CN106159917A - The relay protection system of sequence accelerated motion indulged by power distribution network - Google Patents
The relay protection system of sequence accelerated motion indulged by power distribution network Download PDFInfo
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- CN106159917A CN106159917A CN201610681053.3A CN201610681053A CN106159917A CN 106159917 A CN106159917 A CN 106159917A CN 201610681053 A CN201610681053 A CN 201610681053A CN 106159917 A CN106159917 A CN 106159917A
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- 230000033001 locomotion Effects 0.000 title claims abstract description 52
- 230000001681 protective effect Effects 0.000 claims abstract description 41
- 230000009977 dual effect Effects 0.000 claims abstract description 6
- 230000011218 segmentation Effects 0.000 claims description 18
- 230000005540 biological transmission Effects 0.000 claims description 17
- 230000009191 jumping Effects 0.000 claims description 3
- 230000000875 corresponding effect Effects 0.000 description 5
- 230000005611 electricity Effects 0.000 description 4
- 238000010586 diagram Methods 0.000 description 3
- 230000002596 correlated effect Effects 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002159 abnormal effect Effects 0.000 description 1
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- 238000005516 engineering process Methods 0.000 description 1
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H7/00—Emergency protective circuit arrangements specially adapted for specific types of electric machines or apparatus or for sectionalised protection of cable or line systems, and effecting automatic switching in the event of an undesired change from normal working conditions
- H02H7/26—Sectionalised protection of cable or line systems, e.g. for disconnecting a section on which a short-circuit, earth fault, or arc discharge has occured
-
- 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
- H02H7/22—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 for distribution gear, e.g. bus-bar systems; for switching devices
- H02H7/226—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 for distribution gear, e.g. bus-bar systems; for switching devices for wires or cables, e.g. heating wires
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Abstract
The present invention relates to a kind of power distribution network and indulge the relay protection system of sequence accelerated motion; it includes the distribution website institute of dual power supply; all of first bus outlet wire protecting device and all of second bus outlet wire protecting device are all connected with section switch protection device, and section switch protection device is connected with segmented current transformer and block switch；The sectionalized busbar three-phase current on sectionalized busbar is obtained by segmented current transformer; if the sectionalized busbar that in sectionalized busbar three-phase current, at least a phase is preset in exceeding section switch protection device indulges sequence protective current setting valve; section switch protection device carries out timing, and is indulging sequence action long time limit t through segmentationZXLAfter, section switch protection device controls block switch and is in tripping state.Present configuration is compact, effectively shortens station, distribution website institute internal fault main protection movement time, solves power distribution network and the problem of major network relay protection setting time coordination difficulty.
Description
Technical field
The present invention relates to a kind of relay protection system, the relay protection system of sequence accelerated motion indulged by a kind of power distribution network
System, belongs to the technical field of relay protection of power system.
Background technology
For reliably there being selection excision fault, distribution website generally configures multiple stage protective relaying device.As it is shown in figure 1, be
The typical protection device of existing distribution website institute, specifically, the first bus 9 of being connected with the first inlet wire 1 including the first inlet wire 1,
Second inlet wire 2 and the second bus 10 being connected with described second inlet wire 2, the first bus 9 and the second bus 10 are female by segmentation
Line 11 connects.First inlet wire 1 is provided with the first inlet wire current transformer 3 and the first service entrance switch 4, described first inlet wire
Current transformer the 3, first service entrance switch 4 is connected with the first incoming relay-protection device 7；Second inlet wire 2 arranges the second inlet wire electricity
Current transformer 5 and the second service entrance switch 6, second inlet wire current transformer the 5, second service entrance switch 6 and second carries out protection dress
Put 8 connections.Segmented current transformer 13 and block switch 14 be set on sectionalized busbar 11, described segmented current transformer 13,
Block switch 14 is connected with section switch protection device 12.
First bus 9 connects some first bus outlets 15, the second bus 10 connects some second buses and goes out
Line 16, is respectively provided with the first bus outlet current transformer 19 and the first bus outlet switch in every first bus outlet 15
18, first bus outlet current transformer the 19, first bus outlet switch 18 be arranged in place the first bus outlet 15
First bus outlet wire protecting device 17 connects；Every second bus outlet 16 is respectively provided with the second bus outlet current transformer
22 and the second bus outlet switch 21, second bus outlet switch the 21, second bus outlet current transformer 22 be arranged in
The second bus outlet wire protecting device 20 in place the second bus outlet 16 connects.
During work, the first bus outlet wire protecting device 17 can control the switch shape of the first bus outlet switch 18 connected
State, and when the first bus outlet switch 18 is in tripping state, then first bus at the first bus outlet switch 18 place goes out
Line 15 is stopped power supply.In like manner, the second bus outlet wire protecting device 20 can control to be connected the switch of the second bus outlet switch 21
State, section switch protection device 12 can control the on off state of block switch 14.First incoming relay-protection device 7 can control first
The on off state of service entrance switch 4, the second incoming relay-protection device 8 can control the on off state of the second service entrance switch 6.
Usually, for guaranteeing the selectivity of relay protection action, first bus outlet wire protecting device the 17, second bus outlet
Should be by level between protection device 20, section switch protection device the 12, first incoming relay-protection device 7 and the second incoming relay-protection device 8
Difference configuration, the movement time of first bus outlet wire protecting device the 17, second bus outlet wire protecting device 17 is the shortest, and block switch is protected
The movement time of protection unit 12 takes second place, and first to carry out movement time of protection device the 7, second incoming relay-protection device 8 the longest.So
If outgoing line side breaks down, then so that the bus outlet switch of correspondence is in tripping state, prevent block switch 14, first
Service entrance switch 4 or the second service entrance switch 6 tripping cause the accident expansion.When the first inlet wire 1 or the second inlet wire 2 are stopped transport, pass through segmentation
Switch bus corresponding to 14 bands to run, then and when the bus-bar fault that correspondence is run, can first tripping block switch 14, prevent not
The service entrance switch tripping that stoppage in transit inlet wire is corresponding causes the accident expansion.
If carrying out protection seting according to above-mentioned requirements, it is assumed that outlet wire protecting device (the first bus outlet wire protecting device 17 with
And the second bus outlet wire protecting device 20) movement time adjust as tf, then the movement time of section switch protection device 12 is whole
It is set to tf+ Δ t, adjusts the movement time of incoming relay-protection device (first incoming relay-protection device 7 and the second incoming relay-protection device 8)
For tf+ 2 Δ t, wherein Δ t is differential, recommends to take 0.3 second for microcomputer based relay protective device code.Assume outlet protection dress
The movement time put is 0 second, and according to differential configuration, section switch protection device action in 12 at least 0.3 seconds, incoming relay-protection device is extremely
Few action in 0.6 second, after so causing distribution website institute internal unit fault, (i.e. incoming relay-protection device and segmentation is opened in main protection
Close protection device 12) movement time is long, has both been unfavorable for quickly excising fault, and too increasing adjusts with main electric grid relay protection joins
The difficulty closed, causes difficulty of adjusting.
Summary of the invention
It is an object of the invention to overcome the deficiencies in the prior art, it is provided that continuing of sequence accelerated motion indulged by a kind of power distribution network
Electric protection system, its compact conformation, effectively shorten station, distribution website institute internal fault main protection movement time, solve power distribution network and
The problem of major network relay protection setting time coordination difficulty.
The technical scheme provided according to the present invention, the relay protection system of sequence accelerated motion indulged by described power distribution network, including double
The distribution website institute of power supply, the first inlet wire and the second inlet wire included by the distribution website of described dual power supply；Described first inlet wire
Being connected with the first bus, the second inlet wire and the second bus connect, and the first bus is connected by sectionalized busbar and the second bus；First
Connect on bus and have some first bus outlets, the second bus connects some second bus outlets；Is arranged on first inlet wire
One inlet wire current transformer and the first service entrance switch, the second inlet wire arranges the second inlet wire current transformer and the second inlet wire
Switch；The first bus outlet current transformer, the first bus outlet switch and it is mounted in arbitrary first bus outlet
One bus outlet wire protecting device, arbitrary second bus outlet is mounted on the second bus outlet current transformer, the second bus
Outlet switch and the second bus outlet wire protecting device, sectionalized busbar is provided with segmented current transformer, block switch and divides
Section switching protective device；
All of first bus outlet wire protecting device and all of second bus outlet wire protecting device are all protected with block switch
Device connects, and section switch protection device is connected with segmented current transformer and block switch；
Obtain the sectionalized busbar three-phase current on sectionalized busbar, if by segmented current transformer in sectionalized busbar three-phase current extremely
A rare phase exceed section switch protection device in preset sectionalized busbar when indulging sequence protective current setting valve, block switch is protected
Device carries out timing, and is indulging sequence action long time limit t through segmentationZXLAfter, section switch protection device controls block switch and is in
Tripping state.
If the first bus outlet wire protecting device is or/and the second bus outlet wire protecting device transmits to section switch protection device
Outlet overcurrent protection signal, and obtain in sectionalized busbar three-phase current an at least phase by segmented current transformer and exceed segmentation
When sectionalized busbar preset in switching protective device indulges sequence protective current setting valve, section switch protection device carries out timing, and
Sequence action short duration t is being indulged through segmentationZXSAfter, section switch protection device controls block switch and is in tripping state.
In section switch protection device, it is provided with sectionalized busbar indulges sequence protection enable signal, indulge sequence protection at sectionalized busbar and make
Can be in effective enabled state by signal, the first bus outlet wire protecting device is or/and the second bus outlet wire protecting device is opened to segmentation
Close protection device transmission outlet overcurrent protection signal, and obtain in sectionalized busbar three-phase current the most not by segmented current transformer
Exceed the sectionalized busbar in section switch protection device when indulging sequence protective current setting valve, through alarm time delay tZXG1After, segmentation
Switching protective device output protection warning signal, and close sectionalized busbar indulge sequence protection enable signal effective enabled state；
After section switch protection device closedown sectionalized busbar indulges sequence protection enable signal, if the first bus outlet wire protecting device
Or/and the second bus outlet wire protecting device is after section switch protection device transmission outlet overcurrent protection signal, through involution time delay
tZXF1After, section switch protection device makes sectionalized busbar indulge sequence protection enable signal and reenters effective enabled state.
Described first inlet wire is provided with the first incoming relay-protection device, section switch protection device, block switch and all
The first bus outlet wire protecting device be all connected with the first incoming relay-protection device；First incoming relay-protection device is also electric with the first inlet wire
Current transformer and the first service entrance switch connect；
At least a first bus outlet wire protecting device transmits the first bus outlet overcurrent protection to the first incoming relay-protection device
Signal, and by the first inlet wire current transformer obtain in the first inlet wire three-phase current at least a phase more than the first incoming relay-protection
When the first inlet wire preset in device indulges sequence protective current setting valve, the first incoming relay-protection device carries out timing, and through entering
Sequence t movement time indulged by lineZXS1After, the first incoming relay-protection device controls the first service entrance switch and is in tripping state.
All refuse when block switch is in tripping state, the first bus-bar fault, and all of first bus outlet wire protecting device
Dynamic, then obtain in the first inlet wire three-phase current an at least phase by the first inlet wire current transformer and fill more than the first incoming relay-protection
Putting interior the first preset inlet wire when indulging sequence protective current setting valve, the first incoming relay-protection device carries out timing, and through inlet wire
Vertical sequence t movement timeZXL1After, the first incoming relay-protection device controls the first service entrance switch and is in tripping state.
When block switch is in closure state, the second bus-bar fault, block switch is to the first incoming relay-protection device transmission point
Section switch over-current protection signal, then obtain in the first inlet wire three-phase current an at least phase by the first inlet wire current transformer super
When the first inlet wire preset in crossing the first incoming relay-protection device indulges sequence protective current setting valve, the first incoming relay-protection device is counted
Time, and indulging sequence t movement time through inlet wireZXS2After, the first incoming relay-protection device controls the first service entrance switch and is in tripping shape
State.
When block switch is in closure state, when the second bus-bar fault, block switch tripping, then by the first inlet wire electricity
Current transformer obtain in the first inlet wire three-phase current at least a phase more than the first inlet wire preset in the first incoming relay-protection device
During vertical sequence protective current setting valve, the first incoming relay-protection device carries out timing, and is indulging sequence t movement time through inlet wireZXL2After,
First incoming relay-protection device controls the first service entrance switch and is in tripping state.
In the first incoming relay-protection device, it is provided with the first inlet wire indulges sequence protection enable signal, indulge sequence protection at the first inlet wire and make
Can be in effective enabled state by signal, the first bus outlet wire protecting device is to the first incoming relay-protection device transmission outlet overcurrent protection
Signal is or/and section switch protection device is to the first incoming relay-protection device transmission sectionalized busbar protection signal, and enters by first
Line current transformer obtains in the first inlet wire three-phase current and all indulges not less than the first inlet wire preset in the first incoming relay-protection device
During sequence protective current setting valve, the first incoming relay-protection device carries out timing, through alarm time delay tZXG2After, the first incoming relay-protection dress
Put output incoming relay-protection warning signal, and closedown the first inlet wire is indulged sequence protection and enabled effective enabled state of signal；
Close the first inlet wire at the first incoming relay-protection device to indulge sequence protection and enable after signal the first bus outlet wire protecting device to the
One incoming relay-protection device transmission outlet overcurrent protection signal is or/and section switch protection device transmits to the first incoming relay-protection device
After sectionalized busbar protection signal, through involution time delay tZXF2After, the first incoming relay-protection device makes the first inlet wire indulge sequence protection enable
Signal reenters effective enabled state.
Advantages of the present invention: all of first bus outlet wire protecting device, the second bus outlet wire protecting device are all and segmentation
Switching protective device connects, and the first bus outlet wire protecting device, section switch protection device and block switch are also with first
Incoming relay-protection device connects, and then effectively realizes the control of the on off state to block switch, the first service entrance switch, thus is not changing
In the case of realization has power distribution station institute structure, effectively shorten station, distribution website institute internal fault main protection movement time, solve to join
Electrical network and the problem of major network relay protection setting time coordination difficulty.
Accompanying drawing explanation
Fig. 1 be existing distribution website power supply and the schematic diagram of protection.
Fig. 2 is the schematic diagram of the present invention.
Fig. 3 is the another kind of schematic diagram of the present invention.
Description of reference numerals: 1-the first inlet wire, 2-the second inlet wire, 3-the first inlet wire current transformer, 4-the first inlet wire are opened
Pass, 5-the second inlet wire current transformer, 6-the second service entrance switch, 7-the first incoming relay-protection device, 8-the second incoming relay-protection device,
9-the first bus, 10-the second bus, 11-sectionalized busbar, 12-section switch protection device, 13-segmented current transformer, 14-
Block switch, 15-the first bus outlet, 16-the second bus outlet, 17-the first bus outlet wire protecting device, 18-the first bus
Outlet switch, 19-the first bus outlet current transformer, 20-the second bus outlet wire protecting device, 21-the second bus outlet are opened
V+ signal positive power source terminal, 24-sectionalized busbar in pass, 22-the second bus outlet current transformer, 23-section switch protection device
In protection, outlet protected stream to open into light emitting diode, 26-section switch protection device in connection end, the protection of 25-sectionalized busbar
Go out in V+ signal positive power source terminal, 28-the first incoming relay-protection device in interior V-signal negative power end, 27-the first incoming relay-protection device
Line protected stream to open the first outlet protection light emitting diode, 30-the first inlet wire in connection end, 29-the first incoming relay-protection device
Second outlet protection light emitting diode, 32-first in V-signal negative power end, 31-the first incoming relay-protection device in protection device
In incoming relay-protection device, sectionalized busbar protected stream to open block switch luminescence two in connection end, 33-the first incoming relay-protection device
In pole pipe and 34-the first incoming relay-protection device, block switch leaves into connection end.
Detailed description of the invention
Below in conjunction with concrete drawings and Examples, the invention will be further described.
As shown in Figure 2: in order to enable effectively to shorten station, distribution website institute internal fault main protection movement time, solve power distribution network
With the problem of major network relay protection setting time coordination difficulty, the present invention includes the distribution website institute of dual power supply, described dual power supply
Distribution website included by the first inlet wire 1 and the second inlet wire 2；Described first inlet wire 1 is connected with the first bus 9, the second inlet wire 2
Being connected with the second bus 10, the first bus 9 is connected with the second bus 10 by sectionalized busbar 11；Have if connecting on the first bus 9
Dry first bus outlet 15, the second bus 10 connects some second bus outlets 16；First inlet wire electricity is set on the first inlet wire 1
Current transformer 3 and the first service entrance switch 4, the second inlet wire 2 arranges the second inlet wire current transformer 5 and the second service entrance switch
6；Be mounted in arbitrary first bus outlet 15 first bus outlet current transformer the 19, first bus outlet switch 18 and
First bus outlet wire protecting device 17, arbitrary second bus outlet 16 is mounted on the second bus outlet current transformer 22,
Second bus outlet switch 21 and the second bus outlet wire protecting device 20, sectionalized busbar 11 is provided with segmented current transformer
13, block switch 14 and section switch protection device 12；
All of first bus outlet wire protecting device 17 and all of second bus outlet wire protecting device 20 are all and block switch
Protection device 12 connects, and section switch protection device 12 is connected with segmented current transformer 13 and block switch 14；
The sectionalized busbar three-phase current on sectionalized busbar 11 is obtained by segmented current transformer 13, if sectionalized busbar three-phase current
In sectionalized busbar that at least a phase is preset in exceeding section switch protection device 12 when indulging sequence protective current setting valve, segmentation is opened
Close protection device 12 and carry out timing, and indulge sequence action long time limit t through segmentationZXLAfter, section switch protection device 12 controls to divide
Duan Kaiguan 14 is in tripping state.
Specifically, it is connected with outside power supply source by first inlet wire the 1, second inlet wire 2, the first bus 9 and the first inlet wire 1
One end connect, the second bus 10 is connected with one end of the second inlet wire 2, can control the first inlet wire 1 by the first service entrance switch 4 right
The power supply state of the first bus 9, when the first inlet wire 4 is in closure state, can be made at the first bus 9 by the first inlet wire 1
In charging operation state, and when the first inlet wire 4 is in tripping state, being electrically connected between the first bus 9 and the first inlet wire 1 can be disconnected
Connecing, now the first bus 9 is likely to be at off-position.Second bus the 10, second inlet wire 2 and coordinating between the second service entrance switch 6
Relation is similar to, and here is omitted.It is connected, when sectionalized busbar 11 by sectionalized busbar 11 between the first bus 9 with the second bus 10
On block switch 14 when being in tripping state, then be in separate state between the first bus 9 and the second bus 10, i.e. first
The electriferous state of bus the 9, second bus 10 is separate；And the block switch 14 on sectionalized busbar 11 is when being in closure state,
Then the electriferous state between first bus the 9, second bus 10 is in synchronous regime, now, the electriferous state of the first bus 9 not only with
The on off state of the first inlet wire 1 and the first service entrance switch 4 is correlated with, also with the second inlet wire 2 and switch of the second service entrance switch 6
State is correlated with, and keeps identical electriferous state or keeps identical off-position, pass through between i.e. first bus the 9, second bus 10
First inlet wire 1 or the second inlet wire 10 can ensure the first bus 9 or charging operation state of the second bus 10 simultaneously.
When being embodied as, first service entrance switch the 4, second service entrance switch 6, block switch the 14, first bus outlet switch 18
And second bus outlet switch 21 all can with use relay form, by first service entrance switch the 4, second service entrance switch 6,
The on off state of block switch the 14, first bus outlet switch 18 and the second bus outlet switch 21 realizes different band electricity condition
Control process be that known to those skilled in the art, here is omitted.
In the embodiment of the present invention, all of first bus outlet wire protecting device 17 and all of second bus outlet are protected
Protection unit 20 is all connected with section switch protection device 12, arbitrary first bus outlet wire protecting device 17 and arbitrary second mother
Line outlet wire protecting device 20 all can transmit outlet overcurrent protection signal to section switch protection device 12；First bus outlet protection
Annexation between device the 17, second bus outlet wire protecting device 20 and section switch protection device 12 can be as it is shown in figure 1, institute
Have one end of the first bus outlet wire protecting device 17, one end of the second bus outlet wire protecting device 20 all fills with block switch protection
In putting the section switch protection device in 12, V+ signal positive power source terminal 23 connects, another of the first bus outlet wire protecting device 17
End, the other end of the second bus outlet wire protecting device 20 all protected stream to open into being connected end with outlet in section switch protection device
24 connect, and in section switch protection device, outlet protected stream to open connection end 24 and light-emitting diodes in section switch protection device
The anode tap of pipe 25 connects, the cathode terminal of light emitting diode 26 and V-in section switch protection device in section switch protection device
Signal negative power end 26 connects, when the first bus outlet wire protecting device 17 or the second bus outlet wire protecting device 20 are to block switch
When protection device 12 transmits outlet overcurrent protection signal, outlet can be obtained by light emitting diode in section switch protection device 25
Overcurrent protection signal, in the specific implementation, first bus outlet wire protecting device the 17, second bus outlet wire protecting device 20 and segmentation
Bus outlet wire protecting device 12 can also use other connection fit form, as long as disclosure satisfy that to block switch protection dress
In putting 12, transmission overcurrent protection signal, specifically will not enumerate.
In the embodiment of the present invention, when device fails in power distribution station institute, and when breaking down, the first bus outlet is protected
Protection unit the 17, second bus outlet wire protecting device 20 does not transmits outlet overcurrent protection signal to section switch protection device 12
Time, the sectionalized busbar three-phase current on sectionalized busbar 11 is obtained by segmented current transformer 13, if sectionalized busbar three-phase current
In sectionalized busbar that at least a phase is preset in exceeding section switch protection device 12 when indulging sequence protective current setting valve, segmentation is opened
Close protection device 12 and carry out timing, and indulge sequence action long time limit t through segmentationZXLAfter, section switch protection device 12 controls to divide
Duan Kaiguan 14 is in tripping state.When being embodied as, sequence action long time limit t is indulged in segmentationZXLStream movement time was protected according to outlet
The time margin of additional necessity is constituted, and considers the abnormal disabler caused simultaneously, it is proposed that takes out line and protects the longest action to adjust
The time delay of time additional 150ms, sectionalized busbar indulges sequence protective current setting valve, stream movement time was protected in outlet and outlet protection
The concrete value of the longest action setting time is relevant to site environment etc., specially known to those skilled in the art, the most not
Repeat again.
Further, if the first bus outlet wire protecting device 17 is or/and the second bus outlet wire protecting device 20 is opened to segmentation
Close protection device 12 and transmit outlet overcurrent protection signal, and obtained in sectionalized busbar three-phase current by segmented current transformer 13
When the sectionalized busbar that at least a phase is preset in exceeding section switch protection device 12 indulges sequence protective current setting valve, block switch
Protection device 12 carries out timing, and is indulging sequence action short duration t through segmentationZXSAfter, section switch protection device 12 controls segmentation
Switch 14 is in tripping state.
In the embodiment of the present invention, sequence action short duration t is indulged in segmentationZXSThe longest action setting time, outlet is protected according to outlet
The time margin of protection act Outlet time, chopper the longest movement time and necessity is constituted, it is proposed that take out line protection the longest
Additional 100 millisecond time-delay of action setting time；Outlet is protected the longest action setting time, outlet protection act Outlet time, is broken
Road device the longest movement time, corresponding concrete value was that known to those skilled in the art, here is omitted.
Further, in section switch protection device 12, it is provided with sectionalized busbar indulges sequence protection enable signal, female in segmentation
Line is indulged sequence protection enable signal and is in effective enabled state, and the first bus outlet wire protecting device 17 is or/and the second bus outlet is protected
Protection unit 20 transmits outlet overcurrent protection signal to section switch protection device 12, and by segmented current transformer 13 acquisition point
When section bus three-phase current all indulges sequence protective current setting valve not less than the sectionalized busbar in section switch protection device 12, warp
Cross alarm time delay tZXG1After, section switch protection device 12 output protection warning signal, and close sectionalized busbar indulge sequence protection make
Effective enabled state of energy signal；
Close sectionalized busbar at section switch protection device 12 to indulge sequence protection and enable after signal, if the first bus outlet wire protecting device
17 or/and the second bus outlet wire protecting device 20 is after section switch protection device 12 transmits outlet overcurrent protection signal, through multiple
Return time delay tZXF1After, section switch protection device 12 makes sectionalized busbar indulge sequence protection to enable signal and reenter and effectively enable shape
State.
In the embodiment of the present invention, in order to prevent the first bus outlet wire protecting device 17 or the second bus outlet wire protecting device 18
Misoperation, cause section switch protection device 12 that the mistake of block switch 14 is controlled, section switch protection device 12 is to first
The Real-time Logic of the outlet overcurrent protection signal of bus outlet wire protecting device 17 and the input of the second bus outlet wire protecting device 20
Detection.When being embodied as, when closing effective enabled state that sectionalized busbar indulges sequence protection enable signal, section switch protection device
12 cannot be according to first bus outlet wire protecting device the 17, second bus outlet wire protecting device 20 and by segmented current transformer
13 obtain the sectionalized busbar preset with in section switch protection device 12 in sectionalized busbar three-phase currents indulges sequence protective current and adjusts
The on off state of block switch 14 is controlled by the relation between value, and the most now the on off state of block switch 14 is not by above-mentioned situation
Control.Alarm time delay tZXG1, involution time delay tZXF1Concrete value can be chosen as required, generally can be true
It is set to 15 seconds.
As in figure 2 it is shown, described first inlet wire 1 is provided with the first incoming relay-protection device 7, section switch protection device 12, point
Duan Kaiguan 14 and all of first bus outlet wire protecting device 17 are all connected with the first incoming relay-protection device 7；First inlet wire is protected
Protection unit 7 is also connected with the first inlet wire current transformer 3 and the first service entrance switch 4；
At least first bus outlet wire protecting device 17 transmits the first bus outlet to the first incoming relay-protection device 7 and crosses stream and protect
Protect signal, and by the first inlet wire current transformer 3 obtain in the first inlet wire three-phase current at least a phase more than the first inlet wire
When the first inlet wire preset in protection device 7 indulges sequence protective current setting valve, the first incoming relay-protection device 7 carries out timing, and
Sequence t movement time is indulged through inlet wireZXS1After, the first incoming relay-protection device 7 controls the first service entrance switch 4 and is in tripping state.
In the embodiment of the present invention, by section switch protection device 12, block switch 14 and all of first bus outlet
Protection device 17 is connected with the first incoming relay-protection device 7, controls opening of the first service entrance switch 4 by the first incoming relay-protection device 7
Off status, it is thus possible to further ensure that power distribution station power supply safety.Section switch protection device 12, block switch 14 and institute
Connection matching relationship between the first bus outlet wire protecting device 17 having and the first incoming relay-protection device 7, particularly as follows:
One end, one end of section switch protection device 12 and the block switch 14 of all of first bus outlet wire protecting device 17
One end be connected with V+ signal positive power source terminal in the first incoming relay-protection device in the first incoming relay-protection device 7, all first female
In the other end of line outlet wire protecting device 17 and the first incoming relay-protection device, outlet was protected stream to open to connect into connection end 28, and first
In incoming relay-protection device, outlet protected stream to open the first outlet protection luminous two in connection end 28 and the first incoming relay-protection device
The anode tap of pole pipe 29 connects, and in the first incoming relay-protection device, the cathode terminal and first of the first outlet protection light emitting diode 29 enters
In line protection device, V-signal negative power end 30 connects, the other end of section switch protection device 12 and the first incoming relay-protection device
Interior block switch was protected stream to open to connect into connection end 32, and in the first incoming relay-protection device, block switch protected stream to open into connection
End 32 is connected with the anode tap of the second outlet protection light emitting diode 31 in the first incoming relay-protection device, the first incoming relay-protection device
In the cathode terminal of interior second outlet protection light emitting diode 31 and the first incoming relay-protection device, V-signal negative power end 30 connects；I.e.
Corresponding first bus outlet wire protecting device is realized by the first outlet protection light emitting diode 29 in the first incoming relay-protection device
17 transmit outlet overcurrent protection signal to the first incoming relay-protection device 7, are protected by the second outlet in the first incoming relay-protection device
Light emitting diode 31 realizes section switch protection device 12 and transmits sectionalized busbar overcurrent protection letter to the first incoming relay-protection device 7
Number.
In the other end of block switch 14 and the first incoming relay-protection device, block switch position is left and is connected into connection end 34, the
Block switch light-emitting diodes in connection end 34 and the first incoming relay-protection device are left in block switch position in one incoming relay-protection device
The anode tap of pipe 33 connects, the cathode terminal of block switch light emitting diode 33 and the first incoming relay-protection in the first incoming relay-protection device
In device, V-signal negative power end 30 connects, and can realize dividing by block switch light emitting diode 33 in the first incoming relay-protection device
Duan Kaiguan 14 transmits block switch overcurrent protection signal in the first incoming relay-protection device 7.
In the specific implementation, the first bus outlet wire protecting device 17, section switch protection device 12 and block switch 14
Being connected cooperation with between the first incoming relay-protection device 7 can be to use other form, as long as relevant signal input can be met
, here is omitted.
In the embodiment of the present invention, when the device fails connected on the first bus 9, then the first corresponding bus outlet is protected
Protection unit 17 can transmit outlet overcurrent protection signal to the first incoming relay-protection device 7, meanwhile, mutual by the first inlet wire current
Sensor 3 obtains in the first inlet wire three-phase current an at least phase and indulges more than the first inlet wire preset in the first incoming relay-protection device 7
During sequence protective current setting valve, the first incoming relay-protection device 7 carries out timing, and is indulging sequence t movement time through inlet wireZXS1After,
First incoming relay-protection device 7 controls the first service entrance switch 4 and is in tripping state.It is permissible that first inlet wire indulges sequence protective current setting valve
Being set as required, inlet wire indulges sequence t movement timeZXS1The longest action setting time, the first bus is protected to go out according to outlet
Line protection device 17 is performing the movement time of outlet overcurrent protection, chopper the longest movement time and the time margin of necessity
Constitute, it is proposed that take out line protection additional 100 millisecond time-delay of the longest action setting time.
Further, when block switch 14 is in tripping state, the first bus 9 fault, and all of first bus outlet
The equal tripping of protection device 17, then obtain in the first inlet wire three-phase current an at least phase by the first inlet wire current transformer 3 and surpass
When the first inlet wire preset in crossing the first incoming relay-protection device 7 indulges sequence protective current setting valve, the first incoming relay-protection device 7 is carried out
Timing, and indulging sequence t movement time through inlet wireZXL1After, the first incoming relay-protection device 7 controls the first service entrance switch 4 and is in jumping
Open state.
In the embodiment of the present invention, all of first bus outlet wire protecting device 17 tripping, refer to the first bus 9 fault, and
There is outlet when crossing stream, the first bus outlet protection switch 18 jumping of the first uncontrollable correspondence of bus outlet wire protecting device 17
Open, and outlet overcurrent protection signal can not be transmitted to section switch protection device 12 and the first incoming relay-protection device 7.Inlet wire is indulged
Sequence t movement timeZXL1Constitute according to the time margin of outlet additional necessity of overcurrent protection contact-actuation time, it is considered to open entry loop
May extremely cause disabler, it is proposed that take out line protection additional 150 millisecond time-delay of the longest action setting time.
When block switch 14 is in closure state, the second bus 10 fault, block switch 14 is to the first incoming relay-protection device 7
Transmission block switch overcurrent protection signal, then obtain in the first inlet wire three-phase current at least by the first inlet wire current transformer 3
When having a phase to indulge sequence protective current setting valve more than the first inlet wire preset in the first incoming relay-protection device 7, the first incoming relay-protection
Device 7 carries out timing, and is indulging sequence t movement time through inlet wireZXS2After, the first incoming relay-protection device 7 controls the first inlet wire and opens
Close 4 and be in tripping state.
In the embodiment of the present invention, when block switch 14 is in closure state, during the second bus 10 fault, then fault current stream
Crossing block switch 14, now, block switch 14 can transmit to section switch protection device 12 and the first incoming relay-protection device 7 and divide
Section switch over-current protection signal, meanwhile, obtains in the first inlet wire three-phase current at least by the first inlet wire current transformer 3
When having a phase to indulge sequence protective current setting valve more than the first inlet wire preset in the first incoming relay-protection device 7, the first incoming relay-protection
Device 7 carries out timing, and is indulging sequence t movement time through inlet wireZXS2After, the first incoming relay-protection device 7 controls the first inlet wire and opens
Close 4 and be in tripping state.When being embodied as, section switch protection device 12 receives the block switch mistake of block switch 14 transmission
During stream protection signal, described block switch 14 can be controlled and be in tripping state.Inlet wire indulges sequence t movement timeZXS2Open according to segmentation
Close and protect the longest action setting time, block switch protection act Outlet time (movement time of block switch), chopper
The time margin of long movement time and necessity is constituted, it is proposed that takes block switch and protects additional 100 millis of the longest action setting time
Second time delay.
When block switch 14 is in closure state, when the second bus 10 fault, block switch 14 tripping, then by first
It is preset more than in the first incoming relay-protection device 7 that inlet wire current transformer 3 obtains in the first inlet wire three-phase current an at least phase
When first inlet wire indulges sequence protective current setting valve, the first incoming relay-protection device 7 carries out timing, and is indulging sequence action through inlet wire
Between tZXL2After, the first incoming relay-protection device 7 controls the first service entrance switch 4 and is in tripping state.
In the embodiment of the present invention, block switch 14 tripping specifically refers to, when block switch 14 flows through fault current, and segmentation
The uncontrollable block switch of switching protective device 12 14 is in tripping state, and can not be to the first incoming relay-protection device 7 transmission point
Section switch over-current protection signal, obtains in the first inlet wire three-phase current at least one now by the first inlet wire current transformer 3
When indulging sequence protective current setting valve more than the first inlet wire preset in the first incoming relay-protection device 7 mutually, the first incoming relay-protection device 7
Carry out timing, and indulge sequence t movement time through inlet wireZXL2After, the first incoming relay-protection device 7 controls at the first service entrance switch 4
In tripping state.Inlet wire indulges sequence t movement timeZXL2The time margin of stream additional necessity of contact-actuation time is crossed according to block switch
Constitute, it is proposed that take block switch protection additional 150 millisecond time-delay of the longest action setting time.
In the first incoming relay-protection device 7, it is provided with the first inlet wire indulges sequence protection enable signal, indulge sequence protection at the first inlet wire
Enabling signal and be in effective enabled state, the first bus outlet wire protecting device 17 transmits outlet to the first incoming relay-protection device 7
Stream protection signal protects signal or/and section switch protection device 12 transmits sectionalized busbar to the first incoming relay-protection device 12, and
Obtain in the first inlet wire three-phase current all preset not less than in the first incoming relay-protection device 7 by the first inlet wire current transformer 3
The first inlet wire when indulging sequence protective current setting valve, the first incoming relay-protection device 7 carries out timing, through alarm time delay tZXG2After,
First incoming relay-protection device 7 exports incoming relay-protection warning signal, and closedown the first inlet wire is indulged sequence protection and enabled effectively making of signal
Can state；
The first incoming relay-protection device 7 close the first inlet wire indulge sequence protection enable after signal the first bus outlet wire protecting device 17 to
First incoming relay-protection device 7 transmits outlet overcurrent protection signal or/and section switch protection device 12 fills to the first incoming relay-protection
After putting 7 transmission sectionalized busbar protection signals, through involution time delay tZXF2After, the first incoming relay-protection device 7 makes the first inlet wire indulge sequence
Protection enables signal and reenters effective enabled state.
In the embodiment of the present invention, the use state enabling signal by the first inlet wire is indulged sequence protection controls, it is to avoid due to
When the first bus outlet wire protecting device 17, section switch protection device 12 and block switch 14 misoperation, cause the first inlet wire
The mistake of the first service entrance switch 4 is controlled by protection device 7, it is ensured that distribution website power supply reliability.
In the specific implementation, for the second incoming relay-protection device 8, all of second bus outlet wire protecting device 20 and point
Section switching protective device 12 is all connected with the second incoming relay-protection device 8 with block switch 14, and the second incoming relay-protection device 8 is to second
Service entrance switch 6 on off state controls process and is referred to above-mentioned explanation, and here is omitted.
All of first bus outlet wire protecting device the 17, the second bus outlet wire protecting device 20 of the present invention is all and block switch
Protection device 12 connects, and the first bus outlet wire protecting device 17, section switch protection device 12 and block switch 14 also with
First incoming relay-protection device 7 connects, and then effectively realizes the control of the on off state to block switch the 14, first service entrance switch 4, from
And in the case of not changing existing power distribution station institute structure, when effectively shortening the internal fault main protection action of station, distribution website institute
Between, solve power distribution network and the problem of major network relay protection setting time coordination difficulty.
Claims (8)
1. a relay protection system for sequence accelerated motion indulged by power distribution network, including the distribution website institute of dual power supply, described dual power supply
Distribution website included by the first inlet wire (1) and the second inlet wire (2)；Described first inlet wire (1) is connected with the first bus (9),
Second inlet wire (2) is connected with the second bus (10), and the first bus (9) is by sectionalized busbar (11) and block switch (14) and the
Two buses (10) connect；The upper connection of first bus (9) has some first bus outlets (15), and the upper connection of the second bus (10) is some
Second bus outlet (16)；First inlet wire current transformer (3) and the first service entrance switch (4) are set on the first inlet wire (1), the
Second inlet wire current transformer (5) and the second service entrance switch (6) are set on two inlet wires (2)；Arbitrary first bus outlet (15)
On be mounted on the first bus outlet current transformer (19), the first bus outlet switch (18) and the first bus outlet protection
Device (17), arbitrary second bus outlet (16) is mounted on the second bus outlet current transformer (22), the second bus goes out
Wiretap (21) and the second bus outlet wire protecting device (20), sectionalized busbar (11) be provided with segmented current transformer (13),
Block switch (14) and section switch protection device (12)；It is characterized in that:
All of first bus outlet wire protecting device (17) and all of second bus outlet wire protecting device (20) are all and segmentation
Switching protective device (12) connects, section switch protection device (12) and segmented current transformer (13) and block switch (14)
Connect；
The sectionalized busbar three-phase current on sectionalized busbar (11) is obtained by segmented current transformer (13), if sectionalized busbar three-phase
When in electric current, at least a phase exceedes section switch protection device (12), preset sectionalized busbar indulges sequence protective current setting valve,
Section switch protection device (12) carries out timing, and is indulging sequence action long time limit t through segmentationZXLAfter, section switch protection device
(12) control block switch (14) and be in tripping state.
The relay protection system of sequence accelerated motion indulged by power distribution network the most according to claim 1, it is characterized in that: if the first bus
Outlet wire protecting device (17) is or/and the second bus outlet wire protecting device (20) transmits outlet to section switch protection device (12)
Stream protection signal, and by segmented current transformer (13) acquisition sectionalized busbar three-phase current at least a phase exceed segmentation and open
When in pass protection device (12), preset sectionalized busbar indulges sequence protective current setting valve, section switch protection device (12) is counted
Time, and indulging sequence action short duration t through segmentationZXSAfter, section switch protection device (12) controls block switch (14) and is in jumping
Open state.
The relay protection system of sequence accelerated motion indulged by power distribution network the most according to claim 2, it is characterized in that: at block switch
It is provided with sectionalized busbar in protection device (12) and indulges sequence protection enable signal, indulge sequence protection enable signal at sectionalized busbar and be in effectively
Enabled state, the first bus outlet wire protecting device (17) is or/and the second bus outlet wire protecting device (20) is protected to block switch
Device (12) transmission outlet overcurrent protection signal, and obtain in sectionalized busbar three-phase current equal by segmented current transformer (13)
When indulging sequence protective current setting valve not less than the sectionalized busbar in section switch protection device (12), through alarm time delay tZXG1
After, section switch protection device (12) output protection warning signal, and close sectionalized busbar indulge sequence protection enable signal effective
Enabled state；
After section switch protection device (12) closedown sectionalized busbar indulges sequence protection enable signal, if the first bus outlet protection dress
Put (17) or/and the second bus outlet wire protecting device (20) transmits outlet overcurrent protection signal to section switch protection device (12)
After, through involution time delay tZXF1After, section switch protection device (12) make sectionalized busbar indulge sequence protection enable signal reenter
Effectively enabled state.
The relay protection system of sequence accelerated motion indulged by power distribution network the most according to claim 1, it is characterized in that: described first enters
Line (1) is provided with the first incoming relay-protection device (7), section switch protection device (12), block switch (14) and all of
One bus outlet wire protecting device (17) is all connected with the first incoming relay-protection device (7)；First incoming relay-protection device (7) is also with first
Inlet wire current transformer (3) and the first service entrance switch (4) connect；
At least a first bus outlet wire protecting device (17) transmits the first bus outlet to the first incoming relay-protection device (7)
Stream protection signal, and by the first inlet wire current transformer (3) obtain in the first inlet wire three-phase current at least a phase more than the
When in one incoming relay-protection device (7), the first preset inlet wire indulges sequence protective current setting valve, the first incoming relay-protection device (7) is carried out
Timing, and indulging sequence t movement time through inlet wireZXS1After, the first incoming relay-protection device (7) controls the first service entrance switch (4) place
In tripping state.
The relay protection system of sequence accelerated motion indulged by power distribution network the most according to claim 4, it is characterized in that: work as block switch
(14) it is in all trippings of tripping state, the first bus (9) fault, and all of first bus outlet wire protecting device (17), then leads to
Cross the first inlet wire current transformer (3) obtain in the first inlet wire three-phase current at least a phase more than the first incoming relay-protection device
(7), when the first inlet wire preset in indulges sequence protective current setting valve, the first incoming relay-protection device (7) carries out timing, and is passing through
Inlet wire indulges sequence t movement timeZXL1After, the first incoming relay-protection device (7) controls the first service entrance switch (4) and is in tripping state.
The relay protection system of sequence accelerated motion indulged by power distribution network the most according to claim 4, it is characterized in that: work as block switch
(14) being in closure state, the second bus (10) fault, block switch (14) leaves to the first incoming relay-protection device (7) transmission segmentation
Close overcurrent protection signal, then obtain in the first inlet wire three-phase current an at least phase by the first inlet wire current transformer (3) and surpass
Cross the first preset inlet wire in the first incoming relay-protection device (7) when indulging sequence protective current setting valve, the first incoming relay-protection device (7)
Carry out timing, and indulge sequence t movement time through inlet wireZXS2After, the first incoming relay-protection device (7) controls the first service entrance switch
(4) tripping state it is in.
The relay protection system of sequence accelerated motion indulged by power distribution network the most according to claim 4, it is characterized in that: work as block switch
(14) being in closure state, when the second bus (10) fault, block switch (14) tripping, then by the first inlet wire current mutual inductance
Device (3) obtain in the first inlet wire three-phase current at least a phase more than the first inlet wire preset in the first incoming relay-protection device (7)
During vertical sequence protective current setting valve, the first incoming relay-protection device (7) carries out timing, and is indulging sequence t movement time through inlet wireZXL2
After, the first incoming relay-protection device (7) controls the first service entrance switch (4) and is in tripping state.
The relay protection system of sequence accelerated motion indulged by power distribution network the most according to claim 4, it is characterized in that: at the first inlet wire
It is provided with the first inlet wire in protection device (7) and indulges sequence protection enable signal, indulge sequence protection enable signal at the first inlet wire and be in effectively
Enabled state, the first bus outlet wire protecting device (17) to first incoming relay-protection device (7) transmission outlet overcurrent protection signal or/
With section switch protection device (12) to the first incoming relay-protection device (12) transmission sectionalized busbar protection signal, and enter by first
Line current transformer (3) obtains in the first inlet wire three-phase current all not less than in the first incoming relay-protection device (7) preset first
When inlet wire indulges sequence protective current setting valve, the first incoming relay-protection device (7) carries out timing, through alarm time delay tZXG2After, first
Incoming relay-protection device (7) exports incoming relay-protection warning signal, and closedown the first inlet wire is indulged sequence protection and enabled effectively enabling of signal
State；
Close the first inlet wire at the first incoming relay-protection device (7) and indulge the first bus outlet wire protecting device after sequence protection enables signal
(17) to the first incoming relay-protection device (7) transmission outlet overcurrent protection signal or/and section switch protection device (12) is to first
After incoming relay-protection device (7) transmission sectionalized busbar protection signal, through involution time delay tZXF2After, the first incoming relay-protection device (7) makes
The first inlet wire indulge sequence protection enable signal reenter effective enabled state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610681053.3A CN106159917B (en) | 2016-08-16 | 2016-08-16 | Power distribution network indulges the relay protection system of sequence accelerated motion |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201610681053.3A CN106159917B (en) | 2016-08-16 | 2016-08-16 | Power distribution network indulges the relay protection system of sequence accelerated motion |
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| CN106159917A true CN106159917A (en) | 2016-11-23 |
| CN106159917B CN106159917B (en) | 2018-08-07 |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106887829A (en) * | 2017-03-28 | 2017-06-23 | 国网江西省电力公司电力科学研究院 | A kind of KV two class protection of single supply 10 is configured and fixed value adjusting method |
| CN106998061A (en) * | 2017-03-28 | 2017-08-01 | 国网江西省电力公司电力科学研究院 | A kind of KV of single supply 10 protection three-level configuration and fixed value adjusting method |
Family Cites Families (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2001339845A (en) * | 2000-05-25 | 2001-12-07 | Mitsubishi Electric Corp | Bus protection relay device |
| CN100359775C (en) * | 2005-06-28 | 2008-01-02 | 山东大学 | Step down transformer and relay protection method of middle low voltage side bus |
| CN201349128Y (en) * | 2008-12-26 | 2009-11-18 | 深圳市中电电力技术有限公司 | Section switch protection device |
| CN201789272U (en) * | 2010-04-30 | 2011-04-06 | 金华电业局 | Relay protection circuit preventing transformer differential protection malfunction |
| CN202111390U (en) * | 2011-06-01 | 2012-01-11 | 杭州城市能源有限公司 | PLC controlled triple power supply and distribution system |
| CN103746356A (en) * | 2012-12-21 | 2014-04-23 | 中铁电气化勘测设计研究院有限公司 | Digital communication current protection technology based on IEC 61850 protocol |
-
2016
- 2016-08-16 CN CN201610681053.3A patent/CN106159917B/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106887829A (en) * | 2017-03-28 | 2017-06-23 | 国网江西省电力公司电力科学研究院 | A kind of KV two class protection of single supply 10 is configured and fixed value adjusting method |
| CN106998061A (en) * | 2017-03-28 | 2017-08-01 | 国网江西省电力公司电力科学研究院 | A kind of KV of single supply 10 protection three-level configuration and fixed value adjusting method |
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| CN106159917B (en) | 2018-08-07 |
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