CN101145682B - Switch controller and switch device - Google Patents
Switch controller and switch device Download PDFInfo
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- CN101145682B CN101145682B CN2007101547612A CN200710154761A CN101145682B CN 101145682 B CN101145682 B CN 101145682B CN 2007101547612 A CN2007101547612 A CN 2007101547612A CN 200710154761 A CN200710154761 A CN 200710154761A CN 101145682 B CN101145682 B CN 101145682B
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Abstract
Disclosed is a switch controller (7) used for controlling switches (6) set at a distribution line (1). The switch controller (7) comprises a fault judging mechanism (73) used for judging whether a fault occurs; a switching-on mechanism (OP) which used for outputting a switching-on signal (ST) after it is judged that a fault occurs according to the judging result; a fault frequency calculating mechanism (751) used for calculating the fault times; a switching-off lock-out mechanism (752) which is used for switching-off and locking-out the switch when the fault times is larger than the preconcerted acceptable times; a switching-off mechanism (71) which is used for applying an electric voltage at the supply side when the switching-off operation is not locked-out and outputting a switching-offsignal (SC) a predetermined time after the switch is switched-on; a switching-off affirmation mechanism (76) used for affirming whether the switch is switched-off; and a fault frequency reset mechanism used for resetting the fault times (7c) after the switching-off affirmation mechanism affirms the switching-off.
Description
Technical field
The present invention relates to a kind of on-off controller and be arranged on switchgear in the distribution system for example.
Background technology
In distribution system, electric power provides from up-stream system, and this electric power offers distribution line by circuit breaker.For example, in up-stream system, provide transformer as power supply.Distribution line has branch line.Divide distribution line by on branch line, being provided with the corresponding switchgear of each part.Each has been divided part further be divided into littler branch by switchgear is set.
In distribution system, electrical power distribution automatization system is set usually.Below, will explain of the operation of each switchgear based on electrical power distribution automatization system.
When breaking down to certain portions in the distribution system, circuit breaker and switchgear are separately all opened simultaneously.As a result, false voltage no longer is present in this distribution system.When not having false voltage, electrical power distribution automatization system is close circuit breaker once more, and begins with regular time Closing Switch equipment successively at interval from the switchgear that is placed on the up-stream system side.Hereinafter, this set time is called " acknowledging time ".If in this acknowledging time after the switchgear closure false voltage has taken place again, electrical power distribution automatization system determines that fault has occurred in the part that comprises this switchgear so.Therefore, the switchgear that is confirmed as wherein having in the part of fault is blocked (lock), thereby this switchgear can not be closed once more.Closed once more each switchgear except this switchgear of this electrical power distribution automatization system.As a result, in this distribution system, faulty component is isolated separately, and to other normal part charging (for example referring to JP-A 019158-1996[KOKAI]).
Yet electrical power distribution automatization system described above has following point.
In distribution line, be provided with large-size machine or power factor regulating capacitor.Therefore, the residual voltage of false voltage may be present on the distribution line for a long time.Therefore, must being provided with, the affirmation time of length prevents to determine mistakenly faulty component.In addition, the time difference must be had so that determine faulty component between closed each switchgear.And for isolated fault partly and is once more powered by distribution line, this circuit breaker of closure is twice once more.Similarly, must the closed once more switchgear that is arranged in the normal part.Based on these factors, give the required time of normal part feed elongated once more.
Summary of the invention
The object of the present invention is to provide a kind of on-off controller and switchgear, it can shorten to normal part required time of feed once more, and can reduce when breaking down in the distribution system number of times of closed circuit once more.
According to a scheme of the present invention, a kind of on-off controller (7) that is used for being arranged on the switch (6) of distribution line (1) is provided, described switch (6) comprises state-detection part (61), this state-detection part (61) detects the open mode of the described switch of expression (6) or the status signal (S61) of closure state, distribution line (1) comprising: current sensing means (62), and it is used for detecting the electric current that flows through described switch (6); And supply side voltage check device (3), it is used to detect the voltage on the supply side of described switch (6), on-off controller (7) comprises failure judgment device (73), and it is used for judging whether to have taken place fault based on the electric current that described current sensing means (62) is detected; First device for opening (OP), it is used for judging the time output of breaking down at described failure judgment device (73) and is used to open the opening signal (ST) of described switch (6); Failure-frequency calculation element (751), it is used for calculating based on the judged result of described failure judgment device (73) number of times of fault; Closed sealing pack (752), the closure that it blocks described switch (6) when being used for the number of stoppages that calculated at described failure-frequency calculation element (751) greater than predetermined number of times of allowing; Supply side voltage judgment means (31), it is used for judging based on the voltage that described supply side voltage check device (3) is detected whether voltage is applied in to the supply side of described switch (6); Closing device (71), it is used for judging that in closure, described supply side voltage judgment means (31) that described closed sealing pack (752) does not block described switch (6) voltage is applied in to when the described supply side of described switch (6) and the described open mode of described state-detection part (61) detected status signal (S61) expression, in first closure signal (SC) that is used for closed described switch through output after the scheduled time; Closed affirmation device (76), whether it is used for based on confirm described switch (6) from the status signal (S61) of described state-detection part (61) closed; And failure-frequency resetting means (76), it is used for resetting at the described closed number of stoppages (7C) of confirming that device (76) confirms that this switch (6) when closed is calculated described failure-frequency calculation element (751).
Description of drawings
The accompanying drawing that is included in the specification and constitutes a specification part shows embodiments of the invention, and with the general description that provides previously and hereinafter the specific embodiment explanation that provides is come together to explain principle of the present invention.
Fig. 1 shows the block diagram according to the structure of the switchgear of first embodiment of the invention;
Fig. 2 shows the block diagram according to the structure of the judgment part of first embodiment of the invention;
Fig. 3 shows the block diagram according to the function of the switchgear of first embodiment of the invention;
Fig. 4 is the time diagram that is used to explain according to the operation of each switchgear of first embodiment of the invention;
Fig. 5 shows the block diagram according to the structure of the switchgear of second embodiment of the invention;
Fig. 6 shows the block diagram according to the function of the switchgear of second embodiment of the invention;
Fig. 7 shows the block diagram according to the structure of the switchgear of third embodiment of the invention;
Fig. 8 shows the block diagram according to the structure of the judgment part of third embodiment of the invention;
Fig. 9 shows the block diagram according to the function of the switchgear of third embodiment of the invention;
Figure 10 shows the block diagram according to the structure of the switchgear of fourth embodiment of the invention;
Figure 11 shows the block diagram according to the function of the switchgear of fourth embodiment of the invention;
Figure 12 shows the block diagram according to the structure of the switchgear of fifth embodiment of the invention;
Figure 13 shows the block diagram according to the structure of the judgment part of fifth embodiment of the invention;
Figure 14 shows the block diagram according to the function of the switchgear of fifth embodiment of the invention;
Figure 15 shows the time diagram according to the operation of each switchgear of fifth embodiment of the invention;
Figure 16 shows the electric power system figure according to the position of each switchgear of first embodiment of the invention;
Figure 17 shows the electric power system figure according to the position of each switchgear of fifth embodiment of the invention; And
Figure 18 shows the block diagram according to the structure of the switchgear of the modification of second embodiment of the invention.
Embodiment
Below, will illustrate according to embodiments of the invention with reference to the accompanying drawings.
[first embodiment]
Fig. 1 shows the block diagram according to the structure of the switchgear of first embodiment of the invention.
Switchgear according to this embodiment comprises switch 6 and the controller 7 that this switch 6 is controlled.Switchgear is connected on the distribution line 1. Voltage transformer 3 and 4 is connected on this distribution line 1.
The voltage of voltage transformer 3 sense switches 6 on supply side H.Voltage transformer 3 output voltage signal S3 give controller 7, and this voltage signal S3 and detected voltage are proportional.
The voltage of voltage transformer 4 sense switches 6 on load-side L.Voltage transformer 4 output voltage signal S4 give controller 7, and this voltage signal S4 and detected voltage are proportional.
When switch sections 60 was opened, distribution line 1 disconnected.When switch sections 60 closures, distribution line 1 connects.
The flow through electric current of distribution line 1 of 62 pairs of current transformers detects.This current transformer 62 output current signal S62 give controller 7, and this current signal S62 and detected electric current are proportional.
State-detection part 61 output status signal S61 give controller 7.This status signal S61 represents the state of switch sections 60.When switch sections 60 was opened, this status signal S61 became " 0 ".When switch sections 60 was in closure state, this status signal S61 became " 1 ".
The status signal S61 of closed control section 71 accepting state test sections, 61 outputs.Closed control section 71 receives the voltage signal S3 of voltage transformer 3 outputs.Closed control section 71 receives the voltage signal S4 of voltage transformer 4 outputs.Closed control section 71 is based on status signal S61 and voltage signal S3 and S4 and to closing coil 63 output closure signal SC.
The closed status signal S61 that confirms part 76 accepting state test sections, 61 outputs.Closed affirmation part 76 confirms that based on this status signal S61 described switch sections 60 is closed.Confirming described switch sections 60 after the closure, closedly confirming that part 76 output frequency reset signal S76 give judgment part 75.
The current signal S62 of fault detection part 73 received current instrument transformers 62 outputs.Fault detection part 73 is based on the fault on the described current signal S62 detection distribution line 1.When detecting fault, fault detection part 73 output fault detection signal S73 give judgment part 75.
Be provided with in the part 78 to be provided with at tolerance frequency and allow number of times 79.This allows the number of times of allowing of fault that number of times 79 expression is detected by fault detection part 73.This tolerance frequency is provided with part 78 output and allows that number of times 79 gives judgment part 75 as tolerance frequency signal S78.
Fig. 2 shows the block diagram according to the structure of the judgment part 75 of this embodiment.
Failure-frequency calculating section 751 receives the fault detection signal S73 of fault detection part 73 outputs.Failure-frequency calculating section 751 receives the closed frequency reset signal S76 that confirms part 76 outputs.Failure-frequency calculating section 751 calculates the number of times of fault based on this fault detection signal S73 and frequency reset signal S76.Failure-frequency calculating section 751 blocks part 752 to closure the number of stoppages that calculates is provided.
Closed blockade part 752 is obtained the information of the number of stoppages from failure-frequency calculating section 751.The closed part 752 of blocking receives the tolerance frequency signal S78 that tolerance frequency is provided with part 78 outputs.The closed part 752 of blocking compares this number of stoppages and the number of times of allowing that is included among the tolerance frequency signal S78 to judge whether that blockade is by closed control section 71 closed described switch sections 60.When judging will block closure the time, the closed closed locking signal S75 of part 752 outputs that blocks gives closed control section 71.Closed locking signal S75 blocks the closure signal SC of closed control section 71 outputs.
Based on the fault detection signal S73 of fault detection part 73 outputs, open part of O P output opening signal ST to opening coil 64.
Fig. 3 shows the block diagram according to the function of the switchgear of first embodiment.
In fault detection part 73, set in advance the sensitivity that is used for detection failure.The same sensitivity that in transformer station, is provided for detection failure.Sensitivity in the fault detection part 73 is arranged to equal substantially the level of sensitivity that in transformer station, is provided with.This transformer station will for example be used to connect distribution line 1 and put in control with the circuit breaker of up-stream system.Fault detection part 73 detects the current value of the electric current of the distribution line 1 of flowing through based on current signal S62.When this current value surpassed this sensitivity, fault detection part 73 detected distribution line 1 and has fault.
Behind the fault detection signal S73 that receives from fault detection part 73, open part of O P output opening signal ST to opening coil 64.As a result, open part of O P and open switch sections 60.
Counter CN stores the number of times 7C of detected fault.After receiving fault detection signal S73, counter CN makes the number of times 7C of detected fault add 1.As a result, counter CN calculates the number of times of fault.When counter CN received frequency reset signal S76, its number of times 7C with detected fault reset to " 0 ".
When the number of times 7C of detected fault when allowing number of times 79, the closed locking signal S75 of rating unit CMP is set to " 1 " and this signal is exported to closed control section 71.Rating unit CMP blocks the described switch sections 60 of closure by exporting closed locking signal S75.
Whether voltage level judging unit 31 is applied to voltage based on voltage signal S3 on the supply side H of distribution line 1 is detected.When voltage level judging unit 31 detects when applying voltage its output " 1 ".When definite testing result when not applying voltage, 31 outputs " 0 " of voltage level judging unit.Voltage level judging unit 31 output testing results are given and door 92A.
Whether voltage level judging unit 41 is applied to voltage based on voltage signal S4 on the load-side L of distribution line 1 is detected.When voltage level judging unit 41 detects when applying voltage its output " 1 ".When definite testing result when not applying voltage, 41 outputs " 0 " of voltage level judging unit.Voltage level judging unit 41 is given and door 92A by not gate 91A output testing result.
With the testing result of door 92A reception from voltage level judging unit 31.Receive testing result with door 92A via not gate 91A from voltage level judging unit 41.When voltage is applied to the supply side of distribution line 1 and voltage and is not applied to the load-side L of distribution line 1, with door 92A output " 1 ".In other cases, with door 92A output " 0 ".Give and door 92B with door 92A output arithmetic operation results.
With door 92B via not gate 91B accepting state signal S61.Receive closed locking signal S75 with door 92B via not gate 91C.With door 92B receive from the arithmetic operation results of door 92A.
Logical produc with door 92B generation input signal.Give timer TA with door 92B output arithmetic operation results.When voltage only is applied to the supply side H of distribution line 1, switch sections 60 is opened, and judgment part 75 output expressions are not when blocking closed closed locking signal S75, with door 92B output " 1 ".Under other any situation, with door 92B output " 0 ".Give timer TA with door 92B output arithmetic operation results.
Time
ASet in advance in timer TA.Should the time
ABe provided with longlyer than the detection time that in transformer station, is provided with.Time
AIt for example is 2 seconds.When from door 92B input " 1 " duration
AThe time, timer TA output closure signal SC give closing coil 63.
Now, with reference to Figure 16 and Fig. 4 the operation of introducing in the distribution system according to each switchgear 21-25 of present embodiment is described.
Figure 16 shows the electric power system figure of the position of each switchgear 21-25.Circuit breaker CB and switchgear 21-25 are included in this distribution system.
Fig. 4 shows the time diagram according to the operation of each switchgear 21-25 of present embodiment.Time diagram (a) shows the operation of circuit breaker CB.Time diagram (b), (c), (d), (e) and (f) show the operation of switchgear 21,24,22,25 and 23 respectively.At time diagram (a) and (b), (c), (d), (e) with (f), state " 0 " expression open mode, and state " 1 " expression closure state.The form of lower part shows the conversion of the detected number of stoppages in each switchgear 21-25.
In switchgear 21-25, will allow number of times 79 to be set to " 1 ".
Now, assumed fault FT occurs among the part 1D.Fault FT for example is a short trouble.
When fault FT took place, circuit breaker CB was based on from the order of transformer station and open.
Switchgear 21-23 detects fault FT respectively, and opens its switch.Circuit breaker CB and switchgear 21-23 opened in the roughly the same moment.The number of times 7C of the fault that each count detection among the switchgear 21-23 arrives, and it is set to " 1 ".
Because fault current does not flow through switchgear 24-25, so these equipment do not detect fault FT.Therefore, switchgear 24 and 25 remains on closure state.In in switchgear 24 and 25 each, the number of times 7C of detected fault is " 0 ".
When circuit breaker CB opened, fault current no longer flow through distribution line 1.When fault current did not flow through distribution line 1, circuit breaker CB was closed once more immediately.When circuit breaker CB was closed once more, part 1A was recharged.
Elapsed time after part 1A is recharged
AThe time, switchgear 21 closures.When switchgear 21 closures, part 1B is recharged.At this moment, because switchgear 24 remains on closure state, so part 1E is charged simultaneously.When after the closure during elapsed time B, switchgear 21 resets to " 0 " with the number of times 7C of detected fault.
Elapsed time after part 1B is recharged
AThe time, switchgear 22 closures.When switchgear 22 closures, part 1C is recharged.At this moment, because switchgear 25 remains on closure state, so part 1F is recharged.When after the closure during elapsed time B, switchgear 22 resets to " 0 " with the number of times 7C of detected fault.
Elapsed time after part 1C is recharged
AThe time, switchgear 23 closures.When switchgear 23 closures, part 1D is recharged.Yet fault FT persists among the part 1D.Therefore, circuit breaker CB opens once more.In addition, fault current flows through switchgear 21-23.Therefore, switchgear 21-23 is opened once more by detection failure FT.The number of times 7C of the fault that each switchgear 21-23 count detection arrives.In in switchgear 21-22 each, the number of times 7C of detected fault becomes " 1 ".In switchgear 23, the number of times 7C of detected fault becomes " 2 ".In switchgear 23, the number of times 7C of detected fault surpasses " 1 ", promptly surpasses and allows number of times 79.Therefore, the closed locking signal S75 of judgment part 75 outputs of switchgear 23.
Then, similarly, circuit breaker CB is closed once more.When circuit breaker CB was closed once more, various piece 21,22,24 and 25 was recharged.Yet because closed locking signal S75 does not indicate blockade, so switchgear 23 does not have closure.Therefore, only faulty component 1D and distribution line 1 disconnect on electric.
According to present embodiment, can obtain following function/effect.
Each switchgear 6 that is arranged in the distribution system comes detection failure by the flow through electric current of distribution line 1 of use.Therefore, each switchgear 6 can be closed once more, and needn't wait for the decay of the residual voltage in the distribution line 1.Correspondingly, be arranged on the circuit breaker CB quick-make once more of the up-stream system side of distribution line 1.In addition, if the time
ABe equal to, or greater than the recovery time of detection failure, the timer TA of then closed control section 71 can shorten the time
A
The switchgear that the fault-free electric current flows through is kept closed.Therefore, in the part of the down-stream system that places these switchgears, can shorten the needed time of power recovery.And, even be when being connected in parallel at switchgear, also can be with the identical time
ASet the timer TA that gives all switchgears.Therefore, can shorten the power recovery time of all parts in the distribution system.
In the switchgear at the place, end that is arranged on distribution line 1, can will allow that number of times 79 is set to " 0 ".As a result, for the caused fault of part by place, the end of distribution line 1, faulty component can once disconnect by close circuit breaker CB once more.
[second embodiment]
Fig. 5 shows the block diagram according to the structure of the switchgear of second embodiment of the invention.Similar Reference numeral is represented the part identical with Fig. 1, thereby omits detailed description thereof, will only introduce different parts here.Should be noted that in the following embodiments, also with the repetitive description thereof will be omitted.
Switchgear according to present embodiment comprises switch 6A and controller 7.Be the contact 65 that switch 6A has auxiliary relay 66 and operates according to this auxiliary relay 66 with switch 6 differences according to first embodiment.
Fig. 6 shows the block diagram according to the function of the switchgear of second embodiment.
When the electric current of the distribution line 1 of flowing through during greater than the switch allowable current, auxiliary relay 66 work among the switch 6A.Under the situation of auxiliary relay 66 work, open contact 65.As a result, the opening signal ST that prevents controller 7 output is input to and opens coil 64.
When the electric current of the distribution line 1 of flowing through was equal to or less than the switch allowable current, the auxiliary relay 66 among the switch 6A recovered.When auxiliary relay 66 recovers, contact 65 closures.As a result, the opening signal ST that is prevented from is input to and opens coil 64.
In the switchgear according to present embodiment, others are with identical according to the switchgear of first embodiment.
Now, with the operation of explanation according to the switchgear of present embodiment.
When fault current was flowed through distribution line 1, switchgear detected fault.After detecting fault, controller 7 output opening signal ST are to open switch 6A.At this moment, auxiliary relay 66 is operated based on the fault current that flows through distribution line 1.As a result, avoid opening signal ST is input to and open coil 64.Therefore, switch 6A does not open.
When circuit breaker CB opened, fault current interrupted.As a result, fault current no longer is present in the distribution line 1.When fault current was not flowed through distribution line 1, auxiliary relay 66 recovered.When detecting fault, the opening signal ST of controller 7 outputs keeps output.Opening signal ST is input to and opens coil 64.Therefore, switch 6A opens.
Utilize this mode, when the electric current that is equal to, or greater than the switch allowable current was flowed through distribution line 1, switch 6A can not open.
The operation of each switchgear that is applied in distribution system is identical with the operation of first embodiment.
According to present embodiment, can obtain following function/effect.
When the fault current of the distribution line 1 of flowing through during greater than the switch allowable current, switchgear is not opened.When fault current became less than the switch allowable current, switchgear was opened immediately.The result.Switchgear can be safely, open reliably.In addition, as each switchgear that offers distribution line 1, can use the switchgear (for example, load switch) that has than the P cock allowable current.
In addition, can obtain and first embodiment identical functions/effect.
[the 3rd embodiment]
Fig. 7 shows the block diagram according to the structure of the switchgear of third embodiment of the invention.
Switchgear according to this embodiment comprises switch 6B and controller 7B.
Fig. 9 shows the block diagram according to the function of the switchgear of the 3rd embodiment.
Different with the controller 7 according to first embodiment, controller 7B has closed control section 71B, to replace closed control section 71; Judgment part 75B is to replace judgment part 75; Auxiliary relay 81; And contact 82, operate according to auxiliary relay 81 this contact 82.
Be with difference according to the closed control section 71 of first embodiment, that this closure control section 71B has an interpolation or door 93A, 93B and with door 92C.Each or door 93A, 93B be produce input signal logic and circuit.With door 92C be the circuit that produces the logical produc of input signal.
Or door 93A receives the testing result from voltage level judging unit 31.Or door 93A receives the testing result from voltage level judging unit 41.Or door 93A output function result gives and door 92C.
With door 92C receive from or the operating result of door 93A.With the status signal S61 of door 92C reception from state-detection part 61.Give or door 93B with door 92C output function result.
Or door 93B receive from the operating result of door 92C.Or door 93B receives the output signal of self-timer TA.Or door 93B output function result is as closure signal SC1.
When carrying out one of at least in voltage level judging unit 31 and the voltage level judging unit 41 detected and switch 6B when being in closure state closed control section 71B output closure signal SC1.In addition, exporting under the same terms of closure signal SC closed control section 71B output closure signal SC1 with closed control section 71 according to first embodiment.
Fig. 8 shows the block diagram according to the structure of the judgment part 75B of the 3rd embodiment.
As shown in Figure 7, auxiliary relay 81 is by the opening signal ST1 excitation of judgment part 75B output.The result.Auxiliary relay 81 operations.Contact 82 responds the operation of auxiliary relays 81 and opens.
Utilize this mode, controller 7B carries out the control that is adapted to as the described switch 6B of contact stimulable type switch.
In the switchgear according to present embodiment, others are with identical according to the switchgear of first embodiment.
Now, with the operation of explanation according to the switchgear of present embodiment.
When breaking down in the distribution line 1, judgment part 75B output opening signal ST1.Auxiliary relay 81 is operated in response to this opening signal ST1.Contact 82 is based on the operation of auxiliary relay 81 and open.When open contact 82, closure signal ST1 is input to closing coil 63A interrupts.Therefore, switch 6B opens.
When fault current was not flowed through distribution line 1, auxiliary relay 81 recovered.Be recharged the back time in the past at distribution line 1
AThe time, closed control section 71B output closure signal ST1.Switch 6B is based on described closure signal ST1 closure.When switch 6B was closed, closed control section 71B kept output closure signal SC1, simultaneously being recharged one of at least among the supply side H of distribution line 1 and the load-side L.As a result, switch 6B is kept closed.
The operation that should be noted that each switchgear that is applied to distribution system is identical with the operation of first embodiment.
According to present embodiment, can dispose and to obtain the constant excitation type switchgear identical with function/effect of first embodiment.
[the 4th embodiment]
Figure 10 shows the block diagram according to the structure of the switchgear of fourth embodiment of the invention.
Switchgear according to this embodiment comprises switch 6C and controller 7C.
Be that with switch 6B difference auxiliary current transformer 67 summation current transformers that switch 6C has interpolation pile up (stack) 68 according to the 3rd embodiment.
Electric current among the current signal S62 of auxiliary current transformer 67 received current instrument transformers 62 outputs.Auxiliary current transformer 67 is exported to current transformer with the electric current that is received as closure signal SC2 and is piled up 68.When the electric current greater than the switch allowable current flow through distribution line 1, auxiliary current transformer 67 output closure signal SC2 were to keep the closure state of switch 6C.
Current transformer pile up 68 in the future the closure signal SC1 of self-controller 7C make up to generate closure signal SC3 with closure signal SC2 from auxiliary current transformer 67.The closure signal SC3 that current transformer piles up 68 output combinations gives closing coil 63A.
Figure 11 shows the block diagram according to the function of the switchgear of the 4th embodiment.
This closure control section 71C has following array structure, wherein, remove with door 92C and or door 93A, 93B, and in according to the closed control section 71B of the 3rd embodiment, add not gate 91D, with door 92D and latch circuit 94.Not gate 91D is the circuit that input signal is negated.With door 92D be the circuit that produces the logical produc of input signal.When signal was input to SET, latch circuit 94 kept output.When signal was input to RESET, latch circuit stopped output.
Receive testing result with door 92D via not gate 91D from voltage level judging unit 31.Receive testing result with door 92D via not gate 91A from voltage level judging unit 41.Provide the RESET of the operating result of input signal with door 92D to latch circuit 94.
In latch circuit 94, be provided for SET from signal with door 92B.In latch circuit 94, be provided for RESET from signal with door 92D.Latch circuit 94 outputs signal to timer TA.
Utilize this mode, controller 7C realizes and controller 7B identical functions according to the 3rd embodiment.
In the switchgear according to present embodiment, others are with identical according to the switchgear of the 3rd embodiment.
Now, with the function of introducing according to the switchgear of present embodiment.
When fault current was flowed through distribution line 1, switchgear detected fault.When detecting fault, ST1 is to open switch 6C for controller 7C output opening signal.The closure signal SC1 that closed control section 71C is exported is interrupted by opening signal ST1.At this moment, auxiliary current transformer 67 is by the flow through fault current output closure signal of distribution line 1 of use.Therefore, switch 6C does not open.
When circuit breaker CB opened, fault current interrupted.As a result, fault current no longer is present on the distribution line 1.When fault current was not flowed through distribution line 1, auxiliary current transformer 67 was no longer exported closure signal SC2.Therefore, switch 6C opens.
The operation that should be noted in the discussion above that each switchgear that is applied to distribution system is identical with first embodiment.
According to present embodiment, can dispose the constant excitation type switchgear that can obtain with second embodiment identical functions/effect.
[the 5th embodiment]
Figure 12 shows the block diagram according to the structure of the switchgear of fifth embodiment of the invention.
Switchgear according to present embodiment comprises switch 6 and controller 7D.Controller 7D has following array structure, and wherein closed affirmation part 76D replaces according to the closure in the controller 7 of first embodiment and confirms part 76, and judgment part 75D replaces according to the judgment part 75 in the controller 7 of first embodiment.Closed affirmation part 76D output opening signal ST.
Figure 13 shows the block diagram according to the structure of the judgment part 75D of the 5th embodiment.
Be configured to receive self-closing to block the closed locking signal S75 of part 752A with opening part of O P2, to replace receiving the fault detection signal S73 that opens among the part of O P.
Figure 14 shows the block diagram according to the function of the switchgear of the 5th embodiment.
The closed structure of confirming that part 76D has be confirm to have increased in the part 76 according to the closure of first embodiment voltage level judging unit 31A and 41A, not gate 91E and 91F, with door 92E and timer TC.Each not gate 91E and 91F are the circuit that input signal is negated.With door 92E be the circuit that produces the logical produc of input signal.
Whether voltage level judging unit 31A is applied to voltage based on voltage signal S3 on the supply side H of distribution line 1 is detected.When detecting when applying voltage, voltage level judging unit 31A exports " 1 ".When definite testing result when not applying voltage, voltage level judging unit 31A exports " 0 ".Voltage level judging unit 31A exports to testing result and door 92E by not gate 91E.
Whether voltage level judging unit 41A is applied to voltage based on voltage signal S4 on the load-side L of distribution line 1 is detected.When voltage level judging unit 41A detects when applying voltage its output " 1 ".When definite testing result when not applying voltage, voltage level judging unit 41A exports " 0 ".Voltage level judging unit 41A exports to testing result and door 92E by not gate 91F.
With door 92E accepting state signal S61.Pass through the testing result of not gate 91E reception with door 92E from voltage level judging unit 31A.Receive testing result with door 92E via not gate 91F from voltage level judging unit 41A.Give timer TC with door 92E output function result.
Time C sets in advance in timer TC.Time C is based on the distribution line 1 quantity of the switchgear that is provided with and definite time.When from the time with door 92E input " 1 " duration C, timer TC output opening signal ST.Timer TC exports to this opening signal ST or door 93C.
Based on this structure, when voltage does not impose on the supply side of distribution line 1 and load-side and switch 6 when being in closure state, closedly confirm that part 76D exports opening signal ST after elapsed time C.
Rating unit CMP1 exports closed locking signal S75 under the condition identical with rating unit CMP.Rating unit CMP1 also exports to described closed locking signal S75 and opens part of O P2.
Behind the closed locking signal S75 that has received from rating unit CMP1, open part of O P2 output opening signal ST and give or door 93C.
When or door 93C when receiving self-timer TC and opening at least one opening signal ST among the part of O P2, its output opening signal ST gives and opens coil 64.
The operation of introducing in the distribution system to be introduced with reference to Figure 17 and Figure 15 below according to each switchgear 21-25 of present embodiment.
Figure 17 shows the electric power system figure of the position of each switchgear 21 to 25.In distribution system, comprise circuit breaker CB and switchgear 21 to 25.
Figure 15 shows the time diagram according to the operation of each switchgear 21 to 25 of this embodiment.Timetable (a) shows the work of circuit breaker CB.Timetable (b), (c), (d), (e) and (f) show the work of switchgear 21,24,22,25 and 23 respectively.At timetable (a) and (b), (c), (d), (e) with (f), state " 0 " expression open mode, state " 1 " expression closure state.Following form shows the number of times 7C of the detected fault in each switchgear 21 to 25.
According to the order that the end side L from distribution line 1 begins to rise, in each switchgear 21-25, be provided with and allow number of times.In each switchgear in switchgear 23 to 25, will allow that number of times 79 is set to " 0 ".In switchgear 22, will allow that number of times 79 is set to " 1 ".In switchgear 21, will allow that number of times 79 is set to " 2 ".
Now, assumed fault FT1 occurs among the part 1C.Fault FT1 for example is a short trouble.
When breaking down FT1, circuit breaker CB is in response to from the order of transformer station and open.
The switchgear 23 to 25 because fault current is not flowed through is not so these equipment detect fault FT.In in switchgear 23 to 25 each, the number of times of detected fault is " 0 ".
Because the number of times 7C of detected fault does not surpass and allows number of times 79 in each switchgear 21 to 25, so these switchgears 21 remain on closure state to 25.
When circuit breaker CB opens, on distribution line 1, no longer include fault current.When fault current was not flowed through distribution line 1, circuit breaker CB was closed once more immediately.When circuit breaker CB was closed once more, distribution line 1 was recharged.Yet in part 1C, fault FT1 exists.Therefore, circuit breaker CB opens once more.Each switchgear 21 and 22 detects fault FT1 and opens.In each switchgear 21 and 22, the number of times 7C of detected fault is " 2 ".Here, in switchgear 22, the number of times 7C of detected fault has surpassed and has allowed number of times 79.Therefore, the judgment part 75D in the switchgear 22 exports closed locking signal S75.In other each switchgear 21,23,24 and 25, because surpassing, the number of times 7C of detected fault do not allow number of times 79, so these switchgears 21,23,24 and 25 remain on closure state.
Circuit breaker CB is closed once more.When circuit breaker CB was closed once more, normal part 1A, 1B and the 1E of distribution line 1 were recharged.
After closure was confirmed part 76D gate time C, each switchgear 23 and 25 that is arranged on the load-side L of faulty component 1C was opened.As a result, have only faulty component 1C and distribution line 1 on electric, to disconnect.
According to this embodiment, can obtain following function/effect.
Wherein there is not the switchgear that fault current flows through to be kept closed.Therefore, these switchgears needn't be closed once more.Therefore, in the part of the down-stream system that places these switchgears, can shorten the required time of power recovery.
In the switchgear of the end that is arranged on distribution line 1, can will allow that number of times 79 is set to " 0 ".As a result, for the fault in the part of the end of distribution line 1, when circuit breaker CB is closed again, can the open failure part.
Under situation about recovering from fault, when the up-stream system of distribution line 1 was recharged, each switchgear that is arranged on the distribution line 1 can auto-closing.
It should be noted, be provided with auxiliary relay 66 and contact 65 among the switch 6A in a second embodiment, but they also can be arranged in as shown in figure 18 the controller 7.In this case, the auxiliary relay 66 of setting is based on that the current signal S62 of current transformer 62 output is energized.In addition, provide contact 65 to open path, described opening signal ST is by this path output.As a result, switchgear can obtain and be provided with example identical functions/effect of switch 6A.
Those skilled in the art expect other advantage and modification easily.Therefore, in a broad sense, the invention is not restricted to the detail and the exemplary embodiment that illustrate and describe herein.Therefore, under the situation of the spirit or scope that do not break away from the general inventive concept that limits by claims and equivalent thereof, can carry out various modifications.
Claims (10)
1. on-off controller (7) that is used to be arranged on the switch (6) on the distribution line (1), described switch (6) comprises state-detection part (61), it detects the open mode of representing described switch (6) or the status signal (S61) of closure state, described distribution line (1) comprises current sensing means (62), and it is used for detecting the electric current of described switch (6) of flowing through; And supply side voltage check device (3), it is used to detect the voltage on the supply side of described switch (6), and described on-off controller (7) is characterised in that and comprises:
Failure judgment device (73), it is used for judging whether to have taken place fault based on the electric current that described current sensing means (62) is detected;
First device for opening (OP), it is used for judging the time output of breaking down at described failure judgment device (73) and is used to open the opening signal (ST) of described switch (6);
Failure-frequency calculation element (751), it is used for calculating the number of stoppages based on the result that described failure judgment device (73) is judged;
Closed sealing pack (752), it is used for the number of stoppages that calculates at described failure-frequency calculation element (751) greater than predetermined closure of blocking described switch (6) when allowing number of times;
Supply side voltage judgment means (31), it is used for judging based on the detected voltage of described supply side voltage check device (3) whether voltage is applied in to the described supply side of described switch (6);
Closing device (71), it is used for judging that in closure, described supply side voltage judgment means (31) that described closed sealing pack (752) does not block described switch (6) voltage is applied in to when the described supply side of described switch (6) and the described open mode of described state-detection part (61) detected status signal (S61) expression, in first closure signal (SC) that is used for closed described switch through output after the scheduled time;
Closed affirmation device (76), whether it is used for based on confirm described switch (6) from the status signal (S61) of described state-detection part (61) closed; And
The failure-frequency resetting means, it is used for resetting at the described closed number of stoppages (7C) of confirming that device (76) confirms that described switch (6) when closed is calculated described failure-frequency calculation element (751).
2. on-off controller according to claim 1 (7) is characterized in that also comprising:
Open inhibiting apparatus (65,66), it is used at the electric current of the described switch (6) of flowing through during greater than the switch allowable current of described switch (6), based on forbidden the described opening signal of output from described first device for opening (OP) output by the detected electric current of described current sensing means (62).
3. switchgear, comprise on-off controller (7) and switch (6), described switch (6) is arranged on the distribution line (1) and comprises state-detection part (61), it detects the open mode of representing described switch (6) or the status signal (S61) of closure state, described switch (6) also comprises current sensing means (62), and it is used for detecting the electric current of described switch (6) of flowing through; And supply side voltage check device (3), it is used to detect the voltage on the supply side of described switch (6),
Described on-off controller (7) is characterised in that and comprises:
Failure judgment device (73), it is used for judging whether to have taken place fault based on the electric current that described current sensing means (62) is detected;
First device for opening (OP), it is used for judging the time output of breaking down at described failure judgment device (73) and is used to open the opening signal (ST) of described switch (6); Failure-frequency calculation element (751), it is used for calculating the number of stoppages based on the result that described failure judgment device (73) is judged;
Closed sealing pack (752), it is used for the number of stoppages that calculated at described failure-frequency calculation element (751) greater than predetermined closure of blocking described switch (6) when allowing number of times;
Supply side voltage judgment means (31), it is used for judging based on the detected voltage of described supply side voltage check device (3) whether voltage is applied in to the described supply side of described switch (6);
Closing device (71), it is used for judging that in closure, described supply side voltage judgment means (31) that described closed sealing pack (752) does not block described switch (6) voltage is applied in to when the described supply side of described switch (6) and the described open mode of described state-detection part (61) detected status signal (S61) expression, in first closure signal (SC) that is used for closed described switch through output after the scheduled time;
Closed affirmation device (76), whether it is used for based on confirm described switch (6) from the status signal (S61) of described state-detection part (61) closed; And
The failure-frequency resetting means, it is used for resetting at the described closed number of stoppages (7C) of confirming that device (76) confirms that described switch (6) when closed is calculated described failure-frequency calculation element (751), and
Described switch (6) is kept closed when receiving described first closure signal, and stays open state when receiving described opening signal.
4. switchgear according to claim 3 is characterized in that described switch (6) comprising:
Open inhibiting apparatus (65,66), it is used at the described electric current of the described switch (6) of flowing through during greater than the switch allowable current of described switch (6), based on being forbidden by the detected electric current of described current sensing means (62) from the described opening signal (ST) of described first device for opening (OP) output.
5. switchgear according to claim 3 is characterized in that also comprising:
Load side voltage checkout gear (4), it is used to detect the voltage of the load-side of described switch (6);
Load side voltage judgment means (41), it is used for judging based on the voltage that described load side voltage checkout gear (4) is detected whether voltage is applied in to the described load-side of described switch (6); And
Second device for opening (OP2), it is used for opening described switch (6) through after the scheduled time when described supply side voltage judgment means (31) is judged voltage and is not applied in described supply side, described load side voltage judgment means (41) to described switch (6) and judges voltage and be not applied in to the described load-side of described switch (6) and described state-detection part (61) detected status signal (S61) expression closed procedure.
6. switchgear according to claim 4 is characterized in that also comprising:
Load side voltage checkout gear (4), it is used to detect the voltage of the load-side of described switch (6);
Load side voltage judgment means (41), it is used for judging based on the voltage that described load side voltage checkout gear (4) is detected whether voltage is applied in to the described load-side of described switch (6); And
Second device for opening (OP2), it is used for opening described switch (6) through after the scheduled time when described supply side voltage judgment means (31) is judged voltage and is not applied in described supply side, described load side voltage judgment means (41) to described switch (6) and judges voltage and be not applied in to the described load-side of described switch (6) and described state-detection part (61) detected status signal (S61) expression closed procedure.
7. switchgear, comprise on-off controller (7) and switch (6), described switch (6) is arranged on the distribution line (1) and comprises state-detection part (61), it detects the open mode of representing described switch (6) or the status signal (S61) of closure state, described switch (6) also comprises current sensing means (62), and it is used for detecting the electric current of described switch (6) of flowing through; And supply side voltage check device (3), it is used to detect the voltage on the supply side of described switch (6),
Described on-off controller (7) is characterised in that and comprises:
Failure judgment device (73), it is used for judging whether to have taken place fault based on the electric current that described current sensing means (62) is detected;
First device for opening (OP), it is used for judging the time output of breaking down at described failure judgment device (73) and is used to open the opening signal (ST1) of described switch (6); Failure-frequency calculation element (751), it is used for calculating the number of stoppages based on the result that described failure judgment device (73) is judged;
Closed sealing pack (752), it is used for the number of stoppages that calculated at described failure-frequency calculation element (751) greater than predetermined closure of blocking described switch (6) when allowing number of times;
Supply side voltage judgment means (31), it is used for judging based on the detected voltage of described supply side voltage check device (3) whether voltage is applied in to the described supply side of described switch (6);
Closing device (71), it is used for judging that in closure, described supply side voltage judgment means (31) that described closed sealing pack (752) does not block described switch (6) voltage is applied in to when the described supply side of described switch (6) and the described open mode of described state-detection part (61) detected status signal (S61) expression, in first closure signal (SC1) that is used for closed described switch through output after the scheduled time;
Closed affirmation device (76), whether it is used for based on confirm described switch (6) from the status signal (S61) of described state-detection part (61) closed; And
The failure-frequency resetting means, it is used for resetting at the described closed number of stoppages (7C) of confirming that device (76) confirms that this switch (6) when closed is calculated described failure-frequency calculation element (751), and
Described switch (6) enters closure state when receiving described first closure signal (SC1), and enters open mode when not receiving described first closure signal (SC1), and
Described first device for opening (OP) is exported described opening signal (ST1) to interrupt outputing to from described closing device (71) path of described first closure signal (SC1) of described switch (6).
8. switchgear according to claim 7 is characterized in that described switch (6) comprising:
Open inhibiting apparatus (67), it is used at the electric current of the described switch (6) of flowing through during greater than the switch allowable current of described switch (6), based on exported second closure signal (SC2) that is used for closed described switch (6) by the detected electric current of described current sensing means (62).
9. switchgear according to claim 7 is characterized in that also comprising:
Load side voltage checkout gear (4), it is used to detect the voltage of the load-side of described switch (6);
Load side voltage judgment means (41), it is used for judging based on the voltage that described load side voltage checkout gear (4) is detected whether voltage is applied in to the described load-side of described switch (6); And
Second device for opening (OP2), it is used for opening described switch (6) through after the scheduled time when described supply side voltage judgment means (31) is judged voltage and is not applied in described supply side, described load side voltage judgment means (41) to described switch (6) and judges voltage and be not applied in to the described load-side of described switch (6) and described state-detection part (61) detected status signal (S61) expression closed procedure.
10. switchgear according to claim 8 is characterized in that also comprising:
Load side voltage checkout gear (4), it is used to detect the voltage of the load-side of described switch (6);
Load side voltage judgment means (41), it is used for judging based on the voltage that described load side voltage checkout gear (4) is detected whether voltage is applied in to the described load-side of described switch (6); And
Second device for opening (OP2), it is used for opening described switch (6) through after the scheduled time when described supply side voltage judgment means (31) is judged voltage and is not applied in described supply side, described load side voltage judgment means (41) to described switch (6) and judges voltage and be not applied in to the described load-side of described switch (6) and described state-detection part (61) detected status signal (S61) expression closed procedure.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP249904/2006 | 2006-09-14 | ||
| JP2006249904A JP2008072852A (en) | 2006-09-14 | 2006-09-14 | Switch controller, and switchgear |
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| CN101145682A CN101145682A (en) | 2008-03-19 |
| CN101145682B true CN101145682B (en) | 2010-06-09 |
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| CN2007101547612A Active CN101145682B (en) | 2006-09-14 | 2007-09-13 | Switch controller and switch device |
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| CN (1) | CN101145682B (en) |
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| JP6517589B2 (en) * | 2015-05-29 | 2019-05-22 | 株式会社東芝 | DC power transmission system, central server thereof, and method for recovering DC power transmission path after accident |
| DE102016117821A1 (en) * | 2016-09-21 | 2018-03-22 | Pilz Gmbh & Co. Kg | Safety circuit for fail-safe disconnection of a hazardous technical system |
| CN106655101A (en) * | 2016-10-31 | 2017-05-10 | 广东美的制冷设备有限公司 | Household electrical appliance and over-current protection device and method of power factor corrector |
| CN106655102A (en) * | 2016-10-31 | 2017-05-10 | 广东美的制冷设备有限公司 | Power factor corrector over-current protection device and home appliance |
| CN107357209B (en) * | 2017-07-28 | 2019-06-18 | 湖北三江航天红峰控制有限公司 | Distribution self-sustaining control system on a kind of bullet based on solid-state relay |
| CN112019131A (en) * | 2020-08-10 | 2020-12-01 | 深圳市杉川机器人有限公司 | Motor rotation speed-based protection method and device, sweeper and computer medium |
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| CN1257334A (en) * | 1999-12-16 | 2000-06-21 | 常熟开关厂 | Intelligent controller for communicable plastics casing circuit breaker |
| CN1307387A (en) * | 2000-02-01 | 2001-08-08 | 阿尔斯通公司 | Improvement of electric protection and control system |
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| JPS607887B2 (en) * | 1977-11-18 | 1985-02-27 | 株式会社東芝 | switchgear |
| JPS63124720A (en) * | 1986-11-14 | 1988-05-28 | 株式会社 三英社製作所 | Failure locator for distribution line |
| JP2592815B2 (en) * | 1986-12-05 | 1997-03-19 | エナジーサポート株式会社 | High voltage load switch |
| JPH01264534A (en) * | 1988-04-11 | 1989-10-20 | Toshiba Corp | Accident detector |
| JPH0767236B2 (en) * | 1988-12-23 | 1995-07-19 | 株式会社日立製作所 | Distribution line protection device |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN1257334A (en) * | 1999-12-16 | 2000-06-21 | 常熟开关厂 | Intelligent controller for communicable plastics casing circuit breaker |
| CN1307387A (en) * | 2000-02-01 | 2001-08-08 | 阿尔斯通公司 | Improvement of electric protection and control system |
| CN2631087Y (en) * | 2003-06-25 | 2004-08-04 | 北京顺城电子技术公司 | Digital comprehensive protection monitor for feed switch |
| CN2717084Y (en) * | 2004-05-20 | 2005-08-10 | 江苏东源电器集团股份有限公司 | Intelligent control and protection arrangement for high voltage vacuum circuit breaker |
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| CN101145682A (en) | 2008-03-19 |
| JP2008072852A (en) | 2008-03-27 |
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