CN204030628U - A kind of solar photovoltaic generation system - Google Patents
A kind of solar photovoltaic generation system Download PDFInfo
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- CN204030628U CN204030628U CN201420455222.8U CN201420455222U CN204030628U CN 204030628 U CN204030628 U CN 204030628U CN 201420455222 U CN201420455222 U CN 201420455222U CN 204030628 U CN204030628 U CN 204030628U
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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 kind of solar photovoltaic generation system, comprises photovoltaic battery panel, MPPT circuit, inverter circuit and controller; Photovoltaic battery panel comprises several solar modules, and MPPT circuit comprises N number of MPPT unit, and inverter circuit comprises M inversion unit; N number of MPPT unit and solar module are electrically connected, and by direct current remittance to bus, export to the inversion unit worked in inverter circuit, and DC inverter is alternating current by the inversion unit of work, grid-connected power supply; Controller and M inversion unit are electrically connected, according to the inversion unit needing in size control M inversion unit of photovoltaic battery panel power output to devote oneself to work.The utility model advantage is as follows: one, multichannel MPPT unit, improves the maximum power output performance of photovoltaic battery panel.Two, each inversion unit is separate, and device parameters is independent of each other.Three, system output power and inversion unit quantity are directly proportional, and underloading and full load efficiency are almost consistent.
Description
Technical field
The utility model relates to technical field of photovoltaic power generation, particularly relates to a kind of solar photovoltaic generation system.
Background technology
Renewable energy power generation technology is the important channel solving China's power shortages problem, and China's photovoltaic industry is started late compared with other technologies type, but development is very rapid.Photovoltaic generating system is a kind of device solar energy being converted to electric energy, by and receive in electric power system for user.Tradition solar photovoltaic generation system follows the tracks of (Maximum Power Point Tracking primarily of solar module, single largest power points, MPPT) circuit, single inverter composition, as shown in Figure 1, in figure, 101 is photovoltaic battery panel, 102 is MPPT circuit, 103 is inverter, and 104 is electrical network.This is a kind of linear framework, and gather solar energy by solar module and be converted to direct current energy output, through MPPT circuit realiration voltage-regulation and MPPT function, and then inversion grid connection is powered.But, along with the develop rapidly of photovoltaic industry, photovoltaic plant scale based on photovoltaic array is increasing, traditional system architecture presents a lot of deficiency gradually, specifically comprise: one, the solar module string number of single MPPT circuit unit access gets more and more, this has impact very large on the maximum power output of solar module, may cause every block solar module and maximum power point deviation larger.And due to the restriction of power device itself, single MPPT circuit can not access too much solar module string number, and this limits the development of high-power photovoltaic inverter equally.Two, single inverter capacity is increasing, and the device parameters such as inductance capacitance are all according to maximum power design, and during underloading, output current harmonics is comparatively large, has a strong impact on the electrical network quality of power supply.Three, high-power inverter forms complicated, and device is various, and when load is less, power consumption itself is relatively outstanding, reduces inverter operating efficiency.
Utility model content
The purpose of this utility model is by a kind of solar photovoltaic generation system, solves the problem that above background technology part is mentioned.
For reaching this object, the utility model by the following technical solutions:
A kind of solar photovoltaic generation system, it comprises photovoltaic battery panel, MPPT circuit, inverter circuit and controller; Wherein, described photovoltaic battery panel comprises several solar modules, and described MPPT circuit comprises N number of MPPT unit, and described inverter circuit comprises M inversion unit, and M, N are positive integer; Described N number of MPPT unit and solar module are electrically connected, and by direct current remittance to bus, export to the inversion unit worked in described inverter circuit, and described DC inverter is alternating current by the inversion unit of described work, grid-connected power supply; Described controller and M inversion unit are electrically connected, according to the inversion unit needing in size control M inversion unit of photovoltaic battery panel power output to devote oneself to work.
Especially, described MPPT circuit is made up of N number of MPPT unit that electric parameter is identical.
Especially, described inverter circuit is made up of M the inversion unit that power is different.
The solar photovoltaic generation system tool that the utility model proposes has the following advantages: one, multichannel MPPT unit, improves the maximum power output performance of photovoltaic battery panel.Two, each inversion unit is separate, and device parameters is independent of each other, and is conducive to improving the quality of power supply.Three, system output power and inversion unit quantity are directly proportional, and underloading and full load efficiency are almost consistent.
Accompanying drawing explanation
Fig. 1 is the structural representation of traditional solar photovoltaic generation system;
The solar photovoltaic generation system structural representation that Fig. 2 provides for the utility model embodiment.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.Be understandable that, specific embodiment described herein only for explaining the utility model, but not to restriction of the present utility model.It also should be noted that, for convenience of description, illustrate only the part relevant to the utility model in accompanying drawing but not full content.
Please refer to shown in Fig. 2, the solar photovoltaic generation system structural representation that Fig. 2 provides for the utility model embodiment.In the present embodiment, solar photovoltaic generation system specifically comprises photovoltaic battery panel 201, MPPT circuit 202, inverter circuit 203 and controller 204.Described photovoltaic battery panel 201 comprises several solar modules 2011.Described MPPT circuit 202 comprises N number of MPPT unit 2021, and described inverter circuit 203 comprises M inversion unit 2031, M, N and is positive integer.Described N number of MPPT unit 2021 is electrically connected with solar module 2011, by direct current remittance to bus, export to the inversion unit 2031 worked in described inverter circuit 203, described DC inverter is alternating current by the inversion unit 2031 of described work, conflux in inside, finally export to electrical network 205 and power.Described controller 204 is electrically connected, according to the inversion unit 2031 needing in size control M inversion unit 2031 of photovoltaic battery panel 201 power output to devote oneself to work with M inversion unit 2031.
In the present embodiment, described MPPT circuit 202 is made up of N number of MPPT unit 2021 that electric parameter is identical.Each MPPT unit 2021 is existing MPPT maximum power point tracking circuit, and physical circuit formation repeats no more.According to the requirement of native system power designs, in MPPT circuit 202, the quantity of MPPT unit 2021 can increase flexibly or reduce.Such as, the power as single MPPT unit 2021 can be designed to 20kW, produces the solar photovoltaic generation system of a set of 200kW, need 10 MPPT unit 2021 to design; To produce the solar photovoltaic generation system of a set of 500kW, then need MPPT unit 2021 quantity to be increased to 25.After the scheme of solar photovoltaic generation system is determined, the quantity of MPPT unit 2021 just no longer changes.
Described inverter circuit 203 is made up of M the inversion unit 2031 that power is different, flexible and changeable, strong adaptability.But be not limited to this, the power parameter of M inversion unit 2031 also can be designed to unanimously.Each inversion unit 2031 is existing photovoltaic generation inverter.During system works, under the allotment of controller 204, according to the inversion unit 2031 needing in size control M inversion unit 2031 of photovoltaic battery panel 201 power output to devote oneself to work.Such as, the inverter circuit of a 500kW, is made up of 5 inversion units 2031, and each inversion unit 2031 power is 100kW.Noon is sunny, light direct projection, and photovoltaic battery panel 201 power output is comparatively large, and all inversion units 2031 are devoted oneself to work by controller 204, improves energy output.And time in the morning or at dusk, light casts oblique rays on, photovoltaic battery panel 201 power output declines, suppose reduce to full power 40%, controller 204 is by detecting voltage and current parameter on prime bus, determine photovoltaic battery panel 201 actual power power, now only need two inversion units 2031 to work and just can meet power stage.Controller 204 is adjusted each inversion unit 2031 power, retain 1, No. 2 inversion unit 2031 to work on, stop the work of 3,4, No. 5 inversion units 2031, send instruction and make it to enter intelligent park mode, by circuit breaker, it is excised from inversion system again, reduce power consumption.Wake the inversion unit 2031 of dormancy again up at second day noon, close circuit breaker makes it normal work.
The technical solution of the utility model tool has the following advantages: one, multichannel MPPT unit, improves the maximum power output performance of photovoltaic battery panel.Two, each inversion unit is separate, and device parameters is independent of each other, and is conducive to improving the quality of power supply.Three, system output power and inversion unit quantity are directly proportional, and underloading and full load efficiency are almost consistent.
Note, above are only preferred embodiment of the present utility model and institute's application technology principle.Skilled person in the art will appreciate that the utility model is not limited to specific embodiment described here, various obvious change can be carried out for a person skilled in the art, readjust and substitute and protection range of the present utility model can not be departed from.Therefore, although be described in further detail the utility model by above embodiment, but the utility model is not limited only to above embodiment, when not departing from the utility model design, can also comprise other Equivalent embodiments more, and scope of the present utility model is determined by appended right.
Claims (3)
1. a solar photovoltaic generation system, is characterized in that, comprises photovoltaic battery panel, MPPT circuit, inverter circuit and controller; Wherein, described photovoltaic battery panel comprises several solar modules, and described MPPT circuit comprises N number of MPPT unit, and described inverter circuit comprises M inversion unit, and M, N are positive integer; Described N number of MPPT unit and solar module are electrically connected, and by direct current remittance to bus, export to the inversion unit worked in described inverter circuit, and described DC inverter is alternating current by the inversion unit of described work, grid-connected power supply; Described controller and M inversion unit are electrically connected, according to the inversion unit needing in size control M inversion unit of photovoltaic battery panel power output to devote oneself to work.
2. solar photovoltaic generation system according to claim 1, is characterized in that, described MPPT circuit is made up of N number of MPPT unit that electric parameter is identical.
3. the solar photovoltaic generation system according to any one of claim 1 or 2, is characterized in that, described inverter circuit is made up of M the inversion unit that power is different.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420455222.8U CN204030628U (en) | 2014-08-12 | 2014-08-12 | A kind of solar photovoltaic generation system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420455222.8U CN204030628U (en) | 2014-08-12 | 2014-08-12 | A kind of solar photovoltaic generation system |
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| CN204030628U true CN204030628U (en) | 2014-12-17 |
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| CN201420455222.8U Active CN204030628U (en) | 2014-08-12 | 2014-08-12 | A kind of solar photovoltaic generation system |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104124711A (en) * | 2014-08-12 | 2014-10-29 | 无锡上能新能源有限公司 | Solar photovoltaic power generation system |
| CN109888819A (en) * | 2019-01-08 | 2019-06-14 | 许继集团有限公司 | A kind of photovoltaic generating system and its control method and device |
-
2014
- 2014-08-12 CN CN201420455222.8U patent/CN204030628U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104124711A (en) * | 2014-08-12 | 2014-10-29 | 无锡上能新能源有限公司 | Solar photovoltaic power generation system |
| CN109888819A (en) * | 2019-01-08 | 2019-06-14 | 许继集团有限公司 | A kind of photovoltaic generating system and its control method and device |
| CN109888819B (en) * | 2019-01-08 | 2021-02-05 | 许继集团有限公司 | Photovoltaic power generation system and control method and device thereof |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
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| CP01 | Change in the name or title of a patent holder |
Address after: 214174 Jiangsu Province Economic Development Zone, Huishan wind power science and Technology Industrial Park, wind energy road, No. 1 standard factory building Patentee after: SINENG ELECTRIC Co.,Ltd. Address before: 214174 Jiangsu Province Economic Development Zone, Huishan wind power science and Technology Industrial Park, wind energy road, No. 1 standard factory building Patentee before: Top energy Electric Co.,Ltd. Address after: 214174 Jiangsu Province Economic Development Zone, Huishan wind power science and Technology Industrial Park, wind energy road, No. 1 standard factory building Patentee after: Top energy Electric Co.,Ltd. Address before: 214174 Jiangsu Province Economic Development Zone, Huishan wind power science and Technology Industrial Park, wind energy road, No. 1 standard factory building Patentee before: WUXI SINENG NEW ENERGY CO.,LTD. |