CN105406729A - Voltage boosting system and control method thereof - Google Patents
Voltage boosting system and control method thereof Download PDFInfo
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- CN105406729A CN105406729A CN201510962612.3A CN201510962612A CN105406729A CN 105406729 A CN105406729 A CN 105406729A CN 201510962612 A CN201510962612 A CN 201510962612A CN 105406729 A CN105406729 A CN 105406729A
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- 238000002955 isolation Methods 0.000 claims description 72
- 230000002159 abnormal effect Effects 0.000 claims description 30
- 230000009466 transformation Effects 0.000 claims description 22
- 238000012360 testing method Methods 0.000 claims description 19
- 238000010276 construction Methods 0.000 abstract description 8
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 238000005516 engineering process Methods 0.000 description 3
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
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- H02J3/383—
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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 invention discloses a voltage boosting system and a control method thereof. The voltage boosting system comprises a voltage boosting circuit, wherein the voltage boosting circuit comprises a plurality of stringed control modules; the anodes and cathodes of the output ends of the stringed control modules are connected in sequence, the anodes and cathodes at two ends after connection serve as output ends of the voltage boosting system; the input end of each stringed control module is respectively connected with the output end of the photovoltaic cell panel. According to the technical scheme provided by the invention, the anodes and cathodes of the output ends of the stringed control modules are connected in sequence and the anodes and cathodes at two ends after connection serve as output ends of the voltage boosting system, so that DC high-voltage power supplies output by the output ends of the voltage boosting system can be converted into AC high-voltage power supplies which are then connected into a high-voltage power grid; therefore, links involving AC transformers and the like in step boosting can be reduced and the construction cost of a photovoltaic and power conversion system can be lowered.
Description
Technical field
The embodiment of the present invention relates to photovoltaic electric energy switch technology field, particularly relates to a kind of booster system and control method thereof.
Background technology
At present, concentrate in photovoltaic plant the group string control module in multiple photovoltaic battery panel header box is in parallel, be low-voltage AC by photovoltaic DC-to-AC converter by power conversion again, then low-voltage AC to be boosted access electrical network step by step by AC transformer, boosting makes the equipment in the converting system of photovoltaic-electric energy complicated step by step, and construction cost is high.
Summary of the invention
The invention provides a kind of booster system and control method thereof, the DC high-voltage power supply of the output of booster system is converted to ac high voltage source, and access high-voltage fence, decrease the links such as the AC transformer of boosting step by step, reduce the construction cost of photovoltaic and electric power coversion system.
First aspect, the invention provides a kind of booster system.Described booster system, comprises booster circuit, and wherein, described booster circuit comprises multiple groups of string control modules, and the positive level of the output of multiple groups of string control modules is connected successively with negative pole, and after connecting, the positive level at two ends and negative pole are as the output of booster system; The input of each group of string control module is connected with the output of a photovoltaic battery panel respectively.
Further, described group of string control module comprises inversion unit, isolation voltage transformation unit and rectification unit, wherein, the input of described inversion unit is connected with the output of photovoltaic battery panel, the output of described inversion unit is connected with the input of described isolation voltage transformation unit, and the output of described isolation voltage transformation unit is connected with the input of described rectification unit; The output of described rectification unit is positive pole and the negative pole of the output of described group of string control module.
Further, described group of string control module comprises abnormal fly-wheel diode, it is inner that described abnormal fly-wheel diode is arranged at described group of string control module, the positive pole of described abnormal fly-wheel diode is connected with the negative pole of the output of described group of string control module, and the negative pole of described abnormal fly-wheel diode is connected with the positive pole of the output of described group of string control module.
Further, described booster system also comprises testing circuit and controller, and described controller is connected with described group of string control module; Described testing circuit is connected with described group of string control module and described controller respectively.
Second aspect, present invention also offers a kind of booster system.Described booster system, comprise booster circuit, multiple isolation fly-wheel diode and multiple isolating switch, wherein, described booster circuit comprises multiple groups of string control modules, an each group of string control module corresponding isolation fly-wheel diode and two isolating switches respectively, the positive pole of multiple isolation fly-wheel diode is connected successively with negative pole, and after connecting, the positive pole at two ends is connected with the negative pole of the output of described booster system, and after connecting, the negative pole at two ends is connected with the positive pole of the output of described booster system; The positive pole of described isolation fly-wheel diode is connected by the negative pole of isolating switch with the output of corresponding group string control module, and the negative pole of described isolation fly-wheel diode is connected by the positive pole of isolating switch with the output of corresponding group string control module; The input of each group of string control module is connected with the output of a photovoltaic battery panel respectively.
Further, described group of string control module comprises inversion unit, isolation voltage transformation unit and rectification unit, wherein, the input of described inversion unit is connected with the output of photovoltaic battery panel, the output of described inversion unit is connected with the input of described isolation voltage transformation unit, and the output of described isolation voltage transformation unit is connected with the input of described rectification unit; The output of described rectification unit is positive pole and the negative pole of the output of described group of string control module.
Further, described group of string control module comprises abnormal fly-wheel diode, it is inner that described abnormal fly-wheel diode is arranged at described group of string control module, the positive pole of described abnormal fly-wheel diode is connected with the negative pole of the output of described group of string control module, and the negative pole of described abnormal fly-wheel diode is connected with the positive pole of the output of described group of string control module.
Further, described booster system also comprises testing circuit and controller, and described controller is connected with described group of string control module; Described testing circuit is connected with described group of string control module and described controller respectively.
The third aspect, present invention also offers a kind of control method of booster system.Described booster system comprises booster circuit and voltage constant device, wherein, described booster circuit comprises multiple groups of string control modules, and the positive level of the output of multiple groups of string control modules is connected successively with negative pole, and after connecting, the positive level at two ends and negative pole are as the output of booster system; The input of each group of string control module is connected with the output of a photovoltaic battery panel respectively; Described voltage constant device is connected with the output of described booster system;
Described control method comprises:
Described voltage constant device detects the power parameter of the output of described booster system, and adjusts the power parameter of the output of described booster system, to maintain the voltage constant of the output of booster system.
Fourth aspect, present invention also offers a kind of control method of booster system.Described booster system comprises booster circuit, multiple isolation fly-wheel diode, multiple isolating switch and voltage constant device, wherein, described booster circuit comprises multiple groups of string control modules, an each group of string control module corresponding isolation fly-wheel diode and two isolating switches respectively, the positive pole of multiple isolation fly-wheel diode is connected successively with negative pole, after connecting, the positive pole at two ends is connected with the negative pole of the output of described booster system, and after connecting, the negative pole at two ends is connected with the positive pole of the output of described booster system; The positive pole of described isolation fly-wheel diode is connected by the negative pole of isolating switch with the output of corresponding group string control module, and the negative pole of described isolation fly-wheel diode is connected by the positive pole of isolating switch with the output of corresponding group string control module; The positive level of the output of each group of string control module is connected with the negative pole of described isolation fly-wheel diode, and the negative pole of the output of described group of string control module is connected with the positive pole of described isolation fly-wheel diode; The input of each group of string control module is connected with the output of a photovoltaic battery panel respectively; Described voltage constant device is connected with the output of described booster system;
Described control method comprises:
Described voltage constant device detects the power parameter of the output of described booster system, and adjusts the power parameter of the output of described booster system, to maintain the voltage constant of the output of booster system;
Described isolating switch disconnects, corresponding group string control module and described booster system power-off, and corresponding isolation fly-wheel diode and other group string control module form continuous current circuit.
Technical scheme provided by the invention, the positive level of the output of multiple groups of string control modules is connected successively with negative pole, after connecting, the positive level at two ends and negative pole are as the output of booster system, the DC high-voltage power supply of the output of booster system is converted to ac high voltage source, and access high-voltage fence, decrease the links such as the AC transformer of boosting step by step, reduce the construction cost of photovoltaic and electric power coversion system.
