CN106058831B - A kind of intelligent distributed quick protection of adaptive power distribution network and failure separation method - Google Patents
A kind of intelligent distributed quick protection of adaptive power distribution network and failure separation method Download PDFInfo
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- CN106058831B CN106058831B CN201610634055.7A CN201610634055A CN106058831B CN 106058831 B CN106058831 B CN 106058831B CN 201610634055 A CN201610634055 A CN 201610634055A CN 106058831 B CN106058831 B CN 106058831B
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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
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Abstract
Intelligent distributed quick protection and failure separation method the invention discloses a kind of adaptive power distribution network, terminal acquisition summarize inlet wire on the node of this interval and each branch electricity and network topological information；It is communicated by quick peer-to-peer network, send this node and receives the inlet wire for handling upstream and downstream node separation and each branch electricity and network topological information, while the terminal online information of upstream and downstream node is monitored in real time；According to for distribution unit feeder network, looped network, the preset adaptive failure Rule of judgment of petal web frame and combinational logic, in the case of distribution network failure, the quick fault type for judging identification power distribution network and fault zone；Output control signal performs the outlet of protection fast trip, the corresponding switch isolation failure of tripping.The present invention can be used in intelligent distribution network, realize the accident analysis and fast failure isolation of power distribution network unit feeder, looped network and petal net when failure under complex network structures, effectively increase the reliability of supplying power allocation.
Description
Technical field
Fault message detects when the present invention is directed to current Distribution Network Equipment failure, trouble point is quickly protected and is isolated, failure
Restore etc., the artificial judgment of scheduling station or personnel is needed to handle mostly or needs the execute-in-place of distribution staff complete
It is long into the processing of, Fault Isolation and service restoration time, the problem of influencing the stable operation of distribution and user's long-term normal electricity consumption,
Intelligent distributed quick protection and the failure separation method of a kind of adaptive power distribution network looped network and petal net are invented.Belong to electric power
System intelligent power distribution network technology field.
Background technology
Since power distribution network is related to that user is more, overlay area is wide, user's property is complicated, network branches are more, topological structure is complicated,
Operation stability and power supply reliability are more demanding, this proposes the fast failure processing of distribution automation system higher
It is required that.And distribution protection and its fault location, be Fault Isolation and Distribution system basis, to ensure power supply reliability, carry
High power supply quality is of great significance.
At present, failure positioning and processing be mainly the following mode：
First, the fault location system based on fault detector and communication substation composition
When there is short circuit or earth fault in system, pointer detection to short-circuit current or signal specific electric current stream
It crosses, indicator motion, by communication system, main website is issued into action signal transmission（From the background）System, main website（From the background）System into
Row network topology calculates analysis, and fault message is notified the relevant personnel with short message mode, and be combined with GIS-Geographic Information System, can
To directly display the geographical location information that is out of order, and shown on geographical background.Operating maintenance personnel can directly arrive
It fixes a breakdown trouble point.Feature：Transformation primary equipment, with good investment, easy practice and extension are not needed to；Shortcoming：Fault locating analysis
Time is longer, it is impossible to be accurately positioned and be isolated；
2nd, type automatic circuit mode feed line automatization system on the spot
According to " voltage-time type " principle, incoming call closes, the working characteristics without pressure release, existing primary with substation
Reclosing coordinates, and is detected by voltage sequential logic, does not depend on power distribution automation main station and communication, determines fault section position,
And be latched the forward and backward voltage-type in trouble point switch electric combined floodgate function, realize " on the spot be isolated " of fault section.Feature：It disobeys
Communication and automation main website is relied to realize Fault Isolation " on the spot "；Shortcoming：Time-delay closing step by step is switched, makes accident interval judgement, thing
Therefore the power transmission recovery time in zone isolation and non-accident section is longer；The power supply of mains side non-faulting section needs distribution certainly before failure
Dong Hua main websites control.
3rd, the concentrated feed line automatization system based on FDTU and automation main website
Corresponding FTU, DTU device of corresponding substation line/switchyard/switching station/on-pole switch etc. installation carries out
The signals such as protection signal, the position of the switch are uploaded to automation main website by signal acquisition by communicating.
The fault warning information that power distribution automation main station is detected according to distribution terminal, with reference to substation, switchyard/opening and closing
Protection signal, switch separating brake etc. relevant informations carry out comprehensive descision, startup separator processing routine determines fault type
And fault section, it realizes fault section isolation and restores the power supply of non-faulting section.Feature：It is easy to implement without protection cooperation；It is right
Relatively convenient, favorable expandability are handled when the circuit that network topology is complicated, branch is more；Shortcoming：Substation's reclosing is needed to match
It closes；Function relies on main website end and carries out, and fault location is isolated into minute grade, and the time is longer；During each failure, whole circuit all exists
Have a power failure in short-term.
The feed line automatization system of other such as distribution terminal based on optical fiber longitudinal differential+automation main websites can solve nothing
The problem of quick protection of branch's backbone, the selectivity of protection is good, and sensitivity is also high.But this method Project Realization is more complicated,
It is limited to the engineering application state reply of distribution complex topology and fast-developing enlarging, it is impossible to fundamentally to solve protection for feed line and adapt to
Sex chromosome mosaicism.
In short, the quick Journal of Sex Research of distribution protection and the emphasis of Fault Isolation are the processes of its practical application, you can are carried
High control performance, while various distribution network topology structures can be adapted to automatically again, the number under conditions of main station system is not depended on
Fault insulation and resume power supply is completed in second, to meet responsible consumer higher requirement to power supply reliability.
Invention content
The technical problems to be solved by the invention are to provide the intelligence point of a kind of adaptive power distribution network looped network and petal net
Cloth is quickly protected and failure separation method, can not depend on the control of distribution scheduling main website, adapt to various power distribution network networks automatically
Topological structure realizes that the isolation that fault zone is selectively completed in the several seconds with restoring electricity, meets responsible consumer to power supply
The high request of reliability improves the stability and power supply reliability of distribution network operation.
For achieving the above object, the present invention is that following technical solution is taken to realize:
A kind of intelligent distributed quick protection of adaptive power distribution network and failure separation method, it is characterised in that：Including
Step 1：Terminal acquisition summarizes inlet wire on the node of this interval and each branch electricity and network topological information；
Step 2：It is communicated by quick peer-to-peer network, send this node and receives the inlet wire of processing upstream and downstream node separation
With each branch electricity and network topological information, while the terminal online information of upstream and downstream node is monitored in real time；
Step 3：According to for distribution unit feeder network, looped network, the preset adaptive failure Rule of judgment of petal web frame
And combinational logic, in the case of distribution network failure, the quick fault type for judging identification power distribution network and fault zone；
Step 4：According to breakdown judge analysis result, output control signal performs the outlet of protection fast trip, and tripping is corresponding
Switch isolation failure；
Step 5：Terminal exports corresponding alarm prompt, while will be in remote signalling, telemetering, alarm, protection signal
Distribution main website is reached, main website remotely monitor and field failure to be assisted to restore processing and provide technical basis.
A kind of intelligent distributed quick protection of aforementioned adaptive power distribution network and failure separation method, it is characterised in that：
The step 1, the mould of circuit operation at the power grids supply node such as switching station, ring main unit, on-pole switch including acquiring power distribution network
Analog quantity voltage and current, switch division bit switch amount, network topology data, calculate the digital quantity voltage/current of circuit, power,
The electrical parameters such as frequency, power direction, judge for follow-up Distribution Network Failure and main website operating condition monitoring data use.
A kind of intelligent distributed quick protection of aforementioned adaptive power distribution network and failure separation method, it is characterised in that：
The step 2, including being communicated by quick peer-to-peer network, transmitting this node and receiving the electricity and net of upstream and downstream node separation
The information such as network topology, while the online situation of terminal for monitoring interdependent node, specific method are：
21）By looped network or petal net, according to single ring architecture, the quick equity based on Ethernet or optical-fibre communications is set up
Communication network, will be in all node access networks networks on ring.
22）By quick peer to peer communication network, all nodes broadcast the voltage and current for transmitting this node, protection starts,
On the operational parameter datas to network such as direction, network topology structure, receive and use for other intervals；
23）The operations such as voltage and current, protection startup, direction, the network topology structure of adjacent node are received by network to join
Number data；
24）Pass through the transmission of the heartbeat message of Fixed Time Interval between adjacent node, it can be determined that going out adjacent node is
No normal on-line operation.If adjacent node is not online, then the nodal information is abandoned, automatic extension traces back to normal online adjacent
(upstream/downstream) node carries out the interaction of operational parameter data with it, adaptively adjusts the error protection range of the node.
For unit feeder and loop network topology structure, the node position in upstream and downstream is determined by the current direction artificially assert
It puts.
For petal net topology structure, be then split as several ring-network topologies at petal net node, then according to
Multiple ring network structures carry out node location identification and the Communication processing of upstream and downstream respectively.
A kind of intelligent distributed quick protection of aforementioned adaptive power distribution network and failure separation method, it is characterised in that：
The step 3, including being directed to distribution unit feeder network, looped network, petal web frame, according to decentralized breakdown judge condition and in advance
Fixed combinational logic, in the case of distribution network failure, the quick fault type for judging identification power distribution network and fault zone, specifically
Method is：
31）In line fault, the node current protection for experiencing fault current starts, at the same active it is quick repeat to
The trip informations such as the protection startup of the node, direction, topological structure are sent on network.
32）Using the online query mode based on mirror reflection formula, whether active inquiry adjacent spaces terminal is online, ensures
Each nodal information is reliable in real time on communication network.
33）According to the fault parameter information of this node during failure and upstream and downstream interdependent node, according to preset power distribution network
Breakdown judge condition and combinational logic, the quick fault type for judging identification power distribution network and fault zone, while generate corresponding
Warning information.
A. according to current protection situation, whether failure judgement type is singlephase earth fault, phase fault or three
Phase short trouble.
B. for unit feeder topological structure type, according to this node current protection startup+upstream current protection startup+downstream
Current protection do not start+and the consistent condition judgment of starter node current direction is this node to line fault between downstream node；
C. for loop network topology structure, when cyclization, started according to this node current protection startup+upstream current protection+
Downstream current protection startup+this node and upstream（Downstream）Node current direction is consistent+this node and downstream（Upstream）Node electricity
The opposite condition judgment in direction is flowed for this node to downstream（Upstream）Line fault between node；
When unlinking, principle is the same as unit feeder topological structure.
It d., can be respectively independent according to ring-network topology after being split according to multiple ring network structures for petal net topology structure
Structure carries out fault analysis and handling.
At petal node, then the electric current to multiple switch node and its direction simultaneously and network topology is needed to carry out
Comprehensive analysis and judgement.
A kind of intelligent distributed quick protection of aforementioned adaptive power distribution network and failure separation method, it is characterised in that：
The step 4 according to the breakdown judge analysis result of preceding step 3, performs protection fast trip outlet tripping and switchs accordingly
Isolated fault.
It, can be according to back for unit feeder topological structure type, loop network topology structure type, petal net topology type
The nearest downstream node switch of rapid judgement, the nearest Node Switch in tripping breakdown judge point upstream, and shunt tripping tripping, excision is simultaneously
Isolated fault.Corresponding fault warning information is generated simultaneously, assists main website operations staff or distribution repair and maintenance personnel to matching
Electric network fault carries out high-speed decision analysis and the processing that restores electricity.
A kind of intelligent distributed quick protection of aforementioned adaptive power distribution network and failure separation method, it is characterised in that：
The step 5 by intelligent distributed rapid communication network, accesses power distribution network scheduling station system, carries out corresponding information friendship
Mutually, the information such as corresponding remote signalling, telemetry intelligence (TELINT) and protection act and fault section detection, Fault Isolation are uploaded, assist main website
Remote signal monitors, and provides technical basis for distribution operation maintenance personnel field failure recovery processing.
The beneficial effects of the invention are as follows：The present invention devises the intelligent distribution of a kind of adaptive power distribution network looped network and petal net
Formula quickly protection and failure separation method, available in intelligent distribution network, it is automatic adapt to Distributing network structure and the method for operation such as cyclization/
It unlinks, is bicyclic, the variation of the complex network topologies such as petal type, while not depending on main station system, realizing the quick of Distribution Network Failure
Protection and fault section isolation, the restriction distribution network failure power failure range of minimum, effectively improve power distribution network level of security and
Operation and maintenance efficiency.
Description of the drawings
Fig. 1 is a kind of adaptive power distribution network looped network and the intelligent distributed quick protection of petal net and failure separation method stream
Cheng Tu；
Fig. 2 is a kind of adaptive power distribution network looped network and the intelligent distributed quick protection of petal net and failure separation method net
Network framework schematic diagram.
Specific embodiment
Make specific introduce to the present invention below in conjunction with attached drawing.
Fig. 1 is intelligent distribution network distribution fast protection method flow chart of the present invention.
The simulation of circuit operation first at the power grids supply node such as switching station, ring main unit, on-pole switch of acquisition power distribution network
Measure the data such as voltage and current, switch division bit switch amount, network topology, calculate the digital quantity voltage/current of circuit, power,
The electrical parameters such as frequency, power direction, judge for follow-up Distribution Network Failure and main website operating condition monitoring data use.
Then it is communicated by quick peer-to-peer network, transmit this node and receives the electricity of upstream and downstream node separation and network is opened up
It information, while the online situation of terminal for monitoring interdependent node such as flutters, if adjacent node is not online, then abandons the nodal information, from
Dynamic extension traces back to normal online adjacent (upstream/downstream) node, and the interaction of operational parameter data is carried out with it, adaptive to adjust
The error protection range of the whole node.
For distribution unit feeder network, looped network, petal web frame, according to decentralized breakdown judge condition and scheduled combination
Logic, in the case of distribution network failure, the quick fault type for judging identification power distribution network and fault zone：
A. according to current protection situation, whether failure judgement type is singlephase earth fault, phase fault or three
Phase short trouble.
B. for unit feeder topological structure type, according to this node current protection startup+upstream current protection startup+downstream
Current protection does not start the+consistent condition of starter node current direction, is judged as this node to line fault between downstream node；
C. for loop network topology structure, when cyclization, started according to this node current protection startup+upstream current protection+
Downstream current protection startup+this node and upstream（Downstream）Node current direction is consistent+this node and downstream（Upstream）Node electricity
The opposite condition in direction is flowed, is judged as this node to downstream（Upstream）Line fault between node；
When unlinking, principle is the same as unit feeder topological structure.
It d., can be respectively independent according to ring-network topology after being split according to multiple ring network structures for petal net topology structure
Structure carries out fault analysis and handling.
At petal node, then the electric current to multiple switch node and its direction simultaneously and network topology is needed to carry out
Comprehensive analysis and judgement.
According to breakdown judge analysis result, the protection fast trip outlet corresponding switch isolation failure of tripping is performed, simultaneously
Corresponding fault warning information is generated, operations staff or distribution repair and maintenance personnel is assisted to carry out fast quick decision to distribution network failure
Plan is analyzed and the processing that restores electricity.
Finally, the letters such as corresponding remote signalling, telemetry intelligence (TELINT) and protection act and fault section detection, Fault Isolation are uploaded
Breath, the remote signal monitoring of auxiliary main website, and provide technical basis for distribution operation maintenance personnel field failure recovery processing.
Fig. 2 is intelligent distributed quick protection and the Fault Isolation of a kind of adaptive power distribution network looped network of the present invention and petal net
Method network architecture schematic diagram.
As shown in Fig. 2, the network of this method is mainly whole by being mounted on the intelligent power distribution of each line switching node of power distribution network
The intelligent distributed rapid communication network equipment composition of the quick peer to peer interaction of terminal room is supported at end.
Distribution terminal acquires the data such as the analog quantity voltage electric current of circuit operation, network topological information in real time, calculates outlet
The electrical parameters such as the digital quantity voltage/current on road, power, frequency, power direction, distribution network breakdown judge and main website distribution fortune
Row monitoring of working condition data use.
Each terminal on electrical nodes acquires node where oneself respectively（Ring main unit, switching station etc.）Each branch it is real-time
The failures amount information such as voltage and current direction, while send on network the parameter information of this interval node.
When line failure, while whether terminal is online on active inquiry adjacent node, as adjacent node terminal exists
Line then receives the failures amount information such as the upstream and downstream node voltage current direction that upstream and downstream node-node transmission comes, by this terminal
The information such as preset accident analysis decision logic, the quick type/fault coverage for identifying failure, require, delay is jumped according to the time limit
The power supply in non-faulting region is restored in the corresponding fault zone of lock excision failure.
Above-described embodiment does not limit the present invention in any form, and all forms for taking equivalent substitution or equivalent transformation are obtained
Technical solution, be within the scope of the present invention.
Claims (5)
1. a kind of intelligent distributed quick protection of adaptive power distribution network and failure separation method, it is characterised in that：Including following
Step：
Step 1：Terminal acquisition summarizes inlet wire on the node of this interval and each branch electricity and network topological information；
Step 2：It is communicated by quick peer-to-peer network, send this node and receives the inlet wire of processing upstream and downstream node separation and each
Branch electricity and network topological information, while the terminal online information of upstream and downstream node is monitored in real time；
Step 3：According to for distribution unit feeder network, looped network, the preset adaptive failure Rule of judgment of petal web frame and group
It is logical, in the case of distribution network failure, judge to identify fault type and the fault zone of power distribution network；
Step 4：According to breakdown judge analysis result, output control signal performs the outlet of protection fast trip, and tripping is opened accordingly
Close isolated fault；
Step 5：Terminal exports corresponding alarm prompt, while remote signalling, telemetering, alarm and protection signal are uploaded
To distribution main website, main website remotely monitor and field failure to be assisted to restore processing and provide technical basis；
The step 3 specific method is：
31）In line fault, the node current protection for experiencing fault current starts, while the quick of active is repeated to network
Upper protection startup, direction and the topological structure trip information for sending the node；
32）Using the online query mode based on mirror reflection formula, whether active inquiry adjacent spaces terminal is online；
33）According to the fault parameter information of this node during failure and upstream and downstream interdependent node, according to preset distribution network failure
Rule of judgment and combinational logic, the quick fault type for judging identification power distribution network and fault zone；
A. according to current protection situation, whether failure judgement type is that singlephase earth fault, phase fault or three-phase are short
Road failure；
B. for unit feeder topological structure type, according to this node current protection startup+upstream current protection startup+downstream electric current
Protection does not start the+consistent condition of starter node current direction, is judged as this node to line fault between downstream node；
C. for loop network topology structure, when cyclization, according to this node current protection startup+upstream current protection startup+downstream
Current protection startup+this node is consistent with upstream/downstream node current direction+this node and downstream/upstream node current direction
Opposite condition is judged as this node to line fault between downstream/upstream node；
When unlinking, principle is the same as unit feeder topological structure；
It d., can be respectively independent according to loop network topology structure after being split according to multiple ring network structures for petal net topology structure
Carry out fault analysis and handling；
At petal node, then comprehensive analysis is carried out to the electric current of multiple switch node and its direction and network topology simultaneously
Judge；
The step 4,
For unit feeder topological structure type, loop network topology structure type and petal net topology type, sentencing according to step 3
It is disconnected, the nearest Node Switch in tripping breakdown judge point upstream, and the downstream node switch that shunt tripping tripping is nearest, it cuts off and event is isolated
Barrier.
2. intelligent distributed quick protection and the failure separation method of a kind of adaptive power distribution network according to claim 1,
It is characterized in that：The step 1, including acquiring the switching station of power distribution network, line at ring main unit or on-pole switch power grid supply node
Analog quantity voltage, electric current, switch division bit switch amount and the network topology data of road operation calculate the digital quantity electricity of circuit
Pressure/electric current, power, frequency and power direction electrical parameter judge and main website operating condition monitoring data for follow-up Distribution Network Failure
It uses.
3. intelligent distributed quick protection and the failure separation method of a kind of adaptive power distribution network according to claim 1,
It is characterized in that：The step 2 specific method is：
21）By looped network or petal net, according to single ring architecture, the quick peer to peer communication based on Ethernet or optical-fibre communications is set up
Network, will be in all node access networks networks on ring；
22) by quick peer to peer communication network, all nodes broadcast the voltage for transmitting this node, electric current, protection startup, direction
On network topology structure operational parameter data to network, receive and use for other intervals；
For unit feeder and loop network topology structure, the node location in upstream and downstream is determined by the current direction of setting；
For petal net topology structure, then several ring-network topologies are split as at petal net node, then according to multiple
Ring network structure carries out node location identification and the Communication processing of upstream and downstream respectively；
23) voltage, electric current, protection startup, direction and the network topology structure operating parameter number of adjacent node are received by network
According to；
24) by the transmission of the heartbeat message of Fixed Time Interval between adjacent node, judge whether adjacent node normally exists
Line is run；If adjacent node is not online, then the nodal information being abandoned, automatic extension traces back to normal online adjacent node, with
It carries out the interaction of operational parameter data, adaptively adjusts the error protection range of the node.
4. intelligent distributed quick protection and the failure separation method of a kind of adaptive power distribution network according to claim 1,
It is characterized in that：Corresponding fault warning information is generated while excision, isolated fault.
5. intelligent distributed quick protection and the failure separation method of a kind of adaptive power distribution network according to claim 1,
It is characterized in that：The step 5 by intelligent distributed rapid communication network, accesses power distribution network scheduling station system, carries out
Corresponding information exchange uploads corresponding remote signalling, telemetry intelligence (TELINT) and protection act and fault section detection, Fault Isolation letter
Breath, the remote signal monitoring of auxiliary main website.
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Effective date of registration: 20190528 Address after: No. 2, Fenghuang West Road, Taizhou City, Jiangsu Province, China Co-patentee after: Jiangsu Fangtian Power Technology Co., Ltd. Patentee after: Taizhou power supply branch, Jiangsu Electric Power Co., Ltd. Co-patentee after: State Grid Jiangsu Electric Power Co., Ltd. Electric Power Research Institute Co-patentee after: State Grid Jiangsu Electric Power Co., Ltd. Co-patentee after: State Grid Corporation of China Address before: 211102 Suyuan Building, 58 Suyuan Avenue, Jiangning District, Nanjing City, Jiangsu Province Co-patentee before: Taizhou Power Supply Co. of Jiangsu Electric Power Co. Patentee before: Jiangsu Fangtian Power Technology Co., Ltd. Co-patentee before: STATE GRID JIANGSU ELECTRIC POWER COMPANY Co-patentee before: State Grid Corporation of China |
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