CN107370391B - Bridge arm towards mesohigh intelligent distribution network is multiplexed electric power electric transformer - Google Patents
Bridge arm towards mesohigh intelligent distribution network is multiplexed electric power electric transformer Download PDFInfo
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- CN107370391B CN107370391B CN201710541940.5A CN201710541940A CN107370391B CN 107370391 B CN107370391 B CN 107370391B CN 201710541940 A CN201710541940 A CN 201710541940A CN 107370391 B CN107370391 B CN 107370391B
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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
- H02M5/00—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases
- H02M5/40—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc
- H02M5/42—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters
- H02M5/44—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac
- H02M5/453—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal
- H02M5/458—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M5/4585—Conversion of ac power input into ac power output, e.g. for change of voltage, for change of frequency, for change of number of phases with intermediate conversion into dc by static converters using discharge tubes or semiconductor devices to convert the intermediate dc into ac using devices of a triode or transistor type requiring continuous application of a control signal using semiconductor devices only having a rectifier with controlled elements
-
- 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
- H02M1/14—Arrangements for reducing ripples from dc input or output
-
- 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
- H02M1/32—Means for protecting converters other than automatic disconnection
-
- 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
- H02M3/00—Conversion of dc power input into dc power output
- H02M3/22—Conversion of dc power input into dc power output with intermediate conversion into ac
- H02M3/24—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters
- H02M3/28—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac
- H02M3/325—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal
- H02M3/335—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only
- H02M3/33569—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements
- H02M3/33576—Conversion of dc power input into dc power output with intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode to produce the intermediate ac using devices of a triode or a transistor type requiring continuous application of a control signal using semiconductor devices only having several active switching elements having at least one active switching element at the secondary side of an isolation transformer
-
- 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
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc 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
- H02M7/217—Conversion of ac power input into dc 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
- H02M7/219—Conversion of ac power input into dc 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 in a bridge configuration
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02M—APPARATUS FOR CONVERSION BETWEEN AC AND AC, BETWEEN AC AND DC, OR BETWEEN DC AND DC, AND FOR USE WITH MAINS OR SIMILAR POWER SUPPLY SYSTEMS; CONVERSION OF DC OR AC INPUT POWER INTO SURGE OUTPUT POWER; CONTROL OR REGULATION THEREOF
- H02M1/00—Details of apparatus for conversion
- H02M1/0067—Converter structures employing plural converter units, other than for parallel operation of the units on a single load
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention discloses a kind of, and the bridge arm towards mesohigh intelligent distribution network is multiplexed electric power electric transformer, including modular multi-level converter, input series and output parallel isolation type DC-DC converter and current transformer；The intermediate point of the previous bridge arm of input side inverter bridge of anode first isolation type DC-DC converter module of connection of modular multi-level converter output, cathode connect the input capacitance negative terminal of the last one isolation type DC-DC converter module；The connection type of two neighboring isolation type DC-DC converter module is the intermediate point that the input capacitance negative terminal of previous module connects the previous bridge arm of inverter bridge of latter module；Capacitor bridge arm of the bridge arm that the input capacitance of isolation type DC-DC converter is connected in series as upper level modular multi-level converter, front and back stages share a capacitor bridge arm.MMC shares one group of capacitor bridge arm with isolation type DC-DC converter in the present invention, reduces system cost；Can be to avoid in the case where MMC module output voltage be short-circuit, the problem of ISOP input capacitance short circuit.
Description
Technical field
The present invention relates to a kind of electric power electric transformer more particularly to a kind of bridge arm towards mesohigh intelligent distribution network are multiple
Use electric power electric transformer.
Background technique
The popularization and application of smart grid and its relevant technologies it is strong pushed China in the energy conservation of energy field, promote wind
The renewable energy such as energy solar energy are generated electricity by way of merging two or more grid systems, and develop the following power grid towards more intelligent, flexible, interaction direction.And
The objectives and function of the following smart grid, such as high power supply quality, convenient for renewable energy power generation access function can be real
It is existing, it is heavily dependent on the performance and intelligent level of electrical equipment in power grid.
Distribution transformer is most important in power distribution network and the most common a kind of equipment of application, effect be usually by 6~
The distribution voltage of 35kV is down to 400V or so output to user.The annual output of China's distribution transformer is up to 50,000,000 kVA or so, about
Account for the 1/3 of the total annual output of transformer.Therefore, the technical performance and economic indicator of distribution transformer can all directly affect the following intelligence
The power quality and intelligence degree of power grid.However, traditional distribution transformer and smart grid is intelligent, compatible, high
There is a big difference for the requirement such as power supply quality.
In this context, the electric power electric transformer functions such as electrical isolation, voltage transformation, reactive compensation to be rolled into one
As the important equipment for carrying out integrated optimization to traditional transformer and power electronic equipment, improving grid equipment intelligent level.
CAS Electrical Engineering Research Institute proposes a kind of structure of novel electric power electric transformer, and the transformer is by height
The modular multi-level converter (modular multilevel converter, MMC) of pressure exchange side, intermediate input series connection are defeated
Four bridge of three-phase of (input series output parallel, ISOP) isolation type DC-DC converter and low-pressure side in parallel out
Arm inverter is constituted.But ISOP isolation type DC-DC converter system input is directly concatenated using capacitor in this transformer
Method is by the method that each module is connected to realize the series connection of input terminal, and such method is in the output voltage short circuit of MMC module
When will lead to all derided capacitors together short circuit so that component can be burnt out.
Summary of the invention
Goal of the invention: in view of the above problems, the present invention proposes a kind of bridge arm multiplexing electricity towards mesohigh intelligent distribution network
Power electronic transformer, ISOP isolation type DC-DC converter input terminal uses the connection mode of new intermodule, defeated in MMC module
Capacitance short-circuit problem is avoided when voltage short circuit out；Structure of the MMC module using two bridge arms upper one group of capacitor bridge arm in parallel, capacitance bridge
The input capacitance of arm and the ISOP isolation type DC-DC converter of rear class shares, and reduces the use of equipment, reduces system cost.
Technical solution: to achieve the purpose of the present invention, the technical scheme adopted by the invention is that: one kind is towards mesohigh intelligence
Can the bridge arm of power distribution network be multiplexed electric power electric transformer, including being located on high-tension side modular multi-level converter, medial side
The current transformer of input series and output parallel isolation type DC-DC converter and low-pressure side；Modular multi-level converter is used for three
Intersection rheology changes high voltage direct current into；Isolation type DC-DC converter is used for the high voltage direct current for obtaining modular multi-level converter
It is transformed into low-voltage direct；Current transformer is used to for low-voltage direct being transformed into the electric current that load needs；Modular multi-level converter is defeated
The intermediate point of the previous bridge arm of input side inverter bridge of anode first isolation type DC-DC converter module of connection out, cathode connect
Connect the input capacitance negative terminal of the last one isolation type DC-DC converter module；Two neighboring isolation type DC-DC converter module
Connection type is the intermediate point that the input capacitance negative terminal of previous module connects the previous bridge arm of inverter bridge of latter module；Input series connection
The bridge arm that the input capacitance of output-parallel isolation type DC-DC converter is connected in series is as upper level modular multi-level converter
Capacitor bridge arm, front and back stages share a capacitor bridge arm.
Further, low-pressure side is three-phase four-leg inverter, and three-phase four-leg inverter is for low-voltage direct to be transformed into
Three-phase and four-line exchange.
A kind of bridge arm multiplexing electric power electric transformer towards mesohigh intelligent distribution network, including it is located on high-tension side module
Change Multilevel Inverters, the input series and output parallel isolation type DC-DC converter of medial side and the load of low-pressure side；Modularization
Multilevel Inverters are used to three-phase alternating current being transformed into high voltage direct current；Isolation type DC-DC converter is used for modular multilevel
The high voltage direct current that current transformer obtains is transformed into low-voltage direct；First isolation of anode connection of modular multi-level converter output
The intermediate point of the previous bridge arm of input side inverter bridge of type DC-DC convertor module, cathode connect the last one isolated form DC-DC change
The input capacitance negative terminal of parallel operation module；The connection type of two neighboring isolation type DC-DC converter module is the defeated of previous module
Enter the intermediate point that capacitor negative terminal connects the previous bridge arm of inverter bridge of latter module；Input series and output parallel isolated form DC-DC becomes
Capacitor bridge arm of the bridge arm that the input capacitance of parallel operation is connected in series as upper level modular multi-level converter, front and back stages are total
With a capacitor bridge arm.
