CN108963994A - A kind of transmission line of electricity optical-fibre channel acceleration distant place back-up protection method - Google Patents
A kind of transmission line of electricity optical-fibre channel acceleration distant place back-up protection method Download PDFInfo
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- CN108963994A CN108963994A CN201810918517.7A CN201810918517A CN108963994A CN 108963994 A CN108963994 A CN 108963994A CN 201810918517 A CN201810918517 A CN 201810918517A CN 108963994 A CN108963994 A CN 108963994A
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- place back
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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
- H02H7/261—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 involving signal transmission between at least two stations
- H02H7/262—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 involving signal transmission between at least two stations involving transmissions of switching or blocking orders
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Abstract
A kind of transmission line of electricity optical-fibre channel acceleration distant place back-up protection method, when short trouble occurs for this line-internal, after the main protection starting operation of this route while issuing trip signal to breaker, when judging main protection breaker failure tripping, main protection sends distant place back-up protection to adjacent lines protective device and accelerates start command, distant place back-up protection is accelerated start command by adjacent lines protective device, the route opposite side protective device is transferred to by optical-fibre channel, after route opposite side protective device receives back-up protection acceleration start command, its distant place back-up protection of Acceleration of starting movement, and with distant place accelerated motion its breaker of time limit tripping.A kind of transmission line of electricity optical-fibre channel of the present invention accelerates distant place back-up protection method, greatly accelerates the movement speed of route distant place back-up protection, shortens fault clearing time, can avoid short trouble and causes bigger baneful influence to system and equipment safety stable operation.
Description
Technical field
A kind of transmission line of electricity optical-fibre channel of the present invention accelerates distant place back-up protection method, belongs to electric grid relay protection technology neck
Domain.
Background technique
In the power system, the step protections device such as current protection, distance protection is very widely used, is used as a distant place
When back-up protection, its operation time limit is adjusted using the ladder principle cooperated step by step, causes rapidity insufficient to guarantee selectivity,
In multilevel system, it can lead to electric power system fault excision total time and maximum duration be too long, it is difficult to guarantee electric system and set
Standby safe and stable operation.
Summary of the invention
In order to solve the problems, such as that back-up protection operation time limit in an electric system distant place is too long, the present invention proposes a kind of transmission line of electricity
Optical-fibre channel accelerates distant place back-up protection method, and this method is after the movement of this line protective devices, through optical-fibre channel to adjacent lines
Line protection device sends distant place back-up protection and accelerates start command, starts the distant place back-up protection of adjacent lines protective device, accelerates
Movement tripping, shortens distant place back-up protection actuation time, to accelerate the short trouble distant place standby mute time.
The technical scheme adopted by the invention is as follows:
A kind of transmission line of electricity optical-fibre channel acceleration distant place back-up protection method, when short trouble occurs for this line-internal, this
After the main protection starting operation of route while issuing trip signal to breaker, main protection breaker failure tripping is being judged
When, main protection sends distant place back-up protection to adjacent lines protective device and accelerates start command, and adjacent lines protective device will be remote
Square back-up protection accelerates start command, is transferred to the route opposite side protective device, the route opposite side protection by optical-fibre channel
Device receives its distant place back-up protection of Acceleration of starting movement after back-up protection accelerates start command, and when being accelerated motion with a distant place
Limit its breaker of tripping.
It is main protection that transmission line of electricity, which configures optical fiber pilot protection, and the distant place back-up protection that optical-fibre channel accelerates is protected as standby
Shield；The operation time limit T1 adjusting of nearly back-up protection is 1 to 2 times of time limit differential △ t, when two movements are arranged in distant place back-up protection
Limit: a time limit Tb1It is adjusted by traditional ladder principle, two time limit Tb2It accelerates motion the time limit for an optical-fibre channel distant place, it is whole according to demand
It is set to 2 to 3 times of △ t of definite-time.
When receiving distant place back-up protection acceleration start command, can be accelerated motion time limit T with a distant place for distant place back-up protectionb2It opens
Move remote back-up protection movement；And if can be adjusted when accelerating start command without distant place back-up protection with pressing traditional ladder principle
Operation time limit Tb1Start remote back-up protection movement.
After transmission line of electricity main protection starting operation, trip signal is acted to breaker sending immediately, breaker loses if judging
Clever tripping then issues distant place back-up protection to adjacent power line protective devices and accelerates start command, which passes through adjacent lines
Road protection optical-fibre channel is sent to the route opposite side protective device, which adds receiving distant place back-up protection
After fast start command, starting distant place back-up protection accelerated motion tripping cuts off failure.
A kind of transmission line of electricity optical-fibre channel of the present invention accelerates distant place back-up protection method, after greatly accelerating a route distant place
The movement speed of standby protection, shortens fault clearing time, can avoid short trouble and makes to system and equipment safety stable operation
Cheng Geng great baneful influence.
A kind of transmission line of electricity optical-fibre channel of the present invention accelerates distant place back-up protection method, accelerates the movement of distant place back-up protection
Time limit can make the protective device maximum actuation time limit of transmission line short-circuit fault, when acting from the several seconds adjusted by ladder principle
Between be reduced to 1 second or so, failure can be cut off with shorter definite-time when failure tripping occurs in the breaker of main protection,
Short trouble is reduced to damage caused by system and equipment safety stable operation.
Detailed description of the invention
Present invention will be further explained below with reference to the attached drawings and examples:
Fig. 1 is route protection speed-up command Info Link schematic diagram.
Fig. 2 is that route protection sends distant place back-up protection acceleration start command schematic diagram.
Fig. 3 is line backup protection distant place accelerated motion schematic diagram.
Specific embodiment
A kind of transmission line of electricity optical-fibre channel of the present invention accelerates distant place back-up protection method, when the distant place back-up protection acts
Between can independently adjust, the time limit is shorter, and avoids according to traditional ladder principle setting value order and actuation time is too long.
The relay protection of transmission line allocation plan being related to are as follows: longitudinal differential protection is jumped as main protection, without time limit movement
Lock, the back-up protection that configuration can be accelerated by optical-fibre channel, deferred action tripping, wherein the action delay of nearly standby is T1, can
Adjusting is the cooperation time limit grade difference that 1 to 2 times of △ t, △ t is the electric system, and value range is 0.2~0.7 second；Distant place standby
There are two operation time limit, when normal operation, the distant place back-up protection that optical-fibre channel accelerates is pressed after traditional ladder principle adjusts one
Standby protection act time limit Tb1, this is a time limit, and the circuit element that a time limit is connected by electric system increases step by step, the line of system side
This operation time limit value of circuit component distant place back-up protection is larger, it is difficult to meet system and quickly cut off failure, guarantee system and equipment
The requirement of safety and stability；Therefore, according to the solution of the present invention, a distant place for the distant place back-up protection of optical-fibre channel acceleration is set
Accelerate motion time limit Tb2, this was two time limits, this time limit independently adjusts, do not need to be cooperated by increased mode step by step, but want
The reliable actuation time for being greater than local main protection and nearly standby is asked, can be adjusted as 2 to 3 times of △ t.
Longitudinal differential protection is the most general main protection of transmission line of electricity, and the protective device at route both ends is connected by optical-fibre channel
It is connected together, realizes the mutual transmitting of protective device electric measurement information and guarded command, the longitudinal differential protection at route both ends
Device may be implemented the completely quick protection without dead zone, cut off rapidly after the electric measurement information that route both ends are comprehensively compared
Line-internal short trouble, guaranteeing will not malfunction in external short trouble.Longitudinal differential protection applies ten in the power system
Divide universal.
Traditional ladder principle adjusts the generic principles cooperated between the back-up protection operation time limit for referring to transmission line of electricity, load
The back-up protection operation time limit at end is most short, and the back-up protection operation time limit of upper level route is more dynamic than the back-up protection of next stage circuit
Big minimum of one cooperation time limit differential △ t, the setting value order method that this back-up protection operation time limit increases step by step are wanted as the time limit
It is exactly ladder principle.Ladder principle is the generic principles of back-up protection operation time limit adjusting.
When short trouble occurs for this line-internal, the main protection starting of this line configuring is stood after main protection starting operation
Trip signal is issued to this line-breaker, after issuing trip signal, if in the given time, protective device still detects
It is not removed to transmission line malfunction and the fault current that exists, then determines the failure tripping of this line-breaker, this route is protected
Protection unit sends distant place standby to the protective device of adjacent lines immediately and protects while starting the movement of its breaker fail protection
Shield accelerates start command, and distant place back-up protection is accelerated to start by the protective device of adjacent lines after receiving acceleration start command
Order, the line protective devices of the transmission line of electricity opposite side is transmitted to by optical-fibre channel, the protective device of the transmission line of electricity opposite side
After receiving distant place back-up protection and accelerating start command, judge through relay protective scheme, its distant place back-up protection of Acceleration of starting, with a distant place
Accelerate motion time limit Tb2Trip signal is issued, its breaker of tripping cuts off failure, realizes the Accelerated trip function of distant place back-up protection
Can, if not receiving distant place back-up protection accelerates start command, the time limit T acted with distant place back-up protectionb1Issue tripping
Order, its breaker of tripping.
With standby time limit T1The nearly back-up protection for acting tripping is the standing back-up protection of route protection, in every deuterzooid line
While the main protection starting operation of road, the nearly back-up protection also starting operation, and press nearly standby time limit T1It issues and jumps to breaker
Lock order, when receiving distant place back-up protection acceleration start command, with distant place accelerated motion time limit Tb2, i.e. two time limits, acceleration is dynamic
The failure for making excision next stage circuit, for the route close to system power supply side, which is more much smaller than a time limit one
The operation time limit of a fixation, it is highly beneficial to guarantee system safety and stability.
Usually important transmission line of electricity both ends are equipped with longitudinal differential protection device, and the longitudinal differential protection device at both ends is logical
It crosses optical fiber to link together, transmits electric measurement information between each other and guarded command, the protective device of route one end claim another
The protective device at end is the protective device of opposite side.
Specific embodiment:
1), in the application example of Fig. 1, under normal circumstances, when 2 short circuit occurred inside failure of route, as K point occurs
Short circuit, the starting of 2 protective device 3 of route, main protection starting and snap action, send trip signal and give circuit breaker Q F3, breaker
QF3 tripping, failure removal are simultaneously eliminated, and fault current disappears, and protective device restores normal operating condition.
If 2), protective device 3 is after main protection issues trip signal, flowed through in still detectable route in the given time
Electric current reach the setting valve for having electric current criterion, can determine whether occur breaker failure tripping, protective device 3 issue start failure protection
While guarded command, distant place back-up protection is issued to adjacent upper level line protective devices 2 and accelerates start command, protection dress
It sets 2 and back-up protection acceleration start command in a distant place is issued to the protective device 1 of route opposite side by optical-fibre channel immediately；Because of route 2
Failure be reverse direction failure for protective device 2, fault power direction is opposite direction, which accelerates
Start command not will lead to the back-up protection accelerated motion of protective device 2；The failure of route 2 is just for protective device 1
Direction failure, fault power direction is positive direction, and is the failure in protection scope, and protective device 1 reaches entry condition
Starting rapidly, and a time limit T is acted according to back-up protectionb1It goes to prepare back-up protection movement trip breaker QF1, in protective device
1 when accelerating start command from distant place back-up protection that the protective device 2 that optical-fibre channel receives opposite side is sent, while judging power side
To for positive direction, protective device 1 starts a distant place and accelerates motion two time limit Tb2, acceleration protection device 1 acts the trip time, with shorter
Time limit act and trip and cut off QF1, complete the acceleration starting tripping of distant place back-up protection, and cut off short trouble, keep electricity
The safe and stable operation of Force system.
Claims (4)
1. a kind of transmission line of electricity optical-fibre channel accelerates distant place back-up protection method, it is characterised in that: short circuit occurs for this line-internal
When failure, after the main protection starting operation of this route while issuing trip signal to breaker, main protection open circuit is being judged
When device failure tripping, main protection sends distant place back-up protection to adjacent lines protective device and accelerates start command, and adjacent lines is protected
Distant place back-up protection is accelerated start command by protection unit, is transferred to the route opposite side protective device, the line by optical-fibre channel
After road opposite side protective device receives back-up protection acceleration start command, its distant place back-up protection of Acceleration of starting movement, and with a distant place
Accelerate motion its breaker of time limit tripping.
2. a kind of transmission line of electricity optical-fibre channel accelerates distant place back-up protection method according to claim 1, it is characterised in that: defeated
It is main protection that electric line, which configures optical fiber pilot protection, and the distant place back-up protection that optical-fibre channel accelerates is as back-up protection；Nearly standby
The operation time limit T1 adjusting of protection is 1 to 2 times of time limit differential △ t, and two operation time limits: a time limit T are arranged in distant place back-up protectionb1
It is adjusted by traditional ladder principle, two time limit Tb2It accelerates motion the time limit for an optical-fibre channel distant place, adjusting is definite-time 2 according to demand
To 3 times of △ t.
3. a kind of transmission line of electricity optical-fibre channel accelerates distant place back-up protection method according to claim 1, it is characterised in that: remote
When receiving distant place back-up protection acceleration start command, can be accelerated motion time limit T with a distant place for square back-up protectionb2Start remote standby to protect
Shield movement；And if when accelerating start command without distant place back-up protection, meeting is by the operation time limit of traditional ladder principle adjusting
Tb1Start remote back-up protection movement.
4. a kind of transmission line of electricity optical-fibre channel accelerates distant place back-up protection method according to claim 1, it is characterised in that: defeated
After electric line main protection starting operation, trip signal is acted to breaker sending immediately, if judging breaker failure tripping, to
Adjacent power line protective devices issue distant place back-up protection and accelerate start command, which protects optical fiber logical by adjacent lines
Road is sent to the route opposite side protective device, which is receiving distant place back-up protection acceleration start command
Afterwards, starting distant place back-up protection accelerated motion tripping, cuts off failure.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810918517.7A CN108963994B (en) | 2018-08-13 | 2018-08-13 | Accelerated remote backup protection method for optical fiber channel of power transmission line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810918517.7A CN108963994B (en) | 2018-08-13 | 2018-08-13 | Accelerated remote backup protection method for optical fiber channel of power transmission line |
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| CN108963994A true CN108963994A (en) | 2018-12-07 |
| CN108963994B CN108963994B (en) | 2020-05-26 |
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| CN201810918517.7A Active CN108963994B (en) | 2018-08-13 | 2018-08-13 | Accelerated remote backup protection method for optical fiber channel of power transmission line |
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Cited By (4)
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| CN109888750A (en) * | 2019-03-25 | 2019-06-14 | 国电南瑞科技股份有限公司 | A kind of shortening site failure protection time delay of action method and system |
| WO2020177320A1 (en) * | 2019-03-05 | 2020-09-10 | 金诗瑶 | Remote differential protection device |
| CN111682509A (en) * | 2020-04-17 | 2020-09-18 | 许继集团有限公司 | Power transmission line protection system and protection configuration method |
| CN114006358A (en) * | 2021-10-29 | 2022-02-01 | 广东电网有限责任公司 | Non-power-off transmission motion detection method, device and equipment for remotely-controlled intelligent wave recorder |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
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| CN114006358A (en) * | 2021-10-29 | 2022-02-01 | 广东电网有限责任公司 | Non-power-off transmission motion detection method, device and equipment for remotely-controlled intelligent wave recorder |
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