CN102361408A - Non-isolated photovoltaic grid-connected inverter and switching control time sequence thereof - Google Patents
Non-isolated photovoltaic grid-connected inverter and switching control time sequence thereof Download PDFInfo
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- CN102361408A CN102361408A CN2011103213913A CN201110321391A CN102361408A CN 102361408 A CN102361408 A CN 102361408A CN 2011103213913 A CN2011103213913 A CN 2011103213913A CN 201110321391 A CN201110321391 A CN 201110321391A CN 102361408 A CN102361408 A CN 102361408A
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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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion 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
- H02M7/53—Conversion 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
- H02M7/537—Conversion 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
- H02M7/5387—Conversion 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
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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
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/123—Suppression of common mode voltage or current
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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 provides a high-efficiency and low-current-leakage non-isolated photovoltaic grid-connected inverter and a switching control time sequence thereof. The high-efficiency and low-current-leakage non-isolated photovoltaic grid-connected inverter comprises a voltage sharing capacitor branch circuit (1), a clamping branch circuit (2), a full bridge basic unit (3) and a follow current branch circuit (4). On the basis of a full bridge circuit, two controllable switching tubes and a voltage sharing capacitor are added to form the bidirectional clamping branch circuit, and two controllable switching tubes are added to form the zero level follow current branch circuit; furthermore, the switching time sequence is matched, so the potential of a follow current loop in a follow current stage is in a half of battery voltage; therefore, leakage current of the non-isolated photovoltaic grid-connected inverter is eliminated; moreover, output current in a power transmission stage can only flow through the two switching tubes, so the conduction loss is the lowest.
Description
Technical field
The present invention relates to a kind of non-isolated grid-connected inverter and switch control time sequence thereof, belong to combining inverter topologies field.
Background technology
Advantage such as the non-isolation type photovoltaic combining inverter has the efficient height, volume is little, in light weight and cost is low.But because the cell panel existence of parasitic capacitance over the ground, time variant voltage acts on the parasitic capacitance when making the switch motion of combining inverter switching device to produce high frequency, and the leakage current that brings out thus possibly exceed allowed band.The generation of high-frequency leakage current can bring the increase of conduction and radiated interference, network access current harmonics and loss, even jeopardizes equipment and personal security.
The differential mode characteristic good of the full-bridge grid-connected inverter of Unipolar SPWM, the high and filter inductance current pulsation amount extensive concern that receives such as little like the input direct voltage utilance.But produced the common-mode voltage (its amplitude is an input direct voltage) of switching frequency pulsation simultaneously; Make and to add transformer isolation (low frequency or high frequency) in grid-connected application scenario; But the common-mode voltage of dither constitutes a threat to the dielectric strength of transformer, has further increased cost of manufacture.In order to remove the isolating transformer in the full-bridge grid-connected inverter of Unipolar SPWM, patent EP1369985A2 proposes the new continuous current circuit of (AC side) two-way gate-controlled switch set constructor of adding between the brachium pontis mid point of full-bridge circuit; Patent US7411802B2 only introduces a HF switch at the battery side anode, can realize that equally afterflow stage solar cell end and electrical network break away from.But according to full-bridge circuit high frequency common mode equivalent model; In order to eliminate the high frequency common mode voltage that the Unipolar SPWM modulation produces; Must make the continuous current circuit current potential in afterflow stage be clamped at the half the of solar cell input voltage; Common-mode voltage is eliminated fully, and be not that cell panel and electrical network are broken away from.Patent CN101814856A (has accomplished substantive examination and has repaiied back; Issued for approval) on the basis of patent US7411802B2, adds the clamp branch road and can the continuous current circuit current potential in afterflow stage be clamped at the half the of solar cell input voltage; Significantly reduce the switching frequency leakage current, single because the single-way switch of introducing has caused the leakage current positive-negative half-cycle not to journey, increased the burden of equalizing capacitance balancing circuitry; In addition; US7411802B2 is the same with patent, at power delivery stage electric current three power tubes of need flowing through, has increased conduction loss.
Summary of the invention
The objective of the invention is to overcome the defective of above-mentioned prior art, a kind of non-isolated grid-connected inverter and switch control time sequence thereof are provided.
For realizing above-mentioned purpose, non-isolated grid-connected inverter according to the invention can adopt following three kinds of technical schemes:
Technical scheme one:
A kind of non-isolated grid-connected inverter comprises dividing potential drop capacitive branch, clamp branch road, full-bridge elementary cell and afterflow branch road; The dividing potential drop capacitive branch is by the first dividing potential drop capacitor C
Dc1, the second dividing potential drop capacitor C
Dc2Form; The clamp branch road comprises the 7th power switch tube S
7, the 8th power switch tube S
8Form; The full-bridge elementary cell is by first power switch tube S
1, second power switch tube S
2, the 3rd power switch tube S
3, the 4th power switch tube S
4Form; Clamp props up route the 5th power switch tube S
5, the 6th power switch tube S
6Form.
The first dividing potential drop capacitor C wherein
Dc1Anode connect solar cell positive output end, first power switch tube S respectively
1With the 3rd power switch tube S
3Collector electrode; The first dividing potential drop capacitor C
Dc1Negative terminal connect the second dividing potential drop capacitor C respectively
Dc2Anode, the 8th power switch tube S
8Collector electrode; The second dividing potential drop capacitor C
Dc2Negative terminal connect solar cell negative output terminal, second power switch tube S respectively
2Emitter, the 4th power switch tube S
4Emitter.
First power switch tube S
1Emitter connect second power switch tube S respectively
2Collector electrode, the 5th power switch tube S
5Collector electrode and network access filter L
1An end.
The 3rd power switch tube S
3Emitter connect the 4th power switch tube S respectively
4Collector electrode, the 6th power switch tube S
6Collector electrode and network access filter L
2An end.
The 5th power switch tube S
5Emitter connect the 6th power switch tube S respectively
6Emitter, the 7th power switch tube S
7Collector electrode.
The 7th power switch tube S
7Emitter connect the 8th power switch tube S
8Emitter.
Technical scheme two:
A kind of non-isolated grid-connected inverter comprises dividing potential drop capacitive branch, clamp branch road, full-bridge elementary cell and afterflow branch road; The dividing potential drop capacitive branch is by the first dividing potential drop capacitor C
Dc1, the second dividing potential drop capacitor C
Dc2Form; The clamp branch road comprises the 7th power switch tube S
7, the 8th power switch tube S
8Form; The full-bridge elementary cell is by first power switch tube S
1, second power switch tube S
2, the 3rd power switch tube S
3, the 4th power switch tube S
4Form; Clamp props up route the 5th power switch tube S
5, the 6th power switch tube S
6Form.
The first dividing potential drop capacitor C wherein
Dc1Anode connect solar cell positive output end, first power switch tube S respectively
1With the 3rd power switch tube S
3Collector electrode; The first dividing potential drop capacitor C
Dc1Negative terminal connect the second dividing potential drop capacitor C respectively
Dc2Anode, the 8th power switch tube S
8Collector electrode; The second dividing potential drop capacitor C
Dc2Negative terminal connect solar cell negative output terminal, second power switch tube S respectively
2Emitter, the 4th power switch tube S
4Emitter.
First power switch tube S
1Emitter connect second power switch tube S respectively
2Collector electrode, the 5th power switch tube S
5Collector electrode, the 7th power switch tube S
7Collector electrode and network access filter L
1An end.
The 3rd power switch tube S
3Emitter connect the 4th power switch tube S respectively
4Collector electrode, the 6th power switch tube S
6Collector electrode and network access filter L
2An end.
The 5th power switch tube S
5Emitter connect the 6th power switch tube S respectively
6Emitter
The 7th power switch tube S
7Emitter connect the 8th power switch tube S
8Emitter.
Technical scheme three:
A kind of non-isolated grid-connected inverter comprises dividing potential drop capacitive branch, clamp branch road, full-bridge elementary cell and afterflow branch road; The dividing potential drop capacitive branch is by the first dividing potential drop capacitor C
Dc1, the second dividing potential drop capacitor C
Dc2Form; The clamp branch road comprises the 7th power switch tube S
7, the 8th power switch tube S
8Form; The full-bridge elementary cell is by first power switch tube S
1, second power switch tube S
2, the 3rd power switch tube S
3, the 4th power switch tube S
4Form; Clamp props up route the 5th power switch tube S
5, the 6th power switch tube S
6Form.
The first dividing potential drop capacitor C wherein
Dc1Anode connect solar cell positive output end, first power switch tube S respectively
1With the 3rd power switch tube S
3Collector electrode; The first dividing potential drop capacitor C
Dc1Negative terminal connect the second dividing potential drop capacitor C respectively
Dc2Anode, the 8th power switch tube S
8Collector electrode; The second dividing potential drop capacitor C
Dc2Negative terminal connect solar cell negative output terminal, second power switch tube S respectively
2Emitter, the 4th power switch tube S
4Emitter.
First power switch tube S
1Emitter connect second power switch tube S respectively
2Collector electrode, the 5th power switch tube S
5Collector electrode and network access filter L
1An end.
The 3rd power switch tube S
3Emitter connect the 4th power switch tube S respectively
4Collector electrode, the 6th power switch tube S
6Collector electrode, the 7th power switch tube S
7Collector electrode and network access filter L
2An end.
The 5th power switch tube S
5Emitter connect the 6th power switch tube S respectively
6Emitter.
The 7th power switch tube S
7Emitter connect the 8th power switch tube S
8Emitter.
Switch control time sequence according to the invention can realize that detailed process is following based in above-mentioned three kinds of non-isolated grid-connected inverters any one:
With first power switch tube S
1With the 4th power switch tube S
4By the action of Unipolar SPWM mode high frequency, negative half period turn-offs at the positive half cycle of network access electric current;
With second power switch tube S
2With the 3rd power switch tube S
3By the action of Unipolar SPWM mode high frequency, positive half cycle turn-offs at network access electric current negative half period;
With the 5th power switch tube S
5Open-minded at network access electric current negative half period, positive half cycle turn-offs;
With the 6th power switch tube S
6Open-minded at the positive half cycle of network access electric current, negative half period turn-offs;
With the 7th power switch tube S
7With the 8th power switch tube S
8The drive signal and first power switch tube S at the positive half cycle of network access electric current
1Drive signal complementary, and add Dead Time; The drive signal and second power switch tube S at network access electric current negative half period
2Drive signal complementary, and add Dead Time;
The present invention adds two controlled tr tubes at the brachium pontis outlet side on the basis of full-bridge circuit provide continuous current circuit and add two controlled tr tubes and dividing potential drop electric capacity formation two-way clamp branch road at DC side; Can realize afterflow during the stage continuous current circuit current potential be in 1/2nd cell voltage and suppress leakage current; And guaranteed power delivery stage output current two switching tubes of only flowing through, effectively reduce conduction loss.In addition, the adding of clamp branch road makes the voltage stress of the HF switch that the alternating current-direct current side is introduced be merely the half the of input cell voltage.
Description of drawings
Fig. 1 (a) is the circuit diagram of main circuit technical scheme one of the present invention.
In the present technique scheme, be a termination of clamp branch road and the mid point of afterflow branch road.
The circuit diagram of Fig. 1 (b) main circuit technical scheme two of the present invention.
In the present technique scheme, a termination of clamp branch road and afterflow branch road side.
Fig. 1 (c) is the circuit diagram of main circuit technical scheme three of the present invention.
In the present technique scheme, a termination of clamp branch road and another side of afterflow branch road.
Fig. 2 is a driving signal of power switching tube sketch map of the present invention.
Fig. 3 (a)-(d) is clamp operation mode figure of the present invention, wherein
Fig. 3 (a) is that continuous current circuit voltage reduces the operation mode figure of the positive half cycle of network access electric current;
Fig. 3 (b) is that continuous current circuit voltage raises the operation mode figure of the positive half cycle of network access electric current;
Fig. 3 (c) is that continuous current circuit voltage reduces the operation mode figure of network access electric current negative half period;
Fig. 3 (d) is that continuous current circuit voltage raises the operation mode figure of network access electric current negative half period.
Fig. 4 is inverter brachium pontis output voltage (differential mode voltage) and network access voltage, the current waveform figure of the embodiment of the invention.
Fig. 5 (a) is the common-mode voltage waveform and the spectrogram of the embodiment of the invention.
Fig. 5 (b) is the leakage current waveform and the spectrogram of the embodiment of the invention.
The main symbol of above-mentioned accompanying drawing and label title: C
Dc1, C
Dc2---dividing potential drop electric capacity; S
1～S
8---power switch pipe; Grid, u
g---line voltage; U
Pv---the solar panel output voltage; L
1, L
2---the network access filter inductance; C
1---the network access filter capacitor; i
g---the network access electric current; u
1N---1 pair of battery negative terminal voltage of inverter bridge mid point; u
2N---2 pairs of battery negative terminal voltages of inverter bridge mid point; i
Leakage---leakage current.
Embodiment
Below in conjunction with accompanying drawing technical scheme of the present invention is elaborated:
Fig. 1 (a)-(c) has described three kinds of constituted modes of main circuit of the present invention, by the first dividing potential drop capacitor C
Dc1With the second dividing potential drop capacitor C
Dc2Be composed in series elementary cell 1; By first power switch tube S
1, second power switch tube S
2, the 3rd power switch tube S
3With the 4th power switch tube S
4Form elementary cell 3; By the 5th power switch tube S
5, the 6th power switch tube S
6Form elementary cell 4; By the 7th power switch tube S
7, the 8th power switch tube S
8Form elementary cell 2; Elementary cell 2 constitutes three kinds of circuit structures with three kinds of on-link mode (OLM)s of elementary cell 3.
Fig. 2 is the drive signal sequential chart of main circuit power switch pipe of the present invention, first power switch tube S
1With the 4th power switch tube S
4, close by the action of Unipolar SPWM mode high frequency at the positive half cycle of network access electric current at network access electric current negative half period; Second power switch tube S
2With the 3rd power switch tube S
3, close by the action of Unipolar SPWM mode high frequency at network access electric current negative half period at the positive half cycle of network access electric current; The 5th power switch tube S
5Drive signal straight-through at network access electric current negative half period, close at the positive half cycle of network access electric current; The 6th power switch tube S
6Drive signal straight-through at the positive half cycle of network access electric current, close at network access electric current negative half period; The 7th power switch tube S
7With the 8th power switch tube S
8Drive signal in the positive half cycle of network access electric current and first power switch tube S
1Drive signal complementary, and add Dead Time, in the network access electric current negative half period and second power switch tube S
2Drive signal complementary, and add Dead Time; In order to guarantee the complete clamp of continuous current circuit, zero passage stage the 5th power switch tube S
5, the 6th power switch tube S
6, the 7th power switch tube S
7With the 8th power switch tube S
8Need conducting.
Equivalent electric circuit when Fig. 3 (a)-(d) works for the converter clamp.Network access sense of current no matter is as long as the continuous current circuit current potential reduces the 8th power switch tube S
8With the 7th power switch tube S
7Anti-and diode or parasitic diode conducting, continuous current circuit is clamped at
As long as the continuous current circuit current potential raises, the 7th power switch tube S
7With the 8th power switch tube S
8Anti-and diode or parasitic diode conducting conducting, equally continuous current circuit is clamped at
Level.
An instantiation of the present invention is following: cell plate voltage U
Pv=400V, line voltage U
Grid=220VRMS, mains frequency f
Grid=50Hz, rated power P
N=2kW; Dc-link capacitance C
Dc1=C
Dc2=470 μ F; Filter inductance L
1=L
2=2mH; Filter capacitor C
1=6 μ F; Cell panel is parasitic capacitance C over the ground
Pv1=C
Pv2=0.15 μ F; Switch lock f=20kHZ.
Accompanying drawing 4～5 is the concrete experimental waveform figure of this instance, and as can be seen from Figure 4, the brachium pontis output voltage of combining inverter is the Unipolar SPWM waveform, has realized good differential mode characteristic, can reduce the filter inductance size and improve conversion efficiency.
The common-mode voltage that from accompanying drawing 5 (a), can find out the output of inverter brachium pontis is except having in switching dead time the pulse voltage; The effective clamp of Duan Jun quilt is to steady state value At All Other Times; Significantly reduce the pulsation energy of common-mode voltage, helped reducing the amplitude of common mode leakage current; Accompanying drawing 5 (b) has quantized to prove that from experimental viewpoint the amplitude of electric leakage is big or small, is lower than the limit value (less than 20mA) of standard DIN VDE 0126-1-1-2006.
Claims (4)
1. a non-isolated grid-connected inverter is characterized in that: comprise dividing potential drop capacitive branch (1), clamp branch road (2), full-bridge elementary cell (3) and afterflow branch road (4); Dividing potential drop capacitive branch (1) is by the first dividing potential drop electric capacity (C
Dc1), the second dividing potential drop electric capacity (C
Dc2) form; Clamp branch road (2) is by the 7th power switch pipe (S
7), the 8th power switch pipe (S
8) form; Full-bridge elementary cell (3) is by the first power switch pipe (S
1), the second power switch pipe (S
2), the 3rd power switch pipe (S
3), the 4th power switch pipe (S
4) form; Clamp branch road (4) is by the 5th power switch pipe (S
5), the 6th power switch pipe (S
6) form;
The above-mentioned first dividing potential drop electric capacity (C
Dc1) anode connect solar cell positive output end, the first power switch pipe (S respectively
1) and the 3rd power switch pipe (S
3) collector electrode; The first dividing potential drop electric capacity (C
Dc1) negative terminal connect the second dividing potential drop electric capacity (C respectively
Dc2) anode, the 8th power switch pipe (S
8) collector electrode; The second dividing potential drop electric capacity (C
Dc2) negative terminal connect solar cell negative output terminal, the second power switch pipe (S respectively
2) emitter, the 4th power switch pipe (S
4) emitter;
The above-mentioned first power switch pipe (S
1) emitter connect the second power switch pipe (S respectively
2) collector electrode, the 5th power switch pipe (S
5) collector electrode and network access filter (
L 1) an end;
Above-mentioned the 3rd power switch pipe (S
3) emitter connect the 4th power switch pipe (S respectively
4) collector electrode, the 6th power switch pipe (S
6) collector electrode and network access filter (
L 2) an end;
Above-mentioned the 5th power switch pipe (S
5) emitter connect the 6th power switch pipe (S respectively
6) emitter, the 7th power switch pipe (S
7) collector electrode;
Above-mentioned the 7th power switch pipe (S
7) emitter connect the 8th power switch pipe (S
8) emitter.
2. a non-isolated grid-connected inverter is characterized in that: comprise dividing potential drop capacitive branch (1), clamp branch road (2), full-bridge elementary cell (3) and afterflow branch road (4); Dividing potential drop capacitive branch (1) is by the first dividing potential drop electric capacity (C
Dc1), the second dividing potential drop electric capacity (C
Dc2) form; Clamp branch road (2) is by the 7th power switch pipe (S
7), the 8th power switch pipe (S
8) form; Full-bridge elementary cell (3) is by the first power switch pipe (S
1), the second power switch pipe (S
2), the 3rd power switch pipe (S
3), the 4th power switch pipe (S
4) form; Clamp branch road (4) is by the 5th power switch pipe (S
5), the 6th power switch pipe (S
6) form;
The above-mentioned first dividing potential drop electric capacity (C
Dc1) anode connect solar cell positive output end, the first power switch pipe (S respectively
1) and the 3rd power switch pipe (S
3) collector electrode; The first dividing potential drop electric capacity (C
Dc1) negative terminal connect the second dividing potential drop electric capacity (C respectively
Dc2) anode, the 8th power switch pipe (S
8) collector electrode; The second dividing potential drop electric capacity (C
Dc2) negative terminal connect solar cell negative output terminal, the second power switch pipe (S respectively
2) emitter, the 4th power switch pipe (S
4) emitter;
The above-mentioned first power switch pipe (S
1) emitter connect the second power switch pipe (S respectively
2) collector electrode, the 5th power switch pipe (S
5) collector electrode, the 7th power switch pipe (S
7) collector electrode and network access filter (
L 1) an end;
The 3rd power switch pipe (S
3) emitter connect the 4th power switch pipe (S respectively
4) collector electrode, the 6th power switch pipe (S
6) collector electrode and network access filter (
L 2) an end;
The 5th power switch pipe (S
5) emitter connect the 6th power switch pipe (S respectively
6) emitter
The 7th power switch pipe (S
7) emitter connect the 8th power switch pipe (S
8) emitter.
3. a non-isolated grid-connected inverter is characterized in that: comprise dividing potential drop capacitive branch (1), clamp branch road (2), full-bridge elementary cell (3) and afterflow branch road (4); Dividing potential drop capacitive branch (1) is by the first dividing potential drop electric capacity (C
Dc1), the second dividing potential drop electric capacity (C
Dc2) form; Clamp branch road (2) is by the 7th power switch pipe (S
7), the 8th power switch pipe (S
8) form; Full-bridge elementary cell (3) is by the first power switch pipe (S
1), the second power switch pipe (S
2), the 3rd power switch pipe (S
3), the 4th power switch pipe (S
4) form; Clamp branch road (4) is by the 5th power switch pipe (S
5), the 6th power switch pipe (S
6) form;
The first dividing potential drop electric capacity (C wherein
Dc1) anode connect solar cell positive output end, the first power switch pipe (S respectively
1) and the 3rd power switch pipe (S
3) collector electrode; The first dividing potential drop electric capacity (C
Dc1) negative terminal connect the second dividing potential drop electric capacity (C respectively
Dc2) anode, the 8th power switch pipe (S
8) collector electrode; The second dividing potential drop electric capacity (C
Dc2) negative terminal connect solar cell negative output terminal, the second power switch pipe (S respectively
2) emitter, the 4th power switch pipe (S
4) emitter;
The above-mentioned first power switch pipe (S
1) emitter connect the second power switch pipe (S respectively
2) collector electrode, the 5th power switch pipe (S
5) collector electrode and network access filter (
L 1) an end;
Above-mentioned the 3rd power switch pipe (S
3) emitter connect the 4th power switch pipe (S respectively
4) collector electrode, the 6th power switch pipe (S
6) collector electrode, the 7th power switch pipe (S
7) collector electrode and network access filter (
L 2) an end;
Above-mentioned the 5th power switch pipe (S
5) emitter connect the 6th power switch pipe (S respectively
6) emitter;
The 7th power switch pipe (S
7) emitter connect the 8th power switch pipe (S
8) emitter.
4. switch control time sequence based on claim 1 or 2 or 3 said non-isolated grid-connected inverters, it is characterized in that: detailed process is following:
With the first power switch pipe (S
1) and the 4th power switch pipe (S
4) move by Unipolar SPWM mode high frequency at the positive half cycle of network access electric current, negative half period turn-offs;
With the second power switch pipe (S
2) and the 3rd power switch pipe (S
3) move by Unipolar SPWM mode high frequency at network access electric current negative half period, positive half cycle turn-offs;
With the 5th power switch pipe (S
5) open-minded at network access electric current negative half period, positive half cycle turn-offs;
With the 6th power switch pipe (S
6) open-minded at the positive half cycle of network access electric current, negative half period turn-offs;
With the 7th power switch pipe (S
7) and the 8th power switch pipe (S
8) at the drive signal and the first power switch pipe (S of the positive half cycle of network access electric current
1) drive signal complementary, and add Dead Time; The drive signal and the second power switch pipe (S with network access electric current negative half period
2) drive signal complementary, and add Dead Time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103213913A CN102361408A (en) | 2011-10-20 | 2011-10-20 | Non-isolated photovoltaic grid-connected inverter and switching control time sequence thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2011103213913A CN102361408A (en) | 2011-10-20 | 2011-10-20 | Non-isolated photovoltaic grid-connected inverter and switching control time sequence thereof |
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| Publication Number | Publication Date |
|---|---|
| CN102361408A true CN102361408A (en) | 2012-02-22 |
Family
ID=45586670
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|---|---|---|---|
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Cited By (12)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969898A (en) * | 2012-11-29 | 2013-03-13 | 盐城工学院 | Low-voltage wide-input three-level full-bridge converter and control method thereof |
| CN103051233A (en) * | 2012-12-12 | 2013-04-17 | 东南大学 | Non-isolated single-phase photovoltaic grid-connected inverter and on-off control timing sequence thereof |
| CN103346687A (en) * | 2013-06-20 | 2013-10-09 | 东华大学 | Single-phase non-isolated photovoltaic grid-connected inverter topological structure and control method thereof |
| CN104242716B (en) * | 2014-08-07 | 2017-01-11 | 东南大学 | High-reliability non-switching-loss type non-isolated inverter and switching control time sequence thereof |
| CN108566110A (en) * | 2018-02-02 | 2018-09-21 | 山东理工大学 | A kind of active neutral point clamp photovoltaic inverter circuit of T shapes and its control method |
| WO2018171767A1 (en) * | 2017-03-24 | 2018-09-27 | 江苏固德威电源科技股份有限公司 | Five-level low-common-mode leakage current single-phase photovoltaic grid-connected inverter and photovoltaic grid-connected system |
| CN108695928A (en) * | 2018-05-28 | 2018-10-23 | 武汉天富海科技发展有限公司 | A kind of isolated photovoltaic charged apparatus and method |
| CN111293914A (en) * | 2019-12-13 | 2020-06-16 | 东南大学 | High-performance neutral point clamped three-level non-isolated inverter and switch control time sequence thereof |
| CN114499252A (en) * | 2021-12-27 | 2022-05-13 | 南京邮电大学 | Eleven-switch clamping type three-phase photovoltaic inverter topology |
| CN114884329A (en) * | 2021-11-26 | 2022-08-09 | 深圳市首航新能源股份有限公司 | Grid-connected inverter and voltage spike suppression method |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1369985A2 (en) * | 2002-05-15 | 2003-12-10 | Frauenhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Inverter for transforming a DC voltage into an AC current or an AC voltage |
| CN101980409A (en) * | 2010-11-25 | 2011-02-23 | 河北工业大学 | Grid-connected photovoltaic inverter |
| CN102163852A (en) * | 2011-03-15 | 2011-08-24 | 南京航空航天大学 | Neutral point clamped non-isolated photovoltaic grid-connected inverter |
| CN102185511A (en) * | 2011-05-09 | 2011-09-14 | 浙江金贝能源科技有限公司 | Noninsulated type converting circuit from direct-current voltage to alternating-current voltage |
-
2011
- 2011-10-20 CN CN2011103213913A patent/CN102361408A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1369985A2 (en) * | 2002-05-15 | 2003-12-10 | Frauenhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Inverter for transforming a DC voltage into an AC current or an AC voltage |
| CN101980409A (en) * | 2010-11-25 | 2011-02-23 | 河北工业大学 | Grid-connected photovoltaic inverter |
| CN102163852A (en) * | 2011-03-15 | 2011-08-24 | 南京航空航天大学 | Neutral point clamped non-isolated photovoltaic grid-connected inverter |
| CN102185511A (en) * | 2011-05-09 | 2011-09-14 | 浙江金贝能源科技有限公司 | Noninsulated type converting circuit from direct-current voltage to alternating-current voltage |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102969898A (en) * | 2012-11-29 | 2013-03-13 | 盐城工学院 | Low-voltage wide-input three-level full-bridge converter and control method thereof |
| CN103051233A (en) * | 2012-12-12 | 2013-04-17 | 东南大学 | Non-isolated single-phase photovoltaic grid-connected inverter and on-off control timing sequence thereof |
| CN103051233B (en) * | 2012-12-12 | 2015-02-18 | 东南大学 | Non-isolated single-phase photovoltaic grid-connected inverter and on-off control timing sequence thereof |
| CN103346687A (en) * | 2013-06-20 | 2013-10-09 | 东华大学 | Single-phase non-isolated photovoltaic grid-connected inverter topological structure and control method thereof |
| CN104242716B (en) * | 2014-08-07 | 2017-01-11 | 东南大学 | High-reliability non-switching-loss type non-isolated inverter and switching control time sequence thereof |
| WO2018171767A1 (en) * | 2017-03-24 | 2018-09-27 | 江苏固德威电源科技股份有限公司 | Five-level low-common-mode leakage current single-phase photovoltaic grid-connected inverter and photovoltaic grid-connected system |
| CN108566110A (en) * | 2018-02-02 | 2018-09-21 | 山东理工大学 | A kind of active neutral point clamp photovoltaic inverter circuit of T shapes and its control method |
| CN108695928A (en) * | 2018-05-28 | 2018-10-23 | 武汉天富海科技发展有限公司 | A kind of isolated photovoltaic charged apparatus and method |
| CN111293914A (en) * | 2019-12-13 | 2020-06-16 | 东南大学 | High-performance neutral point clamped three-level non-isolated inverter and switch control time sequence thereof |
| CN114884329A (en) * | 2021-11-26 | 2022-08-09 | 深圳市首航新能源股份有限公司 | Grid-connected inverter and voltage spike suppression method |
| CN114884329B (en) * | 2021-11-26 | 2023-02-28 | 深圳市首航新能源股份有限公司 | Grid-connected inverter and voltage spike suppression method |
| CN114499252A (en) * | 2021-12-27 | 2022-05-13 | 南京邮电大学 | Eleven-switch clamping type three-phase photovoltaic inverter topology |
| CN114499252B (en) * | 2021-12-27 | 2024-06-21 | 南京邮电大学 | Eleven-switch clamping type three-phase photovoltaic inverter topology |
| CN115296556A (en) * | 2022-07-15 | 2022-11-04 | 华为数字能源技术有限公司 | Inverter and control method thereof |
| CN115296556B (en) * | 2022-07-15 | 2024-07-05 | 华为数字能源技术有限公司 | Inverter and control method thereof |
| CN116094295A (en) * | 2022-12-23 | 2023-05-09 | 浙江艾罗网络能源技术股份有限公司 | Inverter topology and inverter |
| CN116094295B (en) * | 2022-12-23 | 2024-03-26 | 浙江艾罗网络能源技术股份有限公司 | Inverter topology and inverter |
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