CN108767825A - A kind of feeder automation intelligent on the spot is delayed differential fitting method and application entirely - Google Patents
A kind of feeder automation intelligent on the spot is delayed differential fitting method and application entirely Download PDFInfo
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- CN108767825A CN108767825A CN201810630171.0A CN201810630171A CN108767825A CN 108767825 A CN108767825 A CN 108767825A CN 201810630171 A CN201810630171 A CN 201810630171A CN 108767825 A CN108767825 A CN 108767825A
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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
- H02H7/28—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 meshed systems
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
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Abstract
It is delayed entirely differential fitting method and application the present invention relates to a kind of feeder automation intelligent on the spot; relay protection " being isolated on the spot " and the advantage of feeder automation " self- recoverage " are combined; preferentially it is isolated on the spot by relay protection in line failure, maximizes and reduce scope of power outage；If transforming plant protecting time delays nargin is big; full delay Graded coordination is then formed with line feed terminals to ensure protective seletion; i.e. any point failure is not had a power failure by this grade of protective separation, non-faulting region, and feeder automation function self- recoverage is relied on when transient fault occurs.
Description
Technical field
The present invention relates to wiring fault maintenance field more particularly to a kind of feeder automation intelligent on the spot be delayed entirely it is differential
Fitting method and pattern application.
Background technology
Feeder automation is to utilize automation equipment or system, monitors the operation conditions of power distribution network, finds power distribution network in time
Failure carries out the power supply of fault location, isolation and recovery to non-faulting region.In recent years, for different types of power supply area,
Intelligent power distribution network construction uses differentiation principle, feeder automation to realize that concentrated and on the spot pattern formula can be used in troubleshooting.
Type feeder automation does not depend on communication on the spot, and troubleshooting is completed by equipment autoprotection or time cooperation.Traditional coincidence
Device formula feeder automation is divided into voltage-time type, voltage and current time type isotype, and switching cooperation substation with line load goes out
Line breaker.
Independent of main website and communication, reliable in action, processing are rapid for the realization of automatic circuit formula feeder automation, adapt to compared with
For rugged environment.Voltage-time type is the most commonly seen formula feeder automation pattern of automatic circuit on the spot, passes through switch " no pressure point
The working characteristics cooperation substation outlet switch of lock, incoming call time-delay closing " is secondary to close a floodgate to realize, primary combined floodgate isolated fault area
Between, secondary combined floodgate restores the power supply of non-faulting section.According to different application demands, electric current is increased on the basis of voltage-time type
Assistant criteria forms the forking models such as voltage and current time type and Adaptive synthesis type.
At this stage, many B, C class power supply areas in China, which are promoted, tries out type feeder automation on the spot, but is met in extension process
To bottleneck, main cause is that current rack of distribution is difficult to the impact for bearing repeatedly to overlap.
Power distribution network is multi-point and wide-ranging, running environment is complicated and Frequent Troubles, how fast after short trouble occurs for distribution line
Speed positioning, isolated fault, it is the target to be realized of feeder automation to restore non-faulting block supply.And the automatic circuit promoted at present
There are following technical problems for formula feeder automation：
(1) it will all cause substation's outlet switch to trip after distribution line any point is broken down, that is, cause primary complete
Line has a power failure, and expands power failure area, reduces power supply reliability；
(2) when distribution line permanent fault, substation's outlet switch, which must complete secondary coincidence, can just restore electricity, i.e., non-event
Barrier region can experience to have a power failure in short-term twice；
(3) if when nearly leading-out terminal breaks down, short circuit current is larger, it is secondary overlap to transforming plant primary equipment impact compared with
Greatly, it reduces the service life.
Invention content
The purpose of the invention is to overcome the deficiencies in the prior art, obtains a kind of feeder automation intelligent on the spot and prolong entirely
When Graded coordination method, relay protection " on the spot be isolated " and the advantage of feeder automation " self- recoverage " are combined, in circuit
Preferentially it is isolated on the spot by relay protection when breaking down, maximizes and reduce scope of power outage.If transforming plant protecting time delays are abundant
Degree is big, then full delay Graded coordination is formed with line feed terminals to ensure that protective seletion, i.e. any point failure are protected by this grade
Isolation, non-faulting region do not have a power failure, and feeder automation function self- recoverage is relied on when transient fault occurs.
The present invention is achieved through the following technical solutions：
A kind of feeder automation intelligent on the spot is delayed differential fitting method entirely, includes the following steps：
1-1) when fault current definite value and time delays definite value meet protection certification condition, uniquely presented by fault point upstream
Line terminal is isolated on the spot；
1-2) meet after having ballast conjunction condition, the multiple action after the X times；
1-3) then restore electricity if transient fault waiting failure next time, then separating brake and is latched again if permanent fault
Under gate-dividing state；
Handling result 1-4) is uploaded into main website by radio communication after the completion of failure treatment in situ, further studies and judges faulty section
Section simultaneously sends a warning message.
Further, it specifically comprises the following steps when in use：
It, will be preferential due to upstream feed-line terminal protection actuation time minimum 2-1) when circuit any point is broken down
Isolated fault section；
The X times 2-2) are introduced into after feed-line terminal protection separating brake, meets if there is ballast to close condition, is switched after the X times primary
Multiple action；
2-3) enter the fault detect Y times after the X times, the non-separating brake of switch thinks successful reclosing in the Y times, and failure is not at this
Grade, switch separating brake thinks reclosing failure in the Y times, and failure is in this grade；
If 2-4) reclosing failure, line feed terminals locking restores electricity in gate-dividing state if successful reclosing；
Wherein, the X times are the time of coincidence when having calendering, and acquiescence 5s can be adjusted；The Y times are failure detection time, give tacit consent to 3s
It can adjust；Feed-line terminal protection actuation time is overcurrent protection actuation time, is adjusted according to station default value.
Further, it is protection separating brake to have ballast to close condition, and higher level has pressure, reclosing to throw, and X has pressure in the time.
Further, operating time of protection is more than 300ms in standing, and feed-line terminal protection actuation time is less than 100ms.
Further, on the spot intelligent feeder automation be delayed entirely differential fitting method select one or two times height fusion feedback
Line terminal equipment, operating time of protection are made of three parts, respectively：Fault determining time, relay are outputed the time and are consolidated
There is opening time；Wherein fault determining time is of different sizes in 10ms-20ms according to fault current, and relay outputs the time and is
10ms, intrinsic opening time are 25-30ms.
A kind of feeder automation intelligent on the spot is delayed the application of differential fitting method entirely, which is characterized in that is become with 10kV
It is specific as follows for power station：
10kV substations outlet switch exits instantaneous fast tripping protection, delay fast tripping protection definite value 1550A 400ms, overcurrent
Protection definite value is 390A 1000ms, is adjusted by the differential fitting method that is delayed entirely of intelligent feeder automation on the spot, to line
Road backbone, branch line simulate permanent short failure, instantaneous short-circuit failure respectively, and intelligent fault treating procedure is such as on the spot
Under：
S1, permanent short failure, fault current 1325A, the separate AB phases of failure occur between backbone FD2-FD3；It is main
II section of protection definite value of main line FD1 switches and FD2 switches is respectively 1250A, 1000A, meets current start condition and starts timing, becomes
CX switches III sections of protection definite values in power station are 390A, meet current start condition and start timing:
After S1-A, 100ms, FD2 switch protection separating brake isolated faults, II section of FD1 switches protection at this time and transformer substation switch
III sections of protections return；
S1-B, FD2 switch higher level have electricity, satisfaction to have ballast conjunction entry condition to enter X time timing, and reclosing is dynamic after 5s
Make, since failure is after FD2, failure is detected in the Y times, reclosing is in failure and is latched under gate-dividing state；
Instantaneous short-circuit failure, fault current 437A, the separate BC phases of failure occur for S2, FZ2 branch line；Branch line FZ2 switches, master
III sections of protection definite values of main line FD1, FD2 switch and substation CX switches are respectively 120A, 250A, 340A, 390A, meet electric current
Entry condition starts timing:
After S2-A, 200ms, FZ2 switchs isolated fault on the spot, at this time backbone FD1, FD2 switches and substation CX switches
III sections of protections return；
S2-B, FZ2 switch higher level have an electricity, and satisfaction has ballast to close entry condition to enter X time timing, reclosing after 5s, by
It is that failure is not detected in the transient fault Y times in failure, successful reclosing restores electricity.
Compared with prior art, the present invention has following usefulness：
1) intelligent on the spot to be delayed entirely under differential protection cooperation pattern, any failure is isolated by this grade, and non-faulting region is not
Have a power failure, maximize and reduce power failure area, improves power supply reliability；
2) delay Graded coordination is formed with substation, is maximized and is reduced substation and bypass the immediate leadership tripping, change can be all replaced per level-one
Power station carries out Fault Isolation and coincidence；
3) single shot reclosing is only configured, avoids repeatedly overlapping the impact for bringing a rack, while by once overlapping
Restore transient fault.
4) higher level protection as this grade protect back-up protection, if this grade of shielding failure, back-up protection can still complete every
From failure and self- recoverage.
Description of the drawings
Fig. 1 is the differential cooperation schematic diagram of delay entirely of the embodiment of the present invention；
Fig. 2 is the feeder automation processing flow schematic diagram intelligent on the spot of the embodiment of the present invention；
Fig. 3 is that the differential protection cooperation sequential logic diagram that is delayed entirely intelligent on the spot of the embodiment of the present invention is intended to；
Fig. 4 is that the protection separating brake of the embodiment of the present invention is selectively isolated failure schematic diagram；
Fig. 5 is the unsuccessful reclosing of the embodiment of the present invention and is latched in schematic diagram under gate-dividing state；
Fig. 6 is that the FZ2 of the embodiment of the present invention switchs isolated fault schematic diagram on the spot；
Reference numeral is as follows：
CX, outlet switch, FD1, No. 1 block switch, FD2, No. 2 block switches, FD3, No. 3 block switches, FZ1, No. 1 point
Zhi Kaiguan, FZ2, No. 2 branch switches.
Specific implementation mode
In order to make the purpose , technical scheme and advantage of the present invention be clearer, with reference to the accompanying drawings and embodiments, right
The present invention is further elaborated.It should be appreciated that the specific embodiments described herein are merely illustrative of the present invention, and
It is not used in the restriction present invention.
The intelligent feeder automation differential fitting method requirement distribution line all fronts intelligent terminal that is delayed entirely is all made of on the spot
Breaker has three-stage overcurrent protection function and has pressure time-delay closing, reclosing in failure locking, delay automatic unlocking work(
Can, it is provided simultaneously with earth fault judgement and defencive function.
It is come into force due to being delayed differential fitting method entirely when substation's delay nargin is larger, is suitable for delay quick-break and protects
The cooperation of shield or overcurrent protection.When protection for feed line forms full delay Graded coordination with protection in station, outlet chopped-off head in slave station
Delay Graded coordination will be formed step by step to feeder line final stage：
1) per level-one line feed terminals delay Graded coordination is respectively formed with higher level；
2) failure is isolated on the spot by this grade, and non-faulting region does not have a power failure；
3) primary overlap completes transient fault self- recoverage；
Intelligent feeder automation process flow is as shown in Figure 2 on the spot：
1) when fault current definite value and time delays definite value meet protection certification condition, by the unique feeder line in fault point upstream
Terminal is isolated on the spot；
2) since this grade of isolation does not cause higher level to trip, satisfaction (protects separating brake, higher level to have pressure, weight after having ballast conjunction condition
Close a floodgate and throw, X has pressure in the time), the multiple action after the X times；
3) then restore electricity waiting failure next time if transient fault, if permanent fault then again separating brake and be latched in
Under gate-dividing state；
4) handling result is uploaded into main website by radio communication after the completion of failure treatment in situ, further studies and judges fault section
And it sends a warning message.
The intelligent feeder automation Graded coordination that is delayed entirely needs to adjust three kinds of times respectively on the spot：
1. the line feed terminals X times：Time of coincidence when having calendering, acquiescence 5s can be adjusted；
2. the line feed terminals Y times：Failure detection time, acquiescence 3s can be adjusted；
3. feed-line terminal protection actuation time：Overcurrent protection actuation time adjusts according to station default value.
Intelligent feeder automation is delayed differential matching timing principle as shown in figure 3, short circuit event occurs in circuit entirely on the spot
When barrier, since the feed-line terminal protection actuation time of fault point upstream is minimum, it will be selectively isolated failure, do not cause higher level to jump
Lock, while relying on feeder automation functional rehabilitation transient fault.
The intelligent feeder automation differential matching timing principle that is delayed entirely is as follows on the spot：
It 1), will be excellent due to upstream feed-line terminal protection actuation time minimum when short trouble occurs for circuit any point
First isolated fault section；
2) the X times are introduced into after feed-line terminal protection separating brake, meet if there is ballast to close condition, primary weight is switched after the X times
Conjunction acts；
3) enter the fault detect Y times after the X times, the non-separating brake of switch thinks successful reclosing in the Y times, and failure is not at this
Grade, switch separating brake thinks reclosing failure in the Y times, and failure is in this grade；
If 4) reclosing failure, line feed terminals locking restores electricity in gate-dividing state if successful reclosing.
The intelligent feeder automation differential fitting method necessary condition that is delayed entirely is on the spot：
1) operating time of protection is more than 300ms in standing；
Full delay Graded coordination requires have regular hour delay nargin in station, and level of signification is formed with feed-line terminal protection
Difference.
2) feed-line terminal protection actuation time is less than 100ms.
Realize that full delay Graded coordination is more demanding to feed-line terminal protection actuation time, it is desirable that operating time of protection is long-term
It is stably held within 100ms, if operating time of protection fails to meet the requirements, the full Graded coordination that is delayed expands partial failure
It has a power failure on a large scale area.
On the spot intelligent feeder automation be delayed entirely differential fitting method select one or two times height fusion line feed terminals set
Standby, operating time of protection is made of three parts, respectively：Fault determining time, when relay outputs time and intrinsic separating brake
Between.Wherein fault determining time is of different sizes in 10ms-20ms according to fault current, and relay outputs the time for 10ms, inherently
Opening time is 25-30ms, therefore realizes that the feed-line terminal protection actuation time of full delay Graded coordination is 45-60ms, is met
Full delay Graded coordination requirement.
An application as the method for the present invention：
Certain 10kV substations outlet switch exits instantaneous fast tripping protection, delay fast tripping protection definite value 1550A 400ms it is (primary
Value), overcurrent protection definite value is 390A 1000ms (sub-value), is delayed entirely differential match by intelligent feeder automation on the spot
Conjunction method is adjusted, and is coordinated by method in 3.1,3.2.After protection fixed value adjusting being carried out to line feed terminals, the 10kV lines
Road realizes that intelligent feeder automation on the spot is delayed differential operational mode entirely, and protection fixed value adjusting is as shown in table 1.
1 10kV of table intelligent differential relaying configuration tables that are delayed entirely on the spot
Permanent short failure, instantaneous short-circuit failure are simulated respectively to circuit backbone, branch line, on the spot intelligent failure
Processing procedure is as follows：
(1) permanent short failure
Permanent short failure, fault current 1325A, the separate AB phases of failure occur such as between backbone FD2-FD3.Trunk
II section of protection definite value of line FD1 switches and FD2 switches is respectively 1250A, 1000A, meets current start condition and starts timing, power transformation
III sections of protection definite values of CX switches of standing are 390A, meet current start condition and start timing.
A：After 100ms, FD2 switch protection separating brake isolated faults are as shown in figure 4, II section of protection of FD1 switches at this time and power transformation
III sections of protections of switch of standing return；
B：FD2 switch higher levels have electricity, satisfaction to have ballast conjunction entry condition to enter X time timing, and reclosing acts after 5s, by
In failure after FD2, failure is detected in the Y times, reclosing is in failure and is latched under gate-dividing state as shown in Figure 5.
(2) instantaneous short-circuit failure
Instantaneous short-circuit failure, fault current 437A, the separate BC phases of failure such as occurs in FZ2 branch lines.Branch line FZ2 switches,
III sections of protection definite values of backbone FD1, FD2 switch and substation CX switches are respectively 120A, 250A, 340A, 390A, meet electricity
Stream entry condition starts timing.
A：After 200ms, FZ2 switch on the spot isolated fault as shown in fig. 6, at this time backbone FD1, FD2 switch and substation
The III sections of protections of CX switches return；
B：FZ2 switch higher levels have an electricity, and satisfaction has ballast to close entry condition to enter X time timing, reclosing after 5s, due to therefore
Barrier is that failure is not detected in the transient fault Y times, and successful reclosing restores electricity.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all essences in the present invention
All any modification, equivalent and improvement etc., should all be included in the protection scope of the present invention made by within refreshing and principle.
Claims (6)
- The differential fitting method 1. a kind of feeder automation intelligent on the spot is delayed entirely, which is characterized in that include the following steps：It is whole by the unique feeder line in fault point upstream 1-1) when fault current definite value and time delays definite value meet protection certification condition End is isolated on the spot；1-2) meet after having ballast conjunction condition, the multiple action after the X times；1-3) then restore electricity if transient fault waiting failure next time, if permanent fault then again separating brake and be latched in point Under lock state；Handling result 1-4) is uploaded into main website by radio communication after the completion of failure treatment in situ, further studies and judges fault section simultaneously It sends a warning message.
- The differential fitting method 2. a kind of feeder automation intelligent on the spot as described in claim 1 is delayed entirely, which is characterized in that Specifically comprise the following steps：2-1) when circuit any point is broken down, due to upstream feed-line terminal protection actuation time minimum, by preferential isolation Fault section；The X times 2-2) are introduced into after feed-line terminal protection separating brake, meets if there is ballast to close condition, primary overlap is switched after the X times Action；2-3) enter the fault detect Y times after the X times, the non-separating brake of switch thinks successful reclosing in the Y times, and failure is not in this grade, Y Switch separating brake thinks reclosing failure in time, and failure is in this grade；If 2-4) reclosing failure, line feed terminals locking restores electricity in gate-dividing state if successful reclosing；Wherein, X is the time of coincidence when having calendering, and acquiescence 5s can be adjusted；Y is failure detection time, and acquiescence 3s can be adjusted；Feeder line is whole End operating time of protection is overcurrent protection actuation time, is adjusted according to station default value.
- The differential fitting method 3. a kind of feeder automation intelligent on the spot as claimed in claim 1 or 2 is delayed entirely, feature exist In described to have ballast to close condition as protection separating brake, higher level has pressure, reclosing to throw, and X has pressure in the time.
- The differential fitting method 4. a kind of feeder automation intelligent on the spot as claimed in claim 2 is delayed entirely, which is characterized in that Operating time of protection is more than 300ms in standing, and feed-line terminal protection actuation time is less than 100ms.
- The differential fitting method 5. a kind of feeder automation intelligent on the spot as claimed in claim 4 is delayed entirely, which is characterized in that On the spot intelligent feeder automation be delayed entirely differential fitting method select one or two times height fusion Feeder Terminal Units, protection Actuation time is made of three parts, respectively：Fault determining time, relay output time and intrinsic opening time；Wherein event Barrier judges that the time is of different sizes in 10ms-20ms according to fault current, and relay outputs the time as 10ms, and intrinsic opening time is 25-30ms。
- The application of differential fitting method 6. a kind of feeder automation intelligent on the spot is delayed entirely, which is characterized in that become for 10kV Power station outlet switch exits instantaneous fast tripping protection, specific as follows：10kV substations outlet switch exits instantaneous fast tripping protection, delay fast tripping protection definite value 1550A 400ms, overcurrent protection Definite value is 390A 1000ms, is adjusted by the differential fitting method that is delayed entirely of intelligent feeder automation on the spot, to circuit master Main line, branch line simulate permanent short failure, instantaneous short-circuit failure respectively, and intelligent fault treating procedure is as follows on the spot：S1, permanent short failure, fault current 1325A, the separate AB phases of failure occur between backbone FD2-FD3；Backbone FD1 is switched and II section of protection definite value of FD2 switches is respectively 1250A, 1000A, is met current start condition and is started timing, substation III sections of protection definite values of CX switches are 390A, meet current start condition and start timing:After S1-A, 100ms, FD2 switch protection separating brake isolated faults, III sections of II section of FD1 switches protection at this time and transformer substation switch Protection returns；S1-B, FD2 switch higher level have electricity, satisfaction to have ballast conjunction entry condition to enter X time timing, and reclosing acts after 5s, by In failure after FD2, failure is detected in the Y times, reclosing is in failure and is latched under gate-dividing state；Instantaneous short-circuit failure, fault current 437A, the separate BC phases of failure occur for S2, FZ2 branch line；Branch line FZ2 switches, backbone FD1, FD2 are switched and III sections of protection definite values of substation CX switches are respectively 120A, 250A, 340A, 390A, meet current start Condition starts timing:After S2-A, 200ms, FZ2 switchs isolated fault on the spot, at this time III sections of backbone FD1, FD2 switches and substation CX switches Protection returns；S2-B, FZ2 switch higher level have an electricity, and satisfaction has ballast to close entry condition to enter X time timing, reclosing after 5s, due to therefore Barrier is that failure is not detected in the transient fault Y times, and successful reclosing restores electricity.
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN109560544A (en) * | 2018-12-03 | 2019-04-02 | 国网新疆电力有限公司阿克苏供电公司 | A kind of power distribution network self-healing method and application based on relay protection and Intelligent reclosing |
| CN110556796A (en) * | 2019-08-08 | 2019-12-10 | 西安兴汇电力科技有限公司 | Distribution network short-circuit fault processing method based on feeder automation device |
| CN111884177A (en) * | 2020-07-03 | 2020-11-03 | 国网浙江省电力有限公司电力科学研究院 | In-situ feeder automation method based on voltage and current protection |
| CN113258545A (en) * | 2021-04-14 | 2021-08-13 | 珠海许继电气有限公司 | In-situ feeder automation method and system based on multi-stage time step difference protection |
| CN114157034A (en) * | 2021-12-08 | 2022-03-08 | 国网四川省电力公司电力科学研究院 | Comprehensive monitoring method for multidimensional state of distribution automation terminal |
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| 刘健等: ""继电保护配合提高配电自动化故障处理性能"", 《电力系统保护与控制》 * |
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| CN109560544A (en) * | 2018-12-03 | 2019-04-02 | 国网新疆电力有限公司阿克苏供电公司 | A kind of power distribution network self-healing method and application based on relay protection and Intelligent reclosing |
| CN110556796A (en) * | 2019-08-08 | 2019-12-10 | 西安兴汇电力科技有限公司 | Distribution network short-circuit fault processing method based on feeder automation device |
| CN111884177A (en) * | 2020-07-03 | 2020-11-03 | 国网浙江省电力有限公司电力科学研究院 | In-situ feeder automation method based on voltage and current protection |
| CN111884177B (en) * | 2020-07-03 | 2022-10-14 | 国网浙江省电力有限公司电力科学研究院 | In-situ feeder automation method based on voltage and current protection |
| CN113258545A (en) * | 2021-04-14 | 2021-08-13 | 珠海许继电气有限公司 | In-situ feeder automation method and system based on multi-stage time step difference protection |
| CN114157034A (en) * | 2021-12-08 | 2022-03-08 | 国网四川省电力公司电力科学研究院 | Comprehensive monitoring method for multidimensional state of distribution automation terminal |
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Application publication date: 20181106 |