CN202564967U - Single-stage grid-connected inverter system for photovoltaic power generation - Google Patents
Single-stage grid-connected inverter system for photovoltaic power generation Download PDFInfo
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- CN202564967U CN202564967U CN2012201462606U CN201220146260U CN202564967U CN 202564967 U CN202564967 U CN 202564967U CN 2012201462606 U CN2012201462606 U CN 2012201462606U CN 201220146260 U CN201220146260 U CN 201220146260U CN 202564967 U CN202564967 U CN 202564967U
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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 a single-stage grid-connected inverter system for photovoltaic power generation, whose direct current side is connected with a photovoltaic battery and alternate current side is connected with power grid. The said system comprises a main circuit and a control circuit, wherein the main circuit comprises a capacitor, an inverter, an inductor and a transformer; and the control circuit comprises an MPPT module, an SPWM module, an inversion control module, a first current/voltage transformer, and a second current/voltage transformer. With such structure, the utility model can effectively enhance system stability and reliability, improves system efficiency, reduces cost and saves volume.
Description
Technical field
The utility model relates to a kind of single-stage combining inverter system that is used for photovoltaic generation.
Background technology
Along with development of modern industry, global energy crisis and atmosphere polluting problem become increasingly conspicuous, and traditional fuel energy reduces day by day, and the harm that environment is caused becomes increasingly conspicuous, and the whole world has 2,000,000,000 people to can not get normal energy supply approximately.Seek new regenerative resource, change human energy resource structure, keep long-range sustainable development, become the focus that people pay attention to.Photovoltaic is the most wide a kind of of application prospect in the various new forms of energy, and photovoltaic generation will substitute oil and coal becomes one of human following main energy form.
Owing to the restriction of present stage scientific and technological level, the conversion efficiency of solar-energy photo-voltaic cell is lower all the time, under Limited resources, how to improve the key that generating efficiency is a present stage photovoltaic combining inverter system to greatest extent.
Solar photovoltaic interconnected inverter of the prior art system is through Realization of Analog Circuit, function singleness, and accuracy rate is low, and the photovoltaic combining inverter system capacity conversion progression of traditional two-stage type or multistage is many, and conversion efficiency is low, and cost is high.
Summary of the invention
The purpose of the utility model is to overcome the defective of prior art and a kind of single-stage combining inverter system that is used for photovoltaic generation is provided, and solving has existing photovoltaic combining inverter energy conversion progression many, and conversion efficiency is low, the problem that cost is high.
The purpose of the utility model is achieved in that
A kind of single-stage combining inverter system that is used for photovoltaic generation of the utility model, the DC side of this inverter system links to each other with photovoltaic cell, and its AC side links to each other with electrical network, and it comprises main circuit and control circuit, wherein,
Described main circuit comprises electric capacity, inverter, inductance and transformer; The direct-flow input end of described inverter links to each other with described photovoltaic cell; Described electric capacity is located between described inverter and the photovoltaic cell, and the interchange outlet side of described inverter links to each other with electrical network with transformer through the inductance of series connection successively;
Described control circuit comprises MPPT module, SPWM module, inversion control module, first current-voltage transformer and second current-voltage transformer; Described first current-voltage transformer is located between described photovoltaic cell and the electric capacity; The signal input part of described MPPT module is connected with the output of described first current-voltage transformer; Described second current-voltage transformer is provided with between described inductance and the transformer; First signal input part of described inversion control module is connected with the output of described second current-voltage transformer; The output of said MPPT module links to each other with the secondary signal input of described inversion control module; The output of described inversion control module links to each other with described SPWM module input, and the output of described SPWM module links to each other with the signal input part of described inverter.
The utility model has adopted the main circuit and the control circuit of single stage type structure, and effectively the stability of enhanced system, reliability improve system effectiveness, have saved volume when reducing cost.
Description of drawings
Fig. 1 is the schematic diagram of the utility model.
Embodiment
To combine accompanying drawing that the utility model is described further below.
See also Fig. 1, the single-stage combining inverter system that the utility model is used for photovoltaic generation has been shown among the figure, the DC side of this inverter system links to each other with photovoltaic cell 3, and its AC side links to each other with electrical network, and it comprises main circuit 1 and control circuit 2, wherein,
Main circuit 1 comprises capacitor C, inverter 11, inductance L and transformer T; The direct-flow input end of inverter 11 links to each other with photovoltaic cell 3; Capacitor C is located between inverter 11 and the photovoltaic cell 3, and the interchange outlet side of inverter 11 links to each other with electrical network with transformer T through the inductance L of series connection successively;
Control circuit 2 comprises MPPT module 21, SPWM module 22, inversion control module 23, first current-voltage transformer 24 and second current-voltage transformer 25; First current-voltage transformer 24 is located between photovoltaic cell 3 and the capacitor C; The signal input part of MPPT module 21 is connected with the output of first current-voltage transformer 24; Second current-voltage transformer 25 is provided with between inductance L and the transformer T; First signal input part of inversion control module 23 is connected with the output of second current-voltage transformer 25; The output of MPPT module 21 links to each other with the secondary signal input of inversion control module 23, and the output of inversion control module 23 links to each other with SPWM module 22 inputs, and the output of SPWM module 22 links to each other with the signal input part of inverter 11.
The utility model inverter system has adopted the main circuit and the control circuit of single stage type structure, and effectively the stability of enhanced system, reliability improve system effectiveness, have saved volume when reducing cost.
Above embodiment only supplies to explain the usefulness of the utility model; But not to the restriction of the utility model; The technical staff in relevant technologies field under the situation of spirit that does not break away from the utility model and scope, can also make various conversion or modification; Therefore all technical schemes that are equal to also should belong to the category of the utility model, should be limited each claim.
Claims (1)
1. single-stage combining inverter system that is used for photovoltaic generation, the DC side of this inverter system links to each other with photovoltaic cell, and its AC side links to each other with electrical network, it is characterized in that, and it comprises main circuit and control circuit, wherein,
Described main circuit comprises electric capacity, inverter, inductance and transformer; The direct-flow input end of described inverter links to each other with described photovoltaic cell; Described electric capacity is located between described inverter and the photovoltaic cell, and the interchange outlet side of described inverter links to each other with electrical network with transformer through the inductance of series connection successively;
Described control circuit comprises MPPT module, SPWM module, inversion control module, first current-voltage transformer and second current-voltage transformer; Described first current-voltage transformer is located between described photovoltaic cell and the electric capacity; The signal input part of described MPPT module is connected with the output of described first current-voltage transformer; Described second current-voltage transformer is provided with between described inductance and the transformer; First signal input part of described inversion control module is connected with the output of described second current-voltage transformer; The output of said MPPT module links to each other with the secondary signal input of described inversion control module; The output of described inversion control module links to each other with described SPWM module input, and the output of described SPWM module links to each other with the signal input part of described inverter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201462606U CN202564967U (en) | 2012-03-31 | 2012-03-31 | Single-stage grid-connected inverter system for photovoltaic power generation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012201462606U CN202564967U (en) | 2012-03-31 | 2012-03-31 | Single-stage grid-connected inverter system for photovoltaic power generation |
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| Publication Number | Publication Date |
|---|---|
| CN202564967U true CN202564967U (en) | 2012-11-28 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012201462606U Expired - Lifetime CN202564967U (en) | 2012-03-31 | 2012-03-31 | Single-stage grid-connected inverter system for photovoltaic power generation |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103490446A (en) * | 2013-09-24 | 2014-01-01 | 许继集团有限公司 | Operational control method for photovoltaic inverter |
| CN103730911A (en) * | 2013-12-25 | 2014-04-16 | 常熟开关制造有限公司(原常熟开关厂） | Grid connection method of photovoltaic grid connection inverter and photovoltaic grid connection power generating system |
-
2012
- 2012-03-31 CN CN2012201462606U patent/CN202564967U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103490446A (en) * | 2013-09-24 | 2014-01-01 | 许继集团有限公司 | Operational control method for photovoltaic inverter |
| CN103730911A (en) * | 2013-12-25 | 2014-04-16 | 常熟开关制造有限公司(原常熟开关厂） | Grid connection method of photovoltaic grid connection inverter and photovoltaic grid connection power generating system |
| CN103730911B (en) * | 2013-12-25 | 2015-08-19 | 常熟开关制造有限公司(原常熟开关厂） | The grid-connected control method of photovoltaic combining inverter and grid-connected photovoltaic system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20121128 |
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| CX01 | Expiry of patent term |