Accompanying drawing explanation
Fig. 1 is the structural representation of a kind of booster system that the embodiment of the present invention one provides;
Fig. 2 is the structural representation of a kind of booster system that the embodiment of the present invention two provides;
Fig. 3 is the structural representation of a kind of booster system that the embodiment of the present invention three provides.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in further detail.Be understandable that, specific embodiment described herein is only for explaining the present invention, but not limitation of the invention.It also should be noted that, for convenience of description, illustrate only part related to the present invention in accompanying drawing but not entire infrastructure.
Embodiment one
Fig. 1 is the structural representation of a kind of booster system that the embodiment of the present invention one provides.See Fig. 1, this booster system, comprises booster circuit 11, wherein, booster circuit 11 comprises multiple groups of string control modules 111, and the positive level of the output of multiple groups of string control modules 111 is connected successively with negative pole, and after connecting, the positive level at two ends and negative pole are as the output of booster system; The input of each group of string control module 111 is connected with the output of a photovoltaic battery panel 12 respectively.
Photovoltaic battery panel 12 exports DC power supply, DC power supply goes here and there control module 111 inside through inversion in group, isolation transformation and rectification, DC power supply is exported at the output of group string control module 111, when the positive level of the output of multiple groups of string control modules 111 is connected successively with negative pole, after connecting, the positive level at two ends and negative pole are as the output of booster system, namely multiple DC power supply both positive and negative polarity connects successively, the voltage of the DC power supply of the output output of booster system is the direct voltage sum of the output output of multiple groups of string control modules 111, namely the output of booster system directly will export DC high-voltage power supply, this DC high-voltage power supply is converted to ac high voltage source, and access high-voltage fence, decrease the links such as the AC transformer of boosting step by step, save the construction cost of photovoltaic and electric power coversion system.
The technical scheme that the embodiment of the present invention provides, the positive level of the output of multiple groups of string control modules is connected successively with negative pole, after connecting, the positive level at two ends and negative pole are as the output of booster system, the DC high-voltage power supply of the output of booster system is converted to ac high voltage source, and access high-voltage fence, decrease the links such as the AC transformer of boosting step by step, reduce the construction cost of photovoltaic and electric power coversion system.
Embodiment two
Fig. 2 is the structural representation of a kind of booster system that the embodiment of the present invention two provides.On the basis of embodiment one, the present embodiment is optimized further to booster system and group string control module 111.See Fig. 2, this booster system comprises booster circuit 11, controller 13 and testing circuit 14, and controller 13 and group are gone here and there the input of control module 111 and be connected; Testing circuit 14 is gone here and there control module 111 and controller 13 respectively and is connected with group.
Testing circuit 14 can the power parameter of test set string control module 111 input and output.Controller 13 can also arrange the extreme power source parameter of the output of each group of string control module 111; when the power parameter of the group string control module 111 that testing circuit 14 detects goes beyond the limit of power parameter, controller 13 can implement certain safeguard measure to corresponding group string control module 111.
Further, see Fig. 2, group string control module 111 comprises inversion unit 1111, isolation voltage transformation unit 1112 and rectification unit 1113, wherein, the input of inversion unit 1111 is connected with the output of photovoltaic battery panel 12, the output of inversion unit 1111 is connected with the input of isolation voltage transformation unit 1112, and the output of isolation voltage transformation unit 1112 is connected with the input of rectification unit 1113; The output of rectification unit 1113 is positive pole and the negative pole of the output of group string control module 111.
Further, see Fig. 2, group string control module 111 comprises abnormal fly-wheel diode 1114, it is inner that abnormal fly-wheel diode 1114 is arranged at group string control module 111, positive pole and the group of abnormal fly-wheel diode 1114 are gone here and there the negative pole of output of control module 111 and are connected, and the negative pole of abnormal fly-wheel diode 1114 and organizing is gone here and there the positive pole of output of control module 111 and is connected.
When organizing string control module 111 exception or fault quits work; abnormal fly-wheel diode 1114 conducting; abnormal fly-wheel diode 1114 forms continuous current circuit with the remainder in booster system, ensures that in booster system, other normal group string control modules 111 continue to run.
The technical scheme that the embodiment of the present invention provides; the power output completing photovoltaic battery panel by the inversion unit of group string control module, isolation voltage transformation unit and rectification unit outputs to the output of booster system; and maintain the constant of the power output of booster system by the power parameter of controller adjustment group string control module, ensured the normal operation of booster system by abnormal fly-wheel diode when organizing string control module exception or fault.
Embodiment three
Fig. 3 is the structural representation of a kind of booster system that the embodiment of the present invention three provides.See Fig. 3, this booster system, comprise booster circuit 31, multiple isolation fly-wheel diode 32 and multiple isolating switch 33, wherein, booster circuit 31 comprises multiple groups of string control modules 311, the each group of corresponding isolation fly-wheel diode 32 of string control module 311 and two isolating switches 33, the positive pole of multiple isolation fly-wheel diode 32 is connected successively with negative pole, after connecting, the positive pole at two ends is connected with the negative pole of the output of booster system, and after connecting, the negative pole at two ends is connected with the positive pole of the output of booster system; The positive pole of isolation fly-wheel diode 32 is connected with the negative pole of the output of corresponding group string control module 311 by isolating switch 33, and the negative pole of isolation fly-wheel diode 32 is connected with the positive pole of the output of corresponding group string control module 311 by isolating switch 33; The input of each group of string control module 311 is connected with the output of a photovoltaic battery panel 34 respectively.
When in booster system, respectively group string control module 311 is normal, isolating switch 33 closes, between the negative pole being carried in isolation fly-wheel diode 32 due to the forward voltage organizing string control module 311 two ends and positive pole, and the not conducting of isolation fly-wheel diode 32.The DC power supply access group string control module 311 of the output output of photovoltaic battery panel 34, DC power supply goes here and there control module 311 inside through inversion in group, isolation transformation and rectification, DC power supply is exported at the output of group string control module 311, the positive pole of isolation fly-wheel diode 32 is connected successively with negative pole, after connecting, the positive pole at two ends is connected with the negative pole of the output of booster system, after connecting, the negative pole at two ends is connected with the positive pole of the output of booster system, the voltage of the DC power supply of the output output of booster system is the direct voltage sum of the output output of multiple groups of string control modules 311, namely the output of booster system directly will export DC high-voltage power supply, this DC high-voltage power supply is converted to ac high voltage source, and access high-voltage fence, decrease the links such as the AC transformer of boosting step by step, save the construction cost of photovoltaic and electric power coversion system.
When needing repairing to one or more group string control module 311 in booster system or check, the isolating switch 33 of group string control module 311 correspondence disconnects, isolation fly-wheel diode 32 conducting of group string control module 311 correspondence, corresponding isolation fly-wheel diode 32 accesses booster system, form continuous current circuit, ensure that the normal operation of booster system.
Further, see Fig. 3, group string control module 311 comprises inversion unit 3111, isolation voltage transformation unit 3112 and rectification unit 3113, wherein, the input of inversion unit 3111 is connected with the output of photovoltaic battery panel 34, the output of inversion unit 3111 is connected with the input of isolation voltage transformation unit 3112, and the output of isolation voltage transformation unit 3112 is connected with the input of rectification unit 3113; The output of rectification unit 3113 is positive pole and the negative pole of the output of group string control module 311.
Further, see Fig. 3, group string control module 311 comprises abnormal fly-wheel diode 3114, it is inner that abnormal fly-wheel diode 3114 is arranged at group string control module 311, positive pole and the group of abnormal fly-wheel diode 3114 are gone here and there the negative pole of output of control module 311 and are connected, and the negative pole of abnormal fly-wheel diode 3114 and organizing is gone here and there the positive pole of output of control module 311 and is connected.
Further, see Fig. 3, described booster system also comprises controller 35 and testing circuit 36, and controller 35 and group are gone here and there the input of control module 311 and be connected; Testing circuit 36 is gone here and there control module 311 and controller 35 respectively and is connected with group.
Inversion unit in the present embodiment, isolation voltage transformation unit and rectification unit, abnormal fly-wheel diode, controller and testing circuit have identical function with part corresponding in embodiment two, no longer specifically describe herein.
The technical scheme that the embodiment of the present invention provides, each group of string control module in booster system be a corresponding isolation fly-wheel diode and two isolating switches respectively, the positive pole of isolation fly-wheel diode is connected successively with negative pole, after connecting, the positive pole at two ends is connected with the negative pole of the output of described booster system, after connecting, the negative pole at two ends is connected with the positive pole of the output of described booster system, the DC high-voltage power supply of the output of booster system is converted to ac high voltage source, and access high-voltage fence, decrease the links such as the AC transformer of boosting step by step, reduce the construction cost of photovoltaic and electric power coversion system, the output of group string control module is connected with fly-wheel diode two ends by isolating switch, when ensure that group string control module exits, the normal operation of booster system.
Embodiment four
Embodiments provide a kind of control method of booster system.The booster system that the method is suitable for comprises booster circuit and voltage constant device, wherein, booster circuit comprises multiple groups of string control modules, and the positive level of the output of multiple groups of string control modules is connected successively with negative pole, and after connecting, the positive level at two ends and negative pole are as the output of booster system; The input of each group of string control module is connected with the output of a photovoltaic battery panel respectively; Voltage constant device is connected with the output of described booster system.
The control method of this booster system, comprising: voltage constant device detects the power parameter of the output of booster system, and adjusts the power parameter of the output of booster system, to maintain the voltage constant of the output of booster system.
The output voltage of group string control module allows to fluctuate in a safe range, and when the output current organizing string control module is constant, the power output of group string control module also can fluctuate within the scope of one.When the output voltage of group string control module is in safe range, group string control module can ensure that photovoltaic battery panel can do large peak power output by it and outwards provide energy.When power output inconsistent of each group string control module, the output current of each group string control module is identical, and therefore under actual working state, the output voltage of group string control module is inconsistent, but as long as in safe range, it namely can continuous firing.
Voltage constant device is integrated with voltage controller, voltage detecting circuit and power parameter Circuit tuning.When the power output of some group of string control module increases, its output voltage is on the rise, then the voltage of the output of boosting rectifier control system is also on the rise, voltage constant device detects the rising change of above-mentioned voltage, for the output voltage of the output maintaining boosting rectifier control system is constant, the electric current of the output of booster system improves by voltage constant device, and the output voltage both having maintained the output of boosting rectifier control system is constant, turn improves the power output of the output of booster system.
In like manner, when the power output of some group of string control module reduces, the current parameters of constant electrical power system call interception booster system, makes the balancing work state that booster system reaches new.
In the another kind of execution mode of the present embodiment, booster system also comprises controller and testing circuit, and booster circuit comprises abnormal fly-wheel diode.The power parameter of the output of testing circuit test set string control module, when power parameter exceeds higher limit, controller control group string control module is out of service, abnormal fly-wheel diode and other organize normally and go here and there control module and form loop, booster system is normally run.
The technical scheme that the embodiment of the present invention provides, voltage constant device is according to the change of the power parameter of the output of booster system, and the power parameter of the output of adjustment booster system, to maintain the voltage constant of the output of booster system.
Embodiment five
Embodiments provide a kind of control method of booster system.The booster system that this control method is suitable for comprises booster circuit, multiple isolation fly-wheel diode, multiple isolating switch and voltage constant device, wherein, booster circuit comprises multiple groups of string control modules, an each group of string control module corresponding isolation fly-wheel diode and two isolating switches respectively, the positive pole of multiple isolation fly-wheel diode is connected successively with negative pole, after connecting, the positive pole at two ends is connected with the negative pole of the output of booster system, and after connecting, the negative pole at two ends is connected with the positive pole of the output of booster system; The positive pole of isolation fly-wheel diode is connected by the negative pole of isolating switch with the output of corresponding group string control module, and the negative pole of isolation fly-wheel diode is connected by the positive pole of isolating switch with the output of corresponding group string control module; The positive level of the output of each group of string control module is connected with the negative pole of isolation fly-wheel diode, and the negative pole of the output of group string control module is connected with the positive pole of isolation fly-wheel diode; The input of each group of string control module is connected with the output of a photovoltaic battery panel respectively; Voltage constant device is connected with the output of described booster system.The control method that the embodiment of the present invention provides comprises:
Voltage constant device detects the power parameter of the output of booster system, and adjusts the power parameter of the output of booster system, to maintain the voltage constant of the output of booster system;
Isolating switch disconnects, corresponding group string control module and booster system power-off, and corresponding isolation fly-wheel diode and other group string control module form continuous current circuit.
When in booster system, each group string control module is normal, isolating switch closes, between the negative pole being carried in isolation fly-wheel diode due to the forward voltage organizing string control module two ends and positive pole, and the not conducting of isolation fly-wheel diode.Now, the adjustable strategies of the power parameter of the output of booster system is identical with the adjustable strategies in embodiment four, no longer specifically describes herein.
Isolating switch disconnects, corresponding group string control module and booster system power-off, corresponding isolation fly-wheel diode conducting also forms continuous current circuit with other group string control module, booster system is normally run, corresponding group of string control module can be separated with booster system, can check group string control module or keep in repair.
The technical scheme that the embodiment of the present invention provides, voltage constant device is according to the change of the power parameter of the output of booster system, the power parameter of the output of adjustment booster system, to maintain the voltage constant of the output of booster system, when the isolation fly-wheel diode of isolating switch and correspondence thereof can ensure that group string control module exits, booster system is normally run.
Note, above are only preferred embodiment of the present invention and institute's application technology principle.Skilled person in the art will appreciate that and the invention is not restricted to specific embodiment described here, various obvious change can be carried out for a person skilled in the art, readjust and substitute and can not protection scope of the present invention be departed from.Therefore, although be described in further detail invention has been by above embodiment, the present invention is not limited only to above embodiment, when not departing from the present invention's design, can also comprise other Equivalent embodiments more, and scope of the present invention is determined by appended right.
Claims (10)
1. a booster system, is characterized in that, comprises booster circuit, wherein, described booster circuit comprises multiple groups of string control modules, and the positive level of the output of multiple groups of string control modules is connected successively with negative pole, and after connecting, the positive level at two ends and negative pole are as the output of booster system; The input of each group of string control module is connected with the output of a photovoltaic battery panel respectively.
2. booster system according to claim 1, it is characterized in that, described group of string control module comprises inversion unit, isolation voltage transformation unit and rectification unit, wherein, the input of described inversion unit is connected with the output of photovoltaic battery panel, the output of described inversion unit is connected with the input of described isolation voltage transformation unit, and the output of described isolation voltage transformation unit is connected with the input of described rectification unit; The output of described rectification unit is positive pole and the negative pole of the output of described group of string control module.
3. booster system according to claim 1, it is characterized in that, described group of string control module comprises abnormal fly-wheel diode, it is inner that described abnormal fly-wheel diode is arranged at described group of string control module, the positive pole of described abnormal fly-wheel diode is connected with the negative pole of the output of described group of string control module, and the negative pole of described abnormal fly-wheel diode is connected with the positive pole of the output of described group of string control module.
4. booster system according to claim 1, is characterized in that, also comprises testing circuit and controller, and described controller is connected with described group of string control module; Described testing circuit is connected with described group of string control module and described controller respectively.
5. a booster system, it is characterized in that, comprise booster circuit, multiple isolation fly-wheel diode and multiple isolating switch, wherein, described booster circuit comprises multiple groups of string control modules, an each group of string control module corresponding isolation fly-wheel diode and two isolating switches respectively, the positive pole of multiple isolation fly-wheel diode is connected successively with negative pole, after connecting, the positive pole at two ends is connected with the negative pole of the output of described booster system, and after connecting, the negative pole at two ends is connected with the positive pole of the output of described booster system; The positive pole of described isolation fly-wheel diode is connected by the negative pole of isolating switch with the output of corresponding group string control module, and the negative pole of described isolation fly-wheel diode is connected by the positive pole of isolating switch with the output of corresponding group string control module; The input of each group of string control module is connected with the output of a photovoltaic battery panel respectively.
6. booster system according to claim 5, it is characterized in that, described group of string control module comprises inversion unit, isolation voltage transformation unit and rectification unit, wherein, the input of described inversion unit is connected with the output of photovoltaic battery panel, the output of described inversion unit is connected with the input of described isolation voltage transformation unit, and the output of described isolation voltage transformation unit is connected with the input of described rectification unit; The output of described rectification unit is positive pole and the negative pole of the output of described group of string control module.
7. booster system according to claim 5, it is characterized in that, described group of string control module comprises abnormal fly-wheel diode, it is inner that described abnormal fly-wheel diode is arranged at described group of string control module, the positive pole of described abnormal fly-wheel diode is connected with the negative pole of the output of described group of string control module, and the negative pole of described abnormal fly-wheel diode is connected with the positive pole of the output of described group of string control module.
8. booster system according to claim 5, is characterized in that, also comprises testing circuit and controller, and described controller is connected with described group of string control module; Described testing circuit is connected with described group of string control module and described controller respectively.
9. the control method of a booster system, it is characterized in that, described booster system comprises booster circuit and voltage constant device, wherein, described booster circuit comprises multiple groups of string control modules, the positive level of the output of multiple groups of string control modules is connected successively with negative pole, and after connecting, the positive level at two ends and negative pole are as the output of booster system; The input of each group of string control module is connected with the output of a photovoltaic battery panel respectively; Described voltage constant device is connected with the output of described booster system;
Described control method comprises:
Described voltage constant device detects the power parameter of the output of described booster system, and adjusts the power parameter of the output of described booster system, to maintain the voltage constant of the output of booster system.
10. the control method of a booster system, it is characterized in that, described booster system comprises booster circuit, multiple isolation fly-wheel diode, multiple isolating switch and voltage constant device, wherein, described booster circuit comprises multiple groups of string control modules, an each group of string control module corresponding isolation fly-wheel diode and two isolating switches respectively, the positive pole of multiple isolation fly-wheel diode is connected successively with negative pole, after connecting, the positive pole at two ends is connected with the negative pole of the output of described booster system, after connecting, the negative pole at two ends is connected with the positive pole of the output of described booster system, the positive pole of described isolation fly-wheel diode is connected by the negative pole of isolating switch with the output of corresponding group string control module, and the negative pole of described isolation fly-wheel diode is connected by the positive pole of isolating switch with the output of corresponding group string control module, the positive level of the output of each group of string control module is connected with the negative pole of described isolation fly-wheel diode, and the negative pole of the output of described group of string control module is connected with the positive pole of described isolation fly-wheel diode, the input of each group of string control module is connected with the output of a photovoltaic battery panel respectively, described voltage constant device is connected with the output of booster system,
Described control method comprises:
Described voltage constant device detects the power parameter of the output of described booster system, and adjusts the power parameter of the output of described booster system, to maintain the voltage constant of the output of booster system;
Described isolating switch disconnects, corresponding group string control module and described booster system power-off, and corresponding isolation fly-wheel diode and other group string control module form continuous current circuit.
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| CN110113012A (en) * | 2019-05-05 | 2019-08-09 | 武汉大学 | A kind of circuit topology and method improving linear power amplifier efficiency |
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