CN109327158A - A kind of current mode parallel network reverse device of integrated power decoupling and stepping functions - Google Patents

A kind of current mode parallel network reverse device of integrated power decoupling and stepping functions Download PDF

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Publication number
CN109327158A
CN109327158A CN201811158861.7A CN201811158861A CN109327158A CN 109327158 A CN109327158 A CN 109327158A CN 201811158861 A CN201811158861 A CN 201811158861A CN 109327158 A CN109327158 A CN 109327158A
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China
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power
inductance
switch pipe
parallel network
current mode
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CN201811158861.7A
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CN109327158B (en
Inventor
刘永露
夏子晴
粟梅
孙尧
许国
但汉兵
熊文静
王辉
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Central South University
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Central South University
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M7/53Conversion of dc power input into ac power output without possibility of reversal 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
    • H02M7/537Conversion of dc power input into ac power output without possibility of reversal 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, e.g. single switched pulse inverters
    • H02M7/5387Conversion of dc power input into ac power output without possibility of reversal 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, e.g. single switched pulse inverters in a bridge configuration
    • H02M7/53871Conversion of dc power input into ac power output without possibility of reversal 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, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
    • H02M7/53873Conversion of dc power input into ac power output without possibility of reversal 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, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current with digital control
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/14Arrangements for reducing ripples from dc input or output

Abstract

The present invention provides a kind of current mode parallel network reverse devices of integrated power decoupling and stepping functions.Including input unit, inversion buck the regulation unit, output unit being sequentially connected;The inversion buck regulation unit includes power buffer circuit and full-bridge inverter.The present invention is by the secondary pulsating power in system by the decoupling capacitance C in power buffer circuitsIt absorbs, so that DC side input current average value is constant, avoids the use of large capacity input filter, improve system power-density and reliability;It is limited in addition, input DC power voltage is no longer less than output exchange grid-connected voltage amplitude half by its value, has widened the application range of converter.

Description

A kind of current mode parallel network reverse device of integrated power decoupling and stepping functions
Technical field
The invention belongs to inverter power supply technical fields, are related to circuit modulation technique field, more particularly, to a kind of inverse Become device.
Background technique
Single-phase grid-connected inverter is widely used in photovoltaic system and fuel cell system, to realize that energy is grid-connected.But When carrying out power conversion, and the secondary pulsating power of net side leads to low frequency input current ripple, not only influence maximum power point with Track can also reduce the components service life such as capacitor, battery.Therefore, it handles the imbalance of input/output terminal instantaneous power well, eliminates two Influence of the secondary pulsating power to system has realistic meaning.
Passive decoupling technology buffers secondary pulsating power by increasing the capacity of passive device, this method have it is simple, It is easy the advantages of implementing, but considerably increases the cost of system, reduce the power density of system, and be unfavorable for device Modularized design in addition, the use of the electrolytic capacitor of large capacity also will limit system lifetim, reduce system reliability.It is another The feasible method of kind is active decoupling technology, and secondary pulsating power is transferred to additional small capacitances to keep away using switching device by it Exempt from the adverse effect of secondary pulsating power, the disadvantages of passive decoupling technology power density is low, capacitance is big is not present, thus obtains Extensive concern and research.
On the other hand, the current source inverter of existing literature report, to guarantee to operate normally, the width of DC input voitage Value needs to be less than the half of grid-connected voltage amplitude, however which limit the application ranges of inverter.
Summary of the invention
(1) technical problems to be solved
For above-mentioned various prior art defects, the present invention provides a kind of a kind of inverter for overcoming the above problem, should Inverter has secondary pulsating power decoupling ability and wide input voltage range, and it can be to avoid large capacity input filter Use, improve system power-density and reliability.
(2) technical solution
In order to achieve the above object, the main technical schemes that the present invention uses include:
The present invention provides a kind of current mode parallel network reverse devices of integrated power decoupling and stepping functions, including successively Input unit, inversion buck regulation unit and the output unit of connection;It is characterized by: the inversion buck regulates and controls unit Including power buffer circuit and full-bridge inverter;The power buffer circuit includes decoupling capacitance Cs, power triple-pole switch pipe S0、 Diode D2With inductance L;In the inversion buck regulation unit, power triple-pole switch pipe S0Collector and the decoupling it is electric Hold CsOne end is connected with the positive direct-current bus of input unit, power triple-pole switch pipe S0Emitter and diode D2Cathode and One end of inductance L is connected;Two input terminals of the other end of inductance L and the negative DC bus of input unit and the full-bridge inverter Wherein one end be connected, the decoupling capacitance CsThe other end and diode D2Anode and the full-bridge inverter two input terminals Other end be connected.
Preferably, the full-bridge inverter includes power triple-pole switch pipe S1、S2、S3And S4, power triple-pole switch pipe S1With S3Collector and the decoupling capacitance CsOne end be connected, power triple-pole switch pipe S2And S4Base stage and one end phase of inductance L Even, power triple-pole switch pipe S1Base stage and power triple-pole switch pipe S2Collector be connected with the output unit middle capacitor Cg, the power triple-pole switch pipe S4Collector, power triple-pole switch pipe S3Base stage and the output unit the other end It is connected.
Preferably, the power triple-pole switch pipe S0-S4Concrete type be IGBT, bipolar junction transistor or metal-oxide-semiconductor.
Preferably, the decoupling capacitance CsFor thin-film capacitor.
Preferably, the DC power supply in the input unit is photovoltaic panel or fuel cell.
Preferably, the direct current power source voltage V in the input unitinNo longer by grid-connected voltage amplitude VmConstraint, can More than or less than grid-connected voltage amplitude VmHalf.
Preferably, the full-bridge inverter works in unity power factor mode;In grid-connected voltage ugPositive half period, S1 And S4It turns off always, S2And S3It is simultaneously turned on or is turned off by PWM wave modulation;In grid-connected voltage ugNegative half-cycle, S2And S3Always Shutdown, S1And S4It is simultaneously turned on or is turned off by PWM wave modulation.
Preferably, the output unit includes inductance Lg, capacitor CgWith exchange out-put supply ug;The inductance LgOne end With the power triple-pole switch pipe S1Base stage and S2Collector be connected, the inductance LgThe other end exchange output with described Power supply ugOne end be connected, the exchange out-put supply ugThe other end and the power triple-pole switch pipe S4Collector and S3 Emitter be connected;The capacitor CgIt is connected to the inductance L respectivelygOut-put supply u is exchanged with describedgBoth ends.
Preferably, the current mode parallel network reverse device further includes over-sampling modulate circuit, controller and MOSFET driving electricity Road;The over-sampling modulate circuit for acquiring input voltage value, decoupling capacitance C in the power buffer circuitsVoltage value, electricity Feel in the voltage value and the output unit of the current value of L, the voltage value of direct-current single-phase power supply, exchange out-put supply and flows through Lg's Current value, and carry out analog-to-digital conversion process.
Preferably, the controller is used to obtain each power triple-pole switch based on treated the voltage value and current value The action signal of pipe, and the signal is conveyed to the MOSFET driving circuit;The MOSFET driving circuit is for controlling The conducting and shutdown of each switching device.
(3) beneficial effect
As shown from the above technical solution, the present invention has following the utility model has the advantages that the present invention is by the secondary pulsation function in system Rate is by the decoupling capacitance C in power buffer circuitsIt absorbs, so that output filter capacity greatly reduces;Inverter of the invention The power density of system and reliability are improved;The operation constraint of decoupling capacitance voltage is few, so that voltage stress is low, reduces system Cost.Inverter of the invention has both secondary pulsating power decoupling ability and provides the ability of wide output voltage range.
Detailed description of the invention
The features and advantages of the present invention will be more clearly understood by referring to the accompanying drawings, and attached drawing is schematically without that should manage Solution is carries out any restrictions to the present invention, in the accompanying drawings:
Fig. 1 is the electrical block diagram of current mode parallel network reverse device;
Fig. 2 is four kinds of operating status schematic diagram (u of current mode parallel network reverse deviceg>0);
Fig. 3 is the control system block diagram schematic diagram of current mode parallel network reverse device;
Fig. 4 (a)-Fig. 4 (e) is to be according to current mode parallel network reverse device output voltage of the present inventionWhen ug、 idc、iac、uc、u1Experimental waveform figure.
Description of symbols: 1, direct-current input power supplying;2, input unit;3, power buffer cell;4, full-bridge inverter;5, Output unit;6, over-sampling modulate circuit;7, controller;8, MOSFET driving circuit.
Specific embodiment
In order to make the object, technical scheme and advantages of the embodiment of the invention clearer, below in conjunction with the embodiment of the present invention In attached drawing, technical scheme in the embodiment of the invention is clearly and completely described, it is clear that
Described embodiments are some of the embodiments of the present invention, instead of all the embodiments.Based in the present invention Embodiment, every other embodiment obtained by those of ordinary skill in the art without making creative efforts, all Belong to the scope of protection of the invention.
Embodiment 1:
Inverter provided by the present invention include be sequentially connected include the input unit 2 with direct-current input power supplying 1, Power buffer cell 3, full-bridge inverter 4, output unit 5;The power buffer circuit includes decoupling capacitance CsAnd the decoupling Capacitor CsDiode D in parallel2, switch S0With inductance L.
Wherein, inverter is the device for converting direct current to exchange, and load of the invention can be AC load, can be with For rectifier etc..
Wherein, the output end of direct-current input power supplying is connected to the diode D of input unit1, the output end company of input unit It is connected to the input terminal of power buffer cell, the output end of power buffer cell is connected to the input terminal of full-bridge inverter, inverter Output end be connected to the input terminal of output unit, input terminal end is exchange out-put supply.
Wherein, inversion buck regulation unit plays the adjusting function of buck and unity power factor correction.Electric energy When flowing through the inverter, the decoupling capacitance in power buffer circuit absorbs the secondary pulsating power in system, so that direct current Side input current average value is constant, avoids the use of large capacity input filter.
In a preferred embodiment, power buffer circuit further include: switching device S0With inductance L and lifting buckling Parallel operation;Preferably, buck-boost converter includes switching device S0, inductance L, diode D2;The S0Base stage and the decoupling it is electric Hold CsOne end is connected, the S0Collector and the diode D2Cathode be connected with one end of the inductance L, the electricity The other end of sense L is connected with inversion unit.The decoupling capacitance CsThe other end and the diode D2Anode and inversion unit phase Even.
That is, power buffer circuit includes 1 switching device (switching device S0), 1 decoupling capacitance Cs, 1 inductance L and 1 Diode D2.Switching device S0Collector and diode D2Cathode be connected with one end of inductance L;The other end of inductance L with Inversion unit is connected;Decoupling capacitance CsThe other end and diode D2Anode be connected with inversion unit.
As switching device S0When opening, decoupling capacitance CsElectric discharge, inductance L charging, as switching device S0When shutdown, decoupling electricity Hold CsCharging, inductance L electric discharge.
In an embodiment of the present invention, the secondary pulsating power in system is buffered by decoupling capacitance Cs, decoupling capacitance CsIt can Think thin-film capacitor.
Power buffer circuit and full-bridge inverter realize the work of unity power factor correction and inversion jointly in the present invention With.
In a preferred embodiment, inversion buck regulation unit includes the power buffering electricity containing buck-boost converter Road 3 and full-bridge inverter 4.
Input unit 2 is connected with power buffer circuit 3, and power buffer circuit 3 is connected with full-bridge inverter 4, full-bridge inverting Device 4 is connected with output unit 5.
That is, the output end of input unit 2 is connected to power buffer circuit 3,3 output end of power buffer circuit is connected to full-bridge Inverter 4, the output end of full-bridge inverter 4 are connected to output unit 5.
In a preferred embodiment, the full-bridge inverter includes full bridge power triple-pole switch pipe S1、S2、S3、S4;It opens Close device S1Collector and switching device S3Collector and decoupling capacitance CsOne end be connected, switch member S2Collector It is connected with one end of inductance L with the collector of switching device S5, switching device S1Base stage and S2Collector and output is single Member is connected, S4Collector, S3Base stage be connected with the other end of output unit.
That is, switching device S1Collector and switching device S3Collector and decoupling capacitance CsOne end be connected, switch Device S2Collector and the collector of switching device S5 be connected with one end of inductance L, switching device S1Base stage and S2Collection Electrode is connected with output unit, S4Collector, S3Base stage be connected with the other end of output unit.
Inductance LgIt is connected with full-bridge inverter, third inductance LgOne end and the switching device S1Base stage and S2Collection Electrode is connected, inductance LgThe other end with exchange out-put supply ugOne end be connected, exchange out-put supply ugThe other end and S4's Collector and S3Base stage be connected.
In a preferred embodiment, output unit includes third inductance Lg, third capacitor CgWith exchange out-put supply ug
Inductance LgOne end and S1Base stage and S2Collector be connected, inductance LgThe other end with exchange out-put supply ug's One end is connected, and exchanges the other end and S of out-put supply ug4Collector and S3Base stage be connected, capacitor CgIt is connected to the electricity respectively Feel LgOut-put supply u is exchanged with describedgBoth ends.
That is, inductance LgOne end and S1Base stage and S2Collector be connected, inductance LgThe other end with exchange out-put supply ugOne end be connected, exchange out-put supply ugThe other end and S4Collector and S3Emitter be connected, capacitor CgIt is connected to respectively The inductance LgOut-put supply u is exchanged with describedgThe both ends of the series circuit of composition.
Embodiment 2:
As shown in Figure 1, one kind disclosed in the present embodiment has secondary pulsating power decoupling ability and wide output voltage range Inverter, input unit 2 including direct-current input power supplying 1, inversion buck regulate and control unit 3 and 4, output unit 5.
Wherein, the output end of input power 1 is connected to the anode of the diode D1 of input unit 2, the output of input unit 2 End both ends are connected to two input terminals of power buffer circuit 3, and 3 output end of power buffer circuit is connected to full-bridge inverter 4, full-bridge The output end of inverter 4 is connected to output unit 5.
Input unit includes DC power supply and 1 diode D1;DC power supply is connected with the input unit, input unit It is connected with power buffer circuit, power buffer circuit is connected with full-bridge inverter, and full-bridge inverter is connected with output unit.
Power buffer circuit 3 includes 1 switching device (switching device S0), 1 decoupling capacitance Cs, 1 inductance L and 1 two Pole pipe D2;S0Collector and with diode D2Cathode be connected with one end of inductance L;The other end and inversion unit of inductance L It is connected;Decoupling capacitance CsThe other end and diode D2Anode be connected with inversion unit.Decoupling in the power buffer circuit of voltage school Capacitor CsUse thin-film capacitor.
Full-bridge inverter 4 includes 4 switching device (S1、S2、S3、S4, concrete type be IGBT, bipolar junction transistor or Person's metal-oxide-semiconductor);S1Collector and S2Collector and decoupling capacitance CsOne end be connected, S2Base stage and S4Base stage it is equal It is connected with one end of inductance L, S1Base stage and S2Collector be connected with output unit, S4Collector, S3Base stage and The other end of output unit is connected.
Output unit 5 includes 1 inductance Lg, 1 capacitor CgOut-put supply u is exchanged with 1g;Inductance LgOne end and S1's Base stage and S2Collector be connected, inductance LgThe other end with exchange out-put supply ugOne end be connected, exchange out-put supply ug's The other end and S4Collector and S3Base stage be connected, capacitor CgIt is connected to the inductance L respectivelygOut-put supply u is exchanged with describedg's Both ends.
As shown in Fig. 2, it has following four kinds of operating statuses:
S in operating status 10Conducting, S1And S2Shutdown (is denoted as S0=1, S1=0, S2=0);
S in operating status 22Conducting, S0And S1Shutdown (is denoted as S2=1, S0=0, S1=0);(ugIt is S when < 01Conducting, S0With S2Shutdown)
S in operating status 30、S1And S2Shutdown (is denoted as S0=0, S1=0, S2=0);
S in operating status 40And S2Conducting, S1Shutdown (is denoted as S0=1, S1=0, S2=1).(ugIt is S when < 00And S1Conducting, S2Shutdown).
Work as S0It turns off (operating status 3 and 4), electric current flows through decoupling capacitance.When operating status 3, most of energy is from power grid Inject decoupling capacitance Cs;When operating status 4, decoupling capacitance releases energy to inverter and the first inductance L.Work as S0Open (operation State 1 and 2) decoupling capacitance CsIt is bypassed.And for full-bridge inverter and output unit, work as S2(operating status 2 and 4) is opened, Electric current flows through inverter, works as S2It turns off (operating status 1 and 3), electric current flows through the first inductance L.
By control strategy it is found that S2And S3Complementation, and S1Independently of each other.
The working condition of inverter according to the present invention is more it is found that when input power is greater than output power in device Energy out is absorbed by decoupling capacitance;When input power is less than output power, decoupling capacitance releases the energy of absorption, keeps Output power it is constant.
Fig. 3 is control system block diagram of the present invention, control circuit include corresponding over-sampling modulate circuit 6, controller 7 and MOSFET driving circuit 8;The left-hand component sample circuit of over-sampling modulate circuit 6 is responsible for input voltage, inductance L electric current and decoupling The right-hand component sample circuit of the sampling and conditioning of the voltage of capacitor, sample circuit is responsible for inductance Lg, capacitor CgWith output voltage Sampling and conditioning.Controller 7 is responsible for the important process such as calculating and modulate, and each switching signal is passed to driving circuit 8.It uses Preceding method is controlled, and in control process, automatically realizes the decoupling of ripple power.In addition it is possible to use other Controller, such as the control of fuzzy controller, PID controller, adaptive voltage, can obtain better control effect.
Using the inverter of the present embodiment, DC input power 200W, voltage 50V, output voltage isInductance L, Lg are respectively 3mH, 2mH, decoupling capacitance CsCapacity be 50 μ F, capacitor CgFor 10 μ F.Sampling frequency Rate and switching frequency are 50kHz.
Fig. 4 is according to above-mentioned configuration, and output voltage isWhen idc、uc、iac、ugAnd u1Respective experimental waveform Figure;By the way that decoupling capacitance C is arrangedsFor thin-film capacitor, the present invention improves the reliability and power density of system.
Embodiment 3:
As Figure 2-3, in over-sampling modulate circuit, including acquisition input voltage value Vin, decouple in power buffer circuit The voltage value u of capacitorc, inductance L current value idc, exchange out-put supply voltage value ugWith L is flowed through in output unitgElectric current Value iac;Controller is used to obtain the action signal of each switching device based on treated the voltage value and current value, and by institute It states signal and is conveyed to the MOSFET driving circuit;MOSFET driving circuit is used to control conducting and the pass of each switching device It is disconnected.In over-sampling modulate circuit, the voltage value collected and current value are usually subjected to analog-to-digital conversion process, and transmitted To controller.
In a preferred embodiment, each MOSFET power triple-pole switch pipe is calculated with based on the voltage value and current value Action signal specifically: in grid-connected voltage ugPositive half period, S1And S4It turns off always, S2And S3It is modulated while being led by PWM wave Logical or shutdown;In grid-connected voltage ugNegative half-cycle, S2And S3It turns off always, S1And S4It is simultaneously turned on or is turned off by PWM wave modulation.
In a preferred embodiment, d1、d2、d3、d4Respectively represent the duty ratio of four kinds of states in Fig. 2:
Work as induction charging, capacitor discharges, at this time d1~d4Value are as follows:
d2=0;
Work as inductive discharge, when capacitor charging, d at this time1~d4Value are as follows:
d3=0;
Wherein, idcFor the current value of the first inductance L, iacFor third inductance L3Current value, idFor decoupling capacitance CsFill Electric current, IinFor input terminal electric current.
Pass through above-mentioned dutyfactor value d1、d2、d3And d4Obtain S in a switch periods0、S1And S2Turn on and off when Between, i.e., with one with switching frequency with frequency and amplitude be 0~1 sawtooth wave make comparisons with duty ratio, when the value of sawtooth wave is greater than When duty ratio, exports and export for low level when the value of sawtooth wave is less than duty ratio as high level.
Wherein, work as induction charging, when capacitor discharges, d1Control target be input current, d3+d4Control target be it is defeated Electric current out;
Wherein, work as inductive discharge, when capacitor charging, d1+d2Control target be input current, d4Control target be it is defeated Electric current out.
In a preferred embodiment of the invention, the current value reference value I of desired controlac_rCalculating be based on output electricity The voltage value of pressure value, the value of output power and decoupling capacitance.
Specifically can include:
Single-phase output voltage detecting value usIt is calculated using phaselocked loop and obtains phase information ω t, pair obtained based on the ω t Cosine value cos (ω t) is answered, wherein ω is single phase poaer supply voltage angular frequency, and ω t is single-phase input supply voltage phase;
The decoupling capacitance voltage filter out using notch filter obtain filtering out after second order, higher-order frequency signal it is dry The signal U for the decoupling capacitance voltage disturbedc_dc, by decoupling capacitance averaged reference voltage and Uc_dcIt makes the difference, obtains decoupling capacitance voltage Error amount;
Decoupling capacitance voltage error value is passed through into a pi controller, is exported as current amplitude with reference to I_ref1.And By itself and output electric current stable state feed-forward component I_ref2It makes the difference to obtain the reference value I of the output electric current of desired control_ref;It will output electricity The reference value I of stream_refCurrent value reference value I with the product with cos (ω t) as desired controlac_r=I_refCos (ω t), And proportion of utilization-resonant controller realizes the steady track of output reference current.
In a preferred embodiment of the invention, the voltage reference value V of desired controlL_rCalculating be based on output direct current The sampled value of voltage reference value, the sampled value for exporting DC voltage and inductive current.
Specifically can include: the instantaneous flow i of electric current will be exportedacAbsolute value and input current rated value IinAfter addition, make For the current reference value I of inductance Ldc_ref, and proportion of utilization-integral controller realizes the tracking of reference value.
Finally, the foregoing is merely illustrative of the preferred embodiments of the present invention, it is not intended to limit the invention, it is all in the present invention Spirit and principle within, any modification, equivalent replacement, improvement and so on, should be included in protection scope of the present invention it It is interior.

Claims (10)

1. a kind of current mode parallel network reverse device of integrated power decoupling and stepping functions, including sequentially connected input are single Member, inversion buck regulation unit and output unit;It is characterized by: the inversion buck regulation unit includes power buffering Circuit and full-bridge inverter;The power buffer circuit includes decoupling capacitance Cs, power triple-pole switch pipe S0, diode D2And electricity Feel L;In the inversion buck regulation unit, power triple-pole switch pipe S0Collector and the decoupling capacitance CsOne end and defeated The positive direct-current bus for entering unit is connected, power triple-pole switch pipe S0Emitter and diode D2Cathode and inductance L one end phase Even;Wherein one end phase of the other end of inductance L and the negative DC bus of input unit and two input terminals of the full-bridge inverter Even, the decoupling capacitance CsThe other end and diode D2Anode and the full-bridge inverter two input terminals other end phase Even.
2. current mode parallel network reverse device according to claim 1, which is characterized in that the full-bridge inverter includes power Triple-pole switch pipe S1、S2、S3And S4, power triple-pole switch pipe S1And S3Collector and the decoupling capacitance CsOne end be connected, Power triple-pole switch pipe S2And S4Base stage be connected with one end of inductance L, power triple-pole switch pipe S1Base stage opened with three pole of power Close pipe S2Collector be connected with the output unit middle capacitor Cg, the power triple-pole switch pipe S4Collector, power three Pole switching tube S3Base stage be connected with the other end of the output unit.
3. current mode parallel network reverse device according to claim 2, which is characterized in that the power triple-pole switch pipe S0-S4 Concrete type be IGBT, bipolar junction transistor or metal-oxide-semiconductor.
4. current mode parallel network reverse device according to claim 1, which is characterized in that the decoupling capacitance CsFor thin-film capacitor.
5. current mode parallel network reverse device according to claim 1, which is characterized in that the DC power supply in the input unit For photovoltaic panel or fuel cell.
6. current mode parallel network reverse device according to claim 1, which is characterized in that the direct current in the input unit Source voltage VinNo longer by grid-connected voltage amplitude VmConstraint, grid-connected voltage amplitude V can be more than or less thanmHalf.
7. current mode parallel network reverse device according to claim 3, which is characterized in that the full-bridge inverter works in list Position power factor mode;In grid-connected voltage ugPositive half period, S1And S4It turns off always, S2And S3It is simultaneously turned on by PWM wave modulation Or shutdown;In grid-connected voltage ugNegative half-cycle, S2And S3It turns off always, S1And S4It is simultaneously turned on or is turned off by PWM wave modulation.
8. current mode parallel network reverse device according to claim 3, which is characterized in that the output unit includes inductance Lg、 Capacitor CgWith exchange out-put supply ug;The inductance LgOne end and the power triple-pole switch pipe S1Base stage and S2Collector It is connected, the inductance LgThe other end exchange out-put supply u with describedgOne end be connected, the exchange out-put supply ugIt is another End and the power triple-pole switch pipe S4Collector and S3Emitter be connected;The capacitor CgIt is connected to the inductance L respectivelyg Out-put supply u is exchanged with describedgBoth ends.
9. current mode parallel network reverse device according to claim 1, which is characterized in that the current mode parallel network reverse device It further include over-sampling modulate circuit, controller and MOSFET driving circuit;The over-sampling modulate circuit for acquire input voltage value, Decoupling capacitance C in the power buffer circuitsVoltage value, the current value of inductance L, the voltage value of direct-current single-phase power supply, exchange L is flowed through in the voltage value of out-put supply and the output unitgCurrent value, and carry out analog-to-digital conversion process.
10. current mode parallel network reverse device according to claim 9, which is characterized in that the controller is used for based on place The voltage value and current value after reason obtain the action signal of each power triple-pole switch pipe, and the signal are conveyed to described MOSFET driving circuit;The MOSFET driving circuit is used to control the conducting and shutdown of each switching device.
CN201811158861.7A 2018-09-30 2018-09-30 Current type grid-connected inverter integrating power decoupling and buck-boost functions Active CN109327158B (en)

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CN201811158861.7A CN109327158B (en) 2018-09-30 2018-09-30 Current type grid-connected inverter integrating power decoupling and buck-boost functions

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Application Number Priority Date Filing Date Title
CN201811158861.7A CN109327158B (en) 2018-09-30 2018-09-30 Current type grid-connected inverter integrating power decoupling and buck-boost functions

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CN109327158A true CN109327158A (en) 2019-02-12
CN109327158B CN109327158B (en) 2020-08-14

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CN110350816A (en) * 2019-07-16 2019-10-18 福州大学 A kind of single-stage and-phase current source inverter of energy storage inductor parallel connection Active Snubber Circuit
CN110712538A (en) * 2019-09-20 2020-01-21 中国第一汽车股份有限公司 Electric automobile alternating current discharging module and control method
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Publication number Priority date Publication date Assignee Title
CN110266016A (en) * 2019-05-21 2019-09-20 浙江大学 A kind of control strategy of the increase power factor applied to power decoupled PFC topology
CN110266016B (en) * 2019-05-21 2020-08-21 浙江大学 Control strategy applied to power decoupling PFC topology and used for improving power factor
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CN110350816B (en) * 2019-07-16 2020-10-09 福州大学 Single-stage single-phase current type inverter with energy storage inductor connected with active buffer circuit in parallel
CN110712538A (en) * 2019-09-20 2020-01-21 中国第一汽车股份有限公司 Electric automobile alternating current discharging module and control method
CN110784115A (en) * 2019-11-14 2020-02-11 中南大学 High-reliability high-power-density single-phase current type converter

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