CN109494693A - A kind of hybrid dc circuit breaker and control method reducing reclosing impact - Google Patents
A kind of hybrid dc circuit breaker and control method reducing reclosing impact Download PDFInfo
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- CN109494693A CN109494693A CN201811366770.2A CN201811366770A CN109494693A CN 109494693 A CN109494693 A CN 109494693A CN 201811366770 A CN201811366770 A CN 201811366770A CN 109494693 A CN109494693 A CN 109494693A
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- 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
- H02H7/268—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 for dc systems
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Abstract
The present invention provides the hybrid dc circuit breakers and control method of a kind of reduction reclosing impact, comprising: main through-flow branch, main cutout branch and coincidence damping branch；Being overlapped damping branch includes multiple damping units, and multiple damping units are connected in series, and each damping unit includes an electronic power switch and a damping resistance, and electronic power switch and damping resistance are in parallel；Be overlapped damping branch connect with main cutout branch after with the through-flow branch circuit parallel connection of master, for reducing reclosing when permanent fault the secondary pulse caused by system.Breaker of the invention, which can not only impact reclosing, is reduced to minimum, but also can accurately detect high resistant property permanent fault, realizes flexible reclosing.
Description
Technical field
The present invention relates to power electronics field more particularly to a kind of hybrid direct current interruptions for reducing reclosing impact
Device and control method.
Background technique
With the development of device for high-power power electronic, the direct current transportation based on voltage source converter, due to its it is idle and
It is active can independent control, without filtering and reactive-load compensation equipment, can to passive load power, trend overturn when polarity of voltage not change
The advantages such as change, become the main direction of development of direct current transportation.But since the equipment such as transformer are not present in DC power transmission line,
So line reactance is low, when short trouble occurs, short circuit current rises fast, amplitude height.Meanwhile DC power transmission line exists largely
Power electronic devices if failure occurs, and cannot promptly isolate failure, and power electronic devices will be made to bear huge overcurrent
Pressure, or even damage device, make entire power transmission network paralyse.
Currently, including mainly 3 kinds of solutions for the short trouble that DC line occurs: AC circuit breaker movement is changed
It flows device full-bridge sub-modular structure and removes failure, dc circuit breaker isolated fault.Wherein, short using AC circuit breaker isolated DC side
Road failure needs at least 2-3 cycle, which is just able to achieve, to be cut-off, and is not able to satisfy speed requirement of the direct current system to fault clearance, together
When AC circuit breaker operation will cause system short term outage, reboot time is long, influences operational reliability；Inverter full-bridge
Submodule realizes Fault Isolation by the working condition of switching IGBT, and actuation time is short, but the demand of electronic device IGBT increases
By about one time, corresponding converter station cost and running wastage are significantly increased；Hybrid dc circuit breaker combines mechanical and solid state
The advantages of dc circuit breaker: switch off time is short (within 5ms), can promptly isolate DC side transmission line malfunction, reduces converter valve
And the overcurrent stress of DC side overhead transmission line, furthermore this kind of breaker main branch is mechanical switch, and more all solid state formula is straight
Stream breaker running wastage is greatly reduced.In conclusion hybrid dc circuit breaker is cut-off, rapid, loss is low, is high-voltage flexible
The primary selection of direct current overhead power transmission engineering.
Since in flexible direct current overhead power transmission system, temporary short trouble event is increased sharply, dc circuit breaker is temporary in isolation
Reclosing operation must be carried out after when property short trouble, to guarantee system reliable power supply.Current reclosing recovery policy are as follows: when event
Hinder wireline inspection to DC current be 0, and after having reached and going the free time, DC line automatic reclosing, reclosing number
Add 1；If after reclosing, failure is not detected in converter station, show that DC Line Fault is transient fault, system restores normal fortune
Row；If after reclosing, converter station detects failure again, show that DC Line Fault is permanent fault, DC line both ends
Breaker trips again, and is latched automatic reclosing function, and after line maintenance, closing by hand, system is restored to operate normally.This
The shortcomings that kind recovery policy, is that reclosing when permanent fault, can cause secondary hazards to system, be unfavorable for the peace of system
Entirely.
However, there is presently no being directed to how to reduce the aspect research of the secondary pulse caused by system of breaker reclosing,
Relevant research relates generally to the limitation of short circuit current climbing when failure occurs, by increasing in hybrid dc circuit breaker periphery
Add current-limiting circuit, the shortcomings that the prior art are as follows: current-limiting inductance also puts into operation when operating normally, and the dynamic for reducing control is rung
Speed is answered, the risk of voltage oscillation is increased；When reclosing is when permanent fault, current-limiting inductance can only fault current limiting it is upper
The rate of liter, is equivalent to and plays buffer function to combined floodgate, can not reduce the size of fault current, thus cannot reduce reclosing in forever
The secondary pulse of long failure.
Summary of the invention
It is above-mentioned to solve the present invention provides the hybrid dc circuit breaker and control method of a kind of reduction reclosing impact
Problem.
To achieve the goals above, this invention takes following technical solutions.
An aspect of of the present present invention provides a kind of hybrid dc circuit breaker of reduction reclosing impact, comprising: master is through-flow
Branch, main cutout branch and coincidence damping branch.
Being overlapped damping branch includes multiple damping units, and multiple damping units are connected in series, each damping unit packet
An electronic power switch and a damping resistance are included, the electronic power switch and damping resistance are in parallel；
It is overlapped after damping branch is connected with the main cutout branch and the through-flow branch circuit parallel connection of master；
Coincidence damping branch secondary pulse caused by system when permanent fault for reducing reclosing.
Further, electronic power switch includes insulated gate bipolar transistor IGBT and diode, the IGBT and
Diode opposite direction is in parallel.
Further, as the IGBT in the breaker that the breaker is electrode line road, the coincidence damping branch
Positive direction is directed toward line side；When the breaker that the breaker is anode circuit, the IGBT of the coincidence damping branch is just
Direction should be directed toward bus bar side.
Further, according to after all damping resistances investment, reclosing goes out in breaker for the resistance value selection of damping resistance
Dash current peak value when mouth metallicity failure is less than the load current value of route.
Further, main through-flow branch includes a Fast mechanical switch and an assist exchanging circuit switch, and the master is logical
Stream branch is used to be connected electric current when system operates normally.
Further, assist exchanging circuit switch is two groups of concatenated electronic power switches of opposite direction.
Further, main cutout branch be multiple concatenated interruption units, the interruption units include solid-state switch and
Arrester, the solid-state switch and arrester are parallel with one another, and the main cutout branch is used for failure electricity when DC Line Fault
Circulation moves, cut-offs absorption with fault energy.
Further, solid-state switch is one group of concatenated electronic power switch of opposite direction, and the arrester is metal oxygen
Compound arrester.
Another aspect provides it is a kind of reduction reclosing impact hybrid dc circuit breaker control method,
Include the following steps:
A) fault case breaking course: when short trouble occurs, line current rises, and fault current flows only through main through-flow branch
Road；After receiving trip signal, all electronic power switches in main cutout branch are connected, while being latched assist exchanging circuit switch,
It is to be converted complete, Fast mechanical switch is cut-off, Fast mechanical switch is cut-off without arc；When Fast mechanical switch reach effectively open away from,
It is latched the electronic power switch of main cutout branch, finally after the completion of stopping, lock-reclosing damps the electronic power switch of branch；
B) reclosing process:
Electronic power switch all in main cutout branch is connected, sequentially turns on the power electronics being overlapped in damping branch and opens
It closes, if being overlapped brake current satisfaction has stream criterion, then it represents that reclosing stops reclosing and be latched main cutout branch in permanent fault
Road and the electronic power switch being overlapped in damping branch；It is still unsatisfactory for after all damping resistance bypasses if will be overlapped in damping branch
There is stream criterion, then it represents that route happens is that transient fault and having restored to insulate, open by the Quick mechanical of the main through-flow branch of closure
It closes, conducting assist exchanging circuit switch is latched all electronic power switches of main cutout branch, and reclosing is completed.
Further, stream criterion judges according to the following formula (1):
I > 1.5*Iset (1)
Wherein, the reclosing current instantaneous value of i --- measurement, Iset--- without reclosing when being overlapped damping branch in zero load
The charging current peak value of route.
It can be seen from the technical solution that the hybrid dc circuit breaker for reducing reclosing impact of aforementioned present invention provides
The present invention connect in main circuit breaker branch coincidence damping branch, can reduce reclosing when permanent fault fault current it is big
It is small, reduce the secondary pulse to system；It is more resistance series connection and flexible controllable for being overlapped damping branch, and when reclosing passes through damping resistance
Reclosing can not only be impacted and be reduced to minimum, but also can accurately detect that high resistant property is permanent by the cooperation of investment and bypass
Failure realizes flexible reclosing.
The additional aspect of the present invention and advantage will be set forth in part in the description, these will become from the following description
Obviously, or practice through the invention is recognized.
Detailed description of the invention
In order to illustrate the technical solution of the embodiments of the present invention more clearly, required use in being described below to embodiment
Attached drawing be briefly described, it should be apparent that, the accompanying drawings in the following description is only one embodiment of the present of invention, for this
For the those of ordinary skill of field, without creative efforts, it can also be obtained according to these attached drawings others
Attached drawing.
Fig. 1 is the hybrid direct-current breaker topology figure of positive route for reducing reclosing impact of the embodiment of the present invention；
Fig. 2 is the topological diagram of the interruption units of the embodiment of the present invention；
Fig. 3 is the topological schematic diagram that the breaker stable state of the embodiment of the present invention is connected；
Fig. 4 is the circuit breaker failure state breaking course topology schematic diagram of the embodiment of the present invention；
Fig. 5 is the breaker reclosing of the embodiment of the present invention in the topological diagram of permanent fault；
Fig. 6 is that the breaker of the embodiment of the present invention waits for the trouble-free topological diagram of reclosing route.
Specific embodiment
Embodiments of the present invention are described below in detail, the example of the embodiment is shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and for explaining only the invention, and is not construed as limiting the claims.
Those skilled in the art of the present technique are appreciated that unless expressly stated, singular " one " used herein, " one
It is a ", " described " and "the" may also comprise plural form.It is to be further understood that being arranged used in specification of the invention
Diction " comprising " refer to that there are the feature, integer, step, operation, element and/or component, but it is not excluded that in the presence of or addition
Other one or more features, integer, step, operation, element, component and/or their group.It should be understood that when we claim member
Part is " connected " or when " coupled " to another element, it can be directly connected or coupled to other elements, or there may also be
Intermediary element.In addition, " connection " used herein or " coupling " may include being wirelessly connected or coupling.Wording used herein
"and/or" includes one or more associated any cells for listing item and all combinations.
Those skilled in the art of the present technique are appreciated that unless otherwise defined, all terms used herein (including technology art
Language and scientific term) there is meaning identical with the general understanding of those of ordinary skill in fields of the present invention.Should also
Understand, those terms such as defined in the general dictionary, which should be understood that, to be had and the meaning in the context of the prior art
The consistent meaning of justice, and unless defined as here, it will not be explained in an idealized or overly formal meaning.
In order to facilitate understanding of embodiments of the present invention, further by taking specific embodiment as an example below in conjunction with attached drawing to be solved
Release explanation.
Embodiment
Fig. 1 is the hybrid direct-current breaker topology figure of positive route for reducing reclosing impact of the embodiment of the present invention, ginseng
According to Fig. 1, which includes: main through-flow branch, main cutout branch and coincidence damping branch.
Being overlapped damping branch includes multiple damping units, and multiple damping units are connected in series, and each damping unit includes one
Electronic power switch and a damping resistance, electronic power switch and damping resistance are in parallel.
It is overlapped after damping branch is connected with the main cutout branch and the through-flow branch circuit parallel connection of master；It is overlapped damping branch
Road secondary pulse caused by system when permanent fault for reducing reclosing.
Wherein, electronic power switch includes insulated gate bipolar transistor (Insulated Gate Bipolar
Transistor, IGBT) and diode, IGBT and diode opposite direction parallel connection.
Preferably, when the IGBT positive direction in the breaker that breaker is electrode line road, the coincidence damping branch refers to
To line side, referring to Fig.1；When the breaker that the breaker is anode circuit, the IGBT of the coincidence damping branch is just
Direction should be directed toward bus bar side.Wherein, breaker is mounted between DC bus and DC line, and line side is that breaker leans near line
The side on road, bus bar side are breaker close to the side of bus.
Preferably, it the resistance value selection of damping resistance: according to after all damping resistances are put into, closes a floodgate and exports gold in breaker
Dash current peak value when attribute failure is less than the load current value of route.Metallicity failure refers to that the positive and negative anodes of breaker outlet are straight
Flow Line directly connects, and does not pass through the short trouble of transition resistance.
Wherein, main through-flow branch includes a Fast mechanical switch and an assist exchanging circuit switch.Assist exchanging circuit switchs
Two groups of concatenated electronic power switches of opposite direction.Main through-flow branch is used to be connected electric current when system operates normally.
Main cutout branch is multiple concatenated interruption units, and the interruption units include solid-state switch and arrester, Fig. 2
For the topological diagram of the interruption units of the embodiment of the present invention, referring to Fig. 2, solid-state switch and arrester are parallel with one another, and the master is disconnected
It flows fault current transfer when branch is used for DC Line Fault, cut-off the absorption with fault energy.Preferably, solid-state switch is one group
The concatenated electronic power switch of opposite direction, arrester are metal oxide arrester.
On the other hand, the present invention provides it is a kind of reduction reclosing impact hybrid dc circuit breaker control method,
The breaker is in stable state on state under normal circumstances, that is, the mechanical switch of main through-flow branch is in closed state, and auxiliary is changed
Stream switch is in the conductive state；The electronic power switch of main cutout branch is in blocking；It is overlapped the electric power electricity of damping branch
Sub switch is in the conductive state, and steady state run current all flows through main through-flow branch.The control method of the breaker mainly includes
Fault case disjunction and reclosing process, specifically include:
A) fault case breaking course: when short trouble occurs, line current is risen rapidly, and fault current flows only through main logical
Flow branch；After receiving trip signal, all electronic power switches in main cutout branch are connected, while being latched assist exchanging circuit and opening
It closes, it is to be converted complete, Fast mechanical switch is cut-off, Fast mechanical switch is cut-off without arc；It is effectively opened when Fast mechanical switch reaches
Away from the electronic power switch of the main cutout branch of locking, finally after the completion of stopping, the power electronics of lock-reclosing damping branch is opened
It closes；
B) reclosing process:
Electronic power switch all in main cutout branch is connected, sequentially turns on the power electronics being overlapped in damping branch and opens
It closes, if being overlapped brake current satisfaction has stream criterion, then it represents that reclosing stops reclosing and be latched main cutout branch in permanent fault
Road and the electronic power switch being overlapped in damping branch；It is still unsatisfactory for after all damping resistance bypasses if will be overlapped in damping branch
There is stream criterion, then it represents that route happens is that transient fault and having restored to insulate, open by the Quick mechanical of the main through-flow branch of closure
It closes, conducting assist exchanging circuit switch is latched all electronic power switches of main cutout branch, and reclosing is completed.
Preferably, stream criterion judges according to the following formula (1):
I > 1.5*Iset (1)
Wherein, the reclosing current instantaneous value of i --- measurement, Iset--- without reclosing when being overlapped damping branch in zero load
The charging current peak value of route.
Work of the hybrid direct-current breaker topology figure of positive route for reducing reclosing impact to breaker referring to Fig.1
Method is further illustrated:
(1) stable state on state: the mechanical switch of main through-flow branch is in closed state, and assist exchanging circuit switch is on
State；The electronic power switch of main cutout branch is in blocking；The electronic power switch for being overlapped damping branch is on
State.Steady state run current all flows through main through-flow branch, and Fig. 3 is that the topology that the breaker stable state of the embodiment of the present invention is connected is shown
It is intended to, referring to Fig. 3, at this point, operating current flows only through main through-flow branch.
(2) fault case disjunction
Since stable state disjunction is consistent with fault case disjunction operating principle, only breaking current is different, and stable state disjunction is normal
Electric current, fault case disjunction are therefore fault current is only illustrated by taking fault case breaking course as an example, and Fig. 4 is that the present invention is implemented
The circuit breaker failure state breaking course topology schematic diagram of example.
When short trouble occurs, line current rises, and fault current flows only through main through-flow branch, as shown in Fig. 4 (a)；
When fault current reaches the setting value of breaker actuation (i.e. after receiving trip signal), be connected all in main cutout branch
Electronic power switch, while it being latched assist exchanging circuit switch, at this point, the electric current for flowing through main through-flow branch is transformed into rapidly main cutout branch
In road and coincidence damping branch, as shown in Fig. 4 (b)；Complete (Fast mechanical switch electric current is zero) to be converted, cut-offs Quick mechanical
Switch, Fast mechanical switch are cut-off without arc, are effectively opened when Fast mechanical switch reaches away from the power electronics of the main cutout branch of locking
Switch, resulting over-voltage breakdown arrester, fault current flow through arrester and damping unit electronic power switch, and by
It is absorbed into zero, as shown in Fig. 4 (c)；Finally, the electronic power switch of lock-reclosing damping branch, failure breaking course are completed, such as
Shown in Fig. 4 (d).
(3) reclosing
Reclosing is embodied in the investment and bypass for being overlapped damping branch with the difference of stable state on state.When according to reclosing
Whether failure, which has been eliminated, can be divided into reclosing process reclosing in two kinds of feelings of permanent fault and route fault-free to be overlapped
Condition, Fig. 5 are the breaker reclosing of the embodiment of the present invention in the topological diagram of permanent fault, and Fig. 6 is the disconnected of the embodiment of the present invention
Road device waits for the trouble-free topological diagram of reclosing route.
In two kinds of situation for area, definition has stream criterion, according to without reclosing filling in nonloaded line when being overlapped damping branch
Electric current peak determines.Having stream criterion, formula (1) determines according to the following formula:
I > 1.5*Iset (1)
Wherein, the reclosing current instantaneous value of i --- measurement, Iset--- without reclosing when being overlapped damping branch in zero load
The charging current peak value of route.
1. reclosing is in permanent fault
Before reclosing, all kinds of switches in breaker are all in off-state, as shown in Fig. 5 (a)；First turn on main cutout
All electronic power switches in branch, the electronic power switch being overlapped in damping branch keep locking, that is, are overlapped damping branch
Damping resistance all put into, at this point, electric current flow through main cutout branch and be overlapped damp branch, as shown in Fig. 5 (b)；Successively lead
Lead to the corresponding electronic power switch of each damping unit, i.e., successively bypass each damping resistance, is overlapped shown in brake current such as Fig. 5 (c)；?
During successively bypassing each damping resistance, indicated if being overlapped brake current satisfaction to have stream criterion reclosing in permanent fault,
The electronic power switch for stopping reclosing and being latched main cutout branch and being overlapped in damping branch, as shown in Fig. 5 (d).
2. to reclosing route fault-free
Before reclosing, all kinds of switches in breaker are all in shown in the state of cut-offfing such as Fig. 6 (a)；First turn on main cutout
All electronic power switches in branch, the electronic power switch being overlapped in damping branch keep locking, that is, are overlapped damping branch
Damping resistance all put into, at this point, electric current flow through main cutout branch and be overlapped damp branch, as shown in Fig. 6 (b)；Successively lead
Lead to the corresponding electronic power switch of each damping unit, i.e., successively bypass each damping resistance, is overlapped shown in brake current such as Fig. 6 (c)；If
Stream criterion will be still unsatisfactory for after the bypass of all damping resistances, then it represents that route is happens is that transient fault, and failure is
Through removing, that is, to reclosing route fault-free, at this time shown in circuit-breaker status such as Fig. 6 (d)；It executes breaker and opens operation, close
The Fast mechanical switch of main through-flow branch is closed, mechanical switch is closed under zero current, as shown in Fig. 6 (e)；Then, conducting auxiliary
Commutation switch is reduced since the on-state of the through-flow branch of master is pressed in main cutout branch and is overlapped at damping branch, so electric current is gradually
To the through-flow branch transfer of master, as shown in Fig. 6 (f)；Stablize to electric current, is latched all electronic power switches (weight of main cutout branch
Damping branch switch is closed to be held on), opening process is completed, as shown in Fig. 6 (g).
The specific method for carrying out reclosing control with the breaker of the embodiment of the present invention is similar to the previous method embodiment, this
Place repeats no more.
In conclusion the embodiment of the present invention after main cutout branch by increasing by electronic power switch and damping resistance
Coincidence in parallel damps branch.When reclosing, is cooperated by the investment of damping unit, bypass, both reduced reclosing in permanent
To the secondary pulse of system when failure, but can avoid due to investment damping resistance value it is improper cause nature of trouble (transient fault and
Permanent fault) it judges incorrectly and then is impacted to system bring reclosing.
Those of ordinary skill in the art will appreciate that: attached drawing is the schematic diagram of one embodiment, and the casting in attached drawing is simultaneously
It is not necessarily necessary to the implementation present invention.
As seen through the above description of the embodiments, those skilled in the art can be understood that the present invention can
It realizes by means of software and necessary general hardware platform.Based on this understanding, technical solution of the present invention essence
On in other words the part that contributes to existing technology can be embodied in the form of software products, the computer software product
It can store in storage medium, such as ROM/RAM, magnetic disk, CD, including some instructions are used so that a computer equipment
(can be personal computer, server or the network equipment etc.) executes the certain of each embodiment or embodiment of the invention
Method described in part.
The foregoing is only a preferred embodiment of the present invention, but scope of protection of the present invention is not limited thereto,
In the technical scope disclosed by the present invention, any changes or substitutions that can be easily thought of by anyone skilled in the art,
It should be covered by the protection scope of the present invention.Therefore, protection scope of the present invention should be with scope of protection of the claims
Subject to.
Claims (10)
1. a kind of hybrid dc circuit breaker for reducing reclosing impact characterized by comprising main through-flow branch, main cutout
Branch and coincidence damping branch；
The coincidence damping branch includes multiple damping units, and multiple damping units are connected in series, each damping unit
Including an electronic power switch and a damping resistance, the electronic power switch and damping resistance are in parallel；
The described coincidence damping branch connect with the main cutout branch after with the through-flow branch circuit parallel connection of master；
Coincidence damping branch secondary pulse caused by system when permanent fault for reducing reclosing.
2. breaker according to claim 1, which is characterized in that the electronic power switch includes insulated gate bipolar
Transistor IGBT and diode, the IGBT and diode opposite direction are in parallel.
3. breaker according to claim 2, which is characterized in that when the breaker be electrode line road breaker,
IGBT positive direction in the coincidence damping branch is directed toward line side；When the breaker be anode circuit breaker,
The IGBT positive direction of the coincidence damping branch should be directed toward bus bar side.
4. breaker according to claim 1, which is characterized in that the resistance value selection of the damping resistance is according to when all
After damping resistance investment, dash current peak value of reclosing when breaker exports metallicity failure is less than the rated current of route
Value.
5. breaker according to claim 1, which is characterized in that the master is through-flow, and branch includes that a Quick mechanical is opened
It closes and an assist exchanging circuit switchs, the master is through-flow, and branch is used to be connected electric current when system operates normally.
6. breaker according to claim 5, which is characterized in that the assist exchanging circuit switch is two groups of opposite direction series connection
Electronic power switch.
7. breaker according to claim 1, which is characterized in that the main cutout branch is that multiple concatenated cutout are single
Member, the interruption units include solid-state switch and arrester, and the solid-state switch and arrester are parallel with one another, the master
Absorption with fault energy is cut-off in fault current transfer when cutout branch is used for DC Line Fault.
8. breaker according to claim 7, which is characterized in that the solid-state switch is one group of concatenated electricity of opposite direction
Power electronic switch, the arrester are metal oxide arrester.
9. a kind of control method of the described in any item breakers of claim 1-8, which comprises the steps of:
A) fault case breaking course: when short trouble occurs, line current rises, and fault current flows only through main through-flow branch；
After receiving trip signal, all electronic power switches in main cutout branch are connected, while being latched assist exchanging circuit switch, wait turn
It changes completely, cut-offs Fast mechanical switch, Fast mechanical switch is cut-off without arc；It effectively opens when Fast mechanical switch reaches away from locking
The electronic power switch of main cutout branch, finally after the completion of stopping, lock-reclosing damps the electronic power switch of branch；
B) reclosing process:
Electronic power switch all in main cutout branch is connected, sequentially turns on the electronic power switch being overlapped in damping branch,
If being overlapped brake current satisfaction has stream criterion, then it represents that reclosing stops reclosing and be latched main cutout branch in permanent fault
With the electronic power switch being overlapped in damping branch；It has still been unsatisfactory for after all damping resistance bypasses if will be overlapped in damping branch
Flowing criterion, then it represents that for route happens is that transient fault and having restored to insulate, closure leads the Fast mechanical switch of through-flow branch,
Assist exchanging circuit switch is connected, is latched all electronic power switches of main cutout branch, reclosing is completed.
10. control method according to claim 9, which is characterized in that described has stream criterion to sentence according to the following formula (1)
It is disconnected:
I > 1.5*Iset (1)
Wherein, the reclosing current instantaneous value of i --- measurement, Iset--- without reclosing when being overlapped damping branch in nonloaded line
Charging current peak value.
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| CN110071475A (en) * | 2019-03-26 | 2019-07-30 | 国网江苏省电力有限公司 | Reclosing method and reclosing device |
| CN110137922A (en) * | 2019-05-30 | 2019-08-16 | 华中科技大学 | It is a kind of that the soft adaptive reclosing method of straight power grid is maked somebody a mere figurehead based on disturbance injection |
| WO2020191847A1 (en) * | 2019-03-28 | 2020-10-01 | 北京交通大学 | Annular bridge-type multi-port hybrid direct-current circuit breaker |
| WO2020198987A1 (en) * | 2019-03-29 | 2020-10-08 | Siemens Aktiengesellschaft | Method and apparatus for controlling solid state circuit breaker, and solid state circuit breaker |
| CN111900703A (en) * | 2020-06-18 | 2020-11-06 | 平高集团有限公司 | Hybrid direct current breaker |
| CN112736751A (en) * | 2020-12-08 | 2021-04-30 | 平高集团有限公司 | Offshore wind power networking direct current breaker |
| CN112909899A (en) * | 2021-01-19 | 2021-06-04 | 山东大学 | Multi-port hybrid direct-current circuit breaker with self-adaptive reclosing function and control method |
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| CN110137922A (en) * | 2019-05-30 | 2019-08-16 | 华中科技大学 | It is a kind of that the soft adaptive reclosing method of straight power grid is maked somebody a mere figurehead based on disturbance injection |
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| CN112736751A (en) * | 2020-12-08 | 2021-04-30 | 平高集团有限公司 | Offshore wind power networking direct current breaker |
| CN112736751B (en) * | 2020-12-08 | 2023-03-24 | 平高集团有限公司 | Offshore wind power networking direct current breaker |
| CN112909899A (en) * | 2021-01-19 | 2021-06-04 | 山东大学 | Multi-port hybrid direct-current circuit breaker with self-adaptive reclosing function and control method |
| CN112909899B (en) * | 2021-01-19 | 2022-04-15 | 山东大学 | Multi-port hybrid direct-current circuit breaker with self-adaptive reclosing function and control method |
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