CN109546877A - A kind of static synchronous compensating device - Google Patents
A kind of static synchronous compensating device Download PDFInfo
- Publication number
- CN109546877A CN109546877A CN201811461651.5A CN201811461651A CN109546877A CN 109546877 A CN109546877 A CN 109546877A CN 201811461651 A CN201811461651 A CN 201811461651A CN 109546877 A CN109546877 A CN 109546877A
- Authority
- CN
- China
- Prior art keywords
- electrical level
- level inverter
- bridge arm
- striding capacitance
- switch
- 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.)
- Granted
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
- H02M7/483—Converters with outputs that each can have more than two voltages levels
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
-
- 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
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
- H02M1/007—Plural converter units in cascade
-
- 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
- Y02E40/10—Flexible AC transmission systems [FACTS]
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a kind of static synchronous compensating devices, including multiple multi-electrical level inverters, the multi-electrical level inverter mutually cascades, the multi-electrical level inverter includes at least a striding capacitance, the both ends of the striding capacitance are in parallel with two bridge arm units, the bridge arm unit includes the first switch and the second switch of series aiding connection, the anode of the striding capacitance is connect with the cathode of the bridge arm unit, the cathode of the striding capacitance is connect with the anode of the bridge arm unit, wherein, the midpoint of first bridge arm unit is the first output end of the multi-electrical level inverter, the midpoint of second bridge arm unit is the second output terminal of the multi-electrical level inverter.Static synchronous compensating device of the invention can be realized the application of symmetrical striding capacitance type multi-electrical level inverter, has the characteristics that easily to extend, and can press naturally, have the characteristics that efficient.
Description
Technical field
The invention belongs to inversion transformation technique fields, and in particular to a kind of static synchronous compensating device and its control method.
Background technique
Multi-electrical level inverter is suitble to high-power applications occasion.Multi-electrical level inverter output voltage stabilization, high-efficient, electromagnetism are done
Disturb small and lower switching voltage stress.The quality of inverter output voltage depends on about voltage order.Multi-electrical level inverter
Level number is more, and the voltage waveform of output is closer close to sinusoidal waveform, thus reduce the size of output inductor, and
Reduce the loss of circuit on the whole.
Based on above-mentioned advantage, multi-electrical level inverter is applied to electric power grid-connected system, such as photovoltaic (PV) grid-connected system
System and wind power-generating grid-connected system.Simultaneously in the power system, the static synchronous compensating device based on multi-electrical level inverter
It (STATCOM) can be with stabilized supply voltage, compensation system active power and reactive power.
When multi-electrical level inverter is used for STATCOM in application, using DC capacitor in its DC side, and would generally use
Multiple concatenated modes of DC capacitor, but thus cause the problem of pressing.Striding capacitance type multi-electrical level inverter topology utilizes
Capacitor-clamped has nature balance of voltage characteristic.In general, there are two types of voltage balancing methods.First method is open loop control
System is pressed by the balance of voltage characteristic realization of striding capacitance type multi-electrical level inverter topology；Second method is to pass through feedback
Control strategy is pressed to realize.
Therefore, based on DC power supply whether balanced configuration, multi-electrical level inverter is divided into two types: symmetrical more level
Inverter and asymmetric multi-electrical level inverter.It is real that asymmetric multi-electrical level inverter is able to use lesser amount of switching device
It is existing, thus widely studied, however, being the shortcomings that this topological structure: if increasing the level number of inverter output voltage,
The voltage value for needing to adjust DC capacitor needs complicated equilibrium feedback control.Symmetrical multi-electrical level inverter has easily extension
Characteristic, be suitable for high-power applications.
Summary of the invention
The present invention exactly thinks and in this, provides a kind of symmetrical striding capacitance type multi-electrical level inverter, be applied to quiet
Only synchronous compensator plant, the static synchronous compensating device based on the multi-electrical level inverter have capacitor utilization rate equal, started
The advantages that self-balancing is realized in journey.
A kind of static synchronous compensating device, including multiple multi-electrical level inverters, the multi-electrical level inverter mutually cascade, institute
Multi-electrical level inverter is stated including at least a striding capacitance, the both ends of the striding capacitance are in parallel with two bridge arm units, described
Bridge arm unit includes the first switch and the second switch of series aiding connection, the yin of the anode and the bridge arm unit of the striding capacitance
Pole connection, the cathode of the striding capacitance are connect with the anode of the bridge arm unit, wherein the midpoint of the first bridge arm unit
For the first output end of the multi-electrical level inverter, the midpoint of the second bridge arm unit is the second of the multi-electrical level inverter
Output end.
In a preferred embodiment of the invention, the multi-electrical level inverter includes two striding capacitances, wherein described in second
Striding capacitance is connected to the second bridge arm midpoint, the second striding capacitance and the first striding capacitance series aiding connection, the
Bridge arm unit described in the both ends parallel connection third of two striding capacitances, anode and the bridge arm described in third of the second striding capacitance
The cathode of unit connects, the anode connection of bridge arm unit described in the cathode and third of the second striding capacitance, bridge described in third
The midpoint of arm unit is the second output terminal of the multi-electrical level inverter.
In a preferred embodiment of the invention, the multi-electrical level inverter is mutual by the first output end and second output terminal
Series connection.
It is in parallel with power grid by an inductance after the multi-electrical level inverter cascade in a preferred embodiment of the invention, be
Power grid provides active power or reactive power.
In a preferred embodiment of the invention, the bridge arm unit includes the first switch and the second switch of series aiding connection,
The first switch and the second switch respectively include body diode in parallel, the cathode of the body diode of the first switch
It is connect with the anode of the body diode of the second switch, the anode of the body diode of institute's first switch is the bridge arm unit
Anode, the cathode of the body diode of the second switch are the cathode of the bridge arm unit.
In a preferred embodiment of the invention, the striding capacitance is DC capacitor, has anode and cathode.Described in first
The positive second switch through the second bridge arm unit of striding capacitance is connect with the cathode of the second striding capacitance.
The present invention also provides the control methods of the static synchronous compensating device, include the following steps:
First step samples the voltage of striding capacitance；
Second step calculates the average voltage of striding capacitance；
Third step calculates the average voltage of multi-electrical level inverter；
Four steps is calculated according to the voltage reference value of the average voltage of multi-electrical level inverter and multi-electrical level inverter
Active power reference value；
5th step, according to active power reference value and reactive power reference qref and the output electric current of multi-electrical level inverter
Value of feedback calculates the reference value of multi-electrical level inverter output voltage；
6th step calculates the output voltage of multi-electrical level inverter according to the output voltage average value of multi-electrical level inverter
Error amount；
7th step, according to the reference value of the output voltage of multi-electrical level inverter and error amount export the first switch and
The control signal of second switch.
In a preferred embodiment of the invention, the method that the 7th step includes phase-shift PWM and multi-carrier PWM combination,
Phase-shift PWM controlled has been carried out between the carrier wave of the multiple multi-electrical level inverter, has been moved between the carrier wave of multiple multi-electrical level inverters
The angle of phase is 360 ° divided by cascade multi-electrical level inverter number, and each multi-electrical level inverter carries out multi-carrier PWM control
System.
Beneficial effect, the present invention provides a kind of static synchronous compensating devices, how electric realize symmetrical striding capacitance type
The application of flat inverter has the advantages that voltage self-balancing.
For allow invention features described above and advantage can be clearer and more comprehensible, special embodiment below, and cooperate institute's accompanying drawings make
Detailed description are as follows.
Detailed description of the invention
The symmetrical striding capacitance type five-electrical level inverter circuit diagram of Fig. 1 present invention.
Fig. 2 is block diagram of the inverter applied to the circuit of static synchronous compensator (STATCOM) in Fig. 1.
Fig. 3 is the control circuit of circuit in Fig. 2.
Fig. 4 is idle and real power control method block diagram.
Specific embodiment
To keep purpose and the technical solution of the embodiment of the present invention clearer, below in conjunction with the attached of the embodiment of the present invention
Figure, is clearly and completely described the technical solution of the embodiment of the present invention.Obviously, described embodiment is of the invention
A part of the embodiment, instead of all the embodiments.Based on described the embodiment of the present invention, those of ordinary skill in the art
Every other embodiment obtained, shall fall within the protection scope of the present invention under the premise of being not necessarily to creative work.
As shown in Figure 1, a kind of static synchronous compensating device, including n multi-electrical level inverter 101-10n, more level
Inverter 101-10n is mutually cascaded, in parallel with power grid vgrid by inductance L.
The multi-electrical level inverter includes at least a striding capacitance, please refers to shown in Fig. 2, the multi-electrical level inverter 20
Including two striding capacitances, the present invention is not limited thereto, may include a striding capacitance or more striding capacitances.Institute
The both ends for stating striding capacitance C11 are in parallel with the first bridge arm unit, and the first bridge arm unit includes the first switch of series aiding connection
S11 and second switch S12, the cathode of the striding capacitance C11 is connect with the anode of the body diode of first switch S11, described
The anode of striding capacitance C11 is connect with the cathode of the body diode of the second switch S12, and the second bridge arm unit includes same
To the body diode of the cathode of concatenated first switch S13 and second switch S14, the striding capacitance C11 and first switch S13
Anode connection, the striding capacitance C11 anode connect with the cathode of the body diode of the second switch S14, the second institute
It states striding capacitance C12 and is connected to the second bridge arm midpoint, the second striding capacitance C11 of striding capacitance C12 and first
Series aiding connection, the anode of the second striding capacitance C12 pass through the cathode of the striding capacitance C11 of first switch S13 and first
Connection.Bridge arm unit described in the both ends parallel connection third of the second striding capacitance C12, bridge arm unit described in third include string in the same direction
The of the anode of the first switch S15 of connection and second switch S16, the second striding capacitance C12 and bridge arm unit described in third
The cathode of the body diode of one switch S15 connects, and the of bridge arm unit described in the cathode and third of the second striding capacitance
The anode of the body diode of two switch S16 connects, and the midpoint P12 of bridge arm unit described in third is the multi-electrical level inverter 20
Second output terminal.
First switch and the second switch complementation turn-on and turn-off in the bridge arm unit.
The present invention also provides the control methods of the static synchronous compensating device, as shown in figure 3, to be applied to shown in Fig. 2
For multi-electrical level inverter, and static synchronous compensating device shown in FIG. 1, packet are formed using 3 Fig. 2 multi-electrical level inverter cascades
Include following steps:
First step 31 samples the voltage of striding capacitance: vC11, vC12, vC21, vC22, vC31, vC32；
Second step 32 calculates the average voltage of striding capacitance: vC1=1/2 (vC11+vC12)； vC2=1/2 (vC21+vC22)；
vC3=1/2 (vC13+vC13)；
Third step 33 calculates the average voltage of multi-electrical level inverter: vc avg=1/3 (vC1+vC2+ vC3)；
Four steps 34, output voltage control: according to the average voltage v of multi-electrical level inverterc avgAnd multi-level inverse conversion
The voltage reference value v of devicec refActive power reference value p* is calculated,
Wherein K2 is the coefficient of setting；
5th step 35, idle and real power control, according to active power reference value p* and reactive power reference qref q* and
The output current sampling data iinv of multi-electrical level inverter calculates the reference value vm* of multi-electrical level inverter output voltage, specific to count
For calculation method as shown in figure 4, wherein phase shifting angle of the ψ between voltage and electric current, m are the number of multi-electrical level inverter, vs is power grid
Voltage value；
6th step 36, intermodule control, it is inverse to calculate more level according to the output voltage average value of multi-electrical level inverter
Become the error amount of the output voltage of device
7th step 37, the control of striding capacitance voltage；
8th step 38 exports the first switch according to the reference value of the output voltage of multi-electrical level inverter and error amount
With the control signal of second switch, the method combined using phase-shift PWM and multi-carrier PWM, the multiple multi-electrical level inverter
Phase-shift PWM controlled is carried out between carrier wave, the angle of phase shift is 360 ° divided by cascade between the carrier wave of multiple multi-electrical level inverters
Multi-electrical level inverter number, each multi-electrical level inverter carries out multi-carrier PWM control.
Although the present invention has been disclosed by way of example above, it is not intended to limit the present invention., any technical field
Middle tool usually intellectual, without departing from the spirit and scope of the present invention, when can make some changes and embellishment, thus it is of the invention
Protection scope should be defined by the scope of the appended claims.
Claims (9)
1. a kind of static synchronous compensating device, including multiple multi-electrical level inverters, the multi-electrical level inverter mutually cascade, special
Sign is that the multi-electrical level inverter includes at least a striding capacitance, the both ends of the striding capacitance and two bridge arm units
Parallel connection, the bridge arm unit include the first switch and the second switch of series aiding connection, anode and the bridge of the striding capacitance
The cathode of arm unit connects, and the cathode of the striding capacitance is connect with the anode of the bridge arm unit, wherein the first bridge arm
The midpoint of unit is the first output end of the multi-electrical level inverter, and the midpoint of the second bridge arm unit is that more level are inverse
Become the second output terminal of device.
2. a kind of static synchronous compensating device as described in claim 1, which is characterized in that the multi-electrical level inverter includes two
Striding capacitance, wherein the second striding capacitance is connected to the second bridge arm midpoint, the second striding capacitance and the first institute
Striding capacitance series aiding connection is stated, bridge arm unit described in the both ends parallel connection third of the second striding capacitance, second is described winged across electricity
The anode of appearance is connect with the cathode of bridge arm unit described in third, bridge arm unit described in the cathode and third of the second striding capacitance
Anode connection, the midpoint of bridge arm unit described in third is the second output terminal of the multi-electrical level inverter.
3. a kind of static synchronous compensating device as claimed in claim 2, which is characterized in that the multi-electrical level inverter passes through first
Output end and second output terminal are serially connected.
4. a kind of static synchronous compensating device as claimed in claim 3, which is characterized in that passed through after the multi-electrical level inverter cascade
It is in parallel with power grid to cross an inductance, provides active power or reactive power for power grid.
5. a kind of static synchronous compensating device as claimed in claim 2, which is characterized in that the bridge arm unit includes series aiding connection
First switch and the second switch, the first switch and the second switch respectively include body diode in parallel, described the
The cathode of the body diode of one switch is connect with the anode of the body diode of the second switch, the body diode of institute's first switch
Anode be the bridge arm unit anode, the cathode of the body diode of the second switch is the cathode of the bridge arm unit.
6. a kind of static synchronous compensating device as claimed in claim 2, which is characterized in that the striding capacitance is DC capacitor,
With anode and cathode.
7. a kind of static synchronous compensating device as claimed in claim 6, which is characterized in that the anode warp of the first striding capacitance
The second switch of second bridge arm unit is connect with the cathode of the second striding capacitance.
8. a kind of control method applied to static synchronous compensating device as described in claim 1, which is characterized in that including as follows
Step:
First step samples the voltage of striding capacitance；
Second step calculates the average voltage of striding capacitance；
Third step calculates the average voltage of multi-electrical level inverter；
Four steps calculates active according to the voltage reference value of the average voltage of multi-electrical level inverter and multi-electrical level inverter
Value and power reference；
5th step, according to active power reference value and reactive power reference qref and the output current feedback of multi-electrical level inverter
Value calculates the reference value of multi-electrical level inverter output voltage；
6th step calculates the mistake of the output voltage of multi-electrical level inverter according to the output voltage average value of multi-electrical level inverter
Difference；
7th step exports the first switch and second according to the reference value of the output voltage of multi-electrical level inverter and error amount
The control signal of switch.
9. a kind of control method as claimed in claim 8, which is characterized in that the 7th step includes phase-shift PWM and multicarrier
The method that PWM is combined has carried out phase-shift PWM controlled, multiple multi-level inverse conversions between the carrier wave of the multiple multi-electrical level inverter
The angle of phase shift is 360 ° divided by cascade multi-electrical level inverter number between the carrier wave of device, each multi-electrical level inverter into
The control of row multi-carrier PWM.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811461651.5A CN109546877B (en) | 2018-12-02 | 2018-12-02 | Static synchronous compensation device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201811461651.5A CN109546877B (en) | 2018-12-02 | 2018-12-02 | Static synchronous compensation device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN109546877A true CN109546877A (en) | 2019-03-29 |
| CN109546877B CN109546877B (en) | 2021-02-19 |
Family
ID=65852535
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201811461651.5A Active CN109546877B (en) | 2018-12-02 | 2018-12-02 | Static synchronous compensation device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109546877B (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110212547A (en) * | 2019-04-16 | 2019-09-06 | 清华大学 | Hybrid cascade SVG topology and its control method |
| CN112511028A (en) * | 2020-11-26 | 2021-03-16 | 湖南大学 | Flying capacitor multi-level inverter based on GaN and Si device mixing and control method thereof |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101330260A (en) * | 2008-07-22 | 2008-12-24 | 南京航空航天大学 | Method for synthesizing variable current of high-power staircase waveform with rapid dynamic response speed |
| CN103457271A (en) * | 2013-08-02 | 2013-12-18 | 上海交通大学 | Chained static synchronous compensator with active power adjusting capacity and cascading unit thereof |
| CN105656057A (en) * | 2016-03-11 | 2016-06-08 | 国网天津市电力公司 | Cascading multi-level static synchronous compensator and control method |
| CN106100405A (en) * | 2016-06-30 | 2016-11-09 | 华东交通大学 | A kind of level quinque switch H bridge multi-electrical level inverter |
| WO2017152181A1 (en) * | 2016-03-04 | 2017-09-08 | Qatar Foundation For Education, Science And Community Development | Cascaded packed u-cell multilevel inverter |
| US9923484B2 (en) * | 2014-10-31 | 2018-03-20 | Ecole De Technologie Superieure | Method and system for operating a multilevel electric power inverter |
| CN207947609U (en) * | 2018-01-24 | 2018-10-09 | 中国矿业大学(北京) | Based on Advanced Static Var Compensator of the cascade without bridging current circuit |
| CN108879715A (en) * | 2018-07-05 | 2018-11-23 | 中国矿业大学 | Based on cascade U-Cell topology static synchronous compensator voltage control method |
-
2018
- 2018-12-02 CN CN201811461651.5A patent/CN109546877B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101330260A (en) * | 2008-07-22 | 2008-12-24 | 南京航空航天大学 | Method for synthesizing variable current of high-power staircase waveform with rapid dynamic response speed |
| CN103457271A (en) * | 2013-08-02 | 2013-12-18 | 上海交通大学 | Chained static synchronous compensator with active power adjusting capacity and cascading unit thereof |
| US9923484B2 (en) * | 2014-10-31 | 2018-03-20 | Ecole De Technologie Superieure | Method and system for operating a multilevel electric power inverter |
| WO2017152181A1 (en) * | 2016-03-04 | 2017-09-08 | Qatar Foundation For Education, Science And Community Development | Cascaded packed u-cell multilevel inverter |
| CN105656057A (en) * | 2016-03-11 | 2016-06-08 | 国网天津市电力公司 | Cascading multi-level static synchronous compensator and control method |
| CN106100405A (en) * | 2016-06-30 | 2016-11-09 | 华东交通大学 | A kind of level quinque switch H bridge multi-electrical level inverter |
| CN207947609U (en) * | 2018-01-24 | 2018-10-09 | 中国矿业大学(北京) | Based on Advanced Static Var Compensator of the cascade without bridging current circuit |
| CN108879715A (en) * | 2018-07-05 | 2018-11-23 | 中国矿业大学 | Based on cascade U-Cell topology static synchronous compensator voltage control method |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110212547A (en) * | 2019-04-16 | 2019-09-06 | 清华大学 | Hybrid cascade SVG topology and its control method |
| CN112511028A (en) * | 2020-11-26 | 2021-03-16 | 湖南大学 | Flying capacitor multi-level inverter based on GaN and Si device mixing and control method thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| CN109546877B (en) | 2021-02-19 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US10374522B2 (en) | Three-level circuit and control method for balancing neutral point voltage of the same | |
| CN108566108B (en) | A kind of nine electrical level inverter of two-stage type based on bridge type multi-electrical level switching capacity module | |
| CN104158211B (en) | Based on many power grids system control method of Modular multilevel converter | |
| CN108418455B (en) | A kind of control method of multi-electrical level inverter, device and inverter | |
| CN101951186A (en) | Soft switching three-phase gird-connected inverter additionally provided with freewheeling path | |
| CN107039980B (en) | High-voltage direct current power flow controller | |
| CN108599609B (en) | A kind of improvement phase-shifting carrier wave modulator approach based on three module-cascade H bridges | |
| US20230017288A1 (en) | Topology of series-connected mmc with a small number of modules | |
| CN106100405A (en) | A kind of level quinque switch H bridge multi-electrical level inverter | |
| CN105811796B (en) | A kind of three-level inverter neutral point voltage balance and loss reduce control method | |
| CN105553310A (en) | Low-modulation-index control method for modular multi-level current converter | |
| CN105337520A (en) | Photovoltaic grid-connected converter, photovoltaic power supply system and electric appliance | |
| CN205195587U (en) | Photovoltaic grid-connected converter, photovoltaic power supply system and electric appliance | |
| US20240333135A1 (en) | Inverter apparatus and control method thereof | |
| CN109546877A (en) | A kind of static synchronous compensating device | |
| CN110071652B (en) | Low-leakage-current five-switch non-isolated single-phase photovoltaic grid-connected inverter and grid-connected system | |
| CN109474197B (en) | Novel high-capacity multi-level hybrid clamping type topological structure and topological method | |
| CN102801381A (en) | Controllable transformer device capable of controlling amplitude and phase angle of voltage individually and control method for same | |
| Ouchatti et al. | Modified T-type topology of three-phase multi-level inverter for photovoltaic systems | |
| CN105375515B (en) | A kind of modular multilevel comprehensive compensating device of combination photovoltaic power generation | |
| CN105262355B (en) | A kind of multiport inverter | |
| CN104883084B (en) | A kind of neutral point clamp type cascaded H-bridges mixed multi-level current transformer | |
| CN113078837B (en) | Clamping type three-level converter based on auxiliary bridge arm structure and control method | |
| CN102664549B (en) | Cascade inverter voltage balance and control method based on power device on-off distribution | |
| CN107612395A (en) | A kind of new double quasi- Z sources five-electrical level inverter |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |