CN206364767U - A kind of novel large photovoltaic plant inversion system - Google Patents
A kind of novel large photovoltaic plant inversion system Download PDFInfo
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- CN206364767U CN206364767U CN201621451686.7U CN201621451686U CN206364767U CN 206364767 U CN206364767 U CN 206364767U CN 201621451686 U CN201621451686 U CN 201621451686U CN 206364767 U CN206364767 U CN 206364767U
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- inverter
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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
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Abstract
The utility model provides a kind of novel large photovoltaic plant inversion system, including the photovoltaic array battery layers being made up of several photovoltaic array batteries, the DC/DC converter layers being made up of several DC/DC converters, photovoltaic array battery in the photovoltaic array battery layers connects one to one with the DC/DC converters in DC/DC converter layers, DC/DC converter layers connection direct current confluxes cabinet, the direct current conflux cabinet connection inverter layer, the inverter layer connection step-up transformer layer, the step-up transformer layer is incorporated to AC network；The inverter layer is made up of several inverters, and the step-up transformer layer is made up of several step-up transformers, wherein, the inverter connects one to one with step-up transformer.Many inverter parallels can realize modular independent assortment, can flexibly expand power system capacity.
Description
Technical field
The utility model is related to photovoltaic plant inversion system technical field, especially a kind of novel large photovoltaic plant inversion
System.
Background technology
On July 13rd, 2015, the 1MW grid-connected photovoltaic inverters of First 1500V voltage levels direct currents input are by surveying
Examination.With the proposition of direct current network concept, direct current network circuit low cost, loss are few, and transmission capacity is big, and stability is good, quickly
Controllable, the advantage that asynchronous networking can be achieved progressively is received by people.
Known large-sized photovoltaic power station is run simultaneously by many photovoltaic DC-to-AC converters, when inverter output power reaches volume
When determining 50% of power or so, conversion efficiency reaches maximum, and when inverter output power continues to increase, conversion efficiency is small size
Descending at slow speed, when rated power is exported, decrease in efficiency very little.When inverter output power drops to rated power
When less than 30%, rapid decrease trend is presented in conversion efficiency.For current harmonics coefficient, when inverter output power is in volume
When determining power more than 50%, current harmonics coefficient is smaller, and keeps stable.When inverter output power is arrived in rated power 50%
When 30%, current harmonics coefficient has obvious rising, but numerical value is still smaller.When inverter output power rated power 30% with
When lower, ascendant trend is substantially accelerated, and numerical value increase is more, soon beyond Standard.So in design of photovoltaic power station total work
When rate drops to less than 30%, obvious rising just occurs in current harmonics coefficient.Therefore the 1MW grid-connected photovoltaic inversions of direct current input
The problems such as device effectively solves this.But in current application, or exist when inverter goes wrong, whole power system
The problem of appearance is paralysed or large area is paralysed.
Utility model content
In view of this, main purpose of the present utility model is to provide a kind of novel large photovoltaic plant inversion system.
The technical solution adopted in the utility model is：
A kind of novel large photovoltaic plant inversion system, including
The photovoltaic array battery layers being made up of several photovoltaic array batteries,
Photovoltaic array electricity in the DC/DC converter layers being made up of several DC/DC converters, the photovoltaic array battery layers
Pond connects one to one with the DC/DC converters in DC/DC converter layers, and DC/DC converter layers connection direct current confluxes cabinet,
The direct current confluxes cabinet connection inverter layer, and inverter layer connection step-up transformer layer, the step-up transformer layer is incorporated to friendship
Flow power network；
The inverter layer is made up of several inverters, and the step-up transformer layer is made up of several step-up transformers, its
In, the inverter connects one to one with step-up transformer.
The utility model beneficial effect is：Many inverter parallels can realize modular independent assortment, can be flexible
Expand power system capacity；With high system maintainability, when single inverter breaks down, branch road progress can be disconnected
Separate repair.
Brief description of the drawings
Fig. 1 is frame principle of the present utility model；
Fig. 2 is the grid-connected implementation figure of embodiment in the utility model.
Embodiment
Describe the utility model in detail below in conjunction with accompanying drawing and specific embodiment, herein signal of the present utility model
Property embodiment and explanation be used for explaining the utility model, but be not intended as limiting of the present utility model.
Referring to Figures 1 and 2, the utility model discloses a kind of novel large photovoltaic plant inversion system, including
The photovoltaic array battery layers being made up of several photovoltaic array batteries 1,
Photovoltaic array in the DC/DC converter layers being made up of several DC/DC converters 2, the photovoltaic array battery layers
DC/DC converters 2 in battery 1 and DC/DC converter layers connect one to one, and the DC/DC converter layers connection direct current converges
Flow cabinet 3, the direct current confluxes the connection inverter layer of cabinet 3, inverter layer connection step-up transformer layer, the step-up transformer layer
It is incorporated to AC network 6；
The inverter layer is made up of several inverters 4, and the step-up transformer layer is made up of several step-up transformers 5,
Wherein, the inverter 4 connects one to one with step-up transformer 5.
Using simply being described in the case of single in the present embodiment, but the utility model is not represented just according to implementation
Example is planted the mode described and implemented, reference picture 1, the described connection MPPT function DC/DC of photovoltaic array battery 1 converters 2；Described
The access direct current in parallel of MPPT function DC/DC converters 2 confluxes cabinet 3；The direct current cabinet 3 that confluxes connects multiple inverters 4；Described
Inverter 4 connects independent step-up transformer 5；The shared AC network 6 of the described connection of step-up transformer 5；Described DC/DC
Converter 2 and intelligent DC conflux cabinet 3 and intelligent DC confluxes mutually communicates between cabinet 3 and inverter 4.
The direct current that daytime is produced by photovoltaic array battery 1, MPPT function DC/DC converters 2 are steady by input direct voltage
It is set to 1500V, while drawing the input power of every circuit of photovoltaic array battery 1 by survey calculation；Direct current confluxes cabinet 3 will be defeated
The 1500V direct currents entered are pooled to the different inputs of inverter 4 by power combination, while assigning work or stopping to inverter 4
Order；Inverter 4 performs intelligent DC and confluxed the instruction that cabinet 3 issues, and input dc power is converted into alternating current, the friendship of output
Stream electricity is boosted by step-up transformer 5, is then sent through in AC network 6.
With reference to Fig. 1 and 2, intelligent DC conflux cabinet 3 can according to the size of every line input power of photovoltaic array battery 1,
The working condition of inverter 4, control direct current input combines the different inverter 4 of connection or control inverter 4 by multiple-pole switch
Start and stop, it is ensured that single inverter 4 remains at 50% power and operated above.
The technical scheme disclosed in the utility model embodiment is described in detail above, it is used herein specifically
Embodiment is set forth to the principle and embodiment of the utility model embodiment, and the explanation of above example is only applicable to
Help understands the principle of the utility model embodiment；It is real according to the utility model simultaneously for those of ordinary skill in the art
Example is applied, be will change in embodiment and application, in summary, this specification content should not be understood
For to limitation of the present utility model.
Claims (1)
1. a kind of novel large photovoltaic plant inversion system, it is characterised in that including
The photovoltaic array battery layers being made up of several photovoltaic array batteries,
Photovoltaic array battery in the DC/DC converter layers being made up of several DC/DC converters, the photovoltaic array battery layers with
DC/DC converters in DC/DC converter layers connect one to one, and DC/DC converter layers connection direct current confluxes cabinet, and this is straight
Stream confluxes cabinet connection inverter layer, and inverter layer connection step-up transformer layer, the step-up transformer layer is incorporated to alternating current
Net；
The inverter layer is made up of several inverters, and the step-up transformer layer is made up of several step-up transformers, wherein, institute
Inverter is stated to connect one to one with step-up transformer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621451686.7U CN206364767U (en) | 2016-12-28 | 2016-12-28 | A kind of novel large photovoltaic plant inversion system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621451686.7U CN206364767U (en) | 2016-12-28 | 2016-12-28 | A kind of novel large photovoltaic plant inversion system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206364767U true CN206364767U (en) | 2017-07-28 |
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ID=59376278
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621451686.7U Expired - Fee Related CN206364767U (en) | 2016-12-28 | 2016-12-28 | A kind of novel large photovoltaic plant inversion system |
Country Status (1)
| Country | Link |
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| CN (1) | CN206364767U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110492453A (en) * | 2019-09-11 | 2019-11-22 | 阳光电源股份有限公司 | A kind of energy-storage system and its multistage short circuit protection system |
-
2016
- 2016-12-28 CN CN201621451686.7U patent/CN206364767U/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110492453A (en) * | 2019-09-11 | 2019-11-22 | 阳光电源股份有限公司 | A kind of energy-storage system and its multistage short circuit protection system |
| US11342752B2 (en) | 2019-09-11 | 2022-05-24 | Sungrow Power Supply Co., Ltd. | Energy storage system and multi-stage short circuit protection system thereof |
| CN110492453B (en) * | 2019-09-11 | 2023-01-06 | 阳光电源股份有限公司 | Energy storage system and multistage short-circuit protection system thereof |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170728 Termination date: 20181228 |
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| CF01 | Termination of patent right due to non-payment of annual fee |