CN110289603A - A kind of parallel connection breaking device, main logical branch and high voltage DC breaker - Google Patents
A kind of parallel connection breaking device, main logical branch and high voltage DC breaker Download PDFInfo
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- CN110289603A CN110289603A CN201910517164.4A CN201910517164A CN110289603A CN 110289603 A CN110289603 A CN 110289603A CN 201910517164 A CN201910517164 A CN 201910517164A CN 110289603 A CN110289603 A CN 110289603A
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- 230000005611 electricity Effects 0.000 claims description 4
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Classifications
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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
This application discloses a kind of breaking device, main logical branch and high voltage DC breakers in parallel, N parallel branch in the through-flow branch of master is set, the both ends of every parallel branch are electrically connected with the both ends of energy absorption branch and transfer branch respectively, and wherein N is greater than or equal to 2.Due to being provided with N parallel branch in the through-flow branch of master, every parallel branch is electrically connected with multiterminal HVDC transmission system difference output end route, and when there are line fault, the parallel branch of corresponding faulty line is cut off, and guarantees the normal operation of entire big system.Due to using multiple parallel branches form, there is no need to every route is arranged in a one-to-one correspondence dc circuit breaker the disconnection of equipment fault route can be realized, reduce the quantity of transfer branch and energy absorption branch, and then reduce the volume and cost of equipment.
Description
Technical field
This application involves high voltage DC breaker technical fields, and in particular to a kind of parallel connection breaking device, main logical branch and
High voltage DC breaker.
Background technique
Multi-terminal direct current transmission system is a kind of power transmission mode flexibly, reliable, economic, it can be achieved that multiple feed, falling more
Point is by electricity.Since multi-terminal direct current transmission system sufficiently develops the economic and technical advantage of high voltage dc transmission technology, it is
A kind of more attractive technology of transmission of electricity, meets the development need of China's power industry.
Dc circuit breaker is the key equipment of multiterminal HVDC transmission system, once therefore multi-terminal high-voltage DC power transmission system
There is commutation failure in a certain end of system, will have an impact to the entire operation of system and power distribution greatly, can make under serious conditions
Failure end is difficult to restore electricity, it is therefore desirable to failure inverter or excision faulty line are disconnected by high voltage DC breaker,
To guarantee the safety of DC transmission system multiterminal operation.
The topological structure of traditional high voltage DC breaker generally comprises three branches: main through-flow branch, transfer branch and
Energy absorption branch, corresponding failure inverter or each route require to be correspondingly arranged a high voltage DC breaker, Jin Ershi
Existing failure inverter or the disconnection for cutting off faulty line.With the raising of system voltage grade and defeated transfer capacitance, power transmission line
Road is increasing, and every route is correspondingly arranged a high voltage DC breaker and equipment volume and cost are improved, thus how
While reducing equipment volume, the disconnection for not influencing equipment fault route is this field urgent problem to be solved.
Summary of the invention
In order to solve the above-mentioned technical problem the application, proposes following technical solution:
In a first aspect, the embodiment of the present application provides a kind of breaking device in parallel, N item in the through-flow branch of master is set simultaneously
Join branch, the both ends of every parallel branch are electrically connected with the both ends of energy absorption branch and transfer branch respectively, and wherein N is big
In or equal to 2.
Using above-mentioned implementation, due to being provided with N parallel branch, every parallel branch and multiterminal in the through-flow branch of master
The electrical connection of HVDC transmission system difference output end route, when there are line fault, in parallel by corresponding faulty line is propped up
Road cutting guarantees the normal operation of entire big system.Due to use multiple parallel branches form, there is no need to by every route one by one
Being correspondingly arranged dc circuit breaker can be realized the disconnection of equipment fault route, reduce the number of transfer branch and energy absorption branch
Amount, and then reduce the volume and cost of equipment.
With reference to first aspect, in a first possible implementation of that first aspect, the parallel branch is provided with machinery
Switch, the both ends of the mechanical switch are electrically connected with the both ends of the parallel branch respectively.
Second aspect, the embodiment of the present application provide a kind of through-flow branch of master, and the through-flow branch of master includes first aspect
Or the breaking device in parallel that first aspect the first possible implementation provides.
The third aspect, the embodiment of the present application provide a kind of high voltage DC breaker, and the master provided including second aspect is logical
Flow branch.
In conjunction with the third aspect, in the third aspect in the first possible implementation, further include energy absorption branch and turn
Branch is moved, the energy absorption branch and the both ends for shifting branch are electrically connected with the both ends of the through-flow branch of the master respectively.
The first possible implementation in conjunction with the third aspect, in second of the third aspect possible implementation, institute
Stating transfer branch includes a transfer inductance, one end of the transfer inductance respectively with one end of the energy absorption branch and described
One end electrical connection of main through-flow branch, the other end of the transfer inductance are electrically connected with one end of a transfer capacitor, tell transfer
The other end of capacitor is electrically connected with one end of a discharge switch, the other end of the discharge switch respectively with the energy absorption branch
The electrical connection of the other end of the other end on road and the through-flow branch of the master.
The first possible implementation in conjunction with the third aspect, in the third aspect in the third possible implementation, institute
Stating energy absorption branch includes an arrester, and both ends of the both ends of the arrester respectively with the energy absorption branch are electrically connected
It connects.
Fourth aspect, the embodiment of the present application provide a kind of high voltage DC breaker application method, using the third aspect or
The high voltage DC breaker that any possible implementation of the third aspect provides, which comprises multi-terminal high-voltage direct current is defeated
The route of electric system is attached with the high voltage DC breaker, wherein the through-flow branch of the master in the high voltage DC breaker
Including a plurality of parallel branch, every parallel branch corresponds to the multiterminal HVDC transmission system difference output end route；When depositing
When first line breaks down, the first parallel branch is cut off by the mechanical switch in the parallel branch, described first
Route is the corresponding route of the multiterminal HVDC transmission system either end, and first parallel branch is and the First Line
The parallel branch of road electrical connection.
In conjunction with fourth aspect, in fourth aspect when there are first line, and event occurs described in the first possible implementation
When barrier, the first parallel branch is cut off by the mechanical switch in the parallel branch, comprising: if the first line occurs
Short trouble then sends separating brake instruction to the high voltage DC breaker；The high voltage DC breaker controls the First Line
Mechanical switch in road disconnects first parallel branch.
Detailed description of the invention
Fig. 1 is a kind of schematic diagram of breaking device in parallel provided by the embodiments of the present application；
Fig. 2 is a kind of structural schematic diagram for leading through-flow branch provided by the embodiments of the present application；
Fig. 3 is a kind of structural schematic diagram of high voltage DC breaker provided by the embodiments of the present application；
Fig. 4 is the structural schematic diagram of another high voltage DC breaker provided by the embodiments of the present application；
Fig. 5 is a kind of flow diagram of high voltage DC breaker application method provided by the embodiments of the present application.
Specific embodiment
This programme is illustrated with specific embodiment with reference to the accompanying drawing.
Fig. 1 is a kind of schematic diagram of breaking device in parallel provided by the embodiments of the present application, referring to Fig. 1, in the present embodiment
Breaking device in parallel includes N parallel branch, and N parallel branch is arranged in the through-flow branch of master, wherein every branch in parallel
The both ends on road are electrically connected with the both ends of the energy absorption branch of high voltage DC breaker and transfer branch.Moreover, the present embodiment
Middle N is more than or equal to 2, therefore the parallel branch in breaking device in parallel provided in this embodiment is at least 2.
In order to realize that the disconnection of every parallel branch of control is provided with mechanical switch in every parallel branch, such as Fig. 1 institute
Show, N parallel branch is corresponded in Fig. 1, therefore mechanical switch is from CB1 to CBN.Unique one of the corresponding control of each mechanical switch
Parallel branch, and the mechanical switch for disconnecting any bar parallel branch does not influence the normal work of other mechanical switch combined floodgate branches
Make.
When the through-flow branch of the master in breaker is using above-mentioned breaking device in parallel, by every parallel branch and multi-terminal high-voltage
The electrical connection of DC transmission system difference output end route, once there are line failure, by the corresponding branch in parallel of faulty line
The mechanical switch on road disconnects, and realizes the cutting of faulty line, ensure that the normal operation of entire big system.
As can be seen from the above embodiments, a kind of breaking device in parallel is present embodiments provided, due to adopting in the through-flow branch of master
With multiple parallel branches form, there is no need to every route is arranged in a one-to-one correspondence dc circuit breaker equipment fault route can be realized
Disconnection, reduce the quantity of transfer branch and energy absorption branch, and then reduce the volume and cost of equipment.
Corresponding with a kind of breaking device in parallel provided by the above embodiment, present invention also provides a kind of through-flow branches of master
Embodiment be referring to fig. 2 a kind of through-flow branch of master provided by the embodiments of the present application, the through-flow branch of master provided in the present embodiment
The breaking device in parallel being provided in above-described embodiment in road includes a plurality of parallel branch, realizes the mesh of corresponding a plurality of route
, and then the disconnection of equipment fault route can be realized it is not necessary that every route is arranged in a one-to-one correspondence dc circuit breaker.
Using the through-flow branch of master shown in Fig. 2, the embodiment of the present application also provides a kind of high voltage DC breakers, referring to figure
3, high voltage DC breaker provided in this embodiment includes the through-flow branch of master, the energy absorption branch for being provided with a plurality of parallel branch
With transfer branch.Both ends of the both ends of the energy absorption branch and the transfer branch respectively with the through-flow branch of the master are electrically connected
It connects.
Further, the transfer branch include one transfer inductance L, it is described transfer inductance L one end respectively with the energy
Amount absorbs one end of branch and one end electrical connection of the through-flow branch of the master, the other end of the transfer inductance and a transfer capacitor
One end of C is electrically connected, and tells that the other end for shifting capacitor C is electrically connected with one end of a discharge switch, the discharge switch it is another
One end is electrically connected with the other end of the other end of the energy absorption branch and the through-flow branch of the master respectively.The energy absorption
Branch includes an arrester, and the both ends of the arrester are electrically connected with the both ends of the energy absorption branch respectively.
In Fig. 3, main through-flow branch includes N parallel branch, and a mechanical switch is arranged in every parallel branch, and transfer branch is set
Being equipped with transfer inductance L, transfer capacitor C and discharge switch, energy absorption branch includes arrester.When normal operation, it is all and
Join the mechanical switch in branch close a floodgate it is through-flow, will be right when any parallel branch or the corresponding line failure of a plurality of branch
Mechanical switch in one or more branch answered disconnects.When need in the branch that disconnects mechanical switch move to it is specified open away from
When, the discharge switch conducting in branch is shifted in triggering will shift branch investment, and the transfer capacitor C in transfer branch passes through transfer
Transfer inductance L electric discharge in road, makes mechanical switch current over-zero blow-out.Mechanical switch puts out post-arc current and is transferred to transfer branch,
Transfer capacitor C charging is given, fracture voltage gradually rises, and when rising to the operation voltage of arrester, Dissipated energy is connected in arrester
Amount, thus the cutting of complete paired transmission line.
Fig. 4 is another high voltage DC breaker provided by the embodiments of the present application, and the high voltage DC breaker in Fig. 4 is this
The corresponding high voltage DC breaker of the least parallel connection breaking device of parallel branch in embodiment.Assuming that multi-terminal high-voltage DC power transmission system
System includes 8 output ends, corresponding 8 routes, using the high voltage DC breaker in Fig. 4, it is only necessary to which 4 can be realized and route
Connection guarantee the cutting of later period faulty line, therefore compared to the corresponding high voltage direct current open circuit of a route in traditional technology
Device reduces equipment volume and cost, nor affects on the cutting of faulty line.
It is a kind of high voltage DC breaker application method provided by the embodiments of the present application referring to Fig. 5, which comprises
The route of multiterminal HVDC transmission system and the high voltage DC breaker are attached by S101.
The through-flow branch of master in the high voltage DC breaker includes a plurality of parallel branch, described in every parallel branch is corresponding
Multiterminal HVDC transmission system difference output end route.
One schematic example, it is assumed that when being attached using high voltage DC breaker, multiterminal HVDC transmission system
There are 16 output ends, then using the high voltage DC breaker for including 16 parallel branches, realizes that a breaker can be realized
The connection of route and the cutting of later period faulty line.
S102, it is in parallel by first by the mechanical switch in the parallel branch when breaking down there are first line
Branch cutting.
First line described in the present embodiment is the corresponding route of the multiterminal HVDC transmission system either end, described
First parallel branch is the parallel branch being electrically connected with the first line.
Specifically, if short trouble occurs for the first line, separating brake is sent to the high voltage DC breaker and is referred to
It enables.The high voltage DC breaker controls the mechanical switch in the first line and disconnects first parallel branch.
It should be noted that, in this document, the relational terms of such as " first " and " second " or the like are used merely to one
A entity or operation with another entity or operate distinguish, without necessarily requiring or implying these entities or operation it
Between there are any actual relationship or orders.Moreover, the terms "include", "comprise" or its any other variant are intended to
Cover non-exclusive inclusion, so that the process, method, article or equipment for including a series of elements not only includes those
Element, but also including other elements that are not explicitly listed, or further include for this process, method, article or setting
Standby intrinsic element.In the absence of more restrictions, the element limited by sentence "including a ...", it is not excluded that
There is also other identical elements in the process, method, article or apparatus that includes the element.
Certainly, above description is also not limited to the example above, technical characteristic of the application without description can by or
It is realized using the prior art, details are not described herein；The technical solution that above embodiments and attached drawing are merely to illustrate the application is not
It is the limitation to the application, Tathagata substitutes, and the application is described in detail only in conjunction with and referring to preferred embodiment, ability
Domain it is to be appreciated by one skilled in the art that those skilled in the art were made in the essential scope of the application
Variations, modifications, additions or substitutions also should belong to claims hereof protection scope without departure from the objective of the application.
Claims (9)
1. a kind of parallel connection breaking device characterized by comprising N parallel branch in the through-flow branch of master, every institute is arranged in
The both ends for stating parallel branch are electrically connected with the both ends of energy absorption branch and transfer branch respectively, and wherein N is greater than or equal to 2.
2. parallel connection breaking device according to claim 1, which is characterized in that the parallel branch is provided with mechanical switch,
The both ends of the mechanical switch are electrically connected with the both ends of the parallel branch respectively.
3. a kind of through-flow branch of master, which is characterized in that the through-flow branch of master includes that parallel connection of any of claims 1 or 2 is cut-off
Device.
4. a kind of high voltage DC breaker, which is characterized in that including leading through-flow branch as claimed in claim 3.
5. high voltage DC breaker according to claim 4, which is characterized in that further include energy absorption branch and transfer branch
The both ends of road, the energy absorption branch and the transfer branch are electrically connected with the both ends of the through-flow branch of the master respectively.
6. high voltage DC breaker according to claim 5, which is characterized in that the transfer branch includes a transfer electricity
Sense, the one end of one end of the transfer inductance respectively with one end of the energy absorption branch and the through-flow branch of the master are electrically connected
It connects, the other end of the transfer inductance is electrically connected with one end of a transfer capacitor, tells the other end and the electric discharge of transfer capacitor
One end of switch is electrically connected, and the other end of the discharge switch is logical with the other end of the energy absorption branch and the master respectively
Flow the other end electrical connection of branch.
7. high voltage DC breaker according to claim 5, which is characterized in that the energy absorption branch includes one lightning-arrest
Device, the both ends of the arrester are electrically connected with the both ends of the energy absorption branch respectively.
8. a kind of high voltage DC breaker application method, which is characterized in that using such as the described in any item high pressures of claim 4-7
Dc circuit breaker, which comprises
The route of multiterminal HVDC transmission system and the high voltage DC breaker are attached, wherein the high voltage direct current
The through-flow branch of master in breaker includes a plurality of parallel branch, and every parallel branch corresponds to the multiterminal HVDC transmission system
Different output end routes；
When breaking down there are first line, the first parallel branch is cut off by the mechanical switch in the parallel branch,
The first line be the corresponding route of the multiterminal HVDC transmission system either end, first parallel branch for institute
State the parallel branch of first line electrical connection.
9. high voltage DC breaker application method according to claim 8, which is characterized in that described when there are first line
When breaking down, the first parallel branch is cut off by the mechanical switch in the parallel branch, comprising:
If short trouble occurs for the first line, separating brake instruction is sent to the high voltage DC breaker；
The high voltage DC breaker controls the mechanical switch in the first line and disconnects first parallel branch.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910517164.4A CN110289603A (en) | 2019-06-14 | 2019-06-14 | A kind of parallel connection breaking device, main logical branch and high voltage DC breaker |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910517164.4A CN110289603A (en) | 2019-06-14 | 2019-06-14 | A kind of parallel connection breaking device, main logical branch and high voltage DC breaker |
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| CN110289603A true CN110289603A (en) | 2019-09-27 |
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| CN107947131A (en) * | 2017-11-30 | 2018-04-20 | 天津大学 | Fault insulation and resume method based on micro- loss combined machine formula dc circuit breaker |
| CN108649544A (en) * | 2018-06-01 | 2018-10-12 | 重庆大学 | A kind of mechanical high-voltage dc circuit breaker device and its cutoff method |
| CN109038510A (en) * | 2018-07-25 | 2018-12-18 | 西安交通大学 | A kind of dc circuit breaker |
| US20190006838A1 (en) * | 2016-07-20 | 2019-01-03 | Global Energy Interconnection Research Institute Co., Ltd | Novel combined direct current circuit breaker and application method thereof |
| CN210350780U (en) * | 2019-06-14 | 2020-04-17 | 山东泰开高压开关有限公司 | Parallel connection breaking device, main through-current branch and high-voltage direct-current circuit breaker |
-
2019
- 2019-06-14 CN CN201910517164.4A patent/CN110289603A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20190006838A1 (en) * | 2016-07-20 | 2019-01-03 | Global Energy Interconnection Research Institute Co., Ltd | Novel combined direct current circuit breaker and application method thereof |
| CN107947131A (en) * | 2017-11-30 | 2018-04-20 | 天津大学 | Fault insulation and resume method based on micro- loss combined machine formula dc circuit breaker |
| CN108649544A (en) * | 2018-06-01 | 2018-10-12 | 重庆大学 | A kind of mechanical high-voltage dc circuit breaker device and its cutoff method |
| CN109038510A (en) * | 2018-07-25 | 2018-12-18 | 西安交通大学 | A kind of dc circuit breaker |
| CN210350780U (en) * | 2019-06-14 | 2020-04-17 | 山东泰开高压开关有限公司 | Parallel connection breaking device, main through-current branch and high-voltage direct-current circuit breaker |
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