CN107834854A - A kind of high-voltage large-capacity commutator transformer - Google Patents
A kind of high-voltage large-capacity commutator transformer Download PDFInfo
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- CN107834854A CN107834854A CN201711188840.5A CN201711188840A CN107834854A CN 107834854 A CN107834854 A CN 107834854A CN 201711188840 A CN201711188840 A CN 201711188840A CN 107834854 A CN107834854 A CN 107834854A
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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
- 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
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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
- 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
- H02M3/285—Single converters with a plurality of output stages connected in parallel
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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
- 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
- H02M1/0074—Plural converter units whose inputs are connected in series
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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
- 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
- H02M1/0077—Plural converter units whose outputs are connected in series
-
- 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
- H02M1/32—Means for protecting converters other than automatic disconnection
- H02M1/325—Means for protecting converters other than automatic disconnection with means for allowing continuous operation despite a fault, i.e. fault tolerant converters
Abstract
A kind of high-voltage large-capacity commutator transformer provided by the invention, include the modularization DC DC units of n identical input series connection output end series connection, wherein n is any positive integer；DC DC units include input side interface circuit, input lateral capacitance, ITVDC converter unit, output lateral capacitance and the outlet side interface circuit being sequentially connected；Input side interface circuit and outlet side interface circuit are matched with the transformer voltage ratio in ITVDC converter unit all the time by the DC voltage that controlling switch pipe conducting state adjusts input lateral capacitance and exports lateral capacitance respectively.By the present invention in that transformer both ends DC voltage matches all the time with transformer voltage ratio, and ensure failure bypass, the efficiency and reliability of high-voltage large-capacity commutator transformer can be effectively improved.
Description
Technical field
The invention belongs to technical field of electric power, is related to solid-state transformer, more particularly to suitable for Large Copacity HVDC
The high-voltage large-capacity commutator transformer of transmission of electricity (abbreviation HVDC).
Background technology
In order to realize high DC distribution net, middle straightening stream distribution bus and low-voltage direct micro-capacitance sensor bus or various different straight
The connection of the load of voltage class, energy-storage system and distributed power generation is flowed, commutator transformer is widely studied.
For Large Copacity D.C. high voltage transmission (abbreviation HVDC) transmission system, due to being by different regional HVDCs
Power network is formed, and the voltage class of these different high-voltage direct current power grids also likely to be present difference, it is therefore desirable to passes through high pressure DC-
DC converters interconnect the high-voltage direct current power grid of different voltage class, to realize the Power Exchange of high-voltage direct current power grid and trend control
System.But existing high pressure DC-DC converter fluctuates so that both ends direct current in energy transmission because DC bus-bar voltage is present
Voltage mismatches with transformer, causes larger circulation, and then very big current stress occur so that high pressure DC-DC converter
Efficiency reduces.In addition, dc bus break down or high pressure DC-DC converter inside subelement break down when will be to whole
The input-output characteristic of individual high pressure DC-DC converter has an impact, or even causes to damage, and causes system out of service, reliability
It is poor.
The content of the invention
In view of this, the present invention provides a kind of high-voltage large-capacity direct current transformation suitable for Large Copacity D.C. high voltage transmission
Device, by making transformer both ends DC voltage be matched all the time with transformer voltage ratio, and ensure failure bypass, height can be effectively improved
Press the efficiency and reliability of high-capacity direct convertor transformer.
To reach above-mentioned purpose, technical scheme is as follows：
A kind of high-voltage large-capacity commutator transformer, include the modularization DC- of n identical input series connection output end series connection
DC units, wherein n are any positive integer；It is input side interface circuit that DC-DC units include being sequentially connected, input lateral capacitance, straight
Current converter unit, output lateral capacitance and outlet side interface circuit；Input side interface circuit and outlet side interface circuit lead to respectively
Cross controlling switch pipe conducting state regulation input lateral capacitance and output lateral capacitance DC voltage all the time with ITVDC converter unit
In transformer voltage ratio matching.
Further, input side limiting circuit is serially connected between input side interface circuit and input lateral capacitance, exports side interface
Outlet side limiting circuit is serially connected between circuit and output lateral capacitance, input side limiting circuit and outlet side limiting circuit are respectively used to
The climbing of voltage and current during limitation input side interface circuit and outlet side interface circuit switching tube turn on and off.
Further, input side limiting circuit and input side limiting circuit include buffering electric capacity and buffering reactance, buffering
Electric capacity is connected to the respective side interface circuit connecting side of buffering reactance by diode；The positive pole of electric capacity is buffered also by buffering electricity
Resistance is connected to the respective side capacitance cathode connecting side of buffering reactance；The negative pole of buffering electric capacity connects with corresponding lateral capacitance negative pole.
Further, input side interface circuit and outlet side interface circuit include the first switch pipe being serially connected and the
Two switching tubes, input side interface circuit and outlet side interface circuit the first switch pipe and second switch by turning in turn respectively
Pipe, the pulse voltage for being D in input side and outlet side difference output duty cycle.
Further, first switch pipe collector is connected with respective side capacitance cathode, second switch pipe emitter stage with it is corresponding
Lateral capacitance negative pole is connected, and reverse parallel connection has diode respectively for first switch pipe, second switch pipe.
Further, in the modularization DC-DC units of n identical input series connection output end series connection, the first DC-DC is mono-
First connection terminal of member passes through the direct current reactance, first switch device, second switch device and the input side high pressure that are serially connected
The positive pole in source is connected；3rd connection terminal of the first DC-DC units by the direct current reactance that is serially connected, first switch device,
Second switch device is connected with the positive pole of outlet side high-voltage power supply；Second switch device is parallel with delay startup resistance, second switch device
Part is by switching open and close controlling delay startup resistance access circuit.
Further, in the modularization DC-DC units of n identical input series connection output end series connection, m+1 platforms DC-
Second connection end with m platform DC-DC units, the 4th are connected the first connection terminal, the 3rd connection terminal of DC units respectively
Terminal is connected, 1≤m<n；Second connection end of n-th DC-DC unit is connected with inputting the negative pole of high-voltage power supply, the 4th connection end
Sub- T4It is connected with the negative pole for exporting high-voltage power supply
Further, ITVDC converter unit includes input circuit, isolating transformer and the output circuit being sequentially connected, institute
State input full-bridge circuit and export full-bridge circuit using H of the construction of switch of switching device anti-parallel diodes as bridge arm
Full bridge structure or half-bridge structure.
Further, in the modularization DC-DC units of n identical input series connection output end series connection, adjacent DC-DC is mono-
Member has 120 degree of phase shifting angle between the pulse voltage of same side ports output.
The beneficial effects of the invention are as follows：
(1) switching tube in high-voltage large-capacity commutator transformer interface circuit provided by the invention is operated in PWM state,
The regulation of input lateral capacitance and outlet side capacitor direct current voltage can be realized so that input lateral capacitance and the direct current for exporting lateral capacitance
Voltage matches with ITVDC converter unit isolating transformer no-load voltage ratio all the time, so as to have highest efficiency.
(2) adjacent DC-DC units have 120 degree of phase shifting angle between the pulse voltage that same side ports export, so as to
So that the switching frequency of input or output series connection end output voltage is n times of each input interface unit output voltage, so as to
To reduce the current ripples of input HVDC ports.
(3) when a certain DC-DC units break down, disconnected and closed by switching tube, by failure DC-DC units
Road；When short trouble occurs in HVDC ports 1 or HVDC ports 2, all DC-DC unit switch pipes disconnect；So as to effectively carry
The reliability of high high-voltage large-capacity commutator transformer.
