CN203233318U - Distributed natural cooling photovoltaic inverter system - Google Patents
Distributed natural cooling photovoltaic inverter system Download PDFInfo
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- CN203233318U CN203233318U CN 201220666858 CN201220666858U CN203233318U CN 203233318 U CN203233318 U CN 203233318U CN 201220666858 CN201220666858 CN 201220666858 CN 201220666858 U CN201220666858 U CN 201220666858U CN 203233318 U CN203233318 U CN 203233318U
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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 the photovoltaic inversion field, and refers to a distributed natural cooling photovoltaic inverter system. The technical scheme is that the distributed natural cooling photovoltaic inverter system comprises an inversion unit, inverters, a central control unit, a RS485 bus and a liquid crystal touch screen; the central control unit is electrically connected with the inversion unit, the inverters and the RS485 bus; the liquid crystal touch screen is connected with the central control unit; and the inverters are distributed in a solar cell panel array. The distributed natural cooling photovoltaic inverter system employs the inverters arranged in the solar cell panel array in a distributed manner to realize distributed photovoltaic inversion, thereby saving cost and improving inversion efficiency; switch elements are employed to greatly reduce conduction loss, greatly improve whole machine efficiency, and natural cooling can be adapted; step waveform output is employed to improve filtering efficiency; and the RS485 bus can greatly improve transmission efficiency of the system.
Description
Technical field
The utility model relates to photovoltaic inversion field, particularly a kind of distributed photovoltaic alternation device system of cooling off naturally.
Background technology
Because conventional inverter is to concentrate to place, this photovoltaic inversion scheme needs many thick cables that each header box and concentrated inverter are coupled together, simultaneously, inverter bridge generally will adopt switching device IGBT high pressure resistant, big electric current, but IGBT internal resistance, driving power are all very big, and (IGBT is generally 1 ~ 2KHz) to the switching frequency height.Therefore, this conventional inverter has following shortcoming: the thick cable quantity that 1, connects concentrated inverter and header box is many, length is long; 2, because the inverter bridge DC input voitage reaches more than the 720V, must adopt high withstand voltage IGBT as switching device; 3, IGBT switching frequency height, conducting internal resistance are big, and switching loss and conduction loss are corresponding also bigger, add that inverter is to concentrate inversion, so must install forced cooling device additional.
The utility model content
A kind of distributed photovoltaic DC-to-AC converter system of cooling off naturally that the utility model provides, by disperseing inversion unit, with metal-oxide-semiconductor place of switches device IGBT, switching frequency is dropped to 50Hz from 1-2KHz, adopt high-efficiency reliable RS485 data/address bus, address the above problem.
The technical solution of the utility model is achieved in that a kind of distributed photovoltaic DC-to-AC converter system of cooling off naturally, also comprise inversion unit, inverter, central control unit, RS485 bus and liquid crystal touch screen, described central control unit and inversion unit, inverter, RS485 bus electrically connect, liquid crystal touch screen is connected with central control unit, and described inverter disperses to be arranged in the solar panel array.
Described inversion unit comprises solar panel and switching device, described inversion unit cascade.
Optimally, described switching device is metal-oxide-semiconductor.
Further, described inversion unit comprises a solar panel and 2 metal-oxide-semiconductors.
Described central control unit comprises touch-screen control CPU and inversion control CPU, and described touch-screen control CPU is connected with liquid crystal touch screen, and described inversion control CPU is connected with inversion unit, RS485 bus.
Described RS485 bus comprises data transmit-receive unit and signal isolated location, and described RS485 bus connects inversion control CPU and inversion unit respectively.
Optimally, also comprise photovoltaic controller, described photovoltaic controller is connected with inversion control CPU, inversion unit.
Described photovoltaic controller comprises voltage detection unit, current detecting unit and buck unit.
Described metal-oxide-semiconductor control inversion unit output staircase waveform.
A kind of distributed photovoltaic DC-to-AC converter system of cooling off naturally that the utility model provides by inverter is disperseed to be arranged in the solar panel array, realizes the distributed photovoltaic inversion, saves cost, improves inversion efficiency; By the use of switching device, reduce conduction loss greatly, improve overall efficiency greatly, and can adopt the nature cooling; By staircase waveform output, improve filtration efficiency; Improve the efficiency of transmission of system greatly by the RS485 bus.
Description of drawings
In order to be illustrated more clearly in the utility model embodiment or technical scheme of the prior art, to do to introduce simply to the accompanying drawing of required use in embodiment or the description of the Prior Art below, apparently, accompanying drawing in describing below only is embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain other accompanying drawing according to these accompanying drawings.
Fig. 1: the utility model structural representation.
Among the figure: 100, central control unit; 110, touch-screen control CPU; 120, inversion control CPU; 200, photovoltaic controller; 210, voltage detection unit; , 220, current detecting unit; 230, buck unit; 300, inversion unit; 310, solar panel; 320, switching device; 400, RS485 bus; 410, data transmit-receive unit; 420, signal isolated location.
Embodiment
Below in conjunction with the accompanying drawing among the utility model embodiment, the technical scheme among the utility model embodiment is clearly and completely described, obviously, described embodiment only is the utility model part embodiment, rather than whole embodiment.Based on the embodiment in the utility model, those of ordinary skills are not making the every other embodiment that obtains under the creative work prerequisite, all belong to the scope of the utility model protection.
A kind of distributed photovoltaic DC-to-AC converter system of cooling off naturally that the utility model provides, also comprise inversion unit 300, inverter, central control unit 100, RS485 bus 400 and liquid crystal touch screen, described central control unit 100 electrically connects with inversion unit 300, inverter, RS485 bus 400, liquid crystal touch screen is connected with central control unit 100, and described inverter disperses to be arranged in solar panel 310 arrays.Described inversion unit 300 comprises solar panel 310 and switching device 320, described inversion unit 300 cascades.Optimally, described switching device 320 is metal-oxide-semiconductor.Further, described inversion unit 300 comprises a solar panel 310 and 2 metal-oxide-semiconductors.Described central control unit 100 comprises touch-screen control CPU110 and inversion control CPU120, and described touch-screen control CPU110 is connected with liquid crystal touch screen, and described inversion control CPU120 is connected with inversion unit 300, RS485 bus 400.Described RS485 bus 400 comprises data transmit-receive unit 410 and signal isolated location 420, and described RS485 bus 400 connects inversion control CPU120 and inversion unit 300 respectively.Optimally, also comprise photovoltaic controller 200, described photovoltaic controller 200 is connected with inversion control CPU120, inversion unit 300.Described photovoltaic controller 200 comprises voltage detection unit 210, current detecting unit and buck unit 230.Described metal-oxide-semiconductor control inversion unit 300 output staircase waveforms.
The utility model central control unit 100 comprises 4 CPU, wherein 3 is inversion control CPU120, be responsible for carrying out communication and providing synchronizing signal by RS485 bus 400 to it with inversion unit 300, through behind the three-phase reactor, detect corresponding voltage, electric current, and determine the operating state of inversion unit 300 and oneself generation synchronizing signal whether according to electrical network suspension signal and synchronizing signal; Other one is touch-screen control CPU110, mainly responsible prosecution liquid crystal touch screen processed.
Liquid crystal touch screen uses the serial ports LCDs, and its demonstration and output are controlled by CPU.Use the cost of serial ports LCDs the chances are 5% of industrial panel computer, reduce the cost of man-machine interface greatly.
The utility model adopts staircase waveform output, has that output harmonic wave content is little, filtering is easy to characteristics, and in general, the inversion module quantity of forming every phase is more many, and waveform is made an appointment, and the conventional inverter of forming than IGBT has bigger superiority.
The utility model has also adopted system synchronization signal, data communication in the communication module of a RS485 bus 400, comprise data transmit-receive unit 410 and signal isolated location 420, can realize the Collaborative Control between the inversion unit 300, effectively solve because data are separated transmission with synchronizing signal, take shortcomings such as communication channel, transmission error rate are low more, improved efficiency of transmission simultaneously greatly.
Switching device 320 of the present utility model adopts metal-oxide-semiconductor, and cost is low, and conducting internal resistance RON is low to moderate 1 milliohm, and conduction loss is very little; Because the utility model is made up of a plurality of inversion units 300, the utility model adopts the inverting of staircase waveform output, and switching frequency is down to 50Hz, and therefore in the utility model, the MOS switching loss can be ignored; But and the metal-oxide-semiconductor parallel running, after the MOS parallel connection, equivalent conducting resistance can and reduce along with number increase in parallel, and for the inversion system of specific power output, conduction loss also can reduce, and conduction loss is main loss in the utility model; Switching loss can be ignored, and conduction loss is smaller, for increasing substantially overall efficiency, not needing the air blast cooling device that the important techniques guarantee is provided.
A kind of distributed photovoltaic DC-to-AC converter system of cooling off naturally that the utility model provides by inverter is disperseed to be arranged in solar panel 310 arrays, realizes the distributed photovoltaic inversion, saves cost, improves inversion efficiency; By the use of switching device 320, reduce conduction loss greatly, improve overall efficiency greatly, and can adopt the nature cooling; By staircase waveform output, improve filtration efficiency; Improve the efficiency of transmission of system greatly by RS485 bus 400.
Certainly; under the situation that does not deviate from the utility model spirit and essence thereof; those of ordinary skill in the art should make various corresponding changes and distortion according to the utility model, but these corresponding changes and distortion all should belong to the protection range of the appended claim of the utility model.
Claims (9)
1. distributed cooling naturally photovoltaic DC-to-AC converter system, it is characterized in that: also comprise inversion unit (300), inverter, central control unit (100), RS485 bus (400) and liquid crystal touch screen, described central control unit (100) electrically connects with inversion unit (300), inverter, RS485 bus (400), liquid crystal touch screen is connected with central control unit (100), and described inverter disperses to be arranged in solar panel (310) array.
2. a kind of distributed cooling naturally according to claim 1 photovoltaic DC-to-AC converter system, it is characterized in that: described inversion unit (300) comprises solar panel (310) and switching device (320), described inversion unit (300) cascade.
3. a kind of distributed cooling naturally according to claim 2 photovoltaic DC-to-AC converter system, it is characterized in that: described switching device (320) is metal-oxide-semiconductor.
4. a kind of distributed cooling naturally according to claim 1 photovoltaic DC-to-AC converter system, it is characterized in that: described inversion unit (300) comprises a solar panel (310) and 2 metal-oxide-semiconductors.
5. a kind of distributed cooling naturally according to claim 1 photovoltaic DC-to-AC converter system, it is characterized in that: described central control unit (100) comprises touch-screen control CPU(110) and inversion control CPU(120), described touch-screen control CPU(110) be connected described inversion control CPU(120 with liquid crystal touch screen) be connected with inversion unit (300), RS485 bus (400).
6. a kind of distributed cooling naturally according to claim 1 photovoltaic DC-to-AC converter system, it is characterized in that: described RS485 bus (400) comprises data transmit-receive unit (410) and signal isolated location (420), and described RS485 bus (400) connects inversion control CPU(120 respectively) and inversion unit (300).
7. a kind of distributed cooling naturally according to claim 5 photovoltaic DC-to-AC converter system is characterized in that: also comprise photovoltaic controller (200), described photovoltaic controller (200) and inversion control CPU(120), inversion unit (300) is connected.
8. a kind of distributed cooling naturally according to claim 7 photovoltaic DC-to-AC converter system, it is characterized in that: described photovoltaic controller (200) comprises voltage detection unit (210), current detecting unit and buck unit (230).
9. a kind of distributed photovoltaic DC-to-AC converter system of cooling off naturally according to claim 3 is characterized in that: described metal-oxide-semiconductor control inversion unit (300) output staircase waveform.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220666858 CN203233318U (en) | 2012-12-07 | 2012-12-07 | Distributed natural cooling photovoltaic inverter system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220666858 CN203233318U (en) | 2012-12-07 | 2012-12-07 | Distributed natural cooling photovoltaic inverter system |
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| Publication Number | Publication Date |
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| CN203233318U true CN203233318U (en) | 2013-10-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201220666858 Expired - Fee Related CN203233318U (en) | 2012-12-07 | 2012-12-07 | Distributed natural cooling photovoltaic inverter system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102983769A (en) * | 2012-12-07 | 2013-03-20 | 云南储光科技有限公司 | Distributed naturally-cooling photovoltaic inverter system |
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2012
- 2012-12-07 CN CN 201220666858 patent/CN203233318U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102983769A (en) * | 2012-12-07 | 2013-03-20 | 云南储光科技有限公司 | Distributed naturally-cooling photovoltaic inverter system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20131009 Termination date: 20151207 |
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| EXPY | Termination of patent right or utility model |