CN103606956A - Power decoupling circuit for photovoltaic grid-connected inverter - Google Patents
Power decoupling circuit for photovoltaic grid-connected inverter Download PDFInfo
- Publication number
- CN103606956A CN103606956A CN201310631131.5A CN201310631131A CN103606956A CN 103606956 A CN103606956 A CN 103606956A CN 201310631131 A CN201310631131 A CN 201310631131A CN 103606956 A CN103606956 A CN 103606956A
- Authority
- CN
- China
- Prior art keywords
- decoupling
- switching tube
- capacitor
- series connection
- capacitance device
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
- 239000003990 capacitor Substances 0.000 claims abstract description 67
- 238000001914 filtration Methods 0.000 claims description 19
- 230000007547 defect Effects 0.000 abstract description 3
- 238000000034 method Methods 0.000 description 12
- 238000007600 charging Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 4
- 230000001939 inductive effect Effects 0.000 description 3
- 230000002457 bidirectional effect Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000006698 induction Effects 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 239000013589 supplement Substances 0.000 description 2
- 238000004458 analytical method Methods 0.000 description 1
- 238000003491 array Methods 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000033228 biological regulation Effects 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
Images
Classifications
-
- 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 provides a power decoupling circuit for a photovoltaic grid-connected inverter, and relates to circuit devices of alternating-current main lines or alternating-current power distribution networks. The power decoupling circuit is composed of a filter capacitor, an inductor, a decoupling capacitor A, a decoupling capacitor B, a switch tube A and a switch tube B. The decoupling capacitor A is in parallel connection with the filter capacitor after being in series connection with the decoupling capacitor B, a collector of the switch tube A in series connection with the switch tube B is connected to a positive pole node of the part, in parallel connection with the filter capacitor, of the decoupling capacitor A in series connection with the decoupling capacitor B,, an emitter of the switch tube B in series connection with the switch tube A is connected to a negative pole node of the part, in parallel connection with the filter capacitor, of the decoupling capacitor A in series connection with the decoupling capacitor B, and an intermediate node enabling the decoupling capacitor A to be in series connection with the decoupling capacitor B is connected to the connecting point of an emitter of the switch tube A and a collector of the switch tube B through the inductor. The defects that an existing photovoltaic grid-connected inverter needs large-capacity and large-size decoupling capacitors and is complex in structure and high in cost are overcome.
Description
Technical field
Technical scheme of the present invention relates to the circuit arrangement of ac mains or ac distribution network, specifically for the power decoupling circuit of photovoltaic combining inverter.
Background technology
In single-phase photovoltaic grid-connected inverter, for making the output power factor of inverter approach 1, the output current wave that needs control inverter be sinusoidal waveform and with line voltage same-phase, this power output that makes inverter is the pulsating power that doubles mains frequency.This pulsating power can produce low-frequency ripple on DC bus, and then causes the fluctuation of the voltage and current of photovoltaic array.Yet the energy sending in order to maximally utilise photovoltaic array, must make photovoltaic array fully approach its maximum power point operation.In order to be limited in the low-frequency ripple producing on DC bus, existing solution is the decoupling capacitance in photovoltaic array two ends the United Nations General Assembly, and for the DC bus-bar voltage of 400V, decoupling capacitance is generally 0.5mF/kW.This has increased volume and the cost of inverter undoubtedly.In order to reduce the capacity of required decoupling capacitance, people have proposed multiple power decoupling method.