The utility model has the advantages that compared with the existing technology, the present invention has the advantage that MMC converter is with ISOP isolated form DC-DC
Converter shares one group of capacitor bridge arm, reduces the use of equipment, reduces system cost；It can be exported to avoid in MMC module
In the case where voltage short circuit, the problem of ISOP input capacitance short circuit；ISOP intermodule uses the regulative mode of Interleaved control, so that
Input current ripple reduces, and advantageously reduces system bulk；Cost is relatively low, promotes and applies convenient for further.
Detailed description of the invention
Fig. 1 is electric power electric transformer main circuit schematic diagram of the present invention；
Fig. 2 is control strategy of the modular multi-level converter with Scott-T transformer；
Fig. 3 is the Direct control strategy of modular multi-level converter；
Fig. 4 is that a kind of topology of electric power electric transformer of the present invention extends.
Specific embodiment
Further description of the technical solution of the present invention with reference to the accompanying drawings and examples.
Be as shown in Figure 1 electric power electric transformer of the present invention (power electronic transformer,
PET) main circuit schematic diagram, modular multi-level converter (the modular multilevel including high-voltage alternating side
Converter, MMC), intermediate input connect output-parallel (input series output parallel, ISOP) isolated form
The three-phase four-leg inverter of DC-DC converter and low-pressure side.
The effect of modular multi-level converter is that on high-tension side three-phase alternating voltage is changing into high voltage direct current udcH.By
Power module is to be connected in series in MMC, convenient for the expansion of different voltages grade.Intermediate ISOP isolation type DC-DC converter
It is the high-voltage dc voltage u for converting MMCdcHIt is transformed into low pressure udcL, for the use of low-pressure side three-phase inverter.Meanwhile
Intermediate DC-DC converter also achieves the electrical isolation of high-pressure side and low-pressure side.
The inverter of low-pressure side is by low-pressure side DC voltage udcLInversion is alternating voltage, with for users to use.If low
Pressure side only needs single-phase alternating current or only needs direct current, then can replace with the three-phase four-leg inverter of low-pressure side accordingly
The current transformer or DC load of function.
The MMC module of high-voltage alternating side and same as the prior art do not do of inverter module of low-pressure side change, intermediate
The input terminal of ISOP isolation type DC-DC converter uses a kind of new series system, modular multi-level converter output
The intermediate point of the previous bridge arm of input side inverter bridge of anode first isolation type DC-DC converter module of connection, cathode connect most
The input capacitance negative terminal of the latter isolation type DC-DC converter module；The connection of two neighboring isolation type DC-DC converter module
Mode is the intermediate point A that the input capacitance negative terminal of previous module connects the previous bridge arm of inverter bridge of latter module, can effectively be avoided
In upper level voltage short circuit the problem of input capacitance dead short.
Meanwhile the bridge arm that the input capacitance of ISOP isolation type DC-DC converter is connected in series is as upper level MMC module
Capacitor bridge arm, front and back stages share a capacitor bridge arm, save the use of equipment, reduce system cost.
Three modules are specifically analyzed below.
The modular multi-level converter module of high-voltage alternating side is using two switching tube bridge arm shunt capacitance bridge arms
Topological structure, there are two types of control modes.It is the control strategy with Scott-T transformer as shown in Figure 2, two switching tube bridge arms produce
The two-phase output voltage of raw 90 ° of phase differences, then this two-phase voltage generates 120 ° of phase differences of three-phase by Scott-T transformer
Three-phase output voltage.It is the mode that directly controls as shown in Figure 3, each corresponding voltage and phase diagram by figure as shown, known defeated
In the case that outlet does not have AC transformer, three-phase alternating current only can be generated with two switching tube bridge arms.Wherein, two are connected
To the midpoint of switching tube bridge arm, in addition a midpoint for being connected to capacitor bridge arm, obtains three-phase output voltage.
The DC-DC converter of intermediate multiple isolated forms has the dual H-bridge of series resonance to constitute, and power can be with bidirectional flow
It is dynamic.Using the connection type of input series and output parallel, on high-tension side each converter passes through the low pressure top-cross being connected in parallel
Transducing amount, thus it is able to achieve high pressure lateral capacitance CHWith low pressure lateral capacitance CLThe automatic equalization of upper DC voltage.In addition, using series connection
Resonance circuit realizes that all IGBT are in Zero Current Switch (ZCS) state, can reduce system loss.In addition, due to input terminal
Series system and indirect series connection, but the previous bridge arm of inverter bridge that previous module input capacitance negative terminal is connected to latter module
Intermediate point can effectively avoid the problem that the input capacitance dead short in upper level voltage short circuit.Under such topology, using accounting for
For sky than the permanent control mode for being 50%, the voltage that input capacitance both ends are born is 2 times that each module bears average voltage.
DC-DC converter is by the way of opened loop control, i.e., the high pressure of transformer is surveyed and low-pressure side voltage is the side of duty ratio 50%
Wave, and phase is identical, i.e., the modulation system of the H bridge of high voltage side of transformer and low-pressure side is bipolar modulation.
Low pressure side inverter uses corresponding inverter or current transformer according to the demand of user.
In addition to this, in intergrade cascaded sections, this system can also be done in terms of topology further to be extended, for example,
Original full bridge structure could alternatively be three-level structure, such as Fig. 4.In addition, the series resonance electricity that cascaded sections use herein
Road is also directly that can operate normally with DAB structure, and protection scope of the present invention should belong in this.
The above is only a preferred embodiment of the present invention, it should be pointed out that: for the ordinary skill people of the art
For member, various improvements and modifications may be made without departing from the principle of the present invention, these improvements and modifications are also answered
It is considered as protection scope of the present invention.
Claims (4)
1. a kind of bridge arm towards mesohigh intelligent distribution network is multiplexed electric power electric transformer, it is characterised in that: including being located at height
Press the modular multi-level converter of side, the input series and output parallel isolation type DC-DC converter of medial side and low-pressure side
Current transformer；
Wherein, modular multi-level converter is used to three-phase alternating current being transformed into high voltage direct current；Isolation type DC-DC converter is used for
The high voltage direct current that modular multi-level converter is obtained is transformed into low-voltage direct；Current transformer is negative for low-voltage direct to be transformed into
Carry the electric current needed；
The input side inverter bridge of anode first isolation type DC-DC converter module of connection of modular multi-level converter output
The intermediate point of preceding bridge arm, cathode connect the input capacitance negative terminal of the last one isolation type DC-DC converter module；It is two neighboring every
The connection type of release DC-DC convertor module is that the input capacitance negative terminal of previous module connects bridge before the inverter bridge of latter module
The intermediate point of arm；
The inverter bridge of isolation type DC-DC converter module includes preceding bridge arm and rear bridge arm.
2. the bridge arm according to claim 1 towards mesohigh intelligent distribution network is multiplexed electric power electric transformer, feature
Be: the input series and output parallel isolated form DC-DC including being located on high-tension side modular multi-level converter, medial side becomes
The three-phase four-leg inverter of parallel operation and low-pressure side；
Wherein, modular multi-level converter is used to three-phase alternating current being transformed into high voltage direct current；Isolation type DC-DC converter is used for
The high voltage direct current that modular multi-level converter is obtained is transformed into low-voltage direct；Three-phase four-leg inverter is used for low-pressure direct
Rheology changes three-phase and four-line exchange into.
3. the bridge arm according to claim 1 or 2 towards mesohigh intelligent distribution network is multiplexed electric power electric transformer, special
Sign is: input series and output parallel isolation type DC-DC converter and modular multi-level converter share a capacitor bridge arm.
4. a kind of bridge arm towards mesohigh intelligent distribution network is multiplexed electric power electric transformer, it is characterised in that: including being located at height
Press the modular multi-level converter of side, the input series and output parallel isolation type DC-DC converter of medial side and low-pressure side
Load；
Wherein, modular multi-level converter is used to three-phase alternating current being transformed into high voltage direct current；Isolation type DC-DC converter is used for
The high voltage direct current that modular multi-level converter is obtained is transformed into low-voltage direct；
The input side inverter bridge of anode first isolation type DC-DC converter module of connection of modular multi-level converter output
The intermediate point of preceding bridge arm, cathode connect the input capacitance negative terminal of the last one isolation type DC-DC converter module；It is two neighboring every
The connection type of release DC-DC convertor module is that the input capacitance negative terminal of previous module connects bridge before the inverter bridge of latter module
The intermediate point of arm；
The inverter bridge of isolation type DC-DC converter module includes preceding bridge arm and rear bridge arm；
The bridge arm that the input capacitance of input series and output parallel isolation type DC-DC converter is connected in series is as upper level modularization
The capacitor bridge arm of Multilevel Inverters, front and back stages share a capacitor bridge arm.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201710541940.5A CN107370391B (en) | 2017-07-05 | 2017-07-05 | Bridge arm towards mesohigh intelligent distribution network is multiplexed electric power electric transformer |
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| CN201710541940.5A CN107370391B (en) | 2017-07-05 | 2017-07-05 | Bridge arm towards mesohigh intelligent distribution network is multiplexed electric power electric transformer |
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| CN107370391A CN107370391A (en) | 2017-11-21 |
| CN107370391B true CN107370391B (en) | 2019-05-28 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109039081B (en) * | 2018-06-20 | 2021-01-01 | 中国科学院电工研究所 | Power electronic transformer, bidirectional direct current converter and control method thereof |
| JP7275667B2 (en) * | 2019-03-05 | 2023-05-18 | Tdk株式会社 | switching power supply |
| CN110690828A (en) * | 2019-09-09 | 2020-01-14 | 中国科学院电工研究所 | Single-phase AC/DC power electronic transformer |
| CN113014081B (en) * | 2019-12-20 | 2022-08-09 | 新疆金风科技股份有限公司 | Self-starting circuit and starting method of direct-current energy-taking power supply |
| CN111697837B (en) * | 2020-05-18 | 2021-08-27 | 西安许继电力电子技术有限公司 | Direct-current transformer topology based on three-level CLLLC resonant converter and control method |
| CN111711347B (en) * | 2020-05-22 | 2021-11-05 | 国网江苏省电力有限公司电力科学研究院 | Hybrid isolation type power electronic transformer |
| CN112491157B (en) * | 2020-11-13 | 2021-10-08 | 哈尔滨工业大学 | Dynamic wireless power supply equipment multi-receiving-end module SIPO circuit topology control method |
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| EP2566030A3 (en) * | 2011-08-29 | 2014-12-10 | General Electric Company | Power conversion system and method |
| CN104283233A (en) * | 2014-10-18 | 2015-01-14 | 国家电网公司 | Flexible DC power transmission system |
| CN105119508A (en) * | 2015-09-18 | 2015-12-02 | 山东建筑大学 | Modularized multi-level current converter with hybrid-cascaded full-bridge and half-bridge sub-modules and starting method thereof |
| JP2016174490A (en) * | 2015-03-17 | 2016-09-29 | 株式会社東芝 | Electric power conversion system |
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| EP2566030A3 (en) * | 2011-08-29 | 2014-12-10 | General Electric Company | Power conversion system and method |
| CN104283233A (en) * | 2014-10-18 | 2015-01-14 | 国家电网公司 | Flexible DC power transmission system |
| JP2016174490A (en) * | 2015-03-17 | 2016-09-29 | 株式会社東芝 | Electric power conversion system |
| CN105119508A (en) * | 2015-09-18 | 2015-12-02 | 山东建筑大学 | Modularized multi-level current converter with hybrid-cascaded full-bridge and half-bridge sub-modules and starting method thereof |
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