CN103731035A - DC-DC converter based on modular multi-level converter topological structure - Google Patents
DC-DC converter based on modular multi-level converter topological structure Download PDFInfo
- Publication number
- CN103731035A CN103731035A CN201310231622.0A CN201310231622A CN103731035A CN 103731035 A CN103731035 A CN 103731035A CN 201310231622 A CN201310231622 A CN 201310231622A CN 103731035 A CN103731035 A CN 103731035A
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- China
- Prior art keywords
- converter
- phase
- brachium pontis
- topological structure
- voltage
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Classifications
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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
- H02M7/42—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
- H02M7/483—Converters with outputs that each can have more than two voltages levels
- H02M7/4835—Converters with outputs that each can have more than two voltages levels comprising two or more cells, each including a switchable capacitor, the capacitors having a nominal charge voltage which corresponds to a given fraction of the input voltage, and the capacitors being selectively connected in series to determine the instantaneous output voltage
-
- 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
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Inverter Devices (AREA)
Abstract
The invention provides a DC-DC converter based on a modular multi-level converter topological structure and belongs to the technical field of power transmission and distribution. The DC-DC converter is used for solving the problem of high-voltage direct-current conversion of a direct-current power grid in the future. According to the technical scheme, improvement is carried out on the basis of an original MMC topological structure, an original three-phase AC-DC converter is changed to a single-phase AC-DC converter, then two single-phase AC-DC converters are connected in a back-to-back mode, DC-AC-DC conversion is achieved, and accordingly a direct-current conversion function is achieved.
Description
Technical field
The present invention relates to a kind of DC-DC converter based on modularization multi-level converter topological structure, realized high voltage direct current transformation problem, and successfully will determine direct voltage, determine alternating voltage control strategy and be applied in modeling, belong to power transmission and distribution technical field.
Background technology
Modularization multi-level converter high voltage direct current transmission (Modular Multilevel Converter Based High Voltage Direct Current, be called for short MMC-HVDC) be that voltage source converter high voltage direct current transmission (Voltage Source Converter Based High Voltage Direct Current is called for short VSC-HVDC) is in the important branch in many level field.
Compare with traditional two level or three level VSC-HVDC, MMC-HVDC has following major advantage:
(1) modularized design, is convenient to dilatation.
(2) switching frequency is lower, and switching loss is less, and equivalent switching frequency is higher.
(3) converter AC outlet voltage harmonic content is few, without alternating current filter.
Object of the present invention is exactly that the advantage of MMC-HVDC is applied in DC-DC converter, is retaining under the prerequisite of MMC its own advantages, by improving MMC topological structure, reducing investment, realizes high pressure DC-DC mapping function.
Summary of the invention
Technical problem to be solved by this invention is to realize the DC-DC transformation problem of high-power.The present invention adopts following technical scheme to realize:
Novel topological structure improves and obtains on original MMC topological structure basis, and this converter is symmetrical, by two DC-AC links, takes " back-to-back " form to connect DC converting.MMC topological structure consists of three-phase brachium pontis, get one in MMC topological structure as change of current device, with DC-AC link of two series capacitance formations in parallel, DC side circuit respectively has two smoothing reactors to be used for reducing current ripples up and down, from two electric capacity mid points and a phase brachium pontis mid point, take out two circuits as AC circuit respectively, alternating current circuit is connected by a single-phase transformer AC-DC converter identical with opposite side structure.
Be exactly more than the simple introduction that this modular multilevel DC-DC converter is formed, this converter applications, in following direct current network, can realize the conversion of direct voltage.
Accompanying drawing explanation
The many level DC-DC converter topologys of Fig. 1 uniphase mode blocking;
Fig. 2 is the half-bridge submodule topology of using in a phase brachium pontis;
Fig. 3 is the equivalent circuit diagram of modular multilevel DC-DC converter;
Fig. 4 is DC-DC inverter power mode;
Each symbol in figure: in Fig. 1,
l x1 , input smoothing reactor;
l x2 ,output smoothing reactor;
c 1 , input brachium pontis electric capacity;
c 2 , output brachium pontis electric capacity;
l 1, be the reactance of input brachium pontis;
l 2, output brachium pontis reactor;
sMn, a n submodule; T, single phase alternating current (A.C.) transformer; U
in , DC-DC converter input terminal voltage; U
out , output direct voltage; In Fig. 2, the IGBT1 of VT1, submodule half-bridge; The IGBT2 of VT2, submodule half-bridge; VD1, with the antiparallel fly-wheel diode of VT1; VD2, with the antiparallel fly-wheel diode of VT2; U
c , submodule capacitance voltage;
u sm , the output voltage of submodule;
i sm, the output current of submodule.In Fig. 3,
r eq, input brachium pontis substitutional resistance;
r eqoutput substitutional resistance;
u a1, bridge arm equivalent controllable voltage source on input;
u a2, bridge arm equivalent controllable voltage source under input;
u a1, bridge arm equivalent controllable voltage source on output;
u a2, bridge arm equivalent controllable voltage source under output; In Fig. 4,
u ap, A
ppoint voltage to earth;
u ap, a
pthe voltage to earth of point;
k, single phase alternating current (A.C.) transformer no-load voltage ratio.
Embodiment
This modular multilevel DC-DC converter topology left side consists of two brachium pontis, two brachium pontis electric capacity and two smoothing reactors, as shown in Figure 1.Upper and lower two brachium pontis are a phase, submodule (the sub-module that every phase brachium pontis is interconnected by several and structure is identical, SM) be composed in series with two brachium pontis reactors, brachium pontis reactor is used for suppressing the circulation on brachium pontis, and smoothing reactor is used for the ripple in smooth direct current electric current.This DC-DC converter left and right sides structure is identical, by a single phase alternating current (A.C.) transformer, is connected, and AC transformer is used for providing change of current reactance, improves the no-load voltage ratio of converter, plays the effect of " electricity isolation " simultaneously.
As shown in Figure 2, each submodule consists of two IGBT as switch element and a DC energy storage electric capacity submodule topological structure on brachium pontis,
u sMfor the port output voltage of submodule,
i sMfor the electric current of this submodule place brachium pontis,
u ccapacitance voltage for submodule.Each submodule is two ends elements, by controlling VT
1and VT
2turn on and off, submodule output voltage
u sMcan the in the situation that of 2 kinds of senses of current, replace output capacitance voltage simultaneously
u cwith 0.
The upper brachium pontis in converter left side of take is example, total
nindividual submodule, can be by this
nthe total voltage of individual submodule output is equivalent to controllable voltage source.If the submodule quantity of brachium pontis is abundant, by controlling the input of each submodule and cutting out, i.e. the voltage of exportable multiple waveforms.
The submodule number that bidirectional DC-DC converter topology input upper and lower bridge arm puts into operation is
n=
u in/
u c, the submodule number that output upper and lower bridge arm puts into operation is
n=
u out/
u c.A part of submodule is all left as redundancy in two ends, and for the fault recovery under failure condition, or to realize the no-load voltage ratio of transformer adjustable by changing the number of two-terminal module.
In Fig. 3
u a1,
u a2be respectively that A organizes upper and lower bridge arm equivalent controllable voltage source output voltage, expression formula is as follows
In formula,
u cA1i,
u cA2ifor the capacitance voltage of each submodule of A group upper and lower bridge arm, S
a1i, S
a2iswitch function for each submodule of A group upper and lower bridge arm.In Fig. 3
u aothe voltage to earth that A is ordered,
ppoint and
npoint be respectively with respect to the voltage with reference to neutral point o and, meet formula
Two formulas up and down in (2) formula are added, obtain
Formula (3) shows that the submodule voltage summation of any time one phase brachium pontis equals respective side direct voltage.Two capacitor size equate to play the effect of voltage clamp, and the voltage to earth that B is ordered is 0, A point voltage to earth
u ao=
u aB.Modular multilevel DC-DC converter topology left and right structure is identical.
Take A group as example, by A
ppoint and A
npoint short circuit, Fig. 4 is DC-DC inverter power mode.By controlling the switching of submodule, can obtain four controllable voltage sources
u a1,
u a2,
u a1,
u a2waveform output, any time
u a1with
u a2,
u a1with
u a2meet formula (3), then from formula (2)
u ap,
u apsize, by changing
u ap,
u apamplitude and phase angle, just can realize the transmission of meritorious P and idle Q.
Claims (3)
1. the present invention relates to a kind of DC-DC converter based on modularization multi-level converter topological structure, this converter changes and obtains on MMC topological structure basis, mainly by two single-phase DC-AC converters, by " back-to-back " form, be formed by connecting, a single-phase invertor consists of two brachium pontis, two brachium pontis electric capacity and two smoothing reactors.
2. structure according to claim 1, upper and lower two brachium pontis are a phase, the submodule that every phase brachium pontis is interconnected by several and structure is identical and two brachium pontis reactors are composed in series, and two single-phase invertor symmetrical configuration are middle connected by a single phase alternating current (A.C.) transformer.
3. according to the structure described in claim 1 and 2, this topological structure can be realized high voltage direct current mapping function, and switching frequency is low, and loss is little, simple in structure, is easy to expansion.
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| CN201310231622.0A CN103731035A (en) | 2013-06-13 | 2013-06-13 | DC-DC converter based on modular multi-level converter topological structure |
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Cited By (16)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104242720A (en) * | 2014-09-11 | 2014-12-24 | 华南理工大学 | Modular multilevel converter (MMC) of alternating current side cascading H-bridge |
| CN104283436A (en) * | 2014-09-24 | 2015-01-14 | 华中科技大学 | Combined type MMC type direct current transformer based on transformer coupling |
| CN104638940A (en) * | 2015-03-02 | 2015-05-20 | 东南大学 | Modular multi-level power electronic transformer based on cascading |
| CN104702124A (en) * | 2015-01-22 | 2015-06-10 | 西南交通大学 | MMC (Multi Media Card) based single-phase-three-phase conversion system containing capacitor bridge arm |
| CN105099206A (en) * | 2015-08-18 | 2015-11-25 | 南车株洲电力机车研究所有限公司 | Direct current-direct current solid-state transformer |
| CN105429468A (en) * | 2015-11-16 | 2016-03-23 | 上海交通大学 | Modular isolation type battery energy storage convertor and modulation method therefor |
| US9318974B2 (en) | 2014-03-26 | 2016-04-19 | Solaredge Technologies Ltd. | Multi-level inverter with flying capacitor topology |
| WO2016070378A1 (en) * | 2014-11-06 | 2016-05-12 | Abb Technology Ltd | Method and controller for controlling capacitor voltage balancing in modular dc/dc converter and modular dc/dc converter system |
| CN105634305A (en) * | 2015-11-16 | 2016-06-01 | 华北电力大学 | Closed-loop control strategy applicable to high-level modular multilevel converter for quantitatively controlling IGBT average switching frequency |
| DE102015209948A1 (en) * | 2015-05-29 | 2016-12-01 | Siemens Aktiengesellschaft | Voltage transformer arrangement with capacitive coupling |
| CN107546983A (en) * | 2017-01-17 | 2018-01-05 | 湖南大学 | A kind of high-power high no-load voltage ratio modularization two-way DC converter of isolated form |
| EP3291432A1 (en) * | 2016-09-06 | 2018-03-07 | Siemens Aktiengesellschaft | Dual-active-bridge with modular multilevel bridges |
| US9941813B2 (en) | 2013-03-14 | 2018-04-10 | Solaredge Technologies Ltd. | High frequency multi-level inverter |
| CN110138197A (en) * | 2019-04-16 | 2019-08-16 | 浙江大学 | The soft start control method of modular multilevel controlled resonant converter |
| CN111416542A (en) * | 2020-04-09 | 2020-07-14 | 上海交通大学 | Half-bridge type modular multilevel single-phase inverter and modulation method |
| CN112910291A (en) * | 2019-11-19 | 2021-06-04 | 北京金风科创风电设备有限公司 | Converter control method, controller and control equipment and converter system |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102403903A (en) * | 2011-12-14 | 2012-04-04 | 韩古月 | Direct current voltage converter |
| WO2013017160A1 (en) * | 2011-08-01 | 2013-02-07 | Alstom Technology Ltd | A dc to dc converter assembly |
-
2013
- 2013-06-13 CN CN201310231622.0A patent/CN103731035A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013017160A1 (en) * | 2011-08-01 | 2013-02-07 | Alstom Technology Ltd | A dc to dc converter assembly |
| CN102403903A (en) * | 2011-12-14 | 2012-04-04 | 韩古月 | Direct current voltage converter |
Non-Patent Citations (1)
| Title |
|---|
| STEPHAN KENZELMANN等: "A Versatile DC-DC Converter for Energy Collection and Distribution using the Modular Multilevel Converter", 《IEEE》 * |
Cited By (33)
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| US9941813B2 (en) | 2013-03-14 | 2018-04-10 | Solaredge Technologies Ltd. | High frequency multi-level inverter |
| US11742777B2 (en) | 2013-03-14 | 2023-08-29 | Solaredge Technologies Ltd. | High frequency multi-level inverter |
| US11545912B2 (en) | 2013-03-14 | 2023-01-03 | Solaredge Technologies Ltd. | High frequency multi-level inverter |
| US10886832B2 (en) | 2014-03-26 | 2021-01-05 | Solaredge Technologies Ltd. | Multi-level inverter |
| US10886831B2 (en) | 2014-03-26 | 2021-01-05 | Solaredge Technologies Ltd. | Multi-level inverter |
| US10680506B2 (en) | 2014-03-26 | 2020-06-09 | Solaredge Technologies Ltd. | Multi-level inverter |
| US9318974B2 (en) | 2014-03-26 | 2016-04-19 | Solaredge Technologies Ltd. | Multi-level inverter with flying capacitor topology |
| US10404154B2 (en) | 2014-03-26 | 2019-09-03 | Solaredge Technologies Ltd | Multi-level inverter with flying capacitor topology |
| US11632058B2 (en) | 2014-03-26 | 2023-04-18 | Solaredge Technologies Ltd. | Multi-level inverter |
| US11855552B2 (en) | 2014-03-26 | 2023-12-26 | Solaredge Technologies Ltd. | Multi-level inverter |
| US10153685B2 (en) | 2014-03-26 | 2018-12-11 | Solaredge Technologies Ltd. | Power ripple compensation |
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| US10700588B2 (en) | 2014-03-26 | 2020-06-30 | Solaredge Technologies Ltd. | Multi-level inverter |
| CN104242720A (en) * | 2014-09-11 | 2014-12-24 | 华南理工大学 | Modular multilevel converter (MMC) of alternating current side cascading H-bridge |
| CN104283436A (en) * | 2014-09-24 | 2015-01-14 | 华中科技大学 | Combined type MMC type direct current transformer based on transformer coupling |
| WO2016070378A1 (en) * | 2014-11-06 | 2016-05-12 | Abb Technology Ltd | Method and controller for controlling capacitor voltage balancing in modular dc/dc converter and modular dc/dc converter system |
| CN104702124A (en) * | 2015-01-22 | 2015-06-10 | 西南交通大学 | MMC (Multi Media Card) based single-phase-three-phase conversion system containing capacitor bridge arm |
| CN104638940A (en) * | 2015-03-02 | 2015-05-20 | 东南大学 | Modular multi-level power electronic transformer based on cascading |
| DE102015209948A1 (en) * | 2015-05-29 | 2016-12-01 | Siemens Aktiengesellschaft | Voltage transformer arrangement with capacitive coupling |
| CN105099206A (en) * | 2015-08-18 | 2015-11-25 | 南车株洲电力机车研究所有限公司 | Direct current-direct current solid-state transformer |
| CN105429468A (en) * | 2015-11-16 | 2016-03-23 | 上海交通大学 | Modular isolation type battery energy storage convertor and modulation method therefor |
| CN105429468B (en) * | 2015-11-16 | 2018-07-03 | 上海交通大学 | A kind of modularization isolated form battery energy storage converter and its modulator approach |
| CN105634305B (en) * | 2015-11-16 | 2018-04-20 | 华北电力大学 | A kind of closed loop control method of quantitative control IGBT average frequency of switching suitable for high level modularization multi-level converter |
| CN105634305A (en) * | 2015-11-16 | 2016-06-01 | 华北电力大学 | Closed-loop control strategy applicable to high-level modular multilevel converter for quantitatively controlling IGBT average switching frequency |
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| CN107546983A (en) * | 2017-01-17 | 2018-01-05 | 湖南大学 | A kind of high-power high no-load voltage ratio modularization two-way DC converter of isolated form |
| CN107546983B (en) * | 2017-01-17 | 2019-08-02 | 湖南大学 | A kind of high-power high no-load voltage ratio modularization two-way DC converter of isolated form |
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| CN112910291A (en) * | 2019-11-19 | 2021-06-04 | 北京金风科创风电设备有限公司 | Converter control method, controller and control equipment and converter system |
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Application publication date: 20140416 |