CN111049380A - Three-port B3R power supply circuit based on MPPT technology - Google Patents
Three-port B3R power supply circuit based on MPPT technology Download PDFInfo
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- CN111049380A CN111049380A CN201911338897.8A CN201911338897A CN111049380A CN 111049380 A CN111049380 A CN 111049380A CN 201911338897 A CN201911338897 A CN 201911338897A CN 111049380 A CN111049380 A CN 111049380A
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- schottky diode
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- 238000005516 engineering process Methods 0.000 title abstract description 14
- 239000003990 capacitor Substances 0.000 claims abstract description 53
- 239000002184 metal Substances 0.000 claims description 3
- 238000000034 method Methods 0.000 claims description 3
- 229920000728 polyester Polymers 0.000 claims description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 3
- 238000011217 control strategy Methods 0.000 abstract description 3
- 238000010586 diagram Methods 0.000 description 5
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000001105 regulatory effect Effects 0.000 description 2
- 238000007599 discharging Methods 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/02—Conversion of dc power input into dc power output without intermediate conversion into ac
- H02M3/04—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
- H02M3/10—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M3/145—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M3/155—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/156—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators
- H02M3/158—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of output voltage or current, e.g. switching regulators including plural semiconductor devices as final control devices for a single load
- H02M3/1582—Buck-boost converters
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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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- 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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- 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)
- Dc-Dc Converters (AREA)
Abstract
A three-port B3R power supply circuit based on MPPT technology, comprising: inductor L1, inductor L2, inductor L3, capacitor Cin, capacitor Ct1, capacitor Cout1, capacitor Cout2, capacitor Cbus, Schottky diode D1, Schottky diode D2, Schottky diode D3, Schottky diode D4, PMOS transistor P1, PMOS transistor P2, PMOS transistor P3, NMOS transistor M1, NMOS transistor M2 and NMOS transistor M3. The invention has the following advantages: a high-power-density non-isolated three-port DC/DC Converter based on the MPPT technology is provided, the topology is B3R (Buck-Buck-Boost Converter), and the Converter has fewer power devices, so that the power density improvement and the high efficiency realization are facilitated. A two-degree-of-freedom control strategy based on B3R can be adopted to realize the free flow control of energy among three ports, namely a PV end, a battery end and a load end, in a photovoltaic-battery direct-current power system. The PV side or cell side to load side energy flow also has higher efficiency due to single stage power conversion. MPPT, battery management and bus voltage regulation can be realized simultaneously.
Description
Technical Field
The invention belongs to the technical field of solar cells, and particularly relates to a three-port B3R power supply circuit based on MPPT technology.
Background
The traditional S3R full-regulation method realizes repeated pulse load power supply, which leads to serious increase of the volume and weight of the power supply system. Pulsed loads can be powered from the primary bus, while avoiding the impact on the life of the storage battery, conventional fully regulated power subsystems must configure the windsurfing board, storage battery and PCU at peak power, resulting in as much as 80% of the remaining power waste (for 20% duty versus repeated pulsed power).
Disclosure of Invention
In order to solve the above problems, the present invention provides a three-port B3R power circuit based on MPPT technology, including: an inductor L1, an inductor L2, an inductor L3, a capacitor Cin, a capacitor Ct1, a capacitor Cout1, a capacitor Cout2, a capacitor Cbus, a Schottky diode D1, a Schottky diode D2, a Schottky diode D3, a Schottky diode D4, a PMOS tube P4, an NMOS tube M4 and an NMOS tube M4, wherein a first end of the capacitor Cin and a first end of the PMOS tube P4 are connected with an output end of the solar battery array, a second end of the capacitor Cin is grounded, a second end of the PMOS tube P4 is connected with the NMOS tube M4 and a first end of the NMOS tube M4 respectively, a second end of the NMOS tube M4 is connected with an anode of the Schottky diode D4, a cathode of the Schottky diode D4 is connected with a cathode of the Schottky diode D4, a first end of the inductor L2, a first end of the inductor Ct 8272, a first end of the Schottky diode D4, an anode of the Schottky diode D4 and an anode of the Schottky diode 4, and an anode of the capacitor Ct 4, and an anode of the Schottky diode 4, and an anode of the capacitor Ct, the second end of the inductor L2 is grounded, the second end of the NMOS tube M2 is connected to the anode of the schottky diode D3, the cathode of the schottky diode D3 is connected to the cathode of the schottky diode D4 and the first end of the inductor L3, the anode of the schottky diode D4 is grounded, the second end of the NMOS tube M3 is connected to the cathodes of the schottky diode D3 and the schottky diode D4, the second end of the inductor L1 is connected to the first end of the PMOS tube P2, the second end of the PMOS tube P2 is connected to the first end of the capacitor Cout1 and the storage battery, the second end of the capacitor Cout1 is grounded, the second end of the inductor L3 is connected to the first end of the PMOS tube P3, the second end of the PMOS tube P3 is connected to the capacitor Cout2 and the first end of the capacitor Cbus, and the second ends of the capacitor Cout2 and the capacitor Cbus are grounded.
Preferably, the Ct1 is a polyester metal film PM90 type capacitor.
Preferably, the inductance L1 is 60 μ H.
Preferably, the inductance L2 is 120 μ H.
Preferably, the inductance L3 is 120 μ H.
The invention has the following advantages:
(1) a high-power-density non-isolated three-port DC/DC Converter based on the MPPT technology is provided, the topology is B3R (Buck-Buck-Boost Converter), and the Converter has fewer power devices, so that the power density improvement and the high efficiency realization are facilitated.
(2) A two-degree-of-freedom control strategy based on B3R can be adopted to realize the free flow control of energy among three ports, namely a PV end, a battery end and a load end, in a photovoltaic-battery direct-current power system. The PV side or cell side to load side energy flow also has higher efficiency due to single stage power conversion.
(3) MPPT, battery management and bus voltage regulation can be realized simultaneously.
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 described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic diagram of a three-port B3R power circuit based on MPPT technology according to the present invention;
fig. 2 is a schematic diagram of a three-port B3R power circuit based on MPPT technology according to a first state of the present invention;
fig. 3 is a schematic diagram of a three-port B3R power circuit based on MPPT technology according to a second embodiment of the present invention;
fig. 4 is a schematic diagram of a third state of a three-port B3R power circuit based on MPPT technology according to the present invention;
fig. 5 is a diagram illustrating a fourth state of a three-port B3R power circuit based on MPPT technology 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 in conjunction with the following detailed description. It should be understood that the description is intended to be exemplary only, and is not intended to limit the scope of the present invention. Moreover, in the following description, descriptions of well-known structures and techniques are omitted so as to not unnecessarily obscure the concepts of the present invention.
Referring to fig. 1, in an embodiment of the present application, there is provided a three-port B3R power circuit based on MPPT technology, including: an inductor L1, an inductor L2, an inductor L3, a capacitor Cin, a capacitor Ct1, a capacitor Cout1, a capacitor Cout2, a capacitor Cbus, a Schottky diode D1, a Schottky diode D2, a Schottky diode D3, a Schottky diode D4, a PMOS tube P4, an NMOS tube M4 and an NMOS tube M4, wherein a first end of the capacitor Cin and a first end of the PMOS tube P4 are connected with an output end of the solar battery array, a second end of the capacitor Cin is grounded, a second end of the PMOS tube P4 is connected with the NMOS tube M4 and a first end of the NMOS tube M4 respectively, a second end of the NMOS tube M4 is connected with an anode of the Schottky diode D4, a cathode of the Schottky diode D4 is connected with a cathode of the Schottky diode D4, a first end of the inductor L2, a first end of the inductor Ct 8272, a first end of the Schottky diode D4, an anode of the Schottky diode D4 and an anode of the Schottky diode 4, and an anode of the capacitor Ct 4, and an anode of the Schottky diode 4, and an anode of the capacitor Ct, the second end of the inductor L2 is grounded, the second end of the NMOS tube M2 is connected to the anode of the schottky diode D3, the cathode of the schottky diode D3 is connected to the cathode of the schottky diode D4 and the first end of the inductor L3, the anode of the schottky diode D4 is grounded, the second end of the NMOS tube M3 is connected to the cathodes of the schottky diode D3 and the schottky diode D4, the second end of the inductor L1 is connected to the first end of the PMOS tube P2, the second end of the PMOS tube P2 is connected to the first end of the capacitor Cout1 and the storage battery, the second end of the capacitor Cout1 is grounded, the second end of the inductor L3 is connected to the first end of the PMOS tube P3, the second end of the PMOS tube P3 is connected to the capacitor Cout2 and the first end of the capacitor Cbus, and the second ends of the capacitor Cout2 and the capacitor Cbus are grounded.
