CN202004681U - Topological structure of photovoltaic grid-connected inverter - Google Patents
Topological structure of photovoltaic grid-connected inverter Download PDFInfo
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- CN202004681U CN202004681U CN 201120091595 CN201120091595U CN202004681U CN 202004681 U CN202004681 U CN 202004681U CN 201120091595 CN201120091595 CN 201120091595 CN 201120091595 U CN201120091595 U CN 201120091595U CN 202004681 U CN202004681 U CN 202004681U
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- power tube
- diode
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- topological structure
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
- H02M7/5388—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with asymmetrical configuration of switches
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The utility model relates to the field of photoelectricity, in particular to a topological structure of a photovoltaic grid-connected inverter, which comprises an electrolytic capacitor, a power tube, a filter inductor and a freewheel diode. Compared with the prior art, the six-tube full-bridge topological structure is adopted to improve the utilization ratio of a solar battery panel and the conversion efficiency of a system, reduce the occupation ratio of output voltage ultraharmonics, decrease the total harmonic distortion of an output current, reduce the electromagnetic interference, diminish the pollution on a power grid, lower the cost and increase the safety of the photovoltaic system.
Description
Technical field
The utility model relates to photoelectric field, specifically a kind of topological structure of photovoltaic combining inverter.
Background technology
As the regenerative resource of cleaning, solar energy generation technology has obtained using widely.Wherein, photovoltaic combining inverter becomes the core part in large-sized photovoltaic power station.The effect of photovoltaic combining inverter is to convert direct voltage in the solar energy photovoltaic array to suitable AC sinusoidal voltage, and its voltage magnitude and frequency meet various countries' electrical network requirement.The Key Performance Indicator of photovoltaic combining inverter comprises conversion efficiency, harmonic content, Electro Magnetic Compatibility etc.Along with the development of photovoltaic combining inverter, people also have more and more higher requirement to aspects such as the quality of power supply of photovoltaic combining inverter, security performance, electromagnetic compatibilities.
At present, widely used photovoltaic combining inverter topology mainly is single-phase slab bridge, single-phase full bridge structure, and the conversion efficiency of these two kinds of circuit structures is not high, and thermal losses is too much, and the cost that causes dispelling the heat is too high, is unfavorable for the miniaturization and the cost degradation of photovoltaic combining inverter.A lot of producers adopt new-type elements such as efficient power, silicon carbide diode raising the efficiency, but the raising of efficient also is accompanied by the increase of cost.
In order to obtain maximal input, realize the maximum efficient of following the trail of, circuit must be regulated input voltage automatically according to different sunlight conditions, pass through soft switch technique simultaneously, reduced the switching loss of booster circuit, reduce electromagnetic interference, improved conversion efficiency, thereby improved the efficient of whole photovoltaic combining inverter.The output BUS terminal voltage of booster circuit the sinusoidal ac of dc inverter for being incorporated into the power networks, requires loss low as far as possible again by a kind of high efficiency topological structure in the transfer process.Therefore, designing a kind of satisfactory topological structure, is vital to raising the efficiency.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, and the topological structure of a kind of high efficiency, low-loss photovoltaic combining inverter is provided.
In order to achieve the above object, the utility model comprises electrochemical capacitor, power tube, filter inductance and fly-wheel diode, it is characterized in that: the positive pole of BUS end respectively with the end of electrochemical capacitor C, the drain electrode of power tube Q1, the drain electrode of power tube Q4 connects, live wire L is after passing through filter inductance L1, respectively with the source electrode of power tube Q1, the collector electrode of power tube Q2, the negative electrode of diode D1 connects, zero line N is after passing through filter inductance L2, respectively with the source electrode of power tube Q4, the collector electrode of power tube Q5, the negative electrode of diode D2 connects, the emitter of power tube Q2 respectively with the drain electrode of power tube Q3, the anode of diode D2 connects, the emitter of power tube Q5 respectively with the drain electrode of power tube Q6, the anode of diode D1 connects, the source electrode of the other end of electrochemical capacitor C and power tube Q3, after the source electrode of power tube Q6 connects, be connected with the negative pole of BUS end.
Described power tube Q2 and power tube Q5 adopt insulated gate bipolar transistor.
Described power tube Q1, power tube Q3, power tube Q4 and power tube Q6 adopt metal oxide semiconductcor field effect transistor.
The utility model is compared with prior art, adopt six pipe full-bridge topologies, the utilance of solar panel and the conversion efficiency of system have been improved, reduced the occupancy volume of output voltage high order harmonic component, reduced total harmonic distortion amount of output current, reduced electromagnetic interference, reduced pollution electrical network, reduce cost, increased the fail safe of photovoltaic system.
Description of drawings
Fig. 1 is a circuit connection diagram of the present utility model.
Fig. 2 is operating state 1 schematic diagram of the present utility model.
Fig. 3 is operating state 2 schematic diagrames of the present utility model.
Fig. 4 is operating state 3 schematic diagrames of the present utility model.
Fig. 5 is operating state 4 schematic diagrames of the present utility model.
Embodiment
Now in conjunction with the accompanying drawings the utility model is described further.
Referring to Fig. 1, the utility model comprises electrochemical capacitor, power tube, filter inductance and fly-wheel diode.Power tube Q2 and power tube Q5 adopt insulated gate bipolar transistor, and power tube Q1, power tube Q3, power tube Q4 and power tube Q6 adopt metal oxide semiconductcor field effect transistor.The positive pole of BUS end respectively with the end of electrochemical capacitor C, the drain electrode of power tube Q1, the drain electrode of power tube Q4 connects, live wire L is after passing through filter inductance L1, respectively with the source electrode of power tube Q1, the collector electrode of power tube Q2, the negative electrode of diode D1 connects, zero line N is after passing through filter inductance L2, respectively with the source electrode of power tube Q4, the collector electrode of power tube Q5, the negative electrode of diode D2 connects, the emitter of power tube Q2 respectively with the drain electrode of power tube Q3, the anode of diode D2 connects, the emitter of power tube Q5 respectively with the drain electrode of power tube Q6, the anode of diode D1 connects, the source electrode of the other end of electrochemical capacitor C and power tube Q3, after the source electrode of power tube Q6 connects, be connected with the negative pole of BUS end.
The utility model is compared with traditional single-phase full bridge, and six pipe full-bridge topologies have increased by two insulated gate bipolar transistors: power tube Q2 and power tube Q5 have increased sustained diode 1 and sustained diode 2.
The utility model is when work, and four metal oxide semiconductcor field effect transistors originally: power tube Q1, power tube Q3, power tube Q4 and power tube Q6 still are operated under the high frequency of 20kHz, to reduce the volume cost of filter inductance.Newly-increased power tube Q2 and power tube Q5 are operated under the power frequency of 50Hz, to reduce switching loss and electromagnetic interference.The driving pulse of power tube Q1 and power tube Q6 is synchronous, and the driving pulse of power tube Q3 and power tube Q4 is synchronous, and two group pulse antiphases, has safe dead band.
Referring to Fig. 2, in working order in 1, in the 20mS, power tube Q5 conducting always, power tube Q1 and power tube Q6 conducting, power tube Q2, power tube Q3 and power tube Q4 turn-off, and sustained diode 1 and sustained diode 2 are turn-offed.
Referring to Fig. 3, in working order in 2, power tube Q5 conducting, power tube Q1 and power tube Q6 turn-off, and power tube Q2, power tube Q3 and power tube Q4 turn-off, and sustained diode 2 is turn-offed, and sustained diode 1 conducting is for electric current provides continuous current circuit.
Referring to Fig. 4, in working order in 3, in the 20mS, power tube Q2 conducting always, power tube Q3 and power tube Q4 conducting, power tube Q2, power tube Q3 and power tube Q4 turn-off, and sustained diode 1 and sustained diode 2 are turn-offed.
Referring to Fig. 5, in working order in 4, power tube Q2 conducting, power tube Q3 and Q4 turn-off, and power tube Q2, power tube Q3 and power tube Q4 turn-off, and sustained diode 1 is turn-offed, and sustained diode 2 conductings are for electric current provides continuous current circuit.
Claims (3)
1. the topological structure of a photovoltaic combining inverter, comprise electrochemical capacitor, power tube, filter inductance and diode, it is characterized in that: the positive pole of BUS end respectively with the end of electrochemical capacitor C, the drain electrode of power tube Q1, the drain electrode of power tube Q4 connects, live wire L is after passing through filter inductance L1, respectively with the source electrode of power tube Q1, the collector electrode of power tube Q2, the negative electrode of diode D1 connects, zero line N is after passing through filter inductance L2, respectively with the source electrode of power tube Q4, the collector electrode of power tube Q5, the negative electrode of diode D2 connects, the emitter of power tube Q2 respectively with the drain electrode of power tube Q3, the anode of diode D2 connects, the emitter of power tube Q5 respectively with the drain electrode of power tube Q6, the anode of diode D1 connects, the source electrode of the other end of electrochemical capacitor C and power tube Q3, after the source electrode of power tube Q6 connects, be connected with the negative pole of BUS end.
2. the topological structure of a kind of photovoltaic combining inverter according to claim 1 is characterized in that: described power tube Q2 and power tube Q5 employing insulated gate bipolar transistor.
3. the topological structure of a kind of photovoltaic combining inverter according to claim 1 is characterized in that: described power tube Q1, power tube Q3, power tube Q4 and power tube Q6 employing metal oxide semiconductcor field effect transistor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120091595 CN202004681U (en) | 2011-03-31 | 2011-03-31 | Topological structure of photovoltaic grid-connected inverter |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120091595 CN202004681U (en) | 2011-03-31 | 2011-03-31 | Topological structure of photovoltaic grid-connected inverter |
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| CN202004681U true CN202004681U (en) | 2011-10-05 |
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| CN 201120091595 Expired - Fee Related CN202004681U (en) | 2011-03-31 | 2011-03-31 | Topological structure of photovoltaic grid-connected inverter |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102403921A (en) * | 2011-12-01 | 2012-04-04 | 合肥索维能源科技有限公司 | High-efficiency inverter with low output leakage current |
| CN102611344A (en) * | 2012-03-21 | 2012-07-25 | 苏州欧姆尼克新能源科技有限公司 | Inverter circuit device for photovoltaic electricity generation |
| WO2013082858A1 (en) * | 2011-12-09 | 2013-06-13 | 上海康威特吉能源技术有限公司 | Single-phase asymmetric full-bridge non-isolated photovoltaic grid-connected inverter |
| EP2669404A1 (en) * | 2012-05-31 | 2013-12-04 | Enersaver UG | Method and system for enhancing operation and efficiency of an AC circuit |
| US9148021B2 (en) | 2012-03-21 | 2015-09-29 | Industrial Technology Research Institute | Method for controlling alternating current output of photovoltaic device and alternating current photovoltaic device |
| CN105471296A (en) * | 2015-11-27 | 2016-04-06 | 深圳市美克能源科技股份有限公司 | Inverter circuit |
| CN116094295A (en) * | 2022-12-23 | 2023-05-09 | 浙江艾罗网络能源技术股份有限公司 | Inverter topology and inverter |
-
2011
- 2011-03-31 CN CN 201120091595 patent/CN202004681U/en not_active Expired - Fee Related
Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102403921A (en) * | 2011-12-01 | 2012-04-04 | 合肥索维能源科技有限公司 | High-efficiency inverter with low output leakage current |
| WO2013082858A1 (en) * | 2011-12-09 | 2013-06-13 | 上海康威特吉能源技术有限公司 | Single-phase asymmetric full-bridge non-isolated photovoltaic grid-connected inverter |
| CN102611344A (en) * | 2012-03-21 | 2012-07-25 | 苏州欧姆尼克新能源科技有限公司 | Inverter circuit device for photovoltaic electricity generation |
| US9148021B2 (en) | 2012-03-21 | 2015-09-29 | Industrial Technology Research Institute | Method for controlling alternating current output of photovoltaic device and alternating current photovoltaic device |
| EP2669404A1 (en) * | 2012-05-31 | 2013-12-04 | Enersaver UG | Method and system for enhancing operation and efficiency of an AC circuit |
| CN105471296A (en) * | 2015-11-27 | 2016-04-06 | 深圳市美克能源科技股份有限公司 | Inverter circuit |
| CN105471296B (en) * | 2015-11-27 | 2019-01-11 | 深圳市美克能源科技股份有限公司 | Inverter circuit |
| CN116094295A (en) * | 2022-12-23 | 2023-05-09 | 浙江艾罗网络能源技术股份有限公司 | Inverter topology and inverter |
| CN116094295B (en) * | 2022-12-23 | 2024-03-26 | 浙江艾罗网络能源技术股份有限公司 | Inverter topology and inverter |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20111005 Termination date: 20140331 |