CN204539082U - A kind of photovoltaic intelligent confluxes cabinet - Google Patents
A kind of photovoltaic intelligent confluxes cabinet Download PDFInfo
- Publication number
- CN204539082U CN204539082U CN201520256161.7U CN201520256161U CN204539082U CN 204539082 U CN204539082 U CN 204539082U CN 201520256161 U CN201520256161 U CN 201520256161U CN 204539082 U CN204539082 U CN 204539082U
- Authority
- CN
- China
- Prior art keywords
- voltage
- cabinet
- input
- output
- photovoltaic
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Classifications
-
- 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
Landscapes
- Photovoltaic Devices (AREA)
Abstract
A kind of photovoltaic intelligent confluxes cabinet, the photovoltaic cell tandem input of cabinet of confluxing is connected with the input of voltage sensor, the output of voltage sensor is connected with the input of voltage comparator circuit, the output of voltage comparator circuit is connected with the control pole of thyristor, between the positive pole and negative pole of photovoltaic cell tandem input and between the positive pole of adjacent photovoltaic cell tandem and negative pole, access thyristor.The output voltage that the utility model can solve existing photovoltaic conflux cabinet can not change along with the change of external condition, thus causes output voltage not reach the problem of grid-connected requirement.
Description
Technical field
The utility model belongs to electronic circuit field, particularly relates to a kind of photovoltaic intelligent and to conflux cabinet.
Background technology
Photovoltaic conflux cabinet is a kind of equipment for monitoring photovoltaic cell tandem and peripheral auxiliary element in photovoltaic generating system, when equipment normally works, array produces direct current through illumination, and direct current is input to the cabinet that confluxes wealthy stream in parallel, then outputs to inverter by the cabinet that confluxes.
In photovoltaic generating system, in order to remove to improve the output current of cabinet of confluxing, voltage, multiple cell is gone here and there by usual employing, assembly is packaged into after parallel connection, then assembly is formed square formation and access the cabinet that confluxes, under such compound mode, the series parallel structure inputting the photovoltaic module of the cabinet that confluxes is fixing, but for photovoltaic generation, photovoltaic cell is electric energy by solar radiation by light energy conversion, its power stage is directly limited by the impact of the external environment changes such as light and temperature, when intensity of illumination or ambient temperature etc. change time, its power also changes thereupon, the direct voltage so inputting inverter also can change with the change of external condition.If battery strings columns is less, voltage may be very low, will cause inverter failure, can not be normally grid-connected, even in the grid-connected concussion that can cause bulk power grid in situation.In existing research field, usually adopt copped wave booster circuit to go to improve voltage levvl, but in the application of reality, voltage can only be improved 3 ~ 5 times by booster circuit, this, for the lower situation of voltage, still can not solve the low problem of voltage effectively; In contrast, increase raising voltage by battery strings columns, although meet voltage request when intensity of illumination is lower, when illumination strengthens, voltage will be very high, and this will make the components and parts of inverter be burned.Therefore, in the cabinet output voltage that confluxes, lack one can along with the change of external conditions such as temperature, intensity of illumination time, the device of the automatically series and parallel combination of adjustment photovoltaic module.
Utility model content
Technical problem to be solved in the utility model is for above-mentioned the deficiencies in the prior art, the cabinet and a kind of photovoltaic intelligent provided confluxes, the output voltage that it can solve existing photovoltaic conflux cabinet can not change along with the change of external condition, thus causes output voltage not reach the problem of grid-connected requirement.
The object of utility model is achieved in that
A kind of photovoltaic intelligent confluxes cabinet, the photovoltaic cell tandem input of cabinet of confluxing is connected with the input of voltage sensor, the output of voltage sensor is connected with the input of voltage comparator circuit, the output of voltage comparator circuit is connected with the control pole of thyristor, between the positive pole and negative pole of photovoltaic cell tandem input and between the positive pole of adjacent photovoltaic cell tandem and negative pole, access thyristor.
Concrete, voltage sensor is Hall voltage transducer, voltage comparator circuit is the two group window comparators that the voltage comparator being LM393 by model is formed, the voltage input end of voltage comparator circuit is connected with the voltage output end of Hall voltage transducer, and the model of Hall voltage transducer is BJHVS5.
Fuse, diode, circuit breaker is also serially connected with between described photovoltaic cell tandem input and output.
Further, between the positive pole and negative pole of photovoltaic cell tandem output, lightning protection device is provided with.
Adopt said structure, after several photovoltaic tandem parallel connection access photovoltaic conflux cabinets, monitor by being arranged on the voltage of Hall voltage transducer to input confluxed in cabinet, the result of monitoring is transferred to the input of voltage compare control circuit, contrast with set value, if the magnitude of voltage measured is in the limits of setting, positive pulse (thyristor to battery tandem positive pole and negative pole place sends out negative pulse) is sent out to the thyristor be connected between the positive pole of adjacent cell tandem and negative pole, make its conducting (shutoff), now battery tandem is by series operation, if measured magnitude of voltage is outside the limits of setting, negative pulse (thyristor to battery tandem positive pole and negative pole place sends out positive pulse) is sent out to the thyristor be connected between adjacent cell tandem positive pole and negative pole, make it turn off (conducting), now battery tandem is by parallel running.
Like this by being arranged on the series-parallel connection device confluxed in cabinet, the battery tandem of confluxing in cabinet is made to carry out the structural rearrangement of serial or parallel connection with the change of extraneous natural environment, the magnitude of voltage of input inverter no longer has larger change with the change of external environment, can be in all the time in the voltage range of normal inversion, the output voltage of the cabinet that makes to conflux well meets grid-connected requirement.
Accompanying drawing explanation
Below in conjunction with drawings and Examples, the utility model is described in further detail:
Fig. 1 is structured flowchart of the present utility model;
Fig. 2 is the circuit diagram of photovoltaic combiner box in the utility model;
Fig. 3 is the connecting circuit figure of voltage comparator circuit and thyristor in the utility model.
Embodiment
Photovoltaic intelligent confluxes cabinet as shown in Figure 1, the photovoltaic cell tandem input 2 of cabinet 1 of confluxing is connected with the input of voltage sensor 3, the output of voltage sensor 3 is connected with the input of voltage comparator circuit 4, the output of voltage comparator circuit 4 is connected with the control pole of thyristor 5, between the positive pole and negative pole of photovoltaic cell tandem input 2 and between the positive pole of adjacent photovoltaic cell tandem and negative pole, access thyristor 5.
Concrete, voltage sensor 3 is Hall voltage transducer, and the model of Hall voltage transducer is BJHVS5.
As shown in Figure 3, voltage comparator circuit 4 is two group window comparators that the voltage comparator being LM393 by model is formed, the voltage input end of voltage comparator circuit 4 is connected with the voltage output end of Hall voltage transducer, the voltage that Hall voltage transducer collects and certain certain value that variable resistor sets are made comparisons, when applied signal voltage numerical value is at threshold voltage U
rEFHwith threshold voltage U
rEFLbetween, i.e. U
rEFH>U
in>U
rEFLtime, the output of two comparators of Part I is all low level, and diode ends, output U
out1for low level, two comparators of Part II all export high level, diode conducting, output U
out2for high level; As applied signal voltage U
innumerical value outside window voltage, i.e. U
in>U
rEFHor U
in<U
rEFLtime, the output of two comparators of Part I is all high level, diode current flow, output U
out1for high level, two equal output low levels of comparator of Part II, diode ends, output U
out2for low level, by above control principle, the pulse signal obtained is sent to the control end of thyristor.
If the magnitude of voltage of Hall voltage sensor measurement is in the scope of setting, then send out positive pulse by voltage comparator circuit to the thyristor be connected between adjacent photovoltaic cell tandem positive pole and negative pole, and send out negative pulse to the positive pole of photovoltaic cell tandem and the thyristor at negative pole place, now photovoltaic cell tandem is by series operation;
If the magnitude of voltage of Hall voltage sensor measurement is outside the scope of setting, then send out negative pulse by voltage comparator circuit to the thyristor be connected between adjacent photovoltaic cell tandem positive pole and negative pole, and send out positive pulse to the positive pole of photovoltaic cell tandem and the thyristor at negative pole place, now photovoltaic cell tandem is by parallel running.
As shown in Figure 2, fuse 6, diode 7, circuit breaker 8 is also serially connected with between photovoltaic cell tandem input and output; Lightning protection device 9 is provided with between the positive pole and negative pole of photovoltaic cell tandem output.
Adopt said structure, during use, by being arranged on the series-parallel connection device confluxed in cabinet, the battery tandem of confluxing in cabinet is made to carry out the structural rearrangement of serial or parallel connection with the change of extraneous natural environment, the magnitude of voltage of input inverter no longer has larger change with the change of external environment, can be in all the time in the voltage range of normal inversion, the output voltage of the cabinet that makes to conflux well meets grid-connected requirement.
Claims (5)
1. a photovoltaic intelligent confluxes cabinet, it is characterized in that: the photovoltaic cell tandem input (2) of the cabinet that confluxes (1) is connected with the input of voltage sensor (3), the output of voltage sensor (3) is connected with the input of voltage comparator circuit (4), the output of voltage comparator circuit (4) is connected with the control pole of thyristor (5), between the positive pole and negative pole of photovoltaic cell tandem input (2) and between the positive pole of adjacent photovoltaic cell tandem and negative pole, access thyristor (5).
2. photovoltaic intelligent according to claim 1 confluxes cabinet, it is characterized in that: described voltage sensor (3) is Hall voltage transducer, voltage comparator circuit (4) is the two group window comparators that the voltage comparator being LM393 by model is formed, and the voltage input end of voltage comparator circuit (4) is connected with the voltage output end of Hall voltage transducer.
3. photovoltaic intelligent according to claim 2 confluxes cabinet, it is characterized in that: the model of described Hall voltage transducer is BJHVS5.
4. photovoltaic intelligent according to claim 1 confluxes cabinet, it is characterized in that: be also serially connected with fuse (6), diode (7), circuit breaker (8) between described photovoltaic cell tandem input and output.
5. the photovoltaic intelligent according to claim 1 or 4 confluxes cabinet, it is characterized in that: between the positive pole and negative pole of photovoltaic cell tandem output, be provided with lightning protection device (9).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520256161.7U CN204539082U (en) | 2015-04-24 | 2015-04-24 | A kind of photovoltaic intelligent confluxes cabinet |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201520256161.7U CN204539082U (en) | 2015-04-24 | 2015-04-24 | A kind of photovoltaic intelligent confluxes cabinet |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204539082U true CN204539082U (en) | 2015-08-05 |
Family
ID=53753038
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201520256161.7U Expired - Fee Related CN204539082U (en) | 2015-04-24 | 2015-04-24 | A kind of photovoltaic intelligent confluxes cabinet |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204539082U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655087A (en) * | 2016-11-30 | 2017-05-10 | 中国电力工程顾问集团华东电力设计院有限公司 | Combiner box protection device and method |
| CN106684816A (en) * | 2016-11-30 | 2017-05-17 | 中国电力工程顾问集团华东电力设计院有限公司 | Combiner box protection device and method |
-
2015
- 2015-04-24 CN CN201520256161.7U patent/CN204539082U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655087A (en) * | 2016-11-30 | 2017-05-10 | 中国电力工程顾问集团华东电力设计院有限公司 | Combiner box protection device and method |
| CN106684816A (en) * | 2016-11-30 | 2017-05-17 | 中国电力工程顾问集团华东电力设计院有限公司 | Combiner box protection device and method |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104330746B (en) | Energy-saving ageing testing device of inverter | |
| CN102722212A (en) | Maximum power point tracking method for photovoltaic power generation system under non-uniform illumination | |
| CN107895945B (en) | Battery plate potential difference compensation system | |
| KR101135990B1 (en) | Solar photovoltaic generating system using variable array | |
| CN103956970B (en) | Have the photovoltaic confluence device of anti-PID function concurrently | |
| CN102253278A (en) | Startup condition detection method suitable for photovoltaic inverter with DC/DC (direct current/direct current) | |
| CN103558503A (en) | Earth fault detection circuit of photovoltaic inverter | |
| CN107885274B (en) | Photovoltaic array intelligent voltage compensator | |
| CN107977038B (en) | Solar array voltage compensation device | |
| CN204539082U (en) | A kind of photovoltaic intelligent confluxes cabinet | |
| CN104678175A (en) | Square-matrix insulation resistance detection system for photovoltaic power generation system | |
| CN203398779U (en) | Super capacitor module group with two-level dynamic balancing circuit | |
| CN203103330U (en) | Intelligent photovoltaic lightning protection anti-reverse junction box | |
| KR102142608B1 (en) | Photovoltaic system monitoring for solar cell array | |
| CN201464592U (en) | Leakage detection device for photovoltaic grid-connected inverter | |
| CN204794899U (en) | Failure detector circuit of integrated unit of solar PV modules | |
| CN210744761U (en) | Grid-connected solar photovoltaic power generation system for building | |
| CN103888048A (en) | Solar generator | |
| CN202978236U (en) | Current limiting protection circuit of AC current of photovoltaic inverter | |
| CN204167977U (en) | For the charge controller of generation of electricity by new energy device | |
| CN202651632U (en) | Novel intelligent photovoltaic conjunction box | |
| CN203840275U (en) | Photovoltaic confluence device additionally with anti-PID function | |
| CN204119112U (en) | A kind of family expenses 500W solar electric power supply system | |
| CN202421322U (en) | Confluence monitoring device with temperature compensation function | |
| CN105244907A (en) | Plug-and-play solar optical recording integration control system and method |
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: 20150805 Termination date: 20160424 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |