CN104917160B - A kind of distributed feed line automatization system permissive type fault handling method based on FTU - Google Patents
A kind of distributed feed line automatization system permissive type fault handling method based on FTU Download PDFInfo
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- CN104917160B CN104917160B CN201510206653.XA CN201510206653A CN104917160B CN 104917160 B CN104917160 B CN 104917160B CN 201510206653 A CN201510206653 A CN 201510206653A CN 104917160 B CN104917160 B CN 104917160B
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- 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
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
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- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/20—Systems supporting electrical power generation, transmission or distribution using protection elements, arrangements or systems
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- 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
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
Abstract
The present invention a kind of distributed feed line automatization system permissive type fault handling method based on FTU is disclosed, it is adaptable to need open/close inscription of loop, containing many power supplys, multiple-limb, many breakers feeder network.The system is made up of the feeder terminal unit (FTU) and communication network that are connected on all breakers of each feeder line.Methods described allows signal by being sent between adjacent end, carries out fault location and isolation.When network topology or the method for operation change, the configuration that the system need to only change local end is continued to run with.Work as communicating interrupt, by way of communication of magnifying, realize the fault location and isolation of extension.Therefore it is this to improve the reliability of feeder automation protection using the feeder automation method that permission information is sent between adjacent FTU, and relative to existing distributed feeder automation scheme, performance is more excellent.
Description
Technical field
The distributed feedback based on FTU (Feeder Terminal Unit, feeder terminal unit) the invention discloses one kind
Line automation system permissive type fault handling method, belongs to the technical field of power network feeder automation.
Background technology
Existing feeder automation scheme has two kinds, it is a kind of be by way of centralization, but this mode is depended on
Communication and Centralized Controller, easily can not be rapidly performed by fault location isolation, and work as centralized Control because of communication obstruction
Device failure, the then feeder automation of whole region will move out.Another kind is distributed, and this mode is by the adjacent open circuit of differentiation
The failure amount information of device, realizes fault location, but currently existing scheme only just for simple topological structure, when many power supplys are closed
During inscription of loop, then cannot accurate fault location, when many power supply open loop operations, it is necessary to change multiple FTU information, reduce therefore
Hinder the efficiency for the treatment of.
To the deficiency of existing feeder automation scheme based on more than, the present inventor is carried out to distributed feed line automatization system
Further investigation, and by test of many times, thus this case produces.
The content of the invention
The technical problems to be solved by the invention are directed to the deficiency of above-mentioned background technology, there is provided a kind of based on FTU's
Distributed feed line automatization system permissive type fault handling method.
The present invention is adopted the following technical scheme that for achieving the above object：
Distributed feed line automatization system is made up of the FTU and communication network that are connected on each breaker of feeder line.Each FTU can be with
Electric quantity information at detection correspondence breaker, it is possible to send tripping operation/combined floodgate telecommand, control open circuit to correspondence breaker
Device break-make.Each adjacent FTU is communicated by communication network, according to the distributed feeder line that signal transacting failure is allowed using FTU
Automatic mode, realizes fault location and isolation.Suitable for the feeder automation reality containing many power supply conjunction/open loop operation power distribution networks
It is existing.And when topology or the method for operation change, the configuration that the system need to only change local end is continued to run with, and expansibility is strong.
Work as communicating interrupt, by way of extension, realize the fault location and isolation of extension.
A kind of distributed feed line automatization system permissive type fault handling method based on FTU, in all open circuits of each feeder line
Feeder terminal unit FTU and communication network are set on device；Characterized in that, methods described comprises the following steps：
(1) upstream-downstream relationship, the upstream and downstream FTU for determining each feeder terminal unit FTU according to configuration strategy be communicatively
Location, determines that each feeder terminal unit FTU detects the positive direction of correspondence circuit breaker current, determines the failure electricity of correspondence breaker
Stream gets over limit value and extension stand-by period, wherein, it is the time definite value of extension isolation setting that the extension stand-by period is；
(2) when certain feeder terminal unit FTU detect correspondence breaker fault current more than the fault current it is out-of-limit
Value but fault current threshold crossing time setting the extension stand-by period in when：
If fault current is positive direction, signal is allowed to adjacent downstream FTU hairs according to elementary tactics；If fault current
It is opposite direction, then allows signal to adjacent upstream FTU hairs according to elementary tactics；
When the fault current that certain feeder terminal unit FTU detects correspondence breaker is out-of-limit more than set fault current
Value, and fault current threshold crossing time exceed setting the extension stand-by period when：
If fault current is positive direction, being sent to the adjacent downstream FTU of adjacent downstream FTU according to extension strategy allows
Signal；If fault current is opposite direction, being sent to the adjacent upstream FTU of adjacent upstream FTU according to extension strategy allows letter
Number；
Wherein, set each feeder terminal unit FTU detect correspondence circuit breaker current positive direction for upstream sensing under
Trip；Described to allow the flag bit that signal is unified setting, flag bit containing upstream and downstream flag bit, downstream sending allows signal
I.e. by communication, downstream FTU sends the control instruction of upstream mark position 1, is sent upstream by allowing signal i.e. by communicating upstream
FTU sends downstream mark position 1；When any FTU receives the control instruction of upstream mark position 1 that all adjacent upstream FTU send
Afterwards, by upstream mark position 1；After any FTU receives 1 control instruction of downstream mark position that all adjacent downstream FTU send,
By downstream mark position 1；
(3) FTU receives permission signal, according to tripping operation strategy, tripping operation telecommand is sent to corresponding breaker.
The present invention still further comprises following preferred scheme：
In step (1), the configuration strategy is：In distributed feed line automatization system, any one power supply is chosen
It is starting point, finds the breaker of adjacent installing FTU as other direction away from the direction of power supply using feeder line, marks the breaker to be
Upstream head breakers, continue to find the breaker of next adjacent installing FTU along feeder line other direction, and it is upper to mark the breaker
The downstream circuit breaker of one breaker, a upper breaker is the upstream circuit breaker of the breaker, is inquired about along the other direction successively
The breaker of each adjacent installing FTU simultaneously marks its upstream-downstream relationship；
When multi-branch node is run into along the other direction, mark first breaker on each branch line all for node it
The downstream circuit breaker of a upper breaker of preceding feeder line；For on the first breaker of any branch line, the node other branch lines
A upper breaker of feeder line is the upstream circuit breaker of the breaker before first breaker and node；
Each branch line determines to continue to be found to the other direction of branch line after first breaker, marks upstream and downstream breaker to close
System；
According to the upstream-downstream relationship of each breaker, the upstream-downstream relationship of the FTU of the corresponding breaker of mark, and according to FTU
Upstream-downstream relationship configure FTU address.
In step (2), the elementary tactics refers to, when certain feeder terminal unit FTU detects the event of correspondence breaker
Barrier electric current more than the fault current get over limit value but fault current threshold crossing time setting the extension stand-by period in when, if
The fault current of feeder terminal unit FTU detections is positive direction, then the FTU sends to adjacent downstream FTU and allows signal；Such as
Really the fault current of feeder terminal unit FTU detections is opposite direction, then the FTU sends to adjacent upstream FTU and allows signal.
The extension strategy refers to when the fault current that certain feeder terminal unit FTU detects correspondence breaker is more than institute
When the fault current of setting gets over limit value, and fault current threshold crossing time more than the extension stand-by period for setting：
If the fault current of feeder terminal unit FTU detections is positive direction, to the adjacent downstream of adjacent downstream FTU
FTU sends allows signal；If the fault current of feeder terminal unit FTU detections is opposite direction, to its adjacent upstream FTU
Adjacent upstream FTU send allow signal.
It is capable of the failure of process circuit end for methods described, the downstream flag bit of the border FTU without downstream is set forever
It is long placed in 1, the upstream flag bit that the border FTU without upstream is upstream head FTU is set and is forever put.
In step (3), the tripping operation strategy refers to that any FTU meets following either condition, then act on its correspondence open circuit
Device trips：
(1) fault current of FTU detections detection is positive direction, and flag bit has put 1 downstream；(2) FTU detections inspection
The fault current of survey is opposite direction, and trip flag bit has put 1 thereon.
When distributed feed line automatization system increases by one group of breaker and corresponding FTU, adjacent FTU upstream and downstream only need to be changed
The configuration of relation, when increased breaker is border breaker, if border breaker is upstream head breakers, by the open circuit
The corresponding FTU upstreams flag bit of device forever puts 1；If border breaker is the border breaker without downstream, by the breaker
Corresponding FTU downstreams flag bit forever put 1；
When the distributed feed line automatization system method of operation changes, i.e., any certain breaker is opened as network interconnecting circuit,
Then hair permission signal is kept to adjacent upstream and all FTU in downstream；The network interconnecting circuit is breaker separated in circuit.
By the above-mentioned distributed feed line automatization system permissive type fault handling method based on FTU, it is possible to achieve with
Lower beneficial effect：
(1) the invention belongs to distributed feeder automation scheme, it is to avoid the communication obstruction being likely to occur under centralized system
Caused troubleshooting not in time with centralized Control failure caused by the problem that exits of feeder automation.The equity control of all terminals
System, the distributed failure that can be realized fast, accurately is positioned and isolated, and reliability, quick-action, sensitivity and selectivity are very
By force.
(2) present invention considers the problem of network topology and changes of operating modes.When there is above-mentioned change, change is only needed
The configuration of local end, you can so that system is continued to run with.Therefore the expansion and reliability of system are improve.
(3) present invention considers the problem of local communicating interrupt, it is proposed that the strategy of extension.When there is communicating interrupt,
Each FTU gets over one-level and sends permission signal.Enable failure magnify one-level isolate, improve the reliability of system.
(4) present invention is applied to the realization of multiple power supply cyclizations or open loop operation feeder network feeder automation.It is a kind of
The brand-new feeder automation implementation suitable for Complicated Distribution Network network.With engineering application value very high.
Brief description of the drawings
Fig. 1 is distributed feed line automatization system figure；
Fig. 2 is the flow chart of the distributed feeder automation method that the present invention allows information processing failure using FTU；
Fig. 3 is the embodiment of the present invention 1；
Fig. 4 is the embodiment of the present invention 2；
Fig. 5 is network topology or allows mode variable processing method figure；
Fig. 6 is extension processing method figure under communication failure.
Specific embodiment
Below in conjunction with the accompanying drawings, operation principle of the invention is described in detail.As shown in figure 1, in feeder network
There are eight breakers of S1~S8, S1~S6 hands in hand connected, and S1 is connected on bus B1, and S6 is connected on bus B3, between S4 and S5
There is another branch line, be connected to S6 and S7, S7 in branch line end, be connected on bus B2, connect respectively on tri- buses of B1~B3
There are 1~power supply of power supply, 3 three power supplys.Distributed feed line automatization system includes the FTU1~FTU8 and the company that are connected on S1~S8
Connect the communication network of FTU1~FTU8.Each FTU monitors corresponding breaker respectively, detects the electric quantity information of circuit breaker position
(including voltage, electric current, breaking tolerance), sends the break-make of jump/combined floodgate remote control breaker.Each FTU can be by communication network
Network realizes the communication between any stream oriented device.Each FTU equities control, i.e., all internal processes are identical, and allowed according to using FTU
The feeder automation method of information processing failure, carries out different configurations, including the setting of electric current positive direction, circuit breakers position letter
Breath.Continued to run with when network topology or changes of operating modes need to only change the local configuration of system, work as communicating interrupt, by expanding
Change the mode of communication, realize the fault location and isolation of extension.
According to the distributed feed line automatization system permissive type fault handling method based on FTU, as shown in Fig. 2 including with
Lower step：
Step 1：
The address of the upstream-downstream relationship of each feeder terminal unit FTU, upstream and downstream FTU is determined according to configuration strategy,
Determine that each feeder terminal unit FTU detects the positive direction of correspondence circuit breaker current, determines the fault current of correspondence breaker
More limit value and extension the stand-by period, the extension stand-by period be extension isolation setting time definite value；
The configuration strategy is：In distributed feed line automatization system, any one power supply is chosen for starting point, with feeder line
The breaker of adjacent installing FTU is found as other direction away from the direction of power supply, it is upstream head breakers to mark the breaker,
Continue to be found along feeder line other direction the breaker of next adjacent installing FTU, under marking the breaker to be a upper breaker
Trip breaker, a upper breaker is the upstream circuit breaker of the breaker, inquires about each adjacent installing along the other direction successively
The breaker of FTU simultaneously marks its upstream-downstream relationship；
When multi-branch node is run into along the other direction, mark first breaker on each branch line all for node it
The downstream circuit breaker of a upper breaker of preceding feeder line；For on the first breaker of any branch line, the node other branch lines
A upper breaker of feeder line is the upstream circuit breaker of the breaker before first breaker and node；
Each branch line determines to continue to be found to the other direction of branch line after first breaker, marks upstream and downstream breaker to close
System；
According to the upstream-downstream relationship of each breaker, the upstream-downstream relationship of the FTU of the corresponding breaker of mark, and according to FTU
Upstream-downstream relationship configure FTU address.
Step 2：
The fault current of correspondence breaker is detected more than the fault current more limit value as certain feeder terminal unit FTU but
When fault current threshold crossing time is within the extension stand-by period of setting, sent to the adjacent FTU of fault down stream according to elementary tactics
Signal is allowed, the permission signal is the flag bit of unified setting, flag bit containing upstream and downstream flag bit, downstream sends and permits
Perhaps signal is that downstream FTU sends the control instruction of upstream mark position 1 by communication, is sent upstream by allowing signal i.e. by logical
Downstream FTU sends the control instruction of downstream mark position 1 to news；When certain feeder terminal unit FTU detects the event of correspondence breaker
Barrier electric current gets over limit value more than set fault current, and fault current threshold crossing time exceedes the extension stand-by period of setting,
Being sent to the adjacent FTU of the adjacent FTU of fault down stream according to extension strategy allows signal；When any FTU receive it is all it is adjacent on
After the control instruction of upstream mark position 1 that trip FTU sends, by upstream mark position 1；When any FTU receives all adjacent downstreams
After the control instruction of downstream mark position 1 that FTU sends, by downstream mark position 1；
Elementary tactics refers to, when certain feeder terminal unit FTU detects the fault current of correspondence breaker more than the event
Barrier electric current get over limit value but fault current threshold crossing time setting the extension stand-by period in when, if the feeder terminal unit
The fault current of FTU detections is positive direction, then the FTU sends to adjacent downstream FTU and allows signal, if the line feed terminals are filled
The fault current for putting FTU detections is opposite direction, then the FTU sends to adjacent upstream FTU and allows signal.Wherein, each feedback is set
Line terminal installation FTU detects the positive direction of correspondence circuit breaker current for downstream is pointed in upstream.
The extension strategy refers to when the fault current that certain feeder terminal unit FTU detects correspondence breaker is more than institute
When the fault current of setting gets over limit value, and fault current threshold crossing time more than the extension stand-by period for setting：If the feeder line
The fault current of terminal installation FTU detections is positive direction, then being sent to the adjacent downstream FTU of adjacent downstream FTU allows signal；Such as
Really the fault current of feeder terminal unit FTU detections is opposite direction, then sent to the adjacent upstream FTU of its adjacent upstream FTU
Allow signal.
It is capable of the failure of process circuit end for methods described, it is permanent that the border FTU downstreams flag bit without downstream is set
1 is put, the border FTU upstreams flag bit without upstream is set and is forever put 1.
Step 3：
FTU receives permission signal, according to tripping operation strategy, tripping operation telecommand is sent to corresponding breaker.The jump
Lock strategy refers to that any FTU meets following either condition, then act on its correspondence circuit breaker trip：
(1) fault current of FTU detections detection is positive direction, and flag bit has put 1 downstream；(2) FTU detections inspection
The fault current of survey is opposite direction, and trip flag bit has put 1 thereon.
With reference to accompanying drawing 1, the configuration of its three steps is as follows：
Step 1：
The address of the upstream-downstream relationship of each feeder terminal unit FTU, upstream and downstream FTU is determined according to configuration strategy,
Determine that each feeder terminal unit FTU detects the positive direction of correspondence circuit breaker current, determines the fault current of correspondence breaker
More limit value and extension the stand-by period, the extension stand-by period be extension isolation setting time definite value；
According to configuration strategy, selection power supply 1 is starting point, finds adjacent as other direction away from the direction of power supply using feeder line
The breaker of FTU is installed, it is the upstream head affiliated breakers of breaker, i.e. FTU1 to mark the breaker；Continue along feeder line the opposing party
To the breaker for finding next adjacent installing FTU, the i.e. affiliated breakers of FTU2, the affiliated breakers of flag F TU2 are belonging to FTU1
The downstream circuit breaker of breaker, the affiliated breakers of FTU1 are the upstream circuit breaker of the affiliated breakers of FTU2, successively along described another
The breaker of each adjacent installing FTU of direction query simultaneously marks its upstream-downstream relationship；
When multi-branch node is run into along the other direction, mark first breaker on each branch line all for node it
The downstream circuit breaker of a upper breaker of preceding feeder line；For on the first breaker of any branch line, the node other branch lines
A upper breaker of feeder line is the upstream circuit breaker of the breaker before first breaker and node；
Each branch line determines to continue to be found to the other direction of branch line after first breaker, marks upstream and downstream breaker to close
System；
According to the upstream-downstream relationship of each breaker, the upstream-downstream relationship of the FTU of the corresponding breaker of mark, and according to FTU
Upstream-downstream relationship configure FTU address.
Have according to configuration：Without FTU, downstream FTU is FTU2 for FTU1 upstreams in Fig. 1；FTU2 upstreams FTU is FTU1, downstream
FTU is FTU3；FTU3 upstreams FTU is FTU2, and downstream FTU is FTU4；FTU4 upstreams FTU be FTU3, downstream FTU be FTU5 and
FTU7；FTU5 upstreams FTU is FTU4 and FTU7, and downstream FTU is FTU6；FTU6 upstreams FTU is FTU5, and downstream is without FTU；On FTU7
Trip FTU is FTU4 and FTU5, and downstream FTU is FTU8；FTU1 upstreams FTU is FTU7, and downstream is without FTU.
By taking FTU2 as an example, positive direction is FTU1 and points to FTU3.
Step 2：
The fault current of correspondence breaker is detected more than the fault current more limit value as certain feeder terminal unit FTU but
When fault current threshold crossing time is within the extension stand-by period of setting, sent to the adjacent FTU of fault down stream according to elementary tactics
Signal is allowed, the permission signal is the flag bit of unified setting, flag bit containing upstream and downstream flag bit, downstream sends and permits
Perhaps signal is that downstream FTU sends the control instruction of upstream mark position 1 by communication, is sent upstream by allowing signal i.e. by logical
Downstream FTU sends the control instruction of downstream mark position 1 to news；When certain feeder terminal unit FTU detects the event of correspondence breaker
Barrier electric current gets over limit value more than set fault current, and fault current threshold crossing time exceedes the extension stand-by period of setting,
Being sent to the adjacent FTU of the adjacent FTU of fault down stream according to extension strategy allows signal；When any FTU receive it is all it is adjacent on
After the control instruction of upstream mark position 1 that trip FTU sends, by upstream mark position 1；When any FTU receives all adjacent downstreams
After the control instruction of downstream mark position 1 that FTU sends, by downstream mark position 1；
Elementary tactics refers to, when certain feeder terminal unit FTU detects the fault current of correspondence breaker more than the event
Barrier electric current get over limit value but fault current threshold crossing time setting the extension stand-by period in when, if the feeder terminal unit
The fault current of FTU detections is positive direction, then the FTU sends to adjacent downstream FTU and allows signal, if the line feed terminals are filled
The fault current for putting FTU detections is opposite direction, then the FTU sends to adjacent upstream FTU and allows signal.Wherein, each feedback is set
Line terminal installation FTU detects the positive direction of correspondence circuit breaker current for downstream is pointed in upstream.
The extension strategy refers to when the fault current that certain feeder terminal unit FTU detects correspondence breaker is more than institute
When the fault current of setting gets over limit value, and fault current threshold crossing time more than the extension stand-by period for setting：If the feeder line
The fault current of terminal installation FTU detections is positive direction, then being sent to the adjacent downstream FTU of adjacent downstream FTU allows signal；Such as
Really the fault current of feeder terminal unit FTU detections is opposite direction, then sent to the adjacent upstream FTU of its adjacent upstream FTU
Allow signal.
It is capable of the failure of process circuit end for methods described, FTU1 downstreams flag bit is set and forever puts 1, FTU6 is set
Forever 1 is put with FTU8 upstreams flag bit.
Step 3：FTU receives permission signal or allows substitution signal, according to tripping operation strategy, is sent out to corresponding breaker
Send tripping operation telecommand.
Tripping operation strategy refers to that any FTU meets following either condition, then act on its correspondence circuit breaker trip：
(1) fault current of FTU detections detection is positive direction, and flag bit has put 1 downstream；(2) FTU detections inspection
The fault current of survey is opposite direction, and trip flag bit has put 1 thereon.
By above-mentioned implementation, being accurately positioned and isolating for failure can be realized.
The distributed feed line automatization system permissive types of 3 and 4 inventive embodiments 1,2 pairs based on FTU below in conjunction with the accompanying drawings
Fault handling method is described in detail as follows：
As shown in figure 3, i.e. on the basis of such as Fig. 1 at the K between S3 and S4 generation three-phase ground failure, then FTU1~
FTU3 detects positive excessively stream, and FTU4~FTU8 detects reverse overcurrent.So FTU1~FTU3 is to the adjacent all FTU in downstream
Sending allows signal, and FTU4~FTU8 sends to the adjacent all FTU in upstream and allows signal.Receiving upstream allows signal
FTU is FTU1~FTU5, wherein FTU4 and FTU5 reverse overcurrents, but FTU5 does not receive the block signal of all upstream FTU, because
This only FTU4 sends tripping operation remote control makes S4 trip.It is FTU3~FTU8 to receive downstream and allow the FTU of signal.Wherein FTU3 is just
To excessively stream, therefore only FTU3 sends tripping operation remote control and S3 is tripped.So as to realize the isolation to failure K.
As shown in figure 4, i.e. on the basis of such as Fig. 1 at the K between S4 and S5 generation three-phase ground failure, then FTU1~
FTU4 detects positive excessively stream, and FTU5~FTU8 detects reverse overcurrent.So FTU1~FTU4 is to the adjacent all FTU in downstream
Sending allows signal, and FTU5~FTU8 sends to the adjacent all FTU in upstream and allows signal.Receiving upstream allows signal
FTU is FTU1~FTU5 and FTU7, and wherein FTU5 and FTU7 reverse overcurrents, therefore only FTU5 and FTU7 send tripping operation remote control to be made
S5 and S7 trips.It is FTU4~FTU8 to receive downstream and allow the FTU of signal.Wherein FTU4 forward direction excessively streams, therefore only FTU4
Sending tripping operation remote control makes S4 trip.So as to realize the isolation to failure K.
Work as communicating interrupt, by way of communication of magnifying, realize the fault location and isolation of extension.
Processing method figure is magnified under 6 communication failure below in conjunction with the accompanying drawings to the distributed feeder automation based on FTU
Extension processing method in system permissive type fault handling method is described in detail as follows：
As shown in fig. 6, i.e. on the basis of Fig. 4, FTU3 leads to not disconnect S3, S4 with FTU4 communicating interrupts, realizes
Isolation to failure K.Then each FTU still experiences excessively stream after the stand-by period of magnifying, then more one-level sends and allows signal.
Now, that receive upstream permission signal is FTU1, FTU3~FTU8, wherein FTU4~FTU8 reverse overcurrents, but S6 and S8 are not
The permission signal of all FTU in upstream is received, therefore only FTU4, FTU5 and FTU7 transmission tripping operation remote control makes S4, S5 and S7 trip.
That receive downstream permission signal is FTU2~FTU4, FTU6 and FTU8, wherein FTU1~FTU3 forward direction excessively streams, therefore only FTU2
Sending tripping operation remote control with FTU3 makes S2 and S3 trip.So as to realize the extension isolation to failure K.
Continued to run with when network topology or changes of operating modes need to only change the local configuration of system, it is characterised in that：
When one group of breaker and FTU is increased in network, need to only change the configuration of adjacent FTU upstream-downstream relationships, when increased
Breaker and FTU are border breaker, if the FTU upstreams flag bit is forever put 1 by border breaker upstream without FTU；Such as
The FTU downstreams flag bit is forever then put 1 without FTU in fruit border breaker downstream.The border breaker is near power supply
The FTU of FTU or line end.When the method for operation changes, i.e., any certain breaker is opened as network interconnecting circuit, then on adjacent
Trip and all FTU in downstream keep hair permission signal.The network interconnecting circuit is breaker separated in circuit.
As shown in figure 5, increasing S9 and the FTU9 being attached thereto in the upstream of S5 i.e. on the basis of such as Fig. 1.According to scheme
The configuration of FTU4, FTU5, FTU7 and FTU9 need to only be changed, will FTU4 to change into upstream FTU be FTU3, downstream FTU is
FTU7 and FTU9；FTU5 is changed into upstream FTU for FTU9, downstream FTU is FTU6；FTU7 is changed into upstream FTU for FTU4
And FTU9, downstream FTU are FTU8；FTU9 is configured to upstream FTU for FTU4 and FTU7, downstream FTU is FTU5.
As shown in figure 5, S3 disconnects turns into network interconnecting circuit.According to scheme, the FTU4 in FTU3 FTU2 upstream and downstream
Keeping hair simultaneously allows signal.Distributed feed line automatization system can continue to reality after failure can be realized by way of such as Fig. 5
Existing accurate fault location and isolation.
Therefore, by the above-mentioned distributed feed line automatization system permissive type fault handling method based on FTU realize according to
Distributed feeder automation under by adjacent communication modes.This programme can be applicable to open/close inscription of loop, containing electricity more
Source, multiple-limb, the feeder network of many breakers, and when network topology or the method for operation change, system can also be matched somebody with somebody by local
The change put ensures that system is continued to run with.When communicating interrupt can also realize the isolation of failure by way of extension, it is ensured that
The reliability of system.
Above example is only used for help and understands core concept of the invention, it is impossible to the present invention is limited with this, for ability
The technical staff in domain, every according to thought of the invention, any change done in specific embodiments and applications,
Should be included within protection scope of the present invention.
Claims (5)
1. a kind of distributed feed line automatization system permissive type fault handling method based on FTU, in all breakers of each feeder line
It is upper that feeder terminal unit FTU and communication network are set；Characterized in that, methods described comprises the following steps：
(1) address of the upstream-downstream relationship of each feeder terminal unit FTU, upstream and downstream FTU is determined according to configuration strategy, really
Fixed each feeder terminal unit FTU detects the positive direction of correspondence circuit breaker current, determines that the fault current of correspondence breaker is got over
Limit value and extension stand-by period, wherein, it is the time definite value of extension isolation setting that the extension stand-by period is；
(2) when certain feeder terminal unit FTU detects the fault current of correspondence breaker more than the fault current more limit value but
When fault current threshold crossing time is within the extension stand-by period of setting：
If fault current is positive direction, signal is allowed to all adjacent downstream FTU hairs according to elementary tactics；If fault current
It is opposite direction, then allows signal to all adjacent upstream FTU hairs according to elementary tactics；
When certain feeder terminal unit FTU detects the fault current of correspondence breaker more than set fault current more limit value,
And fault current threshold crossing time exceed setting the extension stand-by period when：
If fault current is positive direction, being sent to the adjacent downstream FTU of adjacent downstream FTU according to extension strategy allows letter
Number；If fault current is opposite direction, being sent to the adjacent upstream FTU of adjacent upstream FTU according to extension strategy allows signal；
Wherein, setting each feeder terminal unit FTU detects the positive direction of correspondence circuit breaker current as downstream is pointed in upstream；Institute
The flag bit for allowing signal to be unified setting, flag bit containing upstream and downstream flag bit are stated, it is to lead to downstream to send and allow signal
Downstream FTU sends the control instruction of upstream mark position 1 to cross communication, and being sent upstream by permission signal i.e. will upstream by communication
FTU sends the control instruction of downstream mark position 1；When any FTU receives the upstream mark position 1 that all adjacent upstream FTU send
After control instruction, by upstream mark position 1；When the downstream mark position 1 that any FTU receives all adjacent downstream FTU transmissions is controlled
After system instruction, by downstream mark position 1；
(3) FTU receives permission signal, according to the tripping operation strategy of setting, tripping operation telecommand is sent to corresponding breaker.
2. permissive type fault handling method according to claim 1, it is characterised in that：
In step (1), the configuration strategy is：In distributed feed line automatization system, choosing any one power supply is
Point, the breaker of adjacent installing FTU is found using feeder line away from the direction of power supply as other direction, and it is upstream to mark the breaker
First breaker, continues to find the breaker of next adjacent installing FTU along feeder line other direction, marks the breaker to break for upper one
The downstream circuit breaker of road device, a upper breaker is the upstream circuit breaker of the breaker, inquires about each along the other direction successively
The breaker of adjacent installing FTU simultaneously marks its upstream-downstream relationship；
When multi-branch node is run into along the other direction, it is all the feedforward of node to mark the first breaker on each branch line
The downstream circuit breaker of a upper breaker of line；For on the first breaker of any branch line, the head of the node other branch lines breaks
A upper breaker of feeder line is the upstream circuit breaker of the breaker before road device and node；
Each branch line determines to continue to be found to the other direction of branch line after first breaker, marks upstream and downstream breaker relation；
According to the upstream-downstream relationship of each breaker, the upstream-downstream relationship of the FTU of the corresponding breaker of mark, and according to the upper of FTU
Downstream relationship configures the address of FTU.
3. permissive type fault handling method according to claim 1, it is characterised in that：
In step (2), the elementary tactics refers to, when certain feeder terminal unit FTU detects the failure electricity of correspondence breaker
Stream more than the fault current get over limit value but fault current threshold crossing time setting the extension stand-by period in when, if the feedback
The fault current of line terminal installation FTU detections is positive direction, then the FTU sends to adjacent downstream FTU and allows signal, if should
The fault current of feeder terminal unit FTU detections is opposite direction, then the FTU sends to adjacent upstream FTU and allows signal；
The extension strategy refers to when certain feeder terminal unit FTU detects the fault current of correspondence breaker more than set
Fault current get over limit value, and fault current threshold crossing time is when exceeding the extension stand-by period of setting：
If the fault current of feeder terminal unit FTU detections is positive direction, to the adjacent downstream FTU of adjacent downstream FTU
Sending allows signal；If the fault current of feeder terminal unit FTU detections is opposite direction, to its adjacent upstream FTU's
Adjacent upstream FTU sends allows signal；
In distributed feed line automatization system, in any case, permission signal is done to the FTU of end and head end and forever puts 1
Treatment, sets the border FTU downstreams flag bit without downstream and forever puts 1, sets the border FTU upstreams flag bit without upstream and forever puts
1。
4. the permissive type fault handling method according to claim 1 or 3, it is characterised in that：
In step (3), the tripping operation strategy refers to that any FTU meets following either condition, then act on its correspondence breaker and jump
Lock：
(1) fault current of FTU detections detection is positive direction, and flag bit has put 1 downstream；(2) FTU detections are detected
Fault current is opposite direction, and trip flag bit has put 1 thereon.
5. permissive type fault handling method according to claim 1, it is characterised in that：
When distributed feed line automatization system increases by one group of breaker and corresponding FTU, adjacent FTU upstream-downstream relationships only need to be changed
Configuration；
When increased breaker is border breaker, if border breaker is upstream head breakers, by breaker correspondence
FTU upstreams flag bit forever put 1；If border breaker is the border breaker without downstream, by the correspondence of the breaker
FTU downstreams flag bit forever puts 1；
When the distributed feed line automatization system method of operation changes, i.e., any certain breaker is opened as network interconnecting circuit, then to
Adjacent upstream and all FTU in downstream keep hair permission signal；The network interconnecting circuit is breaker separated in circuit.
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| CN105576828A (en) * | 2015-12-11 | 2016-05-11 | 国家电网公司 | Novel distribution network distributed fault monitoring system |
| CN105896490B (en) * | 2016-05-17 | 2018-08-21 | 上海思源弘瑞自动化有限公司 | A kind of fault handling method and device of power distribution network |
| CN109995003B (en) * | 2019-04-22 | 2021-03-16 | 北京天能继保电力科技有限公司 | Intelligent distributed feeder automation method based on state quantity |
| CN110146779B (en) * | 2019-04-24 | 2021-06-08 | 国网江苏省电力有限公司电力科学研究院 | Flexible power distribution network fault area accurate positioning method based on terminal and distribution transformer alarm |
| CN111193246B (en) * | 2020-01-16 | 2023-07-14 | 贵州电网有限责任公司 | Fault removal method considering operation mode and switching characteristics |
| CN111651845B (en) * | 2020-05-28 | 2023-09-29 | 广东电网有限责任公司 | Power distribution network fault positioning method and device, electronic equipment and storage medium |
| CN113030642B (en) * | 2021-03-03 | 2021-11-16 | 北京天能继保电力科技有限公司 | Automatic field test method and system for feeder automation |
| CN113872162A (en) * | 2021-09-26 | 2021-12-31 | 武汉市速隔迅联电力科技有限公司 | Intelligent distributed and self-adaptive field action type smooth conversion method |
| CN116488116B (en) * | 2023-03-06 | 2023-12-05 | 国网四川省电力公司技能培训中心 | 5G-based power distribution network feeder line fault collaborative isolation method, system and storage medium |
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