CN105375635B - Power distribution network cascades switching station's intelligent management and system - Google Patents
Power distribution network cascades switching station's intelligent management and system Download PDFInfo
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- CN105375635B CN105375635B CN201510871125.6A CN201510871125A CN105375635B CN 105375635 B CN105375635 B CN 105375635B CN 201510871125 A CN201510871125 A CN 201510871125A CN 105375635 B CN105375635 B CN 105375635B
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- 230000004224 protection Effects 0.000 claims abstract description 97
- 238000013024 troubleshooting Methods 0.000 claims abstract description 43
- 238000004891 communication Methods 0.000 claims abstract description 40
- 239000013307 optical fiber Substances 0.000 claims abstract description 29
- 238000007726 management method Methods 0.000 claims abstract description 25
- 238000002955 isolation Methods 0.000 claims abstract description 22
- 230000005540 biological transmission Effects 0.000 claims abstract description 10
- 238000000034 method Methods 0.000 claims description 11
- 230000003287 optical effect Effects 0.000 claims description 11
- 238000012544 monitoring process Methods 0.000 claims description 10
- 238000012545 processing Methods 0.000 claims description 10
- 230000009471 action Effects 0.000 claims description 8
- 238000004458 analytical method Methods 0.000 claims description 7
- 230000002452 interceptive effect Effects 0.000 claims description 6
- 238000001514 detection method Methods 0.000 claims description 5
- 238000005516 engineering process Methods 0.000 claims description 4
- 239000012141 concentrate Substances 0.000 claims description 3
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- 238000009825 accumulation Methods 0.000 claims 1
- 230000015572 biosynthetic process Effects 0.000 abstract description 3
- 230000006837 decompression Effects 0.000 description 10
- 230000005611 electricity Effects 0.000 description 7
- 239000000835 fiber Substances 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
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Classifications
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- H02J13/0006—
-
- 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
- H02H7/22—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 for distribution gear, e.g. bus-bar systems; for switching devices
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/263—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of measured values
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00019—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using optical means
-
- 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
- Y04S40/00—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them
- Y04S40/12—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment
- Y04S40/124—Systems for electrical power generation, transmission, distribution or end-user application management characterised by the use of communication or information technologies, or communication or information technology specific aspects supporting them characterised by data transport means between the monitoring, controlling or managing units and monitored, controlled or operated electrical equipment using wired telecommunication networks or data transmission busses
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- Engineering & Computer Science (AREA)
- Power Engineering (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
- Small-Scale Networks (AREA)
Abstract
The invention discloses a kind of power distribution network cascade switching station's intelligent management and system, its main technical schemes includes at least two switching stations, being constituted between all switching stations has optical fiber ring network, each switching station is provided with troubleshooting terminal, each troubleshooting terminal is connected by Ethernet switch with the optical fiber ring network, each troubleshooting terminal is provided with communication server, and all communication servers are connected with distribution main website.The present invention introduces the thought of circuit optical fiber differential protection and direction protection the troubleshooting of power distribution network, according to power supply relation formation power distribution network cascade switching station intelligent management system.High-speed traffic between range site network between terminal, a transmission fault-signal, autonomous negotiating, the selectivity of protection act, disposably realizes Fault Isolation when solving feeder fault.
Description
Technical field：
The present invention relates to a kind of cascade of power distribution network, switching station safeguards and managed, more particularly to a kind of power distribution network cascade opening and closing
Institute's intelligent management and system.
Background technology：
With the development and the continuous improvement of the people's material and cultural life level of national economy, user is to power supply reliability
It is required that also more and more higher.The life not only given people that has a power failure is brought inconvenience, brings very big economic loss, and society can be made
Into very big negative effect.Correlative study shows that 40 yuan of economic loss can averagely be brought to user by often stopping kilowatt-hour, and China is every
Economic loss year caused by power failure reaches hundreds billion of members.So the power supply reliability of power distribution network is badly in need of improving, power distribution network is solved
Troubleshooting problem is to improve the key of distribution network reliability.
Zhengzhou is state's net company power distribution automation experimental city, and current Yi Zhengdong new districts and new and high-tech development zone set up
Electrical power distribution automatization system, uses main website+DTU patterns, and the equipment real time information that main website is uploaded according to DTU carries out power distribution network
Running state analysis and monitoring.When this pattern is that failure occurs, substation exit switch trip excision failure, then by information
Upload to and combined floodgate is remotely controlled after main website, main station judging fault section, recover non-faulting block supply, this troubleshooting pattern
There are problems that, some shortcomings are found in running：DTU does not possess trip protection function, failure bypass the immediate leadership after occurring to
Transformer station trips, and expands accident impact；Troubleshooting is controlled in main website, and Fault Isolation and service restoration time are longer, generally
20-30 seconds；Communicate dependency degree high, Fault Isolation is easily influenceed with service restoration by communication link.
The content of the invention：
The technical problems to be solved by the invention are：Overcoming the deficiencies in the prior art, there is provided reasonable in design, the simple reality of one kind
It is quick and reduce the power distribution network of power off time cascade switching station's intelligent management and system with, handling failure.
The technical scheme is that：
1st, a kind of power distribution network cascade switching station intelligent management, comprises the following steps：
A, constituted between all switching stations and have an optical fiber ring network, it is whole that each switching station is provided with troubleshooting
End, each troubleshooting terminal is connected by Ethernet switch with the optical fiber ring network, the troubleshooting terminal
Between high-speed traffic between range site network, only transmission fault-signal, autonomous negotiating, protection act when solving feeder fault
Selectivity, disposably realize Fault Isolation；
B, by means of circuit optical fiber passage, transmit sampled data to offside in real time, while receive the sampled data of offside,
Local pressed with offside current data of each side Sustainable use mutually carries out difference current calculating, according to the braking characteristic of current differential protection
Equation is differentiated, is judged to action tripping operation during troubles inside the sample space, protection is failure to actuate when being judged to external area error, while utilizing power direction
Relay or power directional element judge the direction of short-circuit power and acted with selecting to start corresponding protection device；
C, to different switchgear distribution pilot protection, intelligent failure protection, overcurrent protection and fast tripping protection in switching station, pass through
Reciprocally negotiate independent of main website and realize Fault Isolation and service restoration to complete to cascade the troubleshooting between switching station, meanwhile,
The voltage collected, electric current, power, the position of the switch, fault message etc. are transferred to distribution main website by optical fiber, power distribution network is carried out
Real-time monitoring and analysis, remote control.
When breaking down according to the fault message of itself and adjacent switch determine itself whether quick acting；Failure protection is
In subordinate's switch failure, the failure protection of higher level's switch is switched without time delay tripping higher level, cuts off failure, is eliminated after conventional overcurrent
The time delay cumulative effect step by step of standby protection, shortens fault clearing time.
When system jam, the fault message of itself can be sent at once by detecting the terminal of fault current, while root
Carry out Judging fault section according to the information for receiving adjacent end, if terminal oneself detects failure, secondary terminal does not detect event
Barrier, then pilot protection acts excision failure at once；If terminal oneself detects failure, secondary terminal also detects failure, then eventually
Hold the pilot protection of locking itself, the action situation of standby failure protection monitoring subordinate switch, subordinate's switch regular event, failure
It is isolated, if subordinate's switch failure, intelligent failure protection acts excision failure at once.
Terminal is by electric signal interactive information in switching station station, and internal fault of standing extends no longer to outside station；Terminal passes through between standing
Optical signal interactive information, realizes the processing of failure between station, by the whole network Millisecond pilot protection, is jumped from the switch of trouble point recently
Lock, while it is back-up protection to configure intelligent failure protection, definite value adapts to the power supply mode in different electrical power direction automatically, it is ensured that definite value
The correctness of cooperation, reduces power failure range, accelerates troubleshooting and service restoration.
Fault Isolation and service restoration according to distribution rack once and its power supply relation, form small model independent of main website
The electrical power distribution automatization system enclosed, it is to avoid troubleshooting concentrates on main website, Fault Isolation and confession are carried out by distribution terminal autonomous negotiating
Electricity recovers.
Each troubleshooting terminal is provided with communication server, all communication server with distribution master
Stand connection, detection information and processing information are transferred in distribution main website in time.
Back-up protection can be put into during system communication failure, back-up protection is only with the event inside switching station or between switching station
Hinder the logical relation between voltage, fault current, integrated use switching station internal logic judges control, voltage and power side on the spot
To cooperation, the differential technology of switching station's node time；It is automatic calculate, judge, processing realize failure between level Four cascade switching station every
From and non-faulting region service restoration；The voltage collected, electric current, power, the position of the switch, fault message etc. are passed through simultaneously
GPRS transmission is to distribution main website, to carry out the real-time monitoring and analysis of power distribution network；The troubleshooting of switching station and service restoration
Independent of GPRS communications, GPRS is communicated only as data transmission channel.
With reference to first half-wave and zero-sequence current colony amplitude comparison phase comparing method, the zero-sequence current of all outlets is first carried out on collection bus
Amplitude com parison, selects to cross the several circuits of setting valve and carry out 1/4 week wave phase again and compares, if the phase of certain circuit zero-sequence current
Position is different from other circuits, then it is faulty line, if all zero-sequence current same-phases, for bus-bar fault, using with
The current transformer of Weak current detection, primary current is put into linear transformation, high current speed per hour saturation, excitation at tens milliamperes
Electric current is faint, secondary to export milliampere level, it is ensured that to gather the accurate of electric current.
A kind of power distribution network cascade switching station intelligent management system, including at least two switching stations, all switching stations
Between constitute have optical fiber ring network, each switching station is provided with troubleshooting terminal, and each troubleshooting terminal is equal
It is connected by Ethernet switch with the optical fiber ring network, each troubleshooting terminal is provided with communication server, institute
The communication server having is connected with distribution main website.
The troubleshooting terminal is arranged in the rack in the switching station or switchgear house；The communication server bag
Include OLT device, ONU equipment and optical splitter；The OLT device uses many PON jaws equipments, and the ONU equipment is from double-PON port
Connecting port, second line of a couplet automatization terminal uses network interface.
The beneficial effects of the invention are as follows：
1st, the present invention transfers to the function of troubleshooting in terminal, when line failure, independent of communication or main
Stand, troubleshooting is mainly carried out by autonomous negotiating between terminal, make from the nearest switch in trouble point protection act at first, it is maximum
The reduction power failure range of degree.
2nd, the present invention introduces the thought of circuit optical fiber differential protection and direction protection the troubleshooting of power distribution network, according to confession
Electric relation formation power distribution network cascade switching station intelligent management system.High-speed traffic between range site network between terminal, is only passed
Pass fault-signal, autonomous negotiating, the selectivity of protection act, disposably realizes Fault Isolation when solving feeder fault.
3rd, it, to the supplement of existing electrical power distribution automatization system and perfect, is also to existing electrical power distribution automatization system work(that the present invention, which is,
The lifting of energy, and then the application of power distribution automation main station Premium Features is preferably realized, it is easy to carry out distribution to whole power distribution network
Management.
4th, it is no main structure between present system, looped network is constituted by the industrial optical fiber ethernet module built in system,
To different switchgear distribution pilot protections, intelligent failure protection, overcurrent protection, fast tripping protection etc. in switching station, by reciprocally negotiating
Fault Isolation and service restoration are realized in the troubleshooting for completing to cascade between switching station independent of main website.
5th, Fault Isolation of the present invention and service restoration are fast, and terminal device is using at optical-fibre communications autonomous negotiating between switching station
Reason, with the speed isolated fault of Millisecond, adapts to arbitrarily complicated electric network composition.Whole process of fault isolation does not need main website ginseng
With.
6th, the present invention is reasonable in design, simple and practical, handling failure is quick and reduces power off time, and its is applied widely, easily
In promotion and implementation, with good economic benefit.
Brief description of the drawings：
Fig. 1 is the structure chart that power distribution network cascades switching station's intelligent management system；
Fig. 2 is that power distribution network cascade switching station intelligent management system implements one of structure chart；
Fig. 3 is that power distribution network cascades switching station's intelligent management system implements structure chart two.
Embodiment：
Embodiment：Referring to Fig. 1-Fig. 3, in figure, 1- troubleshooting terminals, 2- communication servers, 3- Ethernet switches, 4-
Optical fiber ring network, 5- distribution main website.
A kind of power distribution network cascade switching station intelligent management, comprises the following steps：
A, between all switching stations constitute have optical fiber ring network 4, each switching station is provided with troubleshooting terminal 1,
Each troubleshooting terminal 1 is connected by Ethernet switch 3 with optical fiber ring network 4, range site between troubleshooting terminal 1
High-speed traffic between network, only transmits fault-signal, autonomous negotiating, the selectivity of protection act, one when solving feeder fault
Realize Fault Isolation to secondary property；
B, by means of circuit optical fiber passage, transmit sampled data to offside in real time, while receive the sampled data of offside,
Local pressed with offside current data of each side Sustainable use mutually carries out difference current calculating, according to the braking characteristic of current differential protection
Equation is differentiated, is judged to action tripping operation during troubles inside the sample space, protection is failure to actuate when being judged to external area error, while utilizing power direction
Relay or power directional element judge the direction of short-circuit power and acted with selecting to start corresponding protection device；
C, to different switchgear distribution pilot protection, intelligent failure protection, overcurrent protection and fast tripping protection in switching station, pass through
Reciprocally negotiate independent of main website and realize Fault Isolation and service restoration to complete to cascade the troubleshooting between switching station, meanwhile,
The voltage collected, electric current, power, the position of the switch, fault message etc. are transferred to distribution main website 5 by optical fiber, distribution is carried out
The real-time monitoring and analysis, remote control of net.
When breaking down according to the fault message of itself and adjacent switch determine itself whether quick acting；Failure protection is
In subordinate's switch failure, the failure protection of higher level's switch is switched without time delay tripping higher level, cuts off failure, is eliminated after conventional overcurrent
The time delay cumulative effect step by step of standby protection, shortens fault clearing time.
When system jam, the fault message of itself can be sent at once by detecting the terminal of fault current, while root
Carry out Judging fault section according to the information for receiving adjacent end, if terminal oneself detects failure, secondary terminal does not detect event
Barrier, then pilot protection acts excision failure at once；If terminal oneself detects failure, secondary terminal also detects failure, then eventually
Hold the pilot protection of locking itself, the action situation of standby failure protection monitoring subordinate switch, subordinate's switch regular event, failure
It is isolated, if subordinate's switch failure, intelligent failure protection acts excision failure at once.
Terminal is by electric signal interactive information in switching station station, and internal fault of standing extends no longer to outside station；Terminal passes through between standing
Optical signal interactive information, realizes the processing of failure between station, by the whole network Millisecond pilot protection, is jumped from the switch of trouble point recently
Lock, while it is back-up protection to configure intelligent failure protection, definite value adapts to the power supply mode in different electrical power direction automatically, it is ensured that definite value
The correctness of cooperation, reduces power failure range, accelerates troubleshooting and service restoration.
Fault Isolation and service restoration according to distribution rack once and its power supply relation, form small model independent of main website
The electrical power distribution automatization system enclosed, it is to avoid troubleshooting concentrates on main website, Fault Isolation and confession are carried out by distribution terminal autonomous negotiating
Electricity recovers.
Each troubleshooting terminal is provided with communication server 2, all communication server 2 with distribution main website
5 connections, detection information and processing information are transferred in distribution main website 5 in time.
Back-up protection can be put into during system communication failure, back-up protection is only with the event inside switching station or between switching station
Hinder the logical relation between voltage, fault current, integrated use switching station internal logic judges control, voltage and power side on the spot
To cooperation, the differential technology of switching station's node time；It is automatic calculate, judge, processing realize failure between level Four cascade switching station every
From and non-faulting region service restoration；The voltage collected, electric current, power, the position of the switch, fault message etc. are passed through simultaneously
GPRS transmission is to distribution main website, to carry out the real-time monitoring and analysis of power distribution network；The troubleshooting of switching station and service restoration
Independent of GPRS communications, GPRS is communicated only as data transmission channel.
With reference to first half-wave and zero-sequence current colony amplitude comparison phase comparing method, the zero-sequence current of all outlets is first carried out on collection bus
Amplitude com parison, selects to cross the several circuits of setting valve and carry out 1/4 week wave phase again and compares, if the phase of certain circuit zero-sequence current
Position is different from other circuits, then it is faulty line, if all zero-sequence current same-phases, for bus-bar fault, using with
The current transformer of Weak current detection, primary current is put into linear transformation, high current speed per hour saturation, excitation at tens milliamperes
Electric current is faint, secondary to export milliampere level, it is ensured that to gather the accurate of electric current.
Troubleshooting terminal 1 is arranged in the rack in switching station or switchgear house；Communication server 2 include OLT device,
ONU equipment and optical splitter；OLT device uses many PON jaws equipments, and ONU equipment is from connecting port on double-PON port, second line of a couplet automation
Terminal uses network interface.
1.1 local power distribution automation schemes
, can be quick, reliable comprising switching station, troubleshooting suitable for the distribution network of any cascade connection, below with
Level Four switching station illustrates.
By transformer station A 8 plates, 31 plates, transformer station B 23 plates, 3 plates and 1#, 2#, 3#, 4# switching station constitute one
The looped network hand in hand of level Four cascade switching station.System construction drawing is illustrated in fig. 2 shown below：
1.1.1 fault of interconnected transmission line
Assuming that interconnection breaks down between 2#, 3# switching station, fault treating procedure is as follows：
1) 1#8DL, 1#7DL, 2#8DL, 2#7DL all experience excessively stream, and 3#8DL does not have excessively stream, and switch is believed by failure
The exchange of breath is consulted, and judges fault section between 2#7DL, 3#8DL；
2) 1#8DL, 1#7DL, 2#8DL locking pilot protection；
3) 2#7DL pilot protections are tripped, and failure is removed；
4) o-volt protection of 3#8DL inlet wires is tripped, and failure is isolated；3#11DL one side decompression time-delay closing, non-faulting section
Service restoration；
5) system sends SMS notification related personnel：
A) 2# switching stations interconnection 7DL trip protections, failure has been isolated；
B) 3# switching stations inlet wire 8DL trips, and 11DL closes a floodgate, and non-faulting region restores electricity.
1.1.2 bus-bar fault
Assuming that 2# switching stations bus breaks down, fault treating procedure is as follows：
1) 1#8DL, 1#7DL, 2#8DL experience the no excessively stream of all outlets on excessively stream, 2#I sections of buses, pass through event
The exchange for hindering information is consulted, and judgement is out of order generation on 2# I section buses；
2) 2#8DL pilot protections action tripping operation, 3#8DL inlet wires o-volt protection tripping operation, failure is isolated；
3) the unilateral decompression time-delay closings of 3#11DL, non-faulting section service restoration；
4) system sends SMS notification related personnel：
A) I section of bus-bar fault of 2# switching stations, 8DL overcurrent protections tripping operation, failure has been isolated；
B) 3# switching stations inlet wire 8DL is tripped, and failure has been isolated；
C) 3# switching stations mother 11DL closes a floodgate, and non-faulting region restores electricity.
1.1.3 subscriber line out of order
Assuming that 2# switching stations user's line breaks down, fault treating procedure is as follows：
1) 1#8DL, 1#7DL, 2#8DL, 2#6DL experience over-current signal, and 1#8DL, 1#7DL, 2#8DL are believed by failure
The exchange of breath is consulted, and is judged as external area error；
2) 1#8DL, 1#7DL, 2#8DL locking pilot protection；
3) 2#6DL fast tripping protections action tripping operation, failure is isolated；
4) system sends SMS notification related personnel：2# switching stations interconnection 6DL trip protections, failure has been isolated.
1.1.4 communication failure
Assuming that interconnection breaks down between 2#, 3# switching station.In normal communication, each device in real time monitor with up and down
, if 3# switching stations are in failure, there is Communication, fault treating procedure is as follows in communication conditions between level station：
1) in the case of communication 2# with 3# electric substations communication failure, 2#7DL, 3#8DL locking pilot protection, 2#
7DL standby overcurrent protection starts excision failure；
2) 3#8DL is tripped after decompression, isolated fault, and time-delay closing after the decompression of 3#11DL one side, non-faulting section is powered
Recover；
3) system sends SMS notification related personnel：
A) 2# switching stations interconnection 7DL trip protections, failure has been isolated；
B) 3# switching stations inlet wire 8DL trips, and 11DL closes a floodgate, and non-faulting region restores electricity.
1.2 without local power distribution automation scheme when communicating
The distribution network of level Four is no more than suitable for cascade connection, is to be illustrated below with level Four switching station.
By transformer station A 8 plates, 31 plates, transformer station B 23 plates, 3 plates and 1#, 2#, 3# switching station constitute one 3 grades
Cascade the looped network hand in hand of switching station.System construction drawing is illustrated in fig. 3 shown below：
1.2.1 fault of interconnected transmission line
Assuming that interconnection breaks down between 1#, 2# switching station, fault treating procedure is as follows：
1) fast tripping protection that 1# switching stations 7DL has differential delay trips；
2) 2# switching stations service entrance switch 8DL decompressions are tripped, and failure is isolated；
3) the unilateral decompressions of 2# switching stations bus connection switch 11DL are closed a floodgate, non-faulting section service restoration；
4) system sends SMS notification related personnel：
A) 1# switching stations interconnection 7DL overcurrent protections are tripped, and failure has been isolated
B) 2# switching stations inlet wire 8DL decompressions trip, and 11DL closes a floodgate, and non-faulting region restores electricity.
1.2.2 bus-bar fault
Assuming that I section of bus of 1# switching stations breaks down, fault treating procedure is as follows
1) fast tripping protection that 1# switching stations 8DL has differential delay trips；
2) 2# switching stations service entrance switch 8DL decompressions are tripped, and failure is isolated；
3) the unilateral decompressions of 2# switching stations bus connection switch 11DL are closed a floodgate, non-faulting section service restoration；
4) system sends SMS notification related personnel：
A) I section of bus-bar fault of 1# switching stations, 8DL overcurrent protections tripping operation, failure has been isolated；
B) 2# switching stations inlet wire 8DL decompressions are tripped, and failure has been isolated；
C) 2#11DL closes a floodgate, and non-faulting region restores electricity.
1.2.3 subscriber line out of order
Assuming that 1# switching stations 6DL breaks down, fault treating procedure is as follows：
1) 1# switching stations 6DL delays overcurrent protection in 0 second tripping operation, Fault Isolation；
2) system sends SMS notification related personnel：1# switching stations 6DL failures, failure has been isolated.
1.3 communication scheme explanations
Communication is that the fiber optic loop of the fast failure fiber optic loop that uses of processing and upper main website can be unified to be same optical cable, is
Ensure enough reserved, it is proposed that how standby 4 core optical cable.
（1）Power distribution network cascade switching station intelligent management system optical-fibre communications scheme
Optical fiber ring network used in system rapid communication at least needs the optical cable of 2 cores, it is possible to use current distribution automation
The spare fibre of system, 2 core fibres are provided between the switching station mutually cascaded and complete optical fiber ring network.
The information that the switching station mutually cascaded or the backbone of ring main unit are constituted on an optical fiber ring network, looped network is mainly out
Heartbeat message and failure message between pass.
Optical communication equipment needed for the intelligent management system configuration of power distribution network cascade switching station.
（2）Main website communication scheme on optical fiber
The information such as real time data, event, the troubleshooting result of local distribution power automation terminal equipment pass through Communications service
Device is linked among existing distribution automation main website.
A, communication network use hierarchy：Build up laterally contact, a longitudinally through IP-based data network.From upper
And under be successively：Backbone layer, Access Layer.
Backbone layer：By the main platform of the electrical integrated communication access of adapted（Electric company）Sub-platform is accessed to each adapted telecommunication
（Being located at city has each transformer station of 10kV outlets）.Realized by optical fiber.
Access Layer：Sub-platform is accessed to each middle press-fitting electric terminal by each adapted telecommunication.Accessed by each adapted telecommunication
Sub-platform is to each middle press-fitting electric terminal.
B, communication mode are based on fiber optic communication, using EPON networking modes.
C, consideration circuit all use optical fiber, and Preliminary design uses nonmetallic fire-retardant cable.
D, communication apparatus：OLT device, equipment uses many PON jaws equipments, can continue to use transformer station's existing device；ONU is set
Standby, from connecting port on double-PON port, second line of a couplet automatization terminal uses network interface；Optical splitter, connection OLT and ONU equipment.
The present invention introduces the thought of circuit optical fiber differential protection and direction protection the troubleshooting of power distribution network, according to power supply
Relation formation power distribution network cascade switching station intelligent management system.High-speed traffic between range site network between terminal, is only transmitted
Fault-signal, autonomous negotiating, the selectivity of protection act, disposably realizes Fault Isolation when solving feeder fault.
The present invention has switching station's construction unit network of cascade connection, and by quick interaction optical signal in terminal, configuration is vertical
UNPROFOR shield, intelligent failure protection, realize the whole network pilot protection, no time differential accumulative intelligent failure protection；Communication failure
When automatically processing for failure can be still realized by back-up protection；Main website is mainly responsible for data acquisition and event is browsed and distribution
The Premium Features such as management, network reconfiguration, main website and the terminal division of labor are clearly, Each performs its own functions；Can by the temperature of switching station, humidity,
Air draft, draining access system, realize the monitoring and control of switching station's operating mode.
Claims (8)
1. a kind of power distribution network cascade switching station intelligent management, comprises the following steps：
A, between all switching stations constitute have optical fiber ring network, each switching station is provided with troubleshooting terminal, often
Troubleshooting terminal described in one is connected by Ethernet switch with the optical fiber ring network, sharp between the troubleshooting terminal
With high-speed traffic between unit networks, fault-signal, autonomous negotiating, the selection of protection act when solving feeder fault are only transmitted
Property, disposably realize Fault Isolation；
B, by means of circuit optical fiber passage, transmit sampled data to offside in real time, while receive the sampled data of offside, each side
Local pressed with offside current data of Sustainable use mutually carries out difference current calculating, according to the braking characteristic equation of current differential protection
Differentiated, be judged to action tripping operation during troubles inside the sample space, protection is failure to actuate when being judged to external area error, while utilizing power direction relay
Device or power directional element judge the direction of short-circuit power and acted with selecting to start corresponding protection device；
C, to different switchgear distribution pilot protection, intelligent failure protection, overcurrent protection and fast tripping protection in switching station, by mutual
Fault Isolation and service restoration are realized in the troubleshooting for consulting to complete to cascade between switching station independent of main website, meanwhile, adopting
Voltage, electric current, power, the position of the switch, the fault message collected is transferred to distribution main website by optical fiber, carries out the real-time of power distribution network
Monitoring and analysis, remote control.
2. power distribution network cascade switching station intelligent management according to claim 1, it is characterized in that：When breaking down according to
The fault message of itself and adjacent switch determine itself whether quick acting；Failure protection is the higher level in subordinate's switch failure
The failure protection of switch is switched without time delay tripping higher level, cuts off failure, eliminates the accumulation of time delay step by step of conventional overcurrent back-up protection
Effect, shortens fault clearing time.
3. power distribution network cascade switching station intelligent management according to claim 1, it is characterized in that：Work as system jam
When, the fault message of itself can be sent at once by detecting the terminal of fault current, while according to receive adjacent end information come
Judging fault section, if terminal oneself detects failure, secondary terminal does not detect failure, then pilot protection acts cut at once
Except failure；If terminal oneself detects failure, secondary terminal also detects failure, then the pilot protection of terminal locking itself, after
Standby failure protection monitors the action situation of subordinate's switch, and subordinate's switch is operating normally, and failure is isolated, if subordinate's switch failure,
Then intelligent failure protection acts excision failure at once.
4. power distribution network cascade switching station intelligent management according to claim 1, it is characterized in that：Terminal in switching station station
By electric signal interactive information, internal fault of standing extends no longer to outside station；Terminal is realized between standing by optical signal interactive information between standing
The processing of failure, by the whole network Millisecond pilot protection, the switch trip nearest from trouble point, while configuring intelligent failure protection
For back-up protection, definite value adapts to the power supply mode in different electrical power direction automatically, it is ensured that the correctness that definite value coordinates, and reduces power failure model
Enclose, accelerate troubleshooting and service restoration.
5. power distribution network cascade switching station intelligent management according to claim 1, it is characterized in that：Fault Isolation and power supply
Recover independent of main website, according to distribution rack once and its power supply relation, form the electrical power distribution automatization system of small range, it is to avoid
Troubleshooting concentrates on main website, and Fault Isolation and service restoration are carried out by distribution terminal autonomous negotiating.
6. power distribution network cascade switching station intelligent management according to claim 1, it is characterized in that：At each failure
Reason terminal is provided with communication server, and all communication servers are connected with distribution main website, detection information and processing
Information is transferred in distribution main website in time.
7. power distribution network cascade switching station intelligent management according to claim 1, it is characterized in that：During system communication failure
Back-up protection can be put into, back-up protection is only between the false voltage inside switching station or between switching station, fault current
Logical relation, integrated use switching station internal logic judges that control, voltage and power direction coordinate on the spot, switching station's node time
Differential technology；It is automatic to calculate, judge, handling and realize that the power supply of Fault Isolation and non-faulting region between level Four cascade switching station is extensive
It is multiple；Simultaneously the voltage collected, electric current, power, the position of the switch, fault message by GPRS transmission to distribution main website, so as to
Carry out the real-time monitoring and analysis of power distribution network；The troubleshooting of switching station and service restoration are communicated independent of GPRS, and GPRS leads to
News are only as data transmission channel.
8. power distribution network cascade switching station intelligent management according to claim 1, it is characterized in that：With reference to first half-wave and zero
The zero-sequence current of all outlets first carries out amplitude com parison on sequence electric current colony amplitude comparison phase comparing method, collection bus, selects to cross and adjusts
It is worth several circuits and carries out 1/4 week wave phase again and compares, if the phase of certain circuit zero-sequence current is different from other circuits, its
For faulty line, if all zero-sequence current same-phases, for bus-bar fault, using the Current Mutual Inductance detected with Weak current
Device, primary current is put into linear transformation at tens milliamperes, and high current speed per hour saturation, exciting current is faint, secondary to export
Milliampere level, it is ensured that gather the accurate of electric current.
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