As shown in fig. 1, the B3R power circuit includes three topologies, i.e., buck and super boost topologies between the solar cells and the bus bar, and super buck topologies between the solar cells and the bus bar, wherein the former buck topology and the super boost topology are used to provide power to the solar cells, and thus the input for control is derived from the power demand of the solar cells, and the super buck topology is built between the solar cells and the bus bar, and the input for control is the power demand of the load.
When the solar cell array is in a shadow condition, the solar cell array has no output, so that only a super buck circuit works at the moment, the topology is shown in fig. 2, and an inductor L3 is added to realize the volt-second balance of three inductors.
When the solar battery array is in a lighting condition and Vsa is larger than Vbat, the Buck works between the solar battery and the storage battery in the topology of B3R, the topology is shown in FIG. 3, the switch M2 is turned off, and M1 is in a regulating state, and whether the storage battery is charged or discharged is determined according to the output power of the solar battery array and the load power requirement.
When in light conditions, and Vsa < Vbat, the B3R topology operates with boost between the solar cell and the battery, and the topology is shown in fig. 4. The switch M1 is closed all the time, and the switch M2 is in the regulation state, ensures the charging of the storage battery, and determines whether the storage battery works in the charging state or the discharging state according to the output power of the solar battery and the requirement of the load power.
When in light condition, and Vsa ═ Vbat, then the topology of B3R operates between the solar cell and the battery DET, which topology is shown in fig. 5. The switch M1 is closed all the time, M2 is in an open state, and M3 is in a regulation state to ensure that the bus voltage is stable.
In the application example, the Ct1 is a polyester metal film PM90 type capacitor.
In the claimed embodiment, the inductance L1 is 60 μ H.
In the claimed embodiment, the inductance L2 is 120 μ H.
In the claimed embodiment, the inductance L3 is 120 μ H.
The invention has the following advantages:
(3) a high-power-density non-isolated three-port DC/DC Converter based on the MPPT technology is provided, the topology is B3R (Buck-Buck-Boost Converter), and the Converter has fewer power devices, so that the power density improvement and the high efficiency realization are facilitated.
(4) A two-degree-of-freedom control strategy based on B3R can be adopted to realize the free flow control of energy among three ports, namely a PV end, a battery end and a load end, in a photovoltaic-battery direct-current power system. The PV side or cell side to load side energy flow also has higher efficiency due to single stage power conversion.
(3) MPPT, battery management and bus voltage regulation can be realized simultaneously.
It is to be understood that the above-described embodiments of the present invention are merely illustrative of or explaining the principles of the invention and are not to be construed as limiting the invention. Therefore, any modification, equivalent replacement, improvement and the like made without departing from the spirit and scope of the present invention should be included in the protection scope of the present invention. Further, it is intended that the appended claims cover all such variations and modifications as fall within the scope and boundaries of the appended claims or the equivalents of such scope and boundaries.
Claims (5)
1. A three-port B3R power circuit based on MPPT technique is characterized by comprising: an inductor L1, an inductor L2, an inductor L3, a capacitor Cin, a capacitor Ct1, a capacitor Cout1, a capacitor Cout2, a capacitor Cbus, a Schottky diode D1, a Schottky diode D2, a Schottky diode D3, a Schottky diode D4, a PMOS tube P4, an NMOS tube M4 and an NMOS tube M4, wherein a first end of the capacitor Cin and a first end of the PMOS tube P4 are connected with an output end of the solar battery array, a second end of the capacitor Cin is grounded, a second end of the PMOS tube P4 is connected with the NMOS tube M4 and a first end of the NMOS tube M4 respectively, a second end of the NMOS tube M4 is connected with an anode of the Schottky diode D4, a cathode of the Schottky diode D4 is connected with a cathode of the Schottky diode D4, a first end of the inductor L2, a first end of the inductor Ct 8272, a first end of the Schottky diode D4, an anode of the Schottky diode D4 and an anode of the Schottky diode 4, and an anode of the capacitor Ct 4, and an anode of the Schottky diode 4, and an anode of the capacitor Ct, the second end of the inductor L2 is grounded, the second end of the NMOS tube M2 is connected to the anode of the schottky diode D3, the cathode of the schottky diode D3 is connected to the cathode of the schottky diode D4 and the first end of the inductor L3, the anode of the schottky diode D4 is grounded, the second end of the NMOS tube M3 is connected to the cathodes of the schottky diode D3 and the schottky diode D4, the second end of the inductor L1 is connected to the first end of the PMOS tube P2, the second end of the PMOS tube P2 is connected to the first end of the capacitor Cout1 and the storage battery, the second end of the capacitor Cout1 is grounded, the second end of the inductor L3 is connected to the first end of the PMOS tube P3, the second end of the PMOS tube P3 is connected to the capacitor Cout2 and the first end of the capacitor Cbus, and the second ends of the capacitor Cout2 and the capacitor Cbus are grounded.
2. The three-port B3R power supply circuit of claim 1, wherein the Ct1 is a polyester metal film PM90 type capacitor.
3. The three-port B3R power supply circuit of claim 1, wherein the inductance L1 is 60 μ H.
4. The three-port B3R power supply circuit of claim 1, wherein the inductance L2 is 120 μ H.
5. The three-port B3R power supply circuit of claim 1, wherein the inductance L3 is 120 μ H.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911338897.8A CN111049380A (en) | 2019-12-23 | 2019-12-23 | Three-port B3R power supply circuit based on MPPT technology |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911338897.8A CN111049380A (en) | 2019-12-23 | 2019-12-23 | Three-port B3R power supply circuit based on MPPT technology |
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| CN111049380A true CN111049380A (en) | 2020-04-21 |
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| CN201911338897.8A Pending CN111049380A (en) | 2019-12-23 | 2019-12-23 | Three-port B3R power supply circuit based on MPPT technology |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112350606A (en) * | 2020-09-17 | 2021-02-09 | 珠海格力电器股份有限公司 | Port control device and method of photovoltaic system and photovoltaic system |
| CN116317068A (en) * | 2023-05-19 | 2023-06-23 | 湖南第一师范学院 | BOOST-BUCK cascade type photovoltaic energy storage circuit and control system |
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2019
- 2019-12-23 CN CN201911338897.8A patent/CN111049380A/en active Pending
Patent Citations (4)
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112350606A (en) * | 2020-09-17 | 2021-02-09 | 珠海格力电器股份有限公司 | Port control device and method of photovoltaic system and photovoltaic system |
| CN116317068A (en) * | 2023-05-19 | 2023-06-23 | 湖南第一师范学院 | BOOST-BUCK cascade type photovoltaic energy storage circuit and control system |
| CN116317068B (en) * | 2023-05-19 | 2023-07-25 | 湖南第一师范学院 | BOOST-BUCK cascade type photovoltaic energy storage circuit and control system |
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Application publication date: 20200421 |