CN108390585A - The low harmony wave control system of single-phase H6 gird-connected inverters - Google Patents
The low harmony wave control system of single-phase H6 gird-connected inverters Download PDFInfo
- Publication number
- CN108390585A CN108390585A CN201810196375.8A CN201810196375A CN108390585A CN 108390585 A CN108390585 A CN 108390585A CN 201810196375 A CN201810196375 A CN 201810196375A CN 108390585 A CN108390585 A CN 108390585A
- Authority
- CN
- China
- Prior art keywords
- grid
- current
- inverter
- phase
- filter
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration
- H02M7/53871—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/12—Arrangements for reducing harmonics from ac input or output
- H02M1/126—Arrangements for reducing harmonics from ac input or output using passive filters
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal
- H02M7/537—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters
- H02M7/539—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency
- H02M7/5395—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only, e.g. single switched pulse inverters with automatic control of output wave form or frequency by pulse-width modulation
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0003—Details of control, feedback or regulation circuits
- H02M1/0038—Circuits or arrangements for suppressing, e.g. by masking incorrect turn-on or turn-off signals, e.g. due to current spikes in current mode control
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0048—Circuits or arrangements for reducing losses
-
- 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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/10—Technologies improving the efficiency by using switched-mode power supplies [SMPS], i.e. efficient power electronics conversion e.g. power factor correction or reduction of losses in power supplies or efficient standby modes
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a kind of low harmony wave control systems of single-phase H6 gird-connected inverters, are made of circuit structure and control structure two parts, and circuit structure includes DC voltage E, inverter, filter and power grid ug；Control structure includes grid-connected current detector, capacitance current detector, inner ring current comparator, outer shroud current comparator, quasi- PR controllers, proportional controller K and SPWM signal generator.DC voltage E inversions are alternating voltage by inverter, and power grid u is transmitted to after LCL is filteredg, grid-connected current detector detecting grid-connected current i2Afterwards with reference current irefTogether be sent into outer shroud current comparator, obtained error signal by quasi- PR controllers processing after with icIt is sent into inner ring current comparator together, obtained signal waveform is transmitted to SPWM signal generators after the proportional controller K conditionings, SPWM waves is finally generated and acts on power tube S1~S6.The system can be stablized, efficiently, the grid-connected current of low harmony wave, and control simple, cost is relatively low.
Description
Technical field
The present invention relates to cutting-in control field more particularly to the low harmony wave control systems of single-phase H6 gird-connected inverters.
Background technology
Under the continuous development of New Energy Industry and intelligent micro-grid, inverter as electricity generation grid-connecting core increasingly by
The attention of people.Since gird-connected inverter generally uses the SPWM of upper frequency to modulate, this will cause a large amount of inevitable
High-frequency harmonic electric current flows into power grid, to influence grid-connected current quality.In order to reduce grid-connected current harmonic wave, traditional parallel network reverse
Device generally use L-type filter is connected with power grid, but L-type filter need inductance value it is larger, result in inductive drop increase,
Loss and cost increase, and the response speed of current inner loop is also affected to a certain extent.In recent years, scholar is having studied
After LCL filter is to the high-impedance behavior of high fdrequency component, proposes that the LCL type filter of three ranks can replace L-type filter, select
Can greatly it be decayed high-frequency harmonic electric current with smaller inductance value, and cost is lower, filter effect is more preferable.However LCL type is filtered
Wave device as undamped third-order system, the liability of resonance system can be caused unstable and have to grid-connected current quality it is unfavorable
It influences, therefore first it must be corrected when using LCL filter.
