CN115528989A - Resonance adjusting method and device for photovoltaic panel - Google Patents
Resonance adjusting method and device for photovoltaic panel Download PDFInfo
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Abstract
The invention is applied to the technical field of photovoltaic energy storage, and discloses a resonance adjusting method for a photovoltaic panel, which comprises the steps of obtaining a first windward angle, a first wind power level and a first wind direction of the photovoltaic panel; obtaining a first vibration frequency of the photovoltaic panel according to the first windward angle, the first wind power level and the first wind direction; acquiring the windward angle, the second wind power level and the second wind direction of a second photovoltaic panel; obtaining a second vibration frequency of the photovoltaic panel according to the second windward angle, the second wind power level and the second wind direction; when the first vibration frequency and the second vibration frequency form resonance, the first vibration frequency is changed. A photovoltaic panel resonance adjusting device is also disclosed. The invention is simple and practical, and can avoid the distortion and instability of the photovoltaic bracket caused by resonance on one hand; on the other hand, unnecessary power consumption can be reduced in measures for avoiding resonance.
Description
Technical Field
The invention relates to the technical field of photovoltaic energy storage, in particular to a resonance adjusting method and device for a photovoltaic panel.
Background
Photovoltaic power generation is a technology of directly converting light energy into electric energy by using the photovoltaic effect of a semiconductor interface. The photovoltaic inverter mainly comprises a photovoltaic panel, a controller and an inverter, and the main components comprise electronic components. The solar cells are packaged and protected after being connected in series to form a large-area solar cell module, and then the photovoltaic power generation device is formed by matching with components such as a power controller and the like.
In the application process of the photovoltaic panel, a large number of photovoltaic panels are paved on a large panel, so that the large area is easily occupied, and the waste of land resources can be caused by the occupation of a large amount of land. Due to different longitudes and latitudes, the sunrise time and the sunset time of the sun also have difference, and the sunlight intensity of the photovoltaic panel has larger change; in addition, the topography is different, and especially there is some hilly areas, and the topography has the pothole, and the height is different, if same height of photovoltaic panel installation and gradient, photovoltaic panel can shelter from each other, leads to the generating efficiency low. After the photovoltaic panel support is built, the wind speed around the power station can enable the photovoltaic panel support to generate vibration frequency, the frequency generated by the supports due to different windward angles and different received wind power and wind directions can be different, and the vibration frequency generated by two supports is assumed to be f1 and f2. When f2 is close to or equal to f1, the two photovoltaic panel brackets can resonate, and at the moment, the brackets can be distorted and unstable, so that the safety of the photovoltaic panel brackets is endangered.
Disclosure of Invention
Based on the situation, the invention provides a resonance adjusting method for the photovoltaic panel, the scheme of the accurate azimuth sensor for the photovoltaic panel is adopted, the wind power and the wind direction of the current wind are measured in a matching mode, the corresponding vibration frequency of the photovoltaic panel is obtained, and when the resonance between the photovoltaic panels is formed, the vibration frequency is changed to eliminate the resonance.
The invention discloses a resonance adjusting method for a photovoltaic panel, which comprises the steps of obtaining a first windward angle, a first wind power level and a first wind direction of a first photovoltaic panel; obtaining a first vibration frequency of the first photovoltaic panel according to the first windward angle, the first wind power level and the first wind direction; acquiring the windward angle, the second wind power level and the second wind direction of a second photovoltaic panel; obtaining a second vibration frequency of the second photovoltaic panel according to the second windward angle, the second wind power level and the second wind direction; when the first vibration frequency and the second vibration frequency form resonance, the first vibration frequency is changed. Changing the first vibration frequency is changing with a driver and/or changing the first vibration frequency by changing the first angle of attack.
The invention also discloses a resonance adjusting device of the photovoltaic panel, which comprises a windward angle acquiring module, a wind power information acquiring module and a vibration frequency adjusting module; each module is in signal connection; the windward angle acquisition module is used for acquiring a first windward angle of the first photovoltaic panel and a second windward angle of the second photovoltaic panel; the wind power information acquisition module is used for acquiring a first wind power level and a first wind direction when the first photovoltaic panel faces the wind, and a second wind power level and a second wind direction when the second photovoltaic panel faces the wind; the vibration frequency adjusting module is used for obtaining a second vibration frequency of the photovoltaic panel according to a second windward angle, a second wind power level and a second wind direction; and judging whether the first vibration frequency and the second vibration frequency form resonance or not, and if so, changing the first vibration frequency.
