CN104659803A - Photovoltaic networking system device - Google Patents
Photovoltaic networking system device Download PDFInfo
- Publication number
- CN104659803A CN104659803A CN201310572696.0A CN201310572696A CN104659803A CN 104659803 A CN104659803 A CN 104659803A CN 201310572696 A CN201310572696 A CN 201310572696A CN 104659803 A CN104659803 A CN 104659803A
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- voltage
- inverter
- resistance
- photovoltaic
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- 230000006855 networking Effects 0.000 title claims abstract description 37
- 238000005070 sampling Methods 0.000 claims abstract description 21
- 229910000831 Steel Inorganic materials 0.000 description 5
- 239000010959 steel Substances 0.000 description 5
- NJPPVKZQTLUDBO-UHFFFAOYSA-N novaluron Chemical compound C1=C(Cl)C(OC(F)(F)C(OC(F)(F)F)F)=CC=C1NC(=O)NC(=O)C1=C(F)C=CC=C1F NJPPVKZQTLUDBO-UHFFFAOYSA-N 0.000 description 2
- 238000010586 diagram Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000013082 photovoltaic technology Methods 0.000 description 1
Classifications
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- H02J3/385—
-
- 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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- Inverter Devices (AREA)
Abstract
The invention discloses a photovoltaic networking system device comprising a solar cell connected with a power grid through a networking inverter. A driving circuit of the networking inverter is connected to a DSP (digital signal processor). A DC-side voltage and current sampling module and an AC-side voltage and current sampling module are respectively arranged at the DC side and the AC side of the networking inverter. Output ends of the DC-side voltage and current sampling module and the AC-side voltage and current sampling module are respectively connected to output ends of the DSP (digital signal processor). The DSP (digital signal processor) adopts a MPPT (maximum power point tracking) algorithm to control the output voltage and current of the solar cell through the networking inverter, and adopts a digital phase locked loop algorithm to control the output current of the networking inverter and the voltage of the power grid to be of the same frequency and same phase. The photovoltaic networking system device of the invention is a single-stage solar photovoltaic networking system device, has a simple structure, uses a smaller number of hardware pieces, has a lower failure rate, and is lower in cost.
Description
Technical field
The present invention relates to field of photovoltaic technology, particularly a kind of photovoltaic networked system device.
Background technology
The fixed form on existing photovoltaic module and roof comprises the color steel be suddenly attached to by the pedestal of photovoltaic module on roof, then is fixed on roof color steel by bolt by pedestal; Or color steel fluting directly on roof or bolt is penetrated color steel fix.Such fixed form not only can destroy color steel, affects the globality on roof, also can cause the hidden danger that roof leaks.
Summary of the invention
The object of this invention is to provide a kind of photovoltaic networked system device.
A kind of photovoltaic networked system device, comprise the solar cell being connected electrical network by networking inverter, the drive circuit of described networking inverter is connected to DSP, it is characterized in that: the DC side of described combining inverter and AC are respectively equipped with DC voltage current sample module and AC electric current and voltage sampling module, the output of described DC voltage current sample module and AC electric current and voltage sampling module is connected to the output of DSP respectively, described DSP adopts MPPT MPPT maximum power point tracking algorithm by the output voltage of networking inverter control solar cell, electric current, and adopt digital phase-locked loop algorithm to control output current and the same homophase frequently of line voltage of combining inverter.
Photovoltaic networked system device as claimed in claim 1, it is characterized in that: described solar cell output connects combining inverter by DC side EMC filter, and described DC voltage current sample model calling is between solar cell output and DC side EMC filter input end.
Photovoltaic networked system device as claimed in claim 1 or 2, it is characterized in that: described DC voltage current sample module comprises the voltage sample module be parallel between solar cell the two poles of the earth, and is series at the direct current Hall element of solar cell negative pole.
Photovoltaic networked system device as claimed in claim 1, it is characterized in that: the output of described networking inverter is connected electrical network by transformer with AC EMC filter successively, described AC electric current and voltage sampling module comprises and is series at inverter current Hall element between the networking output of inverter and transformer, is parallel to transformer and inputs inverter voltage instrument transformer between the two poles of the earth, be parallel to AC EMC filter and input line voltage instrument transformer between the two poles of the earth.
Photovoltaic networked system device as claimed in claim 1, is characterized in that: the two poles of the earth of described solar cell are connected to piezo-resistance ZR1, piezo-resistance ZR2, through resistance R1 ground connection after the other end parallel connection of described piezo-resistance ZR1 and piezo-resistance ZR2.
Photovoltaic networked system device as claimed in claim 1, is characterized in that: the two poles of the earth of described electrical network are connected to piezo-resistance ZR3, piezo-resistance ZR4, through resistance R2 ground connection after the other end parallel connection of described piezo-resistance ZR3 and piezo-resistance ZR4.
Advantage of the present invention:
The present invention is a kind of photovoltaic networked system device, and system configuration is simple, and hardware quantity used reduces, and reduces the failure rate of system, has saved cost simultaneously.
Accompanying drawing explanation
Below in conjunction with drawings and the embodiments, the present invention is further detailed explanation.
Fig. 1 is photovoltaic networked system apparatus structure schematic diagram.
Embodiment
Embodiment 1
A kind of photovoltaic networked system device, comprise the solar cell being connected electrical network by networking inverter, the drive circuit of described networking inverter is connected to DSP, it is characterized in that: the DC side of described combining inverter and AC are respectively equipped with DC voltage current sample module and AC electric current and voltage sampling module, the output of described DC voltage current sample module and AC electric current and voltage sampling module is connected to the output of DSP respectively, described DSP adopts MPPT MPPT maximum power point tracking algorithm by the output voltage of networking inverter control solar cell, electric current, and adopt digital phase-locked loop algorithm to control output current and the same homophase frequently of line voltage of combining inverter.
Photovoltaic networked system device as claimed in claim 1, it is characterized in that: described solar cell output connects combining inverter by DC side EMC filter, and described DC voltage current sample model calling is between solar cell output and DC side EMC filter input end.
Photovoltaic networked system device as claimed in claim 1 or 2, it is characterized in that: described DC voltage current sample module comprises the voltage sample module be parallel between solar cell the two poles of the earth, and is series at the direct current Hall element of solar cell negative pole.
Photovoltaic networked system device as claimed in claim 1, it is characterized in that: the output of described networking inverter is connected electrical network by transformer with AC EMC filter successively, described AC electric current and voltage sampling module comprises and is series at inverter current Hall element between the networking output of inverter and transformer, is parallel to transformer and inputs inverter voltage instrument transformer between the two poles of the earth, be parallel to AC EMC filter and input line voltage instrument transformer between the two poles of the earth.
Photovoltaic networked system device as claimed in claim 1, is characterized in that: the two poles of the earth of described solar cell are connected to piezo-resistance ZR1, piezo-resistance ZR2, through resistance R1 ground connection after the other end parallel connection of described piezo-resistance ZR1 and piezo-resistance ZR2.
Photovoltaic networked system device as claimed in claim 1, is characterized in that: the two poles of the earth of described electrical network are connected to piezo-resistance ZR3, piezo-resistance ZR4, through resistance R2 ground connection after the other end parallel connection of described piezo-resistance ZR3 and piezo-resistance ZR4.
Embodiment 2
A kind of photovoltaic networked system device, comprise the solar cell being connected electrical network by networking inverter, the drive circuit of described networking inverter is connected to DSP, it is characterized in that: the DC side of described combining inverter and AC are respectively equipped with DC voltage current sample module and AC electric current and voltage sampling module, the output of described DC voltage current sample module and AC electric current and voltage sampling module is connected to the output of DSP respectively, described DSP adopts MPPT MPPT maximum power point tracking algorithm by the output voltage of networking inverter control solar cell, electric current, and adopt digital phase-locked loop algorithm to control output current and the same homophase frequently of line voltage of combining inverter.
Photovoltaic networked system device as claimed in claim 1, it is characterized in that: described solar cell output connects combining inverter by DC side EMC filter, and described DC voltage current sample model calling is between solar cell output and DC side EMC filter input end.
Photovoltaic networked system device as claimed in claim 1 or 2, it is characterized in that: described DC voltage current sample module comprises the voltage sample module be parallel between solar cell the two poles of the earth, and is series at the direct current Hall element of solar cell negative pole.
Photovoltaic networked system device as claimed in claim 1, it is characterized in that: the output of described networking inverter is connected electrical network by transformer with AC EMC filter successively, described AC electric current and voltage sampling module comprises and is series at inverter current Hall element between the networking output of inverter and transformer, is parallel to transformer and inputs inverter voltage instrument transformer between the two poles of the earth, be parallel to AC EMC filter and input line voltage instrument transformer between the two poles of the earth.
Embodiment 3
A kind of photovoltaic networked system device, comprise the solar cell being connected electrical network by networking inverter, the drive circuit of described networking inverter is connected to DSP, it is characterized in that: the DC side of described combining inverter and AC are respectively equipped with DC voltage current sample module and AC electric current and voltage sampling module, the output of described DC voltage current sample module and AC electric current and voltage sampling module is connected to the output of DSP respectively, described DSP adopts MPPT MPPT maximum power point tracking algorithm by the output voltage of networking inverter control solar cell, electric current, and adopt digital phase-locked loop algorithm to control output current and the same homophase frequently of line voltage of combining inverter.
Photovoltaic networked system device as claimed in claim 1, it is characterized in that: described solar cell output connects combining inverter by DC side EMC filter, and described DC voltage current sample model calling is between solar cell output and DC side EMC filter input end.
Photovoltaic networked system device as claimed in claim 1 or 2, it is characterized in that: described DC voltage current sample module comprises the voltage sample module be parallel between solar cell the two poles of the earth, and is series at the direct current Hall element of solar cell negative pole.
Embodiment 4
A kind of photovoltaic networked system device, comprise the solar cell being connected electrical network by networking inverter, the drive circuit of described networking inverter is connected to DSP, it is characterized in that: the DC side of described combining inverter and AC are respectively equipped with DC voltage current sample module and AC electric current and voltage sampling module, the output of described DC voltage current sample module and AC electric current and voltage sampling module is connected to the output of DSP respectively, described DSP adopts MPPT MPPT maximum power point tracking algorithm by the output voltage of networking inverter control solar cell, electric current, and adopt digital phase-locked loop algorithm to control output current and the same homophase frequently of line voltage of combining inverter.
Photovoltaic networked system device as claimed in claim 1, it is characterized in that: described solar cell output connects combining inverter by DC side EMC filter, and described DC voltage current sample model calling is between solar cell output and DC side EMC filter input end.
Photovoltaic networked system device as claimed in claim 1 or 2, it is characterized in that: described DC voltage current sample module comprises the voltage sample module be parallel between solar cell the two poles of the earth, and is series at the direct current Hall element of solar cell negative pole.
Photovoltaic networked system device as claimed in claim 1, it is characterized in that: the output of described networking inverter is connected electrical network by transformer with AC EMC filter successively, described AC electric current and voltage sampling module comprises and is series at inverter current Hall element between the networking output of inverter and transformer, is parallel to transformer and inputs inverter voltage instrument transformer between the two poles of the earth, be parallel to AC EMC filter and input line voltage instrument transformer between the two poles of the earth.
Photovoltaic networked system device as claimed in claim 1, is characterized in that: the two poles of the earth of described electrical network are connected to piezo-resistance ZR3, piezo-resistance ZR4, through resistance R2 ground connection after the other end parallel connection of described piezo-resistance ZR3 and piezo-resistance ZR4.
Claims (6)
1. a photovoltaic networked system device, comprise the solar cell being connected electrical network by networking inverter, the drive circuit of described networking inverter is connected to DSP, it is characterized in that: the DC side of described combining inverter and AC are respectively equipped with DC voltage current sample module and AC electric current and voltage sampling module, the output of described DC voltage current sample module and AC electric current and voltage sampling module is connected to the output of DSP respectively, described DSP adopts MPPT MPPT maximum power point tracking algorithm by the output voltage of networking inverter control solar cell, electric current, and adopt digital phase-locked loop algorithm to control output current and the same homophase frequently of line voltage of combining inverter.
2. photovoltaic networked system device as claimed in claim 1, it is characterized in that: described solar cell output connects combining inverter by DC side EMC filter, and described DC voltage current sample model calling is between solar cell output and DC side EMC filter input end.
3. photovoltaic networked system device as claimed in claim 1 or 2, it is characterized in that: described DC voltage current sample module comprises the voltage sample module be parallel between solar cell the two poles of the earth, and is series at the direct current Hall element of solar cell negative pole.
4. photovoltaic networked system device as claimed in claim 1, it is characterized in that: the output of described networking inverter is connected electrical network by transformer with AC EMC filter successively, described AC electric current and voltage sampling module comprises and is series at inverter current Hall element between the networking output of inverter and transformer, is parallel to transformer and inputs inverter voltage instrument transformer between the two poles of the earth, be parallel to AC EMC filter and input line voltage instrument transformer between the two poles of the earth.
5. photovoltaic networked system device as claimed in claim 1, is characterized in that: the two poles of the earth of described solar cell are connected to piezo-resistance ZR1, piezo-resistance ZR2, through resistance R1 ground connection after the other end parallel connection of described piezo-resistance ZR1 and piezo-resistance ZR2.
6. photovoltaic networked system device as claimed in claim 1, is characterized in that: the two poles of the earth of described electrical network are connected to piezo-resistance ZR3, piezo-resistance ZR4, through resistance R2 ground connection after the other end parallel connection of described piezo-resistance ZR3 and piezo-resistance ZR4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310572696.0A CN104659803A (en) | 2013-11-18 | 2013-11-18 | Photovoltaic networking system device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310572696.0A CN104659803A (en) | 2013-11-18 | 2013-11-18 | Photovoltaic networking system device |
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| Publication Number | Publication Date |
|---|---|
| CN104659803A true CN104659803A (en) | 2015-05-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310572696.0A Pending CN104659803A (en) | 2013-11-18 | 2013-11-18 | Photovoltaic networking system device |
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| CN (1) | CN104659803A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110736924A (en) * | 2019-11-12 | 2020-01-31 | 爱士惟新能源技术(江苏)有限公司 | Relay sampling detection circuit and method for grid-connected inverters |
| CN112600455A (en) * | 2020-12-07 | 2021-04-02 | 昱能科技股份有限公司 | Power supply system and solar photovoltaic inverter |
-
2013
- 2013-11-18 CN CN201310572696.0A patent/CN104659803A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110736924A (en) * | 2019-11-12 | 2020-01-31 | 爱士惟新能源技术(江苏)有限公司 | Relay sampling detection circuit and method for grid-connected inverters |
| CN112600455A (en) * | 2020-12-07 | 2021-04-02 | 昱能科技股份有限公司 | Power supply system and solar photovoltaic inverter |
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Application publication date: 20150527 |