CN104467436B - Three-port direct-current converter device and hybrid modulation method and closed loop control method thereof - Google Patents
Three-port direct-current converter device and hybrid modulation method and closed loop control method thereof Download PDFInfo
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- CN104467436B CN104467436B CN201410700892.6A CN201410700892A CN104467436B CN 104467436 B CN104467436 B CN 104467436B CN 201410700892 A CN201410700892 A CN 201410700892A CN 104467436 B CN104467436 B CN 104467436B
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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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33515—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with digital control
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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
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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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33507—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
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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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/3353—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having at least two simultaneously operating switches on the input side, e.g. "double forward" or "double (switched) flyback" converter
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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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
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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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
- H02M3/33584—Bidirectional converters
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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
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
- H02M3/33592—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer having a synchronous rectifier circuit or a synchronous freewheeling circuit at the secondary side of an isolation transformer
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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)
- Inverter Devices (AREA)
Abstract
The invention discloses a three-port direct-current converter device and a hybrid modulation method and closed loop control method of the three-port direct-current converter device. The direct-current converter device comprises a main circuit and a control circuit, wherein the main circuit comprises a double-input full-bridge inverter, a high-frequency transformer, a half-bridge full-control rectifier and a voltage stabilization capacitor; the control circuit comprises a storage battery voltage sampling circuit, a storage battery current sampling circuit, a photovoltaic battery voltage sampling circuit, a photovoltaic battery current sampling circuit, a full-bridge inverter current sampling circuit and an output voltage sampling circuit, the output end of the storage battery voltage sampling circuit, the output end of the storage battery current sampling circuit, the output end of the photovoltaic battery voltage sampling circuit, the output end of the photovoltaic battery current sampling circuit, the output end of the full-bridge inverter current sampling circuit and the output end of the output voltage sampling circuit are connected to a digital signal processor, and the signal output end of the digital signal processor is connected with a first MOS transistor driving circuit, a second MOS transistor driving circuit, a third MOS transistor driving circuit, a fourth MOS transistor driving circuit, a fifth IGBT driving circuit and a sixth IGBT driving circuit. According to the three-port direct-current converter device, cost is saved, and the three-port direct-current converter device can be used in electrical equipment.
Description
Technical field
The present invention relates to a kind of DC converter, more particularly to a kind of multi-input direct current converter.
Background technology
Multi input power converter, its as a kind of new Technics of Power Electronic Conversion device, by new forms of energy and energy-storage travelling wave tube
Effectively combine, improve inverter power density, reliability and transient response speed.Photovoltaic cell is more as development and application
New forms of energy, there is that supply voltage is unstable, discontinuous, change with climate and weather condition, and maximum power output is straight
Receive intensity of illumination impact, with photovoltaic as input energy sources, be integrated with the multi input power converter of energy-storage travelling wave tube, export in photovoltaic
Power adjustments are carried out using energy-storage travelling wave tube during change, proof load while realizing that photovoltaic cell works in best operating point is needed
Ask.When multiple-energy-source input electric power converter topology structure choice is realized, in order to realize the energy transmission between different port, lead to
Power tube quantity can often be increased to realize energy Flow, so as to cause, transformer configuration is complicated, cost, control is complicated, can
Reduce by property.The multiplex analog circuit of phase-shift PWM coordinates DSP and FPGA to realize, these methods are present realizes complicated, control accuracy
The shortcomings of finite sum control function is single.
The content of the invention
It is an object of the invention to provide a kind of three-port DC converter device and its hybrid modulation method and closed loop control
Method, it is cost-effective, it is ensured that output voltage stabilizing and power flow control.