The invention also discloses a resonance adjusting method of the photovoltaic panel, which comprises the steps of obtaining the three-dimensional coordinates of the photovoltaic panel, the width of the photovoltaic panel and the relative position between two adjacent rows of photovoltaic panels; obtaining angles of each photovoltaic panel; calculating the effective width of each photovoltaic panel which is not shielded according to the three-dimensional coordinates, the width and the relative position of the photovoltaic panel and the angle of the photovoltaic panel; calculating and obtaining the total generated power of the photovoltaic panels according to the effective width of each photovoltaic panel; acquiring the angle combination of the photovoltaic panel when the total power generation power is maximum, and adjusting the photovoltaic panel according to the angle combination; when the photovoltaic panels with the same vibration frequency are detected, the vibration frequency of the photovoltaic panels with the same vibration frequency is changed until resonance is eliminated.
The step of obtaining the photovoltaic panel angle at which the total generated power is maximum comprises: the solar altitude is theta, the width of the photovoltaic panel is D, and the three-dimensional coordinate of the photovoltaic panel is obtained as (X) i ,Y i ,Z i ) Obtaining the angle alpha of each row of photovoltaic panels i Obtaining the solar incident angle beta of each row of photovoltaic panels i Wherein beta is i ＝α i + theta, and the generated power eta corresponding to the unit length can be obtained according to the performance of the photovoltaic panel i ；
Calculating to obtain the vertical/horizontal distance between two adjacent rows of photovoltaic panel fixed points:
L i，i+1 ＝f(X i ，Y i ，Z i ，X i+1 ，Y i+1 ，Z i+1 )，H i，i+1 ＝g(X i ，Y i， Z i ，X i+1 ，Y i+1 ，Z i+1 )
calculating the invalid width of the shielded part of the ith row of photovoltaic panels by the ith-1 row:
obtaining total generated power P:
The invention also discloses a photovoltaic panel resonance adjusting device, which comprises a positioning data acquisition module, a photovoltaic panel information module, a power generation power calculation module, an angle adjusting module and a vibration frequency adjusting module; each module is in signal connection; the positioning data acquisition module is used for acquiring the three-dimensional coordinates of each photovoltaic panel, the width of each photovoltaic panel and the relative position between two adjacent rows of photovoltaic panels; the photovoltaic panel information module is used for acquiring the solar incident angle of each photovoltaic panel; the generating power calculating module is used for calculating the effective width of each photovoltaic panel which is not shielded according to the three-dimensional coordinate, the width and the relative position of the photovoltaic panel and the solar incident angle; calculating the total generated power of the photovoltaic panels according to the effective width of each photovoltaic panel; the angle adjusting module is used for adjusting the photovoltaic panels according to the angles of the photovoltaic panels when the total power generation power is maximum; the vibration frequency adjusting module is used for detecting whether the photovoltaic panels with the same vibration frequency exist or not; if so, changing the vibration frequency of the photovoltaic panel with the same vibration frequency until the resonance is eliminated.
Changing the vibration frequency of the photovoltaic panel with the same vibration frequency by using a driver or changing the angle of the photovoltaic panel; changing the driver to perform energy consumption calculation, and then calculating the power generation amount reduced by the total power generation power by changing the angle of the photovoltaic panel; and comparing the energy consumption of the driver with the reduced power generation amount, and executing a frequency change scheme with the least energy consumption.
Some technical effects of this disclosure are: on one hand, the conditions of distortion and instability of the photovoltaic bracket caused by resonance can be intelligently avoided; by adopting the accurate position sensor of the photovoltaic panel and according to the difference of the installation height of the photovoltaic panel, the time for automatically adjusting the orientation of the photovoltaic panel can be effectively reduced through system traversal calculation, the mutual shielding among the photovoltaic panels is reduced, the power generation power of the photovoltaic panel in unit time is improved, and unnecessary energy consumption is reduced in measures for avoiding resonance.
