Reflector angle regulation and control method of double-glass photovoltaic panel power generation system

Abstract

The invention discloses a reflector angle regulation and control method of a double-glass photovoltaic panel power generation system, which comprises a double-glass photovoltaic panel, a reflector and a reflector angle regulation and control mechanism, and the reflector is mounted on the reflector angle regulation and control mechanism. The calculation formula of the included angle between the reflector and the horizontal plane is established, and the included angle value between the reflector and the horizontal plane can be calculated in real time according to the angle, measured in real time, of sunlight relative to the horizontal plane; and the calculated included angle value between the reflector and the horizontal plane is used as a target control angle of a rotary driving motor of a reflector angle regulation and control mechanism, and the rotary driving motor of the reflector angle regulation and control mechanism is controlled by adopting a PID control method, so that the angle of the reflector is regulated in real time. Therefore, the reflecting quantity of the reflecting plate to the reflected light on the back surface of the double-glass photovoltaic panel is increased as much as possible.

Description

Technical Field

[0001] The present invention belongs to the technical field of photovoltaic power generation, and in particular relates to a method for controlling the angle of a reflector of a double-glass photovoltaic panel power generation system. Background Art

[0002] Double-glass photovoltaic panels are a composite photovoltaic panel structure consisting of two pieces of glass on the front and back and solar cells. Both the front and back sides of the double-glass photovoltaic panels can receive sunlight to generate electricity (the front of the double-glass photovoltaic panel is the main light-receiving surface, used to receive direct sunlight, while the back of the double-glass photovoltaic panel can receive reflected sunlight from the roof or the ground). Therefore, double-glass photovoltaic panels have a higher power generation than traditional single-glass photovoltaic panels. Double-glass photovoltaic panels also have the advantages of reducing the generation of snail patterns, reducing PID attenuation, extending the life cycle of components, and better weather resistance, and have a good application market.

[0003] At present, the back gain power generation of the existing double-glass photovoltaic panels is not ideal. The main reason is that the reflection amount of the reflected light from the roof or the ground is poor, and the reflection angle of the reflected light cannot be adjusted. Therefore, there is an urgent need for a method for controlling the angle of the reflector of the double-glass photovoltaic panel power generation system. Summary of the invention

[0004] The present invention mainly aims to overcome the deficiencies of the prior art and provides a method for controlling the angle of a reflector of a double-glass photovoltaic panel power generation system.

[0005] The present invention is achieved through the following technical solutions:

[0006] A reflector angle control method for a double-glass photovoltaic panel power generation system, the double-glass photovoltaic panel power generation system comprising: a double-glass photovoltaic panel, a reflector and a reflector angle control mechanism, the reflector is mounted on the reflector angle control mechanism; the double-glass photovoltaic panel is mounted on a photovoltaic panel mounting bracket, the reflector and the reflector angle control mechanism are arranged at a lower side of the double-glass photovoltaic panel;

[0007] The method for controlling the angle of the reflector of the double-glass photovoltaic panel power generation system comprises the following steps:

[0008] Step 1: Real-time measurement of the angle a of sunlight relative to the horizontal plane; actual measurement of the straight-line distance s between the center point O1 of the double-glass photovoltaic panel and the center point O2 of the reflector; actual measurement of the vertical distance difference △h between the center point O1 of the double-glass photovoltaic panel and the center point O2 of the reflector;

[0009] Step 2: Establish the following relationship:

[0010] m+c+u=90°;

[0011] m+m+c=a;

[0012] c = arcsin△h / s;

[0013] In the above formula, m is the angle between the sunlight and the vertical plane of the reflector, which is also the angle between the reflected light and the vertical plane of the reflector; c is the angle between the reflected light and the horizontal plane;

[0014] Step 3: According to the relationship in step 2, the formula for calculating the angle u between the reflector and the horizontal plane is obtained: u = 90° - (a + arcsin△h / s) / 2;

[0015] Step 4: Based on the real-time measured angle a of sunlight relative to the horizontal plane, the value of u is calculated in real time using the calculation formula for the angle u between the reflector and the horizontal plane obtained in step 3;

[0016] Step 5: The calculated u value is used as the target control angle of the rotary drive motor of the reflector angle control mechanism, and the PID control method is used to control the rotary drive motor of the reflector angle control mechanism to adjust the angle of the reflector in real time, so as to maximize the amount of light reflected by the reflector on the back of the double-glass photovoltaic panel.

[0017] In the above technical solution, the photovoltaic panel mounting bracket includes a base, a vertical support beam and a top support beam; the base includes two front and rear rows, the vertical support beam is vertically fixed on the base, the top support beam is installed on the vertical support beam through a connecting piece, and the double-glass photovoltaic panel is installed on the top support beam.

[0018] In the above technical solution, the top support beam of the photovoltaic panel mounting bracket is arranged at an angle.

[0019] In the above technical solution, multiple rows of double-glass photovoltaic panels are arranged in the target installation area, and the multiple rows of double-glass photovoltaic panels are arranged in an interlaced manner. The reflector and the reflector angle control mechanism are arranged in the gap between the two adjacent rows of double-glass photovoltaic panels in front and behind, so that the reflector can reflect sunlight to the back side of the double-glass photovoltaic panel corresponding to the front row.

[0020] In the above technical solution, the installation height of the reflective plate is lower than the installation height of the double-glass photovoltaic panel it illuminates.

[0021] In the above technical solution, the reflector angle adjustment mechanism is installed on the base of the photovoltaic panel mounting bracket of the double-glass photovoltaic panel in the rear row, thereby minimizing damage to the ground or the roof.

[0022] In the above technical solution, the reflector angle control mechanism includes a reflector mounting frame, a rotation drive motor and a fixed mounting arm, the reflector is fixedly mounted on the reflector mounting frame, and the reflector mounting frame is rotatably mounted on the fixed mounting arm through a rotating shaft, and the rotation drive motor is transmission-connected to the rotating shaft of the reflector mounting frame, and then the reflector mounting frame is driven by the rotation drive motor to adjust its rotation angle, that is, to adjust the reflection angle of the reflector, so that the sunlight reflected by the reflector can irradiate the back of the double-glass photovoltaic panel.

[0023] The advantages and beneficial effects of the present invention are:

[0024] The double-glass photovoltaic panel power generation system of the present invention is additionally provided with a reflector and a reflector angle control mechanism, the reflector angle control mechanism drives the reflector to adjust its angle, and a solution formula for the angle between the reflector and the horizontal plane is established, and the angle value between the reflector and the horizontal plane can be solved in real time according to the angle of sunlight relative to the horizontal plane measured in real time; the solved angle value between the reflector and the horizontal plane is used as the target control angle of the rotation drive motor of the reflector angle control mechanism, and a PID control method is adopted to control the rotation drive motor of the reflector angle control mechanism to adjust the angle of the reflector in real time, so as to achieve the function of increasing the amount of reflection of the light reflected from the back of the double-glass photovoltaic panel by the reflector as much as possible. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a structural schematic diagram of the double-glass photovoltaic panel power generation system of the present invention.

[0026] Figure 2 It is a schematic diagram of the arrangement of the double-glass photovoltaic panel power generation system of the present invention.

[0027] Figure 3 It is a schematic diagram of the principle of sunlight reflection and irradiation between the reflective plate and the double-glass photovoltaic panel of the present invention.

[0028] Figure 4 Schematic diagram of the calculation principle of the angle between the reflector and the horizontal plane.

[0029] For ordinary technicians in this field, other relevant drawings can be obtained based on the above drawings without any creative work. DETAILED DESCRIPTION

[0030] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is further described below in conjunction with specific embodiments.

[0031] The present invention provides a method for controlling the angle of a reflector in a double-glass photovoltaic panel power generation system. Figure 1 and attached Figure 2The double-glass photovoltaic panel power generation system includes: a double-glass photovoltaic panel 1, a reflector 2 and a reflector angle control mechanism 3. The reflector 2 is installed on the reflector angle control mechanism 3. The reflector angle control mechanism 3 drives the reflector 2 to adjust its angle, so that the sunlight reflected by the reflector 2 can irradiate the back side of the double-glass photovoltaic panel 1, thereby increasing the back side power generation gain of the double-glass photovoltaic panel.

[0032] The specific structural design of the double-glass photovoltaic panel power generation system of the present invention is described in detail below.

[0033] The double-glass photovoltaic panel 1 is mounted on a photovoltaic panel mounting bracket 4. Specifically, the photovoltaic panel mounting bracket 4 includes a base 4.1, a vertical support beam 4.2 and a top support beam 4.3; the base 4.1 includes two front and rear rows, the vertical support beam 4.2 is vertically fixed on the base 4.1, the top support beam 4.3 is installed on the vertical support beam 4.2 through a connecting piece 4.4, the top support beam 4.3 is tilted, and the double-glass photovoltaic panel 1 is installed on the top support beam 4.3.

[0034] The reflector 2 and the reflector angle control mechanism 3 are arranged in the gap between two adjacent rows of double-glass photovoltaic panels 1. That is, multiple rows of double-glass photovoltaic panels 1 are arranged in the target installation area, and the multiple rows of double-glass photovoltaic panels 1 are arranged in an interval manner. The reflector 2 and the reflector angle control mechanism 3 are arranged in the gap between two adjacent rows of double-glass photovoltaic panels 1, so that the reflector 2 can reflect sunlight to the back of the double-glass photovoltaic panel 1 corresponding to the front row.

[0035] Furthermore, the installation height of the reflector 2 is lower than the installation height of the double-glass photovoltaic panel 1 it illuminates. In addition, preferably, the reflector angle control mechanism 3 is installed on the base 4.1 of the photovoltaic panel mounting bracket 4 of the double-glass photovoltaic panel 1 in the rear row, thereby minimizing damage to the ground or roof (i.e., avoiding repeatedly setting up a base dedicated to installing the reflector angle control mechanism 3 on the ground or roof of the target installation area).

[0036] Furthermore, the reflector angle control mechanism 3 includes a reflector mounting frame 3.1, a rotary drive motor 3.2 and a fixed mounting arm 3.3. The reflector 2 is fixedly mounted on the reflector mounting frame 3.1. The reflector mounting frame 3.1 is rotatably mounted on the fixed mounting arm 3.3 through a rotating shaft. The fixed mounting arm 3.3 is fixed on the base 4.1 of the photovoltaic panel mounting bracket 4 of the double-glass photovoltaic panel 1 in the rear row thereof. The rotary drive motor 3.2 is transmission-connected to the rotating shaft of the reflector mounting frame 3.1, and then the rotary drive motor 3.2 drives the reflector mounting frame 3.1 to adjust its rotation angle, that is, adjusts the reflection angle of the reflector 2, so that the sunlight reflected by the reflector 2 can irradiate the back of the double-glass photovoltaic panel 1.

[0037] See attached Figure 3 , is a schematic diagram of the principle of sunlight reflection and irradiation between the reflective plate and the double-glass photovoltaic panel of the present invention. In order to increase the amount of light reflected by the reflective plate on the back side of the double-glass photovoltaic panel as much as possible, the reflection range of the reflected light of the reflective plate to the received sunlight (i.e., the incident light in the figure) should be centered on the back side of the entire double-glass photovoltaic panel.

[0038] According to the attached Figure 3 It can be seen that the height h1 of the center point O1 of the double-glass photovoltaic panel from the ground, the height h2 of the center point O2 of the reflector from the ground, and the straight-line distance s (i.e., the center distance) between the center point O1 of the double-glass photovoltaic panel and the center point O2 of the reflector are fixed and can be actually measured; and the angle u between the reflector and the horizontal plane is used as a variable to be adjusted by the present invention, and the angle u can be adjusted by the rotating drive motor of the reflector angle control mechanism 3 so that the reflection range of the reflected light of the reflector to the received sunlight is centered on the back of the entire double-glass photovoltaic panel.

[0039] The following is combined with Figure 4 , specifically describing the reflector angle control method of the double-glass photovoltaic panel power generation system of the present invention, comprising the following steps:

[0040] Step 1: Real-time measurement of sunlight (i.e. Figure 4 The incident light in the image is at an angle a relative to the horizontal plane; the straight-line distance s between the center point O1 of the double-glass photovoltaic panel and the center point O2 of the reflector is actually measured; the vertical distance difference △h between the center point O1 of the double-glass photovoltaic panel and the center point O2 of the reflector is actually measured, △h=h1-h2.

[0041] Step 2: According to the attached Figure 4 , the following relationship can be established:

[0042] m+c+u=90°;

[0043] m+m+c=a;

[0044] c = arcsin△h / s;

[0045] In the above formula, m is sunlight (i.e. Figure 4 The angle between the incident light and the vertical plane of the reflector is also the angle between the reflected light and the vertical plane of the reflector; c is the angle between the reflected light and the horizontal plane.

[0046] Step 3: Based on the relationship in step 2, the formula for calculating the angle u between the reflector and the horizontal plane can be obtained: u = 90° - (a + arcsin△h / s) / 2.

[0047] Step 4: Since arcsin△h / s is a fixed value, the real-time measured sunlight (i.e. Figure 4 The incident light in the image is at an angle a relative to the horizontal plane. Using the above u calculation formula, the value of u can be calculated in real time (according to the set time step).

[0048] Step 5: The calculated u value is used as the target control angle of the rotary drive motor of the reflector angle control mechanism 3, and the PID control method is used to control the rotary drive motor of the reflector angle control mechanism 3 to adjust the angle of the reflector in real time, so as to maximize the amount of light reflected by the reflector on the back of the double-glass photovoltaic panel.

[0049] For ease of explanation, spatial relative terms such as "upper", "lower", "left", "right" and the like are used in the embodiments to illustrate the relationship of one element or feature shown in the figure relative to another element or feature. It should be understood that, in addition to the orientation shown in the figure, the spatial terms are intended to include different orientations of the device in use or operation. For example, if the device in the figure is inverted, the element described as being "under" other elements or features will be positioned "on" other elements or features. Therefore, the exemplary term "under" can include both upper and lower orientations. The device can be positioned in other ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used here can be interpreted accordingly.

[0050] Furthermore, relational terms such as “first” and “second” and the like are merely used to distinguish one component from another having the same name, but do not necessarily require or imply any such actual relationship or order between these components.

[0051] The present invention is described above by way of example. It should be noted that, without departing from the core of the present invention, any simple deformation, modification or other equivalent replacement that can be made by those skilled in the art without inventive effort falls within the protection scope of the present invention.

Claims

1. A method for controlling the angle of a reflector in a double-glass photovoltaic panel power generation system, characterized in that: The double-glass photovoltaic panel power generation system comprises: a double-glass photovoltaic panel, a reflector and a reflector angle control mechanism, wherein the reflector is mounted on the reflector angle control mechanism; the double-glass photovoltaic panel is mounted on a photovoltaic panel mounting bracket, and the reflector and the reflector angle control mechanism are arranged at a lower side of the double-glass photovoltaic panel; The method for controlling the angle of the reflector of the double-glass photovoltaic panel power generation system comprises the following steps: Step 1: Real-time measurement of the angle a of sunlight relative to the horizontal plane; actual measurement of the straight-line distance s between the center point O1 of the double-glass photovoltaic panel and the center point O2 of the reflector; actual measurement of the vertical distance difference △h between the center point O1 of the double-glass photovoltaic panel and the center point O2 of the reflector; Step 2: Establish the following relationship: m+c+u=90°; m+m+c=a; c = arcsin △ h / s; In the above formula, m is the angle between the sunlight and the vertical plane of the reflector, which is also the angle between the reflected light and the vertical plane of the reflector; c is the angle between the reflected light and the horizontal plane; Step 3: According to the relationship in step 2, the formula for calculating the angle u between the reflector and the horizontal plane is obtained: u = 90° - (a + arcsin△h / s) / 2; Step 4: Based on the real-time measured angle a of sunlight relative to the horizontal plane, the value of u is calculated in real time using the calculation formula for the angle u between the reflector and the horizontal plane obtained in step 3; Step 5: Use the calculated u value as the target control angle of the rotary drive motor of the reflector angle control mechanism, and use the PID control method to control the rotary drive motor of the reflector angle control mechanism to adjust the angle of the reflector in real time.

2. The method for controlling the angle of the reflector of the double-glass photovoltaic panel power generation system according to claim 1, characterized in that: The photovoltaic panel mounting bracket includes a base, a vertical support beam and a top support beam; the base includes two front and rear rows, the vertical support beam is vertically fixed on the base, the top support beam is installed on the vertical support beam through a connecting piece, and the double-glass photovoltaic panel is installed on the top support beam.

3. The method for controlling the angle of the reflector of the double-glass photovoltaic panel power generation system according to claim 2, characterized in that: The top support beam of the photovoltaic panel mounting bracket is arranged obliquely.

4. The method for controlling the angle of the reflector of the double-glass photovoltaic panel power generation system according to claim 1, characterized in that: A plurality of rows of double-glass photovoltaic panels are arranged in a staggered manner in the target installation area, and the reflector and the reflector angle control mechanism are arranged in the gap between two adjacent rows of double-glass photovoltaic panels.

5. The method for controlling the angle of the reflector of the double-glass photovoltaic panel power generation system according to claim 4, characterized in that: The reflector angle adjustment mechanism is installed on the base of the photovoltaic panel mounting bracket of the double-glass photovoltaic panel in the rear row.

6. The method for controlling the angle of the reflector of the double-glass photovoltaic panel power generation system according to claim 1, characterized in that: The reflector angle control mechanism comprises a reflector mounting frame, a rotation drive motor and a fixed mounting support arm, the reflector is fixedly mounted on the reflector mounting frame, the reflector mounting frame is rotatably mounted on the fixed mounting support arm via a rotating shaft, and the rotation drive motor is transmission-connected to the rotating shaft of the reflector mounting frame.

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