CN110492740A - A kind of the decompression self-energizing circuit and method of mesohigh DC distribution net - Google Patents

A kind of the decompression self-energizing circuit and method of mesohigh DC distribution net Download PDF

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Publication number
CN110492740A
CN110492740A CN201910803256.9A CN201910803256A CN110492740A CN 110492740 A CN110492740 A CN 110492740A CN 201910803256 A CN201910803256 A CN 201910803256A CN 110492740 A CN110492740 A CN 110492740A
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China
Prior art keywords
bridge
igbt device
bridge module
full
negative terminal
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CN201910803256.9A
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CN110492740B (en
Inventor
史明明
袁宇波
袁栋
袁晓冬
朱卫平
陈庆
费益军
杨景刚
陶加贵
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State Grid Corp of China SGCC
State Grid Jiangsu Electric Power Co Ltd
Electric Power Research Institute of State Grid Jiangsu Electric Power Co Ltd
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State Grid Corp of China SGCC
State Grid Jiangsu Electric Power Co Ltd
Electric Power Research Institute of State Grid Jiangsu Electric Power Co Ltd
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Publication of CN110492740A publication Critical patent/CN110492740A/en
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    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M3/00Conversion of dc power input into dc power output
    • H02M3/02Conversion of dc power input into dc power output without intermediate conversion into ac
    • H02M3/04Conversion of dc power input into dc power output without intermediate conversion into ac by static converters
    • H02M3/10Conversion of dc power input into dc power output without intermediate conversion into ac by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
    • H02M3/145Conversion of dc power input into dc power output without intermediate conversion into ac 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
    • H02M3/155Conversion of dc power input into dc power output without intermediate conversion into ac 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
    • HELECTRICITY
    • H02GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
    • H02MAPPARATUS 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
    • H02M1/00Details of apparatus for conversion
    • H02M1/0067Converter structures employing plural converter units, other than for parallel operation of the units on a single load

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  • Engineering & Computer Science (AREA)
  • Power Engineering (AREA)
  • Inverter Devices (AREA)

Abstract

The embodiment of the invention discloses a kind of decompression self-energizing circuit of mesohigh DC distribution net and methods.The decompression self-energizing circuit of mesohigh DC distribution net includes N number of half-bridge module and a full-bridge modules, N is the integer more than or equal to 3, half-bridge module includes positive terminal and negative terminal, full-bridge modules include positive terminal and negative terminal, for the 1st to (N-1) a half-bridge module, the positive terminal of 1st half-bridge module is connected with the anode of DC distribution net, the negative terminal of previous half-bridge module is electrically connected with the positive terminal of the latter half-bridge module, the positive terminal electrical connection of the negative terminal and full-bridge modules of (N-1) a half-bridge module, the negative terminal of full-bridge modules is electrically connected with the positive terminal of n-th half-bridge module, the negative terminal of n-th half-bridge module is connected with the cathode of DC distribution net.The technical solution of the embodiment of the present invention solves the secondary circuit powerup issue of mesohigh direct current system, reduces DC distribution net to the dependence of AC system.

Description

A kind of the decompression self-energizing circuit and method of mesohigh DC distribution net
Technical field
The present embodiments relate to DC distribution net fields more particularly to a kind of decompression of mesohigh DC distribution net to ask for It can circuit and method.
Background technique
The research of current DC distribution equipment becomes the new hot spot of electrician's equipment field research.In AC network, high pressure The power supply of equipment secondary circuit both largely is from 220V low-voltage alternating-current or UPS (Uninterruptible Power System, uninterruptible power system) circuit, this power supply plan in AC system have inherent advantage, can use voltage The secondary side of mutual inductor (PT) carries out taking energy, powers to secondary control board.
However, practical value can not be had by being taken by alternating current 220V progress secondary circuit in mesohigh DC grid, Increase dependence of the construction to AC energy of DC distribution net.Therefore, the secondary power supply of mesohigh DC distribution net takes and can set The standby practicability for improving mesohigh DC distribution net is of great significance.
Summary of the invention
The embodiment of the present invention provides the decompression self-energizing circuit and method of a kind of mesohigh DC distribution net, with high in raising The practicability of straightening stream power distribution network.
To realize above-mentioned technical problem, the invention adopts the following technical scheme:
In a first aspect, the embodiment of the invention provides a kind of decompression self-energizing circuits of mesohigh DC distribution net, comprising:
N number of half-bridge module and a full-bridge modules, N are the integer more than or equal to 3;
Half-bridge module includes positive terminal and negative terminal;Full-bridge modules include positive terminal and negative terminal;
The anode of positive terminal and DC distribution net for the the 1st to (N-1) a half-bridge module, the 1st half-bridge module Electrical connection, the negative terminal of previous half-bridge module are electrically connected with the positive terminal of the latter half-bridge module, (N-1) a half-bridge The positive terminal electrical connection of the negative terminal and full-bridge modules of module;The negative terminal of full-bridge modules and n-th half-bridge module Positive terminal electrical connection;
The negative terminal of n-th half-bridge module is connected with the cathode of DC distribution net.
Further, the main loop of power circuit of half-bridge module includes the first IGBT device, the second IGBT device and first capacitor Device draws positive terminal in the first IGBT device and the concatenated midpoint of the second IGBT device, in the emitter of the second IGBT device Draw negative terminal.
Further, the collector of the first IGBT device is electrically connected with the first end of first capacitor device, the first IGBT device Emitter and the collector of the second IGBT device be electrically connected positive terminal as half-bridge module;
The emitter of second IGBT device and the second end of first capacitor device are electrically connected the negative terminal as half-bridge module.
Further, the main loop of power circuit of full-bridge modules includes third IGBT device, the 4th IGBT device, the 5th IGBT device Part, the 6th IGBT device and the second capacitor composition, third IGBT device and the 4th IGBT device constitute the first half-bridge structure electricity Road, the 5th IGBT device and the 6th IGBT device constitute the second half-bridge structure circuit, the first half-bridge structure circuit and the second half-bridge Structural circuit is connected in series, and draws anode respectively at the concatenated midpoint of the first half-bridge structure circuit and the second half-bridge structure circuit Terminal and negative terminal.
Further, the of the collector and the second capacitor of the collector of third IGBT device and the 5th IGBT device One end electrical connection;
The emitter of third IGBT device is electrically connected with the collector of the 6th IGBT device, the positive terminal as full-bridge modules Son;
Emitter, the emitter of the 4th IGBT device and the second end of the second capacitor of 6th IGBT device are electrically connected It connects;
The collector of 4th IGBT device is electrically connected with the emitter of the 5th IGBT device, as the negative of the full-bridge modules Extreme son.
Further, the circuit further include:
DC-DC buck converter, the first capacitor device of the input terminal and n-th half-bridge module of DC-DC buck converter Both ends electrical connection.
Second aspect, the embodiment of the invention also provides a kind of decompression self-energizing methods of mesohigh DC distribution net, answer Decompression self-energizing circuit for mesohigh DC distribution net described in first aspect, which comprises
The pulse width modulated wave of low switching frequency is used using control mode, N number of half-bridge module is shifted to for N number of half-bridge module Shape, the phase of the triangular carrier of each half-bridge module successively poor 2 π/(N-R-1).
Further, bipolar modulation strategy is used for full-bridge modules, the both ends of full-bridge modules export square-wave waveform.
The decompression self-energizing circuit of mesohigh DC distribution net provided in an embodiment of the present invention includes N number of half-bridge module and one A full-bridge modules, N are the integer more than or equal to 3, and half-bridge module includes positive terminal and negative terminal, and full-bridge modules include anode Terminal and negative terminal, for the positive terminal and DC distribution net of the the 1st to (N-1) a half-bridge module, the 1st half-bridge module Anode electrical connection, the negative terminal of previous half-bridge module is electrically connected with the positive terminal of the latter half-bridge module, (N-1) The positive terminal electrical connection of the negative terminal and full-bridge modules of a half-bridge module, the negative terminal and n-th half-bridge of full-bridge modules The positive terminal of module is electrically connected, and the negative terminal of n-th half-bridge module is connected with the cathode of DC distribution net.The present invention is implemented Example solves the problems, such as system pressure resistance by N number of half-bridge module and a full-bridge modules superposition, realizes high from this mesohigh direct current system The circuit topology of piezoelectricity source self-energizing solves the secondary circuit powerup issue of mesohigh direct current system, eliminates direct current To the demand of low-voltage alternating-current route and uninterruptible power supply in net process of construction, dependence of the DC distribution net to AC system is reduced Property, there is important value for the popularization and application of DC distribution net.
Detailed description of the invention
To describe the technical solutions in the embodiments of the present invention more clearly, institute in being described below to the embodiment of the present invention Attached drawing to be used is needed to be briefly described, it should be apparent that, the accompanying drawings in the following description is only some implementations of the invention Example, for those of ordinary skill in the art, without creative efforts, can also implement according to the present invention The content of example and these attached drawings obtain other attached drawings.
Fig. 1 is a kind of structural representation of the decompression self-energizing circuit of mesohigh DC distribution net provided in an embodiment of the present invention Figure;
Fig. 2 is a kind of half-bridge module of the decompression self-energizing circuit of mesohigh DC distribution net provided in an embodiment of the present invention Structural schematic diagram;
Fig. 3 is a kind of full-bridge modules of the decompression self-energizing circuit of mesohigh DC distribution net provided in an embodiment of the present invention Structural schematic diagram;
Fig. 4 is that the structure of the decompression self-energizing circuit of another mesohigh DC distribution net provided in an embodiment of the present invention is shown It is intended to;
Fig. 5 is a kind of half-bridge module of the decompression self-energizing circuit of mesohigh DC distribution net provided in an embodiment of the present invention Drive waveforms schematic diagram;
Fig. 6 is a kind of full-bridge modules of the decompression self-energizing circuit of mesohigh DC distribution net provided in an embodiment of the present invention Drive waveforms schematic diagram.
Specific embodiment
The present invention is described in further detail with reference to the accompanying drawings and examples.It is understood that this place is retouched The specific embodiment stated is used only for explaining the present invention rather than limiting the invention.It also should be noted that in order to just Only the parts related to the present invention are shown in description, attached drawing rather than entire infrastructure.
The embodiment of the present invention provides a kind of decompression self-energizing circuit of mesohigh DC distribution net.Fig. 1 is implementation of the present invention A kind of structural schematic diagram of the decompression self-energizing circuit for mesohigh DC distribution net that example provides.Referring to Fig. 1, the embodiment of the present invention The decompression self-energizing circuit of the mesohigh DC distribution net of offer, including N number of half-bridge module 1 and a full-bridge modules 2, N are big In the integer for being equal to 3;Half-bridge module 1 includes positive terminal and negative terminal;Full-bridge modules 2 include positive terminal and negative pole end Son;It is electrically connected for the anode of the positive terminal and DC distribution net of the the 1st to (N-1) a half-bridge module 1, the 1st half-bridge module 1 It connects, the negative terminal of previous half-bridge module 1 is electrically connected with the positive terminal of the latter half-bridge module 1, (N-1) a half-bridge mould The positive terminal electrical connection of the negative terminal and full-bridge modules 2 of block 1;The negative terminal and n-th half-bridge module 1 of full-bridge modules 2 Positive terminal electrical connection;The negative terminal of n-th half-bridge module 1 is connected with the cathode of DC distribution net.
Specifically, the decompression of the anode of mesohigh DC distribution net and cathode both ends access mesohigh DC distribution net is asked for Energy circuit, is converted to secondary DC voltage for the DC voltage of mesohigh.The quantity N of half-bridge module 1 by half-bridge module 1 direct current Voltage rating U1N, redundancy R determine, be calculated especially by such as formula:
N=(Udc/U1N)+R+1
Wherein, Udc is the voltage rating of DC distribution net, U1NFor 1 DC rated voltage of half-bridge module, R is redundancy, N For the integer more than or equal to 3.
Redundancy refers to that the ability that circuit continues to run after 1 failure of half-bridge module, redundancy are that R indicates R half-bridge module 1 After failure operation, entire circuit still is able to the ability continued to run, such as redundancy is 1, i.e. 11 failure operation of half-bridge module Afterwards, the decompression self-energizing circuit of entire mesohigh DC distribution net still is able to continue to run.
By the way that N number of half-bridge module 1 and a full-bridge modules 2 are superimposed, while meeting the needs of system power transmitting, solution Certainly mesohigh DC distribution net system pressure resistance problem, the voltage-to-ground of n-th half-bridge module 1 is minimum, by n-th half-bridge module 1 Output end as mesohigh DC distribution net decompression self-energizing circuit DC output end, meet secondary circuit power supply need It asks.
The decompression self-energizing circuit of mesohigh DC distribution net provided in an embodiment of the present invention includes N number of half-bridge module and one A full-bridge modules, N are the integer more than or equal to 3, by the way that it is resistance to solve system by N number of half-bridge module and a full-bridge modules superposition Pressure problem realizes the circuit topology from this mesohigh direct current system high-voltage electricity source self-energizing, solves mesohigh direct current system Secondary circuit powerup issue, eliminate the demand in DC grid process of construction to low-voltage alternating-current route and uninterruptible power supply, DC distribution net is reduced to the dependence of AC system, there is important value for the popularization and application of DC distribution net.
Optionally, Fig. 2 is a kind of decompression self-energizing circuit of mesohigh DC distribution net provided in an embodiment of the present invention The structural schematic diagram of half-bridge module.Referring to fig. 2, the main loop of power circuit of half-bridge module 1 includes the first IGBT device 11, the 2nd IGBT Device 12 and first capacitor device 13 draw positive terminal in the first IGBT device 11 and the concatenated midpoint of the second IGBT device 12, Negative terminal is drawn in the emitter of the second IGBT device 12.
Specifically, the first IGBT device 11 can be set to be driven by the first drive module, the second IGBT device 12 is by second Drive module driving, wherein the second drive module drives the second IGBT device 12, Yi Ji with the charge on first capacitor device 13 One drive module alternately again charges to first capacitor device 13 when it is driven by high voltage source.First IGBT device 11 and Two IGBT devices 12 respectively include diode, and diode plays afterflow.
Optionally, the collector of the first IGBT device 11 is electrically connected with the first end 131 of first capacitor device 13, the first IGBT The emitter of device 11 and the collector of the second IGBT device 12 are electrically connected the positive terminal as half-bridge module 1, the 2nd IGBT The emitter of device 12 and the second end 132 of first capacitor device 13 are electrically connected the negative terminal as half-bridge module 1.
Specifically, for the positive terminal of the the 1st to (N-1) a half-bridge module 1, the 1st half-bridge module 1 and DC distribution The anode electrical connection of net, the negative terminal of previous half-bridge module 1 are electrically connected with the positive terminal of the latter half-bridge module 1, the (N-1) positive terminal of the negative terminal of a half-bridge module 1 and full-bridge modules 2 is electrically connected.The positive terminal of n-th half-bridge module 1 Son is electrically connected with the negative terminal of full-bridge modules 2, and the negative terminal of n-th half-bridge module 1 is connected with the cathode of DC distribution net, The first end 131 and second end 132 of the first capacitor device 13 of n-th half-bridge module 1 draw the output end of half-bridge module 1 respectively, The DC output end of decompression self-energizing circuit as mesohigh DC distribution net, meets the needs of secondary circuit power supply.For N A half-bridge module 1 can be using control mode be shifted to, and N number of half-bridge module 1 uses the pulse-width modulation waveform of low switching frequency, fifty-fifty The phase of the triangular carrier of bridge module 1 successively poor 2 π/(N-R-1).
Optionally, Fig. 3 is a kind of decompression self-energizing circuit of mesohigh DC distribution net provided in an embodiment of the present invention The structural schematic diagram of full-bridge modules 2.Referring to Fig. 3, the main loop of power circuit of full-bridge modules 2 includes third IGBT device the 21, the 4th IGBT device 23, the 5th IGBT device 22, the 6th IGBT device 24 and the second capacitor 25 composition, third IGBT device 21 and the Four IGBT devices 23 constitute the first half-bridge structure circuit, and the 5th IGBT device 22 and the 6th IGBT device 24 constitute the second half-bridge knot Structure circuit, the first half-bridge structure circuit and the second half-bridge structure circuit are connected in series, in the first half-bridge structure circuit and the second half Positive terminal and negative terminal are drawn respectively in the concatenated midpoint of bridge structural circuit.
Specifically, right when the first half-bridge structure circuit conducting that third IGBT device 21 and the 4th IGBT device 23 are constituted When the second half-bridge structure circuit conducting that the charging of the second capacitor 25, the 5th IGBT device 22 and the 6th IGBT device 24 are constituted, It charges to the second capacitor 25, realizes that full bridge power conversion, the addition of full-bridge modules 2 meet the needs of power transfer, in realization The circuit requirements of the decompression self-energizing circuit of high voltage direct current power distribution network.
Optionally, the collector and the second capacitor 25 of the collector of third IGBT device 21 and the 5th IGBT device 22 First end 251 be electrically connected;The emitter of third IGBT device 21 is electrically connected with the collector of the 6th IGBT device 24, as complete The positive terminal of bridge module 2;The emitter and the second capacitor of the emitter of 6th IGBT device 24, the 4th IGBT device 23 25 second end 252 is electrically connected;The collector of 4th IGBT device 23 is electrically connected with the emitter of the 5th IGBT device 22, as The negative terminal of the full-bridge modules 2.
Specifically, bipolar modulation strategy, the positive terminal and cathode of full-bridge modules 2 can be used for full-bridge modules 2 Square-wave waveform is exported between terminal.
Optionally, Fig. 4 is the decompression self-energizing circuit of another mesohigh DC distribution net provided in an embodiment of the present invention Structural schematic diagram.Referring to fig. 4, the circuit further include: DC-DC buck converter 3, the input of DC-DC buck converter 3 End 31 is electrically connected with the both ends of the first capacitor device 13 of n-th half-bridge module 1.
Specifically, the both ends electricity of the first capacitor device 13 of the input terminal of DC-DC buck converter 3 and n-th half-bridge module 1 Connection, the low-voltage power supply that is depressured self-energizing circuit of the output end 32 of DC-DC buck converter 3 as mesohigh DC distribution net Output port of power source 4.The rated primary voltage of DC-DC buck converter 3 is 1 DC rated voltage U of half-bridge module1N, DC-DC The rated secondary voltage of buck converter 3 can be with flexible design, it is preferable that the specified electricity of the secondary side of DC-DC buck converter 3 Pressure is 110V or 375V.The topological structures such as buck, flyback may be selected in DC-DC buck converter 3.
The embodiment of the invention also provides a kind of decompression self-energizing methods of mesohigh DC distribution net, are applied to above-mentioned The decompression self-energizing circuit of mesohigh DC distribution net described in embodiment of anticipating, which comprises
The pulsewidth modulation of low switching frequency is used using control mode, N number of half-bridge module 1 is shifted to for N number of half-bridge module 1 Waveform, the phase of the triangular carrier of each half-bridge module 1 successively poor 2 π/(N-R-1).
Specifically, Fig. 5 is a kind of decompression self-energizing circuit of mesohigh DC distribution net provided in an embodiment of the present invention The schematic diagram of the drive waveforms of half-bridge module.Referring to Fig. 5, N number of half-bridge module 1 is realized using phase-shift control mode, N number of half Bridge module 1 is all made of the pulse-width modulation waveform of low switching frequency, and the modulating wave of each half-bridge module 1 is triangular carrier, each half-bridge mould The phase of the triangular carrier of block 1 successively poor 2 π/(N-R-1), obtain the control waveform phase of each half-bridge module 1 successively poor 2 π/ (N-R-1), the complementary conducting of the first IGBT device 11 and the second IGBT device 12 of each half-bridge module 1, each half-bridge module 1 The low and high level of the drive waveforms of first IGBT device 11 and the second IGBT device 12 is complementary.
Optionally, bipolar modulation strategy is used for full-bridge modules 2, the both ends of full-bridge modules 2 export square-wave waveform.
Specifically, Fig. 6 is a kind of decompression self-energizing circuit of mesohigh DC distribution net provided in an embodiment of the present invention The schematic diagram of the drive waveforms of full-bridge modules.Referring to Fig. 6, bipolar modulation strategy, full-bridge modules 2 are used for full-bridge modules 2 Both ends output drive waveforms be square wave.
Note that the above is only a better embodiment of the present invention and the applied technical principle.It will be appreciated by those skilled in the art that The invention is not limited to the specific embodiments described herein, be able to carry out for a person skilled in the art it is various it is apparent variation, It readjusts and substitutes without departing from protection scope of the present invention.Therefore, although being carried out by above embodiments to the present invention It is described in further detail, but the present invention is not limited to the above embodiments only, without departing from the inventive concept, also It may include more other equivalent embodiments, and the scope of the invention is determined by the scope of the appended claims.

Claims (8)

1. a kind of decompression self-energizing circuit of mesohigh DC distribution net characterized by comprising
N number of half-bridge module and a full-bridge modules, N are the integer more than or equal to 3;
The half-bridge module includes positive terminal and negative terminal;The full-bridge modules include positive terminal and negative terminal;
The positive terminal and DC distribution for the the 1st to (N-1) a half-bridge module, the 1st half-bridge module The anode electrical connection of net, the anode of the negative terminal and half-bridge module described in the latter of the previous half-bridge module Terminal electrical connection, the negative terminal of (N-1) a described half-bridge module and the positive terminal electricity of the full-bridge modules Connection;The negative terminal of the full-bridge modules is electrically connected with the positive terminal of half-bridge module described in n-th;
The negative terminal of half-bridge module described in n-th is connected with the cathode of DC distribution net.
2. circuit according to claim 1, which is characterized in that
The main loop of power circuit of the half-bridge module includes the first IGBT device, the second IGBT device and first capacitor device, described The positive terminal is drawn at first IGBT device and the concatenated midpoint of second IGBT device, in second IGBT device Emitter draws the negative terminal.
3. circuit according to claim 2, which is characterized in that
The collector of first IGBT device is electrically connected with the first end of the first capacitor device, first IGBT device Emitter and the collector of second IGBT device are electrically connected the positive terminal as the half-bridge module;
The second end of the emitter of second IGBT device and the first capacitor device is electrically connected as the half-bridge module Negative terminal.
4. circuit according to claim 1, which is characterized in that
The main loop of power circuit of the full-bridge modules includes third IGBT device, the 4th IGBT device, the 5th IGBT device, the 6th IGBT device and the second capacitor composition, the third IGBT device and the 4th IGBT device constitute the first half-bridge structure circuit, 5th IGBT device and the 6th IGBT device constitute the second half-bridge structure circuit, the first half-bridge structure circuit and The second half-bridge structure circuit is connected in series, in the string of the first half-bridge structure circuit and the second half-bridge structure circuit The positive terminal and the negative terminal are drawn respectively in the midpoint of connection.
5. circuit according to claim 4, which is characterized in that
The collector of the third IGBT device and the collector of the 5th IGBT device and the first end of the second capacitor Electrical connection;
The emitter of the third IGBT device is electrically connected with the collector of the 6th IGBT device, as the full-bridge modules The positive terminal;
The second of the emitter of 6th IGBT device, the emitter of the 4th IGBT device and second capacitor End electrical connection;
The collector of 4th IGBT device is electrically connected with the emitter of the 5th IGBT device, as the full-bridge modules The negative terminal.
6. circuit according to claim 2, which is characterized in that further include:
DC-DC buck converter, described first of half-bridge module described in the input terminal and n-th of the DC-DC buck converter The both ends of capacitor are electrically connected.
7. a kind of decompression self-energizing method of mesohigh DC distribution net, which is characterized in that be applied in described in claim 1 The decompression self-energizing circuit of high voltage direct current power distribution network, which comprises
The pulsewidth tune of low switching frequency is used using control mode, N number of half-bridge module is shifted to for N number of half-bridge module Waveform processed, the phase of the triangular carrier of each half-bridge module successively poor 2 π/(N-R-1).
8. the method according to the description of claim 7 is characterized in that
Bipolar modulation strategy is used for the full-bridge modules, the both ends of the full-bridge modules export square-wave waveform.
CN201910803256.9A 2019-08-28 2019-08-28 Voltage-reduction self-energy-taking circuit and method for medium-high voltage direct-current power distribution network Active CN110492740B (en)

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Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203166539U (en) * 2012-07-13 2013-08-28 中电普瑞科技有限公司 HVDC and UPFC system based on modularized multilevel converter
CN104993510A (en) * 2015-08-06 2015-10-21 国家电网公司 Flexible DC power transmission system based on modularized multi-level converter
CN105119508A (en) * 2015-09-18 2015-12-02 山东建筑大学 Modularized multi-level current converter with hybrid-cascaded full-bridge and half-bridge sub-modules and starting method thereof
JP2016163513A (en) * 2015-03-05 2016-09-05 三菱電機株式会社 Power conversion device
CN107453635A (en) * 2017-09-01 2017-12-08 东南大学 A kind of hybrid modular multi-level converter topological structure of n+1 and its control strategy

Patent Citations (5)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN203166539U (en) * 2012-07-13 2013-08-28 中电普瑞科技有限公司 HVDC and UPFC system based on modularized multilevel converter
JP2016163513A (en) * 2015-03-05 2016-09-05 三菱電機株式会社 Power conversion device
CN104993510A (en) * 2015-08-06 2015-10-21 国家电网公司 Flexible DC power transmission system based on modularized multi-level converter
CN105119508A (en) * 2015-09-18 2015-12-02 山东建筑大学 Modularized multi-level current converter with hybrid-cascaded full-bridge and half-bridge sub-modules and starting method thereof
CN107453635A (en) * 2017-09-01 2017-12-08 东南大学 A kind of hybrid modular multi-level converter topological structure of n+1 and its control strategy

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