CN113419260A - Photovoltaic module shaking detection method and device and photovoltaic power station system - Google Patents
Photovoltaic module shaking detection method and device and photovoltaic power station system Download PDFInfo
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- G01S19/39—Determining a navigation solution using signals transmitted by a satellite radio beacon positioning system the satellite radio beacon positioning system transmitting time-stamped messages, e.g. GPS [Global Positioning System], GLONASS [Global Orbiting Navigation Satellite System] or GALILEO
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Abstract
The invention relates to the technical field of photovoltaic power generation, and discloses a photovoltaic module shaking detection method, a shaking detection device and a photovoltaic power station system, wherein the photovoltaic module shaking detection method comprises the following steps: step S1, obtaining position information of the photovoltaic module, wherein the position information of the photovoltaic module comprises a relative coordinate P of the photovoltaic module relative to a reference device; step S2, comparing the position information of the photovoltaic module with the initial position information of the photovoltaic module, wherein the initial position information of the photovoltaic module comprises an initial relative coordinate P0 of the photovoltaic module relative to the reference device when the photovoltaic module is not shaken; and step S3, sending an alarm when the position information of the photovoltaic module is abnormal. The photovoltaic module shaking detection method can detect the shaking condition of the photovoltaic module and send out an alarm before the photovoltaic module overturns, so that property safety and personal safety of operators are protected. In addition, whether the position information of the photovoltaic module is abnormal or not is judged based on the relative coordinates of the reference device, and the detection precision is high.
Description
Technical Field
The invention relates to the technical field of photovoltaic power generation, in particular to a shaking detection method and device for a photovoltaic module and a photovoltaic power station system.
Background
The existing photovoltaic power station mainly adopts a photovoltaic module to generate electricity, the photovoltaic module mainly comprises a photovoltaic panel and a supporting structure used for supporting the photovoltaic panel, and the supporting structure is usually made of a tubular pile structure or a steel structure. Because the array area of photovoltaic module is great usually, under the windy state, bearing structure easily produces and rocks, when rocking amplitude is too big, very easily causes the damage to bearing structure and photovoltaic panel, causes loss of property, even personal safety accident. In current photovoltaic power plant, monitor photovoltaic module through a small number of camera monitoring usually, can only rock and overturn the back at bearing structure, can learn through the control of making a video recording, can not rock and overturn at bearing structure and obtain its condition of rocking before to take corresponding measure in advance. With the development of the technology, some automatic detection devices are used for detecting the shaking condition of the photovoltaic module. However, the automatic detection device often directly detects the photovoltaic module, random errors exist in the automatic detection device in each detection process, and the measurement accuracy is poor.
Disclosure of Invention
The invention aims to provide a method for detecting the shaking of a photovoltaic module, which can obtain the real-time shaking condition of the photovoltaic module, send out an alarm before the photovoltaic module overturns, prompt an operator to carry out corresponding protective measures in advance and protect property safety and personal safety of the operator.
Therefore, the invention adopts the following technical scheme:
a shaking detection method of a photovoltaic module comprises the following steps:
step S1, obtaining position information of the photovoltaic module, wherein the position information of the photovoltaic module comprises a relative coordinate P of the photovoltaic module relative to a reference device;
step S2, comparing the position information of the photovoltaic module with the initial position information of the photovoltaic module, wherein the initial position information of the photovoltaic module comprises an initial relative coordinate P0 of the photovoltaic module relative to the reference device when the photovoltaic module is not shaken;
and step S3, sending an alarm when the position information of the photovoltaic module is abnormal.
As a preferable embodiment of the method for detecting the sloshing of the photovoltaic module, the step S2 includes:
determining an offset coordinate D of the photovoltaic module, which is the difference between the relative coordinate P of the photovoltaic module and its initial relative coordinate P0;
and comparing the deviation coordinate D of the photovoltaic module with a preset deviation threshold value R, if the deviation coordinate D of the photovoltaic module is not in the range of the preset deviation threshold value R, the position information of the photovoltaic module is in an abnormal state, otherwise, the position information of the photovoltaic module is in a normal state, and when the position information of the photovoltaic module is in the normal state, returning to the step S1.
As a preferable scheme of the method for detecting the shaking of the photovoltaic module, the step S1 includes obtaining the position information of the photovoltaic module at a preset frequency f, and the step S2 further includes, before returning to the step S1:
calculating a deviation coefficient k of the photovoltaic module, and adjusting the preset frequency f according to the deviation coefficient k, wherein the deviation coefficient k is determined by a deviation coordinate D of the photovoltaic module and a preset deviation threshold value R of the photovoltaic module.
As a preferable embodiment of the method for detecting the sloshing of the photovoltaic module, in the step S2, after determining the deviation coordinate D of the photovoltaic module, the method further includes:
and obtaining the relation between the deviation coordinate D of the photovoltaic module and time in preset time, and predicting the deviation coordinate D of the photovoltaic module.
As a preferable scheme of the method for detecting the shaking of the photovoltaic module, in the step S2, when the position information of the photovoltaic module is in a normal state, determining the shaking frequency H of the photovoltaic module, comparing the shaking frequency H with a preset frequency threshold H, and if the shaking frequency H is within the range of the preset frequency threshold H, returning to the step S1; otherwise, if the wobble frequency h is abnormal, the step S3 is executed, and the step S3 further includes:
and giving an alarm when the shaking frequency h is abnormal.
As a preferable scheme of the sway detection method for the photovoltaic module, in the step S1, the relative coordinate P of the photovoltaic module includes relative coordinates P 'of a plurality of measurement points on the photovoltaic module with respect to the reference device, respectively, and in the step S2, the initial relative coordinate P0 of the photovoltaic module includes initial relative coordinates P0' of a plurality of measurement points on the photovoltaic module with respect to the reference device, respectively, when the photovoltaic module is not swayed; the step S2 includes:
determining an offset coordinate D of the photovoltaic module, the offset coordinate D of the photovoltaic module being determined by offset coordinates D 'of a plurality of the measurement points, the offset coordinate D' of the measurement points being the difference between the relative coordinate P 'of the measurement points and its initial relative coordinate P0'.
As a preferable embodiment of the method for detecting the shaking of the photovoltaic module, in the step S1, after obtaining the relative coordinates P' of the plurality of measurement points, the method further includes:
and fitting the relative coordinates P' of the plurality of measuring points to obtain the deviating profile of the photovoltaic module.
As a preferable embodiment of the method for detecting the sloshing of the photovoltaic module, before returning to the step S1 in the step S2, the method further includes:
and drawing the deviation cloud pictures of the photovoltaic components according to the deviation coordinates D of the photovoltaic components.
The invention has the beneficial effects that:
the invention provides a method for detecting the shaking of a photovoltaic module, which can send out an alarm when the position information of the photovoltaic module is abnormal by comparing the position information of the photovoltaic module with the initial position information of the photovoltaic module so as to prompt an operator to carry out corresponding protective measures and protect property safety and personal safety of the operator. In addition, whether the position information of the photovoltaic module is abnormal or not is judged through the relative coordinate of the photovoltaic module relative to the reference device, so that the detection error can be reduced, and the detection precision of the shaking detection method of the photovoltaic module is improved.
Another object of the present invention is to provide a sway detection device for a photovoltaic module, which is used to detect a sway condition of the photovoltaic module in real time, and send out an early warning to an operator before the photovoltaic module topples, so as to protect property safety of the photovoltaic module and personal safety of the operator.
Therefore, the invention adopts the following technical scheme:
a photovoltaic module shake detection device adopts the above photovoltaic module shake detection method, and the photovoltaic module shake detection device comprises:
the positioning module is used for obtaining the position information of the photovoltaic module;
the analysis module is in signal connection with the positioning module in a wired or wireless mode, and is configured to compare the position information of the photovoltaic module with the initial information of the photovoltaic module and judge whether the position information of the photovoltaic module is in an abnormal state or not;
the alarm module is in signal connection with the analysis module in a wired or wireless mode and is configured to give an alarm when the position information of the photovoltaic module is abnormal.
The invention has the beneficial effects that:
the invention provides a photovoltaic module shaking detection device which comprises a positioning module, an analysis module and an alarm module, wherein the photovoltaic module shaking detection device can acquire the shaking condition of a photovoltaic module in real time and send out early warning before the photovoltaic module topples, so that the effects of protecting property safety and personal safety of operators can be achieved.
Another objective of the present invention is to provide a photovoltaic power station system, which can detect the shaking condition of a photovoltaic module in real time, and send out an early warning before the photovoltaic module topples, so as to reduce the manpower required for monitoring, and ensure the property safety of the photovoltaic module and the personal safety of the operator.
Therefore, the invention adopts the following technical scheme:
a photovoltaic power station system comprises a photovoltaic assembly, a reference device and a shaking detection device of the photovoltaic assembly, wherein the photovoltaic assembly and the reference device are arranged at intervals, the shaking detection device of the photovoltaic assembly is configured to detect position information of the photovoltaic assembly, and the position information of the photovoltaic assembly comprises relative coordinates of the photovoltaic assembly relative to the reference device.
As a preferable scheme of the photovoltaic power station system, the photovoltaic module includes a photovoltaic panel and a supporting structure for supporting the photovoltaic panel, and a positioning module of the sway detection device of the photovoltaic module is disposed on the supporting structure.
The invention has the beneficial effects that:
the invention provides a photovoltaic power station system which comprises a photovoltaic module, a reference device and a photovoltaic module shaking detection device, wherein the photovoltaic module shaking detection device can obtain real-time position information of the photovoltaic module based on the reference device, so that the shaking condition of the photovoltaic module is detected in real time, early warning is given out before the photovoltaic module overturns, property safety of the photovoltaic module and personal safety of operators can be guaranteed, and manpower required for monitoring is reduced.
Drawings
Fig. 1 is a first flowchart of a method for detecting a shaking of a photovoltaic module according to an embodiment of the present invention;
FIG. 2 is a schematic structural diagram of a photovoltaic module and a reference device provided by an embodiment of the invention;
FIG. 3 is a schematic structural diagram of a photovoltaic module provided by an embodiment of the invention;
fig. 4 is a second flowchart of a shaking detection method for a photovoltaic module according to an embodiment of the present invention.
In the figure:
1-a photovoltaic panel; 2-a support structure;
100-a photovoltaic module;
200-a reference device;
300-GPS sensor.
Detailed Description
In order to make the technical problems solved, technical solutions adopted and technical effects achieved by the present invention clearer, the technical solutions of the embodiments of the present invention will be described in further detail below with reference to the accompanying drawings, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
As shown in fig. 1 to 4, the present embodiment provides a method for detecting a shaking of a photovoltaic module, including the following steps:
step S1, obtaining position information of the photovoltaic module 100, wherein the position information of the photovoltaic module 100 comprises a relative coordinate P of the photovoltaic module 100 relative to the reference device 200;
step S2, comparing the position information of the photovoltaic module 100 with the initial position information of the photovoltaic module 100, wherein the initial position information of the photovoltaic module 100 comprises an initial relative coordinate P0 of the photovoltaic module 100 relative to the reference device 200 when the photovoltaic module 100 is not shaken;
and step S3, sending an alarm when the position information of the photovoltaic module 100 is abnormal.
The photovoltaic module shaking detection method can detect the shaking condition of the photovoltaic module 100, obtain the real-time shaking condition, send out an alarm before the photovoltaic module 100 overturns, prompt an operator to carry out corresponding protective measures in advance, and protect property safety and personal safety of the operator. In addition, when the position information of the photovoltaic module 100 is obtained, a system error and a random error of the measuring device exist, the measuring precision of the position information of the photovoltaic module 100 is influenced, and the error of the measuring device during each measurement can be eliminated by comparing the relative coordinate P of the photovoltaic module 100 measured in real time with the initial relative coordinate P0 instead of directly comparing the three-dimensional coordinate of the photovoltaic module 100 measured in real time with the initial three-dimensional coordinate, so that the detection precision of the shake detection method of the photovoltaic module is improved, and the situation of false alarm is reduced.
Specifically, the relative coordinate P of the photovoltaic module 100 is equal to the difference between the three-dimensional coordinate of the photovoltaic module 100 and the three-dimensional coordinate of the reference device 200 at the same time, and the initial relative coordinate P0 of the photovoltaic module 100 is equal to the difference between the three-dimensional coordinate of the photovoltaic module 100 when no shaking occurs and the three-dimensional coordinate of the reference device 200 at the same time.
The reference device 200 is illustratively a booster station, which is robust and reliable, does not shake, and is suitable as a reference to reduce measurement errors of the position information of the photovoltaic module 100.
Further, step S2 includes:
determining a deviation coordinate D of the photovoltaic module 100, the deviation coordinate D of the photovoltaic module 100 being the difference between the relative coordinate P of the photovoltaic module 100 and its initial relative coordinate P0;
comparing the deviation coordinate D of the photovoltaic module 100 with the preset deviation threshold R, if the deviation coordinate D of the photovoltaic module 100 is not within the range of the preset deviation threshold R, the position information of the photovoltaic module 100 is in an abnormal state, otherwise, the position information of the photovoltaic module 100 is in a normal state, and when the position information of the photovoltaic module 100 is in the normal state, returning to step S1.
It is understood that the deviation coordinate D of the photovoltaic module 100 is based on a point corresponding to the initial relative coordinate P0 of the photovoltaic module 100, and the preset deviation threshold R is a corresponding three-dimensional region in the three-dimensional coordinate system based on a point corresponding to the initial relative coordinate P0 of the photovoltaic module 100.
In the present embodiment, the photovoltaic module 100 is insensitive to the shaking direction, that is, the preset deviation threshold R is shaped as a sphere, and the center of the sphere is the point corresponding to the initial relative coordinate P0 of the photovoltaic module 100. Certainly, the preset deviation threshold R is not limited to this, and in other cases, the photovoltaic module 100 may be sensitive to the shaking direction, for example, the photovoltaic module 100 may overturn only when shaking by a large amplitude in the horizontal direction, and overturn when shaking by a small amplitude in the vertical direction, and the three-dimensional shape of the corresponding preset deviation threshold R changes accordingly, and may be set according to actual detection needs, which is not limited in this embodiment.
In the present embodiment, step S1 includes obtaining the position information of the photovoltaic module 100 at the preset frequency f.
Since the closer the real-time position information of the photovoltaic module 100 is to the critical value of the preset deviation threshold R, the greater the shaking degree of the photovoltaic module 100 is, although the abnormal state is not yet reached, the possibility of reaching the abnormal state becomes greater, and if the position information of the photovoltaic module 100 is obtained at the previous preset frequency f, the photovoltaic module 100 may reach the abnormal state between two times of obtaining the real-time position information, which may affect the detection accuracy of the shaking detection method of the photovoltaic module. To solve the above problem, before returning to step S1, the method further includes, in step S2:
calculating a deviation coefficient k of the photovoltaic module 100, and adjusting the preset frequency f according to the deviation coefficient k, wherein the deviation coefficient k is determined by the deviation coordinate D and a preset deviation threshold value R thereof.
When the preset deviation threshold R is in the shape of a sphere, the deviation coefficient k can be defined as the ratio of the distance D between the point corresponding to the deviation coordinate D and the center of the circle thereof to the radius of the preset deviation threshold R, that is, the deviation coefficient k is D/R, the larger the deviation coefficient k is, the closer the position information of the photovoltaic module 100 is to the abnormal state is, the preset frequency f is correspondingly increased according to the deviation coefficient k, the shake detection precision of the photovoltaic module can be increased, and the early warning effect is good.
When the photovoltaic module 100 is sensitive to the sway direction, that is, the three-dimensional shape of the preset deviation threshold R is irregular, the deviation coefficient k may be defined as a ratio of a distance D between a point corresponding to the deviation coordinate D and a center of the circle thereof to a distance R between a critical point of the preset deviation threshold R and the center of the circle thereof, that is, the deviation coefficient k is D/R, where the critical point of the preset deviation threshold R is an intersection point between a connecting line between the point corresponding to the deviation coordinate D and the center of the circle and an outline of the preset deviation threshold R.
Certainly, the determining method of the deviation coefficient k is not limited to this, and the ratios of the components of the deviation coordinate D in the X axis, the Y axis and the Z axis to the critical points of the components corresponding to the preset deviation threshold R may be respectively compared, and the maximum value of the ratios may be used as the deviation coefficient k of the photovoltaic module 100, which may be set according to actual needs as long as the shaking severity of the photovoltaic module 100 can be reflected, and this embodiment does not limit this.
Preferably, in step S2, before returning to step S1, the method further includes:
the relation between the deviation coordinate D of the photovoltaic module 100 and the time in the preset time is obtained, and the deviation coordinate D is predicted, so that the shaking condition of the photovoltaic module 100 is analyzed and predicted, the supporting structure 2 in the photovoltaic module 100 is correspondingly adjusted, and the weak part of the supporting structure 2 is strengthened.
The relationship between the deviation coordinate D and the time can be directly obtained to analyze the shaking condition of the photovoltaic module 100 in the next period of time, the relationships between a plurality of components of the deviation coordinate D and the time can also be respectively obtained, the shaking condition of the photovoltaic module 100 is analyzed based on the component with the largest fluctuation amplitude, the relationship can be set according to actual needs, and the embodiment does not limit the relationship.
Preferably, in step S2, when the position information of the photovoltaic module 100 is in a normal state, the wobbling frequency h of the photovoltaic module 100 is determined.
Illustratively, the sloshing frequency h of the photovoltaic module 100 can be obtained based on the variation relationship of the component with the largest fluctuation amplitude and time. Of course, in other embodiments, the shaking frequency h of the photovoltaic module 100 may also be directly obtained from the change relationship between the offset coordinate D of the photovoltaic module 100 and time, and may be set according to the actual detection requirement, which is not limited in this embodiment.
Further, comparing the shaking frequency H of the photovoltaic module 100 with a preset frequency threshold H, and if the shaking frequency H is within the range of the preset frequency threshold H, the shaking frequency H is in a normal state, returning to step S1; otherwise, if the wobble frequency h is abnormal, step S3 is executed, and step S3 further includes:
and giving an alarm when the shaking frequency h is abnormal.
By comparing the relation between the shaking frequency H of the photovoltaic module 100 and the preset frequency threshold H, the detection precision of the shaking detection method of the photovoltaic module can be further improved, and even if the photovoltaic module 100 shakes at a small amplitude and a high frequency, the operator can be timely reminded and early warned.
Of course, in other embodiments, the preset frequency f may also be increased when the shaking frequency H of the photovoltaic module 100 is not within the range of the preset frequency threshold H, so as to avoid the photovoltaic module 100 from suddenly overturning, and the frequency may be set according to actual detection requirements, which is not limited in this embodiment.
Preferably, in order to improve the detection accuracy of the position information of the photovoltaic module 100 and avoid the accidental factors from interfering with the detection result, the relative coordinates P of the photovoltaic module 100 are obtained from a plurality of measurement points on the photovoltaic module 100. Specifically, in step S1, the relative coordinates P of the photovoltaic module 100 include relative coordinates P 'of the plurality of measurement points on the photovoltaic module 100 with respect to the reference device 200, respectively, and in step S2, the initial relative coordinates P0 of the photovoltaic module 100 include initial relative coordinates P0' of the plurality of measurement points with respect to the reference device 200, respectively, when the photovoltaic module 100 is not shaken; step S2 further includes:
an offset coordinate D of the photovoltaic module 100 is determined, the offset coordinate D of the photovoltaic module 100 being determined from offset coordinates D 'of a plurality of measurement points, the offset coordinate D' of a measurement point being the difference between the relative coordinate P 'of the measurement point and its initial relative coordinate P0'.
For example, the deviation coordinate D of the photovoltaic module 100 is an average value of deviation coordinates D' of a plurality of measurement points on the photovoltaic module 100. Of course, the method for determining the offset coordinate D of the photovoltaic module 100 from the offset coordinates D' of the plurality of measurement points on the photovoltaic module 100 is not limited thereto, and may be set according to actual measurement needs, and the present embodiment does not limit this.
Further, in step S1, after obtaining the relative coordinates P' of the plurality of measurement points, the method further includes:
the relative coordinates P' of the plurality of measuring points are fitted to obtain the deviation outline of the photovoltaic module 100, so that an operator can more intuitively obtain the shaking conditions of the photovoltaic module 100 at the current moment and different moments from the deviation outline of the photovoltaic module 100, the operator can conveniently determine the weak area of the photovoltaic module 100 through the shaking outline, and the weak area of the photovoltaic module 100 is selectively strengthened.
Preferably, in step S2, before returning to step S1, the method further includes:
and drawing the deviated cloud pictures of the photovoltaic modules 100 according to the deviated coordinates D of the photovoltaic modules 100.
By obtaining the deviation cloud charts of a plurality of photovoltaic modules 100 in one region, the whole region can be analyzed, the wind sensitive part can be judged, and corresponding wind prevention measures can be taken for the wind sensitive part, so that the wind resistance of the photovoltaic modules 100 in the region can be improved.
The deviation cloud chart may be a real-time deviation cloud chart of a plurality of photovoltaic modules 100 in each measurement, or a deviation cloud chart generated according to a maximum value or an average value of deviation coordinates D of each photovoltaic module 100 in a period of time, and may be set according to actual detection needs, which is not limited in this embodiment.
It can be understood that, in the present embodiment, the preset frequencies f of the photovoltaic modules 100 are all the same. Certainly, in other embodiments, the preset frequencies f of the photovoltaic modules 100 may also be different, for example, the wind sensitive area may adopt a higher preset frequency f, and the wind insensitive area adopts a lower preset frequency f, which may be set according to actual needs, and this embodiment does not limit this.
The embodiment further provides a shake detection device of a photovoltaic module, which adopts the shake detection method of the photovoltaic module, and the shake detection device of the photovoltaic module comprises:
a positioning module for obtaining position information of the photovoltaic module 100;
the analysis module is in signal connection with the positioning module in a wired or wireless mode, and is configured to compare the position information of the photovoltaic module 100 with the initial information of the photovoltaic module and judge whether the position information of the photovoltaic module 100 is in an abnormal state;
and the alarm module is in signal connection with the analysis module in a wired or wireless mode and is configured to give an alarm when the position information of the photovoltaic module 100 is in an abnormal state.
This photovoltaic module's detection device that rocks can detect and the early warning photovoltaic module 100's the condition of rocking, can acquire photovoltaic module 100 real-time condition of rocking to send out the police dispatch newspaper before photovoltaic module 100 topples, suggestion operating personnel carries out corresponding safeguard measure in advance, protection property safety and personnel safety.
Specifically, the positioning module includes a GPS sensor 300, and the GPS sensor 300 is disposed on the photovoltaic module 100 and is used for receiving signals of GPS satellites to position the photovoltaic module 100. It is understood that the GPS sensor 300 may be powered by a separately installed line, or may be powered by a micro energy storage device, and may be installed according to actual detection requirements.
Further, the analysis module includes a cloud platform, and the GPS sensor 300 transmits the position information of the photovoltaic module 100 to the cloud platform for comparison and analysis, and determines whether the position information of the photovoltaic module 100 is in an abnormal state.
It can be understood that the GPS sensor 300 can be directly connected with the cloud platform through a signal, and can also be connected with the cloud platform through a booster station or an inverter, and since the booster station and the inverter generally include communication parts, the communication parts can be saved by realizing the signal connection between the GPS sensor 300 and the cloud platform through the booster station or the inverter, and the cost of the shake detection device of the photovoltaic module is reduced.
The embodiment also provides a photovoltaic power station system, which comprises a photovoltaic module 100, a reference device 200 and the photovoltaic module sway detection device, wherein the photovoltaic module 100 and the reference device 200 are arranged at intervals, the photovoltaic module sway detection device is configured to detect the position information of the photovoltaic module 100, and the position information of the photovoltaic module 100 comprises the relative coordinates of the photovoltaic module 100 relative to the reference device 200.
This photovoltaic power plant system can obtain the real-time condition of rocking of photovoltaic module 100 through photovoltaic module's detection device that rocks to send the early warning to operating personnel before photovoltaic module 100 topples owing to rock, suggestion operating personnel carries out corresponding operation, can protect the property safety of photovoltaic module 100 and operating personnel's personal safety, can also reduce the required manpower of control.
The number of the photovoltaic modules 100 may be multiple, and the shake detection device of the photovoltaic modules can obtain the position information of the photovoltaic modules 100 in real time so as to detect the photovoltaic modules 100.
Optionally, the photovoltaic module 100 includes a photovoltaic panel 1 and a supporting structure 2 for supporting the photovoltaic panel 100, and a positioning module of the sway detection device of the photovoltaic module is disposed on the supporting structure 2 for acquiring real-time position information of the photovoltaic module 100. In particular, the positioning module comprises a GPS sensor 300, the GPS sensor 300 being arranged on the support structure 2. Further, the number of the GPS sensors 300 is plural, so as to measure the relative coordinates P' of a plurality of measurement points on the photovoltaic module 100, respectively, so as to improve the shake detection accuracy of the photovoltaic module 100.
In the description of the present specification, it is to be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of describing the present embodiment and simplifying the description, and do not indicate or imply that the device or structure referred to must have a specific orientation, be configured and operated in a specific orientation, and thus, cannot be construed as limiting the present invention. Furthermore, the terms "first" and "second" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. Wherein the terms "first position" and "second position" are two different positions.
In the description herein, references to the description of "an embodiment," "an example" or the like are intended to mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example.
Unless expressly stated or limited otherwise, the terms "mounted," "connected," and "secured" are to be construed broadly and encompass, for example, both fixed and removable connections; can be mechanically or electrically connected; either directly or indirectly through intervening media, either internally or in any other relationship. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.
Unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may include the first feature being in direct contact with the second feature, or may include the first feature being in direct contact with the second feature but being in contact with the second feature by another feature therebetween. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.
In addition, the foregoing is only the preferred embodiment of the present invention and the technical principles applied. It will be understood by those skilled in the art that the present invention is not limited to the particular embodiments described herein, but is capable of various obvious changes, rearrangements and substitutions as will now become apparent to those skilled in the art without departing from the scope of the invention. Therefore, although the present invention has been described in greater detail by the above embodiments, the present invention is not limited to the above embodiments, and may include other equivalent embodiments without departing from the spirit of the present invention, and the scope of the present invention is determined by the scope of the appended claims.
Claims (11)
1. A shaking detection method of a photovoltaic module is characterized by comprising the following steps:
step S1, obtaining position information of the photovoltaic module (100), wherein the position information of the photovoltaic module (100) comprises a relative coordinate P of the photovoltaic module (100) relative to a reference device (200);
step S2, comparing the position information of the photovoltaic module (100) with the initial position information of the photovoltaic module, wherein the initial position information of the photovoltaic module (100) comprises the initial relative coordinate P0 of the photovoltaic module (100) relative to the reference device (200) when the photovoltaic module is not shaken;
and step S3, sending an alarm when the position information of the photovoltaic module (100) is abnormal.
2. The method for detecting the shaking of the photovoltaic module according to claim 1, wherein the step S2 includes:
determining an off-set coordinate D of the photovoltaic component (100), the off-set coordinate D of the photovoltaic component (100) being the difference between the relative coordinate P of the photovoltaic component (100) and its initial relative coordinate P0;
comparing the deviation coordinate D of the photovoltaic module (100) with a preset deviation threshold value R, if the deviation coordinate D of the photovoltaic module (100) is not in the range of the preset deviation threshold value R, the position information of the photovoltaic module (100) is in an abnormal state, otherwise, the position information of the photovoltaic module (100) is in a normal state, and when the position information of the photovoltaic module (100) is in the normal state, returning to the step S1.
3. The method for detecting the sloshing of a photovoltaic module according to claim 2, wherein said step S1 includes obtaining the position information of the photovoltaic module (100) at a preset frequency f, and said step S2 further includes, before returning to said step S1:
calculating a deviation coefficient k of the photovoltaic module (100), and adjusting the preset frequency f according to the deviation coefficient k, wherein the deviation coefficient k is determined by a deviation coordinate D of the photovoltaic module (100) and a preset deviation threshold value R thereof.
4. The method for detecting the sloshing of the photovoltaic module according to claim 2, wherein the step S2 further comprises, after determining the deviation coordinate D of the photovoltaic module (100):
obtaining the relation between the deviation coordinate D of the photovoltaic module (100) in preset time and time, and predicting the deviation coordinate D of the photovoltaic module (100).
5. The method for detecting the sloshing of the photovoltaic module according to claim 1, wherein in the step S2, when the position information of the photovoltaic module (100) is in a normal state, determining a sloshing frequency H of the photovoltaic module (100), comparing the sloshing frequency H with a preset frequency threshold H, and if the sloshing frequency H is within the range of the preset frequency threshold H, returning to the step S1; otherwise, if the wobble frequency h is abnormal, the step S3 is executed; the step S3 further includes:
and giving an alarm when the shaking frequency h is abnormal.
6. The method for detecting sloshing of a photovoltaic module according to claim 1, wherein in step S1, the relative coordinate P of the photovoltaic module (100) includes relative coordinates P 'of a plurality of measurement points on the photovoltaic module (100) with respect to the reference device (200), respectively, and in step S2, the initial relative coordinate P0 of the photovoltaic module (100) includes initial relative coordinates P0' of a plurality of measurement points of the photovoltaic module (100) with respect to the reference device (200), respectively, when the photovoltaic module (100) is not sloshing; the step S2 includes:
-determining an off-set coordinate D of the photovoltaic module (100), the off-set coordinate D of the photovoltaic module (100) being determined from off-set coordinates D 'of a plurality of the measurement points, the off-set coordinates D' of the measurement points being the difference between the relative coordinates P 'of the measurement points and their initial relative coordinates P0'.
7. The method for detecting the shaking of the photovoltaic module according to claim 6, wherein in the step S1, after obtaining the relative coordinates P' of the plurality of measurement points, the method further comprises:
fitting the relative coordinates P' of the plurality of measurement points to obtain an offset profile of the photovoltaic module (100).
8. The method for detecting the sloshing of the photovoltaic module according to claim 2 or 6, wherein in the step S2, before returning to the step S1, the method further comprises:
-plotting off-cloud plots of a plurality of said photovoltaic modules (100) according to their off-coordinates D.
9. A photovoltaic module sway detection apparatus, characterized in that the photovoltaic module sway detection method according to any one of claims 1 to 8 is employed, the photovoltaic module sway detection apparatus comprising:
a positioning module for obtaining position information of the photovoltaic module (100);
the analysis module is in signal connection with the positioning module in a wired or wireless mode, and is configured to compare the position information of the photovoltaic module (100) with the initial information of the photovoltaic module and judge whether the position information of the photovoltaic module (100) is in an abnormal state or not;
the alarm module is in signal connection with the analysis module in a wired or wireless mode and is configured to give an alarm when the position information of the photovoltaic assembly (100) is abnormal.
10. A photovoltaic power plant system, characterized by comprising a photovoltaic module (100), a reference device (200) and a sway detection device of the photovoltaic module according to claim 9, the photovoltaic module (100) and the reference device (200) being arranged at a distance, the sway detection device of the photovoltaic module being configured to detect positional information of the photovoltaic module (100), the positional information of the photovoltaic module (100) comprising relative coordinates of the photovoltaic module (100) with respect to the reference device (200).
11. The photovoltaic power plant system according to claim 10, characterized in that the photovoltaic module (100) comprises a photovoltaic panel (1) and a support structure (2) for supporting the photovoltaic panel (1), the positioning module of the sloshing detection device of the photovoltaic module being arranged on the support structure (2).
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