CN110233478A - Supply network Millisecond method for fast reconstruction and system after electric network fault - Google Patents
Supply network Millisecond method for fast reconstruction and system after electric network fault Download PDFInfo
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- CN110233478A CN110233478A CN201910490040.1A CN201910490040A CN110233478A CN 110233478 A CN110233478 A CN 110233478A CN 201910490040 A CN201910490040 A CN 201910490040A CN 110233478 A CN110233478 A CN 110233478A
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- Prior art keywords
- breaker
- substation
- reconfigured quickly
- networking
- signal
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J13/00—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network
- H02J13/00006—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment
- H02J13/00019—Circuit arrangements for providing remote indication of network conditions, e.g. an instantaneous record of the open or closed condition of each circuitbreaker in the network; Circuit arrangements for providing remote control of switching means in a power distribution network, e.g. switching in and out of current consumers by using a pulse code signal carried by the network characterised by information or instructions transport means between the monitoring, controlling or managing units and monitored, controlled or operated power network element or electrical equipment using optical means
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/001—Methods to deal with contingencies, e.g. abnormalities, faults or failures
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02J—CIRCUIT ARRANGEMENTS OR SYSTEMS FOR SUPPLYING OR DISTRIBUTING ELECTRIC POWER; SYSTEMS FOR STORING ELECTRIC ENERGY
- H02J3/00—Circuit arrangements for ac mains or ac distribution networks
- H02J3/38—Arrangements for parallely feeding a single network by two or more generators, converters or transformers
- H02J3/388—Islanding, i.e. disconnection of local power supply from the network
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E60/00—Enabling technologies; Technologies with a potential or indirect contribution to GHG emissions mitigation
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/16—Electric power substations
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
Abstract
The present invention provides supply network Millisecond method for fast reconstruction and systems after a kind of electric network fault.Fast network reconstructs main website and collects power grid state information from the substation of substation or power plant, and is compared with the built-in control scheme list that may be broken down；When monitoring that anticipation grid disconnection failure occurs, combined floodgate pre-actuation signal is sent to the corresponding substation of multiple recoveries networking breaker；After fault clearance, substation is identified according to information on the spot to the moment is removed, and sends synchronizing close signal to the corresponding networking breaker that restores on the spot；Main website independently monitor the removing of failure simultaneously, restores networking breaker transmission standby synchronizing close signal to corresponding, realizes that be split power grid again grid-connected in 150ms after off-the-line based on above-mentioned mechanism.After power system restoration interconnection, the breaker for forming electromagnetic looped network is disconnected.
Description
Technical field
The present invention relates to supply network Milliseconds after power grid control technical field more particularly to a kind of electric network fault quickly to weigh
Structure method and system.
Background technique
After outer net accident or Intranet failure occur for regional power grid, due to the interruption of part supply path, it is possible to create the whole district
The isolated island of domain power grid or partial region power grid.When the power supply accounting lost is larger, power generation and load have biggish function in isolated island
Rate is poor, it is necessary to take the measure of the machine of cutting or cutting load to be just able to achieve the frequency stabilization of island-grid, this not only powers to production
It influences greatly, and the island-grid of temporary stabilization is still very high in the subsequent difficulty for maintaining continually and steadily to run.Therefore, in power grid
Because after isolated island occurs in failure, reconstructing new supply path rapidly, restore connectivity, the integrality of power grid, is formed as big as possible
Power grid, be guarantee continued power, stable power-supplying most direct measure.
After a loss of power due to loads such as motor, if voltage is lower than 0.8 times of voltage rating, the duration is more than 150ms, then
It can be by under-voltage protection tripping.Therefore, the fast recovery of power supply after forming isolated island should be able to be completed in 100ms.Existing power supply is fast
Speed switching device 10ms inner outlet usually after switch disconnects, 100ms is interior to complete power supply switching.However existing power supply is switched fast
Device has the disadvantage in that
(1) existing fast switching device can only obtain the information of bus on the spot or inlet wire, cannot supply from the point of view of the whole network
The recovery of power path, especially cannot according to distant place fault message, carry out multiple spot combined floodgate, therefore limit supply path recovery can
Road is gated, the probability for restoring power grid connectivity and integrality is reduced.
(2) conventional be essential fastly switch trip to be relied on or relevant protection signal enabling, however, when distant place system occurs for power grid
The outer failure of system, the region that normal power supplies apparatus for fast switching is monitored do not have switch motion, and apparatus for fast switching can not start, but
It is that frequency and voltage are collapsing, if being isolated not in time with failure system, and is switched to normal power source system, then failure electricity
The load that source is supplied will lose power supply.
(3) it the power supply selected on the spot the problem of there may be off-capacities, at this moment needs to select more power supplys in the distance
Capacity supports.
(4) there may be overload problems for single supply path, need multiple supply paths at this time.
(5) power supply is cut fastly in the presence of the possibility to fail because same period condition is unsatisfactory for requirement, after conventional single fast point of contact failure,
Defence line failure, no back-up measures are then entirely cut fastly.
In addition, the existing method for being referred to as electricity grid network reconstructing method or power grid self-healing, is all based on conventional open
Grid switching operation is closed, after electric network fault causes load to power off and has been shut down, then restore electricity；Therefore, this kind of solution cannot
Meet the requirement to restore electricity in 150ms after failure removal, can not achieve the loads such as motor and do not shut down the mesh to restore electricity
, therefore same range is not belonging to problem solved by the invention.
Summary of the invention
In view of this, the invention proposes supply network Millisecond method for fast reconstruction and systems after a kind of electric network fault.
According to an aspect of the present invention, supply network Millisecond method for fast reconstruction after a kind of electric network fault, institute are provided
The method of stating includes following characteristics step:
Step 1: main website is reconfigured quickly from the substation that is reconfigured quickly for being located at substation or power plant and collects monitored power grid
Whole status informations, and the fault set feature occurred with built-in possibility is compared, and judges whether monitored power grid has
Breaker cut-offs or the failure for causing breaker to cut-off occurs, i.e. progress grid disconnection failure real-time perception；
Step 2: when main website is reconfigured quickly and monitors to may cause the preset failure that breaker is cut-off and occurs, to the first kind
The substation that is reconfigured quickly where the corresponding multiple recovery networking breakers of breaker sends combined floodgate pre-actuation signal, wherein first
Class breaker is the breaker that possible cut-off；
Step 3: if main website, which is reconfigured quickly, monitors that outer net occurs off-the-line failure and collapsed, it is disconnected to disconnect the second class
Road device, while inspection same period conjunction is sent to the substation that is reconfigured quickly where the corresponding multiple recovery networking breakers of the second class breaker
Lock signal, wherein the second class breaker is outer net network interconnecting circuit；
Step 4: the substation that is reconfigured quickly for receiving combined floodgate pre-actuation signal identifies failure according to In situ Measurement information in real time
The moment is removed, when finding that failure is removed or removed, at once or to prolong specified time corresponding to first kind breaker
Restore networking breaker and sends synchronizing close signal；
Step 5: first kind breaker in main website real-time monitoring network-wide basis is reconfigured quickly cut-offs signal, a certain when finding
When first kind breaker cut-offs or cut-off, at once or prolong specified time to the corresponding multiple recovery connection of first kind breaker
Net breaker sends standby synchronizing close signal；
Step 6: the inspection same period of synchronizing close and inspection locking execute: checking to be closed a floodgate whether restore networking breaker two sides
Meet asynchronous switch-on condition and whether there is no troubles inside the sample spaces to be latched, and backup power source failure locking is not present, if full
Foot requires, then closes a floodgate to recovery networking breaker transmission and execute signal；
Step 7: after power system restoration interconnection, disconnecting the recovery networking breaker of overcurrent or carry out current limliting；
Step 8: unlocking existing high and low electromagnetic circle net；
Step 9: the reset of system is reconfigured quickly in supply network: 200ms after the completion of step 8, supply network, which is reconfigured quickly, is
Each device of uniting resets, and return step 1 monitors next grid disconnection event.
