CN205123579U - High -gain DC -DC photovoltaic booster converter based on coupling inductance - Google Patents
High -gain DC -DC photovoltaic booster converter based on coupling inductance Download PDFInfo
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- CN205123579U CN205123579U CN201520953889.5U CN201520953889U CN205123579U CN 205123579 U CN205123579 U CN 205123579U CN 201520953889 U CN201520953889 U CN 201520953889U CN 205123579 U CN205123579 U CN 205123579U
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- inductance
- anode
- negative terminal
- electric capacity
- capacitor
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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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Abstract
The utility model discloses a high -gain DC -DC photovoltaic booster converter based on coupling inductance, the output anode of photovoltaic cell board and inductance L1's end of the same name link to each other, and the output negative terminal of photovoltaic cell board links to each other with power electronic switch S's negative terminal, electric capacity C1 and cf's negative terminal respectively, the L2's of power electronic switch S's anode, inductance non - end of the same name, direct current electric capacity C1's anode and direct current electric capacity C2's negative terminal are connected respectively to inductance L1's non - end of the same name, inductance L2's end of the same name links to each other with inductance L3's non - end of the same name, direct current electric capacity C2's anode, direct current electric capacity C3's negative terminal respectively, inductance L3's end of the same name is connected with direct current electric capacity C3's anode, inductance lf's anode respectively, electric capacity cf's anode and dc bus anode are connected respectively to inductance lf's negative terminal, the negative terminal of dc bus is connected to electric capacity cf's negative terminal. The utility model discloses a coupling inductance realizes multistage purpose of stepping up, has advantages such as direct current voltage gain is high, control is simple, system electromagnetic compatibility is good, with low costs.
Description
Technical field
The utility model belongs to generation of electricity by new energy and intelligent distribution system field, particularly a kind of high-gain DC-DC photovoltaic booster converter based on coupling inductance.
Background technology
It is the generation of electricity by new energy technology of representative that global energy crisis and ecological deterioration greatly facilitate with solar energy power generating, and converters, as the important step of electric energy conversion in solar energy power generating, is one of photovoltaic generating system core technology.
Typical grid-connected photovoltaic system is connected with high voltage dc bus by respective booster converter by multiple photovoltaic battery module, then through combining inverter to mains supply.Wherein, photovoltaic battery module is composed in parallel by several little photovoltaic cell string usually.Be limited to influencing each other between the otherness of intensity of illumination and each battery, photovoltaic cell can not be connected too much, otherwise the performance of whole module can reduce greatly.The output voltage of photovoltaic battery module is relatively low (33 ~ 43V), and half-bridge/full-bridge grid-connected inverter required input voltage is usually at more than 380/760V, the input and output voltage of booster converter has differed decades of times, and traditional B oost converter is not competent.How to ensure under the reliable prerequisite of systematic economy, realizing the DC-DC conversion of high efficiency, high boosting, become the study hotspot of grid-connected photovoltaic system.
Utility model content
The purpose of this utility model is to overcome the deficiencies in the prior art, a kind of object adopting coupling inductance to realize multistage boosting is provided, be conducive to Modular Structure Design, have DC voltage gain high, control simple, system EMC is good, the high-gain DC-DC photovoltaic booster converter based on coupling inductance of low cost and other advantages.
The purpose of this utility model is achieved through the following technical solutions: a kind of high-gain DC-DC photovoltaic booster converter based on coupling inductance, comprises photovoltaic battery panel, multiple inductance L be of coupled connections by mutual flux
1, L
2, L
3, electronic power switch S, DC capacitor C
1, C
2, C
3, and by inductance L
fwith electric capacity C
fthe output filter formed;
The output plus terminal of photovoltaic battery panel and inductance L
1same Name of Ends be connected, the output negative terminal of photovoltaic battery panel respectively with negative terminal, the electric capacity C of electronic power switch S
1and C
fnegative terminal be connected;
Inductance L
1non-same polarity connect the anode of electronic power switch S, the L of inductance respectively
2non-same polarity, DC capacitor C
1anode and DC capacitor C
2negative terminal;
Inductance L
2same Name of Ends respectively with inductance L
3non-same polarity, DC capacitor C
2anode, DC capacitor C
3negative terminal be connected;
Inductance L
3same Name of Ends respectively with DC capacitor C
3anode, inductance L
fanode connect;
Inductance L
fnegative terminal connect electric capacity C respectively
fanode and DC bus anode;
Electric capacity C
fnegative terminal connect the negative terminal of DC bus.
Further, described inductance L
1non-same polarity series connection access sustained diode
1, sustained diode
1anode connect L respectively
1non-same polarity and the anode of electronic power switch S, sustained diode
1negative electrode connect the L of inductance respectively
2non-same polarity, DC capacitor C
1anode and DC capacitor C
2negative terminal.
Further, described inductance L
2same Name of Ends series connection access sustained diode
2, sustained diode
2anode and inductance L
2same Name of Ends be connected, sustained diode
2negative electrode connect L respectively
3non-same polarity, DC capacitor C
2anode, DC capacitor C
3negative terminal be connected.
Further, described inductance L
3same Name of Ends series connection access sustained diode
3, sustained diode
3anode and inductance L
3same Name of Ends be connected, sustained diode
3negative electrode connect DC capacitor C respectively
3anode and inductance L
fanode.
The beneficial effects of the utility model are:
1, inductance L
1, L
2, L
3magnetic coupling technology is adopted to realize energy transferring, achieve the object of multistage boosting, be easy to realize high frequency thus significantly reduce component size, being conducive to Modular Structure Design, have DC voltage gain high, control simple, system EMC is good, low cost and other advantages;
2, this topological structure can realize high-gain DC-DC copped wave boost function, may be used for the DC boosting of single photovoltaic battery panel, is convenient to single photovoltaic battery panel to adopt Miniature inverter directly to access electrical network; Also can be used for jumbo large-sized photovoltaic array accesses direct-current grid or middle pressure AC network application scenario by DC booster converter.
Accompanying drawing explanation
Fig. 1 is the circuit topology figure of high-gain DC-DC photovoltaic booster converter of the present utility model;
Fig. 2 utility model works pattern I schematic diagram;
Fig. 3 utility model works pattern II schematic diagram;
Fig. 4 utility model works pattern III schematic diagram;
The waveform schematic diagram of Fig. 5 utility model works pattern I, II, III.
Embodiment
The technical solution of the utility model is further illustrated below in conjunction with accompanying drawing.
As shown in Figure 1, a kind of high-gain DC-DC photovoltaic booster converter based on coupling inductance of the present utility model, comprises photovoltaic battery panel, multiple inductance L be of coupled connections by mutual flux
1, L
2, L
3, electronic power switch S, DC capacitor C
1, C
2, C
3, and by inductance L
fwith electric capacity C
fthe output filter formed;
The output plus terminal of photovoltaic battery panel and inductance L
1same Name of Ends be connected, the output negative terminal of photovoltaic battery panel respectively with negative terminal, the electric capacity C of electronic power switch S
1and C
fnegative terminal be connected;
Inductance L
1non-same polarity connect the anode of electronic power switch S, the L of inductance respectively
2non-same polarity, DC capacitor C
1anode and DC capacitor C
2negative terminal;
Inductance L
2same Name of Ends respectively with inductance L
3non-same polarity, DC capacitor C
2anode, DC capacitor C
3negative terminal be connected;
Inductance L
3same Name of Ends respectively with DC capacitor C
3anode, inductance L
fanode connect;
Inductance L
fnegative terminal connect electric capacity C respectively
fanode and DC bus anode;
Electric capacity C
fnegative terminal connect the negative terminal of DC bus.
Further, described inductance L
1non-same polarity series connection access sustained diode
1, sustained diode
1anode connect L respectively
1non-same polarity and the anode of electronic power switch S, sustained diode
1negative electrode connect the L of inductance respectively
2non-same polarity, DC capacitor C
1anode and DC capacitor C
2negative terminal.
Further, described inductance L
2same Name of Ends series connection access sustained diode
2, sustained diode
2anode and inductance L
2same Name of Ends be connected, sustained diode
2negative electrode connect L respectively
3non-same polarity, DC capacitor C
2anode, DC capacitor C
3negative terminal be connected.
Further, described inductance L
3same Name of Ends series connection access sustained diode
3, sustained diode
3anode and inductance L
3same Name of Ends be connected, sustained diode
3negative electrode connect DC capacitor C respectively
3anode and inductance L
fanode.
The inductance L of the high-gain DC-DC boost converter circuit based on coupling inductance of the present utility model
1and sustained diode
1be in discontinuous operating mode (DiscontinuousConductionMode, DCM), ignore inductance L
1, L
2, L
3equivalent resistance, and suppose electric capacity C
1, C
2and C
3enough large so that ignore capacitance voltage ripple.Fig. 2 to Fig. 5 is respectively three kinds of typical mode of operation based on the high-gain DC-DC boost converter circuit of coupling inductance and waveform schematic diagram thereof.
Below the utility model three kinds of typical mode of operation and waveform schematic diagram thereof are specifically described.
Mode of operation I: as shown in Figure 2, waveform schematic diagram is [t in Fig. 5 to this operating mode circuit schematic diagram
0, t
1] stage.Under this pattern, electronic power switch S closes, and the energy storage of photovoltaic battery panel is in inductance L
1in, inductance L
1electric current increase gradually, to t=t
1in the moment, inductive current reaches maximum I
l1pk; Electric capacity C
1, C
2, C
3electric discharge, by output filter L
f, C
fto DC bus powered.
Mode of operation II: as shown in Figure 3, waveform schematic diagram is [t in Fig. 5 to this operating mode circuit schematic diagram
1, t
2] stage.Under this pattern, electronic power switch S is in open-circuit condition, inductance L
1in energy storage by magnetic coupling interaction to inductance L
2and L
3charging, due to inductance L
1there is certain leakage inductance, therefore L
1energy storage also to electric capacity C
1charging, charging current is I
lkg; Inductance L
2pass through sustained diode
2to electric capacity C
2charging, inductance L
3pass through sustained diode
3to electric capacity C
3charging; Inductance L
1, L
2, L
3give electric capacity C respectively
1, C
2, C
3while charging, due to the energy storage effect of electric capacity, electric capacity C
1, C
2, C
3also be DC bus powered.
Working mould formula III: as shown in Figure 4, waveform schematic diagram is [t in Fig. 5 to this operating mode circuit schematic diagram
2, t
3] stage.Under this pattern, electronic power switch S is in open-circuit condition, inductance L
1, L
2, L
3energy storage all discharge complete, now sustained diode
1, D
2, D
3be all reverse bias, electric capacity C
1, C
2, C
3be DC bus powered simultaneously.In the various stages, inductance is very fast to the charging rate of electric capacity, therefore electric capacity C
1, C
2, C
3for DC bus provides galvanic current pressure.
Fig. 5 gives the waveform schematic diagram of above-mentioned three kinds of mode of operations.As t=[t
0, t
1] time, the control signal V of electronic power switch S
gfor high level, the voltage signal V of electronic power switch S
sfor low level, inductance L
1electric current I
l1rise to I gradually
l1pk, inductance L
2electric current be zero; As t=[t
1, t
2] time, the control signal V of electronic power switch S
gfor low level, the voltage signal V of electronic power switch S
sfor V
c1, inductance L
1electric current I
l1reduce to zero, inductance L
2electric current from maximum I
l2pkbe reduced to zero gradually; As t=[t
2, t
3] time, the control signal V of electronic power switch S
gfor low level, the voltage signal V of electronic power switch S
sfor photovoltaic battery panel input voltage V
i, inductance L
1, L
2electric current I
l1, I
l2all reduce to zero.
Those of ordinary skill in the art will appreciate that, embodiment described here is to help reader understanding's principle of the present utility model, should be understood to that protection range of the present utility model is not limited to so special statement and embodiment.Those of ordinary skill in the art can make various other various concrete distortion and combination of not departing from the utility model essence according to these technology enlightenment disclosed in the utility model, and these distortion and combination are still in protection range of the present utility model.
Claims (4)
1. based on a high-gain DC-DC photovoltaic booster converter for coupling inductance, it is characterized in that, comprise photovoltaic battery panel, multiple inductance L be of coupled connections by mutual flux
1, L
2, L
3, electronic power switch S, DC capacitor C
1, C
2, C
3, and by inductance L
fwith electric capacity C
fthe output filter formed;
The output plus terminal of photovoltaic battery panel and inductance L
1same Name of Ends be connected, the output negative terminal of photovoltaic battery panel respectively with negative terminal, the electric capacity C of electronic power switch S
1and C
fnegative terminal be connected;
Inductance L
1non-same polarity connect the anode of electronic power switch S, the L of inductance respectively
2non-same polarity, DC capacitor C
1anode and DC capacitor C
2negative terminal;
Inductance L
2same Name of Ends respectively with inductance L
3non-same polarity, DC capacitor C
2anode, DC capacitor C
3negative terminal be connected;
Inductance L
3same Name of Ends respectively with DC capacitor C
3anode, inductance L
fanode connect;
Inductance L
fnegative terminal connect electric capacity C respectively
fanode and DC bus anode;
Electric capacity C
fnegative terminal connect the negative terminal of DC bus.
