CN101841252A - Photovoltaic grid-connected inverter for active energy decoupling - Google Patents
Photovoltaic grid-connected inverter for active energy decoupling Download PDFInfo
- Publication number
- CN101841252A CN101841252A CN 201010173131 CN201010173131A CN101841252A CN 101841252 A CN101841252 A CN 101841252A CN 201010173131 CN201010173131 CN 201010173131 CN 201010173131 A CN201010173131 A CN 201010173131A CN 101841252 A CN101841252 A CN 101841252A
- Authority
- CN
- China
- Prior art keywords
- output
- switch pipe
- exciting converter
- converter
- anti exciting
- 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 63
- 230000008859 change Effects 0.000 claims description 51
- 238000004804 winding Methods 0.000 claims description 44
- 238000012546 transfer Methods 0.000 claims description 7
- 238000006243 chemical reaction Methods 0.000 abstract description 14
- 230000010349 pulsation Effects 0.000 abstract description 3
- 230000007547 defect Effects 0.000 abstract 1
- 239000003792 electrolyte Substances 0.000 abstract 1
- 230000001105 regulatory effect Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 8
- 230000008901 benefit Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000011161 development Methods 0.000 description 2
- 238000010248 power generation Methods 0.000 description 2
- 238000013459 approach Methods 0.000 description 1
- 230000004888 barrier function Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000011217 control strategy Methods 0.000 description 1
- 230000007812 deficiency Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000003912 environmental pollution Methods 0.000 description 1
- 238000001914 filtration Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 239000012528 membrane Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000003287 optical effect Effects 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001172 regenerating effect Effects 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
Landscapes
- Inverter Devices (AREA)
Abstract
The invention aims to disclose a photovoltaic grid-connected inverter for active energy decoupling, which comprises a first flyback converter, a second flyback converter, a voltage regulating converter, an output filter circuit and an inverter circuit. The decoupling of the output power of the photovoltaic grid-connected inverter and the output power of a solar photovoltaic array is realized, pulsation of the output power of the solar photovoltaic array is greatly reduced, the fluctuation loss caused by maximum power point tracking (MPPT) is reduced, and the conversion efficiency of the photovoltaic array is improved; only a non-electrolyte capacitor with small capacity and high reliability is adopted, the defects that the service life of the photovoltaic grid-connected inverter is shortened and the reliability is reduced caused by adopting an electrolytic capacitor are overcome, the service life and the reliability of the photovoltaic grid-connected inverter are improved; and the peak power of a transformer in the flyback converter is reduced, the volume of the transformer is reduced, the loss is effectively reduced, and the conversion efficiency is improved, so that the aim of the invention is realized.
Description
Technical field
The present invention relates to a kind of solar photovoltaic interconnected inverter, particularly a kind of solar photovoltaic grid-connection technical field of power generation only needs to use the low capacity non-electrolytic capacitor can realize the photovoltaic combining inverter of the active energy decoupling zero of power decoupled.
Background technology
Solar energy has boundless application and development prospect as a kind of pollution-free, reproducible new forms of energy, along with The development in society and economy, utilize solar power generation to become a reliable approach that solves the productive life energy, improves problem of environmental pollution, can obtain huge economic benefit and social benefit, solar energy has become after waterpower, wind-force in China, topmost regenerative resource.
Photovoltaic combining inverter is the bridge that the solar energy photovoltaic array is connected with electrical network, is the core of photovoltaic generating system, and the height of its efficient, the quality of reliability will directly influence the performance of overall optical photovoltaic generating system.
In traditional photovoltaic generating system, form solar energy photovoltaic array (PV) by many groups optical-electric module and obtain sufficiently high DC bus-bar voltage, produce alternating voltage by the photovoltaic combining inverter inversion again and be connected to the grid; Because blocking of barriers such as the variation of solar irradiation intensity and nearby buildings, trees, the gross output of solar energy photovoltaic array (PV) has obvious variation, for photovoltaic generating system is always worked on the maximum power point, the notion of AC module is suggested.The AC module has that cost is low, single-stage power conversion, generating efficiency height, be easy to advantages such as expansion, obtained extensive studies, and there are many inverter topologies and corresponding control strategies to be in the news, be representative wherein with the inverse-excitation type inverter, the inverse-excitation type inverter can be operated in the resonant type soft-switch state, has higher conversion efficiency.
In solar energy grid-connected photovoltaic system, solar energy photovoltaic array (PV) power output is a smooth direct current, and the combining inverter power output presents the characteristic of periodically pulsing, therefore the direct current input side at combining inverter needs very big electrochemical capacitor in parallel to realize the decoupling zero of solar energy photovoltaic array (PV) power output and combining inverter power output, but the introducing of electrochemical capacitor has not only increased the volume of whole solar energy grid-connected photovoltaic system, and shortened useful life of solar energy grid-connected photovoltaic system greatly, reduced the reliability of solar energy grid-connected photovoltaic system.
Summary of the invention
The object of the present invention is to provide a kind of photovoltaic combining inverter of active energy decoupling zero, at the deficiencies in the prior art, by the parallel-connection decoupling mode, only need to use the low capacity non-electrolytic capacitor that part power is implemented twice high frequency conversion and can realize power decoupled, be applicable to the solar photovoltaic interconnected inverter of AC module, the HF power conversion progression of equivalence is 1.318.
Technical problem solved by the invention can realize by the following technical solutions:
A kind of photovoltaic combining inverter of active energy decoupling zero is characterized in that, it comprises first anti exciting converter, second anti exciting converter, pressure regulation converter, output filter circuit and inverter circuit; The output voltage of solar energy photovoltaic array is connected with the input of first anti exciting converter and the input of second anti exciting converter respectively by an input filter capacitor that is connected in parallel on the output voltage of photovoltaic array, the output of described second anti exciting converter is connected with the input of described pressure regulation converter by a decoupling capacitance that is connected in parallel on the output of described second anti exciting converter, the output of described first anti exciting converter is connected to each other with the output of described pressure regulation converter and is connected with the input of described output filter capacitor, and the output of described output filter capacitor is connected with described inverter circuit.
In one embodiment of the invention, described first anti exciting converter comprises the first former limit switching tube, the first anti-violent change depressor and the first secondary rectifier diode; The end of the same name of the former limit winding of the described first anti-violent change depressor is connected with the positive ends of the output voltage of solar energy photovoltaic array and an end of described input filter capacitor, the non-same polarity of the former limit winding of the described first anti-violent change depressor is connected with the drain electrode of the described first former limit switching tube, the source electrode of the described first former limit switching tube and described second anti exciting converter, the negative polarity end of the output voltage of the other end of described input filter capacitor and solar energy photovoltaic array connects, the non-same polarity of the secondary winding of the described first anti-violent change depressor is connected with the anode of the described first secondary rectifier diode, the negative electrode of the described first secondary rectifier diode is connected to the input of described output filter circuit, and the end of the same name of the secondary winding of the described first anti-violent change depressor is connected with described inverter circuit and ground connection with described output filter circuit successively.
In one embodiment of the invention, described second anti exciting converter comprises the second former limit switching tube, the second anti-violent change depressor and the second secondary rectifier diode; The end of the same name of the former limit winding of the described second anti-violent change depressor is connected with the positive ends of the output voltage of solar energy photovoltaic array and an end of described input filter capacitor, the non-same polarity of the former limit winding of the described second anti-violent change depressor is connected with the drain electrode of the described second former limit switching tube, the source electrode of the described second former limit switching tube and described first anti exciting converter, the negative polarity end of the output voltage of the other end of described input filter capacitor and solar energy photovoltaic array connects, the non-same polarity of the secondary winding of the described second anti-violent change depressor is connected with the anode of the described second secondary rectifier diode, the negative electrode of the described second secondary rectifier diode and an end of described decoupling capacitance are connected and are connected to the input of described pressure regulation converter, and the end of the same name of the secondary winding of the described second anti-violent change depressor and the other end of described decoupling capacitance are connected and are connected to the input of described pressure regulation converter.
In one embodiment of the invention, described output filter circuit comprises output filter capacitor and output inductor; One end of described output filter capacitor is connected to each other with an end of described output inductor and is connected with the output of described first anti exciting converter and the output of second anti exciting converter respectively, the other end of described output filter capacitor is connected with described inverter circuit and ground connection with described first anti exciting converter respectively, and the other end of described output inductor is connected with the input of described inverter circuit.
In one embodiment of the invention, described inverter circuit comprises the first inverse switch pipe, the second inverse switch pipe, the 3rd inverse switch pipe and the 4th inverse switch pipe; The drain electrode of the described first inverse switch pipe is connected to each other with the drain electrode of described the 3rd inverse switch pipe and is connected with the output of described output filter circuit, the source electrode of the described first inverse switch pipe and the drain electrode of the described second inverse switch pipe are connected and connect an end of electrical network, the source electrode of described the 3rd inverse switch pipe and the drain electrode of described the 4th inverse switch pipe are connected and connect the other end of electrical network, and the source electrode of the described second inverse switch pipe is connected with the source electrode of described the 4th inverse switch pipe and ground connection.
In one embodiment of the invention, described pressure regulation converter comprises boost inductance, the first boosted switch pipe, second boosted switch pipe and the booster diode; One end of described boost inductance is connected with an end of the output of described second anti exciting converter and described decoupling capacitance, the other end of described boost inductance is connected with the drain electrode of the described first boosted switch pipe and the drain electrode of the described second boosted switch pipe respectively, the source electrode of the described first boosted switch pipe connects described first anti exciting converter respectively, the other end of described second anti exciting converter and described decoupling capacitance and ground connection, the source electrode of the described second boosted switch pipe is connected with the anode of described booster diode, and the negative electrode of described booster diode is connected with described output filter circuit with described first anti exciting converter respectively.
In one embodiment of the invention, described pressure regulation converter comprises boost inductance, the first boosted switch pipe, second boosted switch pipe and the booster diode; One end of described boost inductance is connected with an end of the output of described second anti exciting converter and described decoupling capacitance, the other end of described boost inductance is connected with the drain electrode of the described second boosted switch pipe, the source electrode of the described second boosted switch pipe is connected with the drain electrode of the described first boosted switch pipe and the anode of described booster diode respectively, the negative electrode of described booster diode is connected with described output filter circuit with described first anti exciting converter respectively, and the source electrode of the described first boosted switch pipe connects described first anti exciting converter respectively, the other end of described second anti exciting converter and described decoupling capacitance and ground connection.
In one embodiment of the invention, described pressure regulation converter comprises buck inductor, step-down switching pipe and buck diode; The drain electrode of described step-down switching pipe is connected with the output of described second anti exciting converter and an end of described decoupling capacitance, the source electrode of described step-down switching pipe connects an end of described buck inductor and the negative electrode of described buck diode respectively, the anode of described buck diode connects the other end and the ground connection of described first anti exciting converter, described second anti exciting converter and described decoupling capacitance respectively, and the other end of described buck inductor is connected with described output filter circuit with described first anti exciting converter respectively.
In one embodiment of the invention, described input filter capacitor, decoupling capacitance and output filter capacitor are non-electrolytic capacitor.
In one embodiment of the invention, the described first former limit switching tube, the second former limit switching tube, the first boosted switch pipe and the second boosted switch pipe are the HF switch pipe, the described first inverse switch pipe, the second inverse switch pipe, the 3rd inverse switch pipe and the 4th inverse switch pipe are the power frequency switching tube, and the operating frequency of the described second boosted switch pipe is the twice power frequency.
In one embodiment of the invention, when the power output of photovoltaic combining inverter is not more than the power output of solar energy photovoltaic array, first back exciting converter and the second back exciting converter co-operation, the pressure regulation converter is not worked, the power output of first back exciting converter through output filter circuit and inverter circuit with power transfer to electrical network, also promptly the power output of first back exciting converter equals the power output of photovoltaic combining inverter, the surplus power of solar energy photovoltaic array output is stored in the decoupling capacitance through second back exciting converter, and the power output sum of first back exciting converter and second back exciting converter equals the power output of solar energy photovoltaic array.
In one embodiment of the invention, when the power output of photovoltaic combining inverter during greater than the power output of solar energy photovoltaic array, first back exciting converter and pressure regulation converter co-operation, second back exciting converter is not worked, the second boosted switch pipe is in conducting state always, the power output of first back exciting converter equals the power output of solar energy photovoltaic array, the power output of first back exciting converter and pressure regulation converter through output filter circuit and inverter circuit with power transfer to electrical network, also promptly first back exciting converter and pressure regulation converter power output sum equal the power output of solar photovoltaic interconnected inverter.
The photovoltaic combining inverter of active energy decoupling zero of the present invention has following characteristics and technique effect:
(1) by power pulsations being converted into the mains ripple on the decoupling capacitance, and because the electric pressure on the decoupling capacitance is higher than order of magnitude of input voltage, make the decoupling capacitance capacity can present the minimizing of two orders of magnitude, promptly only need use the non-electrolytic capacitor of low capacity can realize power decoupled, thereby avoided the use electrochemical capacitor, improved lifetime of system and reliability;
(2) only partly decoupled power has passed through Two Stages, has improved conversion efficiency;
(3) input and output high frequency electrical isolation, and the peak power of anti-violent change depressor reduces greatly, reduced anti-violent change depressor volume, helps improving power density, improves conversion efficiency.
The photovoltaic combining inverter of active energy decoupling zero of the present invention, realized the decoupling zero of photovoltaic combining inverter power output and photovoltaic array output power, reduced the pulsation of photovoltaic array output power greatly, reduce the fluctuation loss that causes owing to MPPT maximum power point tracking (MPPT), improved the conversion efficiency of photovoltaic array; Only need to adopt the non-electrolytic capacitor of low capacity, high reliability, overcome, improved the life-span and the reliability of photovoltaic combining inverter owing to the shortcoming that adopts electrochemical capacitor to cause the photovoltaic combining inverter lost of life, reliability to reduce; Reduce the peak power of transformer in the anti exciting converter, reduced volume of transformer, helped reducing the wastage, improved conversion efficiency, realized purpose of the present invention.
Characteristics of the present invention can be consulted the detailed description of the graphic and following better execution mode of this case and be obtained to be well understood to.
Description of drawings
Fig. 1 is the circuit theory diagrams of the photovoltaic combining inverter of active energy decoupling zero of the present invention;
Fig. 2 is that the various piece of photovoltaic combining inverter of active energy decoupling zero of the present invention is at the schematic diagram of line voltage power output in the cycle;
Fig. 3 is the equivalent circuit diagram of the photovoltaic combining inverter mode one of active energy decoupling zero of the present invention;
Fig. 4 is the equivalent circuit diagram of the photovoltaic combining inverter mode two of active energy decoupling zero of the present invention;
Fig. 5 is the waveform schematic diagram of the photovoltaic combining inverter of active energy decoupling zero of the present invention in the groundwork in the cycle of a line voltage;
Fig. 6 is the circuit theory diagrams of embodiments of the invention 2;
Fig. 7 is the circuit theory diagrams of embodiments of the invention 3.
Reference numeral:
10-first anti exciting converter; 20-second anti exciting converter; The 30-booster circuit; The 40-output filter circuit; 50-power frequency inverter circuit; PV-solar energy photovoltaic array; C
In-input filter capacitor; S
P1, S
P2Be respectively first, second former limit switching tube; T
1, T
2Be respectively first, second anti-violent change depressor; N
P1, N
S1Be respectively the former limit winding and the secondary winding of the first anti-violent change depressor; N
P2, N
S2Be respectively the former limit winding and the secondary winding of the second anti-violent change depressor; D
S1, D
S2Be respectively first, second secondary rectifier diode; C
D-decoupling capacitance; L
B-boost inductance; S
B1, S
B2Be respectively first, second boosted switch pipe; D
B-booster diode; C
O-output filter capacitor; L
O-output inductor; S
1～S
4Be respectively first to fourth inverse switch pipe; u
PVBe the photovoltaic array output voltage; u
GBe line voltage; p
o-solar photovoltaic interconnected inverter power output; P
PV-photovoltaic array power output; p
1-the first anti exciting converter power output; p
2-the second anti exciting converter power output; p
Bo-booster circuit power output; The angular frequency of ω-line voltage; T is the time; i
o-output grid-connected current.
Embodiment
For technological means, creation characteristic that the present invention is realized, reach purpose and effect is easy to understand, below in conjunction with concrete diagram, further set forth the present invention.
As shown in Figure 1, the photovoltaic combining inverter of active energy decoupling zero of the present invention, it comprises first anti exciting converter 10, second anti exciting converter 20, pressure regulation converter 30, output filter circuit 40 and inverter circuit 50; The output voltage u of solar energy photovoltaic array PV
PVBy an output voltage u who is connected in parallel on photovoltaic array PV
PVOn input filter capacitor C
InBe connected with the input of first anti exciting converter 10 and the input of second anti exciting converter 20 respectively, the output of second anti exciting converter 20 is by a decoupling capacitance C who is connected in parallel on the output of second anti exciting converter 20
DBe connected with the input of pressure regulation converter 30, the output of first anti exciting converter 10 is connected to each other with the output of pressure regulation converter 30 and is connected with the input of output filter capacitor 40, and the output of output filter capacitor 40 is connected with inverter circuit 50.
In an embodiment, first anti exciting converter 10 comprises the first former limit switching tube S
P1, the first anti-violent change depressor T
1With the first secondary rectifier diode D
S1, the first anti-violent change depressor T
1Comprise former limit winding N
P1With secondary winding N
S1Second anti exciting converter 20 comprises the second former limit switching tube S
P2, the second anti-violent change depressor T
2With the second secondary rectifier diode D
S2, the second anti-violent change depressor T
2Comprise former limit winding N
P2With secondary winding N
S2 Pressure regulation converter 30 comprises boost inductance L
B, the first boosted switch pipe S
B1, the second boosted switch pipe S
B2And booster diode D
B Output filter circuit 40 comprises output filter capacitor C
OWith output inductor L
OInverter circuit 50 comprises the first inverse switch pipe S
1, the second inverse switch pipe S
2, the 3rd inverse switch pipe S
3And the 4th inverse switch pipe S
4
The output voltage u of solar energy photovoltaic array PV
PVPositive ends and input filter capacitor C
InAn end, the first anti-violent change depressor T of first anti exciting converter 10
1Former limit winding N
P1End of the same name and the second anti-violent change depressor T of second anti exciting converter 20
2Former limit winding N
P2End of the same name link to each other the first anti-violent change depressor T of first anti exciting converter 10
1Former limit winding N
P1The non-same polarity and the first former limit switching tube S
P1Drain electrode link to each other the first former limit switching tube S of first anti exciting converter 10
P1Source electrode and the second former limit switching tube S of second anti exciting converter 20
P2Source electrode, input filter capacitor C
InThe other end and the output voltage u of solar energy photovoltaic array PV
PVThe negative polarity end link to each other the second former limit switching tube S of second anti exciting converter 20
P2The drain electrode and the second anti-violent change depressor T
2Former limit winding N
P2Non-same polarity link to each other the first anti-violent change depressor T of first anti exciting converter 10
1Secondary winding N
S1The non-same polarity and the first secondary rectifying tube D
S1Anode link to each other the second anti-violent change depressor T of second anti exciting converter 20
2Secondary winding N
S2The non-same polarity and the second secondary rectifier diode D
S2Anode link to each other the second secondary rectifier diode D
S2Negative electrode respectively with decoupling capacitance C
DAn end and the boost inductance L of pressure regulation converter 30
BAn end link to each other boost inductance L
BThe other end respectively with the first boosted switch pipe S of pressure regulation converter 30
B1The drain electrode and the second boosted switch pipe S
B2Drain electrode link to each other the second boosted switch pipe S
B2Source electrode and booster diode D
BAnode link to each other booster diode D
BNegative electrode respectively with the first secondary rectifying tube D of first anti exciting converter 10
S1Negative electrode, the output filter capacitor C of output filter circuit 40
OAn end and the output inductor L of output filter circuit 40
OAn end link to each other the first boosted switch pipe S of pressure regulation converter 30
B1Source electrode be connected to the first anti-violent change depressor T of first anti exciting converter 10
1Secondary winding N
S1End of the same name, the second anti-violent change depressor T of second anti exciting converter 20
2Secondary winding N
S2End of the same name, decoupling capacitance C
DThe other end, output filter capacitor C
OThe other end, the second inverse switch pipe S of inverter circuit 50
2Source electrode and the 4th inverse switch pipe S
4Source electrode, the output inductor L of output filter circuit 40
OThe other end be connected in the first inverse switch pipe S respectively
1Drain electrode and the 3rd inverse switch pipe S
3Drain electrode, the first inverse switch pipe S
1Source electrode be connected in the second inverse switch pipe S respectively
2Drain electrode and electrical network u
GAn end, the 3rd inverse switch pipe S
3Source electrode be connected in the 4th inverse switch pipe S respectively
4Drain electrode and electrical network u
GThe other end.
In the present embodiment, input filter capacitor C
In, decoupling capacitance C
DAnd output filter capacitor C
OCan adopt non-electrolytic capacitors such as membrane capacitance, the first former limit switching tube S
P1, the second former limit switching tube S
P2, the first boosted switch pipe S
B1With the second boosted switch pipe S
B2Be the HF switch pipe, the actual switch frequency can adopt MOSFET when it is specifically implemented from changing between the 100kHz to 400kHz, the first inverse switch pipe S
1, the second inverse switch pipe S
2, the 3rd inverse switch pipe S
3And the 4th inverse switch pipe S
4Be the power frequency switching tube, the second boosted switch pipe S
B2Operating frequency be the twice power frequency because switching frequency is lower, can adopt MOSFET or thyristor when specifically implementing.
The photovoltaic combining inverter of active energy decoupling zero of the present invention organically combines the decoupling zero that realizes photovoltaic array power output and combining inverter power output with first anti exciting converter 10 and second anti exciting converter 20 with pressure regulation converter 30.For solar photovoltaic interconnected inverter proposed by the invention, its grid side voltage and current is respectively:
u
G＝U
Gsin(ωt) (1)
i
o＝I
Gsin(ωt) (2)
Wherein, u
GBe line voltage instantaneous value, U
GBe line voltage peak value, i
oBe output grid-connected current instantaneous value, I
GBe inverter output current peak value.Then the combining inverter power output is:
p
o＝I
GU
Gsin
2(ωt)＝P
osin
2(ωt) (3)
Therefore, the combining inverter power output is the pulsating quantity that frequency equals two times of line voltage frequencies, and photovoltaic array power output P
PVFor level and smooth direct current, according to energy balance relations, the photovoltaic array power output equals the mean value of power output in the combining inverter unit power cycle, that is:
(referring to Fig. 2).According to photovoltaic array power output P
PVWith combining inverter power output p
oInstantaneous relation, there are two kinds of operation modes in solar photovoltaic interconnected inverter:
Mode one: p
o≤ P
PV
Work as p
oSmaller or equal to P
PVThe time, first back exciting converter 10 and second back exciting converter, 20 co-operation, pressure regulation converter 30 is not worked, and the power output of first back exciting converter 10 arrives electrical network u through output filter circuit 40 and inverter circuit 50 with power transfer
GOn, also be the power output p of first back exciting converter 10
1Equal the power output p of solar photovoltaic interconnected inverter
o, the surplus power of photovoltaic array PV output is stored in decoupling capacitance C through second back exciting converter 20
DIn, decoupling capacitance C
DBe high-voltage capacitance, its voltage allows to arrive 0
Between change, the power output sum of first back exciting converter 10 and second back exciting converter 20 equals photovoltaic array PV power output P
PV, the equivalent electric circuit of this mode as shown in Figure 3.
Mode two: p
o＞P
PV
Work as p
oGreater than P
PVThe time, first back exciting converter 10 and booster converter 30 co-operation, second back exciting converter 20 is not worked, the second boosted switch pipe S of second back exciting converter 20
B2Be in conducting state always, under this mode, the power output p of first back exciting converter 10
1Equal the power output P of photovoltaic array PV
PV, first back exciting converter 10 arrives electrical network u through output filter circuit 40 and inverter circuit 50 with power transfer with the power output of pressure regulation converter 30
GOn, also be the power output p that first back exciting converter 10 and pressure regulation converter 30 power output sums equal solar photovoltaic interconnected inverter
o, the equivalent electric circuit under this mode as shown in Figure 4.Pressure regulation converter 30 output energy promptly are the energy that mode is stored on electric capacity for the moment, have only this part energy to participate in HF power conversion twice.
In cycle, the power output of photovoltaic combining inverter various piece as shown in Figure 2 at a line voltage.Can find that by top analysis solar photovoltaic interconnected inverter of the present invention is with photovoltaic array PV power output P
PVWith combining inverter power output p
oDifference transfer to decoupling capacitance C
DOn realized both power decoupled, and input filter capacitor C
InOnly play the effect of filtering high-frequency current component, therefore it goes without doing power decoupled electric capacity only need the non-electrolytic capacitor of low capacity to meet the demands.
Can also find by top analysis, secondary HF power conversion of the present invention partly is equivalent to the average power of second back exciting converter 20, be 0.318PPV, that is equivalent HF power conversion progression is 1.318, and the equivalent HF power conversion progression of tandem power decoupled is 2.
At the positive half cycle of line voltage, the first inverse switch pipe S of inverter circuit 50
1With the 4th inverse switch pipe S
4Be in conducting state always, the second inverse switch pipe S
2With the 3rd inverse switch pipe S
3Be in off state always; At the negative half period of line voltage, the first inverse switch pipe S
1With the 4th inverse switch pipe S
4Be in off state always, the second inverse switch pipe S
2With the 3rd inverse switch pipe S
3Be in conducting state always.
Solar photovoltaic interconnected inverter is when real work, adopt digital control processor to realize the control of combining inverter, realize combining inverter output current and line voltage same-phase by phase-locked loop, make the amplitude of grid-connected current change simultaneously according to sinusoidal rule.
As shown in Figure 6, identical with embodiment 1, the photovoltaic combining inverter of active energy decoupling zero of the present invention, it comprises first anti exciting converter 10, second anti exciting converter 20, pressure regulation converter 30, output filter circuit 40 and inverter circuit 50; The output voltage u of solar energy photovoltaic array PV
PVBy an output voltage u who is connected in parallel on photovoltaic array PV
PVOn input filter capacitor C
InBe connected with the input of first anti exciting converter 10 and the input of second anti exciting converter 20 respectively, the output of second anti exciting converter 20 is by a decoupling capacitance C who is connected in parallel on the output of second anti exciting converter 20
DBe connected with the input of pressure regulation converter 30, the output of first anti exciting converter 10 is connected to each other with the output of pressure regulation converter 30 and is connected with the input of output filter capacitor 40, and the output of output filter capacitor 40 is connected with inverter circuit 50.
In an embodiment, first anti exciting converter 10 comprises the first former limit switching tube S
P1, the first anti-violent change depressor T
1With the first secondary rectifier diode D
S1, the first anti-violent change depressor T
1Comprise former limit winding N
P1With secondary winding N
S1Second anti exciting converter 20 comprises the second former limit switching tube S
P2, the second anti-violent change depressor T
2With the second secondary rectifier diode D
S2, the second anti-violent change depressor T
2Comprise former limit winding N
P2With secondary winding N
S2 Pressure regulation converter 30 comprises boost inductance L
B, the first boosted switch pipe S
B1, the second boosted switch pipe S
B2And booster diode D
B Output filter circuit 40 comprises output filter capacitor C
OWith output inductor L
OInverter circuit 50 comprises the first inverse switch pipe S
1, the second inverse switch pipe S
2, the 3rd inverse switch pipe S
3And the 4th inverse switch pipe S
4
With respect to embodiment 1, the difference of embodiment 2 is the pressure regulation converter 30 inner first boosted switch pipe S
B1With the second boosted switch pipe S
B2The annexation difference.In the present embodiment, the first boosted switch pipe S
B1Drain electrode be connected in the second boosted switch pipe S respectively
B2Source electrode and booster diode D
BAnode, the first boosted switch pipe S
B1Source electrode be connected in the first anti-violent change depressor T of first anti exciting converter 10
1Secondary winding N
S1End of the same name, the second anti-violent change depressor T of second anti exciting converter 20
2Secondary winding N
S2End of the same name, decoupling capacitance C
DThe other end, the output filter capacitor C of output filter circuit 40
OThe other end, the second inverse switch pipe S of inverter circuit 50
2Source electrode and the 4th inverse switch pipe S
4Source electrode, the second boosted switch pipe S
B2Drain electrode and boost inductance L
BThe other end link to each other.
With respect to embodiment 1, embodiment 2 is at the first boosted switch pipe S
B1The principle that can utilize charge pump when opening is to the second boosted switch pipe S
B2Driving power charge, therefore, help the realization of switching tube drive circuit.
Embodiment 3
As shown in Figure 7, identical with embodiment 1, the photovoltaic combining inverter of active energy decoupling zero of the present invention, it comprises first anti exciting converter 10, second anti exciting converter 20, pressure regulation converter 30, output filter circuit 40 and inverter circuit 50; The output voltage u of solar energy photovoltaic array PV
PVBy an output voltage u who is connected in parallel on photovoltaic array PV
PVOn input filter capacitor C
InBe connected with the input of first anti exciting converter 10 and the input of second anti exciting converter 20 respectively, the output of second anti exciting converter 20 is by a decoupling capacitance C who is connected in parallel on the output of second anti exciting converter 20
DBe connected with the input of pressure regulation converter 30, the output of first anti exciting converter 10 is connected to each other with the output of pressure regulation converter 30 and is connected with the input of output filter capacitor 40, and the output of output filter capacitor 40 is connected with inverter circuit 50.
In an embodiment, first anti exciting converter 10 comprises the first former limit switching tube S
P1, the first anti-violent change depressor T
1With the first secondary rectifier diode D
S1, the first anti-violent change depressor T
1Comprise former limit winding N
P1With secondary winding N
S1Second anti exciting converter 20 comprises the second former limit switching tube S
P2, the second anti-violent change depressor T
2With the second secondary rectifier diode D
S2, the second anti-violent change depressor T
2Comprise former limit winding N
P2With secondary winding N
S2 Output filter circuit 40 comprises output filter capacitor C
OWith output inductor L
OInverter circuit 50 comprises the first inverse switch pipe S
1, the second inverse switch pipe S
2, the 3rd inverse switch pipe S
3And the 4th inverse switch pipe S
4
Be that with the difference of embodiment 1 in the present embodiment, pressure regulation converter 30 is for comprising buck inductor L
B, step-down switching pipe S
BAnd buck diode D
BReduction voltage circuit, the enforcement prerequisite of this embodiment is decoupling capacitance C
DVoltage be higher than line voltage all the time, with respect to embodiment 1 and embodiment 2, embodiment 2 needed decoupling capacitance capacity are littler, the switching tube quantity that needs to use has also reduced one, therefore cost is lower, and the annexation of pressure regulation converter 30 parts is described below among the embodiment 3: step-down switching pipe S
BDrain electrode be connected in the second secondary rectifier diode D of second anti exciting converter 20
S2Negative electrode and decoupling zero capacitor C
DAn end, step-down switching pipe S
BSource electrode be connected in buck diode D respectively
BNegative electrode and buck inductor L
BAn end, buck inductor L
BThe other end be connected in the output filter capacitor C of output filter circuit 40 respectively
OAn end and output inductor L
OAn end, buck diode D
BAnode be connected in the first anti-violent change depressor T of first anti exciting converter 10
1Secondary winding N
S1End of the same name, the second anti-violent change depressor T of second anti exciting converter 20
2Secondary winding N
S2End of the same name, decoupling capacitance C
DThe other end, the output filter capacitor C of output filter circuit 40
OThe other end, the second inverse switch pipe S of inverter circuit 50
2Source electrode and the 4th inverse switch pipe S
4Source electrode.
As shown in Figure 5, solar photovoltaic interconnected inverter is at the groundwork waveform of a line voltage in the cycle.
With the line voltage angular measure, under the steady operation situation, mode one is 45 degree and 135 degree (225 degree and 315 degree) with the intersection point of mode two.In embodiment 1 and embodiment 2, owing to used booster circuit, decoupling capacitance C
DOn voltage must be not more than 0.707 times of electrical network crest voltage.And in embodiment 2, owing to reduction voltage circuit, decoupling capacitance C have been used
DOn voltage must be greater than the electrical network crest voltage.
More than show and described basic principle of the present invention and principal character and advantage of the present invention.The technical staff of the industry should understand; the present invention is not restricted to the described embodiments; that describes in the foregoing description and the specification just illustrates principle of the present invention; without departing from the spirit and scope of the present invention; the present invention also has various changes and modifications; these changes and improvements all fall in the claimed scope of the invention, and the claimed scope of the present invention is defined by appending claims and equivalent thereof.
Claims (12)
1. the photovoltaic combining inverter of an active energy decoupling zero is characterized in that, it comprises first anti exciting converter, second anti exciting converter, pressure regulation converter, output filter circuit and inverter circuit; The output voltage of solar energy photovoltaic array is connected with the input of first anti exciting converter and the input of second anti exciting converter respectively by an input filter capacitor that is connected in parallel on the output voltage of photovoltaic array, the output of described second anti exciting converter is connected with the input of described pressure regulation converter by a decoupling capacitance that is connected in parallel on the output of described second anti exciting converter, the output of described first anti exciting converter is connected to each other with the output of described pressure regulation converter and is connected with the input of described output filter capacitor, and the output of described output filter capacitor is connected with described inverter circuit.
2. photovoltaic combining inverter according to claim 1 is characterized in that, described first anti exciting converter comprises the first former limit switching tube, the first anti-violent change depressor and the first secondary rectifier diode; The end of the same name of the former limit winding of the described first anti-violent change depressor is connected with the positive ends of the output voltage of solar energy photovoltaic array and an end of described input filter capacitor, the non-same polarity of the former limit winding of the described first anti-violent change depressor is connected with the drain electrode of the described first former limit switching tube, the source electrode of the described first former limit switching tube and described second anti exciting converter, the negative polarity end of the output voltage of the other end of described input filter capacitor and solar energy photovoltaic array connects, the non-same polarity of the secondary winding of the described first anti-violent change depressor is connected with the anode of the described first secondary rectifier diode, the negative electrode of the described first secondary rectifier diode is connected to the input of described output filter circuit, and the end of the same name of the secondary winding of the described first anti-violent change depressor is connected with described inverter circuit and ground connection with described output filter circuit successively.
3. photovoltaic combining inverter according to claim 1 is characterized in that, described second anti exciting converter comprises the second former limit switching tube, the second anti-violent change depressor and the second secondary rectifier diode; The end of the same name of the former limit winding of the described second anti-violent change depressor is connected with the positive ends of the output voltage of solar energy photovoltaic array and an end of described input filter capacitor, the non-same polarity of the former limit winding of the described second anti-violent change depressor is connected with the drain electrode of the described second former limit switching tube, the source electrode of the described second former limit switching tube and described first anti exciting converter, the negative polarity end of the output voltage of the other end of described input filter capacitor and solar energy photovoltaic array connects, the non-same polarity of the secondary winding of the described second anti-violent change depressor is connected with the anode of the described second secondary rectifier diode, the negative electrode of the described second secondary rectifier diode and an end of described decoupling capacitance are connected and are connected to the input of described pressure regulation converter, and the end of the same name of the secondary winding of the described second anti-violent change depressor and the other end of described decoupling capacitance are connected and are connected to the input of described pressure regulation converter.
4. photovoltaic combining inverter according to claim 1 is characterized in that described output filter circuit comprises output filter capacitor and output inductor; One end of described output filter capacitor is connected to each other with an end of described output inductor and is connected with the output of described first anti exciting converter and the output of second anti exciting converter respectively, the other end of described output filter capacitor is connected with described inverter circuit and ground connection with described first anti exciting converter respectively, and the other end of described output inductor is connected with the input of described inverter circuit.
5. photovoltaic combining inverter according to claim 1 is characterized in that, described inverter circuit comprises the first inverse switch pipe, the second inverse switch pipe, the 3rd inverse switch pipe and the 4th inverse switch pipe; The drain electrode of the described first inverse switch pipe is connected to each other with the drain electrode of described the 3rd inverse switch pipe and is connected with the output of described output filter circuit, the source electrode of the described first inverse switch pipe and the drain electrode of the described second inverse switch pipe are connected and connect an end of electrical network, the source electrode of described the 3rd inverse switch pipe and the drain electrode of described the 4th inverse switch pipe are connected and connect the other end of electrical network, and the source electrode of the described second inverse switch pipe is connected with the source electrode of described the 4th inverse switch pipe and ground connection.
6. photovoltaic combining inverter according to claim 1 is characterized in that, described pressure regulation converter comprises boost inductance, the first boosted switch pipe, second boosted switch pipe and the booster diode; One end of described boost inductance is connected with an end of the output of described second anti exciting converter and described decoupling capacitance, the other end of described boost inductance is connected with the drain electrode of the described first boosted switch pipe and the drain electrode of the described second boosted switch pipe respectively, the source electrode of the described first boosted switch pipe connects described first anti exciting converter respectively, the other end of described second anti exciting converter and described decoupling capacitance and ground connection, the source electrode of the described second boosted switch pipe is connected with the anode of described booster diode, and the negative electrode of described booster diode is connected with described output filter circuit with described first anti exciting converter respectively.
7. photovoltaic combining inverter according to claim 1 is characterized in that, described pressure regulation converter comprises boost inductance, the first boosted switch pipe, second boosted switch pipe and the booster diode; One end of described boost inductance is connected with an end of the output of described second anti exciting converter and described decoupling capacitance, the other end of described boost inductance is connected with the drain electrode of the described second boosted switch pipe, the source electrode of the described second boosted switch pipe is connected with the drain electrode of the described first boosted switch pipe and the anode of described booster diode respectively, the negative electrode of described booster diode is connected with described output filter circuit with described first anti exciting converter respectively, and the source electrode of the described first boosted switch pipe connects described first anti exciting converter respectively, the other end of described second anti exciting converter and described decoupling capacitance and ground connection.
8. photovoltaic combining inverter according to claim 1 is characterized in that, described pressure regulation converter comprises buck inductor, step-down switching pipe and buck diode; The drain electrode of described step-down switching pipe is connected with the output of described second anti exciting converter and an end of described decoupling capacitance, the source electrode of described step-down switching pipe connects an end of described buck inductor and the negative electrode of described buck diode respectively, the anode of described buck diode connects the other end and the ground connection of described first anti exciting converter, described second anti exciting converter and described decoupling capacitance respectively, and the other end of described buck inductor is connected with described output filter circuit with described first anti exciting converter respectively.
9. according to claim 1 or 4 described photovoltaic combining inverters, it is characterized in that described input filter capacitor, decoupling capacitance and output filter capacitor are non-electrolytic capacitor.
10. according to the arbitrary described photovoltaic combining inverter of claim 2 to 8, it is characterized in that, the described first former limit switching tube, the second former limit switching tube, the first boosted switch pipe and the second boosted switch pipe are the HF switch pipe, the described first inverse switch pipe, the second inverse switch pipe, the 3rd inverse switch pipe and the 4th inverse switch pipe are the power frequency switching tube, and the operating frequency of the described second boosted switch pipe is the twice power frequency.
11. photovoltaic combining inverter according to claim 1, it is characterized in that, when the power output of photovoltaic combining inverter is not more than the power output of solar energy photovoltaic array, first back exciting converter and the second back exciting converter co-operation, the pressure regulation converter is not worked, the power output of first back exciting converter through output filter circuit and inverter circuit with power transfer to electrical network, also promptly the power output of first back exciting converter equals the power output of photovoltaic combining inverter, the surplus power of solar energy photovoltaic array output is stored in the decoupling capacitance through second back exciting converter, and the power output sum of first back exciting converter and second back exciting converter equals the power output of solar energy photovoltaic array.
12. photovoltaic combining inverter according to claim 1, it is characterized in that, when the power output of photovoltaic combining inverter during greater than the power output of solar energy photovoltaic array, first back exciting converter and pressure regulation converter co-operation, second back exciting converter is not worked, the second boosted switch pipe is in conducting state always, the power output of first back exciting converter equals the power output of solar energy photovoltaic array, the power output of first back exciting converter and pressure regulation converter through output filter circuit and inverter circuit with power transfer to electrical network, also promptly first back exciting converter and pressure regulation converter power output sum equal the power output of solar photovoltaic interconnected inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101731311A CN101841252B (en) | 2010-05-11 | 2010-05-11 | Photovoltaic grid-connected inverter for active energy decoupling |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101731311A CN101841252B (en) | 2010-05-11 | 2010-05-11 | Photovoltaic grid-connected inverter for active energy decoupling |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN101841252A true CN101841252A (en) | 2010-09-22 |
| CN101841252B CN101841252B (en) | 2012-11-07 |
Family
ID=42744436
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101731311A Expired - Fee Related CN101841252B (en) | 2010-05-11 | 2010-05-11 | Photovoltaic grid-connected inverter for active energy decoupling |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN101841252B (en) |
Cited By (23)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102118116A (en) * | 2010-11-25 | 2011-07-06 | 浙江昱能光伏科技集成有限公司 | Solar photovoltaic synchronization group micro-inverter and direct current and alternating current inverting methods |
| CN102437759A (en) * | 2012-01-18 | 2012-05-02 | 朱秋花 | High-efficiency grid inverter circuit |
| CN102522766A (en) * | 2011-11-04 | 2012-06-27 | 浙江大学 | Flyback type miniature photovoltaic grid connected inverter with power decoupling circuit and control method thereof |
| CN102545676A (en) * | 2012-01-18 | 2012-07-04 | 苏州华领太阳能电力技术有限公司 | Energy accumulating circuit for photovoltaic grid-connected inverter and control method thereof |
| CN102570891A (en) * | 2012-01-16 | 2012-07-11 | 浙江大学 | Flyback photovoltaic grid-connected inverter adopting interleaving parallel-connection active clamping technology |
| CN102624288A (en) * | 2012-04-09 | 2012-08-01 | 友达光电股份有限公司 | AC (Alternating Current) solar energy module and electrical energy dispatching method |
| CN102624264A (en) * | 2011-01-30 | 2012-08-01 | 上海康威特吉能源技术有限公司 | Multiple-input fly-back photovoltaic grid-connected inverter |
| CN102638059A (en) * | 2012-05-07 | 2012-08-15 | 安徽工业大学 | Single-phase photovoltaic grid-connected generating system power decoupling circuit and control method thereof |
| CN103378761A (en) * | 2012-04-24 | 2013-10-30 | 丰郅(上海)新能源科技有限公司 | Three-stage topology photovoltaic inverter |
| CN103427656A (en) * | 2013-07-11 | 2013-12-04 | 江苏大学 | Staggered parallel flyback LED driving power supply and PFM (pulse width modulation) control circuit thereof |
| CN103580485A (en) * | 2012-08-10 | 2014-02-12 | 盈威力新能源科技(上海)有限公司 | Direct-current and direct-current converter with multiple independent input ends and single output end |
| CN103618470A (en) * | 2013-12-03 | 2014-03-05 | 东南大学 | Photovoltaic grid-connection micro inverter and power decoupling control method |
| CN103618471A (en) * | 2013-11-25 | 2014-03-05 | 国网河南省电力公司南阳供电公司 | Single-phase photovoltaic grid-connected inverter |
| CN103929078A (en) * | 2014-04-15 | 2014-07-16 | 江苏大学 | Double-bus normal-shock type micro-inverter front-end circuit and control method thereof |
| CN103986185A (en) * | 2014-05-06 | 2014-08-13 | 特变电工新疆新能源股份有限公司 | Photovoltaic grid-connected inverter with active power decoupling function |
| CN104104256A (en) * | 2014-06-24 | 2014-10-15 | 广东易事特电源股份有限公司 | Single-phase grid-connected inverter with active power decoupling function, and power decoupling method |
| CN105900324A (en) * | 2013-11-07 | 2016-08-24 | 伊索特拉有限公司 | Power distribution |
| CN106849708A (en) * | 2017-02-10 | 2017-06-13 | 中南大学 | A kind of PFC fairings |
| CN107947596A (en) * | 2017-12-25 | 2018-04-20 | 国网辽宁省电力有限公司沈阳供电公司 | A kind of power distribution network distributed flexible voltage control system |
| CN109120156A (en) * | 2017-06-23 | 2019-01-01 | 中兴通讯股份有限公司 | A kind of isolation BUCK-BOOST circuit and its control method |
| CN110336469A (en) * | 2019-07-09 | 2019-10-15 | 奇瑞新能源汽车股份有限公司 | DC converter, charge discharging resisting control method, power circuit, vehicle |
| CN113437762A (en) * | 2021-07-30 | 2021-09-24 | 易事特集团股份有限公司 | Photovoltaic inverter power system |
| CN115995986A (en) * | 2023-03-24 | 2023-04-21 | 安徽微伏特电源科技有限公司 | Series-parallel flyback boost circuit topology with triangular structure |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11136941A (en) * | 1997-10-27 | 1999-05-21 | Masashi Mukogawa | Voltage converter |
| JP2002101659A (en) * | 2000-09-22 | 2002-04-05 | Nichicon Corp | Fly-back converter |
| TW200816612A (en) * | 2006-09-21 | 2008-04-01 | Atomic Energy Council | AC-DC power transformer with high power factor |
| EP2043246A2 (en) * | 2007-09-28 | 2009-04-01 | Enphase Energy, Inc. | Method and apparatus for providing power conversion using an interleaved flyback converter with automatic balancing |
| CN101635530A (en) * | 2009-08-28 | 2010-01-27 | 南京航空航天大学 | Single-stage forward type high-frequency linked inverter |
-
2010
- 2010-05-11 CN CN2010101731311A patent/CN101841252B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH11136941A (en) * | 1997-10-27 | 1999-05-21 | Masashi Mukogawa | Voltage converter |
| JP2002101659A (en) * | 2000-09-22 | 2002-04-05 | Nichicon Corp | Fly-back converter |
| TW200816612A (en) * | 2006-09-21 | 2008-04-01 | Atomic Energy Council | AC-DC power transformer with high power factor |
| EP2043246A2 (en) * | 2007-09-28 | 2009-04-01 | Enphase Energy, Inc. | Method and apparatus for providing power conversion using an interleaved flyback converter with automatic balancing |
| CN101635530A (en) * | 2009-08-28 | 2010-01-27 | 南京航空航天大学 | Single-stage forward type high-frequency linked inverter |
Cited By (36)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102118116B (en) * | 2010-11-25 | 2013-02-13 | 浙江昱能光伏科技集成有限公司 | Solar photovoltaic synchronization group micro-inverter and direct current and alternating current inverting methods |
| CN102118116A (en) * | 2010-11-25 | 2011-07-06 | 浙江昱能光伏科技集成有限公司 | Solar photovoltaic synchronization group micro-inverter and direct current and alternating current inverting methods |
| CN102624264A (en) * | 2011-01-30 | 2012-08-01 | 上海康威特吉能源技术有限公司 | Multiple-input fly-back photovoltaic grid-connected inverter |
| CN102522766A (en) * | 2011-11-04 | 2012-06-27 | 浙江大学 | Flyback type miniature photovoltaic grid connected inverter with power decoupling circuit and control method thereof |
| CN102522766B (en) * | 2011-11-04 | 2014-12-24 | 浙江昱能科技有限公司 | Flyback type miniature photovoltaic grid connected inverter with power decoupling circuit and control method thereof |
| CN102570891B (en) * | 2012-01-16 | 2014-08-13 | 浙江昱能光伏科技集成有限公司 | Flyback photovoltaic grid-connected inverter adopting interleaving parallel-connection active clamping technology |
| CN102570891A (en) * | 2012-01-16 | 2012-07-11 | 浙江大学 | Flyback photovoltaic grid-connected inverter adopting interleaving parallel-connection active clamping technology |
| CN102437759A (en) * | 2012-01-18 | 2012-05-02 | 朱秋花 | High-efficiency grid inverter circuit |
| CN102545676A (en) * | 2012-01-18 | 2012-07-04 | 苏州华领太阳能电力技术有限公司 | Energy accumulating circuit for photovoltaic grid-connected inverter and control method thereof |
| CN102437759B (en) * | 2012-01-18 | 2016-01-06 | 朱秋花 | A kind of high efficiency grid-connected inverter circuit |
| CN102545676B (en) * | 2012-01-18 | 2014-09-17 | 苏州华领太阳能电力技术有限公司 | Energy accumulating circuit for photovoltaic grid-connected inverter |
| CN102624288A (en) * | 2012-04-09 | 2012-08-01 | 友达光电股份有限公司 | AC (Alternating Current) solar energy module and electrical energy dispatching method |
| CN103378761A (en) * | 2012-04-24 | 2013-10-30 | 丰郅(上海)新能源科技有限公司 | Three-stage topology photovoltaic inverter |
| CN102638059A (en) * | 2012-05-07 | 2012-08-15 | 安徽工业大学 | Single-phase photovoltaic grid-connected generating system power decoupling circuit and control method thereof |
| CN102638059B (en) * | 2012-05-07 | 2014-06-04 | 安徽工业大学 | Single-phase photovoltaic grid-connected generating system power decoupling circuit and control method thereof |
| CN103580485A (en) * | 2012-08-10 | 2014-02-12 | 盈威力新能源科技(上海)有限公司 | Direct-current and direct-current converter with multiple independent input ends and single output end |
| CN103427656A (en) * | 2013-07-11 | 2013-12-04 | 江苏大学 | Staggered parallel flyback LED driving power supply and PFM (pulse width modulation) control circuit thereof |
| CN103427656B (en) * | 2013-07-11 | 2015-09-02 | 江苏大学 | A kind of crisscross parallel inverse-excitation type LED drive power and PFM control circuit thereof |
| CN105900324A (en) * | 2013-11-07 | 2016-08-24 | 伊索特拉有限公司 | Power distribution |
| CN103618471A (en) * | 2013-11-25 | 2014-03-05 | 国网河南省电力公司南阳供电公司 | Single-phase photovoltaic grid-connected inverter |
| CN103618470A (en) * | 2013-12-03 | 2014-03-05 | 东南大学 | Photovoltaic grid-connection micro inverter and power decoupling control method |
| CN103618470B (en) * | 2013-12-03 | 2015-10-07 | 东南大学 | A kind of power decoupled control method based on grid-connected micro-inverter |
| CN103929078A (en) * | 2014-04-15 | 2014-07-16 | 江苏大学 | Double-bus normal-shock type micro-inverter front-end circuit and control method thereof |
| CN103929078B (en) * | 2014-04-15 | 2016-05-25 | 江苏大学 | A kind of double-bus normal shock decline inverter front-end circuit and control method thereof |
| CN103986185A (en) * | 2014-05-06 | 2014-08-13 | 特变电工新疆新能源股份有限公司 | Photovoltaic grid-connected inverter with active power decoupling function |
| CN104104256B (en) * | 2014-06-24 | 2016-09-07 | 广东易事特电源股份有限公司 | There is single-phase grid-connected inverter and the power decoupled method of active power decoupling function |
| CN104104256A (en) * | 2014-06-24 | 2014-10-15 | 广东易事特电源股份有限公司 | Single-phase grid-connected inverter with active power decoupling function, and power decoupling method |
| CN106849708A (en) * | 2017-02-10 | 2017-06-13 | 中南大学 | A kind of PFC fairings |
| CN106849708B (en) * | 2017-02-10 | 2019-07-02 | 中南大学 | A kind of PFC fairing |
| CN109120156A (en) * | 2017-06-23 | 2019-01-01 | 中兴通讯股份有限公司 | A kind of isolation BUCK-BOOST circuit and its control method |
| CN107947596A (en) * | 2017-12-25 | 2018-04-20 | 国网辽宁省电力有限公司沈阳供电公司 | A kind of power distribution network distributed flexible voltage control system |
| CN107947596B (en) * | 2017-12-25 | 2020-10-27 | 国网辽宁省电力有限公司沈阳供电公司 | Distributed flexible voltage regulation control system for power distribution network |
| CN110336469A (en) * | 2019-07-09 | 2019-10-15 | 奇瑞新能源汽车股份有限公司 | DC converter, charge discharging resisting control method, power circuit, vehicle |
| CN110336469B (en) * | 2019-07-09 | 2021-06-29 | 奇瑞新能源汽车股份有限公司 | Direct current converter, charge discharge control method, power supply circuit and vehicle |
| CN113437762A (en) * | 2021-07-30 | 2021-09-24 | 易事特集团股份有限公司 | Photovoltaic inverter power system |
| CN115995986A (en) * | 2023-03-24 | 2023-04-21 | 安徽微伏特电源科技有限公司 | Series-parallel flyback boost circuit topology with triangular structure |
Also Published As
| Publication number | Publication date |
|---|---|
| CN101841252B (en) | 2012-11-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101841252B (en) | Photovoltaic grid-connected inverter for active energy decoupling | |
| CN100433525C (en) | Soft switch back exciting converter used for solar energy photovoltaic generation incorporate in power network | |
| CN102522766B (en) | Flyback type miniature photovoltaic grid connected inverter with power decoupling circuit and control method thereof | |
| CN103618470B (en) | A kind of power decoupled control method based on grid-connected micro-inverter | |
| CN106059306B (en) | A kind of multiple-unit diode capacitance network high-gain full-bridge isolated DC converter | |
| CN103023362A (en) | Bridgeless inverter circuit and solar bridgeless inverter | |
| CN102255332A (en) | On-grid inverter | |
| CN203423631U (en) | Solar energy no-bridge inverter comprising high boosted circuit | |
| TW201911719A (en) | Interleaved high-step-up zero-voltage switching dc-dc converter | |
| CN102447404A (en) | Three-phase alternating-current (AC)-direct-current (DC) full-bridge high-frequency converter | |
| CN103326606A (en) | One-phase five-level inverter | |
| CN203675000U (en) | Photovoltaic grid-connection micro inverter | |
| CN103986185A (en) | Photovoltaic grid-connected inverter with active power decoupling function | |
| CN108123633B (en) | A kind of high efficiency photovoltaic combining inverter of no electrolytic capacitor Ripple Suppression | |
| CN102857142A (en) | Multi-path MPPT (maximum power point tracking) circuit and solar photovoltaic inverter | |
| CN105751915A (en) | Photovoltaic energy storage direct current quick charging pile | |
| CN202840997U (en) | Mini-type photovoltaic inverter with composite three-level structure and based on DSP | |
| CN110061523B (en) | Multifunctional single-phase grid-connected inversion system and method with novel topological structure | |
| CN203691279U (en) | Topologically structured circuit of mini photovoltaic inverter | |
| CN202168006U (en) | Multi-path MPPT circuit and solar photovoltaic inverter | |
| CN205142045U (en) | Photovoltaic transfer circuit and photovoltaic power equipment | |
| CN210578299U (en) | Photovoltaic inverter based on gallium nitride device | |
| CN203219215U (en) | Solar energy system comprising power optimizing apparatus | |
| CN108111038B (en) | A kind of miniature photovoltaic grid-connected inverter based on circuit of reversed excitation and active Ripple Suppression | |
| CN202444421U (en) | Boost transformation circuit and solar energy inverter |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 201203 ROOM 408, NO. 84, LANE 887, ZUCHONGZHI ROAD, PUDONG NEW DISTRICT, SHANGHAI TO: 201203 ROOM 501, BUILDING 84, LANE 887, ZUCHONGZHI ROAD, ZHANGJIANG HIGH TECHNOLOGY PARK, PUDONG NEW DISTRICT, SHANGHAI |
|
| TA01 | Transfer of patent application right |
Effective date of registration: 20110317 Address after: Zuchongzhi road in Pudong New Area Zhangjiang hi tech park Shanghai 201203 Lane 887 Building No. 84 Room 501 Applicant after: INVOLAR Corporation Ltd. Address before: 201203 Shanghai city Pudong New Area road 887 Lane 84 Zuchongzhi Room 408 No. Applicant before: Yingweili New Energy Technology (Shanghai) Co., Ltd. |
|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| DD01 | Delivery of document by public notice |
Addressee: INVOLAR Corporation Ltd. Document name: Notification to Pay the Fees |
|
| DD01 | Delivery of document by public notice |
Addressee: INVOLAR Corporation Ltd. Document name: Notification to Pay the Fees |
|
| DD01 | Delivery of document by public notice | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20121107 Termination date: 20180511 |