CN108964238A - High-efficiency photovoltaic control method - Google Patents
High-efficiency photovoltaic control method Download PDFInfo
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- CN108964238A CN108964238A CN201810753071.7A CN201810753071A CN108964238A CN 108964238 A CN108964238 A CN 108964238A CN 201810753071 A CN201810753071 A CN 201810753071A CN 108964238 A CN108964238 A CN 108964238A
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- 238000000034 method Methods 0.000 title claims abstract description 27
- 230000000295 complement effect Effects 0.000 claims abstract description 17
- 238000010248 power generation Methods 0.000 abstract description 12
- 230000005611 electricity Effects 0.000 abstract description 9
- 238000004140 cleaning Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 4
- 241001465382 Physalis alkekengi Species 0.000 description 2
- 238000009825 accumulation Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
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- 238000001514 detection method Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J7/00—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries
- H02J7/34—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering
- H02J7/35—Parallel operation in networks using both storage and other dc sources, e.g. providing buffering with light sensitive cells
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- H02J7/0077—
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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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The invention discloses a kind of high-efficiency photovoltaic control methods, comprising the following steps: uses rapid perturbations method, determines the peak power output of photovoltaic module；Photovoltaic module exports electric energy with peak power output, and the real-time output power value of photovoltaic is transferred to control module；Judge whether the real-time output power of photovoltaic is greater than the rated power of load；If more than then control module is negative according to the rated power of load control photovoltaic electric energy and carries power supply, and remaining photovoltaic electric energy is filled with battery group；If being not more than, controlling alternating current complementary module is load supplying.This programme uses the mode of photovoltaic power generation cooperation battery group for load supplying, and cleaning is reliable, and obtains conveniently；It can directly be supplemented by alternating current by alternating current complementary module in the case where photovoltaic power generation is unstable simultaneously, avoid the occurrence of the case where load short of electricity can not work.
Description
Technical field
The present invention relates to photovoltaic power supplies, especially relate to a kind of high-efficiency photovoltaic control method.
Background technique
With the proposition of Conception of Sustainable Development, more and more clean energy resourcies are used, for example, wind-power electricity generation, tide
It can power generation and photovoltaic power generation.Wherein light is as a kind of clean renewable energy, and most area can be direct in the world
It gets, it is convenient and efficient.
One of current solar energy generation technology are as follows: solar photovoltaic grid-connection contravariant generating system technology, it mainly will tool
There is the solar photovoltaic electric power of direct current to think the power grid output of exchange, by national grid accumulation of energy, but the process in inversion can be very
Big a part of electric energy.Another technology are as follows: use off-grid photovoltaic application technology, be mainly used in street lamp, isolated island is small
Under the scenes such as power station, it is easy to appear cloudy electric energy and not enough uses, and fine day has remaining situation.
Summary of the invention
In order to solve the defect of the above-mentioned prior art, the object of the present invention is to provide a kind of high-efficiency photovoltaic control methods.
In order to achieve the above objectives, the technical scheme is that a kind of high-efficiency photovoltaic control method, comprising the following steps:
Using rapid perturbations method, the peak power output of photovoltaic module is determined；
Photovoltaic module exports electric energy with peak power output, and the real-time output power value of photovoltaic is transferred to control module；
Judge whether the real-time output power of photovoltaic is greater than the rated power of load；
If more than then control module is negative according to the rated power of load control photovoltaic electric energy and carries power supply, and will be remaining
Photovoltaic electric energy is filled with battery group；
If being not more than, controlling alternating current complementary module is load supplying.
Further, it is load supplying that the control module, which controls electric energy according to the rated power of load, and will be remaining
Photovoltaic electric energy is filled with after battery group step, including,
Detect the voltage value of battery group；
Judge whether voltage value is less than preset value；
If being less than, controlling alternating current complementary module is battery charging.
Further, described to use rapid perturbations method, determine the peak power output step of photovoltaic module, including,
Quickly change the duty ratio of the PWM in photovoltaic module；
The output power size for comparing different duty finds out the duty ratio of output power；
Left and right disturbance, determines the maximum power of photovoltaic module centered on the duty ratio.
Further, the preset value is 24V.
Further, the load is DC load.
The beneficial effects of the present invention are: this programme uses the mode of photovoltaic power generation cooperation battery group for load supplying, clearly
It is clean reliable, and obtain conveniently；Alternating current can be passed through in the case where photovoltaic power generation is unstable by alternating current complementary module simultaneously
It is directly supplemented, avoids the occurrence of the case where load short of electricity can not work.
Detailed description of the invention
Fig. 1 is a kind of system structure diagram of high-efficiency photovoltaic control system of the present invention；
Fig. 2 is a kind of method flow diagram of high-efficiency photovoltaic control method of the present invention；
Fig. 3 is a kind of method flow diagram of determining photovoltaic module peak power output of the present invention；
Fig. 4 is a kind of method flow diagram of high-efficiency photovoltaic control method of another embodiment of the present invention.
Specific embodiment
To illustrate thought and purpose of the invention, the present invention is done further below in conjunction with the drawings and specific embodiments
Explanation.
Referring to Fig.1, one embodiment of the invention proposes a kind of high-efficiency photovoltaic control system, comprising: control module 10, and
The power switching modules 20 and alternating current complementary module 40 connecting with control module 10, power switching modules 20 are electrically connected with battery
Group 50 and load 30, battery group 50 are connected with photovoltaic module 60, the electrical connection of alternating current complementary module 40 load 30.
With reference to Fig. 2 and 3, based on above-mentioned high-efficiency photovoltaic control system, propose that a specific embodiment of the invention is a kind of efficiently
Photovoltaic control method, comprising the following steps:
S10, using rapid perturbations method, determine the peak power output of photovoltaic module.
S11, photovoltaic module export electric energy with peak power output, and the real-time output power value of photovoltaic is transferred to control mould
Block.
S12, judge whether the real-time output power of photovoltaic is greater than the rated power of load.
S13, if more than then control module controls photovoltaic electric energy according to the rated power of load and is negative load power supply, and will remain
Remaining photovoltaic electric energy is filled with battery group.
If S14, being not more than, controlling alternating current complementary module is load supplying.
For step S10, rapid perturbations method is the duty ratio D that natatorium changes the PWM of DC-DC module in photovoltaic module,
The corresponding real output size of different duty ratio (D+x and D-x) is compared, looks for the duty ratio of output power, then with this
Left and right disturbance on the basis of duty ratio, the final peak power output for determining photovoltaic module.
The peak power output of photovoltaic module is changed as the power of sunlight changes, theoretically in 0~1000W
The strong and weak variation of variation, sunlight causes the input power of photovoltaic DC/DC module unstable, therefore first to determine photovoltaic module reality
When peak power output, then controller by adjusting make photovoltaic module with peak power output export photovoltaic electric energy, protect
The normal table operation of card load.
With reference to Fig. 3, step S10 includes:
The duty ratio of S101, the quickly PWM in change photovoltaic module.
S102, the output power size for comparing different duty, find out the duty ratio of output power.
S103, the left and right disturbance centered on the duty ratio, determine the maximum power of photovoltaic module.
Specifically, step S101-S103 can be quick for the specific steps of the peak power output of determining photovoltaic module,
The efficient peak power output for determining photovoltaic module.
For step S11, after the real-time peak power output of photovoltaic module has been determined, pass through boost-buck electricity
Road efficiently exports photovoltaic electric energy, and the parameters such as the real-time output power value of photovoltaic, photovoltaic voltage and photovoltaic electric current are logical by number
Communication interface is passed to control module, is specifically adjusted by control module.
For step S12, because the output power of photovoltaic power generation is influenced by current sunlight intensity, output power can go out
Now float, it is possible that output power be greater than load rated power, or less than load rated power the case where, when big
Yu Shi, extra electric energy just will appear waste, and when being less than, then may result in load can not work normally.Therefore elder generation is needed
Photovoltaic output power is judged, judges whether it is greater than the rated power of load.
The specified function of load will exceed when photovoltaic output power is greater than the rated power of load for step S13
The electric energy of rate part is first stored in battery group, in case it is subsequent when can not carry out photovoltaic power generation using in battery group
The electric energy load that is negative is powered, the normal use of proof load.Specific load is DC load, such as with direct current property
RED lamps and lanterns or DC magnet ring lamp.Above-mentioned RED lamps and lanterns and DC magnet ring lamp are only two kinds of the load that may be used, are being actually used
When, it can be according to the load for needing to select other suitable of usage scenario.
For step S14, when rated power of the photovoltaic output power no more than load, photovoltaic output power can not
The normal work of holding load, it is single to use photovoltaic output power that load be made to work normally, control module control is needed at this time
Alternating current complementary module processed is load supplying, and proof load is unglazed or low smooth weather can be used normally at the cloudy day etc..
This programme uses the mode of photovoltaic power generation cooperation battery group for load supplying, and cleaning is reliable, and obtains conveniently；Together
When can directly be supplemented, be avoided the occurrence of by alternating current in the case where photovoltaic power generation is unstable by alternating current complementary module
The case where load short of electricity can not work.
With reference to Fig. 4, in an alternative embodiment of the invention, a kind of high-efficiency photovoltaic control method, the upper embodiment the step of
Further include having following steps after S14:
S15, the voltage value for detecting battery group.
S16, judge whether voltage value is less than preset value.
If S17, being less than, controlling alternating current complementary module is battery charging.
For step S14, the voltage value of battery group is checked, battery group power consumption is more, and device voltage value is lower, energy
Enough judge whether battery group is in without electricity or low electricity condition by the size of voltage value.
For step S15, after detecting specific voltage value, voltage value is compared with preset value, preset value
According to the setting of the actual parameters such as the type, model and capacity of battery group, to be preset at the beginning when the voltage value of detection is less than
When value, represents battery group and be in low electricity or electroless state, it can not normal power supply.
For step S16, alternating current complementary module can be load supplying under the control of control module, or electric power storage
Group power supply in pond also can be simultaneously load and the power supply of battery group.
In a specific embodiment of the invention, preset value 24V.When the voltage of battery group is 23V, control module control
Alternating current complementary module processed is opened, and initial charge voltage is initially 22V, is slowly adjusted to 25V in 5 minutes, then stablizes constant
For battery charging；When accumulator battery voltage is charged to 27.5V, alternating current complementary module is closed, and completes charging；Control mould
The battery that block records simultaneously is continuously in the time of low-voltage state (lower than 24V).
This programme uses the mode of photovoltaic power generation cooperation battery group for load supplying, and cleaning is reliable, and obtains conveniently；Together
When can directly be supplemented, be avoided the occurrence of by alternating current in the case where photovoltaic power generation is unstable by alternating current complementary module
The case where load short of electricity can not work.
The above description is only a preferred embodiment of the present invention, is not intended to limit the scope of the invention, all utilizations
Equivalent structure or equivalent flow shift made by description of the invention and accompanying drawing content is applied directly or indirectly in other correlations
Technical field, be included within the scope of the present invention.
Claims (5)
1. a kind of high-efficiency photovoltaic control method, which comprises the following steps:
Using rapid perturbations method, the peak power output of photovoltaic module is determined；
Photovoltaic module exports electric energy with peak power output, and the real-time output power value of photovoltaic is transferred to control module；
Judge whether the real-time output power of photovoltaic is greater than the rated power of load；
If more than then control module controls photovoltaic electric energy according to the rated power of load and is negative load power supply, and by remaining photovoltaic
Electric energy is filled with battery group；
If being not more than, controlling alternating current complementary module is load supplying.
2. a kind of high-efficiency photovoltaic control method as described in claim 1, which is characterized in that the control module is according to load
It is load supplying that rated power, which controls electric energy, and after remaining photovoltaic electric energy is filled with battery group step, including,
Detect the voltage value of battery group；
Judge whether voltage value is less than preset value；
If being less than, controlling alternating current complementary module is battery charging.
3. a kind of high-efficiency photovoltaic control method as described in claim 1, which is characterized in that it is described to use rapid perturbations method, really
Determine the peak power output step of photovoltaic module, including,
Quickly change the duty ratio of the PWM in photovoltaic module；
The output power size for comparing different duty finds out the duty ratio of output power；
Left and right disturbance, determines the maximum power of photovoltaic module centered on the duty ratio.
4. a kind of high-efficiency photovoltaic control method as claimed in claim 2, which is characterized in that the preset value is 24V.
5. a kind of high-efficiency photovoltaic control method as described in claim 1, which is characterized in that the load is DC load.
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| CN201810753071.7A CN108964238A (en) | 2018-07-10 | 2018-07-10 | High-efficiency photovoltaic control method |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101931229A (en) * | 2010-05-31 | 2010-12-29 | 深圳市均益安联光伏系统工程有限责任公司 | Power supply system for direct-current high-efficiency solar-powered photovoltaic curtain wall |
| US20120062202A1 (en) * | 2010-09-13 | 2012-03-15 | Byeong-Seon Min | Apparatus and method for tracking maximum power point and method of operating grid-tied power storage system using the same |
| CN102880224A (en) * | 2012-10-26 | 2013-01-16 | 天津理工大学 | Double-mode maximum power point tracking (MPPT) method based on improved step length |
| CN103441566A (en) * | 2013-09-12 | 2013-12-11 | 重庆大学 | System and method for supplying power cooperatively by mains supply, photovoltaic cell and energy storage battery |
| CN106786490A (en) * | 2017-01-18 | 2017-05-31 | 西南交通大学 | Distributed DC microgrid energy control method |
-
2018
- 2018-07-10 CN CN201810753071.7A patent/CN108964238A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101931229A (en) * | 2010-05-31 | 2010-12-29 | 深圳市均益安联光伏系统工程有限责任公司 | Power supply system for direct-current high-efficiency solar-powered photovoltaic curtain wall |
| US20120062202A1 (en) * | 2010-09-13 | 2012-03-15 | Byeong-Seon Min | Apparatus and method for tracking maximum power point and method of operating grid-tied power storage system using the same |
| CN102880224A (en) * | 2012-10-26 | 2013-01-16 | 天津理工大学 | Double-mode maximum power point tracking (MPPT) method based on improved step length |
| CN103441566A (en) * | 2013-09-12 | 2013-12-11 | 重庆大学 | System and method for supplying power cooperatively by mains supply, photovoltaic cell and energy storage battery |
| CN106786490A (en) * | 2017-01-18 | 2017-05-31 | 西南交通大学 | Distributed DC microgrid energy control method |
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