JP2020031455A - Photovoltaic power generation device - Google Patents

Abstract

To provide a photovoltaic power generation device which can take out the maximum amount of generation power from a double-sided power generation type solar cell module during the daytime from sunrise to sunset while removing blocking factors of power generation of a panel surface and a panel backside of a double-sided power generation type solar cell panel.SOLUTION: A rotating shaft 20 is sandwiched between solar cell panels 10, 10. The surface of the solar cell panel 10 and the rotating shaft 20 are joined together in a flush state without difference in level. Also, industrial waste 70 such as white sheet or white seashell which increases a reflectance of solar light is laid on an installation site. A controller 60 is constructed to search an optimum angle θ* of the solar cell panel 10 when the amount of generation power is a maximum value PQmax while at each prescribed time interval driving a motor 50 to change an angle value of the solar cell panel 10 by 5° and set the angle value of the solar cell panel 10 to the optimum angle θ* to hold it for a prescribed time.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a photovoltaic power generation device, and more particularly, to a photovoltaic power generation device during the daytime from sunrise to sunset, while removing factors that hinder power generation on the front and back surfaces of the photovoltaic cell panel. The present invention relates to a single-axis tracking solar power generation device capable of extracting a maximum amount of generated power from a module.

  Regarding the snow cover on the solar cell panel surface, when several millimeters of snow are piled on the panel surface, the sunlight cannot be reflected on the surface of the snow cover and reach the solar cell element. As a result, the solar panel does not generate power at all. Therefore, for photovoltaic power generators installed in areas with heavy snowfall, it is detected whether or not there is snow on the surface of the solar panel, and if snow is detected, the snow slides off the surface of the solar panel. Need to be done. As a mechanism to slide snow from the solar cell panel surface, a snowfall sensor is provided, a rotating shaft is fixed to the panel on the lower surface of the solar cell panel, a driven gear is provided at the end of the rotating shaft, and at the end of the rotating shaft of the motor Provides a drive gear that cooperates with the driven gear, wraps an endless belt around the drive gear and the driven gear, and when it detects a snowfall state, drives the motor to rotate the solar panel from the inclined state to the vertical state. Is known (for example, refer to Patent Document 1).

  In addition, by comparing the amount of scattered power generated at the fine weather calculated from the sun position, the inclination angle of the gantry, the amount of scattered solar radiation at the time of fine weather, and the actual power output of the solar cell panel, the amount of power generated is scattered at the time of fine weather. A method of controlling a photovoltaic power generator configured to determine that there is snow on the panel surface and set the tilt angle of the gantry to the maximum tilt angle of the movable gantry when 70% or less of the panel surface is known. (See, for example, Patent Document 2).

  By the way, regarding the amount of generated electric power of the solar cell panel, when the sunlight is perpendicularly incident on the surface of the solar cell panel, the amount of generated electric power of the solar cell panel becomes maximum. Therefore, there is known a so-called single-axis tracking solar power generation device that is configured to change the inclination angle of the solar cell panel along the orbit of the sun so that the sunlight always enters the solar cell panel surface perpendicularly. (See, for example, Patent Documents 2 and 3)

  In the solar power generation device described in Patent Document 2, the amount of direct solar radiation in fine weather, the amount of scattered solar radiation in fine weather, and the maximum amount of solar radiation on the inclined surface with respect to the panel surface calculated from the direct solar irradiance, the solar azimuth and the solar altitude. The gantry inclination angle (the inclination angle of the solar cell panel) is set so that

  Further, in the solar power generation device described in Patent Document 3, as the solar cell panel, a solar cell panel (double-sided panel) in which solar cell elements are disposed on both sides of the panel is used, and the double-sided panel is arranged along the east-west direction. And a plurality of link mechanisms are arranged via a link mechanism, and the link mechanism is connected to the drive mechanism. Therefore, the inclination angle of the double-sided panel is variable. In the solar power generation device described in Patent Document 3, for example, one panel surface is used from sunrise to noon, and the other panel surface is used from noon to sunset. It is configured to be always perpendicular to the surface.

JP 2013-197253 A Patent No. 5432843 JP 2011-108703 A

  The snowfall sensor described in Patent Literature 1 detects a snowfall state (a state in which snow is falling) by detecting both the moisture content of snow and the outside air temperature (see Patent Literature 1 [0061]). . Therefore, according to the photovoltaic power generation device provided with the snowfall sensor, when snow does not accumulate on the solar cell panel surface, and when snow falls, the solar cell panel is forcibly placed in a vertical state. .

  Therefore, in the photovoltaic power generation device provided with the above snowfall sensor, when a snowfall state is detected, the photovoltaic panel is placed in a vertical state in which the amount of incident light from sunlight is reduced even when the solar cell panel can generate power. Therefore, there is a problem that the maximum power cannot be extracted from the solar cell panel.

  Further, in the solar power generation device described in Patent Literature 2, the state of snow accumulation on the panel surface is determined by comparing the amount of scattered power generation (calculated value) and the amount of power generation output (actually measured value) in fine weather. Therefore, when the accuracy of the calculated scattered power generation amount at the time of fine weather is low, there is a problem in that the snow condition on the panel surface cannot be correctly determined.

  Further, in the double-sided power generation type solar power generation device described in Patent Document 3, as a result, the amount of generated power on one of the panel surfaces (the panel surface on which sunlight enters from an angle close to vertical) is maximized. Thus, the inclination angle of the double-sided panel is set. Therefore, since the power generation efficiency of the other panel surface is not considered much, there is a problem that the maximum amount of generated power cannot be extracted from the solar cell panel.

  Therefore, the present invention has been made in view of the above-mentioned problems of the prior art, and its object is to remove the obstruction of power generation on the panel surface and the back surface of a double-sided power generation type solar cell panel from sunrise to sunset. Another object of the present invention is to provide a single-axis tracking solar power generation device capable of extracting the maximum amount of generated power from a double-sided power generation type solar cell module during the daytime.

  In order to achieve the above object, a photovoltaic power generation device according to the present invention includes a plurality of double-sided power generation type solar cell panels (10), and a rotation for tilting the surface of the solar cell panel (10) so as to face the sun. And a plurality of solar cell panels (10) symmetrically with respect to the rotation axis (20) and linearly sandwiching the rotation axis (20). It is characterized by being arranged along the axial direction of the rotating shaft (20).

  In the above configuration, the solar cell panel (10) of the double-sided power generation type is attached to the vertical direction of the rotating shaft (20) while sandwiching the rotating shaft (20). That is, the rotating shaft (20) is disposed in a gap between the solar cell panels (10). Thereby, in the solar cell panel (10) of the double-sided power generation type, the rotating shaft (20) does not block the back surface of the solar cell panel (10). As a result, the reflected light from the ground surface and the scattered light from other photovoltaic power generation devices enter the back surface of the photovoltaic cell panel (10), and the total amount of photovoltaic power generated increases.

  A second feature of the photovoltaic power generator according to the present invention is that the surface of the solar cell panel (10) is joined flush with the rotation axis (20).

  In the above configuration, the surface of the solar cell panel (10) is in a state without steps or irregularities. Therefore, when there is snow on the surface of the solar cell panel (10), the snow can easily slide off the panel surface (10a) by inclining the solar cell panel (10) to 70 ° or more. As a result, the power generation on the surface of the solar cell panel (10) is not hindered by snow.

  A third feature of the solar power generation device according to the present invention is that a colored sheet or aggregate (70) that increases the reflectance of sunlight is laid at a place where the solar power generation device is installed. It is.

  In the above-described configuration, the colored sheet or aggregate (70) that increases the reflectance of sunlight increases the amount of incident light reflected from the ground surface incident on the back surface of the solar cell panel (10). Thereby, the amount of generated power on the back surface of the solar cell panel (10) increases.

