CN107425543A - A kind of DSP control system used in solar power system - Google Patents
A kind of DSP control system used in solar power system Download PDFInfo
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- CN107425543A CN107425543A CN201710519084.3A CN201710519084A CN107425543A CN 107425543 A CN107425543 A CN 107425543A CN 201710519084 A CN201710519084 A CN 201710519084A CN 107425543 A CN107425543 A CN 107425543A
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Classifications
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- H02J3/383—
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
Abstract
The DSP control system used in a kind of solar power system, including power module AC/DC, converter DC/DC, inverter DC/AC, A load, the drive circuits of B first, C voltage sampling circuits, the drive circuits of D second, E voltage x current sample circuits, F control circuits, G LCD display devices, control algolithm adjuster TMS320F2812 and H input through keyboard, the inverter DC/AC uses single-phase full bridge inverter circuit, suitable for large-power occasions；Can effectively improve the antijamming capability of power-supply system, reduce noise, improve reliability, can Instantaneous Control voltage against load have very strong adaptability, export that total harmonic distortion is few, and loss is few.
Description
Technical field
The present invention relates to field of solar thermal power generation, the DSP controls used in especially a kind of solar power system are
System.
Background technology
With the gradual maturation of solar energy generation technology, the utilization and popularization of solar power generation have also obtained quick hair
Exhibition, in field of solar thermal power generation, inverter power supply technology is particularly important, with the appearance of High Performance DSP controller, using number
The ups power of wordization control turns into the focus studied now, can be effectively improved based on the digital double closed-loop control that DSP is realized
The antijamming capability of power-supply system, reduce noise, improve efficiency and reliability, be further advantageous to power supply intelligent management,
Remote maintenance and diagnosis, but existing control system technology and unrealized intelligent management, poor anti jamming capability, noise
Greatly, it is also inconvenient to safeguard, thus needs to design a kind of control system with wide application prospect.
The present invention is exactly for the improvement for solving problem above and carrying out.
The content of the invention
The technical problem to be solved in the invention is to provide one kind and is applicable to large-power occasions, and strong antijamming capability can
It is good and export that total harmonic distortion is few by property, the DSP control system used in a kind of few solar power system is lost.
The present invention is that technical scheme is used by solving its technical problem：
The DSP control system used in a kind of solar power system, including power module AC/DC, converter DC/DC,
Inverter DC/AC, A- load, the drive circuits of B- first, C- voltage sampling circuits, the drive circuits of D- second, E- voltage x currents are adopted
Sample circuit, F- control circuits, G-LCD display devices, control algolithm adjuster TMS320F2812 and H- input through keyboard are described inverse
Become device DC/AC and use single-phase full bridge inverter circuit, suitable for large-power occasions；
The electric signal of the power module AC/DC is conveyed to converter DC/DC, and the converter DC/DC is delivered separately to
Inverter DC/AC and C- voltage sampling circuit, the inverter DC/AC load the electrical energy transportation after conversion to A-；
The E- voltage x currents sample circuit passes to control algolithm regulation after loading acquisition sampled voltage and electric current from A-
Device TMS320F2812；
The C- voltage sampling circuits obtain sampled voltage and and control algolithm adjuster from converter DC/DC
TMS320F2812 passes to F- control circuits together, and the F- control circuits control B- the first drive circuit driving power moulds
Block AC/DC；
The control algolithm adjuster TMS320F2812 and pulse width modulator obtain PWM ripples and are transferred to D- second driving electricity
Road, the drive circuits of D- second control inverter DC/AC；
The control algolithm adjuster TMS320F2812 can receive H- input through keyboard and G-LCD display devices；
Further, the first inversion control switch VS1, the second inversion are included in the equivalent circuit of the inverter DC/AC
Controlling switch VS2, the 3rd inversion control switch VS3, the 4th inversion control switch VS4, inverter load resistance R, LC filtering
Device, inverter input DC power U and pi regulator；
Also include inductance L and electric capacity C, inductance L and electric capacity the C composition in the equivalent circuit of the inverter DC/AC
LC wave filters；
Further, the first inversion control switch VS1, the second inversion control switch VS2, the 3rd inversion control
Switch VS3, the 4th inversion control switch VS4 respectively with four identical diodes in parallel, the first inversion control switch VS1 and
The switch VS2 series connection of second inversion control, the 3rd inversion control switch VS3 and the switch VS4 series connection of the 4th inversion control, first is inverse
Become controlling switch VS1 and the second inversion control switch VS2 is connected respectively on inverter input DC power U both positive and negative polarity；
Inductance L in the LC wave filters is connected to the first inversion control switch VS1 and the second inversion control switch VS2
On the circuit of series connection, the electric capacity C in LC wave filters is connected to the 3rd inversion control switch VS3 and the 4th inversion control switch VS4
On the circuit of series connection；
Wherein, the E- voltage x currents sample circuit includes current sample EI and voltage sample EU, the current sample EI
It is connected with voltage sample EU with LC wave filters, current sample EI and voltage sample EU signal are passed to indifference by pi regulator
Control Q is clapped, the track with zero error Q productions PWM ripples pass to the drive circuits of D- second.
Operation principle is：Whole system is by AC/DC, DC/DC, DC/AC, and filter circuit and other auxiliary circuit groups
Into wherein DC/AC inverter sections are the important compositions of whole system, and inverter uses single-phase full bridge inverter circuit, are applicable big
Power occasion, the sampled voltage and electric current obtained by sampling circuit samples are converted into digital letter by DSP A/D converter
Number, as the feedback signal of digitial controller, through with given output signal relatively after, then by control algolithm adjuster and arteries and veins
Wide modulator obtains the break-make of PWM ripples control IGBT power tubes, so as to change the value of sampled voltage, makes itself and given input electricity
Press equal, given reference voltage can be realized by software mode, thus signal stabilization is without temperature drift, noiseless, very fast in load change
When still can guarantee that output voltage is not distorted.
The beneficial effects of the present invention are：The antijamming capability of power-supply system can be effectively improved, reduces noise, raising can
By property, can Instantaneous Control voltage against load have very strong adaptability, export that total harmonic distortion is few, and loss is few.
Brief description of the drawings
Fig. 1 is the entire block diagram of the DSP control system used in a kind of solar power system proposed by the present invention.
Fig. 2 is inverter equivalent circuit and its control strategy block diagram in Fig. 1.
Embodiment
In order that the technical means, the inventive features, the objects and the advantages of the present invention are easy to understand, below
With reference to diagram and specific embodiment, the present invention is expanded on further.
Shown in reference picture 1, the DSP control system that is used in a kind of solar power system, including power module AC/
DC, converter DC/DC, inverter DC/AC, A- load, the drive circuits of B- first, C- voltage sampling circuits, D- second drive electricity
Road, E- voltage x current sample circuits, F- control circuits, G-LCD display devices, control algolithm adjuster TMS320F2812 and H-
Input through keyboard, the inverter DC/AC uses single-phase full bridge inverter circuit, suitable for large-power occasions；
The electric signal of the power module AC/DC is conveyed to converter DC/DC, and the converter DC/DC is delivered separately to
Inverter DC/AC and C- voltage sampling circuit, the inverter DC/AC load the electrical energy transportation after conversion to A-；
The E- voltage x currents sample circuit passes to control algolithm regulation after loading acquisition sampled voltage and electric current from A-
Device TMS320F2812；
The C- voltage sampling circuits obtain sampled voltage and and control algolithm adjuster from converter DC/DC
TMS320F2812 passes to F- control circuits together, and the F- control circuits control B- the first drive circuit driving power moulds
Block AC/DC；
The control algolithm adjuster TMS320F2812 and pulse width modulator obtain PWM ripples and are transferred to D- second driving electricity
Road, the drive circuits of D- second control inverter DC/AC；
The control algolithm adjuster TMS320F2812 can receive H- input through keyboard and G-LCD display devices；
As shown in Fig. 2 comprising the first inversion control switch VS1, second inverse in the equivalent circuit of the inverter DC/AC
Become controlling switch VS2, the 3rd inversion control switch VS3, the 4th inversion control switch VS4, inverter load resistance R, LC filtering
Device, inverter input DC power U and pi regulator；
Also include inductance L and electric capacity C, inductance L and electric capacity the C composition in the equivalent circuit of the inverter DC/AC
LC wave filters；
Further, the first inversion control switch VS1, the second inversion control switch VS2, the 3rd inversion control
Switch VS3, the 4th inversion control switch VS4 respectively with four identical diodes in parallel, the first inversion control switch VS1 and
The switch VS2 series connection of second inversion control, the 3rd inversion control switch VS3 and the switch VS4 series connection of the 4th inversion control, first is inverse
Become controlling switch VS1 and the second inversion control switch VS2 is connected respectively on inverter input DC power U both positive and negative polarity；
Inductance L in the LC wave filters is connected to the first inversion control switch VS1 and the second inversion control switch VS2
On the circuit of series connection, the electric capacity C in LC wave filters is connected to the 3rd inversion control switch VS3 and the 4th inversion control switch VS4
On the circuit of series connection；
Wherein, the E- voltage x currents sample circuit includes current sample EI and voltage sample EU, the current sample EI
It is connected with voltage sample EU with LC wave filters, current sample EI and voltage sample EU signal are passed to indifference by pi regulator
Control Q is clapped, the track with zero error Q productions PWM ripples pass to the drive circuits of D- second；
As shown in Figure 2, i in figureLFor inductive current, iCFor capacitance current, ioFor load current, uoFor output voltage, r
For circuit damping resistance, x (t)=[u is takeno(t)iL(t)] T is state variable, average voltageIt is system with load current
Input, then the state equation of main circuit is：
Y=Dx
In formula：
Discretization state equation, it can obtain：
X (k+1)=θ x (k)+Γ1u(k)+Γ2io(k)
Y (k)=Dx (k)
In formula：
In formula：TsFor using cycle, ω0For the resonance angular frequency of two-stage LC-filter, it follows that voltage x current from
Dispersion state equation is：
uo(k+1)=θ11uo(k)+θ12iL(k)+Γ11ui(k)+Γ21io(k)
iL(k+1)=θ21uo(k)+θ22iL(k)+Γ12ui(k)+Γ22io(k)
For the control method studied designed by the inverter：Using the sound state of double-closed-loop control algorithm regulating system
Characteristic, inner ring use dead-beat control method, are a kind of effective means for being capable of Instantaneous Control voltage, have to load very strong
Adaptability, especially to nonlinear load, output waveform distortion is small, can improve the dynamic response characteristic of system, and outer shroud is adopted
With the digital PI algorithms of instantaneous value, the instantaneous value signal of output voltage directly feeds back, and compared with reference to sinusoidal voltage, makes output
Voltage stabilization suppresses the distortion of output voltage in setting value, and two kinds of control algolithms can be made up mutually each in control
Deficiency, system is set to obtain preferable control effect.
Inner ring is using interference track with zero error strategy, with reference to discretization state equation and system main circuit diagram analysis result,
Track with zero error implementation method, which can be obtained, is：
Can be by using a second order predictor method to load current io(k+1) carry out having estimated：
io(k+1)=3io(k)-3io(k-1)+io(k-2)
And iref (k+1) can be drawn from outer shroud control algolithm.
Outer voltage uses increment type PI algorithms, and its difference equation can be expressed as：
Δ u (k)=Kp[uref(k)-uref(k-1)]-uo(k)
The quality of pi regulator performance depends on KP, KI selection, and PI parameters can be calculated theoretically, but due to
The perturbation of systematic parameter, using the method for artificial debugging determine that there is actual value.
The generation of PWM ripples, can be with further according to inner loop control algorithm by estimating to obtain sinusoidal reference current iref (k) in advance
Calculate ui(k), so as to the control time switched, i.e. PWM burst length, from KTS~(k+1) TSUsing interval in,
IGBT ON time is：
After obtaining ON time, the value of PWM output registers in DSP is further determined, so that DSP is realized
Control to IGBT make-and-break time.
Whole system is made up of AC/DC, DC/DC, DC/AC, and filter circuit and other auxiliary circuits, wherein DC/AC
Inverter section is the important composition of whole system, and inverter uses single-phase full bridge inverter circuit, is applicable large-power occasions, is led to
Over-sampling circuit samples obtained sampled voltage and electric current and is converted into data signal by DSP A/D converter, as numeral
The feedback signal of controller, through with given output signal relatively after, then obtain by control algolithm adjuster and pulse width modulator
PWM ripples control the break-make of IGBT power tubes, so as to change the value of sampled voltage, make it equal with given input voltage, give
Reference voltage can realize by software mode, thus signal stabilization still can be protected without temperature drift, noiseless when load change is very fast
Card output voltage is not distorted.
The antijamming capability of power-supply system can be effectively improved, reduces noise, improves reliability, can Instantaneous Control voltage pair
Very strong adaptability is loaded with, it is few to export total harmonic distortion, and loss is few.
General principle, principal character and the advantages of the present invention of the present invention has been shown and described above.The technology of the industry
Personnel are it should be appreciated that the present invention is not limited to the above embodiments, and the simply explanation described in above-described embodiment and specification is originally
The principle of invention, various changes and modifications of the present invention are possible without departing from the spirit and scope of the present invention, these changes
Change and improvement all fall within the protetion scope of the claimed invention.The claimed scope of the invention by appended claims and
Its equivalent defines.
Claims (4)
1. the DSP control system used in a kind of solar power system, including power module AC/DC, converter DC/DC is inverse
Become device DC/AC, A- load, the drive circuits of B- first, C- voltage sampling circuits, the drive circuits of D- second, the sampling of E- voltage x currents
Circuit, F- control circuits, G-LCD display devices, control algolithm adjuster TMS320F2812 and H- input through keyboard, its feature exist
In：
The inverter DC/AC uses single-phase full bridge inverter circuit；
The electric signal of the power module AC/DC is conveyed to converter DC/DC, the converter DC/DC and is delivered separately to inversion
Device DC/AC and C- voltage sampling circuit, the inverter DC/AC load the electrical energy transportation after conversion to A-；
The E- voltage x currents sample circuit passes to control algolithm adjuster after loading acquisition sampled voltage and electric current from A-
TMS320F2812；
The C- voltage sampling circuits obtain sampled voltage and and control algolithm adjuster TMS320F2812 from converter DC/DC
F- control circuits are passed to together, and the F- control circuits control B- the first drive circuit driving power modules AC/DC；
The control algolithm adjuster TMS320F2812 and pulse width modulator obtain PWM ripples and are transferred to the drive circuits of D- second, institute
State the drive circuits of D- second and control inverter DC/AC；
The control algolithm adjuster TMS320F2812 can receive H- input through keyboard and G-LCD display devices.
2. the DSP control system used in a kind of solar power system as claimed in claim 1, it is characterised in that described
The first inversion control switch VS1, the second inversion control switch VS2, the 3rd inversion control are included in inverter DC/AC equivalent circuit
System switch VS3, the 4th inversion control switch VS4, inverter load resistance R, LC wave filter, inverter input DC power U and
Pi regulator；
Also include inductance L and electric capacity C, inductance L and electric capacity C composition the LC filters in the equivalent circuit of the inverter DC/AC
Ripple device.
3. the DSP control system used in a kind of solar power system as claimed in claim 2, it is characterised in that described
First inversion control switch VS1, the second inversion control switch VS2, the 3rd inversion control switch VS3, the 4th inversion control switch
VS4 connects with four identical diodes in parallel, the first inversion control switch VS1 and the second inversion control switch VS2 respectively, the
Three inversion controls switch VS3 and the switch VS4 series connection of the 4th inversion control, the first inversion control switch VS1 and the second inversion control
Switch VS2 is connected respectively on inverter input DC power U both positive and negative polarity；
Inductance L in the LC wave filters is connected to what the first inversion control switch VS1 and the second inversion control switch VS2 connected
On circuit, the electric capacity C in LC wave filters is connected to what the 3rd inversion control switch VS3 and the 4th inversion control switch VS4 connected
On circuit.
4. the DSP control system used in a kind of solar power system as claimed in claim 1 or 2, it is characterised in that institute
Stating E- voltage x currents sample circuit includes current sample EI and voltage sample EU, current sample EI and the voltage sample EU and LC
Wave filter is connected, and current sample EI and voltage sample EU signal are passed to track with zero error Q, the dead beat by pi regulator
Control Q production PWM ripples pass to the drive circuits of D- second.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710519084.3A CN107425543A (en) | 2017-06-30 | 2017-06-30 | A kind of DSP control system used in solar power system |
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| CN201710519084.3A CN107425543A (en) | 2017-06-30 | 2017-06-30 | A kind of DSP control system used in solar power system |
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Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106549434A (en) * | 2015-09-17 | 2017-03-29 | 传导控股有限责任公司 | Integrated bidirectional battery charger is generated with rechargeable energy |
| CN106685253A (en) * | 2017-03-22 | 2017-05-17 | 广州炫通电气科技有限公司 | Inversion device and inversion method capable of realizing high adjustable precision of inversion alternating current |
| CN107086600A (en) * | 2017-05-15 | 2017-08-22 | 昆明理工大学 | A kind of solar energy power generating three phase full bridge grid-connected inverting system |
-
2017
- 2017-06-30 CN CN201710519084.3A patent/CN107425543A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106549434A (en) * | 2015-09-17 | 2017-03-29 | 传导控股有限责任公司 | Integrated bidirectional battery charger is generated with rechargeable energy |
| CN106685253A (en) * | 2017-03-22 | 2017-05-17 | 广州炫通电气科技有限公司 | Inversion device and inversion method capable of realizing high adjustable precision of inversion alternating current |
| CN107086600A (en) * | 2017-05-15 | 2017-08-22 | 昆明理工大学 | A kind of solar energy power generating three phase full bridge grid-connected inverting system |
Non-Patent Citations (1)
| Title |
|---|
| 全晓明等: "基于 DSP 无差拍控制的逆变电源研究", 《现代电子技术》 * |
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Application publication date: 20171201 |