The object of the present invention is achieved like this：A kind of three-port DC converter device and its hybrid modulation method and close
Ring control method, the DC converter device include main circuit and control circuit：
Main circuit includes double-input full bridge inverter, high frequency transformer, half-bridge full-controlled rectifier device and electric capacity of voltage regulation C5；
The double-input full bridge inverter include first input port P-E, the second input port E-Q, output port A-B,
First filter capacitor C1, the second filter capacitor C2, the first inductance L1, the first metal-oxide-semiconductor S1, the second metal-oxide-semiconductor S2, the 3rd metal-oxide-semiconductor S3With
4th metal-oxide-semiconductor S4；First input port P-E accesses accumulator, and the second input port E-Q accesses photovoltaic cell, battery positive voltage
Electrode points P are accessed, battery terminal negative accesses electrode points E, and photovoltaic cell positive pole accesses electrode points E, and photovoltaic cell negative pole accesses electricity
Limit Q, concatenates the first filter capacitor C between electrode points P and electrode points E1, between electrode points E and electrode points Q, it is serially connected with the second filter
Ripple electric capacity C2, between electrode points P and electrode points A, concatenate the first metal-oxide-semiconductor S1, between electrode points A and electrode points Q, concatenate the second metal-oxide-semiconductor
S2, between electrode points P and electrode points B, concatenate the 3rd metal-oxide-semiconductor S3, between electrode points B and electrode points Q, concatenate the 4th metal-oxide-semiconductor S4, electricity
The first inductance L is serially connected between limit A and electrode points E1；
Half-bridge full-controlled rectifier device includes input port C-D, output port M-N, the 5th IGBT pipe S5, the 6th IGBT pipe S6,
Three filter capacitor C3And the 4th filter capacitor C4, between electrode points M and electrode points C, concatenate the 5th IGBT pipe S5, electrode points C and
The 6th IGBT pipe S are concatenated between electrode points N6, serial capacitance C between electrode points M and electrode points D3, electrode points D and electrode points N it
Between serial capacitance C4；
Electrode points A series connection leakage inductance LrIt is connected in the former limit of high frequency transformer with electrode points B afterwards, the secondary of high frequency transformer
On connection electrode point C and electrode points D；
The electric capacity of voltage regulation C5It is serially connected between electrode points M and electrode points N；
The control circuit includes the battery tension sample circuit that outfan is connected on digital signal processor, electric power storage
Pond current sampling circuit, photovoltaic cell voltage sampling circuit, photovoltaic cell current sampling circuit, full-bridge inverter current sample electricity
Road, output voltage sampling circuit, the signal output part of the digital signal processor be connected with the first metal-oxide-semiconductor drive circuit,
Two metal-oxide-semiconductor drive circuits, the 3rd metal-oxide-semiconductor drive circuit, the 4th metal-oxide-semiconductor drive circuit, the 5th IGBT tube drive circuits, the 6th
IGBT tube drive circuits；
The hybrid modulation method is as follows：By the first metal-oxide-semiconductor S1With the second metal-oxide-semiconductor S2Drive signal be set to complementation, pass through
Maximum power tracing algorithm calculates the first metal-oxide-semiconductor S1Dutycycle so that the 3rd metal-oxide-semiconductor S3With the 4th metal-oxide-semiconductor S4Drive signal
Complementary and the 3rd metal-oxide-semiconductor S3Dutycycle and the first metal-oxide-semiconductor S1It is identical, keep the first metal-oxide-semiconductor S1With the 3rd metal-oxide-semiconductor S3Between shifting
Phase angle is 180 ° so that the 5th IGBT pipe S5With the 6th IGBT pipe S6Drive signal it is complementary and dutycycle is 0.5, keep the
One metal-oxide-semiconductor S1With the 5th IGBT pipe S5Rising edge between keep certain phase shifting angle, and phase shifting angleMeet, wherein= ,= , δ is the first metal-oxide-semiconductor S1The high level midpoint of drive signal and the 5th metal-oxide-semiconductor S5
Phase shifting angle between the high level midpoint of drive signal,For the first metal-oxide-semiconductor S1Dutycycle,For the 5th IGBT pipe S5Account for
Empty ratio；
The closed loop control method is as follows, by adjusting the dutycycle of former limit dual input inverter, while realizing input light
The maximum power tracing of volt and the function of dual input inversion；It is by sampling to secondary half-bridge full-controlled rectifier device output voltage, and defeated
Go out voltage-target and relatively do after the recovery to give voltage controller, dutycycle/phase shifting angle manipulator is given in the output of voltage controller
Phase shifting angle of the half-bridge full-controlled rectifier device square-wave modulation signal relative to former limit square-wave modulation signal, phase shifting angle is obtained after being modulated
Scope is set to -90 ° ~ 90 °, by adjusting phase shifting angle controlled output voltage and power flow direction, two-way to transmit watt level
Can be controlled via voltage close loop output valve amplitude limit.
Compared with prior art, the beneficial effects of the present invention is, the present invention using the first metal-oxide-semiconductor, the second metal-oxide-semiconductor coordinate
First inductance can be as a step-up/step-down circuit, while the first metal-oxide-semiconductor, the second metal-oxide-semiconductor, the 3rd metal-oxide-semiconductor, the 4th metal-oxide-semiconductor coordinate
Reversion reaction is played, so as to save one group of metal-oxide-semiconductor, cost has been saved, by adjusting the dutycycle of former limit inverter, is realized
The maximum power tracing of photovoltaic, and ensure inverter circuit normal work, meanwhile, sampled by secondary output voltage, adjust former limit
The phase shifting angle of inverter and secondary commutator, realizes output voltage stabilizing and power flow control.The present invention can be used in photovoltaic generation.
Used as the further restriction of the present invention, the input of the photovoltaic cell voltage sampling circuit is connected to main circuit light
On volt battery input positive pole, the outfan of photovoltaic cell voltage sampling circuit is connected on digital signal processor, voltage signal
By exporting to digital signal processor after bleeder circuit partial pressure, then filtered capacitor filtering；The battery tension sample circuit
It is identical with photovoltaic cell voltage sampling circuit.
Used as the further restriction of the present invention, the input of the battery current sample circuit is serially connected in main circuit electric power storage
Pond is input between positive pole and accumulator, and the outfan of the battery current sample circuit is connected on digital signal processor,
Current signal is sampled Jing current sensor and is filtered Jing after partial pressure again, and filtered signal gives digital signal processor；Institute
State photovoltaic cell current sampling circuit and full-bridge inverter current sampling circuit is identical with battery current sample circuit.
Used as the further restriction of the present invention, the input of the output voltage sampling circuit is connected to main circuit electrode points
On M and electrode points N, the outfan of the output voltage sampling circuit is connected on digital signal processor, and voltage signal Jing is adopted
Sample resistance is converted into electric current, is amplified Jing after the conversion of Hall voltage transmitter, and Jing low-pressure side sampling resistors are converted into accordingly
Voltage, then low-pass filtered device exported to digital signal processor.
Used as the further restriction of the present invention, the digital signal processor adopts dsPIC33FJ64GS606 chips.
Description of the drawings
Fig. 1 is main circuit schematic diagram of the present invention.
Fig. 2 is control circuit module figure of the present invention.
Fig. 3 is photovoltaic cell voltage sampling circuit schematic diagram in the present invention.
Fig. 4 is battery current sample circuit schematic diagram in the present invention.
Fig. 5 is output voltage sampling circuit schematic diagram in the present invention.
Fig. 6 is former limit dutycycle D in the present inventionpThe waveform of each signal during more than 0.5.
Fig. 7 is former limit dutycycle D in the present inventionpThe waveform of each signal during less than 0.5.
Output voltage control logic schematic diagram during Fig. 8 is of the invention.
Specific embodiment
A kind of three-port DC converter device as shown in Figure 1-2, including main circuit and control circuit：
Main circuit includes double-input full bridge inverter, high frequency transformer, half-bridge full-controlled rectifier device and electric capacity of voltage regulation C5；
The main circuit includes double-input full bridge inverter, high frequency transformer, half-bridge full-controlled rectifier device and electric capacity of voltage regulation.
The double-input full bridge inverter includes port P-E, port E-Q, port A-B, filter capacitor C1, filter capacitor C2, inductance L1、
First metal-oxide-semiconductor S1, the second metal-oxide-semiconductor S2, the 3rd metal-oxide-semiconductor S3With the 4th metal-oxide-semiconductor S4；Double-input full bridge inverter double input end is distinguished
For accumulator terminal P-E and photovoltaic cell end E-Q, battery positive voltage access electrode points P, battery terminal negative access electrode points E, photovoltaic
Electrode points E are accessed after anode one protection diode of positive series connection, photovoltaic cell negative pole accesses electrode points Q, and accumulator is defeated
Enter and between positive pole P and electrode points E, be serially connected with filter capacitor C1, between electrode points E and photovoltaic cell input negative pole Q, it is serially connected with filtering
Electric capacity C2, between electrode points P and electrode points B, concatenate the 3rd metal-oxide-semiconductor S3, between electrode points B and electrode points Q, concatenate the 4th metal-oxide-semiconductor
S4, between electrode points P and electrode points A, concatenate the first metal-oxide-semiconductor S1, between electrode points A and electrode points Q, concatenate the second metal-oxide-semiconductor S2, MOS
Pipe S1With metal-oxide-semiconductor S2Between electrode points A and electrode points E between be serially connected with inductance L1, wherein inductance L1, the first metal-oxide-semiconductor S1, second
Metal-oxide-semiconductor S2But also as a step-up/step-down circuit, half-bridge full-controlled rectifier device includes port C-D, port M-N, the 5th IGBT pipe S5、
6th IGBT pipe S6, electric capacity C3And electric capacity C4, between electrode points M and electrode points C, concatenate the 5th IGBT pipe S5, electrode points C and electricity
The 6th IGBT pipe S are concatenated between limit N6, serial capacitance C between electrode points M and electrode points D3, between electrode points D and electrode points N
Serial capacitance C4.The high frequency transformer TrFormer limit and its series connection leakage inductance LrIt is connected to double-input full bridge inverter circuit electrode points A
In electrode points B, the high frequency transformer TrSecondary is connected on half-bridge full-controlled rectifier device circuit electrode point C and electrode points D.It is described
Electric capacity of voltage regulation C5It is serially connected between electrode points M and electrode points N, the digital signal processor adopts dsPIC33FJ64GS606 cores
Piece；Half-bridge full-controlled rectifier device includes input port C-D, output port M-N, the 5th IGBT pipe S5, the 6th IGBT pipe S6, the 3rd filter
Ripple electric capacity C3And the 4th filter capacitor C4, between electrode points M and electrode points C, concatenate the 5th IGBT pipe S5, electrode points C and electrode
The 6th IGBT pipe S are concatenated between point N6, serial capacitance C between electrode points M and electrode points D3, go here and there between electrode points D and electrode points N
Meet electric capacity C4；
Electrode points A series connection leakage inductance LrIt is connected in the former limit of high frequency transformer with electrode points B afterwards, the secondary of high frequency transformer
On connection electrode point C and electrode points D；
The electric capacity of voltage regulation C5It is serially connected between electrode points M and electrode points N；
The control circuit includes the battery tension sample circuit that outfan is connected on digital signal processor, electric power storage
Pond current sampling circuit, photovoltaic cell voltage sampling circuit, photovoltaic cell current sampling circuit, full-bridge inverter current sample electricity
Road, output voltage sampling circuit, the signal output part of the digital signal processor be connected with the first metal-oxide-semiconductor drive circuit,
Two metal-oxide-semiconductor drive circuits, the 3rd metal-oxide-semiconductor drive circuit, the 4th metal-oxide-semiconductor drive circuit, the 5th IGBT tube drive circuits, the 6th
IGBT tube drive circuits；The input of the photovoltaic cell voltage sampling circuit is connected to main circuit photovoltaic cell input positive pole E
On, the outfan of photovoltaic cell voltage sampling circuit is connected on digital signal processor, voltage signal by bleeder circuit partial pressure,
Export to digital signal processor after filtered capacitor filtering again；The battery tension sample circuit is adopted with photovoltaic cell voltage
Sample circuit is identical；The input of the battery current sample circuit is serially connected in main circuit accumulator input positive pole P and accumulator
Between, the outfan of the battery current sample circuit is connected on digital signal processor, current signal Jing current senses
Device U10 samplings are filtered Jing after partial pressure again, and filtered signal gives digital signal processor, and the photovoltaic cell electric current is adopted
Sample circuit and full-bridge inverter current sampling circuit are identical with battery current sample circuit；The output voltage sampling circuit
Input is connected in main circuit electrode points M and electrode points N, and the outfan of the output voltage sampling circuit is connected to digital letter
On number processor, the sampled resistance R15 of voltage signal is converted into the electric current that rated value is 25mA, and Jing Hall voltage transmitters U8 becomes
Amplified 0.4 times after changing, Jing low-pressure side sampling resistor R17 are converted into corresponding voltage, then Jing resistance R16 electric capacity C16 compositions
Low pass filter export to digital signal processor.
Main circuit operation principle proposed by the invention：Using asymmetric hybrid modulation method, as shown in Figure 6 and Figure 7, its
Sets forth the oscillogram when former limit full-bridge dutycycle is more than 0.5 with less than 0.5.Whereinv s1 、v s2 、v s3 、v s4 、v s1 、v s5 、v s6 Respectively the first metal-oxide-semiconductor S1, the second metal-oxide-semiconductor S2, the 3rd metal-oxide-semiconductor S3, the 4th metal-oxide-semiconductor S4, the 5th IGBT pipe S5, the 6th IGBT
Pipe S6Gate pole and respective grid between voltage waveform, it is stipulated that the upper and lower two power tube drive waveforms of each bridge arm are complementary pass
System, i.e.,v s1 Withv s2 Complementation,v s3 Withv s4 Complementation,v s5 Withv s6 Complementation, andv s1 Waveform high level midpoint is advancedv s3 In waveform high level
Point half switch periods, i.e. half switch periods of phase shift.v s1 Rising edge withv s5 Rising edge between there is phase shifting angle；v AB 、v CD
Respectively former limit inverter leg mid-point voltage and secondary half-bridge full-controlled rectifier device bridge arm mid-point voltage,i r For flowing through transformator
Electric current, DpFor the first metal-oxide-semiconductor S1With the 3rd metal-oxide-semiconductor S3Dutycycle, DsFor the 5th IGBT pipe S5Dutycycle, δ isv s1 Height electricity
Flat midpoint withv s5 High level midpoint between phase shifting angle,Forv s5 Rising edge withv s1 Rising edge between phase shifting angle.
From waveform analyses, when dutycycle Dp>0.5 and Dp<When 0.5, Dp、Ds、δ、Relation between ε is：
Dp>0.5
Dp<0.5
Work as DpWhen=0.5,=δ；
Regulation：
Can be obtained by above formula：
；
By relation above, can be according to current former limit dutycycle Dp, secondary dutycycle DsWithv s1 High level midpoint withv s5 High level midpoint between phase shifting angle δ, δ can which immediately arrives at by the voltage controller in digital signal processor, according to
Above-mentioned formula is calculatedv s5 Rising edge withv s1 Rising edge between phase shifting angle。
Output voltage control principle：As shown in figure 8, GvFor controlling phase shifting angle to output voltage VMNTransmission function, HvFor
The transmission function of output voltage sampling circuit.In output voltage VMNDuring control, the output δ of voltage controller isv s5 High level
Midpoint withv s1 High level midpoint between phase shifting angle, the output of dutycycle/phase shifting angle manipulatorForv s5 Rising edge withv s1 Rising edge between phase shifting angle, which can be according to the output δ of current voltage controller and accounting for for former limit full-bridge inverter
Sky compares DpWith secondary half-bridge full-controlled rectifier device dutycycle DSTo determine.The output δ controls of voltage controller between -90 °～90 °,
When normally powering to the load, the output δ of pressure controller between 0～90 °, if as output port rear class has energy back,
The output δ of pressure controller changes power flow direction between -90 °～0, that is, makes load charge to battery.By adjust δ come
Controlled output voltage and power flow direction, two-way watt level of transmitting can be controlled via voltage close loop output valve amplitude limit
System.
The closed loop control method is as follows, by adjusting the dutycycle of former limit dual input inverter, while realizing input light
The maximum power tracing of volt and the function of dual input inversion；It is by sampling to secondary half-bridge full-controlled rectifier device output voltage, and defeated
Go out voltage-target and relatively do after the recovery to give voltage controller, dutycycle/phase shifting angle manipulator is given in the output of voltage controller
Phase shifting angle of the half-bridge full-controlled rectifier device square-wave modulation signal relative to former limit square-wave modulation signal, phase shifting angle is obtained after being modulated
Scope is set to -90 ° ~ 90 °, by adjusting phase shifting angle controlled output voltage and power flow direction, two-way to transmit watt level
Can be controlled via voltage close loop output valve amplitude limit.
Above-described embodiment is the invention is not limited in, on the basis of technical scheme disclosed by the invention, the skill of this area
Art personnel are according to disclosed technology contents, it is not necessary to which performing creative labour just can make one to some of which technical characteristic
A little to replace and deform, these are replaced and deform within the scope of the present invention.
Claims (1)
1. a kind of three-port DC converter device hybrid modulation method, the DC converter device include main circuit and control
Circuit：
Main circuit includes double-input full bridge inverter, high frequency transformer, half-bridge full-controlled rectifier device and electric capacity of voltage regulation C5；
The double-input full bridge inverter include first input port P-E, the second input port E-Q, output port A-B, first
Filter capacitor C1, the second filter capacitor C2, the first inductance L1, the first metal-oxide-semiconductor S1, the second metal-oxide-semiconductor S2, the 3rd metal-oxide-semiconductor S3With the 4th
Metal-oxide-semiconductor S4；First input port P-E accesses accumulator, and the second input port E-Q accesses photovoltaic cell, and battery positive voltage is accessed
Electrode points P, battery terminal negative access electrode points E, and photovoltaic cell positive pole accesses electrode points E, and photovoltaic cell negative pole accesses electrode points
Q, concatenates the first filter capacitor C between electrode points P and electrode points E1, between electrode points E and electrode points Q, it is serially connected with the second filtered electrical
Hold C2, between electrode points P and electrode points A, concatenate the first metal-oxide-semiconductor S1, between electrode points A and electrode points Q, concatenate the second metal-oxide-semiconductor S2,
The 3rd metal-oxide-semiconductor S is concatenated between electrode points P and electrode points B3, between electrode points B and electrode points Q, concatenate the 4th metal-oxide-semiconductor S4, electrode points
The first inductance L is serially connected between A and electrode points E1；
Half-bridge full-controlled rectifier device includes input port C-D, output port M-N, the 5th IGBT pipe S5, the 6th IGBT pipe S6, the 3rd filter
Ripple electric capacity C3And the 4th filter capacitor C4, between electrode points M and electrode points C, concatenate the 5th IGBT pipe S5, electrode points C and electrode
The 6th IGBT pipe S are concatenated between point N6, serial capacitance C between electrode points M and electrode points D3, go here and there between electrode points D and electrode points N
Meet electric capacity C4；
Electrode points A series connection leakage inductance LrIt is connected in the former limit of high frequency transformer with electrode points B afterwards, the secondary connection of high frequency transformer
In electrode points C and electrode points D；
The electric capacity of voltage regulation C5It is serially connected between electrode points M and electrode points N；
The control circuit includes the battery tension sample circuit that outfan is connected on digital signal processor, storage battery
Stream sample circuit, photovoltaic cell voltage sampling circuit, photovoltaic cell current sampling circuit, full-bridge inverter current sampling circuit,
Output voltage sampling circuit, the signal output part of the digital signal processor be connected with the first metal-oxide-semiconductor drive circuit, second
Metal-oxide-semiconductor drive circuit, the 3rd metal-oxide-semiconductor drive circuit, the 4th metal-oxide-semiconductor drive circuit, the 5th IGBT tube drive circuits, the 6th IGBT
Tube drive circuit；Characterized in that, the hybrid modulation method is：By the first metal-oxide-semiconductor S1With the second metal-oxide-semiconductor S2Drive signal
Complementation is set to, the first metal-oxide-semiconductor S is calculated by maximum power tracing algorithm1Dutycycle so that the 3rd metal-oxide-semiconductor S3With the 4th MOS
Pipe S4Drive signal is complementary and the 3rd metal-oxide-semiconductor S3Dutycycle and the first metal-oxide-semiconductor S1It is identical, keep the first metal-oxide-semiconductor S1With the 3rd
Metal-oxide-semiconductor S3Between phase shifting angle be 180 ° so that the 5th IGBT pipe S5With the 6th IGBT pipe S6Drive signal is complementary and dutycycle
0.5 is, the first metal-oxide-semiconductor S is kept1With the 5th IGBT pipe S5Rising edge between keep certain phase shifting angle φ, and phase shifting angle φ
Meet, wherein= ,=, δ is the first metal-oxide-semiconductor S1The high level midpoint of drive signal and the 5th MOS
Pipe S5Phase shifting angle between the high level midpoint of drive signal,For the first metal-oxide-semiconductor S1Dutycycle,For the 5th IGBT pipe S5
Dutycycle.
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| CN113273071B (en) * | 2019-02-22 | 2024-03-08 | 阿尔卑斯阿尔派株式会社 | DC voltage conversion circuit and switching power supply device |
| CN111464032A (en) * | 2020-05-25 | 2020-07-28 | 台达电子企业管理（上海）有限公司 | Chopper circuit and control method thereof |
| CN112600238B (en) * | 2020-07-30 | 2023-06-20 | 青岛大学 | Differential power optimized DMPPT photovoltaic cell module based on multi-port Buck-Boost direct-current converter |
| CN112531851A (en) * | 2020-12-14 | 2021-03-19 | 杜国峰 | Direct current power generation management system and portable power generation device |
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