CN205792212U - A kind of harmonics restraint single-phase photovoltaic grid-connected inverter - Google Patents
A kind of harmonics restraint single-phase photovoltaic grid-connected inverter Download PDFInfo
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- CN205792212U CN205792212U CN201620700539.2U CN201620700539U CN205792212U CN 205792212 U CN205792212 U CN 205792212U CN 201620700539 U CN201620700539 U CN 201620700539U CN 205792212 U CN205792212 U CN 205792212U
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- voltage
- inverter
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- phase
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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
- Y02E40/40—Arrangements for reducing harmonics
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- Photovoltaic Devices (AREA)
- Liquid Crystal (AREA)
- Liquid Crystal Display Device Control (AREA)
Abstract
The utility model discloses a kind of harmonics restraint single-phase photovoltaic grid-connected inverter, mainly include that photovoltaic cell, DC/DC electric pressure converter, DC/AC voltage inverter, LCL filter, STM32 controller one, LCD display one, jtag interface one, A/D converter, voltage detecting, current detecting, STM32 controller two, LCD display two, jtag interface two, voltage is phase-locked, harmonic detecting；Fixing DC voltage conversion is variable DC voltage by DC/DC electric pressure converter；Direct current energy is transformed into alternating current by DC/AC voltage inverter, coincide with the alternating current in electrical network after LCL filter；The voltage and current of a pair DC/DC electric pressure converter of STM32 controller output is analyzed in real time, logical judgment and controlling in real time；Voltage and harmonic wave that LCL filter is exported by STM32 controller two carry out systematic analysis, logical judgment and control in real time, and the alternating current making output is the most smooth, and harmonic content is lower；This photovoltaic DC-to-AC converter efficiency is high, and stable performance, after inversion, harmonic content is few, easily realizes.
Description
Technical field
This utility model belongs to single-phase photovoltaic grid-connected inverter field, is specifically related to a kind of harmonics restraint single-phase photovoltaic grid-connected
Inverter.
Background technology
At present about the research of single-phase photovoltaic grid-connected inverter, often make circuit energy utilization rate on the low side in DC/DC part,
Design complexity is big at DC/AC part Harmonic Voltage content.On control chip selects, generally use dsp processor, though
So dsp processor performance is excellent, but expensive, so can greatly increase the cost of combining inverter.Existing single-phase photovoltaic
It is low to there is power utilization in parallel network reverse controller, poor stability, and the construction cycle is long, and cost is high, the alternating current of output after inversion
The shortcomings such as pressure harmonic content is high.
Utility model content
The purpose of this utility model is to provide a kind of harmonics restraint single-phase photovoltaic grid-connected inverter, is improving power utilization
While, enhance its stability, and reduce the harmonic content of grid-connected output electric current.
In order to achieve the above object, the technical scheme that this utility model is used is:
A kind of harmonics restraint single-phase photovoltaic grid-connected inverter, it is characterised in that: mainly include photovoltaic cell, DC/DC voltage
Transducer, DC/AC voltage inverter, LCL filter, STM32 controller one, LCD display one, jtag interface one, A/D change
Device, voltage detecting, current detecting, STM32 controller two, LCD display two, jtag interface two, voltage are phase-locked, harmonic detecting；
Described photovoltaic cell is connected with DC/DC electric pressure converter, the outfan of DC/DC electric pressure converter and DC/AC voltage inverter
Input is connected, and the outfan of DC/AC voltage inverter is connected with LCL filter；Described STM32 controller one and DC/DC electricity
Pressure converter, LCD display one, jtag interface one, A/D converter are connected, and A/D converter and voltage detecting, current detecting are defeated
Going out end to be connected, voltage detecting input is connected with DC/DC electric pressure converter outfan, current sense input and DC/DC voltage
Converter output end is connected；Described STM32 controller two and DC/AC voltage inverter, LCD display two, jtag interface two, electricity
Pressing phase-locked, harmonic detecting to be connected, the phase-locked input of voltage is connected with LCL filter outfan, harmonic detecting input and LCL filter
Ripple device outfan is connected；Wherein A/D change-over circuit uses model to be AD7767 transducer, and it has high-accuracy data acquisition merit
Can, LCD display one and LCD display two all use the DMT48270T043_01W industry string of Beijing Dwin Technology Co., Ltd.
Mouth touch screen.
This utility model having the beneficial effect that compared with prior art:
This utility model have employed two STM32 control chips, a pair DC/DC electric pressure converter output of STM32 controller
Voltage and current analyze in real time, logical judgment and controlling in real time；The electricity that LCL filter is exported by STM32 controller two
Pressure and harmonic wave carry out systematic analysis, logical judgment and control in real time, and the alternating current making output is the most smooth, and harmonic content is lower；
This photovoltaic DC-to-AC converter efficiency is high, and stable performance, after inversion, harmonic content is few, easily realizes.
Accompanying drawing explanation
Fig. 1 is this utility model structured flowchart.