  A fourth feature of the photovoltaic power generator according to the present invention is that a driving device (50) for driving the rotating shaft (20), a control device (60) for controlling the driving device (50), and the solar cell A power measuring means (11) for measuring a power generation amount (PQ) of the panel (10), wherein the control device (60) measures a power generation amount of the solar cell panel (10) and When it is determined that there is snow on the surface of the solar cell panel (10) based on information on the back surface power generation amount (B2, B3) when power is generated only on the back surface of the battery panel (10), the solar cell panel ( 10) The configuration is such that the inclination angle is set to a predetermined angle.

  In the above configuration, the actually measured power generation amount (PQ) of the solar cell panel (10) is compared with information of the back surface power generation amount (B2, B3) of the solar cell panel (10) which is acquired in advance. This makes it possible to accurately detect the state of snow on the panel surface (10a). In addition, by setting the solar cell panel (10) at a predetermined inclination angle by the driving device (50), it becomes possible to slide snow from the panel surface (10a) of the solar cell panel (10). Thereby, the solar power generation on the panel surface (10a) is not hindered by the snow.

  A fifth feature of the photovoltaic power generation device according to the present invention is that the control device (60) is configured such that, when the generated power amount (PQ) is less than 10% to 15% of the latest measured value, the solar cell panel (10) The tilt angle is set to 70 ° or more.

  In the above configuration, the threshold allows the snow condition on the panel surface (10a) to be accurately detected, and the snow cover can be suitably slid off the panel surface (10a) of the solar cell panel (10). Become.

  A sixth feature of the photovoltaic power generation device according to the present invention is that the control device (60) controls the power of the solar cell panel (10) at predetermined time intervals during the day from sunrise to sunset. The inclination angle is changed at predetermined angle intervals, and the inclination angle of the solar cell panel (10) is set to the inclination angle at which the generated power amount (PQ) is maximum, and is maintained for a predetermined time. It is configured as follows.

  With the above configuration, it is possible to maximize the amount of generated power (PQ) of the double-sided solar cell panel (10) during the daytime from sunrise to sunset. Thus, it is possible to extract the maximum amount of generated power from the double-sided power generation type solar cell module during the daytime from sunrise to sunset.

  A seventh feature of the solar power generation device according to the present invention is that the control device (60) sets the inclination angle of the solar cell panel (10) to 70 ° or more during the night from sunset to sunrise. Is configured.

  With the above configuration, it is possible to preferably prevent snow from accumulating on the panel surface (10a) of the solar cell panel (10).

  An eighth feature of the photovoltaic power generation device according to the present invention is that the control device (60) acquires a weather forecast from the Meteorological Agency or the like and sets the solar cell panel (10) in a time zone when snowfall is predicted. The configuration is such that the inclination angle is set to 70 ° or more.

  With the above configuration, it is possible to preferably prevent snow from accumulating on the surface of the solar cell panel (10).

  A ninth feature of the solar power generation device according to the present invention is that the control device (60) obtains a weather forecast from the Meteorological Agency or the like and sets the solar battery in a time zone in which the wind speed is expected to be 10 m / s or more. The configuration is such that the inclination angle of the panel (10) is set to 15 ° or less.

  A tenth feature of the photovoltaic power generation device according to the present invention is that the control device (60) includes a wind speed sensor (12), and when the wind speed becomes 10 m / s or more, the control device (60) The configuration is such that the inclination angle is set to 15 ° or less.

  With the above configuration, it is possible to preferably prevent the solar cell panel (10) from being broken by wind pressure.

  ADVANTAGE OF THE INVENTION According to the photovoltaic power generation device which concerns on this invention, the solar cell of a both-side power generation type during the daytime from sunrise to sunset, removing each generation | occurrence | production inhibitory factor of the panel surface of a both-side power generation type solar cell panel and the back surface It is possible to extract the maximum amount of generated power from the module.

It is explanatory drawing which shows the state which the inclination of the solar cell panel became horizontal with respect to the installation surface. It is explanatory drawing which shows the A arrow of FIG.1 (a). It is explanatory drawing which shows the arrow B of FIG.1 (a). It is explanatory drawing which shows CC cross section of FIG.1 (a). It is explanatory drawing which shows the state which inclined the solar cell panel by 70 degrees with respect to the rotation axis by driving a motor. It is explanatory drawing which shows the rotation control system of the solar cell panel which concerns on this invention. It is explanatory drawing which shows the surface power generation amount, back surface power generation amount, and both-sides power generation amount in the daytime from the sunrise to sunset of the solar cell panel which concerns on this invention, respectively.

  Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings.

  1 to 4 are explanatory diagrams showing a solar power generation device 100 according to one embodiment of the present invention. FIG. 1A shows a state in which the inclination of the solar cell panel 10 is horizontal with respect to the installation surface, and FIG. 1B shows a bottom view of FIG. 1A. FIG. 2 shows a view taken in the direction of the arrow A in FIG. FIG. 3 shows a view on arrow B in FIG. FIG. 4 shows a cross section taken along the line CC of FIG.

  As shown in FIG. 1A, the solar power generation device 100 includes a plurality (six in the present embodiment) of a double-sided power generation type solar cell panel 10 that converts light energy into electric energy, and a solar cell. A rotating shaft 20 for inclining the panel 10, a plurality of bearings 30 for rotatably supporting the rotating shaft 20, a stand 40 for supporting the bearing 30, a motor 50 for driving the rotating shaft 20 to rotate, and controlling the motor 50. And a control device 60 for setting the inclination angle θ of the solar cell panel 10 to an optimum angle. Hereinafter, each configuration will be described.

  The solar cell panel 10 includes, for example, 60 solar cells 10a (hereinafter, referred to as "cells 10a") electrically connected in a planar manner, with a transparent sealing sheet (not shown) interposed therebetween. It has a structure in which transparent glass plates 10b, 10b are laminated from the direction. Therefore, the solar cell panel 10 is a double-sided power generation type solar cell panel capable of receiving reflected light from the ground and scattered light from the other solar power generation devices 100 and generating power not only on the front surface but also on the back surface. .

  The transparent glass plate 10b has been subjected to a low reflection treatment. The sealing sheet (not shown) is made of ethylene vinyl acetate (EVA) having insulation, durability and high transparency. The sealing sheet (not shown) maintains insulation between the cells 10a and also prevents moisture or the like from entering the solar cell panel 10.

  As shown in FIG. 2, the solar cell panel 10 has both ends in the X-axis supported by panel support members 21, 21. The panel support member 21 is formed with a step 21a into which the solar cell panel 10 fits. Therefore, the panel support member 21 also functions as an X-direction stopper that regulates the movement of the solar cell panel 10 in the X-direction. The movement of the solar cell panel 10 in the Y direction is restricted by the first restricting member 22. The first regulating member 22 is attached to the tip of the panel supporting member 21 by a bolt 22a via an elastic body (not shown).

  The movement of the solar cell panel 10 in the Z direction is regulated by a pair of second regulating members 23, 23 (one second regulating member 23 at the X-axis end) and bolts 23a and nuts 23b in such a manner as to be sandwiched from both sides. I have. The pair of second regulating members 23, 23 fix the solar cell panel 10 by sandwiching the X-axis end where the cell 10a is not provided from both sides in the solar cell panel 10. An elastic body (for example, rubber) 23c is inserted between the second regulating member 23 and the solar cell panel 10.

  As shown in FIG. 1A, a pair of second regulating members 23, 23 integrate adjacent solar cell panels 10, 10 to form a module of the solar cell panel 10 as a whole.

  As shown in FIG. 3, the rotating shaft 20 has a rectangular long axis in cross section. The bearing 30 that rotatably supports the rotating shaft 20 has an upper bearing 31 and a hollow portion (square prism) through which the rotating shaft 20 penetrates, and an outer surface formed into a spherical surface (partially spherical surface). The lower bearing 32 includes an upper fastener 33 and a lower fastener 34 that integrate the upper bearing 31 and the lower bearing 32. The inner peripheral surface of the upper fastener 33 joined to the upper bearing 31 is formed into a spherical surface (partially spherical surface). The inner peripheral surface joined to the lower bearing 32 of the lower fastener 34 is also formed as a spherical surface (partial spherical surface). The upper fastener 33 and the lower fastener 34 are fixed to the upper end plate 41 of the stand 40 by bolts 33a and nuts 34a.

  The stand 40 includes an upper end plate 41 for fixing the bearing 30, a leg 42 for supporting the solar cell module, and a lower end plate 42 for stably grounding the solar cell module to the ground. .

  As shown in FIG. 4, the solar cell panels 10, 10 have the rotation axis 20 interposed therebetween, and the surface of the solar cell panel 10 and the rotation axis 20 are joined in a flush manner without any level difference.

  FIG. 5 is an explanatory diagram illustrating a state in which the motor 50 is driven to tilt the solar cell panel 10 by 70 ° with respect to the rotation axis 20. Note that, for convenience of explanation, the pair of second regulating members 23 is omitted. Since the surface of the solar cell panel 10 and the rotating shaft 20 are joined in a flat manner without any level difference, snow on the surface of the solar cell panel 10 slides down from the surface of the solar cell panel 10 and falls to the ground. Become like

  Moreover, since the solar cell panels 10 and 10 are arranged on both sides of the rotating shaft 20 with the rotating shaft 20 interposed therebetween, the rotating shaft 20 is positioned on the back surface of the double-sided power generation type solar cell panel 10. No more shielding. Thereby, the reflected light and the scattered light are preferably incident on the back surface of the solar cell panel 10.

  Further, on the installation surface on which the photovoltaic power generation device 100 is installed, industrial waste 70 such as a white shell that increases reflected light and scattered light is spread. Note that a colored sheet (for example, a white sheet) having excellent reflectance may be laid instead of the industrial waste 70 such as a shell. In this way, by dispersing the industrial waste 70, reflected light / scattered light from the ground increases, and the amount of power generated from the back surface is improved.

  FIG. 6 is an explanatory diagram showing a rotation control system of the solar cell panel 10 according to the present invention. FIG. 6A shows a block diagram of a rotation control system, and FIG. 6B shows a correlation between the tilt angle θ of the solar cell panel 10 and the amount of generated power PQ. The correlation shown on the left is a correlation at predetermined time intervals (for example, 15 minutes to 30 minutes) during the daytime from sunrise to sunset. Therefore, when the time interval is 30 minutes, the time from sunrise to sunset is 12 hours, and there are 24 correlations of 12 [hours] × 60 [minutes / hour] ÷ 30 [minutes]. become.

  As shown in FIG. 6A, the control device 60 drives the motor 50 to, for example, obtain an inclination angle of the solar cell panel 10 around the rotation axis 20 from an angle sensor 51 (for example, an encoder) attached to the bearing 30. At the same time as obtaining θ, the generated power amount PQ of the entire solar cell panel 10 (solar cell module) is obtained from the power sensor 11.

  Then, as shown in FIG. 6B, the control device 60 acquires the generated power amount PQ by the power sensor 11 while driving the motor 50 to change the inclination angle θ of the solar cell panel 10 by 5 °. Then, the optimum angle θ * of the solar cell panel 10 when the generated power amount PQ takes the maximum value PQmax is searched. When searching for the optimum angle θ *, the controller 60 controls the angle of the motor 50 so that the inclination angle of the solar cell panel 10 is maintained at the optimum angle θ * for a predetermined time (for example, 30 minutes).

  After holding the solar cell panel 10 at the optimum angle θ * for a predetermined time, the control device 60 repeatedly executes the search process for the optimum angle θ * so that the generated power amount PQ of the solar cell panel 10 becomes the maximum value PQmax. The inclination angle of the solar cell panel 10 is set to the optimum angle θ * when taking. When the predetermined time interval is 30 minutes, the search process for the optimum angle θ * is repeatedly performed 24 times (= 12 [hours] × 60 [minutes / hour] ÷ 30 [minutes]). . As described above, the control device 60 sets the tilt angle of the solar cell panel 10 to the optimum angle θ * when the generated power amount PQ of the solar cell module takes the maximum value PQmax during the daytime from sunrise to sunset. Become. As a result, the solar power generation device 100 obtains the maximum amount of generated power from the solar cell module from sunrise to sunset.

  As shown in FIG. 6A, the control device 60 always takes in the measurement data of the wind speed sensor 12, and sets the inclination angle θ of the solar cell panel 10 to a horizontal angle or an inclination angle of 15 ° or less in a strong wind. It is configured to be. Therefore, even when the inclination angle of the solar cell panel 10 is maintained at the optimal angle θ *, the control device 60 detects a strong wind (for example, a wind speed of 10 m / s or more) with the wind speed sensor 12. The angle of the motor 50 is controlled so that the inclination angle θ of the solar cell panel 10 is forced to be horizontal or equal to or less than 15 °.

  In addition, the control device 60 acquires the weather forecast information T from the Meteorological Agency or the like, and sets the motor 50 so that the tilt angle θ of the solar cell panel 10 is horizontal or equal to or less than 15 ° during a time when a strong wind is predicted. Can also be angle-controlled.

  Further, the control device 60 acquires the information T of the weather forecast from the Meteorological Agency or the like, and sets the motor so that the inclination angle θ of the solar cell panel 10 becomes the inclination angle of 60 ° to 90 ° during the time when snowfall is predicted. Angle control of 50 is also possible.

  FIG. 7 is an explanatory diagram showing the front surface power generation amount F, the back surface power generation amount B, and the double-sided power generation amount F + B of the solar cell panel 10 according to the present invention during the day from sunrise to sunset. FIG. 7A shows the amount of generated power (surface power generation F) of the solar cell panel 10 when the rear surface of the panel is shielded and power is generated only on the front surface of the panel. FIG. 7B shows the amount of generated power (backside power generation B) of the solar cell panel 10 when the panel surface is shielded and power is generated only on the rear surface of the panel. FIG. 7C shows the generated power amount (both-sided power generation amount F + B) of the solar cell panel 10 when power is generated on both sides of the panel. The solid line indicates the amount of power generation when it is sunny, and the dashed line indicates the amount of power generation when there is snow on the panel surface.

  As shown in FIG. 7A, when there is snow on the panel surface, the surface power generation amount F becomes zero. Further, the surface power generation amount F when cloudy is reduced to about 20 to 30% of the power generation amount on a sunny day. On the other hand, as shown in FIG. 7B, the back surface power generation B is the smallest on the cloudy or rainy day when the back surface power generation B3 is the smallest, and the back surface power generation when the snowy state (snow surface) on a sunny day. B1 is the largest. In addition, the back surface power generation amount B2 when it is in a grassy state on a sunny day has an intermediate value.

  Therefore, as shown in FIG. 7 (c), the power generation amount F + B on both sides of the solar cell panel 10 when power is generated on both sides of the panel is equal to the sum of FIGS. 7 (a) and 7 (b). . In particular, at time T3 when the weather changes from sunny to snow, the double-sided power generation amount F + B of the solar cell panel 10 sharply decreases. This is because, as shown in FIG. 7A, when snow starts to accumulate on the panel surface, the surface power generation amount F sharply decreases and eventually becomes zero.

  Then, after time T4 when snow of several millimeters occurs on the panel surface, the front surface power generation amount F becomes zero and at the same time, only the back surface power generation amount B is output. It should be noted here that the double-sided power generation amount F + B (backside power generation amount B) is larger than the backside power generation amount B3 in the grassland on a cloudy / rainy day and smaller than the backside power generation amount B2 in the grassland on a sunny day. It is. That is, when there is snow on the panel surface in a snowfall state, the backside power generation B is dominant in the double-sided power generation F + B, and the backside power generation B is “the backside power generation B2 in the grassland on a sunny day”. The transition is a value intermediate between "the backside power generation amount B3 on the grassland on a cloudy / rainy day". This is because the reflectance on the snow surface on a snowy day is larger than the reflectance on a grassland on a cloudy / rainy day and smaller than the reflectance on a grassland on a sunny day.

  Therefore, regarding the data relating to “the backside power generation amount B1 on the snowy surface on a sunny day”, “the backside power generation amount B2 on the grassland on a sunny day”, and “the backside power generation amount B3 on the grassland on a cloudy / rainy day”, By making a database in advance and storing it in a storage device (such as a hard disk), it is possible to detect whether or not there is snow on the panel surface. That is, the controller 60 takes in the generated power amount PQ from the power sensor 11 during the daytime from sunrise to sunset, and the generated power amount PQ is larger than the back surface power generation amount B3 and smaller than the back surface power generation amount B2. It is also possible to determine that there is snow on the panel surface, and control the angle of the motor 50 so that the inclination angle θ of the solar cell panel 10 becomes an inclination angle of 60 ° to 90 °.

  Alternatively, from FIG. 7 (c), when the generated power amount uniformly decreases from 10% to 15% (threshold value) of the latest measured value, it can be determined that there is snow on the panel surface. . In this case, 10% of the latest measured value is adopted in a time zone of ± 2 hours from noon when the power generation amount becomes relatively high, and 15% of the latest measured value is adopted in other time zones. , Different thresholds may be set.

  As described above, according to the photovoltaic power generation device 100 according to the present embodiment, during the daytime from sunrise to sunset, the respective power generation obstruction factors on the front surface and the back surface of the double-sided power generation type solar cell panel 10 are removed. It is possible to extract the maximum amount of generated power from the double-sided power generation type solar cell module.

  More specifically, the solar cell panels 10, 10 of the double-sided power generation type have the rotating shaft 20 interposed therebetween, and the surface of the solar cell panel 10 and the rotating shaft 20 are joined in a flat form without any level difference. The shaft 20 does not block the rear surface of the panel. As a result, reflected light / scattered light from the ground plane is suitably incident on the back surface of the panel, and the amount of generated power of the entire solar cell module is increased. In addition, by inclining the solar cell panel 10 by 70 ° or more, it is possible to easily slide down snow on the panel surface.

  In addition, in the place where the photovoltaic power generation device 100 is installed, since the industrial waste 70 such as a white sheet or a white shell that increases the reflectance of sunlight is laid, from the ground surface to the back surface of the panel. Incident reflected light / scattered light increases, which increases the power generation amount of the entire solar cell module.

  The control device 60 of the photovoltaic power generation device 100 sets the inclination angle of the photovoltaic panel 10 to the maximum value PQmax of the generated power amount PQ of the photovoltaic module at predetermined time intervals during the daytime from sunrise to sunset. It is configured to set the optimum angle θ * when taking. Thereby, the solar power generation device 100 can obtain the maximum generated power amount from the solar cell module from sunrise to sunset.

  Further, the control device 60 is configured to always take in the measurement data of the wind speed sensor 12 and to set the inclination angle θ of the solar cell panel 10 to a horizontal angle or an inclination angle of 15 ° or less in a strong wind. This makes it possible to prevent the solar cell panel 10, the rotating shaft 20, the bearing 30, the stand 40, the motor 50, and the like from being destroyed by wind pressure in advance.

  Further, the control device 60 acquires the information T of the weather forecast of the Meteorological Agency or the like, and sets the inclination angle θ of the solar cell panel 10 to the inclination angle of 60 ° to 90 ° during the time when snowfall is predicted. It is configured. Thereby, it is possible to prevent in advance that the solar power generation of the solar cell panel 10 is hindered by snow.

  Further, during the daytime from sunrise to sunset, the control device 60 takes in the generated power amount PQ from the power sensor 11 and calculates the generated power amount PQ from “the back surface power generation amount B3 in the grassland on a cloudy / rainy day”. When it is large and smaller than "the back surface power generation amount B2 on the grassland on a sunny day", the inclination angle θ of the solar cell panel 10 is set to an inclination angle of 60 ° to 90 °. Thereby, it is possible to prevent in advance that the solar power generation of the solar cell panel 10 is hindered by snow.

10 solar cell panel 10a solar cell (cell)
10b Transparent glass plate 11 Power sensor 12 Wind speed sensor 20 Rotating shaft 21 Panel support member 22 First regulating member 23 Second regulating member 30 Bearing 31 Upper bearing 32 Lower bearing 33 Upper fastener 34 Lower fastener 40 Stand 41 Upper end plate 42 Leg 43 Lower end plate 50 Motor 60 Controller 70 Industrial waste θ Incline angle PQ Generated power 100 Solar power generator

Claims (10)

A solar power generation apparatus comprising: a plurality of double-sided power generation type solar cell panels (10); and a rotation axis (20) for inclining a surface of the solar cell panel (10) so as to direct the sun,
The plurality of solar cell panels (10) are disposed symmetrically with respect to the rotation axis (20) and along the longitudinal direction of the rotation axis (20) while sandwiching the rotation axis (20) linearly. A solar power generation device. The photovoltaic power generator according to claim 1,
A photovoltaic power generator, wherein a surface of the solar cell panel (10) is joined flush with the rotating shaft (20). The photovoltaic power generator according to claim 1 or 2,
A solar power generation device, wherein a colored sheet or aggregate (70) for increasing the reflectance of sunlight is laid at a place where the photovoltaic power generation device is installed. The photovoltaic power generator according to any one of claims 1 to 3,
A driving device (50) for driving the rotating shaft (20), a control device (60) for controlling the driving device (50), and electric power for measuring the amount of generated power (PQ) of the solar cell panel (10) Measuring means (11),
The control device (60) measures the amount of power generated by the solar cell panel (10) and calculates the amount of back-side power generation (B2, B3) when power is generated only at the back of the panel of the solar cell panel (10). When it is determined that there is snow on the surface of the solar cell panel (10) based on the information, the sun is configured to set the inclination angle of the solar cell panel (10) to a predetermined angle. Photovoltaic device. The photovoltaic power generator according to claim 4,
The control device (60) sets the tilt angle of the solar cell panel (10) to 70 ° or more when the generated power amount (PQ) is lower than 10% to 15% of the latest measured value. A photovoltaic power generation device characterized by being configured as described above. The photovoltaic power generator according to claim 4 or 5,
The controller (60) changes the tilt angle of the solar cell panel (10) at predetermined time intervals at predetermined time intervals during the day from sunrise to sunset, A photovoltaic power generation apparatus characterized in that the tilt angle of the panel (10) is set to a tilt angle when the amount of generated power (PQ) is maximum, and is held for a predetermined time. . The photovoltaic power generator according to claim 4 or 5,
The said control apparatus (60) is comprised so that the said inclination angle of a solar cell panel (10) may be set to 70 degree or more in the night from sunset to sunrise. The photovoltaic power generator according to any one of claims 4 to 7,
The control device (60) is configured to acquire a weather forecast from the Meteorological Agency or the like and to set the inclination angle of the solar cell panel (10) to 70 ° or more during a time period when snowfall is predicted. A solar power generation device characterized by the above-mentioned. The photovoltaic power generator according to any one of claims 4 to 8,
The control device (60) acquires a weather forecast from the Meteorological Agency or the like, and sets the inclination angle of the solar cell panel (10) to 15 ° or less during a time period when the wind speed is expected to be 10 m / s or more. The solar power generation device characterized by being comprised as follows. The solar power generation device according to claim 9,
The control device (60) includes a wind speed sensor (12), and is configured to set the inclination angle of the solar cell panel (10) to 15 ° or less when the wind speed becomes 10 m / s or more. A solar power generation device characterized by the above-mentioned.