CN106020328A - MPPT regulating circuit and method - Google Patents
MPPT regulating circuit and method Download PDFInfo
- Publication number
- CN106020328A CN106020328A CN201610556303.0A CN201610556303A CN106020328A CN 106020328 A CN106020328 A CN 106020328A CN 201610556303 A CN201610556303 A CN 201610556303A CN 106020328 A CN106020328 A CN 106020328A
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- circuit
- mppt
- current
- charging
- mcu controller
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- 238000000034 method Methods 0.000 title claims abstract description 16
- 230000001105 regulatory effect Effects 0.000 title claims abstract description 10
- 238000005070 sampling Methods 0.000 claims abstract description 8
- 230000005611 electricity Effects 0.000 claims description 5
- 238000010586 diagram Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000001276 controlling effect Effects 0.000 description 1
- 238000000465 moulding Methods 0.000 description 1
- 230000003068 static effect Effects 0.000 description 1
Classifications
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/66—Regulating electric power
- G05F1/67—Regulating electric power to the maximum power available from a generator, e.g. from solar cell
Abstract
The invention provides an MPPT regulating circuit and an MPPT regulating method. The MPPT regulating circuit comprises a charging control module and an MPPT regulating module, wherein the charging control module comprises a voltage division circuit of a solar cell panel and an MPPT control circuit; and the MPPT regulating module comprises an MCU controller and a charging voltage sampling circuit and a charging current sampling circuit of a storage battery; an output end of the charging voltage sampling circuit is connected with a first input end of the MCU controller, an output end of the charging current sampling circuit is connected with a second input end of the MCU controller, an output end of the voltage division circuit is connected with a third input end of the MCU controller, and an output end of the MCU controller is connected with an MPPTSET end of the MPPT control circuit. The MCU controller is used for regulating the specific value of an output value of the output end of the storage battery and an input value of the third input end according to the charging voltage and the charging current of the storage battery to drive the charging control module to dynamically regulate an MPPT point of the solar cell panel, so that the solar cell panel can work at a maximum power point at different temperature environments throughout, and the highest charging efficiency is achieved.
Description
Technical field
The present invention relates to technical field of solar batteries, particularly relate to a kind of MPPT regulation circuit and regulation
Method.
Background technology
Generate electricity as clean energy resource important one of photovoltaic generation, presents vigorous growth trend in recent years.
Owing to the operation principle characteristic of solar panel is in external environment (temperature, sunshine, the angle of system
Deng) under the conditions of, different array output voltages can obtain different outputs, in order to the most defeated
Go out electric energy, photovoltaic system system must be carried out MPPT maximum power point tracking (MPPT,
Maximum Power Point Tracking) control.
MPPT system is a kind of duty by regulating electrical module, enables solar panel defeated
Go out the electrical system of more electric energy, it is possible to the unidirectional current sent by solar panel is stored in storage effectively
In battery.Different temperature conditionss, at a temperature of difference, solar-electricity are mainly tackled in the appearance of MPPT
All correspondence one can be with the voltage of Maximum Power Output for pond plate.But in one day, ambient temperature is dynamically to become
Change, so wanting to reach the maximum power output of maximum solar panel, it is necessary to regulate dynamically
The output voltage of solar panel, so that solar panel is under different temperature environments, it is thus achieved that
Maximum power output.
Fig. 1 is existing charging control circuit, and the MPPT point in existing charging control circuit is by dividing potential drop mould
Block dividing potential drop obtains, and the MPPTSET in charging control circuit is by the branch pressure voltage of resistance R3 Yu R4 and base
Quasi-voltage 1.2V compares, by internal logic control circuit, the output of regulation solar panel
Voltage so that solar array voltage * R4/ (R3+R4)=1.2V.The circuit ratio by R3 and R4,
Control the MPPT point of solar panel.I.e. solar cell panel voltages=1.2V/R4* (R3+R4).
But, in available circuit, after once the ratio of R3 and R4 determines, the voltage of MPPT point is the most true
Fixed, this circuit will be unable to tackle the situation of variations in temperature.The most existing charging control circuit is only static
MPPT circuit, it is impossible to follow the trail of the variations in temperature of solar panel.
Summary of the invention
In view of the above problems, the present invention proposes a kind of MPPT regulation circuit and control method, so that too
Sun can always work near maximum power point by cell panel under different temperature environments, fills reaching the highest
Electrical efficiency.
According to the first aspect of the invention, it is provided that a kind of MPPT regulates circuit, described regulation circuit bag
Include: charge control module and MPPT adjustment module；
Described charge control module is made up of bleeder circuit and the MPPT control circuit of solar panel；
Described MPPT adjustment module is by the charging voltage sample circuit of MCU controller and accumulator and fills
Electricity current sampling circuit composition；
The outfan of described charging voltage sample circuit is connected with the first input end of described MCU controller,
The outfan of described charge current sample circuit is connected with the second input of described MCU controller, described
The outfan of bleeder circuit is connected with the 3rd input of described MCU controller, described MCU controller
Outfan be connected with the MPPTSET end of described MPPT control circuit；
Described charging voltage sample circuit and described charge current sample circuit, for by described accumulator
Charging voltage and charging current are uploaded to described MCU controller, for described MCU controller according to institute
State charging voltage and the current charge power of the charging current described accumulator of calculating, and in described current charging
When power is not reaching to charge power maximum corresponding to Current Temperatures environment, described MCU controller passes through
Regulate the ratio of the output valve of its outfan and the input value of the 3rd input, so that charge control module is adjusted
The output voltage of node solar battery plate, until the charge power of described accumulator reaches Current Temperatures environment
Corresponding charge power maximum.
Wherein, described MCU controller, including control unit and be connected with described control unit first
AD input module, the 2nd AD input module, the 3rd AD input module and DA output module；
A described AD input module is connected with the outfan of described charging voltage sample circuit, and described
Two AD input modules are connected with the outfan of described charge current sample circuit, and described 3rd AD inputs mould
Block is connected with the outfan of described bleeder circuit, described DA output module and described MPPT control circuit
MPPTSET end connect.
Wherein, described bleeder circuit is made up of the first resistance and the second resistance, the first of described first resistance
End is connected with the positive pole of described solar panel, the second end of described first resistance and described second electricity
First end of resistance is connected, and the second end of described second resistance is connected with the negative pole of described solar panel
Connecing, the junction point of described first resistance and described second resistance is as the outfan of described bleeder circuit.
Wherein, described charge current sample circuit uses current sense amplifier to realize.
Wherein, described MPPT control circuit is the MPPT control circuit using BQ24650 chip to realize.
According to the second aspect of the invention, it is provided that a kind of based on MPPT as above regulation circuit
MPPT control method, the method includes:
Described charging voltage sample circuit, charge current sample circuit gather the charging of described accumulator respectively
Voltage and charging current, and it is uploaded to described MCU controller；
Described MCU controller calculates the current of described accumulator according to described charging voltage and charging current
Charge power, and judge described current charge power be whether charge power that Current Temperatures environment is corresponding
Big value；
If current charge power is not the charge power maximum that Current Temperatures environment is corresponding, the most described MCU
Controller is by the input of the 3rd input of the output valve Yu described MCU controller that regulate its outfan
The ratio of value, so that the output voltage of charge control module regulation solar panel, until described electric power storage
The charge power in pond reaches the charge power maximum that Current Temperatures environment is corresponding.
Wherein, described judge whether described current charge power is the charge power that Current Temperatures environment is corresponding
Maximum, including:
Described MCU controller is by the input value of the output valve Yu the 3rd input that regulate its outfan
Ratio, it is judged that after ratio regulation, whether the charge power of described accumulator is more than currently filling of described accumulator
Electrical power, if, it is determined that described current charge power is not the charge power that Current Temperatures environment is corresponding
Maximum.
The MPPT that the embodiment of the present invention provides regulates circuit and control method, by controlling in existing charging
Module arranges MPPT adjustment module, and makes charge control module regulate too by MPPT adjustment module
The output voltage of sun energy cell panel, until the charge power of accumulator reaches corresponding the filling of Current Temperatures environment
Electrical power maximum, it is achieved dynamically regulate the MPPT point of solar panel so that solar panel
Always work under different temperature environments near maximum power point, to reach high recharge efficiency.
Described above is only the general introduction of technical solution of the present invention, in order to better understand the skill of the present invention
Art means, and can being practiced according to the content of description, and in order to allow, the present invention's is above and other
Objects, features and advantages can become apparent, below especially exemplified by the detailed description of the invention of the present invention.
Accompanying drawing explanation
By reading the detailed description of hereafter preferred implementation, various other advantage and benefit for this
Field those of ordinary skill will be clear from understanding.Accompanying drawing is only used for illustrating the purpose of preferred implementation,
And it is not considered as limitation of the present invention.And in whole accompanying drawing, be denoted by the same reference numerals
Identical parts.In the accompanying drawings:
Fig. 1 is the circuit theory diagrams of existing charging control circuit；
Fig. 2 is the electrical block diagram of a kind of MPPT of embodiment of the present invention regulation circuit；
Fig. 3 is that the MPPT of the embodiment of the present invention regulates the circuit theory of charge current sample circuit in circuit
Figure；
Fig. 4 is the electrical block diagram of a kind of MPPT of another embodiment of the present invention regulation circuit；
Fig. 5 is the schematic flow sheet of the embodiment of the present invention a kind of MPPT control method.
Detailed description of the invention
Embodiments of the invention are described below in detail, and the example of described embodiment is shown in the drawings, wherein
The most same or similar label represents same or similar element or has same or like function
Element.The embodiment described below with reference to accompanying drawing is exemplary, is only used for explaining the present invention, and
It is not construed as limiting the claims.
As in figure 2 it is shown, the MPPT that the embodiment of the present invention proposes regulates circuit, including charge control module 1 He
MPPT adjustment module 2；
Charge control module 1 in the present embodiment is controlled by the bleeder circuit 11 and MPPT of solar panel
Circuit 12 forms；
MPPT adjustment module 2 in the present embodiment is adopted by the charging voltage of MCU controller 21 and accumulator
Sample circuit 22 and charge current sample circuit 23 form；
The outfan of described charging voltage sample circuit 22 connects with the first input end of described MCU controller 21
Connecing, the outfan of described charge current sample circuit 23 connects with the second input of described MCU controller 21
Connecing, the outfan of described bleeder circuit 11 is connected with the 3rd input of described MCU controller 21, described
The outfan of MCU controller 21 is connected with the MPPTSET end of described MPPT control circuit 12；
Described charging voltage sample circuit 21 and described charge current sample circuit 23, for by described electric power storage
The charging voltage in pond and charging current are uploaded to described MCU controller 21, for described MCU controller 21
Calculate the current charge power of described accumulator according to described charging voltage and charging current, and work as described
When front charge power is not reaching to charge power maximum corresponding to Current Temperatures environment, described MCU controls
Device 21 is by the ratio of the input value of the output valve Yu the 3rd input that regulate its outfan, so that charging control
Molding block 1 regulates the output voltage of solar panel, until the charge power of described accumulator reaches current
The charge power maximum that temperature environment is corresponding.
Wherein, described charging voltage sample circuit 22 uses the mode of electric resistance partial pressure to realize, and charging voltage is adopted
Employing voltage is uploaded to MCU controller 21 by sample circuit.
Wherein, described charge current sample circuit 23 uses current sense amplifier to realize, and physical circuit is former
Reason figure is as shown in Figure 3.Wherein, R2 is current sampling resistor, and sample rate current is by current sense amplifier
MCU controller 21 it is uploaded to after reason.
Wherein, described MPPT control circuit 12 is the MPPT control circuit using BQ24650 chip to realize.
The physical circuit schematic diagram of the MPPT control circuit that BQ24650 chip realizes is as shown in Figure 1.
In the embodiment of the present invention, as shown in Figure 4, described MCU controller 21, including control unit 211 with
And be connected with described control unit 211 an AD input module 212, the 2nd AD input module 213,
Three AD input module 214 and DA output modules 215；
A described AD input module 212 is connected with the outfan of described charging voltage sample circuit 22, institute
State the 2nd AD input module 213 to be connected with the outfan of described charge current sample circuit 23, the described 3rd
AD input module 214 is connected with the outfan of described bleeder circuit 11, and described DA output module 215 is with described
The MPPTSET end of MPPT control circuit 12 connects.
In the embodiment of the present invention, MCU controller includes three AD passages and a DA passage, three AD
Passage is respectively ADPassage 1、ADPassage 2And ADPassage 3, the most corresponding above-mentioned AD input module 212,
2nd AD input module 213 and the 3rd AD input module 214；One DAPassageThe most above-mentioned DA output module
215。
Further, seeing Fig. 4, described bleeder circuit 11 is made up of the first resistance R3 and the second resistance R4,
Described first end of the first resistance R3 is connected with the positive pole of described solar panel, described first resistance
Second end of R3 is connected with first end of described second resistance R4, second end of described second resistance R4 with
The negative pole of described solar panel is connected, the connection of described first resistance R3 and described second resistance R4
Point is as the outfan of described bleeder circuit 11.
The operation principle of the MPPT regulation circuit proposed the present embodiment below is specifically described.
In the present embodiment, VSolar panel/ (R3+R4) * R4=ADPassage 3Sampled value；
It is assumed that DAPassageOutput valve * coefficient A=ADPassage 3Sampled value；
And for ensureing the normal work of circuit, have DAPassageOutput valve=1.2V；
The output relation that then circuit is overall is:
1.2V* coefficient A/R4* (R3+R4)=VSolar panel。
Visible, the embodiment of the present invention by changing the value of coefficient A, and then can dynamically regulate solaode
The magnitude of voltage of plate.Concrete, MCU controller passes through ADPassage 1And ADPassage 2The voltage of sampling charging and electricity
Stream, and calculate the power of charging, i.e. the output of solar panel, then current according to obtain
Power, it may be judged whether the charge power maximum that Current Temperatures environment is corresponding, if arrived, then keeps working as
The value of front coefficient A, keeps current solar cell panel voltages, if not up to, will change coefficient A's
Value, dynamically changes the output voltage of solar panel.
The MPPT that the embodiment of the present invention provides regulates circuit, by arranging in existing charge control module
MPPT adjustment module, and make charge control module regulation solar panel by MPPT adjustment module
Output voltage, until the charge power of accumulator reaches the charge power maximum that Current Temperatures environment is corresponding,
Realize dynamically regulating the MPPT point of solar panel so that solar panel is in different temperature environments
Under always work near maximum power point, to reach high recharge efficiency.
Additionally, the embodiment of the present invention additionally provides a kind of based on the MPPT regulation circuit described in example performed as described above
MPPT control method, as it is shown in figure 5, the method includes:
S11, charging voltage sample circuit, charge current sample circuit gather the charging of described accumulator respectively
Voltage and charging current, and it is uploaded to described MCU controller；
S12, MCU controller calculates currently filling of described accumulator according to described charging voltage and charging current
Electrical power, and judge whether described current charge power is that the charge power that Current Temperatures environment is corresponding is maximum
Value；
If the current charge power of S13 is not the charge power maximum that Current Temperatures environment is corresponding, then described
MCU controller by the ratio of the input value of the output valve Yu the 3rd input that regulate its outfan so that
The output voltage of charge control module regulation solar panel, until the charge power of described accumulator reaches
To the charge power maximum that Current Temperatures environment is corresponding.
If the current charge power of S14 reaches the charge power maximum that Current Temperatures environment is corresponding, then keep
The outfan of MCU controller and the ratio of the input value of the 3rd input, to keep current solar-electricity
The output voltage of pond plate.
Further, step S12 judges that whether described current charge power is that Current Temperatures environment is corresponding
Charge power maximum, specifically include:
Described MCU controller by the output valve Yu described MCU controller that regulate its outfan the 3rd
The ratio of the input value of input, it is judged that after ratio regulation, whether the charge power of described accumulator is more than institute
State the current charge power of accumulator, if, it is determined that described current charge power is not Current Temperatures ring
The charge power maximum that border is corresponding.
If additionally, the charge power of described accumulator is less than the current charging of described accumulator after ratio regulation
Power, the most again carries out the regulation of different directions, heavily enters to judge described ratio, until described storage
The charge power of battery reaches the charge power maximum that Current Temperatures environment is corresponding.
The MPPT control method that the embodiment of the present invention provides, it is possible to realize the MPPT to solar panel
The dynamic regulation of point so that solar panel always works in peak power under different temperature environments
Near Dian, to reach high recharge efficiency.
In the description of the present invention, illustrate a large amount of detail.It is to be appreciated, however, that the present invention
Embodiment can be put into practice in the case of not having these details.In some instances, show the most in detail
Go out known method, structure and technology, in order to do not obscure the understanding of this description.
Although additionally, it will be appreciated by those of skill in the art that embodiments more described herein include it
Some feature included in its embodiment rather than further feature, but the group of the feature of different embodiment
Close and mean to be within the scope of the present invention and formed different embodiments.Such as, in following power
In profit claim, one of arbitrarily can mode making in any combination of embodiment required for protection
With.
Last it is noted that various embodiments above is only in order to illustrate technical scheme, rather than right
It limits；Although the present invention being described in detail with reference to foregoing embodiments, this area common
Skilled artisans appreciate that the technical scheme described in foregoing embodiments still can be modified by it,
Or the most some or all of technical characteristic is carried out equivalent；And these amendments or replacement, and
The essence not making appropriate technical solution departs from the scope of various embodiments of the present invention technical scheme, and it all should be contained
In the middle of the claim of the present invention and the scope of description.
Claims (7)
1. a MPPT regulates circuit, it is characterised in that described regulation circuit includes: charging controls mould
Block and MPPT adjustment module；
Described charge control module is made up of bleeder circuit and the MPPT control circuit of solar panel；
Described MPPT adjustment module is by the charging voltage sample circuit of MCU controller and accumulator and fills
Electricity current sampling circuit composition；
The outfan of described charging voltage sample circuit is connected with the first input end of described MCU controller,
The outfan of described charge current sample circuit is connected with the second input of described MCU controller, described
The outfan of bleeder circuit is connected with the 3rd input of described MCU controller, described MCU controller
Outfan be connected with the MPPTSET end of described MPPT control circuit；
Described charging voltage sample circuit and described charge current sample circuit, for by described accumulator
Charging voltage and charging current are uploaded to described MCU controller, for described MCU controller according to institute
State charging voltage and the current charge power of the charging current described accumulator of calculating, and in described current charging
When power is not reaching to charge power maximum corresponding to Current Temperatures environment, described MCU controller passes through
Regulate the ratio of the output valve of its outfan and the input value of the 3rd input, so that charge control module is adjusted
The output voltage of node solar battery plate, until the charge power of described accumulator reaches Current Temperatures environment
Corresponding charge power maximum.
MPPT the most according to claim 1 regulates circuit, it is characterised in that described MCU is controlled
Device processed, the AD input module including control unit and being connected with described control unit, the 2nd AD
Input module, the 3rd AD input module and DA output module；
A described AD input module is connected with the outfan of described charging voltage sample circuit, and described
Two AD input modules are connected with the outfan of described charge current sample circuit, and described 3rd AD inputs mould
Block is connected with the outfan of described bleeder circuit, described DA output module and described MPPT control circuit
MPPTSET end connect.
MPPT the most according to claim 1 regulates circuit, it is characterised in that described bleeder circuit
It is made up of the first resistance and the second resistance, the first end of described first resistance and described solar panel
Positive pole is connected, and the second end of described first resistance is connected with the first end of described second resistance, described
Second end of the second resistance is connected with the negative pole of described solar panel, and described first resistance is with described
The junction point of the second resistance is as the outfan of described bleeder circuit.
MPPT the most according to claim 1 regulates circuit, it is characterised in that described charging current
Sample circuit uses current sense amplifier to realize.
5. regulate circuit according to the MPPT described in any one of claim 1-4, it is characterised in that described
MPPT control circuit is the MPPT control circuit using BQ24650 chip to realize.
6. the MPPT regulation regulating circuit based on the MPPT as described in any one of Claims 1 to 5
Method, it is characterised in that the method includes:
Described charging voltage sample circuit, charge current sample circuit gather the charging of described accumulator respectively
Voltage and charging current, and it is uploaded to described MCU controller；
Described MCU controller calculates the current of described accumulator according to described charging voltage and charging current
Charge power, and judge described current charge power be whether charge power that Current Temperatures environment is corresponding
Big value；
If current charge power is not the charge power maximum that Current Temperatures environment is corresponding, the most described MCU
Controller is by the ratio of the input value of the output valve Yu the 3rd input that regulate its outfan, so that charging
The output voltage of control module regulation solar panel, until the charge power of described accumulator reaches to work as
The charge power maximum that front temperature environment is corresponding.
MPPT control method the most according to claim 6, it is characterised in that described in described judgement
Whether current charge power is the charge power maximum that Current Temperatures environment is corresponding, including:
Described MCU controller by the output valve Yu described MCU controller that regulate its outfan the 3rd
The ratio of the input value of input, it is judged that after ratio regulation, whether the charge power of described accumulator is more than institute
State the current charge power of accumulator, if, it is determined that described current charge power is not Current Temperatures ring
The charge power maximum that border is corresponding.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610556303.0A CN106020328B (en) | 2016-07-15 | 2016-07-15 | A kind of MPPT adjusts circuit and adjusting method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610556303.0A CN106020328B (en) | 2016-07-15 | 2016-07-15 | A kind of MPPT adjusts circuit and adjusting method |
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| CN106020328B CN106020328B (en) | 2018-04-20 |
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| CN201610556303.0A Active CN106020328B (en) | 2016-07-15 | 2016-07-15 | A kind of MPPT adjusts circuit and adjusting method |
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| CN107800184A (en) * | 2017-11-10 | 2018-03-13 | 湖南省保利光电科技有限责任公司 | A kind of quasi- MPPT charging devices for small-sized 12V photovoltaic applications system |
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| CN106020328B (en) | 2018-04-20 |
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