CN111030279A - Automatic control method of solar cell - Google Patents
Automatic control method of solar cell Download PDFInfo
- Publication number
- CN111030279A CN111030279A CN201911402870.0A CN201911402870A CN111030279A CN 111030279 A CN111030279 A CN 111030279A CN 201911402870 A CN201911402870 A CN 201911402870A CN 111030279 A CN111030279 A CN 111030279A
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- China
- Prior art keywords
- solar cell
- voltage
- inverter
- storage battery
- power generation
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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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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05F—SYSTEMS FOR REGULATING ELECTRIC OR MAGNETIC VARIABLES
- G05F1/00—Automatic systems in which deviations of an electric quantity from one or more predetermined values are detected at the output of the system and fed back to a device within the system to restore the detected quantity to its predetermined value or values, i.e. retroactive systems
- G05F1/66—Regulating electric power
- G05F1/67—Regulating electric power to the maximum power available from a generator, e.g. from solar cell
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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 invention discloses an automatic control method of a solar cell, which comprises the following steps: step S1, collecting the power generation voltage of the solar cell in real time, and sending the power generation voltage data to a control center; step S2, standard setting is carried out on the working voltage of the inverter and the working voltage of the storage battery, and the set working voltage data of the inverter and the set working voltage data of the storage battery are sent to a control center; in step S3, the solar cell power generation voltage is compared with the operating voltage of the inverter and the operating voltage of the battery, and the control center determines the power output target of the solar cell and the operating states of the inverter and the solar cell based on the comparison result. By implementing the invention, the voltage generated by the solar cell is controlled in a grading way, so that when the voltage generated by the solar cell is lower than the working voltage of the inverter, the power supply generated by the solar cell is introduced into the storage battery for storage, and the utilization rate of the solar cell is improved.
Description
Technical Field
The invention belongs to the field of solar cells, and relates to an automatic control method of a solar cell.
Background
The existing automatic operation stop control method of the solar battery controls the power generation of the solar battery through the working voltage range of the inverter, when the light intensity is gradually reduced, the voltage generated by the solar battery is gradually reduced, and when the voltage is smaller than the working voltage range of the inverter, the inverter stops working. When the light intensity is gradually increased, the voltage generated by the solar battery is gradually increased, when the voltage reaches the working voltage range of the inverter, the inverter starts to work, and the working voltage range of the inverter is determined, so that the electric quantity generated by the solar battery when the working voltage is lower than the working voltage of the inverter cannot be effectively utilized.
Disclosure of Invention
The technical problem to be solved by the embodiments of the present invention is to provide an automatic control method for a solar cell, which controls the voltage generated by the solar cell in a hierarchical manner, so that when the voltage generated by the solar cell is lower than the operating voltage of an inverter, the power generated by the solar cell is introduced into a storage battery for storage, thereby improving the utilization rate of the solar cell.
The invention provides an automatic control method of a solar cell, which comprises the following steps:
step S1, collecting the power generation voltage of the solar cell in real time, and sending the power generation voltage data to a control center;
step S2, standard setting is carried out on the working voltage of the inverter and the working voltage of the storage battery, and the set working voltage data of the inverter and the set working voltage data of the storage battery are sent to a control center;
in step S3, the control center compares the solar cell power generation voltage with the operating voltage of the inverter and the operating voltage of the storage battery, and determines the power output target of the solar cell and the operating states of the inverter and the solar cell based on the comparison result.
Specifically, the output end of the solar battery is respectively connected with the inverter and the storage battery.
Specifically, the operating voltage of the battery is lower than the operating voltage of the inverter.
Specifically, the determination of the power output target of the solar cell and the operating states of the inverter and the solar cell based on the result of the comparison is specifically,
when the power generation voltage of the solar battery is equal to the working voltage of the inverter, the inverter starts to work;
when the power generation voltage of the solar cell is equal to the working voltage of the storage battery, the inverter stops working, and meanwhile, the power generated by the solar cell is switched and input into the storage battery;
and when the power generation voltage of the solar cell is less than the working voltage of the storage battery, the solar cell stops running.
