CN102664546A - Five-level current transformation topological structure with bi-directional power switch and applications thereof - Google Patents

Five-level current transformation topological structure with bi-directional power switch and applications thereof Download PDF

Info

Publication number
CN102664546A
CN102664546A CN2012101597294A CN201210159729A CN102664546A CN 102664546 A CN102664546 A CN 102664546A CN 2012101597294 A CN2012101597294 A CN 2012101597294A CN 201210159729 A CN201210159729 A CN 201210159729A CN 102664546 A CN102664546 A CN 102664546A
Authority
CN
China
Prior art keywords
power switch
way power
diode
capacitor
link
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Pending
Application number
CN2012101597294A
Other languages
Chinese (zh)
Inventor
李武华
罗皓泽
何湘宁
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Zhejiang University ZJU
Original Assignee
Zhejiang University ZJU
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Zhejiang University ZJU filed Critical Zhejiang University ZJU
Priority to CN2012101597294A priority Critical patent/CN102664546A/en
Publication of CN102664546A publication Critical patent/CN102664546A/en
Pending legal-status Critical Current

Links

Images

Landscapes

  • Power Conversion In General (AREA)

Abstract

The invention discloses a five-level current transformation topological structure with a bi-directional power switch, comprising a capacitance link and a current transformation unit, wherein the capacitance link consists of four capacitors connected in series; the current transformation unit consists of two bi-directional power switches, two diodes and four switch tubes with anti-parallel diodes. The invention also discloses a three-phase five-level current transformer adopting the topological structure. According to the topological structure and the three-phase five-level current transformer, the bi-directional current flowing of the bi-directional power switch is controlled, and also the output of multiple levels of a circuit can be ensured as paths of the positive current and the negative current are controlled independently by utilizing the bi-directional power switch; on the basis of outputting five levels, the number of power devices and direct-voltage sources can be reduced greatly, the voltage stress of the bi-directional power switch is only one fourth of the bus voltage, the topological structure is symmetrical, and the modularized production is convenient.

Description

A kind of five level unsteady flow topological structure and application thereof with two-way power switch
Technical field
The invention belongs to electric power Semiconductor Converting Technology field, be specifically related to a kind of five level unsteady flow topological structure and application thereof with two-way power switch.
Background technology
In recent years, shortage of energy sources and environmental pollution have become the focus of world attention, and the policy of " energy-saving and emission-reduction " of advocating energetically in country is advocated down, and the economize on electricity under the mesohigh large-power occasions subtracts can be very urgent especially.China's existing mesohigh high power AC motor is direct startup mostly; Take valve regulated or fluid power coupled modes to carry out speed governing, this mode of speed regulation makes waste of energy huge, along with the fast development of China's electric utility; The demand of industrial quarters centering high-power current transformer is increasing; When these high power motors adopted frequency control, fractional energy savings can reach 10% ~ 70%, on average about 30%.Since the high-voltage and high-power power electronic device cost an arm and a leg with and restraining factors in many ways such as key technology, adopting multilevel converter is the important directions that realizes the mesohigh high-power converter.Compare with traditional current transformer, many level current transformers can use withstand voltage lower device to realize higher voltage output; Harmonic wave of output voltage content is little, in the new forms of energy occasion of generating electricity by way of merging two or more grid systems, with the quality of power supply that improves output greatly; Drag in the field at motor, the increase of current transformer output level number can make output dv/dt reduce, and has reduced the infringement of electromagnetic interference and electrical machine insulation.
In five common level unsteady flow topological structures, conventional diode clamped five-level unsteady flow topology is as shown in Figure 1; 8 of the required full-control type power devices of its single brachium pontis, 12 of clamping diodes, 4 electric capacity of DC side series connection.And along with the increase of output level number, the quantity of clamping diode and active power device will increase greatly.The cost of this topological structure is high, and complex structural designs is unfavorable for actual industrial applications.
At the many level current transformers of a kind of very widely units in series H bridge of industrial applications; As shown in Figure 2; Its each H bridge power unit all needs independently voltage fed; Adopt 8 of the required full-control type power devices of three-phase five its single brachium pontis of level cascaded H bridge current transformer of this topological structure, two direct voltage sources independently, whole three-phase current transformer need independently direct voltage source of 24 of full-control type power devices and six.Along with the raising of output voltage grade, the H bridge power unit number of series connection is with independently the direct voltage source number is also more and more, and the needed like this phase shifting transformer secondary number of windings also need roll up.Brought the volume of phase shift isolating transformer to increase, manufacture difficulty increases, problems such as cost increase thereupon.
Summary of the invention
To the above-mentioned technological deficiency of existing in prior technology, the invention provides a kind of five level unsteady flow topological structure and application thereof with two-way power switch, significantly reduced the quantity of power device and direct voltage source.
A kind of five level unsteady flow topological structures with two-way power switch comprise a capacitance link and a current transforming unit;
Described capacitance link is made up of four electric capacity; Wherein, capacitor C 1An end link to each other capacitor C with the positive pole of outside direct voltage source 1The other end and capacitor C 2An end link to each other capacitor C 2The other end and capacitor C 3An end link to each other capacitor C 3The other end and capacitor C 4An end link to each other capacitor C 4The other end link to each other with the negative pole of outside direct voltage source;
Described current transforming unit is made up of two two-way power switch, two diodes and four band switching tubes anti-and diode; Wherein, the anti-also switching tube S of diode of band 1Input and capacitor C 1An end link to each other the switching tube S of the anti-and diode of band 1The switching tube S of output and diode anti-with band 2Input, two-way power switch Q 1An end and diode D 1Negative electrode link to each other two-way power switch Q 1The other end and capacitor C 2An end link to each other the switching tube S of the anti-and diode of band 2The switching tube S of output and diode anti-with band 3Input link to each other and be level output end, band is the switching tube S of diode also instead 3The switching tube S of output and diode anti-with band 4Input, two-way power switch Q 2An end and diode D 2Anode link to each other two-way power switch Q 2The other end and capacitor C 4An end link to each other the switching tube S of the anti-and diode of band 4Output and capacitor C 4The other end link to each other diode D 1Anode and diode D 2Negative electrode and capacitor C 3An end link to each other, the anti-and switching tube of diode of described band and the control end of two-way power switch all receive the switch controlling signal that external equipment provides.
A kind of three-phase five level current transformers with two-way power switch comprise a capacitance link and three current transforming units;
Described capacitance link is made up of four electric capacity; Wherein, capacitor C 1An end link to each other capacitor C with the positive pole of outside direct voltage source 1The other end and capacitor C 2An end link to each other capacitor C 2The other end and capacitor C 3An end link to each other capacitor C 3The other end and capacitor C 4An end link to each other capacitor C 4The other end link to each other with the negative pole of outside direct voltage source;
Described current transforming unit is made up of two two-way power switch, two diodes and four band switching tubes anti-and diode; Wherein, the anti-also switching tube S of diode of band 1Input and capacitor C 1An end link to each other the switching tube S of the anti-and diode of band 1The switching tube S of output and diode anti-with band 2Input, two-way power switch Q 1An end and diode D 1Negative electrode link to each other two-way power switch Q 1The other end and capacitor C 2An end link to each other the switching tube S of the anti-and diode of band 2The switching tube S of output and diode anti-with band 3Input link to each other and be the level output end of corresponding phase, band is the switching tube S of diode also instead 3The switching tube S of output and diode anti-with band 4Input, two-way power switch Q 2An end and diode D 2Anode link to each other two-way power switch Q 2The other end and capacitor C 4An end link to each other the switching tube S of the anti-and diode of band 4Output and capacitor C 4The other end link to each other diode D 1Anode and diode D 2Negative electrode and capacitor C 3An end link to each other, the anti-and switching tube of diode of described band and the control end of two-way power switch all receive the switch controlling signal that external equipment provides.
Preferably, described band switching tube anti-and diode adopts IGBT.Existing IGBT technology makes its current range reach as high as 1500A, and electric pressure can reach 6500V, especially satisfies the powerful application scenario of mesohigh.
Described two-way power switch is made up of two IGBT; Wherein, The current collection of the one IGBT is an end of two-way power switch very; The emitter of the one IGBT links to each other with the emitter of the 2nd IGBT, and the current collection of the 2nd IGBT is the other end of two-way power switch very, and the gate pole of the gate pole of an IGBT and the 2nd IGBT is two control ends of two-way power switch.
Described two-way power switch is made up of two switching tubes; Wherein, The input of first switching tube links to each other with the output of second switch pipe and is an end of two-way power switch; First output end of switching tube links to each other with the input of second switch pipe and is that the other end of two-way power switch, the control end of first control end of switching tube and second switch pipe are two control ends of two-way power switch.
The two-way power switch of these two kinds of structures can independently be controlled the flow path of reversal, and path meritorious and reactive current is provided during for circuit output expectation level.The latter can pass through modular implementation with respect to the former, and volume is littler, the device count that electric current is flowed through still less, loss is also more little.
The present invention utilizes two-way power switch to align the independent control of negative current path, can control the electric current two-way flow on the two-way power switch, has guaranteed the output of the multiple level of circuit again; On the basis of five kinds of level of output, significantly reduced the quantity of power device and direct voltage source.
Two-way power switch is connected in switching tube S 1/ S 3With switching tube S 2/ S 4Between, this syndeton can directly use T type three level modules to realize, and then reduces system bulk, improves power density, and the voltage stress of two-way power switch is merely 1/4 of busbar voltage, and the topological structure symmetry makes things convenient for modularization production.
Description of drawings
Fig. 1 is the sketch map of conventional diode clamped five-level topological structure.
Fig. 2 is the sketch map of five level cascaded H bridge unsteady flow topological structures.
Fig. 3 is the sketch map of a kind of unsteady flow topological structure of the present invention instance.
Fig. 4 is the sketch map of the another kind of unsteady flow topological structure of the present invention instance.
Fig. 5 is the structural representation of three-phase five level current transformers of the present invention.
Fig. 6 is the output line voltage oscillogram that three-phase five level current transformers of the present invention connect star-like load.
Embodiment
In order to describe the present invention more particularly, technical scheme of the present invention is elaborated below in conjunction with accompanying drawing and embodiment.
As shown in Figure 3, a kind of five level unsteady flow topological structures with two-way power switch comprise a capacitance link and a current transforming unit;
Capacitance link is by four capacitor C 1~ C 4Form; Wherein, capacitor C 1An end link to each other capacitor C with the positive pole of outside direct voltage source 1The other end and capacitor C 2An end link to each other capacitor C 2The other end and capacitor C 3An end link to each other capacitor C 3The other end and capacitor C 4An end link to each other capacitor C 4The other end link to each other with the negative pole of outside direct voltage source;
Current transforming unit is by two two-way power switch Q 1~ Q 2, two diode D 1~ D 2With four IGBT S 1~ S 4Form; Wherein, IGBT S 1Collector electrode and capacitor C 1An end link to each other IGBT S 1Emitter and IGBTS 2Collector electrode, two-way power switch Q 1An end and diode D 1Negative electrode link to each other two-way power switch Q 1The other end and capacitor C 2An end link to each other IGBT S 2Emitter and IGBT S 3Collector electrode link to each other and be level output end, IGBT S 3Emitter and IGBT S 4Collector electrode, two-way power switch Q 2An end and diode D 2Anode link to each other two-way power switch Q 2The other end and capacitor C 4An end link to each other IGBT S 4Emitter and capacitor C 4The other end link to each other diode D 1Anode and diode D 2Negative electrode and capacitor C 3An end link to each other, the gate pole of IGBT and the control end of two-way power switch all receive the switch controlling signal that external equipment provides.
In this execution mode, two-way power switch is made up of two IGBT; Wherein, an IGBT S 5/ S 7A current collection end of two-way power switch very, an IGBT S 5/ S 7Emitter and the 2nd IGBT S 6/ S 8Emitter link to each other the 2nd IGBT S 6/ S 8The current collection other end of two-way power switch very, an IGBTS 5/ S 7Gate pole and the 2nd IGBT S 6/ S 8Gate pole be two control ends of two-way power switch.
As another kind of execution mode, as shown in Figure 4, the two-way power switch in the unsteady flow topological structure is made up of two switching tubes; Wherein, the first switching tube S 5/ S 7Input and second switch pipe S 6/ S 8Output link to each other and be an end of two-way power switch, the first switching tube S 5/ S 7Output and second switch pipe S 6/ S 8Input link to each other and be the other end of two-way power switch, the first switching tube S 5/ S 7Control end and second switch pipe S 6/ S 8Control end be two control ends of two-way power switch.
Topological structure with Fig. 4 is an example, and the output composition principle of five kinds of level is following:
Work as S 1, S 2With the S in the two-way power switch 6And S 8Open-minded, promptly break off S 3, S 4, S 5, S 7The time, this moment V o=2E;
Work as S 2With the S in the two-way power switch 5, S 6, S 7Open-minded, promptly break off S 1, S 3, S 4, S 8The time, this moment V o=1E;
Work as S 2, S 3With the S in the two-way power switch 5, S 8Open-minded, promptly break off S 1, S 4, S 6, S 7The time, this moment V o=0E;
Work as S 3With the S in the two-way power switch 5, S 7, S 8Open-minded, promptly break off S 1, S 2, S 4, S 6The time, this moment V o=-1E;
Work as S 3, S 4With the S in the two-way power switch 5, S 7Open-minded, promptly break off S 1, S 2, S 6, S 8The time, this moment V o=-2E.
The five level unsteady flow topological structures of this execution mode both can directly constitute single-phase five level current transformers, can construct three-phase as shown in Figure 5 five level current transformers again; Three level output ends of three-phase five level current transformers of this execution mode topological structure are connected the star-like balanced load of three-phase respectively; Then its output line voltage waveform is as shown in Figure 6; The visible exportable line voltage with 9 kinds of level of current transformer from figure, output line voltage changes a level at every turn.

Claims (8)

1. five level unsteady flow topological structures with two-way power switch is characterized in that: comprise a capacitance link and a current transforming unit;
Described capacitance link is made up of four electric capacity; Wherein, capacitor C 1An end link to each other capacitor C with the positive pole of outside direct voltage source 1The other end and capacitor C 2An end link to each other capacitor C 2The other end and capacitor C 3An end link to each other capacitor C 3The other end and capacitor C 4An end link to each other capacitor C 4The other end link to each other with the negative pole of outside direct voltage source;
Described current transforming unit is made up of two two-way power switch, two diodes and four band switching tubes anti-and diode; Wherein, the anti-also switching tube S of diode of band 1Input and capacitor C 1An end link to each other the switching tube S of the anti-and diode of band 1The switching tube S of output and diode anti-with band 2Input, two-way power switch Q 1An end and diode D 1Negative electrode link to each other two-way power switch Q 1The other end and capacitor C 2An end link to each other the switching tube S of the anti-and diode of band 2The switching tube S of output and diode anti-with band 3Input link to each other and be level output end, band is the switching tube S of diode also instead 3The switching tube S of output and diode anti-with band 4Input, two-way power switch Q 2An end and diode D 2Anode link to each other two-way power switch Q 2The other end and capacitor C 4An end link to each other the switching tube S of the anti-and diode of band 4Output and capacitor C 4The other end link to each other diode D 1Anode and diode D 2Negative electrode and capacitor C 3An end link to each other, the anti-and switching tube of diode of described band and the control end of two-way power switch all receive the switch controlling signal that external equipment provides.
2. five level unsteady flow topological structures with two-way power switch according to claim 1 is characterized in that: described band switching tube anti-and diode adopts IGBT.
3. five level unsteady flow topological structures with two-way power switch according to claim 1, it is characterized in that: described two-way power switch is made up of two IGBT; Wherein, The current collection of the one IGBT is an end of two-way power switch very; The emitter of the one IGBT links to each other with the emitter of the 2nd IGBT, and the current collection of the 2nd IGBT is the other end of two-way power switch very, and the gate pole of the gate pole of an IGBT and the 2nd IGBT is two control ends of two-way power switch.
4. five level unsteady flow topological structures with two-way power switch according to claim 1, it is characterized in that: described two-way power switch is made up of two switching tubes; Wherein, The input of first switching tube links to each other with the output of second switch pipe and is an end of two-way power switch; First output end of switching tube links to each other with the input of second switch pipe and is that the other end of two-way power switch, the control end of first control end of switching tube and second switch pipe are two control ends of two-way power switch.
5. three-phase five level current transformers with two-way power switch is characterized in that: comprise a capacitance link and three current transforming units;
Described capacitance link is made up of four electric capacity; Wherein, capacitor C 1An end link to each other capacitor C with the positive pole of outside direct voltage source 1The other end and capacitor C 2An end link to each other capacitor C 2The other end and capacitor C 3An end link to each other capacitor C 3The other end and capacitor C 4An end link to each other capacitor C 4The other end link to each other with the negative pole of outside direct voltage source;
Described current transforming unit is made up of two two-way power switch, two diodes and four band switching tubes anti-and diode; Wherein, the anti-also switching tube S of diode of band 1Input and capacitor C 1An end link to each other the switching tube S of the anti-and diode of band 1The switching tube S of output and diode anti-with band 2Input, two-way power switch Q 1An end and diode D 1Negative electrode link to each other two-way power switch Q 1The other end and capacitor C 2An end link to each other the switching tube S of the anti-and diode of band 2The switching tube S of output and diode anti-with band 3Input link to each other and be the level output end of corresponding phase, band is the switching tube S of diode also instead 3The switching tube S of output and diode anti-with band 4Input, two-way power switch Q 2An end and diode D 2Anode link to each other two-way power switch Q 2The other end and capacitor C 4An end link to each other the switching tube S of the anti-and diode of band 4Output and capacitor C 4The other end link to each other diode D 1Anode and diode D 2Negative electrode and capacitor C 3An end link to each other, the anti-and switching tube of diode of described band and the control end of two-way power switch all receive the switch controlling signal that external equipment provides.
6. three-phase five level current transformers with two-way power switch according to claim 5 is characterized in that: described band switching tube anti-and diode adopts IGBT.
7. three-phase five level current transformers with two-way power switch according to claim 5, it is characterized in that: described two-way power switch is made up of two IGBT; Wherein, The current collection of the one IGBT is an end of two-way power switch very; The emitter of the one IGBT links to each other with the emitter of the 2nd IGBT, and the current collection of the 2nd IGBT is the other end of two-way power switch very, and the gate pole of the gate pole of an IGBT and the 2nd IGBT is two control ends of two-way power switch.
8. three-phase five level current transformers with two-way power switch according to claim 5, it is characterized in that: described two-way power switch is made up of two switching tubes; Wherein, The input of first switching tube links to each other with the output of second switch pipe and is an end of two-way power switch; First output end of switching tube links to each other with the input of second switch pipe and is that the other end of two-way power switch, the control end of first control end of switching tube and second switch pipe are two control ends of two-way power switch.
CN2012101597294A 2012-05-18 2012-05-18 Five-level current transformation topological structure with bi-directional power switch and applications thereof Pending CN102664546A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN2012101597294A CN102664546A (en) 2012-05-18 2012-05-18 Five-level current transformation topological structure with bi-directional power switch and applications thereof

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN2012101597294A CN102664546A (en) 2012-05-18 2012-05-18 Five-level current transformation topological structure with bi-directional power switch and applications thereof

Publications (1)

Publication Number Publication Date
CN102664546A true CN102664546A (en) 2012-09-12

Family

ID=46773982

Family Applications (1)

Application Number Title Priority Date Filing Date
CN2012101597294A Pending CN102664546A (en) 2012-05-18 2012-05-18 Five-level current transformation topological structure with bi-directional power switch and applications thereof

Country Status (1)

Country Link
CN (1) CN102664546A (en)

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103023366A (en) * 2012-11-19 2013-04-03 南京理工大学 Half-bridge five-electrical-level inverter and high-frequency insulation-type half-bridge five-electrical-level inverter
FR3022090A1 (en) * 2014-06-04 2015-12-11 Bosch Gmbh Robert INVERTER CIRCUIT AND ITS MANAGEMENT METHOD
CN105703646A (en) * 2014-08-22 2016-06-22 特变电工新疆新能源股份有限公司 Inversion unit, control method thereof and inverter
CN108964494A (en) * 2018-10-08 2018-12-07 江苏师范大学 It is a kind of to press five-level voltage source type conversion device and control method certainly
CN111064378A (en) * 2020-01-10 2020-04-24 中国电力科学研究院有限公司 Five-level hybrid neutral point clamped converter
CN115313890A (en) * 2022-07-14 2022-11-08 江苏科曜能源科技有限公司 Single-phase active clamping T-type 17-level inverter
CN116155124A (en) * 2023-04-19 2023-05-23 湖南大学 Three-phase five-level inverter
EP4362312A1 (en) * 2022-10-27 2024-05-01 Akademia Gorniczo-Hutnicza im. Stanislawa Staszica w Krakowie Multilevel single-phase diode-clamped voltage inverter having a minimized number of transistors
EP4362313A1 (en) * 2022-10-27 2024-05-01 Akademia Gorniczo-Hutnicza im. Stanislawa Staszica w Krakowie Multilevel diode-clamped voltage inverter with a minimized number of transistors

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5684688A (en) * 1996-06-24 1997-11-04 Reliance Electric Industrial Company Soft switching three-level inverter
JP2010246267A (en) * 2009-04-06 2010-10-28 Fuji Electric Systems Co Ltd Five-level inverter
US20110110136A1 (en) * 2009-11-06 2011-05-12 Mge Ups Converter device comprising at least five DC voltage levels and uninterruptible power supply provided with said device
CN202586797U (en) * 2012-05-18 2012-12-05 浙江大学 Five-level variable-current topological structure with bidirectional power switches and application thereof

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US5684688A (en) * 1996-06-24 1997-11-04 Reliance Electric Industrial Company Soft switching three-level inverter
JP2010246267A (en) * 2009-04-06 2010-10-28 Fuji Electric Systems Co Ltd Five-level inverter
US20110110136A1 (en) * 2009-11-06 2011-05-12 Mge Ups Converter device comprising at least five DC voltage levels and uninterruptible power supply provided with said device
CN202586797U (en) * 2012-05-18 2012-12-05 浙江大学 Five-level variable-current topological structure with bidirectional power switches and application thereof

Cited By (9)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN103023366A (en) * 2012-11-19 2013-04-03 南京理工大学 Half-bridge five-electrical-level inverter and high-frequency insulation-type half-bridge five-electrical-level inverter
FR3022090A1 (en) * 2014-06-04 2015-12-11 Bosch Gmbh Robert INVERTER CIRCUIT AND ITS MANAGEMENT METHOD
CN105703646A (en) * 2014-08-22 2016-06-22 特变电工新疆新能源股份有限公司 Inversion unit, control method thereof and inverter
CN108964494A (en) * 2018-10-08 2018-12-07 江苏师范大学 It is a kind of to press five-level voltage source type conversion device and control method certainly
CN111064378A (en) * 2020-01-10 2020-04-24 中国电力科学研究院有限公司 Five-level hybrid neutral point clamped converter
CN115313890A (en) * 2022-07-14 2022-11-08 江苏科曜能源科技有限公司 Single-phase active clamping T-type 17-level inverter
EP4362312A1 (en) * 2022-10-27 2024-05-01 Akademia Gorniczo-Hutnicza im. Stanislawa Staszica w Krakowie Multilevel single-phase diode-clamped voltage inverter having a minimized number of transistors
EP4362313A1 (en) * 2022-10-27 2024-05-01 Akademia Gorniczo-Hutnicza im. Stanislawa Staszica w Krakowie Multilevel diode-clamped voltage inverter with a minimized number of transistors
CN116155124A (en) * 2023-04-19 2023-05-23 湖南大学 Three-phase five-level inverter

Similar Documents

Publication Publication Date Title
CN103441691B (en) A kind of mode of resonance electronic power convertor and converter device
CN102664546A (en) Five-level current transformation topological structure with bi-directional power switch and applications thereof
CN202586797U (en) Five-level variable-current topological structure with bidirectional power switches and application thereof
CN101546964B (en) Module combined multi-level converter
CN102624258B (en) Non-isolated symmetric self-coupling 18-pulse rectification power supply system
CN103516230B (en) Many level that bi-directional current controls balance solid-state transformer and its implementation mutually
CN107204626A (en) A kind of LCC MMC interlock hybrid bypolar DC transmission system
CN103001242B (en) A kind of HVDC based on modularization multi-level converter holds concurrently UPFC system
CN103427657B (en) A kind of high-voltage DC-DC conversion device
CN101534063B (en) Cascade connection polyphase converter
CN103715930B (en) A kind of method promoting flexible direct current power transmission system capacity
CN102185480B (en) Bidirectional isolation direct-current converter
CN104638940A (en) Modular multi-level power electronic transformer based on cascading
CN111064378B (en) Five-level hybrid neutral point clamped converter
CN104601003A (en) Power electronic transformer based on modular multilevel converter
CN103427658A (en) High-voltage DC-DC conversion device based on multi-winding transformer
CN107888073B (en) Alternating current-direct current hybrid energy router of all-round soft switch
EP3157120B1 (en) Modular multi-level flexible direct-current topology circuit suitable for fault ride-through
CN103441676A (en) Modularized device for conversion between high-voltage direct current and direct current
CN103236693B (en) Unified electric energy quality controller
CN102983586B (en) A kind of HVDC based on three-level voltage source converter holds concurrently UPFC system
CN203278664U (en) Three-level explosion-proof frequency converter
CN103166478B (en) A kind of high-tension integral gate change transistor five level power cabinet
CN204696955U (en) A kind of photovoltaic DC-to-AC converter adopting transformer auxiliary resonance
CN203387196U (en) Topological structure used for ultra-high voltage ultra-large capacity flexible direct current transmission system

Legal Events

Date Code Title Description
C06 Publication
PB01 Publication
C10 Entry into substantive examination
SE01 Entry into force of request for substantive examination
WD01 Invention patent application deemed withdrawn after publication

Application publication date: 20120912