CN201639517U - Photovoltaic MPPT (Maximum Power Point Tracking) control circuit - Google Patents
Photovoltaic MPPT (Maximum Power Point Tracking) control circuit Download PDFInfo
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- CN201639517U CN201639517U CN2010201019394U CN201020101939U CN201639517U CN 201639517 U CN201639517 U CN 201639517U CN 2010201019394 U CN2010201019394 U CN 2010201019394U CN 201020101939 U CN201020101939 U CN 201020101939U CN 201639517 U CN201639517 U CN 201639517U
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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 photovoltaic MPPT (Maximum Power Point Tracking) control circuit which comprises inductors (L1 and L2), capacitors (C1 and C2), a diode D, a main switch S1, an auxiliary switch S2 and a protection switch S3. The photovoltaic MPPT control circuit can effectively increase the use ratio of solar energy and the overall efficiency of a MPPT control system, can improve a convertor to provide failure isolation during system failure and can increase the reliability of the system.
Description
Technical field
The utility model relates to a kind of photovoltaic MPPT control system, is a kind of photovoltaic MPPT control circuit specifically.
Background technology
The development and application of new forms of energy becomes the inexorable trend of world today's development.Solar energy is a kind of new forms of energy of ten minutes potentialization, and photovoltaic generation is one of current main mode of utilizing solar energy.Solar energy power generating has great importance to alleviating energy crisis and minimizing environmental pollution, and has broad application prospects.Characteristic by ten photovoltaic arrays is subjected to intensity of sunshine and ambient temperature effect, and inverter also must satisfy the service requirement of photovoltaic array.Must make photovoltaic array output voltage convergence maximum power point output voltage by the adjusting of inverter, obtain the maximum energy in the maximum power point operation to guarantee photovoltaic array.Therefore the output voltage of photovoltaic cell and output current exist unique maximum power point (mpp) (MaximumPower Point, a MPP along with the variation of intensity of sunshine and battery junction temperature has strong nonlinear under specific operational environment.In the application system of reality, the radiation intensity of natural daylight and the light transmittance of atmosphere are all located in ten dynamic changes, in order under same intensity of sunshine and battery junction temperature, to obtain electric energy as much as possible, just exist a maximum power point (mpp) and follow the tracks of (Maximum Power Point Tracking, problem MPPT).In order to obtain the peak power output of photovoltaic cell, need between photovoltaic cell and load, increase the one-level transducer of connecting.The MPPT maximum power point tracking control technology is exactly this grade transducer of series connection in the middle of being used to control, make it adjust the output voltage of photovoltaic cell, under the changing environment condition, still make the photovoltaic cell output voltage follow the tracks of the pairing maximum power point voltage of current environment all the time, thereby realize photovoltaic cell power output maximization technology.Sepic DC converting control circuit has obtained extensive use in photovoltaic generating system, be mainly used in the direct current energy that photovoltaic module is sent and carry out conversion and management, Chang Gui Sepic converter is controlled switch S entirely by inductance L 1, L2 as shown in Figure 1, capacitor C 1, C2, form with diode D, adopt traditional single switch S epic converter, its conversion efficiency is often not high, and when faults such as outlet side is short-circuited, can not realize the electrical isolation of input and output side, the reliability fail safe is relatively poor.
Summary of the invention
The purpose of this utility model just provides a kind of photovoltaic MPPT control circuit, it can improve the whole efficiency of solar energy utilization ratio and MPPT control system effectively, and can improve converter provides Fault Isolation fast and improves system when the system failure reliability.
The technical solution of the utility model is:
A kind of photovoltaic MPPT control circuit; comprise inductance (L1, L2); electric capacity (C1, C2); diode D and switch S; wherein switch S includes main switch S1; auxiliary switch S2; protection switch S3; wherein protection switch S3, inductance L 1, capacitor C 1, auxiliary switch S2 are connected on the anodal circuit successively; there is diode D to be connected in parallel on the both positive and negative polarity circuit between protection switch S3 and the inductance L 1; there is main switch S1 in parallel between inductance L 1 and the capacitor C 1, has inductance L 2 in parallel between capacitor C 1 and the auxiliary switch S2, capacitor C 2 parallel connections are arranged behind the auxiliary switch S2.
Above-mentioned main switch S1, auxiliary switch S2, the protection switch S3 controlled device that all links to each other with the MPPT controller is respectively controlled.
Above-mentioned protection switch S3 links to each other with the photovoltaic power input circuit, and auxiliary switch S2 links to each other with power output circuit.
Description of drawings
Further specify the utility model below in conjunction with the drawings and specific embodiments.
Fig. 1 list switch S epic converter circuit schematic diagram;
Fig. 2 is a control circuit schematic diagram of the present utility model.
Fig. 3 is the schematic diagram of an embodiment of the present utility model.
Embodiment
Photovoltaic MPPT control circuit as shown in Figure 2; comprise inductance (L1, L2); electric capacity (C1, C2); diode D and switch S; wherein switch S includes main switch S1; auxiliary switch S2; protection switch S3; wherein protection switch S3, inductance L 1, capacitor C 1, auxiliary switch S2 are connected on the anodal circuit successively; there is diode D to be connected in parallel on the both positive and negative polarity circuit between protection switch S3 and the inductance L 1; there is main switch S1 in parallel between inductance L 1 and the capacitor C 1, has inductance L 2 in parallel between capacitor C 1 and the auxiliary switch S2, capacitor C 2 parallel connections are arranged behind the auxiliary switch S2.
As shown in Figure 3: when starting working, the control system detected parameters is as normally then connecting protection switch pipe S3; When the control system detection had fault to take place, turn-off protection switching tube S3 carried out the insulation blocking input side.The Sepic translation circuit that the major-minor switching tube is formed is identical with traditional Sepic converter operation principle, and promptly when main switch S1 connected, auxiliary switch S2 turn-offed, the conducting simultaneously of Ui-S3-L1-S1 loop and C1-S1-L2 loop, L1 and L2 energy storage; When switching tube S1 disconnected, auxiliary switch S2 connected, Ui-S3-L1-C1-S2-C2//RL) loop and L2-S2-(C2//RL) loop conducting simultaneously, and power supply U1 and L1 are simultaneously to load and C2 power supply.The intact opto-electronic conversion of producing of solar cell photovoltaic array component, output DC to charge in batteries, and is directly powered to DC load after the DC/DC DC converting, or is powered to AC load after the DC/AC inversion.The DC/DC conversion mainly is that the power delivery of coupling photovoltaic generation and load concerns, realizes the MPPT control of photovoltaic generation, improves the utilance of power conversion and the whole efficiency of raising system.The MPPT controller is by the current/voltage of output of real-time sampling photovoltaic and load end, calculate real-time input and output power, according to result of calculation, adopt adaptive disturbance observation method [6-8] to adjust the duty cycle alpha of the pwm control signal of Sepic converter main switch S1 in real time, thereby regulate the power I/O relation of converter, reach load matched, guarantee that photovoltaic cell component always works in maximum power point, realize the MPPT control of photovoltaic generation.
The experiment proved that the utility model can improve the efficient of solar energy utilization ratio and a whole set of control system effectively; Isolated fault fast when the system failure, protection photovoltaic cell, the reliability and the fail safe that have improved device.
Claims (3)
1. photovoltaic MPPT control circuit; comprise inductance (L1, L2); electric capacity (C1, C2); diode D and switch S; it is characterized in that switch S includes main switch S1; auxiliary switch S2; protection switch S3; wherein protection switch S3, inductance L 1, capacitor C 1, auxiliary switch S2 are connected on the anodal circuit successively; there is diode D to be connected in parallel on the both positive and negative polarity circuit between protection switch S3 and the inductance L 1; there is main switch S1 in parallel between inductance L 1 and the capacitor C 1, has inductance L 2 in parallel between capacitor C 1 and the auxiliary switch S2, capacitor C 2 parallel connections are arranged behind the auxiliary switch S2.
2. photovoltaic MPPT control circuit as claimed in claim 1 is characterized in that described main switch S1, auxiliary switch S2, the protection switch S3 controlled device that all links to each other with the MPPT controller respectively controls.
3. photovoltaic MPPT control circuit as claimed in claim 1 or 2 is characterized in that described protection switch S3 links to each other with the photovoltaic power input circuit, and auxiliary switch S2 links to each other with power output circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201019394U CN201639517U (en) | 2010-01-26 | 2010-01-26 | Photovoltaic MPPT (Maximum Power Point Tracking) control circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010201019394U CN201639517U (en) | 2010-01-26 | 2010-01-26 | Photovoltaic MPPT (Maximum Power Point Tracking) control circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201639517U true CN201639517U (en) | 2010-11-17 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010201019394U Expired - Fee Related CN201639517U (en) | 2010-01-26 | 2010-01-26 | Photovoltaic MPPT (Maximum Power Point Tracking) control circuit |
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| CN (1) | CN201639517U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102739049A (en) * | 2012-06-08 | 2012-10-17 | 苏州市职业大学 | Two-way Boost converter |
| CN106099975A (en) * | 2016-06-30 | 2016-11-09 | 全球能源互联网研究院 | A kind of photovoltaic miniature inverter |
-
2010
- 2010-01-26 CN CN2010201019394U patent/CN201639517U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102739049A (en) * | 2012-06-08 | 2012-10-17 | 苏州市职业大学 | Two-way Boost converter |
| CN106099975A (en) * | 2016-06-30 | 2016-11-09 | 全球能源互联网研究院 | A kind of photovoltaic miniature 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 | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20101117 Termination date: 20130126 |