CN201985547U - Easily controlled photovoltaic inverter control system - Google Patents
Easily controlled photovoltaic inverter control system Download PDFInfo
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- CN201985547U CN201985547U CN201120086106XU CN201120086106U CN201985547U CN 201985547 U CN201985547 U CN 201985547U CN 201120086106X U CN201120086106X U CN 201120086106XU CN 201120086106 U CN201120086106 U CN 201120086106U CN 201985547 U CN201985547 U CN 201985547U
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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 the field of grid-connected photovoltaic inverters, in particular to an easily controlled photovoltaic inverter control system. In the control system, an alternating current signal is output through an inverter main circuit, and filtering is performed through a filter circuit to acquire alternating current sine wave voltage; the alternating current sine wave voltage is detected by using a detection circuit, and a detection result is transmitted into a digital signal processor (DSP) as a voltage loop signal; a received digital signal is compared with a signal output by the expected inverter main circuit by using the digital signal processor (DSP), and a control signal is generated to be transmitted to a driving circuit; and the control signal is transmitted to the inverter main circuit by the driving circuit. In the system, the digital signal processor (DSP) is used as a control center, so that complexity of a hardware circuit is greatly reduced and measurement error brought by discreteness of a device is avoided; and the control system also comprises a high-performance embedded integrated touch screen in which an embedded low-power central processing unit (CPU) is used as the core, so that data can be processed by the DSP in real time.
Description
Technical field
The utility model relates to the photovoltaic combining inverter field, is specifically related to a kind of photovoltaic DC-to-AC converter control system that is easy to control.
Background technology
Solar energy power generating belongs to the regenerative resource of cleaning, and development and extensive use photovoltaic power generation technology have important function for the shortage of alleviating conventional energy resource and minimizing environmental pollution.Combining inverter is used for the direct current that solar cell sends being changed into alternating current and generating electricity by way of merging two or more grid systems with electrical network, and vital status is being arranged aspect the development and utilization of new forms of energy.Yet the hardware of traditional photovoltaic DC-to-AC converter is more and circuit structure is quite complicated, simultaneously because the discreteness of device has been brought bigger measure error, thereby makes existing photovoltaic DC-to-AC converter inefficiency and unstable working condition, demands urgently improving.
The utility model content
The purpose of this utility model provides a kind of photovoltaic DC-to-AC converter control system that is easy to control, and this control system has reduced the complexity of hardware, the bigger measure error of having avoided the discreteness of device to bring.
For achieving the above object, the utility model has adopted following technical scheme:
A kind of photovoltaic DC-to-AC converter control system that is easy to control comprises as the lower part:
Converter main circuit is used for converting the direct voltage and the current signal of photovoltaic array output to change by sinusoidal rule AC signal;
Filter circuit is used for and will flows to municipal electrical network after the above-mentioned AC signal filtering;
Testing circuit, the AC signal that is used to gather the filter circuit output, and the AC signal that collects is converted to is fit to the digital signal that digital signal processor DSP is handled, and this digital signal is exported to digital signal processor DSP;
Digital signal processor DSP is used for the digital signal that receiving test circuit sends, and the digital signal of receiving is made comparisons with the signal of expectation converter main circuit output, and produces control signal to send drive circuit to;
Drive circuit is used for control signal that receiving digital signals processor DSP transmits and this control signal is sent to converter main circuit;
The output of described digital signal processor DSP links to each other with the input of display unit.
The utility model can also be able to further realization by following measure simultaneously:
The described photovoltaic DC-to-AC converter control system that is easy to control also comprises the MPPT control circuit, the input of MPPT control circuit links to each other with the output of the direct voltage of photovoltaic array and electric current, and the output of MPPT control circuit links to each other with the input of digital signal processor DSP.
Described testing circuit comprises voltage sensor and current sensor.
Described filter circuit is the LC filter circuit.
Described display unit is that embedded type CPU is the touch-screen of core.
The beneficial effects of the utility model are:
1), the utility model adopts digital signal processor DSP as control centre, significantly reduced the complexity of hardware circuit, the measure error of having avoided the discreteness of device to bring;
2), be provided with the MPPT control circuit in the utility model, described MPPT is the maximal power tracing control unit, and described MPPT control circuit is synthetic with real component and idle component, finally obtains the optimal value of synchronization AC electric current;
3), the touch-screen of the utility model employing is that a cover is the high-performance embedded integrated touch-screen of core with embedded type low-power consumption CPU, can realize alleviating the burden of DSP, make the deal with data that DSP more can be real-time, the man-machine interface design of hommization makes that operation is simpler, communication is more open, standard 485,232, TCP/IP communication interface and communications protocol, be convenient to and other ancillary equipment communication.
Description of drawings
Fig. 1 is a structural representation of the present utility model.
Embodiment
As shown in Figure 1, a kind of photovoltaic DC-to-AC converter control system that is easy to control comprises as the lower part:
Converter main circuit 20 is used for converting the direct voltage and the current signal of photovoltaic array 10 outputs to change by sinusoidal rule AC signal;
Digital signal processor DSP 60 is used for the digital signal that receiving test circuit 50 sends, and the digital signal of receiving is made comparisons with the signal of expectation converter main circuit 20 outputs, and produces control signal to send drive circuit 70 to;
The described photovoltaic DC-to-AC converter control system that is easy to control also comprises MPPT control circuit 80, the input of MPPT control circuit 80 links to each other with the direct voltage of photovoltaic array 10 and the output of electric current, and the output of MPPT control circuit 80 links to each other with the input of digital signal processor DSP 60.
The full name of MPPT control circuit 80 is the MPPT maximum power point tracking controller, and so-called MPPT maximum power point tracking promptly is meant the generating voltage of the detection solar cell that controller can be real-time, and follows the trail of the ceiling voltage current value, makes system works at the peak efficiency state.MPPT control circuit 80 in the utility model is direct voltage and the electric currents that detect photovoltaic array 10 outputs; calculate the power output of photovoltaic array; simultaneously send the tracking that control signal is finished maximum power, and realize defencive functions such as overvoltage, excess load and under voltage to digital signal processor DSP 60.
Described testing circuit 50 comprises voltage sensor and current sensor.
Described filter circuit 30 is the LC filter circuit.
The output of described digital signal processor DSP 60 links to each other with the input of display unit 90.
Described display unit 90 is the touch-screen of core for embedded type CPU.
The touch-screen that the utility model adopts is that a cover is the high-performance embedded integrated touch-screen of core (dominant frequency 400MHz) with embedded type low-power consumption CPU, can alleviate the burden of digital signal processor DSP, make the deal with data that digital signal processor DSP can be more real-time, the man-machine interface of touch-screen hommization design simultaneously makes that operation is simpler, communication is more open, standard 485,232, TCP/IP communication interface and communications protocol, be convenient to and other ancillary equipment communication.
Claims (5)
1. photovoltaic DC-to-AC converter control system that is easy to control is characterized in that comprising as the lower part:
Converter main circuit (20) is used for converting the direct voltage and the current signal of photovoltaic array (10) output to change by sinusoidal rule AC signal;
Filter circuit (30) is used for and will flows to municipal electrical network (40) after the above-mentioned AC signal filtering;
Testing circuit (50), be used to gather the AC signal of filter circuit (30) output, and the AC signal that collects is converted to the digital signal that suitable digital signal processor DSP (60) is handled, and this digital signal is exported to digital signal processor DSP (60);
Digital signal processor DSP (60), be used for the digital signal that receiving test circuit (50) sends, and the digital signal received and the signal of expectation converter main circuit (20) output made comparisons, and produce control signal to send drive circuit (70) to;
Drive circuit (70) is used for receiving digital signals processor DSP(60) control signal that transmits and this control signal sent to converter main circuit (20);
The output of described digital signal processor DSP (60) links to each other with the input of display unit (90).
2. the photovoltaic DC-to-AC converter control system that is easy to control according to claim 1, it is characterized in that: the described photovoltaic DC-to-AC converter control system that is easy to control also comprises MPPT control circuit (80), the input of MPPT control circuit (80) links to each other with the direct voltage of photovoltaic array (10) and the output of electric current, and the output of MPPT control circuit (80) links to each other with the input of digital signal processor DSP (60).
3. the photovoltaic DC-to-AC converter control system that is easy to control according to claim 1 and 2 is characterized in that: described testing circuit (50) comprises voltage sensor and current sensor.
4. the photovoltaic DC-to-AC converter control system that is easy to control according to claim 1 and 2 is characterized in that: described filter circuit (30) is the LC filter circuit.
5. the photovoltaic DC-to-AC converter control system that is easy to control according to claim 1 is characterized in that: described display unit (90) is the touch-screen of core for embedded type CPU.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120086106XU CN201985547U (en) | 2011-03-28 | 2011-03-28 | Easily controlled photovoltaic inverter control system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201120086106XU CN201985547U (en) | 2011-03-28 | 2011-03-28 | Easily controlled photovoltaic inverter control system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201985547U true CN201985547U (en) | 2011-09-21 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201120086106XU Expired - Fee Related CN201985547U (en) | 2011-03-28 | 2011-03-28 | Easily controlled photovoltaic inverter control system |
Country Status (1)
| Country | Link |
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| CN (1) | CN201985547U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104615011A (en) * | 2015-01-13 | 2015-05-13 | 嘉兴清源电气科技有限公司 | Man-machine interaction system of photovoltaic array simulator |
-
2011
- 2011-03-28 CN CN201120086106XU patent/CN201985547U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104615011A (en) * | 2015-01-13 | 2015-05-13 | 嘉兴清源电气科技有限公司 | Man-machine interaction system of photovoltaic array simulator |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20110921 Termination date: 20140328 |