CN106843288A - Photovoltaic tracking support regards daily motion control system and method - Google Patents
Photovoltaic tracking support regards daily motion control system and method Download PDFInfo
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
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- G05D3/12—Control of position or direction using feedback
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Abstract
Daily motion control system is regarded the invention discloses a kind of photovoltaic tracking support, it is characterised in that：Described photovoltaic tracking support includes support post, photovoltaic module support frame, angle of pitch rotary drive mechanism, azimuth rotary drive mechanism；Described angle of pitch rotary drive mechanism and azimuth rotary drive mechanism are connected by respective power line and holding wire with depending on daily motion control system respectively；Described includes position of sun detection sensor, support attitude detecting sensor, photovoltaic module generation current sensor, position of sun calculator, central controller, motor driver, support tracking attitude data storehouse and self study inference machine regarding daily motion control system.In addition, regarding daily motion control method present invention also offers a kind of photovoltaic tracking support.
Description
The technical field is as follows:
the invention relates to an automatic control system and method for a photovoltaic tracking support, in particular to a system and method capable of automatically controlling sun-looking movement.
Background art:
compared with a fixed support, the photovoltaic tracking support can improve the generated energy of a photovoltaic module by more than 15%. At present, the sun-viewing movement control method for the photovoltaic tracking support mainly comprises the following three methods: (1) a light-operated tracking mode; (2) a time-controlled tracking mode; (3) and a closed loop feedback and time control tracking multiplexing mode for detecting the posture of the support. The light-operated tracking mode is characterized in that (1) the photovoltaic tracking support is controlled to track the operation of the sun by detecting the movement direction of the sun. The method has high sensitivity and simpler structural design, but when the direct sunlight is insufficient, the detection fails and a correct tracking instruction cannot be sent out easily. (2) The time control tracking mode is to control the movement of the tracking bracket by calculating the movement track of the sun. This method is not affected by weather and stray light, but because of the open-loop control method, manufacturing and installation errors of the bracket cannot be corrected. (3) A support attitude detection closed-loop feedback and time control tracking multiplexing mode is characterized in that an attitude detection sensor of a support is used as a closed-loop feedback signal to correct errors of a time control algorithm, and the dependence of a light control mode on direct sunlight is solved. The above method has the following problems: (1) because the reliable operation of the system depends on the service life and the precision of the sun detection light sensor or the bracket attitude detection sensor, when the sensor fails, the system cannot operate effectively; (2) since the flatness of the photovoltaic modules mounted on the support varies greatly, when the sun detection sensor or the support posture detection sensor itself is aligned with the sun, it is not necessary that all the photovoltaic modules on the support are aligned with the sun, and accordingly, the amount of electricity generated by the photovoltaic modules is not necessarily the largest.
The invention content is as follows:
the invention aims to provide a photovoltaic tracking support sun-looking motion control system aiming at the defects of the prior art, and the system adopts a method of multiplexing four modes of time control tracking, light control tracking, support posture detection closed loop feedback tracking and historical data tracking to realize the effects of all-weather work, strong overall power generation capacity and high system operation reliability.
In order to achieve the purpose, the technical scheme of the invention is as follows:
a sun-looking motion control system of a photovoltaic tracking support comprises a supporting stand column, a photovoltaic module supporting frame, a pitch angle rotation driving mechanism and an azimuth angle rotation driving mechanism. The pitch angle rotation driving mechanism and the azimuth angle rotation driving mechanism are respectively connected with the sun-looking motion control system through respective power lines and signal lines. The sun-viewing movement control system is characterized by comprising a sun position detection sensor, a support posture detection sensor, a photovoltaic module power generation current sensor, a sun position calculator, a central controller, a motor driver, a support tracking posture database and a self-learning inference machine. Wherein,
the sun position detection sensor is fixed on the photovoltaic module support frame and moves along with the photovoltaic module. The sun position signal detected by the sun position sensor is sent to the central controller.
The support attitude detection sensor detects support attitude angle values of the photovoltaic tracking support in the azimuth angle direction and the pitch angle direction. The support posture detection sensor is fixed on the photovoltaic module support frame and moves along with the photovoltaic module. The rack attitude signal detected by the rack attitude detection sensor is sent to the central controller.
The photovoltaic module power generation current sensor is positioned in a power generation circuit of the photovoltaic module and used for detecting photovoltaic power generation current. The detected photovoltaic module power generation current signal is sent to the central controller.
The solar position calculator calculates theoretical data of the solar position, namely an azimuth angle and an altitude angle, according to the longitude and latitude, the altitude and the current clock of the photovoltaic tracking support, and sends the calculation result to the central controller.
The central controller analyzes and calculates according to the data of the theoretical position of the sun, the data of the detection sensor of the position of the sun, the attitude data of the bracket and the power generation current data of the photovoltaic module, and finally sends action instructions to the pitch angle rotation driving mechanism and the azimuth angle rotation driving mechanism to finish the action of looking at the day.
The support tracking attitude self-learning inference machine records the analysis and calculation process of the central controller, and optimizes the calculation method according to the corresponding current peak value to form a self-learning knowledge point.
The support tracking attitude self-learning database stores knowledge points generated by a self-learning inference machine, corresponding photovoltaic tracking support attitude data, a timestamp and photovoltaic module generating current data in the database to form historical data.
As a general technical concept, the invention also provides a photovoltaic tracking support sun-viewing movement control method, which specifically comprises the following steps:
(1) determining whether to track according to the current time: if the current time is after the sunrise time of the current day and before the sunset time, starting a apparent day movement control program; otherwise, the start is not performed. Sunrise and sunset times are obtained by a sun position calculator, and belong to the mature prior art.
(2) And the central controller commands the pitch angle rotation driving mechanism and the azimuth angle rotation driving mechanism to start to move through the sun-looking motion control program, so that the photovoltaic tracking support rotates to the initial position. The starting position is the position where the sun ray is vertically incident at the start of tracking.
(3) And judging weather conditions and selecting a tracking mode. After the tracking support is rotated to the initial position, the central controller collects the output signal of the sun position detection sensor once every set time. If the signal intensity is larger than a preset value, adopting a light-operated tracking mode; and if the signal intensity is smaller than a preset value, adopting a non-light-controlled tracking mode.
(4) And in a non-light-operated tracking mode, self-checking is carried out on the bracket attitude detection sensor. If the feedback data of the sensor is normal, entering a posture detection closed loop feedback tracking mode; otherwise, entering a timed mode.
(5) And detecting the generated current of the photovoltaic assembly in a light control mode, a posture detection closed-loop feedback tracking mode and a time control mode, associating the current detection value with the posture and the timestamp of the support, and starting a self-learning mode.
(6) The maximum current generated along with long-time running and the associated support posture data are accumulated continuously, data mining is carried out through a support tracking posture self-learning inference machine, an optimal tracking array is found out, and the optimal tracking array is stored in a knowledge base. With the continuous improvement of the knowledge base, when the data of the optimal tracking array covers the annual operation period, a historical data tracking mode is started.
The invention has the beneficial effects that: an all-weather tracking mode is provided according to different weather conditions, the multiplexing of different tracking modes takes the maximum generated energy as a final target, and the reliability of the system is effectively improved by performing a membership data tracking mode through historical data accumulated by a self-learning method.
Description of the drawings:
the invention is further described below in conjunction with the appended drawings and the detailed description.
FIG. 1 is a schematic diagram of the main components of the present invention.
Wherein: 1-supporting a column; 2-a photovoltaic module support frame; 3-pitch angle rotation drive mechanism; 4-an azimuthal rotation drive mechanism; 5-a sun-looking movement control system; 5.1-sun position detection sensor; 5.2-bracket attitude detection sensor; 5.3-photovoltaic module generating current sensor; 5.4-central controller; 5.5-sun position calculator; 5.6-azimuthal motor drive; 5.7-altitude motor drive; 5.8-a support tracking attitude database; 5.9-self-learning inference engine.
Fig. 2 is a flowchart of a photovoltaic tracking support apparent day movement control method.
The specific implementation mode is as follows:
in order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.
As shown in fig. 1, the photovoltaic tracking support sun-viewing movement control system of the present embodiment includes:
the supporting upright post 1 is used as the support of the whole bracket and fixed on the ground, the upper part of the supporting upright post is connected with the azimuth angle rotation driving mechanism 4, and the azimuth angle rotation driving mechanism 4 is allowed to horizontally rotate; the pitch angle rotation driving mechanism 3 is fixed on the azimuth angle rotation driving mechanism 4, and the pitch angle rotation driving mechanism 3 is allowed to perform pitch motion; the pitch angle rotation driving mechanism 3 is connected with the photovoltaic module support frame 2 through a rotary hinge and drives the photovoltaic module support frame 2 and the photovoltaic power generation module above the photovoltaic module support frame to realize pitch motion; a sun position detection sensor 5.1 is fixed on the sunny side of the photovoltaic module support frame 2, and a detected sun position signal is input into a central controller 5.4 of the sun-looking movement control system 5; the bracket attitude detection sensor 5.2 is fixed on the shade surface of the photovoltaic assembly support frame 2, and the detected bracket attitude signal is input into a central controller 5.4 of the sun-looking movement control system 5.
The sun-viewing movement control system 5 comprises a photovoltaic module generating current sensor 5.3, a sun position calculator 5.5, an azimuth motor driver 5.6, an altitude motor driver 5.7, a support tracking attitude database 5.8 and a self-learning inference machine 5.9 besides a sun position detection sensor 5.1 and a support attitude detection sensor 5.2, and is connected with a central controller 5.4.
As shown in fig. 2, the operation method of the photovoltaic tracking support apparent day movement control system includes the following steps:
(1) determining whether to track according to the current time: if the current time is after the sunrise time of the current day and before the sunset time, starting a apparent day movement control program; otherwise, the start is not performed. The sunrise and sunset times are obtained by the sun position calculator 5.5 and belong to the mature prior art.
(2) The central controller 5.4 commands the pitch angle rotation driving mechanism 3 and the azimuth angle rotation driving mechanism 4 to start to move through a sun-looking movement control program, so that the photovoltaic tracking support 2 rotates to a target position. The target position is the position where the sun ray is vertically incident at the tracking start time.
(3) And judging weather conditions and selecting a tracking mode. After the tracking support 2 is rotated to the target position, the central controller 5.4 collects the output signal of the sun position detection sensor 5.1 once every set time. If the signal intensity is larger than a preset value, adopting a light-operated tracking mode; and if the signal intensity is smaller than a preset value, adopting a non-light-controlled tracking mode.
(4) And in a non-light-operated tracking mode, self-checking is carried out on the bracket attitude detection sensor 5.2. If the feedback data of the sensor is normal, entering a posture detection closed loop feedback tracking mode; otherwise, entering a timed mode.
(5) Under the light control mode, the attitude detection closed loop feedback tracking mode and the time control mode, the photovoltaic module generating current sensor 5.3 detects the generating current of the photovoltaic module, associates the current detection value with the attitude and the timestamp of the support and starts the self-learning mode.
(6) The maximum current generated along with long-time running and the associated support posture data are accumulated continuously, data mining is carried out through a support tracking posture self-learning inference machine 5.9, an optimal tracking array is found out and stored in a knowledge base 5.10. With the continuous improvement of the knowledge base, when the data of the optimal tracking array covers the annual operation period, a historical data tracking mode is started.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (2)
1. The utility model provides a photovoltaic tracking support sun-looking motion control system which characterized in that: the photovoltaic tracking support comprises a support upright post, a photovoltaic module support frame, a pitch angle rotation driving mechanism and an azimuth angle rotation driving mechanism; the pitch angle rotation driving mechanism and the azimuth angle rotation driving mechanism are respectively connected with the sun-looking motion control system through respective power lines and signal lines; the sun-viewing movement control system comprises a sun position detection sensor, a support attitude detection sensor, a photovoltaic module power generation current sensor, a sun position calculator, a central controller, a motor driver, a support tracking attitude database and a self-learning inference machine.
2. A photovoltaic tracking support sun-looking movement control method is characterized by comprising the following steps: the method comprises the following steps of (1) determining whether to track according to the current time: if the current time is after the sunrise time of the current day and before the sunset time, starting a apparent day movement control program; otherwise, not starting; (2) the central controller commands the pitch angle rotation driving mechanism and the azimuth angle rotation driving mechanism to start moving through a sun-looking movement control program, so that the photovoltaic tracking support rotates to an initial position; (3) judging weather conditions and selecting a tracking mode; after the tracking bracket is rotated to the initial position, the central controller collects the output signal of the sun position detection sensor once every set time; if the signal intensity is larger than a preset value, adopting a light-operated tracking mode; if the signal intensity is smaller than a preset value, adopting a non-light-controlled tracking mode; (4) in a non-light-operated tracking mode, self-checking is carried out on the bracket attitude detection sensor; if the feedback data of the sensor is normal, entering a posture detection closed loop feedback tracking mode; otherwise, entering a time control mode; (5) detecting the generated current of the photovoltaic assembly in a light control mode, a posture detection closed loop feedback tracking mode and a time control mode, associating the current detection value with the posture and the timestamp of the support, and starting a self-learning mode; (6) the maximum current generated along with long-time running and the associated support posture data are accumulated continuously, data mining is carried out through a support tracking posture self-learning inference machine, an optimal tracking array is found out and stored in a knowledge base; with the continuous improvement of the knowledge base, when the data of the optimal tracking array covers the annual operation period, a historical data tracking mode is started.
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| CN113867421A (en) * | 2021-11-19 | 2021-12-31 | 晟维新能源科技发展(天津)有限公司 | Intelligent tracking control system applied to photovoltaic tracking support |
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Address after: 213000 No. 88 Lao Ming Road, Hing town, Changzhou, Jiangsu, Liyang Applicant after: Jiangsu Guodian new energy equipment Co., Ltd. Address before: 213000 No. 88 Lao Ming Road, Hing town, Changzhou, Jiangsu, Liyang Applicant before: Jiangsu Guodian iron tower Co., Ltd. |
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Application publication date: 20170613 |