CN202474856U - Photovoltaic inverter system with direct-current false connection prevention function - Google Patents
Photovoltaic inverter system with direct-current false connection prevention function Download PDFInfo
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- CN202474856U CN202474856U CN201220118180XU CN201220118180U CN202474856U CN 202474856 U CN202474856 U CN 202474856U CN 201220118180X U CN201220118180X U CN 201220118180XU CN 201220118180 U CN201220118180 U CN 201220118180U CN 202474856 U CN202474856 U CN 202474856U
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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
Abstract
The utility model provides a photovoltaic inverter system with a direct-current false connection prevention function, which comprises a photovoltaic panel, a sampling circuit, a direct-current false connection prevention circuit, a drive circuit, a boost circuit, a direct current-alternating current inverter circuit, a system control circuit and an output filter circuit. The photovoltaic inverter system is characterized in that: the system comprises the direct-current false connection prevention circuit which is used for cutting off the current loop under the circumstance of false connection, the output ends of the photovoltaic panel are respectively connected with the input ends of the sampling circuit and the direct-current false connection prevention circuit, the output end of the direct-current false connection prevention circuit is connected in series with the boost circuit and then the input end of the direct current-alternating current inverter circuit, the output ends of the direct current-alternating current inverter circuit are respectively connected with the input ends of the system control circuit and the output filter circuit, and the output end of the sampling circuit is connected with the input end of the system control circuit. After the technical scheme is adopted, the grid-connected inverter system can be shut down to be protected under the circumstance of photovoltaic direct-current side input false connection, and thereby the safety of operators and the system is enhanced.
Description
Technical field
The utility model relates to field of photovoltaic power generation, specifically a kind of photovoltaic inversion system with anti-dc reverse connection function.
Background technology
Current having obtained of photovoltaic power generation technology paid attention to widely and used, and on the technical spirit based on photovoltaic grid-connected inverting system is to convert the output of the direct current energy of photovoltaic panel to AC energy to export in the electrical network, and guarantees that the quality of power supply of output meets the electrical network requirement.The main performance index of photovoltaic grid-connected inverting system comprises system's conversion efficiency, the output quality of power supply, Electro Magnetic Compatibility or the like.But along with grid-connected development, people use and operate the safety requirements of photovoltaic grid-connected inverting system also should be increasingly high.
Wherein, prevent that the function of DC side input reversal connection from will improve the autoprotection performance of grid-connected inverting system to a great extent, also further make the safer of system operator.A lot of producers adopt connector and both positive and negative polarity sign to remind with sign as the safeguard measure of the direct current input reversal connection of grid-connected inverting system.Consider in a whole set of photovoltaic system assembling process and make mistakes, or select the accessory between the different vendor for use, still might cause direct current input reversal connection because of connector is supporting.Therefore, designing a kind of grid-connected inverting system with anti-dc reverse connection function, is very important to improving security of system.
Summary of the invention
The utility model technical problem to be solved is: the photovoltaic inversion system that a kind of anti-dc reverse connection function of band of simple in structure and easy execution is provided.
For solving the problems of the technologies described above, the utility model adopts following technical scheme:
A kind of photovoltaic inversion system with anti-dc reverse connection function; Comprise photovoltaic battery panel, sample circuit, anti-dc reverse connection circuit, drive circuit, Boost booster circuit, DC-AC inverter circuit, system, control circuit and output filter circuit; It is characterized in that: native system also comprises an anti-dc reverse connection circuit that is used to block current circuit under the reversal connection situation; The output of said photovoltaic battery panel connects the input of sample circuit and anti-dc reverse connection circuit respectively; Be connected to the input of DC-AC inverter circuit behind the output serial connection Boost booster circuit of anti-dc reverse connection circuit; The output of DC-AC inverter circuit is connected to the input of system, control circuit and output filter circuit respectively; The input of the output welding system control circuit of sample circuit connects the Boost booster circuit from the output control signal of system, control circuit behind drive circuit, and behind drive circuit, connects the DC-AC inverter circuit from another group control signal of system, control circuit output.
Said anti-dc reverse connection circuit comprises power resistor, power diode and relay, and said power resistor and power diode are parallelly connected with relay after the anode series connection, and the negative electrode output of power diode is the output of anti-dc reverse connection circuit.
After adopting above technical scheme: realize under the photovoltaic DC side input reversal connection situation stoppage protection, the fail safe that improves operating personnel and system self to grid-connected inverting system.
Description of drawings
Fig. 1 is that the circuit of the utility model connects sketch map;
Fig. 2 is the anti-dc reverse connection circuit diagram of the utility model.
Embodiment
Referring to Fig. 1; A kind of photovoltaic inversion system with anti-dc reverse connection function; Comprise photovoltaic battery panel 1, sample circuit 2, anti-dc reverse connection circuit 3, drive circuit 4, Boost booster circuit 5, DC-AC inverter circuit 6, system, control circuit 7 and output filter circuit 8; Native system also comprises an anti-dc reverse connection circuit that is used to block current circuit under the reversal connection situation; The output of photovoltaic battery panel 1 connects the input of sample circuit 2 and anti-dc reverse connection circuit 3 respectively; Be connected to the input of DC-AC inverter circuit 6 behind the output serial connection Boost booster circuit 5 of anti-dc reverse connection circuit 3; The output of DC-AC inverter circuit 6 is connected to the input of system, control circuit 7 and output filter circuit 8 respectively; The input of the output welding system control circuit 7 of sample circuit 2 connects Boost booster circuit 5 from the output control signal of system, control circuit 7 behind drive circuit 4, and behind drive circuit 4, connects DC-AC inverter circuit 6 from another group control signal of system, control circuit 7 outputs.
Referring to Fig. 2; Anti-dc reverse connection circuit comprises power resistor 9, power diode 10 and relay 11; Said power resistor 9 is parallelly connected with relay 11 after the anode series connection with power diode 10, and the negative electrode output of power diode 10 is the output of anti-dc reverse connection circuit 3, on grid-connected inverting system, adds this circuit; Prevent the error-polarity connection when DC side inserts, improve the safety operation property of system.
The operation principle of the utility model:
When implementing; The direct voltage connecting system of photovoltaic battery panel, system, control circuit is before the control that starts Boost booster circuit and inverter circuit, promptly under the switching tube cut-off state of Boost circuit; Latching relay is in off-state; Direct voltage input is charged to bus capacitor by Boost circuit inductance and diode through power resistor and the series arm that diode constitutes earlier again, and the detection capacitance voltage charges to voltage with the DC side access when close, sends signal by system, control circuit and makes the relay conducting; The charging paths that bypass power resistor and diode constitute begins the conventional Boost booster circuit and the control of inverter circuit then.When DC side input reversal connection, because the effect of power diode in the anti-dc reverse connection circuit (Fig. 2) has been blocked the current circuit that constitutes under the reversal connection situation, thereby played the effect of protection.
Claims (2)
1. a band is prevented the photovoltaic inversion system of dc reverse connection function; Comprise photovoltaic cell (1), sample circuit (2), anti-dc reverse connection circuit (3), drive circuit (4), Boost booster circuit (5), DC-AC inverter circuit (6), system, control circuit (7) and output filter circuit (8); It is characterized in that: native system also comprises an anti-dc reverse connection circuit that is used to block current circuit under the reversal connection situation; The output of said photovoltaic battery panel (1) connects the input of sample circuit (2) and anti-dc reverse connection circuit (3) respectively; Be connected to the input of DC-AC inverter circuit (6) behind the output serial connection Boost booster circuit (5) of anti-dc reverse connection circuit (3); The output of DC-AC inverter circuit (6) is connected to the input of system, control circuit (7) and output filter circuit (8) respectively; The input of the output welding system control circuit (7) of sample circuit (2); Behind drive circuit (4), connect Boost booster circuit (5) from the output control signal of system, control circuit (7), and from system, control circuit (7) export another the group control signal behind drive circuit (4), connect DC-AC inverter circuit (6).
2. a kind of photovoltaic inversion system according to claim 1 with anti-dc reverse connection function; It is characterized in that: said anti-dc reverse connection circuit comprises power resistor (9), power diode (10) and relay (11); Said power resistor (9) and power diode (10) are parallelly connected with relay (11) after the anode series connection, and the negative electrode output of power diode (10) is the output of anti-dc reverse connection circuit (3).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220118180XU CN202474856U (en) | 2012-03-26 | 2012-03-26 | Photovoltaic inverter system with direct-current false connection prevention function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201220118180XU CN202474856U (en) | 2012-03-26 | 2012-03-26 | Photovoltaic inverter system with direct-current false connection prevention function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202474856U true CN202474856U (en) | 2012-10-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201220118180XU Expired - Fee Related CN202474856U (en) | 2012-03-26 | 2012-03-26 | Photovoltaic inverter system with direct-current false connection prevention function |
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| CN (1) | CN202474856U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104601020A (en) * | 2015-01-05 | 2015-05-06 | 合肥天舟光伏技术有限公司 | Electric energy conservation type inverter for photovoltaic grid connection |
| CN106877816A (en) * | 2017-03-31 | 2017-06-20 | 阳光电源股份有限公司 | A kind of photovoltaic group string reversal connection detection method and device |
| CN112019013A (en) * | 2020-09-01 | 2020-12-01 | 北京理工华创电动车技术有限公司 | High-power DCDC anti-impact reverse-connection-prevention slow starting circuit and control method |
-
2012
- 2012-03-26 CN CN201220118180XU patent/CN202474856U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104601020A (en) * | 2015-01-05 | 2015-05-06 | 合肥天舟光伏技术有限公司 | Electric energy conservation type inverter for photovoltaic grid connection |
| CN106877816A (en) * | 2017-03-31 | 2017-06-20 | 阳光电源股份有限公司 | A kind of photovoltaic group string reversal connection detection method and device |
| CN106877816B (en) * | 2017-03-31 | 2019-09-10 | 阳光电源（上海）有限公司 | A kind of photovoltaic group string reversal connection detection method and device |
| CN112019013A (en) * | 2020-09-01 | 2020-12-01 | 北京理工华创电动车技术有限公司 | High-power DCDC anti-impact reverse-connection-prevention slow starting circuit and control method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| ASS | Succession or assignment of patent right |
Owner name: PENG JINGSHENG Free format text: FORMER OWNER: ZHEJIANG TRESS ELECTRONIC TECHNOLOGY CO., LTD. Effective date: 20140326 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140326 Address after: 325600, Pai Li Tau Industrial Zone, seven Li, Zhejiang, Yueqing Patentee after: Peng Jingsheng Address before: 325600, Pai Li Tau Industrial Zone, seven Li, Wenzhou, Zhejiang, Yueqing Patentee before: Zhejiang Tress Electronics Technology Co.,Ltd. |
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| ASS | Succession or assignment of patent right |
Owner name: HUBEI TRESS TECHNOLOGY GROUP CO., LTD. Free format text: FORMER OWNER: PENG JINGSHENG Effective date: 20140903 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| COR | Change of bibliographic data |
Free format text: CORRECT: ADDRESS; FROM: 325600 WENZHOU, ZHEJIANG PROVINCE TO: 435000 HUANGSHI, HUBEI PROVINCE |
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| TR01 | Transfer of patent right |
Effective date of registration: 20140903 Address after: 435000 No. 278, Zijin Mountain Avenue, Jinshan Street office, Hubei, Huangshi Patentee after: Tres Hubei science and Technology Group Co Ltd Address before: 325600, Pai Li Tau Industrial Zone, seven Li, Zhejiang, Yueqing Patentee before: Peng Jingsheng |
|
| ASS | Succession or assignment of patent right |
Owner name: HUBEI HONGGUANG NEW ENERGY TECHNOLOGY CO., LTD. Free format text: FORMER OWNER: HUBEI TRESS TECHNOLOGY GROUP CO., LTD. Effective date: 20140929 |
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| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20140929 Address after: 435000,, west of A6 Road, Jinshan Industrial Zone, Hubei, south of B4 Road (Jinshan Street office, 278 Zijin Mountain Avenue) Patentee after: Hubei Hong light Amperex Technology Limited Address before: 435000 No. 278, Zijin Mountain Avenue, Jinshan Street office, Hubei, Huangshi Patentee before: Tres Hubei science and Technology Group Co Ltd |
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| 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: 20121003 Termination date: 20160326 |