According to another aspect of the present invention, based on described method provide supply network Millisecond after a kind of electric network fault is fast
Fast reconfiguration system, system include that main website is reconfigured quickly and substation is reconfigured quickly, wherein main website, substation are based on meeting national standard and row
Hardware device and the platform that desired power system security is surely controlled are marked to realize, the hardware performance of main website and substation meets following item
Part: substation power frequency recorder data sample rate is not less than 1200Hz, and the substation metric data calculation processing period is not more than 0.83ms, main
It stands and substation information period and instruction scan period is no more than 1.67ms, the communication in system between device uses 2M data
Hardwire is respectively adopted from the metric data such as collection voltages, electric current on protection CT and PT in private network, main website and substation.
Technical effect:
(1) the tactful main website for concentrating the whole network key message is set up, is believed by the equipment that main website obtains each power supply area of the whole network
Breath, and incipient fault, the corresponding multiple breakers of control incipient fault are determined according to facility information and network topology.According to this hair
The supply network method for fast reconstruction of bright embodiment realizes the fast quick-recovery of 10ms grade of supply path from the angle of the whole network: determining
Incipient fault corresponding multiple breakers can control multiple breakers when incipient fault occurs, and realize more
The rapid closing of a grid entry point improves the success rate that the power system restoration of off-the-line is networked, to realize that motor, station service etc. are negative
Lotus does not shut down continuous operation.Multiple spot combined floodgate is also beneficial to, caused each open circuit different using different busbar voltage change procedures
The different feature of same period condition of device closing a floodgate improves power system restoration interconnection success rate；Multiple spot combined floodgate also reduces new access power supply and turns to supply
A possibility that path overcurrent.
(2) main website networks when monitoring that the incipient fault that breaker can be caused to cut-off is actually occurred to relevant recovery
Breaker substation issues pre-actuation signal, when being judged the removing of failure in a distant place according to In situ Measurement information by the substation of pretrigger
It carves, i.e. the first kind or the second class breaker is cut-off the moment, then actively start the asynchronous switch-on for restoring networking breaker on the spot, from
And avoid relying on the combined floodgate that distant place communication starting restores networking breaker after off-the-line occurs for power grid, when saving distant place communication
Between.
(3) main website is when the voltage for detecting the minimum bus of voltage restores normal, to the corresponding substation of the multiple open circuit
Send rapid closing signal.In this way, can pass through if substation does not judge that the voltage of the minimum bus of voltage restores normal successfully
The rapid closing signal that main website is sent is remedied.
(4) trigger signal using the tripping outlet signal of protection or automatic device as rapid closing, by certain
Delay, it is ensured that faulty grids breaker first disconnects failure, and auxiliaries-supply circuit-breaker closes a floodgate again, avoids the open circuit due to faulty grids
Device, which is not fully disconnected to cause to close a floodgate, to fail.
(5) when failure (outer net collapse) outside remote system, the area that normal power supplies apparatus for fast switching is monitored occur for power grid
Domain does not have switch motion, and apparatus for fast switching can not start；But frequency and voltage are collapsing, side according to the present invention
Method and can be switched to normal power source system in time with failure system active isolation, guarantee the stability and normal fortune of power grid
Row.
(6) method of above embodiment according to the present invention, when multiple breaker closings are successfully formed electromagnetic looped network, energy
Enough timely off-the-line electromagnetic looped networks, make power grid operation.
According to below with reference to the accompanying drawings becoming to detailed description of illustrative embodiments, other feature of the invention and aspect
It is clear.
Detailed description of the invention
Comprising in the description and constitute the attached drawing of part of specification and specification together illustrate it is of the invention
Exemplary embodiment, feature and aspect, and principle for explaining the present invention.
Fig. 1 shows the physical structure block diagram that system is reconfigured quickly in supply network according to an embodiment of the invention.
Fig. 2 shows the flow charts of supply network method for fast reconstruction after electric network fault according to an embodiment of the invention.
Schematic diagram is reconfigured quickly in supply network when Fig. 3 shows regional power grid internal fault.
Schematic diagram is reconfigured quickly in supply network when Fig. 4 shows outer net distant place off-the-line failure.
Specific embodiment
Below with reference to attached drawing various exemplary embodiments, feature and the aspect that the present invention will be described in detail.It is identical in attached drawing
Appended drawing reference indicate element functionally identical or similar.Although the various aspects of embodiment are shown in the attached drawings, remove
It non-specifically points out, it is not necessary to attached drawing drawn to scale.
Dedicated word " exemplary " means " being used as example, embodiment or illustrative " herein.Here as " exemplary "
Illustrated any embodiment should not necessarily be construed as preferred or advantageous over other embodiments.
In addition, in order to better illustrate the present invention, numerous details is given in specific embodiment below.
It will be appreciated by those skilled in the art that without certain details, the present invention equally be can be implemented.In some instances, for
Method, means, element and circuit well known to those skilled in the art are not described in detail, in order to highlight purport of the invention.
In order to solve normal power supplies apparatus for fast switching, the present invention provides after a kind of electric network fault
Supply network method for fast reconstruction, supply network method for fast reconstruction can be applied to supply after the electric network fault of the embodiment of the present invention
System is reconfigured quickly in electric network.
Fig. 1 shows the physical structure block diagram that system is reconfigured quickly in supply network according to an embodiment of the invention.Such as Fig. 1 institute
Show, it may include that main website is reconfigured quickly (below that system (hereinafter referred to as system), which is reconfigured quickly, in the supply network of the embodiment of the present invention
Abbreviation main website) and be reconfigured quickly substation (hereinafter referred to as substation), wherein main website, substation can be based on meeting national standard and rower is wanted
The hardware and software platform for the power system security stabilization control device asked realizes that the hardware performance of main website and substation meets following item
Part: substation power frequency recorder data sample rate is not less than 1200Hz, and the substation metric data calculation processing period is not more than 0.83ms, main
It stands and substation information period and instruction scan period is no more than 1.67ms, the communication in system between device uses 2M data
Hardwire is respectively adopted from protection CT (current transformer, current transformer) and PT (electricity in private network, main website and substation
Press mutual inductor, potential transformer) on the metric data such as collection voltages, electric current, circuit breaker trip signal passes through hard
Wiring is directly output to circuit breaker actuating mechanism.
In one possible implementation, main website can be set in the load-center substation of regional power grid, and main website is for receiving
Collect the facility information of the whole network and carry out centralized decision-making, substation can be set has the different power supply areas of contact disconnected in regional power grid
The substation or power plant of road device or busbar breaker, substation is responsible for acquiring the facility information in substation or power plant, for example, electric
The information such as pressure, electric current, substation are also responsible for executing the instruction that main website is sent.It may include multiple in the system of the embodiment of the present invention
Different substations is each responsible for the acquisition of the equipment electric state information of different power supply area substations or power plant.
In one possible implementation, developer can pre-select and set according to the analysis to supply network
It is (fast by supply networks such as relay protection or stability control devices to set the breaker i.e. first kind breaker for needing the possibility monitored will disconnect
The breaker that device other than fast reconfiguration system disconnects) and the second class breaker (system itself is reconfigured quickly by supply network to break
The breaker opened), and network breaker with its (breaker that may will disconnect) associated recovery；System can recorde can
The breaker and the incidence relation associated with it restored between networking breaker that can be will disconnect；In system monitoring to may
When the breaker of disconnection disconnects, associated recovery networking breaker can be obtained according to incidence relation, control associated recovery connection
Net breaker rapid closing.In alternatively possible implementation, system can also in main website based on circuit-breaker status into
The Network Topology for Real-Time of row supply network is analyzed, the online breaker for needing the possibility monitored will disconnect and associated of determining
Restore networking breaker, and according to the movement of the information control breaker real-time monitored.
Fig. 2 shows the flow charts of supply network method for fast reconstruction after electric network fault according to an embodiment of the invention, should
Method can be applied to main website and substation in Fig. 1 system, specifically includes the following steps:
Step 1: main website is reconfigured quickly (can also claim from the monitored power grid of the substation collection for being located at substation or power plant
Make by control power grid) whole status informations, and the fault set feature occurred with built-in possibility is compared, and judges to be monitored
The power grid off-the-line failure that whether there is breaker to cut-off or breaker will be caused to cut-off, i.e. progress grid disconnection failure is real-time
Perception；
Substation is reconfigured quickly and realizes that the acquisition to electric information in plant stand measures by hardwire, it will be sub by network communication
Stand metrical information, decision information Shang Song main website and receive combined floodgate pre-actuation signal, switching signal that main website issues on the spot；Quickly weight
Structure substation carries out the judgement of breaker triggering logic on the spot and the judgement of breaker asynchronous switch-on logic, by hardwire to disconnected
Road device provides combined floodgate or trip signal.
Main website is reconfigured quickly, key equipment in the power grid that each plant stand measurement obtains is collected from each substation by communication network
Information simultaneously carries out concentration analysis decision, and Active Splitting signal, combined floodgate pre-actuation signal, switching signal are then handed down to each son
It stands.Furthermore the function that substation is reconfigured quickly of plant stand where main website also undertakes.
Wherein have to information collection and transmission that main website and substation is reconfigured quickly claimed below:
S2-1 substation) is reconfigured quickly and realizes that the acquisition to electric information in plant stand measures by hardwire；
S2-2 the transmission for carrying out information and instruction between main website and substation by network communication) is reconfigured quickly；For example, by using 2M
Special communication network；
S2-3 substation power frequency recorder data sample rate) is reconfigured quickly not less than 1200Hz；
S2-4 the substation data calculation processing period) is reconfigured quickly no more than 0.83ms；
S2-5 information period and instruction scan period) is reconfigured quickly between main website and substation no more than 1.67ms；
S2-6 it includes: circuit breaker position, trip protection letter that substation, which) is reconfigured quickly, in the switching value that substation or power plant acquire
Number, stability control device trip signal；
S2-7 the voltage that substation includes: critical busses in the analog quantity that substation or power plant acquire, external power) is reconfigured quickly
Route, transformer branch, generator branch, stand between interconnector or the electric current and voltage of mother.Wherein, breaker will be caused to open
Disconnected failure includes, but are not limited to following failures:
S3-1) short trouble；
S3-2) over current fault；
S3-3) power or voltage oscillation failure；
S3-4) outer net distant place off-the-line forms isolated network.
Wherein, short trouble, over current fault, power or voltage oscillation failure will trigger relay protection or power grid surely controls dress
It the corresponding breaker of disconnections such as sets, grid disconnection is caused to form isolated island, claim this kind of by non-confessions such as relay protection, power grid stability control devices
The breaker of system disconnection is reconfigured quickly in electric network, and will appear the disconnected of the island-grid without containing primary fault after disconnecting
Road device is first kind breaker.
When outer net distant place off-the-line formation isolated network occurs, the power grid that system will actively be monitored is reconfigured quickly by supply network
It carries out cut-offfing off-the-line at interconnection breaker with outer net, is monitored power grid and forms isolated island, claim this kind of by system master is reconfigured quickly
The breaker that dynamic circuit breaker is opened is the second class breaker.
Step 2: when main website, which monitors to may cause the preset failure that breaker is cut-off, to be occurred, open circuit that Xiang Keneng is cut-off
The corresponding multiple substation transmission combined floodgate pre-actuation signals restored where networking breaker of device, that is, first kind breaker；
Wherein, the method that monitoring may cause the preset failure that breaker is cut-off is:
S4-1 main website) is reconfigured quickly and assesses each busbar voltage in monitored power grid in real time, when minimum bus electricity therein
When forcing down in first voltage threshold value, and continuing first time period threshold value, select the corresponding bus of the minimum busbar voltage as therefore
Hinder bus；The present invention is preferably 0.5 times of voltage rating first voltage threshold value, and first time period threshold value is preferably 10ms.
S4-2) according to the size for each branch current being connected with fault bus, select the maximum branch of electric current as failure
Branch, the breaker on fault branch close to fault bus is as first kind breaker；
S4-3) if failure occurs on bus, a first kind breaker is still determined using the method for S4-2.
Wherein, restore networking breaker to have the feature that
S5-1 island-grid and other power grids can be linked together by closing operation by) restoring networking breaker；
S5-2 after) restoring networking breaker closing, overcurrent protection movement, the present invention are not triggered in second time period threshold value
It is preferably 20s by second time period threshold value.；
S5-3) if the isolated island formed for some first kind breaker or the second class breaker has multiple recoveries networking open circuits
Device, and these restore networking breaker and adhere to three or three aboves separately, then only retain two voltage class of highest
Recovery network breaker.
S5-4) substation is reconfigured quickly in each recovery networking breaker ownership one, and main website, which issues, restores networking breaker
Instruction is forwarded by the way that substation is reconfigured quickly.
When attached drawing 3 provides a regional power grid internal fault, schematic diagram that supply network is reconfigured quickly.Area as shown in Figure 3
4# decompression becomes branch trouble in the power grid of domain, in the case of protecting 304 breaker of tripping, should select quickly to close according to the method for the present invention
The recovery networking breaker of lock are as follows: 3200 mothers of 35kV, 6101 mothers, 6102 mothers, 6103 mothers of 6kV.Wherein, 6kV
Mother has a large amount of induction-motor loads due to remote from failure, therefore phase angle difference is generally also less than between 35kV bus between 6kV bus
Phase angle difference, mother asynchronous switch-on success rate are higher；Again while 3 6kV mothers of selection are the reason of combined floodgate: when 3200 mothers are closed
Lock is unsuccessful, if only realizing rapid closing, such as 6101 breaker closings with 1 6kV mother, then 35kV III section pass through 2#,
1# transformer is powered IV sections of 35kV of three groups of loads, transformer may over-current and -load, therefore using allowing 3 6kV mothers
A possibility that simultaneously participating in rapid closing, each 35/6kV transformer overcurrent overload can be mitigated.
Actually each bus is since the induction-motor load or generator of institute's band are different, different at a distance from fault point, electricity
The case where pressure amplitude value and phase angle change, is also different, at certain between being unsatisfactory for cutting asynchronous switch-on condition fastly bus, between other buses
It is likely to just meet asynchronous switch-on condition, therefore power supply is switched fast trial and can be improved quickly simultaneously between different buses
The success rate of switching.
Step 3: if main website monitors that outer net occurs (isolated island) off-the-line failure and collapsed, it is disconnected to disconnect outer net contact
Road device, i.e. the second class breaker, while being sent to the substation where the corresponding multiple recovery networking breakers of the second class breaker
Synchronizing close signal；
Wherein it is determined that outer net occurs isolated island off-the-line failure and has collapsed needs while having met following whole criterions:
S6-1) the frequency departure rated frequency (50Hz) for the bus that outer net interconnector is connected is more than first frequency deviation
Threshold value；First frequency deviation threshold is preferably 0.1Hz by the present invention；
S6-2) frequency for the bus that outer net interconnector is connected and backup power source region bus frequency departure are more than second
Frequency departure threshold value；Second frequency deviation threshold is preferably 0.2Hz by the present invention；
S6-3) backup power source region bus frequency is within the scope of first frequency；The present invention is preferred by first frequency range
For 49Hz~51Hz；
S6-4) frequency change rate for the bus that outer net interconnector is connected is more than first frequency change rate threshold value；This hair
Bright by first frequency change threshold is preferably 0.2Hz/s；
S6-5) above-mentioned condition is satisfied, and the duration is greater than third period threshold value；The present invention is by the third time
Section threshold value is preferably 150ms.
In step 3 when main website monitors that outer net occurs isolated island off-the-line failure and collapsed, following signals is sent:
S8-1) main website sends trip signal to outer net network interconnecting circuit, i.e. the second class breaker；
S8-2 it) is delayed after 5 milliseconds, is sent to the substation where the corresponding multiple recovery networking breakers of the second class breaker
Synchronizing close signal.
It is identical as step 2 to the requirement for restoring networking breaker in step 3.
When failure (outer net collapse) outside remote system occurs for power grid, the region that normal power supplies apparatus for fast switching is monitored does not have
There is switch motion, apparatus for fast switching can not start, but frequency and voltage are collapsing, confession according to the present embodiment
Electric network method for fast reconstruction and can be switched to normal power source system, guarantee power grid in time with failure system active isolation
Stability and normal operation.
Schematic diagram is reconfigured quickly in supply network when attached drawing 4 shows outer net distant place off-the-line failure.As shown in figure 4, JJN outer net
Distant place failure makes distant place circuit breaker trip, leads to JJN outer net and bulk power grid off-the-line, forms a wide range of isolated island electricity with regional power grid
Net, but since 112 interconnection switches are not turned off, normal power supplies apparatus for fast switching cannot be activated, island-grid is not
The fast conjunction that 100 breakers can be passed through, is multiplexed into the XJZ outer net of normal power supply.Method of the invention can under outer net Runin Banished condition
Actively to disconnect 112 breakers, to trigger quick power switching, then 100 mothers of 110kV voltage class are closed in selection fastly simultaneously
3000 mothers of connection and 35kV voltage class, by the regional power grid rapid closing of isolated island to XJZ power grid, due to switching in
It can be completed in 150ms, therefore isolated island can be eliminated in the case where load keeps continuous operation.Emulation and actual measurement show
Under outer net fault condition, mutually in the same time, since 110kV mother distance fault is close, the phase angle difference between 110kV bus is logical
The phase angle difference being often greater than between 35kV bus, therefore 3000 breakers realize successful 100 breaker of likelihood ratio of synchronizing close
It is high.
Step 4: the substation for receiving combined floodgate pre-actuation signal identifies the fault clearance moment according to In situ Measurement information in real time,
When finding that failure is removed or removed, at once or prolongs specified time and network and break to corresponding recoverys of first kind breaker
Road device sends synchronizing close signal；Here plant stand where failure and first kind breaker is not limited to this substation, further includes remote
The failure and first kind breaker of other plant stands of side.
The substation of combined floodgate pre-actuation signal is received in step 4, and moment or just is removed using following methods identification failure
It is being removed, and is sending synchronizing close letter to corresponding (where substation is originally reconfigured quickly in plant stand) recovery networking breaker
Number:
S10-1) if substation and first kind breaker are in same plant stand, substation by hardwire directly receive this first
The trip signal of class breaker, after receiving trip signal, substation is at once to the corresponding recovery networking of the first kind breaker
Breaker sends synchronizing close signal；
S10-2) if substation and first kind breaker are in same plant stand, substation by hardwire directly receive this first
The tripping that the automatic devices such as the relevant protective device of class breaker or stability control device issue exports signal；It is exported when receiving tripping
After signal, substation the 4th period threshold value of delay sends inspection same period conjunction to the corresponding recovery networking breaker of the first kind breaker
Lock signal；4th period threshold value is preferably 5ms by the present invention；
S10-3) if substation and first kind breaker be not in same plant stand, substation is by receiving combined floodgate in monitoring station
The state of the both end voltage of the breaker of pre-actuation signal, at the time of judging that failure is removed；When judgement, which is out of order, is removed,
Substation sends synchronizing close signal to the corresponding recovery networking breaker of the first kind breaker at once.
According to the state of the both end voltage of breaker, judge that the specific method is as follows at the time of failure is removed:
S11-1) voltage in two side bus that the breaker that substation real-time monitoring receives combined floodgate pre-actuation signal is connected
Compared with the busbar voltage Uy of downside；
S11-2) when Uy is greater than 0.9 times of voltage rating or voltage is increased more than 0.1 times of voltage rating in 20ms, recognize
Removed for failure, record the moment be failure by clear except the moment.
In the present invention referring to " at once " relative to substation receive first kind breaker cut-off occur the moment delay answer
No more than 5ms.
The case where for attached drawing 3, when 4#, which is depressured, becomes branch, short-circuit, the preparatory trigger bit of the main website of 110kV/35kV electric substation
In the substation of 35kV/6kV distribution substation, when substation monitors that I sections of 6kV of voltage restores, then 304 switch of explanation is jumped by protection
It opens, therefore the operation for quickly closing 6kV mother can be carried out, it is not necessary to which the switching signal for waiting main websites to send saves several milliseconds logical
Believe the time, is conducive to the satisfaction of synchronizing close condition in subsequent step 6.
Step 5: first kind breaker cut-offs signal in main website real-time monitoring network-wide basis, when finding that a certain first kind is disconnected
When road device cut-offs or cut-off, at once or prolong specified time to the corresponding multiple recovery networking breakers of first kind breaker
Send standby synchronizing close signal.The specific method is as follows:
S12-1) by communication network, each first kind breaker out of substation real-time reception network-wide basis cut-offs signal for main website
Or the trip signal of the associated protective device of first kind breaker or stability control device；
S12-2) main website is by the way that each first kind breaker cut-offs signal or first in plant stand where hardwire real-time reception
The trip signal of the associated protective device of class breaker or stability control device；
S12-3 at once disconnected to the first kind by communication network) when main website monitors that a certain first kind breaker is cut-off
Device corresponding multiple substations for restoring networking breaker in road send synchronizing close signal, these, which restore networking breaker, to belong to
In different control sub-station or plant stand；
S12-4) when main website monitors that protection or stability control device send trip signal to a certain first kind breaker, delay
5ms sends synchronizing close letter to the corresponding multiple substations for restoring networking breaker of the first kind breaker by communication network
Number, these, which restore networking breaker, may belong to different control sub-station or plant stand.Using the jump of protective device or automatic device
When lock exports trigger signal of the signal as synchronizing close, pass through certain delay, it is ensured that faulty grids breaker first disconnects
Failure, auxiliaries-supply circuit-breaker close a floodgate again, avoid not being fully disconnected due to the breaker of faulty grids, cause backup power source
It closes a floodgate onto failure, fault coverage is caused to expand.
S12-5) when substation has been sent from synchronizing close signal, and the synchronizing close signal that substation is sent is held
Row, then the synchronizing close signal of main website is ignored；Otherwise, the synchronizing close signal of main website is executed；That is the inspection same period of main website
Switching signal is the standby signal of the synchronizing close signal of substation.
In the present invention referring to " at once " relative to main website receive first kind breaker cut-off occur the moment delay answer
No more than 5ms.
For example, main website is reconfigured quickly when receiving following signals, is delayed through following corresponding setting, to associated conjunction
The control sub-station of lock breaker sends rapid closing signal:
(5.1) main website plant stand inner breaker trip signal on the spot, it is no-delay；
(5.2) the main website tripping outlet signal that the associated protection of plant stand inner breaker or automatic device issue on the spot or reconstruct
The tripping that main website Active Splitting module issues exports signal, and be delayed 30ms；
(5.3) distant place plant stand circuit breaker trip signal, it is no-delay；
(5.4) tripping that the associated protection of distant place plant stand inner breaker or automatic device issue exports signal, and be delayed 10ms；
Substation is reconfigured quickly when receiving following signals, is delayed through following corresponding setting, to associated combined floodgate breaker
This substation control module send rapid closing signal:
(5.5) the rapid closing signal that main website issues substation is reconfigured quickly, it is no-delay；
(5.6) substation plant stand inner breaker trip signal on the spot is reconfigured quickly, it is no-delay；
(5.7) the substation tripping that the associated protection of plant stand inner breaker or automatic device issue on the spot is reconfigured quickly and goes out message
Number or reconstruct main website Active Splitting module issue tripping export signal, be delayed through 30ms；
(5.8) the combined floodgate pre-trigger instruction to certain breaker is received in step 3 if substation is reconfigured quickly, supervised in real time
Survey the bus of voltage in two side bus that the breaker is connected compared with downside, when the busbar voltage be greater than 0.9 times of voltage rating or
Person's voltage in 20ms increases more than 0.1 times voltage rating, then no-delay, issues rapid closing to the control module of the breaker
Signal.
Since being fully disconnected for breaker needs time of a few tens of milliseconds, gone out using protection or the tripping of automatic device
Trigger signal of the message number as rapid closing realizes that faulty grids breaker first disconnects failure by certain delay, spare
Power circuit breaker closes a floodgate again.
The case where for attached drawing 3, when 4#, which is depressured, becomes branch, short-circuit, the preparatory trigger bit of the main website of 110kV/35kV electric substation
In the substation of 35kV/6kV distribution substation, when substation does not sentence 304 tripping out successfully, then the switching signal that main website is remotely sent becomes
Standby remedial measure.
Step 6: the inspection same period of synchronizing close and inspection locking execute.It checks to be closed a floodgate and whether restores networking breaker two sides
Meet asynchronous switch-on condition and whether there is no troubles inside the sample space locking and backup power source failure lockings, if being all satisfied requirement,
The execution signal that closes a floodgate is sent to networking breaker is restored.
Wherein, the asynchronous switch-on condition for restoring networking breaker is to meet following require simultaneously:
S15-1) restore networking breaker two sides phase difference of voltage < 20 °；
S15-2) restore networking breaker two sides frequency difference and be less than 1Hz；
S15-3) restore networking less than 0.2 times voltage rating of breaker two sides voltage pair value difference.
Restore networking breaker and meet following either condition in the node voltage of isolated island area side, then generates to the breaker
Troubles inside the sample space locking:
S16-1) there are phase voltages to be respectively less than 0.7 times of voltage rating；
S16-2) in three-phase voltage amplitude, maximum value and minimum differ by more than 30%.
Restore networking breaker and meet following either condition in the node voltage and frequency of standby electricity source, then generates to this
Restore the backup power source failure locking of networking breaker:
S17-1) phase voltage is except 0.85~1.2 times of nominal value range；
S17-2) frequency is outside 49.2Hz~50.8Hz range.
Step 7: after power system restoration interconnection, disconnecting the recovery networking breaker of overcurrent or carry out current limliting.Method is: if restoring
The electric current of breaker is more than to allow current threshold, and continue the 5th period threshold value or more after networking breaker closing, then disconnects
Breaker triggers the corresponding high-speed switch in the substation and enters high impedance status；5th period threshold value is preferably by the present invention
100ms。
Here instantaneous over-current can be realized being reconfigured quickly inside device；According to overcurrent current limliting scheme, then need to add
High-speed switch is filled, for this switch when electric current is greater than some definite value, the reactance of switch becomes a very big value from 0, to rise
To the purpose of limitation electric current.
Step 8: existing high and low electromagnetic circle net is unlocked, method is:
19-1) after step 6 issues and closes a floodgate execution signal, if the first kind breaker and the second class breaker that should trip
"on" position is remained as, and continues the 6th period threshold value, then issues trip command to these breakers；When the present invention is by the 6th
Between section threshold value be preferably 150ms；
19-2) after step 6 issues and closes a floodgate execution signal, if the recovery networking breaker of voltage levels is closing success
State, and continue the 6th period threshold value, then it is issued to the recovery of the closing success of whole lower voltage grades networking breaker
Trip command；6th period threshold value is preferably 150ms by the present invention.
It should be noted that it is above-mentioned selected cut-off breaker, if the following conditions are met, then without cut-offfing, these are not joined
Selection with the breaker cut-off can be realized by being arranged offline or be realized by online topological analysis:
If 19-3) disconnection of low-voltage circuit breaker reduces the access amount of external power, do not trip the low-voltage circuit breaker；
If 19-4) outer net is single power supply, it is impossible to form the high-low pressure electromagnetism ring of power grid in outer net penetration power region
Net.
The case where for attached drawing 3, executes after signal issues closing a floodgate, if detect 3200 breaker closings of 35kV at
Function, and continue 150ms, then disconnect 6101,6102 and 6103 breakers of 6kV.
The case where for attached drawing 4, executes after signal issues closing a floodgate, if check 100 breaker closings of 110kV at
Function, and continue 150ms, then disconnect 3000 breakers of 35kV.
Step 9: the reset of system is reconfigured quickly in supply network.200ms after the completion of step 8, supply network, which is reconfigured quickly, is
Each device of uniting resets, and return step 1 monitors next grid disconnection event.
Using the above method of the invention, may be implemented to restore to be split in longest 150ms after off-the-line occurs for power grid
Isolated network it is grid-connected, to guarantee induction-motor load after a loss of power, restore grid-connected normal operation under non-stop-machine state.
Various embodiments of the present invention are described above, above description is exemplary, and non-exclusive, and
It is not limited to disclosed each embodiment.Without departing from the scope and spirit of illustrated each embodiment, for this skill
Many modifications and changes are obvious for the those of ordinary skill in art field.The selection of term used herein, purport
In the principle, practical application or improvement to the technology in market for best explaining each embodiment, or make the art
Other those of ordinary skill can understand each embodiment disclosed herein.
Claims (26)
1. supply network Millisecond method for fast reconstruction after a kind of electric network fault, which is characterized in that the method includes following spies
Levy step:
Step 1: main website is reconfigured quickly from the substation that is reconfigured quickly for being located at substation or power plant and collects the complete of monitored power grid
Portion's status information, and the fault set feature occurred with built-in possibility is compared, and judges whether monitored power grid has open circuit
Device cut-offs or the failure for causing breaker to cut-off occurs, i.e. progress grid disconnection failure real-time perception；
Step 2: when main website is reconfigured quickly and monitors to may cause the preset failure that breaker is cut-off and occurs, to first kind open circuit
The substation that is reconfigured quickly where the corresponding multiple recovery networking breakers of device sends combined floodgate pre-actuation signal, wherein the first kind is disconnected
Road device is the breaker that possible cut-off；
Step 3: if main website, which is reconfigured quickly, monitors that outer net occurs off-the-line failure and collapsed, disconnecting the open circuit of the second class
Device, while synchronizing close is sent to the substation that is reconfigured quickly where the corresponding multiple recovery networking breakers of the second class breaker
Signal, wherein the second class breaker is outer net network interconnecting circuit；
Step 4: the substation that is reconfigured quickly for receiving combined floodgate pre-actuation signal identifies fault clearance according to In situ Measurement information in real time
Moment at once or prolongs specified time to the corresponding recovery of first kind breaker when finding that failure is removed or removed
Breaker of networking sends synchronizing close signal；
Step 5: first kind breaker in main website real-time monitoring network-wide basis is reconfigured quickly cut-offs signal, when discovery a certain first
When class breaker cut-offs or cut-off, at once or to prolong specified time disconnected to the corresponding multiple recoveries networking of first kind breaker
Road device sends standby synchronizing close signal；
Step 6: the inspection same period of synchronizing close and inspection locking execute: checking to be closed a floodgate and restore whether networking breaker two sides meet
Asynchronous switch-on condition and whether there is no troubles inside the sample space be latched, and be not present backup power source failure locking, wanted if being all satisfied
It asks, then sends the execution signal that closes a floodgate to recovery networking breaker；
Step 7: after power system restoration interconnection, disconnecting the recovery networking breaker of overcurrent or carry out current limliting；
Step 8: unlocking existing high and low electromagnetic circle net；
Step 9: the reset of system is reconfigured quickly in supply network: 200ms after the completion of step 8, it is each that system is reconfigured quickly in supply network
Device resets, and return step 1 monitors next grid disconnection event.
2. supply network Millisecond method for fast reconstruction after a kind of electric network fault according to claim 1, which is characterized in that
In step 1 to main website is reconfigured quickly and be reconfigured quickly the information collection of substation and transmission have it is claimed below:
S2-1 substation) is reconfigured quickly and realizes that the acquisition to electric information in plant stand measures by hardwire；
S2-2 main website) is reconfigured quickly and the transmission for carrying out information and instruction between substation by network communication is reconfigured quickly；
S2-3 substation power frequency recorder data sample rate) is reconfigured quickly not less than 1200Hz；
S2-4 the substation data calculation processing period) is reconfigured quickly no more than 0.83ms；
S2-5 main website) is reconfigured quickly and be reconfigured quickly between substation information period and instruction scan period no more than
1.67ms；
S2-6) be reconfigured quickly substation the switching value that substation or power plant acquire include: circuit breaker position, trip protection signal,
Stability control device trip signal；
S2-7 the voltage that substation includes: critical busses in the analog quantity that substation or power plant acquire, external power line) is reconfigured quickly
Road, transformer branch, generator branch, stand between interconnector or the electric current and voltage of mother.
3. supply network Millisecond method for fast reconstruction after a kind of electric network fault according to claim 1, which is characterized in that
In step 1, main website is being reconfigured quickly, according to collected electric network information, is judging whether there is breaker and cut-off or will cause to break
The failure that road device is cut-off occurs, wherein the failure for causing breaker to cut-off is included, but are not limited to following failures:
S3-1) short trouble；
S3-2) over current fault；
S3-3) power or voltage oscillation failure；
S3-4) outer net distant place off-the-line forms isolated network；
Wherein, short trouble, over current fault, power or voltage oscillation failure are reconfigured quickly supply network is triggered other than system
Device disconnects corresponding first kind breaker, and grid disconnection is caused to form isolated island, and will appear one after disconnecting without containing original
The island-grid of failure, it includes: relay protection, power grid stability control device that the device other than system, which is reconfigured quickly, in supply network；
When outer net distant place off-the-line occurring forming isolated network, system is reconfigured quickly actively for the power grid monitored and outer by supply network
Net cut-offs off-the-line at i.e. the second class breaker at interconnection breaker, is monitored power grid and forms isolated island.
4. supply network Millisecond method for fast reconstruction after a kind of electric network fault according to claim 1, which is characterized in that
The method that monitoring may cause the preset failure that breaker is cut-off in step 2 is:
S4-1 main website) is reconfigured quickly and assesses each busbar voltage in monitored power grid in real time, when minimum busbar voltage therein is low
In first voltage threshold value, and when continuing first time period threshold value, select the corresponding bus of the minimum busbar voltage as failure mother
Line；
S4-2) according to the size of each branch current being connected with fault bus, select the maximum branch of electric current as fault branch,
Breaker on fault branch close to fault bus is as first kind breaker；
S4-3) if failure occurs on bus, a first kind breaker is still determined using the method for S4-2).
5. supply network Millisecond method for fast reconstruction after a kind of electric network fault according to claim 1, which is characterized in that
Recovery networking breaker in step 2 and step 3 has the feature that
S5-1) restore networking breaker by closing operation, island-grid and other power grids are linked together；
S5-2 after) restoring networking breaker closing, overcurrent protection movement is not triggered in second time period threshold value；
S5-3) if the isolated island formed for some first kind breaker or the second class breaker has multiple recoveries networking breakers,
And these restore networking breaker and adhere to three or three aboves separately, then only retain the extensive of two voltage class of highest
Multiple-series net breaker；
S5-4) substation is reconfigured quickly in each recovery networking breaker ownership one, and main website issues the instruction for restoring networking breaker
It is to be forwarded by the way that substation is reconfigured quickly.
6. supply network Millisecond method for fast reconstruction after a kind of electric network fault according to claim 1, which is characterized in that
In step 3, need to meet simultaneously following whole criterions to determine outer net generation off-the-line failure and collapse:
S6-1) the frequency departure rated frequency for the bus that outer net interconnector is connected is more than first frequency deviation threshold；
S6-2) frequency for the bus that outer net interconnector is connected and backup power source region bus frequency departure are more than second frequency
Deviation threshold；
S6-3) backup power source region bus frequency is within the scope of first frequency；
S6-4) frequency change rate for the bus that outer net interconnector is connected is more than first frequency change rate threshold value；
S6-5) above-mentioned condition is satisfied, and the duration is greater than third period threshold value.
7. supply network Millisecond method for fast reconstruction after a kind of electric network fault according to claim 1, which is characterized in that
In step 2 when be reconfigured quickly main website monitor preset failure occur when, before preset failure causes breaker to cut-off, just to
Multiple substation transmission combined floodgate pre-actuation signals restored where networking breaker.
8. supply network Millisecond method for fast reconstruction after a kind of electric network fault according to claim 1, which is characterized in that
Monitor that off-the-line failure occurs for outer net and when having collapsed, and sends following signals when main website is reconfigured quickly in step 3:
S8-1) to outer net network interconnecting circuit, i.e. the second class breaker, trip signal is sent；
S8-2 it) is delayed after 5 milliseconds, it is same to send inspection to the substation where the corresponding multiple recovery networking breakers of the second class breaker
Phase switching signal.
9. supply network Millisecond method for fast reconstruction after a kind of electric network fault according to claim 1, which is characterized in that
Receiving the substation that is reconfigured quickly of combined floodgate pre-actuation signal in step 4, according to In situ Measurement information to recognize failure in real time clear
When removing or being removed, i.e., when first kind breaker is cut-off or is cut-off, the plant stand to where being originally reconfigured quickly substation
Interior recovery networking breaker sends synchronizing close signal, and failure and first kind breaker here is not limited to originally be reconfigured quickly
Plant stand where substation, further includes the failure and first kind breaker of other plant stands of a distant place.
10. supply network Millisecond method for fast reconstruction, feature exist after a kind of electric network fault according to claim 1
In the substation that is reconfigured quickly for receiving combined floodgate pre-actuation signal in step 4 is removed or just using following methods identification failure
It is being removed:
S10-1) if substation and first kind breaker is reconfigured quickly in same plant stand, it is straight by hardwire that substation is reconfigured quickly
Substation is reconfigured quickly at once to the first kind after receiving trip signal in the trip signal for receiving the first kind breaker
The corresponding recovery networking breaker of breaker sends synchronizing close signal；
S10-2) if substation and first kind breaker is reconfigured quickly in same plant stand, it is straight by hardwire that substation is reconfigured quickly
The tripping for receiving the relevant protective device of first kind breaker or stability control device sending exports signal；It trips out when receiving
After message number, substation the 4th period threshold value of delay is reconfigured quickly to the corresponding recovery networking breaker hair of the first kind breaker
Inspection asynchronous switch-on signal；
S10-3) if substation and first kind breaker is reconfigured quickly not in same plant stand, substation is reconfigured quickly and passes through monitoring station
The state for inside receiving the both end voltage of the breaker of combined floodgate pre-actuation signal, at the time of judging that failure is removed；When judging
When failure is removed, substation is reconfigured quickly and sends inspection same period conjunction to the corresponding recovery networking breaker of the first kind breaker at once
Lock signal.
11. supply network Millisecond method for fast reconstruction, feature after a kind of electric network fault according to claim 10
Be, S10-3) using following methods identification failure removed at the time of:
S11-1 substation real-time monitoring) is reconfigured quickly to receive in two side bus that the breaker of combined floodgate pre-actuation signal is connected
Busbar voltage U of the voltage compared with downsidey；
S11-2) work as UyWhen voltage is increased more than 0.1 times of voltage rating greater than 0.9 times of voltage rating or in 20ms, it is believed that therefore
Barrier is removed, and recording the moment is failure at the time of removed.
12. supply network Millisecond method for fast reconstruction, feature exist after a kind of electric network fault according to claim 1
In main website monitoring first kind breaker is reconfigured quickly in steps of 5 and cut-offs, and sends standby synchronizing close signal method such as
Under:
S12-1 it is disconnected from each first kind in the real-time reception network-wide basis of substation is reconfigured quickly by communication network that main website) is reconfigured quickly
Road device cut-offs the trip signal of signal or the associated protective device of first kind breaker or stability control device；
S12-2) be reconfigured quickly main website by each first kind breaker in plant stand where hardwire real-time reception cut-off signal or
The trip signal of the associated protective device of first kind breaker or stability control device；
S12-3) when main website being reconfigured quickly monitoring that a certain first kind breaker is cut-off, by communication network at once to this first
The corresponding multiple substations that are reconfigured quickly for restoring networking breaker of class breaker send synchronizing close signal, these restore networking
Breaker may belong to different substation or plant stand be reconfigured quickly；
S12-4) when be reconfigured quickly main website monitor protective device or stability control device to a certain first kind breaker send tripping letter
Number when, son is reconfigured quickly to the corresponding multiple networking breakers that restore of the first kind breaker by communication network in delay 5ms
It stands and sends synchronizing close signal, these, which restore networking breakers, may belong to different substation or plant stand be reconfigured quickly；
S12-5 synchronizing close signal) is had been sent from when substation is reconfigured quickly, and the inspection same period that substation transmission is reconfigured quickly closes
Lock signal has been performed, then the synchronizing close signal that main website is reconfigured quickly is ignored；Otherwise, the inspection that main website is reconfigured quickly is executed
Asynchronous switch-on signal；The synchronizing close signal that main website is reconfigured quickly is after the synchronizing close signal of substation is reconfigured quickly
Standby signal.
13. supply network Millisecond method for fast reconstruction, feature exist after a kind of electric network fault according to claim 1
In when finding that first kind breaker cut-offs generation in step 4 and step 5, at once to corresponding recovery networking breaker transmission
Synchronizing close signal, " at once " here receive first kind breaker relative to substation is reconfigured quickly or main website is reconfigured quickly
The delay for cut-offfing the generation moment should be no more than 5ms.
14. supply network Millisecond method for fast reconstruction, feature exist after a kind of electric network fault according to claim 1
In in step 6, the substation judgement recovery networking that is reconfigured quickly for receiving synchronizing close signaling protein14-3-3 networking breaker is broken
Whether road device meets asynchronous switch-on condition, without troubles inside the sample space locking and without backup power source failure locking simultaneously, if satisfied, then to extensive
Multiple-series net breaker, which sends to close a floodgate, executes signal.
15. supply network Millisecond method for fast reconstruction, feature after a kind of electric network fault according to claim 1 or described in 14
It is, the method for synchronism checking in step 6, the asynchronous switch-on condition for restoring networking breaker is to meet following require simultaneously:
S15-1) restore networking breaker two sides phase difference of voltage < 20 °；
S15-2) restore networking breaker two sides frequency difference and be less than 1Hz；
S15-3) restore networking less than 0.2 times voltage rating of breaker two sides voltage pair value difference.
16. supply network Millisecond method for fast reconstruction, feature after a kind of electric network fault according to claim 1 or described in 14
It is, the troubles inside the sample space locking in step 6 refers to following in the node voltage satisfaction of isolated island area side when restoring networking breaker
Either condition is then generated and is latched to the troubles inside the sample space of recovery networking breaker:
S16-1) there are phase voltages to be respectively less than 0.7 times of voltage rating；
S16-2) in three-phase voltage amplitude, maximum value and minimum differ by more than 30% voltage rating.
17. supply network Millisecond method for fast reconstruction, feature after a kind of electric network fault according to claim 1 or described in 14
It is, the backup power source failure locking in step 6 refers to when recovery networking breaker is in the node voltage and frequency of standby electricity source
Rate meets following either condition, then generates the backup power source failure locking to recovery networking breaker:
S17-1) phase voltage is except 0.85~1.2 times of nominal value range；
S17-2) frequency is outside 49.2Hz~50.8Hz range.
18. supply network Millisecond method for fast reconstruction, feature exist after a kind of electric network fault according to claim 1
In in step 7, using the recovery networking breaker or progress current limliting of following methods disconnection overcurrent: if restoring networking breaker
The electric current of breaker is more than to allow current threshold after combined floodgate, and continues the 5th period threshold value or more, then cut-off breaker or
It triggers this corresponding high-speed switch in substation is reconfigured quickly and enter high impedance status.
19. supply network Millisecond method for fast reconstruction, feature exist after a kind of electric network fault according to claim 1
In in step 8, unlocking high and low electromagnetic circle net using following methods:
19-1) after step 6 issues and closes a floodgate execution signal, if the first kind breaker and the second class breaker that should trip are still
For "on" position, and continue the 6th period threshold value, then issues trip command to these breakers；
19-2) after step 6 issues and closes a floodgate execution signal, if the recovery networking breaker of voltage levels is closing success shape
State, and continue the 6th period threshold value, then it issues and jumps to the recovery of the closing success of whole lower voltage grades networking breaker
Lock instruction；
It should be noted that it is above-mentioned selected cut-off breaker, if the following conditions are met, then without cut-offfing, these are not involved in out
The selection of disconnected breaker can be realized by being arranged offline or be realized by online topological analysis:
If 19-3) disconnection of low-voltage circuit breaker reduces the access amount of external power, do not trip the low-voltage circuit breaker；
If 19-4) outer net is single power supply, it is impossible to form the high and low electromagnetic circle net of power grid in outer net penetration power region.
20. supply network Millisecond method for fast reconstruction, feature exist after a kind of electric network fault according to claim 1
In after off-the-line occurs for power grid, recovery is split the grid-connected of isolated network in longest 150ms.
21. supply network Millisecond method for fast reconstruction, feature exist after a kind of electric network fault according to claim 4
In first voltage threshold value is set as 0.5 times of voltage rating, and first time period threshold value is set as 10ms.
22. supply network Millisecond method for fast reconstruction, feature exist after a kind of electric network fault according to claim 5
In the second time period threshold value is set as 20s.
23. supply network Millisecond method for fast reconstruction, feature exist after a kind of electric network fault according to claim 6
Be taken as 0.1Hz in: first frequency deviation threshold, second frequency deviation threshold is taken as 0.2Hz, first frequency range be taken as 49Hz~
51Hz, first frequency change threshold are taken as 0.2Hz/s, and third period threshold value is taken as 150ms.
24. supply network Millisecond method for fast reconstruction, feature exist after a kind of electric network fault according to claim 10
In the 4th period threshold value is taken as 5ms.
25. supply network Millisecond method for fast reconstruction, feature exist after a kind of electric network fault according to claim 18
In the 5th period threshold value therein is taken as 100ms.
26. supply network Millisecond method for fast reconstruction, feature exist after a kind of electric network fault according to claim 19
In the 6th period threshold value therein is taken as 150ms.
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