CN-122018569-A - Inverse tracking method and device applied to photovoltaic tracking system array and storage medium

CN122018569ACN 122018569 ACN122018569 ACN 122018569ACN-122018569-A

Abstract

The invention discloses an inverse tracking method and device applied to a photovoltaic tracking system array, and a storage medium, wherein the inverse tracking method comprises the steps of obtaining the center point coordinates of each photovoltaic tracking system, the length 2R of the photovoltaic component, the light incident angle alpha and the initial tracking angle beta at the moment, calculating the highest point coordinates (x 0 -Rcosβ,z 0 + Rsin beta) of the current row of tracking systems based on the center point coordinates (x 0 ,z 0 ) and beta of the current row of tracking systems, calculating the lowest point coordinates (x 1 +Rcosγ,z 1 -Rsin gamma) of the photovoltaic component of the next row of tracking systems based on the center point coordinates (x 1 ,z 1 ) and the inclination angle gamma of the next row of tracking systems, calculating the critical position height of the current row of tracking systems, which does not produce shadow shielding for the next row of tracking systems, based on the lowest point coordinates (x 1 +Rcosγ,z 1 -Rsin gamma) and alpha, calculating and calculating the critical position height of the current row of tracking systems according to an incident light formula Height of critical position And comparing the highest point height of the current row of photovoltaic tracking systems, and determining a tracking mode according to a comparison result. The photovoltaic array inverse tracking angle adjustment of the invention changes in real time according to the incident angle of the sun, and is suitable for any undulating terrain.

Inventors

YANG YING
CAO WEIJIE
ZHOU TAO
Feng Xingchen
SUN CHENG

Assignees

江苏中信博新能源科技股份有限公司

Dates

Publication Date: 20260512
Application Date: 20260331

Claims (10)

1. The inverse tracking method applied to a photovoltaic tracking system array is characterized in that the photovoltaic tracking system array comprises a plurality of photovoltaic tracking systems which are arranged at intervals in the east-west direction, each photovoltaic tracking system is arranged in a north-south extending mode, the method comprises the steps of defining a tracking system relatively close to the sun in the photovoltaic tracking system array as a front tracking system and a tracking system relatively far away from the sun as a rear tracking system, and the method comprises the following steps: s1, acquiring a center point coordinate and a photovoltaic module length 2R of each photovoltaic tracking system in a photovoltaic tracking system array, a light incident angle alpha at the current moment and an initial tracking angle beta of the photovoltaic tracking system at the moment; S2, calculating the coordinate of the highest point of the current row of tracking system at the moment to be (x 0 -Rcosβ,z 0 + Rsin beta) based on the coordinate of the central point of the current row of tracking system to be (x 0 ,z 0 ) and the initial tracking angle beta, and calculating the coordinate of the lowest point of the photovoltaic component of the subsequent row of tracking system at the moment to be (x 1 +Rcosγ,z 1 -Rsin gamma) based on the coordinate of the central point of the subsequent row of tracking system to be (x 1 ,z 1 ) and the inclination angle gamma of the subsequent row of tracking system; Based on the lowest point coordinate of the photovoltaic component of the next row of tracking systems (x 1 +Rcosγ,z 1 -Rsin gamma) and the light incidence angle alpha, calculating an incident light ray formula at the moment, and calculating the critical position height when the current row of tracking systems do not generate shadow shielding on the next row of tracking systems at the moment according to the incident light ray formula ; S3, the critical position height Compared with the highest point height z 0 + Rsin beta of the current row tracking system, if If not less than z 0 + Rsin β, indicating that the following row of tracking systems is in a non-shielding state, and enabling the current row of tracking systems to enter a normal tracking mode if the following row of tracking systems is in a normal tracking mode And < z h > represents that shadow shielding exists in the tracking system of the next row, the tracking system of the current row enters an inverse tracking mode, and the target inverse tracking angle of the tracking system of the current row is calculated.
2. The inverse tracking method applied to a photovoltaic tracking system array of claim 1, further comprising: taking a current row of tracking systems as a new next row of tracking systems, taking the adjacent previous row of tracking systems of the current row of tracking systems as the new current row of tracking systems, and recursively executing S2-S3 until the target inverse tracking angle calculation of the last row of tracking systems in the photovoltaic tracking system array is completed; And controlling all the photovoltaic tracking systems to rotate to corresponding target inverse tracking angles.
3. The method according to claim 1, wherein the calculating the formula of the incident light ray at this time based on the lowest point coordinates (x 1 +Rcosγ,z 1 -Rsin γ) of the photovoltaic modules of the following row of tracking systems and the light ray incident angle α comprises: Based on the lowest point coordinates (X 1 +Rcosγ,z 1 -Rsin γ) of the photovoltaic modules of the following row of tracking systems and the light incidence angle α, an incident light formula Z (X) =tanα [ X- (X 1 +Rcosγ)]+(z 1 -Rsin γ) of the lowest point of the photovoltaic modules of the following row of tracking systems is calculated.
4. The method of claim 3, wherein the step of calculating the critical position height when the highest point of the current row of tracking system does not shade the following row of tracking system according to the incident ray formula The method specifically comprises the following steps: Calculating the critical position height at the moment according to the incident ray formula Z (X) and the X 0 -Rcos beta of the highest point abscissa of the current row tracking system Tan α [ (x 0 -Rcosβ)-(x 1 +Rcosγ)]+(z 1 -Rsin γ).
5. The method of claim 4, wherein the current row tracking system enters an inverse tracking mode and calculating a target inverse tracking angle of the current row tracking system comprises: Calculating the highest point coordinate (X h ,z h ) when the current row tracking system just does not generate shadow shielding for the following row tracking system according to an incident ray formula Z (X) =tanα [ X- (X 1 +Rcosγ)]+(z 1 -Rsin gamma) and a rotatable curve range (X-X 0 ) 2 +(Z-z 0 ) 2 =R 2 ) taking (X 0 ,z 0 ) as a round point of the current row tracking system; The target inverse tracking angle angle= arccos [ (x 0 -x h )/R ] of the current row tracking system is calculated according to the new coordinates (x h ,z h ) of the highest point.
6. The inverse tracking method applied to a photovoltaic tracking system array of claim 1, further comprising: S4, judging whether the angle difference between the target inverse tracking angle of the current row tracking system and the inclination angle gamma of the subsequent row tracking system exceeds a preset angle difference threshold value, and if so, performing angle correction on the current row tracking system, wherein the angle correction specifically comprises the following steps: And (3) carrying out increment/decrement on the tracking system angle by using a preset step value, and simultaneously using the decremented/increment angle value as input to judge whether the angle difference between the inverse tracking angle of the current row of tracking systems and the inclination angle gamma of the subsequent row of tracking systems is within a preset angle difference threshold value, if the angle difference is beyond the preset angle difference threshold value, continuing stepping, and if the angle difference is within the preset angle difference threshold value, the inverse tracking angle is the optimal inverse tracking angle, and ending the stepping.
7. The method of inverse tracking for use in an array of photovoltaic tracking systems of claim 6, further comprising: S2-S4 is recursively executed by taking the adjacent previous row of tracking systems of the current row of tracking systems as new current row of tracking systems until the calculation of the optimal inverse tracking angle of the last row of tracking systems in the photovoltaic tracking system array is completed; and controlling all the photovoltaic tracking systems to rotate to the corresponding optimal inverse tracking angles.
8. The utility model provides a be applied to reverse tracking device of photovoltaic tracking system array, its characterized in that, photovoltaic tracking system array includes a plurality of photovoltaic tracking system that are row interval setting in east-west direction, and every photovoltaic tracking system is north-south extension setting, including photovoltaic tracking support and install photovoltaic module on the photovoltaic tracking support, define among the photovoltaic tracking system array tracking system relatively near the sun is preceding row tracking system, and tracking system relatively far away from the sun is back row tracking system, the device includes: the operation parameter acquisition unit is used for acquiring the center point coordinates of each photovoltaic tracking system in the photovoltaic tracking system array, the length 2R of the photovoltaic module, the light incidence angle alpha at the current moment and the initial tracking angle beta of the photovoltaic tracking system at the moment; The first calculation unit is used for calculating the coordinate of the highest point of the current row of tracking systems at the moment to be (x 0 -Rcosβ,z 0 + Rsin beta) based on the coordinate of the central point of the current row of tracking systems to be (x 0 ,z 0 ) and the initial tracking angle beta; the second calculation unit is used for calculating the lowest point coordinate of the photovoltaic component of the tracking system of the next row at the moment to be (x 1 +Rcosγ,z 1 -Rsin gamma) based on the coordinate of the central point of the tracking system of the next row to be (x 1 ,z 1 ) and the inclination angle gamma of the tracking system of the next row; A third calculation unit, configured to calculate an incident light ray formula at the moment based on (x 1 +Rcosγ,z 1 -Rsin γ) and the light ray incident angle α of the lowest point coordinate of the photovoltaic module of the tracking system of the next row, and calculate, according to the incident light ray formula, a critical position height when the tracking system of the current row does not generate shadow shielding for the tracking system of the next row at the moment ; An inverse tracking unit for determining the critical position height Compared with the highest point height z 0 + Rsin beta of the current row tracking system, if If not less than z 0 + Rsin β, indicating that the following row of tracking systems is in a non-shielding state, and enabling the current row of tracking systems to enter a normal tracking mode if the following row of tracking systems is in a normal tracking mode And < z h > represents that shadow shielding exists in the tracking system of the next row, the tracking system of the current row enters an inverse tracking mode, and the target inverse tracking angle of the tracking system of the current row is calculated.
9. The inverse tracking device according to claim 8, wherein the third calculation unit calculates an incident ray formula Z (X) =tanα [ X- (X 1 +Rcosγ)]+(z 1 -Rsin γ) at the lowest point of the photovoltaic modules of the following row of tracking systems based on the lowest point coordinates (X 1 +Rcosγ,z 1 -Rsin γ) of the photovoltaic modules of the following row of tracking systems and the ray incidence angle α.
10. A computer readable storage medium, characterized in that the computer readable storage medium stores a computer program comprising program instructions which, when executed by a processor, cause the processor or the calculator to perform the method according to any one of claims 1-7.

Description

Inverse tracking method and device applied to photovoltaic tracking system array and storage medium Technical Field The invention relates to the technical field of photovoltaics, in particular to a reverse tracking method, a device and a storage medium applied to a photovoltaic tracking system array. Background At present, in the process of rising in the morning and falling in the evening, a front-row tracking system can shield a photovoltaic module of a rear-row tracking system, so that the generated energy of the rear-row photovoltaic tracking system is suddenly reduced. The existing photovoltaic tracking system generally adopts an inverse tracking algorithm, and the inclination angle of the back-row tracking system is adjusted so as to prevent the photovoltaic component of the back-row tracking system from being blocked by the front-row tracking system. However, the existing inverse tracking algorithm is a two-dimensional inverse tracking method, and when the system enters inverse tracking control, the system controls all photovoltaic tracking systems to adopt the same inclination angle according to the pre-set parameters so as to solve the shadow shielding problem. The method ignores factors such as height difference of actual terrain, actual uneven component spacing, difference of inclination angles of adjacent photovoltaic tracking systems and the like, so that the inverse tracking methods still have obvious shadow loss during actual operation, and therefore the lifting effect of the inverse tracking power generation amount is limited. Disclosure of Invention One of the purposes of the embodiment of the invention is to provide a reverse tracking method, a device and a computer-readable storage medium applied to a photovoltaic tracking system array, and a 3D reverse tracking method for obtaining a target reverse tracking angle of each photovoltaic tracking system based on three-dimensional topography and illumination analysis, aiming at the problems that the existing photovoltaic reverse tracking method still has significant shadow loss under the condition of undulating topography and the power generation capacity is limited. In order to solve the technical problem, in a first aspect, an embodiment of the present invention provides an inverse tracking method applied to a photovoltaic tracking system array, where the photovoltaic tracking system array includes a plurality of photovoltaic tracking systems arranged at intervals in the east-west direction, each of the photovoltaic tracking systems is arranged in a north-south extending manner, and includes a photovoltaic tracking bracket and a photovoltaic module mounted on the photovoltaic tracking bracket, and a tracking system relatively close to the sun in the photovoltaic tracking system array is defined as a front tracking system, and a tracking system relatively far from the sun is defined as a rear tracking system, and the method includes: s1, acquiring a center point coordinate and a photovoltaic module length 2R of each photovoltaic tracking system in a photovoltaic tracking system array, a light incident angle alpha at the current moment and an initial tracking angle beta of the photovoltaic tracking system at the moment; S2, calculating the coordinate of the highest point of the current row of tracking system at the moment to be (x 0-Rcosβ,z0 + Rsin beta) based on the coordinate of the central point of the current row of tracking system to be (x 0,z0) and the initial tracking angle beta, and calculating the coordinate of the lowest point of the photovoltaic component of the subsequent row of tracking system at the moment to be (x 1+Rcosγ,z1 -Rsin gamma) based on the coordinate of the central point of the subsequent row of tracking system to be (x 1,z1) and the inclination angle gamma of the subsequent row of tracking system; Based on the lowest point coordinate of the photovoltaic component of the next row of tracking systems (x 1+Rcosγ,z1 -Rsin gamma) and the light incidence angle alpha, calculating an incident light ray formula at the moment, and calculating the critical position height when the current row of tracking systems do not generate shadow shielding on the next row of tracking systems at the moment according to the incident light ray formula ; S3, the critical position heightCompared with the highest point height z 0 + Rsin beta of the current row tracking system, ifIf not less than z 0 + Rsin β, indicating that the following row of tracking systems is in a non-shielding state, and enabling the current row of tracking systems to enter a normal tracking mode if the following row of tracking systems is in a normal tracking modeAnd < z h > represents that shadow shielding exists in the tracking system of the next row, the tracking system of the current row enters an inverse tracking mode, and the target inverse tracking angle of the tracking system of the current row is calculated. Further, in the technical solution provided by the emb