CN203056605U - Low-power photovoltaic inverter low voltage ride through circuit - Google Patents
Low-power photovoltaic inverter low voltage ride through circuit Download PDFInfo
- Publication number
- CN203056605U CN203056605U CN2013200174377U CN201320017437U CN203056605U CN 203056605 U CN203056605 U CN 203056605U CN 2013200174377 U CN2013200174377 U CN 2013200174377U CN 201320017437 U CN201320017437 U CN 201320017437U CN 203056605 U CN203056605 U CN 203056605U
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- China
- Prior art keywords
- photovoltaic
- diode
- converter
- rectification module
- super capacitor
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- 239000003990 capacitor Substances 0.000 claims abstract description 23
- 238000000034 method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 238000005286 illumination Methods 0.000 description 1
- 230000035699 permeability Effects 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 238000005728 strengthening Methods 0.000 description 1
Classifications
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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 low-power photovoltaic inverter low voltage ride through circuit, comprising a rectification module, a current-limiting resistor R1, a super capacitor C1, a diode ID7, a diode IIID 8, a photovoltaic inverter grid-connection end J1, a photovoltaic inverter contact coil J2 and a diode IID9. The photovoltaic inverter grid-connection end J1 is connected with the rectification module, the anode of the rectification module is connected with the positive end of the photovoltaic inverter contact coil J2, the cathode of the rectification module is connected with the anode of the super capacitor C1 through the current-limiting resistor R1 and the diode IID9, the cathode of the rectification module is connected with the negative end of the photovoltaic inverter contact coil J2 and is also connected with the cathode of the cathode of the super capacitor, the anode of the super capacitor C1 is connected with the diode ID7 in series and is further connected with the positive end of the photovoltaic inverter contact coil J2 in parallel, and the negative end of the photovoltaic inverter contact coil J2 is connected with the cathode of the super capacitor C1. The photovoltaic inverter low voltage ride through circuit is steady in work, high in reliability and low in cost.
Description
Technical field
The utility model relates to a kind of circuit that low-voltage is passed through of realizing in small-power photovoltaic generation process, particularly a kind of small-power photovoltaic inversion low-voltage is passed through circuit.
Background technology
Higher or exert oneself when strengthening when low profile photovoltaic electric power system permeability, circuit breaks down and causes tripping operation, because fault recovery photovoltaic circuit needs the time, the power shortage that causes during this period will cause tripping operation, thereby cause power failure, influence circuit safety stable operation.Therefore, need carry out the research of photovoltaic plant low-voltage crossing technology, ensure the stable operation of photovoltaic circuit safety.
Summary of the invention
The purpose of this utility model provides a kind of small-power photovoltaic inversion low-voltage and passes through circuit, to solve in the small-power photovoltaic generation process because the voltage that problems such as weather, intensity of illumination, equipment fault cause falls problem.
The utility model is realized by following technical scheme: a kind of small-power photovoltaic inversion low-voltage is passed through circuit, comprises rectification module, current-limiting resistance R1, super capacitor C1, diode I D7, diode III D8, photovoltaic DC-to-AC converter be incorporated into the power networks end J1, photovoltaic DC-to-AC converter contact coil J2, diode II D9; Photovoltaic DC-to-AC converter is incorporated into the power networks and holds J1 to be connected with rectification module, the positive pole of rectification module is connected with the anode of photovoltaic DC-to-AC converter contact coil J2, the negative pole of rectification module is by current-limiting resistance R1, diode II D9 is connected with super capacitor C1 is anodal, the negative pole of rectification module is connected with the negative terminal of photovoltaic DC-to-AC converter contact coil J2, and be connected with the negative pole of super capacitor C1, the positive pole of super capacitor C1 and the back anode parallel connection that contacts coil J2 with photovoltaic DC-to-AC converter of diode I D7 series connection, photovoltaic DC-to-AC converter contact coil J2 negative terminal is connected with super capacitor C1 negative pole, photovoltaic DC-to-AC converter contact coil J2 anode is connected with diode III D8 is anodal, and photovoltaic DC-to-AC converter contact coil J2 negative terminal is connected with diode III D8 negative pole.
Described rectification module is three rectifier bridges, and photovoltaic DC-to-AC converter is incorporated into the power networks and holds J to be connected with three rectifier bridges.Described three rectifier bridges comprise D1, D2, D3, D4, D5, D6; Photovoltaic DC-to-AC converter is incorporated into the power networks and holds J1 to be connected with D1, D2, D3, D4, D5, the D6 of three rectifier bridges respectively.
The operation principle that a kind of small-power photovoltaic inversion low-voltage is passed through circuit is: when photovoltaic DC-to-AC converter is incorporated into the power networks end J1 operate as normal, and photovoltaic DC-to-AC converter contact coil J2 operate as normal.Simultaneously, photovoltaic DC-to-AC converter is incorporated into the power networks and holds J1 to give super capacitor C1 charging by current-limiting resistance R1, diode II D9, guarantee in a period of time, photovoltaic DC-to-AC converter contact coil J2 voltage is not less than minimum operating voltage, realize not off-grid of inverter, meanwhile, diode I D7 bears reverse voltage and ends; When photovoltaic DC-to-AC converter is incorporated into the power networks end J1 voltage when falling suddenly; super capacitor C1 powers to photovoltaic DC-to-AC converter contact coil J2 by diode I D7; make it to remain on operate as normal in a period of time; coil voltage is not less than minimum operating voltage; realize not off-grid of inverter; simultaneously; diode II D9 is ended by reverse voltage; electric current does not flow through current-limiting resistance R1; reduce energy consumption; diode III D8 contacts coil J2 parallel connection with photovoltaic DC-to-AC converter, play the afterflow effect in the inversion process, the protection inverter circuit.
The beneficial effect that the utlity model has is: it is stable that the photovoltaic DC-to-AC converter low-voltage is passed through circuit working, the reliability height, and cost is low.
Description of drawings
Fig. 1 is circuit theory diagrams of the present utility model.
Each label is among the figure: rectification module, current-limiting resistance R1, super capacitor C1, diode I D7, photovoltaic DC-to-AC converter are incorporated into the power networks and hold J1, photovoltaic DC-to-AC converter contact coil J2, diode II D9, diode III D8.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail, but content of the present utility model is not limited to described scope.
Embodiment 1: as shown in Figure 1, a kind of small-power photovoltaic inversion low-voltage is passed through circuit, comprises rectification module, current-limiting resistance R1, super capacitor C1, diode I D7, diode III D8, photovoltaic DC-to-AC converter be incorporated into the power networks end J1, photovoltaic DC-to-AC converter contact coil J2, diode II D9; Photovoltaic DC-to-AC converter is incorporated into the power networks and holds J1 to be connected with rectification module, the positive pole of rectification module is connected with the anode of photovoltaic DC-to-AC converter contact coil J2, the negative pole of rectification module is by current-limiting resistance R1, diode II D9 is connected with super capacitor C1 is anodal, the negative pole of rectification module is connected with the negative terminal of photovoltaic DC-to-AC converter contact coil J2, and be connected with the negative pole of super capacitor C1, the positive pole of super capacitor C1 and the back anode parallel connection that contacts coil J2 with photovoltaic DC-to-AC converter of diode I D7 series connection, photovoltaic DC-to-AC converter contact coil J2 negative terminal is connected with super capacitor C1 negative pole, photovoltaic DC-to-AC converter contact coil J2 anode is connected with diode III D8 is anodal, and photovoltaic DC-to-AC converter contact coil J2 negative terminal is connected with diode III D8 negative pole.
Rectification module is three rectifier bridges, and photovoltaic DC-to-AC converter is incorporated into the power networks and holds J to be connected with three rectifier bridges.Three rectifier bridges comprise D1, D2, D3, D4, D5, D6; Photovoltaic DC-to-AC converter is incorporated into the power networks and holds J1 to be connected with D1, D2, D3, D4, D5, the D6 of three rectifier bridges respectively.
Claims (2)
1. a small-power photovoltaic inversion low-voltage is passed through circuit, it is characterized in that: comprise rectification module, current-limiting resistance R1, super capacitor C1, diode I D7, diode III D8, photovoltaic DC-to-AC converter be incorporated into the power networks end J1, photovoltaic DC-to-AC converter contact coil J2, diode II D9; Photovoltaic DC-to-AC converter is incorporated into the power networks and holds J1 to be connected with rectification module, the positive pole of rectification module is connected with the anode of photovoltaic DC-to-AC converter contact coil J2, the negative pole of rectification module is by current-limiting resistance R1, diode II D9 is connected with super capacitor C1 is anodal, the negative pole of rectification module is connected with the negative terminal of photovoltaic DC-to-AC converter contact coil J2, and be connected with the negative pole of super capacitor C1, the positive pole of super capacitor C1 and the back anode parallel connection that contacts coil J2 with photovoltaic DC-to-AC converter of diode I D7 series connection, photovoltaic DC-to-AC converter contact coil J2 negative terminal is connected with super capacitor C1 negative pole, photovoltaic DC-to-AC converter contact coil J2 anode is connected with diode III D8 is anodal, and photovoltaic DC-to-AC converter contact coil J2 negative terminal is connected with diode III D8 negative pole.
2. small-power photovoltaic inversion low-voltage according to claim 1 is passed through circuit, it is characterized in that: described rectification module is three rectifier bridges, and photovoltaic DC-to-AC converter is incorporated into the power networks and holds J1 to be connected with three rectifier bridges.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200174377U CN203056605U (en) | 2013-01-14 | 2013-01-14 | Low-power photovoltaic inverter low voltage ride through circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2013200174377U CN203056605U (en) | 2013-01-14 | 2013-01-14 | Low-power photovoltaic inverter low voltage ride through circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203056605U true CN203056605U (en) | 2013-07-10 |
Family
ID=48739525
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2013200174377U Expired - Fee Related CN203056605U (en) | 2013-01-14 | 2013-01-14 | Low-power photovoltaic inverter low voltage ride through circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203056605U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104104217A (en) * | 2014-07-08 | 2014-10-15 | 安徽金峰新能源股份有限公司 | Power energy storage module for under-voltage protection of 500kW and 630kW photovoltaic inverter |
-
2013
- 2013-01-14 CN CN2013200174377U patent/CN203056605U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104104217A (en) * | 2014-07-08 | 2014-10-15 | 安徽金峰新能源股份有限公司 | Power energy storage module for under-voltage protection of 500kW and 630kW photovoltaic inverter |
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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 |
Granted publication date: 20130710 Termination date: 20150114 |
|
| EXPY | Termination of patent right or utility model |