CN108988762A - A kind of tracing type photovoltaic bracket control system and its control method - Google Patents

A kind of tracing type photovoltaic bracket control system and its control method Download PDF

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Publication number
CN108988762A
CN108988762A CN201810650596.8A CN201810650596A CN108988762A CN 108988762 A CN108988762 A CN 108988762A CN 201810650596 A CN201810650596 A CN 201810650596A CN 108988762 A CN108988762 A CN 108988762A
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China
Prior art keywords
tester
control system
controller
photovoltaic bracket
axis
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CN201810650596.8A
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Chinese (zh)
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CN108988762B (en
Inventor
王涛
屈道宽
闫树兵
王素梅
高琰
侯圣勇
王广洲
房庆圆
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Shandong Institute Of New Energy Co Ltd Hao
Shandong Polytechnic College
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Shandong Institute Of New Energy Co Ltd Hao
Shandong Polytechnic College
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Priority to CN201810650596.8A priority Critical patent/CN108988762B/en
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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
    • G05—CONTROLLING; REGULATING
    • G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
    • G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
    • G05F1/66—Regulating electric power
    • G05F1/67—Regulating electric power to the maximum power available from a generator, e.g. from solar cell
    • 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
    • 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
    • Y02E10/56—Power conversion systems, e.g. maximum power point trackers

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  • Engineering & Computer Science (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Sustainable Development (AREA)
  • Sustainable Energy (AREA)
  • Power Engineering (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • General Physics & Mathematics (AREA)
  • Radar, Positioning & Navigation (AREA)
  • Automation & Control Theory (AREA)
  • Photovoltaic Devices (AREA)

Abstract

The invention discloses a kind of tracing type photovoltaic bracket control system and its control methods.Tracing type photovoltaic bracket control system includes the double-axis tracking formula photovoltaic bracket system for being used to support photovoltaic module, ambient lighting control system, the ambient lighting control system includes ambient light illumination tester, controller, and the double-axis tracking formula photovoltaic bracket system includes transmission case, pitching movement angular transducer, horizontally rotates angular transducer；And the pitch angle of photovoltaic module, level angle information are passed into controller in real time, and the transmission case of the output result control double-axis tracking formula photovoltaic bracket system of combining environmental illuminance tester is modulated control to the angle of photovoltaic module.Tracing type photovoltaic bracket control system and control method use tracing type photovoltaic component just to carry out rotation tracking when needed, reduce energy loss.

Description

A kind of tracing type photovoltaic bracket control system and its control method
Technical field
The present invention relates to field of photovoltaic power generation, especially a kind of tracing type photovoltaic bracket control system and its control method.
Background technique
Automatic tracking type photovoltaic support system can automatically track position of sun, make the photovoltaic being fixed on bracket The component moment face sun, farthest receives solar radiation convenient for component, to increase power benefit, this is for high latitude Degree area is especially apparent.Photovoltaic generating system automatic tracking system is generally realized by timed manner, by photovoltaic module settlement The solar year motion trace data input system of geographic location, photovoltaic module according to setting time automatic adjustment pitch angle and Horizontal angle realizes the vertical incidence of sunlight.Under this kind of control model, if encountering rainy weather ambient lighting variable quantity very little In the case where, it can also work according to setpoint frequency, increase the abrasion of mechanical moving element, mechanical moving element frequently turns The dynamic raising that can all cause faults itself rate, largely influences its service life.
Summary of the invention
In order to solve the deficiencies in the prior art, the invention proposes a kind of tracing type photovoltaic bracket control system and its controls Method.
The present invention adopts the following technical scheme:
A kind of tracing type photovoltaic bracket control system, the double-axis tracking formula photovoltaic bracket system including being used to support photovoltaic module System, ambient lighting control system, the ambient lighting control system includes ambient light illumination tester, controller, double-axis tracking Formula photovoltaic bracket system, ambient light illumination tester are all connected with controller；
The double-axis tracking formula photovoltaic bracket system includes transmission case, pitching movement angular transducer, horizontally rotates angle Sensor；
Ambient light illumination tester includes solar irradiance sensor and ambient light illumination base of measuring equipment, ambient light illumination Base of measuring equipment drives solar irradiance sensor to track day；
The pitching movement angular transducer horizontally rotates angular transducer, solar irradiance sensor connection controller, And the pitch angle of photovoltaic module, level angle information are passed into controller in real time, and combining environmental illuminance tester Solar irradiance sensor outputs control the transmission case of double-axis tracking formula photovoltaic bracket system to the angle of photovoltaic module into Row modulation control.
Further, the double-axis tracking formula photovoltaic bracket system further includes column, provides east-west direction rotary motion Vertical rotation axis provides the horizontal rotating shaft of North and South direction pitching movement, and vertical rotation axis, horizontal rotating shaft are located in transmission case, and column is logical Component level rotation connection flanged joint vertical rotation axis is crossed, horizontal rotating shaft is solid by component by component pitching movement connecting flange Determine part connection photovoltaic module；
The vertical rotation axis is connected with vertical axis worm decelerating machine, and vertical axis worm decelerating machine passes through vertical axis driving chain It is connected with horizontal movement driving motor, the controller connects horizontal movement driving motor by turning motor driver；
The horizontal rotating shaft is connected with trunnion axis worm decelerating machine, and trunnion axis worm decelerating machine passes through pitching movement transmission chain Item connects pitching movement driving motor, and the controller connects pitching movement driving motor by pitching motor driver.
Further, the component level rotation connection flange is equipped with thing rotary motion close to switch, transmission case bottom Portion is provided with corresponding thing rotary motion block.
Further, the horizontal rotating shaft is equipped with horizontal axis connection block, and transmission case corresponds to horizontal axis connection block and sets It is equipped with pitching movement limit switch.
Further, the pitching movement angular transducer is located on horizontal rotating shaft, horizontally rotates angular transducer and is located at On vertical rotation axis.
Further, the ambient light illumination tester includes the trigone taper type irradiation level biography for being 45 ° with bottom surface angle Sensor support, the ambient light illumination base of measuring equipment for fixing trigone taper type irradiance sensor support, the triangular pyramid Solar irradiance sensor, the connection control of solar irradiance sensor are respectively equipped on four faces of platform shape irradiance sensor support Device processed.
Further, the trigone taper type irradiance sensor support section parallel with bottom surface is defined as the face A and makees For benchmark face, it is contrasting surfaces that in addition 3 faces, which define B1, B2, B3, and solar irradiance sensor is separately positioned on the face A, B1, B2, B3 On, ambient light illumination base of measuring equipment uses double-axis tracking formula support system, guarantees that datum level A keeps track the sun rail when making Mark, the holding face A are sun light direct beam face.
Further, the double-axis tracking formula support system includes tester column, provides east-west direction rotary motion Tester vertical rotation axis provides the tester horizontal rotating shaft of North and South direction pitching movement, and tester vertical rotation axis, tester are horizontal Shaft is located in tester transmission case, and tester column connects vertical rotation axis, and horizontal rotating shaft is connected with irradiance sensor bracket, Trigone taper type irradiance sensor support is fixed on irradiance sensor bracket.
A kind of tracing type photovoltaic bracket control method, using above-mentioned tracing type photovoltaic bracket control system, the controlling party Method includes the following steps:
Step 1:
The ambient light illumination of real-time detection correspondence system time:
Every 15 minutes reading primary system time T of controller, and record moment ambient lighting before the moment and 15 minutes Spend the illuminance value I of the datum level A of testerATAnd IAT-15, record the face B1, B2, B3 T moment intensity of illumination IB1T、IB2T、IB3T；
Step 2:
Judge illumination intensity:
The I measured in judgment step 1ATIlluminance size is less than 200W/m2When, intensity of illumination is not enough to drive photovoltaic inverse Become device work, photovoltaic module, which is remain stationary, not to be rotated, enters step 7；Illuminance is greater than 200W/m2When, judge the time for the morning Or afternoon；
Step 3:
Judge system time:
(1) if T is morning time and IAT-IAT-15≥100W/m2, 4 are entered step, otherwise enters step 1；
(2) if T be the time in the afternoon and | IAT-IAT-15|≥100W/m2, 4 are entered step, otherwise enters step 1；
Step 4:
The adjustment of photovoltaic module horizontal angle:
Photovoltaic module current angle position is read by controller, is compared with the track of sun data of controller storage, Keep the azimuth of photovoltaic module consistent with track of sun data, carries out horizontal angle tracking；
Step 5:
Judge whether to need to adjust the pitch angle of photovoltaic module:
Judge the difference in the ambient light illumination tester face benchmark A and other 3 contrasting surfaces B1, B2, B3, both: (IAT-IB1T)、 (IAT-IB2T)、(IAT-IB3T), as long as any difference is more than 100W/m2, 6 are entered step, otherwise enters step 1；
Step 6:
Adjust the pitch angle of photovoltaic module:
Photovoltaic module current angle position is read by controller, is compared with the track of sun data of controller storage, Keep the pitch angle of photovoltaic module consistent with track of sun data, carry out pitching angle tracking, has adjusted and repeated step 1；
Step 7: between judging the time whether at 18 and when 24, if so, entering step 8, otherwise entering step 1；
Step 8: each zeroing data in controller, when system time is 24, photovoltaic module returns zero point.
The advantageous effects obtained using technical solution as above are as follows:
The invention proposes tracing type photovoltaic bracket control systems, on the basis of time control, using optically-controlled signal as tune Signal processed.When weather is fine, intensity of illumination difference received by the datum level and contrasting surfaces of ambient light illumination tester is enough Greatly, photovoltaic module works according to timed manner；When the external world is in continuous rainy weather, the light environment of ambient enviroment is by the sun Direct projection becomes scattering radiation.Scattering radiation is small more compared to directly radiating in the difference of the intensity of illumination of horizontal four direction, by This can be detected the light intensity of ambient enviroment and the difference of four direction light intensity by ambient light illumination tester, with the realization of this signal The control that photovoltaic bracket system tracks day.
Detailed description of the invention
Fig. 1 is double-axis tracking formula photovoltaic bracket system structure diagram.
Fig. 2 is double-axis tracking formula photovoltaic bracket system transmission case internal structure schematic diagram.
Fig. 3 is ambient light illumination tester structure diagram.
Fig. 4 is the side view of Fig. 3.
Fig. 5 is ambient light illumination base of measuring equipment structure diagram.
Fig. 6 is tracing type photovoltaic support system overall schematic.
Fig. 7 is controller working principle diagram.
Fig. 8 is tracing type photovoltaic support system work flow diagram.
In figure, 1- pedestal, 2- column, 3- transmission case, 4- vertical rotation axis, 5- horizontal rotating shaft, 6- photovoltaic module, 7- component bows Movement connecting flange is faced upward, 8- component level is rotatablely connected flange, and 9- horizontal movement driving motor, 10- motor chain conveyer is fixed to be stood Plate, 11- pitching movement driving chain, 12- pitching movement driving motor, 13- horizontal shaft support bearings, 14- component fixing piece, 15- vertical axis mounting flange, 16- trunnion axis worm decelerating machine, 17- pitching movement angular transducer, the horizontal axis connection gear of 18- Block, 19- pitching movement limit switch, 20- controller, 21- thing rotary motion block, the close switch of 22- thing rotary motion, 23- vertical shaft bearings, 24- horizontally rotate angular transducer, 25- vertical axis worm decelerating machine, 26- vertical axis driving chain, 27- Cable outlet mouth, 28- trigone taper type irradiance sensor support, 29- solar irradiance sensor, 30- ambient light illumination are surveyed Try instrument, 31- irradiance sensor bracket, 32- base of measuring equipment, 33- tester column, 34- tester transmission case.
Specific embodiment
It is described further in conjunction with Fig. 1 to 8 pairs of a specific embodiment of the invention:
Double-axis tracking formula photovoltaic bracket still continues working under the conditions of the present invention solves long-time rainy weather, increases machine The problem of tool is worn, and system stability is caused to reduce.Tracing type photovoltaic bracket control system and control method use tracking mode light Volt component is needing just to carry out rotation tracking, reduces energy loss.
The present invention is on the basis of photovoltaic bracket system uses time control, using optically-controlled signal as modulated signal.Specific works Mode are as follows: when weather is fine, intensity of illumination difference received by the datum level and contrasting surfaces of ambient light illumination tester is enough Greatly, photovoltaic module works according to timed manner；When the external world is in continuous rainy weather, the light environment of ambient enviroment is by the sun Direct projection becomes scattering radiation.Scattering radiation is small more compared to directly radiating in the difference of the intensity of illumination of horizontal four direction, by This can be detected the light intensity of ambient enviroment and the difference of four direction light intensity by ambient light illumination tester, with the realization of this signal The control that photovoltaic bracket system tracks day.
Tracing type photovoltaic bracket control system, including be used to support photovoltaic module double-axis tracking formula photovoltaic bracket system, Ambient lighting control system, the ambient lighting control system include ambient light illumination tester 30, controller 20, the twin shaft Tracing type photovoltaic support system includes transmission case 3, pitching movement angular transducer 17, horizontally rotates angular transducer 24；It is described Pitching movement angular transducer horizontally rotates angular transducer, ambient light illumination tester connection controller, and in real time by photovoltaic The pitch angle of component, level angle information pass to controller, and the output result control of combining environmental illuminance tester The transmission case of double-axis tracking formula photovoltaic bracket system is modulated control to the angle of photovoltaic module.
Controller built-in system time timer, while local longitude and latitude data are stored with, Various Seasonal and date are too The sunshine average intensity data etc. of positive drift angle data, Various Seasonal and date in different moments.
Double-axis tracking formula photovoltaic bracket system further includes column 2, the vertical rotation axis 4 for providing east-west direction rotary motion, mentions For the horizontal rotating shaft 5 of North and South direction pitching movement, vertical rotation axis, horizontal rotating shaft are located in transmission case, and column passes through component level It is rotatablely connected flange 8 and connects vertical rotation axis, horizontal rotating shaft is connected by component pitching movement connecting flange 7 by component fixing piece 14 Connect photovoltaic module 6；The vertical rotation axis is connected with vertical axis worm decelerating machine 25, and vertical axis worm decelerating machine is passed by vertical axis Dynamic chain 26 is connected with horizontal movement driving motor 9, and the controller connects horizontal movement driving by turning motor driver Motor；The horizontal rotating shaft is connected with trunnion axis worm decelerating machine 16, and trunnion axis worm decelerating machine passes through pitching movement transmission chain Item 11 connects pitching movement driving motor 12, and the controller connects pitching movement driving motor by pitching motor driver. Column is fixedly mounted by pedestal 1.
Vertical axis worm decelerating machine, trunnion axis worm decelerating machine reduction ratio 80, are driven with stepper motor, using 1:1 chain Transmission.Horizontal movement driving motor, pitching movement driving motor are stepper motor.
It is restricted by cable, transmission case body etc., rotary motion and pitching movement are all unable to complete integral cycle rotating, in order to prevent Collision, component level are rotatablely connected flange and are equipped with thing rotary motion close to switch 22, and it is right with it that transmission case bottom is provided with The thing rotary motion block 21 answered.Horizontal rotating shaft is equipped with horizontal axis connection block 18, and transmission case corresponds to horizontal axis connection gear Block is provided with pitching movement limit switch 19.
Pitching movement angular transducer is located on horizontal rotating shaft, horizontally rotates angular transducer and is located on vertical rotation axis.Water Flat turn axis is connect by horizontal shaft support bearings 13 with transmission case, and there are running clearances.Column is rotated by component level to be connected Acting flange connects vertical rotation axis, and junction installs vertical axis mounting flange 15 additional, and vertical rotation axis passes through vertical shaft bearings 23 and transmission Case, the rotation connection of vertical axis mounting flange, and there are running clearances.
Motor chain conveyer fixed board 10, horizontal movement driving motor, pitching movement driving motor, water are equipped in transmission case Flat axis worm decelerating machine, vertical axis worm decelerating machine are each attached on motor chain conveyer fixed board.
Transmission case is equipped with cable outlet mouth 27, is thus laid with power supply line and control line is that inspection is powered or uploaded to internal components Measured data assigns control command, as signal transmission passage.
Ambient light illumination tester include be 45 ° with bottom surface angle trigone taper type irradiance sensor support 28, use In the ambient light illumination base of measuring equipment of fixed trigone taper type irradiance sensor support, the trigone taper type irradiation level is passed Solar irradiance sensor 29 is respectively equipped on four faces of sensor support, solar irradiance sensor connects controller.
The trigone taper type irradiance sensor support section parallel with bottom surface, is defined as the face A and as datum level, in addition It is contrasting surfaces that 3 faces, which define B1, B2, B3, and solar irradiance sensor is separately positioned on the face A, B1, B2, B3, ambient light illumination Base of measuring equipment uses double-axis tracking formula support system, guarantees that datum level A keeps track track of sun when making, and keeping the face A is too Direct sunlight face.
Double-axis tracking formula support system include tester column 33, provide east-west direction rotary motion tester vertically turn Axis provides the tester horizontal rotating shaft of North and South direction pitching movement, and tester vertical rotation axis, tester horizontal rotating shaft are located at test In instrument transmission case 34, tester column connects vertical rotation axis, and horizontal rotating shaft is connected with irradiance sensor bracket 31, trigone frustum Shape irradiance sensor support 28 is fixed on irradiance sensor bracket 31.Tester column 33 is solid by base of measuring equipment 32 Dingan County's dress.
The double-axis tracking formula support system of ambient light illumination tester uses and pair of tracing type photovoltaic bracket control system Axis tracing type photovoltaic support system uses identical structure and working principle, can realize and synchronize to day tracking.
Tracing type photovoltaic bracket control method, using above-mentioned tracing type photovoltaic bracket control system, the control method packet Include following steps:
Step 1:
The ambient light illumination of real-time detection correspondence system time:
Every 15 minutes reading primary system time T of controller, and record moment ambient lighting before the moment and 15 minutes Spend the illuminance value I of the datum level A of testerATAnd IAT-15, record the face B1, B2, B3 T moment intensity of illumination IB1T、IB2T、IB3T；
Step 2:
Judge illumination intensity:
The I measured in judgment step 1ATIlluminance size is less than 200W/m2When, intensity of illumination is not enough to drive photovoltaic inverse Become device work, photovoltaic module, which is remain stationary, not to be rotated, enters step 7；Illuminance is greater than 200W/m2When, judge the time for the morning Or afternoon；
Step 3:
Judge system time:
(1) if T is morning time and IAT-IAT-15≥100W/m2, 4 are entered step, otherwise enters step 1；
(2) if T be the time in the afternoon and | IAT-IAT-15|≥100W/m2, 4 are entered step, otherwise enters step 1；
Step 4:
The adjustment of photovoltaic module horizontal angle:
Photovoltaic module current angle position is read by controller, is compared with the track of sun data of controller storage, Keep the azimuth of photovoltaic module consistent with track of sun data, carries out horizontal angle tracking；
Step 5:
Judge whether to need to adjust the pitch angle of photovoltaic module:
Judge the difference in the ambient light illumination tester face benchmark A and other 3 contrasting surfaces B1, B2, B3, both: (IAT-IB1T)、 (IAT-IB2T)、(IAT-IB3T), as long as any difference is more than 100W/m2, 6 are entered step, otherwise enters step 1；
Step 6:
Adjust the pitch angle of photovoltaic module:
Photovoltaic module current angle position is read by controller, is compared with the track of sun data of controller storage, Keep the pitch angle of photovoltaic module consistent with track of sun data, carry out pitching angle tracking, has adjusted and repeated step 1；
Step 7: between judging the time whether at 18 and when 24, if so, entering step 8, otherwise entering step 1；
Step 8: each zeroing data in controller, when system time is 24, photovoltaic module returns zero point.
For example, certain day cloudy day, intensity of illumination is less than 200W/m2, when the time is the morning 10, through double-axis tracking formula photovoltaic bracket System, ambient lighting control system use above method comprehensive descision, do not track day.
A certain moment, intensity of illumination are less than 200W/m2, the time be at night 20 when, through double-axis tracking formula photovoltaic bracket system, Ambient lighting control system uses above method comprehensive descision, does not track day, and each zeroing data in controller works as system time Photovoltaic module returns zero point when being 24.
At a certain moment, measure IATFor 250W/m2, IAT-15For 400W/m2, it is greater than 200W/m according to intensity2When, the time is afternoon When 15, | IAT-IAT-15|≥100W/m2, (IAT-IB3T)≥100W/m2, through double-axis tracking formula photovoltaic bracket system, ambient lighting control System processed uses above method comprehensive descision, adjusts the horizontal angle and pitch angle of photovoltaic module, tracks day.
Certainly, described above is only that presently preferred embodiments of the present invention is answered the present invention is not limited to enumerate above-described embodiment When explanation, anyone skilled in the art is all equivalent substitutes for being made, bright under the guidance of this specification Aobvious variant, all falls within the essential scope of this specification, ought to be by protection of the invention.

Claims (9)

1. a kind of tracing type photovoltaic bracket control system, which is characterized in that the double-axis tracking including being used to support photovoltaic module (6) Formula photovoltaic bracket system, ambient lighting control system, the ambient lighting control system include ambient light illumination tester (30), Controller (20), the double-axis tracking formula photovoltaic bracket system include transmission case (3), pitching movement angular transducer (17), water Flat rotation angle sensor (24)；
The pitching movement angular transducer (17) horizontally rotates angular transducer (24), ambient light illumination tester (30) even Controller (20) are connect, and the pitch angle of photovoltaic module (6), level angle information are passed into controller (20) in real time, and tie The transmission case (3) of the output result control double-axis tracking formula photovoltaic bracket system of cyclization border illuminance tester (30) is to photovoltaic group The angle of part (6) is modulated control.
2. a kind of tracing type photovoltaic bracket control system according to claim 1, which is characterized in that the double-axis tracking formula Photovoltaic bracket system further includes column (2), the vertical rotation axis (4) for providing east-west direction rotary motion, provides North and South direction pitching The horizontal rotating shaft (5) of movement, vertical rotation axis (4), horizontal rotating shaft (5) are located in transmission case (3), and column (2) passes through component level It is rotatablely connected flange (8) connection vertical rotation axis (4), horizontal rotating shaft (5) passes through component by component pitching movement connecting flange (7) Fixing piece (14) connects photovoltaic module (6)；
The vertical rotation axis (4) is connected with vertical axis worm decelerating machine (25), and vertical axis worm decelerating machine (25) passes through vertical axis Driving chain (26) is connected with horizontal movement driving motor (9), and the controller (20) connects water by turning motor driver Flat movement driving motor (9)；
The horizontal rotating shaft (5) is connected with trunnion axis worm decelerating machine (16), and trunnion axis worm decelerating machine (16) is transported by pitching Dynamic driving chain (11) connection pitching movement driving motor (12), the controller (20) are bowed by the connection of pitching motor driver Face upward movement driving motor (12).
3. a kind of tracing type photovoltaic bracket control system according to claim 2, which is characterized in that the component level turns Dynamic connecting flange (8) are equipped with thing rotary motion close to switch (22), and transmission case (3) bottom is provided with corresponding thing Rotary motion block (21).
4. a kind of tracing type photovoltaic bracket control system according to claim 2, which is characterized in that the horizontal rotating shaft (5) it is equipped with horizontal axis connection block (18), the corresponding horizontal axis connection block (18) of transmission case (3) is provided with pitching movement limit It switchs (19).
5. a kind of tracing type photovoltaic bracket control system according to claim 2, which is characterized in that the pitching movement angle Degree sensor (17) is located on horizontal rotating shaft (5), horizontally rotates angular transducer (24) and is located on vertical rotation axis (4).
6. a kind of tracing type photovoltaic bracket control system according to claim 1, which is characterized in that the ambient light illumination Tester (30) include be 45 ° with bottom surface angle trigone taper type irradiance sensor support (28), for fixing triangular pyramid The ambient light illumination base of measuring equipment of platform shape irradiance sensor support (28), the trigone taper type irradiance sensor support (28) it is respectively equipped with solar irradiance sensor (29) on four faces, solar irradiance sensor (29) connects controller (20)。
7. a kind of tracing type photovoltaic bracket control system according to claim 6, which is characterized in that the trigone taper type Irradiance sensor support (28) section parallel with bottom surface, is defined as the face A and as datum level, in addition 3 faces be defined as B1, B2, B3 are contrasting surfaces, and solar irradiance sensor (29) is separately positioned on the face A, B1, B2, B3, ambient light illumination tester bottom Seat uses double-axis tracking formula support system, guarantees that datum level A keeps track track of sun when making, the holding face A is sun light direct beam Face.
8. a kind of tracing type photovoltaic bracket control system according to claim 7, which is characterized in that the double-axis tracking formula Support system includes tester column (33), the tester vertical rotation axis for providing east-west direction rotary motion, provides North and South direction The tester horizontal rotating shaft of pitching movement, tester vertical rotation axis, tester horizontal rotating shaft are located in tester transmission case (34), Tester column (33) connects vertical rotation axis, and tester horizontal rotating shaft is connected with irradiance sensor bracket (31), trigone frustum Shape irradiance sensor support (28) is fixed on irradiance sensor bracket (31).
9. a kind of tracing type photovoltaic bracket control method, using the described in any item tracing type photovoltaic branch of the claims 1-8 Frame control system, which is characterized in that the control method includes the following steps:
Step 1:
The ambient light illumination of real-time detection correspondence system time:
Every 15 minutes reading primary system time T of controller, and record moment ambient light illumination survey before the moment and 15 minutes Try the illuminance value I of the datum level A of instrumentATAnd IAT-15, record the face B1, B2, B3 T moment intensity of illumination IB1T、IB2T、IB3T；
Step 2:
Judge illumination intensity:
The I measured in judgment step 1ATIlluminance size is less than 200W/m2When, intensity of illumination is not enough to drive photovoltaic DC-to-AC converter Work, photovoltaic module, which is remain stationary, not to be rotated, enters step 7；Illuminance is greater than 200W/m2When, judge the time for the morning still Afternoon；
Step 3:
Judge system time:
(1) if T is morning time and IAT-IAT-15≥100W/m2, 4 are entered step, otherwise enters step 1；
(2) if T be the time in the afternoon and | IAT-IAT-15|≥100W/m2, 4 are entered step, otherwise enters step 1；
Step 4:
The adjustment of photovoltaic module horizontal angle:
Photovoltaic module current angle position is read by controller, is compared with the track of sun data of controller storage, makes light The azimuth for lying prostrate component is consistent with track of sun data, carries out horizontal angle tracking；
Step 5:
Judge whether to need to adjust the pitch angle of photovoltaic module:
Judge the difference in the ambient light illumination tester face benchmark A and other 3 contrasting surfaces B1, B2, B3, both: (IAT-IB1T)、(IAT- IB2T)、(IAT-IB3T), as long as any difference is more than 100W/m2, 6 are entered step, otherwise enters step 1；
Step 6:
Adjust the pitch angle of photovoltaic module:
Photovoltaic module current angle position is read by controller, is compared with the track of sun data of controller storage, makes light The pitch angle for lying prostrate component is consistent with track of sun data, carries out pitching angle tracking, has adjusted and has repeated step 1；
Step 7: between judging the time whether at 18 and when 24, if so, entering step 8, otherwise entering step 1；
Step 8: each zeroing data in controller, when system time is 24, photovoltaic module returns zero point.
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