CN202385026U - Miniature photovoltaic inverter - Google Patents
Miniature photovoltaic inverter Download PDFInfo
- Publication number
- CN202385026U CN202385026U CN 201120553723 CN201120553723U CN202385026U CN 202385026 U CN202385026 U CN 202385026U CN 201120553723 CN201120553723 CN 201120553723 CN 201120553723 U CN201120553723 U CN 201120553723U CN 202385026 U CN202385026 U CN 202385026U
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- China
- Prior art keywords
- circuit
- power frequency
- photovoltaic inverter
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- component interface
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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
The utility model relates to a miniature photovoltaic inverter, and belongs to the technical field of photovoltaic power generation application. The technical scheme is that: the miniature photovoltaic inverter comprises a crystalline silicon cell component interface (1), an interleaved flyback direct current/direct current (DC/DC) booster circuit (2), a direct current/alternating current (DC/AC) power frequency commutation circuit (3), a filter circuit (4) and a microprocessor circuit (5), wherein the crystalline silicon cell component interface, the interleaved flyback DC/DC booster circuit, the DC/AC power frequency commutation circuit and the filter circuit are sequentially connected, and are connected with the microprocessor circuit. By an interleaving technology, input and output current ripples can be reduced, so that the service life of a capacitor is prolonged, and total harmonic distortion is reduced; and input and output current are shared, so that the copper loss and iron loss of a flyback transformer are reduced. The miniature photovoltaic inverter has the characteristics of high overall power generation efficiency, small size, convenience for mounting, high reliability, suitability for large-scale production, low cost and the like.
Description
Technical field
The utility model relates to the miniature inverter of a kind of photovoltaic, belongs to the photovoltaic generation applied technical field.
Background technology
Solar energy is human available the most directly one of clean energy resource, also is the basis of future source of energy structure.Inverter is the important step in the grid-connected photovoltaic system, and background technology adopts centralized inverter, and existing problems are: the entire system generating efficiency is not high, volume big, inconvenience, poor reliability are installed, be not suitable for large-scale production, the cost height.
The utility model content
The purpose of the utility model provides the miniature inverter of a kind of photovoltaic, and the entire system generating efficiency is high, volume is little, easy for installation, reliability is high, be fit to large-scale production, cost is low, solves the problems referred to above that background technology exists.
The technical scheme of the utility model is:
The miniature inverter of a kind of photovoltaic; Comprise crystal silicon battery component interface 1, interleaving inverse excitation DC/DC booster circuit 2, DC/AC power frequency commutating circuit 3, filter circuit 4 and microcontroller circuit 5; Crystal silicon battery component interface, interleaving inverse excitation DC/DC booster circuit, DC/AC power frequency commutating circuit are connected successively with filter circuit, and connect microcontroller circuit jointly.
Between interleaving inverse excitation DC/DC booster circuit and DC/AC power frequency commutating circuit, switching tube is set.
Interleaving inverse excitation DC/DC booster circuit is made up of anti-violent change depressor, switch mosfet pipe, rectifier diode, filter capacitor.
The direct voltage of crystal silicon battery component interface is added in interleaving inverse excitation DC/DC booster circuit; The anti-MOSFET of swashing drives with the SPMW of high frequency; At the anti-sinusoidal output voltage that swashs generation rectification on the electric capacity of exporting; Two flyback converter work phases phasic difference 180 degree is so that interleaved operation, and DC/AC power frequency commutating circuit carries out switch work with power frequency, converts rectifier output voltage to sinusoidal voltage.Filter circuit filtering HF switch harmonic wave has guaranteed the quality of grid-connected current.Microcontroller circuit makes battery component export with the maximum power mode through to battery component voltage, current sample, and digital phase-locked loop makes the output current and the synchronized of inverter.
The beneficial effect of the utility model is: the interleaving technique of the utility model can reduce the input and output current ripples; Thereby prolong the electric capacity life-span and reduce total harmonic distortion; The shared input and output electric current of interleaving technique, thus anti-violent change depressor copper loss and iron loss reduced.The utlity model has characteristics such as the entire system generating efficiency is high, volume is little, easy for installation, reliability is high, be fit to large-scale production, cost is low.
Description of drawings
Fig. 1 is the utility model embodiment sketch map;
Fig. 2 is the utility model electrical schematic diagram;
Among the figure: crystal silicon battery component interface 1, interleaving inverse excitation DC/DC booster circuit 2, DC/AC power frequency commutating circuit 3, filter circuit 4, microcontroller circuit 5.
Embodiment
Below in conjunction with accompanying drawing, the utility model is further specified through embodiment.
The miniature inverter of a kind of photovoltaic; Comprise crystal silicon battery component interface 1, interleaving inverse excitation DC/DC booster circuit 2, DC/AC power frequency commutating circuit 3, filter circuit 4 and microcontroller circuit 5; Crystal silicon battery component interface, interleaving inverse excitation DC/DC booster circuit, DC/AC power frequency commutating circuit are connected successively with filter circuit, and connect microcontroller circuit jointly.
Between interleaving inverse excitation DC/DC booster circuit and DC/AC power frequency commutating circuit, switching tube is set.
Interleaving inverse excitation DC/DC booster circuit 2 is made up of anti-violent change depressor T1, switch mosfet pipe Q1, rectifier diode D1, filter capacitor C2, anti-violent change depressor T2, switch mosfet pipe Q2, rectifier diode D2, filter capacitor C3.Switch mosfet pipe Q1 and Q2 drive with the SPMW of high frequency, and work phase phasic difference 180 degree interleaved operations produce the sinusoidal output voltage of rectification on the electric capacity of anti-sharp output.
Under generation isolated island and battery component short-circuit conditions, switching tube Q3 and electrical network break off fully, guarantee system safety.DC/AC power frequency commutating circuit 3 is made up of controllable silicon D3, switch mosfet pipe Q4, controllable silicon D4, switch mosfet pipe Q5, and it will instead swash output voltage and convert sinusoidal voltage to the work of power frequency switch.Filter circuit 4 is made up of inductance L 1, inductance L 2, capacitor C 4, filter circuit filtering HF switch harmonic wave, the quality of assurance grid-connected current.Microcontroller circuit 5 makes battery component export with the maximum power mode through to battery component voltage, current sample, and digital phase-locked loop makes the output current and the synchronized of inverter.
Claims (2)
1. miniature inverter of photovoltaic; It is characterized in that: comprise crystal silicon battery component interface (1), interleaving inverse excitation DC/DC booster circuit (2), DC/AC power frequency commutating circuit (3), filter circuit (4) and microcontroller circuit (5); Crystal silicon battery component interface, interleaving inverse excitation DC/DC booster circuit, DC/AC power frequency commutating circuit are connected successively with filter circuit, and connect microcontroller circuit jointly.
2. a kind of photovoltaic miniature inverter according to claim 1 is characterized in that between interleaving inverse excitation DC/DC booster circuit and DC/AC power frequency commutating circuit, switching tube being set.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120553723 CN202385026U (en) | 2011-12-27 | 2011-12-27 | Miniature photovoltaic inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120553723 CN202385026U (en) | 2011-12-27 | 2011-12-27 | Miniature photovoltaic inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202385026U true CN202385026U (en) | 2012-08-15 |
Family
ID=46633496
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120553723 Expired - Fee Related CN202385026U (en) | 2011-12-27 | 2011-12-27 | Miniature photovoltaic inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202385026U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102882414A (en) * | 2012-09-26 | 2013-01-16 | 浙江昱能光伏科技集成有限公司 | Off-grid direct-current-to-alternating-current system |
| CN103051235A (en) * | 2012-12-27 | 2013-04-17 | 保定天威集团有限公司 | Photovoltaic module inverter |
| CN103401463A (en) * | 2013-07-25 | 2013-11-20 | 天津大学 | Miniature photovoltaic grid-connected inverter with optimized DC (Direct Current) bus capacitor and control method |
-
2011
- 2011-12-27 CN CN 201120553723 patent/CN202385026U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102882414A (en) * | 2012-09-26 | 2013-01-16 | 浙江昱能光伏科技集成有限公司 | Off-grid direct-current-to-alternating-current system |
| CN103051235A (en) * | 2012-12-27 | 2013-04-17 | 保定天威集团有限公司 | Photovoltaic module inverter |
| CN103401463A (en) * | 2013-07-25 | 2013-11-20 | 天津大学 | Miniature photovoltaic grid-connected inverter with optimized DC (Direct Current) bus capacitor and control method |
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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: 20120815 Termination date: 20131227 |