CN106998140B - Uniderectional DC-DC converter without Pressure and Control - Google Patents
Uniderectional DC-DC converter without Pressure and Control Download PDFInfo
- Publication number
- CN106998140B CN106998140B CN201610047400.7A CN201610047400A CN106998140B CN 106998140 B CN106998140 B CN 106998140B CN 201610047400 A CN201610047400 A CN 201610047400A CN 106998140 B CN106998140 B CN 106998140B
- Authority
- CN
- China
- Prior art keywords
- submodule
- port
- bridge
- converter
- cathode
- 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.)
- Active
Links
Classifications
-
- 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
- H02M3/3353—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 at least two simultaneously operating switches on the input side, e.g. "double forward" or "double (switched) flyback" converter
-
- 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
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Rectifiers (AREA)
Abstract
The present invention provides the unidirectional DC--DC converter for being not necessarily to Pressure and Control.The unidirectional DC--DC converter, by the DC-AC converter, the diode rectifier bridge joint mapping that are based on modularization multi-level converter (MMC).Modularization multi-level converter can clamp DC side failure, also can conveniently realize the unidirectional DC--DC converter in the application of high-power occasion using its modular characteristic；Conversion of the uncontrollable rectifier bridge to complete AC-DC.Unidirectional DC--DC converter without Pressure and Control relies on the auxiliary capacitor of internal configuration, auxiliary IGBT module, clamp diode can be on the basis of unidirectional DC--DC converter realizes that DC voltage is converted, the spontaneously capacitance voltage of equilibrium DC-AC converter Neutron module, without special Pressure and Control.
Description
Technical field
The present invention relates to transmission & distribution electro-technical fields, and in particular to a kind of Uniderectional DC-DC converter without Pressure and Control.
Technical background
DC-DC converter is the important component of DC grid, the DC-DC based on modularization multi-level converter MMC
Converter is suitable for high-power occasion since MMC constructs DC-AC converter by the way of sub-module cascade, has very
High application prospect.
The DC voltage of MMC is not supported by a bulky capacitor, but by a series of mutually independent suspension submodules
Capacitor supported in series.Also for the transfer efficiency for improving DC-DC converter, it is necessary to assure submodule capacitor voltage is in bridge arm power
Periodical flowing in be in the state of dynamic stability.
Sequence based on capacitance voltage sequence pressure algorithm is current solution MMC Neutron module capacitance voltage equalization problem
Mainstream thinking.Firstly, the realization of ranking function must rely on capacitance voltage Millisecond sampling, need a large amount of sensor and
Optical-fibre channel is cooperated；Secondly, the operand of capacitance voltage sequence increases rapidly when group number of modules increases, for control
The hardware design of device brings huge challenge；In addition, sequence presses the realization of algorithm to have very high want to the frequency of cut-offfing of submodule
It asks, cut-offs frequency and be closely related with equalizing effect, in practice process, probably due to the limitation of equalizing effect, it has to improve
The triggering frequency of submodule, and then the increase for bringing inverter to be lost.
Summary of the invention
In view of the above-mentioned problems, it is an object of the invention to propose a kind of Uniderectional DC-DC converter for not depending on pressure algorithm.
The specific constituted mode of the present invention is as follows.
Without the Uniderectional DC-DC converter of Pressure and Control, including the DC-AC transformation being made of modularization multi-level converter
Device；The diode rectifier bridge being connected directly including exchanging output with DC-AC converter.
The above-mentioned Uniderectional DC-DC converter without Pressure and Control, in DC-AC converter, first auxiliary capacitor anode connects
Auxiliary IGBT module is connect, cathode connection clamp diode is incorporated to DC bus anode；Second auxiliary capacitor cathode connection auxiliary
IGBT module, anode connection clamp diode are incorporated to DC bus cathode.In addition to this A phase, B Xiang Yougai in DC-AC converter
Half-bridge submodule, single clamp submodule, full-bridge submodule after making are combined with clamp diode.
The above-mentioned Uniderectional DC-DC converter without Pressure and Control, the exchange side output of DC-AC converter and diode rectification
The exchange side midpoint of bridge is connected directly.
Detailed description of the invention
The following further describes the present invention with reference to the drawings.
Fig. 1 is improved sub-modular structure schematic diagram in A phase；
Fig. 2 is improved sub-modular structure schematic diagram in B phase；
Fig. 3 is the Uniderectional DC-DC converter without Pressure and Control.
Specific embodiment
For the performance and working principle that the present invention is further explained, once in conjunction with attached drawing to constituted mode and work of the invention
It is specifically described as principle.But the Uniderectional DC-DC converter based on the principle is not limited to Fig. 3.
With reference to Fig. 3, without the Uniderectional DC-DC converter of Pressure and Control, including what is be made of modularization multi-level converter
DC-AC converter；The diode rectifier bridge being connected directly including exchanging output with DC-AC converter.
