KR20160135127A - System for tracking type floating photovoltaic system and the tracking method by the same - Google Patents
System for tracking type floating photovoltaic system and the tracking method by the same Download PDFInfo
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- KR20160135127A KR20160135127A KR1020150068416A KR20150068416A KR20160135127A KR 20160135127 A KR20160135127 A KR 20160135127A KR 1020150068416 A KR1020150068416 A KR 1020150068416A KR 20150068416 A KR20150068416 A KR 20150068416A KR 20160135127 A KR20160135127 A KR 20160135127A
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- power generation
- sun
- generation system
- solar
- winch
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- 238000000034 method Methods 0.000 title claims abstract description 28
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S20/00—Supporting structures for PV modules
- H02S20/30—Supporting structures being movable or adjustable, e.g. for angle adjustment
- H02S20/32—Supporting structures being movable or adjustable, e.g. for angle adjustment specially adapted for solar tracking
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/165—Indicating that current or voltage is either above or below a predetermined value or within or outside a predetermined range of values
-
- G—PHYSICS
- G08—SIGNALLING
- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C19/00—Electric signal transmission systems
- G08C19/02—Electric signal transmission systems in which the signal transmitted is magnitude of current or voltage
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S30/00—Structural details of PV modules other than those related to light conversion
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02S—GENERATION OF ELECTRIC POWER BY CONVERSION OF INFRARED RADIATION, VISIBLE LIGHT OR ULTRAVIOLET LIGHT, e.g. USING PHOTOVOLTAIC [PV] MODULES
- H02S50/00—Monitoring or testing of PV systems, e.g. load balancing or fault identification
- H02S50/10—Testing of PV devices, e.g. of PV modules or single PV cells
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
Abstract
Description
The present invention relates to a photovoltaic solar photovoltaic power generation system and a tracking method thereof, and more particularly, to a solar photovoltaic power generation system and a method of tracking the same using at least one photoconductive cell, The present invention relates to a method and an apparatus for improving the power generation efficiency of a solar power generation system by controlling the position and orientation of the solar panel automatically so that the direction of the solar panel installed in the system receives the largest amount of sunlight.
A water PV system is a system that is installed on the water surface of an artificial dam, a reservoir or a freshwater lake, and consists of a float and a mooring system, a solar tracking system, a solar module, and an electric system.
Generally, in the case of solar photovoltaic systems installed on the ground, damage to forests is a serious problem because a large area is required to install a solar power plant. On the other hand, since the water PV system is installed on the water surface such as an artificial dam and a reservoir, forest damage is not caused to secure the ground. In addition, there is an advantage that the power generation efficiency is increased due to the cooling effect that the power generation efficiency is not lowered due to the geothermal heat and the solar module temperature is cooled down even in the summer due to the low temperature of the water surface.
In addition, solar power generation is classified into a fixed type, in which the angle of the solar module is fixed at a certain angle, and a tracking type, in which the sun's direction and altitude are tracked so that the sunlight is received at right angles to the module surface. Tracked solar power generation is a high-efficiency power generation system in which a solar module generates a larger amount of electric power by adding a tracking function to track the sun in real time. Generally, it is known that the power generation of the tracking system is more than 30% higher than that of the stationary system. This improvement in power generation efficiency can be sufficiently predicted even in a water solar power generation system.
The tracking solar PV system can be programmed to track the sun position by determining whether the sun sensor has valid sunlight and to track the sun precisely even in the cloud or rain. However, in order to achieve this, it is necessary to rotate the solar module using a separate mechanical device, and the number of the unit solar modules that can be rotated at one time is limited, and frequent troubles are required for maintenance. These problems cause even more problems on the ground.
On the other hand, since the external force including the self weight of the structure is transferred to the water through the buoyant body in the direction of gravity, the length of the structure that can resist the gravity direction can be determined relatively freely compared to the ground type. In addition, because it floats in the water, it can move and rotate with a small energy even for a relatively large power generation system. Therefore, when the tracking system is applied to the floating floating solar system, The probability of failure is reduced.
In addition, data of solar photovoltaic generation, temperature and humidity, solar radiation, wind velocity, wind direction, solar tracking sensor, etc. of traceable solar photovoltaic are very important factors. Such data is transmitted to a wireless network and monitored. However, there is a disadvantage that the initial investment cost and maintenance are difficult, and the additional monitoring is costly.
Korean Patent No. 1298633 (Apr. 13, 2013) discloses a photovoltaic device capable of floating on the surface of a lake, a river, a swimming pool, a pond, and the like, as an existing prior art document related to this technical content. The present invention provides a water float type photovoltaic power generation apparatus that efficiently utilizes land resources and changes the arrangement of solar cell panels according to a change of sun position to improve efficiency. A position tracking unit for detecting a position of the light from the plurality of solar cell structures, a position tracking unit for transmitting a measurement value tracking the position of the light, A pan tilt driving unit provided between the float table and the driving table for rotating the driving table; And a control unit connected to the enemy detection unit and the pan / tilt drive unit for controlling the operation of the pan / tilt drive unit so that sunlight is simultaneously incident on each solar cell panel of the plurality of solar cell structures at a maximum, The technical features of this prior art include a case member which is located at one side of the solar cell panel to allow sunlight to flow therein, and a solar cell which is positioned inside the case member and is adapted to receive sunlight introduced through the case member And a sensor member disposed on each of the three surfaces of the light receiving member to generate a detection signal while detecting a difference in the amount of sunlight incident on the three surfaces and tracking the position of the sunlight.
Korean Patent No. 1398292 (Apr. 25, 2015) discloses a tracking-type floating-floating photovoltaic power generation apparatus. In order to cope with the change of the azimuth of the sun, A rotating part fluid for rotating the solar cell module is provided inside the fluid to easily track the sun by a small power, and a plurality of rotating parts fluids are rotated together by a single motor to easily manage the solar tracking of the plurality of solar cell modules, The present invention relates to a tracking-type floating-suspended photovoltaic power generation device capable of raising a solar cell.
These prior art documents belong to the technical field similar to the present invention in that they relate to a solar tracking aquarius solar photovoltaic power generation system, but the prior arts have a problem that the resistance changes according to the light incident from the sun, And it does not suggest the technology to track the position of the sun through this. Accordingly, the present invention is to track the position of the sun and to control the solar module or the entire solar power generation system of the solar power generation system to move in the same distance and direction as the sun moves in real time, thereby maximizing the power generation efficiency And the device. In addition, it is difficult for people to approach the PV system for maintenance, so we can remotely monitor and maintain PV system to provide a means to manage power generation system more efficiently .
The present invention has at least one photoconductive cell and measures the movement of the sun by applying voltage to each photoconductive cell to measure the current value flowing through each photoconductive cell and the change in the value of the current And to provide a photovoltaic solar photovoltaic power generation system.
Further, the present invention can detect the current change of at least one photoconductive cell and utilize it as control information for adjusting the position of the photovoltaic power generation system, so that the direction in which the photovoltaic panel faces toward the sun depends on the generation efficiency To maximize the power generation efficiency of the photovoltaic power generation system by automatically controlling the photovoltaic power generation system to be the largest direction. In the present invention, even if the sun and the solar panel are not perpendicular to each other, the direction and attitude of the power generation system and the panel can be tracked so that the power generation efficiency is the highest.
In addition, in changing the position of the solar power generation system, the present invention drives a winch or a propeller so as to gradually move the hull of a floating material in real time as well as a solar panel, thereby maximizing the power generation efficiency of the solar power generation system. And to provide such a device.
In addition, the present invention has a wired / wireless communication interface for remotely monitoring and controlling the status of the tracking type photovoltaic power generation system. A user or a manager accesses a power generation system or a management server via the web through a wired / And to provide a means for monitoring or controlling the state of the device.
According to an aspect of the present invention, there is provided an aquatic solar power generation system including: a sun position estimating unit that estimates a position of a sun using at least one photoconductive cell; And a position control unit for controlling the position of the solar photovoltaic system so that the photovoltaic panel installed in the aquamarine solar power generation system is directed to the estimated sun position, And the power generation efficiency is improved by changing the position of the power generation system.
The solar photovoltaic system further includes at least one drive unit for moving the aquifer generation system in accordance with the control, the drive unit including driving a device including a winch, a propeller, or a combination thereof .
Further, when the driving unit uses a winch, the driving unit further includes at least one anchor connected to the winch by a wire, and the driving unit winds the wire rope in the winch under the control of the control unit, And the position of the solar power generation system is moved to a desired position.
The sun position estimating unit may measure each current flowing through the at least one photoconductive cell and estimate the position of the sun in accordance with the measured current value and the measured current value.
Further, the position control unit may be provided in each winch or propeller so as to control the aeration solar power generation system to move as much as it corresponds to the sun position information, or to control how much each winch or propeller operates at the center through the sun tracking control unit And the like.
According to another aspect of the present invention, there is provided a method for improving power generation efficiency of a photovoltaic power generation system, including: a solar position estimation step of estimating a position of a sun using at least one photoconductive cell; And a control step of changing a position of the photovoltaic power generation system so that the photovoltaic panel installed in the aquamarine solar power generation system is directed to the estimated sun position.
The method may further include driving an apparatus including at least one winch, a propeller, or a combination thereof to change the position of the aquatic power generating system.
In addition, when driving the winch, the position of the photovoltaic power generation system is changed to a desired position by winding and loosening the wire rope connected between the winch and the anchor.
The solar position estimating step may include: measuring each current flowing through at least one photoconductive cell; And estimating a position of the sun according to the measured current value and the current value.
In addition, the control step may be performed such that control is performed so that the aeration solar power generation system is moved as much as the position information of the sun corresponds to the driving part of each winch or propeller, or the operation of each winch or propeller through the central control part And a control unit for controlling the control unit.
The present invention relates to a solar photovoltaic solar photovoltaic power generation system and a tracking method thereof, and more particularly, to a solar photovoltaic power generation system and a method of tracking the same using solar photovoltaic cells, There is an effect that the power generation efficiency of the solar power generation system is improved by controlling the position and the posture to be automatically adjusted so that the direction of the optical panel receives the largest amount of sunlight.
1 is a conceptual diagram showing the overall structure and operation principle of a photovoltaic solar photovoltaic generation system according to an embodiment of the present invention.
2 is a block diagram of a solar tracking control apparatus for improving power generation efficiency of a solar photovoltaic solar photovoltaic power generation system according to an embodiment of the present invention.
FIG. 3 is a conceptual diagram for performing the position estimation of the sun using the photoconductive cell array of the photovoltaic solar photovoltaic power generation system according to an embodiment of the present invention.
FIG. 4 is a flowchart illustrating a method of improving power generation efficiency of a photovoltaic solar photovoltaic generation system according to an embodiment of the present invention.
BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail with reference to the preferred embodiments of the present invention with reference to the accompanying drawings.
In the drawings, the same reference numerals denote the same elements. Furthermore, specific structural and functional descriptions for embodiments of the present invention are presented for the purpose of describing an embodiment of the present invention only, and, unless otherwise defined, all terms used herein, including technical or scientific terms Have the same meaning as commonly understood by those of ordinary skill in the art to which the present invention belongs. Terms such as those defined in commonly used dictionaries are to be interpreted as having a meaning consistent with the contextual meaning of the related art and are to be interpreted as ideal or overly formal in the sense of the art unless explicitly defined herein Do not.
First, the structure of a solar photovoltaic power generation system will be described, and a structure to which the present invention is applied will be described.
The ordinary water power generation facilities are divided into a frame type and a buoyancy type. The frame type is a structure in which an aluminum profile or an FRP (Fiber Reinforced Plastics) H beam is assembled and a buoyant material is connected to the bottom. In addition, the buoyancy integral type is a structure in which a float supporting the buoyancy passage module is integrated with a PE (polyethylene) material which is easy to be formed.
Although the frame type has a high structural stability and can be designed to have a high module inclination angle (for example, 33), it has a high utilization rate of power generation. However, in a region where the construction cost is high and the maximum design external pressure should be considerably large (mainly, , Buoyancy integrated type reduces the module inclination angle (eg 12 ~ 20) and reduces the vertical and vertical wind loads acting as the maximum design external pressure. The power generation utilization rate drops, but the construction cost is less than the frame type.
In contrast to the land-track type solar photovoltaic system, the tracking system has a difficulty in simultaneously considering the upward and downward movements due to the water depth change in addition to the movement due to the movement of the sunlight. Therefore, Is underway.
Accordingly, the present invention can be applied to both a frame type and a buoyancy integrated type, and it is possible to maximize the power generation efficiency by controlling the angle or tilt of the entire floating suspension, as well as the angle of the individual solar panel. It also provides a means to enable monitoring and control of the power generation system so that it can operate remotely in a stable manner to suit the size of a given power generation system. For example, to adjust the angle of a solar panel of a photovoltaic system installed in a floating suspension, it is possible to control the inclination of the entire solar panel to face the sun as much as possible using a winch installed on all sides. That is, even when the inclination angle of the module is low, the power generation efficiency can be further improved by controlling the winch. It provides a web-based monitoring and control interface to monitor, manage and control when such control affects the safety of the entire system.
1 is a conceptual diagram showing the overall structure and operation principle of a photovoltaic solar photovoltaic generation system according to an embodiment of the present invention.
1, a photovoltaic solar photovoltaic
Each
The aquarium
It is also possible to use the winch and the propeller at the same time to quickly move the water power generation system to a desired position.
As a method for moving the hull of the floating suspension, the driving unit may be placed on the
In addition, the aquatic solar
Of course, the
The
The aquarium
Hereinafter, the
2 is a block diagram of a solar tracking control apparatus for improving power generation efficiency of a solar photovoltaic solar photovoltaic power generation system according to an embodiment of the present invention.
2, the
The sun
Hereinafter, a method of estimating the position of the sun using the photoconductive cell will be described. Of course, in the present invention, a photoconductive cell is described as an embodiment. However, any device capable of tracking the position of the sun by sensing a change in current using an optical device is a concept included in the technical idea of the present invention. That is, when the photoelectric effect is used, it corresponds to a device for controlling the flow of current according to the amount of light. Therefore, all devices utilizing such photoelectric effect can be utilized in the present invention, and this is within the technical scope of the present invention.
FIG. 3 is a conceptual diagram for performing the position estimation of the sun using the photoconductive cell array of the photovoltaic solar photovoltaic power generation system according to an embodiment of the present invention.
As shown in FIG. 3, a plurality of photoconductive cells may be configured as an array to sense a change in current according to the movement of the sun. For example, a photoconductive cell is a device that plays a role of a variable resistance according to the amount of sunlight, and corresponds to a kind of illuminance sensor. In other words, the photoconductive cell where the sunlight is detected the most is the lowest resistance. When the same resistance and voltage are applied to a plurality of photoconductive cells, a change in current can be sensed.
That is, since the resistance of the photoconductive cell most exposed to sunlight is lowest, the current flowing through the photoconductive cell will be the largest. In other words, it can be seen that the position of the sun is located on the side where the photoconductive cell with the largest current flows. When the current flowing through the plurality of photoconductive cells is sensed with the same voltage applied to each terminal as shown in FIG. 3, the position of the sun can be tracked.
In FIG. 3, (a) is a photoconductive cell in which a large amount of current flows, and the current gradually decreases toward (b) and (c). Tracking changes in this current flow can track real-time tracking of the sun's motion.
It is possible to precisely track the movement of the sun by constructing an array of such photoconductive cells in three dimensions and sensing the current flowing through each photoconductive cell.
The movement of the sun thus tracked can be calculated directly from the photoconductive cell and remotely transmitted via the communication interface. Otherwise, only the current value may be extracted, and the result may be transmitted remotely. It is possible to apply various changes according to the implementation. Such information can be exchanged with each other using short-range wireless communication (NFC, Zigbee, Bluetooth, IrDa), and it is also possible to transmit and receive information using a beacon signal.
Further, the solar
The
In addition, the solar
When the
Next, the water photovoltaic power generation system according to the present invention is installed and operated in a water tower, so that maintenance, repair, management, or control is more difficult than a power generation system installed on the ground. The state of the power generation system is monitored using wired / wireless communication means, It is also possible to update various setting information necessary for the operation of the power generation system through the control function, and also to directly move the winch or the propeller to the desired position by the manager. In other words, in the event of a failure of the entire power generation system, the manager may operate the winch or propeller and transfer the power generation system to a shallower area and repair the fault.
In addition, state and history information including various state information, maintenance information, and failure information of the photovoltaic power generation system is transmitted to the solar power generation
Here, the PV
FIG. 4 is a flowchart illustrating a method of improving power generation efficiency of a photovoltaic solar photovoltaic generation system according to an embodiment of the present invention.
As shown in FIG. A method for improving power generation efficiency of a photovoltaic power generation system is to measure each current flowing through at least one photoconductive cell (S110). Next, the position of the sun is estimated according to the change of the measured current value and the current value (S120).
Through this process, control is performed to change the position of the photovoltaic power generation system so that the photovoltaic panel installed in the photovoltaic power generation system is directed to the estimated position of the sun.
In order to do this, a command is generated to direct the solar panel installed in the aquarius solar power generation system to the estimated sun position (S130). Next, an apparatus including at least one winch, a propeller, or a combination thereof is driven (S140).
As described above, according to the present invention, at least one photoconductive cell is used to detect a change in current due to the movement of the sun and to automatically detect the direction of the solar panel installed in the aquarium power generation system, So that the power generation efficiency of the solar power generation system can be improved.
While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed embodiments, but, on the contrary, I will understand the point. Accordingly, the technical scope of the present invention should be determined by the following claims.
100: Water PV system 200: Mooring line (wire rope)
300: Anchor 110: Winch (or propeller)
120: solar panel 130: solar tracking control device
131: photoconductive cell array 132: sun position estimating unit
133: Position control unit 134:
135: Monitoring control unit 136: Network interface unit
140: control line 150: control line
400: solar power system management server 500: database
600: User terminal
Claims (10)
A sun position estimating unit estimating a position of the sun using at least one photoconductive cell; And
And a position control unit for controlling the position of the solar power generation system so that the solar panel installed in the aquamarine solar power generation system is directed to the estimated sun position,
Wherein the power generation efficiency is improved by changing the position of the solar photovoltaic power generation system according to the position of the sun.
In the photovoltaic solar photovoltaic power generation system,
And at least one drive unit for moving the aquamarine solar power generation system according to the control,
Wherein the drive comprises driving a device comprising a winch, a propeller, or a combination thereof.
Wherein when the driving unit uses a winch, the driving unit further includes at least one anchor connected to the winch by a wire, the driving unit winds the wire rope in the winch under the control of the control unit, And moving the position of the solar power system to a desired location.
Wherein the sun position estimating unit comprises:
Measuring the current flowing through at least one photoconductive cell and estimating the position of the sun in accordance with the measured current value and the change in the current value, .
The position control unit,
Each winch or propeller is provided to control the water solar power generation system to move as much as it corresponds to the position information of the sun,
Or the sun tracking control unit to determine how each winch or propeller will operate in the center.
A sun position estimating step of estimating a position of the sun using at least one photoconductive cell; And
And a control step of changing a position of the photovoltaic power generation system so that the photovoltaic panel installed in the aquamarine solar power generation system is directed to the estimated sun position. A method for improving power generation efficiency.
The method comprises:
Driving a device comprising at least one or more winches, propellers, or a combination thereof to change the position of the aquatic solar power generation system. ≪ RTI ID = 0.0 > How to improve efficiency.
Wherein when the winch is driven, the position of the photovoltaic power generation system is changed to a desired position by winding and loosening the wire rope connected between the winch and the anchor, Thereby improving the power generation efficiency of the power generator.
Wherein the sun position estimating step comprises:
Measuring each current flowing through at least one photoconductive cell; And
Estimating a position of the sun according to the measured current value and the current value;
Wherein the solar power generation system further comprises a solar cell module.
Wherein the control step comprises:
Control is performed so that the aquamarine solar power generation system moves as much as the position information of the sun corresponds to the driving part of each winch or propeller,
Or the central control unit to control how much each winch or propeller will operate. ≪ Desc / Clms Page number 13 >
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| KR1020150068416A KR101745877B1 (en) | 2015-05-16 | 2015-05-16 | System for tracking type floating photovoltaic system and the tracking method by the same |
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| KR1020150068416A KR101745877B1 (en) | 2015-05-16 | 2015-05-16 | System for tracking type floating photovoltaic system and the tracking method by the same |
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| KR101946213B1 (en) * | 2018-09-20 | 2019-02-08 | 이도익 | Floating solar power generating system |
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| KR100836870B1 (en) * | 2006-12-08 | 2008-06-11 | 한국항공우주연구원 | Cylindrial type solar tracking apparatus by photodiode and the photovoltaic driving system using thereof |
| KR100999934B1 (en) * | 2010-09-09 | 2010-12-09 | (주)한국스카다 | Floating solar power generating system using geomagnetic sensor and controlling method thereof |
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