CN103606903A - 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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- CN103606903A CN103606903A CN201310576654.4A CN201310576654A CN103606903A CN 103606903 A CN103606903 A CN 103606903A CN 201310576654 A CN201310576654 A CN 201310576654A CN 103606903 A CN103606903 A CN 103606903A
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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 locking device, particularly relate to bus differential protecting locking device.
The invention still further relates to blocking method, particularly utilize above-mentioned bus differential protecting locking device to realize the method for bus differential protecting locking.
Background technology
In existing power system operation mode; because equipment wiring is complicated; the reasons such as equipment performance is uneven, field operator's operation; often can cause bus protection after operation in the judgement of generation equipment actual motion state and protective device do not meet, and the bus differential protection mistake that extremely causes of equipment state by original paper Current calculation to problems such as non-correct protection section, mistake alarm mistake latch-up protection devices.
Summary of the invention
The present invention completes in order to solve above-mentioned deficiency of the prior art; the object of this invention is to provide and a kind ofly by each topologys such as isolation switch, circuit breaker, central processing unit, connection lines, form mutually basic topological structure; and the simulation such as contact, operation condition, sequencing and the mutual alignment between it shows by topological diagram; determine bus; and startup monitors bus running status; when protecting bus to having fault, bus correctly reflects and moves and excise the bus differential protecting locking device of fault point.
Bus differential protecting locking device of the present invention, central location and at least one unit, interval of comprising connection, unit, described interval comprises central processing unit, Up Highway UHW, Down Highway, disconnecting link in isolation, the lower disconnecting link of isolation and circuit breaker, described central processing unit is gone up disconnecting link by isolation, the lower disconnecting link of isolation, circuit breaker and the connection line between them are switched on or switched off the loop forming between described central processing unit and described Up Highway UHW and described Down Highway respectively, described central location comprises information process unit, state judging unit and command unit, the output of unit, described interval is connected with described information process unit, described command unit is connected with the input of unit, described interval.
Bus differential protecting locking device of the present invention can also be:
In isolation, disconnecting link one end is connected with Up Highway UHW, in described isolation, the other end make and break contact of disconnecting link is connected with central processing unit with the second optic coupling element by the first optic coupling element respectively, under described isolation, disconnecting link one end is connected with Down Highway, under described isolation, the other end make and break contact of disconnecting link is connected with central processing unit with the 4th optic coupling element by the 3rd optic coupling element respectively, and the make and break contact of described circuit breaker is connected with central processing unit with the 6th optic coupling element by the 5th optic coupling element respectively.
Described circuit breaker is connected with a current transformer, and described circuit instrument transformer is connected with the information process unit of unit, described interval, and described information process unit comprises A/D converter.
Described A/D converter comprises microprocessor, main memory, internally stored program holder and house dog.
In described isolation, disconnecting link, the lower disconnecting link of isolation and circuit breaker all comprise a passive normal opened contact and a passive normally closed contact.
Described interval is provided with actuation of an alarm unit in unit.
Bus differential protecting locking device of the present invention, it comprises central location and at least one unit, interval of connection, unit, described interval comprises central processing unit, Up Highway UHW, Down Highway, disconnecting link in isolation, the lower disconnecting link of isolation and circuit breaker, described central processing unit is gone up disconnecting link by isolation, the lower disconnecting link of isolation, circuit breaker and the connection line between them are switched on or switched off the loop forming between described central processing unit and described Up Highway UHW and described Down Highway respectively, described central location comprises information process unit, state judging unit and command unit, the output of unit, described interval is connected with described information process unit, described command unit is connected with the input of unit, described interval.Like this bus differential protecting locking device with respect to the advantage of prior art, be: by each topologys such as isolation switch, circuit breaker, central processing unit, connection lines, form mutually basic topological structure; and the simulation such as contact, operation condition, sequencing and the mutual alignment between it shows by topological diagram; determine bus; and startup monitors bus running status; when protecting bus to having fault, bus correctly reflects and moves and excise fault point.
