CN105186564B - A kind of dynamical solar energy power generating control system and method - Google Patents
A kind of dynamical solar energy power generating control system and method Download PDFInfo
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- CN105186564B CN105186564B CN201510589384.XA CN201510589384A CN105186564B CN 105186564 B CN105186564 B CN 105186564B CN 201510589384 A CN201510589384 A CN 201510589384A CN 105186564 B CN105186564 B CN 105186564B
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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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/30—Reactive power compensation
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Abstract
The invention discloses a kind of dynamical solar energy power generating control systems comprising：Inversion unit, k synchronous buck cell voltage conversion circuit, DC voltage detecting device, AC current detection device, alternating voltage detection device；Further include control unit, measuring inversion unit by each detection device exports to the alternating voltage u of power grids, alternating current is；Described control unit also obtains output voltage U from k group solar photovoltaic cell panelsPVj；Inversion unit pwm signal PWM is calculateda、PWMb、PWMc, signal control inversion unit so that the reactive power of control system output and the DC voltage of inversion unit tend to be steady；K synchronous buck cell voltages conversion circuit pwm signal PWM is calculatedj, signal k synchronous buck cell voltage conversion circuit of control, realization is to every group of independent MPPT controls of k group solar photovoltaic cell panels progress.Correspondingly, the invention also discloses a kind of dynamical solar energy power generating control methods.
Description
Technical field
The present invention relates to a kind of photovoltaic power generation control system and method more particularly to a kind of dynamical photovoltaic hairs
Electric control system and method.
Background technology
The energy is the important substance basis that the mankind depend on for existence and development, and an important factor for influence national security.It passes
The fossil energy of system belongs to non-renewable energy resources, is faced with exhausted danger, simultaneously as burning fossil fuel, makes to air
At serious pollution.
In order to solve energy supply this significant problem, global every country all accelerates the exploitation to new energy.
Solar energy has the characteristics that following as a kind of clean energy resource：First, it is inexhaustible；Second, it is easily obtained, generally existing；
Third, cleaning is pollution-free.
The utilization of solar energy are energy shortage, environmental pollution and the greenhouse effects etc. for solving traditional fossil energy and bringing
The effective way of problem is the ideal alternative energy source of human development.The utilization of solar energy includes mainly solar thermal utilization (such as heating power
Son power generation, roof solar water heater etc.), solar energy power generating, photochemical utilize.Solar energy power generating is by side
Remote rural area and special applications develop to the direction for generating electricity by way of merging two or more grid systems and powering with Integration of building, and solar energy power generating is by supplement energy
Source is to alternative energy source transition.
China's photovoltaic industry is started in the 1970s, entering stable development period, solar-electricity in the mid-90
Pond and module production increase year by year, have leapt to the whole world first at present.
Under a series of stimulation of preferential policies of country, China's theCourse of PV Industry is rapid, China's photovoltaic of the end of the year in 2012
Capacity of installed generator has reached 7,000,000 kilowatts, and the end of the year in 2013 reaches 17,160,000 kilowatts, has reached 28,050,000 thousand within 2014
Watt.
For China's solar energy power generating mainly based on large-scale photovoltaic power station, centralized inverter is at low cost, has very
Big advantage, but the problem that China's photovoltaic plant generally existing solar photovoltaic cell panel efficiency is low, while there is also the sun
It can the low problem of photovoltaic battery panel service life.
Invention content
The purpose of the present invention is to provide a kind of dynamical solar energy power generating control system, which can improve too
Positive energy photovoltaic battery panel efficiency, while extending solar photovoltaic cell panel service life.
Another object of the present invention is to provide a kind of dynamical solar energy power generating control methods, and this method can base
Reach said effect in above system.
To achieve the goals above, the present invention proposes a kind of dynamical solar energy power generating control system, is used for
It is serially connected between k groups solar photovoltaic cell panel and power grid, each group of solar photovoltaic cell panel includes that several are mutually concatenated
Solar photovoltaic cell panel, the control system includes control unit, inversion unit, k synchronous buck cell voltages conversion
Circuit (Buck conversion circuit), DC voltage detecting device, AC current detection device and alternating voltage detection device,
In：
The direct-flow input end of the inversion unit connects with the output end of the k synchronous buck cell voltages conversion circuits
It connects, the ac output end of the inversion unit is connect with the power grid, the control terminal and described control unit of the inversion unit
Inversion unit PWM (pulsewidth modulation) signal output end connection；
The input terminal of described k synchronous buck cell voltage conversion circuit is used for and the k groups solar photovoltaic cell panel
Output end be connected respectively, the k of the control terminal and described control unit of described k synchronous buck cell voltage conversion circuit
A synchronous buck cell voltages conversion circuit pwm signal output end is connected respectively；
The DC voltage detecting device is connect with the DC bus of inversion unit, to detect the direct current of inversion unit
Voltage UDC, the DC voltage detecting device also connect with the direct current signal input terminal of control unit；
The AC current detection device is serially connected between the inversion unit and power grid, to detect inversion unit output
Alternating current is, the AC current detection device also connect with the ac current signal input terminal of control unit；
The ac output end of the alternating voltage detection device and inversion unit connects, to detect the friendship of inversion unit output
Galvanic electricity presses us, the alternating voltage detection device also connect with the ac voltage signal input terminal of control unit；
Described control unit is also connect with k group solar photovoltaic cell panels, to obtain the defeated of k group solar photovoltaic cell panels
The output voltage U of outletPVj, j takes 1~k；Described control unit includes the first pi controller and the second proportional integration control
Device processed；Described control unit obtains inversion unit Reactive Power Control amount u according to following modelsqIt is voltage-controlled with inversion unit direct current
Amount u processedd：
uq=kp1*(Qref-Qs)+ki1*∫(Qref-QS)dt
ud=kp2*(UDC0-UDC)+ki2*∫(UDC0-UDC)dt
In formula, kp1For the proportionality coefficient of the first pi controller；ki1For the integral coefficient of the first pi controller；
QrefFor the reactive power given value of setting；QSIndicate the reactive power of the control system output,
Wherein UsIt is by the alternating voltage u received from alternating voltage detection devicesObtained alternating voltage amplitude, IsIt is to be selfed by receiving
The alternating current i of galvanic electricity flow detection devicesObtained alternating current amplitude,Indicate the angle of alternating voltage and alternating current；
kp2For the proportionality coefficient of the second pi controller, ki2For the integral coefficient of the second pi controller；UDC0For setting
DC voltage given value；
Described control unit is by inversion unit Reactive Power Control amount uqWith inversion unit DC voltage control amount udIt carries out
Dq-abc Parker inverse transformations obtain inversion unit pwm signal PWM corresponding with AC three-phasea、PWMb、PWMc, control list
Member will inversion unit pwm signal PWM corresponding with AC three-phase by its inversion unit pwm signal output enda、PWMb、
PWMcIt is transferred to the control terminal of inversion unit, to control the output voltage of inversion unit so that the idle work(of control system output
Rate is Qref, the DC voltage of inversion unit is UDC0；
Described control unit obtains k synchronous buck cell voltages conversion circuit pwm signal PWM according to following modelsj,j
Take 1~k：
In formula,
Wherein,
Described control unit is synchronous by k by its k synchronous buck cell voltages conversion circuit pwm signal output end
Buck cell voltage conversion circuit pwm signals PWMjThe corresponding control for being transferred to k synchronous buck cell voltage conversion circuit respectively
End processed, to make every group of realization MPPT of k group solar photovoltaic cell panels by controlling k synchronous buck cell voltage conversion circuit
(MPPT maximum power point tracking) controls, and realizes that k synchronous buck cell voltage conversion circuits loss is minimum.
Dynamical solar energy power generating control system of the present invention, by k synchronous buck cell voltage
The control of conversion circuit, realization carry out MPPT controls respectively to every group of solar photovoltaic cell panel in k group solar photovoltaic cell panels
System.Meanwhile by the control to inversion unit, controlling the output voltage of inversion unit so that the idle work(of control system output
Rate is Qref, the DC voltage of inversion unit is UDC0, so that control system output reactive power and inversion unit it is straight
Galvanic electricity pressure tends to be steady.Control system of the present invention is to every group of solar-energy photo-voltaic cell in k group solar photovoltaic cell panels
Plate carries out MPPT controls respectively, substantially increases solar photovoltaic cell panel efficiency, while extending solar photovoltaic cell panel
Service life.Further, since taking synchronous buck technologies so that k of the present invention synchronous buck cell voltages conversion
Circuit overall conversion is efficient, while solving synchronous buck in parallel and controlling the uncoordinated oscillation problem brought.It is of the present invention
Control system cost it is relatively low, competitiveness is strong.
It is described by inversion unit reactive power in dynamical solar energy power generating control system of the present invention
Controlled quentity controlled variable uqWith inversion unit DC voltage control amount udThe transformation for mula for carrying out dq-abc Parker inverse transformations is as follows：
In formula, θ is alternating voltage phase angle, can be by the alternating voltage u received from alternating voltage detection devicesIt obtains.
Further, in dynamical solar energy power generating control system of the present invention, described control unit is
Digital signal processor.
Further, in dynamical solar energy power generating control system of the present invention, the DC voltage inspection
It includes direct current voltage sensor to survey device.
Further, in dynamical solar energy power generating control system of the present invention, the alternating voltage inspection
It includes AC voltage transformer to survey device.
Further, in dynamical solar energy power generating control system of the present invention, the alternating current inspection
It includes AC current sensor to survey device.
Preferably, in dynamical solar energy power generating control system of the present invention, first proportional integration
The proportionality coefficient k of controllerp1Range take 0 ＜ kp1＜ 100, the integral coefficient k of the first proportional plus integral controli1Range take 0 ＜
ki1＜ 10.
Preferably, in dynamical solar energy power generating control system of the present invention, second proportional integration
The proportionality coefficient k of controllerp2Range take 0 ＜ kp2＜ 100, the integral coefficient k of the second proportional plus integral controli2Range take 0 ＜
ki2＜ 10.
Further, in dynamical solar energy power generating control system of the present invention, the inversion unit packet
The three-phase inversion structure being connect with AC three-phase and common DC bus capacitance are included, wherein including per phase inverter structure：First
IGBT (insulated gate bipolar transistor), the 2nd IGBT, wherein the emitter of first IGBT connects the 2nd IGBT's
The collector of collector, the first IGBT is connected by the emitter of the common DC bus capacitance and the 2nd IGBT
It connects, the control terminal of the first IGBT and the 2nd IGBT of the control terminal as inversion unit, with corresponding phase inversion unit PWM
The inversion unit pwm signal output end of the corresponding control unit of signal is connected, wherein the control of first IGBT and the 2nd IGBT
The signal at end processed on the contrary, the current collection extremely inversion unit of the 2nd IGBT ac output end, the common DC bus capacitance two
End is the direct-flow input end of inversion unit, and voltage is the DC voltage U of inversion unitDC。
In said program, since the control terminal of the first IGBT and the control end signal of the 2nd IGBT are on the contrary, control unit
The inversion unit pwm signal of inversion unit pwm signal output end output can be through external phase inverter or by raw inside control unit
At opposite inversion unit pwm signal, inversion unit pwm signal and opposite inversion unit pwm signal are then corresponded into input
The control terminal of the control terminal and the 2nd IGBT of first IGBT.
Further, in dynamical solar energy power generating control system of the present invention, described k synchronous buck
Cell voltage conversion circuit includes：Input filter capacitor, output filter capacitor, the 3rd IGBT, the 4th IGBT and reactor,
One end of the wherein described input filter capacitor is connected to one end of output filter capacitor by concatenated 3rd IGBT and reactor,
The other end of the input filter capacitor is connect with the other end of the output filter capacitor, and the 4th IGBT is connected to described
Between the other end of input filter capacitor and the 3rd IGBT and the tie point of reactor, turn as k synchronous buck cell voltage
The control terminal for changing the 3rd IGBT and the 4th IGBT of the control terminal of circuit, buck units electricity synchronous with k of corresponding phase
Voltage conversion circuit pwm signal PWMjThe synchronous buck cell voltages conversion circuit pwm signal output end of k of corresponding control unit
It is connected, wherein the signal of the control terminal of the third IGBT and the 4th IGBT is on the contrary, the both ends of the input filter capacitor are k
The both ends of the input terminal of synchronous buck cell voltage conversion circuits, the output filter capacitor are k synchronous buck cell voltage
The output end of conversion circuit.
In said program, due to the control terminal of the 3rd IGBT and the control end signal of the 4th IGBT on the contrary, the k of control unit
K synchronous buck cell voltage conversion circuits PWM letter of a synchronous buck cell voltages conversion circuit pwm signal output end output
Number PWMjIt can be through external phase inverter or by generating k opposite synchronous buck cell voltage conversion circuit inside control unit
Pwm signal PWMj, then by k synchronous buck cell voltages conversion circuit pwm signal PWMjIt is mono- with opposite k synchronous buck
First voltage conversion circuit pwm signal PWMjThe control terminal of the control terminal and the 4th IGBT of the 3rd IGBT of corresponding input.In addition, IGBT
It can also be replaced by MOSFET (Metal-Oxide Semiconductor field-effect transistor).
Correspondingly, the present invention also provides a kind of dynamical solar energy power generating control methods comprising step：
K group solar photovoltaic cell panels are connected respectively the input terminal of k synchronous buck cell voltage conversion circuit, should
The output end of k synchronous buck cell voltage conversion circuit is connected to power grid by inversion unit；
Measure the alternating voltage u that inversion unit is input to power grids, alternating current is, and thus obtain alternating voltage amplitude
The angle of Us, alternating current amplitude Is, alternating voltage and alternating currentAnd further obtain the idle work(of control system output
Rate QS, wherein
Its output voltage UPV is obtained from the output end of k group solar photovoltaic cell panelsj, j takes 1~k；
Set reactive power given value Qref, the difference of the reactive power Q S of itself and control system output is subjected to the first ratio
Integration control obtains inversion unit Reactive Power Control amount uq, calculation formula is：
Wherein kp1 is the first proportional plus integral control
Proportionality coefficient, ki1For the integral coefficient of the first proportional plus integral control；
Set DC voltage given value UDC0, measure the DC voltage U of inversion unitDC, DC voltage given value will be set
UDC0With the DC voltage U for measuring inversion unitDCDifference carry out the second proportional plus integral control obtain inversion unit DC voltage control
Measure ud, calculation formula is
ud=kp2*(UDC0-UDC)+ki2*∫(UDC0-UDC) dt, wherein kp2For the second proportional integration
The proportionality coefficient of control, ki2For the integral coefficient of the second proportional plus integral control；
By inversion unit Reactive Power Control amount uqWith inversion unit DC voltage control amount udCarry out dq-abc Parker contravariant
It changes, obtains inversion unit pwm signal PWM corresponding with AC three-phasea、PWMb、PWMc, and it is transmitted to the inversion
The control terminal of unit, to control the output voltage of inversion unit so that the reactive power of control system output is Qref, inversion list
The DC voltage of member is UDC0；
K synchronous buck cell voltages conversion circuit pwm signal PWM is obtained according to following formulaj, j takes 1~k：
In formula,Wherein,
By described k synchronous buck cell voltages conversion circuit pwm signal PWMjCorrespondence is transferred to k synchronous buck respectively
The control terminal of cell voltage conversion circuit, to make k group solar energies by controlling k synchronous buck cell voltage conversion circuit
Lie prostrate every group of realization MPPT controls of solar panel.
Further, in dynamical solar energy power generating control method of the present invention, the dq-abc Parkers
The transformation for mula of inverse transformation is as follows：
In formula, θ is alternating voltage phase angle, can be by the alternating voltage u received from alternating voltage detection devicesIt obtains.
Dynamical solar energy power generating control method of the present invention, by k synchronous buck cell voltage
The control of conversion circuit, realization carry out MPPT controls respectively to every group of solar photovoltaic cell panel in k group solar photovoltaic cell panels
System.Meanwhile by the control to inversion unit, controlling the output voltage of inversion unit so that the idle work(of control system output
Rate is Qref, the DC voltage of inversion unit is UDC0, so that control system output reactive power and inversion unit it is straight
Galvanic electricity pressure tends to be steady.Control method of the present invention is to every group of solar-energy photo-voltaic cell in k group solar photovoltaic cell panels
Plate carries out MPPT controls respectively, substantially increases solar photovoltaic cell panel efficiency, while extending solar photovoltaic cell panel
Service life.Further, since taking synchronous buck technologies so that k of the present invention synchronous buck cell voltages conversion
Circuit overall conversion is efficient, while solving synchronous buck in parallel and controlling the uncoordinated oscillation problem brought.It is of the present invention
Control system cost it is relatively low, competitiveness is strong.
Preferably, in dynamical solar energy power generating control method of the present invention, first proportional integration
The proportionality coefficient k of controlp1Range take 0 ＜ kp1＜ 100, the integral coefficient k of the first proportional plus integral controli1Range take 0 ＜ ki1
＜ 10.
Preferably, in dynamical solar energy power generating control method of the present invention, second proportional integration
The proportionality coefficient k of controlp2Range take 0 ＜ kp2＜ 100, the integral coefficient k of the second proportional plus integral controli2Range take 0 ＜ ki2
＜ 10.
Further, in dynamical solar energy power generating control method of the present invention, the inversion unit packet
The three-phase inversion structure being connect with AC three-phase and common DC bus capacitance are included, wherein including per phase inverter structure：First
IGBT, the 2nd IGBT and common DC bus DC capacitor, wherein the emitter connection described second of first IGBT
The collector of the collector of IGBT, the first IGBT is connect by the DC capacitor with the emitter of the 2nd IGBT,
The control terminal of the first IGBT and the 2nd IGBT of control terminal as inversion unit are believed with corresponding phase inversion unit PWM
The inversion unit pwm signal output end of number corresponding control unit is connected, wherein the control of first IGBT and the 2nd IGBT
The signal at end on the contrary, the current collection extremely inversion unit of the 2nd IGBT ac output end, the common DC bus both ends are inverse
Become the direct-flow input end of unit, voltage is the DC voltage U of inversion unitDC。
Further, in dynamical solar energy power generating control method of the present invention, described k synchronous buck
Cell voltage conversion circuit includes：Input filter capacitor, output filter capacitor, the 3rd IGBT, the 4th IGBT and reactor,
One end of the wherein described input filter capacitor is connected to one end of output filter capacitor by concatenated 3rd IGBT and reactor,
The other end of the input filter capacitor is connect with the other end of the output filter capacitor, and the 4th IGBT is connected to described
Between the other end of input filter capacitor and the 3rd IGBT and the tie point of reactor, turn as k synchronous buck cell voltage
The control terminal for changing the 3rd IGBT and the 4th IGBT of the control terminal of circuit, buck units electricity synchronous with k of corresponding phase
Voltage conversion circuit pwm signal PWMjThe synchronous buck cell voltages conversion circuit pwm signal output end of k of corresponding control unit
It is connected, wherein the signal of the control terminal of the third IGBT and the 4th IGBT is on the contrary, the both ends of the input filter capacitor are k
The both ends of the input terminal of synchronous buck cell voltage conversion circuits, the output filter capacitor are k synchronous buck cell voltage
The output end of conversion circuit.
Dynamical solar energy power generating control system of the present invention compared with prior art, has beneficial below
Effect：
1) solar photovoltaic cell panel efficiency is substantially increased, to substantially increase the efficiency of photovoltaic plant；
2) solar photovoltaic cell panel service life is extended；
3) inexpensive.
Dynamical solar energy power generating control method of the present invention equally has said effect.
Description of the drawings
Fig. 1 is a kind of structure of the dynamical solar energy power generating control system of the present invention under embodiment
Schematic diagram.
Fig. 2 is a kind of inversion of the dynamical solar energy power generating control system of the present invention under embodiment
The topological diagram of unit.
Fig. 3 is a kind of synchronization of the dynamical solar energy power generating control system of the present invention under embodiment
The topological diagram of buck cell voltage conversion circuits.
Fig. 4 is a kind of control of the dynamical solar energy power generating control method of the present invention under embodiment
Schematic diagram.
Specific implementation mode
Dynamical photovoltaic of the present invention is sent out below in conjunction with Figure of description and specific embodiment
Electric control system and method make further explanation.
