CN110417123A - One kind being used for intelligent distributed distribution automation terminal - Google Patents
One kind being used for intelligent distributed distribution automation terminal Download PDFInfo
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- CN110417123A CN110417123A CN201910684375.7A CN201910684375A CN110417123A CN 110417123 A CN110417123 A CN 110417123A CN 201910684375 A CN201910684375 A CN 201910684375A CN 110417123 A CN110417123 A CN 110417123A
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- switch
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/261—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations
- H02H7/262—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured involving signal transmission between at least two stations involving transmissions of switching or blocking orders
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
Abstract
The invention belongs to power domains, more particularly to one kind to be used for intelligent distributed distribution automation terminal, be applied to Distributed power route；Distributed power route includes multiple substations, including substation A and substation B, and substation A and B are connected separately with outlet breaker CB1, CB2；Switch 1, switch 2 are also connected in Distributed power route；Block switch 3 switchs；It shakes hands mutually with network interconnecting circuit switch 4；Switch 1, switch 2, switch 3, switch 4 and outlet breaker CB1, CB2 are electrically connected；And switch between can mutually receiving and transmitting signal communicated；Intelligent distributed distribution automation terminal realizes information exchange by adjacent distributions formula distribution automation terminal in high-speed communicating network, with same power supply loop；Intelligent distributed distribution automation terminal further includes faulty positioning device, for positioning the failure in circuit.
Description
Technical field
The invention belongs to circuit fields, are related to a kind of fault location and restoration methods for smart grid, especially have
There is one kind of above-mentioned function for intelligent distributed distribution automation terminal.
Background technique
With the development of electric power network technology, smart grid becomes the hot spot of power industry instantly.Smart grid is exactly electricity
The intelligence of net, it is built upon on the basis of integrated, high-speed bidirectional communication network, passes through advanced sensing and measurement skill
The application of art, advanced equipment and technology, advanced control method and advanced DSS technology, that realizes power grid can
Lean on, safety, economy, it is efficient, environmental-friendly and use safe target, main feature include self-healing, excitation and protection user,
Attack is resisted, provides and meets the power quality of 21 century user demand, the access for allowing various different forms of electricity generation, starting electric power
The optimization efficient operation of market and assets.However, in the prior art, there is also discoveries for positioning and detection for electric network fault
Not in time, disadvantage inefficient, means are complicated, technical solution of the present invention can solve the above problem.
Summary of the invention
The purpose of the present invention is being directed to the above-mentioned problems in the prior art, provide a kind of for intelligent distributed distribution
Automatization terminal.
The technical scheme adopted by the invention is that:
A kind of intelligent distributed distribution automation terminal is applied to Distributed power route route；It is characterized by:
Distributed power route route includes multiple substations, including substation A and substation B, substation A and B difference
It is connected with outlet breaker CB1, CB2；Switch 1, switch 2 are also connected in Distributed power route route；Block switch 3 is opened
It closes；It shakes hands mutually with network interconnecting circuit switch 4；The switch 1, switch 2, switch 3, switch 4 and outlet breaker CB1, CB2 are equal
Electrical connection；And switch between can mutually receiving and transmitting signal communicated；
Further, the intelligent distributed distribution automation terminal is by high-speed communicating network, with same power supply loop
Interior adjacent distributions formula distribution automation terminal realizes information exchange；
Further, intelligent distributed distribution automation terminal further includes faulty positioning device, for positioning in circuit
Failure；
Further, when breaking down on distribution line, before substation exit breaker protection act, quickly event is realized
Hinder restoring electricity for positioning, Fault Isolation and non-faulting region.
When open loop operation, outlet breaker CB1, CB2, switch 1-3 breaker are in closure position, and wherein CB1 band carries
To 4 left side load of switch, CB2 band is loaded onto 4 right side load of switch；
Further, it in power distribution network circuit, breaks down between switch 2 and switch 3, before the failure occurs, In
Outlet breaker CB1, switch 1, there are a predetermined current values between switch 2, when breaking down between switch 2 and switch 3, electricity
Electric current in road changes suddenly, and the substation of point upstream, outlet breaker CB1, switch 1, switch 2 occur for distribution network failure
Fault current feature mutation amount is collected simultaneously.
Further, the substation exit breaker CB1, switch 1, switch 2 of distribution network failure point upstream are mutually notified；Out
Mouth breaker CB1 sends mutually information to switch 1: CB1 detects failure；Meanwhile also having between switch 1 and switch 2 mutually
The information of transmission: switch 1 or switch 2 detect failure；So that being learnt mutually between outlet breaker CB1, switch 1, switch 2
Respectively detect fault-signal, the judgement of switch 2 is out of order the position of generation.
Further, after the position of generation is out of order in judgement, switch 2 notifies switch 1, CB1: switch 1, CB1 are not
Need to trip disconnection, and carries out tripping disconnection by switch 2；Simultaneously as trouble point downstream non-faulty current feature mutation amount, under
It swims and also sends information between first switch 3 and switch 2 mutually, switch 3 sends information to switch 2: switch 3 does not detect event
Barrier；Switch 2 sends information to switch 3: switch 2 detects failure；Switch 2 and 3 can judge out of order specific location.
Further, after the position of generation is out of order in judgement, switch 2 notifies switch 3: switch 2 will first trip,
Enabling switch 3, then delay scheduled duration trips again later.
Further, switch 2 trips, and then, switch 3 has received the message of switch 2, a timer is then opened, in pre-
It trips after timing is long, to disconnect switch, protects rear circuit, complete fault section isolation.
The distributed power grid fault locator runs on the following two kinds mode: (1) power grid open loop operation network protection
Mode；(2) power grid operation with closed ring network protection mode.
When the distributed power grid fault locator runs on (1) power grid open loop operation network protection mode:
System open loop operation, network topology are tree, and the route that fault current flows through is from power supply to fault point
One paths；Fault section must experienced the switch and first of fault current positioned at the last one from power supply to distal direction
Between a switch for not undergoing fault current.
It further, include a plurality of types of switches, regular tap, boundary power switch, tip switch in protection zone；
For in protection zone each be in the switch of closed state, switch meets following condition, is determined as failure end, should trip
Isolated fault:
For regular tap: 1) itself experiences fault current；
2) have in adjacent switch and only one experiences fault current；
For boundary power switch: 1) itself experiences fault current；
2) adjacent switch does not experience fault current；
End is slightly switched: itself experiencing fault current, and crosses stream information without adjacent switch.
Further, the distributed power grid fault locator runs on (2) power grid operation with closed ring network protection mode:
Further, system operation with closed ring, using one switch and its surrounding adjacent switch as research object, according to Kiel
The similar principle of Hough current law, in a node or region, the electric current flowed in and out is equal；For in protection zone
Each be in the switch of closed state, meet following condition, be determined as failure end, should trip isolated fault:
For regular tap:
1) itself experiences fault current；
2) faulty electric current flows into one's respective area, flows out one's respective area without fault current；
For boundary power switch:
1) itself experiences fault current；
2) one's respective area is flowed out without fault current；
Tip is switched: itself experiencing fault current, and adjacent need not cross stream information.
Beneficial effects of the present invention:
(1) each terminal of distribution line realizes each switch testing result using optical fiber ring network group of switches at optical fiber ring network
It is shared by light velocity network communication for information about, realize that coordination and cooperation between each terminal can exchange speed in bold and unconstrained second rank
Rate.
(2) when distribution line breaks down, the breaker quick-break tripping nearest from fault point, simultaneous faults region is adjacent to be opened
Automatic brake separating isolated fault is closed, so that failure influence is limited in minimum zone.
(3) it realizes the nearest breaker quick-break tripping (50-60ms protection exit) of control fault point source side, cuts off failure；
And self-adapting network change in topology, be automatically performed fault section isolation and turn supply.
Detailed description of the invention:
Fig. 1: intelligent distributed power distribution automation structural schematic diagram；
Fig. 2: power network switch connection schematic diagram；
Fig. 3: grid collapses schematic diagram；
Fig. 4: left side breakdown judge schematic diagram；
Fig. 5: left side breakdown judge schematic diagram；
Fig. 6: fault location schematic diagram；
Fig. 7: failure removal schematic diagram；
Fig. 8: Fault Isolation schematic diagram；
Fig. 9: fault-free area restores electricity schematic diagram；
Figure 10: open loop operation current figure；
Figure 11: operation with closed ring current figure.
Specific embodiment:
Clear, complete description is carried out to technical solution of the present invention with reference to the accompanying drawing, it is clear that described embodiment
It is a part of the embodiment of the present invention, instead of all the embodiments.Based on the embodiments of the present invention, ordinary skill people
The every other embodiment that member is obtained without making creative work, belongs to protection scope of the present invention.
Intelligent distributed distribution automation terminal proposed by the present invention, using high-end A8 microprocessor, the reality based on RTEMS
When multiple task operating system develop, the operating system network throughput is strong, and task processing real-time is high.With powerful communication
Managerial ability, provides mutually independent Multi net voting channel and specification is supported, it is more to provide RS-232, RS-485, electrical/optical Ethernet etc.
Kind of communication protocols such as communication interface and IEC60870-5-101/104, IEC61850-MMS, IEC61850-GOOSE, it can be achieved that
The real-time peer to peer interaction of each terminal room communicates, and realizes the fault fast positioning of distribution line, quick isolated fault on the spot, quickly turns
Supply load, the power supply of rapidly self-healing non-faulting area.
As shown in Figure 1, being intelligent distributed electric network composition schematic diagram, including substation A and substation B, substation A
It is connected between substation B by optical fiber ring network.Intelligent distributed power grid is by being in communication with each other between distribution terminal and to present
Line automation (FA), microcomputer protective relay cooperation, control independent of distribution main website, judge fault zone, isolated fault, restore
Non-faulting block supply, and report treatment process and result.The protection of network type interactive information realizes protection rapidity and selection
The perfect unity of property.
Intelligent distributed distribution automation terminal of the invention, including distributed power grid fault locator, application
In on Distributed power route route, the breaker on the distribution line route includes block switch, interconnection switch, and distribution is whole
Information exchange is realized by adjacent distributions formula distribution terminal in high-speed communicating network, with same power supply loop in end, works as distribution line
On break down, before substation exit breaker protection act, realize fast failure positioning, Fault Isolation and non-faulting region
Restore electricity.
Referring to fig. 2, when power distribution network operates normally, CB1, CB2 are substation exit breaker, switch 1, switch 2, switch 3
For section switch, switch 4 is mutually band network interconnecting circuit of shaking hands, and can receive and send messages, be communicated between each other.Work as open loop
When operation, outlet breaker CB1, CB2, switch 1-3 breaker are in closure position, and wherein it is negative to be loaded onto 4 left side of switch for CB1 band
Lotus, CB2 band are loaded onto 4 right side load of switch.
It referring to Fig. 3, in power distribution network circuit, breaks down between switch 2 and switch 3, such as wire short-circuiting, electric leakage,
Or due to equipment damage, line fault etc. in route.
Referring to fig. 4, before the failure occurs, there are a scheduled currents between outlet breaker CB1, switch 1, switch 2
Value, when breaking down between switch 2 and switch 3, the electric current in circuit changes suddenly, and point upstream occurs for distribution network failure
Substation, outlet breaker CB1, switch 1, switch 2 can collect fault current feature mutation amount simultaneously.
Referring to Fig. 5-7, substation exit breaker CB1, switch 1, the switch 2 of distribution network failure point upstream are mutually notified；
CB1 sends mutually information to switch 1: I detects failure.Meanwhile also there is the letter sent mutually between switch 1 and switch 2
Breath: I detects failure.That is CB1, switch 1 are learnt mutually between switch 2 and respectively detect fault-signal, due to switch 2
Positioned at the rightmost side, so, switch 2 is judged, failure necessarily occurs in the back of switch 2, i.e. failure is not located at CB1 certainly, opens
It closes between 1, switch 2, but is located at some position of the right of switch 2；Therefore, after judging result, the notice switch of switch 2
1, CB1: switch 1, CB1 do not need tripping and disconnect, and carry out tripping disconnection by switch 2.Simultaneously as trouble point downstream is without reason
Hinder current characteristic Sudden Changing Rate, also send information between first, downstream switch 3 and switch 2 mutually, switch 3 is sent to switch 2 to be believed
Breath: I does not detect failure；Switch 2 sends information to switch 3: I detects failure.To which switch 2 and 3 can judge
Have: failure is inevitable between switch 2 and switch 3, so that it is determined that failure specific location.Then, switch 2 notifies switch 3: switch
2 will first trip, and enabling switch 3, then delay scheduled duration trips again later.Then switch executes trip operation.The above process
In, detect that the time of failure is less than 100ms.
Referring to Fig. 7-8, the switch 2 of distribution network failure point upstream trips, and then, switch 3 has received the message of switch 2, in
It is to open a timer, trips after scheduled duration, to disconnect switch, protects rear circuit, complete fault zone
Isolation.The Fault Isolation time is less than 200ms.
Referring to Fig. 9, distribution network failure point downstream is shaken hands mutually with interconnection switch 4 because of non-faulty current characteristic value and switch 3
Separating brake decompression, shake hands mutual charged of investment CB2 restore the power supply of 3 downstream non-faulting area of switch, completion non-faulting region self-healing.
Above-mentioned distributed power grid fault locator, because application be based on ad hoc communications network, by the information of each terminal with
Adjacent end Real-Time Sharing realizes protection coordination and the cooperation of Millisecond, is adaptive to the various Connection Modes of intelligent distribution network.
Further, the distributed power grid fault locator can run on following mode: (1) power grid open loop operation net
Network protected mode；(2) power grid operation with closed ring network protection mode.
Power grid open loop operation network protection mode: when system open loop is run, network topology is tree, fault current stream
The route of warp is the paths from power supply to fault point.Fault section must be located at the last one from power supply to distal direction
It experienced between the switch of fault current and the switch that first is not undergone fault current.For the open loop of peer to peer network protection
Mode, main criterion source are the malfunctions of switch itself and its adjacent switch, it may be assumed that the switch of failure end is felt except itself
By overcurrent, only one switch (upstream switch) of adjacent switch can undergo fault current.
It include a plurality of types of switches, regular tap, boundary power switch, tip switch in protection zone.For protection
The switch that each is in closed state in region, switch meet following condition, are determined as failure end, should trip and event is isolated
Barrier:
For regular tap: 1) itself experiences fault current；
2) have in adjacent switch and only one experiences fault current；
For boundary power switch: 1) itself experiences fault current；
2) adjacent switch does not experience fault current；
End is slightly switched: itself experiencing fault current (crossing stream information without adjacent)；
(2) power grid operation with closed ring network protection mode: when system operation with closed ring, with a switch and its surrounding adjacent switch
For research object, flowed in and out according to the principle similar with Kirchhoff's current law (KCL) in a node (or region)
Electric current is equal.In the region composed by a certain switch and switch adjacent thereto, when having a high current from some switch
When flowing into the region, then there must be a high current to flow out the region, it, must if not there is high current from another switch outflow
Faulty point is in the area.
It is in the switch of closed state for each in protection zone, meets following condition, is determined as failure end,
Should trip isolated fault:
For regular tap:
1) itself experiences fault current；
2) faulty electric current flows into one's respective area, flows out one's respective area without fault current；
For boundary power switch:
1) itself experiences fault current；
2) one's respective area is flowed out without fault current；
Tip is switched: itself experiencing fault current (crossing stream information without adjacent)；
The foregoing is only a preferred embodiment of the present invention, is not intended to restrict the invention, for the skill of this field
For art personnel, the invention may be variously modified and varied.All within the spirits and principles of the present invention, made any to repair
Change, equivalent replacement, improvement etc., should all be included in the protection scope of the present invention.
Claims (10)
1. a kind of intelligent distributed distribution automation terminal is applied to Distributed power route；It is characterized by:
Distributed power route includes multiple substations, including substation A and substation B, and substation A and B are connected separately with out
Mouth breaker CB1, CB2；Switch 1, switch 2 are also connected in Distributed power route；Block switch 3 switchs；Mutually band of shaking hands joins
Network killer switch 4；The switch 1, switch 2, switch 3, switch 4 and outlet breaker CB1, CB2 are electrically connected；And it switchs
Between can mutually receiving and transmitting signal communicated；
The intelligent distributed distribution automation terminal is matched by adjacent distributions formula in high-speed communicating network, with same power supply loop
Automation terminal realizes information exchange；
Intelligent distributed distribution automation terminal further includes faulty positioning device, for positioning the failure in circuit；
When breaking down on distribution line, before substation exit breaker protection act, realize fast failure positioning, failure every
It restores electricity from non-faulting region.
2. a kind of intelligent distributed distribution automation terminal according to claim 1, it is characterised in that:
When open loop operation, outlet breaker CB1, CB2, switch 1-3 breaker are in closure position, and wherein CB1 band is loaded onto out
4 left side loads are closed, CB2 band is loaded onto 4 right side load of switch；
In power distribution network circuit, break down between switch 2 and switch 3, before the failure occurs, outlet breaker CB1,
There are a predetermined current values between switch 1, switch 2, and when breaking down between switch 2 and switch 3, the electric current in circuit is unexpected
It changes, the substation of distribution network failure generation point upstream, outlet breaker CB1, switch 1, switch 2 collect failure simultaneously
Current characteristic Sudden Changing Rate.
3. a kind of intelligent distributed distribution automation terminal according to claim 2, it is characterised in that: distribution network failure point
Substation exit breaker CB1, switch 1, the switch 2 of upstream mutually notify；Outlet breaker CB1 sends mutually letter to switch 1
Breath: CB1 detects failure；Meanwhile also having the information sent mutually between switch 1 and switch 2: switch 1 or switch 2 detect
Failure；Respectively detect that fault-signal, switch 2 are sentenced so that learning mutually between outlet breaker CB1, switch 1, switch 2
The position of disconnected generation of being out of order.
4. a kind of intelligent distributed distribution automation terminal according to claim 2, it is characterised in that: be out of order in judgement
After the position of generation, switch 2 notifies switch 1, CB1: switch 1, CB1 do not need tripping and disconnect, and are tripped by switch 2
It disconnects；Simultaneously as trouble point downstream non-faulty current feature mutation amount, between first, downstream switch 3 and switch 2 also mutually
Information is sent, switch 3 sends information to switch 2: switch 3 does not detect failure；Switch 2 sends information: switch 2 to switch 3
Detect failure；Switch 2 and 3 can judge out of order specific location.
5. a kind of intelligent distributed distribution automation terminal according to claim 4, it is characterised in that: be out of order in judgement
After the position of generation, switch 2 notifies switch 3: switch 2 will first trip, after enabling switch 3 then postpone scheduled duration again
Tripping.
6. a kind of intelligent distributed distribution automation terminal according to claim 5, it is characterised in that: switch 2 trips, with
Afterwards, switch 3 has received the message of switch 2, then opens a timer, trips after scheduled duration, to open
It closes, protects rear circuit, complete fault section isolation.
7. a kind of intelligent distributed distribution automation terminal according to claim 1, it is characterised in that: the distributed electrical
Net fault locator runs on the following two kinds mode: (1) power grid open loop operation network protection mode；(2) power grid operation with closed ring
Network protection mode.
8. a kind of intelligent distributed distribution automation terminal according to claim 7, it is characterised in that: the distributed electrical
When net fault locator runs on (1) power grid open loop operation network protection mode:
System open loop operation, network topology are tree, and the route that fault current flows through is one from power supply to fault point
Path；Fault section must be located at the last one from power supply to distal direction experienced fault current switch and first not
Between the switch for undergoing fault current.
9. a kind of intelligent distributed distribution automation terminal according to claim 8, it is characterised in that:
It include a plurality of types of switches, regular tap, boundary power switch, tip switch in protection zone；For protection zone
It is interior each be in the switch of closed state, switch meets following condition, be determined as failure end, should trip isolated fault:
For regular tap: 1) itself experiences fault current；
2) have in adjacent switch and only one experiences fault current；
For boundary power switch: 1) itself experiences fault current；
2) adjacent switch does not experience fault current；
End is slightly switched: itself experiencing fault current, and crosses stream information without adjacent switch.
10. a kind of intelligent distributed distribution automation terminal according to claim 7, it is characterised in that: the distribution
Electric network fault positioning device runs on (2) power grid operation with closed ring network protection mode:
System operation with closed ring, using one switch and its surrounding adjacent switch as research object, according to Kirchhoff's current law (KCL)
Similar principle, in a node or region, the electric current flowed in and out is equal；Each in protection zone is in
The switch of closed state meets following condition, is determined as failure end, and should trip isolated fault:
For regular tap:
1) itself experiences fault current；
2) faulty electric current flows into one's respective area, flows out one's respective area without fault current；
For boundary power switch:
1) itself experiences fault current；
2) one's respective area is flowed out without fault current；
Tip is switched: itself experiencing fault current, and adjacent need not cross stream information.
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| CN110994786A (en) * | 2019-11-12 | 2020-04-10 | 广东电网有限责任公司 | Single intelligent distributed power distribution terminal control method based on peer-to-peer communication |
| CN111049112A (en) * | 2019-12-31 | 2020-04-21 | 江苏联宏智慧能源股份有限公司 | Automatic fault isolation and self-healing control system and method for 10kV looped network distribution line |
| CN112162174A (en) * | 2020-09-03 | 2021-01-01 | 国电南瑞科技股份有限公司 | Distribution room fault positioning method and system based on marketing and distribution integration |
| CN112485707A (en) * | 2020-10-10 | 2021-03-12 | 广西电网有限责任公司电力科学研究院 | Intelligent distributed feeder automatic test circuit |
| CN112636395A (en) * | 2020-12-11 | 2021-04-09 | 珠海市中力电力设备有限公司 | Interactive implementation method for intelligent distributed distribution network automation terminal |
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| CN114221308A (en) * | 2021-12-15 | 2022-03-22 | 南方电网电力科技股份有限公司 | Fault isolation method and device based on distributed intelligent automation terminal |
| CN114243679A (en) * | 2021-11-05 | 2022-03-25 | 南方电网数字电网研究院有限公司 | Multi-service cooperative power distribution method, system and device and digital power distribution terminal |
| CN112162174B (en) * | 2020-09-03 | 2024-04-26 | 国电南瑞科技股份有限公司 | Station area fault positioning method and system based on marketing and distribution integration |
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