CN108964100A - A kind of photovoltaic circuit control method and its device based on circuital current - Google Patents
A kind of photovoltaic circuit control method and its device based on circuital current Download PDFInfo
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- CN108964100A CN108964100A CN201810669640.XA CN201810669640A CN108964100A CN 108964100 A CN108964100 A CN 108964100A CN 201810669640 A CN201810669640 A CN 201810669640A CN 108964100 A CN108964100 A CN 108964100A
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- 238000000034 method Methods 0.000 title claims abstract description 23
- 238000001514 detection method Methods 0.000 claims description 12
- 230000005611 electricity Effects 0.000 claims description 12
- 238000007599 discharging Methods 0.000 claims description 6
- 229910001753 sapphirine Inorganic materials 0.000 claims description 6
- 239000003086 colorant Substances 0.000 claims description 3
- 238000010248 power generation Methods 0.000 abstract description 5
- 239000002699 waste material Substances 0.000 description 2
- SGHZXLIDFTYFHQ-UHFFFAOYSA-L Brilliant Blue Chemical compound [Na+].[Na+].C=1C=C(C(=C2C=CC(C=C2)=[N+](CC)CC=2C=C(C=CC=2)S([O-])(=O)=O)C=2C(=CC=CC=2)S([O-])(=O)=O)C=CC=1N(CC)CC1=CC=CC(S([O-])(=O)=O)=C1 SGHZXLIDFTYFHQ-UHFFFAOYSA-L 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 238000013082 photovoltaic technology Methods 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
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/28—Arrangements for balancing of the load in a network by storage of energy
- H02J3/32—Arrangements for balancing of the load in a network by storage of energy using batteries with converting means
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- H02J3/383—
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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
-
- 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
-
- 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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Charge And Discharge Circuits For Batteries Or The Like (AREA)
- Secondary Cells (AREA)
Abstract
The invention discloses a kind of photovoltaic circuit control method and its device based on circuital current.Judge whether the electric energy in current circuit is superfluous by acquired power network current, photovoltaic panel electric current and total load current, by superfluous power storage into battery, and the electric energy in battery is discharged when photovoltaic panel does not work, the wasting of resources caused by sending dump energy in power grid is avoided, the personal rate of photovoltaic power generation is improved.
Description
Technical field
The present invention relates to photovoltaic circuit control field, especially a kind of photovoltaic circuit control method based on circuital current and
Its device.
Background technique
Currently, with the development of photovoltaic technology, photovoltaic power generation using more and more extensive.In photovoltaic circuit system, electricity
It can be provided jointly by power grid and photovoltaic panel, since photovoltaic panel can only generate electricity on daytime, if loading the consumption to electric energy at this time
Deficiency, then electric energy caused by photovoltaic panel is superfluous.In the prior art, the method generallyd use is that monitoring load and photovoltaic panel supply
Extra electric energy is sent in power grid by the power or voltage of electricity when the electric energy surplus that photovoltaic panel generates.Though this method
The dump energy generated when so can be realized to photovoltaic panel work carries out flow-dividing control, but this will lead to the residue of photovoltaic panel generation
Waste of energy enables the personal rate of photovoltaic power generation low.Therefore a kind of method is needed to deposit extra electric energy when judging electric energy surplus
Storage is got up.
Summary of the invention
To solve the above problems, can effectively solve electric energy excessive in circuit the purpose of the present invention is to provide a kind of,
It can be improved a kind of photovoltaic circuit control method and its device based on circuital current of utilization rate of electrical in practical application.
Technical solution used by the present invention solves the problems, such as it is:
A kind of photovoltaic circuit control method based on circuital current, comprising the following steps:
Step A, obtain current total load current, power network current, photovoltaic panel electric current numerical value；
If step B, photovoltaic panel current values obtained by step A are not 0, execute step C and be set as putting by battery if 0
Electricity condition；
If step C, grid current value is added the absolute value greater than total load current value with the absolute value of photovoltaic panel current value,
Step D is executed, if being equal to the absolute value of total load current value, thens follow the steps A；
Step D, charged state is set by battery, executes step A.
Further, in step C, if power network current is added with the absolute value of the current value of photovoltaic panel is greater than total load current value
Absolute value, then thoroughly deserving for total load current is subtracted with the sum of the grid current value and the absolute value of photovoltaic panel current value
Out after battery charging current, step D is executed.
It further, further include LED light in the battery, after setting charged state for battery described in step D
It is further comprising the steps of:
Step D1, whether detection battery fills with, if having been filled with, stops charging and controlling LED light shiny red,
If underfill is persistently charged, LED light sapphirine is controlled；
Step D2, battery information display screen is sent to show.
Further, battery information described in step D2 includes charged state and current electric quantity, the battery-operated state
In charging, having been filled with and discharging, the current electric quantity is shown with percents.
A kind of photovoltaic circuit control device based on circuital current, including following device:
Electric current acquisition device: for obtain total load current, power network current, photovoltaic panel electric current numerical value；
Photovoltaic panel current detection means: if photovoltaic panel current values obtained by electric current acquisition device are not 0, starting current ratio
Compared with device, if 0, discharge condition is set by battery；
Electric current comparison unit: if grid current value is added greater than total load current value with the absolute value of photovoltaic panel current value
Absolute value executes starting storage battery control device, if being equal to the absolute value of total load current value, starting current acquisition device；
Accumulator control device: for setting charged state or discharge condition for battery.
Further, further include following device:
Battery charging current computing device: the size of current for calculating accumulator charging；
Accumulator electric quantity detection apparatus: for detecting the real-time charge condition of battery；
LED prompts lamp control device: controlling the bright different colours of LED according to charging situation when battery charges；
Battery information display device: acquired battery information is shown for carrying out in display screen.
A kind of photovoltaic circuit control device based on circuital current, the storage mould including control module and control store instruction
Block, control module read described instruction and execute following steps:
Step A, obtain current total load current, power network current, photovoltaic panel electric current numerical value；
If step B, photovoltaic panel current values obtained by step A are not 0, execute step C and be set as putting by battery if 0
Electricity condition；
If step C, grid current value is added the absolute value greater than total load current value with the absolute value of photovoltaic panel current value,
Step D is executed, if being equal to the absolute value of total load current value, thens follow the steps A；
Step D, charged state is set by battery, executes step A.
Further, in step C, if power network current is added with the absolute value of the current value of photovoltaic panel is greater than total load current value
Absolute value, then thoroughly deserving for total load current is subtracted with the sum of the grid current value and the absolute value of photovoltaic panel current value
Out after battery charging current, step D is executed.
It further, further include LED light in the battery, after setting charged state for battery described in step D
It is further comprising the steps of:
Step D1, whether detection battery fills with, if having been filled with, stops charging and controlling LED light shiny red,
If underfill is persistently charged, LED light sapphirine is controlled；
Step D2, battery information display screen is sent to show.
Further, battery information described in step D2 includes charged state and current electric quantity, the battery-operated state
In charging, having been filled with and discharging, the current electric quantity is shown with percents.
The beneficial effects of the present invention are: a kind of photovoltaic circuit control method based on circuital current that the present invention uses and its
Device, it is whether superfluous using the electric energy in photovoltaic circuit in total load current, power network current and photovoltaic panel electric current decision circuitry, and
And it introduces battery and superfluous electric energy is stored.Dump energy is transferred to the way in power grid to compared with the prior art,
Way of the invention effectively stores the electric energy generated in photovoltaic panel power generation process into battery, and stops generating electricity in photovoltaic panel
When send deposited electric energy in load and utilize, improve photovoltaic power generation and use by oneself rate, avoid the waste of resource, reach economical
Maximum revenue.
Detailed description of the invention
The invention will be further described with example with reference to the accompanying drawing.
Fig. 1 is a kind of logic chart of the photovoltaic circuit control method based on circuital current of the present invention；
Fig. 2 is the logic of battery starting charging in a kind of photovoltaic circuit control method based on circuital current of the present invention
Figure.
Specific embodiment
Referring to Fig.1, a kind of photovoltaic circuit control method based on circuital current of the invention, comprising the following steps:
Step A, obtain current total load current, power network current, photovoltaic panel electric current numerical value；
If step B, photovoltaic panel current values obtained by step A are not 0, execute step C and be set as putting by battery if 0
Electricity condition；
If step C, grid current value is added the absolute value greater than total load current value with the absolute value of photovoltaic panel current value,
Step D is executed, if being equal to the absolute value of total load current value, thens follow the steps A；
Step D, charged state is set by battery, executes step A.
Each current value is obtained described in above-mentioned steps A, is detected in the present embodiment using the alternating current of setting in circuit mutual
Sensor obtains, and to voltage and power is measured compared with the prior art, the device is complicated, and error is larger, high failure rate, and maintenance cost is high
The drawbacks of, present device setting is simple, and accuracy is high and failure rate is low, can quick and precisely obtain the electric current of each corresponding position
Value.
When photovoltaic panel electric current described in above-mentioned steps B is not 0, indicates that photovoltaic panel is generating electricity, be correspondingly 0 epoch
Table photovoltaic panel does not generate electricity.Since photovoltaic panel is to the dependence of daylight, photovoltaic panel can not work when no daylight, this
When battery in the electric energy that is stored generated dump energy when being photovoltaic panel work, improve the personal rate of photovoltaic panel.
Since the design of circuit now generally rationalizes, it is greater than power grid there is no the electric current needed for load and photovoltaic panel supplies
Electric current the case where, therefore the sum of absolute value of grid current value and photovoltaic panel current value and total load current in above-mentioned steps C
The absolute value of value only exist more than or equal to the case where, if more than generated energy surplus is then indicated, it is superfluous to need to be implemented step D drop
Power storage into battery, load oepration at full load is indicated if being equal to, there is no superfluous electric energy, therefore do not need to hold
Row step D, but step A is repeated, it can be timely responded to when total load current changes.
Further, in step C, if power network current is added with the absolute value of the current value of photovoltaic panel is greater than total load current value
Absolute value, then thoroughly deserving for total load current is subtracted with the sum of the grid current value and the absolute value of photovoltaic panel current value
Out after battery charging current, step D is executed.
With reference to Fig. 2, further, further includes LED light in the battery, be set as filling by battery described in step D
It is further comprising the steps of after electricity condition:
Step D1, whether detection battery fills with, if having been filled with, stops charging and controlling LED light shiny red,
If underfill is persistently charged, LED light sapphirine is controlled；
Step D2, battery information display screen is sent to show.
Wherein, it being filled in battery charging process by the expression of LED light shiny red, the expression of brilliant blue lamp is being charged,
And the battery information that will acquire is sent to display screen and shows, can intuitively observe the working condition of battery.
Wherein, in conjunction with the resulting charging current of above-mentioned steps C1, the calculation formula of the electricity of battery is
Wherein t0For the time started of charging, t is the charging end time, and U is battery voltage.
Content shown by display screen described in above-mentioned steps D2 further includes load total current value acquired in step A, light
Lie prostrate plate current value and grid current value.
Wherein, battery is former when the charging and discharging state of battery changes by two-way interlock relay and circuit connection
What is be first closed will disconnect all the way, avoid the same time charge and discharge of battery.
Further, battery information described in step D2 includes charged state and current electric quantity, the battery-operated state
In charging, having been filled with and discharging, the current electric quantity is shown with percents.
A kind of photovoltaic circuit control device based on circuital current, including following device:
Electric current acquisition device: for obtain total load current, power network current, photovoltaic panel electric current numerical value；
Photovoltaic panel current detection means: if photovoltaic panel current values obtained by electric current acquisition device are not 0, starting current ratio
Compared with device, if 0, discharge condition is set by battery；
Electric current comparison unit: if grid current value is added greater than total load current value with the absolute value of photovoltaic panel current value
Absolute value executes starting storage battery control device, if being equal to the absolute value of total load current value, starting current acquisition device；
Accumulator control device: for setting charged state or discharge condition for battery.
Further, further include following device:
Battery charging current computing device: the size of current for calculating accumulator charging；
Accumulator electric quantity detection apparatus: for detecting the real-time charge condition of battery；
LED prompts lamp control device: controlling the bright different colours of LED according to charging situation when battery charges；
Battery information display device: acquired battery information is shown for carrying out in display screen.
A kind of photovoltaic circuit control device based on circuital current, the storage mould including control module and control store instruction
Block, control module read described instruction and execute following steps:
Step A, obtain current total load current, power network current, photovoltaic panel electric current numerical value；
If step B, photovoltaic panel current values obtained by step A are not 0, execute step C and be set as putting by battery if 0
Electricity condition；
If step C, grid current value is added the absolute value greater than total load current value with the absolute value of photovoltaic panel current value,
Step D is executed, if being equal to the absolute value of total load current value, thens follow the steps A；
Step D, charged state is set by battery, executes step A.
Further, in step C, if power network current is added with the absolute value of the current value of photovoltaic panel is greater than total load current value
Absolute value, then thoroughly deserving for total load current is subtracted with the sum of the grid current value and the absolute value of photovoltaic panel current value
Out after battery charging current, step D is executed.
It further, further include LED light in the battery, after setting charged state for battery described in step D
It is further comprising the steps of:
Step D1, whether detection battery fills with, if having been filled with, stops charging and controlling LED light shiny red,
If underfill is persistently charged, LED light sapphirine is controlled；
Step D2, battery information display screen is sent to show.
Further, battery information described in step D2 includes charged state and current electric quantity, the battery-operated state
In charging, having been filled with and discharging, the current electric quantity is shown with percents.
The above, only presently preferred embodiments of the present invention, the invention is not limited to above embodiment, as long as
It reaches technical effect of the invention with identical means, all should belong to protection scope of the present invention.
Claims (10)
1. a kind of photovoltaic circuit control method based on circuital current, which comprises the following steps:
Step A, obtain current total load current, power network current, photovoltaic panel electric current numerical value；
If step B, photovoltaic panel current values obtained by step A are not 0, step C is executed, if 0, sets electric discharge shape for battery
State；
If step C, grid current value is added the absolute value greater than total load current value with the absolute value of photovoltaic panel current value, execute
Step D thens follow the steps A if being equal to the absolute value of total load current value；
Step D, charged state is set by battery, executes step A.
2. a kind of photovoltaic circuit control method based on circuital current according to claim 1, it is characterised in that: step C
In, if power network current is added the absolute value greater than total load current value with the absolute value of the current value of photovoltaic panel, with the electricity
After the absolute value that the sum of the absolute value of net current value and photovoltaic panel current value subtracts total load current obtains battery charging current,
Execute step D.
3. a kind of photovoltaic circuit control method based on circuital current according to claim 2, it is characterised in that: the storage
Further include LED light in battery, battery described in step D is set as further comprising the steps of after charged state:
Step D1, whether detection battery fills with, if having been filled with, stops charging and controls LED light shiny red, if not
It is full of, then persistently charges, control LED light sapphirine；
Step D2, battery information display screen is sent to show.
4. a kind of photovoltaic circuit control method based on circuital current according to claim 3, it is characterised in that: step D2
The battery information includes battery-operated state and current electric quantity, and the battery-operated state includes charging,
In being full of and discharging, the current electric quantity is shown with percents.
5. a kind of photovoltaic circuit control device based on circuital current, which is characterized in that including following device:
Electric current acquisition device: for obtain total load current, power network current, photovoltaic panel electric current numerical value；
Photovoltaic panel current detection means: if photovoltaic panel current values obtained by electric current acquisition device are not 0, starting current compares dress
It sets, if 0, sets discharge condition for battery；
Electric current comparison unit: if grid current value is added with the absolute value of photovoltaic panel current value is greater than the absolute of total load current value
Value executes starting storage battery control device, if being equal to the absolute value of total load current value, starting current acquisition device；
Accumulator control device: for setting charged state or discharge condition for battery.
6. a kind of photovoltaic circuit control device based on circuital current according to claim 5, which is characterized in that further include
Following device:
Battery charging current computing device: the size of current for calculating accumulator charging；
Accumulator electric quantity detection apparatus: for detecting the real-time charge condition of battery；
LED prompts lamp control device: controlling the bright different colours of LED according to charging situation when battery charges；
Battery information display device: acquired battery information is shown for carrying out in display screen.
7. a kind of photovoltaic circuit control device based on circuital current, which is characterized in that refer to including control module and storage control
The memory module of order, control module read described instruction and execute following steps:
Step A, obtain current total load current, power network current, photovoltaic panel electric current numerical value；
If step B, photovoltaic panel current values obtained by step A are not 0, step C is executed, if 0, sets electric discharge shape for battery
State；
If step C, grid current value is added the absolute value greater than total load current value with the absolute value of photovoltaic panel current value, execute
Step D thens follow the steps A if being equal to the absolute value of total load current value；
Step D, charged state is set by battery, executes step A.
8. a kind of photovoltaic circuit control method based on circuital current according to claim 7, it is characterised in that: step C
In, if power network current is added the absolute value greater than total load current value with the absolute value of the current value of photovoltaic panel, with the electricity
After the absolute value that the sum of the absolute value of net current value and photovoltaic panel current value subtracts total load current obtains battery charging current,
Execute step D.
9. a kind of photovoltaic circuit control method based on circuital current according to claim 8, it is characterised in that: the storage
Further include LED light in battery, set further comprising the steps of after charged state for battery described in step D:
Step D1, whether detection battery fills with, if having been filled with, stops charging and controls LED light shiny red, if not
It is full of, then persistently charges, control LED light sapphirine；
Step D2, battery information display screen is sent to show.
10. a kind of photovoltaic circuit control method based on circuital current according to claim 9, it is characterised in that: step
Battery information described in D2 includes charged state and current electric quantity, and the battery-operated state includes charging, having been filled with
In electric discharge, the current electric quantity is shown with percents.
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| CN201810669640.XA CN108964100B (en) | 2018-06-26 | 2018-06-26 | Photovoltaic circuit control method and device based on circuit current |
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| CN110701559A (en) * | 2019-11-08 | 2020-01-17 | 盐城师范学院 | Art design of campus solar LED landscape lamp |
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| US20180054064A1 (en) * | 2016-08-17 | 2018-02-22 | Solarcity Corporation | Smart main electrical panel for energy generation systems |
| CN107069790A (en) * | 2017-06-09 | 2017-08-18 | 中塔新兴通讯技术集团有限公司 | The system and method that a kind of synthesis energy saving is powered |
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| CN110701559A (en) * | 2019-11-08 | 2020-01-17 | 盐城师范学院 | Art design of campus solar LED landscape lamp |
| CN110701559B (en) * | 2019-11-08 | 2024-05-07 | 盐城师范学院 | Campus artistic solar LED landscape lamp |
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