CN109004631A - Network-based power distribution network self-adaptive backup protection control system and method - Google Patents
Network-based power distribution network self-adaptive backup protection control system and method Download PDFInfo
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- CN109004631A CN109004631A CN201810768983.1A CN201810768983A CN109004631A CN 109004631 A CN109004631 A CN 109004631A CN 201810768983 A CN201810768983 A CN 201810768983A CN 109004631 A CN109004631 A CN 109004631A
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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
- H02H7/28—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
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Abstract
The invention discloses a network-based power distribution network self-adaptive backup protection control system, which comprises: set up and distribute net sub-station controlling means of net sub-station department and rather than a plurality of distribution network protection control terminal through network connection, wherein: the distribution network substation control device is used for carrying out self-adaptive identification on network topology connected with the distribution network substation, determining a main protection and backup protection strategy, a backup self-healing strategy, a time sequence and a fixed value, and issuing the main protection and backup protection strategy, the backup self-healing strategy, the time sequence and the fixed value to a distribution network protection control terminal; the distribution network protection control terminal is arranged in each distribution station/switching station of the distribution network and used for transmitting real-time data acquisition information of the distribution station/switching station to the regional substation; receiving breaker/load switch action information sent by the regional substation control device, executing corresponding action, and reporting action execution results; and the time setting result is used for receiving the time setting result issued by the regional substation, and the matching between the backup protection and the main protection is realized. The invention also discloses a corresponding method. By implementing the invention, the fault area can be quickly and accurately cut off and isolated, and the power supply can be timely recovered for the normal area, thereby ensuring the reliability of the power supply.
Description
Technical field
The present invention relates to a kind of technical field of the distribution protection of electric system, more particularly to a kind of network-based match
The adaptive back-up protection control system of power grid and method.
Background technique
With connection type type, more, network structure changes frequently power distribution network, and number of devices is numerous and jumbled, configuration level is irregular not
Together with the characteristics of method of operation is changeable, distributed generation resource accesses and variation, it is desirable that protection control can adapt to the change of network connection
Change, the variation of device configuration, the variation of the method for operation.
Separate configurations between the protection control of current power distribution network, lack good mating capability between each other, and be difficult to
The variation of distribution network topology adapt to automatically.And it can preferably gram using the protection formed based on network in current power distribution network
Configuration between clothes protection control, mating capability is poor, is difficult to follow distribution network change in topology and adaptive problem, but
In the case where network failure occurs, the selectivity and reliability of protection will be difficult to ensure.
Power distribution network main protection at present or its back-up protection majority are to be determined with separate configurations with fixed current ration and time
Value come select failure removal region and normal region recovery sequence.Part power distribution network main protection or its back-up protection joined network
To enhance the communication capacity between protection, mating capability between enhancing protection.
The control method of power distribution network back-up protection at present is primarily present following defect:
1, separate configurations between the protection control of current power distribution network, lack good mating capability, and be difficult between each other
As the variation of distribution network topology adapts to automatically.
2, it uses preferably overcome based on the protection that network is formed in current power distribution network and configures, matches between protection control
Conjunction ability is poor, is difficult to follow distribution network change in topology and adaptive problem, but in the case where network failure occurs,
The selectivity and reliability of protection will be difficult to ensure.
Summary of the invention
Technical problem to be solved by the present invention lies in provide a kind of adaptive back-up protection control of network-based power distribution network
System and method processed.There is good registration property between its each protection, the variation of distribution network topology can be adapted to automatically；
It, can be by guaranteeing the selection protected to the timing information for transmitting information between protection and in the case where network failure occurs
Property and reliability, thus rapidly and accurately excision, isolated fault region, and restored electricity in time for normal region, guarantee power supply
Reliability.
In order to solve the above technical problems, the present invention provides a kind of network-based adaptive back-up protection controls of power distribution network
System, comprising: distribution substation control device and the multiple distribution network protection controlling terminals for passing through network connection with it, in which:
Distribution substation control device is set at distribution substation, the network topology for being connected to distribution substation into
Row self-adapting estimation for determining main protection and back-up protection strategy, standby Self healing Strategy, timing, definite value, and is issued to distribution
Protect controlling terminal；And the active self-healing of fault self-recovery and service restoration is realized for starting reclosing and prepared auto restart；
The distribution network protection controlling terminal is set in each power distribution station/switchyard of power distribution network, for sending on district substation
The real-time data acquisition information of the power distribution station/switchyard；And breaker/load that receiving area substation control device issues is opened
Action message is closed, corresponding movement, and report action implementing result are executed；And the time definite value issued for receiving area substation
Adjusting is as a result, realize that the cooperation of back-up protection and main protection and unit are autonomous.
Wherein, the real-time data acquisition information of the power distribution station/switchyard includes: the folding shape of breaker or on-load switch
State information, bus and route operation information, Condition Detection and fault warning information；Wherein, the bus and route are run
Information is busbar voltage sample information or line current sample information.
Wherein, the network is the communication network of 100/1000Mbps Ethernet composition.
Correspondingly, the present invention also provides a kind of network-based adaptive back-up protection control methods of power distribution network, preceding
It is realized in the system stated, which comprises
Step S10, the measuring value of distribution substation control device periodic receipt distribution network protection controlling terminal, and form distribution
The timing definite value coordinated scheme for protecting controlling terminal, is handed down to variant distribution network protection controlling terminal；When communication failure occurs,
Distribution substation control device and distribution network protection controlling terminal respectively detect under link failure that control device locking in distribution substation is logical
Believe the main protection of fault zone, distribution network protection controlling terminal then starts the back-up protection on the spot of corresponding region；
Step S11, distribution network protection controlling terminal executes protection act and fault location, is sentenced according to maximum load current definite value
Whether broken string road breaks down, and different protection control modes is executed according to the difference of terminal type, the terminal type packet
Include circuit breaker terminal and on-load switch terminal；
Step S12, circuit breaker terminal carries out failure removal first, is needing mated condition between multiple circuit breaker terminals
When, it needs to carry out time cooperation to breaker, is cooperated by breaker and determine failure generation area；
Step S13, on-load switch terminal is according to the breaker actuation time, and whether judgement itself is in breaker excision failure
In range, if it is decided that when being in fault coverage to on-load switch, make on-load switch quartile rapidly；
Step S14, circuit breaker terminal is after cutting off failure, and after on-load switch quartile operation time limit, according to distribution
The operation time limit of substation control device adjusting, carries out breaker reclosing, gradually to restore electricity
Step S15, on-load switch terminal judges whether fault current extinction time reaches itself and close after reclosing success
Lock time definite value controls this unit load switch coincidence, so that power loss route is gradually recovered confession after reaching time definite value
Electricity；
Step S16, on-load switch terminal carries out overcurrent judgement after combined floodgate, judges fault element；Circuit breaker terminal is being cut
After failure, and after on-load switch quartile operation time limit, accelerates breaker reclosing, restore electricity；
Step S17, after meeting all on-load switch times of coincidence, faulty electric current is not generated yet, then determines current event
Barrier is transient fault；
Step S18, distribution substation control device according to the appearance-disappearance-occurs again-of the fault current disappear again when
Between, it is compared with the timing of all terminals adjusting relationship, finally determines fault point.
Wherein, the step of on-load switch terminal carries out overcurrent judgement after combined floodgate, judges fault element in the step S16
Further comprise:
When overcurrent occurs in coincidence moment and disappears, on-load switch this unit load of terminal control switchs quartile, judges failure
Element is on-load switch adjacent unit；
Occur overcurrent after going through a period of time after coincidence and disappear, on-load switch terminal keeps this unit load switch to close
Position, judges fault element for the non-adjacent unit of load switch downstream.
Wherein, the step S16 further comprises: if at the appointed time range internal fault current vanishes, determining negative
Lotus switch is in breaker excision fault coverage.
Implement the present invention, have it is following the utility model has the advantages that
In system and method provided by the invention, due to passing through network in distribution substation control device and distribution network protection control
Transmitting data information between terminal processed respectively has good registration property between protection, can adapt to distribution network topology automatically
Variation can pass through and the timing information for transmitting information between protection is guaranteed to protect and in the case where network failure occurs
The selectivity and reliability of shield.
The present invention makes full use of the ability of transmitted data on network information, substantially enhances the registration property between protection, energy
The variation of enough adaptive network topologys, and joined the timing information between information transmission, ensure that the selectivity of protection with
Reliability, thus rapidly and accurately excision, isolated fault region, and restore electricity in time for normal region, guarantee that power supply is reliable
Property.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is an a kind of implementation of network-based adaptive back-up protection control system of power distribution network provided by the invention
The structural schematic diagram of example；
Fig. 2 is an a kind of implementation of network-based adaptive back-up protection control method of power distribution network provided by the invention
The main flow schematic diagram of example；
Fig. 3 is an a kind of implementation of network-based adaptive back-up protection control method of power distribution network provided by the invention
The detailed process schematic diagram of example.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Figure 1, showing a kind of network-based power distribution network adaptive back-up protection control system provided by the invention
The structural schematic diagram of one embodiment of system；In the present embodiment, the system comprises:
Distribution substation control device 1 and the multiple distribution network protection controlling terminals 3 being connect with it by communication network 2, in which:
Distribution substation control device 1 is set at distribution substation, the network topology for being connected to distribution substation
Self-adapting estimation is carried out, for determining main protection and back-up protection strategy, standby Self healing Strategy, timing, definite value, and is issued to and matches
Net protection controlling terminal；And the active self-healing of fault self-recovery and service restoration is realized for starting reclosing and prepared auto restart；
More specifically, being configured with the adaptive recognition algorithm model of network topology in distribution substation control device 1
(first and second network)；One or two correlation models；Adaptive guard configuration, strategy, logical algorithm；Self-healing control configuration, strategy,
Logical algorithm；System configuration language model；Distribution IED case history model etc..It is able to achieve adaptive guard function and from
More control function.
Wherein, adaptive guard function includes that main protection and back-up protection strategy, timing, definite value issue function.Main protection
To concentrate networking main protection function, and for according to primary network topology real-time update back-up protection policy mechanism, and it is issued to
Distribution network protection controlling terminal.Wherein, concentrated protection is as the main protection for realizing power distribution network in a manner of networking, the protection of use
Principle is the adaptive algorithms such as current differential protection and enclosed type current protection.
Self-healing control function mainly includes adaptive power network topology, the method for operation, starts reclosing and prepared auto restart realizes event
Hinder the active self-healing of self-healing and service restoration.It is provided simultaneously with " standby self-healing " strategy of network topology identification, timing, definite value issue
To distribution network protection controlling terminal.
The distribution network protection controlling terminal 3 is set in each power distribution station/switchyard of power distribution network, for sending on district substation
The real-time data acquisition information of the power distribution station/switchyard；And breaker/load that receiving area substation control device issues is opened
Action message is closed, corresponding movement, and report action implementing result are executed；And the time definite value issued for receiving area substation
Adjusting is as a result, realize that the cooperation of back-up protection and main protection and unit are autonomous.
Wherein, the network is the communication network of 100/1000Mbps Ethernet composition.Wherein, the power distribution station/switch
The real-time data acquisition information stood includes: folding condition information, bus and the route operation information of breaker or on-load switch, sets
Standby state-detection and fault warning information；Wherein, the bus and route operation information are busbar voltage sample information or route
Current sample information.
It is understood that it is different according to power distribution station/switchyard secondary device configuring condition, it is sent on terminal device real-time
Data acquisition information may be different.Wherein, power distribution station/switchyard breaker (on-load switch etc.) folding condition information is area
Network Topology for Real-Time modeling in domain substation provides Information base.This unit power distribution station/switchyard bus and route operation information according to
Secondary device configuring condition it is different may on send different information: in the unit of configuration voltage transformer, upper delivery power station/open
Close station busbar voltage sample information；In the route of configuration current transformer, upper delivery power station/switchyard line current sampling letter
Breath；Have discriminating direction and failure overcurrent judgement power distribution station/switchyard, should be able on send such as directional information and whether mistake
The data information of stream etc..This unit power distribution station/switchyard should be able on send Condition Detection and fault warning information, be region son
Stand operation management and formulate maintenance solution provide data supporting.
More specifically, may include protected subsystem, self-healing subsystem and subsystem in the control device of distribution substation；
And in distribution network protection controlling terminal include such as execution unit, combining unit and in-situ protection unit.
If Fig. 2 is an a kind of reality of network-based adaptive back-up protection control method of power distribution network provided by the invention
Apply the main flow schematic diagram of example；More detailed flow diagram in Fig. 3 is combined together.It is understood that the method is preceding
It states and is realized in the system of Fig. 1 introduction, which comprises
Step S10, the measuring value of distribution substation control device periodic receipt distribution network protection controlling terminal, and form distribution
The timing definite value coordinated scheme for protecting controlling terminal, is handed down to variant distribution network protection controlling terminal；(such as by infomational message
SV/GOOSE message etc.) inquiry mode, judge whether network intact, under network good situations, repeat work at present；Work as hair
When raw communication failure, distribution substation control device and distribution network protection controlling terminal are respectively detected under link failure, distribution substation
Control device is latched the main protection in communication failure region, and the standby on the spot that distribution network protection controlling terminal then starts corresponding region is protected
Shield；
Step S11, distribution network protection controlling terminal executes protection act and fault location as back-up protection main body, according to
Maximum load current definite value judges whether route breaks down, and different protection controlling parties is executed according to the difference of terminal type
Formula, the terminal type include circuit breaker terminal and on-load switch terminal；Wherein, maximum load current definite value can be good in communication
In good situation, obtained by distribution substation method of operation judging result.
Step S12, circuit breaker terminal carries out failure removal first, is needing mated condition between multiple circuit breaker terminals
When, it needs to carry out time cooperation to breaker, is cooperated by breaker and determine failure generation area；
Step S13, on-load switch terminal is according to the breaker actuation time, and whether judgement itself is in breaker excision failure
In range, if specified time range internal fault current vanishes, determine that on-load switch is in fault coverage, at this point, rapidly
Make on-load switch quartile；
Step S14, circuit breaker terminal (avoids load after cutting off failure, and after on-load switch quartile operation time limit
After switch quartile operation time limit), according to the operation time limit that distribution substation control device is adjusted, breaker reclosing is carried out, with
Gradually restore electricity；Wherein, the operation time limit after the adjusting of distribution substation by being stored among each terminal；
Step S15, on-load switch terminal judges whether fault current extinction time reaches itself and close after reclosing success
Lock time definite value controls this unit load switch coincidence (at this point, different site load terminals are pressed after reaching time definite value
Coincidence is carried out according to temporal definite value) so that power loss route is gradually recovered power supply；
Step S16, on-load switch terminal carries out overcurrent judgement after combined floodgate, judges fault element；Circuit breaker terminal is being cut
After failure, and after on-load switch quartile operation time limit, accelerates breaker reclosing, restore electricity；
Specifically, the step of judging fault element further comprises:
When overcurrent occurs in coincidence moment and disappears (fault zone circuit breaker terminal is acted again in tripping at this time), load is opened
It closes this unit load of terminal control and switchs quartile, judge fault element for on-load switch adjacent unit；
Occur after going through a period of time after coincidence overcurrent and disappear (at this time fault zone circuit breaker terminal act again in
Tripping), on-load switch terminal keeps this unit load to switch coincidence, judges fault element for the non-connected list of load switch downstream
Position.
Step S17, after meeting all on-load switch times of coincidence, faulty electric current is not generated yet, then determines current event
Barrier is transient fault；
Step S18, distribution substation control device according to the appearance-disappearance-occurs again-of the fault current disappear again when
Between, it is compared with the timing of all terminals adjusting relationship, finally determines fault point.
Implement the present invention, have it is following the utility model has the advantages that
In system and method provided by the invention, due to passing through network in distribution substation control device and distribution network protection control
Transmitting data information between terminal processed respectively has good registration property between protection, can adapt to distribution network topology automatically
Variation can pass through and the timing information for transmitting information between protection is guaranteed to protect and in the case where network failure occurs
The selectivity and reliability of shield.
The present invention makes full use of the ability of transmitted data on network information, substantially enhances the registration property between protection, energy
The variation of enough adaptive network topologys, and joined the timing information between information transmission, ensure that the selectivity of protection with
Reliability, thus rapidly and accurately excision, isolated fault region, and restore electricity in time for normal region, guarantee that power supply is reliable
Property.
Above disclosed is only a preferred embodiment of the present invention, cannot limit the power of the present invention with this certainly
Sharp range, therefore equivalent changes made in accordance with the claims of the present invention, are still within the scope of the present invention.
Claims (6)
1. a kind of adaptive back-up protection control system of network-based power distribution network characterized by comprising the control of distribution substation
Device and the multiple distribution network protection controlling terminals for passing through network connection with it, in which:
Distribution substation control device is set at distribution substation, and the network topology for being connected to distribution substation carries out certainly
Identification is adapted to, for determining main protection and back-up protection strategy, standby Self healing Strategy, timing, definite value, and is issued to distribution network protection
Controlling terminal；And the active self-healing of fault self-recovery and service restoration is realized for starting reclosing and prepared auto restart；
The distribution network protection controlling terminal is set in each power distribution station/switchyard of power distribution network, described for sending on district substation
Power distribution station/switchyard real-time data acquisition information；And the circuit breaker/load switch that receiving area substation control device issues is dynamic
Make information, executes corresponding movement, and report action implementing result；And the time definite value adjusting issued for receiving area substation
Cooperate between back-up protection and main protection as a result, realizing.
2. the system as claimed in claim 1, which is characterized in that the real-time data acquisition packet of the power distribution station/switchyard
Include: the folding condition information of breaker or on-load switch, bus and route operation information, Condition Detection and fault warning are believed
Breath；Wherein, the bus and route operation information are busbar voltage sample information or line current sample information.
3. the system as described in weighing and require 2, which is characterized in that the network is the communication network of 100/1000Mbps Ethernet composition
Network.
4. a kind of adaptive back-up protection control method of network-based power distribution network, which is characterized in that in such as claims 1 to 3
It is realized in the system of any one, which comprises
Step S10, the measuring value of distribution substation control device periodic receipt distribution network protection controlling terminal, and form distribution network protection
The timing definite value coordinated scheme of controlling terminal, is handed down to variant distribution network protection controlling terminal；When communication failure occurs, distribution
Substation control device and distribution network protection controlling terminal respectively detect under link failure that control device locking in distribution substation communicates event
Hinder the main protection in region, distribution network protection controlling terminal then starts the back-up protection on the spot of corresponding region；
Step S11, distribution network protection controlling terminal executes protection act and fault location, judges line according to maximum load current definite value
Whether road breaks down, and different protection control modes is executed according to the difference of terminal type, and the terminal type includes disconnected
Road device terminal and on-load switch terminal；
Step S12, circuit breaker terminal carries out failure removal first, when needing mated condition between multiple circuit breaker terminals, needs
Time cooperation is carried out to breaker, be cooperated by breaker and determine failure generation area；
Step S13, on-load switch terminal is according to the breaker actuation time, and whether judgement itself is in breaker excision fault coverage
It is interior, if it is decided that when being in fault coverage to on-load switch, to make on-load switch quartile rapidly；
Step S14, circuit breaker terminal is after cutting off failure, and after on-load switch quartile operation time limit, according to distribution substation
The operation time limit of control device adjusting, carries out breaker reclosing, gradually to restore electricity；
Step S15, on-load switch terminal is after reclosing success, when judging whether fault current extinction time reaches itself combined floodgate
Between definite value, after reaching time definite value, control this unit load switch coincidence so that power loss route is gradually recovered power supply；
Step S16, on-load switch terminal carries out overcurrent judgement after combined floodgate, judges fault element；Circuit breaker terminal is in excision event
After barrier, and after on-load switch quartile operation time limit, accelerates breaker reclosing, restore electricity；
Step S17, after meeting all on-load switch times of coincidence, faulty electric current is not generated yet, then determines that current failure is
Transient fault；
Step S18, distribution substation control device is according to appearance-disappearance-occurs again-time to disappear again of the fault current,
It is compared with the timing of all terminals adjusting relationship, finally determines fault point.
5. a kind of method as claimed in claim 4, which is characterized in that on-load switch terminal is after combined floodgate in the step S16
The step of carrying out overcurrent judgement, judging fault element further comprises:
When overcurrent occurs in coincidence moment and disappears, on-load switch this unit load of terminal control switchs quartile, judges fault element
For on-load switch adjacent unit；
Occurring overcurrent after going through a period of time after coincidence and disappears, on-load switch terminal keeps this unit load to switch coincidence,
Judge fault element for the non-adjacent unit of load switch downstream.
6. a kind of method as claimed in claim 5, which is characterized in that the step S16 further comprises::
If at the appointed time range internal fault current vanishes, determine that on-load switch is in breaker excision fault coverage.
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| CN109713794A (en) * | 2018-12-28 | 2019-05-03 | 广东电网有限责任公司 | A kind of distributed intelligence self recoverable system and method |
| CN110380515A (en) * | 2019-08-06 | 2019-10-25 | 上海金智晟东电力科技有限公司 | A kind of power distribution network Experimental Network monitoring system |
| CN111509859A (en) * | 2020-05-19 | 2020-08-07 | 广州穗华能源科技有限公司 | Low-voltage distribution network based on load space-time characteristics and physical topology identification method |
| CN111987701A (en) * | 2020-08-20 | 2020-11-24 | 广东电网有限责任公司 | Power distribution network maintenance method |
| CN112736872A (en) * | 2020-12-25 | 2021-04-30 | 贵州电网有限责任公司 | Power distribution network protection control strategy optimization method based on real-time analysis of operation mode |
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