CN107992154A - A kind of maximum power tracking method and device - Google Patents
A kind of maximum power tracking method and device Download PDFInfo
- Publication number
- CN107992154A CN107992154A CN201711367430.7A CN201711367430A CN107992154A CN 107992154 A CN107992154 A CN 107992154A CN 201711367430 A CN201711367430 A CN 201711367430A CN 107992154 A CN107992154 A CN 107992154A
- Authority
- CN
- China
- Prior art keywords
- voltages
- mppt
- output power
- power
- base
- Prior art date
- Legal status (The legal status 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 status listed.)
- Granted
Links
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
-
- 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
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Landscapes
- Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Power Engineering (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Control Of Electrical Variables (AREA)
Abstract
The application, which provides a kind of maximum power tracking method and device, method, to be included：Output power and PV voltages according to setpoint frequency monitoring solar panel；The adjusting step base of PV voltages is calculated in output power and PV voltages according to the solar panel monitored；Output power and default minimum power adjusted value that output power, last time according to this solar cell detect adjust the count value of MPPT；According to the comparative result of the count value and setting MPPT reference values of the MPPT after adjustment, keynote section PV reference voltages are walked based on adjusting；Control targe using the PV reference voltages as rear class power circuit.Realize the purpose for the power oscillation for reducing MPPT maximal power tracings.
Description
Technical field
The present invention relates to technical field of photovoltaic power generation equipment, and in particular to a kind of maximum power tracking method and device.
Background technology
Our times photovoltaic generation proportion is increasing, and the lifting of the utilization rate and efficiency of solar energy has whole industry
Great meaning.Due to the working characteristics of photovoltaic panel, plus the difference of various regions operating condition, the change of sunlight power etc., is
It is particularly important that improving the utilization rate of solar energy, tracking the peak power output operating point of photovoltaic panel.
Current tracking technique most common in the industry is disturbance observation method, and this method is by by this solar panel
Output power compared with last time relatively come determine to increase or decrease solar panel operating voltage Δ V realize maximum power point with
Track (Maximum Power Point Tracking, hereinafter referred to as MPPT).For Δ V, if the value of Δ V is bigger than normal, solar energy
The output of solar panel can float in maximum power point or so, can produce larger concussion；If the value of Δ V is less than normal, although can be with
Ensure tracking accuracy, but need more times, effect can be deteriorated when maximum power point change is frequent, both are difficult at performance
Take into account.Accordingly, it is desirable to provide more effectively track algorithm can improve control accuracy, reduce power oscillation also can guarantee that at the same time with
Track speed.
The content of the invention
In view of this, the embodiment of the present invention provides a kind of maximum power tracking method and device, and a kind of energy is provided to realize
Enough effectively reduce the track algorithm of power oscillation.
To achieve the above object, the embodiment of the present invention provides following technical solution：
A kind of maximum power tracking method, including：
Output power and PV voltages according to setpoint frequency monitoring solar panel；
The adjusting step base of PV voltages is calculated in output power and PV voltages according to the solar panel monitored；
The output power and default minimum power tune that output power, last time according to this solar cell detect
Whole value adjusts the count value of MPPT；
According to the comparative result of the count value and setting MPPT reference values of the MPPT after adjustment, based on adjusting step keynote section PV
Reference voltage；
Control targe using the PV reference voltages as rear class power circuit.
Preferably, in above-mentioned maximum power tracking method, the output power for the solar panel that the foundation monitors and
The adjusting step base of PV voltages is calculated in PV voltages, specifically includes：
The defeated of the solar cell that this output power for monitoring obtained solar cell was monitored with last time is calculated
Go out the difference between power；
The PV voltages for the solar cell that this monitoring obtains and the PV electricity of the solar cell of last time monitoring is calculated
Difference between pressure；
The adjusting of PV voltages is obtained according to the mathematic interpolation between the difference between the output power and the PV voltages
Walk base.
Preferably, in above-mentioned maximum power tracking method, the difference according between the output power and the PV
Mathematic interpolation between voltage obtains the adjusting step base of PV voltages, including：
The logarithm using m the bottom of as will be sought after output power difference divided by PV voltage differences, result of calculation is then amplified into n again
Times, nonce is adjusted using n times of later numerical value of amplification as PV voltages, the PV voltages are adjusted into nonce as PV voltages
Step base is adjusted, the m and n are default value.
Preferably, it is described that the PV voltages are adjusted into nonce as PV voltages in above-mentioned maximum power tracking method
Step base is adjusted, is specifically included：
Judge that the PV voltages adjust whether nonce is less than minimum default step base, if so, the default step base of minimum is made
Base is walked for the adjusting of the PV voltages；
When the PV voltages adjust nonce not less than the minimum default step base, it is interim to judge that the PV voltages are adjusted
Whether value is more than maximum preset step base, if so, base is walked using maximum preset step base as the adjusting of PV voltages, otherwise, will
The PV voltages adjust nonce and walk base as the adjusting of PV voltages.
Preferably, in above-mentioned maximum power tracking method, the output power according to this solar cell, last time are examined
The output power measured and default minimum power adjusted value adjust the count value of MPPT, including：
If the output power of this solar cell is more than output power and the default minimum power tune that last time detects
The sum of whole value, also, the PV voltages that this PV voltage monitored was monitored more than last time, then increase the count value of MPPT；
If the output power of this solar cell is more than output power and the default minimum power tune that last time detects
The sum of whole value, also, the PV voltages that this PV voltage monitored was monitored less than last time, then reduce the count value of MPPT；
If the sum of the output power of this solar cell and default minimum power adjusted value are less than what last time detected
Output power, also, the PV voltages that this PV voltage monitored was monitored more than last time, then reduce the count value of MPPT；
If the sum of the output power of this solar cell and default minimum power adjusted value are less than what last time detected
Output power, also, the PV voltages that this PV voltage monitored was monitored less than last time, then increase the count value of MPPT.
Preferably, in above-mentioned maximum power tracking method, count value and the setting MPPT of the MPPT according to after adjustment
The comparative result of reference value, keynote section PV reference voltages are walked based on described adjust, including：
If the MPPT count values after adjustment are more than setting MPPT reference values, PV reference voltages increase the I times of adjusting step
Base；
If the MPPT count values after adjustment are less than setting MPPT reference values and described more than k times of 0, PV reference voltages increase
Adjust step base；
If the MPPT count values after adjustment are more than negative setting MPPT reference values and reduce k times less than 0, PV reference voltages
It is described to adjust step base；
If the MPPT count values after adjustment are less than negative setting MPPT reference values, PV reference voltages reduce I times and adjust step
Base；
Wherein, the I and k are default value.
A kind of maximum power tracking device, including：
Detection unit, for the output power and PV voltages according to setpoint frequency monitoring solar panel；
Base adjustment unit is walked, PV electricity is calculated for the output power according to the solar panel monitored and PV voltages
The adjusting step base of pressure；
The count value adjustment unit of MPPT, detected defeated for the output power according to this solar cell, last time
Go out power and default minimum power adjusted value adjusts the count value of MPPT；
PV reference voltage adjustment units, for the comparative result of the count value according to MPPT and setting MPPT reference values, base
Step keynote section PV reference voltages, the control targe using the PV reference voltages as rear class power circuit are adjusted in described.
Preferably, in above-mentioned maximum power tracking device, the step base adjustment unit, is specifically used for：
The defeated of the solar cell that this output power for monitoring obtained solar cell was monitored with last time is calculated
Go out the difference between power；
The PV voltages for the solar cell that this monitoring obtains and the PV electricity of the solar cell of last time monitoring is calculated
Difference between pressure；
The adjusting of PV voltages is obtained according to the mathematic interpolation between the difference between the output power and the PV voltages
Walk base.
Preferably, in above-mentioned maximum power tracking device, the step base adjustment unit is according between the output power
Difference and PV voltages between mathematic interpolation obtain PV voltages adjusting step base when, be specifically used for：
The logarithm using m the bottom of as will be sought after output power difference divided by PV voltage differences, result of calculation is then amplified into n again
Times, nonce is adjusted using n times of later numerical value of amplification as PV voltages, the PV voltages are adjusted into nonce as PV voltages
Step base is adjusted, the m and n are default value.
Preferably, in above-mentioned maximum power tracking device, the step base adjustment unit is adjusted temporarily by the PV voltages
When being worth the adjusting step base as PV voltages, it is specifically used for：
Judge that the PV voltages adjust whether nonce is less than minimum default step base, if so, the default step base of minimum is made
Base is walked for the adjusting of the PV voltages；
When the PV voltages adjust nonce not less than the minimum default step base, it is interim to judge that the PV voltages are adjusted
Whether value is more than maximum preset step base, if so, base is walked using maximum preset step base as the adjusting of PV voltages, otherwise, will
The PV voltages adjust nonce and walk base as the adjusting of PV voltages.
Based on above-mentioned technical proposal, such scheme provided by the invention, according to the defeated of setpoint frequency monitoring solar panel
Go out power and PV voltages；The adjusting step of PV voltages is calculated in output power and PV voltages according to the solar panel monitored
Base；The output power and default minimum power adjusted value that output power, last time according to this solar cell detect
Adjust the count value of MPPT；According to the comparative result of the count value and setting MPPT reference values of the MPPT after adjustment, based on described
Adjust step keynote section PV reference voltages；Control targe using the PV reference voltages as rear class power circuit.Reduce MPPT
The power oscillation of maximal power tracing.
Brief description of the drawings
In order to illustrate more clearly about the embodiment of the present invention or technical scheme of the prior art, below will be to embodiment or existing
There is attached drawing needed in technology description to be briefly described, it should be apparent that, drawings in the following description are only this
The embodiment of invention, for those of ordinary skill in the art, without creative efforts, can also basis
The attached drawing of offer obtains other attached drawings.
Fig. 1 is a kind of flow diagram of maximum power tracking method disclosed in the embodiment of the present application；
Fig. 2 is that the embodiment of the present application determines that PV voltages adjust the idiographic flow schematic diagram of step base；
Fig. 3 is the flow diagram that the embodiment of the present application adjusts MPPT count values；
Fig. 4 is the flow diagram that the embodiment of the present application adjusts PV reference voltages；
Fig. 5 is a kind of structure diagram of maximum power tracking device disclosed in the embodiment of the present application.
Embodiment
Below in conjunction with the attached drawing in the embodiment of the present invention, the technical solution in the embodiment of the present invention is carried out clear, complete
Site preparation describes, it is clear that described embodiment is only part of the embodiment of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, those of ordinary skill in the art are obtained every other without making creative work
Embodiment, belongs to the scope of protection of the invention.
The problem of being directed in above-mentioned background technology, this application provides it is a kind of more effectively maximum power tracking method and
Device, can be applied in photovoltaic generating system, and this method can reduce the power oscillation of MPPT maximal power tracings, can provide more
Effective track algorithm is allowed to that control accuracy can be improved, and reduces power oscillation and also can guarantee that tracking velocity at the same time.
Referring to Fig. 1, the above method can include：
Step S101：Determine the adjusting step base of PV voltages；
In this step, the output power and PV voltages according to setpoint frequency monitoring solar panel, monitored according to last time
The output power and PV for the solar cell that the output power and PV voltages of obtained solar cell and this monitoring obtain
Voltage, is calculated both output power differences and PV voltage differences, based on the output power difference and PV voltages
Mathematic interpolation obtains the adjusting step base of PV voltages, specifically, can specifically lead in technical solution disclosed in the embodiment of the present application
Cross the adjusting step base that PV voltages are calculated using following methods：To be asked after output power difference divided by PV voltage differences using m as
The logarithm at bottom, then amplifies n times by result of calculation again, will amplify n times of later numerical value and walks base as the adjusting of PV voltages, wherein
The size of the n can be according to user demand sets itself, for example, it can be the Any Digits such as 2,3,4.
Specifically, referring to Fig. 2, determining the idiographic flow of the adjusting step base of PV voltages can include：
Step S201：The output power P of this solar cell monitored is calculatedpreMonitored too with last time
The output power P of positive energy batterylastBetween difference △ P, i.e. △ P=Ppre-Plast；
Step S202：The PV voltages V of this solar cell monitored is calculatedpreThe sun monitored with last time
The PV voltages V of energy batterylastBetween difference △ V, i.e. △ V=Vpre-Vlast；
Step S203：The absolute value △ T of the ratio between △ P and △ V are calculated,
That is △ T=| △ P/ △ V |；
Step S204：According to formula VTstep=n*logm△ T, are calculated PV voltages and adjust nonce VTstep, at this time may be used
The PV voltages are adjusted nonce VTstepAdjusting step base V as PV voltagesstep；
In order to further improve control accuracy, can also include after step S204：
Step S205：Judge that the PV voltages adjust nonce VTstepWhether minimum default step base V is less thanSmin, if so,
Step S206 is performed, otherwise, performs step S207；
Step S206：By the minimum default step base VSminNonce VT is adjusted as PV voltagesstep, perform step S209；
Step S207：Judge that the PV voltages adjust nonce VTstepWhether maximum preset step base V is more thanSmax, if so,
Step S208 is performed, otherwise, keeps PV voltages to adjust nonce VTstepValue constant perform step S209；
Step S208：By maximum preset step base VSmaxNonce VT is adjusted as PV voltagesstep, perform step S209；
Step S209：PV voltages are adjusted into nonce VTstepAdjusting step base V as PV voltagesstep。
Wherein, PpreRepresent this output power, PlastRepresent last time output power, VpreRepresent this PV voltage, VlastTable
Show last time PV voltage, VTstepRepresent that PV voltages adjust nonce, VstepRepresent that PV voltages adjust step base, n takes the logarithm function
Multiple, the value generally take 5 to 10.M is the truth of a matter of logarithmic function, which generally takes 10.VSminIt is most small step base limit value, VSmax
It is maximum step base limit value, general minimum value is less than 1V, and maximum is from a few V to 10V etc..
Step S102：Output power that output power, last time according to this solar cell detect and default
Minimum power adjusted value adjusts the count value of MPPT；
In this step, if the output power of this solar cell be more than the output power that detects of last time with it is default most
The sum of small-power adjusted value, also, the PV voltages that this PV voltage monitored was monitored more than last time, then increase the meter of MPPT
Numerical value.If the output power of this solar cell is more than output power and the default minimum power adjusted value that last time detects
The sum of, also, this PV voltage for monitoring is less than the PV voltages that last time monitors, then reduces the count value of MPPT.If this
The sum of the output power of solar cell and default minimum power adjusted value are less than the output power detected last time, also,
This PV voltage monitored is more than the PV voltages monitored last time, then reduces the count value of MPPT.If this solar cell
Output power and the sum of default minimum power adjusted value be less than the output power that last time detects, also, this is monitored
PV voltages be less than the PV voltages that monitor of last time, then increase the count value of MPPT.Wherein, the initial value of the MPPT can be according to
According to user demand sets itself.
Specifically, referring to Fig. 3, the idiographic flow of the step can include：
Step S301：Judge the output power P of this solar cell monitoredpreWhether default maximum work is less than
Rate limits value Plimit, if so, performing step S302；
Step S302：Judge the output power P of this solar cellpreWhether the output that detects of last time is more than or equal to
Power PlastThe sum of with default minimum power adjusted value δ P, if so, performing step S303, otherwise perform step S304；
Step S303：Judge this PV voltages V monitoredpreWhether the PV voltages V that monitors of last time is more than or equal tolast,
If so, performing step S307, step S308 is otherwise performed；
Step S304：Judge the output power P of this solar cellpreThe sum of with default minimum power adjusted value δ P
Whether the output power P that detects of last time is less thanlast, if so, performing step S305；
Step S305：Judge this PV voltages V monitoredpreWhether the PV voltages V that monitors of last time is more than or equal tolast,
If so, performing step S308, step S307 is otherwise performed；
Step S307：Increase the count value of MPPT；
Step S308：Reduce the count value of MPPT.
Step S103：PV reference voltages are adjusted to follow the trail of maximum power output.
In this step, the size of calculating and more current MPPT count values and setting MPPT reference values, if current MPPT
Count value is more than setting MPPT reference values, then PV reference voltages increase the adjusting step base being calculated in I times of step S101, if working as
Preceding MPPT count values are less than setting MPPT reference values and more than 0, then PV reference voltages increase what is be calculated in k times of step S101
Step base is adjusted, the value of the k can be set according to user demand.If current MPPT count values are more than negative setting MPPT ginsengs
Examine value and less than 0, then PV reference voltages reduce the adjusting step base being calculated in k times of step S101.If current MPPT count values
Less than negative setting MPPT reference values, then the adjusting step base being calculated in I times of step S101 of PV reference voltages reduction.
Referring to Fig. 4, this step can specifically include：
Step S401：Judge whether current MPPT count values MCt is more than or equal to setting MPPT reference value MCtRef, if
It is to perform step S402, otherwise performs step S404；
Step S402：So that the value of current MPPT count values MCt is 0, step S403 is performed；
Step S403：PV reference voltages VrefThe adjusting step base V being calculated in I times of step S101 of increasestep, perform step
Rapid S104；
Step S404：Judge whether current MPPT count values MCt is less than negative setting MPPT reference value MCtRef, if
It is to perform step S405, otherwise performs step S407；
Step S405：So that the value of current MPPT count values MCt is 0, step S406 is performed；
Step S406：PV reference voltages VrefReduce the adjusting step base V being calculated in I times of step S101step, perform step
Rapid S104；
Step S407：Judge whether the value of current MPPT count values MCt is more than 0, if so, step S408 is performed, otherwise,
Perform step S409；
Step S408：PV reference voltages VrefThe adjusting step base V being calculated in k times of step S101 of increasestep, perform step
Rapid S104；
Step S409：PV reference voltages VrefReduce the adjusting step base V being calculated in k times of step S101step, perform step
Rapid S104.
Wherein, MCt represents Mppt program circuit current count values, and MCtRef represents the count value reference value of setting, described
The value of MCtRef generally takes 5 to 10.I and k be walk base disturbance coefficient, I ordinary circumstances take 1, k value ranges 0 to 1 it
Between.
Step S104：Control targe using PV reference voltages as rear class power circuit；
In this step, reference value PV reference voltage levels calculated as rear class power output circuit loop, makes to pass through
The control mode for adjusting rear class power circuit changes PV reference voltages, reaches the reference value of demand.So as to fulfill MPPT functions.
The above method disclosed in the embodiment of the present application, since solar cell P-V curves are nonlinear, this method passes through
The opposite change for calculating output power and PV voltages uses logarithmic function dynamic analog P-V curves, the adjusting of PV voltages is walked base
It is corresponding with actual P-V curves, so follow the trail of power and more stablize certainly, precision higher, can reduce MPPT maximal power tracings
Power oscillation, improve the precision of maximal power tracing.When it is applied in solar power system, in solar panels light
Intensity of illumination when changing, the maximum power output of solar panel can smoothly change relatively, steady in intensity of illumination
Periodically, output power changes very little.So as to improve MPPT overall efficiencies, improve solar energy utilization ratio.
Corresponding to the above method, disclosed herein as well is a kind of maximum power tracking device, the technology in method and apparatus
Scheme can be used for reference mutually, which can be microprocessor or other process chips, can be integrated with referring to Fig. 5, inside it：
Detection unit 100, it is corresponding with step S101 in the above method, for according to setpoint frequency monitoring solar energy face
The output power and PV voltages of plate；
Base adjustment unit 200 is walked, it is corresponding with step S101 in the above method, for according to the solar energy face monitored
The adjusting step base of PV voltages is calculated in the output power and PV voltages of plate；
The count value adjustment unit 300 of MPPT, it is corresponding with step S102 in the above method, for according to this sun
Output power and default minimum power adjusted value that the output power of energy battery, last time detect adjust the counting of MPPT
Value；
PV reference voltages adjustment unit 400, it is corresponding with step S103 and S104 in the above method, for according to MPPT
Count value with setting MPPT reference values comparative result, based on it is described adjust step keynote section PV reference voltages, the PV is joined
Examine control targe of the voltage as rear class power circuit.
Corresponding with the above method, the step base adjustment unit 200, is specifically used for：
The defeated of the solar cell that this output power for monitoring obtained solar cell was monitored with last time is calculated
Go out the difference between power；
The PV voltages for the solar cell that this monitoring obtains and the PV electricity of the solar cell of last time monitoring is calculated
Difference between pressure；
The adjusting that PV voltages are obtained according to the mathematic interpolation between the difference between the output power and PV voltages walks base.
Corresponding with the above method, the step base adjustment unit 200 is according to the difference and PV between the output power
When mathematic interpolation between voltage obtains the adjusting step base of PV voltages, it is specifically used for：
The logarithm using m the bottom of as will be sought after output power difference divided by PV voltage differences, result of calculation is then amplified into n again
Times, amplification is obtained into PV voltages adjusting nonce for n times later, the PV voltages are adjusted nonce walks as the adjusting of PV voltages
Base.
Corresponding with the above method, the step base adjustment unit 200, is additionally operable to：
Judge that whether the PV voltages adjust nonce less than the default step base of minimum, if so, minimum preset is walked
Base adjusts nonce as PV voltages, if not, continuing to judge that the PV voltages adjust whether nonce is more than maximum preset step
Base, if so, adjusting nonce using maximum preset step base as PV voltages, otherwise, keeps PV voltages to adjust nonce
It is worth constant；
PV voltages are adjusted into nonce and walk base as the adjusting of PV voltages.
Corresponding with the method, the PV reference voltages adjustment unit 400 is in the output according to this solar cell
Comparative result increase or reduction MPPT between output power and default minimum power adjusted value that power, last time detect
Count value when, be specifically used for：
If the output power of this solar cell is more than output power and the default least work for being equal to that last time detects
The sum of rate adjusted value, also, the PV voltages that this PV voltage monitored was monitored more than or equal to last time, then increase the meter of MPPT
Numerical value；
If the output power of this solar cell is more than output power and the default least work for being equal to that last time detects
The sum of rate adjusted value, also, the PV voltages that this PV voltage monitored was monitored less than last time, then reduce the counting of MPPT
Value；
If the sum of the output power of this solar cell and default minimum power adjusted value are less than what last time detected
Output power, also, the PV voltages that this PV voltage monitored was monitored more than or equal to last time, then reduce the counting of MPPT
Value；
If the sum of the output power of this solar cell and default minimum power adjusted value are less than what last time detected
Output power, also, the PV voltages that this PV voltage monitored was monitored less than last time, then increase the count value of MPPT.
Corresponding with the above method, the PV reference voltages adjustment unit 400 is in the count value according to the MPPT after adjusting
Comparative result with setting MPPT reference values, adjusts step keynote section PV reference voltages based on described, is specifically used for：
If the MPPT count values after adjustment are more than setting MPPT reference values, PV reference voltages increase the I times of adjusting step
Base；
If the MPPT count values after adjustment are less than setting MPPT reference values and described more than k times of 0, PV reference voltages increase
Adjust step base；
If the MPPT count values after adjustment are more than negative setting MPPT reference values and reduce k times less than 0, PV reference voltages
It is described to adjust step base；
If the MPPT count values after adjustment are less than negative MPPT reference values, PV reference voltages reduce I times and adjust step base；
Wherein, the I and k are default value.
For convenience of description, it is divided into various modules during description system above with function to describe respectively.Certainly, this is being implemented
The function of each module can be realized in same or multiple softwares and/or hardware during application.
Each embodiment in this specification is described by the way of progressive, identical similar portion between each embodiment
Divide mutually referring to what each embodiment stressed is the difference with other embodiment.Especially for system or
For system embodiment, since it is substantially similar to embodiment of the method, so describing fairly simple, related part is referring to method
The part explanation of embodiment.Method and device embodiment described above is only schematical, wherein the conduct
The unit that separating component illustrates may or may not be it is physically separate, can be as the component that unit is shown or
Person may not be physical location, you can with positioned at a place, or can also be distributed in multiple network unit.Can root
Factually border needs to select some or all of module therein realize the purpose of this embodiment scheme.Ordinary skill
Personnel are without creative efforts, you can to understand and implement.
Professional further appreciates that, with reference to each exemplary unit of the embodiments described herein description
And algorithm steps, can be realized with electronic hardware, computer software or the combination of the two, in order to clearly demonstrate hardware and
The interchangeability of software, generally describes each exemplary composition and step according to function in the above description.These
Function is performed with hardware or software mode actually, application-specific and design constraint depending on technical solution.Specialty
Technical staff can realize described function to each specific application using distinct methods, but this realization should not
Think beyond the scope of this invention.
Can directly it be held with reference to the step of method or algorithm that the embodiments described herein describes with hardware, processor
Capable software module, or the two combination are implemented.Software module can be placed in random access memory (RAM), memory, read-only deposit
Reservoir (ROM), electrically programmable ROM, electrically erasable ROM, register, hard disk, moveable magnetic disc, CD-ROM or technology
In any other form of storage medium well known in field.
It should also be noted that, herein, relational terms such as first and second and the like are used merely to one
Entity or operation are distinguished with another entity or operation, without necessarily requiring or implying between these entities or operation
There are any actual relationship or order.Moreover, term " comprising ", "comprising" or its any other variant are intended to contain
Lid non-exclusive inclusion, so that process, method, article or equipment including a series of elements not only will including those
Element, but also including other elements that are not explicitly listed, or further include as this process, method, article or equipment
Intrinsic key element.In the absence of more restrictions, the key element limited by sentence "including a ...", it is not excluded that
Also there are other identical element in process, method, article or equipment including the key element.
The foregoing description of the disclosed embodiments, enables professional and technical personnel in the field to realize or use the present invention.
A variety of modifications to these embodiments will be apparent for those skilled in the art, as defined herein
General Principle can be realized in other embodiments without departing from the spirit or scope of the present invention.Therefore, it is of the invention
The embodiments shown herein is not intended to be limited to, and is to fit to and the principles and novel features disclosed herein phase one
The most wide scope caused.
Claims (10)
- A kind of 1. maximum power tracking method, it is characterised in that including：Output power and PV voltages according to setpoint frequency monitoring solar panel；The adjusting step base of PV voltages is calculated in output power and PV voltages according to the solar panel monitored；The output power and default minimum power adjusted value that output power, last time according to this solar cell detect Adjust the count value of MPPT；According to the comparative result of the count value and setting MPPT reference values of the MPPT after adjustment, based on adjusting step keynote section PV references Voltage；Control targe using the PV reference voltages as rear class power circuit.
- 2. maximum power tracking method according to claim 1, it is characterised in that the solar energy face that the foundation monitors The adjusting step base of PV voltages is calculated in the output power and PV voltages of plate, specifically includes：The output work of the output power and the solar cell of last time monitoring of the solar cell that this monitoring obtains is calculated Difference between rate；Be calculated PV voltages of solar cell that this monitoring obtains and the solar cell of last time monitoring PV voltages it Between difference；The adjusting that PV voltages are obtained according to the mathematic interpolation between the difference between the output power and the PV voltages walks base.
- 3. maximum power tracking method according to claim 2, it is characterised in that described according between the output power Difference and the PV voltages between mathematic interpolation obtain PV voltages adjusting step base, including：The logarithm using m the bottom of as will be sought after output power difference divided by PV voltage differences, result of calculation is then amplified n times again, will Amplify n times of later numerical value and adjust nonce as PV voltages, the PV voltages are adjusted into adjusting of the nonce as PV voltages Base is walked, the m and n are default value.
- 4. maximum power tracking method according to claim 3, it is characterised in that described to adjust the PV voltages temporarily It is worth and walks base as the adjusting of PV voltages, specifically includes：Judge that the PV voltages adjust whether nonce is less than minimum default step base, if so, using the default step base of minimum as institute State the adjusting step base of PV voltages；When the PV voltages adjust nonce not less than the minimum default step base, judge that the PV voltages adjust nonce and are It is no to be more than maximum preset step base, if so, base is walked using maximum preset step base as the adjusting of PV voltages, otherwise, by described in PV voltages adjust nonce and walk base as the adjusting of PV voltages.
- 5. maximum power tracking method according to claim 1, it is characterised in that described according to this solar cell Output power and default minimum power adjusted value that output power, last time detect adjust the count value of MPPT, including：If the output power of this solar cell is more than output power and the default minimum power adjusted value that last time detects The sum of, also, this PV voltage for monitoring is more than the PV voltages that last time monitors, then increases the count value of MPPT；If the output power of this solar cell is more than output power and the default minimum power adjusted value that last time detects The sum of, also, this PV voltage for monitoring is less than the PV voltages that last time monitors, then reduces the count value of MPPT；If the sum of the output power of this solar cell and default minimum power adjusted value are less than the output detected last time Power, also, the PV voltages that this PV voltage monitored was monitored more than last time, then reduce the count value of MPPT；If the sum of the output power of this solar cell and default minimum power adjusted value are less than the output detected last time Power, also, the PV voltages that this PV voltage monitored was monitored less than last time, then increase the count value of MPPT.
- 6. maximum power tracking method according to claim 1, it is characterised in that the meter of the MPPT according to after adjustment Numerical value and the comparative result of setting MPPT reference values, keynote section PV reference voltages are walked based on described adjust, including：If the MPPT count values after adjustment are more than setting MPPT reference values, PV reference voltages increase the I times of adjusting step base；If the MPPT count values after adjustment are less than setting MPPT reference values and increase the k times of adjusting more than 0, PV reference voltages Walk base；If the MPPT count values after adjustment are more than negative setting MPPT reference values and described less than k times of 0, PV reference voltages reduction Adjust step base；If the MPPT count values after adjustment are less than negative setting MPPT reference values, PV reference voltages reduce I times and adjust step base；Wherein, the I and k are default value.
- A kind of 7. maximum power tracking device, it is characterised in that including：Detection unit, for the output power and PV voltages according to setpoint frequency monitoring solar panel；Base adjustment unit is walked, PV voltages are calculated for the output power according to the solar panel monitored and PV voltages Adjust step base；The count value adjustment unit of MPPT, the output work detected for the output power according to this solar cell, last time Rate and default minimum power adjusted value adjust the count value of MPPT；PV reference voltage adjustment units, for the comparative result of the count value according to MPPT and setting MPPT reference values, based on institute State adjusting step keynote section PV reference voltages, the control targe using the PV reference voltages as rear class power circuit.
- 8. maximum power tracking device according to claim 1, it is characterised in that the step base adjustment unit is specific to use In：The output work of the output power and the solar cell of last time monitoring of the solar cell that this monitoring obtains is calculated Difference between rate；Be calculated PV voltages of solar cell that this monitoring obtains and the solar cell of last time monitoring PV voltages it Between difference；The adjusting that PV voltages are obtained according to the mathematic interpolation between the difference between the output power and the PV voltages walks base.
- 9. maximum power tracking device according to claim 8, it is characterised in that the step base adjustment unit is according to institute State the mathematic interpolation between the difference between output power and PV voltages obtain PV voltages adjusting step base when, be specifically used for：The logarithm using m the bottom of as will be sought after output power difference divided by PV voltage differences, result of calculation is then amplified n times again, will Amplify n times of later numerical value and adjust nonce as PV voltages, the PV voltages are adjusted into adjusting of the nonce as PV voltages Base is walked, the m and n are default value.
- 10. maximum power tracking device according to claim 9, it is characterised in that the step base adjustment unit is by institute When stating adjusting step base of the PV voltages adjusting nonce as PV voltages, it is specifically used for：Judge that the PV voltages adjust whether nonce is less than minimum default step base, if so, using the default step base of minimum as institute State the adjusting step base of PV voltages；When the PV voltages adjust nonce not less than the minimum default step base, judge that the PV voltages adjust nonce and are It is no to be more than maximum preset step base, if so, base is walked using maximum preset step base as the adjusting of PV voltages, otherwise, by described in PV voltages adjust nonce and walk base as the adjusting of PV voltages.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711367430.7A CN107992154B (en) | 2017-12-18 | 2017-12-18 | Maximum power tracking method and device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711367430.7A CN107992154B (en) | 2017-12-18 | 2017-12-18 | Maximum power tracking method and device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107992154A true CN107992154A (en) | 2018-05-04 |
| CN107992154B CN107992154B (en) | 2020-02-04 |
Family
ID=62037760
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711367430.7A Active CN107992154B (en) | 2017-12-18 | 2017-12-18 | Maximum power tracking method and device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107992154B (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420548A (en) * | 2011-12-27 | 2012-04-18 | 东莞市凯登能源科技有限公司 | Method, device and system for searching six-level power |
| CN102609030A (en) * | 2012-03-15 | 2012-07-25 | 大连海事大学 | Maximum power point tracking device of marine photovoltaic power generation system |
| CN103744468A (en) * | 2014-01-09 | 2014-04-23 | 华中科技大学 | Variable-step photovoltaic MPPT (Maximum Power Point Tracking) control method based on angle of contingence |
| CN103955253A (en) * | 2014-05-05 | 2014-07-30 | 合肥工业大学 | Power closed-loop scanning-based maximum power point tracking method for multiple peak values of photovoltaic array |
| CN107168450A (en) * | 2017-06-14 | 2017-09-15 | 刘博文 | A kind of solar energy power generating MPPT maximum power point tracking control system and method |
-
2017
- 2017-12-18 CN CN201711367430.7A patent/CN107992154B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102420548A (en) * | 2011-12-27 | 2012-04-18 | 东莞市凯登能源科技有限公司 | Method, device and system for searching six-level power |
| CN102609030A (en) * | 2012-03-15 | 2012-07-25 | 大连海事大学 | Maximum power point tracking device of marine photovoltaic power generation system |
| CN103744468A (en) * | 2014-01-09 | 2014-04-23 | 华中科技大学 | Variable-step photovoltaic MPPT (Maximum Power Point Tracking) control method based on angle of contingence |
| CN103955253A (en) * | 2014-05-05 | 2014-07-30 | 合肥工业大学 | Power closed-loop scanning-based maximum power point tracking method for multiple peak values of photovoltaic array |
| CN107168450A (en) * | 2017-06-14 | 2017-09-15 | 刘博文 | A kind of solar energy power generating MPPT maximum power point tracking control system and method |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107992154B (en) | 2020-02-04 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| Basaran et al. | Energy management for on‐grid and off‐grid wind/PV and battery hybrid systems | |
| Seyedmahmoudian et al. | Maximum power point tracking of partial shaded photovoltaic array using an evolutionary algorithm: A particle swarm optimization technique | |
| Yu et al. | Indoor light energy harvesting system for energy-aware wireless sensor node | |
| KR101973881B1 (en) | Method, device and system for compensating the output power of a wind turbine generator set | |
| Rajasekaran et al. | Bidirectional DC-DC converter for microgrid in energy management system | |
| Tingting Xu et al. | Impact of the COVID-19 pandemic on the reduction of electricity demand and the integration of renewable energy into the power grid | |
| KR20190023791A (en) | System and Method of Simplified Robust Optimal Operation of Microgrids by Band of Wirtual Equivalent Load Variation Considering the Uncertainty of Renewable Generation and Loads | |
| CN103762616A (en) | Hybrid energy storage photovoltaic power generation system based on power prediction method | |
| CN105048483A (en) | Energy-storage capacity configuration method and system for PV-containing power distribution network | |
| CN108448652A (en) | A kind of new energy and power grid cooperated power supply method and its calibration equipment | |
| Ding et al. | Stabilizing control strategy of complementary energy storage in renewable energy system | |
| Cho et al. | Enhanced frequency regulation service using hybrid energy storage system against increasing power-load variability | |
| CN105259971B (en) | A kind of MPPT algorithm of optimization | |
| CN102768555A (en) | High-efficiency mppt control strategy applicable to photovoltaic system | |
| US20200110115A1 (en) | Systems and methods for operating generators based on generator steady state stability limits | |
| JP6663831B2 (en) | Apparatus and method for designing capacity of power storage device and recording medium | |
| CN107992154A (en) | A kind of maximum power tracking method and device | |
| CN112383087B (en) | Photovoltaic under-power output control method | |
| CN106712103A (en) | Micro grid voltage stability control system and micro grid voltage stability control method | |
| CN103094902A (en) | Control method for real-time generating capacity of wind farm | |
| CN116454919B (en) | Method and system for judging frequency adjustment capability of wind power support system | |
| Wang et al. | Research on the impact of wind power integration on power system voltage stability | |
| Lim et al. | Heterogeneous Equipment Support Monitoring System for Operation and Maintenance of Solar power plant | |
| CN103580043A (en) | Energy storage charging and discharging control method for wind storage integrated system | |
| CN116231669A (en) | Data processing method, device, electronic equipment and storage medium |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |