CN109164834A - A kind of automatic correcting method and system of photovoltaic tracking system error - Google Patents
A kind of automatic correcting method and system of photovoltaic tracking system error Download PDFInfo
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Abstract
The invention discloses a kind of automatic correcting methods of photovoltaic tracking system error: S1, executing S2 when photovoltaic tracking system is in the working time, does not carry out data check operation in current date；S2, the initial angle θ for obtaining runner assembly in photovoltaic tracking system0, driving motor rotates forward t1After time, the first Hall umber of pulse N is recorded1, first angle θ1, then driving motor rotates backward t2After time, the second Hall umber of pulse N is recorded2, second angle θ2；S3, proportionality coefficient P is calculated1And P2；S4, by aforementioned proportion FACTOR P1And P2It is stored as checkout coefficient, and marks and data check operation is completed in current date；S5, the rotation of control motor and adjustment direction of motor rotation in system operation.It is to carry out parameter correction to motor that the present invention has just started in daily photovoltaic tracking system, efficient and convenient, ensure that the accuracy and validity of motor data acquisition, improves the long-term reliability of motor and the precision of photovoltaic tracking system, increase benefit.
Description
Technical field
The present invention relates to photovoltaic plant tracking system technical field more particularly to a kind of self-correctings of photovoltaic tracking system error
Correction method and system.
Background technique
Traditional photovoltaic plant receives solar radiation using fixed bracket, photovoltaic array with fixed angle, causes photovoltaic sharp
With the decline of efficiency.With the application of tracking system technology, the income of photovoltaic plant is greatly improved.Traditional tracking
System is essentially all that transmission is realized using screw putter, and since running part needs load-bearing, abrasion and consumption are very big.It uses
In the process, it is easy to appear the problems such as system is unstable, tracking precision is not high, causes the increase of later maintenance cost, power station
The promotion of generated energy is also limited.Due to the long-term operation of tracking system, there are mechanical wears for rotary electric machine, cause rotational angle
Deviation.The time of 5 degree of rotation is 10s when motor starts to put into operation, and the time of 5 degree of rotation becomes 12s after long-play.Such as
Fruit rotates that identical time angular error is big, and causing photovoltaic array current angular not is most preferably to enter without time adjustment
Firing angle.Repeatedly after rotation, accumulated error is become much larger, and causes the decline of power benefit.
Summary of the invention
Technical problems based on background technology, the invention proposes a kind of self-correcting of photovoltaic tracking system error pros
Method and system.
The automatic correcting method of photovoltaic tracking system error proposed by the present invention, comprising the following steps:
S1, judge whether present clock chip time is in the working time in photovoltaic tracking system, if so, the day before yesterday is worked as in interpretation
Whether data check operation is carried out in phase, if it is not, executing S2；
S2, the initial angle θ for obtaining runner assembly in photovoltaic tracking system0, driving motor rotates forward t1After time, note
Record the first Hall umber of pulse N1, first angle θ1, then driving motor rotates backward t2After time, the second Hall umber of pulse N is recorded2、
Second angle θ2；
S3, it is based on initial angle θ0, the first Hall umber of pulse N1, first angle θ1, the second Hall umber of pulse N2, second jiao
Spend θ2Calculate proportionality coefficient P1And P2；
S4, by aforementioned proportion FACTOR P1And P2It is stored as checkout coefficient, and marks and data are completed in current date
Verification operation；
S5, photovoltaic tracking system operation when, based on above-mentioned checkout coefficient calculate Hall umber of pulse, and combine photovoltaic tracking
The current angular of runner assembly and the control motor rotation of the comparison result of default optimized incidence and adjustment motor turn in system
Dynamic direction；
Wherein, t1、t2It is preset value.
Preferably, step S3 is specifically included:
Obtain initial angle θ0, the first Hall umber of pulse N1, first angle θ1, the second Hall umber of pulse N2, second angle θ2；
Ratio P is calculated according to following formula1, the formula are as follows:
P1=| θ1-θ0|/N1；
Ratio P is calculated according to following formula2, the formula are as follows:
P2=| θ2-θ1|/N2。
Preferably, in step S4, data check operation is completed in label current date and specifically includes:
1 is set by check mark position in current date.
Preferably, step S1 is specifically included:
Read present clock chip time in photovoltaic tracking system；
Judge whether the present clock chip time is in the working time, if so, reading check mark in current date
Position；
If check mark position is 1 in current date, S2 is executed.
Preferably, in step S2, t1It is 20 seconds, t2It is 20 seconds.
The self correcting system of photovoltaic tracking system error proposed by the present invention, comprising:
Preparation module is operated, for judging whether present clock chip time is in the working time in photovoltaic tracking system,
If so, whether data check operation has been carried out in interpretation current date, if it is not, starting data obtaining module；
Data obtaining module, for obtaining the initial angle θ of runner assembly in photovoltaic tracking system0, driving motor forward direction
Rotate t1After time, the first Hall umber of pulse N is recorded1, first angle θ1, then driving motor rotates backward t2After time, record the
Two Hall umber of pulse N2, second angle θ2；
Coefficients calculation block, for being based on initial angle θ0, the first Hall umber of pulse N1, first angle θ1, the second Hall arteries and veins
Rush number N2, second angle θ2Calculate proportionality coefficient P1And P2；
Demarcating module is operated, is used for aforementioned proportion FACTOR P1And P2It is stored as checkout coefficient, and marks and work as the day before yesterday
Data check operation is completed in phase；
Error correction module, for calculating Hall umber of pulse based on above-mentioned checkout coefficient in photovoltaic tracking system operation,
And combine the current angular of runner assembly and the control motor rotation of the comparison result of default optimized incidence in photovoltaic tracking system
And adjustment direction of motor rotation；
Wherein, t1、t2It is preset value.
Preferably, the coefficients calculation block is specifically used for:
Obtain initial angle θ0, the first Hall umber of pulse N1, first angle θ1, the second Hall umber of pulse N2, second angle θ2；
Ratio P is calculated according to following formula1, the formula are as follows:
P1=| θ1-θ0|/N1；
Ratio P is calculated according to following formula2, the formula are as follows:
P2=| θ2-θ1|/N2。
Preferably, in the operation demarcating module, data check operation is completed in label current date and specifically includes:
1 is set by check mark position in current date.
Preferably, the operation preparation module is specifically used for:
Read present clock chip time in photovoltaic tracking system；
Judge whether the present clock chip time is in the working time, if so, reading check mark in current date
Position；
If check mark position is 1 in current date, start data obtaining module.
Preferably, in the data obtaining module, t1It is 20 seconds, t2It is 20 seconds.
The automatic correcting method and system of photovoltaic tracking system error proposed by the present invention have just been opened in daily photovoltaic tracking system
Dynamic is that parameter correction is carried out to motor, not only efficient and convenient, but also ensure that the accuracy that motor is acquired in operation phase data
And validity.The present invention has saved cost without adding hardware cost, and the method increase motors reliably and with long-term
Property, avoid motor because caused by the increase of working time and the accumulation of working strength motor internal mechanical wear, to increase
The error of system acquisition, greatly increases the precision of photovoltaic tracking system, increases the problem of reducing the precision of collection result
Benefit.Specifically: the present invention records the initial angle of runner assembly first, then controls when carrying out parameter correction to motor
Motor rotates forward records rotational pulse number and current angular after a certain period of time, then controls motor reversal and record rotation after a certain period of time
Umber of pulse and current angular calculate ratio further according to an initial angle, two rotational pulse numbers and two current angulars
Coefficient regulates and controls electricity in conjunction with the current angular of proportionality coefficient, optimized incidence, runner assembly finally when photovoltaic system is run
Machine rotation and rotation direction, be corrected with the kinematic error to photovoltaic tracking system, guarantee system operation validity and
Accuracy improves running precision.
Detailed description of the invention
Fig. 1 is a kind of step schematic diagram of the automatic correcting method of photovoltaic tracking system error；
Fig. 2 is a kind of structural schematic diagram of the self correcting system of photovoltaic tracking system error；
Fig. 3 is the hardware block diagram in a kind of automatic correcting method of photovoltaic tracking system error and the embodiment of system；
Fig. 4 is the calculation flow chart in a kind of automatic correcting method of photovoltaic tracking system error and the embodiment of system.
Specific embodiment
As shown in Figs 1-4, Fig. 1-4 is a kind of automatic correcting method of photovoltaic tracking system error proposed by the present invention and is
System.
Referring to Fig.1, the automatic correcting method of photovoltaic tracking system error proposed by the present invention, comprising the following steps:
S1, judge whether present clock chip time is in the working time in photovoltaic tracking system, if so, the day before yesterday is worked as in interpretation
Whether data check operation is carried out in phase, if it is not, executing S2；
S2, the initial angle θ for obtaining runner assembly in photovoltaic tracking system0, driving motor rotates forward t1After time, note
Record the first Hall umber of pulse N1, first angle θ1, then driving motor rotates backward t2After time, the second Hall umber of pulse N is recorded2、
Second angle θ2；
S3, it is based on initial angle θ0, the first Hall umber of pulse N1, first angle θ1, the second Hall umber of pulse N2, second jiao
Spend θ2Calculate proportionality coefficient P1And P2；
In present embodiment, step S3 is specifically included:
Obtain initial angle θ0, the first Hall umber of pulse N1, first angle θ1, the second Hall umber of pulse N2, second angle θ2；
Ratio P is calculated according to following formula1, the formula are as follows:
P1=| θ1-θ0|/N1；
Ratio P is calculated according to following formula2, the formula are as follows:
P2=| θ2-θ1|/N2。
S4, by aforementioned proportion FACTOR P1And P2It is stored as checkout coefficient, and marks and data are completed in current date
Verification operation；
In in present embodiment, data check operation is completed in label current date and specifically includes:
1 is set by check mark position in current date.
Accordingly, step S1 is specifically included:
Read present clock chip time in photovoltaic tracking system；
Judge whether the present clock chip time is in the working time, if so, reading check mark in current date
Position；
If check mark position is 1 in current date, S2 is executed.
S5, photovoltaic tracking system operation when, based on above-mentioned checkout coefficient calculate Hall umber of pulse, and combine photovoltaic tracking
The current angular of runner assembly and the control motor rotation of the comparison result of default optimized incidence and adjustment motor turn in system
Dynamic direction；
Wherein, t1、t2It is preset value.
In a further embodiment, t1It is 20 seconds, t2It is 20 seconds.
Above-mentioned t1、t2It is set all in accordance with actual use environment and service condition, is transported with meeting different scenes to motor
The demand of row time, to improve the validity and accuracy of above-mentioned automatic correcting method comprehensively.
It is the self correcting system of photovoltaic tracking system error proposed by the present invention referring to Fig. 2, Fig. 2, comprising:
Preparation module is operated, for judging whether present clock chip time is in the working time in photovoltaic tracking system,
If so, whether data check operation has been carried out in interpretation current date, if it is not, starting data obtaining module；
Data obtaining module, for obtaining the initial angle θ of runner assembly in photovoltaic tracking system0, driving motor forward direction
Rotate t1After time, the first Hall umber of pulse N is recorded1, first angle θ1, then driving motor rotates backward t2After time, record the
Two Hall umber of pulse N2, second angle θ2；
Coefficients calculation block, for being based on initial angle θ0, the first Hall umber of pulse N1, first angle θ1, the second Hall arteries and veins
Rush number N2, second angle θ2Calculate proportionality coefficient P1And P2；
In present embodiment, the coefficients calculation block is specifically used for:
Obtain initial angle θ0, the first Hall umber of pulse N1, first angle θ1, the second Hall umber of pulse N2, second angle θ2；
Ratio P is calculated according to following formula1, the formula are as follows:
P1=| θ1-θ0|/N1；
Ratio P is calculated according to following formula2, the formula are as follows:
P2=| θ2-θ1|/N2。
Demarcating module is operated, is used for aforementioned proportion FACTOR P1And P2It is stored as checkout coefficient, and marks and work as the day before yesterday
Data check operation is completed in phase；
In present embodiment, data check operation is completed in label current date and specifically includes:
1 is set by check mark position in current date.
Accordingly, the operation preparation module is specifically used for:
Read present clock chip time in photovoltaic tracking system；
Judge whether the present clock chip time is in the working time, if so, reading check mark in current date
Position；
If check mark position is 1 in current date, start data obtaining module.
Error correction module, for calculating Hall umber of pulse based on above-mentioned checkout coefficient in photovoltaic tracking system operation,
And combine the current angular of runner assembly and the control motor rotation of the comparison result of default optimized incidence in photovoltaic tracking system
And adjustment direction of motor rotation；
Wherein, t1、t2It is preset value.
In a further embodiment, t1It is 20 seconds, t2It is 20 seconds.
Above-mentioned t1、t2It is set all in accordance with actual use environment and service condition, is transported with meeting different scenes to motor
The demand of row time, to improve the validity and accuracy of above-mentioned automatic correcting method comprehensively.
The automatic correcting method and system for the photovoltaic tracking system error that present embodiment proposes, in daily photovoltaic tracking system
Just starting is that parameter correction is carried out to motor, not only efficient and convenient, but also ensure that the essence that motor is acquired in operation phase data
True property and validity.The present invention has saved cost without adding hardware cost, and the method increase the long-term of motor can
By property, avoid motor because caused by the increase of working time and the accumulation of working strength motor internal mechanical wear, to increase
The error of adding system acquisition, the problem of reducing the precision of collection result, greatly increases the precision of photovoltaic tracking system, increases
Benefit.Specifically: present embodiment records the initial angle of runner assembly, so when carrying out parameter correction to motor first
Control motor rotates forward afterwards records rotational pulse number and current angular after a certain period of time, then controls motor reversal certain time postscript
Rotational pulse number and current angular are recorded, is counted further according to an initial angle, two rotational pulse numbers and two current angulars
Proportionality coefficient is calculated, finally when photovoltaic system is run, is come in conjunction with the current angular of proportionality coefficient, optimized incidence, runner assembly
Regulate and control motor rotation and rotation direction, be corrected with the kinematic error to photovoltaic tracking system, the operation of guarantee system has
Effect property and accuracy improve running precision.
For the operating condition for preferably illustrating present embodiment, it is illustrated below with reference to embodiment:
1, control motor rotates and reverse
Single-chip microcontroller reads real-time clock current time, judges whether current time is in the working time, if being, then judges
Whether today carried out data check.If it's not true, present orientation angle numerical value θ is read0, motor is controlled later to rotate forward
20s records Hall umber of pulse N1, read current angular θ1；Control motor rotates backward 20s later, records Hall umber of pulse N2,
Read current angular θ2。
2, data processing
Calculating ratio FACTOR P1、P2Value, P1=| θ1-θ0|/N1, P2=| θ2-θ1|/N2.By P1、P2It stores in single-chip microcontroller
Portion flash.After data processing is complete, setting check mark position is 1, indicates the data check that today is completed.System later
In operation, directly by proportionality coefficient P1、P2It brings into, calculates the Hall umber of pulse generated when motor rotates every time.
3, system is run
System obtains current time optimized incidence according to astronomical algorithm, then works as anterior angle by position sensor acquisition again
Angle value, judges whether current angular and optimized incidence difference are greater than setting value, the rotation of control motor and rotation direction.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
Anyone skilled in the art in the technical scope disclosed by the present invention, according to the technique and scheme of the present invention and its
Inventive concept is subject to equivalent substitution or change, should be covered by the protection scope of the present invention.
Claims (10)
1. a kind of automatic correcting method of photovoltaic tracking system error, which comprises the following steps:
S1, judge whether present clock chip time is in the working time in photovoltaic tracking system, if so, in interpretation current date
Whether data check operation has been carried out, if it is not, executing S2；
S2, the initial angle θ for obtaining runner assembly in photovoltaic tracking system0, driving motor rotates forward t1After time, record the
One Hall umber of pulse N1, first angle θ1, then driving motor rotates backward t2After time, the second Hall umber of pulse N is recorded2, second
Angle, θ2；
S3, it is based on initial angle θ0, the first Hall umber of pulse N1, first angle θ1, the second Hall umber of pulse N2, second angle θ2Meter
Calculate proportionality coefficient P1And P2；
S4, by aforementioned proportion FACTOR P1And P2It is stored as checkout coefficient, and marks and data check is completed in current date
Operation；
S5, photovoltaic tracking system operation when, based on above-mentioned checkout coefficient calculate Hall umber of pulse, and combine photovoltaic tracking system
The current angular of middle runner assembly and the control motor rotation of the comparison result of default optimized incidence and adjustment motor rotation side
To；
Wherein, t1、t2It is preset value.
2. the automatic correcting method of photovoltaic tracking system error according to claim 1, which is characterized in that step S3 is specifically wrapped
It includes:
Obtain initial angle θ0, the first Hall umber of pulse N1, first angle θ1, the second Hall umber of pulse N2, second angle θ2；
Ratio P is calculated according to following formula1, the formula are as follows:
P1=| θ1-θ0|/N1；
Ratio P is calculated according to following formula2, the formula are as follows:
P2=| θ2-θ1|/N2。
3. the automatic correcting method of photovoltaic tracking system error according to claim 1, which is characterized in that in step S4, mark
Data check operation is completed in note current date to specifically include:
1 is set by check mark position in current date.
4. the automatic correcting method of photovoltaic tracking system error according to claim 3, which is characterized in that step S1 is specifically wrapped
It includes:
Read present clock chip time in photovoltaic tracking system；
Judge whether the present clock chip time is in the working time, if so, reading check mark position in current date；
If check mark position is 1 in current date, S2 is executed.
5. the automatic correcting method of photovoltaic tracking system error according to claim 1, which is characterized in that in step S2, t1For
20 seconds, t2It is 20 seconds.
6. a kind of self correcting system of photovoltaic tracking system error characterized by comprising
Preparation module is operated, for judging whether present clock chip time is in the working time in photovoltaic tracking system, if so,
Whether data check operation is carried out in interpretation current date, if it is not, starting data obtaining module；
Data obtaining module, for obtaining the initial angle θ of runner assembly in photovoltaic tracking system0, driving motor rotates forward t1
After time, the first Hall umber of pulse N is recorded1, first angle θ1, then driving motor rotates backward t2After time, the second Hall is recorded
Umber of pulse N2, second angle θ2；
Coefficients calculation block, for being based on initial angle θ0, the first Hall umber of pulse N1, first angle θ1, the second Hall umber of pulse
N2, second angle θ2Calculate proportionality coefficient P1And P2；
Demarcating module is operated, is used for aforementioned proportion FACTOR P1And P2It is stored, and is marked in current date as checkout coefficient
Data check operation is completed；
Error correction module, for calculating Hall umber of pulse based on above-mentioned checkout coefficient, and tie in photovoltaic tracking system operation
Close photovoltaic tracking system in runner assembly current angular and default optimized incidence comparison result control motor rotation and
Adjust direction of motor rotation；
Wherein, t1、t2It is preset value.
7. the self correcting system of photovoltaic tracking system error according to claim 6, which is characterized in that the coefficient calculates
Module is specifically used for:
Obtain initial angle θ0, the first Hall umber of pulse N1, first angle θ1, the second Hall umber of pulse N2, second angle θ2；
Ratio P is calculated according to following formula1, the formula are as follows:
P1=| θ1-θ0|/N1；
Ratio P is calculated according to following formula2, the formula are as follows:
P2=| θ2-θ1|/N2。
8. the self correcting system of photovoltaic tracking system error according to claim 6, which is characterized in that the operation calibration
In module, data check operation is completed in label current date and specifically includes:
1 is set by check mark position in current date.
9. the self correcting system of photovoltaic tracking system error according to claim 8, which is characterized in that the operation prepares
Module is specifically used for:
Read present clock chip time in photovoltaic tracking system；
Judge whether the present clock chip time is in the working time, if so, reading check mark position in current date；
If check mark position is 1 in current date, start data obtaining module.
10. the self correcting system of photovoltaic tracking system error according to claim 6, which is characterized in that the information obtains
In modulus block, t1It is 20 seconds, t2It is 20 seconds.
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