KR20090113797A - Solar photovoltaic system and method - Google Patents

Abstract

PURPOSE: A solar power generation system and method are provided to improve generation efficiency on a day with low solar radiation by keeping the solar power generating module horizontal. CONSTITUTION: A solar power generation system(10) comprises a main frame(11), a rotating shaft(12), and a sub-frame(13). The main frame is installed on the ground or a construction structure. The rotating shaft is installed lengthwise on the main frame. The sub-frame including a support member(13a) extending to both sides is installed on the rotating shaft to support a solar power generating module(100). A pillow block is installed in a bearing on the top of the main frame in which the end of the rotating shaft is supported.

Description

Solar photovoltaic device and method according to the change in solar radiation {solar photovoltaic system and method}

The present invention relates to a photovoltaic device, and more particularly, to a photovoltaic device according to a change in solar radiation that can maximize the power generation efficiency according to the change in solar radiation.

 In general, photovoltaic technology is distinguished from solar technology using radiant heat energy transmitted from the sun. Solar power generation uses infinite clean energy, which does not require any additional energy or driving source, it is easy to construct small to large-scale systems, and it is not affected by installation restrictions due to environmental problems.

On the other hand, the amount of power generation depends on the solar radiation time, in order to obtain a large power, a large number of solar power generation module is required, it is expensive compared to commercial power, it should be noted that the DC power is obtained first.

The above-described photovoltaic module tracks the position of the sun through power or device manipulation so that the sun's direct sunlight always enters the front of the photovoltaic module vertically in order to maximize power generation efficiency. There are semi-fixed type where the position is changed up and down, and fixed type is fixed regardless of the altitude with the sun.

Such a solar tracking device is a device for moving a collector or a lens to increase the light collecting ability while tracking a moving sun. The tracking methods are mainly program tracking and sensor tracking. Program tracking is a tracking method in which the light receiver is rotated by inputting the movement of the sun due to the rotation and revolution of the earth to the program in advance. Sensor tracking detects the movement of sunlight with a sensor to control the direction of the light receiver, and various improvements have been made in accordance with various related element technologies. Tracking device technology includes solar position detection method, tracking member, tracking driving method, driving power.

An example of a conventional solar tracking alignment method is disclosed in Korean Utility Model Model No. 277771. The disclosed solar tracking alignment method is integrated with a solar module that focuses sunlight and includes a tracker with an encoder that rotates the solar module and detects a rotational position.

Patent No. 044021 discloses a sun tracking method of an automatic sun tracking device. According to the disclosed solar tracking method, when the normal azimuth angle of the photovoltaic module becomes a first angle behind the azimuth angle of the sun, the azimuth angle of the normal line of the photovoltaic module is advanced by a second angle than the azimuth angle of the sun. It has a configuration for driving the power generation module.

Patent No. 0483291 discloses a solar position tracking method for solar-related facilities, and Patent No. 0369897 discloses a hybrid solar tracking control device for a condensing solar collector, and in Utility Model No. 0404291, A solar tracking device having a light-converging light collecting unit is disclosed, and Utility Model Publication No. 199-00186 discloses an angle adjusting device for a solar panel by radio call.

As described above, the solar energy position tracking device that tracks the position of sunlight maximizes the power generation efficiency even when the weather is cloudy, that is, when the sun is not covered by the cloud, the photovoltaic device is optimally tracked along the sun. There is a problem that cannot be done.

The present invention has been made to solve the problems described above, and an object thereof is to provide a solar power generation apparatus according to the change in insolation amount which can maximize the power generation efficiency in a relatively low amount of insolation.

The solar cell apparatus of the present invention for achieving the above object,

A main frame, a rotating shaft installed in the north-south direction on the main frame, a subframe supported on the rotating shaft, at least one solar power generation module installed on the subframe,

It is installed on the main frame and rotates along the sun from the time of sundown to the time of sunset, which is installed in the north-south direction, and tracking on the solar power generation module in a horizontal state toward the sun on a cloudy day when the sun is not exposed. It is characterized by being provided with a means.

Alternative solar power means for achieving the above object

A main frame, a rotating shaft rotatably installed on the main frame, a subframe installed on the rotating shaft, solar power modules installed on the subframe,

It is installed on the main frame to rotate the rotating shaft to adjust the angle of the sub-frame in which the photovoltaic module is installed, the angle of the photovoltaic module to form a horizontal state toward the sun on a cloudy day when the sun is not exposed Characterized in that it is provided with an adjusting means.

Alternatively, the solar cell apparatus of the present invention for achieving the above object,

A plurality of main frames installed inline in the north-south direction,

Pivoting shafts provided between the main frames, connecting means for interconnecting the pivoting shafts;

A subframe installed on the pivot shaft, a solar power module installed on the subframe,

Tracking means installed on the mainframe to rotate the subframe with respect to the mainframe and to maintain a horizontal state when the sun is not exposed;

It is installed between the sub-frame and the main frame is characterized in that it is provided with a position fixing means for fixing the rotational position of the photovoltaic module.

Solar photovoltaic power generation method for achieving the above object

A photovoltaic module preparation step of preparing a main frame, a rotating shaft installed in the north-south direction on the main frame, a subframe supported on the rotating shaft, and at least one solar power module installed on the subframe; ,

It is installed on the main frame includes a solar tracking step for rotating along the sun from the time of sundown to the time of the rotation shaft is installed in the north-south direction, in the sun tracking step, the sun on cloudy days when the sun is not exposed Characterized in that the power generation module has a tracking step to achieve a horizontal state toward the sun.

The photovoltaic device according to the change in solar radiation according to the present invention can polarize the power generation efficiency by maintaining a horizontal state of the photovoltaic module in the day when the sun is not exposed.

The photovoltaic device of the present invention is capable of generating electricity while following the sun while the sun is rising from each other in the same copper, and one embodiment thereof is shown in FIGS. 1 and 2.

Referring to the drawings, the photovoltaic device 10 includes a main frame 11 installed on the ground or a building structure, a rotating shaft 12 installed in the north-south direction on the main frame 11, and the rotating shaft. It is installed in the (12) and has a sub-frame (13) for supporting the photovoltaic module (100). The subframe 13 has a support member 13a which is supported by the pivot 12 and extends in both sides. The rotatable support of the subframe 13 with respect to the mainframe 11 is a pillow block 12a is installed on the top of the main frame 11 and the rotation to the bearing supported on the pillow block 12a The end of the coaxial 12 is rotatably supported. However, the support of the pivot shaft 12 with respect to the main frame 11 is not limited to the above-described embodiment, and a structure capable of supporting the main frame 11 so that the subframe can be rotated in the east-west direction Anything is possible. The pivot shaft 12 with respect to the main frame 11 sets the altitude that can receive the most sunlight in consideration of the solar altitude of the four seasons, the angle that the solar power module 100 can be installed at this altitude It is preferable to set so as to maintain.

The main frame 11 is provided with a tracking means 20 for tracking the pivot 12 in the east-west direction. This uniaxial tracking means 20 is provided on the worm wheel 21 provided at the end of the rotation shaft 12 and the drive shaft of the drive source 22 provided on the main frame 11, as shown in FIG. And a worm 23 for rotating the worm wheel 21 forward and backward. The drive unit 22 includes a motor 22a and a reducer 22b for reducing the rotational force of the motor 22a and transmitting the deceleration force to the worm 23. And a controller 24 having a timer for driving the motor 22a for each time zone. The control unit 24 may further include a sensor 24a that tracks the position of the sun all day and may drive the solar power module 100 to follow the sun according to the tracking unit. . The sensor may be a light amount sensor. The tracking means 20 maintains a horizontal state in a tilted state when the solar power module is in a horizontal state, that is, inclined on a rainy or cloudy day when the sun is not exposed by the control unit.

Meanwhile, in the solar cell apparatus 10 according to the present invention, as shown in FIG. 3, the main frame 11 is installed inline in the north-south direction, and the main frame 11 is connected to the main frame. The rotating shafts 12 are coaxially connected by means 30 and the rotating shafts 12 are rotated forward and reverse by the single axis tracking means 40. The connecting means 30 connecting the pivot shafts 12 is connected to a bearing on a main frame 11 positioned at a center portion of the pivot shaft 12, that is, a main frame 11 positioned between the pivot shafts 12. It has a connecting shaft 31 which is supported by and coupled to both ends of the corresponding shaft of the rotating shaft 12 to be connected coaxially. Coupling of the end of the rotation shaft 12 with respect to the connecting shaft 31 is coupled by a separate fixing means, the fixing means is a pin passing through the end of the rotating shaft 12 is coupled to the connecting shaft 31 ( 32). When the tracking means 40 is installed at the end of the rotating shaft of one side has the same structure as the above embodiment. However, the tracking means 40 may be installed in the connecting means 30 to minimize the torsional force on the connected pivot shafts 12. Although the single-axis tracking means is not shown in the drawing, a worm driven by a drive unit for installing the worm wheel and driving the connecting shaft may be engaged. The single axis tracking means may be formed of a drive gear by a drive having a gear installed on the connecting shaft, meshed with the gear, and having a brake means.

5 and 6 show another embodiment of the photovoltaic device according to the present invention.

Referring to the drawings, the photovoltaic device 50 includes a main frame 51, a rotation shaft 52 rotatably installed on the main frame 51, on which the sub frame 53 is supported, and the sub frame ( 53 is provided with a solar power module 100 is installed. Here, the rotation shaft 52 with respect to the main frame 51 is preferably installed in the east-west direction.

In addition, the main frame 51 is provided with an angle adjusting means 60 for rotating the rotating shaft 52 to adjust the angle of the sub-frame 53 in which the photovoltaic module of the rotating shaft 52 is installed. do. The angle adjusting means 60 may be composed of a worm wheel installed at the end of the rotating shaft 52 and the worm wheel meshed with the worm wheel and driven by a driving unit, such as a single axis tracking means. The angle adjusting means should be able to maintain the solar power module in a horizontal state when the rainy season or the sun is not exposed. The angle adjusting means 60 is not limited to the above-described embodiment, any structure that can adjust the angle of the photovoltaic module 100 by rotating the pivot shaft 52 according to the altitude of the seasonal sun. It is possible.

For example, the angle adjusting means 60 is a lead screw (65a) is hinged to the main frame 51, slidably installed on the main body (65a) and the end screw hinged to the sub-frame (53) 65b), a worm wheel 65c rotatably installed on the main body 65a and screwed with the lead screw 65b, and a worm 65d installed on the main body 65a and engaged with the worm wheel 65c. It is provided. Here, the upper portion of the main body (65a) is provided with a housing (65e) to which the worm wheel (65c) and the worm (65d) is coupled and protrudes to the outside of the housing of the rotation shaft of the worm can be driven by a handle or a separate drive motor have.

As described above, the solar power generation method according to the change in solar radiation using the solar power generator includes a main frame, a rotation shaft installed in the north-south direction on the main frame, a sub frame supported on the rotation shaft, and the sub frame. A solar power module preparing step of preparing at least one solar power module to be installed;

It is installed on the main frame includes a solar tracking step for rotating along the sun from the time of sundown to the time of the rotation shaft is installed in the north-south direction, in the sun tracking step, the sun on cloudy days when the sun is not exposed And a tracking step for the power generation module to be in a horizontal state toward the sun.

In the photovoltaic module preparation step, the photovoltaic module may use the power generation module mentioned in the above-described embodiment.

Referring to the operation of the photovoltaic device according to the present invention configured as described above are as follows.

In the solar cell apparatus 10 according to the present invention, when the sun rises in the east, the driving unit of the single-axis tracking means 20 is driven to rotate the pivot shaft 12 clockwise to correspond to the sun. Therefore, since the photovoltaic module 100 installed in the subframe 13 corresponds to the sun, the solar power module 100 may be exposed to sunlight as much as possible and may receive a large amount of light from the sun.

In this state, the azimuth angle changes as the sun moves along the ecliptic over time, and the azimuth angle of the solar light emitting module and the azimuth angle of the sun are recognized by the sensor, and the motor is driven according to the information of the sensor. The rotating shaft 12 is rotated at a predetermined angle. Therefore, as the solar power generation module 100 follows the sun all day, the power generation efficiency may be maximized.

In this process, since the rotation shaft 12 supported by the main frame 11 is installed in the north-south direction, the solar power generation module 100 supported by the subframe 13 thereof is rotated in the east-west direction. That is, as the sun moves along the ecliptic, the sun rotates in the east-west direction, so that the sun can follow the sun in the east-west direction while the sun is floating, thereby enabling the most efficient power generation. Such tracking of the sun can maximize the efficiency of the photovoltaic module 100 while the structure is relatively simple compared to the estimation in consideration of the orientation and altitude of the sun as in the prior art. In particular, as shown in FIG. 3, when the shaft rotated in the north-south direction is connected by the connecting means, the rotating shaft 12 may be rotated by one tracking means 20. On the other hand, when the sun is not exposed to the cloud, such as organic or rainy season, the solar power module to maintain a horizontal state. Here, the reference of whether the sun is exposed and the rainy day is used as a light amount sensor, so that the photovoltaic module can be maintained in a horizontal state when detected lower than 2 hours compared to the set amount of light incident.

Meanwhile, as shown in FIGS. 5 and 6, when the rotation shaft 52 is installed in the east-west direction, the best elevation angle for each season or period may be maintained by rotating the rotation shaft 52 in consideration of the elevation angle of the sun.

As described above, the solar cell apparatus according to the present invention may follow the sun in the trajectory of the ecliptic, ie, the east-west direction, by installing a rotation shaft in the north-south direction. On rainy days, the sun can be maximized by keeping the sun level without tracking the PV modules.

 Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and it will be understood by those skilled in the art that various modifications and equivalent embodiments are possible.

Therefore, the true scope of protection of the present invention should be defined only by the appended claims.

1 is a partial ablation perspective view showing a photovoltaic device according to the present invention;

2 is a perspective view showing the uniaxial tracking means,

Figure 3 is a partial ablation perspective view showing a photovoltaic device according to the present invention.

4 is a perspective view showing another embodiment of the uniaxial tracking means,

5 is a perspective view showing another embodiment of a photovoltaic device according to the present invention;

6 is a side view of the photovoltaic device shown in FIG. 5;

Claims (4)

A main frame, a rotating shaft installed in the north-south direction on the main frame, a subframe supported on the rotating shaft, at least one solar power generation module installed on the subframe, It is installed on the main frame and rotates along the sun from the time of sundown to the time of sunset, which is installed in the north-south direction, and tracking on the solar power generation module in a horizontal state toward the sun on a cloudy day when the sun is not exposed. Photovoltaic device according to the change in solar radiation, characterized in that provided with a means. A main frame, a rotating shaft rotatably installed on the main frame, a subframe installed on the rotating shaft, solar power modules installed on the subframe, It is installed on the main frame to rotate the rotating shaft to adjust the angle of the sub-frame in which the photovoltaic module is installed, the angle of the photovoltaic module to form a horizontal state toward the sun on a cloudy day when the sun is not exposed Photovoltaic device according to the change in solar radiation, characterized in that provided with a control means. A plurality of main frames installed inline in the north-south direction, Pivoting shafts provided between the main frames, connecting means for interconnecting the pivoting shafts; A subframe installed on the pivot shaft, a solar power module installed on the subframe, Tracking means installed on the mainframe to rotate the subframe with respect to the mainframe and to maintain a horizontal state when the sun is not exposed; Is installed between the sub-frame and the main frame photovoltaic device according to the solar radiation change, characterized in that provided with a position fixing means for fixing the rotational position of the photovoltaic module. A photovoltaic module preparation step of preparing a main frame, a rotating shaft installed in the north-south direction on the main frame, a subframe supported on the rotating shaft, and at least one solar power module installed on the subframe; , It is installed on the main frame includes a solar tracking step for rotating along the sun from the time of sundown to the time of the rotation shaft is installed in the north-south direction, in the sun tracking step, the sun on cloudy days when the sun is not exposed Solar power generation method according to the solar radiation change characterized in that it comprises a tracking step for the power generation module to form a horizontal state toward the sun.

Images