CN107069676A - Power distribution network fault positioning and rapid isolation recovery control method - Google Patents
Power distribution network fault positioning and rapid isolation recovery control method Download PDFInfo
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- CN107069676A CN107069676A CN201611132163.0A CN201611132163A CN107069676A CN 107069676 A CN107069676 A CN 107069676A CN 201611132163 A CN201611132163 A CN 201611132163A CN 107069676 A CN107069676 A CN 107069676A
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- 238000002955 isolation Methods 0.000 title claims abstract description 63
- 238000000034 method Methods 0.000 title claims abstract description 44
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- 230000015556 catabolic process Effects 0.000 claims description 31
- 230000005611 electricity Effects 0.000 claims description 25
- 238000004891 communication Methods 0.000 claims description 16
- 238000013024 troubleshooting Methods 0.000 claims description 13
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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
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/086—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution networks, i.e. with interconnected conductors
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/088—Aspects of digital computing
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- H02J13/0006—
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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
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
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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
-
- 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
-
- 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
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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
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/242—Home appliances
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- Engineering & Computer Science (AREA)
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- Theoretical Computer Science (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The invention provides a power distribution network fault positioning and rapid isolation recovery control method, which comprises the following steps: the line protection constant value of the outgoing line of the transformer substation is changed according to different line protection constant values, and the distributed FA function is triggered after protection action; after sending and mutually transmitting fault overcurrent indications on the DTU device, the distributed logic carries out positioning processing on overcurrent signals and generates fault isolation commands according to fault positioning results, the DTU drives corresponding electric operating mechanisms to execute brake-separating operation according to the isolation commands and waits for a position-separating signal to confirm that the brake-separating is successful; after the isolation is successful, the distributed logic sends recovery commands to the upstream and downstream of the fault area, and after the command is received by the outlet DTU of the upstream transformer substation and the DTU of the downstream contact point, the corresponding electric operating mechanism is driven to execute the closing operation, and the closing signal is waited to confirm the successful closing. The invention aims to provide a fault positioning and rapid isolation recovery control method for a distribution grid aiming at the defects of the prior art, and effectively realizes the positioning and removal of faults.
Description
Technical field
The invention belongs to power domain, and in particular to a kind of distribution network failure positions and quickly isolated recovery control method.
Background technology
Power system includes generating, transmission of electricity, distribution and electricity consumption four processes.Wherein, power distribution network is used as power generation and confession
Last link answered region be directly facing user, power supply quality, power supply reliability that numerous residents experience etc. by with
Power network is embodied, therefore its status is extremely important.With the more complexity of urban power distribution network circuit, new energy access power distribution network
Demand is more prevalent, causes distribution topological structure to become increasingly complex, and the difficulty of control operation and accident treatment is also got over accordingly
Come bigger.
The content of the invention
The purpose of the present invention positions and quickly isolated there is provided a kind of distribution network failure aiming at the defect of prior art extensive
Multiple control method, effectively realizes the localized resection of failure.
Positioned the invention provides a kind of distribution network failure and quickly isolate recovery control method, it comprises the following steps
The first step, arranging one in each looped network node of power distribution network, to possess distributed power Single-ring network intelligent distributed
Distributed intelligent terminal the device DTU, each distributed intelligent terminal device DTU of feeder automation (FA) function adapt to it automatically
Place overhead transmission line or cable run network node location, are responsible for collecting the telecontrol information of its location monitoring unit collection.
Carried out mutually by fiber direct connection mode or EPON modes between second step, each distributed intelligent terminal device DTU
Communication, shares mutually adjacent distributions formula intelligent end device DTU telecontrol information, electric power Single-ring network intelligent distribution is realized jointly
Formula feeder automation function.
3rd step, when short trouble occurs for circuit, the intelligent distributed feeder line of electric power Single-ring network close to trouble point is automatic
Fault message can be collected into by changing DTU, and be transmitted to adjacent electric power Single-ring network intelligent distribution type feeder automation DTU；Each electric power
Single-ring network intelligent distribution type feeder automation DTU combines the information that collects, and from the intelligent distributed feeder line of electric power Single-ring network
The information that automation DTU left and right sides adjacent power Single-ring network intelligent distribution type feeder automation DTU are received carries out total score
Analysis, to determine oneself state and residing logical link, fault location is completed eventually through time cooperation.
4th step, each distributed intelligent terminal device DTU is according to the result of fault location, the journey of respective startup separator isolation
Sequence；First, each distributed intelligent terminal device DTU sends a command to the corresponding distributed intelligent terminal device DTU of faulty equipment,
Distributed intelligent terminal device DTU drives the behaviour mechanism of respective electric equipment to the corresponding open circuit in fault zone according to isolation order
Device or on-load switch perform sub-switching operation or reclosing operation is corresponding, and wait breaker or on-load switch position signalling to confirm to divide
Lock, is finally completed Fault Isolation.
5th step, after isolating successfully, in order to avoid forced outage scope is excessive, is tackled in transformer station's wire-outgoing breaker, non-
The distributed intelligent terminal device DTU of fault zone branch line restores electricity；Each distributed intelligent terminal device DTU is to faulty section
The breaker or on-load switch of the upstream and downstream in domain, which are sent, recovers order, the distributed intelligent terminal device of upstream substation exit
DTU and the distributed intelligent terminal device DTU of downstream contact point drive electric behaviour's machine of respective electric equipment after order is received
Structure performs closing operation, and waits conjunction position signal to confirm, the optimization for completing fault zone is recovered.