Drawings
For a better understanding of the technical aspects of the present disclosure, reference may be made to the following drawings, which are included to provide an additional description of the prior art or embodiments. These drawings selectively illustrate articles or methods related to the prior art or some embodiments of the present disclosure. The basic information for these figures is as follows:
fig. 1 is a schematic flow chart of embodiment 1 of a resonance adjusting method for a photovoltaic panel according to the present invention.
Fig. 2 is a schematic flow chart of an embodiment 1 of the photovoltaic panel angle adjusting apparatus according to the present invention.
Fig. 3 is a schematic flow chart of embodiment 2 of the resonance adjusting method for a photovoltaic panel according to the present invention.
Fig. 4 is a diagram of an actual installation of a photovoltaic panel according to embodiment 2 of the resonance adjusting method for a photovoltaic panel of the present invention.
Fig. 5 is a schematic flow chart of embodiment 2 of the resonance adjusting apparatus for a photovoltaic panel according to the present invention.
Detailed Description
The technical means or technical effects related to the present disclosure will be further described below, and it is apparent that the examples provided are only some embodiments of the present disclosure, and not all embodiments. All other embodiments, which can be made by those skilled in the art without any inventive step, will be within the scope of the present disclosure, either explicitly or implicitly based on the embodiments and the text of the present disclosure.
As shown in fig. 1, the method in this embodiment includes the steps of:
s101: acquiring a first windward angle, a first wind power level and a first wind direction of a first photovoltaic panel; obtaining a first vibration frequency of the first photovoltaic panel according to the first windward angle, the first wind power level and the first wind direction; acquiring the windward angle, the second wind power level and the second wind direction of a second photovoltaic panel; obtaining a second vibration frequency of the second photovoltaic panel according to the second windward angle, the second wind power level and the second wind direction;
the installation scene of photovoltaic panel electricity generation has the spacious ground installation of grassland, the roof installation of high building mansion, and hilly land installation. In order to increase the power generation capacity as much as possible, the installation density is as dense as possible, and the photovoltaic panels are inevitably subjected to a certain vibration frequency along with the continuous blowing of the ambient wind to the photovoltaic panels. In a certain area range, the wind power level and the wind direction of wind received by the photovoltaic panel are consistent, and the vibration frequency of the photovoltaic panel can be obtained only by testing the wind power and the wind direction of the area and combining the windward angle of the current photovoltaic panel. Through multiple tests and experiments, the data of the vibration frequency of the photovoltaic panel can be recorded by the windward angle, the wind power grade and the wind direction of the photovoltaic panel, and the corresponding vibration frequency value can be accurately obtained through the three factors of the windward angle, the wind power grade and the wind direction of the photovoltaic panel. Therefore, the situation that an IMU inertial navigation sensor is additionally arranged on each photovoltaic panel to detect the vibration frequency of the photovoltaic panel at any time can be avoided, and the hardware cost is reduced.
S102: when the first vibration frequency and the second vibration frequency form resonance, the first vibration frequency is changed.
Continuously obtaining a first vibration frequency of the first photovoltaic panel and a second vibration frequency of the second photovoltaic panel, and judging whether the first vibration frequency and the second vibration frequency form resonance; if yes, the first vibration frequency is changed. The first vibration frequency is changed by means of the drive and/or by changing the first angle of attack. Purely by means of a driver, the need to continuously drive the motor increases its frequency, which continuously consumes electrical energy and is not suitable for large-scale use. And the mode of changing the first windward angle can be changed once only by changing the electrode driving without continuous adjustment and change, so that the electric energy can be saved to a greater extent. The two methods can be combined, so that the mode can be used in a transition period when the wind angle is changed while the vibration frequency is changed, and the mode is generally used under the condition of emergency.
As shown in fig. 2, the present embodiment further includes a photovoltaic panel resonance adjusting apparatus, in which: the system comprises a windward angle acquisition module, a wind power information acquisition module and a vibration frequency adjustment module; each module is in signal connection; the windward angle acquisition module is used for acquiring a first windward angle of the first photovoltaic panel and a second windward angle of the second photovoltaic panel; the wind power information acquisition module is used for acquiring a first wind power level and a first wind direction when the first photovoltaic panel faces the wind, and a second wind power level and a second wind direction when the second photovoltaic panel faces the wind; the vibration frequency adjusting module is used for obtaining a second vibration frequency of the photovoltaic panel according to the second windward angle, the second wind power level and the second wind direction; and judging whether the first vibration frequency and the second vibration frequency form resonance or not, and if so, changing the first vibration frequency.
As shown in fig. 3, the method in another embodiment of the present invention includes the steps of:
s201: acquiring the three-dimensional coordinates of each photovoltaic panel, the width of each photovoltaic panel and the relative position between two adjacent rows of photovoltaic panels; and acquiring the solar incident angle of each photovoltaic panel.
The installation scene of photovoltaic panel electricity generation has the open ground installation of grassland, and the roof of high building mansion is installed, and hilly land installation. In order to increase the power generation capacity as much as possible, the mounting density is as dense as possible, which inevitably results in shadowing. In order to improve the power generation efficiency of the photovoltaic panel with the same installation area, the intelligent angle adjusting system can be installed on the photovoltaic panel to improve the power generation efficiency. The intelligent angle adjusting system comprises an azimuth sensor and a Beidou high-precision positioning module and is responsible for acquiring the angle, the vibration amplitude and the accurate three-dimensional position information of the photovoltaic panel bracket; the DC motor and the controller receive instructions to adjust the angle of the photovoltaic panel bracket so as to adjust the orientation of the photovoltaic panel; the local controller is responsible for receiving data of the azimuth sensor within a certain range, transmitting the data to the cloud platform, receiving an instruction of the cloud platform and distributing the instruction to the DC motor control unit; the cloud platform is used for calculating the optimal orientation scheme of each solar cell panel through data modeling based on data acquired by each sensor and position information of the sun, and sending an instruction to inform the DC motor to adjust the posture of the photovoltaic panel bracket; the high-precision positioning module can acquire high-precision position information of a photovoltaic panel support (a photovoltaic panel) in real time through a Beidou satellite navigation system and a Beidou foundation reinforcing system, and accurately calculates the installation position and height information of the photovoltaic panel. Meanwhile, the IMU inertial navigation sensor is additionally arranged to detect the inclination angle of the photovoltaic panel and the vibration amplitude and vibration frequency of the photovoltaic panel in the X, V and Z directions.
As shown in fig. 4, because the rows of photovoltaic panels are mounted in a compact parallel arrangement, the use of a cross-sectional cut through one of the photovoltaic panels in each row results in a substantially relative position of the photovoltaic panels in each row. Extracting a reference point of each row of photovoltaic panels (which can be a support point of the photovoltaic panels or a better identification point on the photovoltaic panels.) and extracting three reference points A, B, C of three rows of the current solar altitude angle theta, and defining the three-dimensional coordinates (high-precision positioning coordinates) of the three reference points as (X) 1 ,Y 1 ,Z 1 )、(X 2 ,Y 2 ,Z 2 )、(X 3 ,Y 3 ,Z 3 ) (ii) a Same-principle drawerTaking i reference points of the i rows and defining the three-dimensional coordinates of the i reference points as (X) i ,Y i ,Z i ). Therefore, the vertical/horizontal distance between the reference points of the two adjacent rows of photovoltaic panels can be calculated through coordinate conversion. Obtaining the angle alpha of each row of photovoltaic panels simultaneously i Solar incident angle beta of each row of photovoltaic panels i Obtaining the photoelectric conversion efficiency of the corresponding photovoltaic panel as eta and the width D of the photovoltaic panel by looking up a table; the invalid width D of the width of the uncovered part of the photovoltaic panel can be calculated and obtained according to the width D of the photovoltaic panel, the solar altitude angle theta and the coordinate relation of the reference points of the two adjacent rows of photovoltaic panels Invalidation 。
S202: calculating the effective width of each photovoltaic panel which is not shielded according to the three-dimensional coordinates, the width of the photovoltaic panel, the relative position and the solar incident angle.
With the parameters of step S201, it is possible to calculate the power generation power with respect to the incident angle:
β i ＝α i + theta the generated power eta corresponding to unit length can be found according to the performance of the photovoltaic panel i ；
Regarding the vertical/horizontal distance between two adjacent rows of photovoltaic panel fixing points:
L i，i+1 ＝f(X i ，Y i ，Z i ，X i+1 ，Y i+1 ，Z i+1 )，H i，i+1 ＝g(X i ，Y i ，Z i ，X i+1 ，Y i+1 ，Z i+1 )；
regarding the width of the shielded part of the ith row of photovoltaic panels by the ith-1 row, namely the invalid width of the ith row of photovoltaic panels:
Wherein, the total power generation power P is the photoelectric conversion rate eta of each row of photovoltaic panels i Generally, there is a certain relationship between the incident angle of the sun and the angle of the photovoltaic panel, and when the angle of the photovoltaic panel is different, the photoelectric conversion rate will be slightly different. The formula of the embodiment is set based on slight difference of the photoelectric conversion efficiency of each row (table lookup adjustment needs to be performed according to actual conditions, so that the total generated power can be calculated only by knowing the effective width of the photovoltaic panel irradiated by the sun. In the actual use process, the photoelectric conversion efficiency can be approximately regarded as an angle difference which neglects part of the photovoltaic panels and is used as a fixed value. Therefore, the total generated power can be calculated by knowing the effective width of the photovoltaic panel irradiated by the sun.
Regarding the total photoelectric conversion rate P:
namely:
(note: in the engineering, an iterative solution mode is applied, and a sufficiently small residual threshold value epsilon is set, and when the residual threshold value epsilon is obtained
Then, the angle at which the conversion rate eta approaches the maximum is obtained
Optimal solution).
As an example of practical implementation in engineering, based on the limitation of controlling the adjustable angle of the photovoltaic panel by the stepping motor, the angle adjustment of each photovoltaic panel is in a step-by-step adjustment mode, that is, there is a single minimum adjustment angle epsilon, and the adjustment angle is an integral multiple of epsilon, and the adjustment range is: -90 ° to 90 °; the angle at which each photovoltaic panel can be set is therefore common
Selection of a number of different angles. For N rows of independently regulated photovoltaic panels, there is N n Different combinations are possible. In the process of obtaining the optimal solution of each photovoltaic panel, an algorithm is applied to traverse the N n And (4) carrying out angle setting combination, calculating the total generated power of all the photovoltaic panels under each combination, and finding the angle combination corresponding to the maximum generated power to obtain the optimal solution of the angle setting.
S203: calculating and obtaining the total generated power of the photovoltaic panels according to the effective width of each photovoltaic panel; and obtaining the angle combination of the photovoltaic panel when the total power generation power is maximum, and adjusting the photovoltaic panel according to the angle combination.
In step S202, there are two methods for calculating the photovoltaic panel angle when the total generated power is maximum:
the first is that
Then, the total power generation power of all the photovoltaic panels is the maximum value to calculate the angle of each photovoltaic panel
Optimal solution (i.e. angle combination of individual photovoltaic panels), then according to angle
The photovoltaic panels are adjusted by the optimal solution, so that the total generated power of all the photovoltaic panels is adjusted along with the change of time and solar altitude angle, and the purpose of optimally using all the photovoltaic panels is achieved. The second kind is based on the limitation of step motor control photovoltaic panel's adjustable angle, and the angle modulation of each photovoltaic panel is the mode of adjusting step by step, and there is single minimum angle of adjustment epsilon promptly, and the angle of adjustment is the integral multiple of epsilon, and the adjustment range is: in the case of-90 to 90, N can be traversed by applying an algorithm n And (4) setting combinations of angles, calculating the total generated power of all the photovoltaic panels under each combination, and finding the angle combination corresponding to the maximum generated power to obtain the optimal solution of the angle setting. And then adjusting the angle of each photovoltaic panel according to the optimal solution of the angle setting.
The core of the two ways is to obtain the maximum total generated power of the photovoltaic panel to adjust the angle of the photovoltaic panel. Therefore, repeated adjustment of the photovoltaic panel in practical application can be avoided through computer algorithm calculation, the time for automatically adjusting the orientation of the photovoltaic panel can be effectively shortened through system traversal calculation, and the overall power generation efficiency can be improved, and the angle adjustment cost can be reduced.
In practical application scenarios, the photovoltaic panel may have various disadvantages. If the foreign matter blocks the photovoltaic panel and partial photovoltaic panel faults, the abnormal power generation condition is caused. At this time, the angle combination of each photovoltaic panel calculated by the algorithm may not be the maximum generated power. It is necessary to detect a faulty photovoltaic panel and readjust the individual photovoltaic panel angle combinations. Detecting whether the difference value between the total generating power and the actual output generating power is larger than a first preset threshold value or not; if yes, adjusting the angle of the photovoltaic panel row by row to obtain the actual output generating power of the row. The first threshold value corresponds to the total generated power, and the value of the first threshold value is relatively large.
Generally, the total generated power and the actual output generated power have a certain deviation, but the deviation is within a reasonable value range, and if the deviation is beyond the reasonable value range, partial photovoltaic panels may be in failure. It is difficult to always obtain the maximum total generated power without eliminating the failed photovoltaic panel, and the failed photovoltaic panel also affects obtaining the optimal photovoltaic panel angle combination.
The following is a method for rapidly finding out the abnormal photovoltaic panel: and when the difference between the total generated power of the row and the actual output generated power of the row is larger than a second preset threshold value, judging that the row of photovoltaic panels is abnormal. The second threshold corresponds to the generated power of a row of photovoltaic panels, and the value of the generated power is relatively moderate.
If the row of photovoltaic panels is abnormal, adjusting the angles of the photovoltaic panels block by block to obtain the actual output power generation power of the block; and when the difference between the block total power generation power and the block actual output power generation power is larger than a third preset threshold value, judging that the block photovoltaic panel is abnormal. The third threshold corresponds to the generated power of one photovoltaic panel, and the value of the generated power is relatively minimum. And engineers can quickly find out the corresponding failed photovoltaic panel according to the troubleshooting condition of the system, and then repair and troubleshoot the failed photovoltaic panel. When the corresponding repair cannot be found in a short time, the area of the failed photovoltaic panel, which covers other photovoltaic panels, can be minimized according to the position of the failed photovoltaic panel, and the angle combination of the sub-photovoltaic panels at the time of the maximum value of the sub-total generated power is obtained through traversal again. S204: when the photovoltaic panels with the same vibration frequency are detected, the vibration frequency of the photovoltaic panels with the same vibration frequency is changed until resonance is eliminated.
Because the maximum total power generation is required, the angles of the adjusted photovoltaic panels are possibly consistent. Meanwhile, the wind power level and the wind direction change in the current area are not too large, so that the probability of resonance generation is higher once the photovoltaic angle is the same. Due to the fact that the wind power level and the wind direction of part of photovoltaic angles are changed due to terrain or other factors, even if the angles of the photovoltaic panels have different or different windward angles, resonance can be generated among the photovoltaic panels. The angle of the photovoltaic panel and the windward angle of the photovoltaic panel need to be simply converted according to the current wind direction. In order to reduce or avoid resonance between the photovoltaic panels, the vibration frequency of the current photovoltaic panel can be detected, and then the vibration frequency of one of the photovoltaic panels can be changed. The vibration frequency of the same photovoltaic panel can be changed by a driver or by changing the angle of the photovoltaic panel.
Meanwhile, the amount of discharge power of the photovoltaic panel may be consumed at every moment due to the change of the driver. And thus to ensure the power generation efficiency of the photovoltaic panel. Energy consumption calculation can be carried out on the driver by changing the angle of the photovoltaic panel, and then the generated energy reduced by the total generated power is calculated by changing the angle of the photovoltaic panel; comparing the energy consumption of the driver with the reduced power generation amount, and then enabling the system to execute a change scheme with the least energy consumption. Here, the energy consumption refers to electric energy consumed in unit time. The electric energy consumed by the driver when the driver works for a period of time and the electricity generated by reducing the generating efficiency by changing the angle of the photovoltaic panel belong to energy consumption. Therefore, the hidden dangers that the support is distorted and unstable due to resonance, the safety of the photovoltaic panel support is endangered and the like can be prevented under the condition of high-efficiency power generation.
As shown in fig. 5, the embodiment further includes a photovoltaic panel resonance adjusting apparatus, which includes a positioning data acquiring module, a photovoltaic panel information module, a power generation calculating module, an angle adjusting module, and a vibration frequency adjusting module; each module is in signal connection;
the positioning data acquisition module is used for acquiring the three-dimensional coordinates of each photovoltaic panel, the width of each photovoltaic panel and the relative position between two adjacent rows of photovoltaic panels; the photovoltaic panel information module is used for acquiring the solar incident angle of each photovoltaic panel; the generating power calculating module is used for calculating the effective width of each photovoltaic panel which is not shielded according to the three-dimensional coordinates, the width of the photovoltaic panel, the relative position and the solar incident angle; calculating the total power generation power of the photovoltaic panels according to the effective width of each photovoltaic panel; the angle adjusting module is used for adjusting each photovoltaic panel according to the angle of the photovoltaic panel when the total generating power is maximum. The step of judging whether the total power generation power is maximum is specifically as follows: traversing the angle combination of each photovoltaic panel, and selecting the maximum value of the total generated power in each combination as the maximum value. The vibration frequency adjusting module is used for detecting whether photovoltaic panels with the same vibration frequency exist or not; if so, changing the vibration frequency of the photovoltaic panel with the same vibration frequency until resonance is eliminated.
Changing the vibration frequency of the photovoltaic panel with the same vibration frequency by using a driver or changing the angle of the photovoltaic panel; changing the driver to perform energy consumption calculation, and then calculating the power generation amount reduced by the total power generation power by changing the angle of the photovoltaic panel; and comparing the energy consumption reduction power generation amount of the driver, and executing a frequency change scheme with the least energy consumption.
It will be understood by those skilled in the art that all or part of the steps in the embodiments may be implemented by hardware instructions of a computer program, and the program may be stored in a computer readable medium, which may include various media capable of storing program codes, such as a flash memory, a removable hard disk, a read-only memory, a random access memory, a magnetic disk or an optical disk. In one embodiment, the present disclosure proposes a computer-readable medium having a computer program stored therein, the computer program being loaded and executed by a processing module to implement a photovoltaic panel angle adjustment method.
The various embodiments or features mentioned herein may be combined with each other as additional alternative embodiments without conflict, within the knowledge and ability level of those skilled in the art, and a limited number of alternative embodiments formed by a limited number of combinations of features not listed above are still within the skill of the disclosed technology, as will be understood or inferred by those skilled in the art from the figures and above.
Moreover, the descriptions of the various embodiments are expanded upon with varying emphasis, and where not already described, may be had by reference to the prior art or other related descriptions herein.
It is emphasized that the above-mentioned embodiments, which are typical and preferred embodiments of the disclosure, are only used for explaining and explaining the technical solutions of the disclosure in detail for the reader to understand, and do not limit the scope of protection or application of the disclosure. Any modifications, equivalents, improvements and the like made within the spirit and principle of the present disclosure should be construed as being included in the scope of the present disclosure.
Claims (10)
1. A resonance adjusting method of a photovoltaic panel is characterized by comprising the following steps: acquiring a first windward angle, a first wind power level and a first wind direction of a first photovoltaic panel; obtaining a first vibration frequency of a first photovoltaic panel according to the first windward angle, the first wind power level and the first wind direction; acquiring the windward angle, the second wind power level and the second wind direction of a second photovoltaic panel; obtaining a second vibration frequency of a second photovoltaic panel according to the second windward angle, the second wind power level and the second wind direction; when the first vibration frequency and the second vibration frequency form resonance, the first vibration frequency is changed.
2. The resonance adjustment method according to claim 1, characterized in that: the changing of the first vibration frequency is changing with a driver and/or changing the first vibration frequency by changing the first angle of attack.
3. A resonance adjusting method and device for a photovoltaic panel are characterized in that: the system comprises a windward angle acquisition module, a wind power information acquisition module and a vibration frequency adjustment module; each module is in signal connection; the windward angle acquisition module is used for acquiring a first windward angle of the first photovoltaic panel and a second windward angle of the second photovoltaic panel; the wind power information acquisition module is used for acquiring a first wind power level and a first wind direction when the first photovoltaic panel faces the wind, and a second wind power level and a second wind direction when the second photovoltaic panel faces the wind; the vibration frequency adjusting module is used for obtaining a second vibration frequency of the photovoltaic panel according to the second windward angle, the second wind power level and the second wind direction; and judging whether the first vibration frequency and the second vibration frequency form resonance or not, and if so, changing the first vibration frequency.
4. A resonance adjusting method of a photovoltaic panel is characterized by comprising the following steps: acquiring three-dimensional coordinates of the photovoltaic panels, widths of the photovoltaic panels and relative positions between two adjacent rows of photovoltaic panels; obtaining angles of each photovoltaic panel; calculating the effective width of each photovoltaic panel which is not shielded according to the three-dimensional coordinates, the width of the photovoltaic panel, the relative position and the angle of the photovoltaic panel; calculating and obtaining the total generated power of the photovoltaic panels according to the effective width of each photovoltaic panel; acquiring the angle combination of the photovoltaic panel when the total power generation power is maximum, and adjusting the photovoltaic panel according to the angle combination; when the photovoltaic panels with the same vibration frequency are detected, the vibration frequency of the photovoltaic panels with the same vibration frequency is changed until resonance is eliminated.
5. The resonance adjustment method according to claim 4, characterized in that: the step of obtaining the photovoltaic panel angle combination when the total power generation power is maximum specifically comprises the following steps: and traversing and comparing the total generated power of the photovoltaic panels, and obtaining the angle combination of the photovoltaic panels when the total generated power is maximum after comparison.
6. The resonance adjustment method according to claim 4, characterized in that: the step of obtaining the photovoltaic panel angle at which the total generated power is maximum comprises: the solar altitude is theta, the width of the photovoltaic panel is D, and the three-dimensional coordinate of the photovoltaic panel is obtained as (X) i ,Y i ,Z i ) Obtaining the angle alpha of each row of photovoltaic panels i Obtaining the solar incident angle beta of each row of photovoltaic panels i Wherein beta is i ＝α i + theta, and the generated power eta corresponding to the unit length can be obtained according to the performance of the photovoltaic panel i ；
Calculating to obtain the vertical/horizontal distance between two adjacent rows of photovoltaic panel fixed points:
L i，i+1 ＝f(X i ，Y i ，Z i ，X i+1 ，Y i+1 ，Z i+1 )，H i，i+1 ＝g(X i ，Y i ，Z i ，X i+1 ，Y i+1 ，Z i+1 )
calculating the invalid width of the shielded part of the ith row of photovoltaic panels by the ith-1 row:
obtaining total generated power P:
7. The resonance adjustment method according to any one of claims 4 to 6, characterized in that: the vibration frequency of the photovoltaic panel with the same vibration frequency is changed by using a driver or changing the angle of the photovoltaic panel.
8. The resonance adjustment method according to claim 7, characterized in that: changing the driver to perform energy consumption calculation, and then calculating the power generation amount reduced by the total power generation power by changing the angle of the photovoltaic panel; and comparing the energy consumption of the driver with the reduced power generation amount, and executing a change scheme with the least energy consumption.
9. A photovoltaic panel resonance adjusting device is characterized in that: the device comprises a positioning data acquisition module, a photovoltaic panel information module, a power generation power calculation module, an angle adjustment module and a vibration frequency adjustment module; each module is in signal connection; the positioning data acquisition module is used for acquiring the three-dimensional coordinates of each photovoltaic panel, the width of each photovoltaic panel and the relative position between two adjacent rows of photovoltaic panels; the photovoltaic panel information module is used for acquiring the solar incident angle of each photovoltaic panel; the generating power calculating module is used for calculating the effective width of each photovoltaic panel which is not shielded according to the three-dimensional coordinates, the width of the photovoltaic panel, the relative position and the solar incident angle; calculating the total generated power of the photovoltaic panels according to the effective width of each photovoltaic panel; the angle adjusting module is used for adjusting the photovoltaic panels according to the angles of the photovoltaic panels when the total generated power is maximum; the vibration frequency adjusting module is used for detecting whether the photovoltaic panels with the same vibration frequency exist or not; if so, changing the vibration frequency of the photovoltaic panel with the same vibration frequency until resonance is eliminated.
10. The resonance tuning apparatus of claim, wherein: changing the vibration frequency of the photovoltaic panel with the same vibration frequency by using a driver or changing the angle of the photovoltaic panel; changing the driver to calculate the energy consumption, and then changing the angle of the photovoltaic panel to calculate the reduced generating capacity of the total generating power; and comparing the energy consumption of the driver with the reduced power generation amount, and executing a frequency change scheme with the least energy consumption.
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