Detailed description of the invention
Below in conjunction with the accompanying drawings this utility model is described in detail:
As it is shown in figure 1, a kind of harmonics restraint single-phase photovoltaic grid-connected inverter, it is characterised in that: mainly include photovoltaic cell,
DC/DC electric pressure converter, DC/AC voltage inverter, LCL filter, STM32 controller one, LCD display one, jtag interface
One, A/D converter, voltage detecting, current detecting, STM32 controller two, LCD display two, jtag interface two, voltage phase-locked,
Harmonic detecting；Described photovoltaic cell is connected with DC/DC electric pressure converter, the outfan of DC/DC electric pressure converter and DC/AC voltage
The input of inverter is connected, and the outfan of DC/AC voltage inverter is connected with LCL filter；Described STM32 controller one with
DC/DC electric pressure converter, LCD display one, jtag interface one, A/D converter are connected, A/D converter and voltage detecting, electric current
Detection outfan is connected, and voltage detecting input is connected with DC/DC electric pressure converter outfan, current sense input and DC/
DC voltage converter outfan is connected；Described STM32 controller two connects with DC/AC voltage inverter, LCD display two, JTAG
Mouthfuls two, voltage is phase-locked, harmonic detecting is connected, and the phase-locked input of voltage is connected with LCL filter outfan, harmonic detecting input
It is connected with LCL filter outfan；Wherein A/D change-over circuit uses model to be AD7767 transducer, and it has high accuracy data
Acquisition function, LCD display one and LCD display two all use the DMT48270T043_01W of Beijing Dwin Technology Co., Ltd.
Industry serial ports touch screen；The voltage and current of a pair DC/DC electric pressure converter output of STM32 controller is analyzed in real time, is patrolled
Collect and judge and control in real time；Voltage and harmonic wave that LCL filter is exported by STM32 controller two carry out systematic analysis, logic is sentenced
Disconnected and real-time control, the alternating current making output is the most smooth, and harmonic content is lower；This photovoltaic DC-to-AC converter efficiency is high, stable performance,
After inversion, harmonic content is few, easily realizes.
Claims (3)
1. a harmonics restraint single-phase photovoltaic grid-connected inverter, it is characterised in that: mainly include that photovoltaic cell, DC/DC voltage turn
Parallel operation, DC/AC voltage inverter, LCL filter, STM32 controller one, LCD display one, jtag interface one, A/D change
Device, voltage detecting, current detecting, STM32 controller two, LCD display two, jtag interface two, voltage are phase-locked, harmonic detecting；
Described photovoltaic cell is connected with DC/DC electric pressure converter, the outfan of DC/DC electric pressure converter and DC/AC voltage inverter
Input is connected, and the outfan of DC/AC voltage inverter is connected with LCL filter；Described STM32 controller one and DC/DC electricity
Pressure converter, LCD display one, jtag interface one, A/D converter are connected, and A/D converter and voltage detecting, current detecting are defeated
Going out end to be connected, voltage detecting input is connected with DC/DC electric pressure converter outfan, current sense input and DC/DC voltage
Converter output end is connected；Described STM32 controller two and DC/AC voltage inverter, LCD display two, jtag interface two, electricity
Pressing phase-locked, harmonic detecting to be connected, the phase-locked input of voltage is connected with LCL filter outfan, harmonic detecting input and LCL filter
Ripple device outfan is connected.
A kind of harmonics restraint single-phase photovoltaic grid-connected inverter the most according to claim 1, it is characterised in that: described A/D turns
Changing circuit uses model to be AD7767 transducer, and it has high-accuracy data acquisition function.
A kind of harmonics restraint single-phase photovoltaic grid-connected inverter the most according to claim 1, it is characterised in that: described LCD shows
Display screen uses the DMT48270T043_01W industry serial ports touch screen of Beijing Dwin Technology Co., Ltd..
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620700539.2U CN205792212U (en) | 2016-07-04 | 2016-07-04 | A kind of harmonics restraint single-phase photovoltaic grid-connected inverter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201620700539.2U CN205792212U (en) | 2016-07-04 | 2016-07-04 | A kind of harmonics restraint single-phase photovoltaic grid-connected inverter |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN205792212U true CN205792212U (en) | 2016-12-07 |
Family
ID=58123587
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201620700539.2U Expired - Fee Related CN205792212U (en) | 2016-07-04 | 2016-07-04 | A kind of harmonics restraint single-phase photovoltaic grid-connected inverter |
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| Country | Link |
|---|---|
| CN (1) | CN205792212U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108173280A (en) * | 2017-12-29 | 2018-06-15 | 北京天诚同创电气有限公司 | Light stores up integral system |
-
2016
- 2016-07-04 CN CN201620700539.2U patent/CN205792212U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108173280A (en) * | 2017-12-29 | 2018-06-15 | 北京天诚同创电气有限公司 | Light stores up integral system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20161207 Termination date: 20170704 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |