CN109193906A - A kind of three level MPPT solar controllers - Google Patents
A kind of three level MPPT solar controllers Download PDFInfo
- Publication number
- CN109193906A CN109193906A CN201811288448.2A CN201811288448A CN109193906A CN 109193906 A CN109193906 A CN 109193906A CN 201811288448 A CN201811288448 A CN 201811288448A CN 109193906 A CN109193906 A CN 109193906A
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- Prior art keywords
- switch
- freewheeling diode
- level
- battery
- power supply
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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
-
- 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
-
- 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
- H02J7/0029—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits
- H02J7/0034—Circuit arrangements for charging or depolarising batteries or for supplying loads from batteries with safety or protection devices or circuits using reverse polarity correcting or protecting circuits
-
- 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)
- Life Sciences & Earth Sciences (AREA)
- Sustainable Development (AREA)
- Sustainable Energy (AREA)
- Physics & Mathematics (AREA)
- Electromagnetism (AREA)
- General Physics & Mathematics (AREA)
- Radar, Positioning & Navigation (AREA)
- Automation & Control Theory (AREA)
- Photovoltaic Devices (AREA)
Abstract
The present invention provides a kind of three level MPPT solar controllers; including load control and protection unit and the anti-reverse protection location of sequentially connected photo-voltaic power supply, photovoltaic, three level MPPT controller converter units, battery reverse connecting protection unit; battery reverse connecting protection unit is connect with battery, and load control and protection unit and battery reverse connecting protection unit, load connect；The damage that the anti-reverse protection location of photovoltaic is used to prevent photo-voltaic power supply reversal connection from causing solar controller；Three level MPPT controller converter units are for coordinating solar panel, battery, loaded work piece；Cell anti-reverse connects protection location for preventing reverse connection of accumulator from solar controller being caused to damage；Load control and protection unit is for preventing load abnormal from solar controller being caused to damage.The input voltage range that the present invention solves existing controller is narrow, and battery charge efficiency is low, the big problem of filtering device size.
Description
Technical field
The present invention relates to solar controller technical fields, more particularly to a kind of three level MPPT solar controllers.
Background technique
For solar battery as element important in photovoltaic generating system, major function is to convert the solar into electric energy,
It is used for rear class battery or load.For solar battery, output power-voltage characteristic be it is non-linear, in certain environment
Under the conditions of, there are a maximum power output, referred to as maximum power point (Maximun Power Point, MPP), maximum works
It is exactly to find solar battery most that rate point, which tracks (Maximun Power Point Tracking, MPPT) technology control system,
It is high-power, make solar cell working at maximum power point, to improve the transfer efficiency of solar battery.MPPT solar energy
Controller is suitable for the application of off-network solar recharging, it prevents from battery from being overcharged and being supported by solar modules excessively putting
Electricity.Controller uses intelligent-tracking algorithm, improves the energy obtained from photovoltaic module to the maximum extent, fills to battery
Electricity, meanwhile, low-voltage break function prevents battery over-discharge.Although MPPT controller on the market is many kinds of, deposit
It is narrow in input voltage range, the problems such as battery charge efficiency is low, and filtering device size is larger.
Summary of the invention
For overcome the deficiencies in the prior art, one of the objects of the present invention is to provide a kind of three level MPPT solar energy controls
Device processed, solves existing MPPT controller there are input voltage ranges narrow, and battery charge efficiency is low, and filtering device size is larger
The problem of.
The present invention provides one kind three level MPPT solar controllers, including the anti-reverse protection location of photo-voltaic power supply, photovoltaic,
Three level MPPT controller converter units, battery reverse connecting protection unit, load control and protection unit；
It is the photo-voltaic power supply, the anti-reverse protection location of the photovoltaic, the three level MPPT controller converter unit, described
Battery reverse connecting protection unit is sequentially connected, and the battery reverse connecting protection unit is connect with battery, and the load control protection is single
It is first to be connected with the battery reverse connecting protection unit, load；
The damage that the anti-reverse protection location of photovoltaic is used to prevent the photo-voltaic power supply reversal connection from causing solar controller；
The three level MPPT controller converter unit is for coordinating the solar panel, battery, described
The work of load；
The cell anti-reverse connects damage of the protection location for preventing the reverse connection of accumulator from causing solar controller；
The load control and protection unit is for preventing the load excessive, reversal connection, short circuit from causing solar controller
Damage.
Further, the three level MPPT controller converter unit uses tri- level translation of Buck of input and output altogether
Device.
Further, the Buck three-level converter includes first switch tube, second switch, striding capacitance, first
Freewheeling diode, the second freewheeling diode, filter inductance, filter capacitor, the photo-voltaic power supply, the first switch tube, second
Switching tube, filter inductance, filter capacitor form series loop, the load, first afterflow in parallel with the filter capacitor
The cathode of diode is connected between the second switch and the filter inductance, first freewheeling diode anode with
The cathode of second freewheeling diode connects, the anode of second freewheeling diode be connected to the filter capacitor with it is described
Between photo-voltaic power supply, the striding capacitance is connected between the first switch tube and the cathode of second freewheeling diode.
Further, the course of work of the three level MPPT controller converter unit includes four mode:
First mode: the first switch tube, second switch conducting, first freewheeling diode, the second afterflow two
Pole pipe shutdown, the photo-voltaic power supply provide energy, the electricity of filter inductance to load by the first switch tube, second switch
Stream rises, and output voltage rises；
Second mode: the first switch tube, the shutdown of the first freewheeling diode, the second switch, the second afterflow two
Pole pipe conducting, the striding capacitance by the second switch to load offer energy, the electric current linear decline of filter inductance,
Output voltage decline；
Third mode: the first switch tube, second switch conducting, first freewheeling diode, the second afterflow two
Pole pipe shutdown, the photo-voltaic power supply provide energy, the electricity of filter inductance to load by the first switch tube, second switch
Stream rises, and output voltage rises；
4th mode: the first switch tube, the conducting of the first freewheeling diode, the second switch, the second afterflow two
Pole pipe shutdown, the photo-voltaic power supply are charged by the first switch tube to the striding capacitance, the voltage of the striding capacitance
Rise, the electric current linear decline of filter inductance, output voltage decline.
Further, the voltage waveform between the first freewheeling diode cathode and second freewheeling diode anode
There are three level, and three level are respectively 0,1/2 photo-voltaic power supply voltage, photo-voltaic power supply voltage.
Further, the first switch tube, the second switch use Interleaved control mode, the duty of driving signal
Than identical, but 180 ° of phase phase difference.
Further, the first switch tube, the second switch are that metal-oxide-semiconductor field effect transistor, triode or insulated gate are double
Bipolar transistor.
Compared with prior art, the beneficial effects of the present invention are:
The present invention provides one kind three level MPPT solar controllers, including the anti-reverse protection location of photo-voltaic power supply, photovoltaic,
Three level MPPT controller converter units, battery reverse connecting protection unit, load control and protection unit；Photo-voltaic power supply, photovoltaic counnter attack
It connects protection location, three level MPPT controller converter units, battery reverse connecting protection unit to be sequentially connected, battery reverse connecting protection unit
It is connect with battery, load control and protection unit and battery reverse connecting protection unit, load connect；The anti-reverse protection location of photovoltaic is used
In the damage for preventing photo-voltaic power supply reversal connection from causing solar controller；Three level MPPT controller converter units are for coordinating the sun
Can solar panel, battery, load work；Cell anti-reverse connects protection location for preventing reverse connection of accumulator from causing solar control
The damage of device；Load control and protection unit is used to prevent load excessive, reversal connection, the short-circuit damage for causing solar controller.This
The switching tube of invention, the voltage stress of freewheeling diode are the half for inputting photovoltaic supply voltage, three obtained level voltages
Waveform is compared with traditional Buck MPPT controller, in same input/output condition, three level MPPT solar energy controls
The filter inductance of device processed reduces original 1/4, filter capacitor is reduced to original 1/2, the traditional MPPT of very good solution
The problem of controller low efficiency, filter element size be big and electromagnetic interference, supports the input voltage model of broader photo-voltaic power supply
It encloses, charging current ripple can be effectively reduced, reduce filter element size, improve charge efficiency and reduce complete machine ruler
It is very little.
The above description is only an overview of the technical scheme of the present invention, in order to better understand the technical means of the present invention,
And can be implemented in accordance with the contents of the specification, the following is a detailed description of the preferred embodiments of the present invention and the accompanying drawings.
A specific embodiment of the invention is shown in detail by following embodiment and its attached drawing.
Detailed description of the invention
The drawings described herein are used to provide a further understanding of the present invention, constitutes part of this application, this hair
Bright illustrative embodiments and their description are used to explain the present invention, and are not constituted improper limitations of the present invention.In the accompanying drawings:
Fig. 1 is three level MPPT solar controller topology diagram of one kind of the invention；
Fig. 2 is three level MPPT controller converter unit circuit topology figures of the embodiment of the present invention.
Specific embodiment
In the following, being described further in conjunction with attached drawing and specific embodiment to the present invention, it should be noted that not
Under the premise of conflicting, new implementation can be formed between various embodiments described below or between each technical characteristic in any combination
Example.
A kind of three level MPPT solar controllers, as shown in Figure 1, include photo-voltaic power supply, the anti-reverse protection location of photovoltaic,
Three level MPPT controller converter units, battery reverse connecting protection unit, load control and protection unit；
The anti-reverse protection location of photo-voltaic power supply, photovoltaic, three level MPPT controller converter units, battery reverse connecting protection unit
It is sequentially connected, battery reverse connecting protection unit is connect with battery, load control and protection unit and battery reverse connecting protection unit, load
Connection；In real work, the anti-reverse protection location of photovoltaic, three level MPPT controller converter units, battery reverse connecting protection unit,
Load control and protection unit is connect with system control unit, and system control unit is connect with segment encode screen display unit.
The damage that the anti-reverse protection location of photovoltaic is used to prevent photo-voltaic power supply reversal connection from causing solar controller；
Three level MPPT controller converter units be used for coordinate solar panel, battery, load work；
Cell anti-reverse connects damage of the protection location for preventing reverse connection of accumulator from causing solar controller；
Load control and protection unit is used to prevent load excessive, reversal connection, the short-circuit damage for causing solar controller.
In one embodiment, it is preferred that three level MPPT controller converter units use the Buck tri- of input and output altogether
Level converter.As shown in Figure 2, it is preferred that Buck three-level converter includes first switch tube, second switch, flies across electricity
Appearance, the first freewheeling diode, the second freewheeling diode, filter inductance, filter capacitor, in Fig. 2, photo-voltaic power supply is as input electricity
Source indicates that first switch tube is indicated with S1 with Uin, and second switch is indicated with S2, and striding capacitance is indicated with C2, the first afterflow
Diode indicates that the second freewheeling diode indicates that filter inductance is indicated with Lf with D2, and filter capacitor is indicated with C1, photovoltaic with D1
Power supply, first switch tube, second switch, filter inductance, filter capacitor form series loop, and load is in parallel with filter capacitor,
The cathode of first freewheeling diode is connected between second switch and filter inductance, the anode and second of the first freewheeling diode
The cathode of freewheeling diode connects, and the anode of the second freewheeling diode is connected between filter capacitor and photo-voltaic power supply, flies across electricity
Appearance is connected between first switch tube and the cathode of the second freewheeling diode.Preferably, first switch tube, second switch use
The duty ratio of Interleaved control mode, driving signal is identical, but 180 ° of phase phase difference.Preferably, first switch tube, second switch
For metal-oxide-semiconductor field effect transistor, triode or insulated gate bipolar transistor.Preferably, the work of three level MPPT controller converter units
Making process includes four mode:
First mode: first switch tube, second switch conducting, the first freewheeling diode, the shutdown of the second freewheeling diode,
Photo-voltaic power supply provides energy to load by first switch tube, second switch, and the electric current of filter inductance rises, on output voltage
It rises；
Second mode: first switch tube, the shutdown of the first freewheeling diode, second switch, the conducting of the second freewheeling diode,
Striding capacitance provides energy, the electric current linear decline of filter inductance, output voltage decline to load by second switch；
Third mode: first switch tube, second switch conducting, the first freewheeling diode, the shutdown of the second freewheeling diode,
Photo-voltaic power supply provides energy to load by first switch tube, second switch, and the electric current of filter inductance rises, on output voltage
It rises；
4th mode: first switch tube, the conducting of the first freewheeling diode, second switch, the shutdown of the second freewheeling diode,
Photo-voltaic power supply is charged by first switch tube to striding capacitance, and the voltage of striding capacitance rises, under the electric current of filter inductance is linear
Drop, output voltage decline.So far, the voltage waveform between the first freewheeling diode cathode and the second freewheeling diode anode has three
A level, three level are respectively 0,1/2 photo-voltaic power supply voltage, photo-voltaic power supply voltage.First switch tube, second switch,
One freewheeling diode, the second freewheeling diode voltage stress be the half of input voltage；Three electricity are obtained on output filter
Ordinary telegram corrugating, compared with traditional Buck MPPT controller, in same input/output condition, three level MPPT
The filter inductance of solar controller reduces original 1/4, and filter capacitor is reduced to original 1/2, has well solved biography
The problem of low efficiency of MPPT controller, the filter element size of uniting be big and electromagnetic interference, three level MPPT solar controllers
It can support the input voltage range of broader photo-voltaic power supply, can efficiently solve reduces charging current ripple, reduces filtering
Device size, to improve charge efficiency and reduce package size.
The present invention provides one kind three level MPPT solar controllers, including the anti-reverse protection location of photo-voltaic power supply, photovoltaic,
Three level MPPT controller converter units, battery reverse connecting protection unit, load control and protection unit；Photo-voltaic power supply, photovoltaic counnter attack
It connects protection location, three level MPPT controller converter units, battery reverse connecting protection unit to be sequentially connected, battery reverse connecting protection unit
It is connect with battery, load control and protection unit and battery reverse connecting protection unit, load connect；The anti-reverse protection location of photovoltaic is used
In the damage for preventing photo-voltaic power supply reversal connection from causing solar controller；Three level MPPT controller converter units are for coordinating the sun
Can solar panel, battery, load work；Cell anti-reverse connects protection location for preventing reverse connection of accumulator from causing solar control
The damage of device；Load control and protection unit is used to prevent load excessive, reversal connection, the short-circuit damage for causing solar controller.This
The switching tube of invention, the voltage stress of freewheeling diode are the half for inputting photovoltaic supply voltage, three obtained level voltages
Waveform is compared with traditional Buck MPPT controller, in same input/output condition, three level MPPT solar energy controls
The filter inductance of device processed reduces original 1/4, filter capacitor is reduced to original 1/2, the traditional MPPT of very good solution
The problem of controller low efficiency, filter element size be big and electromagnetic interference, supports the input voltage model of broader photo-voltaic power supply
It encloses, charging current ripple can be effectively reduced, reduce filter element size, improve charge efficiency and reduce complete machine ruler
It is very little.
More than, only presently preferred embodiments of the present invention is not intended to limit the present invention in any form；All current rows
The those of ordinary skill of industry can be shown in by specification attached drawing and above and swimmingly implement the present invention；But all to be familiar with sheet special
The technical staff of industry without departing from the scope of the present invention, is made a little using disclosed above technology contents
The equivalent variations of variation, modification and evolution is equivalent embodiment of the invention；Meanwhile all substantial technologicals according to the present invention
The variation, modification and evolution etc. of any equivalent variations to the above embodiments, still fall within technical solution of the present invention
Within protection scope.
Claims (7)
1. a kind of three level MPPT solar controllers, it is characterised in that: including photo-voltaic power supply, the anti-reverse protection location of photovoltaic,
Three level MPPT controller converter units, battery reverse connecting protection unit, load control and protection unit；
The photo-voltaic power supply, the anti-reverse protection location of the photovoltaic, the three level MPPT controller converter unit, the battery
Reverse connecting protection unit is sequentially connected, and the battery reverse connecting protection unit is connect with battery, the load control and protection unit with
The battery reverse connecting protection unit, load connection；
The damage that the anti-reverse protection location of photovoltaic is used to prevent the photo-voltaic power supply reversal connection from causing solar controller；
The three level MPPT controller converter unit is for coordinating the solar panel, the battery, the load
Work；
The cell anti-reverse connects damage of the protection location for preventing the reverse connection of accumulator from causing solar controller；
The load control and protection unit is used to prevent the load excessive, reversal connection, the short-circuit damage for causing solar controller.
2. three level MPPT solar controllers of one kind as described in claim 1, it is characterised in that: the three level MPPT control
Device converter unit processed uses the Buck three-level converter of input and output altogether.
3. three level MPPT solar controllers of one kind as claimed in claim 2, it is characterised in that: tri- level of Buck becomes
Parallel operation includes first switch tube, second switch, striding capacitance, the first freewheeling diode, the second freewheeling diode, filtered electrical
Sense, filter capacitor, the photo-voltaic power supply, the first switch tube, second switch, filter inductance, filter capacitor form series connection
Circuit, the load is in parallel with the filter capacitor, and the cathode of first freewheeling diode is connected to the second switch
Between the filter inductance, the anode of first freewheeling diode is connect with the cathode of second freewheeling diode, institute
The anode for stating the second freewheeling diode is connected between the filter capacitor and the photo-voltaic power supply, and the striding capacitance is connected to
Between the first switch tube and the cathode of second freewheeling diode.
4. three level MPPT solar controllers of one kind as claimed in claim 3, it is characterised in that: the three level MPPT control
The course of work of device converter unit processed includes four mode:
First mode: the first switch tube, second switch conducting, first freewheeling diode, the second freewheeling diode
Shutdown, the photo-voltaic power supply, which is given to load by the first switch tube, second switch, provides energy, on the electric current of filter inductance
It rises, output voltage rises；
Second mode: the first switch tube, the shutdown of the first freewheeling diode, the second switch, the second freewheeling diode
Conducting, the striding capacitance provide energy, the electric current linear decline of filter inductance, output to load by the second switch
Voltage decline；
Third mode: the first switch tube, second switch conducting, first freewheeling diode, the second freewheeling diode
Shutdown, the photo-voltaic power supply, which is given to load by the first switch tube, second switch, provides energy, on the electric current of filter inductance
It rises, output voltage rises；
4th mode: the first switch tube, the conducting of the first freewheeling diode, the second switch, the second freewheeling diode
Shutdown, the photo-voltaic power supply are charged by the first switch tube to the striding capacitance, and the voltage of the striding capacitance rises,
The electric current linear decline of filter inductance, output voltage decline.
5. three level MPPT solar controllers of one kind as claimed in claim 4, it is characterised in that: two pole of the first afterflow
There are three level for voltage waveform between pipe cathode and second freewheeling diode anode, and three level are respectively 0,1/2 light
Lie prostrate supply voltage, photo-voltaic power supply voltage.
6. three level MPPT solar controllers of one kind as claimed in claim 4, it is characterised in that: the first switch tube,
The second switch uses Interleaved control mode, and the duty ratio of driving signal is identical, but 180 ° of phase phase difference.
7. three level MPPT solar controllers of one kind as claimed in claim 6, it is characterised in that: the first switch tube,
The second switch is metal-oxide-semiconductor field effect transistor, triode or insulated gate bipolar transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811288448.2A CN109193906A (en) | 2018-10-31 | 2018-10-31 | A kind of three level MPPT solar controllers |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811288448.2A CN109193906A (en) | 2018-10-31 | 2018-10-31 | A kind of three level MPPT solar controllers |
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| Publication Number | Publication Date |
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| CN109193906A true CN109193906A (en) | 2019-01-11 |
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| CN201811288448.2A Pending CN109193906A (en) | 2018-10-31 | 2018-10-31 | A kind of three level MPPT solar controllers |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111697628A (en) * | 2020-07-09 | 2020-09-22 | 北京雷动智创科技有限公司 | Photovoltaic electrolyzed water hydrogen production system and control method |
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Application publication date: 20190111 |
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| RJ01 | Rejection of invention patent application after publication |