CN110474288A - Programmable microcomputer protecting device - Google Patents
Programmable microcomputer protecting device Download PDFInfo
- Publication number
- CN110474288A CN110474288A CN201910826957.4A CN201910826957A CN110474288A CN 110474288 A CN110474288 A CN 110474288A CN 201910826957 A CN201910826957 A CN 201910826957A CN 110474288 A CN110474288 A CN 110474288A
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- Prior art keywords
- protection
- terminal contact
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- closing
- sustaining
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Classifications
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
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- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/05—Details with means for increasing reliability, e.g. redundancy arrangements
-
- H—ELECTRICITY
- H02—GENERATION; CONVERSION OR DISTRIBUTION OF ELECTRIC POWER
- H02H—EMERGENCY PROTECTIVE CIRCUIT ARRANGEMENTS
- H02H3/00—Emergency protective circuit arrangements for automatic disconnection directly responsive to an undesired change from normal electric working condition with or without subsequent reconnection ; integrated protection
- H02H3/02—Details
- H02H3/06—Details with automatic reconnection
- H02H3/066—Reconnection being a consequence of eliminating the fault which caused disconnection
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- Emergency Protection Circuit Devices (AREA)
- Keying Circuit Devices (AREA)
Abstract
The application provides a kind of programmable microcomputer protecting device, and by being connected between shutting-brake control switch and closing circuit of circuit breaker into a closing protective locking outlet, and closing protective locking outlet includes first terminal contact and Second terminal contact；First terminal contact and shutting-brake control switch connect, and Second terminal contact is connect with closing circuit of circuit breaker；It is connected to disconnection when fault message is not eliminated between first terminal contact and Second terminal contact, restores connection when fault message is eliminated.This is allowed for when fault message is not eliminated, and shutting-brake control switchs transitory loss to the shutting-brake control ability of breaker；And after fault message elimination, shutting-brake control switchs corresponding switching signal when being operated can pass to breaker by closing circuit of circuit breaker, so that breaker closing.Which solves do not exclude in failure in the related technology, warning light non-involution in the case where, splitting or integrating lock causes equipment damage repeatedly, the problem of expanding accident.
Description
Technical field
This application involves distribution technique field is become, in particular to a kind of programmable microcomputer protecting device.
Background technique
In some enterprises, hyperbaric chamber is to be managed respectively by two different units with live high-tension apparatus, and big portion
What point hyperbaric chamber was carried out is unattended mode, and there are following situations under this operational mode: when motor needs start and stop, by giving birth to
It produces unit operation work and operates start-stop button in the field control case of motor to realize the divide-shut brake of high-voltage board.When event occurs for motor
Barrier, after the tripping lamp of high-voltage board, corresponding protection type lamp are lighted, switchgear operates switch knob again to operations staff at the scene
High-voltage board is tried to close a floodgate, can try to send several times when closing unsuccessful, causes the breaker not exclude in failure, the non-involution of warning light
In the case of, splitting or integrating lock causes equipment damage repeatedly, expands accident.
Summary of the invention
The embodiment of the present application is designed to provide a kind of programmable microcomputer protecting device, exists in the related technology to solve
The problem of failure does not exclude, in the case where the non-involution of warning light, and splitting or integrating lock causes equipment damage repeatedly, expands accident.
The embodiment of the present application provides a kind of programmable microcomputer protecting device, comprising: closing protective locking outlet, control of closing a floodgate
System switch and closing circuit of circuit breaker；Closing protective locking outlet is series at the shutting-brake control switch and breaker closing
Between circuit；Closing protective locking outlet includes first terminal contact and Second terminal contact；The first terminal contact
It switchs and connects with the shutting-brake control, the Second terminal contact is connect with the closing circuit of circuit breaker；The first terminal
Disconnection when fault message is not eliminated is connected between contact and the Second terminal contact；The first terminal contact with it is described
Being connected to when the fault message is eliminated between Second terminal contact restores connection.
During above-mentioned realization, closed a floodgate by connecting between shutting-brake control switch and closing circuit of circuit breaker into one
Protection blocking outlet, and closing protective locking outlet is configured as the first terminal contact when fault message is not eliminated in it
It is disconnected with Second terminal contact, the first terminal contact and Second terminal contact when fault message is eliminated in it restore to connect
It connects.This is allowed for when fault message is not eliminated, and shutting-brake control switch is separated with closing circuit of circuit breaker, so that control of closing a floodgate
System switchs corresponding switching signal when being operated can not also pass to breaker by closing circuit of circuit breaker, i.e., so that control of closing a floodgate
Shutting-brake control ability of the system switch transitory loss to breaker；And after fault message elimination, then first terminal contact and second
Terminal connections restore connection, and shutting-brake control switch is connected to again between closing circuit of circuit breaker, and shutting-brake control switch is operated
When corresponding switching signal breaker can be passed to by closing circuit of circuit breaker so that breaker closing.Which solves
Do not exclude in failure in the related technology, warning light non-involution in the case where, splitting or integrating lock causes equipment damage repeatedly, expands
The problem of accident.
Further, the closing protective locking outlet logic is connected with N number of self-sustaining element；The self-sustaining element is used
In entering self-sustaining state when the corresponding failure of the self-sustaining element occurs, disappear in the corresponding failure of the self-sustaining element
Except when exit the self-sustaining state；The N is the positive integer more than or equal to 1；Closing protective locking outlet is described N number of
When any one self-sustaining element in self-sustaining element is in self-sustaining state, the first terminal contact and Second terminal contact
It disconnects；When N number of self-sustaining element is not in self-sustaining state, the first terminal contact and Second terminal are connect
Point connection.
During above-mentioned realization, by being latched outlet logic in self-sustaining element, due to self-sustaining member with closing protective
Part can enter self-sustaining state when corresponding failure generates, and can then exit self-sustaining shape after corresponding failure is eliminated
State.Therefore the on-off control to the outlet of combined floodgate protection blocking can be realized in the state for passing through self-sustaining element.Letter is realized in control
It is single, high reliablity.
Further, the self-sustaining element includes at least one of:
Quick-break trip protection element；
Overcurrent tripping protection element；
Zero sequence trip protection element；
Inverse time current trip protection element；
Undervoltage tripping protection element；
Overload alerts protection element.
During above-mentioned realization, self-sustaining element includes quick-break trip protection element, overcurrent tripping protection element, zero sequence
Trip protection element, inverse time current trip protection element, undervoltage tripping protection element, overload alert in protection element
At least one, this allows for programmable microcomputer protecting device and is more easily implemented.
It further, further include pressing plate；The pressing plate is connected to the shutting-brake control switch and the breaker closing returns
Between road, and it is in parallel with closing protective locking outlet, for controlling first end described in closing protective locking outlet
The connection and disconnection of sub- contact and Second terminal contact.
During above-mentioned realization, is realized by a pressing plate in parallel and function is moved back to the manual throwing of combined floodgate protection blocking outlet
Can, further improve the reliability of closing protective locking outlet.
Further, the programmable microcomputer protecting device further includes separating brake protection exit and protection act element；It is described
Separating brake protection exit is connect with the protection act element, and the protection act element when receiving fault-signal for opening
It is dynamic, and trigger the separating brake protection exit movement.
During above-mentioned realization, programmable microcomputer protecting device further includes separating brake protection exit and protection act element,
Separating brake protection exit is connect with protection act element, and the starting when receiving fault-signal of protection act element, and is triggered and divided
The movement of lock protection exit, the movement of separating brake protection exit can control breaker open operation, to realize the separating brake to breaker
Control.
Further, the separating brake protection exit includes: fast tripping protection outlet；The protection act element is for receiving
When to fast tripping protection action message, start timing, and it is pre-designed constantly it is long reach when trigger the separating brake protection exit movement.
During above-mentioned realization, when separating brake protection exit includes fast tripping protection outlet, protection act element can be
Start timing when receiving fast tripping protection action message, and triggers the separating brake protection exit in pre-designed constantly long arrival and move
Make.In the embodiment of the present application, default timing duration can be set to match with the duration of reacting of breaker, to adapt to disconnected
The sensitivity of road device enables and controls breaker open operation in time in fault trip, prevents tripping, the extension of accident range.
Further, the separating brake protection exit includes: overcurrent and inverse time current protection outlet；The protection act member
Part is used for when receiving overcurrent protection action message and/or inverse time current protection action message, starts timing, and default
Timing duration triggers the separating brake protection exit movement when reaching.
During above-mentioned realization, when separating brake protection exit includes overcurrent and inverse time current protection exports, protection is dynamic
Timing can be started when receiving overcurrent protection action message and/or inverse time current protection action message by making element, and
The separating brake protection exit movement is triggered when pre-designed constantly long arrival.In the embodiment of the present application, default timing duration can be with
It is set as matching with the duration of reacting of breaker, to adapt to the sensitivity of breaker, enable in fault trip in time
Breaker open operation is controlled, tripping, the extension of accident range are prevented.
Further, the separating brake protection exit includes: high pressure zero-sequenceprotection outlet；The protection act element is used for
Synthesis zero-sequenceprotection action message and/or Special grounding zero-sequenceprotection action message are received, and the zero-sequence current synthesized meets
When default barring condition, start timing, and triggers the separating brake protection exit movement in pre-designed constantly long arrival.
During above-mentioned realization, when separating brake protection exit includes high pressure zero-sequenceprotection outlet, protection act element can
To start timing when receiving synthesis zero-sequenceprotection action message and/or Special grounding zero-sequenceprotection action message, and pre-
Design triggers the movement of separating brake protection exit when constantly length reaches.In the embodiment of the present application, default timing duration can be set to
Match with the duration of reacting of breaker, to adapt to the sensitivity of breaker, enable controlled in time in fault trip it is disconnected
Road device separating brake prevents tripping, the extension of accident range.
Further, the high pressure zero-sequenceprotection outlet is set between the bus of the programmable microcomputer protecting device；
It is more than or equal in the three-phase imbalance voltage that the open delta voltage of the bus is more than or equal to the first preset value or the bus
Second preset value, and when no-voltage secondary circuit broken string, the zero-sequence current meets default barring condition.
During above-mentioned realization, the second preset value is more than or equal to three-phase imbalance voltage or open delta voltage is greater than
Equal to the first preset value, and no-voltage secondary circuit breaks, and as the barring condition of zero-sequence current, that is, uses zero sequence unbalance voltage
Criterion with two kinds of conditions of zero-sequence current as one-phase ground protection, this can be so that there is single-phase earthing event in primary equipment
When barrier, high pressure zero-sequenceprotection outlet can be acted instantaneously, and single-phase earthing occurs in reduction, and to evolve into two-phase even three-phase short
The probability of the case where road effectively avoids the expansion of accident.
Further, the separating brake protection exit includes: under-voltage protection outlet；The protection act element is for connecing
Phase voltage minimum living shield action message is received, and three-phase voltage is in low word bit, and breaker is in "on" position, and no-voltage two
When minor loop breaks, start timing, and triggers the separating brake protection exit movement in pre-designed constantly long arrival.
During above-mentioned realization, when separating brake protection exit includes under-voltage protection outlet, protection act element can be with
Phase voltage minimum living shield action message is being received, and three-phase voltage is in low word bit, and breaker is in "on" position, and without electricity
When pressing secondary circuit broken string, and the triggering separating brake protection exit movement in pre-designed constantly long arrival.In the embodiment of the present application,
Default timing duration can be set to match with the duration of reacting of breaker, so that the sensitivity of breaker is adapted to, so that
Breaker open operation can be controlled when fault trip in time, prevents tripping, the extension of accident range.
Detailed description of the invention
Technical solution in ord to more clearly illustrate embodiments of the present application will make below to required in the embodiment of the present application
Attached drawing is briefly described, it should be understood that the following drawings illustrates only some embodiments of the application, therefore should not be seen
Work is the restriction to range, for those of ordinary skill in the art, without creative efforts, can be with
Other relevant attached drawings are obtained according to these attached drawings.
Fig. 1 is a kind of basic schematic of programmable microcomputer protecting device provided by the embodiments of the present application；
Fig. 2 is a kind of logical schematic of closing protective locking outlet provided by the embodiments of the present application；
Fig. 3 is a kind of setting structure schematic diagram of pressing plate provided by the embodiments of the present application；
Fig. 4 is a kind of connection schematic diagram of separating brake protection exit and protection act element provided by the embodiments of the present application；
Fig. 5 is a kind of logical schematic of fast tripping protection outlet provided by the embodiments of the present application；
Fig. 6 is the logical schematic of a kind of overcurrent provided by the embodiments of the present application and inverse time current protection outlet；
Fig. 7 is a kind of logical schematic of high pressure zero-sequenceprotection outlet provided by the embodiments of the present application；
Fig. 8 is a kind of logical schematic of under-voltage protection outlet provided by the embodiments of the present application；
Fig. 9 is a kind of control loop structural schematic diagram provided by the embodiments of the present application；
Figure 10 is the logical schematic of six separating brake protection exits provided by the embodiments of the present application.
Specific embodiment
Below in conjunction with the attached drawing in the embodiment of the present application, technical solutions in the embodiments of the present application is described.
Embodiment one:
To solve not exclude in failure in the related technology, in the case where warning light non-involution, splitting or integrating lock causes repeatedly
The problem of equipment damage, expansion accident, the embodiment of the present application provides a kind of programmable microcomputer protecting device.Institute referring to Figure 1
Show, programmable microcomputer protecting device includes closing protective locking outlet 102, shutting-brake control switch 101 and closing circuit of circuit breaker
103.Wherein, closing protective locking outlet 102 is series between shutting-brake control switch 101 and closing circuit of circuit breaker 103.
It should be noted that in the embodiment of the present application, shutting-brake control switch 101 be for being operated for user, from
And the equipment for generating reclosing command.Its way of realization can be the switch knob being set on control cabinet or control cabinet.In addition, In
In the embodiment of the present application, closing circuit of circuit breaker 103 is used for after receiving the information that shutting-brake control switch 101 is triggered, to
Breaker issues switching signal so that breaker closing.Closing circuit of circuit breaker 103 is applied in current change distribution technique field
Very universal, specific structure does not do specific discussion in the embodiment of the present application.
It should also be noted that, becoming distribution technique field, protection exit is also referred to as trip protection outlet, is used for
There are when failure, can act rapidly so that breaker open operation, avoids fault spread.In the embodiment of the present application, it can close a floodgate
Protection exit of connecting between control switch 101 and closing circuit of circuit breaker 103 (is known as closing protective in the embodiment of the present application
Locking outlet 102) so that transformation and distribution system there are when failure, enable to closing protective locking outlet 102 disconnect,
And just re-closed only after Failure elimination, prevent being closed when there are failure from being controlled by shutting-brake control switch 101
The generation for the case where lock is avoided in the case where failure is not eliminated, and splitting or integrating lock causes equipment damage repeatedly, expands accident.This
In need to explain is a little that aforementioned Failure elimination refers to having received the information of Failure elimination.It needs to know, in reality
In, when transformation and distribution system breaks down, it can prompt which failure specifically occur, can such as pass through corresponding alarm signal
There are which failures to prompt for signal lamp.When receiving the information of Failure elimination at this time, exist there are two types of situation, one is that failure is true
It is real to have eliminated, the information of Failure elimination can be generated at this time；Second it is that user is manually purged fault message, to report
Alert signal lamp, fault element etc. carry out involution, and also generating the information of Failure elimination at this time, (failure may not real quilt at this time
It removes).
In the embodiment of the present application, closing protective locking outlet 102 includes first terminal contact 1021 and Second terminal
Contact 1022.First terminal contact 1021 is connect with shutting-brake control switch 101, and Second terminal contact 1022 and breaker closing return
Road 103 connects.And being connected to when fault message is not eliminated between first terminal contact 1021 and Second terminal contact 1022 is broken
It opens, being connected between first terminal contact 1021 and Second terminal contact 1022 is extensive when existing all fault messages are all eliminated
It is multiply-connected to connect.In this way, realizing closing protective by first terminal contact 1021 and the direct on-off of Second terminal contact 1022
The on-off of locking outlet 102.In the embodiment of the present application, closing protective locking outlet 102 can use the protector of SEL series
In the contact that negates of a pair realize, such as can be using the outlet any OUT inside SEL751A protector.
It is worth noting that, in the embodiment of the present application, closing protective locking outlet 102 can connect N number of self-sustaining
Element (N is the positive integer more than or equal to 1).Self-sustaining element is used to enter self-insurance when the corresponding failure of self-sustaining element occurs
State is held, exits self-sustaining state in the corresponding Failure elimination of self-sustaining element.
In the embodiment of the present application, control logic can be write in programmable microcomputer protecting device, so that closing protective
When any one the self-sustaining element of locking outlet 102 in N number of self-sustaining element is in self-sustaining state, first terminal contact
Connection between 1021 and Second terminal contact 1022 disconnects, when N number of self-sustaining element is not in self-sustaining state, first
Terminal connections 1021 and Second terminal contact 1022 connect.
In the embodiment of the present application, self-sustaining element LT may include quick-break trip protection element LT01, overcurrent tripping guarantor
Protection element LT02, zero sequence trip protection element LT03, inverse time current trip protection element LT04, undervoltage tripping protection element
One of LT05, overload alarm protection element LT06 etc..It should be noted that in the embodiment of the present application, self-sustaining member
Part LT can be embodied in the form of self-holding circuit, as quick-break trip protection element LT01 can be with quick-break trip protection circuit
Form embodies, and overcurrent tripping protection element LT02 can embody in the form of overcurrent tripping protects circuit, zero sequence trip protection member
Part LT03 can be embodied in the form of zero sequence trip protection circuit, and inverse time current trip protection element LT04 can be with the inverse time lag
Current trip protects the form of circuit to embody, and undervoltage tripping protection element LT05 can protect the shape of circuit with undervoltage tripping
Formula embodies, and overload alerts protection element LT06 can embody in the form of overload alerts protection circuit.
In a kind of embodiments possible of the embodiment of the present application, six kinds of different self-sustaining elements can be selected
To select quick-break trip protection element LT01, overcurrent tripping protection element LT02, zero sequence trip protection element LT03, inverse time simultaneously
Threshold currents trip protection element LT04, undervoltage tripping protection element LT05, overload alert protection element LT06.It at this time can be with
Setting processing logic (shown in Figure 2) is OUT103=NOT (LT01+LT02+LT03+LT04+LT05+LT06), Ye Jihe
Lock protection blocking exports 102 (OUT103) and is connected when LT01 to LT06 is not triggered by fault message and entered self-sustaining state.
It should be noted that it is self-sustaining that OUT103, which characterizes the locking of the closing protective in the embodiment of the present application 102, Latch of outlet, in Fig. 2
The word bit of element, LT01-LT06 are above-mentioned respective holding element, and major function is to can oneself after the starting of protection act element
After remaining to through backstage involution fault-signal or artificially pressing protective device involution button, just exit self-sustaining state, protection therefore
Hinder lamp to disappear.Wherein, LT01 trips for fast tripping protection, relay protective scheme are as follows: (be limited to when SET01 starting=fast tripping protection element
LT01 set 1 when with upper LT01 word bit being 0, RST01 returns=and { backstage involution or going to panel involution } and upper LT01 word bit be 1
When LT01 set 0；LT02 for overcurrent protection trip, relay protective scheme are as follows: (be limited to when SET02 starting=overflow protecting element with
LT02 set 1 when upper LT02 word bit is 0, when RST02 return={ backstage involution or the involution of device panel } and upper LT02 word bit are 1
LT02 set 0；LT03 for zero-sequenceprotection trip, relay protective scheme are as follows: (be limited to when SET03 starting=zero-sequenceprotection element with it is upper
LT03 set 1 when LT03 word bit is 0, when RST03 return={ backstage involution or the involution of device panel } and upper LT03 word bit are 1
LT03 set 0；LT04 trips for inverse time current protection, relay protective scheme are as follows: (SET04 starting=inverse time current protection member
Be limited to upper LT04 word bit LT04 set 1 when being 0 when part, RST04 returns={ backstage involution or the involution of device panel } with it is upper
LT04 set 0 when LT04 word bit is 1；LT05 trips for under-voltage protection, relay protective scheme are as follows: (SET05 starting=low-voltage is protected
Be limited to upper LT05 word bit LT05 set 1 when being 0 when protection element, RST05 returns={ backstage involution or the involution of device panel } with
LT05 set 0 when upper LT05 word bit is 1；LT06 is alerted for overload protection, and relay protective scheme is (SET06 starting=overload
LT06 set 1 when being 0 is limited to upper LT06 word bit when protection alarm element, RST06 returns=and { backstage involution or device panel are multiple
Return LT06 set 0 when with upper LT06 word bit being 1.It should be noted that in the embodiment of the present application, the word bit of self-sustaining element
When being 1, characterization self-sustaining element enters self-sustaining state, and when the word bit of self-sustaining element is 0, characterization self-sustaining element is exited
Self-sustaining state.It is worth noting that, OUT103 set disconnects when being 1, it is conducting that set, which is 0,.
It is worth noting that, in the embodiment of the present application, shown in Figure 3, programmable microcomputer protecting device can also wrap
Include pressing plate 104.It should be noted that aforementioned platens are also referred to as hard pressing plate or protection pressing plate, be it is a kind of in flakes, closure and beat
Opening represents throwing and moves back, and can control first terminal contact 1021 and Second terminal contact 1022 in closing protective locking outlet 102
Connection and disconnection.In the embodiment of the present application, pressing plate 104 can be set returns in shutting-brake control switch 101 and breaker closing
Between road 103, and it is in parallel with closing protective locking outlet 102.Use when pressing plate 104 can be used as debugging also can be used as urgent solution
Lock uses, i.e., the outlet OUT103 can be shorted when pressing plate 104 uses, and blocking function is exited in realization.It should be noted that hard pressing plate
It is widely used in secondary circuit, is divided into defencive function pressing plate and output clamping two major classes, pressing plate 104 in the embodiment of the present application
Using output clamping, to control the movement of protection exit.It should be noted control of the output clamping to protection exit
Structure processed become field of power distribution in be it is very common, repeated no more in the embodiment of the present application.
In the embodiment of the present application, shown in Figure 4, programmable microcomputer protecting device further includes separating brake protection exit 105.
Separating brake protection exit 105 can be connect with protection act element 106, and protection act element 106 is to when receiving fault-signal
Starting, and trigger the movement of separating brake protection exit 105.
It should be noted that separating brake protection exit 105 is and the brake division loop of circuit breaker in programmable microcomputer protecting device
Connection, it is set between (reference can be made to shown in Fig. 9) two buses 2, the protection exit of breaker open operation can be triggered in movement.
It should be noted that protection act element 106 is also referred to as protection element in the embodiment of the present application, refer in circuit
In when there is abnormal phenomenon (such as overcurrent or overheat), circuit can be cut off immediately and play the role of protection, to prevent failure
The element of further expansion, such as fuse.
It should also be noted that, being equipped with intermediate variable, intermediate variable in protection act element 106 in the embodiment of the present application
On can be set corresponding triggering logic, in realization can by the entities such as processor, single-chip microcontroller in protection act element 106 Lai
It realizes.In the embodiment of the present application, intermediate variable can set corresponding processing logic, to realize to separating brake protection exit
105 corresponding triggering logic.It is illustrative:
In the embodiment of the present application, for example, see shown in Fig. 5, separating brake protection exit 105 may include fast tripping protection outlet,
Intermediate variable starts timing, and described point of triggering in pre-designed constantly long arrival when receiving fast tripping protection action message
Lock protection exit 105 acts.It, can be with setting processing logic, 50P1T (fast tripping protection in intermediate variable SV05 for shown in Fig. 5
Operation time limit reaches) when, PU (start-up study)=0 (starts) for i.e. SV05 zero second, and DO (returning to delay)=0.2 (is returned after i.e. 0.2 second
Return action message and export OUT301 to fast tripping protection) so that OUT301 set 1, to trigger breaker open operation.
In the embodiment of the present application, for example, see shown in Fig. 6, separating brake protection exit 105 may include overcurrent and inverse time lag
Current protection outlet, intermediate variable are opened when receiving overcurrent protection action message and/or inverse time current protection action message
Beginning timing, and trigger the separating brake protection exit 105 in pre-designed constantly long arrival and act.For shown in Fig. 6, centre becomes
Measuring can be with setting processing logic, 50P2T (starting timing element for overcurrent) or 51P1T (inverse time lag starting element) movement in SV06
When, PU=0, DO=0.2 (return action information exports OUT302 to overcurrent and inverse time current protection after i.e. 0.2 second), so that
OUT302 set 1, to trigger breaker open operation.
In the embodiment of the present application, for example, see shown in Fig. 7, separating brake protection exit 105 may include high pressure zero-sequenceprotection
Outlet, intermediate variable are used to receive synthesis zero-sequenceprotection action message and/or Special grounding zero-sequenceprotection action message, and
The zero-sequence current of synthesis starts timing when meeting default barring condition, and triggering separating brake is protected out in pre-designed constantly long arrival
Mouth 105 acts.
It is worth noting that, in actual application, when synthesis zero-sequence current IG as zero sequence ground protection in transformation
When device closes a floodgate, in the locking of not voltage conditions, it is difficult to escape the excitation surge current of starting transformer or low pressure impact in practice
Property the instantaneous out-of-balance current that generates of load, be easy malfunction, plus being delayed, when real failure is unable to precision maneuver again, sometimes
It will appear the malfunction of zero-sequence current.Therefore it is the open delta voltage of zero-sequence current more than or equal to that barring condition, which can be set,
The three-phase imbalance voltage of one preset value or zero-sequence current is more than or equal to the second preset value, and no-voltage secondary circuit breaks.
It is to use two kinds of conditions of zero sequence unbalance voltage and zero-sequence current as the criterion of one-phase ground protection, this can be so that primary
When there is singlephase earth fault, high pressure zero-sequenceprotection outlet can be acted instantaneously equipment, and reduction single-phase earthing occurs and drills
Become two-phase even three-phase shortcircuit the case where probability, effectively avoid the expansion of accident.
For shown in Fig. 7, (time limit can be started for zero-sequence current in intermediate variable SV07 with setting processing logic, 50N1T
Element) or (information that 51G1T movement generates is to synthesize zero-sequenceprotection when 51G1T (synthesis zero sequence start timing element) movement
Action message, the information that 50N1T movement generates is Special grounding zero-sequenceprotection action message), and 59S1 (open delta electricity
Pressure) be more than or equal to 30V, VG-MAG (three-phase imbalance voltage) be more than or equal to 30V, no-voltage secondary circuit broken string (LOP, also referred to as
Non- PT broken string) when, PU=0, DO=0.2 (return action information exports OUT303 to high pressure zero-sequenceprotection after i.e. 0.2 second), so that
OUT303 set 1, to trigger breaker open operation.
In the embodiment of the present application, for example, see shown in Fig. 8, separating brake protection exit 105 may include that under-voltage protection goes out
Mouthful, intermediate variable is receiving phase voltage minimum living shield action message, and three-phase voltage is in low word bit, and breaker is in and closes a floodgate
State, and start timing when no-voltage secondary circuit broken string, and trigger the separating brake in pre-designed constantly long arrival and protect out
Mouth 105 acts.For shown in Fig. 8, (time limit can be started for low-voltage in intermediate variable SV08 with setting processing logic, 27P1T
Element) movement when, and three-phase voltage is in low word bit (3P27), and breaker is in "on" position (52A), and no-voltage is secondary
When circuit breaking (LOP), (i.e. starting operation in 0 second exports OUT304 to under-voltage protection, returns after 0.2 second by PU=0, DO=0.2
OUT304 movement) so that OUT304 set 1, to trigger breaker open operation.
It should be noted that Fig. 5 examples cited into Fig. 8 are only several optional examples in the embodiment of the present application, not generation
Table the embodiment of the present application only can carry out logic configuration according to above-mentioned example.For example, can be set to non-zero other values for PU,
It may be set to be the other values of non-zero .2 for DO.For PU and DO value setting can by user according to actual needs into
Row setting.
It will be appreciated that being at present directly to be triggered by protection act element 106 for the triggering of separating brake protection exit 105
, i.e., when protection act element 106 acts, needing not move through intermediate variable, can directly to trigger separating brake protection exit 105 dynamic
Make.But in this scheme, when flashover, short circuit, instantaneous fault trip occurs, due to the sensitivity and movement of breaker
Mechanism response speed problem, for less than 60ms in short-term, transient fault although there is protection act, but breaker but cannot
Timely separating brake.And in the above scheme, corresponding return can be set by intermediate variable to be delayed, so that separating brake is protected
The time that outlet 105 is triggered can match with the sensitivity requirement of breaker, so that the sensitivity of breaker is adapted to, so that
Breaker open operation can be controlled when fault trip in time, prevents tripping, the extension of accident range.
To sum up, provided by the embodiment of the present application may be programmed microcomputer protecting device, by shutting-brake control switch 101 and break
It is connected between road device closing circuit 103 into a closing protective locking outlet 102, and closing protective locking outlet 102 is matched
It is set to first terminal contact 1021 and Second terminal contact 1022 when fault message is not eliminated in it to disconnect, in failure
First terminal contact 1021 and Second terminal contact 1022 when information is eliminated in it restore connection.This is allowed in fault message
When not eliminating, shutting-brake control switch 101 is separated with closing circuit of circuit breaker 103, so that shutting-brake control switch 101 is operated
When corresponding switching signal also can not pass to breaker by closing circuit of circuit breaker 103, i.e., so that shutting-brake control switch 101
Shutting-brake control ability of the transitory loss to breaker；And after fault message elimination, then first terminal contact 1021 and second end
Sub- contact 1022 restores connection, is connected to again between shutting-brake control switch 101 and closing circuit of circuit breaker 103, shutting-brake control is opened
Breaker can be passed to by closing circuit of circuit breaker 103 by closing 101 corresponding switching signals when being operated, so that breaker closes
Lock.Which solves do not exclude in failure in the related technology, warning light non-involution in the case where, splitting or integrating lock causes repeatedly
The problem of equipment damage, expansion accident.
Embodiment two:
The present embodiment is this by taking a kind of more specific programmable microcomputer protecting device as an example on the basis of example 1
Further illustration is done in application.
Circuit structure shown in Figure 9, Fig. 9 are that the control that may be programmed in microcomputer protecting device in the embodiment of the present application is returned
Line structure, in the embodiment of the present application, protective device use the protector of SEL-751A type.According to Fig. 9 as it can be seen that the application is implemented
In the scheme of example, the normally opened contact A07 and A08 that a pair that can be sealed in far control closing circuit negates (are held in shutting-brake control
Close normally opened contact A07 and A08 that a pair sealed between 101 and closing circuit of circuit breaker 103 negates).Closing protective when normal
Interface OUT103=1, contact A 07 and A08 closure；When high-voltage board fault trip protection act or control power supply power-fail,
The contact A 07 and A08 of OUT103 disconnects, and device alarm lamp is lighted.Only equal debugging, artificially falls alarm in hyperbaric chamber involution
After signal lamp, A07 and A08 can just be closed, realize remote control operation again.In addition, a protection in parallel also at OUT103
Hard pressing plate 5LP is moved back by the throwing of hard pressing plate 5LP flexibly to realize the on-off control to OUT103.In the embodiment of the present application, join
As shown in Figure 2, the logic of protection exit OUT103 is OUT103=NOT (LT01+LT02+LT03+LT04+LT05+LT06), i.e.,
It is connected (when word bit is 0) when self-sustaining element LT01 to LT06 is not triggered by fault message and entered self-sustaining state.
In the embodiment of the present application, LT01 is quick-break trip protection element, LT02 is overcurrent tripping protection element, LT03 is zero sequence tripping
Protection element, LT04 are inverse time current trip protection element, LT05 is undervoltage tripping protection element, LT06 is that overload is accused
Alert protection element.In the embodiment of the present application, the major function of self-sustaining element be when protection element starting after, can be with self-sustaining
To passing through backstage involution fault-signal or artificially pressing protective device involution button, self-sustaining element just exits self-sustaining state, protects
Shield trouble light just disappears (illustrative, self-sustaining element, which can be set, is defined as trouble light).
Furthermore it is further noted that in the embodiment of the present application, between the bus in programmable microcomputer protecting device also
It is provided with separating brake protection exit OUT301 to OUT304, wherein OUT301 is fast tripping protection outlet；OUT302 is overcurrent and inverse time
Threshold currents protection exit；OUT303 is high pressure zero-sequenceprotection outlet；OUT304 is under-voltage protection outlet.OUT301 to OUT304
Parallel connection, and connect with brake division loop of circuit breaker, thus after any of OUT301 to OUT304 protection exit is triggered
Brake division loop of circuit breaker is connected, to control breaker open operation.
In the embodiment of the present application, shown in Figure 10, Figure 10 is the triggering logic of OUT301 to OUT304, is patrolled at this
In volume, when protection act element starts, 0S starts timing, and protection act element SV05 to SV08 element returns to delay 0.20S, makes
Corresponding outlet action delay 200ms, the sensitivity of Lai Shiying breaker, outlet actuation time can meet different manufacturers breaker
Operation time limit requirement, in fault trip timely tripping circuit breaker, prevent tripping, accident range extension.
Here it is worth noting that being In (transformation with the excitation surge current maximum value for carrying starting transformer in practical applications
Device rated current) 4~8 times, the duration be general 20ms.When synthesizing zero-sequence current IG as zero sequence ground protection, In
When there is no the locking of voltage conditions, be difficult to escape the excitation surge current of starting transformer or low pressure impact load generates it is instantaneous not
Balanced balanced current is easy to produce malfunction, simultaneously because there is delay, it again may not be able to precision maneuver for real failure, it is possible to
It will appear the malfunction of zero-sequence current.Therefore, referring to the triggering logic of OUT303 in Figure 10, high pressure zero-sequenceprotection is exported
OUT303 can add three-phase imbalance voltage (bis- sub-value of VG_MAG=30V) or open delta voltage (59S1=30V bis- times
Value) and non-PT broken string, as the barring condition of zero-sequence current movement, the action delay of cancellation zero sequence ground protection uses zero sequence
Criterion of the two kinds of conditions of unbalance voltage and zero-sequence current as one-phase ground protection, no-delay movement outlet, primary equipment go out
Existing singlephase earth fault, snap action protection exit, while accomplishing that signal uploads monitoring system alarm function immediately.Intermediate variable
SV07 instantaneous starting 0SSet 1,0.2 when acting return time delaySSet 0.
It should be noted that the part in attached drawing 9 in dotted line frame A is closing circuit of circuit breaker.In attached drawing 9 in dotted line frame B
Part be brake division loop of circuit breaker, the part in attached drawing 9 in dotted line frame B is closing locking circuit of breaker, and is located at scene
OUT01 and OUT02 between shutting-brake control switch 101 and live separating brake switch are that the on/off switch of programmable microcomputer protecting device goes out
Mouthful.It is to be appreciated that the specific setting of these circuits or outlet can use the setting structure of Fig. 9 in the application, but
Remaining setting structure can be used, in this application without limitation.It should also be noted that, the KM1 of attached drawing 9 indicates control electricity
Source, ZK1 are control power switch, and S8 is switchgear testing position, and S9 is switchgear operating position, and QF is that breaker auxiliary is opened
It closes, HT is separating brake indicator light, and HR is combined floodgate indicator light, and SF is test switch knob, and QK is the selection of a distant place/on the spot switch, and KK is
Closing by hand/separating brake control switch, HWJ are middle position relay, and HQ is closing coil, and TQ is opening coil, and LP is connection
Piece, 1n:SEL-751A are microcomputer protecting device, and Y1 is closing locking circuit coil part, and R1 is closing locking circuit resistance member
Part, S1 are energy storage motor energy storage state contact, and Y1 is anti-jump loop coil part for locked loop contact, K0, and K0/R0 is anti-
Loop Contacts are jumped, POWER is power supply.
Through the above scheme, it is possible to prevente effectively from do not exclude in failure, warning light non-involution in the case where, repeatedly
The problem of splitting or integrating lock causes equipment damage, expands accident.It also can be effectively prevented and cause because the single-phase earthing time limit is too long simultaneously
The accident of three-phase shortcircuit.Further, it is also possible to adapt to the sensitivity of breaker, enables and control breaker in time in fault trip
Separating brake prevents tripping, the extension of accident range.
In embodiment provided herein, it should be understood that disclosed device and method, it can be by others side
Formula is realized.The apparatus embodiments described above are merely exemplary, for example, the division of the unit, only one kind are patrolled
Function division is collected, there may be another division manner in actual implementation, in another example, multiple units or components can combine or can
To be integrated into another system, or some features can be ignored or not executed.Another point, shown or discussed is mutual
Coupling, direct-coupling or communication connection can be INDIRECT COUPLING or communication link by some communication interfaces, device or unit
It connects, can be electrical property, mechanical or other forms.
In addition, unit may or may not be physically separated as illustrated by the separation member, as unit
The component of display may or may not be physical unit, it can and it is in one place, or may be distributed over more
In a network unit.Some or all of unit therein can be selected to realize this embodiment scheme according to the actual needs
Purpose.
Furthermore each functional module in each embodiment of the application can integrate one independent portion of formation together
Point, it is also possible to modules individualism, an independent part can also be integrated to form with two or more modules.
Herein, relational terms such as first and second and the like be used merely to by an entity or operation with it is another
One entity or operation distinguish, and without necessarily requiring or implying between these entities or operation, there are any this reality
Relationship or sequence.
The above description is only an example of the present application, the protection scope being not intended to limit this application, for ability
For the technical staff in domain, various changes and changes are possible in this application.Within the spirit and principles of this application, made
Any modification, equivalent substitution, improvement and etc. should be included within the scope of protection of this application.
Claims (10)
1. a kind of programmable microcomputer protecting device characterized by comprising closing protective locking outlet, shutting-brake control switch and
Closing circuit of circuit breaker；
Closing protective locking outlet is series between the shutting-brake control switch and closing circuit of circuit breaker；
Closing protective locking outlet includes first terminal contact and Second terminal contact；The first terminal contact with it is described
Shutting-brake control switch connection, the Second terminal contact are connect with the closing circuit of circuit breaker；
Disconnection when fault message is not eliminated is connected between the first terminal contact and the Second terminal contact；
Being connected to when the fault message is eliminated between the first terminal contact and the Second terminal contact restores connection.
2. programmable microcomputer protecting device as described in claim 1, which is characterized in that closing protective locking outlet connection
There is N number of self-sustaining element；The self-sustaining element is used to enter self-sustaining when the corresponding failure of the self-sustaining element occurs
State exits the self-sustaining state in the corresponding Failure elimination of the self-sustaining element；The N is just more than or equal to 1
Integer；
Any one the self-sustaining element of closing protective locking outlet in N number of self-sustaining element is in self-sustaining state
When, the first terminal contact and Second terminal contact disconnect；Self-sustaining shape is not in N number of self-sustaining element
When state, the first terminal contact is connected with Second terminal contact.
3. programmable microcomputer protecting device as claimed in claim 2, which is characterized in that the self-sustaining element include with down toward
It is one of few:
Quick-break trip protection element；
Overcurrent tripping protection element；
Zero sequence trip protection element；
Inverse time current trip protection element；
Undervoltage tripping protection element；
Overload alerts protection element.
4. programmable microcomputer protecting device as described in claim 1, which is characterized in that further include pressing plate；
The pressing plate is connected between the shutting-brake control switch and the closing circuit of circuit breaker, and is closed with the closing protective
It is lock out mouth parallel connection, for controlling the connection of first terminal contact and Second terminal contact described in closing protective locking outlet
With disconnection.
5. programmable microcomputer protecting device according to any one of claims 1-4, which is characterized in that further include that separating brake is protected out
Mouthful；
The separating brake protection exit is connect with the protection act element, and the protection act element is used to receive failure letter
Number Shi Qidong, and trigger the separating brake protection exit movement.
6. programmable microcomputer protecting device as claimed in claim 5, which is characterized in that the separating brake protection exit includes: speed
Disconnected protection exit；
The protection act element is used for when receiving fast tripping protection action message, starts timing, and in default timing duration
The separating brake protection exit movement is triggered when arrival.
7. programmable microcomputer protecting device as claimed in claim 5, which is characterized in that the separating brake protection exit included:
Stream and inverse time current protection outlet；
The protection act element is for receiving overcurrent protection action message and/or inverse time current protection action message
When, start timing, and the separating brake protection exit movement is triggered in pre-designed constantly long arrival.
8. programmable microcomputer protecting device as claimed in claim 5, which is characterized in that the separating brake protection exit includes: height
Press zero-sequenceprotection outlet；
The protection act element is used to receive synthesis zero-sequenceprotection action message and/or Special grounding zero-sequenceprotection movement
Information, the and when zero-sequence current synthesized meets default barring condition, starts timing, and it is pre-designed constantly it is long reach when trigger institute
State the movement of separating brake protection exit.
9. programmable microcomputer protecting device as claimed in claim 8, which is characterized in that high pressure zero-sequenceprotection outlet setting
Between the bus of the programmable microcomputer protecting device；It is more than or equal to the first preset value in the open delta voltage of the bus
Or the three-phase imbalance voltage of the bus is more than or equal to the second preset value, and when no-voltage secondary circuit broken string, the zero sequence
Current protection meets default barring condition.
10. programmable microcomputer protecting device as claimed in claim 5, which is characterized in that the separating brake protection exit includes: low
Voltage protection outlet；
The protection act element is used to receive phase voltage minimum living shield action message, and three-phase voltage is in low word bit, and
Breaker is in "on" position, and when no-voltage secondary circuit broken string, starts timing, and trigger in pre-designed constantly long arrival
The separating brake protection exit movement.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201910826957.4A CN110474288B (en) | 2019-09-02 | 2019-09-02 | Programmable microcomputer protection device |
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|---|---|---|---|
| CN201910826957.4A CN110474288B (en) | 2019-09-02 | 2019-09-02 | Programmable microcomputer protection device |
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| CN111193239A (en) * | 2020-02-17 | 2020-05-22 | 岳阳长炼机电工程技术有限公司 | Relay protection action locking motor starting device |
| CN111668819A (en) * | 2020-06-22 | 2020-09-15 | 广东韶钢松山股份有限公司 | Line protection control method and microcomputer protection device |
| CN113140971A (en) * | 2021-04-27 | 2021-07-20 | 广东韶钢松山股份有限公司 | Anti-vibration high tension switchgear circuit breaker anti-jumping system |
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| CN110474288B (en) | 2021-06-25 |
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