CN202474827U - Countercurrent prevention controller - Google Patents
Countercurrent prevention controller Download PDFInfo
- Publication number
- CN202474827U CN202474827U CN 201120457827 CN201120457827U CN202474827U CN 202474827 U CN202474827 U CN 202474827U CN 201120457827 CN201120457827 CN 201120457827 CN 201120457827 U CN201120457827 U CN 201120457827U CN 202474827 U CN202474827 U CN 202474827U
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- contactor
- adverse current
- links
- master board
- sampling plate
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- Supply And Distribution Of Alternating Current (AREA)
Abstract
The utility model provides a countercurrent prevention controller, comprising a sampling plate, a control cabinet, a main control panel, a contactor, and a liquid crystal touch operation screen; wherein, one end of the sampling plate is connected with a low voltage side of a power grid, the other end of the sampling plate is connected with one end the contactor, the sampling plate is also connected with the main control panel through an RS-485 (Recommend Standard 485) communication line, the other end of the contactor is connected with inverters; a load is connected with a connecting line between the sampling plate and the contactor; the main control panel is also connected with the inverters and the contactor through the RS-485 communication lines; and the liquid crystal touch operation screen is in electric signal connection with the main control panel. The countercurrent prevention controller of the utility model has the advantages of quick reaction speed, good adaptability, and simple operation.
Description
Technical field
The utility model relates to electric equipment, particularly a kind of anti-adverse current controller.
Background technology
At present, along with the fast development of economy, the reserves of non-renewable energy resources such as oil, coal are fewer and feweri, and the energy and environmental problem become increasingly conspicuous, and the development and utilization of regenerative resource more and more receives people's attention.As one of important clean energy resource; Utilize the global fast development of technical research, technological development of solar energy at present; Equipment such as solar water heater, solar cell, solar energy stove have obtained using widely, and solar energy power generating is an important techniques wherein.
According to 8.3 regulation in (2009) No. 747 files of national grid development " State Grid Corporation of China's photovoltaic plant inserts electric power network technique regulation (try) ": reverse power protection is designed to irreversible and during net mode, should disposes reverse power and protect equipment when photovoltaic plant.When detect backward current surpass specified output 5% the time, photovoltaic plant should stop to send to power network line in 0.5～2 second.
For satisfying the requirement of national grid, be necessary to develop a kind of anti-adverse current controller to reverse power protection.
The utility model content
The purpose of the utility model in order to solve the problems referred to above that prior art exists, provides a kind of anti-adverse current controller exactly.
To achieve these goals; The utility model has adopted following technical scheme: a kind of anti-adverse current controller; Be used to be connected between the inverter of electrical network, load and photovoltaic plant; Comprise sampling plate; Switch board is arranged on master board and the contactor in the switch board and is inlaid in the lcd touch operation screen on the switch board panel; One end of sampling plate links to each other with the low-pressure side of electrical network and gathers the electric current and voltage information of electrical network low-pressure side; The other end of sampling plate links to each other with an end of contactor, and sampling plate also is transferred to master board through the RS-485 connection electric current and voltage information that will collect that links to each other with master board; The other end of contactor links to each other with inverter; Load links to each other with connection line between sampling plate, the contactor; Master board also links to each other with inverter through the RS-485 connection and regulates the output of inverter based on loading condition, and master board passes through also that the RS-485 connection links to each other with contactor and based on the break-make of loading condition control contactor; Lcd touch operation screen links to each other with the master board signal of telecommunication.
Described lcd touch operation screen is provided with two parameters, i.e. power controlling P
ControlWith the adverse current power P
Adverse current, work as P
Adverse current＜P
Output＜P
ControlThe time, the power output of inverter is regulated in master board through the RS-485 connection; Work as P
Output＜P
Adverse currentWhen being the adverse current generation, master board is cut off contactor through the RS-485 connection, cuts off the output of inverter fully.
Described power controlling P
ControlWith the adverse current power P
Adverse currentSet according to actual needs.
The anti-adverse current controller of the utility model has following advantage and characteristics:
1, reaction speed is fast: when anti-adverse current controller detects the adverse current generation, within 0.3 second, cut away adverse current power;
2, adaptability is strong: through the operation screen of anti-adverse current control, we can set power controlling (P control) and adverse current power (P adverse current) according to actual needs.
3, simple to operate: apparatus parameter setting finishes, and the operation of this equipment need not the manual control switch, and fault all has record at every turn, from the operation screen, can directly access.
Description of drawings
Fig. 1 is the basic structure sketch map of the anti-adverse current controller of the utility model;
Fig. 2 is the circuit theory diagrams of the control cubicle in the utility model.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment the utility model is elaborated.
Referring to Fig. 1, Fig. 2; The anti-adverse current controller of the utility model; Be used to be connected between the inverter 3 of electrical network 1, load 2 and photovoltaic plant; Comprise sampling plate 4 (instrument transformer), control cubicle 5 is arranged on master board 6 (CPU) and the contactor 7 in the control cubicle 5 and is inlaid in lcd touch operation on the control cubicle panel and shields (not shown come out).One end of sampling plate 4 links to each other with the low-pressure side of electrical network 1 and gathers the electric current and voltage information of electrical network low-pressure side; The other end of sampling plate 4 links to each other with an end of contactor 7, and sampling plate 4 also links to each other with master board 6 through the RS-485 connection and gives master board 6 with the electric current and voltage message transmission that collects; The other end of contactor 7 links to each other with inverter 3; Load 2 links to each other with connection line between sampling plate 4, the contactor 7; Master board 6 also links to each other with inverter 3 through the RS-485 connection and regulates the output of inverter according to loading condition, and master board 6 passes through also that the RS-485 connection links to each other with contactor 7 and according to the break-make of loading condition control contactor; When load can not the full consumption photovoltaic electric power, to electrical network, this adverse current signal is transferred to master board through two IO mouth connections to photovoltaic electric power with adverse current; Master board will 0.3 second with interior disconnection contactor, cut off adverse current.Lcd touch operation screen links to each other with the master board signal of telecommunication.
Lcd touch operation screen in the utility model is provided with two parameters, i.e. power controlling P
ControlWith the adverse current power P
Adverse current, work as P
Adverse current＜P
Output＜P
ControlThe time, the power output of inverter is regulated in master board through the RS-485 connection; Work as P
Output＜P
Adverse currentWhen being the adverse current generation, master board is cut off contactor through the RS-485 connection, cuts off the output of inverter fully.
Power controlling P in the utility model
ControlWith the adverse current power P
Adverse currentSet according to actual needs.
Claims (3)
1. anti-adverse current controller; Be used to be connected between the inverter of electrical network, load and photovoltaic plant; It is characterized in that: comprise sampling plate, switch board is arranged on master board and the contactor in the switch board and is inlaid in the lcd touch operation screen on the switch board panel; One end of sampling plate links to each other with the low-pressure side of electrical network and gathers the electric current and voltage information of electrical network low-pressure side; The other end of sampling plate links to each other with an end of contactor, and sampling plate also is transferred to master board through the RS-485 connection electric current and voltage information that will collect that links to each other with master board; The other end of contactor links to each other with inverter; Load links to each other with connection line between sampling plate, the contactor; Master board also links to each other with inverter through the RS-485 connection and regulates the output of inverter based on loading condition, and master board passes through also that the RS-485 connection links to each other with contactor and based on the break-make of loading condition control contactor; Lcd touch operation screen links to each other with the master board signal of telecommunication.
2. anti-adverse current controller as claimed in claim 1 is characterized in that: described lcd touch operation screen is provided with two parameters, i.e. power controlling P
ControlWith the adverse current power P
Adverse current, work as P
Adverse current<p
Output<p
ControlThe time, the power output P of inverter is regulated in master board through the RS-485 connection
OutputWork as P
Output<p
Adverse currentWhen being the adverse current generation, master board is cut off contactor through the RS-485 connection, cuts off the output of inverter fully.
3. anti-adverse current controller as claimed in claim 1 is characterized in that: described power controlling P
ControlWith the adverse current power P
Adverse currentSet according to actual needs.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120457827 CN202474827U (en) | 2011-11-17 | 2011-11-17 | Countercurrent prevention controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120457827 CN202474827U (en) | 2011-11-17 | 2011-11-17 | Countercurrent prevention controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202474827U true CN202474827U (en) | 2012-10-03 |
Family
ID=46922955
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201120457827 Expired - Fee Related CN202474827U (en) | 2011-11-17 | 2011-11-17 | Countercurrent prevention controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN202474827U (en) |
Cited By (2)
| 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 |
| CN105140960A (en) * | 2015-09-02 | 2015-12-09 | 国网上海市电力公司 | Intelligent community micro power network system |
-
2011
- 2011-11-17 CN CN 201120457827 patent/CN202474827U/en not_active Expired - Fee Related
Cited By (2)
| 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 |
| CN105140960A (en) * | 2015-09-02 | 2015-12-09 | 国网上海市电力公司 | Intelligent community micro power network system |
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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: 20121003 Termination date: 20141117 |
|
| EXPY | Termination of patent right or utility model |