CN202019194U - Countercurrent prevention device - Google Patents
Countercurrent prevention device Download PDFInfo
- Publication number
- CN202019194U CN202019194U CN 201120090188 CN201120090188U CN202019194U CN 202019194 U CN202019194 U CN 202019194U CN 201120090188 CN201120090188 CN 201120090188 CN 201120090188 U CN201120090188 U CN 201120090188U CN 202019194 U CN202019194 U CN 202019194U
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- China
- Prior art keywords
- measure
- power generation
- countercurrent prevention
- stream controller
- reverse stream
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Abstract
The utility model discloses a countercurrent prevention device, which comprises solar power generation photovoltaic systems (1), alternating-current power distribution cabinets (2), measure and control instruments (3), a countercurrent prevention controller (4) and a local electricity user (5). A signal input end of the countercurrent prevention controller (4) is connected with detection signal output ends of the measure and control instruments (3) used for monitoring voltage and current of the solar power generation photovoltaic systems (1), a signal output end of the countercurrent prevention controller (4) is connected with the alternating-current power distribution cabinets (2) via the measure and control instruments (3), and the alternating-current distribution cabinets (2) are connected with the local electricity user (5). Overall output electric energy of the photovoltaic power generation systems can be reduced under the condition that electricity usage of the local electricity user is low (lower than power generation quantity of the photovoltaic systems), and the countercurrent prevention device prevents electric energy from being transmitted to a power grid of a mains supply. The countercurrent prevention device is reasonable in design and is convenient and practical.
Description
Technical field
The utility model is a kind of anti-backflow device, particularly a kind of by electric component control grid-connected photovoltaic system being incorporated into the power networks with from net, thereby realize the anti-backflow device that the irreversible time is photovoltaic grid-connected, belong to the renovation technique of anti-backflow device.
Background technology
At present, local power department is worried can cause the utility grid instability after photovoltaic (solar energy) generating is incorporated into the power networks with civil power, and may produce harmonic wave, and photovoltaic (solar energy) generating simultaneously has non-scheduling.Anti-backflow device addresses this problem reliable method just.
The utility model content
The purpose of this utility model is to consider the problems referred to above and a kind of output current that reduces the overall optical photovoltaic generating system that reaches is provided, and reduces the anti-backflow device of photovoltaic generating system generated output.The utility model is reasonable in design, and is convenient and practical.
The technical solution of the utility model is: anti-backflow device of the present utility model, include solar power generation photovoltaic system, AC power distribution cabinet/AC distribution panel, measure and control instrument, anti-reverse stream controller, local electricity consumption user, wherein the signal input part of anti-reverse stream controller is connected with the detection signal output of the measure and control instrument of electric current with the voltage of monitoring solar power generation photovoltaic system, the signal output part of anti-reverse stream controller is connected with AC power distribution cabinet/AC distribution panel by measure and control instrument again, and AC power distribution cabinet/AC distribution panel is connected with local electricity consumption user.
Above-mentioned communication interface is RS485.
Above-mentioned anti-reverse stream controller can also be connected with background monitoring system and dispatching patcher by Ethernet or serial ports.
The utility model is owing to adopt the signal input part of anti-reverse stream controller to be connected with the detection signal output of the measure and control instrument of electric current with the voltage of monitoring solar power generation photovoltaic system, the signal output part of anti-reverse stream controller is connected with AC power distribution cabinet/AC distribution panel by measure and control instrument again, the structure that AC power distribution cabinet/AC distribution panel is connected with local electricity consumption user, directly offer the electricity consumption of this mansion load in order to control solar power generation photovoltaic system electricity amount, rather than be fed to city's electrical network, anti-reverse stream controller can pass through the measure and control instrument voltage and the electric current of monitoring network side at any time, in case find to the electrical network intake, anti-reverse stream controller passes through anti-reverse stream controller transmitting control commands to measure and control instrument according to the logic determines rule, the switch of AC power distribution cabinet/AC distribution panel is cut off in measure and control instrument control, reach the output current that reduces the overall optical photovoltaic generating system, reduce the purpose of photovoltaic generating system generated output.When communication failure or other system failure occurring, the contactor that anti-reverse stream controller can be controlled in the AC power distribution cabinet/AC distribution panel disconnects, thereby thoroughly stops to local electricity consumption user power supply.The utility model can reduce the output electric energy of overall optical photovoltaic generating system under the situation of local electricity consumption user power utilization little (less than the photovoltaic system energy output), prevents to the utility grid transmission of electric energy, and be anti-backflow device a kind of reasonable in design, convenient and practical.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
Embodiment:
Structural representation of the present utility model as shown in Figure 1, anti-backflow device of the present utility model, include solar power generation photovoltaic system 1, AC power distribution cabinet/AC distribution panel 2, measure and control instrument 3, anti-reverse stream controller 4, local electricity consumption user 5, the signal input part of wherein anti-reverse stream controller 4 is connected with the detection signal output of the measure and control instrument 3 of electric current with the voltage of monitoring solar power generation photovoltaic system 1, the signal output part of anti-reverse stream controller 4 is connected with AC power distribution cabinet/AC distribution panel 2 by measure and control instrument 3 again, and AC power distribution cabinet/AC distribution panel 2 is connected with local electricity consumption user 5.
In the present embodiment, above-mentioned communication interface is RS485.Above-mentioned anti-reverse stream controller 4 can also be connected with background monitoring system and dispatching patcher by Ethernet or serial ports.
Operation principle of the present utility model is as follows: directly offer the electricity consumption of this mansion load in order to control solar power generation photovoltaic system 1 electricity amount, rather than be fed to city's electrical network, anti-reverse stream controller 4 can pass through measure and control instrument 3 voltage and the electric current of monitoring network side at any time, in case find to the electrical network intake, anti-reverse stream controller 4 passes through anti-reverse stream controller 4 transmitting control commands to measure and control instrument 3 according to the logic determines rule, the switch of AC power distribution cabinet/AC distribution panel 2 is cut off in measure and control instrument 3 controls, reduce output current to reach the overall optical photovoltaic generating system, reduce photovoltaic generation power.When communication failure or other system failure occurring, the contactor that anti-reverse stream controller 4 can be controlled in the AC power distribution cabinet/AC distribution panel 2 disconnects, thereby thoroughly stops to local electricity consumption user 5 power supplies.
Claims (3)
1. anti-backflow device, it is characterized in that including solar power generation photovoltaic system (1), AC power distribution cabinet/AC distribution panel (2), measure and control instrument (3), anti-reverse stream controller (4), local electricity consumption user (5), the signal input part of wherein anti-reverse stream controller (4) is connected with the detection signal output of the measure and control instrument (3) of electric current with the voltage of monitoring solar power generation photovoltaic system (1), the signal output part of anti-reverse stream controller (4) is connected with AC power distribution cabinet/AC distribution panel (2) by measure and control instrument (3) again, and AC power distribution cabinet/AC distribution panel (2) is connected with local electricity consumption user (5).
2. anti-backflow device according to claim 1 is characterized in that above-mentioned communication interface is RS485.
3. anti-backflow device according to claim 1 and 2 is characterized in that above-mentioned anti-reverse stream controller (4) can also be connected with background monitoring system and dispatching patcher by Ethernet or serial ports.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120090188 CN202019194U (en) | 2011-03-30 | 2011-03-30 | Countercurrent prevention device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120090188 CN202019194U (en) | 2011-03-30 | 2011-03-30 | Countercurrent prevention device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202019194U true CN202019194U (en) | 2011-10-26 |
Family
ID=44812861
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120090188 Expired - Lifetime CN202019194U (en) | 2011-03-30 | 2011-03-30 | Countercurrent prevention device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202019194U (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102868181A (en) * | 2012-09-27 | 2013-01-09 | 广东易事特电源股份有限公司 | Anti-backflow method and device for grid-connected power generation system |
| CN103117534A (en) * | 2011-11-17 | 2013-05-22 | 上海太阳能科技有限公司 | Anti-reflux controller |
| CN103269084A (en) * | 2013-03-28 | 2013-08-28 | 上海空间电源研究所 | Anti-reflux control device and photovoltaic energy storage connecting grid power generation method thereof |
-
2011
- 2011-03-30 CN CN 201120090188 patent/CN202019194U/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103117534A (en) * | 2011-11-17 | 2013-05-22 | 上海太阳能科技有限公司 | Anti-reflux controller |
| CN102868181A (en) * | 2012-09-27 | 2013-01-09 | 广东易事特电源股份有限公司 | Anti-backflow method and device for grid-connected power generation system |
| CN103269084A (en) * | 2013-03-28 | 2013-08-28 | 上海空间电源研究所 | Anti-reflux control device and photovoltaic energy storage connecting grid power generation method thereof |
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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: 20111026 |
|
| CX01 | Expiry of patent term |