CN201928205U - Photovoltaic inversion system with maximum power tracking capability - Google Patents
Photovoltaic inversion system with maximum power tracking capability Download PDFInfo
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- CN201928205U CN201928205U CN 201120057567 CN201120057567U CN201928205U CN 201928205 U CN201928205 U CN 201928205U CN 201120057567 CN201120057567 CN 201120057567 CN 201120057567 U CN201120057567 U CN 201120057567U CN 201928205 U CN201928205 U CN 201928205U
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- photovoltaic
- inversion system
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- maximal power
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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
Abstract
The utility model discloses a photovoltaic inversion system with maximum power tracking capability, which is characterized in that the photovoltaic inversion system comprises a photovoltaic battery board, an acquisition circuit, a maximum power tracking unit, a drive circuit, a DC (direct current)-DC conversion circuit, a DC-AC (alternating current) inversion circuit, an inverter control circuit and a filter circuit. A Boost voltage boosting circuit of the photovoltaic inversion system with the maximum power tracking capability is realized by two stages of Boost circuits which have small volume, low cost and large voltage boosting scope; and the switch frequency of single stage of Boost circuit is reduced. A diode is additionally arranged on a bridge arm, so as to prevent the power grid transmitting electric energy to the photovoltaic battery board direction and improve the safe operation of the system.
Description
Technical field
The utility model relates to the inversion system that has maximal power tracing in the photovoltaic generating system.
Background technology
The energy is that human society exists and the important substance basis of developing, and the human at present utilization to the energy mainly is several conventional energy resources, as coal, oil, natural gas etc.According to investigations, be no more than more than 250 year at most the service life of these several main conventional energy resources, along with the continuous development of society, human demand to the energy will constantly increase, this means to alternative, regenerative resource seek extremely urgent.Solar energy more and more receives human concern with abundant, renewable, the free of contamination characteristics of its reserves, and therefore closely-related with it photovoltaic power generation technology also becomes modern scientific research personnel's research focus.At present, photovoltaic power generation technology is acknowledged as a kind of with high content of technology, the new energy technology of development prospect light.
China is maximum in the world developing country and economic pace country with fastest developing speed, the energy resource consumption growth rate also occupies first of the world, the environmental problem that therefore a large amount of energy resource consumptions bring is also serious further, add the energy extraction of China and utilize backward in technique, tradition high energy consumption industry is than great, and these have all aggravated the sternness and the urgency of China's energy substitution situation.Since the nineties, the Chinese government has been fully recognized that the photovoltaic industry future prospects for development, and includes its development in planning.According to China " the medium-term and long-term development plan of regenerative resource ", clearly by 2010, the photovoltaic generation total capacity will reach 300MW, and the year two thousand twenty reaches 1800MW.For carrying out the Party Central Committee, State Council about accelerating the strategic plan of cultivation and development strategy new industry, must deepen the understanding, hold on to the period of strategic opportunity of photovoltaic generation industry development, further promote domestic photovoltaic generation scale and use.As seen the Chinese government attaches great importance to the development of following photovoltaic industry.
We know, the operation principle of photovoltaic cell is a photovoltaic effect, its photoelectric conversion efficiency is limited, the output characteristic of photovoltaic cell is subject to the external environment influence simultaneously, its maximum power point is in change constantly, therefore for improving the photovoltaic system generating efficiency, need to consider the MPPT maximum power point tracking control of photovoltaic cell.At present in the application of photovoltaic DC-to-AC converter, be subjected to cost and technology limitation, what have the MPPT maximum power point tracking function is not a lot, and existing MPPT control technology also has many technical barriers at aspects such as tracking accuracy and tracking velocities, and these all can influence the operating efficiency of system.
The utility model content
The purpose of this utility model is to solve above-mentioned the deficiencies in the prior art and problem, a kind of maximal power tracing system based on advanced algorithm is provided, it collects the photovoltaic battery panel voltage and current among the DSP, adopts the maximum power algorithm to realize the power output maximum.
The utility model adopts following technical scheme for achieving the above object:
A kind of photovoltaic inversion system of the utility model with maximal power tracing, it is characterized in that comprising photovoltaic battery panel, Acquisition Circuit, the maximal power tracing unit, drive circuit, the DC-DC translation circuit, the DC-AC inverter circuit, inverter control circuit and filter circuit, the output of photovoltaic battery panel connects the input of Acquisition Circuit and DC-DC translation circuit respectively, connect the input of inverter control circuit and filter circuit behind the output serial connection DC-AC inverter circuit of DC-DC translation circuit respectively, connect the input of inverter control circuit behind the output serial connection maximal power tracing unit of Acquisition Circuit, connect the input of DC-DC translation circuit behind the maximal power tracing unit serial connection drive circuit, connect the input of DC-AC translation circuit behind the output serial connection drive circuit of inverter control circuit.
Preferably, Acquisition Circuit is made up of voltage sensor and Hall current sensor, and voltage sensor and Hall current sensor directly are connected photovoltaic battery panel output dc bus side.
Preferably, inverter control circuit is made up of digital signal processor DSP.
The utlity model has following beneficial effect: the utility model adopts two joint Boost circuit to realize boosting, and has reduced the system switching loss, improves system's boost capability; The utility model adopts variable step to approach one by one based on the maximal power tracing of photovoltaic generating system, make the lasting accuracy and the speed of MPPT maximum power point tracking increase, reduce system oscillation, maximum stable power can be well obtained, and the requirement of system's maximal power tracing can be satisfied fully; The utility model becomes alternating current by inverter circuit with the dc inverter that photovoltaic cell is operated in maximum power point.
Description of drawings
Fig. 1 is the photovoltaic inversion system schematic diagram with maximal power tracing of the present utility model, among Fig. 1: 1-PV battery, 2-Acquisition Circuit, 3-maximal power tracing, 4-drive circuit, 5-DC-DC translation circuit, 6-DC-AC inverter circuit, 7-inverter control circuit, 8-filter circuit.
Fig. 2 is a system, control circuit.
Fig. 3 is a two-stage Boost booster circuit.
Fig. 4 is an inverter circuit.
Embodiment
Below in conjunction with accompanying drawing the utility model technology contents is explained:
As shown in Figure 1 and Figure 2, the utlity model has the photovoltaic inversion system of maximal power tracing, it mainly is made of photovoltaic battery panel electric current and voltage acquisition unit, electric current and voltage modulate circuit, algorithm controls unit, drive circuit and Boost boosting unit, sampling unit is connected photovoltaic battery panel output dc bus side, have the current regulating circuit to connect between sampling unit, the control unit, the Boost booster circuit drives by algorithm controls.Voltage sensor and Hall current sensor directly are connected photovoltaic battery panel output dc bus side, are connected with digital signal processor DSP by voltage, current regulating circuit.The voltage, the current signal that collect are stored among the DSP, and by electric current and the voltage of gathering is come rated output, relatively the variable power situation is controlled PWM output transfer Boost circuit and is boosted.Because the DSP output signal level is too low, drive the Boost circuit inadequately and realize boosting, so DSP output control signal there is driving to amplify.Chip for driving in this patent is selected IR2110, and American I R company produces, and has the advantage of light-coupled isolation and electromagnetic isolation concurrently, realizes Signal Spacing and the amplification of DSP output signal to the Boost circuit.
The photovoltaic inversion system Boost booster circuit that the utlity model has maximal power tracing realizes that by two-stage Boost circuit the little one-tenth of two-stage Boost volume is not low, and the scope of boosting is big, and has reduced the switching frequency that single-stage Boost boosts.As shown in Figure 3, the control signal of two-stage Boost is all provided by DSP.
As shown in Figure 4, the inverter circuit that the utlity model has the photovoltaic inversion system of maximal power tracing adopts single-phase full-controlled bridge inverter circuit.On brachium pontis, add diode, prevent electrical network, improve the safety operation of system to photovoltaic battery panel direction transmission of electric energy.
When implementing, the photovoltaic battery panel output voltage is a direct current, and sampling unit working voltage transducer device detects the voltage of photovoltaic battery panel, uses Hall current sensor to detect the electric current of photovoltaic battery panel.Because what control unit used is dsp chip, the A/D converter that carries on its sheet is unipolar, the voltage signal that can only receive, yet current detection signal is ambipolar, so the current signal by Hall current sensor output must convert voltage signal to through sampling resistor, and then within the scope that voltage transformation is arrived through a dc bias circuit, could be connected with the DSP2812 of control unit like this.Therefore gather voltage, electric current need be changed, could be connected with the DSP of control unit like this.Realize the maximal power tracing algorithm in DSP, by drive circuit, control PWM output adjustment Boost circuit boosts, and realizes maximum power output, realizes that by inverter circuit direct current is transformed to alternating current.
Claims (3)
1. photovoltaic inversion system with maximal power tracing, it is characterized in that comprising photovoltaic battery panel (1), Acquisition Circuit (2), maximal power tracing unit (3), drive circuit (4), DC-DC translation circuit (5), DC-AC inverter circuit (6), inverter control circuit (7) and filter circuit (8), the output of photovoltaic battery panel (1) connects the input of Acquisition Circuit (2) and DC-DC translation circuit (5) respectively, connect the input of inverter control circuit (7) and filter circuit (8) behind the output serial connection DC-AC inverter circuit (6) of DC-DC translation circuit (5) respectively, connect the input of inverter control circuit (7) behind the output serial connection maximal power tracing unit (3) of Acquisition Circuit (2), connect the input of DC-DC translation circuit (5) behind maximal power tracing unit (3) the serial connection drive circuit (4), connect the input of DC-AC translation circuit (5) behind the output serial connection drive circuit (4) of inverter control circuit (7).
2. a kind of photovoltaic inversion system according to claim 1 with maximal power tracing, it is characterized in that Acquisition Circuit (2) is made up of voltage sensor and Hall current sensor, voltage sensor and Hall current sensor directly are connected photovoltaic battery panel (1) output dc bus side.
3. a kind of photovoltaic inversion system with maximal power tracing according to claim 1 is characterized in that inverter control circuit (7) is made up of digital signal processor DSP.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120057567 CN201928205U (en) | 2011-03-07 | 2011-03-07 | Photovoltaic inversion system with maximum power tracking capability |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201120057567 CN201928205U (en) | 2011-03-07 | 2011-03-07 | Photovoltaic inversion system with maximum power tracking capability |
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| CN201928205U true CN201928205U (en) | 2011-08-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201120057567 Expired - Fee Related CN201928205U (en) | 2011-03-07 | 2011-03-07 | Photovoltaic inversion system with maximum power tracking capability |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102651087A (en) * | 2011-08-30 | 2012-08-29 | 广西南宁华泰德隆资讯科技有限公司 | Maximum power point-tracking photovoltaic system based on ant colony-artificial immune hybrid optimization algorithm |
| CN102983373A (en) * | 2012-11-12 | 2013-03-20 | 深圳市沛城电子科技有限公司 | Charging method and device |
| CN103677064A (en) * | 2011-09-06 | 2014-03-26 | 摩根阳光公司 | Multi-dimensional maximum power point tracking |
| CN104348389A (en) * | 2013-08-07 | 2015-02-11 | 广州市香港科大霍英东研究院 | Wind power generation controller |
| CN111049382A (en) * | 2019-12-31 | 2020-04-21 | 广州金升阳科技有限公司 | BUCK control circuit and control method thereof |
| CN115864795A (en) * | 2023-02-28 | 2023-03-28 | 昱能科技股份有限公司 | Control method of primary inverter circuit, electronic equipment and readable storage medium |
-
2011
- 2011-03-07 CN CN 201120057567 patent/CN201928205U/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102651087A (en) * | 2011-08-30 | 2012-08-29 | 广西南宁华泰德隆资讯科技有限公司 | Maximum power point-tracking photovoltaic system based on ant colony-artificial immune hybrid optimization algorithm |
| CN103677064A (en) * | 2011-09-06 | 2014-03-26 | 摩根阳光公司 | Multi-dimensional maximum power point tracking |
| CN103677064B (en) * | 2011-09-06 | 2017-05-17 | 摩根阳光公司 | Multi-dimensional maximum power point tracking |
| CN102983373A (en) * | 2012-11-12 | 2013-03-20 | 深圳市沛城电子科技有限公司 | Charging method and device |
| CN102983373B (en) * | 2012-11-12 | 2015-01-07 | 深圳市沛城电子科技有限公司 | Charging method and device |
| CN104348389A (en) * | 2013-08-07 | 2015-02-11 | 广州市香港科大霍英东研究院 | Wind power generation controller |
| CN104348389B (en) * | 2013-08-07 | 2018-08-28 | 广州市香港科大霍英东研究院 | Wind power generation controller |
| CN111049382A (en) * | 2019-12-31 | 2020-04-21 | 广州金升阳科技有限公司 | BUCK control circuit and control method thereof |
| CN115864795A (en) * | 2023-02-28 | 2023-03-28 | 昱能科技股份有限公司 | Control method of primary inverter circuit, electronic equipment and readable storage medium |
| CN115864795B (en) * | 2023-02-28 | 2023-05-05 | 昱能科技股份有限公司 | Control method of primary inverter circuit, electronic equipment and readable storage medium |
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| Date | Code | Title | Description |
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| 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: 20110810 Termination date: 20140307 |