In DC-AC converter, auxiliary capacitor C1Anode is through node Na_03Connection auxiliary IGBT module T1, cathode is through node
Nb_03Connection clamp diode is incorporated to DC bus anode；Auxiliary capacitor C2Cathode is through node Nb_(2n+1)3Connection auxiliary IGBT module
T2, anode is through node Na_(2n+1)3Connection clamp diode is incorporated to DC bus cathode, and wherein n is natural number.DC-AC converter
Middle A phase, B phase are combined by improved half-bridge submodule, single clamp submodule, full-bridge submodule with clamp diode,
In improved submodule there are three port.For i-th of submodule SM in A phasei, wherein the value of i is 1~2n, the son
When module is half-bridge submodule, port Na_i1Connexon module I GBT module midpoint, port Na_i2Connexon module capacitance Ca_iIt is negative
Pole, port Na_i3Through mechanical switch connexon module capacitance Ca_iAnode；When the submodule is single clamp submodule, diode connects
Meet submodule capacitor Ca_iAnode, IGBT module connexon module capacitance Ca_iCathode, while port Na_i1Connexon module I GBT
Module midpoint, port Na_i2Connect diode and IGBT module tie-point, port Na_i3Through additional IGBT module connection submodule electricity
Hold Ca_iAnode；When the submodule is full-bridge submodule, port Na_i1Connect a sub- module I GBT module midpoint, port Na_i2Even
Meet another IGBT module midpoint, port Na_i3Through adding IGBT module connexon module capacitance Ca_iAnode.Port Na_i1、Na_i2
Port N is connected to through conducting wire or bridge arm reactora_(i-1)2、Na_(i+1)1, port Na_i3Port is connected to through clamp diode
Na_(i-1)3、Na_(i+1)3.For i-th of submodule SM in B phasei, wherein the value of i is 1~2n, which is half-bridge submodule
When, port Nb_i1Connexon module capacitance Cb_iAnode, port Nb_i2Connexon module I GBT module midpoint, port Nb_i3Through machinery
Switch connexon module capacitance Cb_iCathode；When the submodule is single clamp submodule, IGBT module connexon module capacitance Cb_i
Anode, diode connexon module capacitance Cb_iCathode, while port Nb_i1Connect IGBT module and diode connection point, port
Nb_i2Connexon module I GBT module midpoint, port Nb_i3Through adding IGBT module connexon module capacitance Cb_iCathode；The submodule
When block is full-bridge submodule, port Nb_i1Connect a sub- module I GBT module midpoint, port Nb_i2Connect another IGBT module
Midpoint, port Nb_i3Through adding IGBT module connexon module capacitance Cb_iCathode.Port Nb_i1、Nb_i2Through conducting wire or bridge arm reactance
Device is connected to port Nb_(i-1)2、Nb_(i+1)1, port Nb_i3Port N is connected to through clamp diodeb_(i-1)3、Nb_(i+1)3。
Under normal circumstances, mechanical switch and additional IGBT module are normally closed in improved submodule, first submodule of A phase
Capacitor Ca_1When bypass, IGBT module T is assisted at this time1It disconnects, submodule capacitor Ca_1With auxiliary capacitor C1Simultaneously by clamp diode
Connection；I-th of submodule capacitor C of A phaseau_iWhen bypass, wherein the value of i is 2~2n, submodule capacitor Ca_iWith submodule capacitor
Ca_i-1Pass through clamp diode parallel connection；Assist IGBT module T2When closure, auxiliary capacitor C2Pass through clamp diode and submodule
Capacitor Ca_2nIt is in parallel.
Under normal circumstances, mechanical switch and additional IGBT module are normally closed in improved submodule, assist IGBT module T1
When closure, auxiliary capacitor C1With first submodule submodule capacitor C of B phaseb_1Pass through clamp diode parallel connection；I-th of son of B phase
Module capacitance Cb_iWhen bypass, wherein the value of i is 1~2n-1, submodule capacitor Cb_iWith submodule capacitor Cb_i+1Pass through clamp
Diodes in parallel；2n sub- module capacitance C of B phaseb_2nWhen bypass, submodule capacitor Cb_2nWith auxiliary capacitor C2Pass through clamp two
Pole pipe is in parallel.Wherein assist IGBT module T1Trigger signal it is consistent with the trigger signal of first submodule of A phase；Assist IGBT
Module T2Trigger signal it is consistent with the trigger signal of B phase n-th submodule.
During DC voltage conversion, each submodule alternately puts into, bypasses, and assists IGBT module T1、T2Alternating is opened
It closes, A, B phase submodule capacitor voltage meet lower column constraint under the action of clamp diode:
UC1≥UCa_1≥UCa_2…≥UCa_n≥UCa_n+1…≥UCa_2n≥UC2
UC1≤UCb_1≤UCb_2…≤UCb_n≤UCb_n+1…≤UCb_2n≤UC2
It follows that during the DC-DC converter realizes DC voltage conversion, it is improved in DC-AC converter
Submodule capacitor voltage meets following constraint condition:
UC1=UCa_1...=UCa_n...=UCa_2n=UCb_1...=UCb_n...=UCb_2n=UC2
By it is above-mentioned illustrate it is found that the Uniderectional DC-DC converter realize DC voltage conversion during, DC-AC
Converter is not necessarily to Pressure and Control.
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 (1)
1. being not necessarily to the Uniderectional DC-DC converter of Pressure and Control, it is characterised in that: including what is be made of modularization multi-level converter
DC-AC converter, the diode rectifier bridge being connected directly including exchanging output with DC-AC converter；Wherein, DC-AC converter
Exchange side output be connected directly with the side midpoint that exchanges of diode rectifier bridge, in DC-AC converter, auxiliary capacitor C1Anode warp
Node Na_03Connection auxiliary IGBT module T1Collector, cathode is through node Nb_03Connect clamp diode D1Anode, with latter three structure
At A, B phase on bridge arm bridge circuit, pass through T1Emitter and D1Cathode is incorporated to DC bus anode；Auxiliary capacitor C2Cathode warp
Node Nb_(2n+1)3Connection auxiliary IGBT module T2Emitter, anode is through node Na_(2n+1)3Connect clamp diode D2Cathode, then
A, B phase lower bridge arm that three is constituted bridge circuit, pass through T2Collector and D2Anode is incorporated to DC bus cathode, and wherein n is nature
Number；A phase, B phase are by improved half-bridge submodule, single clamp submodule, two pole of full-bridge submodule and clamper in DC-AC converter
Pipe is composed, wherein there are three ports for improved bridge arm submodule；For i-th of bridge arm submodule SM in A phasei,
The value of middle i is 1~2n, when which is improved half-bridge submodule, port Na_i1It connects in half-bridge submodule
The midpoint of two IGBT modules, port Na_i2Connexon module capacitance Ca_iCathode, port Na_i3Submodule is connected through mechanical switch
Capacitor Ca_iAnode；When the bridge arm submodule is improved single clamp submodule, diode connects submodule in single clamp submodule
Block capacitor Ca_iAnode, while port Na_i1The midpoint of two IGBT modules, port N in the single clamp submodule of connectiona_i2Connection is single
Clamp diode and IGBT module tie-point, port N in submodulea_i3Connect additional IGBT module emitter and through additional IGBT
Module collector connexon module capacitance Ca_iAnode；When the bridge arm submodule is improved full-bridge submodule, port Na_i1Even
Meet the midpoint of two IGBT modules in one group of full-bridge submodule, port Na_i2Connect two IGBT moulds in another group of full-bridge submodule
The midpoint of block, port Na_i3Connect additional IGBT module emitter and through additional IGBT module collector connexon module capacitance
Ca_iAnode；Port Na_(k+1)1Port N is connected to through conducting wire or bridge arm reactor upwardsa_k2, port Na_(k+1)3Through connecting clamper two
Pole pipe anode is simultaneously connected upwardly to port N through clamp diode cathodea_k3, wherein the value of k is 0~2n；For in B phase i-th
A bridge arm submodule SMi, wherein the value of i is 1~2n, when which is improved half-bridge submodule, port Nb_i1
Connexon module capacitance Cb_iAnode, port Nb_i2Connect the midpoint of two IGBT modules in half-bridge submodule, port Nb_i3Through machine
Tool switchs connexon module capacitance Cb_iCathode；It is single to clamp submodule when the bridge arm submodule is improved single clamp submodule
Interior diode connexon module capacitance Cb_iCathode, while port Nb_i1IGBT module and diode in the single clamp submodule of connection
Tie-point, port Nb_i2The midpoint of two IGBT modules, port N in the single clamp submodule of connectionb_i3Connect additional IGBT module
Emitter and the additional IGBT module collector connexon module capacitance C of warpb_iCathode；The bridge arm submodule is improved full-bridge
When submodule, port Nb_i1Connect the midpoint of two IGBT modules in one group of full-bridge submodule, port Nb_i2Connect another group of full-bridge
The midpoint of two IGBT modules in submodule, port Nb_i3Connect additional IGBT module emitter and through additional IGBT module current collection
Pole connexon module capacitance Cb_iCathode；Port Nb_(k+1)1Port N is connected to through conducting wire or bridge arm reactor upwardsb_k2, port
Nb_(k+1)3Through connection clamper diode cathode and port N is connected upwardly to through clamp diode cathodeb_k3, wherein the value of k is 0
~2n.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610047400.7A CN106998140B (en) | 2016-01-25 | 2016-01-25 | Uniderectional DC-DC converter without Pressure and Control |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610047400.7A CN106998140B (en) | 2016-01-25 | 2016-01-25 | Uniderectional DC-DC converter without Pressure and Control |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN106998140A CN106998140A (en) | 2017-08-01 |
| CN106998140B true CN106998140B (en) | 2019-10-18 |
Family
ID=59428184
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201610047400.7A Active CN106998140B (en) | 2016-01-25 | 2016-01-25 | Uniderectional DC-DC converter without Pressure and Control |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN106998140B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109713898A (en) * | 2017-10-26 | 2019-05-03 | 华北电力大学 | A kind of modular multilevel DC-DC converter topology without AC link |
| CN109167522B (en) * | 2018-08-03 | 2020-12-15 | 昆明理工大学 | MMC topological structure with bidirectional self-voltage-sharing capability |
| CN110417290B (en) * | 2019-07-23 | 2020-09-04 | 国网江苏省电力有限公司扬州供电分公司 | Novel modular multilevel converter submodule topological circuit and control method thereof |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6509725B1 (en) * | 2001-11-09 | 2003-01-21 | International Business Machines Corporation | Self-regulating voltage divider for series-stacked voltage rails |
| CN102170140A (en) * | 2011-04-21 | 2011-08-31 | 中国电力科学研究院 | Method for starting flexible high-voltage direct-current (HVDC) system of modularized multi-level converter |
| CN102832841A (en) * | 2012-08-27 | 2012-12-19 | 清华大学 | Modularized multi-level converter with auxiliary diode |
| 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 |
-
2016
- 2016-01-25 CN CN201610047400.7A patent/CN106998140B/en active Active
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6509725B1 (en) * | 2001-11-09 | 2003-01-21 | International Business Machines Corporation | Self-regulating voltage divider for series-stacked voltage rails |
| CN102170140A (en) * | 2011-04-21 | 2011-08-31 | 中国电力科学研究院 | Method for starting flexible high-voltage direct-current (HVDC) system of modularized multi-level converter |
| CN102832841A (en) * | 2012-08-27 | 2012-12-19 | 清华大学 | Modularized multi-level converter with auxiliary diode |
| 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 |
Non-Patent Citations (1)
| Title |
|---|
| "新型模块化高压大功率DC-DC变换器";赵成勇 等;《电力系统自动化》;20140225;第38卷(第4期);第73页、图1 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN106998140A (en) | 2017-08-01 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN101667789B (en) | Inverter circuit used for solar energy photovoltaic grid connection and device thereof | |
| CN103427657B (en) | A kind of high-voltage DC-DC conversion device | |
| CN110504852B (en) | Single-phase soft switch charger topology with voltage decoupling function and modulation method thereof | |
| CN110768549B (en) | Single-phase zero-voltage soft switching charger topology and modulation method thereof | |
| CN106998152B (en) | Electrical isolation Uniderectional DC-DC converter without Pressure and Control | |
| CN103023362A (en) | Bridgeless inverter circuit and solar bridgeless inverter | |
| CN107546999A (en) | A kind of band active power decouples single-phase ZVT inverter circuit and its modulator approach | |
| CN103457468A (en) | High voltage direct current-direct current transformer | |
| CN103427653A (en) | High-voltage DC-DC conversion device | |
| CN102969898B (en) | Low-voltage wide-input three-level full-bridge converter and control method thereof | |
| CN106998140B (en) | Uniderectional DC-DC converter without Pressure and Control | |
| CN103427652A (en) | High-voltage high-power DC-DC conversion device | |
| CN109067226A (en) | Five lever boosting type inverters of one kind and its control method | |
| CN103326606A (en) | One-phase five-level inverter | |
| CN104467501B (en) | Shoot-through-prevention midpoint clamping type single-phase non-isolated photovoltaic inverter topology | |
| CN106998138B (en) | Bidirectional DC-DC converter without Pressure and Control | |
| CN106899203B (en) | Forward five-level inverter | |
| WO2018113309A1 (en) | Converter | |
| CN106998141B (en) | DC-DC autoconverter without Pressure and Control | |
| CN202334349U (en) | Direct current isolated grid-connected inversion circuit and photovoltaic inversion system | |
| CN106998139B (en) | Electrical isolation bidirectional DC-DC converter without Pressure and Control | |
| CN105515427B (en) | It is topological from pressure without auxiliary capacitor formula full-bridge MMC based on inequality constraints | |
| CN210724554U (en) | Clamping type boosting power conversion circuit structure | |
| CN105450070A (en) | Non-auxiliary-capacitance type half-bridge/full-bridge parallel-serial MMC self-voltage-sharing topology based on inequality constraints | |
| CN105846705B (en) | High frequency isolation type five-electrical level inverter |
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 | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |