CN109888756A - A kind of superconducting current-limiting circuit, superconducting current-limiting control system and control method - Google Patents
A kind of superconducting current-limiting circuit, superconducting current-limiting control system and control method Download PDFInfo
- Publication number
- CN109888756A CN109888756A CN201910294504.1A CN201910294504A CN109888756A CN 109888756 A CN109888756 A CN 109888756A CN 201910294504 A CN201910294504 A CN 201910294504A CN 109888756 A CN109888756 A CN 109888756A
- Authority
- CN
- China
- Prior art keywords
- limiting
- superconducting current
- current
- unit
- outgoing line
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Classifications
-
- 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
- Y02E40/00—Technologies for an efficient electrical power generation, transmission or distribution
- Y02E40/60—Superconducting electric elements or equipment; Power systems integrating superconducting elements or equipment
Landscapes
- Emergency Protection Circuit Devices (AREA)
Abstract
This application discloses a kind of superconducting current-limiting circuit, superconducting current-limiting control system and control methods, it is switched using two superconducting current-limiting units, three outgoing line units and two switchings, reclosing situation is cut-off in conjunction with circuit breaker Q F, the opening closure of control switching switch, different current limiting units can be made to be connected in power grid, to realize the reclosing function with circuit breaker Q F, solves the technical issues of existing resistive superconducting current limiter is not able to satisfy reclosing requirement, influences operation of power networks reliability.
Description
Technical field
This application involves superconducting current-limiting technical field more particularly to a kind of superconducting current-limiting circuits, superconducting current-limiting control system
And control method.
Background technique
During operation of power networks, excessive failed shorted electric current is a urgent problem needed to be solved.Current limiter is a kind of string
It is associated among power grid, shows low resistance in normal state, short circuit occurs in power grid, when line current increases to a degree of
It waits, resistance increases, and to the device that short circuit current is limited, provides strong protection support work for the stable operation of power grid
With.
Resistive superconducting current limiter is a kind of current limiter made using superconductor special characteristics, and superconductor is just
In normal situation, resistance is almost nil, but is more than its critical value, superconducting characteristic will after electric current increases to a certain extent
It loses and (enters and quench state), at this point, superconductor is shown as high-ohmic, meet current limiter low electricity under normal current
It hinders (or zero resistance), is high resistance requirement in failure high current.
In the design scheme of current DC grid, resistive superconducting current limiter and breaker are to be connected in series in the line
, superconductor, which quenches, when short trouble occurs, in current limiter generates resistance limiting short-circuit current, while breaker disconnects, by
It is slow (for second grade) in resistive superconducting current limiter recovery time, cannot restore in a short time, be not able to satisfy reclosing requirement (when
Between be Millisecond) the case where, will affect the operational reliability of power grid, in this regard, this application provides a kind of superconducting current-limiting circuit,
Superconducting current-limiting control system and control method, for solving the problems, such as the reclosing of current limiter.
Summary of the invention
It is existing to solve this application provides a kind of superconducting current-limiting circuit, superconducting current-limiting control system and control method
Resistive superconducting current limiter the technical issues of not being able to satisfy reclosing requirement, influencing operation of power networks reliability.
The application first aspect provides a kind of superconducting current-limiting circuit, comprising: current limiting unit and breaker；
The current limiting unit and breaker series connection；
The current limiting unit includes: the first superconducting current-limiting unit, the second superconducting current-limiting unit, the first switching switch, second
Switch switch, the first outgoing line unit, the second outgoing line unit and third outgoing line unit；
The first switching switch is connect with the common end of the second switching switch with one end of second outgoing line unit；
The common end and second outgoing line unit of the first superconducting current-limiting unit and the second superconducting current-limiting unit
The other end connection；
First outgoing line unit is connect with the first switching switch, the first superconducting current-limiting unit, with described the
One switching switch, the first superconducting current-limiting unit and second outgoing line unit form the first circuit；
The third outgoing line unit is connect with the second switching switch, the second superconducting current-limiting unit, with described the
Two switching switches, the second superconducting current-limiting unit and second outgoing line unit form second servo loop.
The application second aspect provides a kind of superconducting current-limiting control system, including surpassing described in controller and first aspect
Lead current-limiting circuit；
The controller is electrically connected with the superconducting current-limiting circuit.
The application third aspect provides a kind of superconducting current-limiting control method, for the superconducting current-limiting described in second aspect
It is executed in control system, comprising the following steps:
101, whether detection superconducting current-limiting circuit has short circuit current input, if so, cut-off breaker, and execute step
102；
102, the first switching of closure switch opens the second switching switch, breaker is closed a floodgate again.
As can be seen from the above technical solutions, the application has the following advantages:
A kind of superconducting current-limiting circuit provided herein, comprising: current limiting unit and breaker；Current limiting unit and breaker
Series connection；Current limiting unit includes: the first superconducting current-limiting unit, the second superconducting current-limiting unit, the first switching switchs, the second switching is opened
Pass, the first outgoing line unit, the second outgoing line unit and third outgoing line unit；The common end of first switching switch and the second switching switch
It is connect with one end of the second outgoing line unit；The common end of first superconducting current-limiting unit and the second superconducting current-limiting unit and the second outlet
The other end of unit connects；First outgoing line unit is connect with the first switching switch, the first superconducting current-limiting unit, is opened with the first switching
It closes, the first superconducting current-limiting unit and the second outgoing line unit form the first circuit；Third outgoing line unit and the second switching switch, second
The connection of superconducting current-limiting unit forms second servo loop with the second switching switch, the second superconducting current-limiting unit and the second outgoing line unit.This
The superconducting current-limiting circuit provided is provided, is switched using two superconducting current-limiting units, three outgoing line units and two switchings, in conjunction with disconnected
Road device cut-offs reclosing situation, and the opening closure of control switching switch can be such that different current limiting units is connected in power grid,
To realize the reclosing function with breaker, solves existing resistive superconducting current limiter and is not able to satisfy reclosing requirement,
The technical issues of influencing operation of power networks reliability.
Detailed description of the invention
In order to more clearly explain the technical solutions in the embodiments of the present application, make required in being described below to embodiment
Attached drawing is briefly described, it should be apparent that, the drawings in the following description are only some examples of the present application, for
For those of ordinary skill in the art, without any creative labor, it can also be obtained according to these attached drawings
Its attached drawing.
Fig. 1 is a kind of structural schematic diagram of the superconducting current-limiting circuit provided in the embodiment of the present application；
Fig. 2 is the flow diagram for originally asking a kind of superconducting current-limiting control method provided in embodiment；
Wherein, appended drawing reference is as follows:
R1, the first superconducting current-limiting unit；R2, the second superconducting current-limiting unit；A1, the first outgoing line unit；A2, the second outlet list
Member；A3 third outgoing line unit；K1, the first switching switch；K2, the second switching switch；QF, breaker.
Specific embodiment
In order to make those skilled in the art more fully understand application scheme, below in conjunction in the embodiment of the present application
Attached drawing, the technical scheme in the embodiment of the application is clearly and completely described, it is clear that described embodiment is only this
Apply for a part of the embodiment, instead of all the embodiments.Based on the embodiment in the application, those of ordinary skill in the art exist
Every other embodiment obtained under the premise of creative work is not made, shall fall in the protection scope of this application.
In order to make it easy to understand, referring to Fig. 1, this application provides a kind of one embodiment of superconducting current-limiting circuit, this Shen
Please embodiment provide superconducting current-limiting circuit, comprising: current limiting unit and circuit breaker Q F；Current limiting unit and circuit breaker Q F series connection；Limit
Stream unit includes: the first superconducting current-limiting unit R 1, the second superconducting current-limiting unit R 2, first switching switch K1, the second switching switch
K2, the first outgoing line unit A1, the second outgoing line unit A2 and third outgoing line unit A3；First switching switch K1 and the second switching switch
The common end of K2 is connect with one end of the second outgoing line unit A2；First superconducting current-limiting unit R 1 and the second superconducting current-limiting unit R 2
Common end is connect with the other end of the second outgoing line unit A2；The switching of first outgoing line unit A1 and first switch K1, the first superconduction limit
It flows unit R 1 to connect, forms the first circuit with the first switching switch K1, the first superconducting current-limiting unit R 1 and the second outgoing line unit A2；
Third outgoing line unit A3 is connect with the second switching switch K2, the second superconducting current-limiting unit R 2, is switched switch K2 with second, the second is surpassed
It leads current limiting unit R2 and the second outgoing line unit A2 and forms second servo loop.
It should be noted that the superconducting current-limiting circuit provided in the embodiment of the present application is for tool, there are three outgoing line units
A kind of implementation of one resistive superconducting current limiter, on the basis of the embodiment of the present application, those skilled in the art can be with
The superconducting current-limiting circuit of three or more outgoing line units is expanded in conjunction with practical situations.
The first superconducting current-limiting unit R 1, the second superconducting current-limiting unit R 2 in Fig. 1, the first outgoing line unit A1, the second outlet
Unit A2 and third outgoing line unit A3 forms resistive superconducting current limiter, wherein the first superconducting current-limiting unit R 1 and the second superconduction limit
Stream unit R 2 is superconductor, is soaked in the liquid nitrogen in current limiter, and superconducting state, resistance zero are in when normal operation.Current limliting
Device is connect by the first outgoing line unit A1, the second outgoing line unit A2 and third outgoing line unit A3 with extraneous power grid.
It is illustrated below in conjunction with working method of the Fig. 1 to the superconducting current-limiting circuit provided in the embodiment of the present application:
When DC grid operates normally, the first switching switch K1 is disconnected, and the second switching switch K2 is closed, and electric current is from left side
It flows into, by the first outgoing line unit A1, the first superconducting current-limiting unit R 1, the switching switch K2 of the second outgoing line unit A2 and second, then
It is flowed out by circuit breaker Q F, at this point, the second superconducting current-limiting unit R 2 does not have electric current to pass through with third outgoing line unit A3.
When there is short circuit current generation in DC grid, the first superconducting current-limiting unit R 1 is quenched rapidly, is in high-impedance state,
Metering function is played, circuit breaker Q F is disconnected, and the electric current in route is cut off, at this point, the first switching switch K1 rapid closing, second is cut
Switch K2 opening is changed, the first superconducting current-limiting unit R 1 is bypassed into (R1 is in and quenches in recovery process), and the second superconduction is limited
Unit R 2 is flowed to access in power grid.
If subsequent QF closes a floodgate again, electric current passes through the first switching switch K1, the second outgoing line unit A2, the second superconducting current-limiting list
First R2 and third outgoing line unit A3, such as line fault has been eliminated at this time, then power network current restores normal, the second superconducting current-limiting unit
R2 may be connected in power grid and operate normally；If line fault is not eliminated also at this time, then after circuit breaker Q F closes a floodgate, line short circuit current
Again exceeded, then the second superconducting current-limiting unit R 2 plays the role of limiting short-circuit current again, and circuit breaker Q F is again off.
A kind of superconducting current-limiting circuit provided by the embodiments of the present application includes: current limiting unit and circuit breaker Q F；Current limiting unit and
Circuit breaker Q F series connection；Current limiting unit includes: the first superconducting current-limiting unit R 1, the second superconducting current-limiting unit R 2, first switching switch
K1, the second switching switch K2, the first outgoing line unit A1, the second outgoing line unit A2 and third outgoing line unit A3；First switching switch
K1 is connect with the common end of the second switching switch K2 with one end of the second outgoing line unit A2；First superconducting current-limiting unit R 1 and second
The common end of superconducting current-limiting unit R 2 is connect with the other end of the second outgoing line unit A2；First outgoing line unit A1 is opened with the first switching
K1, the connection of the first superconducting current-limiting unit R 1 are closed, with the first switching switch K1, the first superconducting current-limiting unit R 1 and the second outgoing line unit
A2 forms the first circuit；Third outgoing line unit A3 is connect with the second switching switch K2, the second superconducting current-limiting unit R 2, is cut with second
It changes switch K2, the second superconducting current-limiting unit R 2 and the second outgoing line unit A2 and forms second servo loop.Using two superconducting current-limiting units,
Three outgoing line units and two switching switches cut-off reclosing situation in conjunction with circuit breaker Q F, and the opening of control switching switch is closed
It closes, different current limiting units can be made to be connected in power grid, to realize the reclosing function with circuit breaker Q F, solve existing
Resistive superconducting current limiter the technical issues of not being able to satisfy reclosing requirement, influencing operation of power networks reliability.
Present invention also provides a kind of superconducting current-limiting control systems, including controller and superconducting current-limiting circuit above-mentioned to implement
Superconducting current-limiting circuit in example.
In order to make it easy to understand, referring to Fig. 2, present invention also provides a kind of superconducting current-limiting control method, for aforementioned
Superconducting current-limiting control system embodiment in superconducting current-limiting control system in run, comprising the following steps:
Whether step 101, detection superconducting current-limiting circuit have short circuit current input, if so, cut-off breaker, and execute step
Rapid 102.
Step 102, closure the first switching switch, open the second switching switch, breaker are closed a floodgate again.
It is apparent to those skilled in the art that for convenience and simplicity of description, the system of foregoing description,
The specific work process of device and unit, can refer to corresponding processes in the foregoing method embodiment, and details are not described herein.
The description of the present application and term " first " in above-mentioned attached drawing, " second ", " third ", " the 4th " etc. are (if deposited
) it is to be used to distinguish similar objects, without being used to describe a particular order or precedence order.It should be understood that use in this way
Data are interchangeable under appropriate circumstances, so that embodiments herein described herein for example can be in addition to illustrating herein
Or the sequence other than those of description is implemented.In addition, term " includes " and " having " and their any deformation, it is intended that
Cover it is non-exclusive include, for example, containing the process, method, system, product or equipment of a series of steps or units need not limit
In step or unit those of is clearly listed, but may include be not clearly listed or for these process, methods, produce
The other step or units of product or equipment inherently.
Above embodiments are only to illustrate the technical solution of the application, rather than its limitations；Although with reference to the foregoing embodiments
The application is described in detail, those skilled in the art should understand that: it still can be to aforementioned each implementation
Technical solution documented by example is modified or equivalent replacement of some of the technical features；And these modification or
Replacement, the spirit and scope of each embodiment technical solution of the application that it does not separate the essence of the corresponding technical solution.
Claims (3)
1. a kind of superconducting current-limiting circuit characterized by comprising current limiting unit and breaker；
The current limiting unit and breaker series connection；
The current limiting unit includes: the first superconducting current-limiting unit, the second superconducting current-limiting unit, the first switching switch, the second switching
Switch, the first outgoing line unit, the second outgoing line unit and third outgoing line unit；
The first switching switch is connect with the common end of the second switching switch with one end of second outgoing line unit；
The common end of the first superconducting current-limiting unit and the second superconducting current-limiting unit is another with second outgoing line unit
One end connection；
First outgoing line unit is connect with the first switching switch, the first superconducting current-limiting unit, is cut with described first
It changes switch, the first superconducting current-limiting unit and second outgoing line unit and forms the first circuit；
The third outgoing line unit is connect with the second switching switch, the second superconducting current-limiting unit, is cut with described second
It changes switch, the second superconducting current-limiting unit and second outgoing line unit and forms second servo loop.
2. a kind of superconducting current-limiting control system, which is characterized in that including the electricity of superconducting current-limiting described in controller and claim 1
Road；
The controller is electrically connected with the superconducting current-limiting circuit.
3. a kind of superconducting current-limiting control method, for being executed in superconducting current-limiting control system as claimed in claim 2, feature
It is, comprising the following steps:
101, whether detection superconducting current-limiting circuit has short circuit current input, if so, cut-off breaker, and execute step 102；
102, the first switching of closure switch opens the second switching switch, the breaker is closed a floodgate again.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910294504.1A CN109888756A (en) | 2019-04-12 | 2019-04-12 | A kind of superconducting current-limiting circuit, superconducting current-limiting control system and control method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201910294504.1A CN109888756A (en) | 2019-04-12 | 2019-04-12 | A kind of superconducting current-limiting circuit, superconducting current-limiting control system and control method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN109888756A true CN109888756A (en) | 2019-06-14 |
Family
ID=66937159
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201910294504.1A Pending CN109888756A (en) | 2019-04-12 | 2019-04-12 | A kind of superconducting current-limiting circuit, superconducting current-limiting control system and control method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN109888756A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112018740A (en) * | 2020-09-10 | 2020-12-01 | 广东电网有限责任公司电力科学研究院 | Method and device for designing superconducting direct current limiter based on reclosing |
| CN112491023A (en) * | 2020-11-11 | 2021-03-12 | 广东电网有限责任公司 | Superconducting direct current limiter |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1756021A (en) * | 2004-09-28 | 2006-04-05 | 中国科学院电工研究所 | A kind of short-circuit fault current limiter |
| CN1976157A (en) * | 2005-12-02 | 2007-06-06 | Ls产电株式会社 | Electric power circuit protecting apparatus using superconductor |
| CN106786435A (en) * | 2016-11-16 | 2017-05-31 | 合肥普望电子有限责任公司 | A kind of short trouble current-limiting apparatus |
| WO2018115753A1 (en) * | 2016-12-20 | 2018-06-28 | Supergrid Institute | Dc high-voltage electrical installation and method for controlling a switching device in such an installation |
-
2019
- 2019-04-12 CN CN201910294504.1A patent/CN109888756A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1756021A (en) * | 2004-09-28 | 2006-04-05 | 中国科学院电工研究所 | A kind of short-circuit fault current limiter |
| CN1976157A (en) * | 2005-12-02 | 2007-06-06 | Ls产电株式会社 | Electric power circuit protecting apparatus using superconductor |
| CN106786435A (en) * | 2016-11-16 | 2017-05-31 | 合肥普望电子有限责任公司 | A kind of short trouble current-limiting apparatus |
| WO2018115753A1 (en) * | 2016-12-20 | 2018-06-28 | Supergrid Institute | Dc high-voltage electrical installation and method for controlling a switching device in such an installation |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112018740A (en) * | 2020-09-10 | 2020-12-01 | 广东电网有限责任公司电力科学研究院 | Method and device for designing superconducting direct current limiter based on reclosing |
| CN112491023A (en) * | 2020-11-11 | 2021-03-12 | 广东电网有限责任公司 | Superconducting direct current limiter |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| KR100763163B1 (en) | Superconducting fault current limiting system using reclosing scheme | |
| CN107786188B (en) | LC oscillation based forced current exchange type combined switch | |
| US20210226439A1 (en) | Novel dc solid-state circuit breaker with self-adapt current limiting capability and the control method thereof | |
| CN102611082B (en) | Self-adaptive feeder neighborhood interactive fault-tolerant relay protection method for power distribution network | |
| WO2019037728A1 (en) | Reclosing controlling method and apparatus for direct-current circuit breaker, and storage medium | |
| CN102687221A (en) | Device and method to break the current of a power transmission or distribution line and current limiting arrangement | |
| US8284529B2 (en) | Reclosing control system and method using superconducting fault current limiter | |
| CN109687405A (en) | A kind of combined hybrid dc circuit breaker of multiport and control method | |
| CN111357162B (en) | Fault handling in a DC power system | |
| CN109119981B (en) | Direct-current fault current limiting device and system and current limiting control method thereof | |
| CN109888756A (en) | A kind of superconducting current-limiting circuit, superconducting current-limiting control system and control method | |
| CN110137902B (en) | Circuit and method for preventing bypass switch of flexible direct current power module from closing | |
| CN109412127B (en) | Current-limiting resistance-capacitance branch circuit, resistance-capacitance type direct current circuit breaker and control strategy | |
| CN104113057A (en) | Combined type direct current switch equipment and control method thereof | |
| WO2017020269A1 (en) | Bidirectional power valve and control method therefor and hybrid multi-terminal hvdc system using the same | |
| CN113258545A (en) | In-situ feeder automation method and system based on multi-stage time step difference protection | |
| EP4254701A1 (en) | Multiport hybrid direct-current circuit breaker, apparatus, system, and control method therefor | |
| CN110474299B (en) | Bypass state cycle reporting method and topology structure of power unit | |
| CN109586257B (en) | Selective self-adaptive cross-station ring network system fault processing method | |
| CN106998151A (en) | Multilevel converter based on asymmetric Shuangzi module and half-bridge submodule | |
| DE102020210794B3 (en) | Battery storage device, parallel connection of battery storage devices and method for operating a battery storage device | |
| CN109412256B (en) | Standby power supply switching method and device | |
| CN207039192U (en) | Rotation formula Cascade H bridge type dynamic electric voltage recovers and active filter circuit | |
| CN207588451U (en) | Power distribution network four returns one group of topological structure | |
| KR20060099321A (en) | Parallel superconducting fault current limiter system for transmission and distribution line applications |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20190614 |
|
| RJ01 | Rejection of invention patent application after publication |