CN109713898A - A kind of modular multilevel DC-DC converter topology without AC link - Google Patents
A kind of modular multilevel DC-DC converter topology without AC link Download PDFInfo
- Publication number
- CN109713898A CN109713898A CN201711016743.8A CN201711016743A CN109713898A CN 109713898 A CN109713898 A CN 109713898A CN 201711016743 A CN201711016743 A CN 201711016743A CN 109713898 A CN109713898 A CN 109713898A
- Authority
- CN
- China
- Prior art keywords
- submodule
- phase
- cathode
- bridge arm
- link
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Inverter Devices (AREA)
Abstract
The present invention provides the modular multilevel DC/DC converter topology for being not necessarily to AC link.Without the modular multilevel DC/DC converter topology of AC link, by improved two-phase half-bridge MMC model, subsidiary loop and failure clamp diode group joint mapping are pressed certainly.It is wherein made of from pressure subsidiary loop booster diode, auxiliary capacitor, auxiliary IGBT module, two-phase half-bridge MMC model is connect with from pressure subsidiary loop by the newly-increased port in half-bridge submodule.Failure clamp diode group is connected in series by a series of clamp diodes, is connected between " primary side " DC bus and each phase bridge arm.The DC/DC converter topology, the intervention of exchange link can not depended on, realize the direct conversion of two sides DC energy, it is able to achieve the Fault Isolation of converter two sides simultaneously, on the basis of exchanging link loss in evading conversion process of energy, the capacity and cost of required MMC in DC/DC converter topology are effectively reduced.
Description
Technical field
The present invention relates to high-voltage dc transmission electrical domains, and in particular to a kind of modular multilevel DC/DC without AC link
Converter topology.
Background technique
It is defeated in remote large capacity by the extensive concern of academia and engineering circles since HVDC Transmission Technology comes out
The technical advantage of electricity, new-energy grid-connected etc. is increasingly prominent.With the promotion of DC transmission engineering voltage class, transmission capacity
Increase and application scenarios diversification, the demand of the interconnection of more DC voltage levels and DC voltage conversion gradually shows.Skill
Art is reliable, the good DC/DC converter of economy is increasingly becoming research hotspot.
Academia is directed to the research of high-voltage large-capacity DC/DC converter, and chopper-type, transformation are roughly divided into from technology path
Three directions of device isolated form and mode of resonance, three classes direction again can be according to the specific a variety of embodiment party of inverter topology formation
Formula.Wherein it is based on the transformer isolation type of modularization multi-level converter (modular multilevel converter, MMC)
DC/DC converter topology relies on its flexibility, reliability and outstanding expansibility in terms of voltage class and transformation capacity,
Represent the mainstream thinking of DC/DC inverter topology design at this stage.
On the one hand the configuration of AC transformer in topology realizes the electrical isolation of converter two sides, on the other hand couples
The AC links of converter two sides.DC voltage cannot be steadily exported in view of " exchange side " in MMC topology, currently based on MMC
Two sides DC voltage conversion process is completed in the intervention that the DC/DC converter of topology relies on AC link, therefore should inherently be determined
Justice is DC/AC/DC code converter.Since conversion process is related to the conversion of form of energy twice, this topological distinct issues is just
It is that MMC capacity utilization is low, cost of investment is higher.
In order to promote the running wastage that the capacity utilization of MMC in DC/DC converter and inhibiting exchanges link, related scholar
Many valuable trials have been carried out on converter topology.Document " Multiport DC-DC Autotransformer
For Interconnecting Multiple High-Voltage DC Systems at Low Cost ", proposes multiterminal
The DC/DC auto-transformer of mouth, by establishing direct electrical connection in the two sides of DC/DC converter, needed for effectively saving
The capacity and cost of inverter.But on the one hand the program causes different sub- converters in topology to be in different potential levels, absolutely
Edge design is relative complex, on the other hand still has portion of energy to need to transmit by AC system between inverter in topology, still without
Method gets rid of dependence of the DC/DC converter to AC link based on MMC.
Summary of the invention
In view of the above-mentioned problems, it is an object of the invention to propose it is a kind of economy, it is modular, do not depend on AC link, can
It is directly realized by two sides DC energy two-way changing while being able to achieve the DC/DC converter topology of two sides Fault Isolation.
The specific constituted mode of the present invention is as follows.
Without the modular multilevel DC/DC converter topology of AC link, including the half-bridge MMC mould being made of A, B two-phase
Type, A, B two-phase are respectively by 2NA improved half-bridge submodule is connected in series；Including by 4N+ 4 booster diodes, 2 auxiliary
Capacitor, what 2 auxiliary IGBT modules were constituted presses subsidiary loop certainly；A series of failure being made of including 4 groups clamp diodes
Clamp diode group.
The above-mentioned modular multilevel DC/DC converter topology without AC link, improved A phase half-bridge submodule are shared
Three ports, wherein conventional port is drawn from submodule IGBT module midpoint and submodule capacitor cathode respectively, increases port newly certainly
Submodule capacitance cathode is drawn；There are three ports altogether for improved B phase half-bridge submodule, and wherein conventional port is respectively from submodule
Capacitance cathode and submodule IGBT module midpoint are drawn, and are increased port newly and are drawn from submodule capacitor cathode；Improved submodule
It is connected in series with each other by conventional port in failure clamp diode group, and subsidiary loop is pressed by newly-increased port connection certainly.
The above-mentioned modular multilevel DC/DC converter topology without AC link, from pressing in subsidiary loop, first auxiliary
Capacitance cathode is helped to connect first auxiliary IGBT module, cathode connection clamp diode is incorporated to DC bus anode；Second auxiliary
Capacitor cathode is helped to connect second auxiliary IGBT module, anode connection clamp diode is incorporated to DC bus cathode；Clamp two poles
Pipe, connects the newly-increased port of adjacent submodule, furthermore distinguishingly, connects in A phase in bridge arm the 1st sub- module capacitance and first
Auxiliary capacitor anode, connects the in A phase lower bridge armNA sub- module capacitance and second auxiliary capacitor anode connect bridge arm in B phase
In the 1st sub- module capacitance and first auxiliary capacitor cathode, connect in B phase lower bridge arm theNA sub- module capacitance with second
Auxiliary capacitor cathode.
The above-mentioned modular multilevel DC/DC converter topology without AC link, in 4 groups of failure clamp diode groups, position
In bridge arm in A phase, it is made of the clamp diode of a series of anode towards submodules, to connect bridge arm submodule in A phase
With " primary side " DC bus anode；Positioned at A phase lower bridge arm, by a series of positive clamp diode structures towards submodule
At to connect A phase lower bridge arm submodule and " primary side " DC bus cathode；A series of bridge arm in B phase, by cathode
It is constituted towards the clamp diode of submodule, to connect bridge arm submodule and " primary side " DC bus anode in B phase；It is located at
B phase lower bridge arm, be made of a series of clamp diode of cathode towards submodule, to connect B phase lower bridge arm submodule with
" primary side " DC bus cathode.
Detailed description of the invention
Fig. 1 is the structural schematic diagram of DC/DC inverter submodule；
Fig. 2 is the modular multilevel DC/DC converter topology without AC link.
Specific embodiment
For the performance and working principle that the present invention is further explained, below in conjunction with attached drawing to the constituted mode and work to invention
It is specifically described as principle.But the modular multilevel DC/DC converter topology without AC link based on the principle is unlimited
In Fig. 2.
With reference to Fig. 2, without the modular multilevel DC/DC converter topology of AC link, including be made of A, B two-phase half
Bridge MMC model, A, B two-phase are respectively by 2NA improved half-bridge submodule is connected in series；Including by 4N+ 4 booster diodes,
2 auxiliary capacitorsC 1、C 2, 2 auxiliary IGBT modulesT 1、T 2Constitute from pressing subsidiary loop, including 4 groups by a series of clamps
The failure clamp diode group D that diode is constitutedAu 、DAl 、DBu 、DBl 。
With reference to Fig. 1, two are shared without improved submodule in the modular multilevel DC/DC converter topology of AC link
Class, wherein the half-bridge submodule of composition A phase includes three ports, conventional port is respectively from submodule IGBT module midpoint and submodule
Block capacitor cathode is drawn, and is increased port newly and is drawn from submodule capacitance cathode；The half-bridge submodule for forming B phase includes three ports,
Conventional port is drawn from submodule capacitance cathode and submodule IGBT module midpoint respectively, increases port newly from submodule capacitor cathode
It draws.
With reference to Fig. 2, it is not necessary that in the modular multilevel DC/DC converter topology of AC link, improved submodule passes through
Conventional port is connected in series with each other in failure clamp diode group, and presses subsidiary loop certainly by newly-increased port connection；From equal
It presses in subsidiary loop, auxiliary capacitorC 1Anode connection auxiliary IGBT moduleT 1, cathode connection clamp diode be incorporated to DC bus just
Pole；Auxiliary capacitorC 2Cathode connection auxiliary IGBT moduleT 2, anode connection clamp diode be incorporated to DC bus cathode；Clamp two
Pole pipe connects the newly-increased port of adjacent submodule, furthermore distinguishingly, connects in A phase the 1st sub- module capacitance and auxiliary in bridge arm
CapacitorC 1Anode connects the in A phase lower bridge armNA sub- module capacitance and auxiliary capacitorC 2Anode connects in B phase the 1st in bridge arm
Submodule capacitor and auxiliary capacitorC 1Cathode connects the in B phase lower bridge armNA sub- module capacitance and auxiliary capacitorC 2Cathode.
With reference to Fig. 2, without in the modular multilevel DC/DC converter topology of AC link, the failure of bridge arm in A phase
Clamp diode group DAu , it is made of the clamp diode of a series of anode towards submodules, to connect bridge arm submodule in A phase
With " primary side " DC bus anode；Positioned at the failure clamp diode group D of A phase lower bridge armAl , by a series of positive towards submodule
The clamp diode of block is constituted, to connect A phase lower bridge arm submodule and " primary side " DC bus cathode；Positioned at B Xiang Shangqiao
The failure clamp diode group D of armBu , it is made of a series of clamp diode of cathode towards submodule, to connect B Xiang Shangqiao
Arm submodule and " primary side " DC bus anode；Positioned at the failure clamp diode group D of B phase lower bridge armBl , by a series of cathode
It is constituted towards the clamp diode of submodule, to connect B phase lower bridge arm submodule and " primary side " DC bus cathode.
Without in the modular multilevel DC/DC converter topology of AC link, by topology itself to the equal of bridge arm energy
Weighing apparatus ability, " primary side ", " secondary side " of converter can steadily export DC voltage, can not depend on AC link with this
The direct conversion of two sides DC energy is realized in intervention, while can guarantee the Fault Isolation of converter two sides.
It is illustrated by above-mentioned it is found that the DC/DC converter topology, which can not depend on AC link, realizes two sides DC energy
Direct transformation.
Finally it should be noted that: described embodiment is only some embodiments of the present application, rather than whole realities
Apply example.Based on the embodiment in the application, those of ordinary skill in the art are obtained without making creative work
Every other embodiment, shall fall in the protection scope of this application.
Claims (5)
1. being not necessarily to the modular multilevel DC/DC converter topology of AC link, it is characterised in that: including what is be made of A, B two-phase
Half-bridge MMC model, A, B two-phase are respectively by 2NA improved half-bridge submodule is connected in series；Including by 4N+ 4 two poles of auxiliary
Pipe, 2 auxiliary capacitorsC 1、C 2, 2 auxiliary IGBT modulesT 1、T 2What is constituted presses subsidiary loop certainly；Including 4 groups by a series of pincers
The failure clamp diode group D that position diode is constitutedAu 、DAl 、DBu 、DBl 。
2. being not necessarily to the modular multilevel DC/DC converter topology of AC link according to right 1, it is characterised in that: transformation
There are three ports altogether for A phase half-bridge submodule afterwards, and wherein conventional port is respectively from submodule IGBT module midpoint and submodule electricity
Hold cathode to draw, increases port newly and drawn from submodule capacitance cathode；Port there are three improved B phase half-bridge submodule is total,
Middle conventional port is drawn from submodule capacitance cathode and submodule IGBT module midpoint respectively, and it is negative from submodule capacitor to increase port newly
It draws pole；Improved submodule is connected in series with each other by conventional port in failure clamp diode group, and passes through newly-increased end
Subsidiary loop is pressed in mouth connection certainly.
3. being not necessarily to the modular multilevel DC/DC converter topology of AC link according to right 1, it is characterised in that: from
It presses in subsidiary loop, auxiliary capacitorC 1Anode connection auxiliary IGBT moduleT 1, cathode connection clamp diode be incorporated to DC bus just
Pole；Auxiliary capacitorC 2Cathode connection auxiliary IGBT moduleT 2, anode connection clamp diode be incorporated to DC bus cathode；Clamp two
Pole pipe connects the newly-increased port of adjacent submodule, furthermore distinguishingly, connects in A phase the 1st sub- module capacitance and auxiliary in bridge arm
CapacitorC 1Anode connects the in A phase lower bridge armNA sub- module capacitance and auxiliary capacitorC 2Anode connects in B phase the 1st in bridge arm
Submodule capacitor and auxiliary capacitorC 1Cathode connects the in B phase lower bridge armNA sub- module capacitance and auxiliary capacitorC 2Cathode.
4. being not necessarily to the modular multilevel DC/DC converter topology of AC link according to right 1, it is characterised in that: 4 groups of events
Hinder in clamp diode group, the D of bridge arm in A phaseAu , it is made of, uses the clamp diode of a series of anode towards submodules
To connect bridge arm submodule and " primary side " DC bus anode in A phase；Positioned at the D of A phase lower bridge armAl , by a series of positive courts
It is constituted to the clamp diode of submodule, to connect A phase lower bridge arm submodule and " primary side " DC bus cathode；Positioned at B
The D of bridge arm in phaseBu , be made of a series of clamp diode of cathode towards submodule, to connect in B phase bridge arm submodule with
" primary side " DC bus anode；Positioned at the D of B phase lower bridge armBl , by a series of cathode towards the clamp diode structure of submodule
At to connect B phase lower bridge arm submodule and " primary side " DC bus cathode.
5. being not necessarily to the modular multilevel DC/DC converter topology of AC link according to right 1, it is characterised in that: be not necessarily to
In the modular multilevel DC/DC converter topology of AC link, " primary side ", " secondary side " of converter can be exported steadily
DC voltage realizes the direct conversion of two sides DC energy with the intervention that this does not depend on AC link, while can be realized two sides
Fault Isolation.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711016743.8A CN109713898A (en) | 2017-10-26 | 2017-10-26 | A kind of modular multilevel DC-DC converter topology without AC link |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711016743.8A CN109713898A (en) | 2017-10-26 | 2017-10-26 | A kind of modular multilevel DC-DC converter topology without AC link |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109713898A true CN109713898A (en) | 2019-05-03 |
Family
ID=66252173
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201711016743.8A Pending CN109713898A (en) | 2017-10-26 | 2017-10-26 | A kind of modular multilevel DC-DC converter topology without AC link |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109713898A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021122187A1 (en) * | 2019-12-20 | 2021-06-24 | Supergrid Institute | Dc/dc voltage converter provided with a circuit-breaker device |
| CN113381607A (en) * | 2021-06-08 | 2021-09-10 | 哈尔滨工业大学 | Low-cost high-efficiency high-transformation-ratio DC/DC converter |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578869A (en) * | 2014-12-23 | 2015-04-29 | 北京理工大学 | Capacitance self-voltage-sharing three-phase multi-level converter circuit with direct-current bus |
| CN105099245A (en) * | 2015-08-11 | 2015-11-25 | 南方电网科学研究院有限责任公司 | Diode clamping type modular multi-level current converter sub-module equivalent simulation method |
| CN105576982A (en) * | 2016-02-02 | 2016-05-11 | 上海交通大学 | Non-isolated DC transformer |
| CN105896966A (en) * | 2016-05-17 | 2016-08-24 | 湖南大学 | Modular multilevel DC-DC converter with high transformation ratio and control method of modular multilevel DC-DC converter |
| CN106452147A (en) * | 2016-11-21 | 2017-02-22 | 西安交通大学 | Three-phase symmetric topology for self-balance of capacitor voltage of MMC (Modular Multilevel Converter) module |
| CN106998140A (en) * | 2016-01-25 | 2017-08-01 | 华北电力大学 | Uniderectional DC-DC converter without Pressure and Control |
-
2017
- 2017-10-26 CN CN201711016743.8A patent/CN109713898A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104578869A (en) * | 2014-12-23 | 2015-04-29 | 北京理工大学 | Capacitance self-voltage-sharing three-phase multi-level converter circuit with direct-current bus |
| CN105099245A (en) * | 2015-08-11 | 2015-11-25 | 南方电网科学研究院有限责任公司 | Diode clamping type modular multi-level current converter sub-module equivalent simulation method |
| CN106998140A (en) * | 2016-01-25 | 2017-08-01 | 华北电力大学 | Uniderectional DC-DC converter without Pressure and Control |
| CN105576982A (en) * | 2016-02-02 | 2016-05-11 | 上海交通大学 | Non-isolated DC transformer |
| CN105896966A (en) * | 2016-05-17 | 2016-08-24 | 湖南大学 | Modular multilevel DC-DC converter with high transformation ratio and control method of modular multilevel DC-DC converter |
| CN106452147A (en) * | 2016-11-21 | 2017-02-22 | 西安交通大学 | Three-phase symmetric topology for self-balance of capacitor voltage of MMC (Modular Multilevel Converter) module |
Non-Patent Citations (1)
| Title |
|---|
| CONGZHE GAO 等: "A New Parallel-Connected Diode-Clamped Modular Multilevel Converter With Voltage Self-Balancing", 《IEEE TRANSACTIONS ON POWER DELIVERY》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2021122187A1 (en) * | 2019-12-20 | 2021-06-24 | Supergrid Institute | Dc/dc voltage converter provided with a circuit-breaker device |
| FR3105626A1 (en) * | 2019-12-20 | 2021-06-25 | Supergrid Institute | DC / DC voltage converter equipped with a circuit breaker |
| CN113381607A (en) * | 2021-06-08 | 2021-09-10 | 哈尔滨工业大学 | Low-cost high-efficiency high-transformation-ratio DC/DC converter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN106452136B (en) | A kind of multiport converters for energy internet | |
| CN104967141B (en) | A kind of Hybrid HVDC system | |
| CN105515353B (en) | The four port electric power electric transformers based on mixed type module multi-level converter | |
| WO2021017170A1 (en) | Modularized multilevel converter for multi-port direct current power flow control and control method | |
| CN103208929B (en) | Based on the electronic power transformer of MMC | |
| CN102624267B (en) | Inverter and application circuit in three-phase system | |
| CN103427657B (en) | A kind of high-voltage DC-DC conversion device | |
| CN105071425A (en) | Hybrid direct-current power transmission system based on LCC and MMC | |
| CN105356770B (en) | A kind of MMC submodule topological structure based on H bridge | |
| CN107005059A (en) | A kind of current source inverter system and inverter | |
| CN104993716A (en) | Modular multilevel converter and hybrid double-unit sub-module | |
| CN103457468A (en) | High voltage direct current-direct current transformer | |
| CN105375757A (en) | DC voltage conversion device and bridge arm control method thereof | |
| CN103427652A (en) | High-voltage high-power DC-DC conversion device | |
| CN107039980A (en) | A kind of HVDC flow controller | |
| CN103427658A (en) | High-voltage DC-DC conversion device based on multi-winding transformer | |
| CN109995256A (en) | Nine different bridge arm module multi-level converters of bridge arm submodule number, system and method | |
| CN109713898A (en) | A kind of modular multilevel DC-DC converter topology without AC link | |
| WO2016029824A1 (en) | Direct current voltage conversion device and bridge arm control method therefor | |
| CN106505902A (en) | LCC/VSC direct currents interconnect transformator | |
| CN103441676A (en) | Modularized device for conversion between high-voltage direct current and direct current | |
| CN103762879A (en) | Dual-output single-phase three-switch-group MMC inverter without direct current bias and control method thereof | |
| CN106329927A (en) | Modular multilevel converter-based quasi-zero-current switch DC/DC converter | |
| CN109510492A (en) | A kind of dual output MMC topology based on bridge arm bifurcation structure | |
| CN109474193A (en) | A kind of modular solid-state transformer based on three level of diode clamp bit-type |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20190503 |