CN115309194A - Method and device for improving generating capacity of photovoltaic tracking system - Google Patents
Method and device for improving generating capacity of photovoltaic tracking system Download PDFInfo
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Abstract
The invention belongs to the technical field of photovoltaics, and provides a method for improving the generated energy of a photovoltaic tracking system, which comprises the following steps: collecting current values of one or more photovoltaic string of a photovoltaic tracking system; comparing the change state of the current value of the photovoltaic string with the change state of the irradiation data of the corresponding time period to analyze, and judging the shadow shielding condition of the photovoltaic tracking system; and if the photovoltaic tracking system is shielded by the shadow, adjusting the tracking angle of the photovoltaic tracking system to eliminate the shadow shielding of the photovoltaic tracking system. The method is used for judging whether the interior of the photovoltaic array is shielded or not through real-time irradiation and real-time photovoltaic group string current change values when the interior of the photovoltaic tracking system array is shielded in a topographic relief area, and adjusting the angle of the photovoltaic tracking system in time according to the shadow shielding condition, so that the shadow shielding among the photovoltaic tracking system arrays is avoided, the inverse tracking algorithm of the photovoltaic tracking system is optimized, and the generating capacity of the photovoltaic tracking system is improved.
Description
Technical Field
The invention relates to the technical field of photovoltaics, in particular to a method and a device for improving the generated energy of a photovoltaic tracking system.
Background
When the traditional photovoltaic tracking system runs along the running track of the sun, shadow shielding can be caused between rows of the photovoltaic tracking system array due to the fact that the height angle of the sun is reduced in the morning and at night. In an environment with flat terrain, a reverse tracking technology (rotating in the opposite direction of the running of the sun) can be adopted to avoid shadow shielding in a photovoltaic tracking system array, and for an environment with fluctuating terrain and slope, a photovoltaic tracking system control system calculates terrain data, relative altitude difference of the photovoltaic tracking system and other parameters to calculate shadow shielding conditions so as to avoid the internal shielding of the photovoltaic tracking system array, but the mode lacks real-time real feedback of the shadow state of a component.
If the shadow shielding condition of the photovoltaic tracking system array is required to be obtained, the industry generally adopts a method of combining the photovoltaic string running data of the inverter to judge whether shadow shielding (string power dip or string current dip) occurs, but because the inverter usually has a certain distance with a photovoltaic tracking system controller, the inverter needs to obtain the real-time string running data from the inverter system end in a wired mode or a wireless mode, and the following problems exist in the actual operation process: the wired approach requires the consumption of a large number of cables; the input end of each string of the inverter needs to be matched with the photovoltaic strings on each photovoltaic tracking system, and a large amount of manpower is consumed for matching confirmation work during actual operation; in a wired mode, because the inverter system and the photovoltaic tracking system control system are 2 types of products of 2 manufacturers, data transmission between the inverter system and the photovoltaic tracking system has a certain time delay, and a real shielding state is difficult to obtain accurately in time; in a wireless mode, because the inverter system and the photovoltaic tracking system are 2 types of products of 2 manufacturers, data transmission between the inverter system and the photovoltaic tracking system is delayed for a long time, and the real shielding state cannot be timely and accurately acquired.
Disclosure of Invention
Aiming at the problem, the invention provides a method and a device for improving the generating capacity of a photovoltaic tracking system.
In order to achieve the above object of the present invention, the present invention is achieved by the following techniques:
in one aspect, the invention provides a method for improving the power generation capacity of a photovoltaic tracking system, which comprises the following steps:
collecting current values of one or more photovoltaic string of a photovoltaic tracking system;
comparing the change state of the current value of the photovoltaic string with the change state of the irradiation data of the corresponding time period to analyze, and judging the shadow shielding condition of the photovoltaic tracking system;
and if the photovoltaic tracking system is judged to be shielded by the shadow, adjusting the tracking angle of the photovoltaic tracking system to eliminate the shadow shielding of the photovoltaic tracking system.
In some embodiments, the collecting current values for one or more strings of photovoltaic strings of a photovoltaic tracking system comprises:
and arranging a current sensor, enabling a photovoltaic string cable of the photovoltaic tracking system to pass through the current sensor, and acquiring a photovoltaic string current value on the photovoltaic tracking system in real time by the current sensor.
In some embodiments, further comprising:
and comparing more than one photovoltaic module current value obtained by the current sensor, and taking the photovoltaic module string current value with larger current change as a basis for judging the shadow shielding condition of the photovoltaic tracking system.
In some embodiments, the analyzing, in combination with the change state of the irradiation data in the corresponding time period, the change state of the current value of the photovoltaic string to determine the shadow blocking condition of the photovoltaic tracking system includes:
continuously collecting the photovoltaic group string current value as a first photovoltaic group string current value, and continuously collecting the irradiation data of the corresponding time period as first irradiation data;
calculating a first current change value and a first irradiation change value based on the first photovoltaic string current value and the first irradiation data;
if the absolute value of the first current change value and the absolute value of the first irradiation change value keep a linear relation, judging that the photovoltaic tracking system is not shaded;
if the absolute value of the first current change value exceeds the preset range of the absolute value of the first irradiation change value, judging that the photovoltaic tracking system is shaded;
and if the photovoltaic tracking system is judged to be shaded by the shadow, adjusting the photovoltaic tracking system to rotate in the direction opposite to the running direction of the sun so as to increase the tracking angle of the photovoltaic tracking system.
In some embodiments, if the photovoltaic tracking system is shaded by a shadow, adjusting a tracking angle of the photovoltaic tracking system, and after rotating in a direction opposite to the sun operation, the method further includes:
continuously collecting the current value of the photovoltaic string as a second current value of the photovoltaic string, and simultaneously continuously collecting the irradiation data of the corresponding time period as second irradiation data;
calculating a second current change value and a second irradiation change value respectively based on the second photovoltaic string current value and the second irradiation value;
and if the absolute value of the second current change value and the absolute value of the second irradiation change value keep a linear relation, judging that the photovoltaic tracking system eliminates shadow occlusion, and if not, adjusting the photovoltaic tracking system to continue to rotate in the opposite direction of the sun operation so as to eliminate the shadow occlusion of the photovoltaic tracking system.
An electric energy production improving device of a photovoltaic tracking system comprises:
the collection module is used for collecting current values of one or more photovoltaic string of the photovoltaic tracking system;
the judging module is used for comparing the change state of the current value of the photovoltaic string to analyze in combination with the change state of the irradiation data in the corresponding time period, and judging the shadow shielding condition of the photovoltaic tracking system;
and the adjusting module is used for adjusting the tracking angle of the photovoltaic tracking system to eliminate the shadow occlusion of the photovoltaic tracking system if the shadow occlusion of the photovoltaic tracking system is judged to occur.
In some embodiments, the acquisition module is to:
and acquiring the current value of the photovoltaic string on the photovoltaic tracking system in real time.
In some embodiments, further comprising: a comparison module for:
and comparing more than one photovoltaic module current value obtained by the current sensor, and taking the photovoltaic module string current value with larger current change as a basis for judging the shadow shielding condition of the photovoltaic tracking system.
The method and the device for improving the generating capacity of the photovoltaic tracking system provided by the invention at least have the following beneficial effects:
1. the invention solves the problem that shadow shielding is difficult to obtain in time when shadow shielding occurs in the photovoltaic tracking system array in a topographic relief area, judges whether the inside of the photovoltaic array is shielded or not by flexibly setting the current sensor to obtain the real-time irradiation and the real-time photovoltaic string current change value in time, and adjusts the angle of the photovoltaic tracking system in time according to the shielding condition to avoid the shadow shielding between the photovoltaic tracking arrays.
2. The scheme of the invention further optimizes the inverse tracking algorithm of the supplementary photovoltaic tracking system and effectively improves the generated energy of the photovoltaic tracking system.
3. For photovoltaic tracking systems with different topographic relief areas and different lengths, the invention adopts a mode of flexibly arranging a plurality of current sensors, and solves the array shadow problem of the photovoltaic tracking system with low cost and high flexibility.
Drawings
The above features, technical features, advantages and implementation manners of the method and device for increasing the power generation capacity of a photovoltaic tracking system will be further described in the following detailed description of preferred embodiments in a clearly understandable manner and with reference to the accompanying drawings.
Fig. 1 is a schematic diagram of an embodiment of a method for increasing the power generation capacity of a photovoltaic tracking system according to the present invention;
FIG. 2 is a schematic diagram of an embodiment of a method for increasing power generation of a photovoltaic tracking system according to the present invention;
FIG. 3 is a schematic diagram of an embodiment of a method for increasing power generation of a photovoltaic tracking system according to the present invention;
fig. 4 is a schematic diagram of the hall current sensor of the present invention.
Detailed Description
In the following description, for purposes of explanation and not limitation, specific details are set forth, such as particular system structures, techniques, etc. in order to provide a thorough understanding of the embodiments of the present application. However, it will be apparent to one skilled in the art that the present application may be practiced in other embodiments that depart from these specific details. In other instances, detailed descriptions of well-known systems, devices, circuits, and methods are omitted so as not to obscure the description of the present application with unnecessary detail.
It will be understood that the terms "comprises" and/or "comprising," when used in this specification and the appended claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.
For the sake of simplicity, the drawings only schematically show the parts relevant to the present invention, and they do not represent the actual structure as a product. Moreover, in the interest of brevity and understanding, only one of the components having the same structure or function is illustrated schematically or designated in some of the drawings. In this document, "one" means not only "only one" but also a case of "more than one".
It should be further understood that the term "and/or" as used in this specification and the appended claims refers to and includes any and all possible combinations of one or more of the associated listed items.
In addition, in the description of the present application, the terms "first", "second", and the like are used only for distinguishing the description, and are not intended to indicate or imply relative importance.
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following description will be made with reference to the accompanying drawings. It is obvious that the drawings in the following description are only some examples of the invention, and that for a person skilled in the art, other drawings and embodiments can be derived from them without inventive effort.
In one embodiment, as shown in fig. 1, the present invention provides an embodiment of a method for increasing power generation of a photovoltaic tracking system, including:
s101, collecting current values of one or more photovoltaic string of the photovoltaic tracking system.
In this embodiment, a photovoltaic string dc cable near a controller of the photovoltaic tracking system is passed through the current sensor, and a photovoltaic string current value on the present official photovoltaic tracking system is collected in real time.
S102, comparing the change state of the current value of the photovoltaic string with the change state of the irradiation data in the corresponding time period, analyzing, and judging the shadow shielding condition of the photovoltaic tracking system.
In the present embodiment, the preset time period includes a morning and evening time period. In the early and late time periods, the authenticity of shadow shielding of the photovoltaic tracking system is judged in an auxiliary manner by analyzing the sudden drop condition of the current value of the photovoltaic group string and combining the change condition of the irradiation data.
S103, if it is determined that the photovoltaic tracking system is shaded, adjusting the tracking angle of the photovoltaic tracking system to eliminate the shade shading of the photovoltaic tracking system.
In the embodiment, based on the shadow shielding condition of the photovoltaic tracking system, whether the generated energy of the photovoltaic tracking system is affected or not is monitored in real time, a coping strategy is made in time, the power generation loss is reduced, and the power generation benefit is increased.
The embodiment provides a scheme for collecting photovoltaic string current in real time for a photovoltaic tracking system, which is used for judging whether the inside of a photovoltaic array is shaded by the shadow or not through real-time irradiation and real-time photovoltaic string current change values when the inside of the photovoltaic tracking system array is shaded in a topographic relief area, and adjusting the tracking angle of the photovoltaic tracking system in time according to the shadow shading condition, thereby optimizing the back tracking algorithm of the photovoltaic tracking system, avoiding the shadow shading between the photovoltaic tracking system arrays, and improving the power generation capacity of the photovoltaic tracking system.
In one embodiment, further comprising:
and preferentially selecting a sloping terrain area to collect the string current value of the photovoltaic tracking system according to the project terrain information of the photovoltaic tracking system.
In one embodiment, the collecting current values for one or more strings of photovoltaic strings of a photovoltaic tracking system comprises:
and arranging a current sensor, enabling a photovoltaic string cable of the photovoltaic tracking system to pass through the current sensor, and acquiring a photovoltaic string current value on the photovoltaic tracking system in real time by the current sensor.
In one embodiment, further comprising:
and comparing more than one photovoltaic module current value obtained by the current sensor, and taking the photovoltaic module string current value with larger current change as a basis for judging the shadow shielding condition of the photovoltaic tracking system.
In this embodiment, the maximum photovoltaic string current value of the photovoltaic string current values at the middle position of the photovoltaic tracking system and the terminal position of the photovoltaic tracking system is used as the photovoltaic string current value for determining the shielding condition of the photovoltaic tracking system.
In one embodiment, the analyzing the change state of the current value of the photovoltaic string in combination with the change state of the irradiation data of the corresponding time period to determine the shadow shielding condition of the photovoltaic tracking system includes:
continuously collecting the photovoltaic group string current value as a first photovoltaic group string current value, and continuously collecting the irradiation data of the corresponding time period as first irradiation data;
calculating a first current change value and a first irradiation change value based on the first photovoltaic string current value and the first irradiation data;
if the absolute value of the first current change value and the absolute value of the first irradiation change value keep a linear relation, judging that the photovoltaic tracking system is not shaded;
and if the absolute value of the first current change value exceeds the preset range of the absolute value of the first irradiation change value, judging that the photovoltaic tracking system is shaded.
Specifically, the photovoltaic string currents I1, I2 … … In and In +1 are continuously collected, and the irradiation data R1, R2 … … Rn and Rn +1 are continuously collected;
calculating the current change value by the formula: i1= (I2-I1)/I2, irradiation change value: r1= (R2-R1)/R2, obtaining I1, I2 … … In, and R1, R2 … … Rn;
if the absolute value of Ii (i =1, 2 … … n) and the absolute value trend of Ri are linear, then no occlusion occurs;
and if the absolute value of In exceeds the preset range of the absolute value of Rn, judging that the shielding occurs. The predetermined range is usually 10% to 30%.
In one embodiment, if the photovoltaic tracking system is shaded by a shadow, adjusting a tracking angle of the photovoltaic tracking system, and after rotating in a direction opposite to the direction of the sun operation, the method further includes:
continuously collecting the current value of the photovoltaic string as a second current value of the photovoltaic string, and simultaneously continuously collecting the irradiation data of the corresponding time period as second irradiation data;
calculating a second current change value and a second irradiation change value respectively based on the second photovoltaic string current value and the second irradiation value;
and if the absolute value of the second current change value and the absolute value of the second irradiation change value keep a linear relation, judging that the photovoltaic tracking system eliminates shadow occlusion, and if not, adjusting the photovoltaic tracking system to continue to rotate in the opposite direction of the sun operation so as to eliminate the shadow occlusion of the photovoltaic tracking system.
Specifically, collecting the photovoltaic string currents In +2, in +3 … … Im and Im +1, irradiating data Rn +2, rn +3 … … Rm and Rm +1, calculating In +1, in +2 … … Im and Im +1, and calculating Rn +1, rn +2 … … Rm and Rm +1;
and if the absolute value of Ij (j = n +1, n +2 … … m) and the absolute value of Rj keep a linear relation, judging that the shadow occlusion is eliminated, and if not, adjusting the angle of the photovoltaic tracking system to rotate towards the opposite direction of the sun operation so as to eliminate the shadow occlusion of the photovoltaic tracking system.
In one embodiment, the invention provides a method for improving the power generation capacity of a photovoltaic tracking system, which specifically comprises the following steps:
the current sensor device is used for collecting the current of the photovoltaic string in real time through the photovoltaic string direct current cable near the photovoltaic tracking system controller. The method comprises the following specific steps:
step 1: and selecting a sloping terrain area according to the project terrain information to implement the scheme. For example, the terrain slope is greater than 2 degrees, and the scheme has higher implementation value.
Step 2: a current sensor is used, a photovoltaic string direct current cable near a photovoltaic tracking system controller penetrates through the current sensor (such as an open-close type Hall current sensor), and a photovoltaic string current value on the photovoltaic tracking system is collected in real time.
Wherein, only one string of photovoltaic string dc cable (or two strings) is usually accommodated in the current sensor. Usually, a single cable is penetrated, and the current data acquired by the sensor is more accurate. The photovoltaic strings of a photovoltaic tracking system are typically 2-5 strings.
For a longer photovoltaic tracking system, the number of photovoltaic strings is multiple, in order to monitor the tracking angle of the photovoltaic tracking system at different positions and eliminate shadow influence, a string corresponding to the middle position of the photovoltaic tracking system and a string corresponding to the tail end position of the photovoltaic tracking system can be selected, current sensors are respectively and independently arranged, the current values obtained by the two current sensors are compared to judge the shadow influence, and the current sensor data greatly influenced by the current values is used as the angle adjusting basis of the photovoltaic tracking system.
And step 3: the photovoltaic tracking system control system collects irradiation in real time; the current sensor is in communication connection (both wired and wireless) with the controller, and transmits current data acquired by the current sensor to the controller.
And 4, step 4: during the early and late time periods (for example, before 9 o 'clock of local time and after 3 o' clock of afternoon), the authenticity of the occlusion is judged by analyzing the sudden drop condition of the photovoltaic array current and combining the change condition Rt of the irradiation data. Continuously acquiring group currents I1, I2 … … In and In +1 within time t (t can be 1 minute and 2 minutes), continuously acquiring irradiations R1, R2 … … Rn and Rn +1, calculating current change values I1= (I2-I1)/I2 and irradiation change values R1= (R2-R1)/R2 through formulas, acquiring I1, I2 … … In and R1 and R2 … … Rn, and judging that shielding occurs if the absolute value of Ii (I =1 and 2 … … n) and the absolute value trend of Ri are In a linear relation if shielding does not occur and the absolute value of In is greatly beyond the absolute value of Rn suddenly.
And 5: if the shading occurs, the tracking system is adjusted to rotate in the opposite direction of the sun running to enlarge the tracking angle, so that the shadow shading of the photovoltaic tracking system is eliminated.
Step 6: continuously collecting group current In +2, in +3 … … Im and Im +1, irradiating Rn +2, rn +3 … … Rm and Rm +1, calculating In +1, in +2 … … Im and Im +1, calculating Rn +1, rn +2 … … Rm and Rm +1, judging that shadow shielding is eliminated if the absolute value of Ij (j = n +1 and n +2 … … m) and the absolute value of Rj keep a linear relation, and otherwise, adjusting the angle of the photovoltaic tracking system to rotate In the opposite direction of the sun operation to eliminate the shadow shielding of the photovoltaic tracking system.
In this embodiment, as shown in fig. 2, the invention provides a method for increasing a power generation amount of a photovoltaic tracking system, which is applied to a time period after a sunrise in the morning, and specifically includes:
step 1.1, when the photovoltaic array is In a conventional tracking mode, collecting photovoltaic array current (I1, I2 … … In and In + 1) In real time after sunrise, and continuously collecting irradiation data (R1, R2 … … Rn and Rn + 1).
Step 1.2, calculating delta I1, delta I2 … … delta In and delta In +1, and calculating delta R1, delta R2 … … delta Rn and delta Rn +1.
Step 1.3, judging whether the delta In suddenly and greatly exceeds the delta Rn; if yes, entering step 1.4; if not, go to step 1.2.
And 1.4, when the delta In suddenly and greatly exceeds the delta Rn, reversely rotating the angle of the photovoltaic tracking system.
Step 1.5, collecting string currents (In +2 … … Im and Im + 1) In real time, and continuously collecting irradiation data (Rn +2 … … Rm and Rm + 1).
And 1.6, calculating delta In +1 … … delta Im and calculating delta Rn +1 … … delta Rm.
Step 1.7, judging whether the delta Im is close to the delta Rm; if yes, entering step 1.8; if not, go to step 1.4.
And 1.8, the photovoltaic tracking system keeps the angle.
Step 1.9, judging whether the current time is 9 am; if yes, entering a conventional tracking mode; if not, go to step 1.2.
In this embodiment, in the morning time period, through the analysis of the slump condition of photovoltaic group string current, combine the supplementary authenticity of judging the shadow and sheltering from of irradiation data change condition, promote the photovoltaic tracking system's of morning time generated energy.
In this embodiment, as shown in fig. 3, the present invention provides a method for increasing a power generation amount of a photovoltaic tracking system, which is applied to a time period before sunset in the afternoon, and specifically includes:
step 2.1, when the photovoltaic array is In a conventional tracking mode, collecting photovoltaic array current (I1, I2 … … In and In + 1) In real time after 3 pm at local time, and continuously collecting irradiation data (R1, R2 … … Rn and Rn + 1).
And 2.2, calculating delta I1, delta I2 … … delta In and delta In +1, and calculating delta R1, delta R2 … … delta Rn and delta Rn +1.
Step 2.3, judging whether the delta In suddenly and greatly exceeds the delta Rn; if yes, entering step 2.4; if not, go to step 2.1.
And 2.4, when the delta In suddenly and greatly exceeds the delta Rn, reversely rotating the angle of the photovoltaic tracking system.
And 2.5, collecting the string currents (In +2 … … Im and Im + 1) In real time, and continuously collecting irradiation data (Rn +2 … … Rm and Rm + 1).
And 2.6, calculating delta In +1 … … delta Im and calculating delta Rn +1 … … delta Rm.
Step 2.7, judging whether the delta Im is similar to the delta Rm; if yes, entering step 2.8; if not, go to step 2.4.
And 2.8, the photovoltaic tracking system keeps the angle.
Step 2.9, judging whether the current time reaches the local sunset time; if yes, entering a conventional tracking mode; if not, go to step 2.2.
In this embodiment, in the afternoon time period, through the analysis of the slump condition of photovoltaic group string current, combine the supplementary authenticity of judging the sheltering from of irradiation data change condition, promote the photovoltaic tracking system's of afternoon time generated energy.
In the embodiment, the applicability is strong to the terrain with large fluctuation and easy shielding of the photovoltaic tracking system in the array, and the gain to the generated energy is high. The current collection mode of this scheme is stable high, and the scheme is implemented and is possessed convenient quick back installation and measuring range is wide, characteristics such as accuracy height, and the generated energy of assurance photovoltaic tracker that can be more accurate receives the influence. Meanwhile, whether the generated energy of the photovoltaic tracking system is shielded by the shadow or not is monitored in real time, a coping strategy is made in time, the power generation loss is reduced, and the power generation benefit is increased.
In one embodiment, the present invention provides an apparatus for increasing power generation capacity of a photovoltaic tracking system, comprising:
and the acquisition module is used for acquiring the current values of one or more photovoltaic string of the photovoltaic tracking system.
And the judging module is used for comparing the change state of the current value of the photovoltaic string to analyze in combination with the change state of the irradiation data in the corresponding time period, and judging the shadow shielding condition of the photovoltaic tracking system.
And the adjusting module is used for adjusting the tracking angle of the photovoltaic tracking system to eliminate the shadow occlusion of the photovoltaic tracking system if the shadow occlusion of the photovoltaic tracking system is judged to occur.
In this embodiment, the current of the photovoltaic string is collected in a near manner through the device, and the shielding condition of the photovoltaic string on the photovoltaic tracking system can be fed back in real time, directly and accurately. Meanwhile, the current of the photovoltaic string is collected nearby, the scheme is easy to implement, and the material and installation labor cost is low. The device can stably, real-timely and precisely detect the magnitude of the current of the string, effectively avoid shadows and increase the yield of generated energy.
In one embodiment, further comprising: a selection module to:
and selecting a sloping terrain area to collect the current value of the photovoltaic string according to the project terrain information of the photovoltaic tracking system.
In one embodiment, the acquisition module is configured to:
and arranging a current sensor, enabling a photovoltaic string cable of the photovoltaic tracking system to pass through the current sensor, and acquiring a photovoltaic string current value on the photovoltaic tracking system in real time by the current sensor.
In one embodiment, further comprising: a comparison module for:
and comparing more than one photovoltaic module current value obtained by the current sensor, and taking the photovoltaic module string current value with larger current change as a basis for judging the shadow shielding condition of the photovoltaic tracking system.
And taking the maximum photovoltaic string current value in the photovoltaic string current values at the middle position of the photovoltaic tracking system and the tail end position of the photovoltaic tracking system as the photovoltaic string current value for judging the shielding condition of the photovoltaic tracking system.
In this embodiment, a current sensor (for example, an open-close type hall current sensor) and other devices are used to collect a photovoltaic string current in real time from a photovoltaic string direct current cable near a photovoltaic tracking system controller, and the scheme specifically includes the following steps: enabling a photovoltaic string direct-current cable near a photovoltaic tracking system controller to penetrate through a current sensor, and collecting a photovoltaic string current value on the photovoltaic tracking system in real time; in the early and late time periods, the authenticity of shielding is judged in an auxiliary manner by analyzing the sudden drop condition of the current of the photovoltaic string and combining the change condition of irradiation data; if the shading occurs, the angle of the photovoltaic tracking system is adjusted to rotate in the direction opposite to the direction of the sun operation, so that the shading of the shadow of the photovoltaic tracking system is eliminated.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-described division of program modules is illustrated, and in practical applications, the above-described distribution of functions may be performed by different program modules, that is, the internal structure of the apparatus may be divided into different program units or modules to perform all or part of the above-described functions. Each program module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one processing unit, and the integrated unit may be implemented in a form of hardware, or may be implemented in a form of software program unit. In addition, the specific names of the program modules are only used for distinguishing the program modules from one another, and are not used for limiting the protection scope of the application.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or recited in detail in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus and method may be implemented in other ways. The above-described embodiments of the apparatus are merely exemplary, and the division of the modules or units is merely an example of a logical division, and there may be other divisions when the actual implementation is performed, and for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection of some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment.
In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
It should be noted that the above embodiments can be freely combined as necessary. The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, various modifications and amendments can be made without departing from the principle of the present invention, and these modifications and amendments should also be considered as the protection scope of the present invention.
Claims (8)
1. The method for improving the generating capacity of the photovoltaic tracking system is characterized by comprising the following steps:
collecting current values of one or more photovoltaic string of a photovoltaic tracking system;
comparing the change state of the current value of the photovoltaic string with the change state of the irradiation data of the corresponding time period for analysis, and judging the shadow shielding condition of the photovoltaic tracking system;
and if the photovoltaic tracking system is judged to be shielded by the shadow, adjusting the tracking angle of the photovoltaic tracking system to eliminate the shadow shielding of the photovoltaic tracking system.
2. The method according to claim 1, wherein the acquiring current values of one or more photovoltaic string of the photovoltaic tracking system comprises:
and arranging a current sensor, enabling a photovoltaic string cable of the photovoltaic tracking system to pass through the current sensor, and acquiring a photovoltaic string current value on the photovoltaic tracking system in real time by the current sensor.
3. The method for increasing the power generation capacity of the photovoltaic tracking system according to claim 2, further comprising:
and comparing more than one photovoltaic module current value obtained by the current sensor, and taking the photovoltaic module string current value with larger current change as a basis for judging the shadow shielding condition of the photovoltaic tracking system.
4. The method for improving the power generation capacity of the photovoltaic tracking system according to any one of claims 1 to 3, wherein the analyzing the change state of the current value of the photovoltaic string in combination with the change state of the irradiation data of the corresponding time period to judge the shadow shielding condition of the photovoltaic tracking system comprises:
continuously collecting the photovoltaic group string current value as a first photovoltaic group string current value, and continuously collecting the irradiation data of the corresponding time period as first irradiation data;
respectively calculating a first current change value and a first irradiation change value based on the first photovoltaic string current value and the first irradiation data;
if the absolute value of the first current change value and the absolute value of the first irradiation change value keep a linear relation, judging that the photovoltaic tracking system is not shaded;
if the absolute value of the first current change value exceeds the preset range of the absolute value of the first irradiation change value, judging that the photovoltaic tracking system is shaded;
and if the photovoltaic tracking system is judged to be shaded by the shadow, adjusting the photovoltaic tracking system to rotate in the direction opposite to the running direction of the sun so as to increase the tracking angle of the photovoltaic tracking system.
5. The method for improving the power generation capacity of the photovoltaic tracking system according to claim 4, wherein after the photovoltaic tracking system is adjusted to rotate in the direction opposite to the sun when the photovoltaic tracking system is shaded by the shadow, the method further comprises:
continuously collecting the current value of the photovoltaic string as a second current value of the photovoltaic string, and simultaneously continuously collecting the irradiation data of the corresponding time period as second irradiation data;
calculating a second current change value and a second irradiation change value respectively based on the second photovoltaic string current value and the second irradiation value;
and if the absolute value of the second current change value and the absolute value of the second irradiation change value keep a linear relation, judging that the photovoltaic tracking system eliminates shadow occlusion, and if not, adjusting the photovoltaic tracking system to continue to rotate in the opposite direction of the sun operation so as to eliminate the shadow occlusion of the photovoltaic tracking system.
6. The utility model provides a photovoltaic tracking system's generated energy hoisting device which characterized in that includes:
the collection module is used for collecting current values of one or more photovoltaic string of the photovoltaic tracking system;
the judging module is used for analyzing the change state of the current value of the photovoltaic group string in combination with the change state of the irradiation data in the corresponding time period, and judging the shadow shielding condition of the photovoltaic tracking system;
and the adjusting module is used for adjusting the angle of the photovoltaic tracking system if the photovoltaic tracking system is judged to be shaded by the shadow.
7. The power generation capacity improving device of the photovoltaic tracking system as claimed in claim 6, wherein the collecting module is configured to:
and acquiring the current value of the photovoltaic string on the photovoltaic tracking system in real time.
8. The power generation amount improving device of the photovoltaic tracking system according to claim 7, wherein the judging module further comprises a comparing module for:
and comparing more than one current value of the photovoltaic module obtained by the current sensor, and taking the photovoltaic module string current value with larger current change as a basis for judging the shadow shielding condition of the photovoltaic tracking system.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116501099A (en) * | 2023-06-01 | 2023-07-28 | 深圳市迪晟能源技术有限公司 | Intelligent regulation and control system for vertical relation between photovoltaic and solar light rays |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116501099A (en) * | 2023-06-01 | 2023-07-28 | 深圳市迪晟能源技术有限公司 | Intelligent regulation and control system for vertical relation between photovoltaic and solar light rays |
| CN116501099B (en) * | 2023-06-01 | 2023-09-22 | 深圳市迪晟能源技术有限公司 | Intelligent regulation and control system for vertical relation between photovoltaic and solar light rays |
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