Brief description of the drawings
By the description to the embodiment of the present invention referring to the drawings, above-mentioned and other purpose of the invention, feature and
Advantage will be apparent from, in the accompanying drawings：
Fig. 1 is high-voltage large-capacity commutator transformer topology diagram provided by the invention；
Fig. 2 is high-voltage large-capacity commutator transformer ideal operation waveform provided by the invention；
Fig. 3 is half-bridge structure commutator transformer unit provided by the invention.
Embodiment
Below based on embodiment, present invention is described, but the present invention is not restricted to these embodiments.
Example embodiment is described more fully with now with reference to accompanying drawing；However, example embodiment can be in different forms
It is implemented and should not be construed as being limited to the embodiment illustrated herein.On the contrary, these embodiments are provided to enable this public affairs
It is comprehensive and complete to open, and will fully pass on illustrative embodiments to those skilled in the art.Identical label
All the time identical element is represented.
It will also be understood that when an element be referred to as another element " between ", " being connected to " or " being attached to " another element
When, the element can directly between another element, be directly connected to or be attached to another element, or there may be cental element
Part.On the contrary, when an element be referred to as " direct " another element " between ", direct " being connected to " or " being attached to " another element
When, in the absence of intermediary element.
As shown in figure 1, a kind of high-voltage large-capacity commutator transformer provided by the invention, is serially connected in HVDC ports 1 and HVDC
Between port 2, for realizing high-voltage large-capacity DC converting and power transmission, including the modular DC-DC units of n identical：
DC-DC units 1, DC-DC units 2 ... submodule unit n, wherein n are any positive integer, and n DC-DC unit input
Series/parallel, output end series/parallel, for example input series connection, the form of output end series connection, such n DC- can be used
DC unit inputs sum is equal to the voltage of HVDC ports 1, and n DC-DC unit output ends sum is equal to the voltage of HVDC ports 2.When
The other forms such as input series connection output end parallel connection can also so be used.Series unit number flexibly is used, reasonable selection can close
The pressure-resistant and through-current capability of disconnected device, the DC converter for different voltage class conversion application scenario can be designed.
For ease of description, only illustrated below by taking the applicable cases that HVDC ports 1 input, HVDC ports 2 export as an example.
It may be equally applicable for the applicable cases that HVDC ports 2 input, HVDC ports 1 export.
Wherein, the first connection terminal T of DC-DC units 11Pass through the direct current reactance L being serially connected1, switching device K11、K12
It is connected with the positive pole of HVDC ports 1；Switching device K12It is parallel with delay startup resistance R1, by switching open and close controlling delay startup resistance
R1Access circuit；Similar, the 3rd connection terminal T of DC-DC units 13Pass through the direct current reactance L being serially connected2, switching device
K21、K22It is connected with the positive pole of HVDC ports 2；Switching device K22It is parallel with delay startup resistance R2, by switching, open and close controlling is slow to be opened
Dynamic resistance R2Access circuit.
First connection terminal T of m+1 platform DC-DC units1, the 3rd connection terminal T3Respectively with m platform DC-DC units
The sub- T of second connection end2, the 4th connection terminal T4It is connected, 1≤m<n；The sub- T of second connection end of n-th DC-DC unit2With HVDC
The negative pole of port 1 is connected, the 4th connection terminal T4It is connected with the negative pole of HVDC ports 2；So as to realize the defeated of n DC-DC unit
Enter end series connection, the type of attachment of output end series connection.
If the side voltage of HVDC ports 1 is vdc1, the first connection terminal of the input T of DC-DC units 11, the sub- T of second connection end2Between
Voltage vdc11, the first connection terminal of the input T of DC-DC units 21, the sub- T of second connection end2Between voltage vdc12, the like, DC-
DC unit n the first connection terminals of input T1, the sub- T of second connection end2Between voltage vdc1n, then vdc11、vdc12、…vdc1nSum is equal to
vdc1.It is corresponding, if the side voltage of HVDC ports 2 is vdc2, then vdc21、vdc22、…vdc2nSum is equal to vdc2。
It is input side interface circuit that DC-DC units provided by the invention include being sequentially connected, input side limiting circuit, defeated
Enter lateral capacitance C1, ITVDC converter unit, output lateral capacitance C2, outlet side limiting circuit and outlet side interface circuit.
Wherein, input side interface circuit and outlet side interface circuit are serially connected the switch turned in turn including two
Pipe, in input side (vdc11、vdc12、…vdc1n) and outlet side (vdc21、vdc22、…vdc2n) pulse that dutycycle is D is formed respectively
Voltage；And adjust input lateral capacitance C1With output lateral capacitance C2DC voltage so that input lateral capacitance C1With output lateral capacitance C2
DC voltage matched all the time with the transformer voltage ratio in ITVDC converter unit, so as to having highest efficiency.
Specifically, the embodiment as interface circuit of the present invention, input side interface circuit include being serially connected
First switch pipe Q11, second switch pipe Q12, first switch pipe Q11Emitter stage and second switch pipe Q12Colelctor electrode is connected with first
Terminal T1It is connected, first switch pipe Q11Colelctor electrode passes through the first buffering reactance L in input side limiting circuit1sWith inputting lateral capacitance
C1Positive pole is connected, second switch pipe Q12Emitter stage and input lateral capacitance C1Negative pole is connected, first switch pipe Q11, second switch pipe Q12
Reverse parallel connection has diode M respectively11、M12；Outlet side interface circuit includes the first switch pipe Q being serially connected21, second switch
Pipe Q22, first switch pipe Q21Emitter stage and second switch pipe Q22Colelctor electrode and the 3rd connection terminal T3It is connected, first switch pipe Q21
Colelctor electrode passes through the second buffering reactance L in outlet side limiting circuit2sWith exporting lateral capacitance C2Positive pole is connected, second switch pipe Q22
Emitter stage and output lateral capacitance C2Negative pole is connected, first switch pipe Q21, second switch pipe Q22Reverse parallel connection has diode respectively
M21、M22。
Input side limiting circuit and outlet side limiting circuit turned on and off for limiting above-mentioned interface circuit switching tube
The climbing of voltage and current in journey, as the specific embodiment of the present invention, input side limiting circuit includes the first buffering electric capacity
C1s, the first buffering electric capacity C1sPositive pole and diode D1sNegative pole connection, and pass through diode D1sIt is connected to the first buffering reactance
L1sInput side interface circuit connecting side；First buffering electric capacity C1sPositive pole also pass through the first buffer resistance R1sIt is connected to first
Buffer reactance L1sInput lateral capacitance C1Positive pole connecting side；First buffering electric capacity C1sNegative pole and input lateral capacitance C1Negative pole connects
Connect.Q11Or Q12In opening process, L1sCan be with the climbing of control electric current, Q11Or Q12During shut-off, C1s can control electricity
The climbing of pressure.
Outlet side limiting circuit includes the second buffering electric capacity C2s, the second buffering electric capacity C2sPositive pole and diode D2sIt is negative
Pole connects, and passes through diode D2sIt is connected to the second buffering reactance L2sOutlet side interface circuit connecting side；Second buffering electric capacity
C2sPositive pole also pass through the second buffer resistance R2sIt is connected to the second buffering reactance L2sOutput lateral capacitance C2Positive pole connecting side；The
Two buffering electric capacity C2sNegative pole and output lateral capacitance C2Negative pole connects.
As the first embodiment of ITVDC converter unit of the present invention, ITVDC converter unit input and output use full-bridge
Structure, as shown in figure 1, input full-bridge circuit H1, isolating transformer T including being sequentially connected and output full-bridge circuit H2, input
Full-bridge circuit H1 and output full-bridge circuit H2 are complete as the H of bridge arm using the construction of switch of switching device anti-parallel diodes
Bridge structure, specifically, input full-bridge circuit H1 the first bridge arm includes switching device S11Anti-parallel diodes D11The of composition
Bridge arm on one, and switching device S12Anti-parallel diodes D12First time bridge arm of composition；Input full-bridge circuit H1 the second bridge
Arm includes switching device S13Anti-parallel diodes D13Bridge arm on the second of composition, and switching device S14Anti-parallel diodes
D14Second time bridge arm of composition.Output full-bridge circuit H2 the first bridge arm includes switching device S21Anti-parallel diodes D21Group
Into first on bridge arm, and switching device S22Anti-parallel diodes D22First time bridge arm of composition；Export full-bridge circuit H2's
Second bridge arm includes switching device S23Anti-parallel diodes D23Bridge arm on the second of composition, and switching device S24Reverse parallel connection
Diode D24Second time bridge arm of composition.
As ITVDC converter unit another embodiment of the present invention, ITVDC converter unit input and output are using H half
Bridge structure, as shown in figure 3, input half-bridge circuit H1, isolating transformer T including being sequentially connected and output half-bridge circuit H2, defeated
Enter half-bridge circuit H1 and export half-bridge circuit H2 using the construction of switch of switching device anti-parallel diodes as bridge arm
Half-bridge structure, and half-bridge upper and lower bridge arm is parallel with DC capacitor respectively.Specifically, input half-bridge circuit H1 includes switching device S11
Anti-parallel diodes D11The upper bridge arm of composition, and switching device S12Anti-parallel diodes D12The lower bridge arm of composition, upper bridge arm
DC capacitor C is parallel with respectively with lower bridge arm13,C14；Upper and lower bridge arm connects midpoint and DC capacitor C13,C14Midpoint is connected to draw
It is connected to isolating transformer T primary side windings both ends.Output half-bridge circuit H2 includes switching device S21Anti-parallel diodes D21Group
Into upper bridge arm, and switching device S22Anti-parallel diodes D22The lower bridge arm of composition, upper bridge arm and lower bridge arm are parallel with respectively
DC capacitor C23,C24；Upper and lower bridge arm connects midpoint and DC capacitor C23,C24Connection midpoint, which is drawn, is connected to isolating transformer T pairs
Side winding both ends.
Input full-bridge circuit H1 input anodes and input lateral capacitance C1Positive pole is connected, input cathode and input lateral capacitance
C1Negative pole is connected.Export full-bridge circuit H2 output head anodes and output lateral capacitance C2Positive pole is connected, negative pole of output end and outlet side electricity
Hold C2Negative pole is connected.
Above-mentioned switching tube Q11、Q12、Q21、Q22Using IGCT or ETO with low on-state voltage drop；Switching tube S11~S14、S21
~S24IGBT, IGCT and MOSFET can be used.
A kind of high-voltage large-capacity commutator transformer operation principle provided by the invention：
In start-up course, switching device K11And K21Conducting, switching device K12And K22Shut-off, switching tube Q11、Q12、Q21、
Q22、S11~S14、S21~S24It is turned off, the electric current of HVDC ports 1 passes through switching device K11, delay startup resistance R1, direct current reactance L1、
Switching tube Q11, buffering reactance L1sGive input lateral capacitance C1Charging, HVDC ports 2 are by switching device K21, delay startup resistance R2, it is straight
Flow reactance L2, switching tube Q21, buffering reactance L2sGive output lateral capacitance C2Charging.After electric capacity C1 and electric capacity C2 charging completes, close
Combination switch K12 and K22.
In course of normal operation, switching tube Q11With switching tube Q12Rotation turns on, Q21And Q22Rotation turns on, mono- in DC-DC
Member is in input side (vdc11、vdc12、…vdc1n) and outlet side (vdc21、vdc22、…vdc2n) the pulse electricity that dutycycle is D is formed respectively
Pressure.Fig. 2 is the ideal waveform of the normal operating conditions of HVDC ports 1, and the working condition of HVDC ports 2 is similar.
Adjacent DC-DC units have 120 degree of phase shifting angle between the pulse voltage that same side ports export, with HVDC
(the v of port 1dc1) and (v of HVDC ports 2dc2) produce the pulse voltage of high switching frequency.
Due to the Q in input side interface circuit11、Q12With with the Q in outlet side interface circuit21、Q22It is operated in PWM shapes
State, so as to realize regulation to input lateral capacitance C1 and output lateral capacitance C2 DC voltage so that input lateral capacitance C1 and output
Lateral capacitance C2 DC voltage matches with ITVDC converter unit isolating transformer T no-load voltage ratios all the time, so as to have highest efficiency.
Adjacent DC-DC units have 120 degree of phase shifting angle between the pulse voltage that same side ports export, so that
Input series connection end output voltage (vdc1) switching frequency be each input interface unit output voltage (vdc11、vdc12、…vdc1n)
N times, so as to reduce the current ripples of HVDC ports 1.Corresponding output series connection end output voltage (vdc2) switching frequency
It is each output interface unit output voltage (vdc21、vdc22、…vdc2n) n times, so as to reduce the electric current of HVDC ports 2
Ripple
When a certain DC-DC units break down, switching tube Q11、Q21、S11~S14、S21~S24Disconnect, switching tube Q12With
Q22Closure, by failure DC-DC unit bypass.When short trouble occurs in HVDC ports 1 or HVDC ports 2, all DC-DC are mono-
First switching tube disconnects.So as to effectively improve the reliability of high-voltage large-capacity commutator transformer.
Switching device involved in the present invention, is mechanical switch or semiconductor switch, such as MOSFET, IGBT, IGCT, ETO,
IETO etc..
The preferred embodiments of the present invention are the foregoing is only, are not intended to limit the invention, in addition, the present invention can have respectively
Kind change and change.All any modification, equivalent substitution and improvements made within spirit and principles of the present invention etc., all should be wrapped
It is contained within protection scope of the present invention.
Claims (9)
- A kind of 1. high-voltage large-capacity commutator transformer, it is characterised in that：Including n identical input series/parallel, output end The modularization DC-DC units of series/parallel, wherein n are any positive integer；The DC-DC units include the input being sequentially connected Side interface circuit, input lateral capacitance, ITVDC converter unit, output lateral capacitance and outlet side interface circuit；The input side joint Mouth circuit and outlet side interface circuit pass through controlling switch pipe conducting state and adjust input lateral capacitance and export lateral capacitance respectively DC voltage matches with the transformer voltage ratio in ITVDC converter unit all the time.
- A kind of 2. high-voltage large-capacity commutator transformer according to claim 1, it is characterised in that：The input side interface electricity Input side limiting circuit is serially connected between road and input lateral capacitance, is serially connected between the outlet side interface circuit and output lateral capacitance defeated Go out side limiting circuit, the input side limiting circuit and outlet side limiting circuit are respectively used to limit the input side interface circuit The climbing of voltage and current during being turned on and off with outlet side interface circuit switching tube.
- A kind of 3. high-voltage large-capacity commutator transformer according to claim 2, it is characterised in that：The input side limitation electricity Road and input side limiting circuit include buffering electric capacity and buffering reactance, and the buffering electric capacity is connected to buffering electricity by diode Anti- respective side interface circuit connecting side；The positive pole of the buffering electric capacity is also connected to the correspondence of buffering reactance by buffer resistance Lateral capacitance positive pole connecting side；The negative pole of the buffering electric capacity connects with corresponding lateral capacitance negative pole.
- A kind of 4. high-voltage large-capacity commutator transformer according to claim 1, it is characterised in that：The input side interface electricity Road and outlet side interface circuit include the first switch pipe and second switch pipe being serially connected, input side interface circuit and output Side interface circuit by the first switch pipe and second switch pipe that turn in turn, is exported and accounted for respectively respectively in input side and outlet side Sky is than the pulse voltage for D.
- A kind of 5. high-voltage large-capacity commutator transformer according to claim 4, it is characterised in that：The first switch pipe collection Electrode is connected with respective side capacitance cathode, and second switch pipe emitter stage is connected with corresponding lateral capacitance negative pole, the first switch pipe, Reverse parallel connection has diode to second switch pipe respectively.
- A kind of 6. high-voltage large-capacity commutator transformer according to claim 1, it is characterised in that：The n identical is defeated In the modularization DC-DC units for entering end series connection output end series connection, the first connection terminal of the first DC-DC units is by being serially connected Direct current reactance, first switch device, second switch device be connected with the positive pole of input side high-voltage power supply；First DC-DC units 3rd connection terminal passes through the direct current reactance that is serially connected, first switch device, second switch device and outlet side high-voltage power supply Positive pole is connected；The second switch device is parallel with delay startup resistance, and the second switch device is delayed by switching open and close controlling Start resistance access circuit.
- A kind of 7. high-voltage large-capacity commutator transformer according to claim 6, it is characterised in that：The n identical is defeated In the modularization DC-DC units for entering end series connection output end series connection, the first connection terminal of m+1 platform DC-DC units, the 3rd connection Terminal is connected with second connection end, the 4th connection terminal of m platform DC-DC units respectively, 1≤m<n；N-th DC-DC unit Second connection end son with input high-voltage power supply negative pole be connected, the 4th connection terminal T4It is connected with the negative pole for exporting high-voltage power supply.
- A kind of 8. high-voltage large-capacity commutator transformer according to claim 1, it is characterised in that：The DC converter list Member includes input circuit, isolating transformer and the output circuit being sequentially connected, the input full-bridge circuit and output full-bridge circuit Using H full-bridge structure or half-bridge structure of the construction of switch of switching device anti-parallel diodes as bridge arm.
- A kind of 9. high-voltage large-capacity commutator transformer according to claim 1, it is characterised in that：The n identical is defeated Enter in the modularization DC-DC units that end series connection output end is connected, the pulse voltage that adjacent DC-DC units export in same side ports Between there is 120 degree of phase shifting angle.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201711188840.5A CN107834854A (en) | 2017-11-24 | 2017-11-24 | A kind of high-voltage large-capacity commutator transformer |
Applications Claiming Priority (1)
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| CN109256951A (en) * | 2018-09-29 | 2019-01-22 | 南京南瑞继保电气有限公司 | A kind of DC voltage conversion device and its control method |
| CN111682787A (en) * | 2020-05-18 | 2020-09-18 | 天津大学 | Single-stage three-phase AC/DC converter based on isolation converter module and method |
| US10819112B1 (en) | 2019-03-27 | 2020-10-27 | Abb Schweiz Ag | Feeder line fault response using direct current interconnection system |
| US10971934B2 (en) | 2018-12-31 | 2021-04-06 | Abb Schweiz Ag | Distribution networks with flexible direct current interconnection system |
| US11031773B2 (en) | 2019-03-27 | 2021-06-08 | Abb Power Grids Switzerland Ag | Transformer isolation response using direct current link |
| US11121543B2 (en) | 2018-12-31 | 2021-09-14 | Abb Schweiz Ag | Fault mitigation in medium voltage distribution networks |
| CN114094815A (en) * | 2021-11-17 | 2022-02-25 | 博雅工道（北京）机器人科技有限公司 | Power management system and control method |
| CN116054355A (en) * | 2023-03-29 | 2023-05-02 | 深圳市首航新能源股份有限公司 | Energy storage system and power grid system thereof |
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| US11031773B2 (en) | 2019-03-27 | 2021-06-08 | Abb Power Grids Switzerland Ag | Transformer isolation response using direct current link |
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