CN114629368A - Nine level dc-to-ac converter of switched capacitor high gain - Google Patents

Nine level dc-to-ac converter of switched capacitor high gain Download PDF

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CN114629368A
CN114629368A CN202210240037.6A CN202210240037A CN114629368A CN 114629368 A CN114629368 A CN 114629368A CN 202210240037 A CN202210240037 A CN 202210240037A CN 114629368 A CN114629368 A CN 114629368A
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switching tube
capacitor
diode
drain electrode
abs
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CN114629368B (en
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徐能谋
周国华
彭璠
刘卜源
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Southwest Jiaotong University
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Southwest Jiaotong University
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    • 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
    • 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
    • H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • 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
    • H02M1/08—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters
    • H02M1/088—Circuits specially adapted for the generation of control voltages for semiconductor devices incorporated in static converters for the simultaneous control of series or parallel connected semiconductor devices
    • 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
    • H02J2300/00—Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20—The dispersed energy generation being of renewable origin

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)

Abstract

A nine-level inverter with high gain of switched capacitor, DC voltage source VinIs connected to the diode D1Anode and switching tube S1Drain electrode of (V)inIs connected to the switching tube S2Source electrode and switch tube S4Source and diode D3A cathode of (a); capacitor C1Is connected to D1Cathode of (2), diode D2Anode and switching tube S3Drain electrode of, C1Is connected to S1Source and S of2A drain electrode of (1); capacitor C2Is connected to D2Cathode and switching tube S6Drain electrode of (2) and switching tube S8Drain electrode of, C2Is connected to S3Source electrode of (1) and switching tube S5A drain electrode of (1); capacitor C3Is connected to a positive electrode ofPolar tube D4And S4Drain electrode of, C3Is connected to D3Anode and switching tube S7Source electrode of (1) and switching tube S9A source electrode of (a); s. the5Is connected to D4The anode of (1); s6Is connected to S7And the positive pole of the load, S8Is connected to S9And the negative pole of the load. The four-time boosting capacity is achieved, the number of devices is small, the power density is high, and the system efficiency is high.

Description

Nine level dc-to-ac converter of switched capacitor high gain
Technical Field
The invention belongs to the technical field of power electronics, and particularly relates to a switched capacitor high-gain nine-level inverter.
Background
The renewable energy has the advantages of wide distribution, safety, reliability, abundant reserves, convenience for development and the like. In a renewable energy power generation system, a power electronic inverter is a key link of electric energy conversion and transmission, and has important influence on the aspects of working performance, conversion efficiency, reliability and the like of the whole system. The multilevel inverter has the advantages of low harmonic content of output voltage, high quality of output electric energy, low voltage stress of a switching device, small requirement on an output filter and the like, and has important application prospect in a renewable energy power generation system. Conventional multi-level inverters include diode-clamped, flying capacitor, and cascaded H-bridge inverter architectures. The diode clamping type inverter and the flying capacitor type inverter respectively use a large number of clamping diodes and flying capacitors to generate multi-level output, but the structure is complex and the control difficulty is high. The cascaded H-bridge inverter performs multi-level output by cascading a plurality of H-bridge units, but the system cost and the occupied area are increased due to more power devices of the cascaded H-bridge inverter, more direct-current power supplies are needed, and the application range of the cascaded H-bridge inverter is limited.
In recent years, switched capacitor technology has been widely used in multilevel inverters. The switch capacitor structure has no magnetic elements such as inductors and transformers, and has the advantages of small volume, high power density, high conversion efficiency, easy integration and the like. Meanwhile, the structure has certain boosting capacity, intermediate DC/DC boosting links are reduced, the cost of the system can be reduced, and the efficiency of the inverter is improved. The switched capacitor structure is applied to the multi-level inverter, and has important significance for improving the voltage regulation capability of the multi-level inverter, widening the application range of the inverter and realizing the miniaturization, integration and high-efficiency development of the inverter. However, the conventional switched capacitor nine-level inverter generally has the problems of low voltage gain, large number of devices, large capacitor size and the like.
Disclosure of Invention
The invention provides a switched capacitor high-gain nine-level inverter aiming at the problems. The output voltage of the inverter is four times of the voltage of a direct-current voltage source, and the high-voltage gain is realized; the number of the used switching tubes is small, the capacitors can realize the charge and discharge balance of the capacitor voltage in a switching period, and the cost and the volume of the inverter are reduced.
The technical scheme for realizing the purpose of the invention is as follows:
a first circuit: DC voltage source VinIs connected to the diode D1Anode and switching tube S1Drain electrode of (V)inIs connected to the switching tube S2Source electrode and switch tube S4Source and diode D3A cathode of (a); capacitor C1Is connected to D1Cathode of (2), diode D2Anode and switching tube S3Drain electrode of, C1Is connected to S1Source and S of2A drain electrode of (1); capacitor C2Is connected to D2Cathode and switching tube S6Drain electrode of (1) and switching tube S8Drain electrode of, C2Is connected to S3Source electrode of (2) and switching tube S5A drain electrode of (1); capacitor C3Is connected to the diode D4And S4Drain electrode of, C3Is connected to D3Anode and switching tube S7Source electrode of (1) and switching tube S9A source electrode of (a); s5Is connected to D4The anode of (1); s6Is connected to S7And the positive pole of the load, S8Is connected to S9And the negative pole of the load.
A second circuit: DC voltage source VinIs connected to the cathode of the diode D1Cathode and switching tube S1Source electrode of, VinIs connected to the switching tube S2Drain electrode of (2), and switching tube S3And diode D2The anode of (1); capacitor C1Is connected to D1Anode of (2), diode D3Cathode and switching tube S4Source electrode of, C1Is connected to S1And S2A source electrode of (a); capacitor C2Is connected to D2Cathode and switching tube S6Drain electrode of (1) and switching tube S8Drain electrode of, C2Is connected to S3Source electrode of (1) and switching tube S5A drain electrode of (1); capacitor C3Is connected to the diode D4And S4Drain electrode of, C3Is connected to D3Anode and switching tube S7Source electrode of (1) and switching tube S9A source electrode of (a); s5Is connected to D4The anode of (1); s6Is connected to S7And the positive pole of the load, S8Is connected to S9And the negative pole of the load.
The control method of the circuit comprises the following steps: using sine waves usTriangular wave u1、u2、u3、u4Generating driving signals S1-S9 to control the switch tube S respectively1-S9(ii) a Wherein u is1、u2、u3、u4Has a frequency greater than usThe frequency of (d); u. of1And u2Equal frequency, 90 ° phase difference; u. of3And u4Equal frequency and 180 degrees phase difference; u. of1And u2Has a frequency of u3And u4Twice the frequency of (c); u. u1Is 0 to Ac，u2Size of Ac～2Ac，u3And u4Has a size of 2Ac～4Ac，usThe amplitude is less than 4 Ac; the method specifically comprises the following steps:
generating an intermediate signal A1-A10Wherein: a. the1＝(us>0)，A2＝not(us>0)，A3＝(abs(us)>u1)，A4＝(abs(us)>u2)，A5＝(abs(us)>u3)，A6＝not(abs(us)>u3)，A7＝(abs(us)>u4)，A8＝not(abs(us)>u4)，A9＝(abs(us)>3Ac)，A10＝not(abs(us)>3Ac)；
Generating an intermediate signal B1-B5Wherein: b is1＝(A3)xor(A4)，B2＝(A5)and(A7)，B3＝((A5)or(A7))xor(A4)，B4＝((A6)and(A9))or((A7)and(A10))，B5＝((A5)and(A10))or((A8)and(A9))；
Generating drive signals s1-s9, wherein: s1 ═ B2)or(B3)or(B5)，s2＝(B1)or(B4)，s3＝(B2)or(B4)，s4＝B5，s5＝(B4)or(B5)，s6＝not((A2)and(A3))，s7＝(A2)and(A3)，s8＝not((A1)and(A3))，s9＝(A1)and(A3)。
Compared with the prior art, the invention has the beneficial effects that:
1. the invention is a boost inverter, which has four times of boost capability.
2. The device has the advantages of small quantity, simple structure, low cost, high power density and high system efficiency.
3. All capacitors can realize the charge and discharge balance of capacitor voltage under the switching period, and the cost and the volume of the switched capacitor are reduced.
Drawings
Fig. 1 is a schematic diagram of a first switched capacitor high-gain nine-level inverter.
Fig. 2 is a schematic diagram of a second switched capacitor high-gain nine-level inverter.
Fig. 3(a), 3(b), and 3(c) are modulation signal diagrams.
Fig. 3(d) is a logic diagram for generating the switching tube driving signal.
Fig. 4(a) -4 (k) are diagrams of operation modes of the first switched capacitor high-gain nine-level inverter.
Fig. 5 shows waveforms of output voltage, output current and capacitance voltage of a first switched-capacitor high-gain nine-level inverter.
Fig. 6 shows waveforms of output voltage and output current of the first switched capacitor high-gain nine-level inverter during load variation.
Detailed Description
The following further describes embodiments of the present invention with reference to the drawings.
As shown in FIG. 1, a circuit schematic diagram of a first switched capacitor high-gain nine-level inverter includes a DC voltage source VinA first capacitor C1A second capacitor C2A third capacitor C3A first diode D1A second diode D2A third diode D3A fourth diode D4A first switch S1A second switch S2And a third switch S3And a fourth switch S4The fifth switch S5And a sixth switch S6Seventh switch S7The eighth switch S8And a ninth switch S9And a load.
DC voltage source VinAnode and first diode D1And the first switch S1Is connected with the drain electrode of the transistor; DC voltage source VinAnd the second switch S2Source electrode, fourth switch S4Source electrode of and third diode D3The cathode of (a) is connected; a first capacitor C1Anode and first diode D1Cathode of (2), second diode D2Anode and third switch S3Is connected with the drain electrode of the transistor; a first capacitor C1And the first switch S1Source electrode and second switch S2Is connected with the drain electrode of the transistor; second capacitor C2Anode and second diode D2Cathode of (2), sixth switch S6Drain electrode of (1) and eighth switch S8Is connected with the drain electrode of the transistor; second capacitor C2Negative pole and third switch S3Source electrode of, fifth switch S5Drain electrode ofConnecting; third capacitor C3Anode and fourth diode D4Cathode, fourth switch S4Is connected with the drain electrode of the transistor; third capacitor C3Negative pole of and a third diode D3Anode of (2), seventh switch S7Source electrode and ninth switch S9Is connected to the source of (a); fifth switch S5Source and fourth diode D4The anode of (2) is connected; sixth switch S6Source and seventh switch S7The drain of (3) is connected with the anode of the load; eighth switch S8Source and ninth switch S9Is connected to the negative pole of the load.
As shown in FIG. 2, a circuit schematic diagram of a second switched capacitor high-gain nine-level inverter includes a DC voltage source VinA first capacitor C1A second capacitor C2A third capacitor C3A first diode D1A second diode D2A third diode D3A fourth diode D4A first switch S1A second switch S2And a third switch S3And a fourth switch S4The fifth switch S5And a sixth switch S6Seventh switch S7The eighth switch S8And a ninth switch S9And a load.
DC voltage source VinAnode and second diode D2Anode of (2), second switch S2And the third switch S3Is connected with the drain electrode of the transistor; DC voltage source VinNegative pole of (2) and first switch S1Source electrode of and first diode D1The cathode of (a) is connected; first diode D1Anode and first capacitor C1Negative pole, fourth switch S4Source electrode of and third diode D3The cathode of (a) is connected; first switch S1Drain electrode of and the first capacitor C1Positive pole and second switch S2Is connected to the source of (a); second capacitor C2Anode and second diode D2Cathode of (2), sixth switch S6Drain electrode of (1) and eighth switch S8Is connected with the drain electrode of the transistor; second capacitor C2Negative pole and third switch S3Source electrode of, fifth switch S5OfConnecting the poles; third capacitor C3Anode and fourth diode D4Cathode, fourth switch S4Is connected with the drain electrode of the transistor; third capacitor C3Negative pole of and a third diode D3Anode of (2), seventh switch S7Source electrode and ninth switch S9Is connected to the source of (a); fifth switch S5Source electrode of and fourth diode D4The anode of (2) is connected; sixth switch S6Source and seventh switch S7The drain of (3) is connected with the anode of the load; eighth switch S8Source and ninth switch S9Is connected to the negative electrode of the load.
Fig. 3(a), fig. 3(b) and fig. 3(c) show modulation signals of the two kinds of switched capacitor high-gain nine-level inverters. In the figure, usIs a sine wave, u1、u2、u3、u4Is a triangular wave. As shown in FIGS. 3(a) and 3(b), u1、u2、u3、u4Has a frequency greater than usThe frequency of (d); u. of1And u2Equal frequency, 90 ° phase difference; u. of3And u4Equal frequency, 180 degrees phase difference; u. of1And u2Has a frequency of u3And u4Twice the frequency of (c); u. u1Is 0 to Ac，u2Has a size of Ac～2Ac，u3And u4Has a size of 2Ac～4Ac，usThe amplitude is less than 4 Ac.
Fig. 3(d) is a logic diagram for generating a switching tube driving signal using sine waves and triangular waves. As shown, the sine wave and the triangular wave signals are logically operated to generate an intermediate signal A1-A10，A1-A10Regenerating an intermediate signal B1-B5The intermediate signals are then logically operated to obtain switching tube driving signals s1-s 9.
The two inverters can obtain the following results under the control of the switching tube driving signal generated in fig. 3 (d): a first capacitor C1Is the voltage of a DC voltage source, a second capacitor C2Is twice the voltage of the DC voltage source, and a third capacitor C3Is the voltage of the dc voltage source.
If the switch tube driving signals s3 and s4 are replaced by s 3-B respectively5，s4＝(B2)or(B4) Then, we can get: a first capacitor C1Is the voltage of a DC voltage source, a second capacitor C2Is the voltage of the DC voltage source, and a third capacitor C3Is twice the voltage of the dc voltage source.
A first capacitor C1A second capacitor C2And a third capacitance C3The charging and discharging balance of the capacitor voltage can be realized under the switching period; the amplitude of the output voltage of the inverter is four times the voltage of the direct-current voltage source.
Next, the operation state after the switching tube is controlled by the driving signal generated in fig. 3(d) will be described by taking the first nine-level inverter with high gain of the switched capacitor as an example.
The inverter has 11 operating states in one output voltage period.
1)voWhen the ratio is 0: as shown in FIG. 4(a), the switching tube S6、S8Conducting, and switching off the other switching tubes; diode D1The forward direction is conducted, and the rest diodes are cut off. The inverter output voltage is zero.
2)vo＝+Vin: as shown in fig. 4(b), the switching tube S2、S6、S9Conducting, and turning off the other switching tubes; diode D1、D2、D3Forward conducting, diode D4Cutting off; capacitor C1Is charged in parallel with a DC voltage source to VinWhile a DC voltage source is passed through D1、D2、S6、S9、D3Directly to the load. The output voltage of the inverter is + Vin。
3)vo＝+2Vin: as shown in FIG. 4(c), the switching tube S1、S6、S9Conducting, and switching off the other switching tubes; diode D2、D3Forward conducting, diode D1、D4Cutting off; at this time, the capacitance C1In series with a DC voltage source, through S1、D2、S6、S9、D3Power is supplied to the load. The output voltage of the inverter is +2Vin。
4)vo＝+3Vin: as shown in fig. 4(d), the switching tube S2、S3、S5、S6、S9Conducting, and turning off the other switching tubes; diode D1、D3、D4Forward conducting, diode D2By capacitor C2Reverse cut-off; capacitor C1、C3Is charged in parallel with a DC voltage source to VinWhile, at the same time, a capacitance C2In series with a DC voltage source, through D1、S3、S6、S9、D3Power is supplied to the load. The output voltage of the inverter is +3Vin。
5)vo＝+3Vin: as shown in fig. 4(e), the switching tube S1、S4、S5、S6、S9Conducting, and turning off the other switching tubes; diode D2、D4Forward conducting, diode D1、D3Are respectively covered by a capacitor C1、C3Reverse cut-off; capacitor C1Connected in series with a DC voltage source to a capacitor C2Charging, and simultaneously, the capacitor C1、C3In series with a DC voltage source, through S1、D2、S6、S9、S4Power is supplied to the load. The output voltage of the inverter is +3Vin。
6)vo＝+4Vin: as shown in fig. 4(f), the switching tube S1、S3、S6、S9Conducting, and turning off the other switching tubes; diode D3Conducting in the forward direction, and stopping the rest diodes; capacitor C1、C2In series with a DC voltage source, through S1、S3、S6、S9、D3Power is supplied to the load. The output voltage of the inverter is +4Vin。
7)vo＝-Vin: as shown in FIG. 4(g), the switching tube S2、S7、S8Conducting, and turning off the other switching tubes; IIPolar tube D1、D2、D3Forward conducting, diode D4Cutting off; capacitor C1Charged in parallel with a DC voltage source to VinWhile a DC voltage source is passed through D1、D2、S7、S8、D3Directly to the load. The output voltage of the inverter is-Vin。
8)vo＝-2Vin: as shown in fig. 4(h), the switching tube S1、S7、S8Conducting, and turning off the other switching tubes; diode D2、D3Forward conducting, diode D1、D4Cutting off; at this time, the capacitance C1In series with a DC voltage source, through S1、D2、S7、S8、D3Power is supplied to the load. The output voltage of the inverter is-2Vin。
9)vo＝-3Vin: as shown in fig. 4(i), the switching tube S2、S3、S5、S7、S8Conducting, and turning off the other switching tubes; diode D1、D3、D4Forward conducting, diode D2By capacitor C2Reverse cut-off; capacitor C1、C3Charged in parallel with a DC voltage source to VinWhile, at the same time, a capacitance C2In series with a DC voltage source, through D1、S3、S7、S8、D3Power is supplied to the load. The output voltage of the inverter is-3Vin。
10)vo＝-3Vin: as shown in fig. 4(j), the switching tube S1、S4、S5、S7、S8Conducting, and turning off the other switching tubes; diode D2、D4Forward conducting, diode D1、D3Are respectively covered by a capacitor C1、C3Reverse cut-off; capacitor C1Connected in series with a DC voltage source to a capacitor C2Charging, and simultaneously, the capacitor C1、C3In series with a DC voltage source, through S1、D2、S7、S8、S4Power is supplied to the load.The output voltage of the inverter is-3Vin。
11)vo＝-4Vin: as shown in fig. 4(k), the switching tube S1、S3、S7、S8Conducting, and turning off the other switching tubes; diode D3Conducting in the forward direction, and stopping the rest diodes; capacitor C1、C2In series with a DC voltage source, through S1、S3、S7、S8、D3Power is supplied to the load. The output voltage of the inverter is-4Vin。
Time domain simulation analysis is carried out on the first switched capacitor high-gain nine-level inverter by using Simulink simulation software, wherein the voltage of a direct-current voltage source is 100V, C1＝680μF，C2＝270μF，C3220 muf, load 100 omega, switching frequency 20kHz, output voltage 220V. The simulation results are shown in fig. 5. As can be seen from the figure, the simulation results are consistent with the theoretical analysis.
Fig. 6 is a transient response waveform of a first switched capacitor high gain nine level inverter load jump. At the initial moment, the load is 100 omega; the load is changed from 100 omega to 50 omega at 0.06 s; at 0.18s, the load is changed from 50 omega back to 100 omega, and the system operation condition is consistent with the initial state. As can be seen from the figure, the output voltage remains constant as the load changes.
The second switched capacitor high-gain nine-level inverter may also adopt the control logic of generating the switching tube driving signal by using sine waves and triangular waves shown in fig. 3(d), and the working state thereof is not described again.
The two types of switched capacitor high-gain nine-level inverters can obtain another control logic by exchanging the switching tube driving signals s3 and s4 obtained in the step (d) of fig. 3, and the working state and the technical effect are similar.
According to the theoretical analysis and simulation, the switched capacitor high-gain nine-level inverter provided by the invention has the advantages of simple structure, low cost, high power density and high system efficiency; the high-voltage-gain capacitor has the advantages of high voltage gain, four times of output voltage compared with input voltage, wide application range, high reliability, few switching devices, capacity of realizing charge and discharge balance of capacity voltage in a switching period, and small capacity voltage and capacitance. Therefore, the nine-level inverter with the switched capacitor and the high gain has obvious advantages compared with the prior art.

Claims (6)

1. A nine-level inverter with high gain of switched capacitor is characterized in that a DC voltage source VinIs connected to the diode D1Anode and switching tube S1Drain electrode of (V)inIs connected to the switching tube S2Source electrode and switch tube S4Source and diode D3A cathode of (a); capacitor C1Is connected to D1Cathode of (2), diode D2And a switching tube S3Drain electrode of, C1Is connected to S1Source and S of2A drain electrode of (1); capacitor C2Is connected to D2Cathode and switching tube S6Drain electrode of (1) and switching tube S8Drain electrode of, C2Is connected to S3Source electrode of (1) and switching tube S5A drain electrode of (1); capacitor C3Is connected to the diode D4And S4Drain electrode of, C3Is connected to D3Anode and switching tube S7Source electrode of (1) and switching tube S9A source electrode of (a); s5Is connected to D4The anode of (1); s6Is connected to S7And the positive pole of the load, S8Is connected to S9And the negative pole of the load.
2. The method as claimed in claim 1, wherein the sine wave u is usedsTriangular wave u1、u2、u3、u4Generating driving signals S1-S9 to control the switch tube S respectively1-S9(ii) a Wherein u is1、u2、u3、u4Has a frequency greater than usThe frequency of (c); u. of1And u2Equal frequency, 90 ° out of phase; u. u3And u4Equal frequency and 180 degrees phase difference; u. u1And u2Has a frequency of u3And u4Twice the frequency of (c); u. u1Is 0 to Ac，u2Size of Ac～2Ac，u3And u4Has a size of 2Ac～4Ac，usThe amplitude is less than 4 Ac; the method specifically comprises the following steps:
generating an intermediate signal A1-A10Wherein: a. the1＝(us>0)，A2＝not(us>0)，A3＝(abs(us)>u1)，A4＝(abs(us)>u2)，A5＝(abs(us)>u3)，A6＝not(abs(us)>u3)，A7＝(abs(us)>u4)，A8＝not(abs(us)>u4)，A9＝(abs(us)>3Ac)，A10＝not(abs(us)>3Ac)；
Generating an intermediate signal B1-B5Wherein: b is1＝(A3)xor(A4)，B2＝(A5)and(A7)，B3＝((A5)or(A7))xor(A4)，B4＝((A6)and(A9))or((A7)and(A10))，B5＝((A5)and(A10))or((A8)and(A9))；
Generating drive signals s1-s9, wherein: s1 ═ B2)or(B3)or(B5)，s2＝(B1)or(B4)，s3＝(B2)or(B4)，s4＝B5，s5＝(B4)or(B5)，s6＝not((A2)and(A3))，s7＝(A2)and(A3)，s8＝not((A1)and(A3))，s9＝(A1)and(A3)。
3. The nine-level inverter of claim 2 with high gain of switched capacitorThe control method of the inverter is characterized in that the driving signals s3 and s4 are replaced by: s3 ═ B5，s4＝(B2)or(B4)。
4. A nine level inverter of switched capacitor high gain which characterized in that: DC voltage source VinIs connected to the diode D at its cathode1And a switching tube S1Source electrode of, VinIs connected to the switching tube S2Drain electrode of (1), and switching tube S3And a diode D2The anode of (2); capacitor C1Is connected to D1Anode of (2), diode D3And a switching tube S4Source electrode of, C1Is connected to S1And S2A source electrode of (a); capacitor C2Is connected to D2Cathode and switching tube S6Drain electrode of (1) and switching tube S8Drain electrode of, C2Is connected to S3Source electrode of (1) and switching tube S5A drain electrode of (1); capacitor C3Is connected to the diode D4And S4Drain electrode of, C3Is connected to D3Anode and switching tube S7Source electrode of (1) and switching tube S9A source electrode of (a); s5Is connected to D4The anode of (1); s. the6Is connected to S7And the positive pole of the load, S8Is connected to S9And the negative electrode of the load.
5. The method as claimed in claim 4, wherein the sine wave u is usedsTriangular wave u1、u2、u3、u4Generating driving signals S1-S9 to control the switch tube S respectively1-S9(ii) a Wherein u is1、u2、u3、u4Is greater than usThe frequency of (d); u. of1And u2Equal frequency, 90 ° phase difference; u. of3And u4Equal frequency and 180 degrees phase difference; u. of1And u2Frequency of (2)Is u3And u4Twice the frequency of (c); u. of1Is 0 to Ac，u2Size of Ac～2Ac，u3And u4Has a size of 2Ac～4Ac，usThe amplitude is less than 4 Ac; the method specifically comprises the following steps:
generating an intermediate signal A1-A10Wherein: a. the1＝(us>0)，A2＝not(us>0)，A3＝(abs(us)>u1)，A4＝(abs(us)>u2)，A5＝(abs(us)>u3)，A6＝not(abs(us)>u3)，A7＝(abs(us)>u4)，A8＝not(abs(us)>u4)，A9＝(abs(us)>3Ac)，A10＝not(abs(us)>3Ac)；
Generating an intermediate signal B1-B5Wherein: b1＝(A3)xor(A4)，B2＝(A5)and(A7)，B3＝((A5)or(A7))xor(A4)，B4＝((A6)and(A9))or((A7)and(A10))，B5＝((A5)and(A10))or((A8)and(A9))；
Generating drive signals s1-s9, wherein: s1 ═ B2)or(B3)or(B5)，s2＝(B1)or(B4)，s3＝(B2)or(B4)，s4＝B5，s5＝(B4)or(B5)，s6＝not((A2)and(A3))，s7＝(A2)and(A3)，s8＝not((A1)and(A3))，s9＝(A1)and(A3)。
6. The method for controlling the switched-capacitor high-gain nine-level inverter according to claim 5, wherein the driving signals s3 and s4 are replaced by: s3 ═ B5，s4＝(B2)or(B4)。
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Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113162445A (en) * 2021-04-12 2021-07-23 湖北工业大学 Quadruple boosting nine-level switch capacitor inverter and expansion topology thereof

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102751895A (en) * 2012-06-12 2012-10-24 阳光电源股份有限公司 Multi-level circuit, grid-connected inverter and modulation method of grid-connected inverter
CN111800030A (en) * 2020-06-30 2020-10-20 广东工业大学 Multi-level inverter circuit and system based on switched capacitor and diode clamping
CN112187082A (en) * 2020-11-13 2021-01-05 国网福建省电力有限公司 Novel high-gain eight-switch nine-level inverter
CN112583252A (en) * 2020-12-04 2021-03-30 南通大学 High-power-density high-gain converter and control method thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102751895A (en) * 2012-06-12 2012-10-24 阳光电源股份有限公司 Multi-level circuit, grid-connected inverter and modulation method of grid-connected inverter
CN111800030A (en) * 2020-06-30 2020-10-20 广东工业大学 Multi-level inverter circuit and system based on switched capacitor and diode clamping
CN112187082A (en) * 2020-11-13 2021-01-05 国网福建省电力有限公司 Novel high-gain eight-switch nine-level inverter
CN112583252A (en) * 2020-12-04 2021-03-30 南通大学 High-power-density high-gain converter and control method thereof

Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN113162445A (en) * 2021-04-12 2021-07-23 湖北工业大学 Quadruple boosting nine-level switch capacitor inverter and expansion topology thereof
CN113162445B (en) * 2021-04-12 2023-07-14 湖北工业大学 Four-time boosting nine-level switch capacitor inverter and expansion topology thereof

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