CN108155785A - A kind of high booster converter of double dissymmetrical structures suitable for photovoltaic generating system - Google Patents
A kind of high booster converter of double dissymmetrical structures suitable for photovoltaic generating system Download PDFInfo
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- CN108155785A CN108155785A CN201810006913.2A CN201810006913A CN108155785A CN 108155785 A CN108155785 A CN 108155785A CN 201810006913 A CN201810006913 A CN 201810006913A CN 108155785 A CN108155785 A CN 108155785A
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- capacitance
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Classifications
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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
- H02M3/06—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider
- H02M3/07—Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using resistors or capacitors, e.g. potential divider using capacitors charged and discharged alternately by semiconductor devices with control electrode, e.g. charge pumps
-
- 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
Abstract
The invention discloses a kind of high booster converters of double dissymmetrical structures suitable for photovoltaic generating system, employ transformerless circuit structure, compared with traditional booster circuit, on the basis of boost capability is significantly improved, there is no the losses of transformer, significantly improve the working efficiency of circuit.The present invention has merged double asymmetric boosting units on the basis of cascade boost converter, and compared with the boosting unit of traditional symmetrical structure, with the increase of duty ratio, which has superior boost voltage performance.In the present invention, for converter when duty is higher, the working efficiency of boost capability and circuit has more superior advantage, compared with traditional booster converter, is more suitable for applying in middle large-power occasions.
Description
Technical field
The present invention relates to booster converter, more particularly to a kind of double dissymmetrical structures suitable for photovoltaic generating system
High booster converter.
Background technology
With increasingly exhausted and environment for human survival the worsening of traditional fossil energy, the regenerative resource of clean type
Development arrived extremely urgent stage, countries in the world are all in the application for being dedicated to researching and developing new energy, wherein too
It is positive to have been obtained for relatively broad application with wind energy.But for these systems, how to be incorporated into the power networks, meet in power grid
High voltage needs to be still sixty-four dollar question.At present, a large amount of boost converter, which is developed, meets these applications, not
In same converter, traditional BOOST converter theoretically can improve voltage gain by improving duty ratio.It is but practical
In, due to the limitation of parasitic parameter, very high voltage gain can not be realized.According to the topological structure of cascade connection type, device
The problem of inefficient caused by number of packages amount increase, can highlight again.
Invention content
Goal of the invention：The object of the present invention is to provide one kind efficiency and the ratio of gains can be significantly improved in middle large-power occasions
A kind of double dissymmetrical structures suitable for photovoltaic generating system high booster converter.
Technical solution：To reach this purpose, the present invention uses following technical scheme：
The high booster converter of double dissymmetrical structures of the present invention suitable for photovoltaic generating system, including input electricity
Source Vin, input power VinAnode connect inductance L respectively1One end and capacitance C2One end, inductance L1The other end connect respectively
Connect sustained diode2Anode, sustained diode4Anode and capacitance C3One end, capacitance C2The other end connect respectively it is continuous
Flow diode D4Cathode and sustained diode3Anode, sustained diode3Cathode connect capacitance C respectively3The other end
And sustained diode1Anode, sustained diode1Cathode connect capacitance C respectively1One end, capacitance C4One end and inductance
L2One end, inductance L2The other end connect sustained diode respectively6Anode, sustained diode2Cathode and switching tube S
Drain electrode, sustained diode6Cathode connect capacitance C respectively4The other end and output rectifier diode DoAnode, output it is whole
Flow diode DoCathode connect output capacitance C respectivelyoOne end and load resistance R one end, output capacitance CoThe other end,
The other end of load resistance R, the source electrode of switching tube S and capacitance C1The other end connect input power V respectivelyinCathode.
Further, capacitance C is further included5, capacitance C5One end connection inductance L2The other end, capacitance C5The other end connection
Export rectifier diode DoAnode.Capacitance C5Storage capacitors C1Voltage is added in output electricity by the energy of offer according to bootstrapping principle
In pressure, it is improved the voltage gain of circuit.
Further, sustained diode is further included5, sustained diode5Anode connection capacitance C4The other end, two pole of afterflow
The cathode D of pipe5Connect capacitance C5The other end.Sustained diode5For capacitance C5It stores energy and circuit is provided, with fly-wheel diode
D6, capacitance C4With capacitance C5The boosting unit of dissymmetrical structure is formed, improves the boost capability of circuit.
Advantageous effect：The invention discloses a kind of high boosting inverters of double dissymmetrical structures suitable for photovoltaic generating system
Device compared with prior art, has following advantageous effect：
1) present invention employs transformerless circuit structures, compared with traditional booster circuit, are significantly improving
On the basis of boost capability, there is no the losses of transformer, significantly improve the working efficiency of circuit；
2) present invention has merged double asymmetric boosting units on the basis of cascade boost converter, with traditional pair
The boosting unit of structure is claimed to compare, with the increase of duty ratio, which has superior boost voltage performance；
3) in the present invention, when duty is higher, the working efficiency of boost capability and circuit has more superior converter
Advantage compared with traditional booster converter, is more suitable for applying in middle large-power occasions.
Description of the drawings
Fig. 1 is the circuit diagram of booster converter in the first specific embodiment of the invention；
Fig. 2 is the circuit diagram of booster converter in second of specific embodiment of the invention；
Fig. 3 is the equivalent circuit diagram of booster converter in second of specific embodiment of the invention；
Fig. 4 is the modal graph of booster converter in second of specific embodiment of the invention；
Fig. 5 is the isoboles of the first switch mode of booster converter in second of specific embodiment of the invention；
Fig. 6 is the isoboles of second of switch mode of booster converter in second of specific embodiment of the invention；
Fig. 7 is the switching tube S both end voltages of booster converter, output voltage V in second of specific embodiment of the invention0
With output diode DoThe oscillogram of both end voltage；
Fig. 8 is the switching tube S both end voltages of booster converter, inductance L in second of specific embodiment of the invention1Both ends
Voltage and inductance L1Electric current oscillogram；
Fig. 9 is the switching tube S both end voltages of booster converter, inductance L in second of specific embodiment of the invention2Both ends
Voltage and inductance L2Electric current oscillogram；
Figure 10 is the switching tube S both end voltages of booster converter, two pole of afterflow in second of specific embodiment of the invention
Pipe D3Both end voltage and sustained diode4The oscillogram of both end voltage.
Specific embodiment
Technical scheme of the present invention is further introduced with attached drawing With reference to embodiment.
The first specific embodiment discloses a kind of high boosting of double dissymmetrical structures suitable for photovoltaic generating system
Converter, as shown in Figure 1, including input power Vin, input power VinAnode connect inductance L respectively1One end and capacitance C2
One end, inductance L1The other end connect sustained diode respectively2Anode, sustained diode4Anode and capacitance C3One
End, capacitance C2The other end connect sustained diode respectively4Cathode and sustained diode3Anode, sustained diode3's
Cathode connects capacitance C respectively3The other end and sustained diode1Anode, sustained diode1Cathode connect capacitance respectively
C1One end, capacitance C4One end and inductance L2One end, inductance L2The other end connect sustained diode respectively6Anode, continuous
Flow diode D2Cathode and switching tube S drain electrode, sustained diode6Cathode connect capacitance C respectively4The other end and output
Rectifier diode DoAnode, output rectifier diode DoCathode connect output capacitance C respectivelyoOne end and load resistance R
One end, output capacitance CoThe other end, the other end of load resistance R, the source electrode of switching tube S and capacitance C1The other end connect respectively
Meet input power VinCathode.
Second of specific embodiment increases capacitance C on the basis of the first specific embodiment5With two pole of afterflow
Pipe D5, as shown in Fig. 2, capacitance C5One end connection inductance L2The other end, capacitance C5The other end connection output rectifier diode
DoAnode；Sustained diode5Anode connection capacitance C4The other end, the cathode D of fly-wheel diode5Connect capacitance C5It is another
End.
Wherein, switching tube S is MOSFET or IGBT.
The equivalent circuit diagram of booster converter in second of specific embodiment of the invention, as shown in Figure 3.Input power Vin
Electric current be iin, input power VinVoltage be Vin, inductance L1Electric current isInductance L1The voltage of both sides isInductance L2's
Electric current isInductance L2The voltage of both sides isExport rectifier diode DoElectric current beExport rectifier diode DoBoth ends
Voltage beThe electric current for flowing through switching tube S is iS, the voltage at switching tube S both ends is VS, diode D1Electric current beTwo
Pole pipe D1The voltage at both ends isDiode D2Electric current beDiode D2The voltage at both ends isDiode D3Electric current
ForDiode D3The voltage at both ends isDiode D4Electric current beDiode D4The voltage at both ends isDiode
D5Electric current beDiode D5The voltage at both ends isDiode D6Electric current beDiode D6The voltage at both ends isCapacitance C1Electric current beCapacitance C1The voltage at both ends isCapacitance C2Electric current beCapacitance C2The voltage at both ends isCapacitance C3Electric current beCapacitance C3The voltage at both ends isCapacitance C4Electric current beCapacitance C4The voltage at both ends isCapacitance C5Electric current beCapacitance C5The voltage at both ends isOutput capacitance CoElectric current beOutput capacitance CoBoth ends
Voltage beThe electric current of load resistance R is io。
Fig. 4 is the modal graph of booster converter.The course of work of booster converter is divided into 2 switch mode, and respectively the
For a kind of switch mode to second of switch mode, resistance R is load, is described in detail below：
The first switch mode, [t in corresponding diagram 40,t1]：Shown in equivalent circuit Fig. 5, in t0Moment opens switching tube S,
Meanwhile sustained diode2, sustained diode3And sustained diode5Open-minded, the circulating pathway of electric current is as shown in figure 5, power supply
Pass through capacitance C2And sustained diode3Simultaneously to inductance L1With capacitance C3Charging, inductance L1Storage energy, the voltage of both sides start
It establishes, capacitance C1Pass through capacitance C4And sustained diode5Simultaneously to inductance L2With capacitance C5Charging, inductance L2Store energy, output
Capacitance CoGive load R power supplies.
Second of switch the mode, [t in corresponding diagram 41,t2]：Shown in equivalent circuit Fig. 6, switching tube S is in t2When turn off, together
When, sustained diode1, sustained diode4, sustained diode6With output rectifier diode DoIt is open-minded, sustained diode2, it is continuous
Flow diode D3And sustained diode5Shutdown, the circulating pathway of electric current is as shown in fig. 6, power supply, inductance L1, inductance L2, capacitance C3
With capacitance C5It releases energy simultaneously and gives load R, and to capacitance C1, capacitance C2, capacitance C4With output capacitance CoCharging, capacitance C1、
Capacitance C2, capacitance C4With output capacitance CoStore energy.
Gain expressions can be obtained from the above analysis is：
Wherein D is the duty ratio of switching tube S.
When converter is according to the first switch mode to second of switch Modality work, switching tube S both end voltages in circuit,
Inductance L1Both end voltage flows through inductance L1Electric current, inductance L2Both end voltage flows through inductance L2Electric current, output rectifier diode DoTwo
Terminal voltage, sustained diode4Both end voltage, sustained diode3The waveform of both end voltage is described in detail below：
In the figure 7, input voltage Vin=40V, output voltage VoThe drain-source both end voltage difference V of=380V, switching tube SDS's
Ordinate be 100 volts/cell, output voltage VoOrdinate is 100 volts/cell, exports rectifier diode DoBoth end voltageOrdinate is 50 volts/cell.
In fig. 8, input voltage Vin=40V, output voltage VoThe drain-source both end voltage difference V of=380V, switching tube SDS's
Ordinate be 100 volts/cell, inductance L1VoltageOrdinate be 20 volts/cell, inductance L1Electric currentOrdinate is 5
Peace/cell.
In fig.9, input voltage Vin=40V, output voltage VoThe drain-source both end voltage difference V of=380V, switching tube SDS's
Ordinate be 100 volts/cell, inductance L2VoltageOrdinate be 100 volts/cell, inductance L2Electric currentOrdinate is
2.5 peaces/cell.
In Fig. 10, input voltage Vin=40V, output voltage VoThe drain-source both end voltage difference V of=380V, switching tube SDS's
Ordinate be 100 volts/cell, sustained diode3Both end voltageOrdinate be 25 volts/cell, sustained diode4Two
Terminal voltageOrdinate is 25 volts/cell.
Claims (3)
1. a kind of high booster converter of double dissymmetrical structures suitable for photovoltaic generating system, it is characterised in that：Including input
Power supply Vin, input power VinAnode connect inductance L respectively1One end and capacitance C2One end, inductance L1The other end difference
Connect sustained diode2Anode, sustained diode4Anode and capacitance C3One end, capacitance C2The other end connect respectively
Sustained diode4Cathode and sustained diode3Anode, sustained diode3Cathode connect capacitance C respectively3It is another
End and sustained diode1Anode, sustained diode1Cathode connect capacitance C respectively1One end, capacitance C4One end and electricity
Feel L2One end, inductance L2The other end connect sustained diode respectively6Anode, sustained diode2Cathode and switching tube
The drain electrode of S, sustained diode6Cathode connect capacitance C respectively4The other end and output rectifier diode DoAnode, output
Rectifier diode DoCathode connect output capacitance C respectivelyoOne end and load resistance R one end, output capacitance CoIt is another
End, the other end of load resistance R, the source electrode of switching tube S and capacitance C1The other end connect input power V respectivelyinCathode.
2. the high booster converter of double dissymmetrical structures according to claim 1 suitable for photovoltaic generating system, special
Sign is：Further include capacitance C5, capacitance C5One end connection inductance L2The other end, capacitance C5The other end connection output rectification
Diode DoAnode.
3. the high booster converter of double dissymmetrical structures according to claim 2 suitable for photovoltaic generating system, special
Sign is：Further include sustained diode5, sustained diode5Anode connection capacitance C4The other end, the cathode of fly-wheel diode
D5Connect capacitance C5The other end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810006913.2A CN108155785A (en) | 2018-01-04 | 2018-01-04 | A kind of high booster converter of double dissymmetrical structures suitable for photovoltaic generating system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810006913.2A CN108155785A (en) | 2018-01-04 | 2018-01-04 | A kind of high booster converter of double dissymmetrical structures suitable for photovoltaic generating system |
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| Publication Number | Publication Date |
|---|---|
| CN108155785A true CN108155785A (en) | 2018-06-12 |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105978322A (en) * | 2016-06-29 | 2016-09-28 | 华南理工大学 | Switch capacitor type high-gain quasi Z source DC-DC converter |
| CN106712503A (en) * | 2017-02-13 | 2017-05-24 | 华南理工大学 | Quasi-switch boost DC-DC converter employing switching inductor and switching capacitor |
| CN107346939A (en) * | 2017-05-04 | 2017-11-14 | 北京信息科技大学 | A kind of new quasi- Z sources DC/DC converters |
-
2018
- 2018-01-04 CN CN201810006913.2A patent/CN108155785A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105978322A (en) * | 2016-06-29 | 2016-09-28 | 华南理工大学 | Switch capacitor type high-gain quasi Z source DC-DC converter |
| CN106712503A (en) * | 2017-02-13 | 2017-05-24 | 华南理工大学 | Quasi-switch boost DC-DC converter employing switching inductor and switching capacitor |
| CN107346939A (en) * | 2017-05-04 | 2017-11-14 | 北京信息科技大学 | A kind of new quasi- Z sources DC/DC converters |
Non-Patent Citations (3)
| Title |
|---|
| D SIVARAJ等: "High gain quadratic boost switched capacitor converter for photovoltaic applications", 《IEEE INTERNATIONAL CONFERENCE ON POWER, CONTROL, SIGNALS AND INSTRUMENTATION ENGINEERING》 * |
| MANXIN CHEN等: "Hybrid switched-capacitor quadratic boost converters with very high DC gain and low voltage stress on their semiconductor devices, 20160918, IEEE Energy Conversion Congress and Exposition", 《IEEE ENERGY CONVERSION CONGRESS AND EXPOSITION》 * |
| 王蕊: "改进型二次型DC/DC变换器的研究", 《中国优秀硕士学位论文全文数据库》 * |
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Application publication date: 20180612 |
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