CN114079396A - Nine-level converter of renewable energy power generation system - Google Patents

Nine-level converter of renewable energy power generation system Download PDF

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Publication number
CN114079396A
CN114079396A CN202010824134.0A CN202010824134A CN114079396A CN 114079396 A CN114079396 A CN 114079396A CN 202010824134 A CN202010824134 A CN 202010824134A CN 114079396 A CN114079396 A CN 114079396A
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power electronic
electronic switch
switch tube
turned
tube
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胡醇
胡德霖
杨勇
李�杰
田甜
杨支峰
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Suzhou Electrical Appliance Science Research Institute Co ltd
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Suzhou Electrical Appliance Science Research Institute Co ltd
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M7/00Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
    • H02M7/42Conversion of dc power input into ac power output without possibility of reversal
    • H02M7/44Conversion of dc power input into ac power output without possibility of reversal by static converters
    • H02M7/48Conversion 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
    • H02M7/483Converters with outputs that each can have more than two voltages levels
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J3/00Circuit arrangements for ac mains or ac distribution networks
    • H02J3/38Arrangements for parallely feeding a single network by two or more generators, converters or transformers
    • H02J3/381Dispersed generators
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02JCIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
    • H02J2300/00Systems for supplying or distributing electric power characterised by decentralized, dispersed, or local generation
    • H02J2300/20The dispersed energy generation being of renewable origin

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Dc-Dc Converters (AREA)

Abstract

The invention relates to a nine-level converter having 24 switching states S0To S23CapacitorC dc1Is controlled by voltage ofV dc /4, capacitanceC dc2Is controlled by voltage ofV dc /4, capacitanceC dc3Voltage control of 3V dc /4. Output voltage of nine-level converteru out Nine levels are provided, respectivelyV dc ,3V dc /4,2V dc /4,V dc /4,0,‑V dc /4,‑2V dc /4,‑3V dc /4,‑V dc The invention improves the efficiency and performance of the converter in the renewable energy power generation system. Therefore, the nine-level converter is very good in a renewable energy power generation systemGood application prospect.

Description

Nine-level converter of renewable energy power generation system
Technical Field
The invention relates to a nine-level converter which is applied to a renewable energy power generation system and is used for improving the performance and efficiency of the renewable energy power generation system.
Background
The new energy is pollution-free energy, and has wide application and application at home and abroad in recent years. A power generation system composed of various new energy resources is called a distributed power generation system, and the distributed power generation system has the characteristics of small scale, dispersion and the like, so that the distributed power generation system is widely researched and applied at home and abroad in recent years. The converter is used as an interface between the renewable energy source and a power grid or a load, and the performance of the converter is directly the performance of the renewable energy power generation system. In order to improve the performance of the converter of the renewable energy power generation system and reduce the size of the filter inductance of the converter, the multilevel converter becomes a new choice for the renewable energy power generation system. For a multilevel converter, if more voltage levels are required to be output, clamp diodes required by a multilevel structure with a midpoint clamp type structure are remarkably increased, the capacitance in the flying capacitor multilevel is greatly increased, and the number of isolation transformers in a cascaded H-bridge structure is greatly increased. In order to overcome the defects of multiple levels, the invention provides a novel nine-level converter, and the efficiency and the performance of the converter in a renewable energy power generation system are improved. Therefore, the nine-level converter has a good application prospect in a renewable energy power generation system.
Disclosure of Invention
The object of the present invention is to invent a nine-level converter capable of further increasing the number of output voltages of a multilevel converter and minimizing the components of the multilevel inverter. In order to achieve the purpose, the invention adopts the technical scheme that:
a nine-level converter comprises a power electronic switch tube SW1, a power electronic switch tube SW2, a power electronic switch tube SW3, a power electronic switch tube SW4, a power electronic switch tube SW5, a power electronic switch tube SW6, a power electronic switch tube SW7, a power electronic switch tube SW8, a power electronic switch tube SW9, a power electronic switch tube SW10 and a capacitorC dc1Capacitor and method for manufacturing the sameC dc2And a capacitorC dc3And (4) forming. The nine-level converter has a converter input consisting of an input point P and an input point NAnd a converter output consisting of output point a and output point B.
The drain of the power electronic switch tube SW1 is connected to the nine-level converter input point P, the source of the power electronic switch tube SW1 is connected to the drain of the power electronic switch tube SW2 at point P1, the source of the power electronic switch tube SW2 is connected to the drain of the power electronic switch tube SW3 at point P2, the source of the power electronic switch tube SW3 is connected to the drain of the power electronic switch tube SW4 at point P3, the source of the power electronic switch tube SW4 is connected to the drain of the power electronic switch tube SW5 at output point A, the source of the power electronic switch tube SW5 is connected to the drain of the power electronic switch tube SW6 at output point N3, the source of the power electronic switch tube SW6 is connected to the drain of the power electronic switch tube SW7 at output point N2, the source of the power electronic switch tube SW7 is connected to the drain of the power electronic switch tube SW8 at output point N1, and the source of the power electronic switch tube SW8 is connected to the nine-level converter input terminal N1, the drain of the power electronic switch SW9 is connected to the input point P, the source of the power electronic switch SW9 is connected to the drain of the power electronic switch SW10 at the output point B, and the source of the power electronic switch SW10 is connected to the input point N. The anode of the power diode D1 is connected with the cathode of the power diode D2 at the point O, the cathode of the power diode D1 is connected with the point P3, the anode of the power diode D2 is connected with the point N3, and the capacitorC dc1One end connected to point P2 and the other end connected to point O, and capacitorC dc2One end connected to point N2 and the other end connected to point O, and capacitorC dc3One end is connected to point P1 and the other end is connected to point N1.
The nine-level converter has 24 switch states S0To S23The switching state and the converter output voltage are shown in table 1 (with N point as reference voltage), where "1" represents the power electronic switch tube is on, and "0" represents the power electronic switch tube is off, and the capacitorC dc1Is controlled by voltage ofV dc /4, capacitanceC dc2Is controlled by voltage ofV dc /4, capacitanceC dc3Voltage control of 3V dc /4. As can be seen from table 1: nine-power-supplyOutput voltage of flat converteru out Nine levels are provided, respectivelyV dc , 3V dc /4, 2V dc /4, V dc /4, 0, -V dc /4, -2V dc /4, -3V dc /4, -V dc .
Switch state S0: the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW4 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is equal toV dc
Switch state S1: the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW4, the power electronic switch tube SW5 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW3, the power electronic switch tube SW6, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is 3V dc /4。
Switch state S2: the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW1, the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW7 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is 3V dc /4。
Switch state S3: the power electronic switch tube SW1, the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW7 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW2, the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is 3V dc /4。
Switch state S4: the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW5, the power electronic switch tube SW6 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is 2V dc /4。
Switch state S5: the power electronic switch tube SW1, the power electronic switch tube SW4, the power electronic switch tube SW5, the power electronic switch tube SW7 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW6, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is 2V dc /4。
Switch state S6: the power electronic switch tube SW1, the power electronic switch tube SW4, the power electronic switch tube SW5, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW1, the power electronic switch tube SW3, the power electronic switch tube SW6, the power electronic switch tube SW7 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is 2V dc /4。
Switch state S7: the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW5, the power electronic switch tube SW6 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is 2V dc /4。
Switch state S8: the power electronic switch tube SW4, the power electronic switch tube SW5, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW6 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is equal toV dc /4。
Switch state S9: the power electronic switch tube SW1, the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW7 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is equal toV dc /4。
Switch state S10: the power electronic switch tube SW1, the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW7 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is equal toV dc /4。
Switch state S11: the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW4 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is 0.
Switch state S12: the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW4 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is 0.
Switch state S13: the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW4, the power electronic switch tube SW5 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW3, the power electronic switch tube SW6, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is-V dc /4。
Switch state S14: electric powerThe sub-switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW1, the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW7 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is-V dc /4。
Switch state S15: the power electronic switch tube SW1, the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW7 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW2, the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is-V dc /4。
Switch state S16: the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW5, the power electronic switch tube SW6 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is-2V dc /4。
Switch state S17: the power electronic switch tube SW1, the power electronic switch tube SW4, the power electronic switch tube SW5, the power electronic switch tube SW7 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW6, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is-2V dc /4。
Switch state S18: the power electronic switch tube SW1, the power electronic switch tube SW4, the power electronic switch tube SW5, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW1, the power electronic switch tube SW3, the power electronic switch tube SW6, the power electronic switch tube SW7 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is-2V dc /4。
Switch-likeState S19: the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW5, the power electronic switch tube SW6 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is-2V dc /4。
Switch state S20: the power electronic switch tube SW4, the power electronic switch tube SW5, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW6 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is-3V dc /4。
Switch state S21: the power electronic switch tube SW1, the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW7 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is-3V dc /4。
Switch state S22: the power electronic switch tube SW1, the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW7 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is-3V dc /4。
Switch state S23: the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW4 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is-V dc
Due to the application of the technical scheme, compared with the prior art, the invention has the following advantages: the invention greatly reduces the number of power electronic switching tubes required by the conventional multi-level inverter, thereby greatly reducing the cost of the converter and improving the efficiency of the inverter, and has good application prospect in a renewable energy power generation system.
Drawings
Fig. 1 is a circuit diagram of a nine-level converter of the present invention.
Detailed Description
The invention will be further described with reference to examples of embodiments shown in the drawings to which the invention is attached.
The first embodiment is as follows: as shown in fig. 1, a nine-level converter includes a power electronic switch SW1, a power electronic switch SW2, a power electronic switch SW3, a power electronic switch SW4, a power electronic switch SW5, a power electronic switch SW6, a power electronic switch SW7, a power electronic switch SW8, a power electronic switch SW9, a power electronic switch SW10 and a capacitor SW10C dc1Capacitor and method for manufacturing the sameC dc2And a capacitorC dc3And (4) forming. The nine-level converter has a converter input formed by an input point P and an input point N and a converter output formed by an output point a and an output point B. In the system of the invention, an Insulated Gate Bipolar Transistor (IGBT) can be used as the power electronic switching tube.
The nine-level converter has the specific structure that: the drain of the power electronic switch tube SW1 is connected to the input point P of the nine-level converter, the source of the power electronic switch tube SW1 is connected to the drain of the power electronic switch tube SW2 at the point P1, the source of the power electronic switch tube SW2 is connected to the drain of the power electronic switch tube SW3 at the point P2, the source of the power electronic switch tube SW3 is connected to the drain of the power electronic switch tube SW4 at the point P3, the source of the power electronic switch tube SW4 is connected to the drain of the power electronic switch tube SW5 at the output point A, the source of the power electronic switch tube SW5 is connected to the drain of the power electronic switch tube SW6 at the output point N3, and the source of the power electronic switch tube SW6 is connected to the drain of the power electronic switch tube SW7 at the output point N3The output point N2 is that the source of the power electronic switch SW7 is connected to the drain of the power electronic switch SW8 at the output point N1, the source of the power electronic switch SW8 is connected to the input terminal N of the nine-level converter, the drain of the power electronic switch SW9 is connected to the input point P, the source of the power electronic switch SW9 is connected to the drain of the power electronic switch SW10 at the output point B, and the source of the power electronic switch SW10 is connected to the input point N. The anode of the power diode D1 is connected with the cathode of the power diode D2 at the point O, the cathode of the power diode D1 is connected with the point P3, the anode of the power diode D2 is connected with the point N3, and the capacitorC dc1One end connected to point P2 and the other end connected to point O, and capacitorC dc2One end connected to point N2 and the other end connected to point O, and capacitorC dc3One end is connected to point P1 and the other end is connected to point N1. The output ends of the nine-level converter are a point A and a point B.
The nine-level converter has 24 switch states S0To S23The switching state and the converter output voltage are shown in table 1 (with N point as reference voltage), where "1" represents the power electronic switch tube is on, and "0" represents the power electronic switch tube is off, and the capacitorC dc1Is controlled by voltage ofV dc /4, capacitanceC dc2Is controlled by voltage ofV dc /4, capacitanceC dc3Voltage control of 3V dc /4. As can be seen from table 1: output voltage of nine-level converteru out Nine levels are provided, respectivelyV dc , 3V dc /4, 2V dc /4, V dc /4, 0, -V dc /4, -2V dc /4, -3V dc /4, -V dc .。
Switch state S0: the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW4 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW7 and the power electronic switchThe tube SW8 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter isV dc
Switch state S1: the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW4, the power electronic switch tube SW5 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW3, the power electronic switch tube SW6, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is 3V dc /4。
Switch state S2: the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW1, the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW7 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is 3V dc /4。
TABLE 1 nine-level inverter system output voltage and switch state
On-off state SW1 SW2 SW3 SW4 SW5 SW6 SW7 SW8 SW9 SW10 u out
S0 1 1 1 1 0 0 0 0 0 1 V dc
S1 1 1 0 1 1 0 0 0 0 1 3V dc /4
S2 0 1 1 1 0 0 0 1 0 1 3V dc /4
S3 1 0 1 1 0 0 1 0 0 1 3V dc /4
S4 1 1 0 0 1 1 0 0 0 1 2V dc /4
S5 1 0 0 1 1 0 1 0 0 1 2V dc /4
S6 0 1 0 1 1 0 0 1 0 1 2V dc /4
S7 0 0 1 1 0 0 1 1 0 1 2V dc /4
S8 0 0 0 1 1 0 1 1 0 1 V dc /4
S9 1 0 0 0 1 1 1 0 0 1 V dc /4
S10 0 1 0 0 1 1 0 1 0 1 V dc /4
S11 0 0 0 0 1 1 1 1 0 1 0
S12 1 1 1 1 0 0 0 0 1 0 0
S13 1 1 0 1 1 0 0 0 1 0 -V dc /4
S14 0 1 1 1 0 0 0 1 1 0 -V dc /4
S15 1 0 1 1 0 0 1 0 1 0 -V dc /4
S16 1 1 0 0 1 1 0 0 1 0 -2V dc /4
S17 1 0 0 1 1 0 1 0 1 0 -2V dc /4
S18 0 1 0 1 1 0 0 1 1 0 -2V dc /4
S19 0 0 1 1 0 0 1 1 1 0 -2V dc /4
S20 0 0 0 1 1 0 1 0 1 0 -3V dc /4
S21 1 0 0 0 1 1 1 0 1 0 -3V dc /4
S22 0 1 0 0 1 1 0 1 1 0 -3V dc /4
S23 0 0 0 0 1 1 1 1 1 0 -V dc
Switch state S3: the power electronic switch tube SW1, the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW7 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW2, the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is 3V dc /4。
Switch state S4: the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW5, the power electronic switch tube SW6 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is 2V dc /4。
Switch state S5: the power electronic switch tube SW1, the power electronic switch tube SW4, the power electronic switch tube SW5, the power electronic switch tube SW7 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW6, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is 2V dc /4。
Switch state S6: the power electronic switch tube SW1, the power electronic switch tube SW4, the power electronic switch tube SW5, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW1, the power electronic switch tube SW3, the power electronic switch tube SW6, the power electronic switch tube SW7 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is 2V dc /4。
Switch state S7: the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW5, the power electronic switch tube SW6 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is 2V dc /4。
Switch state S8: the power electronic switch tube SW4, the power electronic switch tube SW5, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW6 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is equal toV dc /4。
Switch state S9: the power electronic switch tube SW1, the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW7 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is equal toV dc /4。
Switch state S10: the power electronic switch tube SW1, the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW7 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is equal toV dc /4。
Switch state S11: the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW4 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is 0.
Switch state S12: the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW4 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is 0.
Switch-likeState S13: the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW4, the power electronic switch tube SW5 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW3, the power electronic switch tube SW6, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is-V dc /4。
Switch state S14: the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW1, the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW7 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is-V dc /4。
Switch state S15: the power electronic switch tube SW1, the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW7 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW2, the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is-V dc /4。
Switch state S16: the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW5, the power electronic switch tube SW6 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is-2V dc /4。
Switch state S17: the power electronic switch tube SW1, the power electronic switch tube SW4, the power electronic switch tube SW5, the power electronic switch tube SW7 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW6, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is-2V dc /4。
Switch state S18: the power electronic switch tube SW1, the power electronic switch tube SW4, the power electronic switch tube SW5, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW1, the power electronic switch tube SW3, the power electronic switch tube SW6, the power electronic switch tube SW7 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is-2V dc /4。
Switch state S19: the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW5, the power electronic switch tube SW6 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is-2V dc /4。
Switch state S20: the power electronic switch tube SW4, the power electronic switch tube SW5, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW6 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is-3V dc /4。
Switch state S21: the power electronic switch tube SW1, the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW7 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is-3V dc /4。
Switch state S22: the power electronic switch tube SW1, the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW7 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is-3V dc /4。
Switch state S23: the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW4 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is-V dc
The nine-level converter can further improve the output level quantity of the converter, greatly improve the performance of the converter and reduce the size of the output filter inductor of the inverter, thereby further improving the efficiency of the inverter and having good application prospect in a renewable energy power generation system.
The above embodiments are merely illustrative of the technical ideas and features of the present invention, and the purpose thereof is to enable those skilled in the art to understand the contents of the present invention and implement the present invention, and not to limit the protection scope of the present invention. All equivalent changes and modifications made according to the spirit of the present invention should be covered within the protection scope of the present invention.

Claims (3)

1. A nine-level converter, characterized by: a nine-level converter comprises a power electronic switch tube SW1, a power electronic switch tube SW2, a power electronic switch tube SW3, a power electronic switch tube SW4, a power electronic switch tube SW5, a power electronic switch tube SW6, a power electronic switch tube SW7, a power electronic switch tube SW8, a power electronic switch tube SW9, a power electronic switch tube SW10 and a capacitorC dc1Capacitor and method for manufacturing the sameC dc2And a capacitorC dc3The nine-level converter has a converter input terminal composed of an input point P and an input point N, and a converter output terminal composed of an output point A and an output point B.
2. The single-phase eleven-level inverter according to claim 1, wherein: the drain of the power electronic switch tube SW1 is connected to the input point P of the nine-level converter, and the power electronic switch tube SW1The source of the power electronic switch tube SW2 is connected to the drain of the power electronic switch tube SW2 at point P1, the source of the power electronic switch tube SW2 is connected to the drain of the power electronic switch tube SW3 at point P2, the source of the power electronic switch tube SW3 is connected to the drain of the power electronic switch tube SW4 at point P3, the source of the power electronic switch tube SW4 is connected to the drain of the power electronic switch tube SW5 at output point a, the source of the power electronic switch tube SW5 is connected to the drain of the power electronic switch tube SW6 at output point N3, the source of the power electronic switch tube SW6 is connected to the drain of the power electronic switch tube SW7 at output point N2, the source of the power electronic switch tube SW7 is connected to the drain of the power electronic switch tube SW8 at output point N1, the source of the power electronic switch tube SW8 is connected to the nine-level input terminal N, the drain of the power electronic switch tube SW9 is connected to the drain of the power electronic switch tube SW9 at output point B at output point P10, the source of the power electronic switch tube SW10 is connected to the input point N, the anode of the power diode D1 is connected to the cathode of the power diode D2 at the point O, the cathode of the power diode D1 is connected to the point P3, the anode of the power diode D2 is connected to the point N3, the capacitorC dc1One end connected to point P2 and the other end connected to point O, and capacitorC dc2One end connected to point N2 and the other end connected to point O, and capacitorC dc3One end is connected to point P1 and the other end is connected to point N1.
3. Nine-level converter according to claims 1 and 2, characterized in that: the nine-level inverter has 24 states S0To S23
Switch state S0: the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW4 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is equal toV dc
Switch state S1: power electronic switch tube SW1, power electronic switch tube SW2 and power electronic switchThe switch tube SW4, the power electronic switch tube SW5 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW3, the power electronic switch tube SW6, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is 3V dc /4;
Switch state S2: the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW1, the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW7 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is 3V dc /4;
Switch state S3: the power electronic switch tube SW1, the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW7 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW2, the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is 3V dc /4;
Switch state S4: the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW5, the power electronic switch tube SW6 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is 2V dc /4;
Switch state S5: the power electronic switch tube SW1, the power electronic switch tube SW4, the power electronic switch tube SW5, the power electronic switch tube SW7 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW6, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is 2V dc /4;
Switch state S6: power electronic switch tube SW1, power electronic switch tube SW4, and powerThe power electronic switch tube SW5, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW1, the power electronic switch tube SW3, the power electronic switch tube SW6, the power electronic switch tube SW7 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is 2V dc /4;
Switch state S7: the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW5, the power electronic switch tube SW6 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is 2V dc /4;
Switch state S8: the power electronic switch tube SW4, the power electronic switch tube SW5, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW6 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is equal toV dc /4;
Switch state S9: the power electronic switch tube SW1, the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW7 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is equal toV dc /4;
Switch state S10: the power electronic switch tube SW1, the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW7 and the power electronic switch tube SW9 are turned off, and the output voltage of the nine-level converter is equal toV dc /4;
Switch state S11: power electronic switch tube SW5 and power electronic switch tubeThe output voltage of the nine-level converter is 0 when the SW6, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned on, the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW4 and the power electronic switch tube SW9 are turned off;
switch state S12: the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW4 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is 0;
switch state S13: the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW4, the power electronic switch tube SW5 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW3, the power electronic switch tube SW6, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is-V dc /4;
Switch state S14: the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW1, the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW7 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is-V dc /4;
Switch state S15: the power electronic switch tube SW1, the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW7 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW2, the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is-V dc /4;
Switch state S16: power electronic switch tube SW1, power electronic switch tube SW2, power electronic switch tube SW5 and power electronicsThe switch tube SW6 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is-2V dc /4;
Switch state S17: the power electronic switch tube SW1, the power electronic switch tube SW4, the power electronic switch tube SW5, the power electronic switch tube SW7 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW6, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is-2V dc /4;
Switch state S18: the power electronic switch tube SW1, the power electronic switch tube SW4, the power electronic switch tube SW5, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW1, the power electronic switch tube SW3, the power electronic switch tube SW6, the power electronic switch tube SW7 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is-2V dc /4;
Switch state S19: the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW5, the power electronic switch tube SW6 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is-2V dc /4;
Switch state S20: the power electronic switch tube SW4, the power electronic switch tube SW5, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW6 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is-3V dc /4;
Switch state S21: power electronic switch tube SW1, power electronic switch tube SW5 and power electronic switchThe tube SW6, the power electronic switch tube SW7 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW8 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is-3V dc /4;
Switch state S22: the power electronic switch tube SW1, the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW4, the power electronic switch tube SW7 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is-3V dc /4;
Switch state S23: the power electronic switch tube SW5, the power electronic switch tube SW6, the power electronic switch tube SW7, the power electronic switch tube SW8 and the power electronic switch tube SW9 are turned on, the power electronic switch tube SW1, the power electronic switch tube SW2, the power electronic switch tube SW3, the power electronic switch tube SW4 and the power electronic switch tube SW10 are turned off, and the output voltage of the nine-level converter is-V dc
CN202010824134.0A 2020-08-17 2020-08-17 Nine-level converter of renewable energy power generation system Pending CN114079396A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010824134.0A CN114079396A (en) 2020-08-17 2020-08-17 Nine-level converter of renewable energy power generation system

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010824134.0A CN114079396A (en) 2020-08-17 2020-08-17 Nine-level converter of renewable energy power generation system

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CN114079396A true CN114079396A (en) 2022-02-22

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Family Applications (1)

Application Number Title Priority Date Filing Date
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Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080100370A1 (en) * 2006-10-31 2008-05-01 Chun-Chung Chen Charge pump
CN104883072A (en) * 2015-05-27 2015-09-02 中国矿业大学 Transformerless ac-dc-ac cascade multilevel converter
CN107276441A (en) * 2017-07-18 2017-10-20 江苏固德威电源科技股份有限公司 Striding capacitance five-electrical level inverter, phase-shifting control method and grid-connected power generation system

Patent Citations (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US20080100370A1 (en) * 2006-10-31 2008-05-01 Chun-Chung Chen Charge pump
CN104883072A (en) * 2015-05-27 2015-09-02 中国矿业大学 Transformerless ac-dc-ac cascade multilevel converter
CN107276441A (en) * 2017-07-18 2017-10-20 江苏固德威电源科技股份有限公司 Striding capacitance five-electrical level inverter, phase-shifting control method and grid-connected power generation system

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