CN204068861U - A kind of system of calibrating photovoltaic controller - Google Patents
A kind of system of calibrating photovoltaic controller Download PDFInfo
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- CN204068861U CN204068861U CN201420514021.0U CN201420514021U CN204068861U CN 204068861 U CN204068861 U CN 204068861U CN 201420514021 U CN201420514021 U CN 201420514021U CN 204068861 U CN204068861 U CN 204068861U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The utility model provides a kind of system of calibrating photovoltaic controller, comprises at least one in three kinds of annexations; The first annexation: comprise DC power supply, transducer and controller; Controller is communicated with photovoltaic controller by transducer; DC power supply is communicated with photovoltaic controller; The second annexation: comprise DC power supply, transducer, controller and accessory power supply; Controller is communicated with photovoltaic controller by transducer; Accessory power supply is communicated with photovoltaic controller; DC power supply is communicated with photovoltaic controller; The third annexation: comprise DC power supply, transducer, controller and load; Controller is communicated with photovoltaic controller by transducer; Load is communicated with photovoltaic controller; DC power supply is communicated with photovoltaic controller.The system of the utility model calibration photovoltaic controller has the following advantages: overall structure is simplified, and can realize the calibration of at least one in battery tension, photovoltaic voltage and photovoltaic charged electric current, and calibration speed is fast, accuracy is high.
Description
Technical field
The utility model relates to photovoltaic power generating system device field, especially, relates to a kind of system of calibrating photovoltaic controller.
Background technology
Photovoltaic controller is the key equipment in photovoltaic generating system, has and apply very widely in wind and light complementary road lamp, solar street light, solar energy garden lamp, new rural village street lamp.Especially, new rural village street lamp is because quantity is large, particularly responsive to cost control, so just require that photovoltaic controller had both had feature that is powerful, excellent performance, require low price again, for this reason, photovoltaic controller generally adopts the method for secondary calibration to solve the measurement problem of battery tension, photovoltaic voltage, photovoltaic charged electric current and load current.
Existingly in laboratory, the method that photovoltaic controller is calibrated to be specially: when doing a certain calibration, wiring is carried out according to the simplest technical requirement, to send instructions read data with serial ports assistant, new coefficient and new zero point is obtained by people's simple computation, send instructions amendment coefficient and zero point with serial ports assistant again, realize calibration like this.After finishing this calibration, then rewiring, do another calibration.This calibrating mode, time-consuming many, accuracy is low.
Therefore, design a kind of structure simplify and can realize fast, the photovoltaic controller calibration system of accurate calibration is extremely important.
Utility model content
The utility model object be to provide a kind of structure to simplify and can realize fast, the system of the calibration photovoltaic controller of accurate calibration, concrete technical scheme is as follows:
Calibrate a system for photovoltaic controller, comprise at least one in three kinds of annexations;
The first annexation: described system comprises DC power supply, transducer and controller; Described controller is by the RS485 orifice of transducer and photovoltaic controller; Described DC power supply is communicated with the storage battery port of photovoltaic controller by the first control switch; Diode is provided with between described DC power supply and described first control switch;
The second annexation: described system comprises DC power supply, transducer, controller and accessory power supply; Described controller is by the RS485 orifice of transducer and photovoltaic controller; Described accessory power supply is communicated with the storage battery port of photovoltaic controller by the second control switch, and is provided with diode between described accessory power supply and described second control switch; Described DC power supply is communicated with the photovoltaic port of photovoltaic controller by the 3rd control switch;
The third annexation: described system comprises DC power supply, transducer, controller and load; Described controller is by the RS485 orifice of transducer and photovoltaic controller; Described load is communicated with the storage battery port of photovoltaic controller; Described DC power supply is communicated with the photovoltaic port of photovoltaic controller by the 3rd control switch.
Preferred in above technical scheme, described system also comprises ammeter and light source, and described light source is communicated with the load port of photovoltaic controller by ammeter.
Preferred in above technical scheme, described light source is LED.
Preferred in above technical scheme, described controller is programmable logic controller (PLC) or electronic computer.
Preferred in above technical scheme, described transducer is that RS485 turns the transducer of USB, the transducer of RS485 RS 232, RS485 turn RJ45 transducer or RS485 turn radio switch.
Preferred in above technical scheme, described DC power supply is programmable power supply; Described load is electronic load.
The utility model has following beneficial effect:
(1) system of calibration photovoltaic controller of the present utility model, comprises at least one in three kinds of annexations, and the first annexation is specially: described system comprises DC power supply, transducer and controller; The second annexation is specially: described system comprises DC power supply, transducer, controller and accessory power supply; The third annexation is specially: described system comprises DC power supply, transducer, controller and load, and overall structure is simplified; The first annexation realizes the calibration of battery tension, the second annexation can realize the calibration of photovoltaic voltage, the third annexation can realize the calibration of photovoltaic charged electric current, adopt said system can realize the calibration of at least one in the battery tension of photovoltaic controller, photovoltaic voltage and photovoltaic charged electric current, calibration speed is fast, precision is high, improve the precision of photovoltaic controller, practical.
(2) in the utility model, system also comprises ammeter and light source, can realize the calibration of load current, improves the precision of photovoltaic controller further, practical.
(3) in the utility model, light source adopts LED, can also be the parts of resistance etc., and the scope of application is wide, practical.
(4) controller described in this practicality adopts programmable logic controller (PLC) or electronic computer, can carry out according to demand programming or not programming, realize controller to the management of calibration process and control, practical.
(5) in the utility model, transducer adopts RS485 to turn the transducer of USB or the transducer of RS485 RS 232 or RS485 to turn the transducer of RJ45 or RS485 turns radio switch, the conversion between multiple interfaces can be realized, practical, and realize instruction accurate, transmit fast, improve further precision and the efficiency of calibration.
(6) DC power supply described in the utility model adopts programmable power supply, and described load adopts electronic load, has multi-functional and high-precision feature, simplifies system configuration, improve calibration speed.
Except object described above, feature and advantage, the utility model also has other object, feature and advantage.Below with reference to figure, the utility model is described in further detail.
Accompanying drawing explanation
The accompanying drawing forming a application's part is used to provide further understanding of the present utility model, and schematic description and description of the present utility model, for explaining the utility model, is not formed improper restriction of the present utility model.In the accompanying drawings:
Fig. 1 is the structural representation of the system of the utility model preferred embodiment 1 alignment photovoltaic controller;
Fig. 2 is the structural representation of the system of the utility model preferred embodiment 2 alignment photovoltaic controller;
Fig. 3 is the structural representation of the system of the utility model preferred embodiment 3 alignment photovoltaic controller;
Fig. 4 is the structural representation of the system of the utility model preferred embodiment 4 alignment photovoltaic controller;
11-DC power supply, 12-transducer, 13-controller, 14-first control switch, 15-diode, 16-accessory power supply, 17-second control switch, 18-the 3rd control switch, 19-load, 20-photovoltaic controller, 21-ammeter, 22-light source.
Embodiment
Below in conjunction with accompanying drawing, embodiment of the present utility model is described in detail, but the multitude of different ways that the utility model can limit according to claim and cover is implemented.
Embodiment 1:
Calibrating a system for photovoltaic controller, for calibrating the battery tension of photovoltaic controller, referring to Fig. 1, specifically comprise DC power supply 11, transducer 12 and controller 13, structure is simplified.
Described controller 13 is by the RS485 orifice of transducer 12 with photovoltaic controller 20.
The port of export of described DC power supply 11 is communicated with the storage battery port of photovoltaic controller 20 by the first control switch 14.
Be provided with diode 15 between described DC power supply 11 and described first control switch 14, the effect of described diode 15 is the described DC power supply 13 of protection, can not be damaged because electric current pours in down a chimney; Described DC power supply 11 act as imitated storage battery, multi-functional, the high-precision programmable power supply of preferential employing, the IT6512 power supply of such as Ai Dekesi, its advantage is that precision is high, function is many and strong, simple to operate, can arrange voltage and current, can show and voltage is set and electric current is set, virtual voltage, actual current and actual power can also be shown.
Described first control switch 14 preferentially adopts economical and practical regular tap, and it switches on and off and is operated by people, solves the problem of repetition wiring like this by a kind of scheme of relatively economical.Described first control switch can also be designed to be connected with described controller 13, realizes Automated condtrol, and it is convenient, practical to control.
Described controller 13 preferentially adopts electronic computer, and electronic computer is cheap, SDK (Software Development Kit) and language numerous, popularization degree is high, only needs simple training just can on dutyly to use; After being deployed with calibration procedure, calibration steps can be completed by it; Also can adopt programmable logic controller (PLC), correspondingly program can be edited, realize controller to the management of calibration process and control, practical.
Described transducer 12 adopts RS485 to turn the transducer of USB or the transducer of RS485 RS 232 or RS485 to turn the transducer of RJ45 or RS485 turns radio switch, the conversion between multiple interfaces can be realized, applicability is wide, and can realize instruction accurate, transmit fast, further improve the precision controlled and efficiency.
Battery tension calibration has two calibration points, and the setting principle of two calibration points is as follows: the battery tension excursion generally allowed at storage battery is U
minimum~ U
maximum, advise slightly larger than U
minimum(preferably U in the scope of magnitude of voltage
minimum+ 0.01V ~ U
minimum+ 0.5V) to get a magnitude of voltage be the first calibration point, is being slightly less than U
maximum(preferably U in the scope of magnitude of voltage
maximum-0.5V ~ U
maximum-0.01V) to get a magnitude of voltage be the second calibration point.The system of the present embodiment calibration photovoltaic controller is adopted to be specially the job step that it is calibrated:
The first step: before calibration, the battery tension initial coefficients of photovoltaic controller 20 is K
0, its initial zero is Z
0; Closed first control switch 14;
Second step: arranging DC power supply 11 output voltage is the first calibration point voltage V (1)
i, then gather the battery tension reading V (1) of the photovoltaic controller 20 of this calibration point
0; Arranging DC power supply 11 output voltage is again the second calibration point voltage V (2)
i, then gather the battery tension reading V (2) of the photovoltaic controller 20 of this calibration point
0;
3rd step: controller 13 calculates battery tension error delta E1 and the △ E2 of the first calibration point and the second calibration point, wherein △ E1=V (1)
0-V (1)
i, △ E2=V (2)
0-V (2)
i; Judge whether the absolute value of △ E1 or △ E2 is greater than 0.2;
If not, calibration terminates; If so, the 4th step is continued;
4th step: the coefficient of setting battery tension is K
n, its zero point is Z
n, meet following formula respectively:
K
n＝K
0(V
H-V
L)/(V(2)
0-V(1)
0)；
Z
n＝[V
H(V(1)
0-Z
0)-V
L(V(2)
0-Z
0)]/(V(2)
0-V(1)
0)；
Wherein: K
n, Z
nthe battery tension coefficient after calibration and zero point respectively, i.e. new coefficient and new zero point; K
0, Z
0battery tension initial coefficients and initial zero respectively; V
h, V
lthe battery tension standard value of the second calibration point, the first calibration point respectively; V (1)
0, V (2)
0the battery tension reading of the first calibration point, the second calibration point photovoltaic controller respectively;
5th step: return second step.
Generally carry out primary calibration.If need in actual demand to repeat repeatedly to calibrate, can directly return second step from the 4th step and repeat calibration, until reach requirement according to identical mode.
Adopt the battery tension of system of the present utility model to photovoltaic controller to calibrate, do not need rewiring repeatedly, time-consuming few, calibration speed is fast; And be not use serial ports assistant, but adopting controller to calibrate, accuracy is high and calibration speed fast, practical.
Embodiment 2:
Calibrating a system for photovoltaic controller, for calibrating the photovoltaic voltage of photovoltaic controller, referring to Fig. 2, specifically comprise DC power supply 11, transducer 12, controller 13 and accessory power supply 16, overall structure is simplified.
Described controller 13 is by the RS485 orifice of transducer 12 with photovoltaic controller 20.
Described accessory power supply 16 is communicated with the storage battery port of photovoltaic controller 20 by the second control switch 17, and is provided with diode 15 between described accessory power supply 16 and described second control switch 17.
The output of described DC power supply 11 is communicated with the photovoltaic port of photovoltaic controller 20 by the 3rd control switch 18, described DC power supply 11 act as analog solar plate, multi-functional, the high-precision programmable power supply of preferential employing, the IT6512 power supply of such as Ai Dekesi, its advantage is that precision is high, and function is many and strong, simple to operate, can voltage and current be set, can shows and voltage is set and electric current is set, virtual voltage, actual current and actual power can also be shown.
The effect of described diode 15 is the described accessory power supplys 16 of protection, can not be damaged because electric current pours in down a chimney.
Described accessory power supply 16 act as imitated storage battery, for being supplied to the working power of photovoltaic controller when photovoltaic voltage is calibrated, require relatively lower, therefore adopt economic cheap conventional DC power supply, only need can arrange voltage and current just, less demanding to precision etc.
Described second control switch 17 and the 3rd control switch 18 preferentially adopt economical and practical regular tap, and it switches on and off and is operated by people, solves the problem of repetition wiring like this by a kind of scheme of relatively economical.Described second control switch and the 3rd control switch can also be designed to all be connected with described controller 13, realize Automated condtrol, and it is convenient, practical to control.
Described controller 13 preferentially adopts electronic computer, and electronic computer is cheap, SDK (Software Development Kit) and language numerous, popularization degree is high, only needs simple training just can on dutyly to use.Be deployed with calibration procedure, following job step can have been come by it; Also can adopt programmable logic controller (PLC), correspondingly program can be edited, realize controller to the management of calibration process and control, practical.
Described transducer 12 adopts RS485 to turn the transducer of USB or the transducer of RS485 RS 232 or RS485 to turn the transducer of RJ45 or RS485 turns radio switch, the conversion between multiple interfaces can be realized, applicability is strong, and realize instruction accurate, transmit fast, further improve the precision controlled and efficiency.
When adopting the system calibration photovoltaic voltage of the calibration photovoltaic controller of the present embodiment, photovoltaic voltage calibration has two calibration points, and the setting principle of two calibration points is as follows: general is U in solar panels output voltage excursion
minimum~ U
maximum, advise slightly larger than U
minimum(preferably U in the scope of magnitude of voltage
minimum+ 0.01V ~ U
minimum+ 0.5V) to get a magnitude of voltage be the first calibration point, is being slightly less than U
maximum(preferably U in the scope of magnitude of voltage
maximum-0.5V ~ U
maximum-0.05V) to get a magnitude of voltage be the second calibration point, concrete calibration steps is as follows:
The first step: before calibration, the photovoltaic voltage initial coefficients of photovoltaic controller 20 is K
0, its initial zero is Z
0; Closed second control switch 17 and the 3rd control switch 18;
Second step: arranging DC power supply 11 output voltage is the first calibration point voltage V (1)
i, then gather the photovoltaic voltage reading V (1) of the photovoltaic controller 20 of this calibration point
0; Arranging DC power supply 11 output voltage is again the second calibration point voltage V (2)
i, then gather the photovoltaic voltage reading V (2) of the photovoltaic controller 20 of this calibration point
0;
3rd step: controller 13 calculates photovoltaic voltage error delta E1 and the △ E2 of the first calibration point and the second calibration point, wherein △ E1=V (1)
0-V (1)
i, △ E2=V (2)
0-V (2)
i; Judge whether the absolute value of △ E1 or △ E2 is greater than 0.2;
If not, calibration terminates; If so, the 4th step is continued;
4th step: the coefficient resetting photovoltaic voltage is K
n, its zero point is Z
n, meet following formula respectively:
K
n＝K
0(V
H-V
L)/(V(2)
0-V(1)
0)；
Z
n＝[V
H(V(1)
0-Z
0)-V
L(V(2)
0-Z
0)]/(V(2)
0-V(1)
0)；
Wherein: K
n, Z
nthe photovoltaic voltage coefficient after calibration and zero point respectively, i.e. new coefficient and new zero point; K
0, Z
0photovoltaic voltage initial coefficients and initial zero respectively; V
h, V
lthe photovoltaic voltage standard value of the second calibration point, the first calibration point respectively; V (1)
0, V (2)
0the photovoltaic voltage reading of the first calibration point, the second calibration point photovoltaic controller respectively;
5th step: return second step.
Generally carry out primary calibration.If need in actual demand to repeat repeatedly to calibrate, can directly return second step from the 4th step and repeat calibration, until reach requirement according to identical mode.
Adopt the photovoltaic voltage of system of the present utility model to photovoltaic controller 20 to calibrate, do not need rewiring repeatedly, time-consuming few, calibration speed is fast; And be not use serial ports assistant, but adopting controller to calibrate, accuracy is high and calibration speed fast, practical.
Embodiment 3:
Calibrating a system for photovoltaic controller, for calibrating the photovoltaic charged electric current of photovoltaic controller, referring to Fig. 3, specifically comprise DC power supply 11, transducer 12, controller 13 and load 19, overall structure is simplified.
Described controller 13 is by the RS485 orifice of transducer 12 with photovoltaic controller 20.
Described load 19 is communicated with the storage battery port of photovoltaic controller 20.
Described DC power supply 11 is communicated with the photovoltaic port of photovoltaic controller 20 by the 3rd control switch 18.
Described DC power supply 11 act as analog solar plate, preferably adopt multi-functional, high-precision programmable power supply, the IT6512 power supply of such as Ai Dekesi; Described load 19 act as imitated storage battery, preferential adopt multi-functional, high-precision electronic load, the IT8514B electronic load of such as Ai Dekesi.Programmable power supply and electronic load all have the high and advantage that function is many of precision, simple to operate, polytype loads such as constant-resistance type, constant-current type, constant-pressure type, invariable power type can be simulated, settings can be shown, virtual voltage, actual current and actual power can also be shown.
Described 3rd control switch 18 preferentially adopts economical and practical regular tap, and it switches on and off and is operated by people, solves the problem of repetition wiring like this by a kind of scheme of relatively economical.Described first control switch can also be designed to all be connected with described controller 13, realizes Automated condtrol, and it is convenient, practical to control.
Described controller 13 preferentially adopts electronic computer, and electronic computer is cheap, SDK (Software Development Kit) and language numerous, popularization degree is high, only needs simple training just can on dutyly to use.Be deployed with calibration procedure, following job step can have been come by it; Also can adopt programmable logic controller (PLC), correspondingly program can be edited, realize controller to the management of calibration process and control, practical.
Described transducer 12 adopts RS485 to turn the transducer of USB or the transducer of RS485 RS 232 or RS485 to turn the transducer of RJ45 or RS485 turns radio switch, the conversion between multiple interfaces can be realized, realize instruction accurate, transmit fast, improve control precision and efficiency.
When adopting the system of the calibration photovoltaic controller of the present embodiment to carry out photovoltaic charged correcting current, have two calibration points, the setting principle of two calibration points is as follows: the photovoltaic charged electric current generally allowed at photovoltaic controller is I
minimum~ I
maximum(I
minimumvalue can be 0), advise being greater than I
minimum(preferably I near current value
minimum+ 0.01A ~ I
minimum+ 0.5A) to get a charging current be the first calibration point, is being slightly less than I
maximum(preferably I in the scope of current value
maximum-0.5A ~ I
maximum-0.01A) to get a charging current be the second calibration point, concrete calibration steps is as follows:
The first step: before calibration, the photovoltaic electric current initial coefficients of photovoltaic controller 20 is K
0, its initial zero is Z
0; Closed 3rd control switch 18;
Second step: electronic load 19 is set for constant current mode and electric current is the first calibration point electric current I (1)
i, then gather the photovoltaic current indication I (1) of the photovoltaic controller 20 of this calibration point
0; Arranging electronic load 19 electric current is again the second calibration point electric current I (2)
i, then gather the photovoltaic current indication I (2) of the photovoltaic controller 20 of this calibration point
0;
3rd step: controller 13 calculates photovoltaic electric stream error △ E1 and the △ E2 of the first calibration point and the second calibration point, wherein △ E1=I (1)
0-I (1)
i, judge whether the absolute value of △ E1 is greater than 0.05, △ E2=[I (2)
0-I (2)
i] × 100%/I (2)
i, judge whether the absolute value of △ E2 is greater than 3%;
If not, calibration terminates; If so, the 4th step is continued;
4th step: the coefficient resetting photovoltaic electric current is K
n, its zero point is Z
n, meet following formula respectively:
K
n＝K
0(I
H-I
L)/(I(2)
0-I(1)
0)；
Z
n＝[I
H(I(1)
0-Z
0)-I
L(I(2)
0-Z
0)]/(I(2)
0-I(1)
0)；
Wherein: K
n, Z
nthe photovoltaic current coefficient after calibration and zero point respectively, i.e. new coefficient and new zero point; K
0, Z
0photovoltaic electric current initial coefficients and initial zero respectively; I
h, I
lthe photovoltaic electric flow standard value of the second calibration point, the first calibration point respectively; I (1)
0, I (2)
0the photovoltaic current indication of the first calibration point, the second calibration point photovoltaic controller respectively;
5th step: return second step.
Generally carry out primary calibration.If need in actual demand to repeat repeatedly to calibrate, can directly return second step from the 4th step and repeat calibration, until reach requirement according to identical mode.
Adopt the photovoltaic charged electric current of system of the present utility model to photovoltaic controller 20 to calibrate, do not need rewiring repeatedly, time-consuming few, calibration speed is fast; And be not use serial ports assistant, but adopting controller to calibrate, accuracy is high and calibration speed fast, practical.
Embodiment 4:
A kind of system of calibrating photovoltaic controller, for calibrating the battery tension of photovoltaic controller, photovoltaic voltage, photovoltaic charged electric current and load current simultaneously, refer to Fig. 4, specifically comprise DC power supply 11, transducer 12, controller 13, accessory power supply 16, load 19, ammeter 21 and light source 22.
The port of export of described DC power supply 11 is communicated with the storage battery port of photovoltaic controller 20 and photovoltaic port respectively by the first control switch 14 and the 3rd control switch 18; and be provided with diode 15 between described DC power supply 11 and described first control switch 14; the effect of described diode 15 is the described DC power supply 13 of protection, can not be damaged because electric current pours in down a chimney.
Described DC power supply 11, when battery tension is calibrated, it act as imitated storage battery; When photovoltaic voltage is calibrated, it act as analog solar plate; When photovoltaic charged correcting current, it act as analog solar plate.
Described accessory power supply 16 is communicated with the storage battery port of photovoltaic controller 20 by the second control switch 17, and is provided with diode 15 between described accessory power supply 16 and described second control switch 17.
Described load 19 is communicated with the storage battery port of photovoltaic controller 20.
Described light source 22 is communicated with the load port of photovoltaic controller 20 by ammeter 21.Described light source 22 is LED, can also can replace by light source according to the actual requirements, both gone for the calibration of light fixture, also gone for the calibration of load with resistance, and the scope of application is wide, practical.
Described controller 13 is by the RS485 orifice of transducer 12 with photovoltaic controller 20.
Described first control switch 14, second control switch 17 and the 3rd control switch 18 preferentially adopt economical and practical regular tap, and it switches on and off and is operated by people, solves the problem of repetition wiring like this by a kind of scheme of relatively economical.Described first control switch, the second control switch and the 3rd control switch can also be designed to all be connected with described controller 13, realize Automated condtrol, and it is convenient, practical to control.
Described DC power supply 11 preferentially adopts multi-functional, high-precision programmable power supply, the IT6512 power supply of such as Ai Dekesi; Described load 19 preferentially adopts multi-functional, high-precision electronic load, the IT8514B electronic load of such as Ai Dekesi.Programmable power supply and electronic load all have the high and advantage that function is many of precision, simple to operate, polytype loads such as constant-resistance type, constant-current type, constant-pressure type, invariable power type can be simulated, settings can be shown, virtual voltage, actual current and actual power can also be shown.
Described controller 13 preferentially adopts electronic computer, and electronic computer is cheap, SDK (Software Development Kit) and language numerous, popularization degree is high, only needs simple training just can on dutyly to use.Be deployed with calibration procedure, following job step can have been come by it; Also can adopt programmable logic controller (PLC), correspondingly program can be edited, realize controller to the management of calibration process and control, practical.
Described transducer 12 adopts RS485 to turn the transducer of USB or the transducer of RS485 RS 232 or RS485 to turn the transducer of RJ45 or RS485 turns radio switch, the conversion between multiple interfaces can be realized, realize instruction accurate, transmit fast, improve control precision and efficiency.
Adopt the system of the calibration photovoltaic controller of the present embodiment, concrete calibration steps is as follows:
(1) calibration of load current:
The calibration of load current has two calibration points, and the setting principle of two calibration points is as follows: the load current generally allowed at photovoltaic controller is I
minimum~ I
maximum(I
minimumvalue can be 0), preferentially select 0.1 times of I
maximumcurrent value is the first calibration point, I
maximumcurrent value is the second calibration point, and concrete calibration steps is as follows:
The first step: electronic load 19 does not access, disconnects the 3rd control switch 18 and the second control switch 17, closed first control switch 14, and DC power supply 11 receives the storage battery port of photovoltaic controller 20; Before calibration, the load current initial coefficients of photovoltaic controller 20 is K
0, its initial zero is Z
0;
Second step: controller 13 sends instructions to photovoltaic controller 20, its maximum bright light electric current is set to 1400mA, then is set to force lighting lamp state, then be set to 10% brightness, so LED 22 will be in 10% lighting lamp state, the electric current I (1) then shown by ammeter 21
ibe entered into controller 13, as the load current standard value of the first calibration point; Meanwhile, controller 13 sends the instruction of reading load current to photovoltaic controller 20, and photovoltaic controller 20 returns to controller 13 according to after command request sampling, and controller 13 is using the load current reading I (1) of these data as photovoltaic controller 20
0;
3rd step: controller 13 sends instructions to photovoltaic controller 20, its maximum bright light electric current is set to 1400mA, then is set to force bright light, then be set to 100% brightness, so LED 22 will be in 100% lighting lamp state, the electric current I (2) then shown by ammeter 21
ibe entered into controller 13, as the load current standard value of the second calibration point; Meanwhile, controller 13 sends the instruction of reading load current to photovoltaic controller 20, and photovoltaic controller 20 returns to controller 13 according to after command request sampling, and controller 13 is using the load current reading I (2) of these data as photovoltaic controller 20
0;
4th step: controller 13 calculates load current error delta E1 and the △ E2 of the first calibration point and the second calibration point automatically, wherein △ E1=I (1)
0-I (1)
i, judge whether the absolute value of △ E1 is greater than 0.02, △ E2=[I (2)
0-I (2)
i] × 100%/I (2)
i, judge whether the absolute value of △ E2 is greater than 3%;
If not, calibration terminates; If so, the 4th step is continued;
4th step: the coefficient resetting load current is K
n, its zero point is Z
n, meet following formula respectively:
K
n＝K
0(I
H-I
L)/(I(2)
0-I(1)
0)；
Z
n＝[I(2)
i(I(1)
0-Z
0)-I(1)
i(I(2)
0-Z
0)]/(I(2)
0-I(1)
0)；
Wherein: K
n, Z
nthe responsible current coefficient after calibration and zero point respectively, i.e. new coefficient and new zero point; K
0, Z
0bear in electric current initial coefficients and initial zero respectively; I (2)
i, I (1)
ithe load current standard value of the second calibration point, the first calibration point respectively; I (1)
0, I (2)
0the load current reading of the first calibration point, the second calibration point photovoltaic controller respectively;
5th step: return second step.
Generally carry out primary calibration can meet.If need in actual demand to repeat repeatedly to calibrate, can directly return second step from the 4th step and repeat calibration, until reach requirement according to identical mode.
(2) calibration of photovoltaic charged electric current:
Photovoltaic charged correcting current has two calibration points, and the setting principle of two calibration points is as follows: the photovoltaic charged electric current generally allowed at photovoltaic controller is I
minimum~ I
maximum(I
minimumvalue can be 0), advise being greater than I
minimum(preferably I near current value
? little+ 0.01A ~ I
minimum+ 0.5A) to get a charging current be the first calibration point, is being slightly less than I
maximum(preferably I in the scope of current value
maximum-0.5A ~ I
maximum-0.01A) to get a charging current be the second calibration point, concrete calibration steps is as follows:
The first step: before calibration, the photovoltaic electric current initial coefficients of photovoltaic controller 20 is K
0, its initial zero is Z
0; Closed 3rd control switch 18, disconnects the first control switch 14 and the second control switch 17, access electronic load 19;
Second step: electronic load 19 is set for constant current mode and electric current is the first calibration point I (1)
i, then gather the photovoltaic current indication I (1) of the photovoltaic controller 20 of this calibration point
0; Arranging electronic load 19 electric current is again the second calibration point electric current I (2)
i, then gather the reading I (2) of the photovoltaic electric current of this calibration point photovoltaic controller 20
0;
3rd step: controller 13 calculates photovoltaic electric stream error △ E1 and the △ E2 of the first calibration point and the second calibration point, wherein △ E1=I (1)
0-I (1)
i, judge whether the absolute value of △ E1 is greater than 0.05, △ E2=[I (2)
0-I (2)
i] × 100%/I (2)
i, judge whether the absolute value of △ E2 is greater than 3%;
If not, calibration terminates; If so, the 4th step is continued;
4th step: the coefficient resetting photovoltaic electric current is K
n, its zero point is Z
n, meet following formula respectively:
K
n＝K
0(I
H-I
L)/(I(2)
0-I(1)
0)；
Z
n＝[I
H(I(1)
0-Z
0)-I
L(I(2)
0-Z
0)]/(I(2)
0-I(1)
0)；
Wherein: K
n, Z
nthe photovoltaic current coefficient after calibration and zero point respectively, i.e. new coefficient and new zero point; K
0, Z
0photovoltaic electric current initial coefficients and initial zero respectively; I
h, I
lthe photovoltaic electric flow standard value of the second calibration point, the first calibration point respectively; I (1)
0, I (2)
0the photovoltaic current indication of the first calibration point, the second calibration point photovoltaic controller respectively;
5th step: return second step.
Generally carry out primary calibration can meet.If need in actual demand to repeat repeatedly to calibrate, can directly return second step from the 4th step and repeat calibration, until reach requirement according to identical mode.
(3) calibration of photovoltaic voltage:
Photovoltaic voltage calibration has two calibration points, and the setting principle of two calibration points is as follows: general is U in solar panels output voltage excursion
minimum~ U
maximum, advise slightly larger than U
minimum(preferably U in the scope of magnitude of voltage
minimum+ 0.01V ~ U
minimum+ 0.5V) to get a magnitude of voltage be the first calibration point, is being slightly less than U
maximum(preferably U in the scope of magnitude of voltage
maximum-0.5V ~ U
maximum-0.05V) to get a magnitude of voltage be the second calibration point, concrete calibration steps is as follows:
The first step: before calibration, the photovoltaic voltage initial coefficients of photovoltaic controller 20 is K
0, its initial zero is Z
0; Disconnect the first control switch 14, closed second control switch 17 and the 3rd control switch 18, electronic load 19 does not access;
Second step: arranging DC power supply 11 output voltage is the first calibration point voltage V (1)
i, then gather the photovoltaic voltage reading V (1) of the photovoltaic controller 20 of this calibration point
0; Arranging DC power supply 11 output voltage is again the second calibration point voltage V (2)
i, then gather the photovoltaic voltage reading V (2) of the photovoltaic controller 20 of this calibration point
0;
3rd step: controller 13 calculates photovoltaic voltage error delta E1 and the △ E2 of the first calibration point and the second calibration point, wherein △ E1=V (1)
0-V (1)
i, △ E2=V (2)
0-V (2)
i; Judge whether the absolute value of △ E1 or △ E2 is greater than 0.2;
If not, calibration terminates; If so, the 4th step is continued;
4th step: the coefficient resetting photovoltaic voltage is K
n, its zero point is Z
n, meet following formula respectively:
K
n＝K
0(V
H-V
L)/(V(2)
0-V(1)
0)；
Z
n＝[V
H(V(1)
0-Z
0)-V
L(V(2)
0-Z
0)]/(V(2)
0-V(1)
0)；
Wherein: K
n, Z
nthe photovoltaic voltage coefficient after calibration and zero point respectively, i.e. new coefficient and new zero point; K
0, Z
0photovoltaic voltage initial coefficients and initial zero respectively; V
h, V
lthe photovoltaic voltage standard value of the second calibration point, the first calibration point respectively; V (1)
0, V (2)
0the photovoltaic voltage reading of the first calibration point, the second calibration point photovoltaic controller respectively;
5th step: return second step.
Generally carry out primary calibration can meet.If need in actual demand to repeat repeatedly to calibrate, can directly return second step from the 4th step and repeat calibration, until reach requirement according to identical mode.
(4) calibration of battery tension:
The battery tension excursion generally allowed at storage battery is U
minimum~ U
maximum, advise slightly larger than U
minimum(preferably U in the scope of magnitude of voltage
minimum+ 0.01V ~ U
minimum+ 0.5V) to get a magnitude of voltage be the first calibration point, is being slightly less than U
maximum(preferably U in the scope of magnitude of voltage
maximum-0.5V ~ U
maximum-0.01V) to get a magnitude of voltage be the second calibration point, concrete calibration steps is specially:
The first step: before calibration, the battery tension initial coefficients of photovoltaic controller 20 is K
0, its initial zero is Z
0; Closed first control switch 14, disconnect the second control switch 17 and the 3rd control switch 18, electronic load 19 does not access;
Second step: arranging DC power supply 11 output voltage is the first calibration point voltage V (1)
i, then gather the battery tension reading V (1) of the photovoltaic controller 20 of this calibration point
0; Arranging DC power supply 11 output voltage is again the second calibration point voltage V (2)
i, then gather the battery tension reading V (2) of the photovoltaic controller 20 of this calibration point
0;
3rd step: controller 13 calculates battery tension error delta E1 and the △ E2 of the first calibration point and the second calibration point, wherein △ E1=V (1)
0-V (1)
i, △ E2=V (2)
0-V (2)
i; Judge whether the absolute value of △ E1 or △ E2 is greater than 0.2;
If not, calibration terminates; If so, the 4th step is continued;
4th step: the coefficient resetting battery tension is K
n, its zero point is Z
n, meet following formula respectively:
K
n＝K
0(V
H-V
L)/(V(2)
0-V(1)
0)；
Z
n＝[V
H(V(1)
0-Z
0)-V
L(V(2)
0-Z
0)]/(V(2)
0-V(1
)0)；
Wherein: K
n, Z
nthe battery tension coefficient after calibration and zero point respectively, i.e. new coefficient and new zero point; K
0, Z
0battery tension initial coefficients and initial zero respectively; V
h, V
lthe battery tension standard value of the second calibration point, the first calibration point respectively; V (1)
0, V (2)
0the battery tension reading of the first calibration point, the second calibration point photovoltaic controller respectively;
5th step: return second step.
Generally carry out primary calibration can meet.If need in actual demand to repeat repeatedly to calibrate, can directly return second step from the 4th step and repeat calibration, until reach requirement according to identical mode.
Adopt system of the present utility model to calibrate the battery tension of photovoltaic controller, photovoltaic voltage, photovoltaic charged electric current and load current, do not need rewiring repeatedly, time-consuming few, calibration speed is fast; And be not use serial ports assistant, but adopting controller to calibrate, accuracy is high and calibration speed fast, practical.
The foregoing is only preferred embodiment of the present utility model, be not limited to the utility model, for a person skilled in the art, the utility model can have various modifications and variations.All within spirit of the present utility model and principle, any amendment done, equivalent replacement, improvement etc., all should be included within protection range of the present utility model.
Claims (6)
1. calibrate a system for photovoltaic controller, it is characterized in that: comprise at least one in three kinds of annexations;
The first annexation: described system comprises DC power supply (11), transducer (12) and controller (13); Described controller (13) is by the RS485 orifice of transducer (12) with photovoltaic controller; Described DC power supply (11) is communicated with the storage battery port of photovoltaic controller by the first control switch (14); Diode (15) is provided with between described DC power supply (11) and described first control switch (14);
The second annexation: described system comprises DC power supply (11), transducer (12), controller (13) and accessory power supply (16); Described controller (13) is by the RS485 orifice of transducer (12) with photovoltaic controller; Described accessory power supply (16) is communicated with the storage battery port of photovoltaic controller by the second control switch (17), and is provided with diode (15) between described accessory power supply (16) and described second control switch (17); Described DC power supply (11) is communicated with the photovoltaic port of photovoltaic controller by the 3rd control switch (18);
The third annexation: described system comprises DC power supply (11), transducer (12), controller (13) and load (19); Described controller (13) is by the RS485 orifice of transducer (12) with photovoltaic controller; Described load (19) is communicated with the storage battery port of photovoltaic controller; Described DC power supply (11) is communicated with the photovoltaic port of photovoltaic controller by the 3rd control switch (18).
2. the system of calibration photovoltaic controller according to claim 1, it is characterized in that: described system also comprises ammeter (21) and light source (22), and described light source (22) is communicated with the load port of photovoltaic controller by ammeter (21).
3. the system of calibration photovoltaic controller according to claim 2, is characterized in that: described light source (22) is LED.
4. the system of the calibration photovoltaic controller according to claim 1-3 any one, is characterized in that: described controller (13) is programmable logic controller (PLC) or electronic computer.
5. the system of calibration photovoltaic controller according to claim 4, is characterized in that: described transducer (12) turns radio switch for RS485 turns the transducer of USB, the transducer of RS485 RS 232, RS485 turn RJ45 transducer or RS485.
6. the system of calibration photovoltaic controller according to claim 5, is characterized in that: described DC power supply (11) is programmable power supply; Described load (19) is electronic load.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420514021.0U CN204068861U (en) | 2014-09-05 | 2014-09-05 | A kind of system of calibrating photovoltaic controller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420514021.0U CN204068861U (en) | 2014-09-05 | 2014-09-05 | A kind of system of calibrating photovoltaic controller |
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| Publication Number | Publication Date |
|---|---|
| CN204068861U true CN204068861U (en) | 2014-12-31 |
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ID=52210301
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107219800A (en) * | 2017-06-30 | 2017-09-29 | 安徽大恒能源科技有限公司 | A kind of photovoltaic module monitoring product automatic configuration system and method |
-
2014
- 2014-09-05 CN CN201420514021.0U patent/CN204068861U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107219800A (en) * | 2017-06-30 | 2017-09-29 | 安徽大恒能源科技有限公司 | A kind of photovoltaic module monitoring product automatic configuration system and method |
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| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20141231 Termination date: 20210905 |
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