CN204103797U - The T-shaped inverter of a kind of accurate Z source three level - Google Patents
The T-shaped inverter of a kind of accurate Z source three level Download PDFInfo
- Publication number
- CN204103797U CN204103797U CN201420400960.2U CN201420400960U CN204103797U CN 204103797 U CN204103797 U CN 204103797U CN 201420400960 U CN201420400960 U CN 201420400960U CN 204103797 U CN204103797 U CN 204103797U
- Authority
- CN
- China
- Prior art keywords
- source
- level
- accurate
- inverter
- brachium pontis
- 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.)
- Expired - Fee Related
Links
Abstract
The utility model relates to the T-shaped inverter of a kind of accurate Z source three level, and this topology has the identical boosting characteristic of accurate Z source network three level neutral-point-clamped (NPC) inverter, but switching device number used is less, and efficiency is higher.Compared with the T-shaped inverter of three level, topology of the present utility model can not only realize lifting/voltage reducing function, and allows upper and lower bridge arm direct pass, and reliability obviously increases, and the deadband eliminating time, prevents wave distortion; Compared with the three level diode clamp inverter of Z source, input current continuity and ripple is less, input need not bulky capacitor row group in parallel; Compared with the two-level inverter of accurate Z source, output voltage has midpoint potential, and therefore little with high-frequency harmonic, required filter is less, and switching frequency can reduce, and switching loss is less; It adopts the method for SVPWM to control inverter, adopts same the method to reduce on-off times, reduces switching loss, reduces harmonic wave of output voltage content.
Description
Technical field
The utility model relates to the T-shaped inverter of a kind of accurate Z source three level.
Background technology
Along with developing rapidly and continuous lifting to efficiency requirements of distributed power source, improve the quality of power supply, reduce harmonic pollution, improve the key issue that the efficiency of electricity generation system is distributed power source development.Three-level inverter has the advantages such as few, the withstand voltage height of harmonic wave, switch stress is little, electromagnetic interference (Electro Magnetic Interference, EMI) is few compared to traditional two-level inverter and is used widely at distributed power source and micro-capacitance sensor field.But be not constant for the output voltage of fuel cell, photovoltaic cell distributed power supply, the unsteady flow function of wider DC voltage range cannot be realized and obtain higher ac output voltage.In order to meet the wider voltage range of DC bus, researcher adds DC/DC converter, namely adopts two-layer configuration.But this converter not only needs more power device, also produce a large amount of switching losses in the course of the work, reduce system effectiveness.In order to reduce the switching loss that causes because of DC/DC converter to the impact of system effectiveness, the two-level inverter adopting Z source network is a kind of desirable selection.
Z source two-level inverter is widely used at new energy fields such as photovoltaic DC-to-AC converter, energy storage, electric automobile, fuel cells.But along with developing rapidly of distributed power source, improve the quality of power supply and power grade etc. and require to receive much concern.Z source multi-electrical level inverter can solve the problem.And Z source three level neutral-point-clamped (neutral point clamped, NPC) inverter is widely used in regenerative resources such as photovoltaic DC-to-AC converter, wind-driven generator, fuel cells, and by one, independently DC power supply, two DC side derided capacitors, a Z source network and a three level NPC inverter circuit form for it.The introducing of Z source network makes to lead directly to becomes a kind of normal operating state, and by controlling straight-through duty ratio, Z source three level NPC inverter can realize boost function, and without the controlling dead error time, prevents inversion wave distortion.Bridge arm direct pass can not cause the damage of power device, and reliability obviously increases.Therefore, Z source three level NPC inverter is with the obvious advantage relative to traditional three level NPC inverter, and prospect is very wide.
Although Z source three level diode clamp inverter has lifting/voltage reducing function, have the following disadvantages:
Z source network input discontinuous current, input needs bulky capacitor in parallel to carry out filtering; Capacitance voltage stress is larger.Although capacitance voltage stress is all comparatively large in all booster circuits, the electric capacity cost of two voltage levels is higher, and the series system cost between electric capacity and failure rate increase.Therefore, have continuous input current accurate Z source three level diode clamp inverter and carry out, due to the flat ripple effect of source of resistance network input inductance L 1, input current continuity and ripple is less, therefore input need not bulky capacitor row group in parallel.
But accurate Z source three level NPC inverter needs passive device too many, can produce a large amount of power losss, the efficiency of system can be caused so low.Efficiency and the quality of power supply are that guarantee regenerative resource and micro-capacitance sensor are reliable, stable, the guarantee of economical operation.
Therefore, the topological structure studying a kind of efficiency and quality of power supply optimum is most important.And for the T-shaped inverter of three level, efficiency and the quality of power supply relative to Z source three level NPC and Z source two-level inverter all better, but export non-constant for the output voltage of fuel cell, photovoltaic cell distributed power supply, cannot wide output voltage be realized, and cause harmonic wave very large due to the reason in dead band.
Utility model content
In order to solve the problem, the utility model proposes the T-shaped inverter of a kind of accurate Z source three level, the voltage stress of DC energy storage electric capacity C1 and C4 of the T-shaped inverter of accurate Z source three level declines clearly, decrease the series connection number of electric capacity, thus reduce hardware cost and failure rate widely, adopt SVPWM method, the method not only can realize the combination of on off state flexibly, also has and reduces switching loss and harmonic distortion is little, direct voltage utilance advantages of higher.
For achieving the above object, the utility model adopts following technical scheme:
The T-shaped inverter of the accurate Z source three level of one, comprises three-phase brachium pontis in parallel, and every phase brachium pontis comprises the IGBT pipe of two series connection, and the IGBT that the mid point side series connection both direction of each phase brachium pontis is different manages, and opposite side is connected with resistance through filter; Input voltage source is accessed after each brachium pontis input of parallel connection connects accurate Z source network; In accurate Z source, two electric capacity junctions connect one end of the both direction different I GBT pipe of each phase brachium pontis, and each IGBT pipe drives by control circuit.
Described accurate Z source network comprises four inductance and electric capacity, after voltage source positive pole connects an inductance series diode be connected a phase brachium pontis after inductance, be connected with an electric capacity between described brachium pontis and the input of diode; Voltage source negative pole to connect after inductance reversal connection diode and is connected another phase brachium pontis after inductance, is connected with an electric capacity between described brachium pontis and the input of diode; Be in series with two electric capacity between the output of two diodes, the connection mid point of two electric capacity connects third phase brachium pontis.
Described filter is LC filter circuit, and electric capacity common end grounding wherein.
Described control circuit comprises protective circuit, drive circuit, sampling modulate circuit; sampling modulate circuit connects DSP module; DSP module and protective circuit two-way communication, DSP module connects drive circuit, and in drive circuit output pwm signal driving brachium pontis, IGBT pipe opens and shutoff.
The three-phase voltage value size that the direct voltage of described sampling modulate circuit Gather and input voltage source, direct current, Z source network capacitance voltage and filter export.
The beneficial effects of the utility model are:
1, relative to the T-shaped inverter of three level, the T-shaped inverter of accurate Z source three level not only can realize boosting, and due to the straight-through damage that can not cause power device, reliability obviously increases, and the deadband eliminating time, prevents wave distortion;
2 compare with accurate Z source two-level inverter, and the Z source T-shaped inverter output voltage of three level has midpoint potential, therefore little with high-frequency harmonic, required filter is less, due to three level than two level closer to sine wave, therefore switching frequency can reduce, and switching loss is less;
3 compare with the Z source T-shaped inverter of three level, and the T-shaped inverter of accurate Z source three level is due to the flat ripple effect of source of resistance network input inductance L 1, and input current continuity and ripple is less, therefore input need not bulky capacitor row group in parallel.
4 compare with accurate Z source three level NPC inverter, and the T-shaped inverter of accurate Z source three level decreases component number, and conduction loss is lower, and efficiency is higher;
5, there is the advantages such as high power, waveform quality be good, extensive in field of renewable energy prospects such as photovoltaic generating system, wind generator system, fuel cells.
Accompanying drawing explanation
Fig. 1 is the utility model system construction drawing;
Fig. 2 (a) is accurate Z source three level T-shaped inverter Ua0=Vin/2 view under non-pass-through state;
Fig. 2 (b) is the T-shaped inverter of accurate Z source three level therefore Ua0=0 view under non-pass-through state;
Fig. 2 (c) is accurate Z source three level T-shaped inverter Ua0=-Vin/2 view under non-pass-through state;
Fig. 3 a Z source T-shaped inverter of three level that is as the criterion is in equivalent circuit diagram under non-pass-through state;
Fig. 3 b Z source T-shaped inverter of three level that is as the criterion is in equivalent circuit diagram under pass-through state;
Fig. 3 c Z source T-shaped inverter of three level that is as the criterion is in equivalent circuit diagram under lower pass-through state;
Fig. 3 d Z source T-shaped inverter of three level that is as the criterion is in complete straight-through lower state equivalent circuit diagram.
Fig. 4 a is as the criterion the three dimensional vector diagram of Z source three level;
Fig. 4 b three level changes into the service time figure of two level;
Fig. 5 adopts the modulator approach of SVPWM to realize the T-shaped inverter boosting of accurate Z source three level and inversion control;
Fig. 6 be as the criterion the Z source T-shaped inverter of three level in straight-through situation and the understanding and considerate condition of non-straight under operation waveform;
Fig. 7 (a) is the waveform of the lower straight-through time T0=0 of SVPWM control;
Fig. 7 (b) is the waveform of the lower straight-through time T0=0.1 of SVPWM control;
Fig. 8 (a) is as the criterion the T-shaped inverter of Z source three level and Z source three level NPC inverter at non-straight-through operation waveform;
Fig. 8 (b) is as the criterion the T-shaped inverter of Z source three level and the operation waveform of Z source three level NPC inverter in upper and lower straight-through situation;
Fig. 9 is as the criterion Z source three level NPC inverter structure chart;
Figure 10 is as the criterion the control circuit figure of the T-shaped inverter of Z source three level.
Embodiment
Below in conjunction with accompanying drawing and embodiment, the utility model is described further.
As shown in Figure 1, the T-shaped inverter of a kind of accurate Z source three level, comprises three-phase brachium pontis in parallel, and every phase brachium pontis comprises the IGBT pipe of two series connection, and the IGBT that the mid point side series connection both direction of each phase brachium pontis is different manages, and opposite side is connected with resistance through filter; Input voltage source is accessed after each brachium pontis input of parallel connection connects accurate Z source network; In accurate Z source, two electric capacity junctions connect one end of the both direction different I GBT pipe of each phase brachium pontis, and each IGBT pipe drives by control circuit.
Described accurate Z source network comprises four inductance and electric capacity, after voltage source positive pole connects an inductance series diode be connected a phase brachium pontis after inductance, be connected with an electric capacity between described brachium pontis and the input of diode; Voltage source negative pole to connect after inductance reversal connection diode and is connected another phase brachium pontis after inductance, is connected with an electric capacity between described brachium pontis and the input of diode; Be in series with two electric capacity between the output of two diodes, the connection mid point of two electric capacity connects third phase brachium pontis.
Described filter is LC filter circuit, and electric capacity common end grounding wherein.
Described control circuit comprises protective circuit, drive circuit, sampling modulate circuit; sampling modulate circuit connects DSP module; DSP module and protective circuit two-way communication, DSP module connects drive circuit, and in drive circuit output pwm signal driving brachium pontis, IGBT pipe opens and shutoff.
The three-phase voltage value size that the direct voltage of described sampling modulate circuit Gather and input voltage source, direct current, Z source network capacitance voltage and filter export.System output is connected with load.
For the T-shaped inverter of accurate Z source three level, adopt the method for SPWM, final output voltage can be made to comprise a large amount of harmonic waves, affect the waveform quality of output voltage.And adopt the mode control PWM of SVPWM output can improve voltage waveform quality and improve direct voltage utilance.Therefore the utility model adopts the method for SVPWM to realize aiming at the control of the T-shaped inverter of Z source three level.
The coherent signal that Hall element records by signal conditioning circuit is nursed one's health, and obtains the analog signal that sample circuit can receive.The sampling of AD converter is controlled by DSP with conversion, and conditioned analog signal is converted to digital quantity.The process of digital signal and SVPWM control, PWM produces and realizes by DSP, and the final pwm signal generated is given drive circuit and gone opening and shutoff of control IGBT pipe.
Fig. 2 (a)-(c) is as the criterion the T-shaped inverter of Z source three level under the understanding and considerate condition of non-straight, Converting Unit structure and circuit theory diagrams.Concrete control mode is as follows:
Modulating wave is three-phase sine-wave, namely
u
a＝sinωt
u
b＝sin(ωt-120°)
u
c＝sin(ωt-240°)；
Carrier wave is the triangular wave of difference 180 ° in phase place.
For a phase, effluent is for just to the right to suppose electric current, and on off sequence generating mode is as follows:
If Ua>CA1 and Ua>CA2, then on off sequence (Ua1, Ua2, Ua3, Ua4)=(1,1,0,0)=P.From Fig. 2 (a), as i>0, when Ua1 opens, although Ua2 is open-minded, do not have electric current to flow through Ua2, Ua3, Ua4 turn off.As i<0, Ua1, Ua2, Ua3, Ua4 turn off.Now Ua0=Vin/2.
If Ua<CA1 and Ua<CA2, then on off sequence (Ua1, Ua2, Ua3, Ua4)=(0,0,1,1)=N.From Fig. 2 (c), as i<0, when Ua4 opens, although Ua3 is open-minded, do not have electric current to flow through Ua3, Ua, 1, Ua2 turns off.As i>0, Ua1, Ua2, Ua3, Ua4 turn off.Therefore Ua0=-Vin/2.
If Ua<CA1 and Ua>CA2, then on off sequence (Ua1, Ua2, Ua3, Ua4)=(0,1,1,0)=O.From Fig. 2 (b), as i>0, Ua2 is open-minded, and Ua1, Ua3, Ua4 turn off.Therefore Ua0=0.
If Ua<CA1 and Ua>CA2, then on off sequence (Ua1, Ua2, Ua3, Ua4)=(0,1,1,0)=O.From Fig. 2 (b), as i<0, Ua3 is open-minded, and Ua1, Ua2, Ua4 turn off.Therefore Ua0=0.
Fig. 3 a Z source T-shaped inverter of three level that is as the criterion is in equivalent circuit diagram under non-pass-through state; Fig. 3 b Z source T-shaped inverter of three level that is as the criterion is in equivalent circuit diagram under pass-through state; Fig. 3 c Z source T-shaped inverter of three level that is as the criterion is in equivalent circuit diagram under lower pass-through state; Fig. 3 d Z source T-shaped inverter of three level that is as the criterion is in complete straight-through lower state equivalent circuit diagram.Known by the derivation of equation, as sensitizing factor B=1, the Z source T-shaped inverter of three level is operated in conventional buck pattern; As sensitizing factor B>1, be then operated in boost mode.
Fig. 4 a is as the criterion the three dimensional vector diagram of Z source three level, is decomposed into 6 little hexagons.Fig. 4 b is after three-phase reference voltage is revised, and three level is changed into the SVPWM polar plot I of two level.
Fig. 5 is switching waveform, the switching over moment of three level and the identical of two level in the one-period that obtains of SVPWM method.Therefore upper and lower leading directly to can be added in equivalent zero vector.
Fig. 6 is upper and lower straight-through method for implanting; For the T-shaped inverter of accurate Z source three level, the injection of pass-through state can not have an impact to the output voltage of brachium pontis, controls for SVPWM, { O, O, O} state can not produce complete straight-through, therefore only have upper straight-through and lower straight-through, and upper and lower leading directly to can only produce in equivalent zero vector.Wherein, { O, O, O} state refers to that the IGBT pipe of three-phase brachium pontis in parallel is all in { O} state.{ O} state is that the Continuity signal of four IGBT pipes of this phase brachium pontis is respectively (0,1,1,0); { N} state is that the Continuity signal of four IGBT pipes of this phase brachium pontis is respectively (0,0,1,1); { P} state is that the Continuity signal of four IGBT pipes of this phase brachium pontis is respectively (1,1,0,0).
Upper straight-through can only to occur in O}, in the action time of the equipollent vectors of N} state, straight-throughly can only to occur in down O}, { in the action time of P} state equipollent vectors.The minimum brachium pontis of selector switch State Transferring produces straight-through, at any time, to the Tmax of service time, i.e. T
u, T
v, T
win maximum, increase T
0upper straight-through, simultaneously to the Tmax of service time, the minimum value namely in TU, TV, TW, reduces T
0lower straight-through, keep the Tmid of modulation signal, i.e. T
u, T
v, T
win median constant.Obtain the straight-through duty ratio required for the T-shaped inverter of Z source three level, finally the pwm signal obtained is delivered to drive circuit.
Fig. 7 (a) is the waveform of the lower straight-through time T0=0 of SVPWM control, and Fig. 7 (b) is that SVPWM controls the lower waveform leading directly to time T0=0.1.During straight-through time T0=0, setting modulation degree M is 0.8.What export successively in figure is phase voltage, phase current, line voltage, Vdc voltage, accurate Z source network intermediate capacitance voltage.The T-shaped inverter of accurate Z source three level does not boost, and therefore the peak value of line voltage equals 200V.During straight-through time T0=0.1, by the known sensitizing factor B=1.25 of formula, therefore theoretical phase voltage value is 160*1.25/1.732=115V, and actual measured value is 114V.Can obtain theoretical boost value Vdc by formula is 250V, and actual measured value is 249V.Electric current is not subject to the impact of through connect signal and distorts.The capacitance voltage of accurate Z source network can obtain 112V by correlation formula, and actual measured value is 111V.Vdc voltage realizes boosting and invert function in 125V to 250V change in addition.Simulation result shows that the T-shaped inverter of accurate Z source three level can make line voltage be raised to the value of setting and not affect the waveform quality of output current.
Be as the criterion Z source three level NPC inverter and the T-shaped inverter of accurate Z source three level of Fig. 8 (a), Fig. 8 (b) adopts SVPWM method to carry out simulation comparison.As can be seen from figure, table 1, the T-shaped inverter of accurate Z source three level and accurate Z source three level NPC inverter are under identical modulation strategy, and harmonic wave is little, and waveform quality is suitable.
Under table 1PD modulation strategy, harmonic ratio comparatively
Fig. 9 is as the criterion the structure chart of Z source three level NPC.
Figure 10 is as the criterion the control circuit figure of the T-shaped inverter in Z source; Control circuit comprises protective circuit, drive circuit and sampling modulate circuit, sampling modulate circuit comprises three-phase voltage U a that direct voltage Vin, Z source capacitance voltage Vzc, direct current Idc and filter export, Ub, Uc, and signal conditioning circuit and control voltage had/under-voltage protection and overcurrent protection; In drive circuit output pwm signal driving brachium pontis, IGBT pipe opens and shutoff.
Therefore, adopt SVPWM modulation strategy can realize boosting and the invert function of the T-shaped inverter of accurate Z source three level, and relative to accurate Z source three level NPC inverter, conduction loss is lower, and efficiency is high, and waveform quality is suitable.This topological inverter has a extensive future in field of renewable energy such as photovoltaic generating system, wind generator system, fuel cells.
By reference to the accompanying drawings embodiment of the present utility model is described although above-mentioned; but the restriction not to the utility model protection range; one of ordinary skill in the art should be understood that; on the basis of the technical solution of the utility model, those skilled in the art do not need to pay various amendment or distortion that creative work can make still within protection range of the present utility model.
Claims (5)
1. the T-shaped inverter of accurate Z source three level, is characterized in that: comprise three-phase brachium pontis in parallel, and every phase brachium pontis comprises the IGBT pipe of two series connection, and the IGBT that the mid point side series connection both direction of each phase brachium pontis is different manages, and opposite side is connected with resistance through filter; Input voltage source is accessed after each brachium pontis input of parallel connection connects accurate Z source network; In accurate Z source, two electric capacity junctions connect one end of the both direction different I GBT pipe of each phase brachium pontis, and each IGBT pipe drives by control circuit.
2. the T-shaped inverter of a kind of accurate Z source three level as claimed in claim 1, it is characterized in that: described accurate Z source network comprises four inductance and electric capacity, after voltage source positive pole connects an inductance series diode be connected a phase brachium pontis after inductance, be connected with an electric capacity between described brachium pontis and the input of diode; Voltage source negative pole to connect after inductance reversal connection diode and is connected another phase brachium pontis after inductance, is connected with an electric capacity between described brachium pontis and the input of diode; Be in series with two electric capacity between the output of two diodes, the connection mid point of two electric capacity connects third phase brachium pontis.
3. the T-shaped inverter of a kind of accurate Z source three level as claimed in claim 1, is characterized in that: described filter is LC filter circuit, and electric capacity common end grounding wherein.
4. the T-shaped inverter of a kind of accurate Z source three level as claimed in claim 1; it is characterized in that: described control circuit comprises protective circuit, drive circuit, sampling modulate circuit; sampling modulate circuit connects DSP module; DSP module and protective circuit two-way communication; DSP module connects drive circuit, and in drive circuit output pwm signal driving brachium pontis, IGBT pipe opens and shutoff.
5. the T-shaped inverter of a kind of accurate Z source three level as claimed in claim 4, is characterized in that: the three-phase voltage value size that the direct voltage of described sampling modulate circuit Gather and input voltage source, direct current, Z source network capacitance voltage and filter export.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420400960.2U CN204103797U (en) | 2014-07-18 | 2014-07-18 | The T-shaped inverter of a kind of accurate Z source three level |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420400960.2U CN204103797U (en) | 2014-07-18 | 2014-07-18 | The T-shaped inverter of a kind of accurate Z source three level |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN204103797U true CN204103797U (en) | 2015-01-14 |
Family
ID=52272197
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420400960.2U Expired - Fee Related CN204103797U (en) | 2014-07-18 | 2014-07-18 | The T-shaped inverter of a kind of accurate Z source three level |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN204103797U (en) |
Cited By (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104092399A (en) * | 2014-07-18 | 2014-10-08 | 山东大学 | Standard Z source three-level T-shaped inverter and SVPWM method thereof |
| CN104578882A (en) * | 2015-01-28 | 2015-04-29 | 厦门大学 | Voltage type Tran-z-source miniature inverter |
| CN104716855A (en) * | 2015-04-09 | 2015-06-17 | 山东科技大学 | Current-type quasi-impedance source inverter with two-way power flow |
| CN105529948A (en) * | 2016-01-29 | 2016-04-27 | 南京航空航天大学 | Double-input three-phase inverter |
| CN105790271A (en) * | 2016-04-12 | 2016-07-20 | 国网江苏省电力公司扬州供电公司 | Active power electric filter circuit based on three-phase bridge inversion circuit and work method thereof |
| CN106451665A (en) * | 2016-11-18 | 2017-02-22 | 四川创汇智能电力科技有限公司 | Tire-type gantry crane power system based on power battery energy supply |
| CN107466434A (en) * | 2015-01-26 | 2017-12-12 | 威尔蒂夫有限公司 | Uninterrupted power source is controlled to remove the method for short circuit load |
| CN107612349A (en) * | 2017-09-30 | 2018-01-19 | 华南理工大学 | The common ground type isolation quasi- Z source converters of high-gain of fuel cell and photovoltaic generation |
| CN109756140A (en) * | 2019-01-17 | 2019-05-14 | 哈尔滨工业大学 | A kind of Y source inventer with raising step-up ratio |
| CN110771000A (en) * | 2017-06-15 | 2020-02-07 | 多伦多大学管理委员会 | Constant current fast charging of electric vehicles via a DC grid with dual inverter drive |
| CN112511015A (en) * | 2020-12-07 | 2021-03-16 | 东北电力大学 | Three-phase double-Trans-quasi-Z-source network three-level indirect matrix converter topological structure |
| CN113644631A (en) * | 2021-09-17 | 2021-11-12 | 锦浪科技股份有限公司 | Processing method for half bus short circuit |
| CN115811243A (en) * | 2022-12-02 | 2023-03-17 | 江苏科曜能源科技有限公司 | T-shaped three-phase three-level four-bridge-arm quasi-Z-source inverter device |
-
2014
- 2014-07-18 CN CN201420400960.2U patent/CN204103797U/en not_active Expired - Fee Related
Cited By (18)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104092399A (en) * | 2014-07-18 | 2014-10-08 | 山东大学 | Standard Z source three-level T-shaped inverter and SVPWM method thereof |
| CN107466434B (en) * | 2015-01-26 | 2021-03-12 | 威尔蒂夫有限公司 | Method for controlling UPS to eliminate short circuit load |
| CN107466434A (en) * | 2015-01-26 | 2017-12-12 | 威尔蒂夫有限公司 | Uninterrupted power source is controlled to remove the method for short circuit load |
| CN104578882A (en) * | 2015-01-28 | 2015-04-29 | 厦门大学 | Voltage type Tran-z-source miniature inverter |
| CN104578882B (en) * | 2015-01-28 | 2017-05-24 | 厦门大学 | Voltage type Tran-z-source miniature inverter |
| CN104716855A (en) * | 2015-04-09 | 2015-06-17 | 山东科技大学 | Current-type quasi-impedance source inverter with two-way power flow |
| CN105529948B (en) * | 2016-01-29 | 2019-02-26 | 南京航空航天大学 | Dual input three-phase inverter |
| CN105529948A (en) * | 2016-01-29 | 2016-04-27 | 南京航空航天大学 | Double-input three-phase inverter |
| CN105790271A (en) * | 2016-04-12 | 2016-07-20 | 国网江苏省电力公司扬州供电公司 | Active power electric filter circuit based on three-phase bridge inversion circuit and work method thereof |
| CN106451665A (en) * | 2016-11-18 | 2017-02-22 | 四川创汇智能电力科技有限公司 | Tire-type gantry crane power system based on power battery energy supply |
| CN110771000A (en) * | 2017-06-15 | 2020-02-07 | 多伦多大学管理委员会 | Constant current fast charging of electric vehicles via a DC grid with dual inverter drive |
| CN110771000B (en) * | 2017-06-15 | 2024-03-12 | 多伦多大学管理委员会 | Constant current fast charge of electric vehicles via DC grid drive with dual inverter |
| CN107612349A (en) * | 2017-09-30 | 2018-01-19 | 华南理工大学 | The common ground type isolation quasi- Z source converters of high-gain of fuel cell and photovoltaic generation |
| CN109756140A (en) * | 2019-01-17 | 2019-05-14 | 哈尔滨工业大学 | A kind of Y source inventer with raising step-up ratio |
| CN112511015A (en) * | 2020-12-07 | 2021-03-16 | 东北电力大学 | Three-phase double-Trans-quasi-Z-source network three-level indirect matrix converter topological structure |
| CN112511015B (en) * | 2020-12-07 | 2022-09-20 | 东北电力大学 | Three-phase double-Trans-quasi-Z-source network three-level indirect matrix converter topological structure |
| CN113644631A (en) * | 2021-09-17 | 2021-11-12 | 锦浪科技股份有限公司 | Processing method for half bus short circuit |
| CN115811243A (en) * | 2022-12-02 | 2023-03-17 | 江苏科曜能源科技有限公司 | T-shaped three-phase three-level four-bridge-arm quasi-Z-source inverter device |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN204103797U (en) | The T-shaped inverter of a kind of accurate Z source three level | |
| CN104092399A (en) | Standard Z source three-level T-shaped inverter and SVPWM method thereof | |
| CN102709941B (en) | Control method of quasi-Z source cascade multi-level single-phase photovoltaic grid generation system | |
| CN101345423B (en) | 5-power level H-bridge cascade connection back-to-back current transformer used for wind power generation system | |
| CN104092400A (en) | Z-source three-level T-type inverter and modulating method thereof | |
| CN103779874B (en) | The non-isolated grid-connected electricity generation system of single-stage boost inverter and control method thereof | |
| CN103326606B (en) | A kind of one-phase five-level inverter | |
| CN104158211B (en) | Based on many power grids system control method of Modular multilevel converter | |
| WO2017197629A1 (en) | Current source inverter system and inverter device | |
| CN104167947B (en) | Z-source three-level T-type inverter and neutral-point balance control method thereof | |
| CN103036397B (en) | Single-level single-phase large-step-up-ratio cascade connection voltage type convertor of quasi impedance source | |
| CN105162350A (en) | High-efficiency wide-load-range three-phase micro-inverter and control method thereof | |
| CN110138250A (en) | A kind of switching capacity N electrical level inverter and its modulator approach | |
| CN110323959A (en) | It can inhibit the single-phase inverter and its control method of secondary ripple wave and common mode leakage current | |
| CN107134937A (en) | A kind of three level multiple-pulses output transformerless inverter circuit | |
| CN205195587U (en) | Grid -connected PV converter, photovoltaic power supply system and electrical apparatus | |
| CN104811071A (en) | Photovoltaic inverter and passive decoupling restraining method based on non-isolated LCL filtering | |
| CN204031005U (en) | The T-shaped inverter of a kind of Z source three level | |
| CN104767365A (en) | T type three-level DC/AC converter direct voltage ripple compensation system and method | |
| CN108631326A (en) | Idle and harmonic compensation device based on Buck type three-level AC AC-AC converters | |
| CN103312210A (en) | Three-phase four-wire type three-level photovoltaic grid-connected inverter | |
| CN107645246A (en) | A kind of two-stage type single-phase inverter | |
| CN105337520A (en) | Photovoltaic grid-connected converter, photovoltaic power supply system and electric appliance | |
| CN103036398B (en) | Single-level single-phase large-step-up-ratio cascade connection voltage type convertor of quasi impedance source | |
| CN207743895U (en) | A kind of two-stage type single-phase inverter |
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: 20150114 Termination date: 20150718 |
|
| EXPY | Termination of patent right or utility model |