CN105788983A - Circuit breaker control system and method - Google Patents
Circuit breaker control system and method Download PDFInfo
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- CN105788983A CN105788983A CN201610266172.2A CN201610266172A CN105788983A CN 105788983 A CN105788983 A CN 105788983A CN 201610266172 A CN201610266172 A CN 201610266172A CN 105788983 A CN105788983 A CN 105788983A
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- H—ELECTRICITY
- H01—ELECTRIC ELEMENTS
- H01H—ELECTRIC SWITCHES; RELAYS; SELECTORS; EMERGENCY PROTECTIVE DEVICES
- H01H71/00—Details of the protective switches or relays covered by groups H01H73/00 - H01H83/00
- H01H71/10—Operating or release mechanisms
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Abstract
The present invention discloses a circuit breaker control system and method. The system comprises an identification circuit, a closing pulse generation circuit, a closing coil, a power supply and a closing control switch used for controlling the closing coil whether to be connected with the power supply, wherein the identification circuit determines a current instruction state according to the existence of a closing instruction and an opening instruction and generates a closing pulse generation instruction when the current instruction state is a closing state, the closing pulse generation circuit generates a closing pulse when detecting the closing pulse generation instruction, and the closing control switch connects the closing coil and the power supply when detecting the closing pulse, so that the closing coil finishes the closing operation. According to the present invention, only the current instruction state is the closing state, the closing operation is executed, namely, the closing operation is not executed even through the closing instruction and the opening instruction exist simultaneously, so that a repeated closing and tripping phenomenon is avoided effectively, and the working performance of a circuit breaker is improved.
Description
Technical field
The present invention relates to technical field of electric equipment, particularly relate to a kind of breaker control system and method.
Background technology
It is known that chopper is the important electrical of power plant and transformer station, its effect is: under normal operating conditions, is switched on or switched off high-tension circuit, changes the method for operation etc. of primary equipment and main system；Under nonserviceabling, excise faulty equipment, to ensure main system safe operation and to alleviate breakdown loss.
In the operating mechanism of chopper, breaker closing is usually by short time energising design, and namely the closing coil of chopper can only obtain electric the short time (in closing pulse width).After carrying out closing operation, chopper may cannot release reclosing command due to reasons such as combined floodgate guard relay adhesion or circuit breaker failures, chopper will close a floodgate again, and such chopper easily occurs repeatedly closing trip phenomenon, affects the service behaviour of chopper.
Based on this, need badly a kind of it can be avoided that there is repeatedly closing breaker control system and the method for trip phenomenon, and then improve the service behaviour of chopper.
Summary of the invention
In view of this, the invention provides a kind of breaker control system and method, repeatedly close trip phenomenon to avoid the occurrence of, and then improve the service behaviour of chopper.
For solving above-mentioned technical problem, the present invention provides a kind of breaker control system, including: identification circuit, closing pulse generative circuit, closing coil, power supply and control described closing coil and described power on whether shutting-brake control switch；Wherein:
Described identification circuit is for having nil case according to reclosing command and separating brake instruction, it is determined that current command status, and when described current command status is "on" position, generates closing pulse and generate instruction；Wherein, described command status includes "on" position, gate-dividing state, on/off switch state or without mode of operation；
Described closing pulse generative circuit is for when detecting that described closing pulse generates instruction, generating closing pulse；
Described shutting-brake control switch is for when described closing pulse being detected, connecting described closing coil and described power supply, so that described closing coil completes closing operation.
Preferably, described identification circuit includes reclosing command detection electronic circuit, separating brake command detection electronic circuit and the identification electronic circuit being all connected with described reclosing command detection electronic circuit and described separating brake command detection electronic circuit；
Described reclosing command detection electronic circuit is used for detecting described reclosing command；
Described separating brake command detection electronic circuit is used for detecting described separating brake instruction；
According to described reclosing command, described identification electronic circuit is for detecting whether electronic circuit detects described reclosing command and according to whether described separating brake command detection electronic circuit detects described separating brake instruction, determine described current command status, and when described current command status is "on" position, generates described closing pulse and generate instruction.
Preferably, described reclosing command detection electronic circuit includes reclosing command sampling resistor and combined floodgate photo-coupler；Described separating brake command detection electronic circuit includes separating brake instruction sampling resistor and separating brake photo-coupler；Described identification electronic circuit includes combined floodgate diode and separating brake diode；
The signal of telecommunication of the described reclosing command of one end sampling of described reclosing command sampling resistor, another terminates the electrode input end of described combined floodgate pipe bonder；The negative input of described combined floodgate photo-coupler connects the negative pole of described power supply, and emitter-base bandgap grading output terminates the negative electrode of described combined floodgate diode；
The signal of telecommunication of one end described separating brake instruction of sampling of described separating brake instruction sampling resistor, another terminates the electrode input end of described separating brake pipe bonder；The negative input of described separating brake photo-coupler connects the negative pole of described power supply, and emitter-base bandgap grading output terminates the negative electrode of described separating brake diode；
The common port of the anode of described combined floodgate diode and the anode of described separating brake diode is as the outfan of described identification electronic circuit.
Preferably, described closing pulse generative circuit includes scintilla circuit and monostable flipflop；
The input of described scintilla circuit terminates the outfan of described identification electronic circuit, and output terminates the clock port of described monostable flipflop, and the positive pulse output of described monostable flipflop terminates described shutting-brake control switch.
Preferably, described shutting-brake control switch is insulated gate bipolar transistor；
The grid of described insulated gate bipolar transistor connects described closing pulse generative circuit, emitter-base bandgap grading connects one end of described closing coil and colelctor electrode connects the positive pole of described power supply；
The negative pole of another described power supply of termination of described closing coil.
Preferably, also include:
It is connected to the optocoupler trigger between the grid of described insulated gate bipolar transistor and described closing pulse generative circuit.
Preferably, also include:
The reclosing command generative circuit being all connected with described identification circuit and separating brake command generating circuit；
Described reclosing command generative circuit for generating described reclosing command when combined floodgate demand being detected；Described separating brake command generating circuit for generating described separating brake instruction when separating brake demand being detected.
Preferably, described reclosing command generative circuit is combined floodgate holding contact, and one end of described combined floodgate holding contact is connected with the positive pole of described power supply, and the other end is connected with described identification circuit；
Separating brake command generating circuit is separating brake holding contact, and one end of described separating brake holding contact is connected with the positive pole of described power supply, and the other end is connected with described identification circuit.
Preferably, also include:
Jump position monitor resistance and jump position relay；
Described jumping position monitors that the one of resistance terminates the colelctor electrode of described insulated gate bipolar transistor, and another terminates the emitter-base bandgap grading of described insulated gate bipolar transistor；
Described jumping position relay is parallel to described combined floodgate holding contact.
Present invention also offers a kind of breaker control method, being applied to breaker control system, described breaker control system includes identification circuit, closing pulse generative circuit, closing coil, power supply and controls described closing coil and described power on whether shutting-brake control switch；
The method includes:
Described identification circuit has nil case according to reclosing command and separating brake instruction, it is determined that current command status, and when described current command status is "on" position, generates closing pulse and generate instruction；Wherein, described command status includes "on" position, gate-dividing state, on/off switch state or without mode of operation；
Described closing pulse generative circuit, when detecting that described closing pulse generates instruction, generates closing pulse；
Described shutting-brake control switchs when described closing pulse being detected, connects described closing coil and described power supply, so that described closing coil completes closing operation.
Above in a kind of breaker control system provided by the invention and method, breaker control system includes identification circuit, closing pulse generative circuit, closing coil, power supply and controls described closing coil and described power on whether shutting-brake control switch；Specifically, described identification circuit has nil case according to reclosing command and separating brake instruction, it is determined that current command status, and when described current command status is "on" position, generates closing pulse and generate instruction；Wherein, described command status includes "on" position (only reclosing command), gate-dividing state (only separating brake instruction), on/off switch state (reclosing command and separating brake instruction exist simultaneously) and without mode of operation (reclosing command and separating brake instruction are absent from) simultaneously；Described closing pulse generative circuit, when detecting that described closing pulse generates instruction, generates closing pulse；Described shutting-brake control switchs when described closing pulse being detected, connects described closing coil and described power supply, so that described closing coil completes closing operation.
As can be seen here, in the present invention, when only current command status is "on" position, closing pulse generative circuit just can generate closing pulse, and then just can perform corresponding closing operation, that is, even if reclosing command and the simultaneous situation of separating brake instruction (namely owing to the reasons such as combined floodgate guard relay adhesion or circuit breaker failure cannot release reclosing command) occur, without performing closing operation, visible, present invention effectively prevents appearance and repeatedly close trip phenomenon, and then improve the service behaviour of chopper.
Accompanying drawing explanation
In order to be illustrated more clearly that the embodiment of the present invention or technical scheme of the prior art, the accompanying drawing used required in embodiment or description of the prior art will be briefly described below, apparently, accompanying drawing in the following describes is only embodiments of the invention, for those of ordinary skill in the art, under the premise not paying creative work, it is also possible to obtain other accompanying drawing according to the accompanying drawing provided.
The structured flowchart schematic diagram of a kind of breaker control system that Fig. 1 provides for the embodiment of the present invention；
The structural representation of identification circuit in Fig. 1 that Fig. 2 provides for the embodiment of the present invention；
The attachment structure schematic diagram of the breaker control system that Fig. 3 provides for the embodiment of the present invention and chopper；
The electrical block diagram of a kind of breaker control system that Fig. 4 provides for the embodiment of the present invention；
The flow chart of a kind of breaker control method that Fig. 5 provides for the embodiment of the present invention.
Detailed description of the invention
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described, it is clear that described embodiment is only a part of embodiment of the present invention, rather than whole embodiments.Based on the embodiment in the present invention, the every other embodiment that those of ordinary skill in the art obtain under not making creative work premise, broadly fall into the scope of protection of the invention.
The core of the present invention is to provide a kind of breaker control system and method, repeatedly closes trip phenomenon to avoid the occurrence of, and then improves the service behaviour of chopper.
In order to make those skilled in the art be more fully understood that the present invention program, below in conjunction with the drawings and specific embodiments, the present invention is described in further detail.
With reference to Fig. 1, Fig. 1 illustrates the structured flowchart schematic diagram of a kind of breaker control system that the embodiment of the present invention provides, this system mainly includes identification circuit 100, closing pulse generative circuit 101, closing coil 103 (also referred to as HQ), power supply KM and controls closing coil 103 and power on whether shutting-brake control switch 102, and, in the present invention, the presence or absence of reclosing command HX and separating brake instruction FX identifies whether to need to carry out closing operation and sub-switching operation, and closing pulse mark needs to carry out closing operation and control closing coil 103 carrying out corresponding closing operation.Command status in circuit has four kinds of situations, namely (only reclosing command), gate-dividing state (only separating brake instruction), on/off switch state (reclosing command and separating brake instruction exist simultaneously) and without mode of operation (reclosing command and separating brake instruction are absent from) simultaneously.Specifically:
Identification circuit 100 is for having nil case according to reclosing command and separating brake instruction, determine current command status, and when current command status is "on" position, generate closing pulse and generate instruction, namely identification circuit 100 is according to current command status, it is judged that currently whether meet closing pulse formation condition, specifically, when current command status is "on" position, it is believed that meet combined floodgate formation condition；Closing pulse generative circuit 101 is connected with identification circuit 100, for when detecting that closing pulse generates instruction, generating closing pulse；Shutting-brake control switch 102 is connected with closing pulse, for when closing pulse being detected, connecting closing coil 103 and power supply, so that closing coil 103 completes closing operation.
Wherein, power supply KM includes positive pole (+KM) and negative pole (-KM).
Further, present system can also include the reclosing command generative circuit 104 and the separating brake command generating circuit 105 that are all connected with identification circuit 100, and reclosing command generative circuit 104 for generating reclosing command when combined floodgate demand being detected；Separating brake command generating circuit 105 for generating separating brake instruction when separating brake demand being detected.
It is understood that present system could be included for the switching winding 106 (also referred to as TQ) of sub-switching operation, one end of switching winding 106 is connected with separating brake command generating circuit 105, and the other end is connected with the negative pole (-KM) of power supply.
In specific implementation process, with reference to Fig. 2, identification circuit 100 can include reclosing command detection electronic circuit 1000, separating brake command detection electronic circuit 1001 and the identification electronic circuit 1002 being all connected with reclosing command detection electronic circuit 1000 and separating brake command detection electronic circuit 1001, reclosing command detection electronic circuit 1000 is connected with reclosing command generative circuit 104, separating brake command generating circuit 105 respectively with separating brake command detection electronic circuit 1001, and is respectively used to detection reclosing command, separating brake instruction；Identify according to reclosing command, electronic circuit is for detecting whether electronic circuit 1000 detects reclosing command and according to whether separating brake command detection electronic circuit 1001 detects separating brake instruction, determine current command status, and when current command status is "on" position, generates closing pulse and generate instruction.
As can be seen here, in the present invention, when only current command status is "on" position, closing pulse generative circuit 101 just can generate closing pulse, and then just can perform corresponding closing operation, that is, even if reclosing command and the simultaneous situation of separating brake instruction (namely owing to the reasons such as combined floodgate guard relay adhesion or circuit breaker failure cannot release reclosing command) occur, without performing closing operation, visible, present invention effectively prevents appearance and repeatedly close trip phenomenon, and then improve the service behaviour of chopper.
Based on the technical scheme disclosed in the invention described above embodiment, in an alternative embodiment of the invention, based on practical application, further, attachment structure schematic diagram with reference to the breaker control system shown in Fig. 3 with chopper, wherein, handcart testing position switch S8 and S9, location aided rebroadcast switch QF1, closing coil HQ, shutting-brake control switch 102 and energy storage position switch S1 form closing circuit；Location aided rebroadcast switch QF2 and switching winding TQ forms sub-gate circuit.
In the present invention, shutting-brake control switch 102 is specifically as follows insulated gate bipolar transistor VT1；The grid of insulated gate bipolar transistor engages lock pulse generation circuit 101, emitter-base bandgap grading connects one end of closing coil HQ by energy storage position switch S1, colelctor electrode concatenates handcart testing position in the line and switchs being connected of positive pole (+KM) of S8 and S9, combined floodgate holding contact HBJ and power supply after passing sequentially through location aided rebroadcast switch QF1, parallel connection；The negative pole (-KM) of another termination power of closing coil HQ.
Wherein, combined floodgate holding contact HBJ is as reclosing command generative circuit 104, and its one end is connected with the positive pole (+KM) of power supply, and the other end is connected with identification circuit 100；Similarly, separating brake holding contact TBJ is as separating brake command generating circuit 105, and its one end is connected with the positive pole (+KM) of power supply, and the other end is connected with identification circuit 100.
Further, for combined floodgate aspect, present system can also include jumping position and monitors resistance R12 and jump position relay TWJ；Jump the colelctor electrode that position monitors a termination insulated gate bipolar transistor of resistance R12, the emitter-base bandgap grading of another termination insulated gate bipolar transistor；Jump position relay and be parallel to combined floodgate holding contact.For separating brake aspect, present system can also include closing position relay HWJ；Close position relay and be parallel to separating brake holding contact.
In actual applications, it is possible to combined floodgate holding contact HBJ, separating brake holding contact TBJ, jumping position relay TWJ and conjunction position relay HWJ are arranged in breaker operation cabinet.
Based on breaker control system disclosed in the various embodiments described above, in yet another embodiment of the invention, with reference to Fig. 4, reclosing command detection electronic circuit 1000 specifically can include reclosing command sampling resistor and combined floodgate photo-coupler U1 (being called for short optocoupler U1), in the specific implementation, reclosing command sampling resistor can be composed in series by resistance R1 and resistance R2.Separating brake command detection electronic circuit 1001 specifically can separating brake instruction sampling resistor and separating brake photo-coupler U2 (being called for short optocoupler U2), in the specific implementation, separating brake instruction sampling resistor can be made up of resistance R5 and resistance R6.Identify that electronic circuit specifically can include combined floodgate diode D1 and separating brake diode D2；The common port of the anode of combined floodgate diode and the anode of separating brake diode is as the outfan identifying electronic circuit, namely the outfan of identification circuit 100, represents with A point in Fig. 4.
One end of reclosing command sampling resistor is from the signal of telecommunication of reclosing command test point HX sampling reclosing command, and the other end engages the electrode input end (i.e. 1 foot of U1 in Fig. 4) of brake tube bonder；The negative input (i.e. 2 feet of U1 in Fig. 4) of combined floodgate photo-coupler connects the negative pole of power supply, and emitter-base bandgap grading outfan engages the negative electrode of lock diode.
One end of separating brake instruction sampling resistor is from the signal of telecommunication of separating brake command detection point FX sampling separating brake instruction, and another terminates the electrode input end of separating brake pipe bonder；The negative input of separating brake photo-coupler connects the negative pole of power supply, the negative electrode of emitter-base bandgap grading output termination separating brake diode.
In the present invention, for closing pulse generative circuit 101, it specifically can include scintilla circuit and monostable flipflop；The input termination of scintilla circuit identifies the outfan of electronic circuit, the clock port (i.e. CLK end) of outfan order steady state trigger, and the positive pulse outfan (i.e. Q end) of monostable flipflop connects shutting-brake control switch 102.Wherein, scintilla electricity routing capacitance C1 and resistance R8 composition；Monostable flipflop is made up of d type flip flop, resistance R9 and electric capacity C2, and annexation can refer to shown in Fig. 4, it is possible to realize present invention monostable flipflop herein with reference to prior art.
It is understood that in the present invention, the width of breaker closing pulse is relevant with resistance R9 and electric capacity C2, design value makes pulse width more than the normal closing time of chopper, desirable 50～60ms.In figure, VR is varistor, and D5 is transient voltage suppressor diode, and R13, D4 and C6 form resistance capaciting absorpting circuit.Varistor VR and transient voltage suppressor diode D5 mainly suppresses peak overvoltage, and resistance capaciting absorpting circuit mainly suppresses to turn off overvoltage.
Additionally, present system can also include the optocoupler trigger U4 being connected between the grid of insulated gate bipolar transistor and closing pulse generative circuit 101, to ensure the electric signal isolation degree between the grid of insulated gate bipolar transistor and closing pulse generative circuit 101.
For the connection scheme of the connection scheme of other component in Fig. 4 He other port, can realize on the basis of institute of the present invention attributive function, it is possible to reference to prior art, the present invention does not do too much elaboration at this.
The circuit concrete scheme of summary breaker control system, the operation principle of breaker control system of the present invention is:
(without under operational circumstances) during control system normal power-up, switching signal test point HX and sub-gate signal test point FX no-voltage, optocoupler U1 and optocoupler U2 no current pass through, for cut-off state, 3 feet of optocoupler U1 are output as low level, and 4 feet of optocoupler U2 are output as high level, A point voltage is low level, the Q end of trigger U3 is output as low level, and optocoupler U4 is output as low level, and transistor VT1 is off state.Under normal circumstances, circuit breaker cart is in testing position or operating position, i.e. testing position switch S8 or operating position switch S9 Guan Bi, and energy storage switch S1 Guan Bi, now the C end of VT1 and E end are under forward voltage bias.
null(the only reclosing command when chopper carries out closing operation，I.e. "on" position)，(HX point produces voltage to combined floodgate holding contact HBJ Guan Bi in breaker operation cabinet，There is reclosing command)，Power supply+KM is through resistance R1、R2、Optocoupler U1 forms loop，Optocoupler U1 turns on，3 feet of optocoupler U1 are output as high level，Optocoupler U2 is because of FX point no-voltage (being absent from separating brake instruction)，Its 4 foot is output as high level，A point voltage is output as high level (only to be had at HX point in voltage and the no-voltage situation of FX point for high level，Think that namely A point voltage high level sends closing pulse to closing pulse generative circuit 101 and generate instruction)，Peaker through C1 and R8 composition，3 feet (the i.e. CLK port) input of U3 is pulse signal，The Q end of trigger U3 is output as high level pulse (high level pulse is generation closing pulse)，Optocoupler U4 is output as high level pulse，Transistor VT1 turns on，Breaker closing coil HQ is energized，Carry out closing operation.Under normal circumstances, after combined floodgate puts in place, auxiliary switch for circuit breaker QF1 normally-closed contact disconnects, and cuts off closing coil loop, and VT1 turns off.Combined floodgate holding contact HBJ disconnects, and 3 feet of optocoupler U1 are output as low level, and circuit returns to normal power-up state.
Need exist for special instruction be, in the present invention, optocoupler U4 is output as high level pulse signal, after closing pulse lost efficacy (namely there is no closing pulse), transistor VT1 turns off because grid bears negative voltage, cut off closing coil loop, effectively prevent closing coil HQ long time energising burn, problems with of the prior art can't occur: may cause because of chopper self reason that combined floodgate is unsuccessful, and close a floodgate and unsuccessful auxiliary switch for circuit breaker QF1 normally-closed contact cannot be disconnected, in turn result in breaker closing coil HQ long time energising.
Meanwhile, in the prior art, it is possible to cannot being closed by chopper because of the reason of chopper own, chopper returns to again gate-dividing state, repeatedly " close-point " phenomenon of chopper can be produced, namely repeatedly close trip phenomenon.In the present invention, because optocoupler U4 is output as high level pulse signal, after closing pulse lost efficacy, transistor VT1 turns off because grid bears negative voltage, ensureing when closing pulse is effective, chopper can only operate combined floodgate once, effectively prevents chopper because of the former resulting jump phenomena of body.
When breaker open operation position, if switching signal test point HX and sub-gate signal test point FX has voltage, (reclosing command and separating brake instruction exist simultaneously, i.e. opening and closing state), power supply+KW is through resistance R1, R2 forms loop, optocoupler U1 turns on, so 3 feet of optocoupler U1 are output as high level, source resistance R5, R6 forms loop, optocoupler U2 turns on, so 4 feet of optocoupler U2 are output as low level, A point voltage is output as low level (low level does not send closing pulse and generates instruction), the Q end of trigger U3 is output as low level (not generating closing pulse), optocoupler U4 is output as low level, transistor VT1 is off state, chopper can not carry out closing operation, fundamentally prevent repeatedly " close-point " phenomenon of chopper.
When chopper is at closing position, time by mistake by opening button, i.e. switching signal test point HX no-voltage, sub-gate signal test point FX has voltage, and (reclosing command is absent from and separating brake instruction exists, i.e. gate-dividing state), optocoupler U1 ends, so 3 feet of optocoupler U1 are output as low level, power supply is through resistance R5, R6 forms loop, optocoupler U2 turns on, so 4 feet of optocoupler U2 are output as low level, A point voltage is output as low level (low level does not send closing pulse and generates instruction), the Q end of trigger U3 is output as low level, optocoupler U4 is output as low level (not generating closing pulse), transistor VT1 is off state, chopper can not carry out closing operation.
When chopper carries out sub-switching operation (only separating brake instruction), combined floodgate holding contact TBJ Guan Bi in breaker operation cabinet, power supply+KM forms loop through auxiliary contacts of circuit breaker QF2, switching winding TQ, and breaker open operation coil TQ is energized, and carries out sub-switching operation.After separating brake puts in place, auxiliary switch for circuit breaker QF contact disconnects, and cuts off switching winding loop.
Additionally, resistance R12 is arranged for chopper jumps position supervision, because transistor VT1 resistance between C pole and E pole when being not turned on is infinity, jump position relay to be failure to actuate, can not correctly reflect closing circuit situation, for the indirect resistance R12 of this C pole at VT1 Yu E pole, resistance value is 15k Ω.Chopper is when open position, power supply forms loop through jumping position relay TWJ coil, circuit-breaker testing switch S8 or operating position switch S9, auxiliary contacts of circuit breaker QF1, resistance R12, breaker closing coil HQ, jump position relay TWJ action, represent that closing circuit is normal.For preventing resistance R1, R2 and jumping position relay TWJ from forming parasitic loop, cause jumping position relay TWJ misoperation, R1 value is 22k Ω, R2 is 2.2 Ω, jump position relay TWJ resistance and be generally 40k Ω, the electric current in this loop is 220/64.2=3.4mA, and optocoupler U1 ends, and relay TWJ coil will not action.In sub-gate circuit, the value of R5, R6 is consistent with R1, R2.
Based on the breaker control system that the invention described above embodiment provides, the embodiment of the present invention additionally provides a kind of breaker control method, and the method is applied to breaker control system disclosed in above-described embodiment, and with reference to Fig. 5, the method may include steps of:
Step S500, identification circuit 100 have nil case according to reclosing command and separating brake instruction, it is determined that current command status, and when current command status is "on" position, generates closing pulse and generate instruction；
Wherein, command status includes "on" position, gate-dividing state, on/off switch state or without mode of operation.
Step S501, closing pulse generative circuit 101, when detecting that closing pulse generates instruction, generate closing pulse.
Step S502, shutting-brake control switch 102, when closing pulse being detected, connects closing coil HQ and power supply, so that closing coil HQ completes closing operation.
It should be noted that each embodiment in this specification all adopts the mode gone forward one by one to describe, what each embodiment stressed is the difference with other embodiments, between each embodiment identical similar part mutually referring to.For method class embodiment, due to itself and embodiment of the method basic simlarity, so describing fairly simple, relevant part illustrates referring to the part of embodiment of the method.
Above a kind of breaker control system provided by the present invention and method are described in detail.Principles of the invention and embodiment are set forth by specific case used herein, and the explanation of above example is only intended to help to understand method and the core concept thereof of the present invention.It should be pointed out that, for those skilled in the art, under the premise without departing from the principles of the invention, it is also possible to the present invention carries out some improvement and modification, these improve and modify in the protection domain also falling into the claims in the present invention.
Claims (10)
1. a breaker control system, it is characterised in that including: identification circuit, closing pulse generative circuit, closing coil, power supply and control described closing coil and described power on whether shutting-brake control switch；Wherein:
Described identification circuit is for having nil case according to reclosing command and separating brake instruction, it is determined that current command status, and when described current command status is "on" position, generates closing pulse and generate instruction；Wherein, described command status includes "on" position, gate-dividing state, on/off switch state or without mode of operation；
Described closing pulse generative circuit is for when detecting that described closing pulse generates instruction, generating closing pulse；
Described shutting-brake control switch is for when described closing pulse being detected, connecting described closing coil and described power supply, so that described closing coil completes closing operation.
2. the system as claimed in claim 1, it is characterised in that described identification circuit includes reclosing command detection electronic circuit, separating brake command detection electronic circuit and the identification electronic circuit being all connected with described reclosing command detection electronic circuit and described separating brake command detection electronic circuit；
Described reclosing command detection electronic circuit is used for detecting described reclosing command；
Described separating brake command detection electronic circuit is used for detecting described separating brake instruction；
According to described reclosing command, described identification electronic circuit is for detecting whether electronic circuit detects described reclosing command and according to whether described separating brake command detection electronic circuit detects described separating brake instruction, determine described current command status, and when described current command status is "on" position, generates described closing pulse and generate instruction.
3. system as claimed in claim 2, it is characterised in that described reclosing command detection electronic circuit includes reclosing command sampling resistor and combined floodgate photo-coupler；Described separating brake command detection electronic circuit includes separating brake instruction sampling resistor and separating brake photo-coupler；Described identification electronic circuit includes combined floodgate diode and separating brake diode；
The signal of telecommunication of the described reclosing command of one end sampling of described reclosing command sampling resistor, another terminates the electrode input end of described combined floodgate pipe bonder；The negative input of described combined floodgate photo-coupler connects the negative pole of described power supply, and emitter-base bandgap grading output terminates the negative electrode of described combined floodgate diode；
The signal of telecommunication of one end described separating brake instruction of sampling of described separating brake instruction sampling resistor, another terminates the electrode input end of described separating brake pipe bonder；The negative input of described separating brake photo-coupler connects the negative pole of described power supply, and emitter-base bandgap grading output terminates the negative electrode of described separating brake diode；
The common port of the anode of described combined floodgate diode and the anode of described separating brake diode is as the outfan of described identification electronic circuit.
4. system as claimed in claim 3, it is characterised in that described closing pulse generative circuit includes scintilla circuit and monostable flipflop；
The input of described scintilla circuit terminates the outfan of described identification electronic circuit, and output terminates the clock port of described monostable flipflop, and the positive pulse output of described monostable flipflop terminates described shutting-brake control switch.
5. the system as described in Claims 1-4 any one, it is characterised in that described shutting-brake control switch is insulated gate bipolar transistor；
The grid of described insulated gate bipolar transistor connects described closing pulse generative circuit, emitter-base bandgap grading connects one end of described closing coil and colelctor electrode connects the positive pole of described power supply；
The negative pole of another described power supply of termination of described closing coil.
6. system as claimed in claim 5, it is characterised in that also include:
It is connected to the optocoupler trigger between the grid of described insulated gate bipolar transistor and described closing pulse generative circuit.
7. system as claimed in claim 5, it is characterised in that also include:
The reclosing command generative circuit being all connected with described identification circuit and separating brake command generating circuit；
Described reclosing command generative circuit for generating described reclosing command when combined floodgate demand being detected；Described separating brake command generating circuit for generating described separating brake instruction when separating brake demand being detected.
8. system as claimed in claim 7, it is characterised in that described reclosing command generative circuit is combined floodgate holding contact, and one end of described combined floodgate holding contact is connected with the positive pole of described power supply, and the other end is connected with described identification circuit；
Separating brake command generating circuit is separating brake holding contact, and one end of described separating brake holding contact is connected with the positive pole of described power supply, and the other end is connected with described identification circuit.
9. system as claimed in claim 8, it is characterised in that also include:
Jump position monitor resistance and jump position relay；
Described jumping position monitors that the one of resistance terminates the colelctor electrode of described insulated gate bipolar transistor, and another terminates the emitter-base bandgap grading of described insulated gate bipolar transistor；
Described jumping position relay is parallel to described combined floodgate holding contact.
10. a breaker control method, it is characterized in that, being applied to breaker control system, described breaker control system includes identification circuit, closing pulse generative circuit, closing coil, power supply and controls described closing coil and described power on whether shutting-brake control switch；
The method includes:
Described identification circuit has nil case according to reclosing command and separating brake instruction, it is determined that current command status, and when described current command status is "on" position, generates closing pulse and generate instruction；Wherein, described command status includes "on" position, gate-dividing state, on/off switch state or without mode of operation；
Described closing pulse generative circuit, when detecting that described closing pulse generates instruction, generates closing pulse；
Described shutting-brake control switchs when described closing pulse being detected, connects described closing coil and described power supply, so that described closing coil completes closing operation.
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| CN108319321A (en) * | 2018-02-24 | 2018-07-24 | 河南华盛隆源电气有限公司 | Breaker start pulse signal output control method, device and circuit breaker system |
| CN113237678A (en) * | 2021-04-16 | 2021-08-10 | 德基申（厦门）电气有限公司 | Method and equipment for testing mechanical function of circuit breaker |
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| CN105788983B (en) | 2018-03-13 |
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