2. the high-gain DC-DC photovoltaic booster converter based on coupling inductance according to claim 1, is characterized in that, described inductance L
1non-same polarity series connection access sustained diode
1, sustained diode
1anode connect L respectively
1non-same polarity and the anode of electronic power switch S, sustained diode
1negative electrode connect the L of inductance respectively
2non-same polarity, DC capacitor C
1anode and DC capacitor C
2negative terminal.
3. the high-gain DC-DC photovoltaic booster converter based on coupling inductance according to claim 1, is characterized in that, described inductance L
2same Name of Ends series connection access sustained diode
2, sustained diode
2anode and inductance L
2same Name of Ends be connected, sustained diode
2negative electrode connect L respectively
3non-same polarity, DC capacitor C
2anode, DC capacitor C
3negative terminal be connected.
4. the high-gain DC-DC photovoltaic booster converter based on coupling inductance according to claim 1, is characterized in that, described inductance L
3same Name of Ends series connection access sustained diode
3, sustained diode
3anode and inductance L
3same Name of Ends be connected, sustained diode
3negative electrode connect DC capacitor C respectively
3anode and inductance L
fanode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520953889.5U CN205123579U (en) | 2015-11-26 | 2015-11-26 | High -gain DC -DC photovoltaic booster converter based on coupling inductance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520953889.5U CN205123579U (en) | 2015-11-26 | 2015-11-26 | High -gain DC -DC photovoltaic booster converter based on coupling inductance |
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| Publication Number | Publication Date |
|---|---|
| CN205123579U true CN205123579U (en) | 2016-03-30 |
Family
ID=55579150
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520953889.5U Expired - Fee Related CN205123579U (en) | 2015-11-26 | 2015-11-26 | High -gain DC -DC photovoltaic booster converter based on coupling inductance |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN205123579U (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105827115A (en) * | 2016-04-25 | 2016-08-03 | 国网北京市电力公司 | Direct current boost circuit, boost method and transformer |
| CN105958816A (en) * | 2016-05-30 | 2016-09-21 | 西安交通大学 | Multi-unit diode capacitor network and coupling inductor high-gain DC converter |
| CN106602867A (en) * | 2017-03-08 | 2017-04-26 | 广东工业大学 | High-gain switch capacitive power converter |
| CN107733221A (en) * | 2017-10-30 | 2018-02-23 | 西安交通大学 | A kind of multiple-unit coupling inductance switched capacitor network high-gain DC converter |
| CN109768725A (en) * | 2019-03-06 | 2019-05-17 | 武汉大学 | A kind of single-phase non-isolated photovoltaic grid-connected inverter topological structure |
-
2015
- 2015-11-26 CN CN201520953889.5U patent/CN205123579U/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105827115A (en) * | 2016-04-25 | 2016-08-03 | 国网北京市电力公司 | Direct current boost circuit, boost method and transformer |
| CN105827115B (en) * | 2016-04-25 | 2019-02-26 | 国网北京市电力公司 | DC voltage booster circuit, step-up method and transformer |
| CN105958816A (en) * | 2016-05-30 | 2016-09-21 | 西安交通大学 | Multi-unit diode capacitor network and coupling inductor high-gain DC converter |
| CN106602867A (en) * | 2017-03-08 | 2017-04-26 | 广东工业大学 | High-gain switch capacitive power converter |
| CN107733221A (en) * | 2017-10-30 | 2018-02-23 | 西安交通大学 | A kind of multiple-unit coupling inductance switched capacitor network high-gain DC converter |
| CN109768725A (en) * | 2019-03-06 | 2019-05-17 | 武汉大学 | A kind of single-phase non-isolated photovoltaic grid-connected inverter topological structure |
| CN109768725B (en) * | 2019-03-06 | 2020-08-07 | 武汉大学 | Single-phase non-isolated photovoltaic grid-connected inverter topological structure |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20160330 Termination date: 20181126 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |