CN202455093U - Reverse power protection system of photovoltaic grid-connected inverter - Google Patents
Reverse power protection system of photovoltaic grid-connected inverter Download PDFInfo
- Publication number
- CN202455093U CN202455093U CN2012200431193U CN201220043119U CN202455093U CN 202455093 U CN202455093 U CN 202455093U CN 2012200431193 U CN2012200431193 U CN 2012200431193U CN 201220043119 U CN201220043119 U CN 201220043119U CN 202455093 U CN202455093 U CN 202455093U
- Authority
- CN
- China
- Prior art keywords
- current
- load
- combining inverter
- photovoltaic combining
- protection system
- 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
Images
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
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Landscapes
- Inverter Devices (AREA)
- Supply And Distribution Of Alternating Current (AREA)
Abstract
The utility model discloses a reverse power protection system of a photovoltaic grid-connected inverter. Current data at the front end of a load is collected by a current sensor and the size of current on the load is obtained by calculating; the load current is compared with the output current of the photovoltaic grid-connected inverter and the size of the output current of the photovoltaic grid-connected inverter is adjusted according to the size relation between the load current and the output current of the photovoltaic grid-connected inverter; and when the output power of the photovoltaic grid-connected inverter is not enough and the needed power of the normal work of the load is met, the residual part can be automatically supplemented by a power grid, so as to guarantee the normal work of the load.
Description
Technical field
The utility model relates to a kind of new forms of energy power domain equipment, is specifically related to a kind of reverse power protection system of photovoltaic combining inverter of field of solar thermal power generation.
Background technology
At present, new forms of energy have obtained development fast in the worldwide, wherein the solar power generation in the regenerative resource also develop very fast, a lot of countries have issued subsidy policy, encourage the common people to use new forms of energy such as solar energy to generate electricity.But because at present the photovoltaic combining inverter technology also is not very ripe, when being connected to the grid a constant volume, can producing electrical network and disturb and harmonic pollution, therefore many in the world countries temporarily also do not ratify solar inverter and can be connected to the grid.
When the inverse probability that is incorporated into the power networks is meant the dump power that solar inverter produces this electric energy is sent into utility grid, owing to be in the opposite direction with mains-supplied, so be called inverse probability.When power shortage that photovoltaic combining inverter produces, then supply power by civil power.At present, the power department of a lot of countries is worried can cause instability and produce harmonic pollution utility grid after photovoltaic combining inverter is incorporated civil power into, and the electric weight that photovoltaic combining inverter produced simultaneously can not be dispatched.Therefore, can photovoltaic combining inverter be incorporated utility grid into and become one of the major issue of some areas restrictions solar energy development present stage.At present, press for the protection system of integrated inverse probability in photovoltaic combining inverter, like this, when photovoltaic combining inverter when producing dump energy, can prevent that these energy from flowing into electrical network.
Summary of the invention
The utility model purpose is to provide a kind of reverse power protection system of photovoltaic combining inverter; Its dump energy that can guarantee that not only photovoltaic combining inverter produces can not flow into electrical network, can also when the electric energy deficiency that photovoltaic combining inverter produced, call in electric energy from electrical network and replenish.
In order to solve these problems of the prior art, the technical scheme that the utility model provides is:
A kind of reverse power protection system of photovoltaic combining inverter; Said reverse power protection system comprises current-voltage conversion circuit, current sensor, processor controls and load; Said current-voltage conversion circuit, processor controls are integrated in the photovoltaic combining inverter; Said current sensor is located at before the load input terminal; The output current of said current sensor inserts photovoltaic combining inverter, the current output terminal of photovoltaic combining inverter and the access load afterwards of connect with current sensor again after electrical network links to each other, and the input of described photovoltaic combining inverter links to each other with solar panel.
As replenishing, said processor controls is dsp processor or MCU processor or arm processor, and said current sensor both can adopt the current-output type current sensor, also can adopt voltage output type current sensor.
The utility model obtains the current signal of the input current of load input terminal through the current sensor sampling; After this signal is delivered to photovoltaic combining inverter; Through current-voltage conversion circuit this current signal is converted to voltage signal and sends processor controls to; Processor controls is through calculating the load current that can draw load end; The electric current that resulting load current value and inverter are exported to load compares, and when inverter output current during greater than the required electric current of load, reduces the power output of inverter; When inverter output current during less than the required electric current of load; Then increase the power output of inverter, at this moment, if when the required power of load surpasses the peak power output of photovoltaic DC-to-AC converter; Photovoltaic combining inverter operates in maximum power, and rest parts is replenished by electrical network automatically.
Than solution of the prior art, the utility model advantage is:
The utility model is gathered the current data of load front end and then is calculated the size of current in the load through current sensor; Load current is compared with the output current of photovoltaic combining inverter; Regulate the output current size of photovoltaic combining inverter according to the magnitude relationship between the output current of load current and photovoltaic combining inverter; And when the photovoltaic combining inverter power output is not enough to satisfy load operate as normal power demand; Rest parts can be replenished by electrical network automatically, has guaranteed the operate as normal of load, in addition.
Description of drawings
Below in conjunction with accompanying drawing and embodiment the utility model is further described:
Fig. 1 is a kind of structural representation of the utility model;
Fig. 2 is the workflow sketch map of the utility model.
Embodiment
Below in conjunction with specific embodiment such scheme is further specified.Should be understood that these embodiment are used to the present invention is described and are not limited to limit scope of the present invention.The implementation condition that adopts among the embodiment can be done further adjustment according to the condition of concrete producer, and not marked implementation condition is generally the condition in the normal experiment.
Embodiment:
Present embodiment has been described a kind of reverse power protection system of photovoltaic combining inverter; Its structured flowchart is as shown in Figure 1; Said reverse power protection system comprises current-voltage conversion circuit, current-output type current sensor, dsp processor and load; Said current-voltage conversion circuit, dsp processor are integrated in the photovoltaic combining inverter; Said current-output type current sensor is located at before the load input terminal; The output current of said current sensor inserts photovoltaic combining inverter, the current output terminal of photovoltaic combining inverter and the access load afterwards of connect with current sensor again after electrical network links to each other, and the input of described photovoltaic combining inverter links to each other with solar panel.
The workflow of the described reverse power protection of present embodiment system is as shown in Figure 2, obtains the input current I of load input terminal through the current sensor sampling
s, this current signal I
sAfter delivering to photovoltaic combining inverter, through current-voltage conversion circuit with this current signal I
sConvert voltage signal V to
sAnd send dsp processor to, dsp processor is through calculating the load current I that can draw load end
b, with resulting load current value I
bThe electric current I of exporting to load with inverter
aCompare, as inverter output current I
aGreater than the required electric current I of load
bThe time, the power output of reduction inverter; As inverter output current I
aLess than the required electric current I of load
bThe time, then improve the power output of inverter.At this moment, if when the required power of load surpasses the peak power output of photovoltaic DC-to-AC converter, photovoltaic combining inverter operates in maximum power, and rest parts is replenished by electrical network automatically.
Above-mentioned instance only is explanation technical conceive of the present invention and characteristics, and its purpose is to let the people who is familiar with this technology can understand content of the present invention and enforcement according to this, can not limit protection scope of the present invention with this.All equivalent transformations that spirit is done according to the present invention or modification all should be encompassed within protection scope of the present invention.
Claims (4)
1. the reverse power protection system of a photovoltaic combining inverter; It is characterized in that; Said reverse power protection system comprises current-voltage conversion circuit, current sensor, processor controls and load; Said current-voltage conversion circuit, processor controls are integrated in the photovoltaic combining inverter; Said current sensor is located at before the load input terminal, and the output current of said current sensor inserts photovoltaic combining inverter, the current output terminal of photovoltaic combining inverter and the access load afterwards of connect with current sensor again after electrical network links to each other.
2. the reverse power protection system of a kind of photovoltaic combining inverter according to claim 1 is characterized in that, the input of described photovoltaic combining inverter links to each other with solar panel.
3. the reverse power protection system of a kind of photovoltaic combining inverter according to claim 1 is characterized in that, said processor controls is dsp processor or MCU processor or arm processor.
4. the reverse power protection system of a kind of photovoltaic combining inverter according to claim 1 is characterized in that, said current sensor both can adopt the current-output type current sensor, also can adopt voltage output type current sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200431193U CN202455093U (en) | 2012-02-10 | 2012-02-10 | Reverse power protection system of photovoltaic grid-connected inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200431193U CN202455093U (en) | 2012-02-10 | 2012-02-10 | Reverse power protection system of photovoltaic grid-connected inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202455093U true CN202455093U (en) | 2012-09-26 |
Family
ID=46870923
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2012200431193U Expired - Fee Related CN202455093U (en) | 2012-02-10 | 2012-02-10 | Reverse power protection system of photovoltaic grid-connected inverter |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202455093U (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103107556A (en) * | 2013-01-18 | 2013-05-15 | 深圳市英威腾电气股份有限公司 | Inverter energy adjustment method, inverter and inverter energy adjustment system |
| CN104518694A (en) * | 2013-09-26 | 2015-04-15 | 台达电子工业股份有限公司 | Micro inverter of solar power generation system, and operation method thereof |
| CN107104464A (en) * | 2016-02-22 | 2017-08-29 | 珠海格力电器股份有限公司 | Photovoltaic air conditioner control device and method, photovoltaic air conditioner and power distribution system |
| CN111585347A (en) * | 2020-05-26 | 2020-08-25 | 青海绿能数据有限公司 | New forms of energy electric power safety intelligence control system |
-
2012
- 2012-02-10 CN CN2012200431193U patent/CN202455093U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103107556A (en) * | 2013-01-18 | 2013-05-15 | 深圳市英威腾电气股份有限公司 | Inverter energy adjustment method, inverter and inverter energy adjustment system |
| CN103107556B (en) * | 2013-01-18 | 2016-01-06 | 深圳市英威腾电气股份有限公司 | The energy adjusting method of inverter, inverter and energy adjustment system thereof |
| CN104518694A (en) * | 2013-09-26 | 2015-04-15 | 台达电子工业股份有限公司 | Micro inverter of solar power generation system, and operation method thereof |
| CN107104464A (en) * | 2016-02-22 | 2017-08-29 | 珠海格力电器股份有限公司 | Photovoltaic air conditioner control device and method, photovoltaic air conditioner and power distribution system |
| CN111585347A (en) * | 2020-05-26 | 2020-08-25 | 青海绿能数据有限公司 | New forms of energy electric power safety intelligence control system |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| WO2011113219A1 (en) | Grid-connected wind-photovoltaic hybrid power generation system and power generation method thereof | |
| CN101710716A (en) | Grid-connected inverter capable of reducing electrolytic capacitance | |
| CN108123497B (en) | Power distribution cabinet for AC/DC hybrid power supply and AC/DC hybrid power supply system | |
| CN105281368A (en) | Photovoltaic grid-connected and electric energy quality management unified control strategy | |
| CN204179989U (en) | Based on the scene oil complementary power generation system of DC bus | |
| CN105552952A (en) | Photovoltaic-energy storage hybrid power generation system and energy management method therefor | |
| CN202455093U (en) | Reverse power protection system of photovoltaic grid-connected inverter | |
| CN105932716A (en) | Power supply system of distributed type power source | |
| CN109193803A (en) | Multiple-energy-source intelligent control integratedization system and multiple-energy-source intelligent control method | |
| CN104242790A (en) | Wind-solar hybrid power generation system | |
| CN201865851U (en) | Power generation system with a plurality of energy resources | |
| CN101719677B (en) | Control unit for zero counter current network integrating control device | |
| CN103812140A (en) | Wind energy, solar energy and commercial power complementary electric vehicle charging system | |
| CN102868181A (en) | Anti-backflow method and device for grid-connected power generation system | |
| CN103138282A (en) | Reverse power protection system of photovoltaic grid-connected inverter | |
| CN204205617U (en) | A kind of power conversion is generated electricity by way of merging two or more grid systems electric power system | |
| CN202513586U (en) | Intelligent micro-grid using renewable energy for generating power | |
| CN204334028U (en) | A kind of wind energy photovoltaic generation is from net power supply charging system for electric automobile | |
| CN203722249U (en) | Distributed photovoltaic grid-connected power generation system | |
| CN106058935A (en) | Distributed type wind and optical energy storing and charging integrated micro power grid system | |
| CN202978320U (en) | Wind energy, solar energy and commercial power complementary electric vehicle charging station | |
| CN202260536U (en) | Controlling device for emergency power supply car power supply system | |
| CN102477949A (en) | Multi-energy generating system | |
| CN205377369U (en) | Electric automobile battery charge and discharge based on photovoltaic array and energy storage unit | |
| CN109599898B (en) | Control method and device for improving consumption of distributed power supply |
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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120926 Termination date: 20200210 |