CN106385013B - The fault location shielding system and its working method of the adaptive power distribution network method of operation - Google Patents
The fault location shielding system and its working method of the adaptive power distribution network method of operation Download PDFInfo
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- CN106385013B CN106385013B CN201610874220.6A CN201610874220A CN106385013B CN 106385013 B CN106385013 B CN 106385013B CN 201610874220 A CN201610874220 A CN 201610874220A CN 106385013 B CN106385013 B CN 106385013B
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- 238000000034 method Methods 0.000 title claims abstract description 42
- 230000003044 adaptive effect Effects 0.000 title claims abstract description 22
- 238000002955 isolation Methods 0.000 claims abstract description 25
- 230000009471 action Effects 0.000 claims abstract description 13
- 238000011144 upstream manufacturing Methods 0.000 claims description 50
- 238000004891 communication Methods 0.000 claims description 24
- 238000001514 detection method Methods 0.000 claims description 20
- 230000008054 signal transmission Effects 0.000 claims description 8
- 238000012545 processing Methods 0.000 claims description 2
- 230000004044 response Effects 0.000 abstract description 8
- 238000013024 troubleshooting Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 6
- 230000004224 protection Effects 0.000 description 6
- 230000005611 electricity Effects 0.000 description 5
- 230000015556 catabolic process Effects 0.000 description 4
- 230000008569 process Effects 0.000 description 4
- 230000004888 barrier function Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 230000003993 interaction Effects 0.000 description 2
- 230000000116 mitigating effect Effects 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000003745 diagnosis Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000007257 malfunction Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 238000007363 ring formation reaction Methods 0.000 description 1
- 230000002123 temporal effect Effects 0.000 description 1
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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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Abstract
A kind of the fault location shielding system and its working method of the adaptive power distribution network method of operation.It is related to the technical field of system for distribution network of power automation more particularly to a kind of the fault location shielding system and its working method of the adaptive power distribution network method of operation.Radial pattern, the hand in hand simple rack such as looped network can not only be coped with by providing one kind, network-like complicated rack can also be coped with, and troubleshooting and the fast response time of all methods of operation within the scope of adaptive rack, stability is high, the fault location shielding system and its working method of the adaptive power distribution network method of operation of accurate positioning.The intelligent terminal includes that logical operation module, logic judgment module, instruction module and isolation action module, the logical operation module are separately connected by analog-digital converter and voltage sensor, current sensor, and the isolation action module connects disconnecting switch.Degree of freedom of the present invention is high, and the scope of application is big.
Description
Technical field
The present invention relates to the technical field of system for distribution network of power automation more particularly to a kind of adaptive distribution network operation sides
The fault location shielding system and its working method of formula.
Background technology
Feeder automation (FA, FeederAutomation) refers to utilizing automation equipment or system monitoring distribution line
Operation conditions, find line fault in time, be diagnosed to be fault section rapidly and fault section is isolated, and restore to non-faulting
The power supply in section.
Distribution network line protect with the protections of power grids circuits have larger difference, especially mesolow distribution line and
Transmission line of electricity is compared, and distance is shorter between usual two switch（Usually not more than 1km）, the fault current of sections different in this way is poor
Different very little can be ignored, according to fault current it is differential come realize route protection obviously can not possibly；From temporal cooperation
For, since the number of switches of one feeder line of distribution is more, but it is 0 that substation exit switch, which usually adjusts failure Outlet time,
Even if will lengthen the time, in order to protect station in equipment, will not adjust more than 500ms, also be difficult to reality in time in this way
Existing multistage cooperation.
Therefore, the route protection of distribution be difficult to adopt cascaded coordination in route protection mode complete fault section every
From.FEEDER AUTOMATION is mainly sequentially overlapped in Current Distribution Automation using centralization FEEDER AUTOMATION or on the spot.
Centralized FEEDER AUTOMATION is that the failure relevant information in a region is uploaded to main website or substation, by main website or substation
Fault diagnosis is carried out, and then completes troubleshooting；On the spot sequence overlap FEEDER AUTOMATION be using voltage or electric current and when
Between coordinated, multiple switch coincidence by way of complete troubleshooting.Centralized FEEDER AUTOMATION is limited by region
Scale, real-time influences power supply reliability as area's device within the domain increases and has a greatly reduced quality；On the spot sequence coincidence system with when
Between and non-faulting region power failure, or even using repeatedly overlap impact system be cost completion failure isolation, equally affect confession
The real-time of electricity, safety and reliability.
Peer-to-peer communications realize troubleshooting between terminal of the intelligent distribution type feeder automation technology based on adjacent switch, but
Seek a kind of fault location suitable for complicated rack under the various methods of operation, is still currently to solve the problems, such as.
An application for a patent for invention disclosed in State Intellectual Property Office 2015-2-18（Application number：2014106386640, name
Claim：Utilization orientation element improves the Fault Section Location of Distribution Network containing distributed generation resource）Specifically disclose a kind of utilization side
The Fault Section Location of Distribution Network containing distributed generation resource is improved to element, including：Step 1：Distribution containing distributed generation resource
After net breaks down, according to switching the fault current direction reported around fault point, failure judgement is happened at T and connects region or not
Other regions connect containing T；Step 2：If the directional element reporting fault directional information for providing fault current side by main power source is
Positive direction, and the directional element reporting fault directional information that fault current side is provided by distributed generation resource is negative direction, accordingly
Failure judgement is happened at T and connects region, to isolated fault；Step 3：If the fault current that the feeder switch around fault point provides
Directional information is identical, then failure judgement is happened at other regions connect without T；Due to the fault current width of fault point both sides switch
Value is different, and the fault current size of the switch experience of fault point side is approximately the same, may determine that generation of being out of order accordingly
Specific section simultaneously carries out Fault Isolation.But there are following defects for this mode：1）Only there are one main power source, T nodes in network
Introduce completely to help to differentiate the breakdown judge after distributed generation resource access, it is meant that open loop operation+distribution can only be handled
The situation of formula power supply；2）It is clear that provide fault current by main power source be positive direction, this mode be in simple topology it is feasible,
But in more complex looped network, guilty culprit can not be judged according to its failure criterion.So the program can only be only capable of enough replies
Simple list main power source+distributed-power mode；The failure of " ring-type " network topology can not be navigated to, can not be adapted to more and more multiple
Miscellaneous power grid architecture.
An application for a patent for invention disclosed in State Intellectual Property Office 2016-4-20（Application number 201610021123.2, name
Claim：A kind of intelligent distribution network distributed fault detection method）Specifically disclose a kind of intelligent distribution network distributed fault detection side
Method, including：Determine the protection domain of each Intelligent power distribution terminal；Each Intelligent power distribution terminal is logical with adjacent Intelligent power distribution terminal equity
Letter, the network topology information of the respective position of interaction；Intelligent power distribution terminal is according to the adjacent intelligent power distribution got
The fault message that terminal is calculated judges abort situation based on region longitudinal comparison protection philosophy；Determine abort situation institute
Circuit after, corresponding with circuit switchtype is determined according to network topology structure, phase is made according to switchtype
The Fault Isolation Strategy answered.Advantageous effect of the present invention：Intelligent power distribution terminal can be according to current network topology structure and adjacent intelligence
Energy distribution terminal peer to peer interaction fault message is realized and the accurate and effective of fault zone is isolated, meets intelligent distribution network to failure
Rapidity, flexibility and the reliability requirement for detecting and being isolated.But it needs to carry out each switch in positioning isolation processes
It numbers and its current direction is oriented, algorithm Complex Response is slow, only copes with simple single main power source+distributed generation resource
Pattern；The failure of " ring-type " network topology can not be navigated to, however it remains asking for the power grid architecture to become increasingly complex can not be adapted to
Topic.
Invention content
The present invention can not only cope with radial pattern, the hand in hand simple rack such as looped network in view of the above problems, providing one kind, also
Network-like complicated rack, and troubleshooting and the response speed of all methods of operation within the scope of adaptive rack can be coped with
Soon, stability is high, the fault location shielding system and its working method of the adaptive power distribution network method of operation of accurate positioning.
The technical scheme is that：A kind of fault location shielding system of the adaptive power distribution network method of operation, including electricity
Net busbar, is equipped with several switches on power grid busbar, and each switch is equipped with voltage sensor, current sensor and intelligence
Terminal, the voltage sensor and current sensor are connected by analog-digital converter with the intelligent terminal；
Signal transmission module is equipped between the adjacent intelligent terminal, for the peer-to-peer communications between adjacent intelligent object；
Disconnecting switch is additionally provided in the switch, the disconnecting switch is connect with the intelligent terminal, the disconnecting switch
Switch for isolated fault.
The intelligent terminal includes logical operation module, logic judgment module, instruction module and action module is isolated, described
Logical operation module is separately connected by analog-digital converter and voltage sensor, current sensor, and the logical operation module is patrolled
It collects judgment module, instruction module, isolation action module to be sequentially connected, the isolation action module connects disconnecting switch.
Described instruction module is connect by the signal transmission module with adjacent instruction module.
A kind of working method of the fault location shielding system of the adaptive power distribution network method of operation, works as follows：
1）Voltage, the current signal of voltage sensor and current sensor acquisition switch are sent by analog-digital converter to intelligence
Terminal processes；
2）Intelligent terminal judges switch over-current information, power direction, on off state, and is sent to the terminal of adjacent switch；
3）Intelligent terminal judge this switch whether failure, 5 are gone to step if failure）, step 4 is gone to if not failure）；
4）Judge adjacent switch whether failure；
5）Abort situation judgement is carried out, if abort situation between this switch and adjacent switch, goes to step 6）If therefore
Hinder position not between this switch and adjacent switch, then goes to step 7）；
5.1）Judge whether failure is gone to this switch upstream adjacent sections if this switch upstream adjacent sections are faulty
Step 6）If this switch upstream adjacent sections do not have faulty, step 7 is gone to）；
5.2）Judge whether failure is gone to this switch downstream adjacent sections if this switch downstream adjacent sections are faulty
Step 6）If this switch downstream adjacent sections do not have faulty, step 7 is gone to）；
6）Fault Isolation is carried out, fault point both sides switch is disconnected；
7）It is not processed, finishes.
The step 5.1）Middle intelligent terminal judges that upstream failure position is as follows：
5.11）Whether detection switch closes a floodgate, if so, going to step 5.12）, if it is not, judgement fault-free；
5.12）Detection switch whether failure, if so, going to step 5.13）, if it is not, going to step 5.14）；
5.13）Detect whether failure is reverse direction failure, if so, going to step 5.14）, if it is not, judgement fault-free；
5.14）The upstream switch of detection switch whether failure, if so, going to step 5.15）If it is not, going to step 5.17）
5.15）Detect whether failure is reverse direction failure, if so, going to step 5.16）, if it is not, going to 5.17）
5.16）Whether the upstream switch for detecting this switch closes a floodgate, if so, being failure to actuate, if it is not, going to step 5.17）
5.17）Detect this switch upstream adjacent switch whether failure, if so, going to step 5.18）, if it is not, going to step 5.19）
5.18）Judge whether failure is reverse direction failure, if so, being failure to actuate, if it is not, going to step 9)
5.19）Judge switch upstream respective section failure；
The step 5.2）Middle intelligent terminal judges that upstream failure position is as follows：
5.21）Whether detection switch closes a floodgate, if so, going to step 5.22）, if it is not, judgement fault-free；
5.22）Detection switch whether failure, if so, going to step 5.23）, if it is not, going to step 5.24）；
5.23）Detect whether failure is positive direction failure, if so, going to step 5.24）, if it is not, judgement fault-free；
5.24）The downstream switches of detection switch whether failure, if so, going to step 5.25）If it is not, going to step 5.27）
5.25）Detect whether failure is positive direction failure, if so, going to step 5.26）, if it is not, going to 5.27）
5.26）Whether the downstream switches for detecting this switch close a floodgate, if so, being failure to actuate, if it is not, going to step 5.27）
5.27）Detect this switch downstream adjacent switch whether failure, if so, going to step 5.28）, if it is not, going to step 5.29）
5.28）Judge whether failure is positive direction failure, if so, being failure to actuate, if it is not, going to step 5.29)
5.29）Judge switch upstream respective section failure；It finishes.
The negative direction is set manually, and can arbitrarily be replaced.
The positive direction is set manually, and can arbitrarily be replaced.
The switch upstream and switch downstream are set manually, and can arbitrarily be replaced.
Signal transmission module is equipped in the present invention between the adjacent intelligent terminal, for pair between adjacent intelligent object
Deng communication；Due to only being communicated with adjacent switch, integrated communication framework is not depended on, signal of communication simple in structure is stablized.And
Intelligent terminal can define arbitrary positive direction, conveniently adapt to different Power grid structures, applied widely.Will switch with every
It leaves pass to be provided separately, fault section excision can be also carried out in switch fault, stability is high.System will not be caused repeatedly to rush
It hits, improves the reliability and stability of power distribution network power supply.Logical operation module is transmitted by voltage sensor, current sensor
Voltage and current information judge switching-state information and be total to switching-state information and two adjacent logical operation modules
It enjoys, carries out small-scale communication, need not build big communication network, Small Extension Node. Communications are stablized, fast response time and at low cost.
There is the position in downstream on being determined by manually formulating both forward and reverse directions, this upstream or the specified of downstream can be according to the practical switches
The demand of positive direction determines, but no matter how specifies, and does not have an impact to other switch topology configuration informations.On the switch
Trip and switch downstream are set manually, and can arbitrarily be replaced.The upper of switch is determined according to the positive direction manually set and negative direction
Trip is with downstream so that system can be accurately positioned.When judging that section occurs for failure, using single switch as object, failure is judged
Point whether the switch upstream adjacent sections or downstream adjacent sections.It can be arbitrarily designated again after often completing primary fault isolation
Positive direction, degree of freedom is high, and the scope of application is big.
Description of the drawings
Fig. 1 is the structural schematic block diagram of the present invention,
Fig. 2 is adjacent intelligent terminal connection structure schematic block diagram in the present invention；
Fig. 3 is the work flow diagram of the present invention,
Fig. 4 is switch upstream adjacent sections breakdown judge flow chart in the present invention,
Fig. 5 is that switch upstream adjacent sections fault logic judges block diagram in the present invention,
Fig. 6 is switch downstream adjacent sections breakdown judge flow chart in the present invention,
Fig. 7 is that switch downstream adjacent sections fault logic judges block diagram in the present invention,
Fig. 8 is use state structural schematic block diagram of the present invention；
00 is fault point in figure, and 01 is power grid busbar one, and 02 is power grid busbar two, and 03 is power grid busbar three, and 1 is switch
One, 2 be switch two, and 3 be switch three, and 4 be switch four, and 5 be switch five, and 6 be switch six, and 7 be switch seven, and 8 be switch eight, and 9 are
Switch nine, 10 be switch ten.
Specific implementation mode
The present invention is as shown in Figs. 1-2, is a kind of fault location shielding system of the adaptive power distribution network method of operation, including electricity
Net busbar, is equipped with several switches on power grid busbar, and each switch is equipped with voltage sensor, current sensor and intelligence
Terminal, the voltage sensor and current sensor are connected by analog-digital converter with the intelligent terminal；Utilize intelligent terminal
The voltage and current information of the opposite inductive switch of processing, and fault verification is carried out, due to criterion simply because criterion is simple and reliable, no
Dependent on integrated communication, repeat impact will not be caused to system, improve the reliability and stability of power distribution network power supply.
Signal transmission module is equipped between the adjacent intelligent terminal, for the peer-to-peer communications between adjacent intelligent object；
It is only communicated with adjacent switch, is not depended on integrated communication framework, communication simple in structure is stablized.And intelligent terminal can define
Arbitrary positive direction conveniently adapts to different Power grid structures, applied widely.
Disconnecting switch is additionally provided in the switch, the disconnecting switch is connect with the intelligent terminal, the disconnecting switch
Switch for isolated fault.Fault section is cut off by force using disconnecting switch, does not influence to switch work.It will switch and be isolated
Switch is provided separately, and fault section excision can be also carried out in switch fault, and stability is high.System will not be caused repeatedly to rush
It hits, improves the reliability and stability of power distribution network power supply.
The intelligent terminal includes logical operation module, logic judgment module, instruction module and action module is isolated, described
Logical operation module is separately connected by analog-digital converter and voltage sensor, current sensor, and the logical operation module is patrolled
It collects judgment module, instruction module, isolation action module to be sequentially connected, the isolation action module connects disconnecting switch.
Logical operation module judges that on off state is believed by the voltage and current information that voltage sensor, current sensor transmit
It ceases and shares switching-state information and two adjacent logical operation modules, carry out small-scale communication, do not need structure
Build big communication network, Small Extension Node. Communications are stablized, fast response time and at low cost.
Switching-state information includes topological arrangement information, fault current status information, power flow direction information, switch divide-shut brake
Status information etc..Topological arrangement information refers to specifying the upstream of the switch is adjacent to open according to network frame topology using single switch as object
It closes and downstream adjacent switch.The specified of this upstream or downstream can determine according to the demand of the practical switch positive direction, but not
How pipe specifies, and is not had an impact to other switch topology configuration informations.Fault current state：Using single switch as object, if should
It is more than fault current definite value to switch the electric current flowed through, then is malfunction, otherwise is normal condition.
Power flow direction be with one switch for object, if electrical power by upstream flow downstream, i.e., it is consistent with positive direction, then for
Positive direction power；It is if flowing to upstream by downstream, i.e., consistent with negative direction, then it is negative direction power；For not properly if without electric current
To.
Switch opening and closing state：Switch is in gate-dividing state, then state is denoted as switch point；Switch is in "on" position, then
Switch is denoted as to close.
When judging that section occurs for failure, equally using single switch as object, whether judgement fault point is in the upstream of the switch
Adjacent sections or downstream adjacent sections.Positive direction is artificially formulated before judgement, can be appointed again after often completing primary fault isolation
Mean to determine positive direction（I.e. before being completed with a Fault Isolation action, positive direction is relatively fixed, and the system that will not upset normally is transported
Make）, degree of freedom is high, and the scope of application is big.Instruction module is connect by the signal transmission module with adjacent instruction module.It constructs
Small-sized communication framework carries out Small Extension Node. Communications, does not depend on original communication network, and there is a burden of communication network in mitigation source, and by
Close, the fast response time in distance, stability are high.
As shown in figure 3, being a kind of working method of the fault location shielding system of the adaptive power distribution network method of operation, by such as
Lower step work：
1）Voltage, the current signal of voltage sensor and current sensor acquisition switch are sent by analog-digital converter to intelligence
Terminal processes；Intelligent terminal judges on off state by these information, and provides Informational support for fault location.
2）Intelligent terminal judges switch over-current information, power direction, on off state, and is sent to the terminal of adjacent switch；
By the information exchange of two neighboring intelligent terminal, the state of adjacent switch is understood in real time, Informational support is provided for fault location.
3）Intelligent terminal judge this switch whether failure, 5 are gone to step if failure）, step 4 is gone to if not failure）；It is logical
The information such as understanding voltage and current are crossed, intelligent terminal may determine that
4）Judge adjacent switch whether failure；
5）Abort situation judgement is carried out, if abort situation between this switch and adjacent switch, goes to step 6）If therefore
Hinder position not between this switch and adjacent switch, then goes to step 7）；
5.1）Judge whether failure is gone to this switch upstream adjacent sections if this switch upstream adjacent sections are faulty
Step 6）If this switch upstream adjacent sections do not have faulty, step 7 is gone to）；
5.2）Judge whether failure is gone to this switch downstream adjacent sections if this switch downstream adjacent sections are faulty
Step 6）If this switch downstream adjacent sections do not have faulty, step 7 is gone to）；
6）Fault Isolation is carried out, fault point both sides switch is disconnected；
7）It is not processed, finishes.
The step 5.1）Middle intelligent terminal judges that upstream failure position is as follows：
5.11）Whether detection switch closes a floodgate, if so, going to step 5.12）, if it is not, judgement fault-free；
5.12）Detection switch whether failure, if so, going to step 5.13）, if it is not, going to step 4）；
5.13）Detect whether failure is reverse direction failure, if so, going to step 5.14）, if it is not, judgement fault-free；
5.14）The upstream switch of detection switch whether failure, if so, going to step 5.15）If it is not, going to step 7）
5.15）Detect whether failure is reverse direction failure, if so, going to step 5.16）, if it is not, going to 5.17）
5.16）Whether the upstream switch for detecting this switch closes a floodgate, if so, being failure to actuate, if it is not, going to step 5.17）
5.17）Detect this switch upstream adjacent switch whether failure, if so, going to step 5.18）, if it is not, going to step 5.19）
5.18）Judge whether failure is reverse direction failure, if so, being failure to actuate, if it is not, going to step 5.19)
5.19）Judge switch upstream respective section failure；
The step 5.2）Middle intelligent terminal judges that upstream failure position is as follows：
5.21）Whether detection switch closes a floodgate, if so, going to step 5.22）, if it is not, judgement fault-free；
5.22）Detection switch whether failure, if so, going to step 5.23）, if it is not, going to step 5.24）；
5.23）Detect whether failure is positive direction failure, if so, going to step 5.24）, if it is not, judgement fault-free；
5.24）The downstream switches of detection switch whether failure, if so, going to step 5.25）If it is not, going to step 5.27）
5.25）Detect whether failure is positive direction failure, if so, going to step 5.26）, if it is not, going to 5.27）
5.26）Whether the downstream switches for detecting this switch close a floodgate, if so, being failure to actuate, if it is not, going to step 5.27）
5.27）Detect this switch downstream adjacent switch whether failure, if so, going to step 5.28）, if it is not, going to step 5.29）
5.28）Judge whether failure is positive direction failure, if so, being failure to actuate, if it is not, going to step 5.29)
5.29）Judge switch upstream respective section failure；It finishes.
The positive direction, negative direction are set manually, and can arbitrarily be replaced.Have to determine by formulating both forward and reverse directions
The specified of the position in downstream, this upstream or downstream can determine according to the demand of the practical switch positive direction, but no matter how
It is specified, other switch topology configuration informations are not had an impact.The switch upstream and switch downstream are set manually, and can be with
Meaning is replaced.Determine the upstream switched with downstream so that system can accurately be determined according to the positive direction manually set and negative direction
Position.
Each Fault Isolation carries out judgement isolation, corresponding decision logic is simple, does not need complexity using single switch as object
Algorithm, system response time is fast, breakdown judge is isolated accurately, reduction maintains power grid security to the impact of power grid normal operation
Stable operation reduces power supply interrupted district area compared with once failure in the prior art needs to disconnect whole busbar, ensures that user uses
Electricity is stablized.
As shown in figure 8, being a kind of specific embodiment of the present invention, using open loop and cyclization hybrid operation mode, by three
Different substations respectively draws a busbar and forms orthogonal power grid busbar 1, power grid busbar 2 02 and power grid respectively
Busbar 3 03, between power grid busbar 1 and power grid busbar 2 02 be equipped be sequentially connected switch 1, switch 22, switch 33,
Switch 44, switch 55,66 switch 77 of switch and switch 88.One end of switch 99 be connected to switch 44 and switch 55 it
Between, one end of the other end connecting valve 10 of switch 99, the other end connection power grid busbar 3 03 of switch 10.Switch 77
It is interconnection switch, when fault point 00 is between switch 44 and switch 55, switch one, switch three, switch four, is opened switch two
Guan Jiu, switch ten detect failure, and failure is not detected in switch five, switch six, switch seven, switch eight, artificially defined at this time to open
It is positive direction to close the power that one 1, switch 22, switch 33, switch 99 and switch 10 switch, then the power of switch 44 is anti-
Direction, i.e. switch 99 are the upstream adjacent switches of switch 44, and switch 55 is the upstream adjacent switch of switch 44.In entire event
Switch 77 is in open circuit always in barrier positioning isolation processes（It disconnects）The effect of state, switch 77 is in fault location isolation junction
Beam, and while thering is staff to overhaul at the scene can close a floodgate, the switch between fault point and power grid busbar 2 02 is turned by power grid
Busbar 2 02 is powered, and non-failure point customer outage hours are shortened.
For switch 99, switch 99 detects failure, and power is positive direction.Simultaneously because switch 99 and power grid
Only have switch 44 between busbar 1 and power grid busbar 2 02 and detect failure, is switch 44 due to defining switch 99 before this
Upstream adjacent switch, and the power of switch 44 be negative direction, switch 44 switch meet particular requirement.Therefore, it is determined that failure
Point is happened at the section between switch 99 and switch 44, i.e. switch 99 needs to trip with isolated fault.
For switch 44, switch 44 detects failure, and power is negative direction.Consider that 44 upstream of switch is only opened
It closes 99 and detects failure, due to the downstream adjacent switch that switch 44 is switch 99, and the power of switch 99 is positive direction, is opened
It closes 99 and meets particular requirement.Therefore, it is determined that fault point is happened at the section between switch 99 and switch 44, switch 44 needs
It trips with isolated fault.
For the switch of switch 55, failure is not detected in switch 55.It is not opened between switch 55 and power grid busbar 2 02
Pass detects failure, therefore failure is not happened between switch 55 and power grid busbar 2 02；Switch 55 and power grid busbar 1
Between only switch 44 detect failure, between Simultaneous Switching 55 and power grid busbar 3 03 only switch 99 detect failure,
Due to the upstream adjacent switch that switch 55 is switch 44, and 44 power of switch is negative direction；Switch 55 is under switch 99
Adjacent switch is swum, and 99 power of switch is positive direction.Switch 44 and switch 99 have been satisfied by particular requirement.Therefore, it is determined that therefore
Barrier point is happened at the section between switch 55 and switch 44, so, switch 55 needs to trip with isolated fault.
In short, when judging that section occurs for failure, using single switch as object, whether judgement fault point is in the upstream of the switch
Adjacent sections or downstream adjacent sections.Positive direction is artificially formulated before judgement, can be appointed again after often completing primary fault isolation
Mean to determine positive direction（I.e. before being completed with a Fault Isolation action, positive direction is relatively fixed, and the system that will not upset normally is transported
Make）, degree of freedom is high, and the scope of application is big.Instruction module is connect by the signal transmission module with adjacent instruction module.It constructs
Small-sized communication framework carries out Small Extension Node. Communications, does not depend on original communication network, and there is a burden of communication network in mitigation source, and by
Close, the fast response time in distance, stability are high.
Claims (9)
1. a kind of fault location shielding system of the adaptive power distribution network method of operation, including power grid busbar, set on power grid busbar
There are several switches, which is characterized in that each switch is equipped with voltage sensor, current sensor and intelligent terminal, described
Voltage sensor and current sensor are connected by analog-digital converter with the intelligent terminal；
Signal transmission module is equipped between the adjacent intelligent terminal, for the peer-to-peer communications between adjacent intelligent terminal；
Disconnecting switch is additionally provided in the switch, the disconnecting switch is connect with the intelligent terminal, and the disconnecting switch is used for
The switch of isolated fault.
2. a kind of fault location shielding system of adaptive power distribution network method of operation according to claim 1, feature exist
In the intelligent terminal includes logical operation module, logic judgment module, instruction module and isolation action module, the logic
Computing module is separately connected by analog-digital converter and voltage sensor, current sensor, and the logical operation module, logic are sentenced
Disconnected module, instruction module, isolation action module are sequentially connected, and the isolation action module connects disconnecting switch.
3. a kind of fault location shielding system of adaptive power distribution network method of operation according to claim 2, feature exist
In described instruction module is connect by the signal transmission module with adjacent instruction module.
4. a kind of working method of the fault location shielding system of the adaptive power distribution network method of operation, which is characterized in that by as follows
Step works：
1）Voltage, the current signal of voltage sensor and current sensor acquisition switch are sent by analog-digital converter to intelligent terminal
Processing；
2）Intelligent terminal judges switch over-current information, power direction, on off state, and is sent to the terminal of adjacent switch；
3）Intelligent terminal judge this switch whether failure, 5 are gone to step if failure）, step 4 is gone to if not failure）；
4）Judge adjacent switch whether failure；
5）Abort situation judgement is carried out, if abort situation between this switch and adjacent switch, goes to step 6）If fault bit
It sets not between this switch and adjacent switch, then goes to step 7）；
5.1）Judge whether failure goes to step to this switch upstream adjacent sections if this switch upstream adjacent sections are faulty
6）If this switch upstream adjacent sections do not have faulty, step 7 is gone to）；
5.2）Judge whether failure goes to step to this switch downstream adjacent sections if this switch downstream adjacent sections are faulty
6）If this switch downstream adjacent sections do not have faulty, step 7 is gone to）；
6）Fault Isolation is carried out, fault point both sides switch is disconnected；
7）It is not processed, finishes.
5. a kind of work side of the fault location shielding system of adaptive power distribution network method of operation according to claim 4
Method, which is characterized in that the step 5.1）Middle intelligent terminal judges that upstream failure position is as follows：
5.11）Whether detection switch closes a floodgate, if so, going to step 5.12）, if it is not, judgement fault-free；
5.12）Detection switch whether failure, if so, going to step 5.13）, if it is not, going to step 5.14）；
5.13）Detect whether failure is reverse direction failure, if so, going to step 5.14）, if it is not, judgement fault-free；
5.14）The upstream switch of detection switch whether failure, if so, going to step 5.15）If it is not, going to step 5.17）
5.15）Detect whether failure is reverse direction failure, if so, going to step 5.16）, if it is not, going to 5.17）
5.16）Whether the upstream switch for detecting this switch closes a floodgate, if so, being failure to actuate, if it is not, going to step 5.17）
5.17）Detect this switch upstream adjacent switch whether failure, if so, going to step 5.18）, if it is not, going to step 5.19）
5.18）Judge whether failure is reverse direction failure, if so, being failure to actuate, if it is not, going to step 9)
5.19）Judge switch upstream respective section failure.
6. a kind of work side of the fault location shielding system of adaptive power distribution network method of operation according to claim 4
Method, which is characterized in that the step 5.2）Middle intelligent terminal judges that upstream failure position is as follows：
5.21）Whether detection switch closes a floodgate, if so, going to step 5.22）, if it is not, judgement fault-free；
5.22）Detection switch whether failure, if so, going to step 5.23）, if it is not, going to step 5.24）；
5.23）Detect whether failure is positive direction failure, if so, going to step 5.24）, if it is not, judgement fault-free；
5.24）The downstream switches of detection switch whether failure, if so, going to step 5.25）If it is not, going to step 5.27）
5.25）Detect whether failure is positive direction failure, if so, going to step 5.26）, if it is not, going to 5.27）
5.26）Whether the downstream switches for detecting this switch close a floodgate, if so, being failure to actuate, if it is not, going to step 5.27）
5.27）Detect this switch downstream adjacent switch whether failure, if so, going to step 5.28）, if it is not, going to step 5.29）
5.28）Judge whether failure is positive direction failure, if so, being failure to actuate, if it is not, going to step 5.29)
5.29）Judge switch upstream respective section failure；It finishes.
7. a kind of work side of the fault location shielding system of adaptive power distribution network method of operation according to claim 5
Method, which is characterized in that the negative direction is set manually, and can arbitrarily be replaced.
8. a kind of work side of the fault location shielding system of adaptive power distribution network method of operation according to claim 6
Method, which is characterized in that the positive direction is set manually, and can arbitrarily be replaced.
9. a kind of work of the fault location shielding system of adaptive power distribution network method of operation according to claim 5 or 6
Method, which is characterized in that
The switch upstream and switch downstream are set manually, and can arbitrarily be replaced.
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| CN109245072B (en) * | 2018-09-17 | 2020-02-21 | 南京国电南自电网自动化有限公司 | Self-adaptive in-situ feeder automation fault processing method based on regional sequence number |
| CN109655709A (en) * | 2018-10-19 | 2019-04-19 | 南京海兴电网技术有限公司 | A kind of Fault Locating Method based on distributed feeder automation |
| CN115497364B (en) * | 2022-08-26 | 2024-08-13 | 贵州电网有限责任公司 | Method and system for switching preset logic of multimode terminal of movable mode platform of power distribution network |
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