CN205594495U - Photovoltaic module MPPT controlling means - Google Patents
Photovoltaic module MPPT controlling means Download PDFInfo
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- CN205594495U CN205594495U CN201620400510.2U CN201620400510U CN205594495U CN 205594495 U CN205594495 U CN 205594495U CN 201620400510 U CN201620400510 U CN 201620400510U CN 205594495 U CN205594495 U CN 205594495U
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- 238000001514 detection method Methods 0.000 claims description 25
- 238000005070 sampling Methods 0.000 claims description 11
- 238000007599 discharging Methods 0.000 claims description 9
- 238000004146 energy storage Methods 0.000 claims description 7
- 238000000034 method Methods 0.000 abstract description 24
- 230000005611 electricity Effects 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 238000007689 inspection Methods 0.000 description 2
- 230000006978 adaptation Effects 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 238000012938 design process Methods 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000005457 optimization Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- 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
Abstract
The utility model discloses a photovoltaic module MPPT controlling means, in operation, can realize tentatively fixing a position photovoltaic module maximum power point fast through overall situation scanning, later through the switching of electronic load with the boost circuit, and to the adjustment of boost circuit duty cycle, can realize the further precise adjustment to preliminary location maximum power point, and, the overall situation does not influence the work of load when scanning, compare in current MPPT method and apparatus for, position fixing process to maximum power point is rapid, reduced back feed cost and easy realization, also can embody photovoltaic module MPPT's advantage under external environment complicated and changeable.
Description
Technical field
This utility model relates to technical field of new energy power generation, be specially a kind of photovoltaic module maximum power point with
Track controls device.
Background technology
Photovoltaic module in photovoltaic generating system is affected by intensity of illumination, ambient temperature and external load, its
Output characteristic curve presents non-linear, by control device make photovoltaic module under different external environments the most defeated
Go out peak power i.e. realizing the MPPT of photovoltaic module is one of key technology improving photovoltaic efficiency.
Different according to photovoltaic module output characteristic curve peak number at present, photovoltaic module MPPT method is divided into:
Single peak MPPT method and multi-peak MPPT method.In Conventional monomodal value MPPT method, based on sampled data straight
Connect that control methods is with clearly defined objective, be easily achieved, be widely used, as constant voltage process, disturbance observation method,
Conductance increment method and open-circuit voltage/short circuit current Y-factor method Y etc..In reality, owing to external environment is complicated and changeable,
Being affected because being produced local shades by Adjacent Buildings, trees and black clouds etc., photovoltaic module output presents
Multi-peak characteristic, Conventional monomodal value MPPT method is easily absorbed in local MPP and lost efficacy, and therefore occurs in that for local
The MPPT method of photovoltaic module multi-peak under shadowed condition, as particle swarm optimization algorithm, fuzzy immune control are calculated
Method, two-step method and Fibonacci sequential searching algorithms etc., but said method design process is more complicated, hardware
Realize the most difficult.
Summary of the invention
Technical purpose of the present utility model is to provide a kind of novel photovoltaic module MPPT and controls device, can realize
The MPPT control strategy to photovoltaic module is observed in conjunction with whole scan and disturbance.
The technical scheme that this utility model provides is:
A kind of photovoltaic module MPPT controls device, including digitial controller, photovoltaic module, Boost circuit,
Load resistance RLAnd voltage and current detection circuit, described photovoltaic module passes through Boost circuit and load resistance
RLConnect, to load RLPower supply, the regulation signal input part of described Boost circuit and described digitial controller
Signal output part connect, it is characterised in that be provided with and Boost between described photovoltaic module and Boost circuit
The energy storage branch road of circuit in parallel and electronic load circuit；
It is serially connected with electric capacity C on described energy storage branch road1, described electronic load circuit is serially connected with electronic load and opens
Close S2, between electronic load circuit and energy storage branch road, it is serially connected with switch S1, described electronic load is provided with by 1～n
The MOSFET pipe array of individual paralleling MOS FET pipe composition, n is natural number；
Described switch S1, switch S2Control signal input export with the signal of described digitial controller respectively
End connects, and digitial controller is by controlling switch S1, switch S2Break-make make Boost circuit or electronic load
Depart from or be switched in the output circuit of photovoltaic module；
Described voltage and current detection circuit includes photovoltaic module output voltage detection module, photovoltaic module output electricity
Stream detection module and detection each MOSFET pipe parallel branch detection module by electric current, above-mentioned each detection module
Signal output part be connected with the signal input part of digitial controller respectively, described electronic load work time according to
The output signal of digitial controller adjusts the conducting state of MOSFET pipe array.
On the basis of such scheme, improve further or preferably scheme also include:
Described MOSFET pipe parallel branch is provided with the current sampling resistor connected with power MOSFET tube, institute
State current sampling resistor both end voltage and export the inspection of corresponding electric current through differential percentage amplication device based on integrated transporting discharging
Survey signal.
Described photovoltaic module and switch S1Between be serially connected with for detect photovoltaic module output electric current current sample
Resistance R0, described current sampling resistor ROBoth end voltage exports through differential percentage amplication device based on integrated transporting discharging
Corresponding current detection signal IPV；The output voltage of photovoltaic module is through differential percentage amplication based on integrated transporting discharging
The detection signal V that device output is correspondingPV。
Described switch S1、S2Preferably employ IGBT pipe (insulated gate bipolar transistor).
When being switched on the output circuit of photovoltaic module by electronic load, voltage, current double closed-loop is used to control
System control electronic load work in constant voltage mode of operation, can with fixed step size make photovoltaic module output voltage by
Null value incrementally increases to open-circuit voltage values, carries out the full scan of photovoltaic module volt-ampere output characteristics.Scanning process
In: Voltage loop is outer shroud, its command value VREFFrom digitial controller output after D/A converter, feedback
Value is voltage sense signal V of photovoltaic modulePV；Each MOSFET pipe parallel branch current detection signal I1~
InThen being respectively 1～the value of feedback of n current inner loop, the output of outer voltage actuator is as 1～n electric current
The common instruction value of internal ring, in each MOSFET pipe parallel branch, the output of rheonome is then respectively 1～n
The gate source voltage signal of individual power MOSFET tube.
Beneficial effect:
It is reasonable in design that this utility model photovoltaic module MPPT controls apparatus structure, during work, can realize by entirely
Office's scanning carries out Primary Location rapidly to photovoltaic module maximum power point, afterwards by electronic load and Boost
The switching of circuit, and the adjustment to Boost circuit dutycycle, can realize Primary Location maximum further
The accurate adjustment of power points, and do not affect the work of load when whole scan, compared to existing MPPT side
Method and device, rapid to the position fixing process of maximum power point, and be easily achieved, at extraneous ring complicated and changeable
Also the advantage that can embody photovoltaic module MPPT under border.
Accompanying drawing explanation
Fig. 1 is the electrical block diagram of this utility model one embodiment.
Detailed description of the invention
In order to illustrate the technical solution of the utility model and technical purpose, below in conjunction with the accompanying drawings and specific embodiment
This utility model is described further.
A kind of photovoltaic module MPPT controls device, including digitial controller, photovoltaic module, Boost circuit,
Load resistance RL, electronic load, voltage and current detection circuit, voltage regulator, the composition such as rheonome
Parts.As it is shown in figure 1, master switch S3, inductance L, diode D and electric capacity C2Constitute Boost circuit, make
For the DC converter in photovoltaic generating system；Resistance RLDC load as photovoltaic generating system；n(n
Natural number for more than 1) individual power MOSFET tube Q1～Qn parallel connection constitute MOSFET pipe array as electronics
Load, resistance R1～Rn is respectively as detection the 1st～the sampling of n power MOSFET tube parallel branch electric current
Resistant series is in MOSFET pipe parallel branch, and each branch current sampling resistor both end voltage is through integrated transporting discharging structure
1#～the n#MOSFET pipe parallel branch current detection signal I of the differential percentage amplication device output correspondence become1~
In；R0Sampling resistor as detection photovoltaic module output electric current is connected on photovoltaic module and switch S1Between, its
The photovoltaic module output electric current measure of the differential percentage amplication device output correspondence that both end voltage is constituted through integrated transporting discharging
Signal IPV；The inspection of the differential percentage amplication device output correspondence that the output voltage of photovoltaic module is constituted through integrated transporting discharging
Survey signal VPV。
Described Boost circuit, it is serially connected with electric capacity C1Energy storage branch road and electronic load circuit with shape in parallel
Formula is received on the output circuit of photovoltaic module, IGBT pipe S1、S2Electronic Negative is accessed for controlling photovoltaic module switching
Carry the switching switch of whole scan, photovoltaic generating system power inverter (Boost circuit).
When needing photovoltaic module is exported C-V characteristic and carrying out whole scan to realize the Primary Location of MPP,
Digitial controller sends G1=0, G2The control signal of=1, controls S1Shutoff, S2Conducting, photovoltaic module and Boost
Circuit and load resistance RLSeparate, electric capacity C1Stored electric energy is to Boost circuit and load RLPower supply, electricity
Son load is access in as the controllable load of photovoltaic module.In accompanying drawing, the present embodiment device employing voltage,
Current double closed-loop control system controls electronic load and works in constant voltage mode of operation, makes photovoltaic group with fixed step size
Part output voltage is incrementally increased to open-circuit voltage values (output open circuit) by null value (output short-circuit), carries out photovoltaic
The full scan of assembly volt-ampere output characteristics.In scanning process, digitial controller real-time sampling photovoltaic output electricity
Pressure VPVWith output electric current IPV, calculate photovoltaic output P, when the end of scan, complete MPP Primary Location,
Provide magnitude of voltage V corresponding to overall situation MPPm.Wherein, Voltage loop is outer shroud, its command value VREFFrom numeral control
The output after D/A converter of the digital quantity of device processed, the value of feedback to digitial controller is the defeated of photovoltaic module
Go out voltage detection signal VPV, the output of outer voltage actuator is as 1～the common instruction of n current inner loop
Value, 1#～n#MOSFET pipe parallel branch current detection signal I1～InThen it is respectively 1～n current inner loop
Value of feedback, the output of 1#～n# branch current actuator is then respectively 1～the grid source of n power MOSFET tube
Voltage signal.
When electronic load is to the photovoltaic module I-V curve end of scan, completes MPP Primary Location, provide the overall situation
Magnitude of voltage V corresponding for MPPmAfter, digitial controller sends G1=1, G2The control signal of=0, S1Conducting, S2
Turning off, photovoltaic module is connected with Boost circuit, and electronic load separates with photovoltaic module, and digitial controller is first
The magnitude of voltage V first obtained with MPP Primary LocationmAs reference value, by controlling master switch S3Dutycycle make
The output voltage of photovoltaic module is Vm, on this basis, it is contemplated that electronic load is to photovoltaic module output characteristics
Scanning process may cause error because step-length is excessive, quasi-gradient type variable step disturbance observation can be used further
Method is in search in actual peak power neighborhood of a point, to realize MPPT.
Two kinds are generally divided into for photovoltaic module MPPT scan control mode: one is fixed cycle whole scan；
Another kind is to carry out whole scan when output changes greatly.The former is applicable to external environment change slowly
Time, it is not necessary to frequent movement, but the adaptation ability of environment is poor to external world；The latter is applicable to external environment change
Time more violent, rapidly environmental change can be reacted, but need frequent movement.Consider whole scan
Time-consuming and the scanning handoff procedure impact on rear class Boost circuit, the present embodiment uses latter working method,
When detecting power change values and exceeding setting threshold value, i.e. restart scanning circuit.
Of the present utility model ultimate principle, principal character and of the present utility model advantage have more than been shown and described.
Skilled person will appreciate that of the industry, this utility model is not restricted to the described embodiments, above-described embodiment
With description described in principle of the present utility model is simply described, without departing from this utility model spirit and model
On the premise of enclosing, this utility model also has various changes and modifications, this utility model claim scope by
Appending claims, description and equivalent thereof define.
Claims (5)
1. photovoltaic module MPPT controls a device, including digitial controller, photovoltaic module, Boost circuit, load resistance RLAnd voltage and current detection circuit, described photovoltaic module is by Boost circuit and load resistance RLConnect, to load RLPower supply, the regulation signal input part of described Boost circuit is connected with the signal output part of described digitial controller, it is characterised in that be provided with the energy storage branch road in parallel with Boost circuit and electronic load circuit between described photovoltaic module and Boost circuit；
It is serially connected with electric capacity C on described energy storage branch road1, described electronic load circuit is serially connected with electronic load and switch S2, between electronic load circuit and energy storage branch road, it is serially connected with switch S1, described electronic load is provided with the MOSFET pipe array being made up of 1～n paralleling MOS FET pipe, and n is natural number；
Described switch S1, switch S2Control signal input signal output part with described digitial controller respectively be connected, digitial controller is by controlling switch S1, switch S2Break-make make Boost circuit or electronic load depart from or be switched in the output circuit of photovoltaic module；
Described voltage and current detection circuit includes photovoltaic module output voltage detection module, photovoltaic module output electric current measure module and detects each MOSFET pipe parallel branch detection module by electric current, the signal output part of above-mentioned each detection module is connected with the signal input part of digitial controller respectively, adjusts the conducting state of MOSFET pipe array during the work of described electronic load according to the output signal of digitial controller.
A kind of photovoltaic module MPPT the most according to claim 1 controls device, it is characterized in that, described MOSFET pipe parallel branch is provided with the current sampling resistor connected with power MOSFET tube, and described current sampling resistor both end voltage exports corresponding current detection signal through differential percentage amplication device based on integrated transporting discharging.
A kind of photovoltaic module MPPT the most according to claim 1 controls device, it is characterised in that described photovoltaic module and switch S1Between be serially connected with for detect photovoltaic module output electric current current sampling resistor R0, described current sampling resistor ROBoth end voltage is through the current detection signal I of differential percentage amplication device based on integrated transporting discharging output correspondencePV；The output voltage of photovoltaic module is through the detection signal V of differential percentage amplication device based on integrated transporting discharging output correspondencePV。
A kind of photovoltaic module MPPT the most according to claim 1 controls device, it is characterised in that described switch S1、S2Manage for IGBT.
5. control device according to a kind of photovoltaic module MPPT according to any one of claim 1-4, it is characterized in that, when electronic load is switched on the output circuit of photovoltaic module, use voltage, current double closed-loop control system to control electronic load and work in constant voltage mode of operation, wherein, Voltage loop is outer shroud, its command value VREFFrom digitial controller output after D/A converter, value of feedback is voltage sense signal V of photovoltaic modulePV；Each MOSFET pipe parallel branch current detection signal I1～InThen be respectively 1～the value of feedback of n current inner loop, the output of outer voltage actuator as 1～the common instruction value of n current inner loop, the output of rheonome then respectively 1～the gate source voltage signal of n power MOSFET tube in each MOSFET pipe parallel branch.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201620400510.2U CN205594495U (en) | 2016-05-05 | 2016-05-05 | Photovoltaic module MPPT controlling means |
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| CN201620400510.2U CN205594495U (en) | 2016-05-05 | 2016-05-05 | Photovoltaic module MPPT controlling means |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174920A (en) * | 2019-06-10 | 2019-08-27 | 上海空间电源研究所 | A kind of solar battery array variable step MPPT control circuit and control method |
| CN114336755A (en) * | 2022-01-06 | 2022-04-12 | 华为数字能源技术有限公司 | Auxiliary starting circuit and photovoltaic power generation system |
| CN116865203A (en) * | 2023-06-01 | 2023-10-10 | 湖南恩智测控技术有限公司 | Electronic load overcurrent protection method, electronic load and computer readable storage medium |
| CN117519418A (en) * | 2023-12-04 | 2024-02-06 | 青岛艾诺仪器有限公司 | Maximum power point tracking method executed by direct current electronic load |
-
2016
- 2016-05-05 CN CN201620400510.2U patent/CN205594495U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110174920A (en) * | 2019-06-10 | 2019-08-27 | 上海空间电源研究所 | A kind of solar battery array variable step MPPT control circuit and control method |
| CN114336755A (en) * | 2022-01-06 | 2022-04-12 | 华为数字能源技术有限公司 | Auxiliary starting circuit and photovoltaic power generation system |
| CN116865203A (en) * | 2023-06-01 | 2023-10-10 | 湖南恩智测控技术有限公司 | Electronic load overcurrent protection method, electronic load and computer readable storage medium |
| CN117519418A (en) * | 2023-12-04 | 2024-02-06 | 青岛艾诺仪器有限公司 | Maximum power point tracking method executed by direct current electronic load |
| CN117519418B (en) * | 2023-12-04 | 2024-03-29 | 青岛艾诺仪器有限公司 | Maximum power point tracking method executed by direct current electronic load |
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