阅读说明：本技术 一种分布式光伏发电系统及其施工方法 (Distributed photovoltaic power generation system and construction method thereof ) 是由 王欢 张卫容 张钏 杜亚龙 黄仲尼 于 2021-09-15 设计创作，主要内容包括：本发明涉及新能源发电装置技术领域,尤其涉及一种分布式光伏发电系统及其施工方法,分布式光伏发电系统,包括由多个分布式的光伏子阵构成的光伏方阵,每个所述光伏子阵包含多个具有角度调节功能的光伏电池组件,所述光伏电池组件将太阳能转换为直流电,所述直流电经直流汇流箱集中送入逆变器,逆变成交流电后送入箱式变电站,多个所述光伏子阵产生的交流电经箱式变电站升压后进入区域电力控制中心,区域电力控制中心将交流电集中并入电网,同时接受当地电力部门的控制。本发明提供的分布式光伏发电系统并网安全性高,供电能力强,经济效益高,结构稳固,高度和角度调节灵活,环境适应性好,施工效率高。(The invention relates to the technical field of new energy power generation devices, in particular to a distributed photovoltaic power generation system and a construction method thereof. The distributed photovoltaic power generation system provided by the invention has the advantages of high grid-connected safety, strong power supply capability, high economic benefit, stable structure, flexible height and angle adjustment, good environmental adaptability and high construction efficiency.)

1. The utility model provides a distributed photovoltaic power generation system, its characterized in that includes the photovoltaic square matrix that constitutes by a plurality of distributed photovoltaic subarrays, every the photovoltaic subarray contains a plurality of photovoltaic cell assemblies that have angle modulation function, photovoltaic cell assembly converts solar energy into the direct current, the direct current is concentrated through the direct current collection flow box and is sent into the dc-to-ac converter, and after becoming the alternating current by the contravariant, send into box-type transformer substation, a plurality of the alternating current that photovoltaic subarray produced gets into regional power control center after box-type transformer substation boosts, and regional power control center merges the alternating current into the electric wire netting in a concentrated way, accepts local electric power department's control simultaneously.

2. The distributed photovoltaic power generation system according to claim 1, wherein the regional power control center comprises a power collection system, a data analysis and control system and an HMI (human machine interface), wherein the power collection system collects the boosted alternating current of the box-type substation and uniformly incorporates the boosted alternating current into a power grid; the data analysis and control system is respectively connected with the sensor assembly and the electric control system, and the sensor assembly comprises an illumination angle sensor (40), a temperature sensor and an air direction and wind speed sensor which are arranged in the photovoltaic subarray, and a current sensor and a voltage sensor which are arranged in the inverter; the electrical control system is connected with the inverter and the box-type substation; the HMI is respectively connected with the power collection system, the data analysis and control system and the local power department.

3. The photovoltaic power generation system according to claim 2, wherein the photovoltaic cell assembly comprises a photovoltaic cell (10), a photovoltaic support (20) and a junction box (30), the photovoltaic cell (10), the junction box (30) and an illumination angle sensor (40) and a PLC (50) are all installed on the photovoltaic support (20), the illumination angle sensor (40) acquires solar illumination angle data, and the PLC (50) receives data information of the illumination angle sensor (40) and outputs a control signal to the photovoltaic support (20) to adjust an inclination angle of the photovoltaic support (20) so that sunlight vertically irradiates the photovoltaic cell (10).

4. Photovoltaic power generation system according to claim 3, characterized in that the photovoltaic support (20) comprises a photovoltaic cell mounting frame (100) and a front support upright (200) and a rear support upright (300) hinged thereto, the height of the front support upright (200) and the rear support upright (300) being adjustable.

5. The photovoltaic power generation system according to claim 4, wherein the front support column (200) comprises a first upper support column (210) and a first lower support column (220) which are slidably sleeved, the piston (230) forms a buffer structure with the first upper support column (210) and the first lower support column (220), and the locking device (240) locks the relative positions of the first upper support column (210) and the first lower support column (220).

6. The photovoltaic power generation system according to claim 4, wherein the rear support column (300) comprises two telescopic columns (310) and a horizontal rotating shaft (320) arranged between the two telescopic columns (310); the servo motor (370) drives the two telescopic columns (310) to synchronously lift.

7. The photovoltaic power generation system according to claim 4, wherein the longitudinal beam (110) comprises a first short section (111), a second short section (112) and a third short section which can be turned and stacked along the length direction of the longitudinal beam, and the first hinge locking mechanism (400) and the second hinge locking mechanism (500) can lock the extended state and the stacked state of the longitudinal beam (110).

8. The photovoltaic power generation system of claim 7, wherein the first articulated locking mechanism (400) comprises a bending mechanism (410), a sliding track mechanism (420), and a first locking mechanism (430); the bending mechanism (410) is embedded on the upper sides of opposite ends of the first short section (111) and the second short section (112), and the first locking mechanism (430) can slide along the sliding track mechanism (420) and lock the extending state and the stacking state of the first short section (111) and the second short section (112).

9. The photovoltaic power generation system of claim 8, wherein the second articulated locking mechanism (500) comprises an articulated mechanism (510) and a second locking mechanism (520); the hinge mechanism (510) is arranged at the opposite ends of the second short section (112) and the third short section (113), and the second locking mechanism (520) can rotationally lock the extending state and the stacking state of the second short section (112) and the third short section (113).

10. A method of constructing a distributed photovoltaic power generation system according to any one of claims 3 to 9, comprising the steps of:

s100, planning comprehensive and reasonable arrangement of a photovoltaic square matrix, a direct current combiner box, an inverter, a box-type substation and a regional power control center;

s200, installing a photovoltaic square matrix, wherein the photovoltaic square matrix is composed of a plurality of photovoltaic sub-arrays, and the installation of each photovoltaic sub-array comprises the following steps:

s210, fixing a photovoltaic support base on the concrete foundation by adopting a concrete foundation and using expansion bolts or pre-embedded bolts, fixing photovoltaic supports (20) on the photovoltaic support base, wherein a plurality of regularly arranged photovoltaic supports (20) form a supporting structure of a photovoltaic sub-array, and the front photovoltaic support (20) and the rear photovoltaic support (20) are arranged at intervals to ensure that no shielding exists between the front row and the rear row;

s220, installing a junction box (30), an illumination angle sensor (40) and a PLC (programmable logic controller) on the photovoltaic bracket (20);

s230, fixing the photovoltaic cell (10) on a photovoltaic support (20), adjusting the inclination angle of the photovoltaic cell (10) facing the south to ensure that sunlight is vertically incident to the photovoltaic cell (10) through the photovoltaic support (20), and after the photovoltaic cell (10) is fixed, connecting the photovoltaic cell in series and laying a wire;

s240, arranging a temperature sensor and an air direction and wind speed sensor in each photovoltaic sub-array field region;

s300, installing a direct current combiner box corresponding to the photovoltaic sub-array in the planned area, and uniformly connecting and combining the group of serial conductors in each photovoltaic assembly in the direct current combiner box;

s400, installing an inverter, and converting the direct current collected in the corresponding direct current combiner box into alternating current;

s500, building a box-type substation, and boosting the alternating current converted by the corresponding inverter;

s600, setting a regional power control center controlled by a local power department, uniformly merging a plurality of groups of alternating current subjected to voltage boosting by a box-type substation into a power grid, and comprehensively supervising and controlling a sensor assembly and an electrical control system by the regional power control center;

and S700, electrifying and testing after construction is finished, carrying out no-load test operation, and completing and checking after the operation is qualified.

Technical Field

The invention relates to the technical field of new energy power generation devices, in particular to a distributed photovoltaic power generation system and a construction method thereof.

Background

The distributed photovoltaic power generation system is an electric energy system which is built near a user site, is operated in a manner of self-utilization by the user side and surfing the internet with redundant electric quantity, follows the principles of local conditions, cleanness, high efficiency, scattered layout and near utilization, fully utilizes local solar energy resources, and replaces and reduces fossil energy consumption.

The existing distributed photovoltaic power generation system has the following problems: 1. the photovoltaic power generation has the characteristics of intermittence and instability, each distributed photovoltaic power generation unit is small in scale, is independent and dispersed, and cannot be uniformly scheduled, so that excessive power grid access points are generated during grid connection, and irregular and intermittent power impact brings potential safety hazards to a power grid; 2. the light energy conversion efficiency is low, so that the power supply capacity of the distributed photovoltaic power generation system is reduced, and the economic benefit is influenced; 3. the photovoltaic cell assembly is arranged outdoors, is greatly influenced by the external environment, and has poor environmental adaptability in the prior art; 4. the photovoltaic cell module is assembled on site, time and labor are consumed, the problem of structural installation is easy to occur, the installation efficiency is low, and the labor cost is high.

Disclosure of Invention

In order to solve at least one of the above technical problems, the present invention provides a distributed photovoltaic power generation system, including a photovoltaic square matrix formed by a plurality of distributed photovoltaic sub-matrices, each of the photovoltaic sub-matrices includes a plurality of photovoltaic cell assemblies having an angle adjustment function, the photovoltaic cell assemblies convert solar energy into direct current, the direct current is intensively sent to an inverter through a direct current combiner box, the direct current is inverted into alternating current and then sent to a box-type substation, the alternating current generated by the plurality of photovoltaic sub-matrices is boosted by the box-type substation and then enters a regional power control center, and the regional power control center intensively incorporates the alternating current into a power grid and receives control of a local power department.

Preferably, the regional power control center comprises a power collection system, a data analysis and control system and an HMI, wherein the power collection system collects the boosted alternating current of the box-type substation and uniformly merges the boosted alternating current into a power grid; the data analysis and control system is respectively connected with the sensor assembly and the electrical control system, and the sensor assembly comprises an illumination angle sensor, a temperature sensor and an air direction and wind speed sensor which are arranged in the photovoltaic subarray, and a current sensor and a voltage sensor which are arranged in the inverter; the electrical control system is connected with the inverter and the box-type substation; the HMI is respectively connected with the power collection system, the data analysis and control system and the local power department.

Preferably, the photovoltaic cell subassembly includes photovoltaic cell, photovoltaic support and junction box, photovoltaic cell junction box and illumination angle sensor and PLC controller all install in on the photovoltaic support, illumination angle sensor acquires sun illumination angle data, the PLC controller is received illumination angle sensor's data message and to photovoltaic support output control signal adjusts the inclination of photovoltaic support makes the sunlight shine perpendicularly photovoltaic cell.

Preferably, the photovoltaic support comprises a photovoltaic cell installation frame, a front supporting upright post and a rear supporting upright post, wherein the photovoltaic cell installation frame comprises two longitudinal beams, two cross beams fixedly arranged at two ends of the longitudinal beams, and a first cross bar and a second cross bar which are arranged between the two cross beams in parallel; the front supporting upright post is hinged with the first cross rod, and the rear supporting upright post is hinged with the second cross rod; the heights of the front support upright and the rear support upright are adjustable.

Preferably, the front support column comprises a first upper support column and a first lower support column, a sliding cavity with an opening at the top end is arranged in the first lower support column, a guide groove is arranged in the sliding cavity, and the locking device is fixedly arranged on the upper end surface of the first lower support column;

the upper end surface of the first upper supporting column is provided with a first hinge lug, the side wall of the first upper supporting column is vertically provided with a first groove, the bottom of the first upper supporting column is fixedly connected with a piston, the piston slides in the sliding cavity in a sealing manner, the side wall of the first upper supporting column is provided with a guide bulge, the center of the first upper supporting column is provided with a through hole, and the upper end surface of the piston is horizontally provided with a second groove communicated with the through hole and the first groove; the first groove, the second groove, the lower end face of the first upper supporting column and the inner side wall of the first lower supporting column jointly enclose an air passage communicated with the outside, and the cross sectional area of the air passage is smaller than that of the through hole.

Preferably, the rear support upright comprises two telescopic columns and a horizontal rotating shaft arranged between the two telescopic columns; the telescopic column comprises a straight-tube-shaped second upper supporting column and a convex-shaped second lower supporting column, the second upper supporting column is slidably sleeved outside a bulge of the second lower supporting column, a second hinge lug is arranged on the upper end surface of the second upper supporting column, a nut seat is horizontally arranged in the second upper supporting column, a cavity with an upward opening is formed in the second lower supporting column, and a lead screw connecting seat is arranged at the bottom of the cavity; one be equipped with in the cavity with first lead screw and first actuating mechanism that the nut seat links to each other, another be equipped with in the cavity with second lead screw and second actuating mechanism that the nut seat links to each other, first actuating mechanism is including fixed locating first bevel gear on the first lead screw, and locate respectively first bevel gear both sides rather than two bevel gear of meshing, one servo motor is connected to the second bevel gear, another the second bevel gear is connected the one end of horizontal rotating shaft, second actuating mechanism is including locating third bevel gear on the second lead screw with locate third bevel gear one side rather than the fourth bevel gear of meshing, fourth bevel gear connects the other end of horizontal rotating shaft.

Preferably, the longitudinal beam comprises a first short section, a second short section and a third short section which are sequentially hinged along the length direction of the longitudinal beam, the first short section and the third short section can be overturned and stacked to the upper end and the lower end of the second short section, and the first hinged locking mechanism and the second hinged locking mechanism can lock the extending state and the stacking state of the longitudinal beam.

Preferably, the first hinge locking mechanism comprises a bending mechanism, a sliding track mechanism and a first locking mechanism; the bending mechanism is embedded at the upper sides of the opposite ends of the first short section and the second short section, and the sliding track mechanism comprises a first linear track, a second linear track and a first arc-shaped track, wherein the first linear track and the second linear track are arranged along the inner side wall of the longitudinal beam in the length direction, and the first arc-shaped track is communicated with one end of the second linear track; the first linear track is positioned below the bending mechanism and is continuously arranged on the first short section and the second short section, the two ends of the first straight track are respectively provided with a first pin hole and a second pin hole, the second straight track is arranged on the second short section, one end of the first arc track is provided with a third pin hole, the other end of the first arc track is communicated with the first pin hole, the first arc track is continuously arranged on the second short section and the first short section by taking the second pin hole as the circle center in the stacking state, a fourth pin hole is arranged in a first arc-shaped track on the first short section, the first locking mechanism comprises a first mounting seat arranged at the end part of the first cross rod, the first mounting base is provided with a first mounting hole corresponding to the first linear track and a second mounting hole corresponding to the second linear track, and first telescopic pins are fixedly arranged in the first mounting hole and the second mounting hole.

Preferably, the second hinge locking mechanism comprises a hinge mechanism and a second locking mechanism; the hinge mechanism comprises a first disc and a second disc which have equal diameters and are provided with center holes, and opposite ends of the second short section and the third short section are enclosed to form a semicircular arc-shaped curved surface corresponding to the first disc; the first disc is fixedly connected into the arc-shaped curved surface of the second short section, a fifth pin hole is formed in the first disc, the second disc is fixedly connected into the arc-shaped curved surface of the third short section, a semicircular second arc-shaped track is arranged on one side, facing the second cross rod, of the second disc, and a sixth pin hole and a seventh pin hole are formed in two ends of the second arc-shaped track respectively; the second locking mechanism comprises second mounting seats symmetrically arranged at two ends of the second cross rod, third discs with the same diameter as the first discs are fixedly arranged on the second mounting seats, the first discs are positioned between the second discs and the third discs, and the sum of the radial thicknesses of the second discs and the third discs is equal to the width of the longitudinal beam; the third disc is provided with a hinge shaft for connecting the first disc and the second disc and a third mounting hole extending into the second mounting seat, and a second telescopic pin is arranged in the third mounting hole.

The invention provides a construction method of a distributed photovoltaic power generation system, which comprises the following steps:

s100, planning comprehensive and reasonable arrangement of a photovoltaic square matrix, a direct current combiner box, an inverter, a box-type substation and a regional power control center;

s200, installing a photovoltaic square matrix, wherein the photovoltaic square matrix is composed of a plurality of photovoltaic sub-arrays, and the installation of each photovoltaic sub-array comprises the following steps:

s210, fixing a photovoltaic support base on the concrete foundation by adopting a concrete foundation and fixing photovoltaic supports on the photovoltaic support base by using expansion bolts or pre-embedded bolts, wherein a plurality of regularly arranged photovoltaic supports form a supporting structure of a photovoltaic sub-array, and the front photovoltaic support and the rear photovoltaic support are arranged at intervals to ensure that no shielding exists between the front row and the rear row;

s220, mounting a junction box, an illumination angle sensor and a PLC (programmable logic controller) on the photovoltaic bracket;

s230, fixing the photovoltaic cell on a photovoltaic support, wherein the photovoltaic cell faces the south, adjusting the inclination angle through the photovoltaic support to ensure that sunlight is vertically incident to the photovoltaic cell, and after the photovoltaic cell is fixed, performing group series connection and laying a wire;

s240, arranging a temperature sensor and an air direction and wind speed sensor in each photovoltaic sub-array field region;

s300, installing a direct current combiner box corresponding to the photovoltaic sub-array in the planned area, and uniformly connecting and combining the group of serial conductors in each photovoltaic assembly in the direct current combiner box;

s400, installing an inverter, and converting the direct current collected in the corresponding direct current combiner box into alternating current;

s500, building a box-type substation, and boosting the alternating current converted by the corresponding inverter;

s600, setting a regional power control center controlled by a local power department, uniformly merging a plurality of groups of alternating current subjected to voltage boosting by a box-type substation into a power grid, and comprehensively supervising and controlling a sensor assembly and an electrical control system by the regional power control center;

and S700, electrifying and testing after construction is finished, carrying out no-load test operation, and completing and checking after the operation is qualified.

Compared with the prior art, the invention has the following beneficial technical effects:

1. a plurality of small-scale photovoltaic sub-arrays in a certain area range are subjected to centralized scheduling control through an area power control center and are merged into a power grid from a grid-connected point, so that the impact of small-scale photovoltaic sub-arrays and unstable power on the power grid is reduced, and the safety of the power grid is improved;

2. the regional power control center performs data acquisition, analysis and system control, can ensure normal operation of each link of the power generation system, and meanwhile, through detection of the external environment, is beneficial to workers to perform protection operation on each photovoltaic subarray in time, and avoids damage to a photovoltaic cell assembly under extreme weather conditions;

3. the angle of the photovoltaic cell assembly can be automatically adjusted, so that sunlight is guaranteed to vertically irradiate the photovoltaic cell assembly all the time, the power supply capacity of the distributed photovoltaic power generation system is improved, and the economic benefit is improved;

4. the photovoltaic support with the adjustable heights of the front supporting upright post and the rear supporting upright post is adopted, so that the inclination angle of the photovoltaic cell assembly can be adjusted, the photovoltaic cell assembly is ensured to be vertically irradiated by sunlight, the overall height of the photovoltaic cell assembly can be adjusted according to the environment, and the environmental adaptability is improved;

5. the front supporting upright post with the buffering capacity is adopted, so that the photovoltaic cell assembly can slowly fall down when the height is adjusted, and the safety during height adjustment is improved;

6. the rear support upright post controls the two telescopic posts to synchronously lift through a servo motor, the stability of the angle adjustment of the photovoltaic cell assembly is ensured, the structure is compact, the erosion of the external environment to parts can be avoided, and the service life is prolonged;

7. the photovoltaic support which can be stacked and stored is adopted, and the photovoltaic support can be locked in a stretching state and a stacking state, so that the space occupancy rate during storage and transportation is greatly reduced, meanwhile, the photovoltaic support can be quickly installed, and the working efficiency of workers and the accuracy of structural installation are improved;

8. the first cross rod is arranged in a sliding manner, so that the position of the photovoltaic support can be flexibly adjusted when the photovoltaic support is stacked or extended, the requirement for compact structure when the photovoltaic support is stacked and the requirement for supporting the photovoltaic cell when the photovoltaic support is extended are met, the photovoltaic support can be in a required locking state by sliding in the track, the operation is convenient, and the working efficiency is improved;

9. the locking of the stretching or stacking state can be realized by rotating the third short section, the operation is simple and convenient, and the efficiency is high;

in conclusion, the distributed photovoltaic power generation system provided by the invention has the advantages of high grid-connected safety, strong power supply capacity, high economic benefit, stable structure, flexible height and angle adjustment, good environmental adaptability and high construction efficiency.

Drawings

FIG. 1 is a power generation flow diagram of a distributed photovoltaic power generation system;

FIG. 2 is a schematic structural view of a photovoltaic cell module according to the present invention;

FIG. 3 is a schematic structural view of the photovoltaic support of FIG. 2 in an extended state;

FIG. 4 is a schematic structural view of the front support column of FIG. 3;

FIG. 5 is a cross-sectional view A-A of the front support column;

FIG. 6 is a schematic structural view of the rear support column of FIG. 3;

FIG. 7 is an enlarged view of a portion of the first and second drive mechanisms of FIG. 6;

FIG. 8 is a schematic structural view of a first articulation locking mechanism;

FIG. 9 is a schematic structural view of the folding mechanism and the sliding track mechanism in a stacked state;

FIG. 10 is a schematic view of the bending mechanism and the sliding track mechanism in an extended state;

FIG. 11 is a schematic structural view of the first locking mechanism of FIG. 8;

FIG. 12 is a schematic structural view of a second articulation locking mechanism;

FIG. 13 is a schematic structural view of the hinge mechanism of FIG. 12;

FIG. 14 is a schematic structural view of the second locking mechanism of FIG. 12;

fig. 15 is a schematic structural view of a photovoltaic support in a stacked state.

Description of reference numerals:

10. photovoltaic cell, 20, photovoltaic bracket, 30, junction box, 40, illumination angle sensor, 50, PLC controller, 100, photovoltaic cell installation frame, 200, front support column, 300, rear support column, 400, first hinge locking mechanism, 500, second hinge locking mechanism, 110, longitudinal beam, 111, first short section, 112, second short section, 113, third short section, 120, cross beam, 130, first cross beam, 140, second cross beam, 210, first upper support column, 211, first hinge lug, 212, first groove, 220, first lower support column, 221, sliding cavity, 222, guide groove, 230, piston, 231, guide projection, 232, through hole, 233, second groove, 240, locking device, 241, hollow cavity, 242, locking screw, 250, air channel, 310, telescopic column, 311, second upper support column, 312, second lower support column, 313, second hinge lug, 314. a nut seat 315, a cavity 316, a lead screw connecting seat 320, a horizontal rotating shaft 321, a protective shell 330, a first lead screw 340, a first driving mechanism 341, a first bevel gear 342, a second bevel gear 350, a second lead screw 360, a second driving mechanism 361, a third bevel gear 362, a fourth bevel gear 370, a servo motor 410, a bending mechanism 411, a third hinge lug 412, a fourth hinge lug 413, a connecting rod 414, a pivot 420, a sliding track mechanism 421, a first linear track 422, a second linear track 423, a first arc track 424, a first pin hole 424, 425, a second pin hole 426, a third pin hole 427, a fourth pin hole 430, a first locking mechanism 431, a first mounting seat 432, a first mounting hole 433, a second mounting hole 433, a 434, a first window 435, a second window 436, a first telescopic pin, 4361. pin column 4362, spring 437, first handle 510, hinge mechanism 511, first disk 512, second disk 513, fifth pin hole 514, second arc track 515, sixth pin hole 516, seventh pin hole 520, second locking mechanism 521, second mounting seat 522, third disk 523, hinge shaft 524, third mounting hole 525, third window 526, second telescopic pin 527, second handle.

Detailed Description

The following description of the embodiments of the present invention refers to the accompanying drawings and examples:

it should be noted that the structures, proportions, sizes, and other dimensions shown in the drawings and described in the specification are only for the purpose of understanding and reading the present disclosure, and are not intended to limit the scope of the present disclosure, which is defined by the following claims, and all modifications of the structures, changes in the proportions and adjustments of the sizes and other dimensions which are within the scope of the disclosure should be understood and encompassed by the present disclosure without affecting the efficacy and attainment of the same. In addition, the terms "upper", "lower", "left", "right", "middle" and "one" used in the present specification are for clarity of description, and are not intended to limit the scope of the present invention, and the relative relationship between the terms and the terms is not to be construed as a scope of the present invention.

Example 1

With reference to fig. 1 and fig. 2, the present embodiment provides a distributed photovoltaic power generation system, which includes a photovoltaic square matrix formed by a plurality of distributed photovoltaic sub-arrays, each of the photovoltaic sub-arrays includes a plurality of photovoltaic cell assemblies having an angle adjustment function, the photovoltaic cell assemblies convert solar energy into direct current, the direct current is concentrated and sent to an inverter through a direct current combiner box, the direct current is sent to a box-type substation after being inverted into alternating current, the alternating current generated by the plurality of photovoltaic sub-arrays is boosted by the box-type substation and then enters a regional power control center, and the regional power control center concentrates the alternating current into a power grid and receives control of a local power department.

According to the technical scheme, a plurality of small-scale photovoltaic sub-arrays in a certain area range are subjected to centralized scheduling control through the area power control center and are merged into the power grid from a grid-connected point, so that the impact of small-scale photovoltaic sub-array intermittence and unstable power on the power grid is reduced, and the safety of the power grid is improved.

Preferably, the regional power control center comprises a power collection system, a data analysis and control system and an HMI, wherein the power collection system collects the boosted alternating current of the box-type substation and uniformly merges the boosted alternating current into a power grid; the data analysis and control system is respectively connected with a sensor assembly and an electrical control system, and the sensor assembly comprises an illumination angle sensor 40, a temperature sensor, a wind direction and wind speed sensor, a current sensor and a voltage sensor which are arranged in the photovoltaic subarray; the electrical control system is connected with the inverter and the box-type substation; the HMI is respectively connected with the power collection system, the data analysis and control system and the local power department.

In the above technical solution, the power collection system, the data analysis and control system, and the HMI all adopt conventional settings in the prior art, and are not described in detail. The regional power control center carries out data acquisition, analysis and system control, detection data obtained through the sensor assembly and corresponding control instructions are sent according to the obtained data, the electric control system controls the working states of the inverter and the box-type substation, and normal operation of all links of the power generation system can be ensured. Meanwhile, through detection of the external environment, protection operation is timely performed on each photovoltaic subarray by workers, and damage to the photovoltaic cell assembly under extreme weather conditions is avoided.

Preferably, the photovoltaic cell module includes photovoltaic cell 10, photovoltaic support 20 and junction box 30, photovoltaic cell 10 junction box 30 and illumination angle sensor 40 and PLC controller 50 all install in on the photovoltaic support 20, illumination angle sensor 40 acquires sun illumination angle data, PLC controller 50 receives illumination angle sensor 40's data information and to photovoltaic support 20 output control signal, adjustment photovoltaic support 20's inclination makes the sunlight vertical illumination photovoltaic cell 10.

Among the above-mentioned technical scheme, the photovoltaic cell subassembly can carry out angle modulation automatically, guarantees that the sunlight shines the photovoltaic cell subassembly perpendicularly all the time, improves distributed photovoltaic power generation system's power supply ability, improves economic benefits.

Example 2

As shown in fig. 3, the present embodiment provides a technical solution of a photovoltaic support 20, where the photovoltaic support 20 includes a photovoltaic cell installation frame 100, a front support pillar 200, and a rear support pillar 300, where the photovoltaic cell installation frame 100 includes two longitudinal beams 110, two cross beams 120 fixedly disposed at two ends of the longitudinal beams 110, and a first cross bar 130 and a second cross bar 140 disposed between the two cross beams 120 in parallel; the front supporting upright 200 is hinged with the first cross bar 130, and the rear supporting upright 300 is hinged with the second cross bar 140; the heights of the front support mast 200 and the rear support mast 300 are adjustable.

Among the above-mentioned technical scheme, the height of preceding support post 200 and back support post 300 all can be adjusted, both can adjust the inclination of photovoltaic cell subassembly, guarantees the sunlight and shines the photovoltaic cell subassembly perpendicularly, can adjust its whole height according to the environment again, improves environmental suitability. For example, the whole height is reduced in windy days, the wind resistance is improved, and the whole height is increased in snowy days to avoid being buried by snow. The column structure having the height adjustment function in the prior art is applicable to this embodiment.

Example 3

As shown in fig. 4 and fig. 5, the present embodiment provides a technical solution of a front support pillar 200, where the front support pillar 200 includes a first upper support pillar 210 and a first lower support pillar 220, a sliding cavity 221 with an open top end is disposed in the first lower support pillar 220, a guide slot 222 is disposed in the sliding cavity 221, and a locking device 240 is fixedly disposed on an upper end surface of the first lower support pillar 220;

the upper end surface of the first upper support column 210 is provided with a first hinge lug 211, the side wall of the first upper support column is vertically provided with a first groove 212, the bottom of the first upper support column is fixedly connected with a piston 230, the piston 230 slides in the sliding cavity 221 in a sealing manner, the side wall of the first upper support column is provided with a guide bulge 231, the center of the first upper support column is provided with a through hole 232, and the upper end surface of the piston 230 is horizontally provided with a second groove 233 communicated with the through hole 232 and the first groove 212; the first groove 212, the second groove 233, the lower end surface of the first upper support column 210 and the inner side wall of the first lower support column 220 jointly enclose to form an air passage 250 communicated with the outside, and the cross-sectional area of the air passage 250 is smaller than that of the through hole 232.

In the technical scheme, the sliding cavity 221 is sealed by the piston 230, when the piston 230 slides downwards, air in the sliding cavity 221 enters the air channel 250 through the through hole 232, and the diffusion of the air to the outside is blocked due to the gradually decreased air flowing area of the through hole 232 and the air channel 250, so that a buffering force is formed, the photovoltaic cell assembly slowly falls, and the safety during height adjustment is improved.

Example 4

As shown in fig. 6 and 7, the present embodiment provides a technical solution of a rear support pillar 300, where the rear support pillar 300 includes two telescopic pillars 310 and a horizontal rotating shaft 320 disposed between the two telescopic pillars 310; the telescopic column 310 comprises a straight-tube-shaped second upper support column 311 and a convex-shaped second lower support column 312, the second upper support column 311 is slidably sleeved outside the convex part of the second lower support column 312, a second hinge lug 313 is arranged on the upper end surface of the second upper support column, a nut seat 314 is horizontally arranged in the second upper support column, a cavity 315 with an upward opening is arranged in the second lower support column 312, and a lead screw connecting seat 316 is arranged at the bottom of the cavity 315; a first lead screw 330 and a first driving mechanism 340 connected with the nut seat 314 are arranged in one of the cavities 315, a second lead screw 350 and a second driving mechanism 360 connected with the nut seat 314 are arranged in the other cavity 315, the first driving mechanism 340 includes a first bevel gear 341 fixed on the first lead screw 330, and two second bevel gears 342 respectively disposed at both sides of the first bevel gear 341 and engaged therewith, one of the second bevel gears 342 being connected to a servo motor 370, the other of the second bevel gears 342 being connected to one end of the horizontal rotation shaft 320, the second driving mechanism 360 includes a third bevel gear 361 disposed on the second lead screw 350 and a fourth bevel gear 362 disposed on one side of the third bevel gear 361 and engaged with the third bevel gear, and the fourth bevel gear 362 is connected to the other end of the horizontal rotating shaft 320. Preferably, a protective case 321 is disposed outside the horizontal rotation shaft 320 to protect the horizontal rotation shaft 320 from environmental erosion.

In the above technical scheme, the servo motor 370 is controlled by the PLC controller 50, and the first lead screw 330 and the second lead screw 350 can be driven to rotate by one servo motor 370 at the same time, so as to control the two second upper support columns 311 to synchronously lift, thereby ensuring the stability of the angle adjustment of the photovoltaic cell module. First actuating mechanism 340 and second actuating mechanism 360 of back support post 300 all locate telescopic column 310's inside, and compact structure can avoid external environment to the erosion of spare part, prolongs the life of back support post 300.

Example 5

As shown in fig. 3 and 15, this embodiment provides a technical solution of a photovoltaic support 20 with a folding function, where the longitudinal beam 110 includes a first short section 111, a second short section 112, and a third short section 113 hinged in sequence along a length direction thereof, the first short section 111 and the third short section 113 may be folded and stacked to upper and lower ends of the second short section 112, and the first hinge locking mechanism 400 and the second hinge locking mechanism 500 may lock an extended state and a stacked state of the longitudinal beam 110.

Among the above-mentioned technical scheme, referring to fig. 15, photovoltaic support 20 is in the state of stacking, and first articulated locking mechanism 400 and second articulated locking mechanism 500 lock first nipple joint 111, second nipple joint 112 and third nipple joint 113 in this state of stacking respectively, very big reduction photovoltaic support 20's space occupancy, be favorable to photovoltaic support 20's storage and transportation. During the use, refer to fig. 3, expand photovoltaic support 20, first articulated locking mechanism 400 and the articulated locking mechanism 500 of second lock first nipple joint 111, second nipple joint 112 and third nipple joint 113 respectively in this state of extending, and the structure is firm, can realize photovoltaic support 20's quick installation, very big improvement workman's work efficiency and the accuracy of structural mounting. In the related art, structures capable of performing a locking function are applicable to the first and second hinge locking mechanisms 400 and 500 in the present embodiment.

Example 6

As shown in fig. 8 to 11, the present embodiment provides a solution for a first hinge locking mechanism 400, where the first hinge locking mechanism 400 includes a bending mechanism 410, a sliding track mechanism 420, and a first locking mechanism 430; the bending mechanism 410 is embedded at the upper sides of the opposite ends of the first short section 111 and the second short section 112, and the sliding track mechanism 420 comprises a first linear track 421, a second linear track 422 and a first arc-shaped track 423, wherein the first linear track 421 and the second linear track 422 are arranged along the inner side wall of the longitudinal beam 110 in the length direction, and the first arc-shaped track 423 is communicated with one end of the second linear track 422; the first linear track 421 is located below the bending mechanism 410, and is continuously disposed on the first short section 111 and the second short section 112, two ends of the first linear track are respectively provided with a first pin hole 424 and a second pin hole 425, the second linear track 422 is disposed on the second short section 112, one end of the second linear track is provided with a third pin hole 426, the other end of the second linear track is communicated with the first arc track 423, in a stacked state, as shown in fig. 9, the first arc track 423 is continuously disposed on the second short section 112 and the first short section 111 with the second pin hole 425 as a center, the first arc track 423 on the first short section 111 is provided with a fourth pin hole 427, the first locking mechanism 430 comprises a first mounting seat 431 disposed at an end of the first cross bar 130, the first mounting seat 431 is provided with a first mounting hole 432 corresponding to the first linear track 421 and a second mounting hole 433 corresponding to the second linear track 422, a first telescopic pin 436 is fixedly arranged in each of the first mounting hole 432 and the second mounting hole 433.

Among the above-mentioned technical scheme, first horizontal pole 130 can slide in sliding rail mechanism 420, can stack or nimble adjusting position when extending at photovoltaic support 20 on the one hand, satisfies the compact structure demand when stacking and the support demand to photovoltaic cell 10 when extending, and on the other hand can get into required locking state through sliding in the track, convenient operation improves work efficiency.

Bending mechanism 410 may adopt any structure with bending function in the prior art as long as it can satisfy first nipple 111 to be stacked to the upper end face of second nipple 112. High polymer materials with elastic bending performance or elastic metals and the like can be respectively connected to the upper end surfaces of the first short section 111 and the second short section 112 in an embedded mode, the structure is convenient to install, and only one embedded installation groove needs to be formed in the upper end surfaces of the first short section 111 and the second short section 112; a pivot structure as shown in fig. 9 may also be adopted, the pivot structure includes a third hinge lug 411 disposed at one end of first short section 111, a fourth hinge lug 412 disposed at one end of second short section 112, and a link 413 is respectively hinged to third hinge lug 411 and fourth hinge lug 412 through a pivot 414, so that the connection structure is more durable.

In the extended state of the longitudinal beam 110, the first telescopic pin 436 in the first mounting hole 432 and the second mounting hole 433 is inserted into the first pin hole 424 and the third pin hole 426, respectively; in the side member stacked state, the first telescopic pin 436 in the first mounting hole 432 and the second mounting hole 433 is inserted into the second pin hole 425 and the fourth pin hole 427, respectively.

The first retractable pin 436 may have a structure with an elastic retractable function in the prior art, as shown in fig. 11, in this embodiment, a structure in which a positioning pin 4361 and a spring 4362 are connected end to end is adopted, and the structure is simple and compact and is easy to install. The first telescopic pin 436 may be inserted into the first pin hole 424, the second pin hole 425, the third pin hole 426, and the fourth pin hole 427 in a naturally extended state, and when it is necessary to release the first telescopic pin 436 from the pin holes, the first telescopic pin 436 may be pushed from the pin holes using an appropriate bar and compressed away from the pin holes. This embodiment provides a preferable structure for releasing the first telescopic pin 436 more conveniently from the pin hole, as shown in fig. 11, a first handle 437 is disposed on the first telescopic pin 436, a first window 434 communicating with the first mounting hole 432 and a second window 435 communicating with the second mounting hole 433 are disposed on the first mounting seat 431, and the first handle 437 passes through and protrudes out of the first window 434 or the second window 435. By arranging the first handle 437 and the first window 434 and the second window 435, the length of the first telescopic pin 436 can be conveniently and quickly adjusted by pushing the first handle 437.

When the extended state is converted to the stacked state and the locking is performed, the two first telescopic pins 436 are adjusted by the first handle 437 to leave the first pin holes 424 and the third pin holes 426, the first crossbar 130 is pushed toward the second crossbar 140, the two first telescopic pins 436 enter the second pin holes 425 and the first arc-shaped rail 423 along the first sliding rail 421 and the second sliding rail 422, respectively, and at this time, the first crossbar 130 is rotated with the one first telescopic pin 436 inserted into the second pin hole 425 as an axis until the other first telescopic pin 436 enters the fourth pin hole 427 through the first arc-shaped rail 423, thereby completing the locking of the stacked state. The reverse operation is sufficient to change from the stacked state to the extended state.

Example 7

As shown in fig. 12 to 14, this embodiment provides a solution for the second hinge locking mechanism 500, where the second hinge locking mechanism 500 includes a hinge mechanism 510 and a second locking mechanism 520; the hinge mechanism 510 comprises a first disc 511 and a second disc 512 which have the same diameter and are provided with central holes, and opposite ends of the second short section 112 and the third short section 113 are enclosed to form a semicircular arc-shaped curved surface corresponding to the first disc 511; the first disc 511 is fixedly connected to the arc-shaped curved surface of the second short section 112, a fifth pin hole 513 is arranged on the first disc 511, the second disc 512 is fixedly connected to the arc-shaped curved surface of the third short section 113, a semicircular second arc-shaped track 514 is arranged on one side, facing the second cross bar 140, of the second disc 512, and a sixth pin hole 515 and a seventh pin hole 516 are respectively arranged at two ends of the second arc-shaped track 514; the second locking mechanism 520 comprises second mounting seats 521 symmetrically arranged at two ends of the second cross bar 140, third circular discs 522 with the same diameter as the first circular discs 511 are fixedly arranged on the second mounting seats 521, the first circular discs 511 are positioned between the second circular discs 512 and the third circular discs 522, and the sum of the radial thicknesses of the third circular discs is equal to the width of the longitudinal beam 110; the third disc 522 is provided with a hinge shaft 523 for connecting the first disc 511 and the second disc 512, the third disc 522 is provided with a third mounting hole 524 extending into the second mounting seat 521, and the second telescopic pin 526 is arranged in the third mounting hole 524.

In the above-described embodiment, the second telescopic pin 526 has the same structure as the first telescopic pin 436. The release from the pin hole may be performed by any means known in the art, or may be performed by the same preferable structure as in embodiment 6, in which a third window 525 communicating with the third mounting hole 524 is opened on a side wall of the second mounting seat 521, a second handle 527 is provided on a side wall of the second telescopic pin 526, and the second handle 527 passes through and protrudes from the third window 525. The length of the second telescopic pin 526 extending out of the third mounting hole 524 is controlled by the second handle 527, and the third short section 113 is rotated to realize locking of an extending or stacking state, so that the operation is simple and convenient, and the efficiency is high.

When the longitudinal beam 110 is in the extended state, the second telescopic pin 526 is inserted into the sixth pin hole 515 and the fifth pin hole 513 in sequence, and when the longitudinal beam 110 is in the stacked state, the second telescopic pin 526 is inserted into the seventh pin hole 516 and the fifth pin hole 513 in sequence; when the third sub 113 is rotated, the second telescoping pin 526 rotates against the second arcuate track 514.

Example 8

The embodiment provides a construction method of a distributed photovoltaic power generation system, which comprises the following steps:

s100, planning comprehensive and reasonable arrangement of a photovoltaic square matrix, a direct current combiner box, an inverter, a box-type substation and a regional power control center;

s200, installing a photovoltaic square matrix, wherein the photovoltaic square matrix is composed of a plurality of photovoltaic sub-arrays, and the installation of each photovoltaic sub-array comprises the following steps:

s210, fixing a photovoltaic support base on the concrete foundation by adopting a concrete foundation and using expansion bolts or pre-embedded bolts, fixing a photovoltaic support 20 on the photovoltaic support base, wherein a plurality of regularly arranged photovoltaic supports 20 form a supporting structure of a photovoltaic sub-array, and the front photovoltaic support 20 and the rear photovoltaic support 20 are arranged at intervals to ensure that no shielding exists between the front row and the rear row;

s220, installing the junction box 30, the illumination angle sensor 40 and the PLC 50 on the photovoltaic bracket 20;

s230, fixing the photovoltaic cell 10 on the photovoltaic support 20, adjusting the inclination angle of the photovoltaic cell 10 facing the south-positive direction through the photovoltaic support 20 to ensure that sunlight is vertically incident to the photovoltaic cell 10, and after the photovoltaic cell 10 is fixed, connecting the photovoltaic cell in series and laying a lead;

s240, arranging a temperature sensor and an air direction and wind speed sensor in each photovoltaic sub-array field region;

s300, installing a direct current combiner box corresponding to the photovoltaic sub-array in the planned area, and uniformly connecting and combining the group of serial conductors in each photovoltaic assembly in the direct current combiner box;

s400, installing an inverter, and converting the direct current collected in the corresponding direct current combiner box into alternating current;

s500, building a box-type substation, and boosting the alternating current converted by the corresponding inverter;

s600, setting a regional power control center controlled by a local power department, uniformly merging a plurality of groups of alternating current subjected to voltage boosting by a box-type substation into a power grid, and comprehensively supervising and controlling a sensor assembly and an electrical control system by the regional power control center;

and S700, electrifying and testing after construction is finished, carrying out no-load test operation, and completing and checking after the operation is qualified.

The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents and are included in the scope of the present invention.