CN204349903U - A kind of photovoltaic combining inverter accessory power supply - Google Patents
A kind of photovoltaic combining inverter accessory power supply Download PDFInfo
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- CN204349903U CN204349903U CN201520052957.0U CN201520052957U CN204349903U CN 204349903 U CN204349903 U CN 204349903U CN 201520052957 U CN201520052957 U CN 201520052957U CN 204349903 U CN204349903 U CN 204349903U
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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
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- 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
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Abstract
The utility model embodiment discloses a kind of photovoltaic combining inverter accessory power supply.The utility model embodiment comprises: PV double tube positive exciting circuit, AC double tube positive exciting circuit, control circuit, start-up circuit, opto-coupled feedback circuit group and electric pressure converter; PV double tube positive exciting circuit comprises PV and inputs positive pole, PV input negative pole and PV output group; AC double tube positive exciting circuit comprises AC and inputs positive pole, AC input negative pole and AC output; Start-up circuit comprises start-up circuit input positive pole, start-up circuit input negative pole and start-up circuit output; Start-up circuit input positive pole inputs positive pole with PV and is connected, and start-up circuit input negative pole inputs negative pole with PV and is connected; Start-up circuit output is connected with control circuit; Control circuit is connected with PV double tube positive exciting circuit; Control circuit is connected with opto-coupled feedback circuit group; Opto-coupled feedback circuit group is connected with PV output group; AC output is connected with PV output group; PV output group is connected with electric pressure converter.
Description
Technical field
The utility model relates to industrial control field, particularly relates to a kind of photovoltaic combining inverter accessory power supply.
Background technology
Along with the development of photovoltaic industry, inverter is image height effect, low cost, small size, high reliability future development more and more, inverter accessory power supply is as one of the vitals of inverter, and belong to unit larger in inverter, the innovation of its technology plays important effect to inverter technology.
Current most of frequency converter accessory power supply intelligence provides one or two kind of voltage source, and most of frequency converter accessory power supply is powered by grid alternating current.
This frequency converter accessory power supply, when electrical network no-voltage or electrical network low voltage, can not power to inverter work, need external ups power uninterruptedly to power to inverter work.
Utility model content
The utility model embodiment provides a kind of photovoltaic combining inverter accessory power supply, for solving traditional frequency conversion device accessory power supply when electrical network no-voltage or electrical network low voltage, the problem can not powered to inverter work.
In view of this, this use is novel provides a kind of photovoltaic combining inverter accessory power supply, comprising:
PV double tube positive exciting circuit, AC double tube positive exciting circuit, control circuit, start-up circuit, opto-coupled feedback circuit group and electric pressure converter;
Described PV double tube positive exciting circuit comprises PV and inputs positive pole, PV input negative pole and PV output group;
Described AC double tube positive exciting circuit comprises AC and inputs positive pole, AC input negative pole and AC output;
Described start-up circuit comprises start-up circuit input positive pole, start-up circuit input negative pole and start-up circuit output;
Described start-up circuit input positive pole inputs positive pole with described PV and is connected, and described start-up circuit input negative pole inputs negative pole with described PV and is connected;
Described start-up circuit output is connected with described control circuit;
Described control circuit is connected with described PV double tube positive exciting circuit;
Described control circuit is connected with described opto-coupled feedback circuit group;
Described opto-coupled feedback circuit group is connected with described PV output group;
Described AC output is connected with described PV output group;
Described PV output group is connected with described electric pressure converter.
Alternatively, described PV circuit output end group comprises PV first output, PV second output and PV the 3rd output;
Described opto-coupled feedback circuit group comprises the first opto-coupled feedback circuit, the second opto-coupled feedback circuit and the 3rd opto-coupled feedback circuit.
Alternatively, described opto-coupled feedback circuit group is connected with described PV circuit output end group and comprises:
The first end of described first opto-coupled feedback circuit is connected with described PV first output;
The first end of described second opto-coupled feedback circuit is connected with described PV second output;
The first end of described 3rd opto-coupled feedback circuit is connected with described PV the 3rd output;
Second end of the second end of described first opto-coupled feedback circuit, the second end of the second opto-coupled feedback circuit and the 3rd opto-coupled feedback circuit is connected with described control circuit respectively.
Alternatively, described PV first output is 12V voltage output end, and described PV second output is 24V voltage output end, and described PV the 3rd output is 48V voltage output end.
Alternatively, described AC circuit output end is connected with described PV circuit output end group and comprises:
Described AC circuit output end is connected with described PV first output.
Alternatively, described PV circuit output end group is connected with described electric pressure converter and comprises:
Described PV first output is connected with described electric pressure converter.
Alternatively, also protective circuit is comprised between described AC circuit output end and described PV circuit output end group.
Alternatively, described protective circuit comprises protection diode;
Described AC circuit output end is connected with described PV circuit output end group and is specially:
Described AC circuit output end is connected with the anode of described protection diode, and the negative electrode of described protection diode is connected with described PV circuit output end group.
Alternatively, it is characterized in that, described PV double tube positive exciting circuit and AC double tube positive exciting circuit adopt carborundum Mosfet pipe and silicon carbide diode broadband semiconductor components and parts as switching device.
As can be seen from the above technical solutions, the utility model embodiment has the following advantages: it is main supply power mode that photovoltaic combining inverter accessory power supply adopts PV to power, namely the two-tube cathode circuit of PV is main power supply circuits, the PV direct current that photovoltaic module can be inputted is the direct current of multiple voltage through PV double tube positive exciting circuit conversion, for other assembly power supplies of inverter, simultaneously, AC double tube positive exciting circuit is adopted to be auxiliary power supply circuit, AC double tube positive exciting circuit is used for when disconnecting at night or PV circuit, is inverter power supply.Because the utility model have employed PV supply power mode, thus avoid traditional scheme and use the situation that there is electrical network no-voltage or electrical network low voltage during grid alternating current input.
Accompanying drawing explanation
Fig. 1 is the first schematic diagram of photovoltaic combining inverter accessory power supply in the utility model embodiment;
Fig. 2 is the second schematic diagram of photovoltaic combining inverter accessory power supply in the utility model embodiment;
Fig. 3 is the 3rd schematic diagram of photovoltaic combining inverter accessory power supply in the utility model embodiment.
Embodiment
The utility model embodiment provides a kind of photovoltaic combining inverter accessory power supply, for solving traditional frequency conversion device accessory power supply when electrical network no-voltage or electrical network low voltage, the problem can not powered to inverter work.
The utility model scheme is understood better in order to make those skilled in the art person, below in conjunction with the accompanying drawing in the utility model embodiment, technical scheme in the utility model embodiment is clearly and completely described, obviously, described embodiment is only the embodiment of the utility model part, instead of whole embodiments.Based on the embodiment in the utility model, those of ordinary skill in the art are not making the every other embodiment obtained under creative work prerequisite, all should belong to the scope of the utility model protection.
Term " first ", " second ", " the 3rd " " 4th " etc. (if existence) in specification of the present utility model and claims and above-mentioned accompanying drawing are for distinguishing similar object, and need not be used for describing specific order or precedence.In addition, term " comprises " and " having " and their any distortion, intention is to cover not exclusive comprising, such as, contain those unit that the system of a series of unit, product or equipment are not necessarily limited to clearly list, but can comprise clearly do not list or for these products or intrinsic other step of equipment or unit.
Refer to Fig. 1, in the utility model, an embodiment of photovoltaic combining inverter accessory power supply comprises:
PV double tube positive exciting circuit 101, start-up circuit 102, control circuit 103, opto-coupled feedback circuit group 104, AC double tube positive exciting circuit 105 and electric pressure converter 106;
Wherein, PV double tube positive exciting circuit 101 comprises PV input positive pole, PV input negative pole and PV output group;
Start-up circuit 102 comprises start-up circuit input positive pole, start-up circuit input negative pole and start-up circuit output;
AC double tube positive exciting circuit 105 comprises AC and inputs positive pole, AC input negative pole and AC output;
Start-up circuit input positive pole inputs positive pole with PV and is connected, and start-up circuit input negative pole inputs negative pole with PV and is connected;
Start-up circuit output is connected with control circuit 103;
Control circuit 103 is connected with PV double tube positive exciting circuit 101;
Control circuit 103 and opto-coupled feedback circuit group phase 104 are connected;
Opto-coupled feedback circuit group 104 is connected with PV output group;
AC output is connected with PV output group;
PV output group is connected with electric pressure converter 106.
It should be noted that, in the present embodiment and follow-up embodiment, PV double tube positive exciting circuit and AC double tube positive exciting circuit adopt carborundum Mosfet pipe and silicon carbide diode broadband semiconductor components and parts as switching device, carborundum Mosfet manages and silicon carbide diode broadband semiconductor components and parts have the advantages that switching loss is little, switching frequency is high and conversion efficiency is high, the circuit structure of forward converter can be simplified, and improve the switch efficiency of circuit.
In actual applications; protective circuit can also be set further between AC output and PV output group; protective circuit specifically can comprise protection diode; the anode of this protection diode is connected with AC output; the negative electrode of this protection diode is connected with PV output group; protective circuit can also comprise other assemblies, does not specifically limit herein.
In the present embodiment, it is main supply power mode that photovoltaic combining inverter accessory power supply adopts PV to power, namely the two-tube cathode circuit of PV is main power supply circuits, the PV direct current that photovoltaic module can be inputted is the direct current of multiple voltage through PV double tube positive exciting circuit conversion, for other assembly power supplies of inverter, meanwhile, AC double tube positive exciting circuit is adopted to be auxiliary power supply circuit, AC double tube positive exciting circuit is used for when disconnecting at night or PV circuit, is inverter power supply.Because the utility model have employed PV supply power mode, thus avoid traditional scheme and use the situation that there is electrical network no-voltage or electrical network low voltage during grid alternating current input.
In actual applications, the PV output group of PV double tube positive exciting circuit comprises: PV first output, PV second output and PV the 3rd output, the voltage source that three kinds different can be provided, in this correspondence, opto-coupled feedback circuit group also comprises the first opto-coupled feedback circuit, the second opto-coupled feedback circuit and the 3rd opto-coupled feedback circuit, the output information that PV can be exported short group by opto-coupled feedback circuit group feeds back to control circuit, is described below to the concrete annexation of PV double tube positive exciting circuit, control circuit and opto-coupled feedback circuit three:
Refer to Fig. 2, in the utility model, another embodiment of photovoltaic combining inverter accessory power supply comprises:
PV double tube positive exciting circuit 201, control circuit 202 and opto-coupled feedback circuit group 203;
Wherein, PV double tube positive exciting circuit 101 comprises that PV inputs positive pole, PV inputs negative pole and PV output group, and PV output group comprises PV first output, PV second output and PV the 3rd output;
Opto-coupled feedback circuit group 203 comprises the first opto-coupled feedback circuit, the second opto-coupled feedback circuit and the 3rd opto-coupled feedback circuit;
The first end of the first opto-coupled feedback circuit is connected with PV first output;
The first end of the second opto-coupled feedback circuit is connected with PV second output;
The first end of the 3rd opto-coupled feedback circuit is connected with PV the 3rd output;
Second end of the second end of the first opto-coupled feedback circuit, the second end of the second opto-coupled feedback circuit and the 3rd opto-coupled feedback circuit is connected with control circuit respectively.
It should be noted that, in the present embodiment, PV first output, PV second output and PV the 3rd output be respectively 12V voltage output end, 24V voltage output end and 48V voltage output end, be understandable that, in actual applications, the output voltage that PV output group provides by physical circuit setting parameter, can not limit herein.
In the present embodiment, the PV direct current that PV assembly can provide by PV forward converter converts three kinds of different voltage to, to other assembly power supplies of inverter.
Based on basis embodiment illustrated in fig. 2, in the utility model, the annexation of other assemblies that grid-connected subordinate inverter accessory power supply comprises can be specifically:
Refer to Fig. 3, in the utility model, another embodiment of grid-connected subordinate inverter accessory power supply comprises:
PV double tube positive exciting circuit 301, start-up circuit 302, control circuit 303, opto-coupled feedback circuit group 304, AC double tube positive exciting circuit 305 and electric pressure converter 306;
PV double tube positive exciting circuit 301 comprises PV and inputs positive pole, PV input negative pole and PV output group;
Start-up circuit 302 comprises start-up circuit input positive pole, start-up circuit input negative pole and start-up circuit output;
AC double tube positive exciting circuit 305 comprises AC and inputs positive pole, AC input negative pole and AC output;
Start-up circuit input positive pole inputs positive pole with PV and is connected, and start-up circuit input negative pole inputs negative pole with PV and is connected;
Start-up circuit output is connected with control circuit 303;
Control circuit 303 is connected with PV double tube positive exciting circuit 301;
Control circuit 303 and opto-coupled feedback circuit group phase 304 are connected;
Opto-coupled feedback circuit group 304 is connected with PV output group;
AC output is connected with PV first output;
PV first output is connected with electric pressure converter 306;
Wherein, the realization between PV double tube positive exciting circuit 301, control circuit 303 and opto-coupled feedback circuit group 304 and annexation specifically can be similar to the embodiment shown in Fig. 2, repeat no more herein.
In the present embodiment, the 12V voltage source that PV first output provides may be used for powering to inverter master control borad, display unit and RS485 communication module, simultaneously, 12V voltage source converts to after 15V voltage source through electric pressure converter 306, may be used for other module for power supply of inverter master control borad.
The 24V voltage source that PV second output provides may be used for powering to IGBT drive circuit.
The 48V voltage source that PV the 3rd output provides may be used for powering to radiator fan and AC A.C. contactor.
AC output is connected with PV first output, can when disconnecting at night or PV circuit, the voltage source of 12V is provided, power to inverter master control borad, display unit and RS485 communication module, in actual applications, AC double tube positive exciting circuit 305 is in daytime treats operating state, can switch with PV double tube positive exciting circuit realiration free of discontinuities.
It should be noted that, in the present embodiment, PV first output is connected with electric pressure converter 306, can 12V voltage source be converted to 15V voltage source, to other module for power supply of inverter master control borad, be understandable that, in actual applications, also can be changed by PV second output or PV the 3rd output output end voltage power supply, specifically not limit herein.
In actual applications; between AC output and PV output group, can also protective circuit 307 be set further; protective circuit specifically can comprise protection diode; the anode of this protection diode is connected with AC output; the negative electrode of this protection diode is connected with PV output group; protective circuit 307 can also comprise other assemblies, does not specifically limit herein.
In the present embodiment, it is main supply power mode that photovoltaic combining inverter accessory power supply adopts PV to power, namely the two-tube cathode circuit of PV is main power supply circuits, the PV direct current that photovoltaic module can be inputted is the direct current of multiple voltage through PV double tube positive exciting circuit conversion, for other assembly power supplies of inverter, meanwhile, AC double tube positive exciting circuit is adopted to be auxiliary power supply circuit, AC double tube positive exciting circuit is used for when disconnecting at night or PV circuit, is inverter power supply.Because the utility model have employed PV supply power mode, thus avoid traditional scheme and use the situation that there is electrical network no-voltage or electrical network low voltage during grid alternating current input.
The above, above embodiment only in order to the technical solution of the utility model to be described, is not intended to limit; Although be described in detail the utility model with reference to previous embodiment, those of ordinary skill in the art is to be understood that: it still can be modified to the technical scheme described in foregoing embodiments, or carries out equivalent replacement to wherein portion of techniques feature; And these amendments or replacement, do not make the essence of appropriate technical solution depart from the spirit and scope of each embodiment technical scheme of the utility model.
Claims (9)
1. a photovoltaic combining inverter accessory power supply, is characterized in that, comprising:
PV double tube positive exciting circuit, AC double tube positive exciting circuit, control circuit, start-up circuit, opto-coupled feedback circuit group and electric pressure converter;
Described PV double tube positive exciting circuit comprises PV and inputs positive pole, PV input negative pole and PV output group;
Described AC double tube positive exciting circuit comprises AC and inputs positive pole, AC input negative pole and AC output;
Described start-up circuit comprises start-up circuit input positive pole, start-up circuit input negative pole and start-up circuit output;
Described start-up circuit input positive pole inputs positive pole with described PV and is connected, and described start-up circuit input negative pole inputs negative pole with described PV and is connected;
Described start-up circuit output is connected with described control circuit;
Described control circuit is connected with described PV double tube positive exciting circuit;
Described control circuit is connected with described opto-coupled feedback circuit group;
Described opto-coupled feedback circuit group is connected with described PV output group;
Described AC output is connected with described PV output group;
Described PV output group is connected with described electric pressure converter.
2. photovoltaic combining inverter accessory power supply according to claim 1, is characterized in that, described PV circuit output end group comprises PV first output, PV second output and PV the 3rd output;
Described opto-coupled feedback circuit group comprises the first opto-coupled feedback circuit, the second opto-coupled feedback circuit and the 3rd opto-coupled feedback circuit.
3. photovoltaic combining inverter accessory power supply according to claim 2, is characterized in that, described opto-coupled feedback circuit group is connected with described PV circuit output end group and comprises:
The first end of described first opto-coupled feedback circuit is connected with described PV first output;
The first end of described second opto-coupled feedback circuit is connected with described PV second output;
The first end of described 3rd opto-coupled feedback circuit is connected with described PV the 3rd output;
Second end of the second end of described first opto-coupled feedback circuit, the second end of the second opto-coupled feedback circuit and the 3rd opto-coupled feedback circuit is connected with described control circuit respectively.
4. photovoltaic combining inverter accessory power supply according to claim 2, is characterized in that, described PV first output is 12V voltage output end, and described PV second output is 24V voltage output end, and described PV the 3rd output is 48V voltage output end.
5. photovoltaic combining inverter accessory power supply according to claim 4, is characterized in that, described AC circuit output end is connected with described PV circuit output end group and comprises:
Described AC circuit output end is connected with described PV first output.
6. photovoltaic combining inverter accessory power supply according to claim 4, is characterized in that, described PV circuit output end group is connected with described electric pressure converter and comprises:
Described PV first output is connected with described electric pressure converter.
7. photovoltaic combining inverter accessory power supply according to any one of claim 1 to 6, is characterized in that, also comprises protective circuit between described AC circuit output end and described PV circuit output end group.
8. photovoltaic combining inverter accessory power supply according to claim 7, is characterized in that, described protective circuit comprises protection diode;
Described AC circuit output end is connected with described PV circuit output end group and is specially:
Described AC circuit output end is connected with the anode of described protection diode, and the negative electrode of described protection diode is connected with described PV circuit output end group.
9. photovoltaic combining inverter accessory power supply according to any one of claim 1 to 6, it is characterized in that, described PV double tube positive exciting circuit and AC double tube positive exciting circuit adopt carborundum Mosfet pipe and silicon carbide diode broadband semiconductor components and parts as switching device.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201520052957.0U CN204349903U (en) | 2015-01-26 | 2015-01-26 | A kind of photovoltaic combining inverter accessory power supply |
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| CN201520052957.0U CN204349903U (en) | 2015-01-26 | 2015-01-26 | A kind of photovoltaic combining inverter accessory power supply |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106787065A (en) * | 2016-12-21 | 2017-05-31 | 苏州格远电气有限公司 | Wind power pitch-controlled system back-up source charging device and its charge control method |
| CN109565258A (en) * | 2016-04-07 | 2019-04-02 | 索尔特克可再生能源有限公司 | For the equipment for the auxiliary system power supply in electric energy power plant |
-
2015
- 2015-01-26 CN CN201520052957.0U patent/CN204349903U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109565258A (en) * | 2016-04-07 | 2019-04-02 | 索尔特克可再生能源有限公司 | For the equipment for the auxiliary system power supply in electric energy power plant |
| CN109565258B (en) * | 2016-04-07 | 2020-12-15 | 索尔特克可再生能源有限公司 | Device for supplying auxiliary systems in an electrical energy plant |
| CN106787065A (en) * | 2016-12-21 | 2017-05-31 | 苏州格远电气有限公司 | Wind power pitch-controlled system back-up source charging device and its charge control method |
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Address after: 361100 No. 1001, 1003, 1005, 1007 and 1009 Min'an Avenue, torch high tech Zone (Xiang'an) Industrial Zone, Xiamen, Fujian Patentee after: Qingyuan Technology Co.,Ltd. Address before: No. 999-1009 Min'an Avenue, Xiang'an Industrial Zone, Torch High tech Zone, Xiamen City, Fujian Province, 361000 Patentee before: CLENERGY (XIAMEN) TECHNOLOGY Co.,Ltd. |