CN105870956A - Type selection method for direct-current breaker used in multiterminal flexible direct-current transmission system - Google Patents
Type selection method for direct-current breaker used in multiterminal flexible direct-current transmission system Download PDFInfo
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- CN105870956A CN105870956A CN201610286244.XA CN201610286244A CN105870956A CN 105870956 A CN105870956 A CN 105870956A CN 201610286244 A CN201610286244 A CN 201610286244A CN 105870956 A CN105870956 A CN 105870956A
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- current
- conversion station
- current conversion
- conveying power
- circuit breaker
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/36—Arrangements for transfer of electric power between ac networks via a high-tension dc link
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J1/00—Circuit arrangements for dc mains or dc distribution networks
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02E60/60—Arrangements for transfer of electric power between AC networks or generators via a high voltage DC link [HVCD]
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- Direct Current Feeding And Distribution (AREA)
- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
Abstract
The invention discloses a type selection method for a direct-current breaker used in a multiterminal flexible direct-current transmission system. The type selection method includes the steps that all convertor stations are made to have a double-pole short-circuit fault; the control mode and transmission power of the convertor stations are adjusted, the convertor stations except the convertor station connected with a direct-current breaker set with the type to be selected are set according to the optimal control mode and the optimal transmission power obtained when the largest short-circuit current is generated in the convertor stations, and the first largest current of the side, close to the corresponding convertor station, of the setting position of the direct-current breaker set with the type to be selected and the occurrence time of the first largest current are obtained; the convertor station connected with the direct-current breaker set with the type to be selected is set according to the optimal control mode and the optimal transmission power, and the second largest current of the side, away from the corresponding convertor station, of the setting position of the direct-current breaker set with the type to be selected and the occurrence time of the second largest current are obtained; the type of the direct-current breaker set with the type to be selected is selected according to the larger one of the first largest current and the second largest current and the occurrence time of the larger one. The direct-current breaker selected through the method can be used for various faults and is wide in application range.
Description
Technical field
The present invention relates to technical field of direct current power transmission, particularly relate to a kind of for Multi-end flexible direct current transmission system
The dc circuit breaker selection method of system.
Background technology
At present, quickly growing of Multi-end flexible direct current transmission system, in many Multi-end flexible direct current transmission system
Have employed MMC type converter valve, this kind of converter valve in case of a failure, although converter valve can be caused
Locking, but before and after locking, there is discharge loop all the time, there are direct-current short circuit electric current, this feelings the most all the time
Current conversion station in Multi-end flexible direct current transmission system can be worked the mischief by condition.
Therefore in order to cut off direct-current short circuit electric current when converter valve breaks down, need in the position near current conversion station
Dc circuit breaker is installed, but, due to the direct-current short circuit electric current produced when converter valve occurs different faults
Vary in size, and the direct-current short circuit electric current that the dc circuit breaker with different index parameter can cut off is big
Little also different, therefore major part dc circuit breaker can not be applicable to each of Multi-end flexible direct current transmission system generation
Plant failure condition.
Therefore, how to provide a kind of and can select the flexible for multiterminal of dc circuit breaker applied widely
The dc circuit breaker selection method of DC transmission system is the problem that those skilled in the art are presently required solution.
Summary of the invention
It is an object of the invention to provide a kind of dc circuit breaker type selecting for Multi-end flexible direct current transmission system
Method, the direct-current short circuit electric current that the dc circuit breaker selected produces when can cut off various fault, it is suitable for model
Enclose wide.
For solving above-mentioned technical problem, the invention provides a kind of straight for Multi-end flexible direct current transmission system
Stream chopper selection method, described Multi-end flexible direct current transmission system includes multiple current conversion station, each described in change
Stream station is connected with one or more dc circuit breaker groups；Described dc circuit breaker selection method includes:
Each described current conversion station is made to be in bipolar short trouble；
Adjust control model and the conveying power of described current conversion station, obtain described current conversion station and produce maximum short circuit
Preferred control model corresponding during electric current and preferably carry power；
Remove break with the direct current treating type selecting according to described preferred control model and described preferably conveying power setting
The current conversion station beyond current conversion station that road device group is connected, treat described in acquisition type selecting dc circuit breaker group position is set
Put the first maximum current near current conversion station side and the time of occurrence of described first maximum current；
According to described preferred control model and described preferably conveying power setting and the described direct current treating type selecting
The described current conversion station that chopper group is connected, treat described in acquisition type selecting dc circuit breaker group arrange on position remote
The second maximum current from current conversion station side and the time of occurrence of described second maximum current；
Relatively described first maximum current and the size of described second maximum current, according to the biggest electric current
And time of occurrence corresponding to described bigger electric current select described in treat in the dc circuit breaker group of type selecting institute
State the type of dc circuit breaker.
Preferably, described current conversion station uses MMC type converter valve.
Preferably, the described control model by the described current conversion station of adjustment and conveying power, obtain when described
Corresponding preferred control model and preferably carry the process tool of power when current conversion station produces maximum short circuit current
Body is:
Use and determine active power controller pattern, adjust the conveying power of described current conversion station, obtain when the described change of current
Stand corresponding first conveying power when producing the first maximum short circuit current；
Use constant DC voltage control pattern, adjust the conveying power of described current conversion station, obtain when the described change of current
Stand corresponding second conveying power when producing the second maximum short circuit current；
Relatively described first maximum short circuit current and the size of described second maximum short circuit current, select the most relatively
Control model that big short circuit current is corresponding and conveying power are as real power control pattern and meritorious conveying
Power；
Use and determine Reactive Power Control pattern, adjust the conveying power of described current conversion station, obtain when the described change of current
Stand corresponding 3rd conveying power when producing three maximum short circuit currents；
Use and determine alternating voltage control model, adjust the conveying power of described current conversion station, obtain when the described change of current
Stand corresponding 4th conveying power when producing four maximum short circuit currents；
Relatively described 3rd maximum short circuit current and the size of described 4th maximum short circuit current, select the most relatively
Control model that big short circuit current is corresponding and conveying power are as idle control model and idle conveying
Power；
Described real power control pattern and described meritorious conveying power and described idle control model and described nothing
Merit conveying power is described preferred control model and described preferably carries power.
Preferably, described according to described preferred control model and described preferably conveying power setting is except with to be selected
After the current conversion station beyond current conversion station that the dc circuit breaker group of type is connected, also include:
Arrange according to described constant DC voltage control pattern described in being connected with the dc circuit breaker group treating type selecting
Current conversion station.
Preferably, described dc circuit breaker group includes two described dc circuit breakers.
Preferably, described Multi-end flexible direct current transmission system includes 5 described current conversion stations.
The invention provides a kind of dc circuit breaker selection method for Multi-end flexible direct current transmission system, should
Method, when current conversion station is in bipolar short trouble, obtains optimization control during current conversion station generation maximum short circuit current
Molding formula and optimization conveying power, so that it is determined that go out suitable dc circuit breaker.Due to bipolar short trouble
Time, the direct-current short circuit electric current that the direct-current short circuit electric current that current conversion station produces produces when being greater than other faults, therefore
In this case, if the dc circuit breaker selected can cut off the direct-current short circuit electric current of generation, then at current conversion station
It also is able to when producing other faults direct-current short circuit electric current is cut off, therefore the selection method of the present invention is selected
Dc circuit breaker applied widely.
Accompanying drawing explanation
For the technical scheme being illustrated more clearly that in the embodiment of the present invention, below will be to prior art and enforcement
In example, the required accompanying drawing used is briefly described, it should be apparent that, the accompanying drawing in describing below is only
Some embodiments of the present invention, for those of ordinary skill in the art, are not paying creative work
Under premise, it is also possible to obtain other accompanying drawing according to these accompanying drawings.
A kind of dc circuit breaker type selecting for Multi-end flexible direct current transmission system that Fig. 1 provides for the present invention
The flow chart of the process of method；
A kind of dc circuit breaker type selecting for Multi-end flexible direct current transmission system that Fig. 2 provides for the present invention
Method obtains preferred control model and preferably carries the flow chart of process of power；
A kind of dc circuit breaker type selecting for Multi-end flexible direct current transmission system that Fig. 3 provides for the present invention
In method, dc circuit breaker group arranges position view.
Detailed description of the invention
The core of the present invention is to provide a kind of dc circuit breaker type selecting for Multi-end flexible direct current transmission system
Method, the direct-current short circuit electric current that the dc circuit breaker selected produces when can cut off various fault, it is suitable for model
Enclose wide.
For making the purpose of the embodiment of the present invention, technical scheme and advantage clearer, below in conjunction with the present invention
Accompanying drawing in embodiment, is clearly and completely described the technical scheme in the embodiment of the present invention, it is clear that
Described embodiment is a part of embodiment of the present invention rather than whole embodiments.Based in the present invention
Embodiment, those of ordinary skill in the art obtained under not making creative work premise all its
His embodiment, broadly falls into the scope of protection of the invention.
The invention provides a kind of dc circuit breaker selection method for Multi-end flexible direct current transmission system, many
End flexible direct current power transmission system includes multiple current conversion station, each current conversion station and one or more dc circuit breaker groups
It is connected；This dc circuit breaker selection method includes:
Step s101: make each current conversion station be in bipolar short trouble；
It is understood that when current conversion station is in bipolar short trouble, the direct-current short circuit electric current of generation wants big
The direct-current short circuit electric current produced when other faults, if therefore the dc circuit breaker selected can be in bipolar short circuit event
If cutting off direct-current short circuit electric current during barrier, then this dc circuit breaker also is able to when there are other any faults cut
Disconnected direct-current short circuit electric current, thus ensure that the applied widely of the dc circuit breaker of selection.
Step s102: adjust control model and the conveying power of current conversion station, obtain current conversion station and produce maximum
Preferred control model corresponding during short circuit current and preferably carry power；
It is understood that in preferred control model and preferably carry under power, current conversion station can produce
Big direct-current short circuit electric current, therefore, if the dc circuit breaker selected can cut off produce in the case of this kind straight
If flow short-circuit electric current, then this dc circuit breaker also be able to current conversion station be in other control models and other
Direct-current short circuit electric current is cut off, it is ensured that dc circuit breaker can be applied to current conversion station in the case of conveying power
Under various control models and various conveying power.
Step s103: remove and the direct current treating type selecting according to preferred control model and preferably conveying power setting
Chopper group be connected current conversion station beyond current conversion station, obtain treat type selecting dc circuit breaker group position is set
Upper the first maximum current near current conversion station side and the time of occurrence of the first maximum current；
Step s104: break according to preferred control model and preferably conveying power setting and the direct current treating type selecting
The current conversion station that road device group is connected, the setting obtaining the dc circuit breaker group treating type selecting is remotely located from current conversion station one
Second maximum current of side and the time of occurrence of the second maximum current；
It should be noted that step s103 and step s104 are that the index parameter to dc circuit breaker is carried out really
Fixed, so that it is determined that the type of dc circuit breaker, so time dc circuit breaker do not access Multi-end flexible direct current transmission
In system, the first maximum current and the second maximum current refer to install the dc circuit breaker treating type selecting
That organizes arranges the maximum current occurred respectively on the both sides of position.
Step s105: compare the first maximum current and the size of the second maximum current, according to the biggest
Electric current and time of occurrence corresponding to bigger electric current select the direct current treating in the dc circuit breaker group of type selecting to break
The type of road device.
It addition, the bigger electric current obtained here may flow through, when being bipolar short trouble, the direct current treating type selecting
The maximum current of chopper group, and the size of this maximum current and time of occurrence are and determine dc circuit breaker
The index parameter of type.
It is understood that owing to including multiple dc circuit breaker group in Multi-end flexible direct current transmission system, often
Individual dc circuit breaker group is required to carry out type selecting, therefore when each dc circuit breaker group is carried out type selecting, is both needed to
Step s103-s105 to be carried out.
As preferably, current conversion station here uses MMC type converter valve.
It is further known that, in the Multi-end flexible direct current transmission system of MMC type converter valve composition, each
The control system of current conversion station is collectively constituted by meritorious class control model and idle class control model, meritorious class control
Molding formula generally comprises constant DC voltage control pattern and determines (the change of current in running of active power controller pattern
The necessary alternative of the control model stood), idle class control model includes determining alternating voltage control model and determining nothing
Merit power control mode (the necessary alternative of the control model of current conversion station in running), each control simultaneously
Under molding formula, current conversion station can transmit again the conveying power varied in size, and it is understood that in different controls
Under molding formula and different conveying power, varying in size of the direct-current short circuit electric current that current conversion station produces.
A kind of straight for Multi-end flexible direct current transmission system shown in Figure 2, that Fig. 2 provides for the present invention
Stream chopper selection method obtains preferred control model and preferably carries the flow chart of process of power；I.e.
By adjusting control model and the conveying power of current conversion station, obtain when current conversion station produces maximum short circuit current
Corresponding preferred control model and preferably carry power process particularly as follows:
Step 201: use and determine active power controller pattern, adjusts the conveying power of current conversion station, obtains when changing
Stream station produces the first conveying power corresponding during the first maximum short circuit current；
Step 202: use constant DC voltage control pattern, adjusts the conveying power of current conversion station, obtains when changing
Stream station produces the second conveying power corresponding during the second maximum short circuit current；
Step 203: compare the first maximum short circuit current and the size of the second maximum short circuit current, selects wherein
Control model and conveying power that bigger short circuit current is corresponding as real power control pattern and are gained merit defeated
Send power；
Step 204: use and determine Reactive Power Control pattern, adjusts the conveying power of current conversion station, obtains when changing
Stream station produces the 3rd conveying power corresponding during three maximum short circuit currents；
Step 205: use and determine alternating voltage control model, adjusts the conveying power of current conversion station, obtains when changing
Stream station produces the 4th conveying power corresponding during four maximum short circuit currents；
Step 206: compare the 3rd maximum short circuit current and the size of the 4th maximum short circuit current, selects wherein
Control model that bigger short circuit current is corresponding and conveying power are as idle control model and idle defeated
Send power；
Wherein, real power control pattern with meritorious conveying power and idle control model with idle conveying power is
For preferred control model and preferably carry power.
As preferably, remove and the direct current treating type selecting according to preferred control model and preferably conveying power setting
After the current conversion station beyond current conversion station that chopper group is connected, also include:
The current conversion station being connected with the dc circuit breaker group treating type selecting is set according to constant DC voltage control pattern.
It is understood that the electric current exported due to other current conversion stations is direct current, therefore for ensureing DC network
Running, the current conversion station being connected with the dc circuit breaker group treating type selecting should be set to constant DC voltage control pattern.
As preferably, dc circuit breaker group includes two dc circuit breakers.
Now, the two dc circuit breaker be arranged at current conversion station bipolar on, and be respectively arranged at positive pole with negative
Extremely go up.
It addition, Multi-end flexible direct current transmission system includes 5 current conversion stations.Certainly, the present invention is to current conversion station
Number is not specially limited, and does not the most limit the number of the dc circuit breaker group being connected with each current conversion station simultaneously.
As preferably, dc circuit breaker may be disposed at two of the wire between the current conversion station that any two is connected
Holding and be arranged on the bus of Multi-end flexible direct current transmission system, shown in Figure 3, Fig. 3 is the present invention
A kind of dc circuit breaker in the dc circuit breaker selection method of Multi-end flexible direct current transmission system provided
That organizes arranges position view.Wherein, A～E station is 5 current conversion stations, and 1～10 is dc circuit breaker group
Position is set.Certainly, Fig. 3 is only preferred version, dc circuit breaker group arrange position and current conversion station
Number and connected mode are relevant, and this is not particularly limited by the present invention.
The invention provides a kind of dc circuit breaker selection method for Multi-end flexible direct current transmission system, should
Method, when current conversion station is in bipolar short trouble, obtains optimization control during current conversion station generation maximum short circuit current
Molding formula and optimization conveying power, so that it is determined that go out suitable dc circuit breaker.Due to bipolar short trouble
Time, the direct-current short circuit electric current that the direct-current short circuit electric current that current conversion station produces produces when being greater than other faults, therefore
In this case, if the dc circuit breaker selected can cut off the direct-current short circuit electric current of generation, then at current conversion station
It also is able to when producing other faults direct-current short circuit electric current is cut off, therefore the selection method of the present invention is selected
Dc circuit breaker applied widely.
It should be noted that in this manual, the relational terms of such as first and second or the like is only used
One entity or operation are separated with another entity or operating space, and not necessarily requires or imply
Relation or the order of any this reality is there is between these entities or operation.And, term " includes ",
" comprise " or its any other variant is intended to comprising of nonexcludability, so that include a series of wanting
Process, method, article or the equipment of element not only include those key elements, but also include being not expressly set out
Other key elements, or also include the key element intrinsic for this process, method, article or equipment.
In the case of there is no more restriction, statement " including ... " key element limited, it is not excluded that at bag
Include and the process of described key element, method, article or equipment there is also other identical element.
Described above to the disclosed embodiments, makes professional and technical personnel in the field be capable of or uses this
Invention.Multiple amendment to these embodiments will be apparent for those skilled in the art
, generic principles defined herein can without departing from the spirit or scope of the present invention,
Other embodiments realize.Therefore, the present invention is not intended to be limited to the embodiments shown herein, and
It is to fit to the widest scope consistent with principles disclosed herein and features of novelty.
Claims (6)
1., for a dc circuit breaker selection method for Multi-end flexible direct current transmission system, described multiterminal are soft
Property DC transmission system include multiple current conversion station, each described current conversion station and one or more dc circuit breaker groups
It is connected；It is characterized in that, described dc circuit breaker selection method includes:
Each described current conversion station is made to be in bipolar short trouble；
Adjust control model and the conveying power of described current conversion station, obtain described current conversion station and produce maximum short circuit
Preferred control model corresponding during electric current and preferably carry power；
Remove break with the direct current treating type selecting according to described preferred control model and described preferably conveying power setting
The current conversion station beyond current conversion station that road device group is connected, treat described in acquisition type selecting dc circuit breaker group position is set
Put the first maximum current near current conversion station side and the time of occurrence of described first maximum current；
According to described preferred control model and described preferably conveying power setting and the described direct current treating type selecting
The described current conversion station that chopper group is connected, treat described in acquisition type selecting dc circuit breaker group arrange on position remote
The second maximum current from current conversion station side and the time of occurrence of described second maximum current；
Relatively described first maximum current and the size of described second maximum current, according to the biggest electric current
And time of occurrence corresponding to described bigger electric current select described in treat in the dc circuit breaker group of type selecting institute
State the type of dc circuit breaker.
Method the most according to claim 1, it is characterised in that described current conversion station uses MMC type
Converter valve.
Method the most according to claim 2, it is characterised in that described by adjusting described current conversion station
Control model and conveying power, obtain when described current conversion station produces maximum short circuit current corresponding preferred
Control model and preferably carry power process particularly as follows:
Use and determine active power controller pattern, adjust the conveying power of described current conversion station, obtain when the described change of current
Stand corresponding first conveying power when producing the first maximum short circuit current；
Use constant DC voltage control pattern, adjust the conveying power of described current conversion station, obtain when the described change of current
Stand corresponding second conveying power when producing the second maximum short circuit current；
Relatively described first maximum short circuit current and the size of described second maximum short circuit current, select the most relatively
Control model that big short circuit current is corresponding and conveying power are as real power control pattern and meritorious conveying
Power；
Use and determine Reactive Power Control pattern, adjust the conveying power of described current conversion station, obtain when the described change of current
Stand corresponding 3rd conveying power when producing three maximum short circuit currents；
Use and determine alternating voltage control model, adjust the conveying power of described current conversion station, obtain when the described change of current
Stand corresponding 4th conveying power when producing four maximum short circuit currents；
Relatively described 3rd maximum short circuit current and the size of described 4th maximum short circuit current, select the most relatively
Control model that big short circuit current is corresponding and conveying power are as idle control model and idle conveying
Power；
Described real power control pattern and described meritorious conveying power and described idle control model and described nothing
Merit conveying power is described preferred control model and described preferably carries power.
Method the most according to claim 3, it is characterised in that described preferably control mould according to described
Formula and described preferably conveying power setting are in addition to the current conversion station being connected with the dc circuit breaker group treating type selecting
Current conversion station after, also include:
Arrange according to described constant DC voltage control pattern described in being connected with the dc circuit breaker group treating type selecting
Current conversion station.
Method the most according to claim 1, it is characterised in that described dc circuit breaker group includes two
Individual described dc circuit breaker.
Method the most according to claim 1, it is characterised in that described Multi-end flexible direct current transmission system
System includes 5 described current conversion stations.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201610286244.XA CN105870956B (en) | 2016-04-29 | 2016-04-29 | A kind of dc circuit breaker selection method for Multi-end flexible direct current transmission system |
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| CN201610286244.XA CN105870956B (en) | 2016-04-29 | 2016-04-29 | A kind of dc circuit breaker selection method for Multi-end flexible direct current transmission system |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN106655237A (en) * | 2016-12-31 | 2017-05-10 | 华中科技大学 | Direct current monopole grounding fault ride-through method for multi-port flexible high-voltage direct current power transmission system |
| CN110854866A (en) * | 2019-11-26 | 2020-02-28 | 华北电力科学研究院有限责任公司 | Reactive voltage control method and device of modular multilevel converter |
| CN112421591A (en) * | 2020-09-29 | 2021-02-26 | 国网福建省电力有限公司电力科学研究院 | Low-voltage current-limiting fixed value adjusting method for restraining flexible direct current near-zone three-phase short-circuit current |
| CN114421420A (en) * | 2022-02-10 | 2022-04-29 | 华北电力大学（保定） | Resistance-inductance current-limiting type multi-port direct-current circuit breaker suitable for flexible direct-distribution power grid |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106655237A (en) * | 2016-12-31 | 2017-05-10 | 华中科技大学 | Direct current monopole grounding fault ride-through method for multi-port flexible high-voltage direct current power transmission system |
| CN106655237B (en) * | 2016-12-31 | 2019-05-14 | 华中科技大学 | The fault ride-through method of multiterminal flexible high pressure DC transmission system DC monopole ground connection |
| CN110854866A (en) * | 2019-11-26 | 2020-02-28 | 华北电力科学研究院有限责任公司 | Reactive voltage control method and device of modular multilevel converter |
| CN110854866B (en) * | 2019-11-26 | 2021-12-17 | 华北电力科学研究院有限责任公司 | Reactive voltage control method and device of modular multilevel converter |
| CN112421591A (en) * | 2020-09-29 | 2021-02-26 | 国网福建省电力有限公司电力科学研究院 | Low-voltage current-limiting fixed value adjusting method for restraining flexible direct current near-zone three-phase short-circuit current |
| CN112421591B (en) * | 2020-09-29 | 2024-01-30 | 国网福建省电力有限公司电力科学研究院 | Low-voltage current-limiting fixed value adjusting method for inhibiting flexible direct-current near-zone three-phase short-circuit current |
| CN114421420A (en) * | 2022-02-10 | 2022-04-29 | 华北电力大学（保定） | Resistance-inductance current-limiting type multi-port direct-current circuit breaker suitable for flexible direct-distribution power grid |
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| CN105870956B (en) | 2018-07-17 |
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