CN206292656U - A kind of solar maximum power point tracking control system - Google Patents
A kind of solar maximum power point tracking control system Download PDFInfo
- Publication number
- CN206292656U CN206292656U CN201621481541.1U CN201621481541U CN206292656U CN 206292656 U CN206292656 U CN 206292656U CN 201621481541 U CN201621481541 U CN 201621481541U CN 206292656 U CN206292656 U CN 206292656U
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- Prior art keywords
- buck
- circuits
- current monitoring
- maximum power
- voltage
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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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Abstract
The utility model discloses a kind of solar maximum power point tracking control system, including TL494 pulse-width modulation circuits, single chip control module, metal-oxide-semiconductor drive circuit, BUCK buck circuits and accessory power supply, accessory power supply and TL494 pulse-width modulation circuits, single chip control module and metal-oxide-semiconductor drive circuit are connected by electric wire, TL494 pulse-width modulation circuits are connected with metal-oxide-semiconductor drive circuit, metal-oxide-semiconductor drive circuit is connected with BUCK buck circuits, the output end of the BUCK buck circuits is connected with battery pack, and the input of BUCK buck circuits is connected with solar panel, the output end of the BUCK buck circuits is connected with sampling resistor, the sampling resistor is connected with voltage x current monitoring modular.The utility model controls solar panel to be in maximum power output state using MPPT maximum power point tracking algorithm, improves the efficiency of whole solar recharging system；12864 liquid crystal displays show the data such as charging current voltage in real time.
Description
Technical field
The utility model is related to power supply class technical field, specially a kind of solar maximum power point tracking control system.
Background technology
Traditional fuel energy is cut down day by day, and the harm that environment is caused is become increasingly conspicuous, while the whole world also has 20
Hundred million people cannot get normal energy supply.Sight regenerative resource is invested all in this when, the whole world, it is desirable to renewable energy
Source can change the energy resource structure of the mankind, maintain long-range sustainable development.Solar energy turns into people with its exclusive advantage
The focus of attention, increasing country comes into effect " sunlight program ", develops solar energy resources, seeks the new dynamic of economic development
Power.This project is exactly to improve the efficiency of photovoltaic power generation apparatus preferably to tackle demand of the future world to the energy.
Utility model content
The purpose of this utility model is to provide a kind of solar maximum power point tracking control system, to solve the above-mentioned back of the body
The low problem of the efficiency of the photovoltaic power generation apparatus of proposition in scape technology.
To achieve the above object, the utility model provides following technical scheme：A kind of solar maximum power point tracking control
System processed, including TL494 pulse-width modulation circuits, single chip control module, metal-oxide-semiconductor drive circuit, BUCK buck circuits and
Accessory power supply, the accessory power supply is with TL494 pulse-width modulation circuits, single chip control module and metal-oxide-semiconductor drive circuit by electricity
Line is connected, and the TL494 pulse-width modulation circuits are connected with metal-oxide-semiconductor drive circuit, and the metal-oxide-semiconductor drive circuit is cut with BUCK step-downs
Wave circuit is connected, and the output end of the BUCK buck circuits is connected with battery pack, and BUCK buck circuits input
End is connected with solar panel, and the output end of the BUCK buck circuits is connected with sampling resistor, the sampling resistor
Connected with voltage x current monitoring modular, the sampling resistor and voltage x current monitoring modular are in parallel with current monitoring feedback module,
The voltage x current monitoring modular output end is connected with single chip control module, the single chip control module output end with
12864 liquid crystal displays are connected, and described current monitoring feedback module one end is connected with single chip control module output end, the other end and
The input connection of BUCK buck circuits.
Preferably, the voltage x current monitoring modular uses ADS8688 chips, is the deposit of 8 passage single supply Approach by inchmeal
Device (SAR) analog-digital converter (ADC), handling capacity during its work supports automatically and manually two kinds of scan patterns up to 500kSPS
4 passages or 8 channel multiplexers and low excursion with temperature piece on 4.096V reference voltages.
Preferably, the current monitoring feedback module uses INA194 current sample chips, and INA194 is 16 electric current inspections
Survey device.
Preferably, the voltage x current monitoring modular, sampling resistor and current monitoring feedback module constitute closed feedback and return
Road.
Preferably, the single chip control module uses AT89C52 single-chip microcomputers, and the accessory power supply is auxiliary using LTC3114
Help power supply.
Compared with prior art, the beneficial effects of the utility model are：The utility model is calculated using MPPT maximum power point tracking
Method controls the solar panel to be in maximum power output state, improves the efficiency of whole solar recharging system；12864 liquid
Crystalline substance screen shows the data such as charging current voltage in real time, and the system has high precision, low in energy consumption, and circuit is simply easily realized, efficiency high,
Fireballing advantage, improves the efficiency of photovoltaic power generation apparatus, for economic development provides new power.
Brief description of the drawings
Fig. 1 is a kind of overall plan figure of solar maximum power point tracking control system of the utility model；
Fig. 2 is a kind of control flow chart of the conductance increment method of solar maximum power point tracking control system of the utility model；
Fig. 3 is a kind of pulse-width modulation circuit figure of solar maximum power point tracking control system of the utility model；
Fig. 4 is a kind of BUCK buck circuit figures of solar maximum power point tracking control system of the utility model；
Fig. 5 is a kind of LT1162 drive circuit figures of solar maximum power point tracking control system of the utility model.
In figure：1- voltage x currents monitoring modular, 2- current monitorings feedback module, 3- sampling resistors, 4-BUCK buck choppers
Circuit, 5- solar panels, 6- battery packs, 7-MOS tube drive circuits, 8- accessory power supplys, 9-TL494 pulse-width modulation circuits,
10- single chip control modules, 11-12864 liquid crystal displays.
Specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment for being obtained, belongs to the scope of the utility model protection.
Maximum power tracking method of the present utility model is using the wink that conductance increment method is by comparing photovoltaic battery array
When impedance and impedance variable quantity method complete the tracking of maximum power point.
Reach the condition of maximum power point, i.e., when the variable quantity of output conductance is equal to the negative value of output conductance, photovoltaic electric
Pond array works in maximum power point.In radiation intensity and temperature change, the output voltage of photovoltaic battery array can be chased after steadily
With the change of environment, and output voltage fluctuation is small.
Conductance increment method makes photovoltaic battery array stabilization in maximum power point by setting the change threshold of some very littles
In neighborhood, rather than around maximum power point Pitching.When external environment changes, it is transitioned into separately from a stable state
During an outer stable state, conductance increment method can just make correct judgement according to the change of electric current, without observing that as disturbance
There is erroneous judgement in sample.
Refer to Fig. 1-5, a kind of embodiment that the utility model is provided：A kind of solar maximum power point tracing control system
System, including TL494 pulse-width modulation circuits 9, single chip control module 10, metal-oxide-semiconductor drive circuit 7, the and of BUCK buck circuits 4
Accessory power supply 8, accessory power supply 8 passes through with TL494 pulse-width modulation circuits 9, single chip control module 10 and metal-oxide-semiconductor drive circuit 7
Electric wire is connected, and TL494 pulse-width modulation circuits 9 connect with metal-oxide-semiconductor drive circuit 7, metal-oxide-semiconductor drive circuit 7 and BUCK buck choppers
Circuit 4 is connected, and the output end of BUCK buck circuits 4 is connected with battery pack 6, and BUCK buck circuits 4 input
It is connected with solar panel 5, the output end of BUCK buck circuits 4 is connected with sampling resistor 3, sampling resistor 3 and voltage
Current monitoring module 1 is connected, and sampling resistor 3 and voltage x current monitoring modular 1 are in parallel with current monitoring feedback module 2, voltage electricity
The stream output end of monitoring modular 1 is connected with single chip control module 10, the output end of single chip control module 10 and 12864 liquid crystal displays 11
Connection, one end of current monitoring feedback module 2 is connected with the output end of single chip control module 10, and the other end is electric with BUCK buck choppers
The input connection on road 4.
Voltage x current monitoring modular 1 uses ADS8688 chips, is 8 passage single supply successive approximation register (SAR) moduluses
Converter (ADC), handling capacity during its work supports automatically and manually two kinds of 4 passages or 8 of scan pattern up to 500kSPS
4.096V reference voltages on the piece of channel multiplexer and low excursion with temperature, when being powered using 5V single analog power supplys, device
Each input channel on part can support ± 10.24V, ± 5.12V and ± 2.56V the bipolar input range of reality and
The monopole input range of 0V to 10.24V and 0V to 5.12V.Gain of the AFE(analog front end) in all input ranges is passed through
Precise fine-adjustment is crossed, to ensure DC precision high.The selection of input range can be programmed by software, each passage input range
Selection it is separate, output protection voltage is up to ± 20 V, low-power consumption 65mW, with fabulous performance, with precision（Differentiate
Rate）Height, speed is fast, advantage low in energy consumption.
Current monitoring feedback module 2 uses INA194 current sample chips, and INA194 is 16 current detectors, common mode electricity
Pressure 16 ~ 80v of scope, in whole operating temperature range, error is less than 3%；Bandwidth is up to 500kHz；Quiescent current maximum
900uA；Output voltage is proportional to detection electric current, and detection current range is big；Internal amplifier is exported close to supply voltage：It is poor with V+
0.1V, 3mV poor with GND；- 45 °C to+125 °C of operating temperature range；It is low in energy consumption with high precision, what circuit was simply easily realized
Advantage.
Voltage x current monitoring modular 1, sampling resistor 3 and current monitoring feedback module 2 constitute closed feedback loop.
Single chip control module 10 uses AT89C52 single-chip microcomputers, and AT89C52 is a low-voltage, high-performance CMOS 8
Single-chip microcomputer, piece include 8k bytes can be repeatedly erasable Flash read-only program memories and 256 bytes arbitrary access number
According to memory（RAM）, device is using high density, nonvolatile storage technologies production, compatibility standard MCS-51 instruction systems, in piece
General 8 central processing units and Flash memory cell are put, AT89C52 has 40 pins, 32 outside two directions' inputing/outputs
(I/O) port, while including 2 outer middle fractures, 3 16 programmer timing counters, 2 full duplex serial communication ports, 2
Individual read-write mouth line, AT89C52 can conventionally be programmed, it is also possible to online programming.It is by general microprocessor
It is combined together with flash storage, flash storage that particularly can be repeatedly erasable can be effectively reduced development cost.
Accessory power supply 8 uses LTC3114 accessory power supplys, and LTC3114 is programmable output current DC/DC converters, output
Voltage can be below or above input voltage.The v of input voltage range 2.2 to 40 v, output voltage range 2.7V to 40V, output electricity
Stream is up to 1A.Efficiency high complies fully with the requirement powered to system various pieces up to 96%.
TL494 in TL494 pulse-width modulation circuits 9 of the present utility model is a kind of voltage driven type pulsewidth of function admirable
Modulation device, is integrated with complete pulse-width modulation circuit, is widely used in single-end ortho-exciting double hose, semibridge system, full-bridge type switch
Power supply, built-in linear saw-toothed oscillator, two error amplifiers, 5V reference data voltage source power transistors can be provided
The driving force of 500mA；External oscillating element only two（One resistance and an electric capacity）, can adjust Dead Time.Pass through
TL494 can accurately and quickly export the PWM ripples of coincident circuit, so as to control switch and the conducting of metal-oxide-semiconductor, realize topic requirements
Bi-directional DC-DC circuit, realize the adjustment of precision current voltage and output, strong with adjustability, operation interval is big, small volume,
Lightweight advantage.
BUCK buck circuits 4 of the present utility model are one of basic DC-DC circuits, for the drop of DC-to-DC
Buckling is changed, with efficiency high, the characteristics of simple structure.
Metal-oxide-semiconductor drive circuit 7 of the present utility model uses LT1162 power MOSFET drivers, and LT1162 is cost effect
Beneficial type semibridge system/full-bridge type N-channel power MOSFET driver.Can be the raster data model of top N-channel MOS FET to higher than negative
Carry HV supply voltages.Conversion time is 180ns, and internal logic circuit can prevent from being input into the power being also turned in half-bridge
MOSFET.Its unique adaptive guard circuit for being directed to perforation electric current eliminates and whole matchings of two MOSFET is required.It is interior
Portion's logic circuit can prevent from being input into the power MOSFET being also turned in half-bridge.Its unique adaptive guard for being directed to perforation electric current
Circuit eliminates and whole matchings of two MOSFET is required, with efficiency high, speed is fast, the extremely low advantage of power consumption.
Specifically used mode：In utility model works, charging circuit is that battery pack 6 is charged using solar energy,
Control circuit part improves the efficiency that luminous energy changes into electric energy, single chip control module 10 by carrying out MPPT maximum power point tracking
Using AT89C52 single-chip microcomputers, voltage and the voltage of electric current and battery to solar panel 5 are acquired analysis；And profit
PWM duty cycle, the constant charge voltage of control BUCK buck circuits 4, so as to realize are adjusted with MPPT maximum power point tracking algorithm
To the charge control of battery.
It is obvious to a person skilled in the art that the utility model is not limited to the details of above-mentioned one exemplary embodiment, and
And in the case of without departing substantially from spirit or essential attributes of the present utility model, can in other specific forms realize that this practicality is new
Type.Therefore, no matter from the point of view of which point, embodiment all should be regarded as exemplary, and is nonrestrictive, this practicality is new
The scope of type limits by appended claims rather than described above, it is intended that the equivalency fallen in claim is contained
All changes in justice and scope are included in the utility model.Any reference in claim should not be considered as limitation
Involved claim.
Claims (5)
1. a kind of solar maximum power point tracking control system, including TL494 pulse-width modulation circuits（9）, Single-chip Controlling mould
Block（10）, metal-oxide-semiconductor drive circuit（7）, BUCK buck circuits（4）And accessory power supply（8）, it is characterised in that：The auxiliary
Power supply（8）Respectively with TL494 pulse-width modulation circuits（9）, single chip control module（10）With metal-oxide-semiconductor drive circuit（7）By electricity
Line is connected, the TL494 pulse-width modulation circuits（9）With metal-oxide-semiconductor drive circuit（7）Series connection, the metal-oxide-semiconductor drive circuit（7）With
BUCK buck circuits（4）Series connection, the BUCK buck circuits（4）Output end and battery pack（6）Connection, and BUCK
Buck circuit（4）Input and solar panel（5）Connection, the BUCK buck circuits（4）Output end
It is connected with sampling resistor（3）, the sampling resistor（3）With voltage x current monitoring modular（1）Series connection, the sampling resistor（3）With
Voltage x current monitoring modular（1）With current monitoring feedback module（2）Parallel connection, the voltage x current monitoring modular（1）Output end with
Single chip control module（10）Connection, the single chip control module（10）Output end and 12864 liquid crystal displays（11）Connection, it is described
Current monitoring feedback module（2）One end and single chip control module（10）Output end is connected, the current monitoring feedback module（2）
The other end and BUCK buck circuits（4）Input connection.
2. a kind of solar maximum power point tracking control system according to claim 1, it is characterised in that：The voltage
Current monitoring module（1）Using ADS8688 chips.
3. a kind of solar maximum power point tracking control system according to claim 1, it is characterised in that：The electric current
Monitoring feedback module（2）Using INA194 current sample chips.
4. a kind of solar maximum power point tracking control system according to claim 1, it is characterised in that：The voltage
Current monitoring module（1）, sampling resistor（3）With current monitoring feedback module（2）Constitute closed feedback loop.
5. a kind of solar maximum power point tracking control system according to claim 1, it is characterised in that：The monolithic
Machine control module（10）Using AT89C52 single-chip microcomputers, the accessory power supply（8）Using LTC3114 accessory power supplys.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621481541.1U CN206292656U (en) | 2016-12-30 | 2016-12-30 | A kind of solar maximum power point tracking control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621481541.1U CN206292656U (en) | 2016-12-30 | 2016-12-30 | A kind of solar maximum power point tracking control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206292656U true CN206292656U (en) | 2017-06-30 |
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ID=59098678
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621481541.1U Expired - Fee Related CN206292656U (en) | 2016-12-30 | 2016-12-30 | A kind of solar maximum power point tracking control system |
Country Status (1)
| Country | Link |
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| CN (1) | CN206292656U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114977791A (en) * | 2022-05-06 | 2022-08-30 | 湖北美格新能源科技有限公司 | Solar energy MPPT voltage reduction means |
-
2016
- 2016-12-30 CN CN201621481541.1U patent/CN206292656U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114977791A (en) * | 2022-05-06 | 2022-08-30 | 湖北美格新能源科技有限公司 | Solar energy MPPT voltage reduction means |
| CN114977791B (en) * | 2022-05-06 | 2024-02-09 | 湖北美格新能源科技有限公司 | Solar MPPT voltage reduction device |
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170630 Termination date: 20171230 |
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| CF01 | Termination of patent right due to non-payment of annual fee |