CN103606903B - Bus differential motion protection locking device and method for realizing bus differential motion protection locking by utilizing bus differential motion protection locking device - Google Patents
Bus differential motion protection locking device and method for realizing bus differential motion protection locking by utilizing bus differential motion protection locking device Download PDFInfo
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- CN103606903B CN103606903B CN201310576654.4A CN201310576654A CN103606903B CN 103606903 B CN103606903 B CN 103606903B CN 201310576654 A CN201310576654 A CN 201310576654A CN 103606903 B CN103606903 B CN 103606903B
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- 238000012545 processing Methods 0.000 claims description 52
- 230000000903 blocking effect Effects 0.000 claims description 36
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Abstract
The invention discloses a bus differential motion protection locking device and a method for realizing bus differential motion protection locking by utilizing the bus differential motion protection locking device. The bus differential motion protection locking device comprises a central unit and an interval unit which are connected. The interval unit comprises a central processor, an upper bus, a lower bus, an isolation upper knife switch, an isolation lower knife switch and a breaker. Loops formed among the central processor, the upper bus and the lower bus are respectively connected or disconnected by the central processor via the isolation upper knife switch, the isolation lower knife switch, the breaker and connection circuits among the isolation upper knife switch, the isolation lower knife switch and the breaker. The central unit comprises an information processing unit, a state judgment unit and an instruction unit. The output end of the interval unit is connected with the information processing unit. The instruction unit is connected with the input end of the interval unit. According to the bus differential motion protection locking device, the bus is confirmed via simulation display, and the operation state of the bus is monitored and the bus is protected so that a fault point is correctly reflected by the bus and the fault point is removed through motion when a fault occurs.
Description
Technical field
The present invention relates to blocking device, more particularly to bus differential protecting blocking device.
The invention still further relates to blocking method, realize bus differential particularly to using above-mentioned bus differential protecting blocking device
The method of protection blocking.
Background technology
In existing power system operation mode, because equipment wiring is complicated, equipment performance is uneven, field operator
The reasons such as operation, middle generation equipment actual motion state and protection device judge not being inconsistent after operation often to cause bus protection
Close, and the bus differential protection mistake that extremely leads to of equipment state original paper Current calculation is arrived incorrect protection section, by mistake alarm
By mistake the problems such as latch-up protection device.
Content of the invention
The present invention completes to solve above-mentioned of the prior art not enough, it is an object of the invention to provide a kind of logical
Cross each topology such as isolation switch, chopper, central processing unit, connection line and mutually form basic topological structure, and by topology
Scheme the analog information such as contact between it, operation condition, sequencing and mutual alignment, determine bus, and start supervision bus
Running status, so that when faulty, bus correctly reflects that the bus differential protecting locking of trouble point is excised in simultaneously action to protection bus
Device.
The bus differential protecting blocking device of the present invention, including the central location connecting and at least one spacer units, institute
State spacer units and include central processing unit, Up Highway UHW, Down Highway, disconnecting link, the lower disconnecting link of isolation and chopper in isolation, described central authorities
Processor passes through the upper disconnecting link of isolation, the lower disconnecting link of isolation, chopper and the connection line between them respectively by described centre
The loop being formed between reason device and described Up Highway UHW and described Down Highway is switched on or switched off, and described central location includes information processing
Unit, condition adjudgement unit and command unit, the outfan of described spacer units is connected with described information processing unit, described
Command unit is connected with the input of described spacer units.
The bus differential protecting blocking device of the present invention can also be：
In isolation, disconnecting link one end is connected with Up Highway UHW, and the described other end make and break contact isolating upper disconnecting link passes through first respectively
Optic coupling element and the second optic coupling element are connected with central processing unit, and the lower disconnecting link one end of described isolation is connected with Down Highway, described every
Pass through the 3rd optic coupling element respectively from the other end make and break contact of lower disconnecting link and the 4th optic coupling element is connected with central processing unit, institute
The make and break contact stating chopper is connected with central processing unit by the 5th optic coupling element and the 6th optic coupling element respectively.
Described chopper is connected with a current transformer, the information processing list of described current transformer and described spacer units
Unit connects, and described information processing unit includes A/D converter.
Described A/D converter includes microprocessor, main memory, internally stored program bin and house dog.
The upper disconnecting link of described isolation, the lower disconnecting link of isolation and chopper all comprise a passive normal opened contact and one passive
Normally closed contact.
It is provided with actuation of an alarm unit in described spacer units.
The bus differential protecting blocking device of the present invention, it includes central location and at least one spacer units connecting,
Described spacer units include central processing unit, Up Highway UHW, Down Highway, disconnecting link, the lower disconnecting link of isolation and chopper in isolation, described in
Central processor passes through the upper disconnecting link of isolation, the lower disconnecting link of isolation, chopper and the connection line between them respectively by described central authorities
The loop being formed between processor and described Up Highway UHW and described Down Highway is switched on or switched off, and described central location is included at information
Reason unit, condition adjudgement unit and command unit, the outfan of described spacer units is connected with described information processing unit, institute
The input stating command unit with described spacer units is connected.Such bus differential protecting blocking device is with respect to existing skill
The advantage of art is：Basic topological frame is mutually formed by each topology such as isolation switch, chopper, central processing unit, connection line
Structure, and by analog information such as contact between it for the topological diagram, operation condition, sequencing and mutual alignments, determine bus, and
Start the bus run state that monitors, so that when faulty, bus is correct to be reflected and action excision trouble point protection bus.
It is a further object of the present invention to provide a kind of can be processed by isolation switch, chopper, central authorities using above-mentioned
Each topology such as device, connection line mutually forms basic topological structure, and by contact between it for the topological diagram, operation condition, elder generation
The analog information such as order and mutual alignment, determines bus, and starts the protection computational methods under corresponding statess afterwards, monitors bus fortune
Row state, the effect of protection bus and each element, so that when faulty, the difference of the correct reflection of bus action excision trouble point
The method that dynamic protection blocking device realizes bus differential protecting locking.
The method that bus differential protecting locking realized by the utilization bus differential protecting blocking device of the present invention, walks including following
Suddenly：
A. determine bus section, busbar section；By be defeated by the Up Highway UHW of spacer units, Down Highway, disconnecting link in isolation, the lower disconnecting link of isolation with
And the mode of breaker signal is so that central processing unit is determining at disconnecting link in above-mentioned isolation, the lower disconnecting link of isolation and chopper
Yu Hewei still divides position；
B. judge system mode：Judge the state of each bus of system according to topological Terms and topological diagram, to all of bus section, busbar section
Decision state is gone forward side by side and is about to data message and is sent to central location；
C. central location is processed：The information process unit receiving data information of central location is simultaneously processed to this information,
Determine Up Highway UHW and Down Highway image mode, the state of condition adjudgement unit judges each topology phase, divide protection section, lead to simultaneously
Cross topological phase state determines to send whether count corresponding mother by closing integral bus bar differential protection blocking device or by electric current
The signal of line segment；
D. spacer units response：Spacer units receive the command signal that sends of command unit and execute this signal：Or close
Or count respective bus bars section.
The method that bus differential protecting locking realized by the utilization bus differential protecting blocking device of the present invention, due to employing
Above-mentioned steps, mutually form basic topological structure by each topology such as isolation switch, chopper, central processing unit, connection line,
And by analog information such as contact between it for the topological diagram, operation condition, sequencing and mutual alignments, determine bus, and open
Protection computational methods under dynamic corresponding statess, monitor bus run state, the effect of protection bus and each element, so that faulty
When, the correct reflection of bus simultaneously action excision trouble point, realize bus differential protecting locking.
Brief description
Fig. 1 bus differential protecting of the present invention blocking device embodiment schematic diagram.
The overall connection diagram of Fig. 2 bus differential protecting of the present invention blocking device embodiment.
Figure number explanation
1 ... spacer units 2 ... central location 3 ... Up Highway UHW
4 ... Down Highway 5 ... central processing unit 6 ... choppers
Lower disconnecting link 9 ... first optic coupling element of disconnecting link 8 ... isolation in 7 ... isolation
10 ... second optic coupling element 11 ... the 3rd optic coupling element 12 ... the 4th optic coupling elements
13 ... the 5th optic coupling element 14 ... the 6th optic coupling element 15 ... current transformer
17 ... A/D converters
Specific embodiment
Fig. 1 to Fig. 2 below in conjunction with the accompanying drawings realizes bus to the bus differential protecting blocking device of the present invention and using it
The method of differential protection locking is described in further detail.
The bus differential protecting blocking device of the present invention, refer to Fig. 1 to Fig. 2, including the central location 2 connecting with least
One spacer units 1, described spacer units 1 include central processing unit 5, Up Highway UHW 3, Down Highway 4, disconnecting link 7 in isolation, under isolation
Disconnecting link 8 and chopper 6, described central processing unit 5 pass through the upper disconnecting link 7 of isolation, the lower disconnecting link 8 of isolation, chopper 6 and they between
Connection line respectively by between described central processing unit 5 and described Up Highway UHW 3 and described Down Highway 4 formed loop connect or
Disconnect, described central location 2 includes information process unit, condition adjudgement unit and command unit, described spacer units defeated
Go out end to be connected with described information processing unit, described command unit is connected with the input of described spacer units 1.Such mother
Line differential protection blocking device with respect to the advantage of prior art is：By isolation switch, chopper 6, central processing unit 5, connect
Each topology such as link mutually forms basic topological structure, and by contact between it for the topological diagram, operation condition, sequencing
With analog information such as mutual alignments, determine bus and monitor bus run state, protect bus, so that when faulty, bus is just
Really reflection action excision trouble point.So, when, in system operation, disconnecting link 8 and open circuit are descended in disconnecting link 7, isolation in isolation
Device 6 different break-make modes by the connection line between them from central processing unit 5, determine and judge Up Highway UHW 3 and lower mother
The method of operation of line 4 and running status, and the line current of counting period unit 1 and spill current, send instruction, realize bus poor
Dynamic protection blocking.
The bus differential protecting blocking device of the present invention, refer to Fig. 1 to Fig. 2, has on the basis of previous technique scheme
Body can be that upper disconnecting link 7 one end of isolation is connected with Up Highway UHW 3, and the described other end make and break contact isolating upper disconnecting link 7 passes through respectively
First optic coupling element 9 and the second optic coupling element 10 are connected with central processing unit 5, and lower disconnecting link 8 one end of described isolation is with Down Highway 4 even
Connect, the other end make and break contact of the lower disconnecting link 8 of described isolation pass through respectively the 3rd optic coupling element 11 and the 4th optic coupling element 12 with
Central processor 5 connects, the make and break contact of described chopper 6 pass through respectively the 5th optic coupling element 13 and the 6th optic coupling element 14 with
Central processing unit 5 connects.
Concrete analysis is as follows：
Central processing unit 5, Up Highway UHW 3, Down Highway 4, disconnecting link 7, the lower disconnecting link 8 of isolation, chopper 6 and its connecting line in isolation
The topological phase of road composition.
1. state 1（Stoppage in transit state）
In a point position, in isolation, disconnecting link 7 and the lower disconnecting link 8 of isolation are cutting position to chopper 6, and this line is stopped transport, and does not calculate line current.
Idiographic flow：
（1）Disconnecting link 7 " point " in isolation, in isolation, disconnecting link 7 is Q1（ON disconnects, and OFF closes through the first optic coupling element 9
With the second optic coupling element 10, entering central processing unit 5 is CPU, and on CPU detection and isolation, disconnecting link 7Q1 is in " dividing " position.
（2）The lower disconnecting link 8 " point " of isolation, the lower disconnecting link 8 of isolation is Q2（ON disconnects, and OFF closes）Through the 3rd optic coupling element
11 and the 4th optic coupling element 12, enter central processing unit 5CPU, under CPU detection and isolation, disconnecting link 8Q2 is in " dividing " position.
（3）Chopper 6 " point ", chopper 6 is Q0（ON disconnects, and OFF closes）Through the 5th optic coupling element 13 and the 6th
Optic coupling element 14, enters central processing unit 5, and central processing unit 5 judges chopper 6Q0 in " dividing " position.
Protection blocking device according to the state of these topological Terms, judges that circuit is out of service, so when do not calculate this circuit
Electric current.
2. state 2（Pre- input Down Highway 4 state）
Chopper 6Q0 is closing position, is putting into Down Highway 4 in a point position, Q2 (the lower disconnecting link 8 of isolation), will after Q0 (chopper 6) closes
Line current tester flows back to road to lower female difference.
Idiographic flow：
（1）Q1 (disconnecting link 7 in isolation) " dividing ", Q1（ON disconnects, and OFF closes）Through the first optic coupling element 9 and
Two optic coupling elements 10, enter central processing unit 5CPU, and CPU judges Q1 in " dividing " position.
（2）Q2 (the lower disconnecting link 8 of isolation) " conjunction ", Q2（ON closes, and OFF disconnects）Through the 3rd optic coupling element 11 He
4th optic coupling element 12, enters central processing unit 5CPU, and CPU judges Q2 in " conjunction " position.
（3）Q0 (chopper 6) is temporary transient " dividing ", chopper 6Q0（ON disconnects, and OFF closes）Through the 5th optic coupling element 13
With the 6th optic coupling element 14, enter central processing unit 5CPU, CPU judges Q0 in " dividing " position.
Protection device according to the state of these topological Terms, judges circuit in Down Highway 4, after Q0 " conjunction ", then by line electricity
Flowmeter flows back to road to lower female difference.
3. state 3（Pre- input Up Highway UHW 3 state）
Q0（Chopper 6）In a point position, Q1 (disconnecting link 7 in isolation) is closing position, is putting into Up Highway UHW 3, after Q0 (chopper 6) closes
Supreme for line current tester female difference is flowed back to road.
Idiographic flow：
（1）Q1 (disconnecting link 7 in isolation) " conjunction ", disconnecting link 7Q1 in isolation（ON closes, and OFF disconnects）Through the first optocoupler unit
Part 9 and the second optic coupling element 10, enter central processing unit 5CPU, and CPU judges Q1 in " conjunction " position.
（2）Q2 (the lower disconnecting link 8 of isolation) " dividing ", the lower disconnecting link 8Q2 of isolation（ON disconnects, and OFF closes）Through the 3rd optocoupler unit
Part 11 and the 4th optic coupling element 12, enter central processing unit 5CPU, and CPU judges Q2 in " dividing " position.
（3）Q0 (chopper 6) is temporary transient " dividing ", chopper 6Q0（ON disconnects, and OFF closes）Through the 5th optic coupling element 13
With the 6th optic coupling element 14, enter central processing unit 5CPU, CPU judges Q0 in " dividing " position.
Protection device according to the state of these topological Terms, judges that circuit operates in Up Highway UHW 3, after Q0 " conjunction ", then by line
Galvanometer supreme female difference in road flows back to road.
4. state 4（Operate in Up Highway UHW 3 state）
Chopper 6Q0 is closing position, and Q1 (disconnecting link 7 in isolation), in " conjunction " position, Q2 (the lower disconnecting link 8 of isolation) " dividing ", operates in
Bus 3, Q0 (chopper 6), in " conjunction " position, supreme for line current tester female difference is flowed back to road.
Idiographic flow：
（1）Q1 (disconnecting link 7 in isolation) " conjunction ", disconnecting link 7Q1 in isolation（ON closes, and OFF disconnects）Through the first optocoupler unit
Part 9 and the second optic coupling element 10, enter central processing unit 5CPU, and CPU judges Q1 in " conjunction " position.
（2）Q2 (the lower disconnecting link 8 of isolation) " dividing ", the lower disconnecting link 8Q2 of isolation（ON disconnects, and OFF closes）Through the 3rd optocoupler unit
Part 11 and the 4th optic coupling element 12, enter central processing unit 5CPU, and CPU judges Q2 in " dividing " position.
（3）Q0 (chopper 6) " conjunction ", chopper 6Q0（ON closes, and OFF disconnects）Through the 5th optic coupling element 13 and
Six optic coupling elements 14, enter central processing unit 5CPU, and CPU judges Q0 in " conjunction " position.
Protection device, according to the state of these topological Terms, judges that circuit operates in Up Highway UHW 3, by supreme for line current tester mother
Difference flows back to road.
5. state 5（Operate in Down Highway 4 state）
Chopper 6Q0 is closing position, and Q1 (disconnecting link 7 in isolation), in " dividing " position, Q2 (the lower disconnecting link 8 of isolation) " conjunction ", operates in down
Bus 4, Q0 (chopper 6), in " conjunction " position, line current tester is flowed back to road to lower female difference.
Idiographic flow：
（1）Q1 (disconnecting link 7 in isolation) " dividing ", Q1（ON disconnects, and OFF closes）Through through the first optic coupling element 9 He
Second optic coupling element 10, enters central processing unit 5CPU, and CPU judges Q1 in " dividing " position.
（2）Q2 (the lower disconnecting link 8 of isolation) " conjunction ", Q2（ON disconnects, and OFF closes）Through the 3rd optic coupling element 11 and
Four optic coupling elements 12, enter central processing unit 5CPU, and CPU judges Q2 in " conjunction " position.
（3）Q0 (chopper 6) " conjunction ", Q0（ON closes, and OFF disconnects）Through the 5th optic coupling element 13 and the 6th light
Coupling element 14, enters central processing unit 5CPU, and CPU judges Q0 in " conjunction " position.
Protection device, according to the state of these topological Terms, judges that circuit operates in Down Highway 4, by line current tester to lower mother
Difference flows back to road.
6. state 6（Upper disconnecting link abnormality）
Chopper 6Q0 is closing position, and Q1 (disconnecting link 7 in isolation) position does not know, and Q2 (the lower disconnecting link 8 of isolation) " conjunction ", not by line
Galvanometer supreme female difference in road flows back to road.Send alarm！
Idiographic flow：
（1）Q1 (disconnecting link 7 in isolation) position does not know, disconnecting link 7Q1 in isolation（ON disconnects, and OFF disconnects）Through first
Optic coupling element 9 and the second optic coupling element 10, enter central processing unit 5CPU, and CPU judges that Q1 does not know in position, improper shape
State.
（2）Q2 (the lower disconnecting link 8 of isolation) " conjunction ", the lower disconnecting link 8Q2 of isolation（ON closes, and OFF disconnects）Through the 3rd optocoupler unit
Part 11 and the 4th optic coupling element 12, enter central processing unit 5CPU, and CPU judges Q2 in " conjunction " position.
（3）Q0 (chopper 6) " conjunction ", chopper 6Q0（ON closes, and OFF disconnects）Through the 5th optic coupling element 13 and
Six optic coupling elements 14, enter central processing unit 5CPU, and CPU judges Q0 in " conjunction " position.
Protection device, according to the state of these topological Terms, judges circuit disconnecting link abnormal state, that line current tester is not supreme
Female difference flows back to road.It is simultaneously emitted by alerting！
7. state 7（Lower disconnecting link abnormality）
Chopper 6Q0 does not know, not by line in conjunction position, Q1 (disconnecting link 7 in isolation) " conjunction ", Q2 (the lower disconnecting link 8 of isolation) position
Road galvanometer flows back to road to lower female difference.It is simultaneously emitted by alerting！
Idiographic flow：
（1）Q1 (disconnecting link 7 in isolation) " conjunction ", disconnecting link 7Q1 in isolation（ON closes, and OFF disconnects）Through the first optic coupling element 9
With the second optic coupling element 10, enter central processing unit 5CPU, CPU judges Q1 in " conjunction " position.
（2）Q2 (the lower disconnecting link 8 of isolation) position does not know, the lower disconnecting link 8Q2 of isolation（ON disconnects, and OFF disconnects）Through the 3rd
Optic coupling element 11 and the 4th optic coupling element 12, enter central processing unit 5CPU, and CPU judges that Q2 position does not know.
（3）Q0 (chopper 6) " conjunction ", chopper 6Q0（ON closes, and OFF disconnects）Through the 5th optic coupling element 13 and
Six optic coupling elements 14, enter central processing unit 5CPU, and CPU judges Q0 in " conjunction " position.
Protection device according to the state of these topological Terms, judges circuit disconnecting link abnormal state, not by line current tester under
Female difference flows back to road.It is simultaneously emitted by alerting！
8. state 8（Chopper 6 abnormality）
Chopper 6Q0 position does not know, and Q1 (disconnecting link 7 in isolation) " conjunction ", Q2 (the lower disconnecting link 8 of isolation) " dividing ", not by circuit
Galvanometer flows back to road to female difference.It is simultaneously emitted by alerting！
Idiographic flow：
（1）Q1 (disconnecting link 7 in isolation) " conjunction ", disconnecting link 7Q1 in isolation（ON closes, and OFF disconnects）Through the first optocoupler
Element 9 and the second optic coupling element 10, enter central processing unit 5CPU, and CPU judges Q1 in " conjunction " position.
（2）Q2 (the lower disconnecting link 8 of isolation) " dividing ", the lower disconnecting link 8Q2 of isolation（ON disconnects, and OFF closes）Through the 3rd light
Coupling element 11 and the 4th optic coupling element 12, enter central processing unit 5CPU, and CPU judges Q2 in " dividing " position.
（3）Q0 (chopper 6) position does not know, chopper 6Q0（ON disconnects, and OFF disconnects）Through the 5th optocoupler
Element 13 and the 6th optic coupling element 14, enter central processing unit 5CPU, and CPU judges Q0 in " conjunction " position.
Protection device, according to the state of these topological Terms, judges line-breaker 6 abnormal state, not by line current tester extremely
Female difference flows back to road.It is simultaneously emitted by alerting！
The bus differential protecting blocking device of the present invention, refer to Fig. 1 to Fig. 2, in the base of foregoing technical scheme
On plinth, can also be that described chopper 6 is connected with a current transformer 15, described current transformer and described spacer units 1
Information process unit connects, and described information processing unit includes A/D converter 17.Described current transformer 15 is used for line
The high-voltage great-current of road last time side, is converted into secondary small current and uses for bus differential protecting blocking device.And analog/digital conversion
Unit 17, this be will input analog quantity, filtered after be converted to digital signal supply bus differential protecting blocking device use.Logical
Cross and A/D conversion is carried out to input quantity, by programmable microprocessor, the digital signal of generation can be for further processing.Advantage：
1. pass through digitized processing, feeder current is carried out weekly with the sampling of 48 times.Even if during larger through fault current, measurement is still
Can keep stable.2. pair current sampling signal carries out Fourier transform, makes the process subsequently carrying out only be aimed at fundametal compoment.
Do not need current transformer to meet any special requirement, or even when there is CT saturation, protection remains to correct area
Divide internal fault and external fault.Further preferred technical scheme is：Described A/D converter 17 include microprocessor,
Main memory, internally stored program bin and house dog.Different tests are carried out to important hardware device, house dog continuously supervises
The correctness of viewing system function, continuously monitors the correctness of data exchange also by process bus.Each output channel bag
Containing two redundancy commands, it is opened at regular intervals by house dog, if being unsatisfactory for house dog condition, locking should
Passage.Furthermore it is also possible to be that the upper disconnecting link 7 of described isolation, the lower disconnecting link 8 of isolation and chopper 6 all comprise one and passive normally opened connect
Point and a passive normally closed contact.So, disconnecting link 7, lower disconnecting link 8 position of isolation or bus 6 " combined floodgate " in isolation
When, normal opened contact（N/O）Signal；When in isolation, disconnecting link 7, lower disconnecting link 8 position of isolation or bus 6 are by " separating brake ", often
Close contact（N/C）Signal.
When the upper disconnecting link 7 of isolation of closing, the lower disconnecting link 8 of isolation or bus 6, normal opened contact need to be between main contact contact
A period of time interior (about 0.15s) before gap is decreased to turn on puncture place is in closure.
One algorithm is used for monitoring the steady statue of isolation switch signal voltage, check each isolation switch only present its two
One of individual position state, that is, or from closing junction checks voltage, or checks voltage from tapping point.If simultaneously
Two signals occur or two signals disappear simultaneously, then send warning signal.
When opening an isolation above disconnecting link 7, the lower disconnecting link 8 of isolation or bus 6, normal opened contact must connect in main contact
Gap between point is developed in a period of time exceeding before the conducting puncture place that electric arc can not be lighted still in this period
Inside remain closed（It is not at open position）.If can not so, that is, before setting up the withstanding voltage between main contact contact,
Normal opened contact signal " is not maintained as closing position ", then never will adopt normally closed contact signal, it reaches tolerance in main contact contact
Before voltage, always for " open position ".It can in addition contain be to be provided with actuation of an alarm unit in described spacer units 1.Work as report
After alert instruction sends, spacer units 1 receive this instruction, actuation of an alarm unit action, send alarm signal.
The method that bus differential protecting locking realized by the utilization aforesaid bus differential protecting blocking device of the present invention, please join
Examine Fig. 1 to Fig. 2, comprise the following steps：
A. determine bus section, busbar section；By being defeated by the Up Highway UHW 3 of spacer units 1, Down Highway 4, disconnecting link 7, the lower knife of isolation in isolation
The mode of lock 8 and chopper 6 signal so that central processing unit 5 come to determine the lower disconnecting link 8 of disconnecting link 7 in above-mentioned isolation, isolation and
Chopper 6 is in conjunction position still point position；
B. judge system mode：Judge the state of each bus of system according to topological Terms and topological diagram, to all of bus section, busbar section
Decision state is gone forward side by side and is about to data message and is sent to central location 2；
C. central location 2 is processed：The information process unit receiving data information of central location 2 and to this information at
Reason, determines Up Highway UHW 3 and Down Highway 4 image mode, the state of condition adjudgement unit judges each topology phase, divides protection section,
Pass through topological phase state simultaneously and determine to send whether count by closing integral bus bar differential protection blocking device or by electric current
The signal of respective bus bars section；
D. spacer units 1 respond：Spacer units 1 receive the command signal that sends of command unit and execute this signal：Or close
Close or count respective bus bars section.
Due to employing above-mentioned steps, by each topologys such as isolation switch, chopper 6, central processing unit 5, connection lines
Mutually form basic topological structure, and by moulds such as contact between it for the topological diagram, operation condition, sequencing and mutual alignments
Intend display, determine bus, and start the protection computational methods under corresponding statess, monitor bus run state, protection bus and each
The effect of element, so that when faulty, the correct reflection of bus simultaneously action excision trouble point, realize bus differential protecting locking.
The method that bus differential protecting locking realized by the utilization aforesaid bus differential protecting blocking device of the present invention, please join
Examine Fig. 1 to Fig. 2, specifically can also be on the basis of previous technique scheme:When chopper 6 is in a point position, disconnecting link 7 He in isolation
When the lower disconnecting link 8 of isolation is in point position, judgement Up Highway UHW 3 and Down Highway 4 are all out of service, now do not calculate this line current；
When the lower disconnecting link 8 of isolation is in conjunction position, when in isolation, disconnecting link 7 and chopper 6 are in point position, judgement Down Highway 4 puts into state in advance,
Close behind position after chopper 6, then line current tester is flowed back to road to Down Highway 4 difference；When the upper disconnecting link 7 of isolation is in conjunction position, under isolation
When disconnecting link 8 and chopper 6 are in point position, judge that Up Highway UHW 3 puts into state in advance, behind chopper 6 conjunction position, then by line current
Count and flow back to road to Up Highway UHW 3 difference；When the lower disconnecting link 8 of isolation is in a point position, when in isolation, disconnecting link 7 and chopper 6 are in closing position, sentence
Alignment road operates in Up Highway UHW 3, and line current tester flows back to road to Up Highway UHW 3 difference；When the upper disconnecting link 7 of isolation is in a point position, under isolation
When disconnecting link 8 and chopper 6 are in closing position, judge that circuit operates in Down Highway 4, line current tester flows back to road to Down Highway 4 difference；
When the upper disconnecting link 7 of described isolation, the lower disconnecting link 8 of isolation and chopper 6, any one processes undefined position, then not by line current tester
Flow back to road to Up Highway UHW 3 difference and Down Highway 4 difference flows back to road, send and execute warning instruction, and then realize bus differential protecting and close
Lock.
Above-mentioned only several specific embodiments in the present invention are illustrated, but can not be used as whole protections of the present invention
Scope, the equivalence changes done by design spirit in every foundation present invention or modification or equal proportion zoom in or out, all
It is deemed to fall protection scope of the present invention.
Claims (7)
1. bus differential protecting blocking device it is characterised in that：Including the central location connecting and at least one spacer units, institute
State spacer units and include central processing unit, Up Highway UHW, Down Highway, disconnecting link, the lower disconnecting link of isolation and chopper in isolation, described central authorities
Processor passes through the upper disconnecting link of isolation, the lower disconnecting link of isolation, chopper and the connection line between them respectively by described centre
The loop being formed between reason device and described Up Highway UHW and described Down Highway is switched on or switched off, and described central location includes information processing
Unit, condition adjudgement unit and command unit, the outfan of described spacer units is connected with described information processing unit, described
Command unit is connected with the input of described spacer units, and in isolation, disconnecting link one end is connected with Up Highway UHW, described isolation above disconnecting link
Other end make and break contact pass through the first optic coupling element and the second optic coupling element respectively and be connected with central processing unit, described isolate under
Disconnecting link one end is connected with Down Highway, and the other end make and break contact of the lower disconnecting link of described isolation passes through the 3rd optic coupling element and the 4th respectively
Optic coupling element is connected with central processing unit, and the make and break contact of described chopper passes through the 5th optic coupling element and the 6th optocoupler unit respectively
Part is connected with central processing unit.
2. bus differential protecting blocking device according to claim 1 it is characterised in that：Described chopper is mutual with an electric current
Sensor connects, and described current transformer is connected with the information process unit of described spacer units, and described information processing unit includes
A/D converter.
3. bus differential protecting blocking device according to claim 2 it is characterised in that：Described A/D converter bag
Include microprocessor, main memory, internally stored program bin and house dog.
4. the bus differential protecting blocking device according to claim 1 or 2 or 3 it is characterised in that：Described isolation upper slitter
Lock, the lower disconnecting link of isolation and chopper all comprise a passive normal opened contact and a passive normally closed contact.
5. the bus differential protecting blocking device according to claim 1 or 2 or 3 it is characterised in that：In described spacer units
It is provided with actuation of an alarm unit.
6. the side of bus differential protecting locking is realized using the bus differential protecting blocking device described in claim 1 or 2 or 3
Method it is characterised in that：Comprise the following steps：
A. determine bus section, busbar section；By being defeated by the Up Highway UHW of spacer units, Down Highway, disconnecting link in isolation, the lower disconnecting link of isolation and disconnected
The mode of road device signal is so that central processing unit is in conjunction come disconnecting link under determining disconnecting link in above-mentioned isolation, isolating and chopper
Position or point position；
B. judge system mode：Judge the state of each bus of system according to topological Terms and topological diagram, all of bus section, busbar section is judged
State is gone forward side by side and is about to data message and is sent to central location；
C. central location is processed：The information process unit receiving data information of central location is simultaneously processed to this information, determines
Up Highway UHW and Down Highway image mode, the state of each topological Terms of condition adjudgement unit judges, divide protection section, pass through to open up simultaneously
Flutter a state determines to send whether count respective bus bars section by closing integral bus bar differential protection blocking device or by electric current
Signal；
D. spacer units response：Spacer units receive the command signal that sends of command unit and execute this signal：Or close or count
Enter respective bus bars section.
7. the method realizing bus differential protecting locking using bus differential protecting blocking device according to claim 6,
It is characterized in that：When chopper is in a point position, when in isolation, disconnecting link and the lower disconnecting link of isolation are in point position, judge Up Highway UHW with
Bus is all out of service, does not now calculate this line current；When the lower disconnecting link of isolation is in conjunction position, in isolation, disconnecting link and chopper are equal
When being in point position, judge that Down Highway puts into state in advance, close behind position after chopper, then line current tester is flowed back to Down Highway difference
Road；When the upper disconnecting link of isolation is in conjunction position, when the lower disconnecting link of isolation and chopper are in point position, judgement Up Highway UHW puts into state in advance,
Close behind position after chopper, then line current tester is flowed back to road to Up Highway UHW difference；When the lower disconnecting link of isolation is in a point position, disconnecting link in isolation
When being in closing position with chopper, judge that circuit operates in Up Highway UHW, line current tester flows back to road to Up Highway UHW difference；When in isolation
Disconnecting link is in a point position, when the lower disconnecting link of isolation and chopper are in closing position, judges that circuit operates in Down Highway, line current tester is extremely
Down Highway difference flows back to road；When the upper disconnecting link of described isolation, the lower disconnecting link of isolation and chopper, any one processes undefined position, then not
Line current tester to Up Highway UHW difference is flowed back to road and Down Highway difference flows back to road, send and execute warning instruction.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310576654.4A CN103606903B (en) | 2013-11-18 | 2013-11-18 | Bus differential motion protection locking device and method for realizing bus differential motion protection locking by utilizing bus differential motion protection locking device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201310576654.4A CN103606903B (en) | 2013-11-18 | 2013-11-18 | Bus differential motion protection locking device and method for realizing bus differential motion protection locking by utilizing bus differential motion protection locking device |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103606903A CN103606903A (en) | 2014-02-26 |
| CN103606903B true CN103606903B (en) | 2017-02-22 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201310576654.4A Active CN103606903B (en) | 2013-11-18 | 2013-11-18 | Bus differential motion protection locking device and method for realizing bus differential motion protection locking by utilizing bus differential motion protection locking device |
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| Country | Link |
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| CN (1) | CN103606903B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112736868A (en) * | 2020-12-23 | 2021-04-30 | 国网浙江省电力有限公司金华供电公司 | 5G intelligent distributed distribution network protection system |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101609979A (en) * | 2009-07-24 | 2009-12-23 | 南京南瑞继保电气有限公司 | OO bus protection setting method |
| CN101694505A (en) * | 2009-09-24 | 2010-04-14 | 江苏省电力公司南通供电公司 | Method for simulating load test with transformer substation bus differential protection current |
| CN101800442A (en) * | 2010-03-29 | 2010-08-11 | 许继集团有限公司 | Intelligent transformer substation voltage switching and paralleling method and device |
| CN201789272U (en) * | 2010-04-30 | 2011-04-06 | 金华电业局 | Relay protection circuit preventing transformer differential protection malfunction |
| CN102088185A (en) * | 2009-12-02 | 2011-06-08 | 河南省电力公司许昌供电公司 | Bus differential protection method |
| CN102623965A (en) * | 2011-01-27 | 2012-08-01 | 宝山钢铁股份有限公司 | Implementation method and device for bus protection in double bus system |
-
2013
- 2013-11-18 CN CN201310576654.4A patent/CN103606903B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101609979A (en) * | 2009-07-24 | 2009-12-23 | 南京南瑞继保电气有限公司 | OO bus protection setting method |
| CN101694505A (en) * | 2009-09-24 | 2010-04-14 | 江苏省电力公司南通供电公司 | Method for simulating load test with transformer substation bus differential protection current |
| CN102088185A (en) * | 2009-12-02 | 2011-06-08 | 河南省电力公司许昌供电公司 | Bus differential protection method |
| CN101800442A (en) * | 2010-03-29 | 2010-08-11 | 许继集团有限公司 | Intelligent transformer substation voltage switching and paralleling method and device |
| CN201789272U (en) * | 2010-04-30 | 2011-04-06 | 金华电业局 | Relay protection circuit preventing transformer differential protection malfunction |
| CN102623965A (en) * | 2011-01-27 | 2012-08-01 | 宝山钢铁股份有限公司 | Implementation method and device for bus protection in double bus system |
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|---|---|
| CN103606903A (en) | 2014-02-26 |
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