CN206226032U - A kind of solar grid-connected inverter based on FPGA - Google Patents
A kind of solar grid-connected inverter based on FPGA Download PDFInfo
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- CN206226032U CN206226032U CN201621300711.1U CN201621300711U CN206226032U CN 206226032 U CN206226032 U CN 206226032U CN 201621300711 U CN201621300711 U CN 201621300711U CN 206226032 U CN206226032 U CN 206226032U
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- voltage
- fpga
- conversion chip
- transferred
- phase tracking
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Abstract
The utility model discloses a kind of solar grid-connected inverter based on FPGA; including FPGA, phase tracking module, input undervoltage output overcurrent protection module, triangular wave, voltage x current control ring, SPWM generation modules, full-bridge inverting, PWM, AD conversion control, AD conversion chip and DC DC, the FPGA on data acquisition chip；The AD conversion chip after city's electric treatment to being transferred to phase tracking module；The AD conversion chip after filter inductance current processing to being transferred to voltage x current control ring；The AD conversion chip is transferred to phase tracking module after inverter output voltage is processed；The AD conversion chip will be transferred to PWM after the treatment of DC DC output voltages, then export DC DC；The phase tracking module will be transferred to voltage x current control ring after information processing；The voltage x current control ring feeds back information to SPWM generation modules；The SPWM generation modules produce triangular wave and realize full-bridge inverting.The beneficial effect of the utility model is that changing effect is good and equipment protection performance is high.
Description
Technical field
The utility model belongs to solar grid-connected inverter technical field, and in particular to a kind of solar energy based on FPGA is simultaneously
Net inverter.
Background technology
Realize the low direct current energy on solar cell grid-connected can power, it is necessary to a kind of inverter, it is this
Inverter be required to low DC power conversion into grid voltage magnitudes, frequency, phase all same sinusoidal ac,
Just can guarantee that reliable grid-connected power supply.And realize that the major part of inversion is exactly inverter controller.
The changing effect of current solar grid-connected inverter is poor and big to the harm of equipment.
Therefore, design a kind of solar grid-connected inverter based on FPGA and seem very necessary.
Utility model content
The purpose of this utility model is to provide a kind of solar grid-connected inverter based on FPGA, to solve above-mentioned background
The changing effect difference and the problem big to the harm of equipment of current solar grid-connected inverter are proposed in technology.
To achieve the above object, the utility model provides following technical scheme：It is a kind of solar grid-connected inverse based on FPGA
Become device, including FPGA, phase tracking module, input undervoltage output overcurrent protection module, triangular wave, voltage x current control ring,
SPWM generation modules, full-bridge inverting, PWM, AD conversion control, AD conversion chip and DC-DC, the FPGA are arranged on data acquisition
On chip；The AD conversion chip after city's electric treatment to being transferred to phase tracking module；The AD conversion chip is to filter inductance
Voltage x current control ring is transferred to after current processing；The AD conversion chip be transferred to after inverter output voltage is processed phase with
Track module；The AD conversion chip will be transferred to PWM after the treatment of DC-DC output voltages, then export DC-DC；The phase with
Track module will be transferred to voltage x current control ring after information processing；The voltage x current control ring feeds back information to SPWM generations
Module；The SPWM generation modules produce triangular wave and realize full-bridge inverting.
Further, the AD conversion chip is electrically connected with input undervoltage output overcurrent protection module, and to photovoltaic cell
Output voltage carries out overvoltage protection.
Further, the input undervoltage output overcurrent protection module is protected to the electric current of PWM with voltage.
Further, the input undervoltage output overcurrent protection module is electrical with phase tracking module and SPWM generation modules
Connection, realizes under-voltage overcurrent protection.
Further, under-voltage protecting circuit and current foldback circuit are included in the input undervoltage output overcurrent protection module.
Technique effect of the present utility model and advantage：This is based on the solar grid-connected inverter of FPGA, first data acquisition
The line voltage that chip is gathered under the control of FPGA enters horizontal lock with inverter output voltage, it is ensured that inverter output voltage
With line voltage keep phase it is consistent, with phaselocked loop output sinusoidal signal as voltage x current control ring reference signal.Electricity
Current voltage control ring is adjusted under reference signal, filter inductance electric current, the control of the feedback signal of inverter output voltage by PI
Control strategy produces the modulated triangular wave for SPWM generation modules, triangular wave after SPWM generation modules are produced, triangular wave
As the switch controlling signal of full-bridge inverting switching tube；Also having in chip is used for the pwm control signal of DC-DC, by gathering DC-
DC output voltage values carry out real-time regulation pwm pulse width, it is ensured that the stabilization of the High Level DC Voltage of DC-DC outputs, improve conversion effect
Really；Input undervoltage output overcurrent protection module is turned off in time when ensureing when photovoltaic cell output voltage is too low, output overcurrent
SPWM and pwm signal, it is ensured that the safety of equipment so that security protection performance is good.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model.
In figure：FPGA；Phase tracking module；Input undervoltage output overcurrent protection module；Triangular wave；Voltage x current is controlled
Ring；SPWM generation modules；Full-bridge inverting；PWM；AD conversion is controlled；AD conversion chip；DC-DC.
Specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment for being obtained, belongs to the scope of the utility model protection.
The utility model provides a kind of solar grid-connected inverter based on FPGA as shown in Figure 1, including FPGA, phase
Position tracking module, input undervoltage output overcurrent protection module, triangular wave, voltage x current control ring, SPWM generation modules, full-bridge are inverse
Change, PWM, AD conversion control, AD conversion chip and DC-DC, the FPGA are arranged on data acquisition chip；The AD conversion core
Phase tracking module is transferred to after the electric treatment of Pian Dui cities；The AD conversion chip after filter inductance current processing to being transferred to voltage
Current regulator；The AD conversion chip is transferred to phase tracking module after inverter output voltage is processed；The AD conversion core
Piece will be transferred to PWM after the treatment of DC-DC output voltages, then export DC-DC；The phase tracking module will be passed after information processing
It is defeated by voltage x current control ring；The voltage x current control ring feeds back information to SPWM generation modules；The SPWM produces mould
Block produces triangular wave and realizes full-bridge inverting.
Further, the AD conversion chip is electrically connected with input undervoltage output overcurrent protection module, and to photovoltaic cell
Output voltage carries out overvoltage protection.
Further, the input undervoltage output overcurrent protection module is protected to the electric current of PWM with voltage.
Further, the input undervoltage output overcurrent protection module is electrical with phase tracking module and SPWM generation modules
Connection, realizes under-voltage overcurrent protection.
Further, under-voltage protecting circuit and current foldback circuit are included in the input undervoltage output overcurrent protection module.
Operation principle：This is based on the solar grid-connected inverter of FPGA, and data acquisition chip is under the control of FPGA first
The line voltage of collection enters horizontal lock with inverter output voltage, it is ensured that inverter output voltage keeps phase with line voltage
Unanimously, with phaselocked loop export sinusoidal signal as voltage x current control ring reference signal.Voltage x current control ring is in benchmark
Being adjusted control strategy and produced by PI under signal, filter inductance electric current, the control of the feedback signal of inverter output voltage is used for
The modulated triangular wave of SPWM generation modules, after SPWM generation modules are produced, triangular wave is switched triangular wave as full-bridge inverting
The switch controlling signal of pipe；Also having in chip is used for the pwm control signal of DC-DC, by gathering DC-DC output voltage values come real
When adjust pwm pulse width, it is ensured that DC-DC output High Level DC Voltage stabilization, improve changing effect；Input undervoltage was exported
Stream protection module turns off SPWM and pwm signal in time when ensureing when photovoltaic cell output voltage is too low, output overcurrent, it is ensured that set
Standby safety so that security protection performance is good.
Using technical scheme described in the utility model, or those skilled in the art's opening in technical solutions of the utility model
Give, design similar technical scheme, and reach above-mentioned technique effect, be to fall into protection domain of the present utility model.
Claims (5)
1. a kind of solar grid-connected inverter based on FPGA, including FPGA, phase tracking module, input undervoltage output overcurrent are protected
Shield module, triangular wave, voltage x current control ring, SPWM generation modules, full-bridge inverting, PWM, AD conversion control, AD conversion chip
And DC-DC, it is characterised in that：The FPGA is arranged on data acquisition chip；The AD conversion chip after city's electric treatment to passing
It is defeated by phase tracking module；The AD conversion chip after filter inductance current processing to being transferred to voltage x current control ring；It is described
AD conversion chip is transferred to phase tracking module after inverter output voltage is processed；DC-DC is exported electricity by the AD conversion chip
PWM is transferred to after pressure treatment, DC-DC is then exported；The phase tracking module will be transferred to voltage x current control after information processing
Ring processed；The voltage x current control ring feeds back information to SPWM generation modules；The SPWM generation modules produce triangular wave with
And realize full-bridge inverting.
2. a kind of solar grid-connected inverter based on FPGA according to claim 1, it is characterised in that：The AD conversion
Chip is electrically connected with input undervoltage output overcurrent protection module, and carries out overvoltage protection to photovoltaic cell output voltage.
3. a kind of solar grid-connected inverter based on FPGA according to claim 1, it is characterised in that：The input is owed
Pressure output overcurrent protection module is protected to the electric current of PWM with voltage.
4. a kind of solar grid-connected inverter based on FPGA according to claim 1, it is characterised in that：The input is owed
Pressure output overcurrent protection module is electrically connected with phase tracking module and SPWM generation modules, realizes under-voltage overcurrent protection.
5. a kind of solar grid-connected inverter based on FPGA according to claim 1, it is characterised in that：The input is owed
Include under-voltage protecting circuit and current foldback circuit in pressure output overcurrent protection module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621300711.1U CN206226032U (en) | 2016-11-30 | 2016-11-30 | A kind of solar grid-connected inverter based on FPGA |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621300711.1U CN206226032U (en) | 2016-11-30 | 2016-11-30 | A kind of solar grid-connected inverter based on FPGA |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206226032U true CN206226032U (en) | 2017-06-06 |
Family
ID=58787164
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621300711.1U Expired - Fee Related CN206226032U (en) | 2016-11-30 | 2016-11-30 | A kind of solar grid-connected inverter based on FPGA |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN206226032U (en) |
-
2016
- 2016-11-30 CN CN201621300711.1U patent/CN206226032U/en not_active Expired - Fee Related
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| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170606 Termination date: 20171130 |
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| CF01 | Termination of patent right due to non-payment of annual fee |