CN102545339A - Wide voltage input intelligent photovoltaic charging control system with maximum power point tracking (MPPT) function - Google Patents

Wide voltage input intelligent photovoltaic charging control system with maximum power point tracking (MPPT) function Download PDF

Info

Publication number
CN102545339A
CN102545339A CN201210024839XA CN201210024839A CN102545339A CN 102545339 A CN102545339 A CN 102545339A CN 201210024839X A CN201210024839X A CN 201210024839XA CN 201210024839 A CN201210024839 A CN 201210024839A CN 102545339 A CN102545339 A CN 102545339A
Authority
CN
China
Prior art keywords
circuit
voltage
mppt
intelligent photovoltaic
charging
Prior art date
Application number
CN201210024839XA
Other languages
Chinese (zh)
Inventor
许宜申
陶智
吴迪
张晓俊
季晶晶
Original Assignee
苏州大学
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by 苏州大学 filed Critical 苏州大学
Priority to CN201210024839XA priority Critical patent/CN102545339A/en
Publication of CN102545339A publication Critical patent/CN102545339A/en

Links

Classifications

    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy
    • Y02E10/56Power conversion systems, e.g. maximum power point trackers

Abstract

The invention discloses a wide voltage input intelligent photovoltaic charging control system with a maximum power point tracking (MPPT) function, which comprises a solar battery array and a storage battery. The solar battery array is connected with a buck-boost circuit connected with a charging circuit, and the charging circuit is connected with the storage battery. The wide voltage input intelligent photovoltaic charging control system further comprises a single microcomputer controller connected with the charging circuit, the output end of the charging circuit is fed back to the single chip microcomputer controller through a current voltage detection circuit, the single chip microcomputer controller is connected with the buck-boost circuit through a switch PWM control circuit, the storage battery is further connected with a temperature sensor used for monitoring surface temperature of the storage battery in real time, the temperature sensor is connected with a single chip microcomputer control circuit, and the single chip microcomputer control circuit is further connected with a liquid crystal module used for displaying and alarming. The wide voltage input intelligent photovoltaic charging control system can conduct preset model charging on a 12V storage battery in a range of 5V to 26V and is stable and reliable in system work.

Description

The wide voltage that possesses the MPPT function is imported intelligent photovoltaic charged control system
 
Technical field
The present invention relates to a kind of photovoltaic charged system, the concrete wide voltage that relates to a kind of MPPT of possessing function is imported intelligent photovoltaic charged control system.
 
Background technology
Solar energy is a kind of regenerative resource of cleaning, and is inexhaustible.Relevant scholarly forecast, global photovoltaic generation amount will account for about 26% of the world's gross generation the year two thousand forty, and solar energy will become the pillar of world energy sources after the year two thousand fifty.But the photoelectric conversion efficiency of solar cell is lower at present, adds the loss of circuit system, and its overall efficiency has only about 11%, is one of key issue of solar energy utilization so how to improve the efficient of photovoltaic system.As the energy-storage travelling wave tube in the photovoltaic charge-discharge system; Storage battery generates the lead sulfate crystallization that is difficult to convert into active material easily on pole plate when constant voltage or constant current charge; Cause that storage battery conductivity is bad, resistance is big, solubility and dissolution velocity are little, have a strong impact on its useful life.
Solar panel is a kind of semiconductor device that can absorb sunlight and be converted into electric energy; As shown in Figure 1 with output voltage-current characteristic resulting equivalent electric circuit according to its internal structure, it is gone here and there a resistance again by a parallelly connected diode of current source that receives light intensity and temperature effect and forms.
The maximum power point of solar panel receives the influence of intensity of illumination and cell panel working temperature at that time, and its maximum power point is different under the different illumination intensity, and is as shown in Figure 2.Among Fig. 2, S representes intensity of illumination, and W, V and I represent power output, output voltage and the electric current of solar panel respectively.Can know that by Fig. 2 when solar panel always worked in maximum power point, its output energy reached maximum.Thereby, need the control corresponding algorithm under fast-changing weather condition, effectively to follow the tracks of maximum power point, make cell panel be operated in as much as possible on the maximum power point, be the MPPT algorithm.
According to Thevenin's theorem; With the simple equivalence of solar cell is the series connection of a desirable direct voltage source and a source resistance r; As shown in Figure 3, the resistance of the voltage of this direct voltage source and series connection changes certainly.
The power that a certain moment load resistance is obtained:
(1)
Formula (1) both sides can get differentiate:
(2)
By the formula (2) shows that: When when Output power P reaches a maximum.
Because when solar panel received light intensity, temperature, angle of incidence of sunlight etc. and influences, its output voltage, output current and internal resistance constantly changed, thereby have only dynamic change load equivalent resistance, could make the power output of solar panel reach the highest.
 
Summary of the invention
The photovoltaic charger conversion efficiency is low in the prior art, storage battery conductivity is bad, resistance is big in order to overcome; Some other shortcoming of the little and common photovoltaic charge controller of solubility and dissolution velocity; The present invention utilizes the MPPT algorithm to improve the integral light photoelectric transformation efficiency of system; The pulse current charge pattern can be slowed down the sulphation crystallization process, repaired impaired storage battery, prolongs its useful life effectively.In addition, the real-time monitoring and the excess temperature of accumulator meter surface temperature stop charge function automatically, make charging process be in a safe condition all the time.
For realizing above-mentioned technical purpose, reach above-mentioned technique effect, the present invention has adopted following technical scheme:
A kind of wide voltage of the MPPT of possessing function is imported intelligent photovoltaic charged control system; Comprise solar battery array and storage battery; Said solar battery array is connected with step-up/step-down circuit; Said step-up/step-down circuit connects the charging circuit with pulse current charge function, and said charging circuit connects said storage battery; Also comprise singlechip controller; Said singlechip controller connects said charging circuit; Being used to control the charge mode that charging circuit carries out difference in functionality charges; Comprise quick charge, pulse current charge, floating charge and stop charging automatically; The output of said charging circuit feeds back to said singlechip controller through the current/voltage testing circuit, and said singlechip controller also is connected to said step-up/step-down circuit through the switch PWM control circuit, and said switch PWM control circuit changes the equivalent resistance of loading section through the pulse duty factor of by-pass cock pipe.
Further, said storage battery also is connected with the temperature sensor that is used for monitoring in real time the accumulator meter surface temperature, and said temperature sensor connects said single chip machine controlling circuit; Said temperature sensor is the surface temperature of the said storage battery of monitoring in real time, and charging process is in a safe condition all the time, when its surface temperature surpasses 45 ℃, stops charging automatically.
Further, said single chip machine controlling circuit also connects one and is used to the Liquid Crystal Module that shows and report to the police.
Compared with prior art, the present invention has the following advantages:
(1) the present invention adopts the MPPT algorithm, and system's photoelectric conversion efficiency is high;
(2) through step-up/step-down circuit, realize wide voltage input, can in the 5V-26V input voltage range, realize charge function;
Have quick charge, pulse current charge, floating charge function when (3) charging, effectively postpone the useful life of storage battery;
(4) automatic charge closing when battery temp reaches set point, safe charging and protection storage battery;
(5) through test repeatedly, it is reliable that wide voltage of the present invention is imported intelligent photovoltaic charged control system working stability.
Above-mentioned explanation only is the general introduction of technical scheme of the present invention, understands technological means of the present invention in order can more to know, and can implement according to the content of specification, below with preferred embodiment of the present invention and conjunction with figs. specify as after.
 
Description of drawings
Accompanying drawing described herein is used to provide further understanding of the present invention, constitutes the application's a part, and illustrative examples of the present invention and explanation thereof are used to explain the present invention, do not constitute improper qualification of the present invention.In the accompanying drawings:
Fig. 1 is the solar panel equivalent circuit diagram.
Fig. 2 is the power output and the output voltage current relationship figure of solar panel.
Fig. 3 is the linear system circuit diagram.
Fig. 4 imports the complete schematic of intelligent photovoltaic charged system for the wide voltage of the MPPT of possessing function of the present invention.
Fig. 5 imports the step-up/step-down circuit schematic diagram of intelligent photovoltaic charged system for the wide voltage of the MPPT of possessing function of the present invention.
Fig. 6 imports the charging circuit schematic diagram of intelligent photovoltaic charged system for the wide voltage of the MPPT of possessing function of the present invention.
Fig. 7 imports the voltage and current detection circuit schematic diagram of intelligent photovoltaic charged system for the wide voltage of the MPPT of possessing function of the present invention; Wherein, Fig. 7 (a) is the voltage detecting circuit schematic diagram; Fig. 7 (b) is the electric circuit inspection circuit theory diagrams.
 
Embodiment
Below with reference to accompanying drawing and combine embodiment, specify the present invention.
Referring to shown in Figure 4; A kind of wide voltage of the MPPT of possessing function is imported intelligent photovoltaic charged control system; Comprise solar battery array 8 and storage battery 9; Said solar battery array 8 is connected with step-up/step-down circuit 1, and said step-up/step-down circuit 1 connects the charging circuit 2 with pulse current charge function, and said charging circuit 2 connects said storage battery 9; Also comprise singlechip controller 6; Said singlechip controller 6 connects said charging circuit 2; Being used to control the charge mode that charging circuit carries out difference in functionality charges; Comprise quick charge, pulse current charge, floating charge and stop charging automatically; The output of said charging circuit 2 feeds back to said singlechip controller 6 through current/voltage testing circuit 3, and said singlechip controller 6 also is connected to said step-up/step-down circuit 1 through switch PWM control circuit 4, and said switch PWM control circuit 4 changes the equivalent resistance of loading section through the pulse duty factor of by-pass cock pipe.
Further, said storage battery 9 also is connected with the temperature sensor 7 that is used for monitoring in real time the accumulator meter surface temperature, and said temperature sensor 7 connects said single chip machine controlling circuit 6; Said temperature sensor 6 is the surface temperature of the said storage battery 9 of monitoring in real time, and charging process is in a safe condition all the time, when its surface temperature surpasses 45 ℃, stops charging automatically.
Further, said single chip machine controlling circuit 6 also connects one and is used to the Liquid Crystal Module 5 that shows and report to the police, and said Liquid Crystal Module 5 connects said temperature sensor 7.
Referring to shown in Figure 5; Said step-up/step-down circuit 1 comprises the boost-voltage regulator circuit 101 and the main switching voltage regulating circuit 102 that is made up of regulator U2 that mainly is made up of boost-voltage regulator U1, and the output of said boost-voltage regulator circuit 101 connects the input of said switching voltage regulating circuit 102; The input of said boost-voltage regulator circuit 101 is connected with the first voltage-stabiliser tube D1, and output is connected with the luminous branch road that is made up of light-emitting diode D2 and resistance series connection; The feedback end of said switching voltage regulating circuit 102 is an adjustable resistance R_adj, and the end of said adjustable resistance R_adj is through grounding through resistance, and the other end passes through capacity earth.
Referring to shown in Figure 6; Said charging circuit 2 mainly is made up of the current source U3 of adjustable output switching mode synchronous rectifier; Be connected with first resistance R 1 through second switch J2 and the 3rd switch J3 between negative comparator input terminal CS-of the current detecting of the current source U3 of said adjustable output switching mode synchronous rectifier and the positive current detection comparator input CS+; And be connected with second resistance R 2 through the 4th switch J4 and the 5th switch J5; Cross-over connection has the first switch J1 on said first resistance R 1, and cross-over connection has the 6th switch J6 on said second resistance R 2.
Preferably, the current source U3 of said adjustable output switching mode synchronous rectifier is MAX1640 integrated chip or MAX1641 integrated chip.
When the current source U3 of said adjustable output switching mode synchronous rectifier is the MAX1640 integrated chip, need the first switch J1, the 4th switch J4, the 5th J5 switch be broken off second switch J2, the 3rd switch J3, the 6th switch J6 closure; When the current source U3 of said adjustable output switching mode synchronous rectifier is the MAX1641 integrated chip, need be with the first switch J1, the 4th switch J4, the 5th J5 switch closure, second switch J2, the 3rd switch J3, the 6th switch J6 break off.
Referring to shown in Figure 7, said current/voltage testing circuit 3 comprises current detection circuit, voltage detecting circuit and A/D change-over circuit, and said A/D change-over circuit is used for the collection of electric current and voltage.Said current detection circuit mainly comprises the differential input operational amplifier U4 of first two-way, shown in Fig. 7 (a).Said voltage detecting circuit mainly comprises the differential input operational amplifier U5 of second two-way, shown in Fig. 7 (b).
The above is merely the preferred embodiments of the present invention, is not limited to the present invention, and for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.

Claims (10)

1. the wide voltage that possesses the MPPT function is imported intelligent photovoltaic charged control system; Comprise solar battery array (8) and storage battery (9); It is characterized in that: said solar battery array (8) is connected with the step-up/step-down circuit (1) of the voltage stabilizing input that is used to realize the solar panel output voltage; Said step-up/step-down circuit (1) connects the charging circuit (2) with pulse current charge function, and said charging circuit (2) connects said storage battery (9); Also comprise singlechip controller (6); Said singlechip controller (6) connects said charging circuit (2); Being used to control the charge mode that charging circuit carries out difference in functionality charges; Comprise quick charge, pulse current charge, floating charge and stop charging automatically; The output of said charging circuit (2) feeds back to said singlechip controller (6) through current/voltage testing circuit (3), and said singlechip controller (6) also is connected to said step-up/step-down circuit (1) through switch PWM control circuit (4), and said switch PWM control circuit (4) changes the equivalent resistance of loading section through the pulse duty factor of by-pass cock pipe.
2. the wide voltage of the MPPT of possessing function according to claim 1 is imported intelligent photovoltaic charged control system; It is characterized in that: said storage battery (9) also is connected with the temperature sensor (7) that is used for monitoring in real time the accumulator meter surface temperature, and said temperature sensor (7) connects said single chip machine controlling circuit (6).
3. the wide voltage of the MPPT of possessing function according to claim 1 is imported intelligent photovoltaic charged control system, it is characterized in that: said single chip machine controlling circuit (6) also connects one and is used to the Liquid Crystal Module (5) that shows and report to the police.
4. the wide voltage of the MPPT of possessing function according to claim 2 is imported intelligent photovoltaic charged control system, it is characterized in that: said single chip machine controlling circuit (6) also connects one and is used to the Liquid Crystal Module (5) that shows and report to the police.
5. the wide voltage of the MPPT of possessing function according to claim 1 is imported intelligent photovoltaic charged control system; It is characterized in that: said step-up/step-down circuit (1) comprise mainly the boost-voltage regulator circuit (101) that constitutes by boost-voltage regulator (U1) with mainly by the switching voltage regulating circuit (102) of regulator (U2) formation, the output of said boost-voltage regulator circuit (101) connects the input of said switching voltage regulating circuit (102); The input of said boost-voltage regulator circuit (101) is connected with first voltage-stabiliser tube (D1), and output is connected with the luminous branch road that is made up of light-emitting diode (D2) and resistance series connection; The feedback end of said switching voltage regulating circuit (102) is an adjustable resistance (R_adj), and an end of said adjustable resistance (R_adj) is through grounding through resistance, and the other end passes through capacity earth.
6. the wide voltage of the MPPT of possessing function according to claim 1 is imported intelligent photovoltaic charged control system; It is characterized in that: said charging circuit (2) mainly is made up of the current source (U3) of adjustable output switching mode synchronous rectifier; Be connected with first resistance (R1) through second switch (J2) and the 3rd switch (J3) between negative comparator input terminal (CS-) of the current detecting of the current source (U3) of said adjustable output switching mode synchronous rectifier and the positive current detection comparator input (CS+); And be connected with second resistance (R2) through the 4th switch (J4) and the 5th switch (J5); Said first resistance (R1) is gone up cross-over connection has first switch (J1), and said second resistance (R2) is gone up cross-over connection has the 6th switch (J6).
7. import intelligent photovoltaic charged control system according to the wide voltage of the described MPPT of the possessing function of claim 6, it is characterized in that: the current source (U3) of said adjustable output switching mode synchronous rectifier is MAX1640 integrated chip or MAX1641 integrated chip.
8. import intelligent photovoltaic charged control system according to the wide voltage of each the described MPPT of possessing function in the claim 1 to 7, it is characterized in that: said current/voltage testing circuit (3) comprises current detection circuit and voltage detecting circuit.
9. the wide voltage of the MPPT of possessing function according to claim 8 is imported intelligent photovoltaic charged control system, it is characterized in that: said current detection circuit mainly comprises the differential input operational amplifier of first two-way (U4).
10. the wide voltage of the MPPT of possessing function according to claim 8 is imported intelligent photovoltaic charged control system, it is characterized in that: said voltage detecting circuit mainly comprises the differential input operational amplifier of second two-way (U5).
CN201210024839XA 2012-02-06 2012-02-06 Wide voltage input intelligent photovoltaic charging control system with maximum power point tracking (MPPT) function CN102545339A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201210024839XA CN102545339A (en) 2012-02-06 2012-02-06 Wide voltage input intelligent photovoltaic charging control system with maximum power point tracking (MPPT) function

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201210024839XA CN102545339A (en) 2012-02-06 2012-02-06 Wide voltage input intelligent photovoltaic charging control system with maximum power point tracking (MPPT) function

Publications (1)

Publication Number Publication Date
CN102545339A true CN102545339A (en) 2012-07-04

Family

ID=46351534

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201210024839XA CN102545339A (en) 2012-02-06 2012-02-06 Wide voltage input intelligent photovoltaic charging control system with maximum power point tracking (MPPT) function

Country Status (1)

Country Link
CN (1) CN102545339A (en)

Cited By (7)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103580086A (en) * 2012-10-10 2014-02-12 易程(苏州)智能系统有限公司 Battery charging control circuit
CN104316755A (en) * 2014-11-06 2015-01-28 电子科技大学 Wide-voltage electrical signal voltage detecting device
CN104682864A (en) * 2013-11-26 2015-06-03 张云山 Adaptive solar current collection device
US9065336B2 (en) 2013-06-26 2015-06-23 Industrial Technology Research Institute Maximum power point tracking method and apparatus
CN105006858A (en) * 2015-07-14 2015-10-28 合肥华信电动科技发展有限公司 Solar intelligent charging system for sanitation truck
CN110444827A (en) * 2019-07-22 2019-11-12 深圳源创智能照明有限公司 A kind of charge control method and solar energy photovoltaic system based on MPPT
CN110581567A (en) * 2019-08-08 2019-12-17 国网山东省电力公司济南市历城区供电公司 Power transmission method and system for tracking internal resistance matching in real time

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202034804U (en) * 2011-04-20 2011-11-09 合肥赛光电源科技有限公司 High-performance complementary wind-solar power controller
CN202034834U (en) * 2011-04-26 2011-11-09 张泽宇 Electric motor

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN202034804U (en) * 2011-04-20 2011-11-09 合肥赛光电源科技有限公司 High-performance complementary wind-solar power controller
CN202034834U (en) * 2011-04-26 2011-11-09 张泽宇 Electric motor

Non-Patent Citations (2)

* Cited by examiner, † Cited by third party
Title
NATIONAL SEMICONDUCTOR: "Adjust or Synchronize LM2586/88 Switching Frequency", 《电源世界》 *
郭光伟: "小功率独立光伏控制器的设计", 《中国优秀硕士论文全文库》 *

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103580086A (en) * 2012-10-10 2014-02-12 易程(苏州)智能系统有限公司 Battery charging control circuit
CN103580086B (en) * 2012-10-10 2015-12-09 苏州华启智能科技有限公司 A kind of battery charge control circuit
US9065336B2 (en) 2013-06-26 2015-06-23 Industrial Technology Research Institute Maximum power point tracking method and apparatus
CN104682864A (en) * 2013-11-26 2015-06-03 张云山 Adaptive solar current collection device
CN104316755A (en) * 2014-11-06 2015-01-28 电子科技大学 Wide-voltage electrical signal voltage detecting device
CN104316755B (en) * 2014-11-06 2017-01-18 电子科技大学 Wide-voltage electrical signal voltage detecting device
CN105006858A (en) * 2015-07-14 2015-10-28 合肥华信电动科技发展有限公司 Solar intelligent charging system for sanitation truck
CN110444827A (en) * 2019-07-22 2019-11-12 深圳源创智能照明有限公司 A kind of charge control method and solar energy photovoltaic system based on MPPT
CN110581567A (en) * 2019-08-08 2019-12-17 国网山东省电力公司济南市历城区供电公司 Power transmission method and system for tracking internal resistance matching in real time

Similar Documents

Publication Publication Date Title
Ding et al. Modeling and simulation of grid-connected hybrid photovoltaic/battery distributed generation system
CN102355165B (en) Photovoltaic power generation device with global maximum power output function
CN101459997B (en) Wind light complementary road lamp intelligent controller having adaptive adjustment capability
CN202886997U (en) Automatically sunlight-tracking robot
CN201910625U (en) Grid-connected photovoltaic inverter based on super capacitor
CN204597821U (en) Thermo-electric generation system
CN203250503U (en) Self-discharging wind-load advertising board system in wind and solar complementary power generation mode
CN102595716B (en) Solar light-emitting diode (LED) street lamp monitoring system
CN2717092Y (en) Solar energy, wind power and diesel power generation and battery bank integrated AC power supply
CN102638195B (en) Solar energy generating system control method
CN102913839A (en) Solar power supplied energy-saving illumination system
CN201393185Y (en) Solar photovoltaic novel controller
CN201985788U (en) Solar power generation controller
CN200961814Y (en) Sun-tracked photoelectrical complementary solar energy road lamp
CN101505565A (en) SoC chip for independent photovoltaic LED lighting special controller
CN205212526U (en) Electrical power generating system of long -term integration based on thin -film solar cell
CN102111088A (en) Photovoltaic power generation control system
CN202333928U (en) Comprehensive power-supply system for solar fan
CN203457103U (en) Solar photoelectric power generating device
CN105356581B (en) A kind of electric automobile charging station based on wind energy and photovoltaic power generation
CN206611188U (en) Highway sector distribution is provided multiple forms of energy to complement each other energy micro-grid system
CN204203774U (en) A kind of all-weather solar autotracker
CN102523662A (en) Road tunnel distributed type illuminating system based on wind and light complementation
CN205195626U (en) Intelligence of scene mating type chases after a day power supply system
CN202902134U (en) Solar energy-saving illuminating system

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
C02 Deemed withdrawal of patent application after publication (patent law 2001)
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20120704