CN102611355A - Photovoltaic array combiner box - Google Patents

Photovoltaic array combiner box Download PDF

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Publication number
CN102611355A
CN102611355A CN2012100668979A CN201210066897A CN102611355A CN 102611355 A CN102611355 A CN 102611355A CN 2012100668979 A CN2012100668979 A CN 2012100668979A CN 201210066897 A CN201210066897 A CN 201210066897A CN 102611355 A CN102611355 A CN 102611355A
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China
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voltage
branch road
module
direct current
road
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CN2012100668979A
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CN102611355B (en
Inventor
张新涛
刘伟增
羊睦汉
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TBEA Xinjiang Sunoasis Co Ltd
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TBEA Xinjiang Sunoasis Co Ltd
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02EREDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
    • Y02E10/00Energy generation through renewable energy sources
    • Y02E10/50Photovoltaic [PV] energy

Abstract

The invention provides a photovoltaic array combiner box which comprises multiple DC (direct current) input branches, wherein the multiple DC input branches are connected in parallel and then combined into one DC output; and each branch has a maximum power tracking function so as to work at respective maximum power point. The combiner box also comprises multiple voltage compensation units connected in series with the branches respectively, and a comparison calculation unit, wherein the comparison calculation unit is used for comparing to obtain the maximum value of voltage at the maximum power point of each branch, calculating the difference between the maximum value and the voltage value at each maximum power point respectively, and outputting the difference to the voltage compensation unit corresponding to each branch respectively; and the voltage compensation unit is used for performing voltage compensation for the corresponding branch according to the difference so that the output voltage of the branch is equal to the maximum value. The photovoltaic array combiner box provided by the invention can ensure that each branch still can output voltage at respective maximum power after the output is combined, thus the total output power of the combiner box reaches the maximum.

Description

A kind of photovoltaic array header box
Technical field
The invention belongs to the photovoltaic power generation technology field, be specifically related to a kind of photovoltaic array header box.
Background technology
Along with starting of parallel network power generation technology; For fairly large grid-connected photovoltaic system; In order to reduce the connecting line between photovoltaic module (solar cell) and the combining inverter; Maintain easily; Need between photovoltaic module and combining inverter, to increase photovoltaic array direct current collector-shoe gear (being the photovoltaic array header box), its effect is that the photovoltaic array of some (solar cell tandem) is confluxed into the output of one road direct current, is to transfer to electric power transmission network behind the alternating current by the dc inverter of combining inverter after with said confluxing then.
In order to improve the whole efficiency of grid-connected photovoltaic system; Existing photovoltaic combining inverter generally has maximal power tracing (MPPT; Maximum Power PointTracking) function; Be used for the input power to said inverter, promptly the power output of photovoltaic array header box is carried out maximal power tracing.But the large-scale photovoltaic grid-connected system all is made up of high-power combining inverter; It is used for the numerous roads photovoltaic array that imports (is for example carried out inversion; The 500KW combining inverter be generally used for to import 70 the tunnel, the photovoltaic array of every road 10A carries out inversion); And the high-power photovoltaic synchronization inverter can only carry out maximal power tracing to total output of the photovoltaic array of all remittance; And can't carry out maximal power tracing to each branch road of photovoltaic array, and that is to say that the maximal power tracing function of said inverter can only realize the gross power of header box output is followed the tracks of, its maximum power point that traces into is a mean value; Though this maximum power tracking method has certain effect to improving solar energy utilization rate; But,, there is illumination difference etc. between the photovoltaic module because there is batch manufacturing variation in the photovoltaic module that photovoltaic module manufacturer makes for each branch road of photovoltaic array of input header box; Make that the peak power output point of each photovoltaic array branch road is different; If the gross output that each branch road of photovoltaic array all traces into by combining inverter (being average maximum power) work then can make some photovoltaic array branch road not be operated in the maximum power point place of this branch road, make that the solar energy utilization rate in the photovoltaic generating system does not reach maximum.
To above problem; Prior art has proposed again multiple the photovoltaic array header box respectively to be imported the method that branch road (promptly importing each branch road of photovoltaic array of header box) carries out maximal power tracing; Be used for each input branch road is carried out maximal power tracing respectively, make that respectively importing branch road all is operated in maximum power point place separately.For example can realize respectively importing the maximal power tracing of branch road through the method that in each input branch road, adds the DC/DC boost module respectively; Said DC/DC boost module can adopt existing Boost booster circuit; It comprises switching tube and energy storage inductor; Each imports the magnitude of voltage of branch road according to its maximal power tracing that traces into some place; Adopt the Boost booster circuit that the output voltage of each input branch road is boosted to the magnitude of voltage at the maximum power point place of this branch road respectively, thereby each input branch road is all exported with maximum power.
But in fact, no matter be employed in respectively import add the DC/DC boost module respectively in the branch road and realize respectively import the branch road maximum power tracking method, that still adopts other respectively imports the branch road maximum power tracking method, still has following problem:
Because the maximum power point of each input branch road is also inequality; If make that through the existing branch road maximum power tracking method of respectively importing respectively importing branch road all is operated in maximum power point place separately; After then respectively importing the bus-bar parallel connection output of branch road in header box; Because the magnitude of voltage (being d-c bus voltage value) on the bus-bar is an integrated value of all parallelly connected input branch voltages; Also just make the operating voltage of respectively importing branch road become the magnitude of voltage on the bus-bar; Rather than respectively imported the magnitude of voltage at the original maximum power point place of branch road, so the power output that header box is respectively imported branch road do not reach maximum, thus cause the gross output of header box also can't reach maximum.
Summary of the invention
Technical problem to be solved by this invention is to existing above-mentioned defective in the prior art; A kind of photovoltaic array header box is provided; This header box is respectively imported on the basis that branch road all has the maximal power tracing function at it; Make each input branch road after confluxing, still can export, efficiently solve the different power outputs of respectively importing branch road that make of maximum power point of respectively importing branch road because of header box and after confluxing, can't reach the problem of maximum with maximum power.
Solving the technical scheme that technical problem of the present invention adopted is:
Said photovoltaic array header box comprises multi-channel DC input branch road; Conflux into the output of one road direct current after the parallel connection of said multi-channel DC input branch road; Every road direct current input branch road all possesses the maximal power tracing function, makes every road direct current input branch road all be operated in maximum power point place separately, and said header box also comprises a plurality of voltage compensations unit of connecting with said multi-channel DC input branch road respectively; And comparison computing unit
Said relatively computing unit is used for relatively drawing the maximum of each road direct current input branch road maximum power point place voltage; Calculate maximum power point place magnitude of voltage poor of maximum and each road direct current input branch road of said voltage then respectively, and export said difference to each corresponding place, voltage compensation unit of direct current input branch road, road respectively;
The quantity of said voltage compensation unit equates with the quantity of direct current input branch road, is used for according to said difference its corresponding direct current input branch road being carried out voltage compensation, and the output voltage values that makes this road direct current import branch road equals the maximum of said voltage.
Preferably, said relatively computing unit comprises comparison module and computing module,
The input of said comparison module links to each other with the output of said multi-channel DC input branch road; Be used for the maximum power point place voltage that said multi-channel DC input branch road carries out respectively obtaining behind the maximal power tracing is compared and analyzes; Draw maximum wherein as the conflux d-c bus voltage value of output of this header box, and the maximum power point place magnitude of voltage that said d-c bus voltage value and each road direct current are imported branch road exports computing module in real time to;
The output of said computing module links to each other with said a plurality of voltage compensations unit; Be used to calculate maximum power point place magnitude of voltage poor of said d-c bus voltage value and each road direct current input branch road, and export said difference to each corresponding place, voltage compensation unit of direct current input branch road, road respectively.
Preferably, said each voltage compensation unit includes voltage regulating module and control module,
Said control module links to each other with computing module in the computing unit relatively, is used for exporting the magnitude of voltage that equates with said difference according to the corresponding difference control voltage regulating module in this voltage compensation unit.
Further preferably, said voltage regulating module comprises first switching tube, second switch pipe, inductance and electric capacity,
The drain electrode of said first switching tube links to each other with the electrode input end of this voltage regulating module; The source electrode of first switching tube links to each other with the drain electrode of second switch pipe; The drain electrode of second switch pipe links to each other with the negative input of this voltage regulating module, and the input of said inductance links to each other with the series connection node of first switching tube and second switch pipe, and the output of inductance links to each other with the negative pole of electric capacity; The positive pole of electric capacity links to each other with the drain electrode of first switching tube, and the output positive and negative charge of this voltage regulating module links to each other with the both positive and negative polarity of electric capacity respectively;
Said control module is regulated the magnitude of voltage that said voltage regulating module is exported through the duty cycle of switching of controlling first switching tube and second switch pipe, and this magnitude of voltage is equated with said difference.
Preferably, said voltage compensation unit also comprises inversion module, step-down module and rectification module,
The output of the direct current input branch road that the input of said inversion module is corresponding with this voltage compensation unit links to each other, and the dc inverter that is used for this branch road of input is an alternating current;
The input of said step-down module links to each other with the output of inversion module, is used for said alternating current is carried out step-down;
The input of said rectification module links to each other with the output of step-down module, is used for the AC rectification after the said step-down is become unidirectional pulsating nature direct current;
The input of said voltage regulating module links to each other with the output of rectification module, is used for said unidirectional pulsating nature direct current is carried out pressure regulation as power supply and according to the control signal of control module output.
Further preferably, said inversion module adopts inverter circuit; Said rectification module adopts rectification circuit; Said step-down module adopts isolating transformer.
Preferably, said header box also comprises a plurality of first circuit protection units, and its output that is connected on each road direct current input branch road is respectively imported between the corresponding voltage compensation unit of branch road with each road direct current, is used for this header box is carried out overcurrent protection.
Further preferably, said first circuit protection unit adopts fuse.
Preferably, said header box also comprises the second circuit protected location, and it links to each other with the output of said header box, is used for this header box is transshipped and short-circuit protection.
Further preferably, said second circuit protected location adopts dc circuit breaker.
Beneficial effect:
Photovoltaic array header box according to the invention all has on the basis of maximal power tracing function at its each direct current input branch road; Through the voltage compensation unit of on every road direct current input branch road, all connecting; Be used to compensate this road direct current input branch road maximum power point place's voltage and the header box difference between the DC bus-bar voltage of exporting of confluxing; Make every road direct current input branch road after confluxing, still can export with maximum power; And the DC bus-bar voltage maximum power point place voltage change of each road direct current input branch road originally that can not cause confluxing because of the maximum power point place voltage difference of each road direct current input branch road and export; Thereby make the gross output of this header box reach maximum, improved the whole efficiency of grid-connected photovoltaic system effectively.
Can know through actual detected; The loss late that adopts the grid-connected photovoltaic system that does not possess maximal power tracing function photovoltaic array header box is up to 3%; Adopt existing loss late to be reduced to 2%, and adopt the loss late of the grid-connected photovoltaic system of photovoltaic array header box according to the invention to have only about 1% with grid-connected photovoltaic system of maximal power tracing function photovoltaic array header box.
Owing to be more or less the same between the maximum power point place voltage of each road direct current input branch road of header box of the present invention; Requirement to the power output that is connected on the voltage compensation unit on each road direct current input branch road is also just lower; Therefore said voltage compensation unit can (be tens volts voltage like the voltage step-down rectification with several hectovolts on this branch road to pressure regulation again after this branch road elder generation step-down; Carry out pressure regulation to said tens volts voltage again); Make that the operating voltage and the operating current of switching tube and inductance in the voltage regulating module, electric capacity are all very little; So the thermal losses in this voltage compensation element circuit is very little, has simplified the Thermal structures design of this voltage compensation element circuit and the type selecting of device.
Description of drawings
Fig. 1 is the structural representation of photovoltaic array header box in the embodiment of the invention 1;
Fig. 2 is the sketch map that is connected of computing unit and voltage compensation unit relatively among Fig. 1;
Fig. 3 is the circuit theory sketch map of voltage compensation unit in the embodiment of the invention 1;
Fig. 4 is the circuit theory sketch map of photovoltaic array header box in the embodiment of the invention 1;
Fig. 5 is the control flow sketch map of photovoltaic array header box in the embodiment of the invention 1.
Embodiment
For making those skilled in the art understand technical scheme of the present invention better, photovoltaic array header box of the present invention is described in further detail below in conjunction with accompanying drawing and embodiment.
Embodiment 1:
As shown in Figure 1, said photovoltaic array header box comprises multi-channel DC input branch road, a plurality of voltage compensations unit and comparison computing unit.Wherein, said every road direct current input branch road all possesses the maximal power tracing function.Here; The maximal power tracing function that possesses said direct current input branch road can adopt the existing branch road of respectively importing at the photovoltaic array header box to add the DC/DC boost module respectively and realize, can certainly adopt other the module that can realize the maximal power tracing function to realize.
Conflux into the output of one road direct current after the parallel connection of said multi-channel DC input branch road, the Cheng Yilu that confluxes after can adopting bus-bar with the parallel connection of said multi-channel DC input branch road, preferred said bus-bar adopts confluence copper bar.The both positive and negative polarity of wherein every road direct current input branch road input links to each other with the both positive and negative polarity of a photovoltaic array (solar cell tandem) output respectively; The both positive and negative polarity of every road direct current input branch road output links to each other with the both positive and negative polarity of bus-bar respectively, and the output of this header box links to each other with the input of the inverter of back level.
Connect with multi-channel DC input branch road respectively in said a plurality of voltage compensations unit, the quantity of promptly said voltage compensation unit is identical with the quantity of direct current input branch road, and all corresponding one road direct current input in each voltage compensation unit branch road.Wherein, each voltage compensation unit is all between the output and said bus-bar of its corresponding direct current input branch road.
The input of said relatively computing unit links to each other with the output of each road direct current input branch road respectively, and the said relatively output of computing unit links to each other with said a plurality of voltage compensations unit respectively.
Said relatively computing unit is used for each road direct current input branch road maximum power point place voltage is compared; Obtain maximum voltage value (being the maximum of voltage) wherein; Calculate maximum power point place magnitude of voltage poor of said maximum and each road direct current input branch road then respectively, and export said difference to each corresponding place, voltage compensation unit of direct current input branch road, road respectively;
Said voltage compensation unit is used for according to said difference its corresponding direct current input branch road being carried out voltage compensation, makes the output voltage values of this road direct current input branch road equal said maximum.
As shown in Figure 2, said relatively computing unit comprises comparison module and computing module; Said each voltage compensation unit includes inversion module, step-down module, rectification module, voltage regulating module and control module.
Wherein, The input of said comparison module links to each other with the output of said multi-channel DC input branch road; Be used for the maximum power point place voltage that said multi-channel DC input branch road carries out respectively obtaining behind the maximal power tracing is compared and analyzes; The maximum that draws voltage wherein is as the conflux d-c bus voltage value of output of this header box, and the maximum power point place magnitude of voltage that said d-c bus voltage value and each road direct current are imported branch road exports computing unit in real time to;
The output of said computing module links to each other with said a plurality of voltage compensations unit; Be used to calculate maximum power point place magnitude of voltage poor of said d-c bus voltage value and each road direct current input branch road, and export said difference to each corresponding place, voltage compensation unit of direct current input branch road, road respectively.
The output of the computing module in the input of the control module in the said voltage compensation unit and the computing unit relatively links to each other, is used for exporting the magnitude of voltage that equates with said difference according to the corresponding difference control voltage regulating module in this voltage compensation unit.
The output of the direct current input branch road that the input of the inversion module in the said voltage compensation unit is corresponding with it links to each other, and the dc inverter that is used for this branch road of input is an alternating current; The input of said step-down module links to each other with the output of inversion module, is used for said alternating current is carried out step-down; The input of said rectification module links to each other with the output of step-down module, is used for the AC rectification after the said step-down is become unidirectional pulsating nature direct current; The input of said voltage regulating module links to each other with the output of rectification module, is used for said unidirectional pulsating nature direct current is carried out pressure regulation as power supply and according to the control signal of control module output.
As shown in Figure 3, in the present embodiment, said inversion module adopts inverter circuit; Said rectification module adopts rectification circuit; Said step-down module adopts isolating transformer; Said voltage regulating module comprises the first switching tube VT1, second switch pipe VT2, inductance L and capacitor C; The drain electrode of the said first switching tube VT1 links to each other with the electrode input end of this voltage regulating module; The source electrode of the first switching tube VT1 links to each other with the drain electrode of second switch pipe VT2; The drain electrode of second switch pipe VT2 links to each other with the negative input of this voltage regulating module, and the input of said inductance L links to each other with the series connection node of second switch pipe VT2 with the first switching tube VT1, and the output of inductance L links to each other with the negative pole of capacitor C; The positive pole of capacitor C links to each other with the drain electrode of the first switching tube VT1, and the output positive and negative charge of this voltage regulating module links to each other with the both positive and negative polarity of capacitor C respectively.Said control module is regulated the magnitude of voltage that said voltage regulating module is exported through the duty cycle of switching of controlling the first switching tube VT1 and second switch pipe VT2, and this magnitude of voltage is equated with said difference (being the difference of the maximum power point place magnitude of voltage of the said d-c bus voltage value direct current input branch road corresponding with it).
Of Fig. 4, in the present embodiment, said photovoltaic array header box also can comprise a plurality of first circuit protection units and a second circuit protected location.
Said a plurality of first protected location is connected on the output of each road direct current input branch road respectively and imports between the corresponding voltage compensation unit of branch road with each road direct current; Be used for this header box is carried out overcurrent protection; When preventing that each road direct current input branch road is short-circuited, header box and grid-connected photovoltaic system are caused damage.Preferred said first circuit protection unit adopts fuse.
Said second circuit protected location links to each other with the output positive and negative charge of said bus-bar, promptly links to each other with the output of said header box, is used for this header box is transshipped and short-circuit protection.Preferred said second circuit protected location adopts dc circuit breaker.
The operation principle of photovoltaic array header box according to the invention is:
Said header box all has on the basis of maximal power tracing function at its each direct current input branch road; Earlier each road direct current input branch road is compared and analyzes through resulting maximum power point place magnitude of voltage behind the maximal power tracing; Obtain the maximum of voltage wherein; And with the maximum of this voltage as the conflux d-c bus voltage value of output of this header box; Import maximum power point place magnitude of voltage poor of branch road according to calculating said d-c bus voltage value and each road direct current then; Compensate through the input voltage of the corresponding voltage compensation unit of each direct current input branch road each branch road; Make the output voltage of each road direct current input branch road be equal to said DC bus-bar voltage; And the input voltage of each road direct current input branch road (output voltage of the photovoltaic array/solar cell tandem that promptly links to each other with this road direct current input branch road) still is maximum power point place voltage; Be that each road direct current input branch road is still exported with its maximum power after confluxing through said header box, and the DC bus-bar voltage maximum power point place voltage change of each road direct current input branch road originally of output that can not cause because of the maximum power point place voltage difference of each road direct current input branch road confluxing, thereby can make the gross output of this header box reach maximum.
As shown in Figure 5, the control flow of said photovoltaic array header box comprises the steps:
S101. the voltage Vmax of maximum power point place of each road of comparison and analysis direct current input branch road draws maximum wherein as the conflux d-c bus voltage value V of output of this header box.
S102. calculate the difference DELTA V of the magnitude of voltage Vmax of maximum power point place of said d-c bus voltage value V and each road direct current input branch road.
S103. according to said difference DELTA V, calculate the conducting duty ratio D1 of the first switching tube VT1 in the voltage regulating module of each voltage compensation unit and the conducting duty ratio D2 of second switch pipe VT2.
S104. according to the conducting duty ratio D1 of the first switching tube VT1 in the voltage regulating module of each voltage compensation unit and the conducting duty ratio D2 of second switch pipe VT2; Respectively the conduction and cut-off time of first switching tube VT1 in each voltage regulating module and second switch pipe VT2 is controlled; Make each voltage regulating module output voltage be equal to its corresponding difference DELTA V, even also the voltage of each voltage compensation unit output is equal to its corresponding difference DELTA V.
Repeated execution of steps s101~s104 is equal to said DC bus-bar voltage until the output voltage of each road direct current input branch road, thereby guarantees that each road direct current input branch road exports with maximum power all the time.
Embodiment 2:
The difference of present embodiment and embodiment 1 is:
In the present embodiment, said voltage compensation unit does not comprise inversion module, step-down module and rectification module, and promptly said voltage compensation unit includes only control module and voltage regulating module.
Other structures in the present embodiment and effect are all identical with embodiment 1, repeat no more here.
It is understandable that above execution mode only is the illustrative embodiments that adopts for principle of the present invention is described, yet the present invention is not limited thereto.For the one of ordinary skilled in the art, under the situation that does not break away from spirit of the present invention and essence, can make various modification and improvement, these modification also are regarded as protection scope of the present invention with improving.

Claims (10)

1. a photovoltaic array header box comprises multi-channel DC input branch road, confluxes into the output of one road direct current after the parallel connection of said multi-channel DC input branch road; Every road direct current input branch road all possesses the maximal power tracing function; Make every road direct current input branch road all be operated in maximum power point place separately, it is characterized in that said header box also comprises a plurality of voltage compensations unit of connecting with said multi-channel DC input branch road respectively; And comparison computing unit
Said relatively computing unit is used for relatively drawing the maximum of each road direct current input branch road maximum power point place voltage; Calculate maximum power point place magnitude of voltage poor of maximum and each road direct current input branch road of said voltage then respectively, and export said difference to each corresponding place, voltage compensation unit of direct current input branch road, road respectively;
The quantity of said voltage compensation unit equates with the quantity of said direct current input branch road, is used for according to said difference its corresponding direct current input branch road being carried out voltage compensation, and the output voltage values that makes this road direct current import branch road equals the maximum of said voltage.
2. photovoltaic array header box according to claim 1 is characterized in that, said relatively computing unit comprises comparison module and computing module,
The input of said comparison module links to each other with the output of said multi-channel DC input branch road; Be used for the maximum power point place voltage that said multi-channel DC input branch road carries out respectively obtaining behind the maximal power tracing is compared and analyzes; Draw maximum wherein as the conflux d-c bus voltage value of output of this header box, and the maximum power point place magnitude of voltage that said d-c bus voltage value and each road direct current are imported branch road exports computing module in real time to;
The output of said computing module links to each other with said a plurality of voltage compensations unit; Be used to calculate maximum power point place magnitude of voltage poor of said d-c bus voltage value and each road direct current input branch road, and export said difference to each corresponding place, voltage compensation unit of direct current input branch road, road respectively.
3. photovoltaic array header box according to claim 2 is characterized in that, said each voltage compensation unit includes voltage regulating module and control module,
Said control module links to each other with computing module in the computing unit relatively, is used for exporting the magnitude of voltage that equates with said difference according to the corresponding difference control voltage regulating module in this voltage compensation unit.
4. photovoltaic array header box according to claim 3 is characterized in that, said voltage regulating module comprises first switching tube, second switch pipe, inductance and electric capacity,
The drain electrode of said first switching tube links to each other with the electrode input end of this voltage regulating module; The source electrode of first switching tube links to each other with the drain electrode of second switch pipe; The drain electrode of second switch pipe links to each other with the negative input of this voltage regulating module, and the input of said inductance links to each other with the series connection node of first switching tube and second switch pipe, and the output of inductance links to each other with the negative pole of electric capacity; The positive pole of electric capacity links to each other with the drain electrode of first switching tube, and the output positive and negative charge of this voltage regulating module links to each other with the both positive and negative polarity of electric capacity respectively;
Said control module is regulated the magnitude of voltage that said voltage regulating module is exported through the duty cycle of switching of controlling first switching tube and second switch pipe, and this magnitude of voltage is equated with said difference.
5. photovoltaic array header box according to claim 3 is characterized in that, said voltage compensation unit also comprises inversion module, step-down module and rectification module,
The output of the direct current input branch road that the input of said inversion module is corresponding with this voltage compensation unit links to each other, and the dc inverter that is used for this branch road of input is an alternating current;
The input of said step-down module links to each other with the output of inversion module, is used for said alternating current is carried out step-down;
The input of said rectification module links to each other with the output of step-down module, is used for the AC rectification after the said step-down is become unidirectional pulsating nature direct current;
The input of said voltage regulating module links to each other with the output of rectification module, is used for said unidirectional pulsating nature direct current is carried out pressure regulation as power supply and according to the control signal of control module output.
6. photovoltaic array header box according to claim 5 is characterized in that, said inversion module adopts inverter circuit; Said rectification module adopts rectification circuit; Said step-down module adopts isolating transformer.
7. according to the described photovoltaic array header box of one of claim 1-6; It is characterized in that; Said header box also comprises a plurality of first circuit protection units; Its output that is connected on each road direct current input branch road is respectively imported between the corresponding voltage compensation unit of branch road with each road direct current, is used for this header box is carried out overcurrent protection.
8. photovoltaic array header box according to claim 7 is characterized in that, said first circuit protection unit adopts fuse.
9. according to the described photovoltaic array header box of one of claim 1-6, it is characterized in that said header box also comprises the second circuit protected location, it links to each other with the output of said header box, is used for this header box is transshipped and short-circuit protection.
10. photovoltaic array header box according to claim 9 is characterized in that, said second circuit protected location adopts dc circuit breaker.
CN201210066897.9A 2012-03-13 2012-03-13 A kind of photovoltaic array conflux box Expired - Fee Related CN102611355B (en)

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CN103872675A (en) * 2012-12-11 2014-06-18 周锡卫 Structure and method of real-time regulation and control converging device based on rear deployment
CN104143835A (en) * 2014-07-30 2014-11-12 深圳科士达科技股份有限公司 Photovoltaic power generation system
CN104158482A (en) * 2014-07-30 2014-11-19 深圳科士达科技股份有限公司 Efficient photovoltaic power generation system
CN104156028A (en) * 2014-07-30 2014-11-19 深圳科士达科技股份有限公司 MPPT (maximum power point tracking) compensator of photovoltaic power generation system
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