Another object of the present invention is to provide a kind of utilization above-mentioned can pass through isolation switch, circuit breaker, central processing unit, each topology such as connection line forms basic topological structure mutually, and the contact between it by topological diagram, operation condition, the simulation such as sequencing and mutual alignment shows, determine bus, and start the protection calculation method under corresponding states, monitor bus running status, the effect of protection bus and each element, so that while having fault, bus correctly reflect and moves the differential protection locking device that excises fault point realizes the method for bus differential protecting locking.
The method of utilizing bus differential protecting locking device to realize bus differential protecting locking of the present invention, comprises the following steps:
A. determine bus section, busbar section; By being defeated by the mode of disconnecting link, the lower disconnecting link of isolation and breaker signal on the Up Highway UHW, Down Highway, isolation of unit, interval, make central processing unit determine disconnecting link in above-mentioned isolation, isolation down disconnecting link and circuit breaker in still minute position of co-bit;
B. judge system mode: according to the state of each bus of Topological Terms and topological diagram judgement system, all bus section, busbar section decision state are gone forward side by side and are about to data message and are sent to central location;
C. central location is processed: the information process unit receiving data information of central location is also processed this information, determine Up Highway UHW and Down Highway image mode, state judging unit judges the state of each topological phase, divide protection section, by topological phase state, determine and whether send and will close integral bus bar differential protection locking device or electric current be counted to the signal of respective bus bars section simultaneously;
D. interval cell response: unit, interval receives the command signal that command unit sends and also carries out this signal: or close or count respective bus bars section.
The method of utilizing bus differential protecting locking device to realize bus differential protecting locking of the present invention, owing to having adopted above-mentioned steps, pass through isolation switch, circuit breaker, central processing unit, each topology such as connection line forms basic topological structure mutually, and the contact between it by topological diagram, operation condition, the simulation such as sequencing and mutual alignment shows, determine bus, and start the protection calculation method under corresponding states, monitor bus running status, the effect of protection bus and each element, so that while having fault, bus correctly reflects and moves and excise fault point, realize bus differential protecting locking.
Accompanying drawing explanation
Fig. 1 bus differential protecting locking device of the present invention embodiment schematic diagram.
The overall connection diagram of Fig. 2 bus differential protecting locking device of the present invention embodiment.
Figure number explanation
1 ... unit, interval 2 ... central location 3 ... Up Highway UHW
4 ... Down Highway 5 ... central processing unit 6 ... circuit breaker
7 ... in isolation, disconnecting link 8 ... the lower disconnecting link 9 of isolation ... the first optic coupling element
10 ... the second optic coupling element 11 ... the 3rd optic coupling element 12 ... the 4th optic coupling element
13 ... the 5th optic coupling element 14 ... the 6th optic coupling element 15 ... current transformer
17 ... A/D converter
Embodiment
Below in conjunction with Fig. 1 to Fig. 2 of accompanying drawing to bus differential protecting locking device of the present invention and utilize its method that realizes bus differential protecting locking to be described in further detail.
Bus differential protecting locking device of the present invention, please refer to Fig. 1 to Fig. 2, central location 2 and at least one unit, interval 1 of comprising connection, unit, described interval 1 comprises central processing unit 5, Up Highway UHW 3, Down Highway 4, in isolation, disconnecting link 7, the lower disconnecting link 8 of isolation and circuit breaker 6, described central processing unit 5 is gone up disconnecting link 7 by isolation, the lower disconnecting link 8 of isolation, circuit breaker 6 and the connection line between them are switched on or switched off the loop forming between described central processing unit 5 and described Up Highway UHW 3 and described Down Highway 4 respectively, described central location 2 comprises information process unit, state judging unit and command unit, the output of unit, described interval is connected with described information process unit, described command unit is connected with the input of unit, described interval 1.Like this bus differential protecting locking device with respect to the advantage of prior art, be: by each topologys such as isolation switch, circuit breaker 6, central processing unit 5, connection lines, form mutually basic topological structure; and the simulation such as contact, operation condition, sequencing and the mutual alignment between it shows by topological diagram; determine bus and monitor bus running status; protection bus; so that while having fault, bus correctly reflects and moves and excise fault point.Like this; in system running; disconnecting link 7 in isolation, the lower disconnecting link 8 of isolation and circuit breaker 6 and central processing unit 5 pass through the different break-make modes of the connection line between them; determine and judge operational mode and the running status of Up Highway UHW 3 and Down Highway 4; and the line current of counting period unit 1 and spill current; send instruction, realize bus differential protecting locking.
Bus differential protecting locking device of the present invention, please refer to Fig. 1 to Fig. 2, on the basis of previous technique scheme, can be specifically that in isolation, disconnecting link 7 one end are connected with Up Highway UHW 3, in described isolation, the other end make and break contact of disconnecting link 7 is connected with central processing unit 5 with the second optic coupling element 10 by the first optic coupling element 9 respectively, under described isolation, disconnecting link 8 one end are connected with Down Highway 4, under described isolation, the other end make and break contact of disconnecting link 8 is connected with central processing unit 5 with the 4th optic coupling element 12 by the 3rd optic coupling element 11 respectively, the make and break contact of described circuit breaker 6 is connected with central processing unit 5 with the 6th optic coupling element 14 by the 5th optic coupling element 13 respectively.
Make a concrete analysis of as follows:
In central processing unit 5, Up Highway UHW 3, Down Highway 4, isolation, disconnecting link 7, the lower disconnecting link 8 of isolation, circuit breaker 6 and connection line thereof form topological phase.
1. state 1(shut down condition)
Circuit breaker 6 is in a minute position, and in isolation, the lower disconnecting link 8 of disconnecting link 7 and isolation is being cut position, and this line is stopped transport, and does not calculate line current.
Idiographic flow:
(1) in isolation, disconnecting link 7 " divides ", and in isolation, disconnecting link 7 is that Q1(ON disconnects, and OFF is closed---and through the first optic coupling element 9 and the second optic coupling element 10, entering central processing unit 5 is CPU, and the upper disconnecting link 7Q1 of CPU judgement isolation is in " dividing " position.
(2) the lower disconnecting link 8 of isolation " divides ", and the lower disconnecting link 8 of isolation is that Q2(ON disconnects, and OFF is closed)---through the 3rd optic coupling element 11 and the 4th optic coupling element 12, enter central processing unit 5CPU, the lower disconnecting link 8Q2 of CPU judgement isolation is in " dividing " position.
(3) circuit breaker 6 " divides ", and circuit breaker 6 is that Q0(ON disconnects, and OFF is closed)---through the 5th optic coupling element 13 and the 6th optic coupling element 14, enter central processing unit 5, central processing unit 5 judgement circuit breaker 6Q0 are in " dividing " position.
Protection blocking device is according to the state of these Topological Terms, judges that circuit is out of service, so time do not calculate this line current.
2. state 2(drops into Down Highway 4 states in advance)
Circuit breaker 6Q0 is in a minute position, and Q2 (isolating lower disconnecting link 8), in co-bit, drops into Down Highway 4, after Q0 (circuit breaker 6) closes, line current tester to lower female difference is flowed back to road.
Idiographic flow:
(1) Q1 (in isolation, disconnecting link 7) " dividing ",---Q1(ON disconnects, and OFF is closed)---through the first optic coupling element 9 and the second optic coupling element 10, enter central processing unit 5CPU, CPU judgement Q1 is in " dividing " position.
(2) Q2 (the lower disconnecting link 8 of isolation) " closing ",---Q2(ON is closed, and OFF disconnects)---through the 3rd optic coupling element 11 and the 4th optic coupling element 12, enter central processing unit 5CPU, CPU judgement Q2 is in " closing " position.
(3) Q0 (circuit breaker 6) temporary transient " dividing ", circuit breaker 6Q0(ON disconnects, OFF is closed)---through the 5th optic coupling element 13 and the 6th optic coupling element 14, enter central processing unit 5CPU, CPU judgement Q0 is in " dividing " position.
Protective device, according to the state of these Topological Terms, judges that circuit is at Down Highway 4, after Q0 " closes ", then line current tester to lower female difference is flowed back to road.
3. state 3(drops into Up Highway UHW 3 states in advance)
Q0(circuit breaker 6) in a minute position, Q1 (in isolation, disconnecting link 7), in co-bit, drops into Up Highway UHW 3, after Q0 (circuit breaker 6) closes, the supreme female difference of line current tester is flowed back to road.
Idiographic flow:
(1) Q1 (in isolation, disconnecting link 7) " closing ", in isolation, disconnecting link 7Q1(ON is closed, OFF disconnects)---through the first optic coupling element 9 and the second optic coupling element 10, enter central processing unit 5CPU, CPU judgement Q1 is in " closing " position.
(2) Q2 (the lower disconnecting link 8 of isolation) " dividing ", the lower disconnecting link 8Q2(ON of isolation disconnects, OFF is closed)---through the 3rd optic coupling element 11 and the 4th optic coupling element 12, enter central processing unit 5CPU, CPU judgement Q2 is in " dividing " position.
(3) Q0 (circuit breaker 6) temporary transient " dividing ", circuit breaker 6Q0(ON disconnects, OFF is closed)---through the 5th optic coupling element 13 and the 6th optic coupling element 14, enter central processing unit 5CPU, CPU judgement Q0 is in " dividing " position.
Protective device, according to the state of these Topological Terms, judges that circuit operates in Up Highway UHW 3, after Q0 " closes ", then by the supreme female poor road of flowing back to of line current tester.
4. state 4(has operated in Up Highway UHW 3 states)
Circuit breaker 6Q0 is in co-bit, and Q1 (in isolation, disconnecting link 7) is in " closing " position, and Q2 (the lower disconnecting link 8 of isolation) " dividing ", operates in Up Highway UHW 3,, Q0 (circuit breaker 6) is in " closing " position, by the supreme female poor road of flowing back to of line current tester.
Idiographic flow:
(1) Q1 (in isolation, disconnecting link 7) " closing ", in isolation, disconnecting link 7Q1(ON is closed, OFF disconnects)---through the first optic coupling element 9 and the second optic coupling element 10, enter central processing unit 5CPU, CPU judgement Q1 is in " closing " position.
(2) Q2 (the lower disconnecting link 8 of isolation) " dividing ", the lower disconnecting link 8Q2(ON of isolation disconnects, OFF is closed)---through the 3rd optic coupling element 11 and the 4th optic coupling element 12, enter central processing unit 5CPU, CPU judgement Q2 is in " dividing " position.
(3) Q0 (circuit breaker 6) " closing ", circuit breaker 6Q0(ON is closed, OFF disconnects)---through the 5th optic coupling element 13 and the 6th optic coupling element 14, enter central processing unit 5CPU, CPU judgement Q0 is in " closing " position.
Protective device, according to the state of these Topological Terms, judges that circuit operates in Up Highway UHW 3, by the supreme female poor road of flowing back to of line current tester.
5. state 5(has operated in Down Highway 4 states)
Circuit breaker 6Q0 is in co-bit, and Q1 (in isolation, disconnecting link 7) is in " dividing " position, and Q2 (the lower disconnecting link 8 of isolation) " closing ", operates in Down Highway 4,, Q0 (circuit breaker 6) is in " closing " position, by the extremely lower female poor road of flowing back to of line current tester.
Idiographic flow:
(1) Q1 (in isolation, disconnecting link 7) " dividing ",---Q1(ON disconnects, and OFF is closed)---through through the first optic coupling element 9 and the second optic coupling element 10, enter central processing unit 5CPU, CPU judgement Q1 is in " dividing " position.
(2) Q2 (the lower disconnecting link 8 of isolation) " closing ",---Q2(ON disconnects, and OFF is closed)---through the 3rd optic coupling element 11 and the 4th optic coupling element 12, enter central processing unit 5CPU, CPU judgement Q2 is in " closing " position.
(3) Q0 (circuit breaker 6) " closing ",---Q0(ON is closed, and OFF disconnects)---through the 5th optic coupling element 13 and the 6th optic coupling element 14, enter central processing unit 5CPU, CPU judgement Q0 is in " closing " position.
Protective device, according to the state of these Topological Terms, judges that circuit operates in Down Highway 4, and line current tester to lower female difference is flowed back to road.
6. state 6(goes up disconnecting link abnormality)
Circuit breaker 6Q0 is in co-bit, and Q1 (in isolation, disconnecting link 7) position is uncertain, and Q2 (the lower disconnecting link 8 of isolation) " closing ", by the supreme female poor road of flowing back to of line current tester.Send alarm!
Idiographic flow:
(1) Q1 (in isolation, disconnecting link 7) position is uncertain, and in isolation, disconnecting link 7Q1(ON disconnects, and OFF disconnects)---through the first optic coupling element 9 and the second optic coupling element 10, enter central processing unit 5CPU, Q1 is uncertain in position in CPU judgement, abnormal condition.
(2) Q2 (the lower disconnecting link 8 of isolation) " closing ", lower disconnecting link 8Q2(ON is closed in isolation, OFF disconnects)---through the 3rd optic coupling element 11 and the 4th optic coupling element 12, enter central processing unit 5CPU, CPU judgement Q2 is in " closing " position.
(3) Q0 (circuit breaker 6) " closing ", circuit breaker 6Q0(ON is closed, OFF disconnects)---through the 5th optic coupling element 13 and the 6th optic coupling element 14, enter central processing unit 5CPU, CPU judgement Q0 is in " closing " position.
Protective device, according to the state of these Topological Terms, is judged circuit disconnecting link abnormal state, not by the supreme female poor road of flowing back to of line current tester.Send alarm simultaneously!
7. disconnecting link abnormality under state 7()
Circuit breaker 6Q0 is in co-bit, Q1 (in isolation, disconnecting link 7) " closing ", Q2 (the lower disconnecting link 8 of isolation) position is uncertain, by line current tester to lower female poor road of not flowing back to.Send alarm simultaneously!
Idiographic flow:
(1) Q1 (in isolation, disconnecting link 7) " closing ", in isolation, disconnecting link 7Q1(ON closes, OFF disconnects)---through the first optic coupling element 9 and the second optic coupling element 10, enter central processing unit 5CPU, CPU judgement Q1 is in " closing " position.
(2) Q2 (the lower disconnecting link 8 of isolation) position is uncertain, and the lower disconnecting link 8Q2(ON of isolation disconnects, and OFF disconnects)---through the 3rd optic coupling element 11 and the 4th optic coupling element 12, enter central processing unit 5CPU, CPU judgement Q2 position is uncertain.
(3) Q0 (circuit breaker 6) " closing ", circuit breaker 6Q0(ON is closed, OFF disconnects)---through the 5th optic coupling element 13 and the 6th optic coupling element 14, enter central processing unit 5CPU, CPU judgement Q0 is in " closing " position.
Protective device, according to the state of these Topological Terms, is judged circuit disconnecting link abnormal state, line current tester to lower female difference is not flowed back to road.Send alarm simultaneously!
8. state 8(circuit breaker 6 abnormalities)
Circuit breaker 6Q0 position is uncertain, Q1 (in isolation, disconnecting link 7) " closing ", and Q2 (the lower disconnecting link 8 of isolation) " dividing ", does not flow back to road by line current tester to female difference.Send alarm simultaneously!
Idiographic flow:
(1) Q1 (in isolation, disconnecting link 7) " closing ",---in isolation, disconnecting link 7Q1(ON closes, and OFF disconnects)---through the first optic coupling element 9 and the second optic coupling element 10, enter central processing unit 5CPU, CPU judgement Q1 is in " closing " position.
(2) Q2 (the lower disconnecting link 8 of isolation) " dividing ",---the lower disconnecting link 8Q2(ON of isolation disconnects, and OFF is closed)---through the 3rd optic coupling element 11 and the 4th optic coupling element 12, enter central processing unit 5CPU, CPU judgement Q2 is in " dividing " position.
(3) Q0 (circuit breaker 6) position is uncertain,---circuit breaker 6Q0(ON disconnects, and OFF disconnects)---through the 5th optic coupling element 13 and the 6th optic coupling element 14, enter central processing unit 5CPU, CPU judgement Q0 is in " closing " position.
Protective device, according to the state of these Topological Terms, is judged line-breaker 6 abnormal states, line current tester to female difference is not flowed back to road.Send alarm simultaneously!
Bus differential protecting locking device of the present invention; please refer to Fig. 1 to Fig. 2; on the basis of foregoing technical scheme; can also be that described circuit breaker 6 is connected with a current transformer 15; described circuit instrument transformer is connected with the information process unit of unit, described interval 1, and described information process unit comprises A/D converter 17.Described current transformer 15, for by the high-voltage great-current of the last side of circuit, converts the little electric current of secondary to for bus differential protecting locking device.And A/D converter 17, this is by the analog quantity of input, is converted to digital signal for bus differential protecting locking device after filtering.By input variable is carried out to A/D conversion, can the digital signal of generation be for further processing by programmable microprocessor.Advantage: 1. by digitized processing, feeder current is carried out weekly to the sampling of 48 times.Even during larger through fault current, measure and still can keep stable.2. pair current sampling signal carries out Fourier transform, makes the processing of carrying out subsequently only be aimed at fundametal compoment.Do not need current transformer to meet any special requirement, even, when generation current transformer is saturated, protection still can correctly be distinguished internal fault and external fault.Further preferred technical scheme is: described A/D converter 17 comprises microprocessor, main memory, internally stored program holder and house dog.Important hardware device is carried out to different tests, and house dog is the correctness of surveillance function continuously, also by processing bus, monitors continuously the correctness of exchanges data.Each output channel comprises two redundancy commands, and it is opened at regular intervals by house dog, if do not meet house dog condition, and this passage of locking.In addition, can also be that the lower disconnecting link 8 of disconnecting link 7 in described isolation, isolation and circuit breaker 6 all comprise a passive normal opened contact and a passive normally closed contact.Like this, when in isolation, disconnecting link 7, lower disconnecting link 8 positions of isolation or bus 6 are by " combined floodgate ", normal opened contact (N/O) signals; When in isolation, disconnecting link 7, lower disconnecting link 8 positions of isolation or bus 6 are by " separating brake ", normally closed contact (N/C) signals.
When the upper disconnecting link 7 of isolation that closes, the lower disconnecting link 8 of isolation or bus 6, normal opened contact need be in a period of time before main contact contact clearance is decreased to conducting puncture place (about 0.15s) in closure.
An algorithm, for monitoring the stable state of isolation switch signal voltage, checks that each isolation switch only presents a state in two position, or from splice grafting point is checked through voltage, or is checked through voltage from tapping point.If occur that two signals or two signals disappear, and send alarm signal simultaneously simultaneously.
On opening an isolation when disconnecting link 7, the lower disconnecting link 8 of isolation or bus 6, normal opened contact must the gap between main contact contact develops in a period of time before the conducting puncture place that can not light over electric arc and still during this period of time remains closed (not in open position).If can not do like this,, before the withstand voltage of setting up between main contact contact, normal opened contact signal " not remaining co-bit puts ", never will adopt normally closed contact signal, and it was " open position " before main contact contact reaches withstand voltage always.Can also be to be provided with actuation of an alarm unit in unit, described interval 1 in addition.After alarm command sends, unit, interval 1 receives this instruction, and the action of actuation of an alarm unit, sends alarm signal.
Of the present inventionly utilize aforesaid bus differential protecting locking device to realize the method for bus differential protecting locking, please refer to Fig. 1 to Fig. 2, comprise the following steps:
A. determine bus section, busbar section; By being defeated by the mode of disconnecting link 7, the lower disconnecting link 8 of isolation and circuit breaker 6 signals on the Up Highway UHW 3, Down Highway 4, isolation of unit, interval 1, make central processing unit 5 determine disconnecting link 7 in above-mentioned isolation, isolation down disconnecting link 8 and circuit breaker 6 in still minute position of co-bit;
B. judge system mode: according to the state of each bus of Topological Terms and topological diagram judgement system, all bus section, busbar section decision state are gone forward side by side and are about to data message and are sent to central location 2;
C. central location 2 is processed: the information process unit receiving data information of central location 2 is also processed this information, determine Up Highway UHW 3 and Down Highway 4 image modes, state judging unit judges the state of each topological phase, divide protection section, by topological phase state, determine and whether send and will close integral bus bar differential protection locking device or electric current be counted to the signal of respective bus bars section simultaneously;
D. unit, interval 1 response: the command signal that unit, interval 1 reception command unit sends is also carried out this signal: or close or count respective bus bars section.
Owing to having adopted above-mentioned steps; by each topologys such as isolation switch, circuit breaker 6, central processing unit 5, connection lines, form mutually basic topological structure; and the simulation such as contact, operation condition, sequencing and the mutual alignment between it shows by topological diagram; determine bus; and start the protection calculation method under corresponding states; monitor bus running status; the effect of protection bus and each element; so that while having fault; bus correctly reflects and moves and excise fault point, realizes bus differential protecting locking.
Of the present inventionly utilize aforesaid bus differential protecting locking device to realize the method for bus differential protecting locking, please refer to Fig. 1 to Fig. 2, on the basis of previous technique scheme, can also be specifically: when circuit breaker 6 is in a minute position, in isolation, the lower disconnecting link 8 of disconnecting link 7 and isolation is all when dividing position, judge that Up Highway UHW 3 and Down Highway 4 are all out of service, now do not calculate this line current; When isolating lower disconnecting link 8 in co-bit, in isolation, disconnecting link 7 and circuit breaker 6, all when dividing position, are judged the pre-input state of Down Highway 4, after circuit breaker 6 co-bits, then line current tester to Down Highway 4 differences are flowed back to road; When the upper disconnecting link 7 of isolation is in co-bit, under isolating, disconnecting link 8 and circuit breaker 6, all when dividing position, are judged the pre-input state of Up Highway UHW 3, after circuit breaker 6 co-bits, then line current tester to Up Highway UHW 3 differences are flowed back to road; When the lower disconnecting link 8 of isolation is in a minute position, in isolation, disconnecting link 7 and circuit breaker 6, all when co-bit, judge that circuit operates in Up Highway UHW 3, and line current tester is to the poor road of flowing back to of Up Highway UHW 3; When the upper disconnecting link 7 of isolation is in a minute position, the lower disconnecting link 8 of isolation and circuit breaker 6 all, when co-bit, judge that circuit operates in Down Highway 4, and line current tester is to the poor road of flowing back to of Down Highway 4; Disconnecting link 7, the lower disconnecting link 8 of isolation and circuit breaker 6 any one processing undefined position in described isolation, do not flow back to road by line current tester to Up Highway UHW 3 differences and Down Highway 4 differences flow back to road, sends and carry out warning instruction, and then realize bus differential protecting locking.
Above-mentionedly only several specific embodiments in the present invention are illustrated; but can not be as whole protection ranges of the present invention; every equivalence variation of having done according to the design spirit in the present invention or modification or equal proportion zoom in or out etc., all should think and fall into protection scope of the present invention.
Claims (8)
1. bus differential protecting locking device, it is characterized in that: central location and at least one unit, interval of comprising connection, unit, described interval comprises central processing unit, Up Highway UHW, Down Highway, disconnecting link in isolation, the lower disconnecting link of isolation and circuit breaker, described central processing unit is gone up disconnecting link by isolation, the lower disconnecting link of isolation, circuit breaker and the connection line between them are switched on or switched off the loop forming between described central processing unit and described Up Highway UHW and described Down Highway respectively, described central location comprises information process unit, state judging unit and command unit, the output of unit, described interval is connected with described information process unit, described command unit is connected with the input of unit, described interval.
2. bus differential protecting locking device according to claim 1, it is characterized in that: in isolation, disconnecting link one end is connected with Up Highway UHW, in described isolation, the other end make and break contact of disconnecting link is connected with central processing unit with the second optic coupling element by the first optic coupling element respectively, under described isolation, disconnecting link one end is connected with Down Highway, under described isolation, the other end make and break contact of disconnecting link is connected with central processing unit with the 4th optic coupling element by the 3rd optic coupling element respectively, the make and break contact of described circuit breaker is connected with central processing unit with the 6th optic coupling element by the 5th optic coupling element respectively.
3. bus differential protecting locking device according to claim 2; it is characterized in that: described circuit breaker is connected with a current transformer; described circuit instrument transformer is connected with the information process unit of unit, described interval, and described information process unit comprises A/D converter.
4. bus differential protecting locking device according to claim 3, is characterized in that: described A/D converter comprises microprocessor, main memory, internally stored program holder and house dog.
5. according to the bus differential protecting locking device described in claim 1 or 2 or 3 or 4, it is characterized in that: in described isolation, disconnecting link, the lower disconnecting link of isolation and circuit breaker all comprise a passive normal opened contact and a passive normally closed contact.
6. according to the bus differential protecting locking device described in claim 1 or 2 or 3 or 4, it is characterized in that: described interval is provided with actuation of an alarm unit in unit.
7. utilize bus differential protecting locking device described in claim 1 or 2 or 3 or 4 to realize the method for bus differential protecting locking, it is characterized in that: comprise the following steps:
A. determine bus section, busbar section; By being defeated by the mode of disconnecting link, the lower disconnecting link of isolation and breaker signal on the Up Highway UHW, Down Highway, isolation of unit, interval, make central processing unit determine disconnecting link in above-mentioned isolation, isolation down disconnecting link and circuit breaker in still minute position of co-bit;
B. judge system mode: according to the state of each bus of Topological Terms and topological diagram judgement system, all bus section, busbar section decision state are gone forward side by side and are about to data message and are sent to central location;
C. central location is processed: the information process unit receiving data information of central location is also processed this information, determine Up Highway UHW and Down Highway image mode, state judging unit judges the state of each topological phase, divide protection section, by topological phase state, determine and whether send and will close integral bus bar differential protection locking device or electric current be counted to the signal of respective bus bars section simultaneously;
D. interval cell response: unit, interval receives the command signal that command unit sends and also carries out this signal: or close or count respective bus bars section.
8. the method for utilizing bus differential protecting locking device to realize bus differential protecting locking according to claim 7, it is characterized in that: when circuit breaker is in a minute position, in isolation, the lower disconnecting link of disconnecting link and isolation is all when dividing position, judge that Up Highway UHW and Down Highway are all out of service, now do not calculate this line current; When the lower disconnecting link of isolation is in co-bit, isolation in disconnecting link and circuit breaker all in minute time, judgement Down Highway drops into state in advance, after circuit breaker co-bit, then by line current tester to the poor road of flowing back to of Down Highway; When the upper disconnecting link of isolation is in co-bit, the lower disconnecting link of isolation and circuit breaker all, when minute position, judge that Up Highway UHW drops into state in advance, after circuit breaker co-bit, then by line current tester to the poor road of flowing back to of Up Highway UHW; When the lower disconnecting link of isolation is in a minute position, in isolation, disconnecting link and circuit breaker, all when co-bit, judge that circuit operates in Up Highway UHW, and line current tester is to the poor road of flowing back to of Up Highway UHW; When the upper disconnecting link of isolation is in a minute position, the lower disconnecting link of isolation and circuit breaker all, when co-bit, judge that circuit operates in Down Highway, and line current tester is to the poor road of flowing back to of Down Highway; In described isolation disconnecting link, the lower disconnecting link of isolation and circuit breaker any one process undefined position, not by line current tester to poor road and the poor road of flowing back to of Down Highway flowed back to of Up Highway UHW, send and carry out warning instruction.
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| 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 |
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