Fig. 1 illustrates dynamical solar energy power generating control system of the present invention under a kind of embodiment
Structure.As shown in Figure 1, in the present embodiment, k group solar photovoltaic cell panels PV11-PVkn, each group of solar photovoltaic cell panel
The solar photovoltaic cell panel mutually concatenated including n, converts solar energy into electrical energy and through the dynamical of the present embodiment
Solar energy power generating control system 1 is defeated by power grid；The dynamical solar energy power generating control system 1 of the present embodiment is wrapped
It includes：Inversion unit 2, ac output end is connected with power grid, direct-flow input end and k synchronous buck cell voltages conversion circuits
7 output end is connected, k group solar photovoltaic cell panels PV11-PVknOutput end be connected respectively k synchronous buck unit
The input terminal of voltage conversion circuit 7；Direct current voltage sensor 5 is connect with the DC capacitor of inversion unit 2, to detect inversion
The DC voltage U at the DC capacitor both ends of unit 2DC；AC current sensor 4 is serially connected between inversion unit 2 and power grid,
To detect the alternating current i of the output of inversion unit 2s；AC voltage transformer 3 connects with the ac output end of inversion unit 2
It connects, to detect the alternating voltage u of the output of inversion unit 2s, control unit 6 is digital signal processor comprising the first ratio is accumulated
Sub-controller PI1 and the second pi controller PI2, control unit 6 are spread with direct current voltage sensor 5, alternating current respectively
Sensor 4 and AC voltage transformer 3 connect, and receive it and detect obtained DC voltage UDC, alternating voltage usAnd alternating current
is；Control unit 6 also with k group solar photovoltaic cell panels PV11-PVknOutput end connection, with from k group solar-energy photo-voltaic cells
Plate PV11-PVknObtain output voltage UPVj；The inversion unit pwm signal output end of control unit 6 is also corresponding with inversion unit 2
Control terminal connects, and controls inversion unit 2；Meanwhile k synchronous buck cell voltage conversion circuit of control unit 6
Control terminal control terminal also corresponding with k synchronous buck cell voltages conversion circuit 7 connects, to k synchronous buck cell voltage
Conversion circuit 7 is controlled；Control method sees below embodiment of the method, and this method embodiment is realized based on this system embodiment
's.
Fig. 2 shows the three-phase inversion structure and common DC bus capacitance C of the inversion unit 2 of the present embodiment.It is wherein every
Phase inverter structure includes：First IGBTT1, the 2nd IGBTT2, wherein the emitter of the first IGBTT1 connects the 2nd IGBTT2's
The collector of collector, the first IGBTT1 is connect by common DC bus capacitance C with the emitter of the 2nd IGBTT2, as inverse
Become unit control terminal the first IGBTT1 and the 2nd IGBTT2 control terminal, respectively with inversion unit pwm signal PWMa、
PWMb、PWMcWith the opposite inversion unit pwm signal by being generated inside control unitIn
The inversion unit pwm signal output end of control unit corresponding to the signal of corresponding phase is connected, and the current collection of the 2nd IGBT is extremely inverse
Become the ac output end of unit, the both ends common DC bus capacitance C are the direct-flow input end of inversion unit, and voltage is inverse
Become the DC voltage U of unitDC。
Fig. 3 shows a kind of circuit topological structure of the k synchronous buck cell voltages conversion circuit 7 of the present embodiment.This
In the synchronous buck cell voltages conversion circuit of embodiment k 7, each synchronous buck cell voltage conversion circuits include：Input filter
Wave capacitance C1, output filter capacitor C2, the 3rd IGBTT3, the 4th IGBTT4 and reactor L, wherein input filter capacitor C1's
One end is connected to one end of output filter capacitor C2 by concatenated 3rd IGBTT3 and reactor L, input filter capacitor C1's
The other end is connect with the other end of output filter capacitor C2, and the 4th IGBTT4 is connected to the other end and of input filter capacitor C1
Between three IGBTT3 and the tie point of reactor L, the third of the control terminal as k synchronous buck cell voltages conversion circuit 7
The control terminal of IGBTT3 and the 4th IGBTT4, respectively with k synchronous buck cell voltages conversion circuit pwm signal PWMjWith by
The synchronous buck cell voltages conversion circuit pwm signal of opposite k generated inside control unitCorresponding control
The synchronous buck cell voltages conversion circuit pwm signal output end of k of unit is connected, and the both ends of input filter capacitor C1 are k
The both ends of the input terminal of synchronous buck cell voltage conversion circuits, output filter capacitor C2 are that k synchronous buck cell voltage turns
Change the output end of circuit.
Fig. 4 gives dynamical solar energy power generating control method of the present invention under a kind of embodiment
Control principle.This method embodiment is realized based on above system embodiment.
In conjunction with reference to figure 1-4, when the present embodiment works：
First, control unit 6 is initialized, including setting reactive power given value Qref, DC voltage given value UDC0、
The proportionality coefficient k of first pi controller PI1p1The integral coefficient k of (1~100), the first pi controller PI1i1
The proportionality coefficient k of (0~10), the second pi controller PI2p2(1~100) and the second pi controller PI2's
Integral coefficient ki2(0~10).
Later, control unit 6 passes through AC voltage transformer 3, AC current sensor 4 and direct current voltage sensor 5
It measures and obtains alternating voltage us, alternating current isWith DC voltage UDC；From alternating voltage usWith alternating current isObtain alternating voltage
Amplitude Us, alternating current amplitude Is, alternating voltage and alternating current angleAnd alternating voltage phase angle θ, and further
The reactive power Q S of control system output is obtained, calculation formula is
Control unit 6 is from k group solar photovoltaic cell panels PV11-PVknOutput end obtain its output voltage UPVj, j takes 1
~k；
Control unit 6 is by the first pi controller PI1 by reactive power given value QrefWith control system output
Reactive power QSDifference carry out the first proportional plus integral control obtain inversion unit Reactive Power Control amount uq, calculation formula is
uq=kp1*(Qref-QS)+ki1*∫(Qref-QS)dt；
Control unit 6 is by the second pi controller PI2 by the DC voltage given value U of settingDC0With measurement inversion
The DC voltage U of unitDCDifference carry out the second proportional plus integral control obtain inversion unit DC voltage control amount ud, calculate public
Formula is
ud=kp2*(UDC0-UDC)+ki2*∫(UDC0-UDC)dt；
Control unit 6 is by inversion unit Reactive Power Control amount uqWith inversion unit DC voltage control amount udCarry out dq-
Abc Parker inverse transformations, transformation for mula are as follows：
Obtain inversion unit pwm signal PWM corresponding with AC three-phasea、PWMb、PWMc, while it is negated
Obtain opposite inversion unit pwm signalThe signal is controlled accordingly by inversion unit 2
The output voltage of end control inversion unit 2, so that the reactive power of control system output is Qref, the direct current of inversion unit
Voltage is UDC0；
Control unit 6 obtains k synchronous buck cell voltages conversion circuit pwm signal PWM according to following formulaj, j takes 1
~k：
In formula,Wherein,
And by this k synchronous buck cell voltages conversion circuit pwm signal PWMjCorrespondence is transferred to k synchronous buck respectively
The control terminal of cell voltage conversion circuit 7, with by controlling k synchronous buck cell voltages conversion circuit 7 so that k group solar energy
Every group of realization MPPT controls of photovoltaic battery panel.
It should be noted that the above list is only specific embodiments of the present invention, it is clear that the present invention is not limited to implement above
Example has many similar variations therewith.If those skilled in the art directly exports or joins from present disclosure
All deformations expected, are within the scope of protection of the invention.
Claims (15)
1. a kind of dynamical solar energy power generating control system, for being serially connected with k groups solar photovoltaic cell panel and power grid
Between, each group of solar photovoltaic cell panel includes the solar photovoltaic cell panel that several are mutually concatenated；It is characterized in that, institute
It includes control unit to state control system, inversion unit, k synchronous buck cell voltage conversion circuit, DC voltage detecting device,
AC current detection device and alternating voltage detection device, wherein：
The direct-flow input end of the inversion unit is connected with the output end of the k synchronous buck cell voltages conversion circuits, institute
The ac output end for stating inversion unit is connect with the power grid, the inversion of the control terminal and described control unit of the inversion unit
Unit pwm signal output end connects；
The input terminal of described k synchronous buck cell voltage conversion circuit is for defeated with the k groups solar photovoltaic cell panel
Outlet is connected respectively, the control terminal of described k synchronous buck cell voltage conversion circuit and the k of described control unit it is same
Step buck cell voltage conversion circuit pwm signal output ends are connected respectively；
The DC voltage detecting device is connect with the DC bus of inversion unit, to detect the DC voltage of inversion unit
UDC, the DC voltage detecting device also connect with the direct current signal input terminal of control unit；
The AC current detection device is serially connected between the inversion unit and power grid, to detect the exchange of inversion unit output
Electric current is, the AC current detection device also connect with the ac current signal input terminal of control unit；
The ac output end of the alternating voltage detection device and inversion unit connects, to detect the alternating current of inversion unit output
Press us, the alternating voltage detection device also connect with the ac voltage signal input terminal of control unit；
Described control unit is also connect with k group solar photovoltaic cell panels, to obtain the output end of k group solar photovoltaic cell panels
Output voltage UPVj, j takes 1~k；Described control unit includes the first pi controller and the second pi controller；
Described control unit obtains inversion unit Reactive Power Control amount u according to following modelsqWith inversion unit DC voltage control amount
ud：
uq=kp1*(Qref-Qs)+ki1*∫(Qref-Qs)dt
ud=kp2*(UDC0-UDC)+ki2*∫(UDC0-UDC)dt
In formula, kp1For the proportionality coefficient of the first pi controller；ki1For the integral coefficient of the first pi controller；
QrefFor the reactive power given value of setting；QSIndicate the reactive power of the control system output,
Wherein UsIt is by the alternating voltage u received from alternating voltage detection devicesObtained alternating voltage amplitude, IsIt is to be selfed by receiving
The alternating current i of galvanic electricity flow detection devicesObtained alternating current amplitude,Indicate the angle of alternating voltage and alternating current；
kp2For the proportionality coefficient of the second pi controller, ki2For the integral coefficient of the second pi controller；UDC0For setting
DC voltage given value；
Described control unit is by inversion unit Reactive Power Control amount uqWith inversion unit DC voltage control amount udCarry out dq-abc
Parker inverse transformation obtains inversion unit pwm signal PWM corresponding with AC three-phasea、PWMb、PWMc, control unit passes through
Its inversion unit pwm signal output end will inversion unit pwm signal PWM corresponding with AC three-phasea、PWMb、PWMcTransmission
To the control terminal of inversion unit, to control the output voltage of inversion unit so that the reactive power of control system output is Qref,
The DC voltage of inversion unit is UDC0；
Described control unit obtains k synchronous buck cell voltages conversion circuit pwm signal PWM according to following modelsj, j takes 1~
k：
Wherein,
Wherein,
Described control unit is mono- by k synchronous buck by its k synchronous buck cell voltages conversion circuit pwm signal output end
First voltage conversion circuit pwm signal PWMjThe corresponding control terminal for being transferred to k synchronous buck cell voltage conversion circuit respectively, with
By control k synchronous buck cell voltage conversion circuit make every group of realization maximum power of k group solar photovoltaic cell panels with
Track controls.
2. dynamical solar energy power generating control system as described in claim 1, which is characterized in that described control unit
For digital signal processor.
3. dynamical solar energy power generating control system as described in claim 1, which is characterized in that the DC voltage
Detection device includes direct current voltage sensor.
4. dynamical solar energy power generating control system as described in claim 1, which is characterized in that the alternating voltage
Detection device includes AC voltage transformer.
5. dynamical solar energy power generating control system as described in claim 1, which is characterized in that the alternating current
Detection device includes AC current sensor.
6. dynamical solar energy power generating control system as described in claim 1, which is characterized in that first ratio
The proportionality coefficient k of integral controllerp1Range take 0 ＜ kp1＜ 100, the integral coefficient k of the first pi controlleri1Model
It encloses and takes 0 ＜ ki1＜ 10.
7. dynamical solar energy power generating control system as described in claim 1, which is characterized in that second ratio
The proportionality coefficient k of integral controllerp2Range take 0 ＜ kp2＜ 100, the integral coefficient k of the second pi controlleri2Model
It encloses and takes 0 ＜ ki2＜ 10.
8. dynamical solar energy power generating control system as described in claim 1, which is characterized in that the inversion unit
Include the three-phase inversion structure being connected with AC three-phase and common DC bus capacitance, wherein including per phase inverter structure：The
One IGBT, the 2nd IGBT, wherein the emitter of first IGBT connects the collector of the 2nd IGBT, the first IGBT
Collector connect with the emitter of the 2nd IGBT by the common DC bus capacitance, the control as inversion unit
The control terminal of first IGBT and the 2nd IGBT at end, control unit corresponding with corresponding phase inversion unit pwm signal
Inversion unit pwm signal output end is connected, wherein the signal of the control terminal of first IGBT and the 2nd IGBT is on the contrary, second
The ac output end of the current collection of IGBT extremely inversion unit, common DC bus capacitance both ends are that the direct current of inversion unit is defeated
Enter end, voltage is the DC voltage U of inversion unitDC。
9. dynamical solar energy power generating control system as described in claim 1, which is characterized in that the k synchronization
Buck cell voltage conversion circuits include：Input filter capacitor, output filter capacitor, the 3rd IGBT, the 4th IGBT and electricity
Anti- device, wherein one end of the input filter capacitor is connected to output filter capacitor by concatenated 3rd IGBT and reactor
One end, the other end of the input filter capacitor are connect with the other end of the output filter capacitor, the 4th IGBT connections
Between the other end and the 3rd IGBT and the tie point of reactor of the input filter capacitor, as k synchronous buck unit
The control terminal of the 3rd IGBT and the 4th IGBT of the control terminal of voltage conversion circuit, buck synchronous with k of corresponding phase
Cell voltage conversion circuit pwm signal PWMjThe synchronous buck cell voltages conversion circuit pwm signal of k of corresponding control unit
Output end be connected, wherein the signal of the control terminal of the third IGBT and the 4th IGBT on the contrary, the input filter capacitor two
End is the input terminal of k synchronous buck cell voltage conversion circuit, and the both ends of the output filter capacitor are that k synchronous buck is mono-
The output end of first voltage conversion circuit.
10. a kind of control method of dynamical solar energy power generating control system as described in claim 1, feature exist
In, including step：
K group solar photovoltaic cell panels are connected respectively the input terminal of k synchronous buck cell voltage conversion circuit, and the k is a
The output end of synchronous buck cell voltage conversion circuits is connected to power grid by inversion unit；
Measure the alternating voltage u that inversion unit is input to power grids, alternating current is, and thus obtain alternating voltage amplitude Us, hand over
Flow current amplitude Is, alternating voltage and alternating current angleAnd further obtain the reactive power Q of control system outputS,
Wherein
Its output voltage U is obtained from the output end of k group solar photovoltaic cell panelsPVj, j takes 1~k；
Set reactive power given value Qref, by the reactive power Q of itself and control system outputSDifference carry out the first proportional integration control
Inversion unit Reactive Power Control amount u is madeq, calculation formula is：
uq=kp1*(Qref-QS)+ki1*∫(Qref-QS) dt, wherein kp1For the proportionality coefficient of the first proportional plus integral control, ki1It is
The integral coefficient of one proportional plus integral control；
Set DC voltage given value UDC0, measure the DC voltage U of inversion unitDC, DC voltage given value U will be setDC0With
Measure the DC voltage U of inversion unitDCDifference carry out the second proportional plus integral control obtain inversion unit DC voltage control amount ud,
Its calculation formula is
ud=kp2*(UDC0-UDC)+ki2*∫(UDC0-UDC) dt, wherein kp2For the proportionality coefficient of the second proportional plus integral control, ki2It is
The integral coefficient of two proportional plus integral controls；
By inversion unit Reactive Power Control amount uqWith inversion unit DC voltage control amount udDq-abc Parker inverse transformations are carried out,
Obtain inversion unit pwm signal PWM corresponding with AC three-phasea、PWMb、PWMc, and it is transmitted to the inversion unit
Control terminal, to control the output voltage of inversion unit so that control system output reactive power be Qref, inversion unit
DC voltage is UDC0；
K synchronous buck cell voltages conversion circuit pwm signal PWM is obtained according to following formulaj, j takes 1~k：
In formula,Wherein,
By described k synchronous buck cell voltages conversion circuit pwm signal PWMjCorrespondence is transferred to k synchronous buck unit respectively
The control terminal of voltage conversion circuit, to make k group solar photovoltaics by controlling k synchronous buck cell voltage conversion circuit
The every group of realization maximal power tracing control of pond plate.
11. control method as claimed in claim 10, which is characterized in that the dq-abc Parkers reconstructed formula is：
In formula, θ is alternating voltage phase angle.
12. control method as claimed in claim 10, which is characterized in that the proportionality coefficient k of first proportional plus integral controlp1
Range take 0 ＜ kp1＜ 100, the integral coefficient k of the first proportional plus integral controli1Range take 0 ＜ ki1＜ 10.
13. control method as claimed in claim 10, which is characterized in that the proportionality coefficient k of second proportional plus integral controlp2
Range take 0 ＜ kp2＜ 100, the integral coefficient k of the second proportional plus integral controli2Range take 0 ＜ ki2＜ 10.
14. control method as claimed in claim 10, which is characterized in that the inversion unit includes being connected with AC three-phase
Three-phase inversion structure and common DC bus capacitance, wherein including per phase inverter structure：First IGBT, the 2nd IGBT, wherein
The emitter of first IGBT connects the collector of the 2nd IGBT, and the collector of the first IGBT passes through described public
Dc-link capacitance is connect with the emitter of the 2nd IGBT, the first IGBT of the control terminal as inversion unit and
The control terminal of two IGBT, the inversion unit pwm signal output end of control unit corresponding with corresponding phase inversion unit pwm signal
Be connected, wherein the signal of the control terminal of first IGBT and the 2nd IGBT on the contrary, the 2nd IGBT current collection extremely inversion unit
Ac output end, common DC bus capacitance both ends be inversion unit direct-flow input end, voltage be inversion unit
DC voltage UDC。
15. control method as claimed in claim 10, which is characterized in that described k synchronous buck cell voltage conversion circuit
Include：Input filter capacitor, output filter capacitor, the 3rd IGBT, the 4th IGBT and reactor, wherein the input filter
One end of capacitance is connected to one end of output filter capacitor, the input filter capacitor by concatenated 3rd IGBT and reactor
The other end connect with the other end of the output filter capacitor, the 4th IGBT is connected to the another of the input filter capacitor
Between one end and the 3rd IGBT and the tie point of reactor, control terminal as k synchronous buck cell voltage conversion circuit
The control terminal of 3rd IGBT and the 4th IGBT, buck cell voltage conversion circuit pwm signals synchronous with k of corresponding phase
PWMjThe synchronous buck cell voltages conversion circuit pwm signal output end of k of corresponding control unit is connected, wherein the third
The signal of the control terminal of IGBT and the 4th IGBT is on the contrary, the both ends of the input filter capacitor are k synchronous buck cell voltage
The input terminal of conversion circuit, the both ends of the output filter capacitor are the output end of k synchronous buck cell voltage conversion circuit.
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Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102684183A (en) * | 2012-05-08 | 2012-09-19 | 吕遥 | DC LAN (Direct Current Local Area Network)-based distributed power generation system and control method |
| CN102769285A (en) * | 2012-08-08 | 2012-11-07 | 北方工业大学 | PV module parallel array and method for realizing voltage autotracking |
| CN203232352U (en) * | 2013-05-16 | 2013-10-09 | 北京恒电电源设备有限公司 | MPPT (maximum power point tracking) solar controller based on BUCK circuit |
| CN203313097U (en) * | 2013-06-04 | 2013-11-27 | 深圳市长昊机电有限公司 | Large power photovoltaic power generation system |
| US8618456B2 (en) * | 2010-02-16 | 2013-12-31 | Western Gas And Electric Company | Inverter for a three-phase AC photovoltaic system |
| CN103825299A (en) * | 2014-02-28 | 2014-05-28 | 深圳市长昊机电有限公司 | Grid-connected photovoltaic power generation system and control method thereof |
| CN104701877A (en) * | 2013-12-06 | 2015-06-10 | 广西大学 | Novel building photovoltaic power generation maximum power point tracking and grid connection control device |
-
2015
- 2015-09-16 CN CN201510589384.XA patent/CN105186564B/en active Active
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US8618456B2 (en) * | 2010-02-16 | 2013-12-31 | Western Gas And Electric Company | Inverter for a three-phase AC photovoltaic system |
| CN102684183A (en) * | 2012-05-08 | 2012-09-19 | 吕遥 | DC LAN (Direct Current Local Area Network)-based distributed power generation system and control method |
| CN102769285A (en) * | 2012-08-08 | 2012-11-07 | 北方工业大学 | PV module parallel array and method for realizing voltage autotracking |
| CN203232352U (en) * | 2013-05-16 | 2013-10-09 | 北京恒电电源设备有限公司 | MPPT (maximum power point tracking) solar controller based on BUCK circuit |
| CN203313097U (en) * | 2013-06-04 | 2013-11-27 | 深圳市长昊机电有限公司 | Large power photovoltaic power generation system |
| CN104701877A (en) * | 2013-12-06 | 2015-06-10 | 广西大学 | Novel building photovoltaic power generation maximum power point tracking and grid connection control device |
| CN103825299A (en) * | 2014-02-28 | 2014-05-28 | 深圳市长昊机电有限公司 | Grid-connected photovoltaic power generation system and control method thereof |
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