JP2006060180A - Solar power generating system for automatically tracking sunlight - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a solar power generation system for automatically tracking sunlight, whereby the sunlight is automatically tracked and the maximum power generation of a solar battery is obtained, the power generation system for generating the power of a light-receiving sensor control unit by itself, eliminating the need for standby power consumption of all the control units, and being installed with low cost and high efficiency. <P>SOLUTION: The solar generation system for automatically tracking sunlight is configured, such that a plurality of small solar batteries are used as light-receiving sensor control power supplies, a motor control unit is mounted which changes the orientation of a solar module to an orientation that faces sunlight, the light-receiving sensor control unit is mounted which transmits the orientation facing sunlight to the motor control unit, a limit switch is mounted which drives the solar module of a body to the south direction, acting as the origin point of the present invention and stops and switches the module on standby, when power generated by the light-receiving sensor control unit reaches a predetermined value or less, and the solar module, a stage for driving, and the light-receiving sensor control unit can be easily separated from one another. The orientation facing sunlight which act as the maximum output point of the solar module is automatically tracked. <P>COPYRIGHT: (C)2006,JPO&NCIPI

Description

  The present invention relates to an automatic solar tracking solar power generation system for automatically tracking sunlight, always facing sunlight and a solar module, and stably obtaining maximum generated power.

  Conventional solar tracking devices can be operated in accordance with the change in the direction of the sun by an external power source, controlled by a light sensor or computer, or can be adjusted to the direction of the sun by moving the control unit with a built-in power source. And the one that adjusts to the change in the direction of the sun by power generation using only the solar module. When using an optical sensor or computer, an external power supply is required, so it does not meet the zero needs of solar power generation. In addition, in the clockwork and the control by the built-in power source, power consumption due to standby power is consumed, so that power stored by power generation is consumed. According to Japanese Patent Application Laid-Open No. 2004-146760, in a tracking device based on power generation using only a solar module, a structure in which a shielding plate is provided at the center of two modules, and a configuration for tracking sunlight by a power difference in the shielded part, However, the fact that an electric power difference is caused in the solar module main body will reduce the efficiency of the generated power. In addition, on a cloudy day or when the sun is covered with a thin cloud, if you can face it even in the direction of sunlight, you can get a power generation, although not the maximum, but according to the prior art In many cases, the power generation efficiency is lowered when the sun has come out and is in a standby state, or when the sun moves to the east or sunrise direction and stands by. Also, when installing in a mountainous area, a remote island, the sea, etc., the installation location is limited in the conventional structure. Installed on a mountainous area or on a remote island around flat places or places where it is installed, where there are trees or places where there are no obstacles that can prevent sunlight from reaching the main body tracking device. Becomes very difficult. From the above, what meets the needs of solar tracking devices does not yet exist. Low cost, easy installation, no need for external power supply, can be installed regardless of the conditions of mountainous areas, remote islands, and places, can always obtain the maximum generated power in that situation, high efficiency power generation We need something that makes it possible.

  In view of the above points, the present invention eliminates the need for an external power source, and automatically starts in the early morning and automatically moves to a direction where power can be generated even when it is cloudy. The purpose is to provide an automatic tracking solar power generation system. The problem of the invention is to always face the entire surface of the cell that receives sunlight, to increase the power generation efficiency by the cell to the maximum, and to have a structure that can be installed without harming nature in mountainous areas, remote islands, the sea, etc. It is to provide a low-cost, high-efficiency automatic solar tracking solar power generation system by simplifying the control device.

  In order to solve the above-described problems, the present invention, a solar automatic tracking solar power generation system, includes a solar module mounted in a driving unit, a horizontal driving unit so as to track while facing sunlight, an elevation driving unit that drives to an elevation angle, and drive control. And a light receiving sensor control unit composed of a plurality of small solar cells. When sunlight directly faces a small solar cell installed in the light receiving sensor control unit, electric power for starting the light receiving sensor control unit is obtained and the light receiving sensor control relay is operated. By using the contacts of the small control relay of the light receiving sensor control unit and configuring the light receiving sensor control unit and the motor control unit with a separate circuit, the standby power of all the control units waiting for operation is set to “0”. Made possible. Since the operation of the light receiving sensor control unit is operated by power generation of a small solar cell, the light receiving sensor control unit can be started by power generation of the small solar cell without using an external power source or a built-in power source.

  In the present invention, when sunlight is interrupted by sunset, bad weather, cloudy weather, etc., it automatically stands by to move to a position of 45 ° southward. By waiting in the south direction, even when the mobile power of the light receiving sensor control unit cannot be secured, the power generation efficiency by the main body solar module can be increased and stored. In addition, the light receiving sensor control unit is composed of a shielding plate that shields a plurality of small solar cells other than sunlight, and the solar cell in the light receiving sensor control unit uses a small solar cell of about “50 mm × 30 mm” for control. By using a small control unit for the unit, high-efficiency power generation is possible with a low-cost configuration.

  The solar automatic tracking solar power generation device of the present invention having the above-described configuration is an external power source because it constitutes a small solar cell as a solar light tracking sensor and a light receiving sensor control power supply instead of the light sensor in the prior art, No internal power supply is required for the light receiving sensor control unit. In addition, since a small solar cell is used, the operation relay and the like in the light receiving sensor control unit are miniaturized, so that the light receiving sensor control device is excellent in portability and low in cost. When sunlight is blocked by clouds, the light receiving sensor control unit detects a decrease in the amount of power generated by the small solar cell, drives it to the south, and waits. By waiting in the south direction, the power generation by the main body solar module at the time of cloudy can be efficiently performed on average. Moreover, the same operation as described above is performed at sunset, and when the morning sun rises, it can be quickly driven in the direction facing the sun, and power can be generated by the main body solar module. Even when the clouds that have covered the sunlight disappear due to changes in the weather, it is possible to quickly move in the direction facing the sunlight and perform the most efficient power generation.

Hereinafter, practical example 1 according to the present invention will be described with reference to the drawings. The automatic solar tracking solar power generation system according to the practical example, according to the back view in FIG. 1, captures the direction of sunlight, sunset, cloudy weather due to weather changes, etc. (Z) light receiving sensor control device, (2) A horizontal drive DC gear motor driven by this, and a high-strength ball screw arm type DC gear motor for preventing breakage due to strong winds and the like, and controlling the horizontal drive and elevation drive (5 (R) Limit switch to stop driving in the same direction as the installation direction of the small solar cell of the light receiving sensor control unit (Z) for horizontal drive and elevation drive driven by the motor control unit. Is provided.
Note that a storage battery is used as the DC motor drive power source.

  FIG. 2 is a configuration diagram of the light receiving sensor control unit. As shown in FIG. 2- (1), the horizontal driving light-receiving sensor unit operates by power generation using a plurality of small solar cells S1 to S6, a shielding plate 6 that shields the solar direct orientation other than ± 15 °, and a small solar cell. The light receiving sensor control unit {circle over (3)}. For installation of small solar cells, the azimuth as the base point is determined, and power generation of the small solar cells is possible up to ± 15 ° of the direct sunlight range in each direction of east, southeast, south, southwest, west, northwest. Thus, six shielding locations are provided, and one small solar cell is installed at each of the shielding locations. Small solar cells that generate power in the range of ± 15 ° facing sunlight are always installed so that there is only one sheet. Depending on the position of the small solar cell that is generating power, an optional control relay works and motor drive control The main body solar module FIG. 1-X drives the solar light in accordance with the position of the small solar cell that is transmitted to the part view 1-5 and directly faces the sunlight and generates power.

  As shown in FIG. 2-2, the small angle solar cells S 7, S 8, S 9 generate power only when the sunlight is radiated at a position of 0 ° to 30 °. Small solar cells that can generate electricity at a position of 0 ° to 30 ° are installed one by one at three locations in the east, south, and west, and one solar cell S10 that generates power at a position of 50 ° to 80 ° is installed. From this, when the sunlight irradiation angle is located at 0 ° to 30 °, the small solar cell generates power, and when the elevation angle is driven, the main body solar module FIG. 1-X waits at the position of the elevation angle 30 °, and the sunlight irradiation angle 50 If the position is between -80 °, the main body solar module FIG. 1-X moves to an elevation of 70 °. In addition, in the case of a solar irradiation angle in the range of 30 ° to 50 ° where the small solar cell for elevation drive does not generate electricity, the main body solar module FIG. 1-X is set to drive and stand by at a position of 45 °. Yes. In addition, the range of the sunlight irradiation angle shown above is the power generation range of the main body solar module, and is within the power generation range in which power generation can be performed without reducing the power generation efficiency.

  The installation of small solar cells

In total, there are 10 locations. This is the horizontal elevation angle drive range of the main body solar module FIG. 1-X, and each stop standby position is defined. Regarding the operating environment of the small solar cell of the light receiving sensor unit and the relay for controlling the light receiving sensor, when sunlight directly faces the small solar cell, it generates 5V36mA and satisfies the electromotive force 5V30mA of the light receiving sensor control relay. Operate.

  Next, the operation circuit in the light receiving sensor control unit FIG. 2- (3) will be described with reference to FIGS. FIG. 3 is a control internal operation circuit diagram at the south azimuth origin stop position. When the small solar cells (FIGS. 2 S1 to S10) are not generating power (sunset or cloudy), the control relay is turned OFF, and through the control relay B contact of each sensor, it becomes a state conduction circuit and contacts B, C, It is a circuit diagram which will be in a south direction stop standby state by D, E, and F by the south direction stop limit switch RS. FIG. 4 is a control internal operation circuit diagram at the east azimuth stop standby position. When a small solar cell installed in the east direction receives sunlight in the opposite direction and a current value flows, the control relay A1 operates through the backflow prevention diode, the motor control relay operates, and the DC gear motor -2 is turned on and driven horizontally, the limit switch ERS installed in the east direction operates, the motor control circuit is shut off and stopped at that position. The maximum power generation of the main body solar module can be performed. Even if the elevation drive stop position reaches 30 °, 45 °, or 70 °, the drive is performed by the same circuit operation. The origin in elevation drive is 45 °, which is the same as the circuit configuration described above.

"Other embodiments"
The solar automatic tracking solar power generation system of the present invention of practical example 2 has a circuit configuration similar to that of practical example 1, but as shown in FIG. 5 (FIG. 1-X) with the main body solar module (FIG. 1). -Y) Since the stand can be easily separated, it is possible to install the main solar module (Fig. 1-X) on a pole etc. as shown in FIG. Even in a place where it is difficult to receive light, it can be easily installed at a high place as shown in FIG. 5, so that a stable power generation amount can be obtained. Note that the same installation method as described above is also possible in the light receiving sensor control device.

"Effect of embodiment"
As described above, the present invention, the solar automatic tracking solar power generation system has a separated structure, so that it can be installed without problems even in a place where it is difficult to install with the structure of the prior art, and the optimum installation in that place is possible. It is possible. Furthermore, since it is possible to generate electricity more accurately and efficiently in response to fluctuations in sunlight irradiation and worsening weather, the amount of power generated by solar cells is mostly stored in storage batteries when there is always sunlight irradiation. Things are possible. There is no need for external or internal power supply in the light receiving sensor control device, and the origin stop standby direction is set to the south direction, so that power generation efficiency can be improved over the conventional technology, and the entire control unit is configured with a simple device. By doing so, it is possible to provide a low-cost and highly efficient solar automatic tracking solar system.

It is a whole block diagram which shows the example 1 of practice of this invention. It is an internal structure figure of the light reception sensor control apparatus of this invention. It is a control circuit diagram which shows the specific example of this invention. It is a control circuit diagram which shows the specific example of this invention. It is a block diagram which shows the practical example 2 of this invention.

Explanation of symbols

(1) Ball screw arm DC gear motor (2) DC gear motor (3) Elevation angle rotation shaft (4) Horizontal rotation shaft (5) Motor drive controller (6) Shield plate (X) Main body solar module (Y) Base ( Z) Light sensor control device (R) Limit switch part (1) Horizontal drive sensor part (2) Elevation angle sensor part (3) Light sensor control part (S1 to S10) Small solar cell ( ERS) East direction, stop limit switch (RS) South direction, stop limit switch (AF) Light receiving sensor, relay contact.
(RY) Manual release relay (P) Pole (W) Support material

Claims (1)

A motor control unit (5) that uses a plurality of small solar cells (S1 to S10) as a light-receiving sensor control power source and changes the orientation of the main body solar module (X) to the direct sunlight orientation of the present invention, and the motor control When the power generation amount of the light receiving sensor control unit (Z) and the light receiving sensor control unit (Z) for transmitting the sunlight facing direction to the unit (5) is below a predetermined position, the orientation of the main body solar module (X) A limit switch (R) for driving in the south direction as the origin of the present invention and stopping and waiting is installed, the main body solar module (X), a gantry (Y) for driving, and the light receiving sensor control The part (Z) has a structure that can be easily separated, and the solar direct orientation that is the maximum output point of the main body solar module (X) is automatically tracked. Solar automatic tracking solar power generation system.

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