CN203858537U - Photovoltaic power generation system maximum power point rapid tracking device - Google Patents
Photovoltaic power generation system maximum power point rapid tracking device Download PDFInfo
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- CN203858537U CN203858537U CN201420188445.2U CN201420188445U CN203858537U CN 203858537 U CN203858537 U CN 203858537U CN 201420188445 U CN201420188445 U CN 201420188445U CN 203858537 U CN203858537 U CN 203858537U
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- voltage
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- photovoltaic
- detection module
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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 provides a photovoltaic power generation system maximum power point rapid tracking device. The tracking device consists of a photovoltaic cell array, a BOOST drive circuit, a control system and a load RL, wherein one output end of the photovoltaic cell array is connected with the input end of the BOOST drive circuit by a circuit breaker SB1 and a first current shunt (1) in the control system; the other output end of the photovoltaic cell array is directly connected with the BOOST drive circuit; one output end of the BOOST drive circuit is connected with the load RL by a circuit breaker SB2 and a second current shunt (2) in the control system; the other output end of the BOOST drive circuit is directly connected with the load RL. The photovoltaic power generation system maximum power point rapid tracking device can realize the technical effect that the maximum power point of a photovoltaic power generation system is tracked, and can be applied to the field of photovoltaic power generation.
Description
Technical field
The utility model relates to field of solar thermal power generation, particularly relates to the quick tracker of a kind of maximum power point of photovoltaic power generation system.
Background technology
Along with the consumption of fossil energy, the whole world is all facing energy crisis.The energy is the basic motive of economy and society development, but due to finiteness and the nonunf ormity of conventional energy resources, causes the energy supply of most countries in the world not enough, can not meet the needs of sustainable economic development.Photovoltaic power generation technology and industry are not only an important supplement of the current energy, have more the standby potentiality that become following main energy sources source.But the cost of Photovoltaic array is high, conversion efficiency is low, expensive, the initial stage drops into larger, and its output power is subject to the impact of the factors such as intensity of sunshine, environment temperature.
In order to improve the efficiency of photovoltaic generating system, making full use of the energy that photovoltaic array produces is the basic demand of photovoltaic generating system, in present photovoltaic generating system, conventionally require the output power of photovoltaic array to remain maximum, system is wanted the maximum power point of tracking photovoltaic array in real time.
Summary of the invention
Technical problem to be solved in the utility model is: for the validity of solar electrical energy generation, provide a kind of maximum power point of photovoltaic power generation system quick tracker, this tracker is mainly for the parameter changes such as intensity of illumination, environment temperature in the situation that, can carry out dynamically following the trail of fast, thereby solve a scientific and technical difficult problem of following the trail of efficiently maximum power point.
The technical scheme that the utility model solves its technical matters employing is: photovoltaic battery array, BOOST driving circuit, control system and load RL, consist of, output one end of described photovoltaic battery array is connected with the input end of BOOST driving circuit through the first current diverter in an isolating switch SB1 and control system, and the output other end of photovoltaic battery array is directly connected with BOOST driving circuit; Second current diverter of output one end of BOOST driving circuit in another isolating switch SB2 and control system is connected with load RL, and the output other end of BOOST driving circuit is directly connected with load RL.
Described control system can be comprised of the first current diverter, the second current diverter, controller and the first DC voltage and current detection module being connected with controller respectively by 485 buses, PWM driver module, touch-screen, the second DC voltage and current detection module.
The current input terminal of the first described DC voltage and current detection module can be connected with the first current diverter, the voltage input end of the first DC voltage and current detection module can directly be connected with photovoltaic battery array output terminal, the digital output signal of the first DC voltage and current detection module can be sent into controller through 485 buses, detects the output voltage current signal of photovoltaic battery array.
The current input terminal of the second described DC voltage and current detection module can be connected with the second current diverter, the voltage input end of the second DC voltage and current detection module can be directly connected with load RL, the digital output signal of the second DC voltage and current detection module can be sent into controller through 485 buses, detects the electric current and voltage of load.
Described controller can adopt industrial Programmable Logic Controller.
One end of described PWM driver module can be connected with controller through 485 buses, and the other end of this PWM driver module can be connected with the IGBT gate pole in BOOST driving circuit.
The utility model is applied in photovoltaic generating system, when the systematic parameters such as intensity of sunshine, environment temperature change, can the new working point of fast searching, and carry out real-time analysis and the extraction of input-output power, realize tracking and the monitoring of maximum power point of photovoltaic power generation system.Combine the advantage of the quick tracking of maximum power point and Industrial Control Computer PLC, compare with existing maximum power point tracking device, have the following advantages:
1. adopt PLC as controller, signals collecting is used energy electrical power sensor, is digital signal entirely, and adopts 485 buses, and its reliability is high;
2. adopt touch-screen to show, it is visual good, and has data storage power;
3. by the parameters such as output " voltage, electric current and power " of the real-time calculating sampling of controller photovoltaic array constantly, automatically regulate the dutycycle of IGBT, thereby change the load resistance that is carried in photovoltaic array two ends, make the output impedance of its equivalent input impedance coupling photovoltaic array, the working point that fast searching is new, and carry out real-time analysis and the extraction of input-output power, follow the tracks of fast and accurately maximum power point.
Accompanying drawing explanation
Fig. 1 is the structural drawing of the quick tracker of the utility model maximum power point of photovoltaic power generation system.
In figure: 1. the first current diverter; 2. the second current diverter; 3. the first DC voltage and current detection module; 4. controller; 5.PWM driver module; 6. touch-screen; 7. the second DC voltage and current detection module.
Embodiment
Below, in conjunction with the embodiments and accompanying drawing the utility model is described in further detail, but be not limited to the utility model.
The utility model is the quick tracker of a kind of maximum power point of photovoltaic power generation system, and as shown in Figure 1, it is comprised of photovoltaic battery array, BOOST driving circuit, control system and load RL its structure.One end of photovoltaic battery array output is connected with the input end of BOOST driving circuit through isolating switch SB1, and the other end of photovoltaic battery array output is directly connected with BOOST driving circuit; Output one end of BOOST driving circuit is connected with load RL through isolating switch SB2, and the output other end of BOOST driving circuit is directly connected with load RL; Controller 4 in control system, it is connected with the first DC voltage and current detection module 3, PWM driver module 5, touch-screen 6 and the second DC voltage and current detection module 7 respectively by 485 buses.
The structure of described photovoltaic battery array as shown in dashed rectangle I, photovoltaic battery array plate that can selection standard, it can buy from the market.
The structure of described BOOST driving circuit as shown in dashed rectangle II, BOOST circuit that can selection standard, it can buy from the market.
Described control system, by the first current diverter 1, the second current diverter 2, and the first DC voltage and current detection module 3 shown in dashed rectangle III, controller 4, PWM driver module 5, touch-screen 6 and the second DC voltage and current detection module 7 compositions, play Real-Time Monitoring and control action.
The current input terminal of the first described DC voltage and current detection module 3 is connected with the first current diverter 1, the voltage input end of the first DC voltage and current detection module 3 is directly connected with the output terminal of photovoltaic battery array, the digital output signal of the first DC voltage and current detection module 3 is sent into controller 4 through 485 buses, detects the output voltage current signal of photovoltaic battery array.
Described controller 4 is cores of control system, can select industrial Programmable Logic Controller, as Siemens S7-200.
The current input terminal of the second described DC voltage and current detection module 7 is connected with the second current diverter 2, the voltage input end of the second DC voltage and current detection module 7 be directly connected with load RL, the digital output signal of the second DC voltage and current detection module 7 is sent into controller 4 through 485 buses, detects the electric current and voltage of load.
Described the first DC voltage and current detection module 3 and the second DC voltage and current detection module 7 are realized analog-digital conversion function, and the voltage and current signal that is about to detect converts digital voltage and current to.The DC parameter acquisition module WB1906**5 that this two DC voltage and currents detection module can select Mianyang City microblogging Electronics Co., Ltd. to produce.
One end 485 buses of described PWM driver module 5 are connected with controller 4, and the other end is connected with the IGBT gate pole in BOOST driving circuit; PWM drive plate that can selection standard.
Described touch-screen 6 is connected with controller 4 through 485 buses, plays the effects such as parameter setting, real-time display parameter.The MCGS touch-screen that can select Beijing Kunlun Tongtai Automation Software Technology Co., Ltd. to produce.
Described isolating switch SB1 and SB2 all play connection/disjunction effect of circuit, also have overload and short-circuit protection simultaneously; Can be according to the circuit device of selecting the size configure standard of photovoltaic battery array output current, as DZ model isolating switch.
The course of work of the present utility model is as follows:
1. closing by hand SB1, SB2;
2. give the first DC voltage and current detection module 3, controller 4, PWM driver module 5, touch-screen 6, the second DC voltage and current detection module 7 cut-in operation power supplys, controller 4 is started working.
3. the first current diverter 1 extraction output current signal of photovoltaic battery array and the output voltage signal of photovoltaic battery array are through the first DC voltage and current detection module 3, be converted to digital signal a, by RS485 bus, send into controller 4, storage after treatment, and send into touch-screen 6 demonstrations through 485 buses.
4. the current signal of load RL that the second current diverter 2 extracts and the terminal voltage signal of load RL are through the second DC voltage and current detection module 7, the digital signal b being converted to, by RS485 bus, send into controller 4, storage after treatment, and send into touch-screen 6 demonstrations through 485 buses.
5. the digital signal a that controller 4 real-time analysiss collect, calculates needed control signal.
6. control signal is converted to required PWM ripple through PWM driver module 5;
7.PWM sends into BOOST driving circuit, regulates the dutycycle of IGBT, and then changes the equiva lent impedance of BOOST circuit, to mate the output characteristics of photovoltaic array, makes photovoltaic array Maximum Power Output.
Through above-mentioned steps, realize tracking and the monitoring of maximum power point of photovoltaic power generation system.
The quick tracker of maximum power point of photovoltaic power generation system that the utility model provides, its for photovoltaic array at illuminance abrupt variation, and at partial occlusion (as cloud layer, buildings, plant etc.) complex condition such as, follow the tracks of fast and accurately maximum power point, by the output " voltage of the real-time calculating sampling of controller photovoltaic array constantly, electric current, power " etc. parameter, automatically regulate the dutycycle of IGBT, thereby change the load resistance that is carried in photovoltaic array two ends, make the output impedance of its equivalent input impedance coupling photovoltaic array, the working point that fast searching is new, and carry out real-time analysis and the extraction of input-output power, follow the tracks of fast and accurately maximum power point.
Claims (6)
1. the quick tracker of maximum power point of photovoltaic power generation system, it is characterized in that being formed by photovoltaic battery array, BOOST driving circuit, control system and load RL, output one end of described photovoltaic battery array is connected with the input end of BOOST driving circuit through the first current diverter (1) in an isolating switch SB1 and control system, and the output other end of photovoltaic battery array is directly connected with BOOST driving circuit; Second current diverter (2) of output one end of BOOST driving circuit in another isolating switch SB2 and control system is connected with load RL, and the output other end of BOOST driving circuit is directly connected with load RL.
2. the quick tracker of maximum power point of photovoltaic power generation system according to claim 1, is characterized in that: described control system is comprised of the first current diverter (1), the second current diverter (2), controller (4) and the first DC voltage and current detection module (3) being connected with controller (4) respectively by 485 buses, PWM driver module (5), touch-screen (6), the second DC voltage and current detection module (7).
3. the quick tracker of maximum power point of photovoltaic power generation system according to claim 2, it is characterized in that: the current input terminal of the first DC voltage and current detection module (3) is connected with the first current diverter (1), the voltage input end of the first DC voltage and current detection module (3) is directly connected with photovoltaic battery array output terminal, the digital output signal of the first DC voltage and current detection module (3) is sent into controller (4) through 485 buses, detects the output voltage current signal of photovoltaic battery array.
4. the quick tracker of maximum power point of photovoltaic power generation system according to claim 2, it is characterized in that: the current input terminal of the second described DC voltage and current detection module (7) is connected with the second current diverter (2), the voltage input end of the second DC voltage and current detection module (7) be directly connected with load RL, the digital output signal of the second DC voltage and current detection module (7) is sent into controller (4) through 485 buses, detects the electric current and voltage of load.
5. the quick tracker of maximum power point of photovoltaic power generation system according to claim 2, is characterized in that: described controller (4) adopts industrial Programmable Logic Controller.
6. the quick tracker of maximum power point of photovoltaic power generation system according to claim 2, it is characterized in that: one end 485 buses of described PWM driver module (5) are connected with controller (4), the other end is connected with the IGBT gate pole in BOOST driving circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420188445.2U CN203858537U (en) | 2014-04-18 | 2014-04-18 | Photovoltaic power generation system maximum power point rapid tracking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420188445.2U CN203858537U (en) | 2014-04-18 | 2014-04-18 | Photovoltaic power generation system maximum power point rapid tracking device |
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| Publication Number | Publication Date |
|---|---|
| CN203858537U true CN203858537U (en) | 2014-10-01 |
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|---|---|---|---|
| CN201420188445.2U Expired - Fee Related CN203858537U (en) | 2014-04-18 | 2014-04-18 | Photovoltaic power generation system maximum power point rapid tracking device |
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| CN (1) | CN203858537U (en) |
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2014
- 2014-04-18 CN CN201420188445.2U patent/CN203858537U/en not_active Expired - Fee Related
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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: 20141001 Termination date: 20150418 |
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| EXPY | Termination of patent right or utility model |