CN208241308U - A kind of arc light protecting system - Google Patents
A kind of arc light protecting system Download PDFInfo
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- CN208241308U CN208241308U CN201820885893.6U CN201820885893U CN208241308U CN 208241308 U CN208241308 U CN 208241308U CN 201820885893 U CN201820885893 U CN 201820885893U CN 208241308 U CN208241308 U CN 208241308U
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- arc light
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Abstract
The utility model provides a kind of arc light protecting system, includes main control unit, protection for feed line unit, arc light acquisition unit, current sensor, several arc probes；The output of each arc probe is connected with the input of arc light acquisition unit and/or protection for feed line unit respectively；The output of arc light acquisition unit, current sensor is connected with main control unit；The output of protection for feed line unit is connected with the breaking coil that arc probe acquisition unit is correspondingly connected with breaker；The arc light acquisition unit and/or protection for feed line unit include arc probe connecting pin, control unit, linear amplifier circuit, analog to digital conversion circuit, shift register mould group, numerical value comparison circuit, d type flip flop, D/A converting circuit, square wave generation circuit, digital monostable flipflop, driving circuit, power supply unit and output connector；The utility model carries out continuing to monitor using arc probe to the arc light firing condition a little that breaks down.
Description
Technical field
The utility model relates to power protection systems, and in particular to a kind of arc light protecting system.
Background technique
In China, in, in low-voltage bus bar short trouble, the injury of emphasis equipment and personnel is mainly caused by arclight；And I
Most of middle voltage bus bars of state are not provided with quick bus protection, and after only using simple arc-extinction device and transformer
Standby protection, these protections combine breaker to carry out power-off measure after generalling use the judgement of arc photosensor via controller, due to arc
Optical sensor luminosity with higher itself is sensitive, is considered that completing protection makees after completing power-off measure under normal circumstances
With in fact after arc light generates, there are hidden danger on fire for fault point, if being detected with temperature sensor, there is detection
The setting position problems and temperature lag problem of point, cannot find flame in time and carry out respective handling；It could even be possible to causing
Related accident, impact transformer are once run, and influence the operational safety of entire power grid.In order to solve this problem, it is necessary into
Row further investigation.
Utility model content
For the deficiency in the presence of the prior art, the utility model provides a kind of arc light protecting system, and purpose exists
In solving after the completion of power-off protection, the arc light firing condition a little that breaks down is carried out continuing to monitor using arc probe.
To achieve the above object, the utility model uses the following technical solution:
A kind of arc light protecting system, if comprising main control unit, protection for feed line unit, arc light acquisition unit, current sensor,
Dry arc probe；The output of each arc probe is connected with the input of arc light acquisition unit and/or protection for feed line unit respectively；Arc light
The output of acquisition unit, current sensor is connected with main control unit；The output of protection for feed line unit and arc probe acquisition unit
The breaking coil for being correspondingly connected with breaker is connected；The arc light acquisition unit and/or protection for feed line unit connect comprising arc probe
End and control unit are connect, the arc probe connecting pin is connected with control unit；The arc light acquisition unit and/or protection for feed line
Unit also includes linear amplifier circuit, analog to digital conversion circuit, shift register mould group, numerical value comparison circuit, d type flip flop, digital-to-analogue
Conversion circuit, square wave generation circuit, digital monostable flipflop, driving circuit, power supply unit and output connector；The arc light
Probe connecting pin connect with arc probe, after the linear amplifying circuit of the output of arc probe connecting pin, analog to digital conversion circuit and
The input of shift register mould group is connected, and the shift register mould group includes multiple shift registers, the number of shift register
It is identical to measure digit corresponding with analog to digital conversion circuit, and its of the input terminal of any shift register and analog to digital conversion circuit
Middle one-bit digital signal output end is uniquely corresponding to be connected；The triggering end side of the being connected to wave generation circuit of each shift register it is defeated
Outlet；First output end and second output end that each shift register includes, first output of each shift register
Hold the position rank sequence according to its connected analog to digital conversion circuit digital signal output end, the first input end phase with digital comparator
Even, the second output end of each shift register is suitable according to the position rank of its connected analog to digital conversion circuit digital signal output end
Sequence is connected with the second input terminal of digital comparator；First output end of each shift register turns according to its connected modulus
The position rank sequence for changing circuit digital signal output end, is connected with the input terminal of D/A converting circuit；The output of D/A converting circuit
End is connected with the input of d type flip flop, and the triggering end of d type flip flop is connected with the output end of digital monostable flipflop；Number is monostable
The triggering end of state trigger is connected with the output of numerical value comparison circuit；The output end of the d type flip flop through overdrive circuit with it is defeated
Connecting pin is connected out；The output connector and external control system or fire extinguishing triggering system are electrically connected；Said supply unit
It respectively corresponds and control unit, linear amplifier circuit, analog to digital conversion circuit, shift register mould group, square wave generation circuit, numerical value
Comparison circuit, d type flip flop, driving circuit, D/A converting circuit, the feeder ear of digital monostable flipflop are connected, to provide it
Required electricity consumption；The d type flip flop is the d type flip flop of failing edge triggering.
Using arc probe to the sensibility of light, the light source generated to either arc light or flame changes the utility model
It is detected；The signal that arc probe obtains enters arc light acquisition unit or protection for feed line unit by arc probe connecting pin,
Traditional structure is input to the control unit of arc light acquisition unit or protection for feed line unit after signal processing；But it is only used as powering off
The size judgement of trigger signal is handled；The utility model is more electric by analog to digital conversion circuit, shift register mould group, numerical value
The setting on road, d type flip flop, the number under the triggering of square wave generation circuit, to the adjacent moment stored in shift register mould group
According to judgement is compared, i.e., arc probe signal is subjected to displacement storage by analog-to-digital conversion under the triggering state of square wave, by
In the connection type of shift register mould group and numerical value comparison circuit, so that numerical value comparison circuit turns the modulus of adjacent storage
It changes data to be compared, under normal condition, due to not having arc light, then the output of numerical value comparison circuit is zero.When arc light or
After flame occurs, then one of input of numerical value comparison circuit is had by no change, therefore will generate a non-zero output, and trigger
Digital monostable flipflop, digital monostable flipflop generates a delay pulse, and is output to the triggering end of d type flip flop；Just
In normal situation, the time interval after delay pulse, all automatic distinguishing, the input terminal of d type flip flop have been adopted for arc light or flame
The signal collected should be 0；If the collected signal of the input terminal of d type flip flop is 1, by D but at this time still with the presence of flame
Trigger continues to touch main control unit, external control system or fire extinguishing system by driving circuit, output connector after saving
Hair or fire extinguishing driving；Compared to the power down function for only relying only on main control unit realization now, the utility model has flexible system
Connection type, it is expansible to be connect with external fire extinguishing system.
Detailed description of the invention
Fig. 1 is the logic diagram of circuit of the utility model.
Fig. 2 is that analog to digital conversion circuit to the connecting pin of numerical value comparison circuit matches schematic diagram in embodiment.
Fig. 3 is the connection schematic diagram of arc light protecting system in embodiment.
Specific embodiment
The technical solution in the utility model is further illustrated with reference to the accompanying drawings and embodiments.
A kind of arc light protecting system, as shown in figure 3, including the first main control unit U1, the second main control unit U2, protection for feed line
Unit U3-U6, arc light acquisition unit T1, current sensor S1, S2, several arc probes 100；Each arc probe 100 is installed on
The junction of electrical component in the bus-bar room of switchgear, feeder cabinet or outgoing line cabinet；The output of each arc probe 100 respectively with arc light
The input of acquisition unit T1, protection for feed line unit U3-U6 are connected；The output of protection for feed line unit and arc probe acquisition unit pair
The breaking coil that breaker should be connected is connected；The arc light acquisition unit and/or protection for feed line unit are connected comprising arc probe
End and control unit, the arc probe connecting pin are connected with control unit；As shown in Figure 1, the arc light acquisition unit and/or
Protection for feed line unit also includes linear amplifier circuit, analog to digital conversion circuit, shift register mould group, numerical value comparison circuit, D triggering
Device, D/A converting circuit, square wave generation circuit, digital monostable flipflop, driving circuit, power supply unit, communication unit with it is defeated
Connecting pin out；The arc probe connecting pin is connect with arc probe, the linear amplifying circuit of the output of arc probe connecting pin,
It is connected after analog to digital conversion circuit with the input of shift register mould group, the shift register mould group includes multiple shift LDs
Device, the quantity of shift register digit corresponding with analog to digital conversion circuit is identical, and the input terminal of any shift register
It is uniquely corresponding connected with the wherein one-bit digital signal output end of analog to digital conversion circuit；The shift register mould group includes more
A shift register is 2 bit shift registers；The output of the triggering end side of the being connected to wave generation circuit of each shift register
End；First output end and second output end that each shift register includes, first output end of each shift register
First input end phase according to the position rank sequence of its connected analog to digital conversion circuit digital signal output end, with digital comparator
Even, the second output end of each shift register is suitable according to the position rank of its connected analog to digital conversion circuit digital signal output end
Sequence is connected with the second input terminal of digital comparator；First output end of each shift register turns according to its connected modulus
The position rank sequence for changing circuit digital signal output end, is connected with the input terminal of D/A converting circuit；I.e. as shown in Fig. 2, modulus turns
It changes in circuit, the output end of any digital signal combines small English alphabet a~h to represent with number, arranges according to the sequence of a~h
Column, are input in shift register mould group, each shift register (the dashed box range content institute in Fig. 2 in shift register mould group
Show) it is arranged with a~h sequence, the signal of deposit is distinguished with number；And the A data input pin in numerical value comparison circuit and displacement
1a~1h signal output end is connected in register mould group, B data input terminal and shift register mould group in data comparison circuit
In 2a~2h signal output end be connected.The output end of D/A converting circuit is connected with the input of d type flip flop, the touching of d type flip flop
It starts and is connected with the output end of digital monostable flipflop；The triggering end of digital monostable flipflop is defeated with numerical value comparison circuit
It is connected out；The output end of the d type flip flop is connected through overdrive circuit with output connector；The output connector and external control
System processed or fire extinguishing triggering system are electrically connected；Said supply unit respectively corresponds and control unit, linear amplifier circuit, modulus
Conversion circuit, shift register mould group, square wave generation circuit, communication unit, numerical value comparison circuit, d type flip flop, driving circuit,
D/A converting circuit, the feeder ear of digital monostable flipflop are connected, to provide electricity consumption needed for it；The d type flip flop is decline
, can be from JK flip-flop change along the d type flip flop of triggering, this part is the prior art, and specific connection type does not repeat.Under
Drop is effectively utilized the pulse signal of digital monostable flipflop along the d type flip flop of triggering, so that confirmation have passed through pulse duration
Delay after carry out reading data again, ensure that the accuracy of reading data.On the other hand, D/A converting circuit is by will be digital
Signals revivification is analog signal, and long number information data has been integrated into single-ended analog signal, in conjunction with the number electricity of d type flip flop
Road turn threshold voltage realizes voltage logic judgement.If the parameter designing of linear amplifier circuit is difficult to meet the correspondence of d type flip flop
Threshold voltage requirements then can connect divider at simulation output end or amplifier circuit is designed adjustment.
The communication unit and control unit communicate to connect, the output of control unit and output, the driving circuit of d type flip flop
Input be connected in parallel.By communication unit, the utility model can be connect with external piloting control system communication, obtained higher level and controlled system
System information, and correspondence is output to driving unit output end and is acted.
It is described number monostable flipflop include chip SN74160, SN74161, SN74S162, SN74S163 in wherein
One kind, although this is counting chip, its monostable flipflop connected is the prior art in universities and colleges' Course Exercise, herein not
It repeats, connected monostable flipflop circuit is that signal rising edge is effective, is suitble to used in the technical program.The numerical value compares
The digit of circuit is no less than the output digit of analog to digital conversion circuit or the number of shift register.The numerical value comparison circuit includes
Four figures value comparator or eight-digit number value comparator.Using linear amplifier circuit, in conjunction with lower accuracy analog to digital conversion circuit with
Corresponding numerical value comparison circuit helps to improve the fault-tolerance of circuit.It is such as corresponding 8 analog to digital conversion circuits of 12V power supply, then minimum
Resolution voltage is 0.047V (12V/256), the higher jump differentiated voltage setting and help avoid bounce due to flame, voltage
It is dynamic to influence, avoid control terminal too sensitive, output error fire extinguishing signal of constantly beating.
The shift register mould group, numerical value comparison circuit, d type flip flop, one or more in digital monostable flipflop
A includes CPLD chip.It, can be by shift register mould group, numeric ratio since the integrated level and circuit design flexibility of CPLD are higher
It is designed in CPLD compared with circuit, d type flip flop, digital monostable flipflop.Said supply unit includes rechargeable battery, switch
One of which in power module, super capacitor.
It should be noted that needing to set after arc probe connecting pin for the arc probe of not set electric signal conversion
Photoelectric conversion unit is set, is exported by photoelectric conversion unit to linear amplifier circuit；It is exported again by linear amplifier circuit single to control
Member is connected with the input of analog to digital conversion circuit.
Finally, it is stated that above embodiments are merely intended for describing the technical solutions of the present application, but not for limiting the present application, although ginseng
The utility model is described in detail according to preferred embodiment, those skilled in the art should understand that, it can be to this
The technical solution of utility model is modified or replaced equivalently, without departing from the objective and model of technical solutions of the utility model
It encloses, should all cover in the scope of the claims of the utility model.
Claims (8)
1. a kind of arc light protecting system, comprising main control unit, protection for feed line unit, arc light acquisition unit, current sensor, several
Arc probe；The output of each arc probe is connected with the input of arc light acquisition unit and/or protection for feed line unit respectively；Arc light is adopted
The output of collection unit, current sensor is connected with main control unit；The output of protection for feed line unit and arc probe acquisition unit pair
The breaking coil that breaker should be connected is connected；The arc light acquisition unit and/or protection for feed line unit are connected comprising arc probe
End and control unit, the arc probe connecting pin are connected with control unit；It is characterized by: the arc light acquisition unit and/
Or protection for feed line unit also includes linear amplifier circuit, analog to digital conversion circuit, shift register mould group, numerical value comparison circuit, D touching
Device, D/A converting circuit, square wave generation circuit, digital monostable flipflop, driving circuit, power supply unit and output is sent out to connect
End；The arc probe connecting pin is connect with arc probe, and the linear amplifying circuit of the output of arc probe connecting pin, modulus turn
It is connected after changing circuit with the input of shift register mould group, the shift register mould group includes multiple shift registers, displacement
The quantity of register digit corresponding with analog to digital conversion circuit is identical, and the input terminal of any shift register and modulus turn
The wherein one-bit digital signal output end for changing circuit is uniquely corresponding connected；The triggering end of each shift register is connected to square wave hair
The output end of raw circuit；First output end and second output end that each shift register includes, each shift register
First output end according to its connected analog to digital conversion circuit digital signal output end position rank sequence, with digital comparator the
One input terminal is connected, and the second output end of each shift register is according to its connected analog to digital conversion circuit digital signal output end
Position rank sequence, be connected with the second input terminal of digital comparator；First output end of each shift register is according to its company
The position rank sequence for connecing analog to digital conversion circuit digital signal output end, is connected with the input terminal of D/A converting circuit；Digital-to-analogue conversion electricity
The output end on road is connected with the input of d type flip flop, and the triggering end of d type flip flop is connected with the output end of digital monostable flipflop；
The triggering end of digital monostable flipflop is connected with the output of numerical value comparison circuit；The output end of the d type flip flop is through overdriving
Circuit is connected with output connector；The output connector and external control system or fire extinguishing triggering system are electrically connected；It is described
Power supply unit is respectively corresponded to be occurred with control unit, linear amplifier circuit, analog to digital conversion circuit, shift register mould group, square wave
Circuit, numerical value comparison circuit, d type flip flop, driving circuit, D/A converting circuit, the feeder ear of digital monostable flipflop are connected,
To provide electricity consumption needed for it；The d type flip flop is the d type flip flop of failing edge triggering.
2. a kind of arc light protecting system as described in claim 1, it is characterised in that: the shift register mould group includes more
A shift register is 2 bit shift registers.
3. a kind of arc light protecting system as claimed in claim 1 or 2, it is characterised in that: the number monostable flipflop packet
One of which in the core of trigger containing monolithic SN74160, SN74161, SN74S162, SN74S163.
4. a kind of arc light protecting system as claimed in claim 1 or 2, it is characterised in that: the digit of the numerical value comparison circuit
No less than the output digit of analog to digital conversion circuit or the number of shift register.
5. a kind of arc light protecting system as claimed in claim 4, it is characterised in that: the numerical value comparison circuit includes four figures
It is worth comparator or eight-digit number value comparator.
6. a kind of arc light protecting system as claimed in claim 1 or 2, it is characterised in that: the shift register mould group, numerical value
One or more of comparison circuit, d type flip flop, digital monostable flipflop include CPLD chip.
7. a kind of arc light protecting system as described in claim 1, it is characterised in that: said supply unit includes chargeable electricity
Pond, switch power module, the one of which in super capacitor.
8. a kind of arc light protecting system as described in claim 1, it is characterised in that: also include communication unit；The communication unit
Member is communicated to connect with control unit, and the output of control unit and the output of d type flip flop, the input of driving circuit are connected in parallel.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820885893.6U CN208241308U (en) | 2018-06-06 | 2018-06-06 | A kind of arc light protecting system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201820885893.6U CN208241308U (en) | 2018-06-06 | 2018-06-06 | A kind of arc light protecting system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN208241308U true CN208241308U (en) | 2018-12-14 |
Family
ID=64575532
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201820885893.6U Active CN208241308U (en) | 2018-06-06 | 2018-06-06 | A kind of arc light protecting system |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN208241308U (en) |
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2018
- 2018-06-06 CN CN201820885893.6U patent/CN208241308U/en active Active
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