CN202978744U - Two-stage single-phase photovoltaic grid-connected inverter topological structure - Google Patents
Two-stage single-phase photovoltaic grid-connected inverter topological structure Download PDFInfo
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- CN202978744U CN202978744U CN 201220615261 CN201220615261U CN202978744U CN 202978744 U CN202978744 U CN 202978744U CN 201220615261 CN201220615261 CN 201220615261 CN 201220615261 U CN201220615261 U CN 201220615261U CN 202978744 U CN202978744 U CN 202978744U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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Abstract
A two-stage single-phase photovoltaic grid-connected inverter topological structure comprises a forestage boost circuit and a rear-stage bridge type inverter circuit. The forestage boost circuit comprises a non-return diode, a boost inductor, a chopper switch tube, a freewheeling diode, a battery plate frontend capacitor. The rear-stage bridge type inverter circuit comprises a full-bridge inverter circuit, a filter inductor and a bus support capacitor. The cathode of the non-return diode is connected with one end of the boost inductor and one end of the battery plate frontend capacitor respectively; the other end of the boost inductor is connected with a collector electrode of the chopper switch tube and the anode of the freewheeling diode respectively; the cathode of the freewheeling diode is connected with the full-bridge inverter circuit; and two bridge arm immediate points of the full-bridge inverter circuit are connected with two ends of the filter inductor respectively. The structure is suitable for a single-phase photovoltaic inverter; the range of battery plate input voltage is wide; maximum power tracking is enabled; electric energy power factors of inversion are adjustable; and grid-connected power generation of a photovoltaic system can be realized effectively and stably.
Description
Technical field
The utility model relates to a kind of two-stage type single-phase photovoltaic grid-connected inverter topological structure, is specifically related to a kind of two-stage type single-phase photovoltaic grid-connected inverter topological structure that can generate electricity by way of merging two or more grid systems and can carry out maximum power tracing.
Background technology
Along with day by day improving of environmental protection requirement and increasingly exhausting of the disposable energy, developing clean free of contamination alternative energy has become the task of top priority.The energy that sun transmission per minute is equivalent to 31,500,000,000 barrels of oil is to the earth, and this quantity is sizable, is equivalent to the energy that consume global every day.Its potential resource has 120000TW, but the reality production of resources up to 600TW, so rationally utilize solar energy to be of great significance solving human future energy crisis tool, and photovoltaic generation is to utilize the most effective a kind of form of solar energy.Now need a kind of single-phase photovoltaic DC-to-AC converter that is applicable to, can generate electricity by way of merging two or more grid systems and also can carry out the two-stage type single-phase photovoltaic grid-connected inverter topological structure of maximum power tracing
The utility model content
A kind of two-stage type single-phase photovoltaic grid-connected inverter topological structure is disclosed based on above not enough the utility model, major function is that the lower output voltage that photovoltaic cell sends is upgraded to the quiescent potential that meets that inversion grid connection requires, stable DC bus-bar voltage and regulate solar cell, make it be operated in maximum power point corresponding position, complete the MPPT function.
For achieving the above object, the technical solution of the utility model is as follows: a kind of two-stage type single-phase photovoltaic grid-connected inverter topological structure, it comprises the booster circuit of prime and the bridge inverter main circuit of rear class, the booster circuit of prime comprises non-return diode, boost inductance, chopping switching tube, fly-wheel diode, battery pole plates front end electric capacity; The bridge inverter main circuit of rear class comprises full bridge inversion circuit, filter inductance and the bus Support Capacitor that four switching tubes consist of; The negative pole of non-return diode is connected an end with an end of boost inductance respectively and is connected with battery pole plates front end electric capacity, an other end of boost inductance is connected with the collector electrode of chopping switching tube (T), the positive pole of fly-wheel diode respectively, the negative pole of fly-wheel diode is connected with full bridge inversion circuit respectively, and two brachium pontis intermediate points of full bridge inversion circuit are connected with the two ends of filter inductance respectively.
Characteristics of the present utility model are to be applicable to single-phase photovoltaic DC-to-AC converter, and the battery pole plates wide input voltage range can carry out maximum power tracing, and the electric energy power factor of inversion is adjustable, can efficient stable realize generating electricity by way of merging two or more grid systems of photovoltaic system.
Description of drawings
Fig. 1 is two-stage type single-phase photovoltaic grid-connected inverter Structural drawing.
Embodiment
The below further illustrates with reference to the accompanying drawings for example:
Embodiment 1
As shown in Figure 1, a kind of two-stage type single-phase photovoltaic grid-connected inverter topological structure, it comprises the booster circuit of prime and the bridge inverter main circuit of rear class, the booster circuit of prime comprises non-return diode D1, boost inductance L1, chopping switching tube T, sustained diode 2, battery pole plates front end capacitor C 1; The bridge inverter main circuit of rear class comprises full bridge inversion circuit, filter inductance L2 and the bus Support Capacitor C2 that four switching tube VT1, VT2, VT3, VT4 consist of; The negative pole of non-return diode D1 is connected with the end that the end of boost inductance L1 is connected with battery pole plates front end capacitor C respectively, the other end of boost inductance L1 is connected with the collector electrode of chopping switching tube T, the positive pole of sustained diode 2 respectively, the negative pole of sustained diode 2 is connected with bus Support Capacitor C2, full bridge inversion circuit respectively, and two brachium pontis intermediate point A.B of full bridge inversion circuit are connected with the two ends of filter inductance L2 respectively.Can carry out the calculation of parameter of device and choose according to different power grades and specification requirement and control method.The utility model adopts two-step way, prime is booster circuit, major function is that the lower output voltage that photovoltaic cell sends is upgraded to the quiescent potential that meets that inversion grid connection requires, stable DC bus-bar voltage and regulate solar cell, make it be operated in maximum power point corresponding position, complete the MPPT function.Rear class is the single-phase full bridge inverter circuit, with the dc inverter telegram in reply net of prime.
Claims (1)
1. two-stage type single-phase photovoltaic grid-connected inverter topological structure, comprise the booster circuit of prime and the bridge inverter main circuit of rear class, it is characterized in that: the booster circuit of prime comprises non-return diode (D1), boost inductance (L1), chopping switching tube (T), fly-wheel diode (D2), battery pole plates front end electric capacity (C1); The bridge inverter main circuit of rear class comprises full bridge inversion circuit, filter inductance (L2) and the bus Support Capacitor (C2) that four switching tubes (VT1, VT2, VT3, VT4) consist of; The negative pole of non-return diode (D1) is connected C1 with an end of boost inductance (L1) respectively with battery pole plates front end electric capacity) an end be connected, an other end of boost inductance (L1) is connected with the collector electrode of chopping switching tube (T), the positive pole of fly-wheel diode (D2) respectively, the negative pole of fly-wheel diode (D2) is connected with bus Support Capacitor (C2), full bridge inversion circuit respectively, and two brachium pontis intermediate points of full bridge inversion circuit are connected with the two ends of filter inductance (L2) respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220615261 CN202978744U (en) | 2012-11-20 | 2012-11-20 | Two-stage single-phase photovoltaic grid-connected inverter topological structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220615261 CN202978744U (en) | 2012-11-20 | 2012-11-20 | Two-stage single-phase photovoltaic grid-connected inverter topological structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202978744U true CN202978744U (en) | 2013-06-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220615261 Expired - Fee Related CN202978744U (en) | 2012-11-20 | 2012-11-20 | Two-stage single-phase photovoltaic grid-connected inverter topological structure |
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| CN (1) | CN202978744U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103825299A (en) * | 2014-02-28 | 2014-05-28 | 深圳市长昊机电有限公司 | Grid-connected photovoltaic power generation system and control method thereof |
| CN106611961A (en) * | 2015-10-27 | 2017-05-03 | 上海交通大学 | Chained cascade global self-synchronization solar photovoltaic power generation control device with inertia link and method |
| CN108169596A (en) * | 2017-12-22 | 2018-06-15 | 湖南科比特新能源科技股份有限公司 | A kind of calibration system of photovoltaic DC-to-AC converter input current channel and the method calibrated using the calibration system |
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2012
- 2012-11-20 CN CN 201220615261 patent/CN202978744U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103825299A (en) * | 2014-02-28 | 2014-05-28 | 深圳市长昊机电有限公司 | Grid-connected photovoltaic power generation system and control method thereof |
| CN106611961A (en) * | 2015-10-27 | 2017-05-03 | 上海交通大学 | Chained cascade global self-synchronization solar photovoltaic power generation control device with inertia link and method |
| CN106611961B (en) * | 2015-10-27 | 2019-01-08 | 上海交通大学 | Chain type with inertial element cascades universe motor synchronizing solar energy power generating control device and method |
| CN108169596A (en) * | 2017-12-22 | 2018-06-15 | 湖南科比特新能源科技股份有限公司 | A kind of calibration system of photovoltaic DC-to-AC converter input current channel and the method calibrated using the calibration system |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| 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: 20130605 Termination date: 20211120 |