CN107257206A - A kind of three end commutator transformers - Google Patents
A kind of three end commutator transformers Download PDFInfo
- Publication number
- CN107257206A CN107257206A CN201710339954.9A CN201710339954A CN107257206A CN 107257206 A CN107257206 A CN 107257206A CN 201710339954 A CN201710339954 A CN 201710339954A CN 107257206 A CN107257206 A CN 107257206A
- Authority
- CN
- China
- Prior art keywords
- voltage source
- direct voltage
- power switch
- chained block
- bridge
- 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.)
- Granted
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
- H02M7/00—Conversion of ac power input into dc power output; Conversion of dc power input into ac power output
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac 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
- H02M7/537—Conversion of dc power input into ac 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, e.g. single switched pulse inverters
- H02M7/5387—Conversion of dc power input into ac 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, e.g. single switched pulse inverters in a bridge configuration
- H02M7/53871—Conversion of dc power input into ac 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, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current
- H02M7/53873—Conversion of dc power input into ac 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, e.g. single switched pulse inverters in a bridge configuration with automatic control of output voltage or current with digital control
-
- 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
- H02M7/42—Conversion of dc power input into ac power output without possibility of reversal
- H02M7/44—Conversion of dc power input into ac power output without possibility of reversal by static converters
- H02M7/48—Conversion of dc power input into ac power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/53—Conversion of dc power input into ac 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
- H02M7/537—Conversion of dc power input into ac 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, e.g. single switched pulse inverters
- H02M7/539—Conversion of dc power input into ac 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, e.g. single switched pulse inverters with automatic control of output wave form or frequency
- H02M7/5395—Conversion of dc power input into ac 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, e.g. single switched pulse inverters with automatic control of output wave form or frequency by pulse-width modulation
Landscapes
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
- Rectifiers (AREA)
Abstract
The invention provides a kind of three end commutator transformer, including three chained blocks being sequentially connected in series, the input of first chained block is connected by bridge arm inductance with the positive pole of the first direct voltage source, the input of second chained block is connected by filter inductance with the positive pole of the second direct voltage source, the input of 3rd chained block is connected by filter inductance with the positive pole of the 3rd direct voltage source, the negative pole of the output end of 3rd chained block respectively with first direct voltage source, the negative pole connection of the negative pole of second direct voltage source and the 3rd direct voltage source；By some semi-bridge type submodules and at least, a bridge-type submodule is composed in series each chained block.
Description
Technical field
The present invention relates to electricity field, in particular it relates to a kind of three end commutator transformer.
Background technology
With the shortage and the aggravation of environmental degradation problem of traditional energy, the renewable and clean energy resource such as wind energy, solar energy
Increasing attention has been obtained using with exploitation.The generations of electricity by new energy such as wind energy, solar energy have intermittence, the spy of randomness
Point, traditional electric network composition and running technology can not adapt to extensive regenerative resource access, and based on customary DC and flexibility
The multi-terminal direct current transmission system and direct current network technology of direct current are the effective means for solving this problem.Because direct current network there is no
Unified standard, existing DC line mostly operates in different voltage class, in order to by the direct current transportation of different voltage class
System interconnects to form direct current network, it is necessary to using commutator transformer (also commonly known as DC-DC converter).Existing high pressure DC-
DC converters can connect two DC transmission systems, if necessary to connect three DC transmission systems simultaneously, then need multiple DC-
DC converters, this can increase system cost.Another scheme is to apply three end commutator transformers (three end DC-DC converters), can
Three DC transmission systems are directly connected to reduce cost and the loss of system.
It is published in IEEE Transactions on Power Electronics document " Quasi two-level
operation of modular multilevel converter for use in a high-power dc
Transformer with dc fault isolation capability ", it is proposed that one kind is become based on modular multilevel
The end DC-DC converter topology of isolated form three of parallel operation (Modular Multilevel Converter, MMC), the converter sheet
It is made up of in matter the MMC of three common ac bus, isolating transformer is used for electrical isolation and transformation.Because converter needs work
Frequency power transformer, and required submodule quantity is big, therefore it is high with cost, loss is big, the low defect of efficiency.
It is published in IEEE Transactions on Power Delivery document " Multiport High-Power
LCL DC Hub for Use in DC Transmission Grids " propose a kind of commutator transformer topology, direct current transformation
Device carries out transformation using LCL circuits, therefore does not need isolating transformer.But the submodule quantity needed for converter is big, therefore
Cost and loss are larger.
It is published in IEEE Transactions on Power Electronics document " Multiport DC-DC
Autotransformer for Interconnecting Multiple High-Voltage DC Systems at Low
Cost " proposes a kind of self coupling type multiterminal DC-DC converter topology.The capacity of transformer compares above-mentioned first text in converter
Offer smaller, and required submodule number is reduced.But converter still needs multiple power frequency isolation transformers, therefore the body of system
Product and cost are higher.
The content of the invention
For defect of the prior art, become it is an object of the invention to provide three low end direct currents of a kind of small volume, cost
Depressor.
The three end commutator transformers provided according to the present invention, including three chained blocks being sequentially connected in series, the first chain type mould
The input of block is connected by bridge arm inductance with the positive pole of the first direct voltage source, and the input of the second chained block passes through filtering
Inductance is connected with the positive pole of the second direct voltage source, and the input of the 3rd chained block passes through filter inductance and the 3rd DC voltage
The positive pole connection in source, the output end of the 3rd chained block negative pole respectively with first direct voltage source, described second
The negative pole connection of the negative pole of direct voltage source and the 3rd direct voltage source；
By some semi-bridge type submodules and at least, a bridge-type submodule is composed in series each chained block.
It is preferred that, the semi-bridge type submodule is made up of an electric capacity and two power switch pipes, the first power switch pipe
It is connected with capacitance cathode, the second power switch pipe is connected with electric capacity negative pole.
It is preferred that, the bridge-type submodule is made up of an electric capacity and four power switch pipes, the first power switch pipe
It is connected with the 3rd power switch pipe with capacitance cathode, the second power switch pipe is connected with the 4th power switch pipe with electric capacity negative pole.
It is preferred that, the magnitude of voltage U of first direct voltage sourcedc1>The magnitude of voltage U of second direct voltage sourcedc2>Institute
State the magnitude of voltage U of the 3rd direct voltage sourcedc3。
It is preferred that, the AC compounent of the output voltage of the chained block is sine wave, square wave and pulse width modulated wave.
Compared with prior art, the present invention has following beneficial effect：
1) submodule capacitor's capacity is greatly reduced, and can reduce converter volume and cost；
2) exchange circulation is smaller, and switching frequency is lower, therefore more efficient.
Brief description of the drawings
By reading the detailed description made with reference to the following drawings to non-limiting example, further feature of the invention,
Objects and advantages will become more apparent upon：
A kind of circuit structure diagram for three end commutator transformer that Fig. 1 provides for the present invention；
The circuit structure diagram for the semi-bridge type submodule that Fig. 2 provides for the present invention；
The circuit structure diagram for the bridge-type submodule that Fig. 3 provides for the present invention；
Fig. 4 is the output voltage schematic diagram of three chained blocks of the invention.
Embodiment
With reference to specific embodiment, the present invention is described in detail.Following examples will be helpful to the technology of this area
Personnel further understand the present invention, but the invention is not limited in any way.It should be pointed out that to the ordinary skill of this area
For personnel, without departing from the inventive concept of the premise, some changes and improvements can also be made.These belong to the present invention
Protection domain.
As shown in figure 1, the three end commutator transformers that the present invention is provided include three chained blocks being sequentially connected in series, chain type mould
The input of block 1 passes through bridge arm inductance LaWith direct voltage source Udc1Positive pole connection, the input of chained block 2 passes through filtering
Inductance Lf1With direct voltage source Udc2Positive pole connection, the input of chained block 3 passes through filter inductance Lf2With direct voltage source
Udc3Positive pole connection, the output end of chained block 3 respectively with direct voltage source Udc1Negative pole, direct voltage source Udc2Negative pole
And direct voltage source Udc3Negative pole connection, wherein Udc1>Udc2>Udc3。
Chained block is in series by multiple submodule, and submodule can be in the semi-bridge type submodule or Fig. 3 in Fig. 2
Bridge-type submodule.Semi-bridge type submodule is made up of an electric capacity and two power switch pipes, the first power switch tube S 1 and electricity
Hold positive pole to be connected, the second power switch tube S 2 is connected with electric capacity negative pole.Bridge-type submodule is opened by an electric capacity and four power
Close pipe to constitute, the first power switch tube S 1, the 3rd power switch tube S 3 be connected with capacitance cathode, the second power switch tube S 2, the
Four power switch tube Ss 4 are connected with electric capacity negative pole.In normal work, submodule use semi-bridge type submodule, if desired every
From DC Line Fault, then part submodule must be using bridge-type submodule, and therefore, each chained block of setting is by some semi-bridge types
Submodule and at least a bridge-type submodule is composed in series.
As shown in figure 4, output voltage (the v of chained block 1,2 and 3Cl1、vCl2、vCl3) it is two level pulse width modulated waves
Shape, dutycycle is respectively d1、d2And d3.There is phase shift in the output voltage of chained block 2, move compared to the output voltage of chained block 1
Phase dutycycle is ds1, there is phase shift in the output voltage of chained block 2, phase shift dutycycle is compared to the output voltage of chained block 1
ds2.Commutator transformer of the present invention is by adjusting phase shift dutycycle ds1And ds2To maintain all submodule capacitor voltages to balance.
The output voltage of all chained blocks includes DC component and AC compounent, the output voltage of chained block 1,2 and 3
DC component be respectively (Udc1-Udc2)、(Udc2-Udc3) and Udc3.Between chained block active power is transmitted by exchanging circulation
To realize the charge and discharge electric equilibrium of submodule electric capacity.The AC compounent of chained block output voltage can be sine wave, square wave and pulsewidth
Modulating wave.
The specific embodiment of the present invention is described above.It is to be appreciated that the invention is not limited in above-mentioned
Particular implementation, those skilled in the art can make a variety of changes or change within the scope of the claims, this not shadow
Ring the substantive content of the present invention.In the case where not conflicting, feature in embodiments herein and embodiment can any phase
Mutually combination.
Claims (5)
1. a kind of three end commutator transformer, it is characterised in that including three chained blocks being sequentially connected in series, the first chained block
Input is connected by bridge arm inductance with the positive pole of the first direct voltage source, and the input of the second chained block passes through filter inductance
It is connected with the positive pole of the second direct voltage source, the input of the 3rd chained block passes through filter inductance and the 3rd direct voltage source
Positive pole is connected, negative pole, second direct current of the output end of the 3rd chained block respectively with first direct voltage source
The negative pole connection of the negative pole of voltage source and the 3rd direct voltage source；
By some semi-bridge type submodules and at least, a bridge-type submodule is composed in series each chained block.
2. three end according to claim 1 commutator transformer, it is characterised in that the semi-bridge type submodule is by an electric capacity
Constituted with two power switch pipes, the first power switch pipe is connected with capacitance cathode, the second power switch pipe and electric capacity negative pole phase
Even.
3. three end according to claim 1 commutator transformer, it is characterised in that the bridge-type submodule is by an electric capacity
Constituted with four power switch pipes, the first power switch pipe is connected with the 3rd power switch pipe with capacitance cathode, and the second power is opened
The power switch pipes of Guan Yu tetra- are closed with electric capacity negative pole to be connected.
4. three end according to claim 1 commutator transformer, it is characterised in that the magnitude of voltage of first direct voltage source
Udc1>The magnitude of voltage U of second direct voltage sourcedc2>The magnitude of voltage U of 3rd direct voltage sourcedc3。
5. three end according to claim 1 commutator transformer, it is characterised in that the friendship of the output voltage of the chained block
Flow component is sine wave, square wave and pulse width modulated wave.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710339954.9A CN107257206B (en) | 2017-05-15 | 2017-05-15 | Three-terminal direct current transformer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710339954.9A CN107257206B (en) | 2017-05-15 | 2017-05-15 | Three-terminal direct current transformer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN107257206A true CN107257206A (en) | 2017-10-17 |
| CN107257206B CN107257206B (en) | 2020-01-07 |
Family
ID=60027529
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201710339954.9A Active CN107257206B (en) | 2017-05-15 | 2017-05-15 | Three-terminal direct current transformer |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN107257206B (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112583268A (en) * | 2020-12-21 | 2021-03-30 | 上海交通大学 | Modular multilevel DC converter |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105375757A (en) * | 2014-08-25 | 2016-03-02 | 国家电网公司 | DC voltage conversion device and bridge arm control method thereof |
| 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 |
| WO2016138949A1 (en) * | 2015-03-04 | 2016-09-09 | Siemens Aktiengesellschaft | Dc to dc converter |
| CN105978332A (en) * | 2016-05-13 | 2016-09-28 | 重庆大学 | IPOS four-level Boost converter and midpoint potential balance control thereof |
| CN106505902A (en) * | 2016-10-13 | 2017-03-15 | 上海交通大学 | LCC/VSC direct currents interconnect transformator |
-
2017
- 2017-05-15 CN CN201710339954.9A patent/CN107257206B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105375757A (en) * | 2014-08-25 | 2016-03-02 | 国家电网公司 | DC voltage conversion device and bridge arm control method thereof |
| WO2016138949A1 (en) * | 2015-03-04 | 2016-09-09 | Siemens Aktiengesellschaft | Dc to dc converter |
| CN105576982A (en) * | 2016-02-02 | 2016-05-11 | 上海交通大学 | Non-isolated DC transformer |
| CN105978332A (en) * | 2016-05-13 | 2016-09-28 | 重庆大学 | IPOS four-level Boost converter and midpoint potential balance control thereof |
| 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 |
| CN106505902A (en) * | 2016-10-13 | 2017-03-15 | 上海交通大学 | LCC/VSC direct currents interconnect transformator |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112583268A (en) * | 2020-12-21 | 2021-03-30 | 上海交通大学 | Modular multilevel DC converter |
Also Published As
| Publication number | Publication date |
|---|---|
| CN107257206B (en) | 2020-01-07 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103208929B (en) | Based on the electronic power transformer of MMC | |
| CN105576982B (en) | Non-isolation type direct-current transformer | |
| US10811983B2 (en) | Power electronic conversion unit and system | |
| CN104702114B (en) | High-frequency-chain bidirectional direct-current transformer with switched capacitor access and control method thereof | |
| CN101741273B (en) | Coupling inductance type double Boost inverter circuits in photovoltaic system | |
| CN109067218B (en) | Solid-state transformer topology construction method based on multi-level sub-modules | |
| CN107786099A (en) | A kind of highly reliable commutator transformer system of segmentation more and its control method | |
| CN203399000U (en) | MMC-based electronic power transformer | |
| CN101521386B (en) | Traction power supply direct hanging type high voltage comprehensive compensation device | |
| WO2018171767A1 (en) | Five-level low-common-mode leakage current single-phase photovoltaic grid-connected inverter and photovoltaic grid-connected system | |
| CN104092400A (en) | Z-source three-level T-type inverter and modulating method thereof | |
| CN107134937A (en) | A kind of three level multiple-pulses output transformerless inverter circuit | |
| CN107592017A (en) | A kind of DC DC converters and control method | |
| CN101867314A (en) | Transform circuit adopting symmetrical cross-linked structure | |
| CN103427658A (en) | High-voltage DC-DC conversion device based on multi-winding transformer | |
| CN102832815A (en) | Three-phase electric and electronic transformer based on multi-level multi-module cascade structure | |
| CN204145305U (en) | A kind of novel DC-AC-DC converter being applied to high voltage direct current transmission | |
| CN106505902B (en) | LCC/VSC direct current interconnects transformer | |
| CN103441676A (en) | Modularized device for conversion between high-voltage direct current and direct current | |
| CN105262355B (en) | A kind of multiport inverter | |
| CN117335666A (en) | Three-port DC-AC converter based on interleaved Boost and double active bridges | |
| CN107257206A (en) | A kind of three end commutator transformers | |
| CN105337495A (en) | High voltage DC/DC converter having fault current blocking capability | |
| CN107834888A (en) | A kind of Transformer-free single-phase photovoltaic inverter of voltage hybrid clamp | |
| CN209562411U (en) | High-frequency-chain bidirectional direct-current transformer connected with bidirectional switch |
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 |