CN106992546A - A kind of optimal energy allocation system of flexible direct current power distribution network - Google Patents
A kind of optimal energy allocation system of flexible direct current power distribution network Download PDFInfo
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- CN106992546A CN106992546A CN201710326470.0A CN201710326470A CN106992546A CN 106992546 A CN106992546 A CN 106992546A CN 201710326470 A CN201710326470 A CN 201710326470A CN 106992546 A CN106992546 A CN 106992546A
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- 230000005540 biological transmission Effects 0.000 claims description 9
- 230000009466 transformation Effects 0.000 claims description 6
- 230000003044 adaptive effect Effects 0.000 claims description 5
- 238000002955 isolation Methods 0.000 claims description 5
- 238000012544 monitoring process Methods 0.000 claims description 4
- 230000009471 action Effects 0.000 claims description 2
- 238000000034 method Methods 0.000 description 4
- 230000008901 benefit Effects 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000002452 interceptive effect Effects 0.000 description 2
- 230000002411 adverse Effects 0.000 description 1
- 239000012141 concentrate Substances 0.000 description 1
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- 230000007812 deficiency Effects 0.000 description 1
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Classifications
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- H02J3/383—
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- H02J3/386—
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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
- 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
- H02M3/33507—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 with automatic control of the output voltage or current, e.g. flyback converters
- H02M3/33523—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 with automatic control of the output voltage or current, e.g. flyback converters with galvanic isolation between input and output of both the power stage and the feedback loop
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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
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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
- 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
- H02M1/007—Plural converter units in cascade
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
- Y02E10/56—Power conversion systems, e.g. maximum power point trackers
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/70—Wind energy
- Y02E10/76—Power conversion electric or electronic aspects
Abstract
A kind of optimal energy allocation system of flexible direct current power distribution network, including input stage, intermediate isolating level, output stage.The input stage includes three-phase high frequency voltage source rectifier, stepping-up/stepping-down chopper circuit, for the DC power conversion that sends photovoltaic electroplax into can be directly accessed the voltage class of dc distribution network.Intermediate isolating level is made up of 2 H coupled with input stage types inverters, 2 original side's simplex winding, the medium/high frequency power transformer of the winding of pair side 4 and 4 H type single-phase rectifiers.The exchange electricity output of the output stage is made up of 3 Single-Phase Voltage-Source Inverters, and output end is connected into YN types, is formed three-phase and four-line output, is used for alternating current generator；Or the next HVDC Modulation of input stage is made into required direct current after the transformer coupled winding to pair side 1, used for DC loads such as the electric automobiles of user side into intermediate frequency square wave.The present invention can in real time improve according to distribution system running environment instantly, adjust the flowing of distribution line, voltage and power parameter.
Description
Technical field
The invention belongs to micro-capacitance sensor control field, and in particular to a kind of optimal energy allocation system of flexible direct current power distribution network
System, for improving the micro-capacitance sensor quality of power supply.
Background technology
With developing rapidly for the DC loads such as distributed energy, electric automobile, with conventional electric power after its large-scale grid connection
The conflict that system is produced is increasingly apparent, and DC distribution net arises at the historic moment, and with low-power consumption, low cost and the characteristics of self-organizing,
The fields such as ship, industry, household are widely used.The randomness exerted oneself due to distributed energy, electric automobile and not
Certainty, can still bring problems, such as to direct-flow distribution system：System loading forecasting problem, systems organization problem, system
Quality of voltage and stable problem, protection problem, electric power islanding problem etc..And China lacks distributed energy, electronic at this stage
Automobile is grid-connected and DC distribution net in terms of unified standard and relevant policies support that most of distributed energy is all in standby electricity
Source or independently-powered state, the Novel DC load such as electric automobile is all in small-scale independent operating.And on the other hand, it is various multiple
Miscellaneous, accurate, sensitive to quality of power supply electrical equipment is constantly popularized so that quality requirements more and more higher of the people to electric energy.Cause
And power distribution system quality of electric power control problem is always the focus of Recent study, finding out one kind can improve, lift power system
The method of distribution environment is extremely urgent.
The content of the invention
The invention aims to improve the deficiency that existing control method is present, for the large-scale distributed energy, electricity
The direct-flow distribution system of electrical automobile access provides a kind of adaptive power of flexible direct current power distribution network that can voluntarily adjust, improve
Control method.Realize that flowing for power electronics interface is adaptive, can be on the premise of load normal power supply be ensured, from source
Adaptively solve the problems, such as DC distribution network electric energy quality.Voltage Stability Level is improved, improves the quality of power supply, lift existing line
Efficiency of transmission, and realize the smooth unperturbed access of distributed energy, electric automobile.
The technical scheme that the present invention takes is：
A kind of optimal energy allocation system of flexible direct current power distribution network, including input stage, intermediate isolating level, output stage.
The input stage includes a three-phase high frequency voltage source rectifier, and the alternating current for blower fan to be sent is made into directly
Stream, realizes that input current is sinusoidal and input power factor is controllable；The input stage includes a stepping-up/stepping-down chopper circuit, for inciting somebody to action
The DC power conversion that photovoltaic electroplax is sent is into can be directly accessed the voltage class of dc distribution network.
Intermediate isolating level is by 2 H coupled with input stage types inverters, 2 original side's simplex winding, the winding of pair side 4
Medium/high frequency power transformer and 4 H types single-phase rectifiers are constituted, and the HVDC Modulation that intermediate isolating level carrys out input stage is into medium/high frequency side
Ripple, is loaded on medium/high frequency power transformer, after transformer buck, and in transformer secondary, high frequency square wave is through single-phase PWM full-bridge
Rectification circuit is by after being reduced to DC voltage, then industrial frequency AC needed for being transformed to through single-phase PWM full bridge inverter is exported；
The exchange electricity output of the output stage is made up of 3 Single-Phase Voltage-Source Inverters, and output end is connected into YN types, forms three
The line of phase four is exported, and is used for alternating current generator；Or the next HVDC Modulation of input stage is arrived into pair side into intermediate frequency square wave through transformer coupled
Required direct current is made into after 1 winding, is used for DC loads such as the electric automobiles of user side.
Use opened loop control by HVDC Modulation into dutycycle for 50% high frequency square wave, transformation is simultaneously coupled to high frequency transformer
The winding of pair side 3 after resynchronisation rectification be reduced into direct current.
D. c. voltage signal is modulated into medium/high frequency voltage signal by the intermediate isolating level input side；Intermediate isolating level is defeated
Go out side and medium/high frequency voltage signal be demodulated to d. c. voltage signal, intermediate isolating level be used to realizing voltage class conversion, electrically every
From, power transmission.
The control system sends power distribution network network parameter and operation working condition by control module to monitor terminal, simultaneously
Also the dispatch command that monitoring station is sent is received, therefore the control system can be operated in adaptive model and remote control mode, both of which
Can artificially it switch.
A kind of optimal energy allocation system of flexible direct current power distribution network of the present invention, advantage is：
The real-time of current utility power quality control device is poor, generally all there are problems that overcompensation or undercompensation, this Shen
Automatic adjusument Power Control please can improve, adjust the energy of distribution line in real time according to distribution system running environment instantly
Stream, voltage and power parameter.
Brief description of the drawings
Fig. 1 is control structure block diagram of the invention.
Fig. 2 is control main circuit structure of the invention.
Embodiment
The power electronic devices mainly applied in flexible direct current power distribution network be DC/DC converters, AC/DC converters in,
DC/AC converters, wherein, the photovoltaic generation in distributed energy is incorporated to direct current network by DC/DC converters, and wind turbine power generation leads to
Cross AC/DC converters and be incorporated to direct current network；A series of DC loads such as the electric automobile of user side are by DC/DC converters from straight
Electric energy is obtained in stream power network, AC load obtains electric energy by DC/AC converters from direct current network.Thus, can be by distribution wire
Line structure is designed asThis is that the optimal energy allocation system used in the present invention is used
Structure.
A kind of optimal energy allocation system of flexible direct current power distribution network, including input stage, intermediate isolating level, output stage three
Individual part.Input stage and output stage are mainly made up of switching device and filter unit, and intermediate isolating level input side is by DC voltage
Signal modulation is into medium/high frequency voltage signal；Intermediate frequency/or high-frequency voltage signal are demodulated to DC voltage by intermediate isolating level outlet side
Signal, intermediate isolating level is mainly used for realizing the functions such as voltage class conversion, electrical isolation and power transmission.
Control system of the present invention can also send power distribution network network parameter to monitor terminal by control module and run work
Make state, while the dispatch command of monitoring station transmission can also be received, therefore control system of the present invention can be operated in adaptive model
And remote control mode, both of which can artificially switch.Wherein, power controller can realize the two-way flow of power, or even realize
Power is interactive between multiport network, therefore does not have point of absolute high-pressure side and low-pressure side between input stage and output stage, high-pressure side and
The application of low-pressure side depends on the concrete application occasion of power controller.
Control system of the present invention will not only ensure that its pair side is supplied to the voltage constant and waveform of user side sinusoidal, but also
Input side current harmonics should be reduced as far as possible, reduce the harmonic pollution caused to power network.
In the main topological structure of control system of the present invention, input stage has a three-phase high frequency voltage source rectifier, not only may be used
To realize that input current is sinusoidal, but also it can realize that original side's input power factor is controllable.The industrial frequency AC input that blower fan is produced
Direct current is converted to through three-phase high frequency all controlled rectifier circuit, then is modulated into by a single-phase PWM full bridge inverter to be medium/high
Medium/high frequency power transformer is loaded onto after frequency square wave, after transformer buck, in transformer secondary, high frequency square wave is complete through single-phase PWM
Bridge rectification circuit is defeated by the industrial frequency AC after being reduced to DC voltage needed for being transformed to through single-phase PWM full bridge inverter
Go out, used for alternating current generator.Input stage also has a stepping-up/stepping-down chopper circuit (buck-boost chopper), and it is on the one hand by light
On the other hand the DC power conversion that volt electroplax is sent realizes input voltage into that can be directly accessed the voltage class of dc distribution network
Steadily less ripple.It is modulated into and is become to load tremendously high frequency after medium/high frequency square wave by a single-phase PWM full bridge inverter again
Depressor, is reduced into direct current after the transformer coupled winding to pair side 1, makes for DC loads such as the electric automobiles of user side
With.
Each phase output of converters can all produce harmonic wave, in the direct current of single-phase electricity potential source type PWM rectifier
Contain 2 subharmonic in side.Therefore there is also the pulsation of 2 double frequency voltage ripples in feedback signal, the signal is input to after adjuster, meeting
Make to contain 3 subharmonic compositions in the AC input current of rectifier.Wait strange due to there are input current closed loop, therefore 5,7 ... ...
Subharmonic can all occur in input current, in order to suppress the low-order harmonic near fundamental frequency.
More H type circuits are employed in control system main circuit diagram of the present invention：It is single-phase PWM full bridge inverter, single-phase
PWM full bridge rectifiers, to filter the multiple harmonic during circuit transformations, so as to reduce the shadow of low-frequency harmonics to greatest extent
Ring and improve the quality of power supply.The structural requirement high-pressure side power device has higher voltage class and needs series connection, it is possible to achieve defeated
Enter to hold PFC, while the two-way flow of harmonic wave can be suppressed.This scheme is as a result of integral transformation structure, institute
Conciser with structure, power device number of packages is relatively fewer.
Control system core of the present invention concentrates on intermediate isolating level and the part of output stage 2, and this two parts is done below
More introduce in detail：
First, intermediate isolating level control：
The major function of intermediate isolating level control has:Power transmission, voltage class conversion and electrical isolation.By main circuit knot
Structure analysis understands that the intergrade control of optimal energy allocation is in DC power distribution line, equivalent to DC/DC conversion modules.
Intergrade includes two kinds of mode of operations:Equivalent main circuit knot under positive trend pattern and reversal tidal current pattern, two kinds of mode of operations
Structure is essentially identical, and control strategy has duality,
Intermediate isolating level is needed the next HVDC Modulation of input stage into high-frequency square-wave signal, and is coupled to medium/high frequency transformation
After the secondary side of device, direct current signal is then reduced into.The effect of medium/high frequency power transformer has two:One is to realize former method, system and pair side
The isolation of system, two be to realize that voltage class is converted.In control system of the present invention using opened loop control by HVDC Modulation into duty
Than the high frequency square wave for 50%, transformation and be coupled to after the winding of the pair side of high frequency transformer 3 resynchronize rectification be reduced into direct current.
The advantage of this control mode is that control system is simple, and stationary problem is easily solved.
2nd, output stage is controlled：
The exchange electricity output target of output stage control, is no matter to be realized in the case of balanced load or asymmetric load
Phase voltage virtual value is constant and waveform is sinusoidal.Due to being that 3 single-phase inverters are combined into three-phase four-line dc-to-ac converter as output, institute
So that three-phase independent control can be realized, so that any phase load is adversely affected all without to other phases.Realizing three
It should ensure that three-phase output voltage amplitude is equal and phase is symmetrical during phase independent control, 120 ° differed each other., can be in output stage
A, b, c three-phase each treat by the independent single-phase inverter as a wave filter containing LC.When the switching frequency of inverter is long-range
When the frequency of modulating wave, inverter can be as a proportional component.
Fig. 1 is the optimal energy allocation structured flowchart of flexible direct current power distribution network, the specific steps of optimal energy allocation
It is as follows：It includes input stage, intermediate isolating level and 3 parts of output stage.Input stage and output stage are main by switching device and filter
Ripple device is constituted, and d. c. voltage signal is modulated into medium/high frequency voltage signal by intergrade input side；Intergrade outlet side will be medium/high
Frequency voltage signal is demodulated to d. c. voltage signal, and intergrade is mainly used for realizing voltage class conversion, electrical isolation and work(
The functions such as rate transmission.Control system of the present invention to monitor terminal can also send power distribution network network parameter and fortune by control module
Row working condition, while the dispatch command of monitoring station transmission can also be received, therefore control system of the present invention can be operated in adaptively
Pattern and remote control mode, both of which can artificially switch.Wherein, power controller can realize the two-way flow of power, even
Realize that power is interactive between multiport network, therefore there is no point of absolute high-pressure side and low-pressure side, high pressure between input stage and output stage
The application of side and low-pressure side depends on the concrete application occasion of power controller.
The optimal energy allocation main circuit structure of Fig. 2 flexible direct current power distribution networks.
Specifically, in the main topological structure of control system of the present invention, input stage has a three-phase high frequency voltage source rectifier,
On the one hand the alternating current that blower fan is sent is made into direct current by it, on the other hand realizes that input current is sinusoidal and input power factor can
Control；Input stage also has a stepping-up/stepping-down chopper circuit (buck-boost chopper), what on the one hand it sent photovoltaic electroplax
DC power conversion is into that can be directly accessed the voltage class of dc distribution network, and that on the other hand realizes input voltage steadily lacks line
Ripple.
Intermediate isolating level by 2 H coupled with input stage types inverters, 2 original side's simplex winding, the winding of pair side 4 it is medium/high
Frequency power transformer and 4 H types single-phase rectifiers are constituted.The next HVDC Modulation of input stage into medium/high frequency square wave, is loaded on by it
Medium/high frequency power transformer, after transformer buck, in transformer secondary, high frequency square wave is passed through through single-phase PWM full bridge rectifier
The industrial frequency AC needed for being transformed to through single-phase PWM full bridge inverter again after DC voltage is reduced to export.
It is to be specifically made into direct current respectively after the transformer coupled winding to pair side 3 in control system of the present invention.Output
The exchange electricity output of level is made up of 3 Single-Phase Voltage-Source Inverters, and output end is connected into YN types, three-phase and four-line output is formed, for handing over
Stream motor is used；Or the next HVDC Modulation of input stage is made into institute into intermediate frequency square wave after the transformer coupled winding to pair side 1
Direct current is needed, is used for DC loads such as the electric automobiles of user side.
Claims (4)
1. a kind of optimal energy allocation system of flexible direct current power distribution network, including input stage, intermediate isolating level, output stage, its
It is characterised by：The input stage includes a three-phase high frequency voltage source rectifier, and the alternating current for blower fan to be sent is made into directly
Stream, realizes that input current is sinusoidal and input power factor is controllable；The input stage includes a stepping-up/stepping-down chopper circuit, for inciting somebody to action
The DC power conversion that photovoltaic electroplax is sent is into can be directly accessed the voltage class of dc distribution network；
Intermediate isolating level by 2 H coupled with input stage types inverters, 2 original side's simplex winding, the winding of pair side 4 it is medium/high
Frequency power transformer and 4 H types single-phase rectifiers are constituted, and the HVDC Modulation that intermediate isolating level carrys out input stage is into medium/high frequency square wave, quilt
Medium/high frequency power transformer is loaded onto, after transformer buck, in transformer secondary, high frequency square wave is through single-phase PWM full-bridge rectification electricity
Road is by after being reduced to DC voltage, then industrial frequency AC needed for being transformed to through single-phase PWM full bridge inverter is exported；
The exchange electricity output of the output stage is made up of 3 Single-Phase Voltage-Source Inverters, and output end is connected into YN types, forms three-phase four
Line is exported, and is used for alternating current generator；Or the next HVDC Modulation of input stage is arrived into pair side 1 into intermediate frequency square wave through transformer coupled
Required direct current is made into after winding, is used for DC loads such as the electric automobiles of user side.
2. a kind of optimal energy allocation system of flexible direct current power distribution network according to claim 1, it is characterised in that：Using
Opened loop control is by HVDC Modulation into the high frequency square wave that dutycycle is 50%, transformation and the winding of pair side 3 for being coupled to high frequency transformer
Resynchronisation rectification afterwards is reduced into direct current.
3. a kind of optimal energy allocation system of flexible direct current power distribution network according to claim 1, it is characterised in that：It is described
D. c. voltage signal is modulated into medium/high frequency voltage signal by intermediate isolating level input side；Intermediate isolating level outlet side is by medium/high frequency
Voltage signal is demodulated to d. c. voltage signal, and intermediate isolating level is used to realize voltage class conversion, electrical isolation, power transmission.
4. a kind of optimal energy allocation system of flexible direct current power distribution network according to claim 1, it is characterised in that：The control
System processed sends power distribution network network parameter and operation working condition by control module to monitor terminal, while also receiving monitoring station
The dispatch command of transmission, the control system is operated in adaptive model and remote control mode, and both of which can artificially switch.
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| CN107732895A (en) * | 2017-11-07 | 2018-02-23 | 西南交通大学 | A kind of electric power electric transformer |
| CN109038593A (en) * | 2018-08-22 | 2018-12-18 | 苏州大学 | A kind of direct flow controller of 360 ° of synthesis types of phase and its working method |
| CN109104097A (en) * | 2018-08-30 | 2018-12-28 | 全球能源互联网研究院有限公司 | A kind of high frequency transformer operating test device |
| CN112953254A (en) * | 2021-03-29 | 2021-06-11 | 山东电工电气集团有限公司 | Three-phase power electronic transformer topology and control method thereof |
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| CN109038593A (en) * | 2018-08-22 | 2018-12-18 | 苏州大学 | A kind of direct flow controller of 360 ° of synthesis types of phase and its working method |
| CN109038593B (en) * | 2018-08-22 | 2023-09-01 | 苏州大学 | Phase 360-degree synthesized direct power flow controller and working method thereof |
| CN109104097A (en) * | 2018-08-30 | 2018-12-28 | 全球能源互联网研究院有限公司 | A kind of high frequency transformer operating test device |
| CN109104097B (en) * | 2018-08-30 | 2023-11-24 | 全球能源互联网研究院有限公司 | High-frequency transformer operation test device |
| CN112953254A (en) * | 2021-03-29 | 2021-06-11 | 山东电工电气集团有限公司 | Three-phase power electronic transformer topology and control method thereof |
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