CN108832825A - A kind of multiport electric power electric transformer topology of high power density - Google Patents
A kind of multiport electric power electric transformer topology of high power density Download PDFInfo
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- CN108832825A CN108832825A CN201810736782.3A CN201810736782A CN108832825A CN 108832825 A CN108832825 A CN 108832825A CN 201810736782 A CN201810736782 A CN 201810736782A CN 108832825 A CN108832825 A CN 108832825A
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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
- 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
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J5/00—Circuit arrangements for transfer of electric power between ac networks and dc networks
-
- 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
Abstract
The invention discloses a kind of multiport electric power electric transformer topologys of high power density, including on high-tension side modularization multi-level converter, the mode of resonance high-frequency converter of medial side and the DC bus of low-pressure side；The positive and negative direct current bus of modularization multi-level converter is connect with two blocking resonant capacitances of high-frequency converter respectively, and the ac bus of modularization multi-level converter is connected with the resonant capacitance that exchanges of high-frequency converter, to form two resonant tanks up and down；The upper and lower bridge arm of modularization multi-level converter exports reverse phase high-frequency ac, and energy is transferred to low-pressure side through resonant tank with high frequency regimes.Compared to the existing multiport electric power electric transformer for having high-voltage alternating, high voltage direct current and low-voltage direct bus concurrently, topology of the present invention can greatly reduce the quantity of high frequency transformer, submodule, capacitor and switching device, and it is not necessarily to the high frequency wave trap of DC bus, the volume and cost of device are greatly reduced, the efficiency and power density of device are improved.
Description
Technical field
The invention belongs to power electronics fields, and particularly a kind of multiport power electronics of high power density becomes
Depressor topology.
Background technique
Electric power electric transformer has the function of voltage transformation, reactive compensation, unbalance control, power quality controlling etc.
Power electronic equipment.Wherein, it with the multiport electric power electric transformer of high-voltage alternating, high voltage direct current and low-voltage direct, is applicable in
In alternating current-direct current mixing power grid, convenient for the access and consumption of renewable energy, it helps improve the operational efficiency of power grid and reliable
Property.Multiport electric power electric transformer has the function of electric energy router in energy internet.
Electric power electric transformer structure species are various, and wherein AC/DC/DC type structure is convenient for forming high-voltage alternating, high straightening
Stream and low-voltage direct bus, therefore multiport electric power electric transformer is frequently with this structure.In mesohigh occasion, it is limited by function
The voltage endurance capability of rate switching device is insufficient, and electric power electric transformer need to use modular construction, in this case, on the one hand due to
AC/DC/DC type electric power electric transformer transformation series is more, causes submodule numerous；On the other hand, existing AC/DC/DC type electricity
The DC/DC high frequency conversion isolation link of power electronic transformer, high-pressure side submodule or is connected to high voltage dc bus, needs to be resistant to
Higher DC voltage causes submodule numerous, or is connected to the DC side of AC/DC link submodule, and two seed module one is a pair of
It answers, submodule number is also numerous.The numerous volumes for substantially increasing device of submodule number, cost and control complexity, reduce
Unit efficiency and power density are unfavorable for the popularization and application of electric power electric transformer.
Therefore, it reduces the transformation series of multiport electric power electric transformer, reduce the tolerance electricity of high frequency conversion isolation link
Pressure, so that the efficiency and power density that reduce submodule number, reduce installation cost, improve device, electric to multiport electric power is pushed
The popularization of sub- transformer is of great significance with application.
Summary of the invention
For overcome the deficiencies in the prior art, the present invention proposes a kind of multiport electric power electric transformer of high power density
Topology, the withstanding voltage for reducing multiport electric power electric transformer transformation series, reducing high frequency conversion isolation link, to reduce
Submodule, device for power switching and high frequency transformer number reduce installation cost, improve the efficiency and power density of device.
Specific technical solution of the present invention is as follows：
A kind of multiport electric power electric transformer topology of high power density, including the high-pressure side modular multilevel change of current
Device, medial side high-frequency converter and low-voltage direct bus, the high-pressure side modularization multi-level converter includes High Level AC Voltage
Source, filter inductance, upper and lower bridge arm inductance and submodule is cascaded above and below, high-voltage ac power is separately connected after filter inductance
Upper and lower bridge arm inductance, the input terminal of upper and lower bridge arm inductance connection to upper and lower cascade submodule are upper and lower to cascade the defeated of submodule
Outlet is in parallel, forms high voltage direct current positive bus-bar and negative busbar；It is characterized in that：The medial side high-frequency converter include two every
Straight resonant capacitance, exchange resonant capacitance, neutral point resonant capacitance, two high frequency transformers and two low-voltage full-bridges, two blockings
One end of resonant capacitance is connect with the positive bus-bar of high voltage dc bus and negative busbar respectively, the other end respectively with the upper side and lower side
One end of high frequency transformer primary side winding connects, and the other end positioned at the high frequency transformer primary side winding of the upper side and lower side connects each other
It connecing, forms intermediate point, the one end for exchanging resonant capacitance is connect with filter inductance, and the other end is connect with neutral point resonant capacitance, in
The other end of property point resonant capacitance is connected to intermediate point, and the vice-side winding of high frequency transformer is connected to the input terminal of low-voltage full-bridge；
The low-voltage direct bus is formed by the output end of low-voltage full-bridge, low-voltage direct filter capacitor in parallel on low-voltage direct bus.
Further, each bridge arm of high-pressure side modularization multi-level converter include cascade Nh half-bridge submodule and
Nf full-bridge submodule.
Further, the upper and lower bridge arm output phase of high-pressure side modularization multi-level converter is opposite, the identical high frequency of amplitude
Sinusoidal or square-wave signal.
Further, the full-bridge submodule of high-pressure side modularization multi-level converter and half-bridge submodule either simultaneously or alternately export
Power frequency sinusoidal signal and high frequency sinusoidal or square-wave signal, in addition, the half-bridge submodule also exports direct current signal simultaneously.
Further, high frequency transformer is two-winding transformer, and the leakage inductance part of high frequency transformer replaces high-frequency resonant institute
Need inductance.
Further, when medial side high-frequency converter uses opened loop control, bridge arm inductance, blocking resonant capacitance, high frequency transformation
Device leakage inductance, neutral point resonant capacitance constitute series resonant tank with resonant capacitance is exchanged；The medial side high-frequency converter uses
When closed-loop control, bridge arm inductance, blocking resonant capacitance, neutral point resonant capacitance constitute series resonance time with resonant capacitance is exchanged
Road.
Further, low-voltage full-bridge includes four full-control type device for power switching or four uncontrollable type device for power switching.
Further, medial side high-frequency converter is structure symmetrical above and below, and a high frequency conversion list is respectively contained in the upper side and lower side
The high frequency conversion unit of first or multiple parallel connections.
Further, each of high frequency conversion unit is by a high frequency transformer or more high frequency transformers in parallel and one
A low-voltage full-bridge or the low-voltage full-bridge of multiple parallel connections composition.
Further, the output end of each low-voltage full-bridge is not connected to each other, forms independent low-voltage direct bus or described each
A low-voltage full-bridge output end is connected in parallel to each other or connects, and forms one or more low-voltage direct bus.
Beneficial effect
The invention proposes a kind of multiport electric power electric transformer topology of high power density, which hands over high pressure
Inverter can also be arranged on low-voltage direct bus and realize low-voltage alternating-current output, pass through for stream, high voltage direct current and low-voltage direct bus
Blocking resonant capacitance can separate the AC-input voltage of the DC voltage of high voltage dc bus and high-frequency converter, avoid height
Frequency converter unit bears higher DC voltage, to reduce the resistance to pressure request to high-frequency converter, reduces high frequency conversion unit
Number；If desired increase low-voltage direct port number, then can be in parallel by high frequency conversion unit, without series connection, so neither influence high
DC bus-bar voltage is pressed, also without series average-voltage problem, since each low-voltage direct port is isolated from each other, high frequency conversion list in parallel
Acyclic flow problem between member, above-mentioned advantage are conducive to the plug and play of renewable energy；Neutral point is formed by exchange resonant capacitance,
Neutral point is connected with neutral point resonant capacitance, this structure can prevent the industrial frequency AC signal of positive sequence from flowing into resonant tank, series connection
Neutral point resonant capacitance that the capacitance for exchanging resonant capacitance can configure is larger, to reduce each phase exchange resonant capacitance capacitance
Influence of the difference to resonance frequency and export bring harmonic wave for high-pressure side industrial frequency AC, drawn by neutral point resonant capacitance
Intermediate point, intermediate point are connected to the high-frequency converter of the upper side and lower side, form upper and lower two high-frequency resonant accesses, two humorous
Shake access can independent operating, each other hot redundancy, improve the reliability of device, at the same intermediate point can be directly grounded or through resistance,
Reactance grounded can reduce withstanding voltage when high frequency transformer steady-state operation, reduce the requirement insulated to high frequency transformer；It is high
Pressing the upper and lower bridge arm difference of side modular multilevel energy inverter, output phase is opposite, the identical high frequency ac signal of amplitude, high
Frequency AC signal is cancelled out each other on high voltage dc bus, it is not necessary that high frequency wave trap is arranged in high voltage dc bus；Mentioned topology
With DC link, the complete lattice of enough reality active power and reactive power also has the power quality problem each port
There is certain buffer action；Topology is proposed using half full mixing, full-bridge modules do not export direct current signal, therefore direct current with higher
Voltage utilization can also block DC bipolar short trouble using half full mixed structure.
Main advantage of the invention is the submodule number that can effectively reduce multiport electric power electric transformer, power switch
Device count and high frequency transformer number reduce the cost of multiport electric power electric transformer, improve its efficiency and power density.
Detailed description of the invention
Fig. 1 is a kind of multiport electric power electric transformer topological diagram of high power density of the invention；
Fig. 2 is full-bridge sub-modular structure in a kind of multiport electric power electric transformer topology of high power density of the invention
Figure；
Fig. 3 is half-bridge sub-modular structure in a kind of multiport electric power electric transformer topology of high power density of the invention
Figure；
Fig. 4 is the electric power electric transformer topological diagram based on modularization multi-level converter of the prior art.
Wherein：Filter inductance Lf, bridge arm inductance Larm,, leakage inductance Ld1And Ld2, blocking resonant capacitance Cdcr, exchange resonant capacitance
Cacr, neutral point resonant capacitance CNr, low-voltage direct filter capacitor CdcL, high frequency transformer Tr1、Tr2, device for power switching T1、T2、
T3、T4, full-bridge submodule FBSM, half-bridge submodule HBSM, half-bridge submodule DC capacitor Chbsm, full-bridge submodule DC capacitor
Cfbsm。
Specific embodiment
The invention proposes a kind of multiport electric power electric transformer topologys of high power density.As shown in Figure 1, including height
Press side modularization multi-level converter, medial side high-frequency converter and low-voltage direct bus；The high-pressure side modular multilevel change of current
Device is used to industrial frequency AC electric energy being transformed to direct current energy and high-frequency ac electric energy；Medial side high-frequency converter is used for electrical isolation
Direct current energy is transformed to by high-frequency ac electric energy；Low-voltage direct bus is used for as low-voltage direct load supplying or setting inverter
For low-voltage alternating-current load supplying；High-pressure side modularization multi-level converter includes high-voltage ac power, filter inductance, bridge arm inductance
With cascade submodule, high-voltage ac power is separately connected upper and lower bridge arm inductance after filter inductance, and the other end of bridge arm inductance connects
It is connected to the input terminal of upper and lower bridge arm cascade submodule, the output end that bridge arm cascades submodule is in parallel, forms high voltage dc bus
Positive bus-bar and negative busbar, above structure provide access for power frequency component and direct current signal；Medial side high-frequency converter include every
Straight resonant capacitance, exchange resonant capacitance, neutral point resonant capacitance, high frequency transformer and low-voltage full-bridge, two blocking resonant capacitances
One end connect respectively with the positive bus-bar of high voltage dc bus and negative busbar, the other end high frequency transformation with the upper side and lower side respectively
One end of device primary side winding connects, and the other end positioned at the high frequency transformer primary side winding of the upper side and lower side is connected to each other, and is formed
Intermediate point, the one end for exchanging resonant capacitance are connect with filter inductance, and the other end is connect with neutral point resonant capacitance, neutral point resonance
The other end of capacitor is connected to intermediate point, forms high-frequency signal access, and the vice-side winding of high frequency transformer is connected to low-voltage full-bridge
Input terminal；Low-voltage direct bus is formed by the output end of low-voltage full-bridge, low-voltage direct filtered electrical in parallel on low-voltage direct bus
Hold.
Modular multilevel structure every mutually upper and lower bridge arm in high-pressure side includes that cascade Nh half-bridge submodule and Nf are complete
Bridge submodule, wherein half-bridge submodule voltage Uhbsm need to be more than or equal to high voltage dc bus voltage multiplied by half-bridge submodule number Nh；
Wherein full-bridge submodule voltage Ufbsm need to be more than or equal to the high-frequency alternating current of input high-frequency converter multiplied by half-bridge submodule number Nh
Voltage crest value.
The upper and lower bridge arm output phase of high-pressure side modularization multi-level converter is opposite, the identical high frequency sinusoidal of amplitude or
High-frequency square-wave signal, the high frequency sinusoidal or high-frequency square-wave signal of upper and lower bridge arm are cancelled out each other in high voltage dc bus, DC bus
It is upper not contain the high frequency sinusoidal or high-frequency square-wave signal.
The full-bridge submodule and half-bridge submodule of high-pressure side modularization multi-level converter are either simultaneously or alternately exporting power frequency just
String signal and high frequency ac signal believe the high-frequency ac that industrial frequency AC signal is directly transformed to the input of medial side high-frequency converter
Number, reduce transform part；Half-bridge submodule also exports direct current signal simultaneously.
High frequency transformer is two-winding transformer, and inductance needed for the leakage inductance part of high frequency transformer replaces high-frequency resonant is high
Frequency power transformer primary side winding both ends can by-pass switch in parallel, prevent blocking resonant capacitance charging in start-up course from causing high frequency transformation
Device D.C. magnetic biasing.
When high-frequency converter uses opened loop control, bridge arm inductance, blocking resonant capacitance, high frequency transformer leakage inductance, neutral point
Resonant capacitance constitutes series resonant tank with resonant capacitance is exchanged, and high frequency transformer original secondary voltage is distributed by no-load voltage ratio；High frequency becomes
When parallel operation uses closed-loop control, bridge arm inductance, blocking resonant capacitance, neutral point resonant capacitance constitute series connection with resonant capacitance is exchanged
Resonant tank controls high-frequency converter transimission power using high frequency transformer leakage inductance, using closed loop phase shifting control.
Full-bridge submodule includes four full-control type device for power switching and a DC capacitor, and half-bridge submodule includes two
Full-control type device for power switching and a DC capacitor, half-bridge submodule and full-bridge submodule output end can by-pass switch in parallel,
Realize the excision of failure submodule；Four full-control type device for power switching can be used in low-voltage full-bridge, realize to and fro flow of power, also
Four uncontrollable type device for power switching can be used, power can only flow to low-pressure side by high-pressure side at this time.
High-frequency converter is structure symmetrical above and below, and the upper side and lower side can include respectively a high frequency conversion unit, in large capacity
Occasion, the upper side and lower side can be used multiple high frequency conversion units parallel connections, reduce the capacity of single high frequency conversion unit；One high frequency
Converter unit is made of one or more high frequency transformer in parallel and one or more low-voltage full-bridges.
If the output end of each low-voltage full-bridge is not connected to each other, independent low-voltage direct bus can be formed；Each low pressure
If the output end of full-bridge is connected in parallel to each other or connects, one or more low-voltage direct bus is formed.
It is illustrated below with one embodiment.
10kV/1MVA/50Hz, high voltage direct current 20kV/0.5MVA, low-voltage direct 750V/0.5MVA are exchanged with three-phase high-voltage
For carry out embodiment analysis.
Comprehensive economy and efficiency, selecting high-pressure side Modularized multi-level converter sub-module voltage is 900V, therefore bridge
Arm half-bridge submodule number Nh >=(20000/900) ≈ 22.2, takes Nh=23；To reduce submodule number to the greatest extent, Nf=1 is set, then
The alternating voltage peak of high-frequency converter input is 900V, and Waveform Design is square wave, Frequency Design 10kHz；High frequency transformer
Original edge voltage is 900V, secondary voltage 750V, no-load voltage ratio 1.2:1.
According to above-mentioned fixed condition, it can obtain on the upside of high-frequency converter or downside input current virtual value is about 278A,
Also it is equal to high frequency transformer primary current virtual value, peak value is about 393A, and high frequency transformer secondary current virtual value is 278 ×
1.2=334A, peak value 472A, low-voltage direct busbar voltage are 750V.It can to sum up obtain, two 1200V/ can be used in low-voltage full-bridge
450A IGBT half-bridge module composition, such as Infineon FF450R12ME4, total dosage is 4.
According to above-mentioned fixed condition, can obtain high-voltage ac current peak value is about 82A, and high voltage dc bus electric current is about
25A, therefore can obtain multi-level inverter bridge arm current effective value is about 116A, peak value is about 207A, and submodule voltage is
900V, can to sum up obtain half-bridge submodule or 1700V/300A IGBT half-bridge mould can be used in full-bridge submodule device for power switching
Block, such as Infineon FF300R17ME4, total dosage is Nf × 2 × 6+Nh × 6=150.
In conclusion mentioned topology needs IGBT half-bridge module 154, high frequency transformer 2, submodule is (with one and half
Bridge or full-bridge meter) 148.If desired DC bipolar failure block function, then the full-bridge submodule total voltage in upper and lower bridge arm is answered
More than or equal to twice of High Level AC Voltage source line voltage peak value, full-bridge submodule can be added in bridge arm at this time, or by part
Half-bridge submodule is changed to full-bridge submodule, but its working method is still the same as half-bridge submodule.
Topology comparison：
It is the electric power electric transformer topology based on modularization multi-level converter of the prior art shown in Fig. 4.Above-mentioned
In case, if Fig. 4 topology high-pressure side modularization multi-level converter equally uses 900V submodule, the high-pressure side of Fig. 4 topology
Modularization multi-level converter needs IGBT half-bridge module 138, if isolation level equally uses 900V submodule, Fig. 4 topology every
IGBT half-bridge module 92 are needed from grade, to sum up needs IGBT half-bridge module 230, high frequency transformer 23, submodule (with one altogether
Half-bridge or full-bridge meter) 184.Compared to the mentioned topology of the present invention, Fig. 4 topology IGBT half-bridge module dosage increases by 49.3%, high frequency
Transformer dosage increases by 1050%, and submodule quantity increases by 24.3%.
In addition, Fig. 4 topology is if you need to add the low-voltage direct port that more can work independently, it need to be on high voltage dc bus
As soon as increasing an isolation level, i.e., one independent low-voltage direct port of every increase needs to increase by 23 high frequency transformers and transformer primary
The full-bridge modules on secondary side, and this patent mention topology only need to be in each high frequency conversion in parallel in the upper side and lower side of high-frequency converter
Unit, therefore there is better scalability.
In conclusion topology of the present invention can be effectively reduced device for power switching number, high frequency transformer number and submodule number,
Electric power electric transformer cost is reduced, the efficiency and power density of electric power electric transformer are improved, while proposing topology with good
Good scalability is conducive to the plug and play of renewable energy convenient for forming multiple low-voltage direct ports being isolated from each other, this
Outside, proposing topology has DC link, can be realized active and reactive full decoupled and power quality problem isolation, has
There are good controllability and output characteristics.
Claims (10)
1. a kind of multiport electric power electric transformer topology of high power density, including high-pressure side modularization multi-level converter,
Medial side high-frequency converter and low-voltage direct bus, the high-pressure side modularization multi-level converter include high-voltage ac power,
Filter inductance, upper and lower bridge arm inductance and submodule is cascaded above and below, high-voltage ac power is separately connected above and below after filter inductance
Bridge arm inductance, upper and lower bridge arm inductance connection is to the input terminal of upper and lower cascade submodule, and the upper and lower output end for cascading submodule is simultaneously
Connection forms high voltage direct current positive bus-bar and negative busbar；It is characterized in that：The medial side high-frequency converter includes two blocking resonance
Capacitor, exchange resonant capacitance, neutral point resonant capacitance, two high frequency transformers and two low-voltage full-bridges, two blocking resonance electricity
One end of appearance is connect with the positive bus-bar of high voltage dc bus and negative busbar respectively, and the other end becomes with the high frequency of the upper side and lower side respectively
One end of depressor primary side winding connects, and the other end positioned at the high frequency transformer primary side winding of the upper side and lower side is connected to each other, shape
At intermediate point, the one end for exchanging resonant capacitance is connect with filter inductance, and the other end is connect with neutral point resonant capacitance, and neutral point is humorous
The other end of vibration capacitor is connected to intermediate point, and the vice-side winding of high frequency transformer is connected to the input terminal of low-voltage full-bridge；It is described low
Pressure DC bus is formed by the output end of low-voltage full-bridge, low-voltage direct filter capacitor in parallel on low-voltage direct bus.
2. a kind of multiport electric power electric transformer topology of high power density according to claim 1, it is characterised in that：
Each bridge arm of the high-pressure side modularization multi-level converter includes cascade Nh half-bridge submodule and Nf full-bridge
Module.
3. a kind of multiport electric power electric transformer topology of high power density according to claim 1, it is characterised in that：
The upper and lower bridge arm output phase of the high-pressure side modularization multi-level converter is opposite, the identical high frequency sinusoidal of amplitude or square wave
Signal.
4. a kind of multiport electric power electric transformer topology of high power density according to claim 2, it is characterised in that：
The full-bridge submodule and half-bridge submodule of the high-pressure side modularization multi-level converter either simultaneously or alternately export power frequency sine letter
Number with high frequency sinusoidal or square-wave signal, in addition, the half-bridge submodule also exports direct current signal simultaneously.
5. a kind of multiport electric power electric transformer topology of high power density according to claim 1, it is characterised in that：
The high frequency transformer is two-winding transformer, and the leakage inductance part of high frequency transformer is instead of inductance needed for high-frequency resonant.
6. a kind of multiport electric power electric transformer topology of high power density according to claim 1, it is characterised in that：
When the medial side high-frequency converter uses opened loop control, bridge arm inductance, blocking resonant capacitance, high frequency transformer leakage inductance, neutrality
Point resonant capacitance constitutes series resonant tank with resonant capacitance is exchanged；When the medial side high-frequency converter uses closed-loop control,
Bridge arm inductance, blocking resonant capacitance, neutral point resonant capacitance constitute series resonant tank with resonant capacitance is exchanged.
7. a kind of multiport electric power electric transformer topology of high power density according to claim 1, it is characterised in that：
The low-voltage full-bridge includes four full-control type device for power switching or four uncontrollable type device for power switching.
8. the multiport electric power electric transformer topology of high power density according to claim 1, it is characterised in that：It is described
Medial side high-frequency converter is structure symmetrical above and below, each height containing a high frequency conversion unit or multiple parallel connections in the upper side and lower side
Frequency converter unit.
9. the multiport electric power electric transformer topology of high power density according to claim 8, it is characterised in that：It is described
Each of high frequency conversion unit is by a high frequency transformer or more high frequency transformers in parallel and a low-voltage full-bridge or more
The low-voltage full-bridge of a parallel connection forms.
10. a kind of multiport electric power electric transformer topology of high power density according to claim 1, feature exist
In：The output end of each low-voltage full-bridge is not connected to each other, forms independent low-voltage direct bus or each low pressure is complete
Bridge output end is connected in parallel to each other or connects, and forms one or more low-voltage direct bus.
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| CN110391747A (en) * | 2019-07-24 | 2019-10-29 | 山东大学 | A kind of high step-up ratio isolation DC-DC converter topology and its control method |
| CN111276992A (en) * | 2020-01-21 | 2020-06-12 | 全球能源互联网研究院有限公司 | Modular multi-level alternating current-direct current conversion system |
| CN112436746A (en) * | 2020-11-05 | 2021-03-02 | 吉林大学 | Modularized multi-level high-voltage electromagnetic transmitting circuit |
| CN112600440A (en) * | 2020-12-17 | 2021-04-02 | 清华大学 | Converter topology circuit |
| CN112803789A (en) * | 2021-02-01 | 2021-05-14 | 中科兆和电力技术(山东)有限公司 | Cophase power supply device |
| 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 |
| CN113162447A (en) * | 2021-04-26 | 2021-07-23 | 清华大学 | Power electronic transformer based on step-down AC-DC and medium frequency isolated DC-DC |
| CN113726180A (en) * | 2021-09-06 | 2021-11-30 | 河北工业大学 | Output voltage self-balancing control method for bipolar direct-current power grid |
| CN113938042A (en) * | 2021-11-02 | 2022-01-14 | 国网山东省电力公司电力科学研究院 | Modular multilevel converter and submodule capacitor voltage balancing method |
| CN114679073A (en) * | 2022-05-06 | 2022-06-28 | 西安交通大学 | Data center power module and modular power supply |
| CN115276434A (en) * | 2022-01-28 | 2022-11-01 | 昆明理工大学 | Electric energy router containing full-bridge submodule and control method thereof |
| CN116470558A (en) * | 2023-05-18 | 2023-07-21 | 中国华能集团清洁能源技术研究院有限公司 | Energy storage system |
| CN116885969A (en) * | 2023-09-07 | 2023-10-13 | 西安为光能源科技有限公司 | AC/DC electric energy conversion system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105048788A (en) * | 2015-06-04 | 2015-11-11 | 广西电网有限责任公司电力科学研究院 | Multi-port power electronic transformer of mixed cascading structure, and control method thereof |
| US9425703B2 (en) * | 2010-01-11 | 2016-08-23 | Koninklijke Philips N.V. | AC/DC converter circuit for common three-phase AC input voltages and method of operating such converter circuit |
| CN106452136A (en) * | 2016-06-20 | 2017-02-22 | 清华大学 | Multi-port power electronic converter for energy internet |
| CN106787861A (en) * | 2017-01-16 | 2017-05-31 | 华北电力大学 | Modular multilevel full-bridge mode of resonance electric power electric transformer topology |
| CN107612407A (en) * | 2017-09-12 | 2018-01-19 | 东南大学 | High power density electric power electric transformer topological structure and its control method |
| CN107623456A (en) * | 2017-09-29 | 2018-01-23 | 东南大学 | Multiport electric power electric transformer topology and its control method based on MMC |
-
2018
- 2018-07-06 CN CN201810736782.3A patent/CN108832825B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US9425703B2 (en) * | 2010-01-11 | 2016-08-23 | Koninklijke Philips N.V. | AC/DC converter circuit for common three-phase AC input voltages and method of operating such converter circuit |
| CN105048788A (en) * | 2015-06-04 | 2015-11-11 | 广西电网有限责任公司电力科学研究院 | Multi-port power electronic transformer of mixed cascading structure, and control method thereof |
| CN106452136A (en) * | 2016-06-20 | 2017-02-22 | 清华大学 | Multi-port power electronic converter for energy internet |
| CN106787861A (en) * | 2017-01-16 | 2017-05-31 | 华北电力大学 | Modular multilevel full-bridge mode of resonance electric power electric transformer topology |
| CN107612407A (en) * | 2017-09-12 | 2018-01-19 | 东南大学 | High power density electric power electric transformer topological structure and its control method |
| CN107623456A (en) * | 2017-09-29 | 2018-01-23 | 东南大学 | Multiport electric power electric transformer topology and its control method based on MMC |
Non-Patent Citations (1)
| Title |
|---|
| XIAOHUI LV 等: ""Study on a New Topology of Power Electronic Transformer"", 《2017 2ND INTERNATIONAL CONFERENCE ON POWER AND RENEWABLE ENERGY》 * |
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| CN110365008A (en) * | 2019-06-17 | 2019-10-22 | 国网江苏省电力有限公司电力科学研究院 | Electric power electric transformer DC port current transformer position optimization configuration method |
| CN110365008B (en) * | 2019-06-17 | 2022-08-19 | 国网江苏省电力有限公司电力科学研究院 | Power electronic transformer direct current port current transformer position optimization configuration method |
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| CN112600440A (en) * | 2020-12-17 | 2021-04-02 | 清华大学 | Converter topology circuit |
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| CN113938042A (en) * | 2021-11-02 | 2022-01-14 | 国网山东省电力公司电力科学研究院 | Modular multilevel converter and submodule capacitor voltage balancing method |
| CN115276434A (en) * | 2022-01-28 | 2022-11-01 | 昆明理工大学 | Electric energy router containing full-bridge submodule and control method thereof |
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| CN116885969A (en) * | 2023-09-07 | 2023-10-13 | 西安为光能源科技有限公司 | AC/DC electric energy conversion system |
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