CN105141242A - Photovoltaic power generation device and working method thereof - Google Patents
Photovoltaic power generation device and working method thereof Download PDFInfo
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- CN105141242A CN105141242A CN201510603572.3A CN201510603572A CN105141242A CN 105141242 A CN105141242 A CN 105141242A CN 201510603572 A CN201510603572 A CN 201510603572A CN 105141242 A CN105141242 A CN 105141242A
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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
- Y02E10/52—PV systems with concentrators
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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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- 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
- Y02E70/00—Other energy conversion or management systems reducing GHG emissions
- Y02E70/30—Systems combining energy storage with energy generation of non-fossil origin
Abstract
The present invention relates to a photovoltaic power generation device which is suitable for tracking the sunlight and a working method thereof. The photovoltaic power generation device comprises a solar panel which is a square array composed of at least four power generation wafers; an optical assembly which has a flat plate shape, is arranged in right front of a light acceptation surface of the solar panel, is parallel with the solar panel, and is used to converge the sunlight and generate a square light spot on the light acceptation surface when the sunlight is vertical with the light acceptation surface, wherein the shape and area of the light spot are consistent with the shape and area of the light acceptation surface; a power detection unit used for detecting the output powers of the power generation wafers; a driving mechanism used for controlling the solar panel to rotate angles along with the sun; a processor unit connected with the power detection unit and the driving mechanism and used for generating the corresponding angle control signals according to the received output power values of the power generation wafers, controlling the driving mechanism to drive the solar panel to rotate the corresponding angles, thereby enabling the sunlight is vertical with the light acceptation surface.
Description
The application is divisional application, and the application number of original application is 201310197011.9, and the applying date is: 2013.05.23, invention and created name: a kind of be suitable for following spot photovoltaic power generation apparatus and method of work.
Technical field
The present invention relates to a kind of photovoltaic power generation apparatus and method of work thereof, particularly relate to a kind of be suitable for following spot photovoltaic power generation apparatus and method of work.
Background technology
At photovoltaic art, in order to improve solar energy utilization ratio, the technology of following spot is a technical problem of can not ignore, and shows according to theory analysis, to tracking and the non-tracking of the sun, and the acceptance rate difference 30% to 40% of energy.
In the prior art, the technology of following spot adopted passes through sensor devices, such as: light sensor, photo resistance, described sensor devices matches with its shade, make sensor devices light uneven and produce different size voltage export, single-chip microcomputer adjusts corresponding angle according to the driving mechanisms control solar panels of corresponding voltage control X or Y-axis.As can be seen here, in the scheme of prior art, sensor devices must coordinate with shade and could work, but producing shade must rely on cross to realize every tabula rasa or sensor devices is positioned in cross recess, therefore this mode brings some inconvenience to installation.
Patent application: the sun tracking system of solar wafer self-inductance measurement, application number: 201210206407.0, although this technical scheme does not adopt sensor devices, the voltage signal that its principle or shade make four wafers that generate electricity produce is different; This technical scheme utilizes cross also to there is same technical problem every tabula rasa.
Summary of the invention
The technical problem to be solved in the present invention is to provide a kind of photovoltaic power generation apparatus being suitable for following spot, and this photovoltaic power generation apparatus, without the need to by realizing shade every tabula rasa to produce different voltage, has the advantage that structure is simple, easy for installation.
In order to solve the problems of the technologies described above, the invention provides a kind of photovoltaic power generation apparatus being suitable for following spot, comprising: solar panels, at least form a square array by four pieces of generating wafers; Optical module, and in tabular, be located at the dead ahead of the sensitive surface of solar panels and parallel with solar panels, when sunlight is perpendicular to described sensitive surface, optical module is for converging sunlight and produce a square focus spot on described sensitive surface, and the shape of the shape of this hot spot, area and described sensitive surface, area are consistent; Power detecting unit, for detecting the power output of each generating wafer; Driving mechanism, for controlling described solar panels with sun rotational angle; Processor unit, be connected with described power detecting unit, driving mechanism, for the output power value according to each generating wafer received, produce respective angles control signal, controlling described driving mechanism drives described solar panels to rotate respective angles, to make sunlight perpendicular to described sensitive surface.
Further, described optical module comprises: in foursquare plate glass, be located at this plate glass surrounding and with its shape, eight pieces of dioptric lenses that area is identical, four limits that four pieces of dioptric lenses are wherein in close proximity to described plate glass are arranged, another four pieces of dioptric lenses are distributed in described plate glass end angular direction, are formed a square to make eight pieces of dioptric lenses and plate glass entirety; Described solar panels are just to this plate glass; The beam projecting face of described dioptric lens is evenly distributed with some refractive power bars, and after described refractive power bar is suitable for making sunlight vertically inject described dioptric lens, all refract on the sensitive surface of described solar panels, and be uniformly distributed on the position of described square focus spot.
Further, lens jacket is coated with completely respectively above the plane of incidence of described each dioptric lens, the edge of described dioptric lens is respectively equipped with strutting piece, this strutting piece is used for by flexible, to change the angle that sunlight injects described lens jacket, adjustment sunlight enters the incidence angle of the plane of incidence of described dioptric lens, is uniformly distributed on the position of described square focus spot to make sunlight.
Further, described strutting piece is hydraulic strut or pressure spacer bar, and described hydraulic strut or pressure spacer bar are connected with a hydraulic pressure or actuating device of atmospheric pressure, and described hydraulic pressure or actuating device of atmospheric pressure are controlled by described processor unit.
Further, described photovoltaic power generation apparatus also comprises: the current control module of the output current for stablizing this generating wafer be connected with the output of described generating wafer, and the output of this current control module is connected with storage battery, described current control module comprises: switching mode integrated voltage-stabilized chip, input, the earth terminal of this switching mode integrated voltage-stabilized chip are connected with the positive and negative output of described generating wafer respectively, the output of this switching mode integrated voltage-stabilized chip, earth terminal are connected with the negative electrode of a voltage-stabiliser tube, anode respectively, the output of this switching mode integrated voltage-stabilized chip is also connected with one end of an inductance, the other end of this inductance is connected with the anode of described storage battery, and the earth terminal of described switching mode integrated voltage-stabilized chip is connected with the negative terminal of storage battery with after the first resistant series, the feedback end of described switching mode integrated voltage-stabilized chip is connected with one end of the second resistance, the 3rd resistance, the first electric capacity respectively, the other end of described 3rd resistance, the first electric capacity is connected with the anode of described storage battery, and described second resistance is connected with the negative output terminal of described generating wafer after connecting with a potentiometer, the switch terminals of described switching mode integrated voltage-stabilized chip is respectively with the 4th, one end of 5th resistance is connected, the other end of the 5th resistance is connected with the earth terminal of described switching mode integrated voltage-stabilized chip, the other end of described 4th resistance is connected with the collector electrode of a PNP triode, the emitter of this PNP triode, base stage is connected with the two ends of the 6th resistance respectively, and this emitter is connected with the positive output end of generating wafer, described base stage is connected with the collector electrode of a NPN triode, the emitter of this NPN triode is connected with the earth terminal of described switching mode integrated voltage-stabilized chip, the base stage of this NPN triode is connected with the negative terminal of described storage battery.
Further, described photovoltaic power generation apparatus also comprises: the Sine Wave Pulse Width Modulation unit be connected with storage battery.
The method of work of a kind of photovoltaic power generation apparatus on the above-mentioned basis being suitable for the photovoltaic power generation apparatus of following spot, described photovoltaic power generation apparatus comprises: storage battery, the Sine Wave Pulse Width Modulation unit be connected with storage battery;
The method of work of described photovoltaic power generation apparatus comprises: if when sunlight out of plumb injects the sensitive surface of described solar panels, the square focus spot generation respective offsets that described optical module produces, then the power output on the generating wafer do not covered completely by this square focus spot is lower than the power output on the generating wafer covered completely by hot spot; Described processor unit is by detecting the corresponding power output of each generating wafer, calculate described solar panels to need to rotate after respective angles, controlling driving mechanism drives described solar panels to rotate respective angles, until the power output on each generating wafer is identical, namely sunlight vertically injects described sensitive surface.
Compared with prior art, tool of the present invention has the following advantages: (1) can realize the convergence of sunlight by described optical module, and the sensitive surface energy of described solar panels is strengthened, to obtain more electric energy; (2) realizing solar tracking without the need to adopting cross to coordinate every tabula rasa and photosensitive components, overcoming the technical problem of installing the installation inconvenience that cross brings every tabula rasa; (3) described optical module can produce 9 times of spotlight effects, effectively raises solar energy utilization ratio, reduces the cost of solar panels; (4) change by described lens jacket the angle that sunlight injects described lens jacket, adjustment sunlight enters the incidence angle of the plane of incidence of described dioptric lens, to make sunlight be uniformly distributed on the position of described square focus spot, overcome the convergence deviation that the refractive power bar on optical module may cause; (5) described current control module can stability contorting generating wafer produce electric current, avoid the life-span of current fluctuation to storage battery to impact.
Accompanying drawing explanation
In order to make content of the present invention be more likely to be clearly understood, below basis specific embodiment and by reference to the accompanying drawings, the present invention is further detailed explanation, wherein
The structural representation of Fig. 1 photovoltaic power generation apparatus of the present invention;
The optical module of Fig. 2 photovoltaic power generation apparatus of the present invention and solar panels sensitive surface refractive power schematic diagram one;
The optical module of Fig. 3 photovoltaic power generation apparatus of the present invention and solar panels sensitive surface refractive power schematic diagram two;
The structural representation of the optical module of Fig. 4 photovoltaic power generation apparatus of the present invention;
The structural representation of Fig. 5 dioptric lens of the present invention;
The structural representation of Fig. 6 dioptric lens of the present invention and lens jacket;
The electrical block diagram of Fig. 7 photovoltaic power generation apparatus of the present invention;
The circuit diagram of Fig. 8 current control module of the present invention;
The circuit structure diagram of Fig. 9 Sine Wave Pulse Width Modulation unit of the present invention;
Figure 10 voltage space-vector decomposition figure of the present invention.
Wherein, 1 solar panels, 1-1 sensitive surface, 2 plate glass, 3 dioptric lenses, 3-1 refractive power bar, 4 square focus spots, 5 lens jackets, 6 strutting pieces.
Embodiment
Below in conjunction with drawings and Examples, the present invention is described in detail:
Embodiment 1
See Fig. 1, Fig. 2, Fig. 3, Fig. 7, a kind of photovoltaic power generation apparatus being suitable for following spot, comprising: solar panels 1, at least forms a square array by four pieces of generating wafers; Optical module, and in tabular, be located at the dead ahead of the sensitive surface 1-1 of solar panels 1 and parallel with solar panels 1, and the plane of incidence of described optical module is coaxial with the sensitive surface 1-1 of described solar panels 1, when sunlight is perpendicular to described sensitive surface 1-1, optical module is for converging sunlight and produce a square focus spot 4 on described sensitive surface 1-1, and the shape of the shape of this hot spot, area and described sensitive surface 1-1, area are consistent; Power detecting unit, for detecting the power output of each generating wafer; Driving mechanism, for controlling described solar panels 1 with sun rotational angle; Processor unit, be connected with described power detecting unit, driving mechanism, for the output power value according to each generating wafer received, produce respective angles control signal, controlling described driving mechanism drives described solar panels 1 to rotate respective angles, to make sunlight perpendicular to described sensitive surface 1-1.
Wherein, described driving mechanism comprises two and controls the drive motors that X made by described solar panels, Y-axis is rotated respectively, and namely a drive motors controls described solar panels and horizontally rotates, and a drive motors controls described solar panels and spins upside down.This drive motors can adopt stepping motor, or DC micromotor; Also degree of freedom MG995 steering wheel The Cloud Terrace joint can be adopted to realize.
Described processor unit can adopt c51 series monolithic or ARM chip, according to the driving force to motor, can add motor drive module.
See Fig. 3, Fig. 4, Fig. 5, described optical module comprises: in foursquare plate glass 2, be located at this plate glass 2 surrounding and with its shape, eight pieces of dioptric lenses 3 that area is identical, four limits that four pieces of dioptric lenses 3 are wherein in close proximity to described plate glass 2 are arranged, another four pieces of dioptric lenses 3 are distributed in described plate glass 2 end angular direction, are formed a square to make eight pieces of dioptric lenses 3 with plate glass 2 entirety; Described solar panels 1 are just to this plate glass 2; The beam projecting face of described dioptric lens 3 is evenly distributed with some refractive power bar 3-1, and after described refractive power bar 3-1 is suitable for making sunlight vertically inject described dioptric lens 3, all refract on the sensitive surface 1-1 of described solar panels 1, and be uniformly distributed on the position of described square focus spot 4.
Because the sensitive surface 1-1 structure of described solar panels 1 may have rectangle, then the convergence hot spot that described optical module produces also is the rectangle identical with described sensitive surface 1-1.Namely plate glass 2, dioptric lens 3 are also the rectangles identical with described sensitive surface 1-1.
Fig. 6, lens jacket 5 is coated with completely respectively above the plane of incidence of described each dioptric lens 3, the edge of described dioptric lens 3 is respectively equipped with strutting piece 6, this strutting piece 6 is flexible for passing through, to change the angle that sunlight injects described lens jacket 5, adjustment sunlight enters the incidence angle of the plane of incidence of described dioptric lens 3, is uniformly distributed on the position of described square focus spot 4 to make sunlight.
Described strutting piece 6 can adopt micro hydraulic strut, or micro pressure strut, this micro hydraulic strut, or micro pressure strut can adopt Non-follow control, can also be connected with micro hydraulic or actuating device of atmospheric pressure, this micro hydraulic or actuating device of atmospheric pressure are controlled by described processor unit.
When starting working, first artificial described solar panels 1 just to the sun, namely optical module allows sunlight vertically inject as far as possible, described square focus spot 4 is corrected, namely the sunlight that described optical module produces reflects the position of all distribution and this square focus spot 4, if find that there is hot spot not converge, produce respective offsets, generating wafer then on relevant position is not covered by hot spot completely, then its power generating wafer that can be capped completely lower than other obtained, the angle of the lens jacket 5 above the dioptric lens 3 of hot spot deviation is there is in described processor unit according to the performance number adjustment received, further, adjustment sunlight enters the incidence angle of the plane of incidence of this dioptric lens 3, sunlight is uniformly distributed on the position of described square focus spot 4.
Described photovoltaic power generation apparatus also comprises: the current control module of the output current for stablizing this generating wafer be connected with the output of described generating wafer, and the output of this current control module is connected with storage battery, described current control module comprises: switching mode integrated voltage-stabilized chip, input, the earth terminal of this switching mode integrated voltage-stabilized chip are connected with the positive and negative output of described generating wafer respectively, the output of this switching mode integrated voltage-stabilized chip, earth terminal are connected with the negative electrode of a voltage-stabiliser tube D1, anode respectively, the output of this switching mode integrated voltage-stabilized chip is also connected with one end of an inductance L 1, the other end of this inductance L 1 is connected with the anode of described storage battery, and the earth terminal of described switching mode integrated voltage-stabilized chip is connected with the negative terminal of storage battery after connecting with the first resistance R1, the feedback end of described switching mode integrated voltage-stabilized chip is connected with one end of the second resistance R2, the 3rd resistance R3, the first electric capacity C1 respectively, the other end of described 3rd resistance R3, the first electric capacity C1 is connected with the anode of described storage battery, is connected after described second resistance R2 connects with a potentiometer VR1 with the negative output terminal of described generating wafer, the switch terminals of described switching mode integrated voltage-stabilized chip respectively with the 4th resistance R4, one end of 5th resistance R5 is connected, the other end of the 5th resistance R5 is connected with the earth terminal of described switching mode integrated voltage-stabilized chip, the other end of described 4th resistance R4 is connected with the collector electrode of a PNP triode Q1, the emitter of this PNP triode Q1, base stage is connected with the two ends of the 6th resistance R6 respectively, and this emitter is connected with the positive output end of generating wafer, described base stage is connected with the collector electrode of a NPN triode Q2, the emitter of this NPN triode Q2 is connected with the earth terminal of described switching mode integrated voltage-stabilized chip, the base stage of this NPN triode Q2 is connected with the negative terminal of described storage battery.
Described switching mode integrated voltage-stabilized chip adopts LM2596.
Described inductance L 1 adopts the electric capacity of 47 μ H, and in figure, SUNBATT+, SUNBATT-connect the positive and negative electrode of described generating wafer respectively, and BATT+, BATT-connect the positive and negative electrode of storage battery respectively.
The current stabilization that described current control module produces, effectively extends the life-span of storage battery.
See Fig. 7, described photovoltaic power generation apparatus also comprises: the Sine Wave Pulse Width Modulation unit be connected with storage battery.
See Fig. 9, described Sine Wave Pulse Width Modulation unit comprises: three-phase inverter, this three-phase inverter is controlled by a DSP module, the DC side of this three-phase inverter, AC are respectively equipped with direct current, alternating voltage current detection circuit, and described direct current, alternating voltage current detection circuit are connected with described DSP module.
Embodiment 2
See Fig. 1, Fig. 2, Fig. 3, Fig. 4, Fig. 5, Fig. 6, Fig. 7, the method for work of a kind of photovoltaic power generation apparatus on embodiment 1 basis, described photovoltaic power generation apparatus comprises: storage battery, the Sine Wave Pulse Width Modulation unit be connected with storage battery;
The method of work of described photovoltaic power generation apparatus comprises: if when sunlight out of plumb injects the sensitive surface 1-1 of described solar panels 1, there is respective offsets in the square focus spot 4 that described optical module produces, then the power output on the generating wafer do not covered completely by this square focus spot 4 is lower than the power output on the generating wafer covered completely by hot spot; Described processor unit is by detecting the corresponding power output of each generating wafer, after calculating the respective angles of described solar panels 1 needs rotation, controlling driving mechanism drives described solar panels 1 to rotate respective angles, until the power output on each generating wafer is identical, namely sunlight vertically injects described sensitive surface 1-1.
Embodiment 3
See Fig. 9, the method of work of the described Sine Wave Pulse Width Modulation unit on embodiment 1 or 2 basis, described Sine Wave Pulse Width Modulation unit comprises: three-phase inverter, this three-phase inverter is controlled by a DSP module, the DC side of this three-phase inverter, AC are respectively equipped with direct current, alternating voltage current detection circuit, and described direct current, alternating voltage current detection circuit are connected with described DSP module.
Three-phase voltage can be met by described Sine Wave Pulse Width Modulation to export.
See Figure 10, the method that this DSP module produces Sine Wave Pulse Width Modulation signal comprises: set up a three-phase static coordinate system according to its axis, from
direction respectively is I, II, III, IV, V, VI sector counterclockwise;
Required reference voltage vector
relevant voltage vector T action time in each sector
1, T
2:
Wherein, N=3, N=1, N=5, N=4, N=6, N=2 corresponding I, II, III, IV, V, VI sector respectively; T
sbe a sampling period, be the sampling period that described DSP gathers direct current, AC signal, V
a, V
bfor required reference voltage vector
in three-phase static coordinate system
projection on direction, V
dcfor DC bus-bar voltage.
T
1, T
2after assignment, also to judge it, work as T
1+ T
2>T
s, then T is got
1=T
1ts/ (T
1+ T
2), T
2=T
2ts/ (T
1+ T
2).
Finally, realized by dsp program.Wherein, as required, can select the sinusoidal wave pulse width of five sections or seven segmentations, DSP module can adopt the dsp chip of MC56F8346 or other models all can realize this modulation.
The method that described DSP module produces Sine Wave Pulse Width Modulation signal also comprises:
Judge required reference voltage vector
in the step of respective sectors, this step comprises:
If sector discriminant: N=A+2B+4C;
Wherein, V
a+ 2V
b> 0 A=1, otherwise A=0;
V
a-V
b> 0, then B=1, otherwise B=0;
2V
a+ V
b< 0, then C=1, otherwise C=0;
Judge according to above-mentioned formula the value determining corresponding A, B, C, substitute into described sector discriminant to obtain required reference voltage vector
sector, place, that is, N=3, N=1, N=5, N=4, N=6, N=2 corresponding I, II, III, IV, V, VI sector respectively.
Wherein, three-phase inverter, two power tube synchronizations of its every phase brachium pontis only have a conducting, and have 8 kinds of on off states to exist like this, its fundamental space vector comprises
the amplitude of six non-zero is
(V
dcfor DC bus-bar voltage).By controlling fundamental space vectorial combination and action time, Sine Wave Pulse Width Modulation is according to reference voltage vector
carry out rotating operation.V
1, V
2, V
3, V4, V
5, V
6represent vector respectively
mould, namely have: V
1=V
2=V
3=V
4=V
5=V
6=(2/3) V
dc.
In the modulator approach of Sine Wave Pulse Width Modulation signal, three-phase system model needs to be transformed in two-phase rest frame:
In formula, V
a, V
b, V
cfor space voltage vector
in three-phase static coordinate system
projection on direction, V
alf, V
betfor reference voltage vector
at two phase coordinate systems
projection on direction, V
sfor
mould, then have:
V
alf=V
s* cos θ (formula 2)
V
bet=V
s* sin θ (formula 3)
Reference voltage vector
adjacent fundamental space Vector modulation can be crossed obtain:
In above formula, T
k, T
k+1for fundamental space vector
at a sampling period T
sin action time.K is vector place sector number, and azimuth θ can be obtained by antitrigonometric function computing in two-phase rest frame.
Judge reference voltage vector
sector, place, analyzes V
alf, V
betrelation, following rule can be obtained, namely judge inequality:
If V
bet> 0, then A=1, otherwise A=0;
If
then B=1, otherwise B=0;
If
then C=1, otherwise C=0;
N=A+2B+4C is differentiated by sector.
Easily know N=3, N=1, N=5, N=4, N=6, N=2 be corresponding I, II, III, IV, V, VI sector respectively.
Work as reference voltage vector
when the Ith sector, fundamental space vector can calculate by through type action time:
Can obtaining of solution:
Work as reference voltage vector
when the IIth sector,
In like manner can deriving the voltage vector action time in other sector, all there is computing as above when needing the vector of synthesis to be positioned at each different sector.By being not difficult to find that they are combinations of some basic times to solving of each sector basic vector operate time.See Figure 10, required reference voltage vector
projection in three-phase static coordinate system is respectively V
a, V
b, V
c, then have
Obtained by formula (1) and formula (7)
Obtain V
alfand V
betwith V
a, V
bcorresponding relation namely
V
alf＝1*V
a+0*V
b＝V
a
Judge required reference voltage vector
sector, place, analyzes V
alf, V
betrelation, by V
alf, V
betuse V respectively
a, V
bjudge reference voltage vector
sector, place, substitutes into above-mentioned judgement inequality by formula (9), obtains following rule:
If V
a+ 2V
b> 0 A=1, otherwise A=0;
V
a-V
b> 0, then B=1, otherwise B=0;
2V
a+ V
b< 0, then C=1, otherwise C=0;
According to the value calculating A, B, C, bring N=A+2B+4C into, to determine required reference voltage vector
sector, place, that is, N=3, N=1, N=5, N=4, N=6, N=2 corresponding I, II, III, IV, V, VI sector respectively.
When required reference voltage vector
when the Ith sector, fundamental space vector can pass through formula (5) and calculate action time, namely formula (9) is substituted into respectively,
When required reference voltage vector
when the IIth sector, formula (9) is substituted into formula (6) respectively,
In like manner can derive the voltage vector action time in other sector, here not in repetition, conclude action time as shown above.
As can be seen here, in the method for whole Sine Wave Pulse Width Modulation signal, without the need to using V
c, only need V
a, V
bcan modulation operation be met, optimize computing greatly, improve operation efficiency.
Obviously, above-described embodiment is only for example of the present invention is clearly described, and is not the restriction to embodiments of the present invention.For those of ordinary skill in the field, can also make other changes in different forms on the basis of the above description.Here exhaustive without the need to also giving all execution modes.And these belong to spirit institute's apparent change of extending out of the present invention or change and are still among protection scope of the present invention.
Claims (2)
1. be suitable for a photovoltaic power generation apparatus of following spot, it is characterized in that comprising:
Solar panels, at least form a square array by four pieces of generating wafers;
Optical module, and in tabular, be located at the dead ahead of the sensitive surface of solar panels and parallel with solar panels, when sunlight is perpendicular to described sensitive surface, optical module is for converging sunlight and produce a square focus spot on described sensitive surface, and the shape of the shape of this hot spot, area and described sensitive surface, area are consistent;
Power detecting unit, for detecting the power output of each generating wafer;
Driving mechanism, for controlling described solar panels with sun rotational angle; Driving mechanism comprises two and controls the drive motors that X made by described solar panels, Y-axis is rotated respectively;
Processor unit, be connected with described power detecting unit, driving mechanism, for the output power value according to each generating wafer received, produce respective angles control signal, controlling described driving mechanism drives described solar panels to rotate respective angles, to make sunlight perpendicular to described sensitive surface;
Described optical module comprises: in foursquare plate glass, be located at this plate glass surrounding and with its shape, eight pieces of dioptric lenses that area is identical, four limits that four pieces of dioptric lenses are wherein in close proximity to described plate glass are arranged, another four pieces of dioptric lenses are distributed in described plate glass end angular direction, are formed a square to make eight pieces of dioptric lenses and plate glass entirety; Described solar panels are just to this plate glass;
The beam projecting face of described dioptric lens is evenly distributed with some refractive power bars, and after described refractive power bar is suitable for making sunlight vertically inject described dioptric lens, all refract on the sensitive surface of described solar panels, and be uniformly distributed on the position of described square focus spot;
Lens jacket is coated with completely respectively above the plane of incidence of described each dioptric lens, the edge of described dioptric lens is respectively equipped with strutting piece, this strutting piece is used for by flexible, to change the angle that sunlight injects described lens jacket, adjustment sunlight enters the incidence angle of the plane of incidence of described dioptric lens, is uniformly distributed on the position of described square focus spot to make sunlight.
2. a method of work for photovoltaic power generation apparatus according to claim 1, is characterized in that,
Described photovoltaic power generation apparatus also comprises: storage battery, the Sine Wave Pulse Width Modulation unit be connected with storage battery;
The method of work of described photovoltaic power generation apparatus comprises: if when sunlight out of plumb injects the sensitive surface of described solar panels, the square focus spot generation respective offsets that described optical module produces, then the power output on the generating wafer do not covered completely by this square focus spot is lower than the power output on the generating wafer covered completely by hot spot;
Processor unit in described photovoltaic power generation apparatus is by detecting the corresponding power output of each generating wafer, after calculating the respective angles of described solar panels needs rotation, controlling driving mechanism drives described solar panels to rotate respective angles, until the power output on each generating wafer is identical, namely sunlight vertically injects described sensitive surface.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201310197011.9A Division CN103795335B (en) | 2013-05-23 | 2013-05-23 | A kind of be suitable for following spot photovoltaic power generation apparatus and method of work |
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| CN201510605512.5A Pending CN105207600A (en) | 2013-05-23 | 2013-05-23 | Photovoltaic power generation device |
| CN201510605285.6A Withdrawn CN105227123A (en) | 2013-05-23 | 2013-05-23 | Based on the photovoltaic power generation apparatus of current control module |
| CN201510602881.9A Pending CN105207599A (en) | 2013-05-23 | 2013-05-23 | Photovoltaic power generation device and working method thereof |
| CN201510603572.3A Pending CN105141242A (en) | 2013-05-23 | 2013-05-23 | Photovoltaic power generation device and working method thereof |
| CN201510605438.7A Withdrawn CN105207572A (en) | 2013-05-23 | 2013-05-23 | Photovoltaic power generation device based on current control module and suitable for following spots |
| CN201510605209.5A Withdrawn CN105227122A (en) | 2013-05-23 | 2013-05-23 | Based on current control module, be suitable for the photovoltaic power generation apparatus of following spot |
| CN201510603571.9A Withdrawn CN105207589A (en) | 2013-05-23 | 2013-05-23 | Photovoltaic power generation device based on current control module |
| CN201310197011.9A Active CN103795335B (en) | 2013-05-23 | 2013-05-23 | A kind of be suitable for following spot photovoltaic power generation apparatus and method of work |
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| CN201510605512.5A Pending CN105207600A (en) | 2013-05-23 | 2013-05-23 | Photovoltaic power generation device |
| CN201510605285.6A Withdrawn CN105227123A (en) | 2013-05-23 | 2013-05-23 | Based on the photovoltaic power generation apparatus of current control module |
| CN201510602881.9A Pending CN105207599A (en) | 2013-05-23 | 2013-05-23 | Photovoltaic power generation device and working method thereof |
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| CN201510605438.7A Withdrawn CN105207572A (en) | 2013-05-23 | 2013-05-23 | Photovoltaic power generation device based on current control module and suitable for following spots |
| CN201510605209.5A Withdrawn CN105227122A (en) | 2013-05-23 | 2013-05-23 | Based on current control module, be suitable for the photovoltaic power generation apparatus of following spot |
| CN201510603571.9A Withdrawn CN105207589A (en) | 2013-05-23 | 2013-05-23 | Photovoltaic power generation device based on current control module |
| CN201310197011.9A Active CN103795335B (en) | 2013-05-23 | 2013-05-23 | A kind of be suitable for following spot photovoltaic power generation apparatus and method of work |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110910316A (en) * | 2019-05-14 | 2020-03-24 | 程爱军 | Solar equipment control platform |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105207571A (en) * | 2013-05-23 | 2015-12-30 | 朱海燕 | Photovoltaic power generation device and working method thereof |
| CN105958930B (en) * | 2016-07-15 | 2018-02-27 | 黄山睿基新能源股份有限公司 | A kind of intelligent sun tracker control system and its tracking support |
| CN106026882B (en) * | 2016-07-21 | 2018-02-27 | 黄山睿基新能源股份有限公司 | A kind of group control system of intelligent sun tracker |
| CN107992155B (en) * | 2017-05-27 | 2019-11-19 | 湖北工业大学 | A kind of concentration photovoltaic system and its monitoring and control method based on constant current integrated circuit |
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- 2013-05-23 CN CN201510605285.6A patent/CN105227123A/en not_active Withdrawn
- 2013-05-23 CN CN201510602881.9A patent/CN105207599A/en active Pending
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Also Published As
| Publication number | Publication date |
|---|---|
| CN105207572A (en) | 2015-12-30 |
| CN105227122A (en) | 2016-01-06 |
| CN105207599A (en) | 2015-12-30 |
| CN105207600A (en) | 2015-12-30 |
| CN105207571A (en) | 2015-12-30 |
| CN105227123A (en) | 2016-01-06 |
| CN103795335A (en) | 2014-05-14 |
| CN105207589A (en) | 2015-12-30 |
| CN103795335B (en) | 2015-11-18 |
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