CN110350817A - Pulse generating circuit - Google Patents
Pulse generating circuit Download PDFInfo
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- CN110350817A CN110350817A CN201910446945.9A CN201910446945A CN110350817A CN 110350817 A CN110350817 A CN 110350817A CN 201910446945 A CN201910446945 A CN 201910446945A CN 110350817 A CN110350817 A CN 110350817A
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- 239000003990 capacitor Substances 0.000 claims abstract description 52
- 238000012544 monitoring process Methods 0.000 claims abstract description 25
- 230000001360 synchronised effect Effects 0.000 claims description 15
- 239000003381 stabilizer Substances 0.000 claims description 11
- 238000010521 absorption reaction Methods 0.000 claims description 6
- 230000010355 oscillation Effects 0.000 claims description 6
- 238000006243 chemical reaction Methods 0.000 abstract description 5
- 230000005611 electricity Effects 0.000 description 15
- 238000010586 diagram Methods 0.000 description 8
- 238000001514 detection method Methods 0.000 description 7
- 230000001052 transient effect Effects 0.000 description 4
- WHXSMMKQMYFTQS-UHFFFAOYSA-N Lithium Chemical group [Li] WHXSMMKQMYFTQS-UHFFFAOYSA-N 0.000 description 3
- 230000006870 function Effects 0.000 description 3
- 238000009413 insulation Methods 0.000 description 3
- 229910052744 lithium Inorganic materials 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 238000004804 winding Methods 0.000 description 3
- 230000009471 action Effects 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 230000008569 process Effects 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000000630 rising effect Effects 0.000 description 2
- 238000002679 ablation Methods 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000013461 design Methods 0.000 description 1
- 238000007599 discharging Methods 0.000 description 1
- 238000010891 electric arc Methods 0.000 description 1
- 238000010892 electric spark Methods 0.000 description 1
- 238000005868 electrolysis reaction Methods 0.000 description 1
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- 230000001939 inductive effect Effects 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 230000004048 modification Effects 0.000 description 1
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- 230000001681 protective effect Effects 0.000 description 1
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Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/005—Calibrating; Standards or reference devices, e.g. voltage or resistance standards, "golden" references
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- H—ELECTRICITY
- H03—ELECTRONIC CIRCUITRY
- H03K—PULSE TECHNIQUE
- H03K3/00—Circuits for generating electric pulses; Monostable, bistable or multistable circuits
- H03K3/02—Generators characterised by the type of circuit or by the means used for producing pulses
- H03K3/53—Generators characterised by the type of circuit or by the means used for producing pulses by the use of an energy-accumulating element discharged through the load by a switching device controlled by an external signal and not incorporating positive feedback
- H03K3/57—Generators characterised by the type of circuit or by the means used for producing pulses by the use of an energy-accumulating element discharged through the load by a switching device controlled by an external signal and not incorporating positive feedback the switching device being a semiconductor device
Abstract
The present invention relates to a kind of pulse generating circuits, partial discharge monitoring system check applied to switchgear, the circuit includes: boost module, multi-harmonic-oscillations module and high-speed relay, control switch, diode D6 and capacitor C1, the connection of the control terminal of multi-harmonic-oscillations module and control switch, the driving coil of high-speed relay is grounded by control switch, boost module, the driving coil and multi-harmonic-oscillations module of high-speed relay are separately connected power supply, boost module is connected by the first contact of diode D6 and high-speed relay, first contact of high-speed relay is grounded by capacitor C1, the common end of high-speed relay is used for output pulse signal, multi-harmonic-oscillations module is by DC conversion at pulse signal, with the driving coil work of fixed frequency driving high-speed relay, so that the movable contact of high-speed relay with certain frequency into Row orderly switching, generates subnanosecond grade pulse signal, shelf depreciation is simulated, in order to which partial discharge monitoring system is verified.
Description
Technical field
The present invention relates to technical field of electric equipment, more particularly to pulse generating circuit.
Background technique
Switchgear is generated electricity, is transmitted electricity in the power system, during the conversion of distribution and electric energy, and folding, control are played
The effect of system and protection electrical equipment, critical facility of the switchgear as connection power grid and power consumer, safe and stable operation
It is of great significance to power supply reliability is improved.Since switchgear is in terms of design, manufacture, installation and operation
There are still different degrees of problems, and switchgear is caused to there is the hidden danger that dielectric breakdown accident occurs at runtime.Therefore, in order to
It improves to state of insulation perception in switchgear operational process, finds that switchgear whether there is latency insulation defect in time；It is logical
It is monitored on-line frequently with the state of insulation of superfrequency, transient earth voltage and ultrasonic wave partial discharge monitoring system to switchgear.
In order to ensure partial discharge monitoring system is during long-play, the validity and reliability of monitoring data,
It needs periodically to carry out performance school to the signal processing unit of superfrequency used in system, transient earth voltage and ultrasonic sensor
It tests.Since the sensor and signal processing unit of the partial discharge monitoring system of switchgear are once installed, just it is not easy to more
Secondary disassembly, due in partial discharge of switchgear monitoring system superfrequency sensing module detection frequency be distributed in mostly 300MHz~
The detection frequency of 1500MHz, transient state low-voltage sensing module are distributed in 1MHz~100MHz, the detection of supersonic sensing module mostly
Frequency is distributed in 10kHz~100kHz mostly, and therefore, staff verifies each different partial discharge monitoring system at the scene and needs
Different signal sources is configured, partial discharge monitoring system is verified to be not easy to user, seriously affects field-checking
Efficiency.
Summary of the invention
Based on this, it is necessary to provide a kind of pulse generating circuit.
A kind of pulse generating circuit, the partial discharge monitoring system check applied to switchgear, comprising: boost module, more
Resonance oscillation module, high-speed relay LS1, control switch and capacitor C1；The input terminal of the multi-harmonic-oscillations module is for connecting
The output end of power supply, the multi-harmonic-oscillations module is connect with the control terminal of the control switch, the first end of the control switch
It is connect with the first end of the driving coil of the high-speed relay LS1, the second end of the control switch is described fast for being grounded
The second end of the driving coil of fast relay LS1 is for connecting the power supply；The input terminal of the boost module is for connecting electricity
The anode in source, the output end of the boost module and the diode D6 connect, the cathode of the diode D6 and described quick
The first contact of relay LS1 connects, and the first contact of the high-speed relay LS1 is used to be grounded by the capacitor C1, institute
The common end of high-speed relay LS1 is stated for output pulse signal.
The pulse generating circuit further includes absorption module in one of the embodiments, and the absorption module includes electricity
Hold the anode and the first end of the driving coil of the high-speed relay LS1 of C2, resistance R1 and diode D1, the diode D1
Connection, the cathode of the diode D1 pass through the drive of the capacitor C2 and the resistance R1 and the high-speed relay LS1 respectively
The second end of moving winding connects.
The pulse generating circuit further includes voltage regulator module in one of the embodiments, and the voltage adjusts mould
The input terminal of block is connect with the output end of the boost module, and the output end of the voltage regulator module is with the diode D6's
Anode connection.
The voltage regulator module includes adjustable resistance RP1, resistance R2, resistance R3 and fortune in one of the embodiments,
Follower U4 is put, the first end of the adjustable resistance RP1 is connect by the resistance R2 with the output end of the boost module, institute
The second end for stating adjustable resistance RP1 is used to be grounded by the resistance R3, the adjustable side of the adjustable resistance RP1 and the amplifier
The normal phase input end of follower U4 connects, and the output end of the amplifier follower is connect with the anode of the diode D6.
The pulse generating circuit further includes voltage display module in one of the embodiments, and the voltage shows mould
Block is connect with the output end of the voltage regulator module.
The pulse generating circuit further includes synchronous output module in one of the embodiments, the multi-harmonic-oscillations mould
The output end of block is also connect with the input terminal of the synchronous output module, and the output end of the synchronous output module is used for and switch
The trigger device of the partial discharge monitoring system of cabinet connects.
The synchronous output module includes: monostable flipflop U3, capacitor C3 and resistance in one of the embodiments,
R4；The input terminal of the monostable flipflop U3 is connect with the output end of the multi-harmonic-oscillations module, the monostable flipflop
The external capacitor end of U3 is connect by the capacitor C3 with the external resistance terminal of the monostable flipflop U3, the monostable touching
The external resistance terminal of hair device U3 is also used to connect to power supply by the resistance R4, and the output end of the monostable flipflop U3 is used
It is connect in the trigger device of the partial discharge monitoring system with switchgear.
The multi-harmonic-oscillations module includes multivibrator, resistance R5 and capacitor C4 in one of the embodiments, described
The first input end of multivibrator is connect with the first end of the resistance R5, and the second end of the resistance R5 is described for connecting
Power supply, the second input terminal of the multivibrator are used to be grounded by the capacitor C4, the output end of the multivibrator
It is connect with the second end of the driving coil of the high-speed relay LS1.
The multi-harmonic-oscillations module further includes voltage-stabiliser tube D2, selection switch and at least two in one of the embodiments,
First resistor, the selection switch have common end and at least two first contacts, anode and the electricity of the voltage-stabiliser tube D2
The first end for hindering R5 connects power supply, and the anode of the voltage-stabiliser tube D2 is also connect with the second input terminal of the multivibrator, institute
The cathode for stating voltage-stabiliser tube D2 is connect with the common end of the selection switch, and every one first contact of the selection switch passes through an institute
First resistor is stated to connect with the first input end of the multi-harmonic-oscillations module.
The control switch is triode Q1, the base stage of the triode Q1 and described more in one of the embodiments,
The output end of resonance oscillation module connects, and the emitter of the triode Q1 is for being grounded, the collector of the triode Q1 and institute
State the first end connection of the driving coil of high-speed relay LS1.
Above-mentioned pulse generating circuit, by the way that multi-harmonic-oscillations module is arranged, by DC conversion at pulse signal, with fixation
Frequency drives the driving coil cycle operation of high-speed relay LS1, and makes the movable contact of high-speed relay LS1 with certain frequency
Rate is orderly switched；Boost module is used to increase the voltage of power supply, and by electric energy by being sent to quickly after diode D6
The first contact of relay LS1, since the movable contact of high-speed relay LS1 is orderly switched with certain frequency, so that capacitor
C1 carries out orderly charge and discharge, generates subnanosecond grade pulse signal, the signal of analog switch cabinet shelf depreciation, in order to which part is put
Pyroelectric monitor system is verified.
Detailed description of the invention
Fig. 1 is the circuit diagram of pulse generating circuit in one embodiment；
Fig. 2 is the circuit diagram of high-speed relay LS1 in one embodiment；
Fig. 3 is the circuit diagram of boost module in one embodiment；
Fig. 4 is the circuit diagram of multi-harmonic-oscillations module in one embodiment；
Fig. 5 is the circuit diagram of synchronous output module in one embodiment；
Fig. 6 is the circuit diagram of voltage regulator module in one embodiment；
Fig. 7 is the power supply circuit of battery module and the circuit diagram of charge protection in one embodiment；
Fig. 8 is the circuit diagram of under-voltage indicating module in one embodiment；
Fig. 9 is the single pulse waveform of the subnanosecond grade pulse signal of pulse generation circuit output in one embodiment.
Specific embodiment
To facilitate the understanding of the present invention, a more comprehensive description of the invention is given in the following sections with reference to the relevant attached drawings.In attached drawing
Give better embodiment of the invention.But the invention can be realized in many different forms, however it is not limited to herein
Described embodiment.On the contrary, the purpose of providing these embodiments is that making to understand more the disclosure
Add thorough and comprehensive.
Unless otherwise defined, all technical and scientific terms used herein and belong to technical field of the invention
The normally understood meaning of technical staff is identical.Term used herein is intended merely to the mesh of description specific embodiment
, it is not intended that in the limitation present invention.
For example, a kind of pulse generating circuit is provided, the partial discharge monitoring system check applied to switchgear, comprising: rise
Die block, multi-harmonic-oscillations module, high-speed relay LS1, control switch and capacitor C1, the input terminal of the multi-harmonic-oscillations module
For connecting power supply, the output end of the multi-harmonic-oscillations module is connect with the control terminal of the control switch, the control switch
First end connect with the first end of the driving coil of the high-speed relay LS1, the second end of the control switch is for connecing
Ground, the second end of the driving coil of the high-speed relay LS1 is for connecting the power supply；The input terminal of the boost module is used
Connect in the anode of connection power supply, the output end of the boost module and the diode D6, the cathode of the diode D6 and
The first contact of the high-speed relay LS1 connects, and the first contact of the high-speed relay LS1 is used to pass through the capacitor C1
The common end of ground connection, the high-speed relay LS1 is used for output pulse signal.
Above-mentioned pulse generating circuit, by the way that multi-harmonic-oscillations module is arranged, by DC conversion at pulse signal, with fixation
Frequency drives the driving coil cycle operation of high-speed relay LS1, and makes the movable contact of high-speed relay LS1 with certain frequency
Rate is orderly switched；Boost module is used to increase the voltage of power supply, and by electric energy by being sent to after diode D6 quickly
The first contact of relay LS1, since the movable contact of high-speed relay LS1 is orderly switched with certain frequency, so that capacitor
C1 carries out orderly charge and discharge, generates subnanosecond grade pulse signal, the signal of analog switch cabinet shelf depreciation, in order to which part is put
Pyroelectric monitor system is verified, and subnanosecond grade pulse signal is suitable for superfrequency, transient state low-voltage and ultrasonic wave shelf depreciation
Monitor system check.
In one of the embodiments, referring to Fig. 1, providing a kind of pulse generating circuit 10, the office applied to switchgear
Portion electric discharge monitoring system check, the pulse generating circuit 10 include: boost module 100, multi-harmonic-oscillations module 200, quickly after
Electric appliance LS1, control switch and capacitor C1；The input terminal of the multi-harmonic-oscillations module 200 is for connecting power supply, the multi-resonant
The output end for swinging module 200 is connect with the control terminal of the control switch 300, the first end of the control switch 300 with it is described
The first end of the driving coil of high-speed relay LS1 connects, and the second end of the control switch 300 is described quick for being grounded
The second end of the driving coil of relay LS1 is for connecting the power supply；The input terminal of the boost module 100 is for connecting electricity
The anode in source, the output end of the boost module 100 and the diode D6 connect, the cathode of the diode D6 and it is described fastly
The first contact of fast relay LS1 connects, and the first contact of the high-speed relay LS1 is used to be grounded by the capacitor C1,
The common end of the high-speed relay LS1 is used for output pulse signal.
Boost module is a kind of circuit module that voltage value can be increased to certain value, specifically, by the electricity of direct current
Pressure value is increased to certain value, and in the present embodiment, boost module is used to the voltage of power supply be increased to 100V, it is possible to understand that, fastly
The amplitude of the subnanosecond grade pulse of fast relay LS1 output, i.e., the voltage value of the pulse of subnanosecond grade is with high-speed relay LS1's
The received voltage swing in first contact is related, and the output end of boost module passes through the first of diode D6 and high-speed relay LS1
Contact connection, in this way, even if pulse generating circuit connects low-tension supply, the high Asia of the amplitude that pulse generating circuit also can produce
Nanosecond pulse is verified with being suitable for the partial discharge monitoring system of switchgear.
Specifically, multi-harmonic-oscillations module includes multivibrator, the multivibrator is for exporting square wave, thus with one
The conducting and disconnection of first end and second end that fixed frequency is switched with drive control, so with certain frequency driving quickly after
The driving coil of electric appliance LS1, so that the movable contact of high-speed relay LS1 is orderly switched with certain frequency, so that electric
Hold C1 and carry out orderly charging and discharging, to generate subnanosecond grade pulse signal.
It should be understood that high-speed relay LS1 have driving coil and contact sets, the contact sets include the first contact and
Common end, the driving coil of high-speed relay LS1 is used to driving being switched on or off for the first contact and common end, in a reality
It applies in example, the electric shock group of the high-speed relay LS1 further includes the second contact, and the second contact of the high-speed relay LS1 is used
In ground connection.Specifically, high-speed relay LS1 is one of relay, contact sets have the characteristics that pickup time is fast, i.e., after
The short feature of the action delay of electric appliance, by the way that high-speed relay LS1 is arranged.So that the driving coil of high-speed relay LS1
The pulse drive signal that can be issued according to multi-harmonic-oscillations module controls first contact and common end of high-speed relay LS1
It is switched on or off, to carry out orderly charge and discharge to capacitor C1, to generate subnanosecond grade pulse signal, and by described fast
The common end output pulse signal of fast relay LS1, in the present embodiment, the common end of the high-speed relay LS1 is for exporting
Pulse signal, i.e., the common end of the described high-speed relay LS1 is for exporting subnanosecond grade pulse signal.In one embodiment,
The pulse generating circuit has pulse signal output end, and the common end of the high-speed relay LS1 and the pulse signal are defeated
Outlet connection, in one embodiment, the common end of the high-speed relay LS1 are switch for connecting load, the load
The partial discharge monitoring system of cabinet.
Above-mentioned pulse generating circuit, by the way that multi-harmonic-oscillations module is arranged, by DC conversion at pulse signal, with fixation
Frequency drives the driving coil cycle operation of high-speed relay LS1, and makes the movable contact of high-speed relay LS1 with certain frequency
Rate is orderly switched；Boost module is used to increase the voltage of power supply, and by electric energy by being sent to after diode D6 quickly
The first contact of relay LS1, since the movable contact of high-speed relay LS1 is orderly switched with certain frequency, so that capacitor
C1 carries out orderly charge and discharge, so that subnanosecond grade pulse signal is generated, the signal of analog switch cabinet shelf depreciation, in order to office
Portion's electric discharge monitoring system is verified.
It is in one of the embodiments, referring to Fig. 1, described in order to enable high-speed relay LS1 reliably to work
Pulse generating circuit 10 further includes absorption module 500, and the absorption module 500 includes capacitor C2, resistance R1 and diode D1, institute
The anode for stating diode D1 is connect with the first end of the driving coil of the high-speed relay LS1, the cathode of the diode D1
It is connect respectively by the capacitor C2 and the resistance R1 with the second end of the driving coil of the high-speed relay LS1.Specifically
, the cathode of the diode D1 passes through the driving of the capacitor C2 and the resistance R1 and the high-speed relay LS1 respectively
The second end of coil connects, i.e., the cathode of the described diode D1 is connect with the first end of the capacitor C2, and the of the capacitor C2
Two ends are connect with the second end of the driving coil of the high-speed relay LS1, the cathode of the diode D1 and the resistance R1
First end connection, the second end of the resistance R1 connect with the second end of the driving coil of the high-speed relay LS1, can be with
Understand, due to the variation that can cause inductive load in a flash of bounce or the opening and closing of relay contact, generates gas and put
Electrical phenomena, but the electric current of relay contact on-off is smaller, is not in electric arc between contact, but will appear spark discharge, spark is put
Electricity will cause interference signal, and will also result in damage to the contact sets of high-speed relay LS1, and can reduce the use longevity of contact
Life, electric spark meeting ablation contact surface, makes the uneven surface of high-speed relay LS1 cause the failure of poor contact.Pass through setting
Resistance R1, capacitor C2 and diode D1 form RC circuit, and the both ends of RC circuit are connect with the both ends of high-speed relay LS1, so that
The energy of the driving coil electricity of high-speed relay LS1 does not pass through RC circuit by contact；Break since RC circuit only absorbs contact
The self-induced e.m.f generated when opening.Make in relay contact connection moment so that the spark of high-speed relay LS1 be fully absorbed
Obtaining high-speed relay LS1 being capable of reliably working.
In order to make output subnanosecond grade pulse amplitude it is adjustable, please refer in one of the embodiments, Fig. 2, Fig. 3 and
Fig. 6, the pulse generating circuit further include voltage regulator module 700, the input terminal of the voltage regulator module 700 with it is described
The output end of boost module 100 connects, and the output end of the voltage regulator module 700 is connect with the anode of the diode D6.
The cathode of the diode D6 is connect with the first contact of the high-speed relay LS1, and the voltage regulator module is for adjusting
The received voltage value in the first contact of the high-speed relay LS1, specifically, the input terminal of the voltage regulator module with it is described
The output end of boost module connects, the output end of voltage regulator module pass through the diode D6 and high-speed relay LS1 the
The connection of one contact, such user the voltage that boost module exports can be adjusted by control voltage regulator module, so that
The received voltage in the first contact of the high-speed relay LS1 is adjustable, due to the received electricity in the first contact of high-speed relay LS1
Pressure value is directly related with the amplitude of subnanosecond grade pulse that pulse generating circuit exports, so as to realize the subnanosecond grade of output
The amplitude of pulse is adjustable.
In order to make voltage regulator module preferably adjust voltage swing, Fig. 2, Fig. 3 are please referred in one of the embodiments,
And Fig. 6, the voltage regulator module 700 include adjustable resistance RP1, resistance R2, resistance R3 and amplifier follower U4, it is described adjustable
The first end of resistance RP1 is connect by the resistance R2 with the output end of the boost module 100, the adjustable resistance RP1's
Second end is used to be grounded by the resistance R3, the positive of the adjustable side of the adjustable resistance RP1 and the amplifier follower U4
Input terminal connection, the output end of the amplifier follower are connect with the anode of the diode D6.Specifically, adjustable by being arranged
Resistance RP1, resistance R2 and resistance R3, according to the principle of parallel connection partial pressure, by adjusting the resistance value of adjustable resistance RP1, to adjust
The received voltage of the normal phase input end of amplifier follower, amplifier follower is high with input impedance, and the characteristic that output impedance is low,
The stable voltage of output to adjust voltage regulator module, and voltage is sent to high-speed relay LS1, in order to
Family preferably adjusts voltage swing, and in one embodiment, the adjustable resistance RP1 is the adjustable resistance in potentiometer, one
In a embodiment, the potentiometer is digital regulation resistance, accurately to adjust voltage value.In the present embodiment, voltage regulator module is used
In being adjusted in 1V~100V by the 100V DC voltage of boost module is any.
For the ease of user check voltage regulator module adjust voltage value, in one of the embodiments, referring to Fig. 6,
The pulse generating circuit further includes voltage display module 710, the voltage display module 710 and the voltage regulator module
700 output end connection.By the way that voltage display module is arranged, consequently facilitating user checks the voltage of the output of voltage regulator module
Value.
In one embodiment, please refer to Fig. 2, Fig. 3 and Fig. 6, the boost module include boost chip U1, inductance L1 and
Capacitor C15, the input terminal of the boost chip by the inductance L1 for being connected to power supply, and the input terminal of boost chip U1 is also
For being grounded by the capacitor C15, the output end of the boost chip U1 is connect with the anode of the diode D6.This implementation
In example, the output end of the boost chip U1 is connect by the voltage regulator module with the anode of the diode D6, described
The cathode of diode D6 is connect with the first contact of the high-speed relay LS1.In the present embodiment, the capacitor C15 is electrolysis
The anode of capacitor, the capacitor C15 is connect with the input terminal of the boost chip U1, and the cathode of the capacitor C15 is used to be grounded,
In one embodiment, the boost module further includes capacitor C13, and the output end of the boost chip U1 is used to pass through the electricity
Hold C13 ground connection, specifically, eliminating line to the electric power incoming line filtering of boost chip input terminal by setting inductance L1 and capacitor C15
Wave and noise, the voltage that inductance C13 exports boost chip are filtered.
It is verified for the ease of partial discharge monitoring system, please refers to Fig. 4 and Fig. 5, institute in one of the embodiments,
The pulse generating circuit stated further includes synchronous output module, the output end of the multi-harmonic-oscillations module also with the synchronism output mould
The input terminal of block connects, and the output end of the synchronous output module is used for the triggering with the partial discharge monitoring system of switchgear and fills
Set connection.The synchronous output module is used to export according to while pulse generating circuit exports subnanosecond grade pulse signal
TTL (transistor transistor logic, transistor-transistor logic) level pulse, by the way that synchronism output mould is arranged
The input terminal of block, synchronous output module is connect with the output end of multi-harmonic-oscillations module, when pulse generating circuit exports subnanosecond grade
When pulse, synchronous output module synchronism output Transistor-Transistor Logic level signal is sent to the trigger device of partial discharge monitoring system, so that office
Portion's electric discharge monitoring system trigger verification operation.
In one of the embodiments, referring to Fig. 5, the synchronous output module 600 include: monostable flipflop U3,
Capacitor C3 and resistance R4；The input terminal of the monostable flipflop U3 is connect with the output end of the multi-harmonic-oscillations module, described
The external capacitor end of monostable flipflop U3 is connect by the capacitor C3 with the external resistance terminal of the monostable flipflop U3,
The external resistance terminal of the monostable flipflop U3 is also used to connect to power supply by the resistance R4, the monostable flipflop
The output end of U3 is connect with the trigger device 610 of the partial discharge monitoring system of the switchgear.In one embodiment, described
The second end of resistance R4 is also connect with the CLR pin of the monostable flipflop, specifically, only one is steady for monostable flipflop
Determine state, a temporary stable state, under the action of applying pulse, monostable flipflop can be turned to one from a stable state
Temporary stable state, the timing unit by setting capacitor C3 and resistance R4 as monostable flipflop, plays RC time delay process in circuit
Effect, which maintains a period of time to be returned to original stable state, and the time that temporary stable state maintains depends on the parameter value of RC.Cause
This, is connect by the input terminal of monostable flipflop with the output end of the multi-harmonic-oscillations module, therefore monostable flipflop can
To export a Transistor-Transistor Logic level pulse.
In order to make multi-harmonic-oscillations module output pulse signal, in one of the embodiments, referring to Fig. 4, the multi resonant
Oscillation module 200 include multivibrator U2, resistance R5 and capacitor C4, the first input end of the multivibrator U2 with it is described
The first end of resistance R5 connects, and the second end of the resistance R5 is for connecting the power supply, and the second of the multivibrator U2
Input terminal is used to be grounded by the capacitor C4, the drive of the output end of the multivibrator U2 and the high-speed relay LS1
The second end of moving winding connects.Specifically, multivibrator is to make two electronics devices by resistance-capacitance coupling using depth positive feedback
Part alternate conduction and cut-off, so that self-excitation generates the oscillator of square wave output, to export square-wave pulse signal.
Pulse signal frequency in order to realize the output of multi-harmonic-oscillations module is adjustable, please refers in one of the embodiments,
Fig. 4, the multi-harmonic-oscillations module 200 further include voltage-stabiliser tube D2, selection switch SW1 and at least two first resistors, the choosing
Switch SW1 is selected with common end and at least two first contacts, the first end of the anode and the resistance R5 of the voltage-stabiliser tube D2
The anode of connection, the voltage-stabiliser tube D2 is also connect with the second input terminal of the multivibrator U2, and the voltage-stabiliser tube D2's is negative
Pole is connect with the common end of the selection switch SW1, and every one first contact of the selection switch SW1 passes through first electricity
Resistance is connect with the first input end of the multi-harmonic-oscillations module.The resistance value of each first resistor is different, specifically, referring to Fig. 4,
In one embodiment, the first resistor is respectively resistance R16, resistance R17 and resistance R18, the first touching of the selection switch
There are three points, to control the pulse signal of multivibrator output 50Hz, 100Hz and 200Hz.It should be understood that resistance R5, electricity
Hold C4 and first resistor constitutes timing circuit, cycle of oscillation and oscillation frequency due to the pulse signal of multi-harmonic-oscillations mold output
Rate is related with the resistance value size of first resistor, i.e. the frequency of the pulse signal of multivibrator output and the resistance value of first resistor is big
It is small related, pass through setting selection switch, the gear of clearance switching switch, to adjust the first resistor for being connected to multivibrator
Resistance value, so that the pulse signal of the different frequency of multivibrator output, to realize the pulse signal of multivibrator output
Frequency is adjustable, further, since the output end of multi-harmonic-oscillations module and the driving coil of high-speed relay connect, passes through adjusting
The frequency of the pulse signal of multivibrator output, so that the repetition of the subnanosecond grade pulse signal of high-speed relay LS1 output
Frequency is adjustable.
In order to preferably enable control switch signal based on the received, by the first end and second end of control switch
It is switched on or off, please refers to Fig. 2 and Fig. 4 in one of the embodiments, the control switch 300 is triode Q1, at it
In middle one embodiment, the base stage of the triode Q1 is connect with the output end of the multi-harmonic-oscillations module 200, the triode
The emitter of Q1 is for being grounded, the first end of the driving coil of the collector of the triode Q1 and the high-speed relay LS1
Connection.Made by the way that such control switch is arranged when the base stage of triode Q1 receives the pulse signal of multi-harmonic-oscillations module
Collector and the emitter conducting for obtaining triode Q1, play the role of switch, so as to preferably enable control switch root
According to received signal, the first end of control switch and second end are turned on or off.
Fig. 2, Fig. 3, Fig. 4 and Fig. 7 are please referred in one of the embodiments, and the pulse generating circuit further includes electricity
Pond module 800, the battery module 800 are connect with the input terminal of the boost module 100, the battery module 800 with it is described
The input terminal of multi-harmonic-oscillations module 200 connects, drive of the output end of the battery module 800 also with the high-speed relay LS1
The second end of moving winding connects.In one embodiment, the battery module is lithium battery, in one embodiment, the lithium
Battery is rechargeable lithium battery, by the way that battery module is arranged, for boost module, multi-harmonic-oscillations module and high-speed relay LS1
Driving coil power supply is provided it is user-friendly so that pulse generating circuit is without additional connection power supply.
In one of the embodiments, referring to Fig. 2, Fig. 3, Fig. 4 and Fig. 7, the pulse generating circuit is also wrapped
Include switch SW2 and fuse F1, the battery module 800 by switch SW2 and fuse F1 respectively with the boost module 100
Input terminal, multi-harmonic-oscillations module 200 input terminal and high-speed relay LS1 driving coil second end connection, at one
In embodiment, the pulse generating circuit further includes filter capacitor C5, and the battery module is used to be grounded by filter capacitor C5,
Passed through by setting switch SW2 consequently facilitating whether user's control pulse generating circuit needs to generate subnanosecond grade pulse signal
It is safe that setting fuse F1 can more preferably protect circuit to use.Specifically, capacitor has the function of logical exchange resistance direct current, by setting
Filter capacitor C5 is set, the interference signal that battery module generates can be filtered out, to provide stable DC for boost module.
In one of the embodiments, referring to Fig. 7, the pulse generating circuit further includes charging protecting module 810,
The input terminal of the charging protecting module 810 is for connecting power supply, the output end and the battery of the charging protecting module 810
Module 800 connects.In one embodiment, the charge protector 810 includes: diode D3 and TVS pipe D4, two pole
The anode of pipe D3 is for connecting power supply, and the cathode of the diode D3 is connect with the battery module 800, the TVS pipe D4's
For being grounded, the cathode of the TVS pipe D4 is connect anode with the cathode of the diode D3.Specifically, diode has reversely
Protective effect, TVS pipe have the function of overvoltage protection, in this way, can prevent battery mould by the way that diode D3 and TVS pipe D4 is arranged
Block overcharges phenomenon, to preferably protect battery module.
Fig. 7 and Fig. 8 is please referred in one of the embodiments, and the pulse generating circuit further includes under-voltage detection mould
Block 910；The under-voltage detection module 910 includes voltage comparator U5 and instruction submodule 912, and the voltage comparator U5's is anti-
Phase input terminal is connect with the battery module 800, and the normal phase input end of the voltage comparator U5 is for connecting reference power supply, institute
The output end for stating voltage comparator U5 is connect with instruction submodule 912.In one embodiment, the instruction submodule 912 wraps
It includes light emitting diode D5 and triode Q2, the base stage of the triode Q2 is connect with the output end of the voltage comparator U5, institute
The anode of light emitting diode D5 is stated for connecting the power supply, the collection of the cathode of the light emitting diode D5 and the triode Q2
Electrode connection, the emitter of the triode Q2 is for being grounded.Specifically, by by the reverse phase of battery module and voltage comparator
The normal phase input end of input terminal connection, voltage comparator connects reference power supply, when the voltage value of battery module is less than reference voltage
When, the output end of voltage comparator exports high level signal, so that light-emitting diodes are connected with emitter in the collector of triode Q2
Pipe D5 is shinny, to play indicative function, reminds the electricity of user's voltage module low.
In one embodiment, the under-voltage detection module further includes resistance R25 and resistance R26, and the battery module is logical
It crosses the resistance R25 to connect with the inverting input terminal of the voltage comparator U5, the inverting input terminal of the voltage comparator U5
It is also used to be grounded by the resistance R26.A divider, which is formed, by setting resistance R25 and resistance R26 measures supply voltage,
Cell voltage is divided, avoiding cell voltage is more than the rated operational voltage of voltage comparator, promotes under-voltage detection module
Reliability.
In one embodiment, the boost module includes boost chip, the model FBR150 of the boost chip.Institute
State the model NE555 of multivibrator, first input end, that is, multivibrator DSCHG pin of the multivibrator,
The TRG pin of second input terminal multivibrator of the multivibrator, output end, that is, multivibrator of multivibrator
OUT pin.The model 74LS221 of the monostable flipflop, output end, that is, monostable touching of the monostable flipflop
Send out the B pin of device, external capacitor end, that is, monostable flipflop C pin of the monostable flipflop, the monostable trigger
The R/C pin of external resistance terminal, that is, monostable flipflop of device, output end, that is, monostable flipflop of the monostable flipflop
Q pin.
In one embodiment, pulse generating circuit can with voltage pulse output 1V~100V, repetition rate 50Hz,
100Hz and 200Hz, pulse rising edge are not higher than 0.5ns, and pulse hemiwave time is not less than 20ns.In one embodiment,
The single pulse waveform of the subnanosecond grade pulse signal of pulse generating circuit output as shown in figure 9, single pulse rising
Along being 0.45ns, hemiwave time is about 20ns.
In one embodiment, the high-speed relay LS1 can be substituted with solid-state relay.
Each technical characteristic of embodiment described above can be combined arbitrarily, for simplicity of description, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, all should be considered as described in this specification.
The embodiments described above only express several embodiments of the present invention, and the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to protection of the invention
Range.Therefore, the scope of protection of the patent of the invention shall be subject to the appended claims.
Claims (10)
1. a kind of pulse generating circuit, the partial discharge monitoring system check applied to switchgear characterized by comprising rise
Die block, multi-harmonic-oscillations module, high-speed relay LS1, control switch, diode D6 and capacitor C1；
The input terminal of the multi-harmonic-oscillations module is opened for connecting power supply, the output end of the multi-harmonic-oscillations module with the control
The control terminal of pass connects, and the first end of the control switch is connect with the first end of the driving coil of the high-speed relay LS1,
For the second end of the control switch for being grounded, the second end of the driving coil of the high-speed relay LS1 is described for connecting
Power supply；
The input terminal of the boost module is for connecting power supply, the anode of the output end of the boost module and the diode D6
Connection, the cathode of the diode D6 are connect with the first contact of the high-speed relay LS1, the high-speed relay LS1's
First contact is used to be grounded by the capacitor C1, and the common end of the high-speed relay LS1 is used for output pulse signal.
2. pulse generating circuit according to claim 1, which is characterized in that it further include absorption module, the absorption module
Anode and the driving coil of the high-speed relay LS1 including capacitor C2, resistance R1 and diode D1, the diode D1
First end connection, the cathode of the diode D1 pass through the capacitor C2 and resistance R1 and the high-speed relay respectively
The second end of the driving coil of LS1 connects.
3. pulse generating circuit according to claim 1, which is characterized in that it further include voltage regulator module, the voltage
The input terminal of adjustment module is connect with the output end of the boost module, the output end of the voltage regulator module and two pole
The anode connection of pipe D6.
4. pulse generating circuit according to claim 3, which is characterized in that the voltage regulator module includes adjustable resistance
RP1, resistance R2, resistance R3 and amplifier follower U4, the adjustable resistance RP1 first end pass through the resistance R2 and the liter
The output end of die block connects, and the second end of the adjustable resistance RP1 is used to be grounded by the resistance R3, the adjustable resistance
The adjustable side of RP1 is connect with the normal phase input end of the amplifier follower U4, the output end of the amplifier follower and described two
The anode connection of pole pipe D6.
5. pulse generating circuit according to claim 3, which is characterized in that it further include voltage display module, the voltage
Display module is connect with the output end of the voltage regulator module.
6. pulse generating circuit according to claim 1, which is characterized in that it further include synchronous output module, the multi resonant
The output end of oscillation module is also connect with the input terminal of the synchronous output module, and the output end of the synchronous output module is used for
It is connect with the trigger device of the partial discharge monitoring system of switchgear.
7. pulse generating circuit according to claim 6, which is characterized in that the synchronous output module includes: monostable
Trigger U3, capacitor C3 and resistance R4；
The input terminal of the monostable flipflop U3 is connect with the output end of the multi-harmonic-oscillations module, the monostable flipflop
The external capacitor end of U3 is connect by the capacitor C3 with the external resistance terminal of the monostable flipflop U3, the monostable touching
The external resistance terminal of hair device U3 is also used to connect to power supply by the resistance R4, and the output end of the monostable flipflop U3 is used
It is connect in the trigger device of the partial discharge monitoring system with switchgear.
8. pulse generating circuit according to claim 1, which is characterized in that the multi-harmonic-oscillations module includes multi-harmonic-oscillations
Device, resistance R5 and capacitor C4, the first input end of the multivibrator are connect with the first end of the resistance R5, the resistance
The second end of R5 is used to be grounded by the capacitor C4 for connecting the power supply, the second input terminal of the multivibrator,
The output end of the multivibrator is connect with the second end of the driving coil of the high-speed relay LS1.
9. pulse generating circuit according to claim 8, which is characterized in that the multi-harmonic-oscillations module further includes voltage-stabiliser tube
D2, selection switch and at least two first resistors, the selection switch has common end and at least two first contacts, described steady
The anode of pressure pipe D2 connect power supply with the first end of the resistance R5, the voltage-stabiliser tube D2 it is positive also with the multivibrator
The second input terminal connection, the cathode of the voltage-stabiliser tube D2 with it is described selection switch common end connect, it is described select switch
Every one first contact is connect by a first resistor with the first input end of the multi-harmonic-oscillations module.
10. pulse generating circuit according to claim 1, which is characterized in that the control switch is triode Q1, described
The base stage of triode Q1 is connect with the output end of the multi-harmonic-oscillations module, and the emitter of the triode Q1 is for being grounded, institute
The collector for stating triode Q1 is connect with the first end of the driving coil of the high-speed relay LS1.
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| CN111697871A (en) * | 2020-04-29 | 2020-09-22 | 西北核技术研究院 | Output voltage adjusting method of Tesla transformer type pulse power source |
| CN111948345A (en) * | 2020-08-11 | 2020-11-17 | 广东电网有限责任公司广州供电局 | Detection system and method of ozone sensing equipment |
| CN113595386A (en) * | 2021-07-02 | 2021-11-02 | 西安军陶科技有限公司 | Ideal diode circuit and power supply |
| CN114281014A (en) * | 2021-11-17 | 2022-04-05 | 欧尚元(天津)有限公司 | Control method and device for field device program-controlled reflux ratio |
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|---|---|
| CN110350817B (en) | 2020-08-14 |
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Inventor after: Zhang Min Inventor after: Lin Xiang Inventor after: He Jiaxing Inventor after: Wu Shangxian Inventor after: Fang Jian Inventor after: Mo Wenxiong Inventor after: Wang Hongbin Inventor after: Qin Yu Inventor after: Hao Fangzhou Inventor after: Luo Linhuan Inventor after: Chen Shenyu Inventor after: Yin Kuang Inventor before: Zhang Min Inventor before: He Jiaxing Inventor before: Fang Jian Inventor before: Mo Wenxiong Inventor before: Wang Hongbin Inventor before: Qin Yu Inventor before: Hao Fangzhou Inventor before: Luo Linhuan Inventor before: Yin Kuang Inventor before: Lin Xiang |
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Effective date of registration: 20210219 Address after: 510620, No. two, No. 2, Tianhe South Road, Guangzhou, Guangdong, Tianhe District Patentee after: Guangzhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd. Address before: 510620, No. two, No. 2, Tianhe South Road, Guangzhou, Guangdong, Tianhe District Patentee before: GUANGZHOU POWER SUPPLY Co.,Ltd. |
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Effective date of registration: 20221229 Address after: 510620, No. two, No. 2, Tianhe South Road, Guangzhou, Guangdong, Tianhe District Patentee after: Guangzhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd. Patentee after: GUANGDONG POWER GRID Co.,Ltd. Address before: 510620, No. two, No. 2, Tianhe South Road, Guangzhou, Guangdong, Tianhe District Patentee before: Guangzhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd. |
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Application publication date: 20191018 Assignee: GUANGZHOU ELECTRIC POWER DESIGN INSTITUTE Co.,Ltd. Assignor: Guangzhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd. Contract record no.: X2023980046623 Denomination of invention: Pulse generating circuit Granted publication date: 20200814 License type: Common License Record date: 20231109 |
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