CN110148930A - The method of fault location and topology automatic identification in distribution network - Google Patents
The method of fault location and topology automatic identification in distribution network Download PDFInfo
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- CN110148930A CN110148930A CN201910540012.6A CN201910540012A CN110148930A CN 110148930 A CN110148930 A CN 110148930A CN 201910540012 A CN201910540012 A CN 201910540012A CN 110148930 A CN110148930 A CN 110148930A
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- Prior art keywords
- breaker
- function
- fault
- feeder pillar
- topology
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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
-
- 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
-
- 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
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
- H02H7/28—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured for meshed systems
Landscapes
- Locating Faults (AREA)
- Remote Monitoring And Control Of Power-Distribution Networks (AREA)
Abstract
The method of fault location and topology automatic identification in distribution network belongs to distribution automation field in electric system, in particular to the functional configuration of breaker on power grid different location, in the event of a failure automatic positioning isolation, simultaneously automatic identification network topology.By configuring the function of breaker on different location, in the event of a failure, fault point is judged automatically, isolated fault region, meanwhile, according to fault message and breaker actuation, the network topology of automatic identification faulty line.Using the present invention, the judgement and isolation of fault point do not depend on known distribution network topology, while judging fault point, it can be deduced that network topology structure relevant to failure path provides condition for breakdown maintenance, accident analysis.
Description
Technical field
The invention belongs to distribution automation fields in electric system, in particular to breaker on low-voltage network different location
Functional configuration, and automatic positioning isolation, simultaneously automatic identification network topology when breaking down.
Background technique
Requirement with society to power supply quality is higher and higher, and distribution system is also further perfect.It can in order to improve power supply
By property, generally realize that fault fast positioning, isolation and non-faulting area restore to supply automatically by the intercommunication of distribution terminal
Electricity.
The variation of controller switching equipment will lead to the change of platform area distribution network topological relation in power distribution network, especially match in low pressure
In power grid, often increase feeder pillar, cause topology in low-voltage network unclear, fault automatic location isolation is difficult.It realizes at present
There are many method of automated topology, but input cost, O&M cost are excessively high limits the application of technology.
Effectively fault location and Fault Isolation depend on the topological structure it is known that distribution network, how to overcome this
Dependence, currently without finding effective method.
Summary of the invention
In order to when failure occurs, can effectively fault location, Fault Isolation, and generated according to fault message occur therefore
The topology of the low-voltage network of barrier, proposes the present invention.
To achieve the goals above, the invention adopts the following technical scheme: in distribution network fault location method, it is described
In distribution network, breaker is arranged close to the cable point of other positions on the first order comprehensive distribution box and distribution network of power supply
In branch case.
Communication control terminal is configured in distribution box and feeder pillar, communication control terminal obtains this distribution box or feeder pillar
The state of middle breaker, communication control terminal and host computer have communication connection, and the state of breaker passes through in communication control terminal
It is transmitted to host computer.
Breaker investment function include:
A-1, overcurrent delay trip avoidance function: detect that electric current is more than tripping after delay T1 after overcurrent setting value.
B-1, overcurrent decompression trip avoidance function: breaker detects route over current fault, route in the case where having pressure and coincidence state
After flowing without pressure, other breakers into this feeder pillar send locking trip signal, circuit breaker trip after the T4 that is delayed.
Closing function when B-2, source side have calendering: when breaker quartile state, source side is to have pressure by no buckling, through short
The T5 that is delayed closes a floodgate later；Over current fault is not detected after combined floodgate within the T3 time, then is latched acceleration function after combined floodgate.
Acceleration function after B-3, combined floodgate: breaker quartile and without stream, overcurrent is detected after breaker closing within T3 therefore
Hinder no-delay tripping.
B-4, source side decompression trip avoidance function: after source side decompression, if not received within the T4 time other in this feeder pillar
The locking trip signal that breaker is sent, then circuit breaker trip；If receiving other breaker hairs in this feeder pillar within the T4 time
The locking trip signal come, then breaker is failure to actuate.
B-5, residual voltage perceptional function: when breaker quartile, source side occurs being greater than the voltage of residual voltage definite value, and duration
Residual pressure signal less than T5 then sends residual voltage perception information.
Preferably, the breaker in distribution box puts into function A-1, and the breaker in feeder pillar puts into function B-1 to B-5.
Based on above-mentioned configuration, communication control terminal sends the movement of breaker and the fault message detected to upper
Machine, realize fault location, the Fault Locating Method the following steps are included:
Step 1-1, when occurring over current fault on distribution network, breaker that power supply point is flowed through to electric current faulty between fault point
Detect over current fault.
Step 1-2, the breaker that over current fault is detected in distribution box trips according to A-1 function.
Step 1-3, the breaker that over current fault is detected in feeder pillar trips according to B-1 function.
Step 1-4, the breaker of source side decompression is detected, if there is no detect over current fault in the feeder pillar of place
Breaker, then by B-4 function trip；If there is the breaker for detecting over current fault in the feeder pillar of place, due to step
1-3 receives locking trip signal, is failure to actuate.
Step 1-5, the breaker to trip in PC control distribution box closes a floodgate after the T2 time of tripping.
Step 1-6, each circuit breaker electric source in the next stage feeder pillar of combined floodgate breaker has pressure,
By the breaker of function B-1 tripping in feeder pillar, close a floodgate by function B-2；
By the breaker of function B-4 tripping in feeder pillar, close a floodgate by function B-2；
Step 1-6 is repeated, until fault point upper level feeder pillar.
Step 1-7, it in fault point upper level feeder pillar, is pressed after step 1-6 combined floodgate by the breaker that function B-1 trips
The no-delay tripping of function B-3.
Step 1-8, due to the breaker closing in step 1-7 to failure, the next stage breaker of the breaker, by function
B-5 detects route residual voltage.
Based on the above process, the automatic identification of topology is completed, is included the following steps.
Step 2-1, host computer storage power supply and comprehensive distribution box are initial topology figure.
Step 2-2, after the information for receiving step 1-1 transmission, the breaker that over current fault is detected in feeder pillar is added
Into topological diagram, the breaker does not have connection relationship in topological diagram.
Step 2-3, the information sent according to the step 1-2 to 1-4 received adds the open circuit of trip operation in topology
Device.
Step 2-4, secondary through the closing time of step 1-6 according to the breaker for respectively detecting over current fault after step 1-5
Sequence obtains each breaker connection relationship that decompression trips after detecting over current fault in step 2-3, i.e. fault point upstream failure
Line topological.
Step 2-5, the residual voltage perception information sent according to the step 1-8 received, confirmly detects the breaker of residual voltage i.e.
For fault point junior breaker.
The present invention, the breaker of different location put into different functions, and when over current fault occurs, breaker is according to investment
Function difference has different movements respectively, and circuit-breaker status and movement are uploaded.Breaker is according to itself logic judgment
Fault point, isolated fault region obtain the topology knot of faulty line by the movement of breaker after fault message and combined floodgate
Structure.
The utility model has the advantages that the judgement and isolation of fault point do not depend on known distribution network topology, in network using the present invention
It is especially suitable in the case where topological often variation.While judging fault point, it can be deduced that network relevant to failure path
Topological structure provides condition for breakdown maintenance, accident analysis.
Detailed description of the invention
Fig. 1, Fig. 2 are the topological diagram of low voltage power distribution network,
Fig. 3 is over current fault point schematic diagram,
Fig. 4-Figure 10 is the process schematic for automatically generating topology.
Wherein, 1: communication control terminal, 1-0 is to 7-0: incoming switch, 1-1 to 1-4,2-1 to 2-4,3-1 to 3-4,4-1
To 4-4,5-1 to 5-4,6-1 to 6-4,7-1 to 7-4: breaker.
Specific embodiment
The following examples are realized in low voltage power distribution network.
Time setting: above-mentioned T1-T5 is configured according to specific requirement, the setting range (unit s, second) of each time:
T1=0.1-0.4s, T2=10-20s, T3=3-6s, T4=2-4s, T5=5-10s.
The present invention will be further described with reference to the accompanying drawing.
Referring to Fig. 1, Fig. 2, what is be most recently connected with source side is a low-voltage comprehensive distribution box, and other is cable branch box,
In the present embodiment, in each cable branch box, there is 1 incoming switch in end of incoming cables, and leading-out terminal has 4 breakers.
In the application, distribution box refers exclusively to the first order low-voltage comprehensive distribution box close to source side, and feeder pillar refers to other positions
On cable branch box.
Configuration instruction: 1-1 to 1-4 is the breaker being placed in inside comprehensive distribution box, and 2-1 to 2-4,3-1 to 3-4,4-1 are arrived
4-4,5-1 to 5-4,6-1 to 6-4,7-1 to 7-4 are the breaker being placed in inside cable branch box, and breaker can be with disengagement failure
Electric current.
Each comprehensive distribution box and cable branch box configure communication control terminal 1.
Breaker configures intelligent terminal, and terminal acquires the three-phase current and source side three-phase voltage for flowing through breaker, inspection
Circuit-breaker status is surveyed, the movement of breaker is controlled, completes the control logic of breaker.
In the present invention, intelligent terminal is realized using two kinds of configuration modes:
1, breaker control terminal (not marking in figure) acquisition flows through the three-phase current and source side three-phase voltage of breaker, inspection
Survey line line state controls the movement of breaker, completes the control logic of breaker；Breaker control terminal is logical by certain mode
Acquisition or the signal generated are transmitted to communication control terminal by news, such as bus, Ethernet.This mode, control and communication pass through
Two functional modules are completed.
2, the acquisition of communication control terminal flows through the three-phase current and source side three-phase voltage of breaker, detects route shape
State, controls the movement of breaker, and completes the control logic of breaker in this distribution box or feeder pillar.This mode, communication control
All breakers in this distribution box of terminal control or feeder pillar processed, control and communication are completed by communication control terminal.
Communication control terminal 1 is transmitted to acquisition or the signal generated by modes such as LORA, optical cable, power line carriers
Position machine.
Breaker control terminal (not marking in figure) or communication control terminal 1 form intelligent breaker together with breaker.
Intelligent breaker acquisition flow through breaker three-phase current and source side three-phase voltage, have detection failure,
Closing function, residual voltage perceptional function etc. when opening and closing state, route accelerate after having pressure, route decompression, combined floodgate, source side has calendering
Signal is transmitted to host computer by modes such as carrier wave, LORA, wireless public network, optical fiber through communication control terminal 1.
Herein hereinafter, " breaker " refers to " intelligent breaker ".
In order to save cost, 1-0,2-0,3-0,4-0,5-0,6-0,7-0 do not use breaker, can be no electronic behaviour
Make mechanism, only has the switch of manual opening-closing function.
Host computer is cloud main website, as shown in Figure 1, either with the mist terminal of edge calculations ability, as shown in Figure 2.
In Fig. 2, the mist terminal with edge calculations ability is arranged in low-voltage comprehensive distribution box.
Mist terminal with edge calculations ability is local intelligent equipment, handles the data under this transformer, completes failure
Positioning, Fault Isolation, automated topology identification.
The clock synchronization module and host computer time synchronization system of each communication control terminal guarantee the consistency of whole system time.
There is backup power supply in comprehensive distribution box and cable branch box, failure can be believed in the short time after guarantee fault outage
Breath, state displacement upload, and can be with cut-off breaker after power failure.
The function of breaker investment.
According to present position difference, the function of breaker investment is also different.In the present invention, it is located at comprehensive distribution box and cable
Breaker in feeder pillar puts into different functions.
Comprehensive distribution box inner breaker investment function include:
A-1, overcurrent delay trip avoidance function: detect that electric current is more than tripping after delay T1 after overcurrent setting value.
Overcurrent setting value is determined according to live load.If live load is up to 10A, then overcurrent setting value can be set to
12A。
Feeder pillar inner breaker investment function include:
B-1, overcurrent decompression trip avoidance function: breaker detects route over current fault in the case where having pressure and coincidence state, and route is without stream
After pressure, other breakers into this feeder pillar send locking trip signal, circuit breaker trip after the T4 that is delayed.
Closing function when B-2, source side have calendering: when breaker quartile state, source side is to have pressure by no buckling, through short
The T5 that is delayed closes a floodgate later；Over current fault is not detected after combined floodgate within the T3 time, then is latched acceleration function after combined floodgate.
Acceleration function after B-3, combined floodgate: breaker quartile and without stream, overcurrent is detected after breaker closing within T3 therefore
Hinder no-delay tripping.
B-4, source side decompression trip avoidance function: after source side decompression, if not received within the T4 time other in this feeder pillar
The locking trip signal that breaker is sent, then circuit breaker trip；If receiving other breaker hairs in this feeder pillar within the T4 time
The locking trip signal come, then breaker is failure to actuate.
B-5, residual voltage perceptional function: when breaker quartile, source side occurs being greater than the voltage of residual voltage definite value, and duration
Residual pressure signal less than T5 then sends residual voltage perception information.
In function B-5, residual voltage definite value is the 30% of specified phase voltage.If the specified phase voltage of low voltage power distribution network is 220V,
Residual voltage definite value is 66V.
In the present embodiment, the time difference for putting into function is as follows:
T1=0.2s, T2=15s, T3=5s, T4=3s, T5=7s.
The function of above-mentioned breaker investment, can be directly by host computer according to the information received, and control breaker is realized,
This needs reliable communication to ensure；It can also be realized in local by breaker control terminal or communication control terminal.
Fault Isolation.
It is put into according to above functions, when detecting over current fault on low-voltage distribution wire road, by between each breaker
Coordination completes localization of fault and isolation.
Referring to Fig. 3, fault point is in breaker 4-3 rear end K point for embodiment.
Step 1-1, as shown in figure 3, when illustrating K point generation short trouble, power supply point to the breaker between fault point
1-1,2-3,4-3 can detect over current fault, and remember fault message.
Step 1-2, the breaker 1-1 in distribution box is tripped due to overcurrent delay, is tripped after over current fault after T1.
Step 1-3, breaker 2-3,4-3 in feeder pillar trips according to function B-1.
Step 1-4, since breaker 1-1 trips, the circuit breaker electric source in cable branch box 1,3,4,5,6 is caused to lose
Pressure.
In feeder pillar 4,5,6, due to there is no breaker to detect over current fault, according to function B-4, breaker 5-1 to 5-4
Tripping, breaker 6-1 to 6-4 tripping, breaker 7-1 to 7-4 tripping.
In feeder pillar 1, since breaker 2-3 is according to function B-1, locking tripping letter is sent to breaker 2-1,2-2,2-4
Number, breaker 2-1,2-2,2-4 are not acted according to function B-4.
Equally, in feeder pillar 3, breaker 4-1,4-2,4-4 are not acted.
Above-mentioned steps complete the trip operation after failure.
Below step complete fault point positioning be isolated.
Step 1-5, host computer knows the breaker 1-1 in distribution box since over current fault trips, in its tripping T2 time
Afterwards, control breaker 1-1 closes a floodgate.
In feeder pillar 1: step 1-6, breaker 1-1 closes a floodgate, and the circuit breaker electric source in feeder pillar 1 has pressure.Breaker 2-3
It trips in step 1-3, so close a floodgate by function B-2, other breakers, 2-1,2-2,2-4, due to being latched separating brake, nothing
Movement, restores electricity.
In feeder pillar 5: step 1-6, circuit breaker electric source has pressure, and breaker 6-1 to 6-4 closes a floodgate, restores electricity.
In feeder pillar 3: after step 1-6, breaker 2-3 closes a floodgate, the circuit breaker electric source in feeder pillar 3 has pressure.Breaker
4-3 trips in step 1-3, closes a floodgate by function B-2, other breakers, 4-1,4-2,4-4, due to being latched separating brake, without dynamic
Make, restores electricity.
In feeder pillar 6: step 1-6, circuit breaker electric source has pressure, and breaker 7-1 to 7-4 closes a floodgate, restores electricity.
Step 1-7, after breaker 4-3 closes a floodgate, since close to fault point, breaker 4-3 closes a floodgate to failure, breaker 4-3
No-delay tripping.
Step 1-8, breaker 5-1,5-2,5-3,5-4 in feeder pillar 4 trip in step 1-4, are in quartile state；
Failure is detected within the T3 time after closing a floodgate due to breaker 4-3, according to function B-3 Accelerated trip, breaker 5-1,5-2,5-
3,5-4 can detecte residual voltage information by function B-5, send residual voltage perception information.
The no-delay tripping of failure is detected within the T3 time after closing a floodgate due to breaker 4-3, in breaker 1-1 delay T1 knot
Before beam, fault current has been returned, and breaker 1-1 will not trip according to function A-1.
Since breaker 4-3 is together in failure, although breaker 2-3 detected stream information, due to there is no decompression so
It will not trip, after short delay, overcurrent remembers involution.
Breaker 4-3 tripping, breaker 5-1 to 5-4 trip in step 1-4 decompression, and fault zone has been isolated.
Through above-mentioned steps, fault point is isolated from low voltage power distribution network, while non-faulting region has been restored to supply
Electricity.
Topology automatic identification.
Host computer is automatically performed topological identification according to the information received in process of fault isolation.
Referring to Fig. 3, fault point is in breaker 4-3 rear end K point for embodiment.
Step 2-1, due to the variability of rack, the complexity of power distribution network cannot in host computer (cloud main website or mist terminal)
Obtain full mesh topology.In the present invention, host computer does not store rack whole topological structure.Low-voltage comprehensive distribution box is nearest away from power supply,
Substantially connection variation will not occur, therefore, in host computer only store the low-voltage comprehensive distribution box after power supply, such as Fig. 4.
Step 2-2, step 1-1, all breakers for detecting over current fault, i.e. breaker 1-1,2-3,4-3 are by information
It uploads；After host computer receives the information of step 1-1 transmission, the breaker of over current fault, breaker 2- will be detected in feeder pillar
3,4-3 is added in topological diagram, since failure occurs simultaneously substantially, cannot get the relationship between superior and subordinate of breaker at this time, described disconnected
Road device does not have connection relationship in topological diagram, as shown in Figure 5.
Step 2-3, step 1-2 is into 1-4, breaker 5-1 to 5-4 tripping, breaker 6-1 to 6-4 tripping, breaker 7-
1 to 7-4 trips, and the breaker of trip operation is added in topology.Equally, it not can determine that the relationship between superior and subordinate of breaker at this time,
As shown in Figure 6.
In figure, breaker 6-1 to 6-4, breaker 7-1 to 7-4 are not marked, reason is being explained herein below.
Step 2-4, after step 1-5, breaker 1-1 closes a floodgate, in step 1-6, after breaker 2-3 source side has the short delay of pressure
It closes a floodgate, breaker 2-3 can be differentiated in the junior of breaker 1-1；Breaker 6-1 to 6-4 closes a floodgate, but can not judge breaker 6-
1 to 6-4 is positioned at the junior of which breaker in feeder pillar 1, and host computer can not identify network topology, therefore, in topological diagram
Do not increase breaker 6-1 to 6-4, updates topology such as Fig. 7.
After breaker 2-3 closes a floodgate, future time, in step 1-6, breaker 4-3 source side closes a floodgate after having the short delay of pressure, on
Position machine can differentiate breaker 4-3 in the junior of breaker 2-3；Breaker 7-1 to 7-4 closes a floodgate, but can not judge breaker 7-1
To the junior that 7-4 is positioned at which breaker in feeder pillar 3, host computer can not identify network topology, therefore, in topological diagram not
Increase breaker 7-1 to 7-4, updates topology such as Fig. 8.
Step 2-5, failure is detected within the T3 time after closing a floodgate due to breaker 4-3, and in step 1-8, breaker 5-1 is arrived
5-4 can detect residual voltage, according to residual voltage perception information, update topology such as Fig. 9.
Host computer leads to the combined floodgate information during trip operation and positioning failure according to over current fault information, failure,
The relevant breaker topological relation of failure has finally automatically generated the related all breaker topological relations of failure through constantly updating.
The topological relation of breaker is determining in feeder pillar, in feeder pillar 1, the topological relation of breaker 2-1 to 2-4
It is bound with feeder pillar 1, relevant information can obtain from assets encoded information, obtain the information of one of breaker, just obtain
Can entire feeder pillar information.
Step 2-6, the topological relation of each feeder pillar of communication control terminal storage in feeder pillar is uploaded to by communication
Position machine, host computer improve faulty line network topology according to configuration information.
Finally, topology such as Figure 10 are updated.
It can be with fault point, in the present embodiment, in feeder pillar 3 and 4 middle section K of feeder pillar according to this topological relation
Point.
According to the topological structure that identification is completed, accident analysis positioning is realized, fault point is sent out according to GPS position information
It send the specific location of fault point to repair personnel, realizes that rapid rush-repair restores electricity.
After the completion of troubleshooting, cloud main website automatically generates failure final report, comprising faulty line topology, accident analysis,
The message such as troubleshooting, failure summary, trouble-saving.
Incoming switch 1-0,2-0,3-0,4-0,5-0,6-0,7-0 are not involved in logic control movement, in order to keep complete, open up
It flutters in figure and retains above-mentioned diagram.
By the isolation of a fault point, the topology of available fault branch route.With the propulsion of time, low pressure is matched
Fault point is increasing in electric network, and the topology that host computer saves can be improved Global Topological, be finally obtained by continuous iteration
The Global Topological of entire low voltage power distribution network.
In Fig. 3, if broken down behind breaker 4-2, the topology of available feeder pillar 3, feeder pillar 6.
If broken down behind breaker 2-1, the topology of available breaker 1-1, feeder pillar 1, feeder pillar 5.
If broken down behind breaker 3-4, the topology of available breaker 1-4, feeder pillar 2 and next stage.
The continuous iteration above process, so that it may obtain the topological diagram of the entire low voltage power distribution network of Fig. 1 or Fig. 2.
Although the application in above-described embodiment is low voltage power distribution network, method proposed by the present invention is also applied for
Middle high-pressure distribution network.
Claims (10)
1. the method for fault location in distribution network, in the distribution network, the first order that breaker is arranged close to power supply is comprehensive
It closes on distribution box and distribution network in the cable branch box of other positions, it is characterised in that:
Communication control terminal is configured in distribution box and feeder pillar, communication control terminal obtains this distribution box or feeder pillar interrupts
The state of road device, communication control terminal and host computer have communication connection, and the state of breaker is uploaded to by communication control terminal
Host computer；
Breaker investment function include:
A-1, overcurrent delay trip avoidance function: detect that electric current is more than tripping after delay T1 after overcurrent setting value；
B-1, overcurrent decompression trip avoidance function: breaker detects route over current fault in the case where having pressure and coincidence state, and route is without stream
After pressure, other breakers into this feeder pillar send locking trip signal, circuit breaker trip after the T4 that is delayed；
Closing function when B-2, source side have calendering: when breaker quartile state, source side is to have pressure by no buckling, through short delay
It closes a floodgate after T5；Over current fault is not detected after combined floodgate within the T3 time, then is latched acceleration function after combined floodgate；
Acceleration function after B-3, combined floodgate: breaker quartile and without stream, detected within T3 after breaker closing over current fault without
Delay tripping；
B-4, source side decompression trip avoidance function: after source side decompression, if not receiving other open circuits in this feeder pillar within the T4 time
The locking trip signal that device is sent, then circuit breaker trip；If receiving what other breakers in this feeder pillar were sent within the T4 time
It is latched trip signal, then breaker is failure to actuate；
B-5, residual voltage perceptional function: when breaker quartile, source side occurs being greater than the voltage of residual voltage definite value, and the duration is less than
The residual pressure signal of T5 then sends residual voltage perception information；
The Fault Locating Method the following steps are included:
Step 1-1, when occurring over current fault on distribution network, breaker that power supply point is flowed through to electric current faulty between fault point
Detect over current fault；
Step 1-2, the breaker that over current fault is detected in distribution box trips according to A-1 function；
Step 1-3, the breaker that over current fault is detected in feeder pillar trips according to B-1 function；
Step 1-4, the breaker of source side decompression is detected, if there is no detect the disconnected of over current fault in the feeder pillar of place
Road device then trips by B-4 function；If there is the breaker for detecting over current fault in the feeder pillar of place, since step 1-3 is received
To locking trip signal, it is failure to actuate；
Step 1-5, the breaker to trip in PC control distribution box closes a floodgate after the T2 time of tripping；
Step 1-6, each circuit breaker electric source in the next stage feeder pillar of combined floodgate breaker has pressure,
By the breaker of function B-1 tripping in feeder pillar, close a floodgate by function B-2；
By the breaker of function B-4 tripping in feeder pillar, close a floodgate by function B-2；
Step 1-6 is repeated, until fault point upper level feeder pillar；
Step 1-7, in fault point upper level feeder pillar, by the breaker that function B-1 trips, after step 1-6 combined floodgate, by function
The no-delay tripping of B-3；
Step 1-8, due to the breaker closing in step 1-7 to failure, the next stage breaker of the breaker, by function B-5
Detect route residual voltage.
2. the method for fault location according to claim 1, it is characterised in that: the distribution network is low-voltage network
Network.
3. the method for fault location according to claim 1, it is characterised in that: breaker configures breaker control terminal,
The acquisition of breaker control terminal flows through the three-phase current of breaker and the three-phase voltage of circuit breaker electric source, and completes breaker
Control logic；Breaker control terminal connection communication controlling terminal.
4. the method for fault location according to claim 1, it is characterised in that: the acquisition of communication control terminal flows through breaker
Three-phase current and circuit breaker electric source three-phase voltage, and complete the control logic of breaker in this distribution box or feeder pillar.
5. the method for fault location according to claim 1, it is characterised in that: the host computer is cloud main website or has side
The mist terminal of edge computing capability.
6. the method for fault location according to claim 1, it is characterised in that:
Breaker in distribution box puts into function A-1, and the breaker in feeder pillar puts into function B-1 to B-5.
7. the method for fault location according to claim 3 or 4, it is characterised in that:
The function of breaker investment realized by host computer, or
The function of the breaker investment is realized by breaker control terminal or communication control terminal.
8. the method for topology automatic identification, by host computer based on the information realization uploaded in claim 1, which is characterized in that institute
The method for stating topology automatic identification have the following steps are included:
Step 2-1, host computer storage power supply and comprehensive distribution box are initial topology figure；
Step 2-2, after the information for receiving step 1-1 transmission, the breaker that over current fault is detected in feeder pillar is added to and is opened up
It flutters in figure, the breaker does not have connection relationship in topological diagram；
Step 2-3, the information sent according to the step 1-2 to 1-4 received adds the breaker of trip operation in topology；
Step 2-4, it after step 1-5, according to the breaker for respectively detecting over current fault through the closing time order of step 1-6, obtains
Each breaker connection relationship that decompression trips after over current fault, i.e. fault point upstream failure route are detected in step 2-3 out
Topology；
Step 2-5, the residual voltage perception information sent according to the step 1-8 received, the breaker for confirmly detecting residual voltage is event
Zhang Dian junior breaker.
9. according to the method described in claim 8, it is characterized by: the method for the topology automatic identification further includes following step
It is rapid:
Step 2-6, the breaker configuration information of each feeder pillar of communication control terminal storage in feeder pillar is uploaded to by communication
Host computer, host computer improve faulty line network topology according to configuration information.
10. method according to claim 8 or claim 9, it is characterised in that: by the Fault Isolation of distribution network different location,
Construct the topology of entire distribution network.
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