CN104601017B - Modularized multi-level converter being able to traverse direct current short circuit fault - Google Patents
Modularized multi-level converter being able to traverse direct current short circuit fault Download PDFInfo
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- CN104601017B CN104601017B CN201410827384.4A CN201410827384A CN104601017B CN 104601017 B CN104601017 B CN 104601017B CN 201410827384 A CN201410827384 A CN 201410827384A CN 104601017 B CN104601017 B CN 104601017B
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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
- H02M7/02—Conversion of ac power input into dc power output without possibility of reversal
- H02M7/04—Conversion of ac power input into dc power output without possibility of reversal by static converters
- H02M7/12—Conversion of ac power input into dc power output without possibility of reversal by static converters using discharge tubes with control electrode or semiconductor devices with control electrode
- H02M7/21—Conversion of ac power input into dc 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
- H02M7/217—Conversion of ac power input into dc 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
- H02M7/219—Conversion of ac power input into dc 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 in a bridge configuration
-
- 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
- H02M1/0003—Details of control, feedback or regulation circuits
Abstract
The invention relates to a mixed type modularized multi-level converter being able to traverse direct current short circuit fault based on novel clamping submodule, and belongs to the field of power electronic technology and electricity transmission and distribution. The provided novel clamping submodule is able to provide a negative voltage on the passage of the direct current short circuit fault current, thus being beneficial to quickly attenuating the fault current. The provided converter consists of three phases; each phase comprises upper and lower two bridge arms; each bridge arm consists of a plurality of half-bridge submodules, a plurality of clamping submodules and a filter inductor which are connected in series. In the provided modularized multi-level converter structure being able to traverse direct current short circuit fault, the half-bridge submodules and the clamping submodules are cascaded in a mixed type, thus the automatic zero clearing of the direct current short circuit fault current can be achieved with a lower cost; the modularized multi-level converter being able to traverse direct current short circuit fault has the advantages of low cost, fast in fault current clearing speed, free of capacitor voltage balancing problems inside the submodules, and the like.
Description
Technical field
The present invention relates to a kind of modular multi-level converter passing through direct-current short circuit fault, belong to Power Electronic Technique
With electrical power distribution electrical domain.
Background technology
Compared with traditional high voltage dc transmission technology, flexible high pressure HVDC Transmission Technology is realized using full switching device of controlling
Control to current transformer, thus have the advantages that control flexible, idle can freely compensate and be independent of AC system realize commutation,
Obtain extensive research in recent years and applied.It is based especially on the flexible high pressure direct current of modular multi-level converter structure
Transmission system, has at home and abroad had many places engineering to put into operation or build.
Direct-current short circuit fault is a kind of catastrophe failure type that must account for when flexible DC power transmission engineering design runs.
But for the current transformer using half-bridge sub-modular structure, when DC side is short-circuited fault, the inverse parallel in half-bridge submodule
Diode easily constitutes the energy feeding loop that trouble point directly connected with AC system so that current transformer cannot pass through its own switch
The removing of DC side fault current is realized in the action of device.For realizing removing to direct-current short circuit fault current, existing document and
Patent discloses multiple improvement projects, wherein by realizing the removing of direct-current short circuit fault current using new sub-modular structure
Scheme most economy and feasibility.For example, Application No. 201310470755.3, entitled " a kind of with short-circuit protection
Modular multi-level converter unsteady flow modular circuit " Chinese patent disclose a kind of sub-modular structure, this structure pass through in son
Inside modules increase gate-controlled switch device and clamp diode so that single submodule can provide itself positive rated voltage half
Back-pressure, remove such that it is able to realize fault current, but this structure is due to having multiple electric capacity inside submodule, and only half
The electric capacity of quantity is electrically charged after a failure, thus there is the unbalanced problem of submodule internal capacitance voltage.
Content of the invention
The purpose of the present invention is to propose to a kind of modular multi-level converter passing through direct-current short circuit fault, to existing
The structure of modular multi-level converter improves, by half-bridge sub-modular structure and a kind of bit submodule structure mixed class
Connection, can flexibly select the mixed proportion of two seed module, thus realizing direct current with relatively low cost according to cost and blocking time
The quick removing of short-circuit current.Because the electric capacity within this bit submodule all can be electrically charged after failure locking, thus
It is not in the unbalanced problem of submodule internal capacitance voltage.
The modular multi-level converter passing through direct-current short circuit fault proposed by the present invention, by a phase, b phase and c phase group
Become, be often in series by upper brachium pontis and lower brachium pontis, the positive terminal of upper brachium pontis is this phase DC side positive terminal, lower brachium pontis negative pole end
For this phase DC side negative pole end, upper brachium pontis negative pole end is this cross streams side with the junction point of lower brachium pontis positive terminal；Three-phase dc
Side anode connects together, and becomes the DC side positive pole of the modular multi-level converter that can pass through direct-current short circuit fault；Three-phase
Positive DC side end connects together, and forms the DC side negative pole of the modular multi-level converter that can pass through direct-current short circuit fault；
The exchange side of each phase of current transformer is connected with AC electrical network each phase line end respectively；
Described upper brachium pontis and lower brachium pontis by l half-bridge submodule, m bit submodule and filter reactor with
Any order is in series, and wherein l+2m+1 is equal to the level of the modular multi-level converter that can pass through direct-current short circuit fault
Number, m >=ulm/(4uc), ulmFor the modular multi-level converter AC line voltage amplitude of direct-current short circuit fault, u can be passed throughc
For the rated voltage of the modular multi-level converter half-bridge submodule of direct-current short circuit fault can be passed through；
Described clamp submodule, including the first direct current capacitors, the second direct current capacitors, the first gate-controlled switch device,
Second gate-controlled switch device, the 3rd gate-controlled switch device, the 4th gate-controlled switch device, the 5th gate-controlled switch device, the 6th controlled
Switching device, the first fly-wheel diode, the second fly-wheel diode, the 3rd fly-wheel diode, the 4th fly-wheel diode, the 5th afterflow
Diode, the 6th fly-wheel diode, the first catching diode and the second catching diode；The collection of described first gate-controlled switch device
Electrode, the colelctor electrode of the second gate-controlled switch device, the colelctor electrode of the 3rd gate-controlled switch device, the current collection of the 4th gate-controlled switch device
The colelctor electrode of pole, the colelctor electrode of the 5th gate-controlled switch device and the 6th gate-controlled switch device respectively with described the first afterflow two pole
The negative electrode of pipe, the negative electrode of the second fly-wheel diode, the negative electrode of the 3rd fly-wheel diode, the negative electrode of the 4th fly-wheel diode, the 5th
The negative electrode of the negative electrode of fly-wheel diode and the 6th fly-wheel diode is connected；The described emitter stage of the first gate-controlled switch device,
The emitter stage of two gate-controlled switch devices, the emitter stage of the 3rd gate-controlled switch device, the emitter stage of the 4th gate-controlled switch device, the 5th
The emitter stage of gate-controlled switch device, the emitter stage sun with the first described fly-wheel diode respectively of the 6th gate-controlled switch device
Pole, the anode of the second fly-wheel diode, the anode of the 3rd fly-wheel diode, the anode of the 4th fly-wheel diode, the 5th afterflow two
The anode of pole pipe, the anode of the 6th fly-wheel diode are connected；The colelctor electrode of the first described gate-controlled switch device is simultaneously with first
The positive terminal of the negative electrode of clamp diode and the first direct current capacitors is connected, and the emitter stage and second of the first gate-controlled switch device can
The colelctor electrode of control switching device is connected, as the positive terminal of clamp submodule；The emitter stage of the second described gate-controlled switch device
It is connected with the emitter stage of the 3rd gate-controlled switch device and the negative pole of the first direct current capacitors simultaneously, described the 3rd gate-controlled switch device
The colelctor electrode of part simultaneously with the anode of the first clamp diode, the emitter stage of the 4th gate-controlled switch device and the second catching diode
Negative electrode be connected；The colelctor electrode colelctor electrode and second with the 4th gate-controlled switch device simultaneously of the 6th described gate-controlled switch device
The positive pole of direct current capacitors is connected；The emitter stage anode with second diode simultaneously of the 5th described gate-controlled switch device
It is connected with the negative pole of the second DC capacitor；The sending out of the described colelctor electrode of the 5th gate-controlled switch device and the 6th gate-controlled switch device
Emitter-base bandgap grading is connected, as the negative pole end of clamp submodule.
The modular multi-level converter passing through direct-current short circuit fault proposed by the present invention, its advantage is:
By half-bridge sub-modular structure and new bit submodule structure Mixed cascading, direct current can be realized with relatively low cost
The automatic clear of short-circuit current.Due to using Mixed cascading structure, the ratio of half-bridge submodule number l and bit submodule number m
Value can be according to demand flexible design such as reduces cost, minimizing fault current checkout times.For current transformer proposed by the present invention,
Work as l/m=0, that is, completely adopt new bit submodule when, its fault current checkout time is the shortest, with completely adopt full-bridge submodule
The modular multi-level converter of block is compared, and fault current understands that the time is substantially suitable, but current transformer three-phase proposed by the present invention
Save 12m igbt altogether；With the increase of l/m ratio, needed for current transformer proposed by the present invention, igbt and number of diodes enter one
Step reduces, and as l/m=2, compared with the modular multi-level converter completely using clamp Shuangzi module, its fault current is clear
Except the time is substantially suitable, but current transformer three-phase proposed by the present invention saves 6l clamp diode altogether, and installation cost is lower.Suitable
When the ratio increasing l/m, it is possible to reduce fault current resets the time, contribute to modular multi-level converter short in impermanency
Fast quick-recovery normal operating conditions during the fault of road.With Application No. 201310470755.3, entitled " a kind of with short-circuit protection
Modular multi-level converter unsteady flow modular circuit " Chinese patent propose sub-modular structure compare, change proposed by the present invention
There is not inside modules capacitor voltage equalizing problem, thus without because of multiple fault postfactor inside modules capacitance voltage not in stream device structure
All cause capacitance damage.
Brief description
Fig. 1 is the circuit theory diagrams of the modular multi-level converter passing through direct-current short circuit fault proposed by the present invention.
Fig. 2 is the structural representation of upper brachium pontis and lower brachium pontis in the modular multi-level converter shown in Fig. 1.
Fig. 3 is the structural representation of the clamp submodule in the upper brachium pontis shown in Fig. 2 and lower brachium pontis.
Fig. 4 is the change of modular multi-level converter proposed by the present invention fault current before and after dc-side short-circuit fault
Curve.
Specific embodiment
The modular multi-level converter passing through direct-current short circuit fault proposed by the present invention, its circuit theory diagrams such as Fig. 1
Shown, by a phase, b phase and c phase composition, often it is in series by upper brachium pontis and lower brachium pontis, the positive terminal of upper brachium pontis is this phase direct current
Side positive terminal, lower brachium pontis negative pole end is this phase DC side negative pole end, and upper brachium pontis negative pole end with the junction point of lower brachium pontis positive terminal is
This cross streams side；Three-phase dc side anode connects together, and becomes the modular multilevel change that can pass through direct-current short circuit fault
The DC side positive pole dc+ of stream device；Three-phase dc side negative terminal connects together, and the modularity that formation can pass through direct-current short circuit fault is many
The DC side negative pole dc- of level current transformer；Exchange side ac, bc, cc of each phase of current transformer each phase line with AC electrical network respectively
Ag, bg, cg connect at end；
Upper brachium pontis in above-mentioned modular multi-level converter and lower brachium pontis, its circuit theory diagrams is as shown in Fig. 2 by l
Individual half-bridge submodule, m bit submodule and a filter reactor are in series with any order, and wherein l+2m+1 is equal to can
Pass through the level number of the modular multi-level converter of direct-current short circuit fault, m >=ulm/(4uc), ulmFor direct-current short circuit event can be passed through
The modular multi-level converter AC line voltage amplitude of barrier, ucModular multilevel for passing through direct-current short circuit fault becomes
The rated voltage of stream device half-bridge submodule.
Clamp submodule in above-mentioned upper brachium pontis and lower brachium pontis, its circuit theory diagrams is as shown in figure 3, include the first unidirectional current
Container c1, the second direct current capacitors c2, the first gate-controlled switch device t1, the second gate-controlled switch device t2, the 3rd gate-controlled switch device
t3, the 4th gate-controlled switch device t4, the 5th gate-controlled switch device t5, the 6th gate-controlled switch device t6, the first fly-wheel diode d1,
Two fly-wheel diode d2, the 3rd fly-wheel diode d3, the 4th fly-wheel diode d4, the 5th fly-wheel diode d5, the 6th afterflow two pole
Pipe d6, the first catching diode dc1With the second catching diode dc2；Described first gate-controlled switch device t1Colelctor electrode, second can
Control switching device t2Colelctor electrode, the 3rd gate-controlled switch device t3Colelctor electrode, the 4th gate-controlled switch device t4Colelctor electrode,
Five gate-controlled switch device t5Colelctor electrode and the 6th gate-controlled switch device t6Colelctor electrode respectively with the first described fly-wheel diode
d1Negative electrode, the second fly-wheel diode d2Negative electrode, the 3rd fly-wheel diode d3Negative electrode, the 4th fly-wheel diode d4Negative electrode,
5th fly-wheel diode d5Negative electrode and the 6th fly-wheel diode d6Negative electrode be connected；The first described gate-controlled switch device t1's
Emitter stage, the second gate-controlled switch device t2Emitter stage, the 3rd gate-controlled switch device t3Emitter stage, the 4th gate-controlled switch device
t4Emitter stage, the 5th gate-controlled switch device t5Emitter stage, the 6th gate-controlled switch device t6Emitter stage respectively with described
One fly-wheel diode d1Anode, the second fly-wheel diode d2Anode, the 3rd fly-wheel diode d3Anode, the 4th afterflow two
Pole pipe d4Anode, the 5th fly-wheel diode d5Anode, the 6th fly-wheel diode d6Anode be connected；Described first is controlled
Switching device t1Colelctor electrode simultaneously with the first clamp diode dc1Negative electrode and the first direct current capacitors c1Positive terminal be connected,
First gate-controlled switch device t1Emitter stage and the second gate-controlled switch device t2Colelctor electrode be connected, as clamp submodule just
Extremely+；The second described gate-controlled switch device t2Emitter stage simultaneously with the 3rd gate-controlled switch device t3Emitter stage and first straight
Stream capacitor c1Negative pole be connected, described the 3rd gate-controlled switch device t3Colelctor electrode simultaneously with the first clamp diode dc1's
Anode, the 4th gate-controlled switch device t4Emitter stage and the second catching diode dc2Negative electrode be connected；Described 6th controlled opens
Close device t6Colelctor electrode simultaneously with the 4th gate-controlled switch device t4Colelctor electrode and the second direct current capacitors c2Positive pole be connected；
The 5th described gate-controlled switch device t5Emitter stage simultaneously with second diode dc2Anode and the second DC capacitor c2
Negative pole be connected；The 5th described gate-controlled switch device t5Colelctor electrode and the 6th gate-controlled switch device t6Emitter stage be connected, make
Negative pole end for clamp submodule-.
, in normal operation, the 3rd in all clamp submodules is controlled for modular multi-level converter proposed by the present invention
Device t3With the 4th gate-controlled switch device t4Control signal be high level, make t3And t4Constantly on；When current transformer is detected
During dc-side short-circuit fault, the control signal of all gate-controlled switch devices is low level, so that all gate-controlled switch devices is all located
In blocking, hereafter short circuit current can decline rapidly, thus each electric device of effective protection is without damage.
Illustrate that the present invention's is concrete below taking the three-phase modular multilevel commutator being applied to three-phase alternating current electrical network as a example
Embodiment.
In this embodiment, the parameter of 9 level three-phase modular multilevel current transformers see table.
In the present embodiment, current transformer normal work before t=0.5s, the 3rd controllable devices in all clamp submodules
t3With the 4th controllable devices t4Control signal be high level, make t3And t4Constantly on；The current transformer direct current in t=0.5s
Side is short-circuited fault, DC side electric current is detected in t=0.5026s and reaches action threshold value 0.75ka, converter control system
It is low level to the control signal of gate-controlled switch device in all submodules so that all gate-controlled switch devices are in locking
State.Fig. 4 gives the situation of change of DC side electric current before and after dc-side short-circuit fault it is seen that closing in t=0.5026s current transformer
After locking each gate-controlled switch device, short circuit current declines rapidly, drop in t=0.5062s 0 it is achieved that fault current from
Dynamic removing.
Claims (1)
1. a kind of modular multi-level converter passing through direct-current short circuit fault is it is characterised in that this modular multilevel unsteady flow
Device, by a phase, b phase and c phase composition, is often in series by upper brachium pontis and lower brachium pontis, and the positive terminal of upper brachium pontis is this phase DC side
Positive terminal, lower brachium pontis negative pole end is this phase DC side negative pole end, and upper brachium pontis negative pole end is should with the junction point of lower brachium pontis positive terminal
Cross streams side；Three-phase dc side anode connects together, and becomes the modular multilevel unsteady flow that can pass through direct-current short circuit fault
The DC side positive pole of device；Three-phase dc side negative terminal connects together, and forms the modular multilevel that can pass through direct-current short circuit fault
The DC side negative pole of current transformer；The exchange side of each phase of current transformer is connected with AC electrical network each phase line end respectively；
Described upper brachium pontis and lower brachium pontis are by l half-bridge submodule, m clamp submodule and a filter reactor with any
Order is in series, wherein l+2m+1 be equal to can pass through direct-current short circuit fault modular multi-level converter level number, m >=
ulm/(4uc), ulmFor the modular multi-level converter AC line voltage amplitude of direct-current short circuit fault, u can be passed throughcFor wearing
Get over the rated voltage of the modular multi-level converter half-bridge submodule of direct-current short circuit fault；
Described clamp submodule, including the first direct current capacitors, the second direct current capacitors, the first gate-controlled switch device, second
Gate-controlled switch device, the 3rd gate-controlled switch device, the 4th gate-controlled switch device, the 5th gate-controlled switch device, the 6th gate-controlled switch
Device, the first fly-wheel diode, the second fly-wheel diode, the 3rd fly-wheel diode, the 4th fly-wheel diode, the 5th afterflow two pole
Pipe, the 6th fly-wheel diode, the first clamp diode and the second clamp diode；The current collection of described first gate-controlled switch device
Pole, the colelctor electrode of the second gate-controlled switch device, the colelctor electrode of the 3rd gate-controlled switch device, the current collection of the 4th gate-controlled switch device
The colelctor electrode of pole, the colelctor electrode of the 5th gate-controlled switch device and the 6th gate-controlled switch device respectively with described the first afterflow two pole
The negative electrode of pipe, the negative electrode of the second fly-wheel diode, the negative electrode of the 3rd fly-wheel diode, the negative electrode of the 4th fly-wheel diode, the 5th
The negative electrode of the negative electrode of fly-wheel diode and the 6th fly-wheel diode is connected；The described emitter stage of the first gate-controlled switch device,
The emitter stage of two gate-controlled switch devices, the emitter stage of the 3rd gate-controlled switch device, the emitter stage of the 4th gate-controlled switch device, the 5th
The emitter stage of gate-controlled switch device, the emitter stage sun with the first described fly-wheel diode respectively of the 6th gate-controlled switch device
Pole, the anode of the second fly-wheel diode, the anode of the 3rd fly-wheel diode, the anode of the 4th fly-wheel diode, the 5th afterflow two
The anode of pole pipe, the anode of the 6th fly-wheel diode are connected；The colelctor electrode of the first described gate-controlled switch device is simultaneously with first
The positive terminal of the negative electrode of clamp diode and the first direct current capacitors is connected, and the emitter stage and second of the first gate-controlled switch device can
The colelctor electrode of control switching device is connected, as the positive terminal of clamp submodule；The emitter stage of the second described gate-controlled switch device
It is connected with the emitter stage of the 3rd gate-controlled switch device and the negative pole of the first direct current capacitors simultaneously, described the 3rd gate-controlled switch device
The colelctor electrode of part simultaneously with the anode of the first clamp diode, the emitter stage of the 4th gate-controlled switch device and the second clamp diode
Negative electrode be connected；The colelctor electrode colelctor electrode and second with the 4th gate-controlled switch device simultaneously of the 6th described gate-controlled switch device
The positive pole of direct current capacitors is connected；The emitter stage anode with the second clamp diode simultaneously of the 5th described gate-controlled switch device
It is connected with the negative pole of the second DC capacitor；The sending out of the described colelctor electrode of the 5th gate-controlled switch device and the 6th gate-controlled switch device
Emitter-base bandgap grading is connected, as the negative pole end of clamp submodule.
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| CN201410827384.4A CN104601017B (en) | 2014-12-25 | 2014-12-25 | Modularized multi-level converter being able to traverse direct current short circuit fault |
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| CN201410827384.4A CN104601017B (en) | 2014-12-25 | 2014-12-25 | Modularized multi-level converter being able to traverse direct current short circuit fault |
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| CN104601017B true CN104601017B (en) | 2017-01-25 |
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Families Citing this family (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104821736A (en) * | 2015-05-15 | 2015-08-05 | 国家电网公司 | Modularized multi-level converter with function of DC side short circuit protection |
| CN106160545B (en) * | 2016-07-06 | 2018-12-11 | 清华大学 | A kind of bridge arm hybrid bipolar modular multi-level converter |
| CN106452104B (en) * | 2016-09-13 | 2019-03-29 | 清华大学 | Monopolar current is cross-linked three level submodules |
| CN107612397B (en) * | 2017-10-31 | 2023-08-04 | 国网福建省电力有限公司 | Capacitance clamping sub-module, modularized multi-level converter applying same and working method |
| CN110244168B (en) * | 2019-07-16 | 2021-05-25 | 青岛海信商用显示股份有限公司 | Electric control lock fault detection system and detection method |
| CN110890742B (en) * | 2019-11-25 | 2020-11-20 | 上海交通大学 | Direct-current side fault ride-through method of low-loss modular multilevel direct-current transformer |
| CN112713763B (en) * | 2020-12-21 | 2022-05-31 | 科大国创新能科技有限公司 | Self-starting method and device of circuit module and power assembly system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013044961A1 (en) * | 2011-09-29 | 2013-04-04 | Siemens Aktiengesellschaft | Short-circuit current discharge for a sub-module of a modular multi-stage converter (mmc) |
| CN103516243A (en) * | 2013-10-10 | 2014-01-15 | 清华大学 | Modularization multi-level current transformer current transforming module circuit with short-circuit protection function |
| CN103731059A (en) * | 2013-06-13 | 2014-04-16 | 华北电力大学 | Novel double-clamping sub-module structure circuit of modular multilevel converter |
| CN103956925A (en) * | 2014-04-28 | 2014-07-30 | 浙江大学 | Hybrid MMC capacitor voltage balance control method |
| CN104022666A (en) * | 2014-05-30 | 2014-09-03 | 荣信电力电子股份有限公司 | Modularization multi-level converter valve for flexible DC power transmission system |
| CN104158419A (en) * | 2014-08-04 | 2014-11-19 | 浙江大学 | Method for balancing capacitor voltage of modularization multilevel converter |
-
2014
- 2014-12-25 CN CN201410827384.4A patent/CN104601017B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2013044961A1 (en) * | 2011-09-29 | 2013-04-04 | Siemens Aktiengesellschaft | Short-circuit current discharge for a sub-module of a modular multi-stage converter (mmc) |
| CN103731059A (en) * | 2013-06-13 | 2014-04-16 | 华北电力大学 | Novel double-clamping sub-module structure circuit of modular multilevel converter |
| CN103516243A (en) * | 2013-10-10 | 2014-01-15 | 清华大学 | Modularization multi-level current transformer current transforming module circuit with short-circuit protection function |
| CN103956925A (en) * | 2014-04-28 | 2014-07-30 | 浙江大学 | Hybrid MMC capacitor voltage balance control method |
| CN104022666A (en) * | 2014-05-30 | 2014-09-03 | 荣信电力电子股份有限公司 | Modularization multi-level converter valve for flexible DC power transmission system |
| CN104158419A (en) * | 2014-08-04 | 2014-11-19 | 浙江大学 | Method for balancing capacitor voltage of modularization multilevel converter |
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