Specifically, when the inverter operates, the power stored in the battery is input to the inverter.
Specifically, the input voltage of the inverter includes 12V, 24V, 36V, and 48V.
The embodiment of the invention has the following beneficial effects:
the embodiment of the invention provides an automatic control method of a solar cell, which leads a power supply generated by the solar cell to be introduced into a storage battery for storage when the voltage generated by the solar cell is lower than the working voltage of an inverter by controlling the voltage generated by the solar cell in a grading way, thereby improving the utilization rate of the solar cell.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is within the scope of the present invention for those skilled in the art to obtain other drawings based on the drawings without inventive exercise.
Fig. 1 is a schematic main flow chart of an embodiment of an automatic control method for a solar cell according to the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention will be described in further detail with reference to the accompanying drawings.
As shown in fig. 1, which is a schematic main flow chart illustrating an embodiment of an automatic control method for a solar cell provided by the present invention, in this embodiment, the method includes the following steps:
step S1, collecting the power generation voltage of the solar cell in real time, and sending the power generation voltage data to a control center; the voltage data of the solar cell is arranged in real time, and the change condition of the voltage data is clear;
in a specific embodiment, the voltage of the solar cell is measured by a voltage measuring unit. For example, a combination of a shunt resistor and an AD converter connected in series with a solar cell or a voltage probe may be used as the voltage measuring unit. The voltage measured by the voltage measuring unit is transmitted to the control center. The control center has, for example, the following functions: the Maximum Power Point (MPP) of the solar cell is determined based on information about the voltage detected by the voltage detection unit, the voltage measured by the voltage measurement unit, the current measured by the current measurement unit, and the like.
The control center includes, for example, a CPU, ROM, main memory, and the like. Various functions of the control center are realized by a CPU that loads programs stored in a ROM or the like to a main memory and executes the loaded programs. However, part or all of the control center may be implemented by only hardware. Alternatively, the control center may be physically formed by a plurality of devices.
Step S2, standard setting is carried out on the working voltage of the inverter and the working voltage of the storage battery, and the set working voltage data of the inverter and the set working voltage data of the storage battery are sent to a control center; and setting a certain number of voltage data standard values with different gradients for comparing the power generation voltage of the solar battery with the working voltage of the inverter and the working voltage of the storage battery and realizing the basis of conversion and fault alarm.
In step S3, the control center compares the solar cell power generation voltage with the operating voltage of the inverter and the operating voltage of the storage battery, and determines the power output target of the solar cell and the operating states of the inverter and the solar cell based on the comparison result.
Further in a specific embodiment, the output ends of the solar cells are respectively connected with the inverter and the storage battery.
Further in a specific embodiment, the operating voltage of the accumulator is lower than the operating voltage of the inverter, the voltage being controlled by a load controller comprising for example a boost circuit or a buck circuit (DC-DC converter). The load controller has a function of equivalently changing the I-V characteristic (current-voltage characteristic) or the P-V characteristic (power-voltage characteristic) of the solar cell module. The load controller controls the output voltage of the solar cell so that the power generated by the solar cell becomes maximum. The battery is an object to which power is supplied from the solar battery via the load controller.
Further, in a specific embodiment, the determination of the power output object of the solar cell and the operation states of the inverter and the solar cell based on the result of the comparison is specifically,
when the power generation voltage of the solar battery is equal to the working voltage of the inverter, the inverter starts to work;
when the power generation voltage of the solar cell is equal to the working voltage of the storage battery, the inverter stops working, and meanwhile, the power generated by the solar cell is switched and input into the storage battery;
and when the power generation voltage of the solar cell is less than the working voltage of the storage battery, the solar cell stops running.
Further in a specific embodiment, the inverter is operated to input the power stored in the battery to the inverter.
Further, in a specific embodiment, the input voltage of the inverter includes 12V, 24V, 36V, 48V and other types of input voltages, and the operation voltage of the battery is lower than the operation voltage of the inverter, and the battery can normally operate if the operation voltage of the battery is lower than the operation voltage of the inverter.
For further details, reference may be made to the preceding description of the drawings, which are not described in detail herein.
The embodiment of the invention has the following beneficial effects:
the embodiment of the invention provides an automatic control method of a solar cell, which leads a power supply generated by the solar cell to be introduced into a storage battery for storage when the voltage generated by the solar cell is lower than the working voltage of an inverter by controlling the voltage generated by the solar cell in a grading way, thereby improving the utilization rate of the solar cell.
While the invention has been described in connection with what is presently considered to be the most practical and preferred embodiment, it is to be understood that the invention is not to be limited to the disclosed embodiment, but on the contrary, is intended to cover various modifications and equivalent arrangements included within the spirit and scope of the appended claims.
Claims (6)
1. An automatic control method of a solar cell is characterized by comprising the following steps:
step S1, collecting the power generation voltage of the solar cell in real time, and sending the power generation voltage data to a control center;
step S2, standard setting is carried out on the working voltage of the inverter and the working voltage of the storage battery, and the set working voltage data of the inverter and the set working voltage data of the storage battery are sent to a control center;
in step S3, the control center compares the solar cell power generation voltage with the operating voltage of the inverter and the operating voltage of the storage battery, and determines the power output target of the solar cell and the operating states of the inverter and the solar cell based on the comparison result.
2. The method of claim 1, wherein the output terminals of the solar cells are connected to an inverter and a battery, respectively.
3. The method of claim 2, wherein the operating voltage of the battery is lower than the operating voltage of the inverter.
4. The method according to claim 3, wherein the determination of the power output object of the solar cell and the operating states of the inverter and the solar cell is embodied as,
when the power generation voltage of the solar battery is equal to the working voltage of the inverter, the inverter starts to work;
when the power generation voltage of the solar cell is equal to the working voltage of the storage battery, the inverter stops working, and meanwhile, the power generated by the solar cell is switched and input into the storage battery;
and when the power generation voltage of the solar cell is less than the working voltage of the storage battery, the solar cell stops running.
5. The method of claim 4, wherein the inverter is operated to input power stored in the battery to the inverter.
6. The method of claim 1, wherein the input voltage of the inverter comprises 12V, 24V, 36V, 48V.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911402870.0A CN111030279A (en) | 2019-12-31 | 2019-12-31 | Automatic control method of solar cell |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911402870.0A CN111030279A (en) | 2019-12-31 | 2019-12-31 | Automatic control method of solar cell |
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| CN111030279A true CN111030279A (en) | 2020-04-17 |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203434638U (en) * | 2013-08-09 | 2014-02-12 | 深圳古瑞瓦特新能源股份有限公司 | Solar cell grid-connected power generation system |
| CN104882908A (en) * | 2015-05-25 | 2015-09-02 | 镇江市高等专科学校 | Intelligent micro-grid special inverter and control method thereof |
| CN105470992A (en) * | 2016-01-22 | 2016-04-06 | 杨敏杰 | Remaining electricity utilization system for solar or wind grid-connected power generation |
| CN105490306A (en) * | 2016-02-03 | 2016-04-13 | 合肥聚能新能源科技有限公司 | Photovoltaic energy storage grid-connected power supply system |
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2019
- 2019-12-31 CN CN201911402870.0A patent/CN111030279A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN203434638U (en) * | 2013-08-09 | 2014-02-12 | 深圳古瑞瓦特新能源股份有限公司 | Solar cell grid-connected power generation system |
| CN104882908A (en) * | 2015-05-25 | 2015-09-02 | 镇江市高等专科学校 | Intelligent micro-grid special inverter and control method thereof |
| CN105470992A (en) * | 2016-01-22 | 2016-04-06 | 杨敏杰 | Remaining electricity utilization system for solar or wind grid-connected power generation |
| CN105490306A (en) * | 2016-02-03 | 2016-04-13 | 合肥聚能新能源科技有限公司 | Photovoltaic energy storage grid-connected power supply system |
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Application publication date: 20200417 |