CN107370391A - 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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- CN107370391A CN107370391A CN201710541940.5A CN201710541940A CN107370391A CN 107370391 A CN107370391 A CN 107370391A CN 201710541940 A CN201710541940 A CN 201710541940A CN 107370391 A CN107370391 A CN 107370391A
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- converter
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- isolation type
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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 bridge arm towards mesohigh intelligent distribution network to be multiplexed electric power electric transformer, including modular multi-level converter, input series and output parallel isolated form DC DC converters and current transformer；The positive pole of modular multi-level converter output connects the intermediate point of the previous bridge arm of input side inverter bridge of first isolated form DC DC converter module, and negative pole connects the input capacitance negative terminal of last isolated form DC DC converter modules；The connected mode of two neighboring isolated form DC DC converter modules connects the intermediate point of the previous bridge arm of inverter bridge of latter module for the input capacitance negative terminal of previous module；Electric capacity bridge arm of the bridge arm that the input capacitance of isolated form DC DC converters is in series as upper level modular multi-level converter, front and back stages share an electric capacity bridge arm.MMC shares one group of electric capacity bridge arm with isolated form DC DC converters in the present invention, reduces system cost；It can avoid in the case of MMC module output voltage short circuits, the problem of ISOP input capacitance short circuits.
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 to answer
Use electric power electric transformer.
Background technology
The popularization and application of intelligent grid and its correlation technique it is strong promoted China to promote wind in the energy-conservation of energy field
The regenerative resources such as energy solar energy are generated electricity by way of merging two or more grid systems, and following power network is developed towards more intelligent, flexibly, interactive direction.And
The objectives and function of following intelligent grid, such as high power supply quality, it is easy to 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 network.
Distribution transformer is most important in power distribution network and applies a most common kind equipment, its act on be usually by 6~
35kV distribution voltage is down to 400V or so and exported to user.The annual production of China's distribution transformer is up to 50,000,000 kVA or so, about
Account for the 1/3 of the total annual production of transformer.Therefore, the technical performance of distribution transformer and economic indicator can all directly affect following intelligence
The power quality and intelligence degree of power network.However, traditional distribution transformer and intelligent 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-load compensation to be rolled into one
As to traditional transformer and power electronic equipment progress integrated optimization, the visual plant for improving grid equipment intelligent level.
CAS Electrical Engineering Research Institute proposes a kind of structure of new electric power electric transformer, and the transformer is by height
Press modular multi-level converter (modular multilevel converter, MMC), the intermediate input series connection of AC defeated
Go out (input series output parallel, ISOP) isolation type DC-DC converter in parallel and the bridge of three-phase four of low-pressure side
Arm inverter is formed.But ISOP isolation type DC-DC converters system input uses what electric capacity was directly connected in this transformer
Method is by method that each module is connected so as to realize the series connection of input, and such a method is in the short circuit of MMC modules output voltage
When can cause all derided capacitors together short circuit so that component can be burnt out.
The content of the invention
Goal of the invention：For problem above, the present invention proposes that a kind of bridge arm towards mesohigh intelligent distribution network is multiplexed electricity
Power electronic transformer, ISOP isolation type DC-DC converters input uses the connection mode of new intermodule, defeated in MMC modules
Capacitance short-circuit problem is avoided when going out voltage short circuit；MMC modules are using the structure of two bridge arms upper one group of electric capacity bridge arm in parallel, capacitance bridge
The input capacitance of arm and the ISOP isolation type DC-DC converters of rear class shares, and reduces the use of equipment, reduces system cost.
Technical scheme：To realize the purpose of the present invention, the technical solution adopted in the present invention is：It is a kind of towards mesohigh intelligence
Can power distribution network bridge arm multiplexing electric power electric transformer, including positioned 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
Cross streams are transformed into HVDC；Isolation type DC-DC converter is used for the HVDC for obtaining modular multi-level converter
It is transformed into low-voltage direct；Current transformer is used for the electric current that low-voltage direct is transformed into load and needed；Modular multi-level converter is defeated
The positive pole gone out connects the intermediate point of the previous bridge arm of input side inverter bridge of first isolation type DC-DC converter module, and negative pole connects
Connect the input capacitance negative terminal of last isolation type DC-DC converter module；Two neighboring isolation type DC-DC converter module
Connected mode connects the intermediate point of the previous bridge arm of inverter bridge of latter module for the input capacitance negative terminal of previous module；Input series connection
The bridge arm that the input capacitance of output-parallel isolation type DC-DC converter is in series is as upper level modular multi-level converter
Electric capacity bridge arm, front and back stages share an electric capacity bridge arm.
Further, low-pressure side is three-phase four-leg inverter, and three-phase four-leg inverter is used to low-voltage direct being transformed into
Three-phase and four-line exchanges.
A kind of bridge arm towards mesohigh intelligent distribution network is multiplexed electric power electric transformer, including positioned 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 HVDC；Isolation type DC-DC converter is used for modular multilevel
The HVDC that current transformer obtains is transformed into low-voltage direct；The positive pole of modular multi-level converter output connects first isolation
The intermediate point of the previous bridge arm of input side inverter bridge of type DC-DC convertor module, negative pole connect last isolated form DC-DC changes
The input capacitance negative terminal of parallel operation module；The connected mode of two neighboring isolation type DC-DC converter module is defeated for previous module
Enter the intermediate point that electric capacity negative terminal connects the previous bridge arm of inverter bridge of latter module；Input series and output parallel isolated form DC-DC becomes
Electric capacity bridge arm of the bridge arm that the input capacitance of parallel operation is in series as upper level modular multi-level converter, front and back stages are common
With an electric capacity bridge arm.
Beneficial effect：Relative to prior art, the invention has the advantages that：MMC converters are with ISOP isolated forms DC-DC
Converter shares one group of electric capacity bridge arm, reduces the use of equipment, reduces system cost；It can avoid exporting in MMC modules
In the case of voltage short circuit, the problem of ISOP input capacitance short circuits；ISOP intermodules use the regulative mode of Interleaved control so that
Input current ripple reduces, and advantageously reduces system bulk；Cost is relatively low, is easy to further popularization and application.
Brief description of the drawings
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 transformers；
Fig. 3 is the Direct control strategy of modular multi-level converter；
Fig. 4 is one kind topology extension of electric power electric transformer of the present invention.
Embodiment
Technical scheme is further described 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 of high-voltage alternating side are included
Converter, MMC), intermediate input series connection 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 HVDC udcH.By
Power model is easy to the expansion of different voltage class to be connected in series in MMC.Middle ISOP isolation type DC-DC converters
It is that MMC is converted into obtained high-voltage dc voltage udcHIt is transformed into low pressure udcL, so that low-pressure side three-phase inverter uses.Meanwhile
Middle 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.It is 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 modules of high-voltage alternating side and same as the prior art do not do of inverter module of low-pressure side change, middle
The input of ISOP isolation type DC-DC converters employs a kind of new series system, modular multi-level converter output
Positive pole connects the intermediate point of the previous bridge arm of input side inverter bridge of first isolation type DC-DC converter module, and negative pole connects 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 connects the intermediate point A of the previous bridge arm of inverter bridge of latter module for the input capacitance negative terminal of previous module, can effectively avoid
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 converters is in series is as upper level MMC modules
Electric capacity bridge arm, front and back stages share an electric capacity 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 kinds of control modes.It is the control strategy with Scott-T transformers as shown in Figure 2, two switching tube bridge arms produce
The two-phase output voltage of 90 ° of phase differences is given birth to, then this two-phase voltage passes through Scott-T transformers generation 120 ° of phase differences of three-phase
Three-phase output voltage.It is direct control mode as shown in Figure 3, each corresponding voltage and phase diagram by figure as illustrated, known defeated
Go out in the case of holding no AC transformer, only with two switching tube bridge arms with regard to three-phase alternating current can be produced.Wherein, two are connected
To the midpoint of switching tube bridge arm, a midpoint for being connected to electric capacity bridge arm, obtains three-phase output voltage in addition.
The dual H-bridge that the DC-DC converter of middle multiple isolated forms has series resonance is formed, and its power can be with bidirectional flow
It is dynamic.Using the connected mode of input series and output parallel, on high-tension side each converter passes through the low pressure top-cross that is connected in parallel
Transducing amount, thus high pressure lateral capacitance C can be realizedHWith low pressure lateral capacitance CLThe automatic equalization of upper DC voltage.In addition, using series connection
Resonance circuit, realize that all IGBT are in Zero Current Switch (ZCS) state, system loss can be reduced.Further, since input
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, the problem of effectively avoiding the input capacitance dead short in upper level voltage short circuit.Under such a 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 dutycycle 50%
Ripple, and phase is identical, i.e., the modulation system of the H bridges 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, in intergrade cascaded sections, this system can also be done in terms of topology further to be extended, such as,
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, being directly also with DAB structures can be with normal operation, and this should belong to protection scope of the present invention.
Described above is only the preferred embodiment of the present invention, it should be pointed out that：For the ordinary skill people of the art
For member, under the premise without departing from the principles of the invention, some improvements and modifications can also be made, these improvements and modifications also should
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 positioned 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 HVDC；Isolation type DC-DC converter is used for
The HVDC 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 positive pole of modular multi-level converter output connects the input side inverter bridge of first isolation type DC-DC converter module
The intermediate point of previous bridge arm, negative pole connect the input capacitance negative terminal of last isolation type DC-DC converter module；It is two neighboring
Before the connected mode of isolation type DC-DC converter module connects the inverter bridge of latter module for the input capacitance negative terminal of previous module
The intermediate point of one bridge arm.
2. the bridge arm according to claim 1 towards mesohigh intelligent distribution network is multiplexed electric power electric transformer, its feature
It is：Including the input series and output parallel isolated form DC-DC changes positioned on high-tension side modular multi-level converter, medial side
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 HVDC；Isolation type DC-DC converter is used for
The HVDC 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 electric power electric transformer according to claim 1 or 2 towards mesohigh intelligent distribution network, it is characterised in that：
How electric the bridge arm that the input capacitance of input series and output parallel isolation type DC-DC converter is in series is as upper level modularization
The electric capacity bridge arm of flat current transformer, front and back stages share an electric capacity 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 positioned 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 HVDC；Isolation type DC-DC converter is used for
The HVDC that modular multi-level converter is obtained is transformed into low-voltage direct；
The positive pole of modular multi-level converter output connects the input side inverter bridge of first isolation type DC-DC converter module
The intermediate point of previous bridge arm, negative pole connect the input capacitance negative terminal of last isolation type DC-DC converter module；It is two neighboring
Before the connected mode of isolation type DC-DC converter module connects the inverter bridge of latter module for the input capacitance negative terminal of previous module
The intermediate point of one bridge arm；
The bridge arm that the input capacitance of input series and output parallel isolation type DC-DC converter is in series is as upper level modularization
The electric capacity bridge arm of Multilevel Inverters, front and back stages share an electric capacity bridge arm.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| 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 true CN107370391A (en) | 2017-11-21 |
| CN107370391B CN107370391B (en) | 2019-05-28 |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109039081A (en) * | 2018-06-20 | 2018-12-18 | 中国科学院电工研究所 | Electric power electric transformer, two-way DC converter and its control method |
| 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 |
| CN111669054A (en) * | 2019-03-05 | 2020-09-15 | Tdk株式会社 | Switching power supply device |
| CN111697837A (en) * | 2020-05-18 | 2020-09-22 | 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 |
| CN111711347A (en) * | 2020-05-22 | 2020-09-25 | 国网江苏省电力有限公司电力科学研究院 | Hybrid isolation type power electronic transformer |
| CN112491157A (en) * | 2020-11-13 | 2021-03-12 | 哈尔滨工业大学 | Multi-module SIPO circuit topology and control method for receiving end of high-power dynamic wireless power supply system of electric automobile |
| CN113014081A (en) * | 2019-12-20 | 2021-06-22 | 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 |
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Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109039081A (en) * | 2018-06-20 | 2018-12-18 | 中国科学院电工研究所 | Electric power electric transformer, two-way DC converter and its control method |
| CN111669054A (en) * | 2019-03-05 | 2020-09-15 | Tdk株式会社 | Switching power supply device |
| CN111669054B (en) * | 2019-03-05 | 2023-12-26 | Tdk株式会社 | Switching power supply device |
| 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 |
| CN113014081A (en) * | 2019-12-20 | 2021-06-22 | 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 |
| CN111697837A (en) * | 2020-05-18 | 2020-09-22 | 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 |
| 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 |
| CN111711347A (en) * | 2020-05-22 | 2020-09-25 | 国网江苏省电力有限公司电力科学研究院 | Hybrid isolation type power electronic transformer |
| 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 |
| CN112491157A (en) * | 2020-11-13 | 2021-03-12 | 哈尔滨工业大学 | Multi-module SIPO circuit topology and control method for receiving end of high-power dynamic wireless power supply system of electric automobile |
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| Publication number | Publication date |
|---|---|
| CN107370391B (en) | 2019-05-28 |
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