CN105739595B - Maximum power point tracking device and method under photovoltaic generating system local shades - Google Patents
Maximum power point tracking device and method under photovoltaic generating system local shades Download PDFInfo
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- CN105739595B CN105739595B CN201610299073.4A CN201610299073A CN105739595B CN 105739595 B CN105739595 B CN 105739595B CN 201610299073 A CN201610299073 A CN 201610299073A CN 105739595 B CN105739595 B CN 105739595B
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- 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
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Abstract
The invention discloses maximum power point tracking device and its track algorithm under a kind of photovoltaic generating system local shades, method is specially when blocking does not occur in photovoltaic array, and maximum power point is searched rapidly using conductance increment method；When blocking occurs in photovoltaic array, the method constructs load line function first, using loading line function, operating point is set to jump out local optimum interval, then in conjunction with conductance increment method, each local interval maximum power point can be rapidly oriented, so as to realize the tracking of global maximum power point.Clear in structure of the present invention, definite functions, realization are convenient, are particularly suited for intensity of illumination and catastrophe occur, improve MPPT maximum power point tracking efficiency, reduce energy loss.
Description
Technical field
The present invention relates to maximum power point tracking device under a kind of photovoltaic generating system local shades, a kind of photovoltaic is further related to
Maximum power point tracing method under electricity generation system local shades, belongs to maximum power point tracking technology neck in photovoltaic generating system
Domain.
Background technology
In photovoltaic generating system, MPPT maximum power point tracking (Maximum Power Point Tracking, MPPT) is asked
Topic is one of problem that researcher pays close attention to the most, that is, keep system to be operated in the peak point of power curve, in maximum efficiency will too
Sun can be changed into electric energy.
In the case of intensity of sunshine and working temperature constant, its P-V characteristic curves existence anduniquess is most for photovoltaic module
It is high-power, but under the conditions of local shades, the battery of mismatch can consume remaining not only to component output without contribution
The energy that battery is produced, causes hot-spot, produces hot spot effect.When several photovoltaic modulies are connected into photovoltaic array, it is
Avoid producing " hot spot ", it is necessary in photovoltaic module two ends parallel connection bypass diode, when certain component is blocked, the pole of bypass two
Pipe is turned on, and varies widely the output characteristics of component, shows multi-peak characteristic.The multimodal of P-V curves under local shades
Value characteristic makes tracking of the system to maximum power point cause certain interference, and conventional MPPT algorithm can make system sink into part
Peak value and real maximum power point cannot be traced into, reduce utilization rate of the photovoltaic module to luminous energy, cause the output of system
Power is greatly lowered, and causes the wasting of resources.
The present invention proposes maximum power point tracking device and its tracking under a kind of photovoltaic generating system local shades,
According to designed apparatus and method, it is possible to resolve traditional tracking easily there is a problem of vibrating and be absorbed in local optimum, makes
System can be accurately tracked by global maximum power point, improve MPPT maximum power point tracking efficiency, reduce energy loss.
The content of the invention
It is an object of the invention to overcome deficiency of the prior art, there is provided under a kind of photovoltaic generating system local shades
Maximum power point tracking device and its tracking, solve traditional maximum power point tracking in the prior art and are easily absorbed in part most
Excellent technical problem.
In order to solve the above technical problems, the invention provides maximum power point under a kind of photovoltaic generating system local shades with
Track device, it is characterized in that, including multiple photovoltaic cells be composed in series photovoltaic array, for detect photovoltaic array output voltage electricity
The voltage and current detection circuit of flow valuve, the Boost translation circuits for adjusting photovoltaic array output voltage, for detect photovoltaic battle array
Arrange the intensity of illumination detection circuit of the illumination intensity value of output, block number for counting the statistics of the photovoltaic cells number that is blocked
Circuit, DSP single-chip microcomputers and host computer；
The output end of photovoltaic array connects the respective input of voltage and current detection circuit, voltage and current detection circuit it is defeated
Go out the corresponding analog quantity input of end connection DSP single-chip microcomputers；
The pwm signal output end of DSP single-chip microcomputers connects the input of Boost translation circuits by PWM drive circuit,
The output end connection photovoltaic array of Boost translation circuits；
The output end of photovoltaic array is also connected with the respective input that intensity of illumination detects circuit, intensity of illumination detection circuit
Output end connection statistics block the input of number circuit, and statistics blocks the phase of the output end connection DSP single-chip microcomputers of number circuit
Answer input；
DSP single-chip microcomputers realize both-way communication by communication interface and host computer；
Pwm signal of the DSP single-chip microcomputers according to be blocked photovoltaic cells number and the voltage x current value controlled output for receiving
Dutycycle, by Boost translation circuits adjust photovoltaic array output voltage, realize the MPPT maximum power point tracking of photovoltaic array
Control, while voltage x current value is uploaded into host computer.
Further, DSP single-chip microcomputers and the interface of upper machine communication are RS232 serial communication interfaces.
Further, also including signal processing circuit, the output end of voltage and current detection circuit passes through signal processing circuit
The analog input end of DSP single-chip microcomputers is connected, signal processing circuit is filtered treatment to voltage x current analog signal and level turns
Change.Signal processing circuit carries out transformation of scale using four operational amplifier LM324AN of low-power consumption, and four operational amplifiers are successively
Connect voltage-regulator diode after series connection, and then the analog signal voltage stabilizing that will be gathered is in 0-3.3V.
Further, intensity of illumination detection circuit uses intensity of illumination sensor, and statistics blocks number circuit to be included successively
The comparator unit of series connection, cell encoder and level conversion unit.
Further, DSP single-chip microcomputers use TMS320F28335.
Present invention also offers maximum power point tracing method under a kind of photovoltaic generating system local shades, it is characterized in that,
Comprise the following steps：
Step one, the photovoltaic cells number that is blocked according to collection judges whether photovoltaic array partial occlusion occurs, if individual
Number shows not to be blocked for 0, then carry out MPPT maximum power point tracking using conductance increment method, obtains the corresponding electricity of maximum power point
Pressure value is U, and performance number is P；Otherwise, into step 2；
Step 2, the photovoltaic cells number that is blocked according to collection builds load line function, follows the trail of maximum power point；Specifically
Process is：
S201) regulation photovoltaic array makes output voltage keep magnitude of voltage U, and now corresponding current value I is obtained after stabilization；
S202 the photovoltaic cells number N that is blocked) is obtained1, N1It is positive integer；
S203 relation between the crest number for) being exported according to photovoltaic array and the photovoltaic cells number that is blocked：N2=N1+ 1,
Obtain crest number N2；
S204) according to relation between load line function number and crest number：N3=N2- 1, obtain load line function number
N3；
S205 load line function) is built：VN=I × VOC×N/ISC, wherein：I by the value being calculated in step S201,
Expression block that magnitude of voltage at preceding maximum power point is corresponding and block after current value, VocIt is the open-circuit voltage of photovoltaic array,
IscIt is the short circuit current of photovoltaic array, N represents number of skips, and N=1,2......N3；
S206) started the cycle over up to N=N from N=13, in magnitude of voltage VNIn the range of maximum work is carried out using conductance increment method
Rate point is tracked, and obtains the corresponding performance number P of maximum power pointN；
S207) regulation photovoltaic array makes output voltage keep magnitude of voltageIn magnitude of voltageIn the range of use
Conductance increment method carries out MPPT maximum power point tracking, obtains the corresponding performance number of maximum power point
S208) chooseMiddle maximum is used as maximum power point.
Compared with prior art, the beneficial effect that is reached of the present invention is：
1) MPPT maximum power point tracking algorithm under local shades of the invention, when blocking does not occur in photovoltaic array, using electricity
Lead method of addition and search maximum power point rapidly；When blocking occurs in photovoltaic array, the method constructs load line function first,
Using line function is loaded, operating point is jumped out local optimum interval, then in conjunction with conductance increment method, can rapidly orient each
Local interval maximum power point, so as to realize the tracking of global maximum power point.Clear in structure of the present invention, definite functions, reality
Now facilitate, be particularly suited for intensity of illumination and catastrophe occur, improve MPPT maximum power point tracking efficiency, reduce energy damage
Lose.
2) maximum power point tracking device under local shades of the invention, DSP single-chip microcomputers are according to the light that is blocked for receiving
The dutycycle of the pwm signal of volt unit number and voltage x current value controlled output, photovoltaic array is adjusted by Boost translation circuits
Output voltage, realize photovoltaic array MPPT maximum power point tracking control, while voltage x current value is uploaded into host computer, be easy to
Voltage, electric current and changed power that user's observation photovoltaic array is exported, monitor in real time MPPT (maximum power point) tracing process.
Brief description of the drawings
Fig. 1 is the principle assumption diagram of apparatus of the present invention；
Fig. 2 is the schematic diagram of signal processing circuit in apparatus of the present invention；
Fig. 3 is the schematic diagram that statistics blocks number circuit in apparatus of the present invention；
Fig. 4 is the flow chart of the inventive method；
Fig. 5 (a), (b) be the inventive method embodiment one maximum power point tracking during photovoltaic array output I-
V, P-V characteristic curve；
Fig. 6 (a), (b) are I-V, P-V characteristic curve of photovoltaic array output in the inventive method embodiment two；
Fig. 7 is the voltage curve shown in host computer in the embodiment of the present invention two；
Fig. 8 is the current curve diagram shown in host computer in the embodiment of the present invention two.
Specific embodiment
The invention will be further described below in conjunction with the accompanying drawings.Following examples are only used for clearly illustrating the present invention
Technical scheme, and can not be limited the scope of the invention with this.
As shown in Figure 1 to Figure 3, maximum power point tracking device under a kind of photovoltaic generating system local shades of the invention,
It is characterized in that, including multiple photovoltaic cells be composed in series photovoltaic array, for detecting photovoltaic array output voltage current value
Voltage and current detection circuit, the Boost translation circuits for adjusting photovoltaic array output voltage, for detect photovoltaic array export
Illumination intensity value intensity of illumination detection circuit, for count be blocked photovoltaic cells number statistics block number circuit,
DSP single-chip microcomputers and host computer；
The output end of photovoltaic array connects the respective input of voltage and current detection circuit, voltage and current detection circuit it is defeated
Go out the corresponding analog quantity input of end connection DSP single-chip microcomputers；
The pwm signal output end of DSP single-chip microcomputers connects the input of Boost translation circuits by PWM drive circuit,
The output end connection photovoltaic array of Boost translation circuits；
The output end of photovoltaic array is also connected with the respective input that intensity of illumination detects circuit, intensity of illumination detection circuit
Output end connection statistics block the input of number circuit, and statistics blocks the phase of the output end connection DSP single-chip microcomputers of number circuit
Answer input；
DSP single-chip microcomputers realize both-way communication by communication interface and host computer；
Pwm signal of the DSP single-chip microcomputers according to be blocked photovoltaic cells number and the voltage x current value controlled output for receiving
Dutycycle, by Boost translation circuits adjust photovoltaic array output voltage, realize the MPPT maximum power point tracking of photovoltaic array
Control, while voltage x current value is uploaded into host computer.
Further, DSP single-chip microcomputers and the interface of upper machine communication are RS232 serial communication interfaces.Host computer passes through
RS232 interfaces are bi-directionally connected with DSP main control chips, after the serial port in host computer and baud rate are respectively provided with correctly, can be by DSP
Voltage, the current value for collecting display, monitor in real time MPPT (peak powers in the form of waveform and instantaneous value in host computer
Point) tracing process.
Further, also including signal processing circuit, the output end of voltage and current detection circuit passes through signal processing circuit
The analog input end of DSP single-chip microcomputers is connected, signal processing circuit is filtered treatment to voltage x current analog signal and level turns
Change.Signal processing circuit is filtered treatment and adjustment number range to voltage x current analog signal.Signal processing circuit herein
Effect be not only filtering, the I/O input reference signals of mainly DSP single-chip microcomputers are 0-3.3V, and measure voltage ＆ current is electric
The size of road measured value is generally unsatisfactory for range of signal, therefore after needing signal processing circuit that voltage x current is gone into 0-3.3V, DSP
I/O could receive.As shown in Fig. 2 signal processing circuit carries out ratio change using four operational amplifier LM324AN of low-power consumption
Change, four operational amplifiers connect voltage-regulator diode after being sequentially connected in series, in the analog signal voltage stabilizing that will be gathered to 0-3.3V.
Further, as shown in figure 3, intensity of illumination detection circuit uses intensity of illumination sensor, statistics blocks number electricity
Road includes the comparator unit, cell encoder and the level conversion unit that are sequentially connected in series；Comparator unit uses comparator, specifically
Circuit reference prior art, cell encoder uses 74LS148 chips, the voltage that level conversion unit exports cell encoder
I/O mouthfuls of DSP of 0-3.3V voltage ranges are converted to, physical circuit refers to prior art.During low profile photovoltaic ARRAY PROCESSING, can be by
Code device signal is directly connected to DSP single-chip processor i/o pins by the signal after level conversion, and large-scale array then considers first to cascade
The I/O pins of DSP are then connected to afterwards.Intensity of illumination sensor gathers real-time lighting intensity level first, and sends numerical value to ratio
Compared with device unit；With a upper sampling instant be compared current light value by comparator unit, if size is in error margin,
Think that illumination is identical, comparator unit output low level 0；If illumination size is differed, comparator unit output high level 1；
Comparative result further is delivered into cell encoder (such as 74LS148) to be encoded；By encoder result by level conversion
Delivered to after processing of circuit at DSP pins, DSP obtains the photovoltaic cells number that is blocked, such as 3 pins are connected, if 101, i.e.,
The photovoltaic cells number that is blocked is 5, if 000, that is, the photovoltaic cells number that is blocked is 0.
Further, DSP single-chip microcomputers use TMS320F28335.TMS320F28335 has the high speed processing energy of 150MHz
Power, possesses 32 floating point processing units, and 6 DMA channels support ADC, and the PWM for having up to 18 tunnels is exported, wherein there is 6 tunnels special for TI
PWM outputs (HRPWM) of some higher precisions, 12 16 passage ADC.With low cost, small power consumption, performance is high, and peripheral hardware is integrated
Degree is high, and data and program storage amount are big, the more accurate quick advantage of A/D conversions.
Present invention also offers maximum power point tracing method under a kind of photovoltaic generating system local shades, as shown in figure 4,
It is characterized in that, comprise the following steps：
Step one, the photovoltaic cells number that is blocked according to collection judges whether photovoltaic array partial occlusion occurs, if individual
Number shows not to be blocked for 0, then carry out MPPT maximum power point tracking using conductance increment method, obtains the corresponding electricity of maximum power point
Pressure value is U, and performance number is P；Otherwise, into step 2；
Step 2, the photovoltaic cells number that is blocked according to collection builds load line function, follows the trail of maximum power point；Specifically
Process is：
S201) regulation photovoltaic array makes output voltage keep magnitude of voltage U, obtains now corresponding current value I；
S202 the photovoltaic cells number N that is blocked) is obtained1, N1Take positive integer；
S203 relation between the crest number for) being exported according to photovoltaic array and the photovoltaic cells number that is blocked：N2=N1+ 1,
Obtain crest number N2；
S204) according to relation between load line function number and crest number：N3=N2- 1, obtain load line function number
N3；
S205 load line function) is built：VN=I × VOC×N/ISC, wherein：I by the value being calculated in step S201,
Expression block that magnitude of voltage at preceding maximum power point is corresponding and block after current value, VocIt is the open-circuit voltage of photovoltaic array,
IscIt is the short circuit current of photovoltaic array, N represents number of skips, and N=1,2......N3；The V for obtainingNThe extreme value of access areas
Point, shortens the whole MPPT maximum power point tracking time, improves efficiency；Especially when blocking number and being smaller, patent is contrasted
Load line function formula in CN201510867811, due to falling after current value it is relatively large, the V for now obtainingNMore connect
The extreme point of near field；
S206) started the cycle over up to N=N from N=13, in magnitude of voltage VNIn the range of maximum work is carried out using conductance increment method
Rate point is tracked, and obtains the corresponding performance number P of maximum power pointN；In the magnitude of voltage V for storing beforeNScanned in region, stored
Magnitude of voltage be the voltage range for jumping to, the maximum power point being set between location that differs is, it is necessary to scan for；
S207) regulation photovoltaic array makes output voltage keep magnitude of voltageIn magnitude of voltageIn the range of use
Conductance increment method carries out MPPT maximum power point tracking, obtains the corresponding performance number of maximum power point
S208) chooseMiddle maximum is used as maximum power point.According to the maximum power point for obtaining, will
Regulation photovoltaic array makes output voltage keep the corresponding magnitude of voltage of maximum power point, you can photovoltaic array is operated in peak power
Point, improves the energy conversion efficiency of photovoltaic array.
Clear in structure of the present invention, definite functions, realization are convenient, are particularly suited for intensity of illumination and catastrophe occur, improve
MPPT maximum power point tracking efficiency, reduces energy loss.
Embodiment one
Specific work process of the invention is illustrated with specific embodiment below, initial time, intensity of illumination is uniform, and statistics hides
Gear number mesh circuit is not detected by photovoltaic array to be occurred blocking, and voltage, current detection circuit gather the voltage x current value of photovoltaic array,
By after the signal conditioning circuit treatment in device, being sent to the ADC of DSP, now on the one hand DSP single-chip microcomputers pass through conductance
Method of addition exports the PWM ripples of corresponding dutycycle, drives boost translation circuits, on the other hand by RS232 interfaces by voltage, electricity
Flow valuve is sent to host computer；The final maximum power point for tracking photovoltaic array is located at point A, and corresponding magnitude of voltage is VA, power
It is P to be worthA.After a period of time, when statistics blocks number electric circuit inspection to be occurred blocking to photovoltaic array, count on and have two pieces
Photovoltaic cell appearance is different degrees of to block, shown in photovoltaic array I-V, P-V output characteristic curve such as Fig. 5 (a), (b) now.
The number relation that the crest number of output characteristics is blocked with series-connected cell unit when now DSP single-chip microcomputers are according to partial occlusion,
And load line function number and the relational expression of crest number, obtain now N3=2, DSP single-chip microcomputer keep peak power first
Magnitude of voltage V at point AAConstant, after stability of characteristics to be output, now electric current is reached at B points, and sizes values are IB；Initially set up negative
Carry line function 1：VC=IB×VOC/ISC, by IBThe magnitude of voltage V at C points can be obtained in substitution function 1C；DSP single-chip microcomputers are to the region
Conductance increment method tracking is carried out, maximum power point E is finally can obtain, the current value of its output is IE, performance number is PE；Then it is same
Reason sets up load line function 2:VD=2 × IB×VOC/ISC, by IBMagnitude of voltage V after being processed in substitution function 2 at D pointsD, control
Circuit processed carries out MPPT maximum power point tracking to the region, finally can obtain maximum power point F, and the current value of its output is IF,
Performance number is PF；Finally control circuit carries out maximal power tracing to B points region, may search for the corresponding maximum work in the region
Rate point is G points, and the current value of its output is IG, performance number is PG.After search is completed, DSP single-chip microcomputers can compare PE、PFAnd PGThree
The size of person, takes the value of maximum of which G points, is exported as global maximum power point, so as to complete the tracking of GMPP.
Embodiment two
It is the actual validity of checking the inventive method, two photovoltaic cells of realistic simulation of the present invention light occur when connecting
According to circumstance of occlusion.Fig. 6 (a), (b) are that intensity of illumination is 1/1 (kW/m2) and 1/0.8 (kW/m2) when I-V, P-V output characteristics it is bent
Line.Based on above-mentioned experiment porch, during t=80s, intensity of illumination is set in photovoltaic array I-V simulators by 1/1 (kW/m2) become
It is 1/0.8 (kW/m2)；t<During 80s, after being processed according to inventive control algorithm, circuit and signal are detected by Current Voltage
After process circuit, voltage at maximum power point, current value about 76.50V, 4.45A are now tracked；As t >=80s, search
Rope obtains voltage x current the value about 80.80V, 3.70A of maximum power point.Voltage, the electric current of whole search procedure are upper
Waveform in machine oscillograph as shown in Figure 7 and Figure 8, the present invention is being occurred blocking the front and rear maximum power point and Fig. 6 for searching
A voltage, current value in (), (b) at actual global maximum power point are contrasted, as a result show in rational error range
Both are equal in magnitude.
The above is only the preferred embodiment of the present invention, it is noted that for the ordinary skill people of the art
For member, on the premise of the technology of the present invention principle is not departed from, some improvement and modification can also be made, these are improved and modification
Also should be regarded as protection scope of the present invention.
Claims (5)
1. maximum power point tracking device under a kind of photovoltaic generating system local shades, it is characterized in that, including multiple photovoltaic cells
The photovoltaic array being composed in series, the voltage and current detection circuit for detecting photovoltaic array output voltage current value, for adjusting
The Boost translation circuits of photovoltaic array output voltage, the intensity of illumination inspection for detecting the illumination intensity value that photovoltaic array is exported
Slowdown monitoring circuit, the statistics of the photovoltaic cells number that is blocked for statistics block number circuit, DSP single-chip microcomputers and host computer；
The output end of photovoltaic array connects the respective input of voltage and current detection circuit, the output end of voltage and current detection circuit
Connect the corresponding analog quantity input of DSP single-chip microcomputers；
The pwm signal output end of DSP single-chip microcomputers connects the input of Boost translation circuits by PWM drive circuit, and Boost becomes
Change the output end connection photovoltaic array of circuit；
The output end of photovoltaic array is also connected with the respective input that intensity of illumination detects circuit, and intensity of illumination detects the output of circuit
End connection statistics block the input of number circuit, and statistics blocks the corresponding defeated of the output end connection DSP single-chip microcomputers of number circuit
Enter end；
DSP single-chip microcomputers realize both-way communication by communication interface and host computer；
DSP single-chip microcomputers are accounted for according to the pwm signal of be blocked photovoltaic cells number and the voltage x current value controlled output for receiving
Sky ratio, the output voltage of photovoltaic array is adjusted by Boost translation circuits, realizes the MPPT maximum power point tracking control of photovoltaic array
System, while voltage x current value is uploaded into host computer；
Intensity of illumination detection circuit uses intensity of illumination sensor, and statistics blocks number circuit includes the comparator list being sequentially connected in series
Unit, cell encoder and level conversion unit.
2. maximum power point tracking device, its feature under a kind of photovoltaic generating system local shades according to claim 1
It is that DSP single-chip microcomputers are RS232 serial communication interfaces with the interface of upper machine communication.
3. maximum power point tracking device, its feature under a kind of photovoltaic generating system local shades according to claim 1
It is that, also including signal processing circuit, the output end of voltage and current detection circuit connects DSP single-chip microcomputers by signal processing circuit
Analog input end, signal processing circuit connects diode circuit of voltage regulation after being sequentially connected in series using four operational amplifiers.
4. maximum power point tracking device, its feature under a kind of photovoltaic generating system local shades according to claim 1
It is that DSP single-chip microcomputers use TMS320F28335.
5. maximum power point tracing method under a kind of photovoltaic generating system local shades, it is characterized in that, comprise the following steps：
Step one, the photovoltaic cells number that is blocked according to collection judges whether photovoltaic array partial occlusion occurs, if number is 0
Show not to be blocked, then MPPT maximum power point tracking is carried out using conductance increment method, obtain the corresponding magnitude of voltage of maximum power point
It is U, performance number is P；Otherwise, into step 2；
Step 2, the photovoltaic cells number that is blocked according to collection builds load line function, follows the trail of maximum power point；Detailed process
For：
S201) regulation photovoltaic array makes output voltage keep magnitude of voltage U, and now corresponding current value I is obtained after stabilization；
S202 the photovoltaic cells number N that is blocked) is obtained1, N1It is positive integer；
S203 relation between the crest number for) being exported according to photovoltaic array and the photovoltaic cells number that is blocked：N2=N1+ 1, obtain
Crest number N2；
S204) according to relation between load line function number and crest number：N3=N2- 1, obtain load line function number N3；
S205 load line function) is built：VN=I × VOC×N/ISC, wherein：I is represented by the value being calculated in step S201
Current value after blocking that the magnitude of voltage at preceding maximum power point is corresponding and blocking, VocIt is the open-circuit voltage of photovoltaic array, IscFor
The short circuit current of photovoltaic array, N represents number of skips, and N=1,2......N3；
S206) started the cycle over up to N=N from N=13, in magnitude of voltage VNIn the range of maximum power point is carried out using conductance increment method
Tracking, obtains the corresponding performance number P of maximum power pointN；
S207) regulation photovoltaic array makes output voltage keep magnitude of voltageIn magnitude of voltageIn the range of use conductance
Method of addition carries out MPPT maximum power point tracking, obtains the corresponding performance number of maximum power point
S208) chooseMiddle maximum is used as maximum power point.
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| CN108304026A (en) * | 2017-11-30 | 2018-07-20 | 深圳市首航新能源有限公司 | A kind of powerinjected method method |
| CN108710402B (en) * | 2018-05-30 | 2020-07-10 | 中国计量大学 | Multimodal maximum power point tracking method for solar photovoltaic string |
| TWI706629B (en) * | 2019-07-12 | 2020-10-01 | 龍華科技大學 | A method for tracking the global maximum power of solar cells |
| CN112489085A (en) * | 2020-12-11 | 2021-03-12 | 北京澎思科技有限公司 | Target tracking method, target tracking device, electronic device, and storage medium |
| CN113742265B (en) * | 2021-09-08 | 2024-02-27 | 江苏中信博新能源科技股份有限公司 | DMA-based data acquisition method and system for photovoltaic tracker |
| CN114400971B (en) * | 2022-01-21 | 2023-11-07 | 中国华能集团清洁能源技术研究院有限公司 | Photovoltaic power station string code checking method and device |
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