In above-mentioned technical proposal, in distribution network system by 2 transformer station's ring network power supplies, wherein B4 on-load switches are disconnection position
Put, when the circuit F1 points between Liang Ge switching stations break down：
Breakdown judge is carried out first：Load is opened in breaker G1 in transformer station's first, distributed intelligent terminal device DTU1
Close the Sudden Changing Rate that A1, on-load switch B1 detect fault current, false voltage, distributed intelligent terminal device DTU2 and circuit
Distributed intelligent terminal device DTU below is not detected to be passed through between failure, adjacent distributions formula intelligent end device DTU cabinets
Ethernet exchanging fault message, can position failure and occur between on-load switch B1 and on-load switch A2；
Then Fault Isolation is carried out：Because on-load switch B1 and A2 are unable to on-load tripping operation, therefore broken by transformer station's outlet
Road device G1 trippings, and electric power Single-ring network intelligent distribution type feeder automation FA, on-load switch B1, on-load switch A2 trippings again, most
Fault Isolation is realized eventually；
Fault recovery is carried out again：After Fault Isolation success, transformer station wire-outgoing breaker switch G1 closes a floodgate, non-faulting region point
On-load switch A1 and branch line in cloth intelligent end device DTU1 restore electricity；Get in touch with on-load switch B4 to close a floodgate, non-faulting area
On-load switch B2 and branch line restore electricity in domain distributed intelligent terminal device DTU3, distributed intelligent terminal device DTU2, whole
Individual troubleshooting is finished.
In above-mentioned technical proposal, in distribution network system by 2 transformer station's ring network power supplies, wherein B4 on-load switches are disconnection position
Put, when bus F2 points break down between switching station：
Breakdown judge is carried out first：Load is opened in breaker G1 in transformer station's first, distributed intelligent terminal device DTU1
Close A1, on-load switch B1, on-load switch A2 detects fault current, false voltage in distributed intelligent terminal device DTU2
Distributed intelligent terminal device DTU in Sudden Changing Rate, distributed intelligent terminal device DTU2 behind on-load switch B2 and circuit is equal
Do not detect and pass through Ethernet exchanging fault message between failure, adjacent distributed intelligent terminal device DTU, it can be determined that therefore
Barrier occurs between on-load switch A2 and on-load switch B2；
Then Fault Isolation is carried out：On-load switch A2 and B2 are unable to on-load tripping operation, therefore by transformer station's wire-outgoing breaker
G1 trippings, and tripping is former to isolate again by electric power Single-ring network intelligent distribution type feeder automation FA, on-load switch A2, on-load switch B2
Barrier；
Fault recovery is carried out again：After Fault Isolation success, transformer station wire-outgoing breaker G1 closes a floodgate, non-faulting area distribution formula
Intelligent end device DTU1 restores electricity；Interconnection switch B4 closes a floodgate, and non-faulting area distribution formula intelligent end device DTU3 recovers
Power supply, fault zone distributed intelligent terminal device DTU2 power failures are to be checked, and whole troubleshooting is finished.
In above-mentioned technical proposal, in distribution network system by 2 transformer station's ring network power supplies, wherein on-load switch B4 is disconnection position
Put, when switching station's branch line F3 points break down：
Breakdown judge is carried out first：It is on-load switch A1 in G1 in transformer station's first, distributed intelligent terminal device DTU1, negative
Lotus switchs on-load switch A2 in B1, distributed intelligent terminal device DTU2, and on-load switch C2 detects failure, distributed intelligence
Distributed intelligent terminal device DTU in terminal installation DTU2 behind on-load switch B2 and circuit does not detect failure, phase
Pass through Ethernet exchanging fault message between adjacent distributed intelligent terminal device DTU cabinets, it can be determined that failure occurs in on-load switch
C2 downstreams；
Then Fault Isolation is carried out：Because C2 is on-load switch, it is impossible to which on-load trips, therefore by transformer station's outlet open circuit
Device G1 trippings, and electric power Single-ring network intelligent distribution type feeder automation FA, C2 again tripping with isolated fault；
Fault recovery is carried out again：After Fault Isolation success, transformer station wire-outgoing breaker G1 closes a floodgate, non-faulting area distribution formula
The other fault-free branch lines of intelligent end device DTU1, distributed intelligent terminal device DTU2 restore electricity, and whole troubleshooting is complete
Finish.
In above-mentioned technical proposal, certain line switching is judged as after failure, because on-load switch can not disengagement failure electricity
Stream, substation exit breaker is initially switched off, then breakdown switch B1 trippings again；The adjacent distributed intelligent terminal device in downstream
The breakdown switch A2 tripping adjacent with breakdown switch B1 in DTU, completes the isolation failure line.
In above-mentioned technical proposal, for controlling the terminal FTU1 of substation exit breaker to receive from breakdown switch
After tripping operation request, meeting tripping substation exit breaker, and send intelligent distribution type feeder automation function on signal；When connecing
The isolation pass signal sent after breakdown switch tripping success is received, substation exit breaker is closed, recovers non-faulting region
Breaker G1 is to the power supply between on-load switch A1.
In above-mentioned technical proposal, interconnection switch terminal judges that switch is by the incoming supply path of adjacent two lateral terminal
Interconnection switch；When interconnection switch receives Fault Isolation pass signal, the judgement of load transfer can be carried out；Load lotus turns sentencing for confession
Disconnected foundation is：Compare maximum permissible load that interconnection switch both sides receive and failure occur before normality load, if maximum permit
Perhaps load is more than the normality load before failure occurs, then interconnection switch closes, otherwise does not conform to.
In above-mentioned technical proposal, terminal is after trip signal is sent, and breakdown switch without disjunction, is then recognized at the appointed time
Occurs tripping for the line switching；Overhead line distribution feeder automation FA using malfunctioning switch as configurable item, if overhead line
The soft pressing plate of failure built in distributed feeder automation FA is set to input, then the line switching of tripping can spread out of unsuccessful reason letter
Number, the adjacent side line way switch tripping of line switching of tripping is with isolated fault, and follow-up logic of recovering is normally carried out；If the soft pressing plate of failure
It is set to not put into, then the line switching outflow intelligent distribution type feeder automation function block signal of tripping, whole piece circuit
Circuit breaker lock, outlet breaker trip protection.
In above-mentioned technical proposal, if line switching does not receive jump order switch separating brake or does not receive conjunction order switch combined floodgate i.e.
For switch malfunction；If judging line switching malfunction, the distributed feeder automation FA of line switching outflow overhead line of malfunction
Block signal, the circuit breaker lock of whole piece circuit, outlet breaker keeps closing a floodgate.
In above-mentioned technical proposal, occurs communication abnormality using at following two kinds between overhead line distribution feeder automation FA
Reason mode：The region-wide region-wide logic blocking of logic blocking or abnormal area logic blocking refers to finding any terminal room generation
After communication abnormality, logic blocking signal can be sent to whole logic operation region, eliminate the possibility of automation misoperation；It is abnormal
Area logic locking refers to that after finding that communication abnormality occurs for any terminal room a locking uses the logical gate of the passage, when
When being broken down in communication abnormality region, expand area of isolation
Conventional feeder line broke down, no matter which kind of weather and when, be required for operator on duty to be on the scene in time, look into
Trouble point is looked for, and needs to report without delay scheduling, can just be restored electricity from personnel's coordination in different portions mouthful, by automatic makeup
Put, the remote operation of troubleshooting can be achieved, is automatically brought into operation, greatly reduces workload, reduces work and safeguard intensity.Patent
Distribution network failure is positioned and quickly isolated all many-sides such as technology realization, engineering application, the engineering test of recovery control technology
Furtherd investigate, to form the positioning of standard set distribution network failure and quickly isolate recovery control technology implementation method,
Make technique not only can be with the operation of efficient stable, can be so that standardization can be reached, the end produced so as not to same equipment manufacturer
End product is interconnected, interoperated, and promotes being widely applied for technique.By the research of this patent, promote power distribution network event
Barrier positioning and the development for quickly isolating recovery control technology, to improving power supply reliability, meet power supply A+ core spaces 99.999%
High reliability, have and its important meaning.
Brief description of the drawings
Fig. 1 is power distribution network schematic diagram of the present invention
Fig. 2 is system group network principle schematic diagram
Fig. 3 is principle schematic diagram of the present invention
Fig. 4 is that circuit F1 points between Liang Ge switching stations break down schematic diagram
Fig. 5 is that isolation recovers schematic diagram after circuit F1 points between Liang Ge switching stations break down
Fig. 6 is that bus F2 points break down schematic diagram between switching station
Fig. 7 is that isolation recovers schematic diagram after bus F2 points break down between switching station
Fig. 8 is that switching station's branch line F3 points break down schematic diagram
Fig. 9 is isolation recovery schematic diagram after switching station's branch line F3 point failures
Figure 10 is breakdown switch action logic figure
Figure 11 is outlet breaker action logic figure
Figure 12 is interconnection switch action logic figure
Figure 13 is rack exemplary topology diagram of electric distribution network overhead wire
Figure 14 is over-current signal schematic diagram when typical open loop Distribution Network Frame ceases to be busy breaks down
Figure 15 is isolation processes figure when typical open loop distribution overhead line breaks down
Figure 16 is recovery process figure when typical open loop distribution overhead line breaks down
Figure 17 is processing procedures of the terminal FTU1 after 2. position is broken down shown in grid structure figure and whole with adjacent side
Hold the information schematic diagram of interaction.
Figure 18 is action logic process schematics of the terminal RTU1 after 2. position is broken down shown in grid structure figure
Figure 19 is action logic process of terminal FTU2, FTU5 after 5. position is broken down shown in grid structure figure
Figure 20 is reclosing analysis logic chart
Embodiment
The present invention is described in further detail with specific embodiment below in conjunction with the accompanying drawings, is easy to that this hair is well understood
It is bright, but they do not constitute restriction to the present invention.
Intelligent distribution type feeder automation (FA) is in communication with each other by terminal, protection cooperation or time cooperation, in power distribution network
When breaking down, non-faulting block supply is recovered in isolated fault region, and reports processing procedure and result, that is, passes through collection pair
Terminal (DTU) information is answered, and peer-to-peer communications are realized with adjacent terminal device, the control for running intelligent distributed FA systems is patrolled
Volume, realize that fault location, isolation and non-faulting region restore electricity.
Each looped network node of the intelligent distributed FA systems in looped network has a DTU for possessing distributed FA functions
(distributed intelligent terminal) is responsible for collecting the information of local monitor unit collection, when short trouble occurs for circuit, utilizes collection
The fault message arrived, and FA functions are realized jointly with other adjacent DTU by way of peer-to-peer communications.In general, power transformation
Protection and distributed logic equipment in standing are separate configurations；Distributed logic equipment on circuit can with DTU monitoring units
, can also separate configurations to merge.Distributed logic equipment in the design merges with DTU monitoring units, the advantage of the pattern
It is that, by internal bus interactive information, resource and hardware are shared, can improve communication and the reliability of algorithm.
Typical Disposition is as shown in figure 1, the powering mode of a rack is the cable run, first, second hand in hand of open loop operation
For substation exit breaker, there is 4 power distribution stations in ring, system opened point for power distribution station 3 " minus 6 " switch, DTU intelligent terminals
Configuration is in each transformer station and power distribution station.
Intelligent distributed FA systems are using the ether web frame for supporting peer-to-peer communications.System group network principle is as shown in Fig. 2 draw
Divide distributed network autonomous region, every cable run belongs to an independent distributed autonomous region；Each node deployment one two
Composition self-healing optical fiber ring network in all exchange areas in layer switch, each autonomous region；Three-tier switch is disposed in transformer station, it is right
The Layer 2 switch of lower all outlets of access, to upper access SDH backbone networks.
As shown in figure 3, the invention provides a kind of positioning of distribution network failure and quickly isolating recovery control method, its feature
It is：It comprises the following steps：
The first step, the route protection definite value according to the outlet of looped network transformer station is different and changes, by triggering point after protection act
Cloth FA functions；
Second step, send on DTU devices and mutually passes after the instruction of failure excessively stream, over-current signal is determined by distributed logic
Position processing, generalized time is 2~3 seconds；
3rd step, distributed logic produces Fault Isolation order according to fault location result, and DTU drives according to isolation order
Corresponding electrically operated institution performs sub-switching operation, and waits point position signal to confirm separating brake success, and generalized time is 1~2 second+switching mechanism
Actuation time；
4th step, after isolating successfully, distributed logic is sent to the upstream and downstream of fault zone recovers order, upstream power transformation
Outlet DTU and downstream contact point DTU stand after order is received, drives corresponding electrically operated institution to perform closing operation, and wait conjunction
Position signal confirms closing success, and generalized time is 1~2 second+start mechanism action time.
As shown in Figure 4,5, (F1 failures), specific troubleshooting process when the line failure between Liang Ge switching stations
It is as follows：
Breakdown judge：A1, B1 are detected behind failure, DTU2 cabinets and circuit in G1 in transformer station's first, DTU1 cabinet
DTU cabinets are not detected by fiber direct connection mode or EPON mode exchange trouble information between failure, adjacent DTU cabinets, can be with
Failure judgement occurs between B1 and A2.
Fault Isolation：Because B1 and A2 are on-load switch, it is impossible to which on-load trips, therefore by transformer station's wire-outgoing breaker
Switch G1 trippings, and start FA, B1, A2 again tripping with isolated fault.
Fault recovery：After Fault Isolation success, transformer station wire-outgoing breaker switch G1 closes a floodgate, in the DTU1 cabinets of non-faulting region
A1 and branch line restore electricity；Interconnection switch B4 closes a floodgate, and B2 and branch line restore electricity in non-faulting region DTU3 cabinets, DTU2 cabinets,
Whole troubleshooting is finished.
As shown in Figure 6,7, when bus-bar fault between switching station (F2 failures), specific troubleshooting process is as follows：
Breakdown judge：A2 is detected in failure, DTU2 cabinets in A1, B1 in G1 in transformer station's first, DTU1 cabinet, DTU2 cabinets
DTU cabinets behind B2 and circuit are not detected to be exchanged between failure, adjacent DTU cabinets by fiber direct connection mode or EPON modes
Fault message, it can be determined that failure occurs between A2 and B2.
Fault Isolation：Because A2 and B2 are on-load switch, it is impossible to which on-load trips, therefore by transformer station's wire-outgoing breaker
Switch G1 trippings, and start FA, A2, B2 again tripping with isolated fault.
Fault recovery：After Fault Isolation success, transformer station wire-outgoing breaker switch G1 closes a floodgate, and non-faulting region DTU1 cabinets are extensive
Multiple power supply；Interconnection switch B4 is closed a floodgate, and non-faulting region DTU3 cabinets are restored electricity, and whole troubleshooting is finished.
As shown in Figure 8,9, when switching station's fault of branch line (F3 failures), specific troubleshooting process is as follows：
Breakdown judge：A2 in A1, B1 in G1 in transformer station's first, DTU1 cabinet, DTU2 cabinets, C2 detect failure, DTU2
DTU cabinets in cabinet behind B2 and circuit are not detected passes through fiber direct connection mode or EPON modes between failure, adjacent DTU cabinets
Exchange trouble information, it can be determined that failure occurs in C2 downstreams.
Fault Isolation：Because C2 is on-load switch, it is impossible to which on-load trips, therefore switchs G1 by transformer station's wire-outgoing breaker
Tripping, and start FA, C2 again tripping with isolated fault.
Fault recovery：After Fault Isolation success, transformer station wire-outgoing breaker switch G1 closes a floodgate, non-faulting region DTU1 cabinets,
The other fault-free branch lines of DTU2 cabinets are restored electricity, and whole troubleshooting is finished.
Breakdown switch action logic as shown in Figure 10：Terminal D TU2 failure generation after processing procedure and with adjacent lateral terminal
Interactive information.When terminal D TU2 judges B1 as breakdown switch, because on-load switch can not disengagement failure electric current, it is therefore desirable to become
Power station outlet breaker is initially switched off, then breakdown switch B1 trippings again.Terminal D TU3 is also same processing logic, breakdown switch
A2 trippings, complete the isolation failure line.
As shown in figure 11, outlet breaker action logic：Terminal FTU1 action logic process, terminal FTU1 control power transformations
Stand outlet breaker, after the request of the tripping operation from breakdown switch is received, can tripping circuit breaker, and send FA enabling signals；
The isolation pass signal sent after breakdown switch tripping success is received, closes breaker, recovers non-faulting region G1-A1's
Power supply.
As shown in figure 12, interconnection switch action logic：Interconnection switch terminal D TU4 action logic process, passes through adjacent two
The incoming supply path of lateral terminal may determine that switch B4 is interconnection switch.When interconnection switch B4 receives Fault Isolation success
Signal, can carry out the judgement of load transfer.This paper basis for estimation is：That compares that interconnection switch both sides receive is maximum allowable negative
Normality load before lotus and failure generation, if loadMax>LoadFault, then contact is closed；Otherwise do not conform to.
With reference to overhead transmission line network, the present invention is described in further detail：
Rack canonical topology of electric distribution network overhead wire is as shown in figure 13.Overhead transmission line draws from three 10kV transformer stations
Go out, interconnect to form circuit mesh by interconnection between different circuits, line network is divided into tree by three contact points, it is full
The characteristics of sufficient closed loop design open loop operation.
Transformer substation switch is breaker, configures the intelligent distributed terminal of the logic containing RTU；Switch and opened for load on circuit
Close, configure the intelligent distributed terminal of the logic containing FTU.
Intelligent distributed distribution automation equipment is by equipment intercommunication, protection cooperation or time cooperation, in distribution
When net breaks down, non-faulting block supply is recovered in isolated fault region, and process signal and implementing result are reported into main website,
I.e. by collecting the information of corresponding automation equipment, then with neighbouring device information is exchanged in the way of peer-to-peer communications, in above-mentioned letter
Intelligent distributed Automated condtrol logic is run on the basis of breath, realizes that fault location, isolation and non-faulting region restore electricity.
The fault-tolerant Fault Locating Method of overhead transmission line network specifically includes following steps：
1) fault location
During fault location, received by the over-current signal of automation equipment itself collection and from neighbouring device
Over-current signal come failure judgement occur position.For the equipment installed in transformer station's outlet or mast switch, itself is detected
After over-current signal, can up and down it be swum to supplier of electricity while transmitting over-current signal.If some switch only has itself over-current signal XOR
The signal that only neighbouring device is transmitted, then trouble point is on the switch external circuit.
Over-current signal when one typical open loop Distribution Network Frame ceases to be busy breaks down is as shown in figure 14, it is assumed that failure occurs
On the circuit of 1. position, substation exit breaker protection acts tripping, and now only transformer station's outlet switch detects excessively stream
Signal (represents excessively stream) in figure with red spots, by above-mentioned positioning logic, it is possible to determine that trouble point is located at transformer station's first and FTU1
On the circuit of switch.
(2) Fault Isolation
Fault Isolation operation is carried out on the basis of fault location is successful, and after fault location success, positioning logic is by root
Corresponding failure identification is produced according to the difference of trouble point, isolation logic will produce corresponding tripping operation according to different failure identifications and believe
Number.If the externally-located circuit in trouble point, external fault mark is produced respectively at the switch of circuit two ends.For external fault mark
Know, isolation logic by tripping external fault identify where switch.
Isolation processes when one typical open loop distribution overhead line breaks down as shown in figure 15, are patrolled according to foregoing positioning
Volume, failure identification will be produced at the two ends of faulty line, i.e. transformer station's first gate out switch, at the affiliated line switchings of FTU1, therefore
Barrier isolation logic is after this mark is detected, and each automation equipment sends respective switch trip signal respectively, realizes Fault Isolation.
(3) service restoration
Service restoration operation is carried out on the basis of Fault Isolation is successful, will when fault type is outside line failure
Failover procedure is triggered, recovery order is upstream sent out by fault zone and closes substation exit breaker (if trouble point is in outlet
Between breaker and first line switching, then order and produce without upstream recovery), downstream hair recovers to order conjunction contact to be opened
Close.After contact point receives recovery order, load anticipation can be carried out and load selects excellent.Load anticipation refers to precalculate, and closes connection
Whether network switching manipulation can cause to turn power supply source point overload operation, not perform conjunction interconnection switch operation if excess load, and pass
Go out anticipation overload signal.Load select it is excellent refer to exist it is multiple close interconnection switch in the case of, automatically select load factor most
Small power supply point turn for operation.
Recovery process when one typical open loop distribution overhead line breaks down is as shown in figure 16, after isolating successfully, by
It is located in failure on the circuit outside substation exit breaker, therefore does not produce upstream and recover signal, is sent out to fault zone downstream
Send recovery order to recover contact point, now there are two contact points of switch belonging to switch belonging to FTU2 and FTU6, if two contact points
Equal anticipation overload, then recovery process terminate；If one of contact point anticipation overload, conjunction is performed by another contact point
Lock is operated；If the non-anticipation overload in two contact points, excellent logic is selected to select the minimum power supply point of load factor to carry out by load
Turn for operation.The less transformer station's second of load factor has been automatically selected in figure and has carried out load transfer, FTU2 switches perform closing operation.
Figure 17 describe terminal FTU1 2. position broken down shown in grid structure figure after processing procedure and with neighbour
The information of lateral terminal interaction.When terminal FTU1 judges that failure is on the right side of this switch, because on-load switch can not disengagement failure electricity
Stream, it is therefore desirable to which substation exit breaker is initially switched off, then breakdown switch tripping again.
Figure 18 describes action logic processes of the terminal RTU1 after 2. position is broken down shown in grid structure figure, terminal
RTU1 controls substation exit breaker, after the request of the tripping operation from breakdown switch is received, meeting tripping circuit breaker, and sends
FA enabling signals；The isolation pass signal sent after breakdown switch tripping success is received, closes breaker, recovers non-faulting
The power supply in region.
Figure 19 describes action logic mistake of terminal FTU2, FTU5 after 5. position is broken down shown in grid structure figure
Journey, may determine that switch belonging to FTU2, FTU5 is interconnection switch by the incoming supply path of adjacent two lateral terminal.Work as contact
Switch receives Fault Isolation pass signal, can carry out the judgement of load transfer.The basis for estimation of logic is：
Compare maximum permissible load that interconnection switch both sides receive and failure occur before normality load, if loadMax>
LoadFault, then contact point can close a floodgate, otherwise can not close a floodgate.The latter compares belonging to interconnection switch on the basis of previous
Close a floodgate the load factor loadBetter of power supply, the less contact point of load factor.
Figure 20 describes reclosing analysis logic.Operation of Electric Systems experience have shown that, the most of failure of overhead transmission line
All it is " instantaneity ", the insulating properties (insulator and the air gap) of circuit can be restored after circuit breaker trip, weigh again
Closing can be successful, and this provides for improved the reliability of power system power supply.Therefore, automatic reclosing is to be widely used in overhead line distribution
On circuit.Figure below describes the analysis process of the reclosing after being broken down on circuit, when transformer station's wire-outgoing breaker input weight
Logic will go into reclosing analysis module during combined floodgate.If non-faulty current after overlapping, successful reclosing, original failure is wink
When failure；If overlap after still faulty electric current, reclosing failure, breaker will tripping again, failure is permanent fault, after
It is continuous to start FA.
The present invention effectively improves the reliability that is supplied with electric power, and reduces failure occurrence probability.Shorten failure recovery time.By to
Power network and its equipment running status are monitored in real time, are changed " blind pipe " and are found in time and eliminate potential faults, reduce the generation of failure.
The high reliability of power supply A+ core spaces 99.999% is met, is had and its important meaning.Because trouble point is uncertain, traffic is gathered around
Squeeze etc. factor influence, traditional dependence manpower realize trouble point isolate, generally require Fault Isolation and restore electricity the time compared with
It is long, and apply FA distribution network to complete Fault Isolation, non-faulting load section within a few minutes even several milliseconds of times
Normal power supply, can substantially reduce fault incidence and power off time, improve power supply reliability.The present invention is improved simultaneously
The quality of power supply.The present invention, to the real-time detection of feeder plant, distribution line supply voltage can be monitored in real time using feeder automation
Change and harmonic content etc., operations staff is found power quality problem in time, by adjusting the method for operation, adjust transformation
The measures such as device tap gear, switching reactive compensation capacitor group.Present invention reduces safeguard intensity.Conventional feeder line breaks down,
No matter which kind of weather and when, be required for operator on duty to be on the scene in time, search trouble point, and need report without delay tune
Degree, can just restore electricity from personnel's coordination in different portions mouthful, and by automation equipment, the distant place behaviour of troubleshooting can be achieved
Make, be automatically brought into operation, greatly reduce workload, reduce work and safeguard intensity.The present invention forms standard set power distribution network
Fault location and quickly isolate recovery control technology implementation method.Technique not only can be with the operation of efficient stable, can be with
Standardization can be reached, the end product produced so as not to same equipment manufacturer is interconnected, interoperated, promote the big face of technique
Product is promoted.
The content that this specification is not described in detail belongs to prior art known to professional and technical personnel in the field.
Claims (10)
1. a kind of distribution network failure positions and quickly isolated recovery control method, it is characterised in that：It comprises the following steps
The first step, arranges that possesses the intelligent distributed feeder line of distributed power Single-ring network in each looped network node of power distribution network
Distributed intelligent terminal the device DTU, each distributed intelligent terminal device DTU for automating (FA) function adapt to its place automatically
Overhead transmission line or cable run network node location, are responsible for collecting the telecontrol information of its location monitoring unit collection；
It is in communication with each other between second step, each distributed intelligent terminal device DTU by fiber direct connection mode or EPON modes,
Share adjacent distributions formula intelligent end device DTU telecontrol information mutually, the intelligent distributed feedback of electric power Single-ring network is realized jointly
Line automation function；
3rd step, when short trouble occurs for circuit, the electric power Single-ring network intelligent distribution type feeder automation DTU close to trouble point
Fault message can be collected into, and is transmitted to adjacent electric power Single-ring network intelligent distribution type feeder automation DTU；Each electric power Single-ring network
Intelligent distribution type feeder automation DTU combines the information that collects, and from electric power Single-ring network intelligent distribution type feeder automation
The information that DTU left and right sides adjacent power Single-ring network intelligent distribution type feeder automation DTU is received carries out comprehensive analysis, comes true
Determine oneself state and residing logical link, fault location is completed eventually through time cooperation；
4th step, each distributed intelligent terminal device DTU is according to the result of fault location, the program of respective startup separator isolation；
First, each distributed intelligent terminal device DTU sends a command to the corresponding distributed intelligent terminal device DTU of faulty equipment, point
Cloth intelligent end device DTU drives the behaviour mechanism of respective electric equipment to the corresponding breaker in fault zone according to isolation order
Or on-load switch performs sub-switching operation or reclosing operation is corresponding, and breaker or on-load switch position signalling is waited to confirm to divide
Lock, is finally completed Fault Isolation；
5th step, after isolating successfully, in order to avoid forced outage scope is excessive, is tackled in transformer station's wire-outgoing breaker, non-faulting
The distributed intelligent terminal device DTU in region branch line restores electricity；Each distributed intelligent terminal device DTU is to fault zone
The breaker or on-load switch of upstream and downstream, which are sent, recovers order, the distributed intelligent terminal device DTU of upstream substation exit with
And the distributed intelligent terminal device DTU of downstream contact point is after order is received, the electrically operated institution of driving respective electric equipment is held
Row closing operation, and wait conjunction position signal to confirm, the optimization for completing fault zone is recovered.
2. distribution network failure according to claim 1 positioning and quickly isolate recovery control method, it is characterised in that with
Network system is open position by 2 transformer station's ring network power supplies, wherein B4 on-load switches, as the circuit F1 between Liang Ge switching stations
When point breaks down：
Breakdown judge is carried out first：On-load switch A1 in breaker G1 in transformer station's first, distributed intelligent terminal device DTU1,
On-load switch B1 detects the Sudden Changing Rate of fault current, false voltage, behind distributed intelligent terminal device DTU2 and circuit
Distributed intelligent terminal device DTU do not detect and pass through ether between failure, adjacent distributions formula intelligent end device DTU cabinets
Net exchange trouble information, can position failure and occur between on-load switch B1 and on-load switch A2；
Then Fault Isolation is carried out：Because on-load switch B1 and A2 are unable to on-load tripping operation, therefore by transformer station's wire-outgoing breaker
G1 trippings, and electric power Single-ring network intelligent distribution type feeder automation FA, on-load switch B1, on-load switch A2 trippings again, it is final real
Existing Fault Isolation；
Fault recovery is carried out again：After Fault Isolation success, transformer station wire-outgoing breaker switch G1 closes a floodgate, non-faulting area distribution formula
On-load switch A1 and branch line in intelligent end device DTU1 restore electricity；Get in touch with on-load switch B4 to close a floodgate, non-faulting region point
On-load switch B2 and branch line restore electricity in cloth intelligent end device DTU3, distributed intelligent terminal device DTU2, whole event
Barrier is disposed.
3. distribution network failure according to claim 1 positioning and quickly isolate recovery control method, it is characterised in that with
Network system is open position by 2 transformer station's ring network power supplies, wherein B4 on-load switches, when event occurs for bus F2 points between switching station
During barrier：
Breakdown judge is carried out first：On-load switch A1 in breaker G1 in transformer station's first, distributed intelligent terminal device DTU1,
On-load switch A2 detects the mutation of fault current, false voltage in on-load switch B1, distributed intelligent terminal device DTU2
Amount, the distributed intelligent terminal device DTU in distributed intelligent terminal device DTU2 behind on-load switch B2 and circuit does not have
Detect and pass through Ethernet exchanging fault message between failure, adjacent distributed intelligent terminal device DTU, it can be determined that failure is sent out
Life is between on-load switch A2 and on-load switch B2；
Then Fault Isolation is carried out：On-load switch A2 and B2 are unable to on-load tripping operation, therefore are jumped by transformer station wire-outgoing breaker G1
Open, and electric power Single-ring network intelligent distribution type feeder automation FA, on-load switch A2, on-load switch B2 again tripping with isolated fault；
Fault recovery is carried out again：After Fault Isolation success, transformer station wire-outgoing breaker G1 closes a floodgate, non-faulting area distribution formula intelligence
Terminal installation DTU1 restores electricity；Interconnection switch B4 closes a floodgate, and non-faulting area distribution formula intelligent end device DTU3 restores electricity,
Distributed intelligent terminal device DTU2 power failures in fault zone are to be checked, and whole troubleshooting is finished.
4. distribution network failure according to claim 1 positioning and quickly isolate recovery control method, it is characterised in that with
Network system is open position by 2 transformer station's ring network power supplies, wherein on-load switch B4, and when switching station, branch line F3 points break down
When：
Breakdown judge is carried out first：On-load switch A1, load are opened in G1 in transformer station's first, distributed intelligent terminal device DTU1
On-load switch A2 in B1, distributed intelligent terminal device DTU2 is closed, on-load switch C2 detects failure, distributed intelligent terminal
Distributed intelligent terminal device DTU in device DTU2 behind on-load switch B2 and circuit does not detect failure, adjacent point
Pass through Ethernet exchanging fault message between cloth intelligent end device DTU cabinets, it can be determined that failure occurs under on-load switch C2
Trip；
Then Fault Isolation is carried out：Because C2 is on-load switch, it is impossible to which on-load trips, therefore by transformer station wire-outgoing breaker G1
Tripping, and electric power Single-ring network intelligent distribution type feeder automation FA, C2 again tripping with isolated fault；
Fault recovery is carried out again：After Fault Isolation success, transformer station wire-outgoing breaker G1 closes a floodgate, non-faulting area distribution formula intelligence
The other fault-free branch lines of terminal installation DTU1, distributed intelligent terminal device DTU2 are restored electricity, and whole troubleshooting is finished.
5. the distribution network failure according to claim any one of 2-3 positions and quickly isolated recovery control method, its feature
It is that certain line switching is judged as after failure, because on-load switch can not disengagement failure electric current, substation exit breaker
It is initially switched off, then breakdown switch B1 trippings again；It is adjacent with breakdown switch B1 in the adjacent distributed intelligent terminal device DTU in downstream
Breakdown switch A2 trippings, complete isolation failure line.
6. the distribution network failure according to claim any one of 2-3 positions and quickly isolated recovery control method, its feature
It is for controlling the terminal FTU1 of substation exit breaker to receive after the tripping operation request from breakdown switch, can tripping change
Power station outlet breaker, and send intelligent distribution type feeder automation function on signal；When receive breakdown switch tripping into
The isolation pass signal sent after work(, closes substation exit breaker, recovers non-faulting region breaker G1 to on-load switch
Power supply between A1.
7. the distribution network failure according to claim any one of 2-3 positions and quickly isolated recovery control method, its feature
It is that interconnection switch terminal judges that switch is interconnection switch by the incoming supply path of adjacent two lateral terminal；Work as interconnection switch
Fault Isolation pass signal is received, the judgement of load transfer can be carried out；Load lotus turn supply basis for estimation be：Compare contact to open
Close the maximum permissible load that receives of both sides and failure occur before normality load, if maximum permissible load is more than before failure occurs
Normality load, then interconnection switch close, otherwise do not conform to.
8. the distribution network failure according to claim any one of 2-3 positions and quickly isolated recovery control method, its feature
It is terminal after trip signal is sent, breakdown switch is at the appointed time without disjunction, then it is assumed that the line switching is refused
It is dynamic；Overhead line distribution feeder automation FA using malfunctioning switch as configurable item, if overhead line distribution feeder automation FA
The built-in soft pressing plate of failure is set to input, then the line switching of tripping can spread out of unsuccessful reason signal, and the line switching of tripping is adjacent
Side line way switch tripping is with isolated fault, and follow-up logic of recovering is normally carried out；If the soft pressing plate of failure is set to not put into, tripping
Line switching outflow intelligent distribution type feeder automation function block signal, the circuit breaker lock of whole piece circuit, outlet breaker
Trip protection.
9. the distribution network failure according to claim any one of 2-3 positions and quickly isolated recovery control method, its feature
If it is switch malfunction to be that line switching does not receive jump order switch separating brake or do not receive conjunction order switch and close a floodgate；If judging
Line switching malfunction, then the distributed feeder automation FA block signals of line switching outflow overhead line of malfunction, whole piece circuit
Circuit breaker lock, outlet breaker keeps closing a floodgate.
10. the distribution network failure according to claim any one of 2-3 positions and quickly isolated recovery control method, its feature
It is that occurring communication abnormality between the distributed feeder automation FA of overhead line uses following two kinds of processing modes：Region-wide logic is closed
Lock or the region-wide logic blocking of abnormal area logic blocking refer to after finding that communication abnormality occurs for any terminal room, understand to whole
Logic operation region sends logic blocking signal, eliminates the possibility of automation misoperation；Abnormal area logic blocking refers to
It was found that any terminal room occurs after communication abnormality, a locking uses the logical gate of the passage, when generation in communication abnormality region
During failure, expand area of isolation.
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