CN203645569U - Large-power photovoltaic grid connected inverter - Google Patents
Large-power photovoltaic grid connected inverter Download PDFInfo
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- CN203645569U CN203645569U CN201320757152.7U CN201320757152U CN203645569U CN 203645569 U CN203645569 U CN 203645569U CN 201320757152 U CN201320757152 U CN 201320757152U CN 203645569 U CN203645569 U CN 203645569U
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- 230000005669 field effect Effects 0.000 claims description 37
- 238000001914 filtration Methods 0.000 claims description 12
- 230000003993 interaction Effects 0.000 claims description 6
- 238000004891 communication Methods 0.000 claims description 3
- 239000003990 capacitor Substances 0.000 abstract description 5
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 230000005855 radiation Effects 0.000 abstract description 4
- 230000001681 protective effect Effects 0.000 abstract 1
- 238000005516 engineering process Methods 0.000 description 4
- 238000011161 development Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 2
- 235000010894 Artemisia argyi Nutrition 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- 244000030166 artemisia Species 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000002860 competitive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000010248 power generation Methods 0.000 description 1
- 238000012827 research and development Methods 0.000 description 1
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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 discloses a large-power photovoltaic grid connected inverter comprising a DC filter circuit, a boost circuit, and a full-bridge inverter circuit which are successively and electrically connected. Direct current is inputted into the input end of the DC filter circuit. A second capacitor is connected in parallel between the boost circuit and the full-bridge inverter circuit. An inverter further comprises a breaker and a function protective circuit. The output end of the breaker is connected with an AC power grid. By the above manner, received solar radiation energy is converted into high-voltage direct current through high-frequency DC conversion by means of the by a photovoltaic assembly. Then, the high-voltage direct current is inverted by the inverter and sinusoidal alternating current with voltage and phase same as those of the power grid is outputted to the power grid. The large-power photovoltaic grid connected inverter has high work efficiency.
Description
Technical field
The utility model relates to a kind of high-power photovoltaic synchronization inverter.
Background technology
Along with the development of Application of Solar Energy technology, the mainstream development trend of photovoltaic generating system will be grid-connected photovoltaic power generation undoubtedly.And as the combining inverter of one of grid-connected photovoltaic system key device, its runnability directly affects safe, the reliable and high-efficiency operation of grid-connected photovoltaic system.
Since last year, China domestic market progressively starts, and government strengthens support on policy dynamics, and domestic photovoltaic combining inverter demand is soaring in a large number.There is Hefei sunlight, megavolt Chinese mugwort rope in the manufacturer that current domestic inverter has large scale of production, nourish without Xishan hundred million, the auspicious watt of lattice, positive safe power supply, the sub-power supply of hat, Anhui and, section's promise great achievement etc.
From technical elements, China's photovoltaic DC-to-AC converter terminal market is more late start-up time, domestic enterprise still has gap at the aspects such as conversion efficiency, structural manufacturing process, stability and Foreign Advanced Lerel, at present China's small-power inverter technology with abroad substantially in same level, but on high-power combining inverter, still need further to improve and development.
Domestic high-power combining inverter is in efficiency, stability, and integrated level aspect also has gap compared with world level, for these reasons, is necessary oneself research and development high-power photovoltaic synchronization inverter.On the one hand can, at cost efficiency in own project of building from now on, improve enterprise competitiveness, on the other hand also can be by the sale of inverter, increase enterprise's main business income in addition.
According to national policy planning, photovoltaic plant installation will have 10GW left and right every year from now on, and therefore, the high-power photovoltaic synchronization inverter with competitive advantage will have very wide prospect.
Utility model content
The technical problem that the utility model mainly solves is to provide a kind of high-power photovoltaic synchronization inverter, after high-frequency direct-current conversion, become receive the solar radiation energy coming into high voltage direct current by photovoltaic module, through inverter, backward electrical network output and the simple sinusoidal alternating current of line voltage with frequency, homophase are changed in inversion, and operating efficiency is higher.
For solving the problems of the technologies described above, the technical scheme that the utility model adopts is: a kind of high-power photovoltaic synchronization inverter is provided, comprise the DC filtering circuit, booster circuit and the full bridge inverter that are electrically connected successively, the input input dc power of described DC filtering circuit, between described DC filtering circuit and described booster circuit, be connected in parallel to the first electric capacity, between described booster circuit and described full bridge inverter, be connected in parallel to the second electric capacity, described inverter further comprises circuit breaker, and the output of described circuit breaker is connected with AC network.
In preferred embodiment of the utility model, described booster circuit comprises the 3rd inductance, triode and the first diode, between the second end of described the 3rd inductance, the collector electrode of described triode T and the anode of described the first diode, is electrically connected.
In preferred embodiment of the utility model, described DC filtering circuit comprises the first filter inductance, the second filter inductance and the first electric capacity, described the first filter inductance is connected between direct current cathode output end and the first end of described the 3rd inductance, described the second filter inductance is connected between direct current cathode output end and the emitter of described triode T, and described the first electric capacity is connected between the first end of described the 3rd inductance and the emitter of described triode T
In preferred embodiment of the utility model, described full bridge inverter comprises first to fourth VMOS field effect transistor, the drain electrode of the source electrode of a described VMOS field effect transistor and the 2nd VMOS field effect transistor is electrically connected, and the drain electrode of the source electrode of described the 3rd VMOS field effect transistor and the 4th VMOS field effect transistor is electrically connected.
In preferred embodiment of the utility model, the drain electrode of the drain electrode of a described VMOS field effect transistor and described the 3rd VMOS field effect transistor is electrically connected, and the source electrode of the source electrode of described the 2nd VMOS field effect transistor and described the 4th VMOS field effect transistor is electrically connected.
In preferred embodiment of the utility model, between a described source electrode for VMOS field effect transistor and the first input end of described circuit breaker, be connected with the 4th inductance, between the second input of the source electrode of described the 3rd VMOS field effect transistor and described circuit breaker, be connected with the 5th inductance.
In preferred embodiment of the utility model, described inverter further comprises communication interface and human-computer interaction device.
In preferred embodiment of the utility model, described human-computer interaction device comprises LCD display floater.
The beneficial effects of the utility model are: the utility model becomes receive the solar radiation energy coming into high voltage direct current by photovoltaic module after high-frequency direct-current conversion, through inverter, backward electrical network output and the simple sinusoidal alternating current of line voltage with frequency, homophase are changed in inversion, and operating efficiency is higher.
Accompanying drawing explanation
In order to be illustrated more clearly in the technical scheme in the utility model embodiment, below the accompanying drawing of required use during embodiment is described is briefly described, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, do not paying under the prerequisite of creative work, can also obtain according to these accompanying drawings other accompanying drawing, wherein:
Fig. 1 is the structural representation of the utility model one preferred embodiment.
In accompanying drawing, the mark of each parts is as follows: 1, DC filtering circuit; 2, booster circuit; 3, full bridge inverter; 4, circuit breaker; G1, a VMOS field effect transistor; G2, the 2nd VMOS field effect transistor; G3, the 3rd VMOS field effect transistor; G4, the 4th VMOS field effect transistor; C1, the first electric capacity; C2, the second electric capacity; L1, the first filter inductance; L2, the second filter inductance; L3, the 3rd inductance; L4, the 4th inductance; L5, the 5th inductance; D, the first diode; T, triode.
Embodiment
To the technical scheme in the utility model embodiment be clearly and completely described below, obviously, described embodiment is only a part of embodiment of the present utility model, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making all other embodiment that obtain under creative work prerequisite, all belong to the scope of the utility model protection.
Refer to Fig. 1, the utility model embodiment comprises:
A kind of high-power photovoltaic synchronization inverter, comprise the DC filtering circuit 1, booster circuit 2 and the full bridge inverter 3 that are electrically connected successively, the input input dc power of described DC filtering circuit 1, between described DC filtering circuit 1 and described booster circuit 2, be connected in parallel to the first capacitor C 1, between described booster circuit 2 and described full bridge inverter 3, be connected in parallel to the second capacitor C 2, described inverter further comprises circuit breaker 4, and the output of described circuit breaker 4 is connected with AC network.
Wherein, described booster circuit 2 comprises the 3rd inductance L 3, triode T and the first diode D, between the second end of described the 3rd inductance L 3, the collector electrode of described triode T and the anode of described the first diode D, is electrically connected.
Described DC filtering circuit 1 comprises the first filter inductance L1, the second filter inductance L2 and the first capacitor C 1, described the first filter inductance L1 is connected between direct current cathode output end and the first end of described the 3rd inductance L 3, described the second filter inductance L2 is connected between direct current cathode output end and the emitter of described triode T, and described the first capacitor C 1 is connected between the first end of described the 3rd inductance L 3 and the emitter of described triode T.
In the utility model, described full bridge inverter 3 comprises first to fourth VMOS field effect transistor G4, the drain electrode of the source electrode of a described VMOS field effect transistor G1 and the 2nd VMOS field effect transistor G2 is electrically connected, and the drain electrode of the source electrode of described the 3rd VMOS field effect transistor G3 and the 4th VMOS field effect transistor G4 is electrically connected.The drain electrode of the drain electrode of a described VMOS field effect transistor G1 and described the 3rd VMOS field effect transistor G3 is electrically connected, and the source electrode of the source electrode of described the 2nd VMOS field effect transistor G2 and described the 4th VMOS field effect transistor G4 is electrically connected.Between a described source electrode of VMOS field effect transistor G1 and the first input end of described circuit breaker 4, be connected with the 4th inductance L 4, between described the 3rd source electrode of VMOS field effect transistor G3 and the second input of described circuit breaker 4, be connected with the 5th inductance L 5.
Described inverter further comprises communication interface and human-computer interaction device.Described human-computer interaction device comprises LCD display floater.
The utility model becomes receive the solar radiation energy coming into high voltage direct current by photovoltaic module after high-frequency direct-current is changed, and through inverter, backward electrical network output and the simple sinusoidal alternating current of line voltage with frequency, homophase are changed in inversion, and operating efficiency is higher.
The foregoing is only embodiment of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model description to do; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present utility model.
Claims (1)
1. a high-power photovoltaic synchronization inverter, it is characterized in that, comprise the DC filtering circuit (1), booster circuit (2) and the full bridge inverter (3) that are electrically connected successively, the input input dc power of described DC filtering circuit, between described booster circuit and described full bridge inverter, be connected in parallel to the second electric capacity (C2), described inverter further comprises circuit breaker (4), and the output of described circuit breaker is connected with AC network.
2
.high-power photovoltaic synchronization inverter according to claim 1, it is characterized in that, described booster circuit comprises the 3rd inductance (L3), triode (T) and the first diode (D), between the second end of described the 3rd inductance, the collector electrode of described triode and the anode of described the first diode, is electrically connected.
3
.high-power photovoltaic synchronization inverter according to claim 2, it is characterized in that, described DC filtering circuit comprises the first filter inductance (L1), the second filter inductance (L2) and the first electric capacity (C1), described the first filter inductance is connected between direct current cathode output end and the first end of described the 3rd inductance, described the second filter inductance is connected between direct current cathode output end and the emitter of described triode, and described the first electric capacity is connected between described the 3rd first end of inductance and the emitter of described triode.
4
.high-power photovoltaic synchronization inverter according to claim 1, it is characterized in that, described full bridge inverter comprises first to fourth VMOS field effect transistor, the drain electrode of the source electrode of a described VMOS field effect transistor (G1) and the 2nd VMOS field effect transistor (G2) is electrically connected, and the drain electrode of the source electrode of described the 3rd VMOS field effect transistor (G3) and the 4th VMOS field effect transistor (G4) is electrically connected.
5
.high-power photovoltaic synchronization inverter according to claim 4, it is characterized in that, the drain electrode of the drain electrode of a described VMOS field effect transistor and described the 3rd VMOS field effect transistor is electrically connected, and the source electrode of the source electrode of described the 2nd VMOS field effect transistor and described the 4th VMOS field effect transistor is electrically connected.
6
.high-power photovoltaic synchronization inverter according to claim 4, it is characterized in that, between a described source electrode for VMOS field effect transistor and the first input end of described circuit breaker, be connected with the 4th inductance (L4), between the second input of the source electrode of described the 3rd VMOS field effect transistor and described circuit breaker, be connected with the 5th inductance (L5).
7
.high-power photovoltaic synchronization inverter according to claim 1, is characterized in that, described inverter further comprises communication interface and human-computer interaction device.
8
.high-power photovoltaic synchronization inverter according to claim 7, is characterized in that, described human-computer interaction device comprises LCD display floater.
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CN201320757152.7U CN203645569U (en) | 2013-11-27 | 2013-11-27 | Large-power photovoltaic grid connected inverter |
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Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103633865A (en) * | 2013-11-27 | 2014-03-12 | 苏州高创特新能源工程有限公司 | Large-power photovoltaic gird-connected inverter |
CN108134523A (en) * | 2016-11-30 | 2018-06-08 | 镇江常畅光伏电子有限公司 | A kind of photovoltaic combining inverter |
-
2013
- 2013-11-27 CN CN201320757152.7U patent/CN203645569U/en not_active Expired - Fee Related
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN103633865A (en) * | 2013-11-27 | 2014-03-12 | 苏州高创特新能源工程有限公司 | Large-power photovoltaic gird-connected inverter |
CN108134523A (en) * | 2016-11-30 | 2018-06-08 | 镇江常畅光伏电子有限公司 | A kind of photovoltaic combining inverter |
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Granted publication date: 20140611 Termination date: 20161127 |