The method that document < < Utility-connected power converter for maximizing power transfer from a photovoltaic source while drawing ripple-free current > > proposes has increased the voltage fluctuation amplitude of bus capacitor, make the withstand voltage increase of device, thereby the selection to the withstand voltage electric capacity of height brings difficulty, and the life-span of device also can reduce.The method that document < < DC bus regulation strategy for grid-connected V power generation system > > proposes is by after an inductance and a capacitances in series, be connected in parallel on again on DC bus, utilize the method for LC series resonance can effectively reduce the voltage fluctuation of bus.The L of this decoupling method and the value of C are very large, and the resonance current of its generation exists and to fluctuate widely, and increased unsteadiness, and this method are not suitable for small-power occasion to system.CN101841252A discloses a kind of photovoltaic combining inverter of active energy decoupling, utilizes the mode of two anti exciting converter shunt capacitances, and the complex structure of its device, volume is large and cost is high; CN102522766A has disclosed a kind of flyback type miniature photovoltaic grid connected inverter with power decoupling circuit and control method thereof, and the complex structure of this inverter needs three switching tubes, has increased control complexity, has also increased the volume in decoupling zero loop; CN102638059A has reported single-phase grid-connected photovoltaic power generation system power decoupling circuit and control method thereof, and the decoupling zero part of this circuit is between full-bridge inverting and grid-connected filter, all higher to the designing requirement of grid-connected filter and cost.
In a word, in existing single-phase photovoltaic grid-connected inverter device, still exist and need the decoupling capacitance of larger capacity and larger volume, complex structure, volume is large and cost is high defect.
Summary of the invention
Technical problem to be solved by this invention is: the power decoupling circuit that is provided for photovoltaic combining inverter, can ensure that DC bus-bar voltage is stabilized in 400V left and right, has overcome the defect that decoupling capacitance, complex structure, volume are large and cost is high that needs larger capacity and larger volume in existing grid-connected photovoltaic inverter device.
The present invention solves this technical problem adopted technical scheme: for the power decoupling circuit of photovoltaic combining inverter, a filtering capacitor, inductance, decoupling capacitance device A, decoupling capacitance device B, switching tube A and a switching tube B, consist of, wherein, in parallel with filtering capacitor after decoupling capacitance device A and decoupling zero capacitor B series connection, the collector electrode of switching tube A after switching tube A and switching tube B series connection is connected on the cathode node of decoupling capacitance device A and the rear part in parallel with filtering capacitor of decoupling zero capacitor B series connection, this cathode node is on a DC bus, the emitter of switching tube B after switching tube A and switching tube B series connection is connected on the negative pole node of decoupling capacitance device A and the rear part in parallel with filtering capacitor of decoupling zero capacitor B series connection, this negative pole node is on another DC bus, the intermediate node of decoupling capacitance device A and decoupling zero capacitor B series connection is connected on the tie point of switching tube A emitter and switching tube B collector electrode by inductance.
The above-mentioned power decoupling circuit for photovoltaic combining inverter, the capacitance of described filtering capacitor be 22 μ F and withstand voltage be 400V, the inductance value of inductance is 2mH, the capacitance of decoupling capacitance device A be 22 μ F and withstand voltage be 172V, the capacitance of decoupling capacitance device B be 136 μ F and withstand voltage be 320V, switching tube A and switching tube B all adopt insulated gate bipolar transistor IKP15N65H5.
The above-mentioned power decoupling circuit for photovoltaic combining inverter, wherein involved switching tube, capacitor, inductance are all known, all components and parts can obtain by the known approach such as being purchased, and the connection of all components and parts is all also the known line connecting method of those skilled in the art.
The above-mentioned power decoupling circuit for photovoltaic combining inverter, in the time of in being applied to photovoltaic combining inverter, this power decoupling circuit is near the positive and negative end of filtering capacitor and the positive and negative end of photovoltaic array is in parallel is connected on a DC bus again, this power decoupling circuit after near switching tube A and switching tube B series connection positive and negative end be connected with the positive and negative end of inverter input terminal respectively, inverter output end is connected with electrical network.The bidirectional Buck-Boost converter being comprised of two switching tubes and inductance couples together decoupling capacitance device A and decoupling zero capacitor B, make energy can be between decoupling capacitance device A and decoupling zero capacitor B bi-directional, two switching tubes make the voltage of decoupling capacitance device B have larger fluctuation to keep DC bus-bar voltage stable simultaneously, to realize the power decoupled between inverter input and output.The capacity of decoupling capacitance device B is larger, by it, stores the excess energy of photovoltaic array, and the capacity of filtering capacitor is very little, and its effect is keep DC bus-bar voltage stable.
The invention has the beneficial effects as follows: compared with prior art, substantive distinguishing features of the present invention is:
(1) according to the size of inverter power output, the present invention has following two kinds of mode of operations for the power decoupling circuit of photovoltaic combining inverter, 1. when the input power from photovoltaic array is greater than power output, power decoupling circuit is operated in charge mode: when switching tube, A is open-minded, decoupling capacitance device A electric discharge, electric current flows to the intermediate node of decoupling capacitance device A and decoupling zero capacitor B series connection from the emitter node of switching tube A through inductance, thereby the electric current of inductance increases, induction charging; When switching tube A turn-offs, inductance is by the anti-paralleled diode afterflow of decoupling capacitance device B and switching tube B, and inductive current reduces, decoupling capacitance device B charging in continuous current circuit.In this charge mode, the voltage of decoupling capacitance device A reduces gradually, and the voltage of decoupling capacitance device B increases gradually, from the excess energy of photovoltaic array, is stored in decoupling capacitance device B.2. when the input power from photovoltaic array is less than power output, power decoupling circuit is operated in discharge mode: when switching tube, B is open-minded, decoupling capacitance device B electric discharge, electric current flows to the collector node of switching tube B from the intermediate node of decoupling capacitance device A and decoupling zero capacitor B series connection, thereby inductive current increases, induction charging; When switching tube B turn-offs, inductance is by the anti-paralleled diode afterflow of decoupling capacitance device A and switching tube A, and inductive current reduces, and in continuous current circuit, decoupling capacitance device A charging, is released into the energy storing in main circuit by decoupling capacitance device A again.In this discharge mode, decoupling capacitance device B discharges the portion of energy having stored gradually, to supplement the energy of photovoltaic array deficiency, the voltage of decoupling capacitance device A increases gradually, the voltage of decoupling capacitance device B reduces gradually, the energy part that decoupling capacitance device B discharges is transferred in decoupling capacitance device A, and another part supplements the not enough energy that photovoltaic array goes out.This energy refers in discharge mode, and the energy of inverter output deducts the energy that photovoltaic array sends.
(2) the present invention is used for the power decoupling circuit of photovoltaic combining inverter in the application of photovoltaic combining inverter, the maximum voltage of decoupling capacitance device A and decoupling zero capacitor B is all lower than DC bus-bar voltage, and the reduction of capacitor rated voltage can significantly reduce the cost of the volume of capacitor.
Compared with prior art, marked improvement of the present invention is:
(1) the present invention, for the power decoupling circuit of photovoltaic combining inverter, when realizing power decoupled, can effectively reduce the capacity of required decoupling capacitance.By theory, calculate and derive, under the same conditions, while only using large electrochemical capacitor to realize power decoupled photovoltaic combining inverter, the capacitance of the electrochemical capacitor needing is 500 μ F, and while using the present invention for the power decoupling circuit of photovoltaic combining inverter, only need adopt capacitance for identical input-output power is the electrochemical capacitor of 180 μ F, and aspect the voltage that need bear in the maximum of capacitor, the former is maximum is withstand voltagely required to be DC bus-bar voltage 400V, and the latter is only 320V.Thereby in the present invention, for the power decoupling circuit of photovoltaic combining inverter, reduced the volume of electric capacity, increased under the same conditions the power density of photovoltaic inverting system simultaneously.
(2) the present invention is for the power decoupling circuit of photovoltaic combining inverter, can make lower voltage that decoupling capacitance bears to being less than DC bus-bar voltage, the cost and the volume that are conducive to reduce whole circuit arrangement, be specially adapted to little power single phase photovoltaic grid-connected inverting system.
(3) the present invention, for the power decoupling circuit of photovoltaic combining inverter, can ensure that DC bus-bar voltage is stabilized in 400V left and right, thereby reduce the voltage ripple of DC bus, and be conducive to realize the tracking of maximum power point.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the present invention is further described.
Fig. 1 is that the present invention is for the structural representation of the power decoupling circuit of photovoltaic combining inverter.
Fig. 2 is the schematic diagram of the application of the present invention in photovoltaic combining inverter.
Fig. 3 is that the present invention is for the waveform correlation schematic diagram of the power decoupling circuit of photovoltaic combining inverter.
Fig. 4 is the course of work principle schematic that the present invention is applied to photovoltaic combining inverter.
Fig. 5 is that the application test result of the embodiment of the present invention is tested the main waveform obtaining.
In figure, 1. decoupling capacitance device A, 2. decoupling capacitance device B, 3. filtering capacitor, 4. switching tube A, 5. switching tube B, 6. inductance, 7. intermediate node, the 8. tie point of switching tube A emitter and switching tube B collector electrode, 9. cathode node, 10. negative pole node, 11. photovoltaic arrays, 12. inverters, 13. electrical networks, 14. DC buss
Embodiment
Embodiment illustrated in fig. 1 showing, for the power decoupling circuit of photovoltaic combining inverter, by a filtering capacitor 3, inductance 6, decoupling capacitance device A1, decoupling capacitance device B2, switching tube A4 and a switching tube B5, formed, wherein, in parallel with filtering capacitor 3 after decoupling capacitance device A1 and decoupling zero capacitor B2 series connection, the collector electrode of switching tube A4 after switching tube A4 and switching tube B5 series connection is connected on the cathode node 9 of decoupling capacitance device A1 and the rear part in parallel with filtering capacitor 3 of decoupling zero capacitor B2 series connection, this cathode node 9 is on a DC bus 14, the emitter of switching tube B5 after switching tube A4 and switching tube B5 series connection is connected on the negative pole node 10 of decoupling capacitance device A1 and the rear part in parallel with filtering capacitor 3 of decoupling zero capacitor B2 series connection, this negative pole node is on another DC bus 14, the intermediate node 7 of decoupling capacitance device A1 and decoupling zero capacitor B2 series connection is connected on the tie point 8 of switching tube A emitter and switching tube B collector electrode by inductance.
Embodiment illustrated in fig. 2 showing, the applicable cases of the present invention in photovoltaic combining inverter is: in this figure the present invention shown in dotted line frame for the power decoupling circuit (explanation of embodiment as shown in Figure 1) of photovoltaic combining inverter near the positive and negative end of filtering capacitor 3 and the positive and negative end of photovoltaic array 11 is in parallel is connected to a DC bus 14 again, this power decoupling circuit after near switching tube A4 and switching tube B5 series connection positive and negative end be connected with the positive and negative end of inverter 12 inputs respectively, inverter 12 outputs are connected with electrical network 13.The bidirectional Buck-Boost converter being comprised of switching tube A4, switching tube B5 and inductance 6 couples together decoupling capacitance device A1 and decoupling zero capacitor B2, make energy can be between decoupling capacitance device A1 and decoupling zero capacitor B2 bi-directional, switching tube A4 and switching tube B5 make the voltage of decoupling capacitance device B2 have larger fluctuation to keep DC bus 14 voltage stabilizations simultaneously, to realize the power decoupled between inverter 12 input and output.The capacity of decoupling capacitance device B2 is larger, by it, stores the excess energy of photovoltaic array 11, and the capacity of filtering capacitor 3 is very little, and its effect is keep DC bus 14 voltages stable.
Embodiment illustrated in fig. 3 showing, at output voltage P
oamong the one-period of fluctuation, t
2-t
3in time period, P
pv>P
o, capacitor C
2charging, C
2voltage by U
c2 (min)be elevated to U
c2 (max), corresponding to the course of work diagram of Fig. 4 a and Fig. 4 b illustrated embodiment.T
3-t
4in time period, P
pv<P
o, capacitor C
2electric discharge, C
2voltage by U
c2 (max)be reduced to U
c2 (min), corresponding to the course of work diagram of Fig. 4 c and Fig. 4 d illustrated embodiment.
Embodiment illustrated in fig. 4 showing, the course of work principle that the present invention is applied to photovoltaic combining inverter is: Fig. 4 a shows, the present invention shown in dotted line frame is for the part of the power decoupling circuit (explanation of embodiment as shown in Figure 1) of photovoltaic combining inverter, switching tube A4 is open-minded, decoupling capacitance device A1 electric discharge, electric current flows to the intermediate node 7 of decoupling capacitance device A1 and decoupling zero capacitor B2 series connection from the emitter node 8 of switching tube A4, thereby inductance 6 electric currents increase, inductance 6 chargings; Fig. 4 b shows, the present invention shown in dotted line frame is for the part of the power decoupling circuit (explanation of embodiment as shown in Figure 1) of photovoltaic combining inverter, switching tube A4 turn-offs, inductance 6 is by the anti-paralleled diode afterflow of decoupling capacitance device B2 and switching tube B5, inductance 6 electric currents reduce, decoupling capacitance device B2 charging in continuous current circuit; Fig. 4 c shows, the present invention shown in dotted line frame is for the part of the power decoupling circuit (explanation of embodiment as shown in Figure 1) of photovoltaic combining inverter, switching tube B5 is open-minded, decoupling capacitance device B2 electric discharge, electric current flows to the collector node 8 of switching tube B5 from the intermediate node 7 of decoupling capacitance device A1 and decoupling zero capacitor B2 series connection, thereby inductance 6 electric currents increase, inductance 6 chargings; Fig. 4 d shows, the present invention shown in dotted line frame is for the part of the power decoupling circuit (explanation of embodiment as shown in Figure 1) of photovoltaic combining inverter, switching tube B5 turn-offs, inductance 6 is by the anti-paralleled diode afterflow of decoupling capacitance device A1 and switching tube A4, inductance 6 electric currents reduce, decoupling capacitance device A1 charging in continuous current circuit.
Embodiment
The composition of the power decoupling circuit for photovoltaic combining inverter of the present embodiment is as shown in Fig. 1 embodiment, and its connection and methods for using them in photovoltaic combining inverter is as shown in Fig. 2 embodiment.The voltage that keeps DC bus 14 in application is 400V(± 2%), photovoltaic combining inverter output voltage 220V/50Hz, power output is 1kW, this switching frequency for the power decoupling circuit of photovoltaic combining inverter is 40kHz, decoupling capacitance device A1 be 22 μ F and withstand voltage be 172V, decoupling capacitance device B2 be 136 μ F and withstand voltage be 320V, filter capacitor 3 be 22 μ F and withstand voltage be 400V.Switching tube A4 and switching tube B5 all adopt insulated gate bipolar transistor IKP15N65H5, and inductance 6 is 2mH, and electrical network 13 frequencies are 50Hz.
Fig. 5 has provided the application test result of the embodiment of the present invention and has tested the main waveform obtaining.As shown in this figure, the output current of photovoltaic combining inverter is sinusoidal waveform, the minimum voltage u of decoupling capacitance device B2
c2 (min)with maximum voltage u
c2 (max)be respectively 219V and 315V, its magnitude of a voltage fluctuation is 86V, average voltage U
m=272V.And the minimum and maximum value of the voltage of DC bus 14 is respectively 408V and 392V, ripple factor is 4%.This experimental result and theory analysis are basically identical.
In above-described embodiment, involved photovoltaic array, switching tube, capacitor, inductance, photovoltaic combining inverter and electrical network are all known, all components and parts can obtain by the known approach such as being purchased, and the method for attachment of all components and parts is all also the known common line connecting methods of those skilled in the art.
Claims (2)
1. for the power decoupling circuit of photovoltaic combining inverter, it is characterized in that: by a filtering capacitor, inductance, decoupling capacitance device A, decoupling capacitance device B, switching tube A and a switching tube B, formed, wherein, in parallel with filtering capacitor after decoupling capacitance device A and decoupling zero capacitor B series connection, the collector electrode of switching tube A after switching tube A and switching tube B series connection is connected on the cathode node of decoupling capacitance device A and the rear part in parallel with filtering capacitor of decoupling zero capacitor B series connection, this cathode node is on a DC bus, the emitter of switching tube B after switching tube A and switching tube B series connection is connected on the negative pole node of decoupling capacitance device A and the rear part in parallel with filtering capacitor of decoupling zero capacitor B series connection, this negative pole node is on another DC bus, the intermediate node of decoupling capacitance device A and decoupling zero capacitor B series connection is connected on the tie point of switching tube A emitter and switching tube B collector electrode by inductance.
2. according to the said power decoupling circuit for photovoltaic combining inverter of claim 1, it is characterized in that: the capacitance of described filtering capacitor is 22 μ F and the withstand voltage 400V of being, the inductance value of inductance is 2mH, the capacitance of decoupling capacitance device A be 22 μ F and withstand voltage be 172V, the capacitance of decoupling capacitance device B be 136 μ F and withstand voltage be 320V, switching tube A and switching tube B all adopt insulated gate bipolar transistor IKP15N65H5.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310631131.5A CN103606956B (en) | 2013-11-29 | 2013-11-29 | For the power decoupling circuit of photovoltaic combining inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310631131.5A CN103606956B (en) | 2013-11-29 | 2013-11-29 | For the power decoupling circuit of photovoltaic combining inverter |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103606956A true CN103606956A (en) | 2014-02-26 |
| CN103606956B CN103606956B (en) | 2015-09-09 |
Family
ID=50125161
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310631131.5A Active CN103606956B (en) | 2013-11-29 | 2013-11-29 | For the power decoupling circuit of photovoltaic combining inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN103606956B (en) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104619076A (en) * | 2014-12-11 | 2015-05-13 | 江苏大学 | Electrolytic capacitance-free interleaved flyback LED (light emitting diode) driving power source |
| US10097108B2 (en) | 2014-12-16 | 2018-10-09 | Abb Schweiz Ag | Energy panel arrangement power dissipation |
| US10348094B2 (en) | 2015-01-28 | 2019-07-09 | Abb Schweiz Ag | Energy panel arrangement shutdown |
| US10404060B2 (en) | 2015-02-22 | 2019-09-03 | Abb Schweiz Ag | Photovoltaic string reverse polarity detection |
| CN110401361A (en) * | 2019-06-27 | 2019-11-01 | 武汉华中数控股份有限公司 | Servo-drive power module and its working method |
| WO2021022915A1 (en) * | 2019-08-06 | 2021-02-11 | 山东大学 | Single-phase device-reusing type active power uncoupling cascade rectifier and control method therefor |
| CN112910296A (en) * | 2021-01-07 | 2021-06-04 | 元山(济南)电子科技有限公司 | Single-phase inverter |
| CN107508479B (en) * | 2017-08-01 | 2024-01-30 | 华东交通大学 | Four-switch alternating-current side power decoupling circuit and decoupling control method |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102214994A (en) * | 2010-04-07 | 2011-10-12 | 上海航锐电源科技有限公司 | Input-series and output-series boost converter, voltage-equalizing and current-equalizing control circuit and voltage-equalizing and current-equalizing control method |
| CN203632261U (en) * | 2013-11-29 | 2014-06-04 | 河北工业大学 | Power decoupling circuit for photovoltaic grid-connected inverter |
-
2013
- 2013-11-29 CN CN201310631131.5A patent/CN103606956B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102214994A (en) * | 2010-04-07 | 2011-10-12 | 上海航锐电源科技有限公司 | Input-series and output-series boost converter, voltage-equalizing and current-equalizing control circuit and voltage-equalizing and current-equalizing control method |
| CN203632261U (en) * | 2013-11-29 | 2014-06-04 | 河北工业大学 | Power decoupling circuit for photovoltaic grid-connected inverter |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104619076A (en) * | 2014-12-11 | 2015-05-13 | 江苏大学 | Electrolytic capacitance-free interleaved flyback LED (light emitting diode) driving power source |
| CN104619076B (en) * | 2014-12-11 | 2017-06-27 | 江苏大学 | A kind of no electrolytic capacitor crisscross parallel flyback LED drive power |
| US10097108B2 (en) | 2014-12-16 | 2018-10-09 | Abb Schweiz Ag | Energy panel arrangement power dissipation |
| US10348094B2 (en) | 2015-01-28 | 2019-07-09 | Abb Schweiz Ag | Energy panel arrangement shutdown |
| US10404060B2 (en) | 2015-02-22 | 2019-09-03 | Abb Schweiz Ag | Photovoltaic string reverse polarity detection |
| CN107508479B (en) * | 2017-08-01 | 2024-01-30 | 华东交通大学 | Four-switch alternating-current side power decoupling circuit and decoupling control method |
| CN110401361A (en) * | 2019-06-27 | 2019-11-01 | 武汉华中数控股份有限公司 | Servo-drive power module and its working method |
| WO2021022915A1 (en) * | 2019-08-06 | 2021-02-11 | 山东大学 | Single-phase device-reusing type active power uncoupling cascade rectifier and control method therefor |
| US11444548B2 (en) | 2019-08-06 | 2022-09-13 | Shandong University | Single-phase device-multiplexing active power decoupling cascaded rectifier and control method thereof |
| CN112910296A (en) * | 2021-01-07 | 2021-06-04 | 元山(济南)电子科技有限公司 | Single-phase inverter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN103606956B (en) | 2015-09-09 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103606956B (en) | For the power decoupling circuit of photovoltaic combining inverter | |
| CN107070215B (en) | Three-level boost common-ground system and control method thereof | |
| CN105471238A (en) | Direct current bus voltage ripple compensating method and photovoltaic inverter | |
| CN103607107B (en) | Boosting and voltage reducing hybrid power decoupling circuit for photovoltaic grid-connected inverter | |
| CN101980409A (en) | Grid-connected photovoltaic inverter | |
| CN102361408A (en) | Non-isolated photovoltaic grid-connected inverter and switching control time sequence thereof | |
| CN202818111U (en) | Boosting LLC resonant converter | |
| CN203617896U (en) | Boost and buck hybrid power decoupling circuit used for photovoltaic grid-connected inverter | |
| CN102355125B (en) | Soft start circuit of converter | |
| CN105529941A (en) | PFC rectifier and uninterrupted power source | |
| CN109347331A (en) | A kind of tri-level switch power-supply system and its bus voltage eqaulation control method | |
| CN102769394B (en) | Single-phase controllable rectification circuit | |
| CN203632261U (en) | Power decoupling circuit for photovoltaic grid-connected inverter | |
| CN203911800U (en) | High-frequency isolated photovoltaic inverter | |
| CN105978322A (en) | Switch capacitor type high-gain quasi Z source DC-DC converter | |
| Pahlevaninezhad et al. | A ZVS phase-shift full-bridge DC/DC converter with optimized reactive current used for electric vehicles | |
| CN102394553B (en) | Modulation method and device of double-Buck circuit | |
| CN102403884B (en) | Modulation method and device for double-Buck circuit | |
| WO2015078093A1 (en) | Ac-ac power source conversion device and conversion method thereof | |
| CN106033939A (en) | LCL non-isolation type grid-connected inverter system | |
| CN104539180A (en) | Single-phase transformer-free inverter capable of reducing system leak current | |
| CN205336138U (en) | Two boost voltage -multiplying PFC converters of high efficiency | |
| CN103269160A (en) | Three-state direct current-direct current converter and control method thereof | |
| CN110061523B (en) | Multifunctional single-phase grid-connected inversion system and method with novel topological structure | |
| CN102891602A (en) | Three-level DC converter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20231023 Address after: Room 202, Inspection Warehouse Office Area, No. 6262 Australia Road, Tianjin Binhai New Area Free Trade Pilot Zone (Dongjiang Comprehensive Bonded Zone), 300450 (Tianjin Dongjiang Business Secretary Service Co., Ltd. Free Trade Branch Trusteeship No. 8154) Patentee after: Yasin Perception Technology (Tianjin) Co.,Ltd. Address before: 300401 Hebei University of Technology, 5340 Xiping Road, Beichen District, Tianjin Patentee before: Hebei University of Technology |
|
| TR01 | Transfer of patent right |