Inhibition for resonance spikes, core are to introduce damping, are divided into passive damping and introduce and active damping introducing two
Kind method.The former is one resistance of series connection on the filter capacitor of LCL filter, and the increase of system damping can weaken resonance point
Peak is conducive to system stabilization but causes new loss.And the thought of active damping is introduced by algorithm, is not had new
Power attenuation is widely used in Practical Project.But existing many algorithms are complex, need between compensating control or belonging to
Current control is connect, dynamic property is poor, is easy that there are steady-state errors.And what traditional research and control method was directed to is all single
Phase H4 topology inverters, compared to the H6 topology inverters that new development in recent years is got up, H4 bridge inverters can not achieve power grid and
The isolation of dc-battery plate, system effectiveness and the power grade that bears are relatively low, can not be suitable for high-power grid-connected occasion.
Invention content
In view of the above problems, the present invention provides a kind of low harmony wave control system of single-phase H6 gird-connected inverters, which draws
Enter efficient single-phase H6 topologys inverter and LCL filtering is carried out to networking electric current, using grid-connected current and capacitance current double-current
Close-loop control scheme eliminate LCL filtering systems damp it is relatively low, there are the defect of resonance, introduce quasi- PR controllers and solve traditional PI control
The problems such as steady-state error existing for device processed and poor anti jamming capability, so as to realize grid-connected system stabilization, efficient, low harmony wave fortune
Row, and cost is relatively low, control is simple.
The present invention specifically adopts the following technical scheme that：
The low harmony wave control system of single-phase H6 gird-connected inverters, is made of circuit structure and control structure two parts：Circuit
Structure includes DC voltage E, inverter, filter and power grid ug, wherein what the inverter was interconnected by six
Single-phase full bridge power tube S1~S6With two sustained diodes1、D2Composition, for being alternating voltage by DC voltage E inversions；Institute
It is LCL filter, including inverter outlet side inductance L to state filter1, grid side inductance L2With filter capacitor C；Control structure packet
Include grid-connected current detector, capacitance current detector, inner ring current comparator, outer shroud current comparator, quasi- PR controllers, ratio
Controller K and SPWM signal generator；The grid-connected current detector is detecting grid-connected current i2Afterwards with reference current iref
It is sent into outer shroud current comparator together, obtained error signal detects after the quasi- PR controllers processing with capacitance current
The i that device detectscIt is sent into inner ring current comparator together, by obtained signal waveform by the proportional controller K conditionings
It is transmitted to the SPWM signal generators afterwards, finally generates SPWM waves and acts on the power tube S1~S6。
Further, the power tube S1~S6In, S1~S4It is IGBT, S5And S6Be MOSFET either IGBT or other
Full-controlled device, and power tube S1~S6It is all made of SPWM controls.
Further, the inverter outlet side inductance L1It is coupled to inverter, grid side inductance L2It is coupled to power grid, LCL
After the alternating voltage that filter transmits inverter is filtered, it is transmitted to power grid ug。
The beneficial effects of the present invention are：The low harmony wave control system of single-phase H6 gird-connected inverters, efficient H6 is opened up
It flutters inverter to be combined with LCL filter, combines quasi- PR controllers that can realize system using double-current close-loop control scheme
DAZ gene improves system stability, and the lower grid-connected current of inversion efficiency higher, harmonic content can be obtained, be suitable for
Each large-power occasions.
Description of the drawings
Fig. 1 is the system structure diagram of the present invention.
Fig. 2 is the current double closed-loop control block diagram of the present invention.
Fig. 3 is the grid-connected current waveform (amplitude amplifies 10 times) and grid voltage waveform of the present invention.
Fig. 4 is the grid-connected current and reference current waveform of the present invention.
Fig. 5 is the percent harmonic distortion of the grid-connected current of the present invention.
Specific implementation mode
Present invention is further described in detail below in conjunction with the accompanying drawings.
As shown in Figure 1, the low harmony wave control system of single-phase H6 gird-connected inverters, by circuit structure and control structure two parts
Composition：Circuit structure includes DC voltage E, inverter, filter and power grid ug, wherein the inverter is connected with each other by six
Single-phase full bridge power tube S together1~S6With two sustained diodes1、D2Composition, for being to hand over by DC voltage E inversions
Galvanic electricity pressure；The filter is LCL filter, including inverter outlet side inductance L1, grid side inductance L2With filter capacitor C；Control
Structure processed includes grid-connected current detector, capacitance current detector, inner ring current comparator, outer shroud current comparator, quasi- PR controls
Device processed, proportional controller K and SPWM signal generator；The grid-connected current detector is detecting grid-connected current i2Afterwards with ginseng
Examine electric current irefBe sent into outer shroud current comparator together, obtained error signal after the described quasi- PR controllers processing with electricity
The i that capacitance current detector detectscIt is sent into inner ring current comparator together, obtained signal waveform is passed through into the ratio control
The SPWM signal generators are transmitted to after device K conditionings processed, SPWM waves is finally generated and acts on the power tube S1~S6。
The power tube S1~S6In, S1~S4It is IGBT, S5And S6It is MOSFET either IGBT or other full-controlled devices,
And power tube S1~S6It is all made of SPWM controls；The inverter outlet side inductance L1It is coupled to inverter, grid side inductance L2Coupling
It is connected to power grid, after the alternating voltage that LCL filter transmits inverter is filtered, is transmitted to power grid ug。
The dynamic response of LCL filter is good, has a harmonics restraint performance more better than L filter, but as third-order system,
The lower system damping of LCL filter can lead to occur resonance spikes at intrinsic frequency, for this purpose, single-phase full-bridge inverter uses
Unipolarity is modulated, and using grid-connected current and the quasi- PR control strategies of capacitance current two close cycles, quasi- PR controller transfer functions are：
In formula, KpFor scale parameter, KRFor resonant parameter, ω0For resonance fundamental wave angular frequency0, ωcFor frequency bandwidth.
Current double closed-loop control block diagram is as shown in Fig. 2, this makes it possible to obtain the transmission functions of double-current feedback control to be：
K in formulaPWMFor the equieffective ratio link of H6 inverter bridges, K is the proportional controller.
The present invention is based on single-phase H6 gird-connected inverters to have carried out simulating, verifying to the LCL filter design scheme of proposition, profit
The result for obtaining being incorporated into the power networks under simulated environment with emulation tool MATLAB/Simulink is as shown in Fig. 3, Fig. 4, Fig. 5：Fig. 3 is
Grid-connected current waveform (amplitude amplify 10 times) and network voltage simulation waveform, as can be seen from the figure network voltage and grid-connected electricity
It is grid-connected to illustrate that high power factor may be implemented in the system almost with frequency with phase for stream；Fig. 4 is the grid-connected electricity of the inversion system
Stream and reference current waveform figure, the two are completely superposed the DAZ gene for illustrating that the control system can realize networking electric current,
System is more stablized；The percent harmonic distortion of wherein five cycles of Fig. 5 grid-connected currents, its content is only 1.06% as seen from the figure,
Effectively current harmonics caused by HF switch, grid-connected quality is inhibited to obtain further improvement.
Claims (4)
1. the low harmony wave control system of single-phase H6 gird-connected inverters, is made of, feature circuit structure and control structure two parts
It is：Circuit structure includes DC voltage E, inverter, filter and power grid ug, wherein the inverter is connected with each other by six
Single-phase full bridge power tube S together1~S6With two sustained diodes1、D2Composition, for being to hand over by DC voltage E inversions
Galvanic electricity pressure；The filter is LCL filter, including inverter outlet side inductance L1, grid side inductance L2With filter capacitor C；Control
Structure processed includes grid-connected current detector, capacitance current detector, inner ring current comparator, outer shroud current comparator, quasi- PR controls
Device processed, proportional controller K and SPWM signal generator；The grid-connected current detector is detecting grid-connected current i2Afterwards with ginseng
Examine electric current irefBe sent into outer shroud current comparator together, obtained error signal after the described quasi- PR controllers processing with electricity
The i that capacitance current detector detectscIt is sent into inner ring current comparator together, obtained signal waveform is passed through into the ratio control
The SPWM signal generators are transmitted to after device K conditionings processed, SPWM waves is finally generated and acts on the power tube S1~S6。
2. the low harmony wave control system of single-phase H6 gird-connected inverters according to claim 1, it is characterised in that：The power
Pipe S1~S6In, S1~S4It is IGBT, S5And S6It is MOSFET either IGBT or other full-controlled devices.
3. the low harmony wave control system of single-phase H6 gird-connected inverters according to claim 1, it is characterised in that：The power
Pipe S1~S6It is all made of Unipolar SPWM control.
4. the low harmony wave control system of single-phase H6 gird-connected inverters according to claim 1, it is characterised in that：Described is inverse
Become device outlet side inductance L1It is connected to the input terminal of the LCL filter, the grid side inductance L2It is connected to the LCL filtering
The input terminal of the output end of device, the LCL filter is coupled to the inverter, and the output end of the LCL filter is coupled to
Power grid after the alternating voltage that the LCL filter transmits the inverter is filtered, is transmitted to power grid ug。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810196375.8A CN108390585A (en) | 2018-03-09 | 2018-03-09 | The low harmony wave control system of single-phase H6 gird-connected inverters |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810196375.8A CN108390585A (en) | 2018-03-09 | 2018-03-09 | The low harmony wave control system of single-phase H6 gird-connected inverters |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN108390585A true CN108390585A (en) | 2018-08-10 |
Family
ID=63067396
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810196375.8A Pending CN108390585A (en) | 2018-03-09 | 2018-03-09 | The low harmony wave control system of single-phase H6 gird-connected inverters |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN108390585A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112003493A (en) * | 2020-08-17 | 2020-11-27 | 许继电源有限公司 | Low-common-mode-voltage non-isolated bidirectional DC/AC converter and control method thereof |
| CN112234809A (en) * | 2020-09-30 | 2021-01-15 | 中南民族大学 | Circuit and method for eliminating secondary ripples of single-phase back-to-back converter device |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120058833A (en) * | 2010-11-30 | 2012-06-08 | 엘에스산전 주식회사 | Grid-connected inverter system |
| CN103475029A (en) * | 2013-09-27 | 2013-12-25 | 重庆大学 | Three-phase LCL type grid-connected inverter control system and method based on pole assignment |
| CN103560690A (en) * | 2013-11-07 | 2014-02-05 | 湖南大学 | Harmonic wave damping control method for one-phase LCL type grid-connected inverter |
| CN104022668A (en) * | 2014-05-30 | 2014-09-03 | 江苏大学 | Three-phase NPC grid-connected inverter based on quasi-proportional resonance control |
| CN205566089U (en) * | 2016-03-25 | 2016-09-07 | 广西电网有限责任公司电力科学研究院 | Single -phase LCL type inverter system that is incorporated into power networks |
| CN106130387A (en) * | 2016-06-27 | 2016-11-16 | 国网江苏省电力公司常州供电公司 | Grid-connected inverters control method containing LCL filter |
-
2018
- 2018-03-09 CN CN201810196375.8A patent/CN108390585A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20120058833A (en) * | 2010-11-30 | 2012-06-08 | 엘에스산전 주식회사 | Grid-connected inverter system |
| CN103475029A (en) * | 2013-09-27 | 2013-12-25 | 重庆大学 | Three-phase LCL type grid-connected inverter control system and method based on pole assignment |
| CN103560690A (en) * | 2013-11-07 | 2014-02-05 | 湖南大学 | Harmonic wave damping control method for one-phase LCL type grid-connected inverter |
| CN104022668A (en) * | 2014-05-30 | 2014-09-03 | 江苏大学 | Three-phase NPC grid-connected inverter based on quasi-proportional resonance control |
| CN205566089U (en) * | 2016-03-25 | 2016-09-07 | 广西电网有限责任公司电力科学研究院 | Single -phase LCL type inverter system that is incorporated into power networks |
| CN106130387A (en) * | 2016-06-27 | 2016-11-16 | 国网江苏省电力公司常州供电公司 | Grid-connected inverters control method containing LCL filter |
Non-Patent Citations (3)
| Title |
|---|
| 嵇保健: "一种高效率H6结构不隔离单相光伏并网逆变器", 《中国电机工程学报》 * |
| 康家玉: "一种基于H6桥单相光伏并网逆变器控制策略的研究", 《可再生能源》 * |
| 雷亚雄: "基于准PR调节器电流双闭环LCL三相并网逆变器控制", 《电力系统保护与控制》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112003493A (en) * | 2020-08-17 | 2020-11-27 | 许继电源有限公司 | Low-common-mode-voltage non-isolated bidirectional DC/AC converter and control method thereof |
| CN112234809A (en) * | 2020-09-30 | 2021-01-15 | 中南民族大学 | Circuit and method for eliminating secondary ripples of single-phase back-to-back converter device |
| CN112234809B (en) * | 2020-09-30 | 2021-11-02 | 中南民族大学 | Circuit and method for eliminating secondary ripples of single-phase back-to-back converter device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN108023352B (en) | Power grid high-frequency impedance remodeling device and method for inhibiting distributed generation resonance | |
| US9859714B2 (en) | Multiple input three-phase inverter with independent MPPT and high efficiency | |
| CN102195287B (en) | Parallel-connection active power filter suitable for three-phase four-wire power grid system | |
| CN111245004B (en) | Composite robust control method of high-frequency SiC photovoltaic grid-connected inverter under weak current network | |
| CN103973121B (en) | single-phase power electronic transformer | |
| CN106208142A (en) | A kind of LCL type combining inverter repeats double-closed-loop control method | |
| CN108173288A (en) | Inhibit the voltage-type impedance adapter control method of multi-inverter grid-connected system resonance | |
| CN106787911A (en) | A kind of miniature photovoltaic grid-connected inverter and control method | |
| CN102608468A (en) | Testing system for detecting characteristics of offshore wind power flexible direct current transmission converter | |
| CN206379726U (en) | Power Quality Comprehensive Treatment Device | |
| CN101950965A (en) | Single-phase and three-phase dual-buck type half-bridge parallel active power filter | |
| CN108390585A (en) | The low harmony wave control system of single-phase H6 gird-connected inverters | |
| CN105958808A (en) | Control method of photovoltaic grid-connected inverter | |
| Antar et al. | Harmonics resonance elimination technique using active static compensation circuit | |
| CN104539181A (en) | Miniature photovoltaic grid-connected inverter based on LLC resonant conversion | |
| CN102025161A (en) | Five-level dual-buck parallel active power filter (APF) and dual-frequency half-wave control method thereof | |
| CN206575376U (en) | A kind of miniature photovoltaic grid-connected inverter | |
| CN108964084B (en) | Improved band-stop filter high-frequency oscillation suppression method for multi-machine parallel system | |
| CN106208059B (en) | Adjustable impedance formula distributed photovoltaic power generation cluster resonance inhibiting system and suppressing method | |
| Kumar et al. | LCL Filter Design and Performance Analysis for Grid Interconnected Systems | |
| Ding et al. | Resonance suppression method for multi-parallel inverters | |
| CN207782680U (en) | A kind of single-phase H6 topologys grid-connected inverter system of low harmony wave | |
| Fei et al. | Design and control of grid connected inverter for harmonic suppression | |
| Liao et al. | Small-signal Stability Analysis of Three-phase Four-wire system Integrated with Single-phase PV Inverters Considering Phase to Phase Coupling | |
| CN111682578B (en) | Three-phase harmonic resonance suppression device and suppression method |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20180810 |
|
| WD01 | Invention patent application deemed withdrawn after publication |