CN103199721B - Control method for enabling solar cell array simulator to be adapted to photovoltaic inverter - Google Patents
Control method for enabling solar cell array simulator to be adapted to photovoltaic inverter Download PDFInfo
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- CN103199721B CN103199721B CN201210012007.6A CN201210012007A CN103199721B CN 103199721 B CN103199721 B CN 103199721B CN 201210012007 A CN201210012007 A CN 201210012007A CN 103199721 B CN103199721 B CN 103199721B
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- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
Provided is a control method for enabling a solar cell array simulator to be adapted to a photovoltaic inverter. According to the solar cell array simulator, a voltage-current characteristic curve is arranged on a voltage-current coordinate system, and the photovoltaic inverter is provided with a plurality of disturbance curves relative to the voltage-current coordinate system. The control method includes the following steps that a convergence parameter value and a current difference value are extracted and multiplied to produce a convergence factor, a working initial point provided with work initial currents is extracted on the intersection point of a first working disturbance curve and the voltage-current characteristic curve, a first modification point is extracted on a second working disturbance curve, a second modification point is extracted on the voltage-current coordinate system, a third modification point is extracted on the second working disturbance curve, at last a fourth modification point is extracted on the voltage-current coordinate system, and whether the fourth modification point falls outside a convergence interval is judged.
Description
Technical field
The present invention relates to the control method that a kind of solar battery array simulator adapts to photovoltaic DC-to-AC converter, in particular to a kind of calculation by convergence factor, and the power vs. voltage curve that solar battery array simulator and photovoltaic DC-to-AC converter are operated reaches the control method of convergence.
Background technology
Solar energy directly can be converted to DC power supply by solar battery array, if need be converted into alternating current in order to generating, must be reached by photovoltaic DC-to-AC converter.But, photovoltaic DC-to-AC converter has different disturbance characteristics, therefore different solar battery arrays need mate with suitable photovoltaic DC-to-AC converter, just can reach maximum power usefulness, thus carry out the output voltage current curve of analog solar array now mainly with DC power supply, and be applied to the maximum power tracing performance simulation of photovoltaic DC-to-AC converter simultaneously.In the process of this simulation calculus, DC power supply generally all adopts CV/CC Mode control mode, and coordinate look-up table to reach control to voltage-current curve, but the photovoltaic DC-to-AC converter due to different disturbance characteristic has different disturbance control modes, as the perturbation scheme of CV/CC/CP/CR Mode etc., below by for the DC power supply of the photovoltaic DC-to-AC converter of CR Mode perturbation scheme and CC Mode control mode.
See also Fig. 1 and Fig. 2, the voltage-current curve that Fig. 1 shows prior art controls schematic diagram, and Fig. 2 shows the power vs. voltage curve convergence schematic diagram of prior art.As shown in the figure, in voltage-current curve graph, the second operating disturbances curve that R1 is the first operating disturbances curve of photovoltaic DC-to-AC converter (not shown), R2 is photovoltaic DC-to-AC converter and A, B, C, D and E point are for by working point variation track during the first operating disturbances curve R1 disturbance to the second operating disturbances curve R2, wherein, the tangent line of maximum power tracing point taken from by the voltage-current characteristic line 10 of solar battery array (not shown), and the slope of the second operating disturbances curve R2 is greater than the slope of the voltage-current characteristic line 10 of solar battery array.
Suppose that A is job initiation point, when photovoltaic DC-to-AC converter is by the first operating disturbances curve R1 disturbance to the second operating disturbances curve R2, because DC power supply (not shown) is constant current mode (CC Mode) control mode, working point can move to the first adjusting point B by job initiation point A, then algorithm convergence is controlled in the voltage-current characteristic line of solar battery array by look-up table, therefore working point can move to the second adjusting point C by the first adjusting point B, same, be constant current mode control mode due to DC power supply, working point can move to the 3rd adjusting point D by the second adjusting point C, finally, algorithm convergence is controlled in the voltage-current characteristic line of solar battery array by look-up table, therefore working point can move to the 4th adjusting point E by the 3rd adjusting point D, and then converge in the interval of the first operating disturbances curve R1 and the second operating disturbances curve R2, make DC power supply can complete solar battery array analog functuion smoothly, and then Convergence Distributed Power-voltage curve 20 is simulated in power vs. voltage coordinate system.
See also Fig. 3 and Fig. 4, the voltage-current curve that Fig. 3 shows prior art controls schematic diagram, and the power vs. voltage curve that Fig. 4 shows prior art disperses schematic diagram.As shown in the figure, in voltage-current curve graph, the second operating disturbances curve that the first operating disturbances curve that R1 is photovoltaic DC-to-AC converter, R2 are photovoltaic DC-to-AC converter, and A, B, C, D and E point is by working point variation track during the first operating disturbances curve R1 disturbance to the second operating disturbances curve R2, wherein, the tangent line of maximum power tracing point taken from by the voltage-current characteristic line 10 of solar battery array, and the slope of the second operating disturbances curve R2 is less than the slope of the voltage-current characteristic line 10 of solar battery array.
Suppose that A is job initiation point, when photovoltaic DC-to-AC converter is by the first operating disturbances curve R1 disturbance to the second operating disturbances curve R2, because DC power supply is constant current mode control mode, working point can move to B point by A point, then algorithm convergence is controlled in the voltage-current characteristic line of solar battery array by look-up table, therefore working point can move to C point by B point, same, because DC power supply is constant current mode control mode, working point can move to D point by C point, but, algorithm convergence is being controlled after the voltage-current characteristic line of solar battery array by look-up table, its working point can move to E point by D point, and then cannot converge in the interval of the first operating disturbances curve R1 and the second operating disturbances curve R2, therefore DC power supply can be made cannot to complete solar battery array simulation and lose efficacy, and then in power vs. voltage coordinate system, simulate diverging power-voltage curve 30.
Comprehensive the above, believe such as to have in the art and usually know that the knowledgeable should be understood that in prior art, in DC power supply analog solar array process, likely because the slope of different voltage-current characteristic lines, and making in the power vs. voltage curve of power vs. voltage coordinate system, simulation there will be the problem of inefficacy.
Summary of the invention
The present invention for solve technical problem and object:
Because in the above prior art, the slope of the possible voltage-current curve different because of solar battery array of ubiquity, and make in the power vs. voltage curve of power vs. voltage coordinate system, simulation there will be the problem of inefficacy.
Edge this, the invention provides a kind of solar battery array simulator and adapt to the control method of photovoltaic DC-to-AC converter, by adding the calculation adjustment of convergence factor, and the power vs. voltage curve allowing solar battery array simulator and photovoltaic DC-to-AC converter operate is restrained.
The technological means that the present invention deals with problems:
The necessary technology means that the problem that the present invention is solution prior art adopts are to provide the control method that a kind of solar battery array simulator adapts to a photovoltaic DC-to-AC converter, this solar battery array simulator has a voltage-current characteristic curve on a voltage-to-current coordinate system, and this photovoltaic DC-to-AC converter has multiple disturbance curve corresponding to this voltage-to-current coordinate system, this control method comprises following steps: first on voltage-to-current coordinate system, one first operating disturbances curve and one second operating disturbances curve is captured in those disturbance curves, and an interval of convergence is defined between the first operating disturbances curve and the second operating disturbances curve, then a job initiation point is captured in the point of intersection of the first operating disturbances curve and voltage-current characteristic curve, and job initiation point has a job initiation electric current.
One first adjusting point is captured afterwards on the second operating disturbances curve, and the first adjusting point has job initiation electric current and one first revises voltage, then on voltage-current characteristic curve, one second adjusting point is captured, and the second adjusting point has the first correction voltage and one first correcting current, one the 3rd adjusting point is captured afterwards on the second operating disturbances curve, and the 3rd adjusting point has the first correcting current and one second revises voltage, then on voltage-current characteristic curve, one the 4th adjusting point is captured, and the 4th adjusting point has the second correction voltage and one second correcting current, judge whether the 4th adjusting point falls within outside the interval of convergence afterwards.
Then when the 4th adjusting point falls within outside the interval of convergence, acquisition one convergence parameter value and the one first current difference value of approaching voltage-current characteristic curve, and be multiplied and produced one first convergence factor, then job initiation point is captured in the point of intersection of the first operating disturbances curve and voltage-current characteristic curve, and job initiation point has job initiation electric current, then on the second operating disturbances curve, the first adjusting point is captured, and the first adjusting point has job initiation electric current and first revises voltage, then on voltage-to-current coordinate system, capture the 5th adjusting point, and the 5th adjusting point has the first correction voltage and one the 3rd correcting current, and the 3rd correcting current is added with the first convergence factor by the first correcting current and produces.
