CN103684030A - Novel high-performance grid-connected photovoltaic inverter - Google Patents
Novel high-performance grid-connected photovoltaic inverter Download PDFInfo
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- CN103684030A CN103684030A CN201310746510.9A CN201310746510A CN103684030A CN 103684030 A CN103684030 A CN 103684030A CN 201310746510 A CN201310746510 A CN 201310746510A CN 103684030 A CN103684030 A CN 103684030A
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
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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 invention relates to a novel high-performance grid-connected photovoltaic inverter. The novel high-performance grid-connected photovoltaic inverter comprises a grid-connected photovoltaic inverter body, the grid-connected photovoltaic inverter body comprises a mechanism frame, a console, a mainboard and an I/O (input/output) interface, and a power module, a BOOST module and an INVERTER module are arranged inside the mainboard. According to the grid-connected photovoltaic inverter system of the novel high-performance grid-connected photovoltaic inverter, the BOOST module utilizes an efficient ZVT-BOOST soft switching adjuster topological structure, zero turn-on loss and zero turn-off loss of a switch tube can be basically achieved, and the highest conversion rate can reach 98.91%; the INVERTER portion utilizes a novel H-type full bridge inverter topological structure, the reliability and the DC EMI effects are good, the conversion efficiency reaches 97.6%, and the conversion power is higher than European level; through the improvement on the BOOST module and the INVERTER module, the conversion efficiency of the whole grid-connected photovoltaic inverter system is remarkably improved, and accordingly the efficiency of the whole grid-connected photovoltaic inverter system can also be greatly improved.
Description
Technical field:
The present invention relates to grid-connected photovoltaic power generation system equipment technical field, refer in particular to a kind of novel high-performance grid-connected photovoltaic inverter.
Background technology:
Grid-connected photovoltaic inverter system is that DC inverter that solar panel is sent becomes and amplitude, frequency and the phase place of line voltage inversion system of identical alternating current all.The conversion efficiency of inversion system is significant for the efficiency of whole grid-connected photovoltaic power generation system, and the efficiency that therefore how to improve Grid-connected photovoltaic inverter system is just very crucial.In existing Grid-connected photovoltaic inverter system, inverter mainly has the following disadvantages: 1, the aspect such as the conversion efficiency of inverter, intelligent degree, stability is stable not; 2, not strong to grid adaptability; 3,
Safety defencive function is comprehensive not; 4, structural manufacturing process is perfect not, makes transfer power high not, haves much room for improvement.
Summary of the invention:
The object of the invention is to overcome the deficiencies in the prior art part, a kind of novel high-performance grid-connected photovoltaic inverter is provided.
The technical scheme that the present invention realizes its object employing is: a kind of novel high-performance grid-connected photovoltaic inverter, it comprises grid-connected photovoltaic inverter body, grid-connected photovoltaic inverter body includes institutional framework, operation bench, mainboard and I/O interface, in described mainboard, be provided with power module, BOOST module and INVERTER module, wherein: described BOOST module comprises BOOST inductance, the first switching tube, the second auxiliary tube assembly, the 3rd switching tube, and BUS electric capacity, described the first switching tube, the 3rd switching tube, BUS capacitance component is in parallel, described the second auxiliary tube assembly is connected with the 3rd switching tube, described the second auxiliary tube assembly comprises with the auxiliary capacitor of BOOST inductance in parallel and is connected to four booster diodes in circuit, described BUS capacitance component is formed by the first electric capacity and the second capacitances in series.
Described INVERTER module has by the 4th switching tube, the 5th switching tube, the 6th switching tube, minion closes the H type full-bridge inverting assembly that pipe bridge formula is formed by connecting, the input of H type full-bridge inverting assembly is connected with described BOOST module, and the circuit of output terminal of H type full-bridge inverting assembly comprises the 8th switching tube, the 9th switching tube, two diodes, the 3rd electric capacity, the 4th electric capacity, the second inductance, the 3rd inductance; Wherein, the 8th switching tube is connected with one of them diode, and the 9th switching tube is connected with another diode; The 3rd electric capacity and the 4th capacitances in series; And two ends are connected respectively the second inductance and the 3rd inductance after the series circuit reverse parallel connection of the series circuit of the 8th switching tube, diode and the 9th switching tube, diode, the second inductance and the 3rd inductance are connected respectively the two ends of the 3rd electric capacity, the 4th capacitor seriesing circuit again.
The first described switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube, the 7th switching tube are metal-oxide layer semiconductcor field effect transistor, are called for short metal-oxide half field effect transistor (MOSFET); The 3rd described switching tube, the 8th switching tube, the 9th switching tube are insulated gate bipolar transistor (being called for short IGBT).
The institutional framework of described grid-connected photovoltaic inverter body is comprised of front shroud and back shroud, and which is provided with man-machine interface and fin.
Described operation bench consists of host computer and display screen, is connected by RS232 interface with described mainboard.
In Grid-connected photovoltaic inverter system of the present invention, BOOST module adopts the soft switch adjuster topological structure of efficient ZVT-BOOST, substantially realizes switching tube and opens and close loss off zero, and high-conversion rate can reach 98.91%; And INVERTER partly adopts novel H type full-bridge inverting topological structure, reliability and DC EMI are effective, and conversion efficiency reaches 97.6%, and transfer power is higher than European level; By the improvement to BOOST module and INVERTER module, the conversion efficiency of whole Grid-connected photovoltaic inverter system is significantly improved, thereby the efficiency of whole grid-connected photovoltaic power generation system is also significantly improved.In addition, the present invention adopts double CPU for redundant design, more improves the complementation to the various functions of inverter, and Grid-connected photovoltaic inverter system of the present invention is strengthened grid adaptability, also strengthens its safety defencive function simultaneously.
Accompanying drawing explanation:
Fig. 1 is the formation block diagram of grid-connected photovoltaic inverter of the present invention;
Fig. 2 is the connection block diagram of Grid-connected photovoltaic inverter system of the present invention;
Fig. 3 is the circuit diagram of BOOST module and INVERTER module in the present invention.
Embodiment:
Below in conjunction with specific embodiments and the drawings, the present invention is further described.
As shown in Figure 1-Figure 3, novel high-performance grid-connected photovoltaic inverter of the present invention, it comprises grid-connected photovoltaic inverter body, grid-connected photovoltaic inverter body includes institutional framework 1, operation bench 2, mainboard 3 and I/O interface 4, in described mainboard 3, be provided with power module 31, BOOST module 32 and INVERTER module 33, wherein: described BOOST module 32 comprises BOOST inductance L r, the first switching tube Q1, the second auxiliary tube assembly Q2, the 3rd switching tube Q3, and BUS electric capacity, the first switching tube Q1, the 3rd switching tube Q3, BUS capacitance component is in parallel, described the second auxiliary tube assembly Q2 connects with the 3rd switching tube Q3, described the second auxiliary tube assembly Q2 comprises the auxiliary capacitor Cr in parallel with BOOST inductance L r and is connected to four booster diode D2 in circuit, D3, D4, D5, described BUS capacitance component is in series by the first capacitor C 1 and the second capacitor C 2.BOOST module input connects filter inductance L1; Lossless when wherein auxiliary capacitor Cr, diode D3 can make the 3rd switching tube Q3 turn-off, therefore, substantially to realize switching tube and open and close loss off zero, high-conversion rate can reach 98.91%.
Described INVERTER module 33 has the H type full-bridge inverting assembly being formed by connecting by the 4th switching tube Q4, the 5th switching tube Q5, the 6th switching tube Q6, the 7th switching tube Q7 bridge-type, the input of H type full-bridge inverting assembly is connected with described BOOST module, and the circuit of output terminal of H type full-bridge inverting assembly comprises the 8th switching tube Q8, the 9th switching tube Q9, two diode D6, D7, the 3rd capacitor C 3, the 4th capacitor C 4, the second inductance L 2, the 3rd inductance L 3; Wherein, the 8th switching tube Q8 connects with diode D6, and the 9th switching tube Q9 connects with diode D7; The 3rd capacitor C 3 is connected with the 4th capacitor C 5; And after the series circuit reverse parallel connection of the series circuit of the 8th switching tube Q8, diode D6 and the 9th switching tube Q9, diode D7, two ends are connected respectively the two ends that the second inductance L 2 and the 3rd inductance L 3, the second inductance L 2 and the 3rd inductance L 3 are connected respectively the 3rd capacitor C 3, the 4th capacitor C 5 series circuits again.
The first described switching tube Q1, the 4th switching tube Q4, the 5th switching tube Q5, the 6th switching tube Q6, the 7th switching tube Q7 are metal-oxide layer semiconductcor field effect transistor, are called for short metal-oxide half field effect transistor (MOSFET); The 3rd described switching tube Q3, the 8th switching tube Q8, the 9th switching tube Q9 are insulated gate bipolar transistor (being called for short IGBT).
The institutional framework 1 of described grid-connected photovoltaic inverter body comprises the shell 11 being comprised of front shroud and back shroud, and which is provided with man-machine interface 12 and fin 13.Described operation bench 2 consists of host computer 21 and display screen 22, is connected by RS232 interface 23 with described mainboard 3.
In grid-connected photovoltaic inverter of the present invention, BOOST module adopts the soft switch adjuster topological structure of efficient ZVT-BOOST, substantially realizes switching tube and opens and close loss off zero, and high-conversion rate can reach 98.91%; And INVERTER partly adopts novel H type full-bridge inverting topological structure, reliability and DC EMI are effective, and conversion efficiency reaches 97.6%, and transfer power is higher than European level; By the improvement to BOOST module and INVERTER module, the conversion efficiency of whole Grid-connected photovoltaic inverter system is significantly improved, thereby the efficiency of whole grid-connected photovoltaic power generation system is also significantly improved.In addition, the present invention adopts double CPU for redundant design, more improves the complementation to the various functions of inverter, and Grid-connected photovoltaic inverter system of the present invention is strengthened grid adaptability, also strengthens its safety defencive function simultaneously.
Claims (5)
1. a novel high-performance grid-connected photovoltaic inverter, it comprises grid-connected photovoltaic inverter body, grid-connected photovoltaic inverter body includes institutional framework, operation bench, mainboard and I/O interface, in described mainboard, be provided with power module, BOOST module and INVERTER module, it is characterized in that: described BOOST module comprises BOOST inductance, the first switching tube, the second auxiliary tube assembly, the 3rd switching tube, and BUS electric capacity, described the first switching tube, the 3rd switching tube, BUS capacitance component is in parallel, described the second auxiliary tube assembly is connected with the 3rd switching tube, described the second auxiliary tube assembly comprises with the auxiliary capacitor of BOOST inductance in parallel and is connected to four booster diodes in circuit, described BUS capacitance component is formed by the first electric capacity and the second capacitances in series.
2. novel high-performance grid-connected photovoltaic inverter according to claim 1, it is characterized in that: described INVERTER module has by the 4th switching tube, the 5th switching tube, the 6th switching tube, minion closes the H type full-bridge inverting assembly that pipe bridge formula is formed by connecting, the input of H type full-bridge inverting assembly is connected with described BOOST module, and the circuit of output terminal of H type full-bridge inverting assembly comprises the 8th switching tube, the 9th switching tube, two diodes, the 3rd electric capacity, the 4th electric capacity, the second inductance, the 3rd inductance; Wherein, the 8th switching tube is connected with diode D6, and the 9th switching tube is connected with diode D7; The 3rd electric capacity and the 4th capacitances in series; And two ends are connected respectively the second inductance and the 3rd inductance after the series circuit reverse parallel connection of the series circuit of the 8th switching tube, diode D6 and the 9th switching tube, diode D7, the second inductance and the 3rd inductance are connected respectively the two ends of the 3rd electric capacity, the 4th capacitor seriesing circuit again.
3. novel high-performance grid-connected photovoltaic inverter according to claim 1 and 2, is characterized in that: the first described switching tube, the 4th switching tube, the 5th switching tube, the 6th switching tube, the 7th switching tube are metal-oxide layer semiconductcor field effect transistor; The 3rd described switching tube, the 8th switching tube, the 9th switching tube are insulated gate bipolar transistor.
4. novel high-performance grid-connected photovoltaic inverter according to claim 1, is characterized in that: the institutional framework of described grid-connected photovoltaic inverter body is comprised of front shroud and back shroud, and which is provided with man-machine interface and fin.
5. novel high-performance grid-connected photovoltaic inverter according to claim 1, is characterized in that: described operation bench consists of host computer and display screen, is connected by RS232 interface with described mainboard.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310746510.9A CN103684030A (en) | 2013-12-30 | 2013-12-30 | Novel high-performance grid-connected photovoltaic inverter |
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| CN201310746510.9A CN103684030A (en) | 2013-12-30 | 2013-12-30 | Novel high-performance grid-connected photovoltaic inverter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104021014A (en) * | 2014-05-23 | 2014-09-03 | 江苏兆伏新能源有限公司 | Firmware upgrading method based on double-CPU system |
| WO2016161746A1 (en) * | 2015-04-09 | 2016-10-13 | 京东方科技集团股份有限公司 | Power supply circuit and power supply method |
| WO2017197629A1 (en) * | 2016-05-19 | 2017-11-23 | 胡炎申 | Current source inverter system and inverter device |
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| EP1369985A2 (en) * | 2002-05-15 | 2003-12-10 | Frauenhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Inverter for transforming a DC voltage into an AC current or an AC voltage |
| CN202103436U (en) * | 2011-01-28 | 2012-01-04 | 扬州晶旭电源有限公司 | Photovoltaic grid-connected inverter system based on embedded human-computer interface |
| CN102411075A (en) * | 2011-11-29 | 2012-04-11 | 宁波高新区新诚电子有限公司 | Solar photovoltaic cell simulation system and simulation method for same |
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2013
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Patent Citations (3)
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| EP1369985A2 (en) * | 2002-05-15 | 2003-12-10 | Frauenhofer-Gesellschaft zur Förderung der angewandten Forschung e.V. | Inverter for transforming a DC voltage into an AC current or an AC voltage |
| CN202103436U (en) * | 2011-01-28 | 2012-01-04 | 扬州晶旭电源有限公司 | Photovoltaic grid-connected inverter system based on embedded human-computer interface |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104021014A (en) * | 2014-05-23 | 2014-09-03 | 江苏兆伏新能源有限公司 | Firmware upgrading method based on double-CPU system |
| CN104021014B (en) * | 2014-05-23 | 2018-09-25 | 艾思玛新能源技术（扬中）有限公司 | A kind of firmware upgrade method based on dual-CPU system |
| WO2016161746A1 (en) * | 2015-04-09 | 2016-10-13 | 京东方科技集团股份有限公司 | Power supply circuit and power supply method |
| US9859734B2 (en) | 2015-04-09 | 2018-01-02 | Boe Technology Group Co., Ltd. | Power supply circuit and power supply method |
| WO2017197629A1 (en) * | 2016-05-19 | 2017-11-23 | 胡炎申 | Current source inverter system and inverter device |
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