CN105573399A - Maximum power tracing control device - Google Patents
Maximum power tracing control device Download PDFInfo
- Publication number
- CN105573399A CN105573399A CN201410549493.4A CN201410549493A CN105573399A CN 105573399 A CN105573399 A CN 105573399A CN 201410549493 A CN201410549493 A CN 201410549493A CN 105573399 A CN105573399 A CN 105573399A
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- China
- Prior art keywords
- circuit
- power tracing
- control circuit
- maximal power
- resonant transform
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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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- Photovoltaic Devices (AREA)
Abstract
The invention discloses a maximum power tracing control device, and relates to the technical field of solar photovoltaic power generation. The device comprises a photovoltaic cell, a voltage sampling circuit, a current sampling circuit, a maximum power tracing control circuit, a drive and control circuit, and a resonant transformation circuit. The photovoltaic cell is connected with the maximum power tracing control circuit through the voltage sampling circuit and the current sampling circuit. The output of the photovoltaic cell is connected with the input of the resonant transformation circuit. The output of the resonant transformation circuit is connected with the maximum power tracing control circuit. The output of the maximum power tracing control circuit is connected with the input of the drive and control circuit. The output of the drive and control circuit is connected with the resonant transformation circuit. The maximum power tracing control device solves a problem of maximum power tracing of some low-power devices, and the whole circuit is low in cost, the circuit is simple and easy to realize. Through frequency conversion control, conversion efficiency of the photovoltaic cell is effectively improved.
Description
Technical field
The present invention relates to solar photovoltaic technology field, especially relate to a kind of maximal power tracing controlling apparatus.
Background technology
The output power of photovoltaic cell can affect by intensity of illumination, temperature, in order to make photovoltaic cell in any environment all can with maximum power output, promote its utilization ratio, must control the instantaneous output of photovoltaic cell, be exactly so-called maximum power point tracking (MPPT), maximal power tracing (MPPT) is the important gordian technique of in generating electricity by way of merging two or more grid systems, and it refers to that the output voltage of control break solar cell array or the method for electric current make array always work on maximum power point.But the maximal power tracing of some photovoltaic cell low-power equipments is difficult to realize, and maximal power tracing control circuit to realize cost higher.
Summary of the invention
The object of the invention is the problems referred to above existed to solve prior art, provide a kind of maximal power tracing controlling apparatus, this maximal power tracing controlling apparatus solves the problem of the maximal power tracing difficulty of some photovoltaic cell low-power equipments, and the cost of whole circuit is low, circuit is simple and be easy to realize; Can variable frequency control be passed through, effectively improve the conversion efficiency of photovoltaic cell.
The object of the invention is to be achieved through the following technical solutions:
A kind of maximal power tracing controlling apparatus, comprises photovoltaic cell, voltage sampling circuit, current sampling circuit, maximal power tracing control circuit, Drive and Control Circuit and resonant transform circuit; Described photovoltaic cell is connected with maximal power tracing control circuit with current sampling circuit by voltage sampling circuit; Photovoltaic cell exports and is connected with the input of resonant transform circuit; Resonant transform circuit exports and is connected with maximal power tracing control circuit; Maximal power tracing circuit exports and is connected with Drive and Control Circuit input; Drive and Control Circuit exports and is connected with resonant transform circuit.
Described resonant transform circuit is LLC resonant transform circuit.
The output voltage of described LLC resonant transform circuit increases, and maximal power tracing control circuit exports and controls drive singal, increases the output voltage that resonance frequency reduces resonant transform circuit; The output voltage of resonant transform circuit reduces, and maximal power tracing control circuit exports and controls drive singal, reduces the output voltage that resonance frequency increases resonant transform circuit.
The core of described maximal power tracing control circuit is microprocessor.
Described microprocessor is DSP2812.
Beneficial effect of the present invention is: a kind of maximal power tracing controlling apparatus, solve the problem of the maximal power tracing difficulty of some photovoltaic cell low-power equipments, and the cost of whole circuit is low, and circuit is simple and be easy to realize; By variable frequency control, effectively improve the conversion efficiency of photovoltaic cell.
Accompanying drawing explanation
Below in conjunction with the drawings and specific embodiments, the present invention will be further described:
Fig. 1 is the theory diagram of maximal power tracing controlling apparatus of the present invention.
Embodiment
The technological means realized to make the present invention, creation characteristic, reaching object and effect is easy to understand, below in conjunction with concrete diagram, setting forth the present invention further.
Describe the present invention in detail below with reference to Fig. 1, a kind of maximal power tracing controlling apparatus, comprise photovoltaic cell 1, voltage sampling circuit 2, current sampling circuit 3, maximal power tracing control circuit 4, Drive and Control Circuit 5 and LLC resonant transform circuit 6.
Photovoltaic cell 1 is connected with maximal power tracing control circuit 4 with current sampling circuit 3 by voltage sampling circuit 2; Photovoltaic cell 1 exports and is connected with the input of LLC resonant transform circuit 6; The output of maximal power tracing circuit 4 inputs with Drive and Control Circuit 5 and is connected, and Drive and Control Circuit 5 exports the power tube of control LLC resonant transform circuit 6; The output voltage of LLC resonant transform circuit 6 is connected with maximal power tracing control circuit 4; The core of maximal power tracing control circuit 4 is microprocessors, and microprocessor is DSP2812.
During concrete enforcement, maximal power tracing control circuit carries out real-time sampling by voltage sampling circuit and current sampling circuit to the voltage of photovoltaic cell, electric current; Maximal power tracing control circuit is also sampled to the output voltage of LLC resonant transform circuit.Maximal power tracing control circuit outputs a control signal to Drive and Control Circuit by maximal power tracing control algolithm, maximal power tracing control circuit output signal is by the drive amplification of Drive and Control Circuit, the power tube of control LLC resonant transform circuit, the energy of photovoltaic cell becomes galvanic current by LLC resonant transform circuit.Maximal power tracing controlling apparatus, makes the output DC voltage stability of LLC resonant transform circuit by variable frequency control.If the output voltage of LLC resonant transform circuit raises, maximal power tracing control circuit controls drive singal, reduces the output voltage of resonant transform circuit by increasing resonance frequency; If the output voltage of LLC resonant transform circuit reduces, maximal power tracing control circuit controls drive singal, increases the output voltage of resonant transform circuit by reducing resonance frequency, thus reaches most power tracking and control to make output voltage stabilization.
Maximal power tracing controlling apparatus of the present invention, solve the problem of the maximal power tracing difficulty of some photovoltaic cell low-power equipments, and the cost of whole circuit is low, and circuit is simple and be easy to realize; By variable frequency control, effectively improve the conversion efficiency of photovoltaic cell.
More than show and describe ultimate principle of the present invention, principal character and advantage of the present invention.The technician of the industry should understand; the present invention is not restricted to the described embodiments; what describe in above-described embodiment and instructions just illustrates principle of the present invention; the present invention also has various changes and modifications without departing from the spirit and scope of the present invention, and these changes and improvements all fall in the claimed scope of the invention.Application claims protection domain is defined by appending claims and equivalent thereof.
Claims (5)
1. a maximal power tracing controlling apparatus, is characterized in that: comprise photovoltaic cell, voltage sampling circuit, current sampling circuit, maximal power tracing control circuit, Drive and Control Circuit and resonant transform circuit; Described photovoltaic cell is connected with maximal power tracing control circuit with current sampling circuit by voltage sampling circuit; Photovoltaic cell exports and is connected with the input of resonant transform circuit; Resonant transform circuit exports and is connected with maximal power tracing control circuit; Maximal power tracing circuit exports and is connected with Drive and Control Circuit input; Drive and Control Circuit exports and is connected with resonant transform circuit.
2. according to a kind of maximal power tracing controlling apparatus according to claim 1, it is characterized in that: described resonant transform circuit is LLC resonant transform circuit.
3. according to a kind of maximal power tracing controlling apparatus according to claim 2, it is characterized in that: the output voltage of described LLC resonant transform circuit increases, maximal power tracing control circuit exports and controls drive singal, increases the output voltage that resonance frequency reduces resonant transform circuit; The output voltage of resonant transform circuit reduces, and maximal power tracing control circuit exports and controls drive singal, reduces the output voltage that resonance frequency increases resonant transform circuit.
4. according to a kind of maximal power tracing controlling apparatus according to claim 1, it is characterized in that: the core of described maximal power tracing control circuit is microprocessor.
5. according to a kind of maximal power tracing controlling apparatus according to claim 4, it is characterized in that: described microprocessor is DSP2812.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410549493.4A CN105573399A (en) | 2014-10-16 | 2014-10-16 | Maximum power tracing control device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410549493.4A CN105573399A (en) | 2014-10-16 | 2014-10-16 | Maximum power tracing control device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105573399A true CN105573399A (en) | 2016-05-11 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410549493.4A Pending CN105573399A (en) | 2014-10-16 | 2014-10-16 | Maximum power tracing control device |
Country Status (1)
| Country | Link |
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| CN (1) | CN105573399A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111949064A (en) * | 2020-06-30 | 2020-11-17 | 上海空间电源研究所 | Analog control system circuit for realizing high-precision MPPT technology |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011072137A (en) * | 2009-09-25 | 2011-04-07 | Panasonic Electric Works Co Ltd | Grid-connected inverter device |
| GB2496139A (en) * | 2011-11-01 | 2013-05-08 | Enecsys Ltd | Photovoltaic power conditioning circuit |
| CN103208937A (en) * | 2013-03-19 | 2013-07-17 | 广东工业大学 | Single-phase photovoltaic grid-connected inverter |
| CN103401463A (en) * | 2013-07-25 | 2013-11-20 | 天津大学 | Miniature photovoltaic grid-connected inverter with optimized DC (Direct Current) bus capacitor and control method |
| CN204143290U (en) * | 2014-10-16 | 2015-02-04 | 池州学院 | A kind of maximal power tracing controlling apparatus |
-
2014
- 2014-10-16 CN CN201410549493.4A patent/CN105573399A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011072137A (en) * | 2009-09-25 | 2011-04-07 | Panasonic Electric Works Co Ltd | Grid-connected inverter device |
| GB2496139A (en) * | 2011-11-01 | 2013-05-08 | Enecsys Ltd | Photovoltaic power conditioning circuit |
| CN103208937A (en) * | 2013-03-19 | 2013-07-17 | 广东工业大学 | Single-phase photovoltaic grid-connected inverter |
| CN103401463A (en) * | 2013-07-25 | 2013-11-20 | 天津大学 | Miniature photovoltaic grid-connected inverter with optimized DC (Direct Current) bus capacitor and control method |
| CN204143290U (en) * | 2014-10-16 | 2015-02-04 | 池州学院 | A kind of maximal power tracing controlling apparatus |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111949064A (en) * | 2020-06-30 | 2020-11-17 | 上海空间电源研究所 | Analog control system circuit for realizing high-precision MPPT technology |
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| PB01 | Publication | ||
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| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160511 |