the photovoltaic cell array 3 converts the reflected light into direct current through photoelectric conversion; the direct current is collected and transmitted through the conductive slip ring rotor end 401, the conductive slip ring stator end 402 and the transmission cable 403.

[0061] In order to achieve the best light collection efficiency, the present application optimizes the structure of the light collector, such as Fig.10 As shown, specifically, the curve of the total battery array in the light collector and the number of segments of the reflective film 202 are calculated to obtain the optimal value, which specifically includes the following process:

[0062] like Figure 7 As shown, a geometric description of the generatrix of the trough-type light collector is established, and the generatrix of the light collector surface is approximated by regular polygons.

[0063] The B-spline curve is used to describe the busbar shape of the total battery array.

[0064] like Figure 8 As shown, the ray tracing algorithm is used to simulate the reflection of line-focused light.

[0065] like Fig. 9 As shown, according to the theorem of geometric optics, the distribution of reflected light on the total cell array in the light collector is obtained.

[0066] The generatrix geometry of the annular trough light collector can be described by the following equation:

[0067] x 2 +(yR 0 ) 2 =R 0 2

[0068] Among them, R 0 is the radius of the light collector cross section.

[0069] The surface is approximated by a plane and decomposed into a series of small plane segments. In the two-dimensional cross-section, the vertex coordinates approximated by regular polygons can be described as follows:

[0070]

[0071] Where N is the number of sides of the polygon and i is the number of the vertices of the polygon.

[0072] The stitching error can be expressed as:

[0073]

[0074] The form of a B-spline curve is as follows:

[0075]

[0076] Where P(u) is the point on the curve, n is the number of control points, p is the order of the curve, and N i,p (u) is the B-spline basis function, P i are the coordinates of each control point.

[0077] Construct a structural optimization model.

[0078] By optimizing the coordinates of the control points of the B-spline curve, the following optimization model is established:

[0079] FINDP=(x 0 ,x 1 ,…,x n ,x 0 ,y 0 ,y 1 ,…,y n , N) T

[0080] MAXf(P)=α 1 f 1 +α 2 f 2

[0081] STσ c (P)-σ max ≤0

[0082] C L <C i (P)≤C U

[0083]

[0084] Among them, η c is the collection efficiency of the light collector, σ max is the maximum value of the uniformity of optical concentration ratio distribution, C i is the optical concentration ratio, C L , C U are the lower and upper limits of the optical concentration ratio, U is the feasible domain of the control point coordinates, N represents the number of segments of the main reflection surface, and f 1 is the normalized power-to-mass ratio of the light collector, f 2 is the normalized light collection efficiency η c , α 1 , α 2 is the weight coefficient, α 1 +α 2 =1.

[0085] Using ray tracing method, η cIt can be calculated by the following formula:

[0086]

[0087] Among them, A i is the area of ​​each statistical partition of the battery array, M is the number of partitions, C i The calculation formula is:

[0088]

[0089] (5c) The energy density q of each partition i It can be expressed as:

[0090]

[0091] Among them, N i is the amount of sunlight reflected to each partition, e i,j is the power of a single beam of sunlight, defined as:

[0092]

[0093] A r Represents the area of ​​sunlight irradiating the light collector aperture surface, N inc The number of sampled sunlight.

[0094] When N is a constant, take α 1 =0,α 2 =1, the optimization model is a single-objective single-variable optimization model, the variables are the coordinates of the control points of the B-spline curve, and the objective function is the normalized light collection rate η c When N is taken as different values, the particle swarm algorithm is used to solve the optimal light collection efficiency η c The coordinates of the control points of the B-spline curve when N is a variable, α 1 , α 2 When both are not 0, the optimization model is a multi-objective multi-variable optimization model, the variables are the coordinates of the B-spline curve control points and the number of polygon segments N, and the objective function is the normalized light collection rate η c and normalized power-to-weight ratio, and use the particle swarm algorithm to solve the optimal light collection efficiency η c The coordinates of the B-spline curve control points and the number of polygon segments N under different weights with the optimal power-to-quality ratio. The coordinates of the B-spline curve control points correspond to the coordinates of the total battery array curve control points; the number of polygon segments N corresponds to the number of segments of the reflective film 202 of the light collector.

[0095] The total battery array arc and the number of reflective films 202 in the circumferential direction are set respectively according to the coordinates of the B-spline curve control points and the number of polygon segments.

[0096] It should be noted that, in this article, relational terms such as first and second, etc. are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variants thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements includes not only those elements, but also other elements not explicitly listed, or also includes elements inherent to such process, method, article or device.

[0097] It should be understood that the above description is for illustration and not for limitation. Many embodiments and many applications beyond the examples provided will be apparent to those skilled in the art upon reading the above description. Therefore, the scope of the present teachings should not be determined with reference to the above description, but rather with reference to the foregoing claims and the full scope of equivalents to which such claims are entitled. For the purpose of comprehensiveness, all articles and references, including disclosures of patent applications and publications, are incorporated herein by reference. The omission of any aspect of the subject matter disclosed herein in the foregoing claims is not intended to be a waiver of such subject matter, nor should it be considered that the applicant has not considered such subject matter to be part of the disclosed inventive subject matter.

Claims

1. A modular trough light collector, characterized in that: It comprises a main supporting structure (1), a thin film concentrator (2), a photovoltaic cell array (3) and a power transmission device (4); The main support structure (1) is an inwardly concave arc-shaped frame structure, and two end reinforcement trusses (104) are arranged at both ends of the main support structure (1), and the free ends of the two end reinforcement trusses (104) intersect at the axis of the main support structure (1); a plurality of thin film condensers (2) are arranged in an array on the inner wall of the main support structure (1); The photovoltaic cell array (3) is located in the concave area of ​​the main support structure (1), the photovoltaic cell array (3) comprises a plurality of photovoltaic cell panel units (301), the plurality of photovoltaic cell panel units (301) are arranged in a row to form a total cell array, and there is an angle between adjacent rows of photovoltaic cell panel units (301), so that the cross section of the total cell array is a curve; The power transmission device (4) is coaxially connected between the end of the photovoltaic cell array (3) and the free end of the end reinforcement truss (104) of the main support structure (1); The main support structure (1) comprises an annular truss (101), an axial truss (102), an end truss (103) and an end reinforcement truss (104); the annular truss (101) is an arc-shaped structure; a plurality of annular trusses (101) are arranged at intervals along the axial direction; the axial truss (102) is vertically connected to the annular truss (101); a plurality of axial trusses (102) are arranged at intervals in the circumferential direction; the end trusses (103) at both ends are parallel to the annular truss (101); the two end trusses (103) are respectively connected to the two ends of the axial truss (102); and the inside of the end truss (103) is connected to two end reinforcement trusses (104); The film condenser (2) comprises a film fixing frame (201) and a reflective film (202); the film fixing frame (201) is hollow inside, has an inner wall with grooves, and the reflective film (202) is embedded in the inner grooves; A long strip through hole is provided on the top of the film fixing frame (201), the length of the long strip through hole being the same as the length of the reflective film (202), fixing buckles (206) are provided on both sides of the top of the film fixing frame (201), the two fixing buckles (206) cover the two ends of the through hole, and the two fixing buckles (206) are connected to the film fixing frame (201) by fixing bolts (205); Connecting shafts (203) are provided at the center positions of both ends of the film fixing frame (201), and the connecting shafts (203) between adjacent condenser mirror units in the same row are connected via a coupling (204); The photovoltaic cell array (3) comprises a photovoltaic cell panel unit (301), a transverse fixing rod (302), a longitudinal fixing rod (303), and a sub-block cable connection (304); a plurality of transverse fixing rods (302) and a longitudinal fixing rod (303) form a frame structure, and a plurality of photovoltaic cell panel units (301) are fixed by the transverse fixing rods (302) and the longitudinal fixing rods (303) to form a cell array sub-block; a sub-block cable connection (304) is provided on the photovoltaic cell panel unit (301); a plurality of photovoltaic cell panel units (301) are arranged to form a total cell array, and photovoltaic cell panel units (301) are laid on the front and back sides of the total cell array; A battery array hanger (305) is provided at each end of the total battery array. The total battery array is fixed at the bottom of the battery array hanger (305). The tops of the two battery array hangers (305) are connected by a transverse axis (506), and the ends of the transverse axis (506) are connected to the power transmission equipment (4).

2. The modular trough light collector according to claim 1, characterized in that Ground supports (505) are respectively arranged on the outer sides of both ends of the main support structure (1); a support column (502) is arranged on the top of the ground support (505); the support column (502) is connected to an end truss rotating shaft (504) via an end truss rotating bearing (503); the end of the end truss rotating shaft (504) is fixedly connected to the free end of the end reinforcement truss (104); the end truss rotating shaft (504) is connected to the center position of an angle rotating disk (507); and the angle rotating disk (507) is connected to the main transmission device (501).

3. The modular trough light collector according to claim 2, characterized in that The end truss rotating shaft (504) is a hollow shaft, and a transverse shaft (506) is connected to the inside via a bearing. One end of the transverse shaft (506) passes through the free end of the end reinforcement truss (104) and is fixedly connected to the conductive slip ring stator end (402) of the conductive slip ring, and the other end of the transverse shaft (506) is connected to a second motor.

4. The modular trough light collector according to claim 1, characterized in that The power transmission device (4) comprises a conductive slip ring and a main transmission cable (403); the photovoltaic cell array (3) is coaxially connected to the conductive slip ring; the conductive slip ring comprises a conductive slip ring rotor end (401) and a conductive slip ring stator end (402); the power output end of the photovoltaic cell array (3) is connected to the conductive slip ring rotor end (401); and the conductive slip ring stator end (402) is connected to the main transmission cable (403).

5. A method for optimizing the structure of the modular trough light collector according to any one of claims 1 to 4, characterized in that: The process includes: S1. Establish a geometric description of the generatrix of the trough-type light collector and approximate the generatrix of the light collector surface with a regular polygon; S2, using B-spline curve to describe the busbar shape of the total battery array; S3, using a ray tracing algorithm to simulate the reflection of line-focused light; S4. According to the theorem of geometric optics, the distribution of reflected light on the total cell array in the light collector is obtained; S5, construct a structural optimization model; S6. Use particle swarm algorithm to solve the optimal light collection efficiency B-spline curve control point coordinates and polygon segment number N under different weights with the optimal power-to-mass ratio, wherein the B-spline curve control point coordinates correspond to the total battery array curve control point coordinates; the polygon segment number N corresponds to the number of segments of the reflective film (202) of the light collector; S7, setting the total battery array arc and the number of reflective films (202) in the circumferential direction respectively according to the coordinates of the B-spline curve control points and the number of polygon segments.

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