Then on the second operating disturbances curve, one the 6th adjusting point is captured, and the 6th adjusting point has the 3rd correcting current and the 3rd revises voltage, finally on voltage-to-current coordinate system, capture one the 7th adjusting point, and the 7th adjusting point has the 3rd correction voltage and one the 4th correcting current, and the 4th correcting current is added with the second convergence factor by the second correcting current and produces.
The present invention's effect against existing technologies:
The invention provides the control method that a kind of solar battery array simulator adapts to photovoltaic DC-to-AC converter, due to when its calculation is dispersed, i.e. acquisition convergence parameter value and current difference value, and be multiplied and produced convergence factor, by adding the calculation adjustment of convergence factor, power vs. voltage curve can be allowed gradually to restrain, and then simulate solar battery array in power vs. voltage curve.
Describe the present invention below in conjunction with the drawings and specific embodiments, but not as a limitation of the invention.
Accompanying drawing explanation
The voltage-current curve that Fig. 1 shows prior art controls schematic diagram;
Fig. 2 shows the power vs. voltage curve convergence schematic diagram of prior art;
The voltage-current curve that Fig. 3 shows prior art controls schematic diagram;
The power vs. voltage curve that Fig. 4 shows prior art disperses schematic diagram;
Fig. 5 shows the solar battery array simulator of present pre-ferred embodiments and the block diagram of photovoltaic DC-to-AC converter;
Fig. 6 and Fig. 6 A shows the power vs. voltage curve calculation method flow chart of present pre-ferred embodiments;
Fig. 7 shows voltage-current characteristic curve and the disturbance curve synoptic diagram of present pre-ferred embodiments;
Fig. 8 and Fig. 8 A shows the power vs. voltage curve calculation method schematic diagram of present pre-ferred embodiments.
Wherein, Reference numeral
1 photovoltaic DC-to-AC converter
2 solar battery array simulators
21 processing units
22 acquisition units
23 judging units
24 arithmetic elements
3 loads
The voltage-current characteristic line of 10 solar battery arrays
20 Convergence Distributed Power-voltage curve
30 diverging power-voltage curve
40,40 ' voltage-current characteristic curve
50 disturbance curves
A job initiation point
B first adjusting point
C second adjusting point
D the 3rd adjusting point
E the 4th adjusting point
R1 first operating disturbances curve
R2 second operating disturbances curve
Voc open circuit voltage
Isc short circuit current
Vmp maximum power voltage
Imp maximum power electric current
Δ I, Δ I ' current difference value
Embodiment
Because solar battery array simulator provided by the present invention adapts to the control method of photovoltaic DC-to-AC converter, can be widely used in various calculation instrument and measuring instrument etc., its combination execution mode is too numerous to enumerate, therefore this is no longer going to repeat them, only enumerate one of them preferred embodiment and illustrated.
See also Fig. 5 to Fig. 8 A, Fig. 5 shows the solar battery array simulator of present pre-ferred embodiments and the block diagram of photovoltaic DC-to-AC converter, Fig. 6 and Fig. 6 A shows the power vs. voltage curve calculation method flow chart of present pre-ferred embodiments, Fig. 7 shows voltage-current characteristic curve and the disturbance curve synoptic diagram of present pre-ferred embodiments, Fig. 8 and Fig. 8 A shows the power vs. voltage curve calculation method schematic diagram of present pre-ferred embodiments.
As shown in Figure 5, solar battery array simulator 2 comprises processing unit 21, acquisition unit 22, judging unit 23 and an arithmetic element 24.Acquisition unit 22 is electrically connected at processing unit 21, and judging unit 23 is electrically connected at acquisition unit 22, and arithmetic element 24 is electrically connected at judging unit 23, and load 3 is electrically connected at solar battery array simulator 2.
Present pre-ferred embodiments is the voltage-current characteristic curve utilizing solar battery array simulator 2 to carry out analog solar array, and photovoltaic DC-to-AC converter 1 has multiple disturbance curve 50 (only indicating in figure).Wherein, below for constant current mode (CC Mode) control mode and resistance mode (CRMode) perturbation scheme will be determined.
In addition, in order to make this preferred embodiment comparatively clear, be I by job initiation current definition below
i, first revise voltage be defined as V
1, the first correcting current is defined as I
1, second revise voltage be defined as V
2, the second correcting current is defined as I
2, the 3rd revise voltage be defined as V
3, the 3rd correcting current is defined as I
3and the 4th correcting current is defined as I
4, and power vs. voltage curve calculation method is as rear:
Step S101: capture one first operating disturbances curve and one second operating disturbances curve in those disturbance curves, and define an interval of convergence between the first operating disturbances curve and the second operating disturbances curve.
Step S102: capture a job initiation point in the point of intersection of the first operating disturbances curve and voltage-current characteristic curve.
Step S103: capture one first adjusting point on the second operating disturbances curve.
Step S104: capture one second adjusting point on voltage-current characteristic curve.
Step S105: capture one the 3rd adjusting point on the second operating disturbances curve.
Step S106: capture one the 4th adjusting point on voltage-current characteristic curve.
Step S107: judge whether the 4th adjusting point falls within outside the interval of convergence.
Step S108: acquisition one convergence parameter value and a current difference value of approaching voltage-current characteristic curve, and be multiplied and produce one first convergence factor.
Step S109: capture job initiation point in the point of intersection of the first operating disturbances curve and voltage-current characteristic curve.
Step S110: capture the first adjusting point on the second operating disturbances curve.
Step S111: capture the 5th adjusting point on voltage-to-current coordinate system, and by the first convergence factor computing correcting current.
Step S112: capture one the 6th adjusting point on the second operating disturbances curve.
Step S113: capture one the 7th adjusting point on voltage-to-current coordinate system, and by the second convergence factor computing correcting current.
Step S114: the correction voltage of acquisition the 7th adjusting point and correcting current, uses and mark a convergence data point on power vs. voltage coordinate system.
In above-mentioned power vs. voltage curve calculation method, after step starts, the voltage-current characteristic curve 40 of solar battery array simulator 2 analog solar array, photovoltaic DC-to-AC converter 1 has multiple disturbance curve 50 (only indicating in figure), namely processing unit 21 produces voltage-current characteristic curve 40 as shown in Figure 7 and disturbance curve 50 schematic diagram on voltage-to-current coordinate system, and start to calculate subsequent step, wherein, voltage-current characteristic curve 40 comprises open circuit voltage (Voc), short circuit current (Isc), maximum power voltage (Vmp) and maximum power electric current (Imp) quadrinomial parameter.
After generation voltage-current characteristic curve 40 and disturbance curve 50, enter step S101 immediately and capture one first operating disturbances curve and one second operating disturbances curve in those disturbance curves, and define an interval of convergence between the first operating disturbances curve and the second operating disturbances curve.Wherein, acquisition unit 22 is on voltage-to-current coordinate system, in those disturbance curves 50 (only indicating one in figure), capture one first operating disturbances curve R1 as shown in Figure 8 and one second operating disturbances curve R2, in addition, acquisition unit 22 is in maximum power point (the Maximum Power Point of voltage-current characteristic curve 40; MPP), in, capture the tangent line of this point and produce voltage-current characteristic curve 40 '.Wherein, in the preferred embodiment, be defined as interval of convergence (not shown) by between the first operating disturbances curve R1 and the second operating disturbances curve R2.
After acquisition unit 22 has captured, enter step S102 immediately and capture a job initiation point in the point of intersection of the first operating disturbances curve and voltage-current characteristic curve.Wherein, acquisition unit 22 captures a job initiation point A in the first operating disturbances curve R1 and voltage-current characteristic curve 40 ' confluce, and job initiation point A has job initiation electric current I
i.
After acquisition unit 22 has captured work starting point A, enter step S103 immediately and capture one first adjusting point on the second operating disturbances curve.Wherein, be constant current mode control mode due to solar battery array simulator 2, therefore acquisition unit 22 meeting acquisition one first adjusting point B on the second operating disturbances curve R2, and the first adjusting point B has job initiation electric current I
ivoltage V is revised with one first
1.Namely because be constant current mode control mode, working point can be calculated to the first adjusting point B by job initiation point A.
After acquisition unit 22 has captured the first adjusting point B, namely enter step S104 and capture one second adjusting point on voltage-current characteristic curve.Wherein, because wish controls algorithm convergence in voltage-current characteristic curve 40 ', therefore acquisition unit 22 meeting is in the upper acquisition one second adjusting point C of voltage-current characteristic curve 40 ', and the second adjusting point C has the first correction voltage V
1with one first correcting current I
1.
After acquisition unit 22 has captured the second adjusting point C, namely enter step S105 and capture one the 3rd adjusting point on the second operating disturbances curve.Wherein, be constant current mode control mode due to solar battery array simulator 2, therefore acquisition unit 22 meeting acquisition 1 the 3rd adjusting point D on the second operating disturbances curve R2, and the 3rd adjusting point D has the first correcting current I
1voltage V is revised with one second
2.Namely because be constant current mode control mode, working point can be calculated to the 3rd adjusting point D by the second adjusting point C.
After acquisition unit 22 has captured the 3rd adjusting point D, namely enter step S106 on voltage-current characteristic curve, capture one the 4th adjusting point.Wherein, because wish controls algorithm convergence in voltage-current characteristic curve 40 ', therefore acquisition unit 22 meeting is in upper acquisition 1 the 4th adjusting point E of voltage-current characteristic curve 40 ', and the 4th adjusting point E has the second correction voltage V
2with one second correcting current I
2.
After acquisition unit 22 has captured the 4th adjusting point E, namely enter step S107 and judge whether the 4th adjusting point falls within outside the interval of convergence.Wherein, namely judging unit 23 judges whether the 4th adjusting point falls within outside the interval of convergence.If judging unit 23 judges that the 4th adjusting point E is when falling within the interval of convergence, then carry out correction voltage and correcting current that step S114 captures the 4th adjusting point, use and mark a convergence data point on power vs. voltage coordinate system.Wherein, acquisition unit 22 is that voltage V is revised in acquisition second
2with the second correcting current I
2, use and mark a convergence data point on power vs. voltage coordinate system.
See also Convergence Distributed Power-voltage curve calculation method schematic diagram that Fig. 5 to Fig. 7 and Fig. 8 A, Fig. 8 A shows present pre-ferred embodiments.If judging unit 23 judges that the 4th adjusting point E falls within outside the interval of convergence, enter step S108 acquisition one convergence parameter value and a current difference value of approaching voltage-current characteristic curve immediately, and be multiplied and produce one first convergence factor.Wherein, after acquisition unit 22 captures a convergence parameter value and one first current difference value, and arithmetic element 24 is multiplied with the first current difference value by convergence parameter value and produces the first convergence factor.In addition, in order to make this preferred embodiment comparatively clear, below convergence parameter value being defined as K, the first current difference value is defined as Δ I and the first convergence factor is defined as μ, be i.e. K* Δ I=μ, wherein restraining parameter value K is for being less than 1.
After the complete first convergence factor μ of arithmetic element 24 computing, namely processing unit 21 starts to calculate subsequent step, enters step S109 immediately and captures job initiation point in the point of intersection of the first operating disturbances curve and voltage-current characteristic curve.Wherein, acquisition unit 22, on voltage-to-current coordinate system, capture job initiation point A, and job initiation point A has job initiation electric current I in the confluce of the first operating disturbances curve R1 and voltage-current characteristic curve 40 '
i.
After acquisition unit 22 has captured work starting point A, enter step S110 immediately and capture the first adjusting point on the second operating disturbances curve.Wherein, be constant current mode control mode due to solar battery array simulator 2, therefore acquisition unit 22 meeting acquisition one first adjusting point B on the second operating disturbances curve R2, and the first adjusting point B has job initiation electric current I
ivoltage V is revised with one first
1.Namely because be constant current mode control mode, working point can be calculated to the first adjusting point B by job initiation point A.
After acquisition unit 22 has captured the first adjusting point B, enter step S111 immediately and capture the 5th adjusting point on voltage-to-current coordinate system, and by the first convergence factor computing correcting current.Wherein, acquisition unit 22 captures the 5th adjusting point C ' on voltage-to-current coordinate system, and the 5th adjusting point C ' has the first correction voltage V
1with one the 3rd correcting current I
3.3rd correcting current I
3by the first correcting current I
1be added with the first convergence factor μ and produce, i.e. I3=I1+ μ, because the first current difference value Δ I is that to approach voltage-current characteristic curve 40 ', the first current difference value Δ I be for negative makes μ be negative, therefore I3 is via can be little compared with I1 after arithmetic element 24 computing.
After acquisition unit 22 has captured the 5th adjusting point C ', enter step S112 immediately and capture one the 6th adjusting point on the second operating disturbances curve.Wherein, be constant current mode control mode due to solar battery array simulator 2, therefore acquisition unit 22 can on the second operating disturbances curve R2 acquisition 1 the 6th adjusting point D ', and the 6th adjusting point D ' has the 3rd correcting current I3 and the 3rd and revises voltage V3.Namely because be constant current mode control mode, working point can be calculated to the 6th adjusting point D ' by the 5th adjusting point C '.
After acquisition unit 22 has captured the 6th adjusting point D ', enter step S113 immediately on voltage-to-current coordinate system, capture one the 7th adjusting point, and by the second convergence factor computing correcting current.Wherein, acquisition unit 22 captures the 7th adjusting point E ' on voltage-to-current coordinate system, and the 7th adjusting point E ' has the 3rd correction voltage V3 and the 4th correcting current I4.4th correcting current I4 is added with the second convergence factor μ by the second correcting current I2 and produces, i.e. I4=I2+ μ, because the second current difference value Δ I approaches voltage-current characteristic curve 40 ', second current difference value Δ I ' is for positive number makes μ be positive number, and therefore I4 is large compared with I2 via meeting after arithmetic element 24 computing.
After acquisition unit 22 has captured the 7th adjusting point E ', carry out step S107 immediately and judge whether the 7th adjusting point falls within outside the interval of convergence.Wherein, namely judging unit 23 judges whether the 7th adjusting point falls within outside the interval of convergence.
If judging unit 23 judges that the 7th adjusting point is the words fallen within interval, carry out step S114 immediately when the 7th adjusting point falls within the interval of convergence, capture the 3rd and revise voltage and the 4th correcting current, use and mark a convergence data point on power vs. voltage coordinate system.Wherein, acquisition unit 22 is that voltage V is revised in acquisition the 3rd
3with the 4th correcting current I
4, use and mark a convergence data point on power vs. voltage coordinate system.
After having marked convergence data point, then repeat above-mentioned power vs. voltage curve calculation method and after marking multiple convergence data point, the power vs. voltage curve of convergence can have been simulated and do not have the problem of dispersing.
It is worth mentioning that, if first time still cannot to calculate out the power vs. voltage curve of convergence by convergence factor computing, be the adjustment of convergence parameter value diminished, such as, be 0.8,0.5 and 0.3 gradually to diminish to calculate power vs. voltage curve is restrained.
Certainly; the present invention also can have other various embodiments; when not deviating from the present invention's spirit and essence thereof; those of ordinary skill in the art are when making various corresponding change and distortion according to the present invention, but these change accordingly and are out of shape the protection range that all should belong to the claim appended by the present invention.
Claims (7)
1. a solar battery array simulator adapts to the control method of a photovoltaic DC-to-AC converter, this solar battery array simulator has a voltage-current characteristic curve on a voltage-to-current coordinate system, and this photovoltaic DC-to-AC converter has multiple disturbance curve corresponding to this voltage-to-current coordinate system, it is characterized in that, this control method comprises following steps:
A (), on this voltage-to-current coordinate system, captures one first operating disturbances curve and one second operating disturbances curve, and define an interval of convergence between this first operating disturbances curve and this second operating disturbances curve in the plurality of disturbance curve;
B () captures a job initiation point in the point of intersection of this first operating disturbances curve and this voltage-current characteristic curve, and this job initiation point has a job initiation electric current;
C () captures one first adjusting point on this second operating disturbances curve, and this first adjusting point has this job initiation electric current and one first revises voltage;
D () captures one second adjusting point on this voltage-current characteristic curve, and this second adjusting point has this first correction voltage and one first correcting current;
E () captures one the 3rd adjusting point on this second operating disturbances curve, and the 3rd adjusting point has this first correcting current and one second revises voltage;
F () captures one the 4th adjusting point on this voltage-current characteristic curve, and the 4th adjusting point has this second correction voltage and one second correcting current;
G () judges whether the 4th adjusting point falls within outside this interval of convergence;
(g1) when the 4th adjusting point falls within the interval of convergence, capture this second correction voltage and this second correcting current of the 4th adjusting point, use and mark one first convergence data point on a power vs. voltage coordinate system;
H (), when the 4th adjusting point falls within outside this interval of convergence, acquisition one restrains parameter value and the one first current difference value of approaching this voltage-current characteristic curve, and is multiplied and produces one first convergence factor;
I () captures this job initiation point in the point of intersection of this first operating disturbances curve and this voltage-current characteristic curve, and this job initiation point has this job initiation electric current;
J () captures this first adjusting point on this second operating disturbances curve, and this first adjusting point has this job initiation electric current and this first revises voltage;
K () captures one the 5th adjusting point on this voltage-to-current coordinate system, and the 5th adjusting point has this first correction voltage and one the 3rd correcting current, and the 3rd correcting current is added with this first convergence factor by this first correcting current and produces, wherein this first convergence factor is negative;
L () captures one the 6th adjusting point on this second operating disturbances curve, and the 6th adjusting point has the 3rd correcting current and the 3rd revises voltage; And
M () captures one the 7th adjusting point on this voltage-to-current coordinate system, and capture this convergence parameter value and the one second current difference value of approaching this voltage-current characteristic curve, use and be multiplied and produce one second convergence factor, and the 7th adjusting point has the 3rd correction voltage and one the 4th correcting current, and the 4th correcting current is added with this second convergence factor by this second correcting current and produces, wherein this second convergence factor is positive number.
2. solar battery array simulator according to claim 1 adapts to the control method of a photovoltaic DC-to-AC converter, it is characterized in that, also comprise step (n), when the 7th adjusting point falls within this interval of convergence, capture the 3rd and revise voltage and the 4th correcting current, use this power vs. voltage coordinate system of operating at this solar battery array simulator and this photovoltaic DC-to-AC converter marking one second restrain data point.
3. solar battery array simulator according to claim 2 adapts to the control method of a photovoltaic DC-to-AC converter, it is characterized in that, utilizes a processing unit to calculate out this voltage-current characteristic curve and the plurality of disturbance curve.
4. solar battery array simulator according to claim 1 adapts to the control method of a photovoltaic DC-to-AC converter, it is characterized in that, utilize an acquisition unit to capture this first operating disturbances curve, this second operating disturbances curve, this job initiation point, this first adjusting point, this second adjusting point, the 3rd adjusting point, the 4th adjusting point, this convergence parameter value and this first current difference value and the second current difference value.
5. solar battery array simulator according to claim 4 adapts to the control method of a photovoltaic DC-to-AC converter, it is characterized in that, this step (g) utilizes a judging unit to be electrically connected at this acquisition unit to judge whether the 4th adjusting point falls within outside this interval of convergence.
6. solar battery array simulator according to claim 4 adapts to the control method of a photovoltaic DC-to-AC converter, it is characterized in that, utilize an arithmetic element to be electrically connected at this acquisition unit to calculate this first convergence factor, this second convergence factor, the 3rd correcting current and the 4th correcting current.
7. solar battery array simulator according to claim 1 adapts to the control method of a photovoltaic DC-to-AC converter, it is characterized in that, this convergence parameter value is for being less than 1.
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| CN107102588B (en) * | 2017-05-25 | 2019-04-02 | 哈尔滨工业大学深圳研究生院 | The realization method and system of solar array simulator control outer ring |
| CN111258234B (en) * | 2020-03-20 | 2021-08-03 | 艾德克斯电子（南京）有限公司 | Control method for solar cell array simulator to quickly adapt to photovoltaic inverter |
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| CN101800489A (en) * | 2010-01-13 | 2010-08-11 | 东南大学 | Maximum power tracking and controlling method of single-stage photovoltaic system |
| TW201042416A (en) * | 2009-05-26 | 2010-12-01 | Nat Univ Chin Yi Technology | A maximum power tracking system for photovoltaic power generation systems |
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| TW201042416A (en) * | 2009-05-26 | 2010-12-01 | Nat Univ Chin Yi Technology | A maximum power tracking system for photovoltaic power generation systems |
| CN101800489A (en) * | 2010-01-13 | 2010-08-11 | 东南大学 | Maximum power tracking and controlling method of single-stage photovoltaic system |
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