CN108718109A - A kind of line feed terminals and residual voltage module detection circuit - Google Patents
A kind of line feed terminals and residual voltage module detection circuit Download PDFInfo
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- CN108718109A CN108718109A CN201810615997.XA CN201810615997A CN108718109A CN 108718109 A CN108718109 A CN 108718109A CN 201810615997 A CN201810615997 A CN 201810615997A CN 108718109 A CN108718109 A CN 108718109A
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- 238000001514 detection method Methods 0.000 title claims abstract description 58
- 239000003990 capacitor Substances 0.000 claims abstract description 25
- 238000005070 sampling Methods 0.000 claims abstract description 7
- 230000005611 electricity Effects 0.000 claims description 20
- 238000000034 method Methods 0.000 abstract description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 230000003111 delayed effect Effects 0.000 description 3
- 230000011218 segmentation Effects 0.000 description 3
- 238000002360 preparation method Methods 0.000 description 2
- 230000001681 protective effect Effects 0.000 description 2
- 238000012360 testing method Methods 0.000 description 2
- 208000025274 Lightning injury Diseases 0.000 description 1
- 101100149782 Neurospora crassa (strain ATCC 24698 / 74-OR23-1A / CBS 708.71 / DSM 1257 / FGSC 987) vsp-5 gene Proteins 0.000 description 1
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- 238000006243 chemical reaction Methods 0.000 description 1
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- 230000018109 developmental process Effects 0.000 description 1
- 238000004146 energy storage Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000004615 ingredient Substances 0.000 description 1
- 238000007689 inspection Methods 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000011895 specific detection Methods 0.000 description 1
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- H02J13/0013—
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/0084—Arrangements for measuring currents or voltages or for indicating presence or sign thereof measuring voltage only
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Abstract
The present invention relates to a kind of line feed terminals and residual voltage module detection circuits, belong to electric power detection device technical field.The present invention includes terminal handler and residual voltage module detection circuit, residual voltage module detection circuit includes sequentially connected take can mutual inductor, step-down transformer and rectification circuit, the output end of rectification circuit connects two branches, the first branch and the second branch, the first branch includes storage capacitor, and storage capacitor connects a level shifting circuit for providing control power supply (VCC)；The second branch includes voltage collection circuit and output interface；Further include a residual voltage processor for residual voltage detection, residual voltage processor sampling connection output interface；Power supply (VCC) is controlled to be used to power for voltage collection circuit and processor；Terminal handler is connect with residual voltage processor.The present invention can fast and accurately detect faulty circuit in line feed terminals start-up course, avoid fault current in detection process and impact substation, improve reliability and the safety of detection.
Description
Technical field
The present invention relates to a kind of line feed terminals and residual voltage module detection circuits, belong to electric power detection device technical field.
Background technology
With the development of economy, more and more high to the reliability of power grid, security requirement at present, it is reliable how to improve power supply
Property become line feed terminals key.Automatic circuit, sectionaliser and contact device are the important equipment of whole basic routing line, are allowed to a group ingredient
Cloth control model on the spot either selects VSP5 on-load switches or breaker to be used as block switch and contact in circuit
Switch is all the relay protective scheme depending on line feed terminals joined together.Line feed terminals as segmentation or contact are all adopted
It is powered with bilateral PT, line outage area surface is reduced by the principle of " incoming call closes, no pressure release " (voltage-time type logic)
Product, this line feed terminals for being that is segmented or getting in touch with are required to collection voltages and reduce line as criterion to execute relay protective scheme
The region area that road has a power failure, and before circuit power transmission, line feed terminals are in dead electricity not operating status, in transmission process, if line
There are failures, the automatic circuit of substation exit can carry out fast tripping protection action tripping in road, and substation exit opens in 100ms
Close can tripping, and basic routing line it is subsequent segmentation or interconnection tie terminal start time be required for hundreds of milliseconds, make
The variation of voltage can not be detected in a short time at segmentation or interconnection tie terminal cannot make corresponding protection act immediately, only
Gradually isolated fault point can be carried out during multiple shot reclosing by the automatic circuit of substation exit, it is such to cause failure electricity
Liu Hui repeat impacts substation, and fault point cannot be judged rapidly, reduce power supply reliability.
Invention content
The purpose of the present invention is to provide a kind of line feed terminals, are rushed for solving fault current in existing terminal detection process
The problem of hitting substation, and fault point cannot being judged rapidly, reduce power supply reliability.Meanwhile the present invention also provides
A kind of residual voltage module detection circuit, for solving the problems, such as that existing detection circuit can not detect failure in terminal start-up course.
To achieve the above object, the present invention proposes a kind of line feed terminals, including terminal handler and residual voltage module detection electricity
Road, residual voltage module detection circuit include it is sequentially connected take can mutual inductor, step-down transformer and rectification circuit, rectification circuit it is defeated
Outlet connects two branches, the first branch and the second branch, and the first branch includes storage capacitor, and storage capacitor connects one and is used for
The level shifting circuit of control power supply (VCC) is provided；The second branch includes voltage collection circuit and be used for output digit signals
Output interface；Further include a residual voltage processor for residual voltage detection, residual voltage processor sampling connection output interface；Control electricity
Source (VCC) is used to power for voltage collection circuit and residual voltage processor；Terminal handler is connect with residual voltage processor.
Residual voltage module detection circuit in line feed terminals of the present invention can be in line feed terminals start-up course by fault detect
Out and record fault message is stored, the transmission that failure logging carries out fault message, nothing are directly transferred after line feed terminals startup
The detection for needing to wait for carrying out fault message after line feed terminals start, saves detection time, realizes the quick and precisely detection of failure, carry
The high reliability of detection；And the automatic circuit that repeatedly closes a floodgate after starting without waiting for line feed terminals carries out the detection of failure, avoids
Fault current impacts substation in detection process, improves the safety of detection.
Further, voltage collection circuit includes bleeder circuit and triode, and the base stage of triode connects bleeder circuit
Divide end, the emitter ground connection of triode, the collector connection control power supply (VCC) of triode.
Voltage collection circuit will convert analog signal to digital signal and be detected, and testing result is intuitive, and detection is simple
It is convenient, it is not error-prone.
Further, voltage collection circuit further includes filter capacitor, the base of wherein one end connecting triode of filter capacitor
Pole, the emitter of other end connecting triode.
Stability, the reliability of voltage collection circuit are improved by filter capacitor, ensure that output signal is accurate.
Further, voltage collection circuit includes electric capacity of voltage regulation, the current collection of wherein one end connecting triode of electric capacity of voltage regulation
Pole, the emitter of other end connecting triode.
The stability of institute's collection voltages is improved by electric capacity of voltage regulation, ensures that testing result is accurate.
In addition, the present invention proposes a kind of residual voltage module detection circuit, including sequentially connected take can mutual inductor, downconverter
The output end of device and rectification circuit, rectification circuit connects two branches, and the first branch and the second branch, the first branch include energy storage
Capacitance, storage capacitor connect a level shifting circuit for providing control power supply (VCC)；The second branch includes voltage acquisition
Circuit and the output interface for being used for output digit signals；Further include a residual voltage processor for residual voltage detection, residual voltage processing
Device sampling connection output interface；Power supply (VCC) is controlled to be used to power for voltage collection circuit and residual voltage processor.
Further, voltage collection circuit includes bleeder circuit and triode, and the base stage of triode connects bleeder circuit
Divide end, the emitter ground connection of triode, the collector connection control power supply (VCC) of triode.
Further, voltage collection circuit further includes filter capacitor, the base of wherein one end connecting triode of filter capacitor
Pole, the emitter of other end connecting triode.
Further, voltage collection circuit further includes electric capacity of voltage regulation, the collection of wherein one end connecting triode of electric capacity of voltage regulation
Electrode, the emitter of other end connecting triode.
Description of the drawings
Fig. 1 is residual voltage module detection circuit figure of the present invention；
Fig. 2 is that residual voltage of the present invention detects decision logic figure；
Fig. 3 is the decision logic figure of this residual voltage module detection circuit effectively after the power is turned on.
Specific implementation mode
Embodiments of the present invention are described further below in conjunction with the accompanying drawings.
Line feed terminals embodiment：
Line feed terminals include terminal handler and residual voltage module detection circuit, and residual voltage module detection circuit includes being sequentially connected
Take can mutual inductor, step-down transformer and rectification circuit, the output end of rectification circuit connects two branches, the first branch and second
Branch, the first branch include storage capacitor, and storage capacitor connects a level conversion electricity for providing control power supply (VCC)
Road；The second branch includes voltage collection circuit and the output interface for output digit signals；Further include one to examine for residual voltage
The residual voltage processor of survey, residual voltage processor sampling connection output interface；Power supply (VCC) is controlled to be used for as voltage collection circuit and residual
Press processor power supply；Terminal handler is connect with residual voltage processor.
Voltage collection circuit includes bleeder circuit and triode, the partial pressure end of the base stage connection bleeder circuit of triode, and three
The emitter of pole pipe is grounded, the collector connection control power supply (VCC) of triode；Further include filter capacitor, filter capacitor its
The base stage of middle one end connecting triode, the emitter of other end connecting triode；Further include electric capacity of voltage regulation, electric capacity of voltage regulation is wherein
The collector of one end connecting triode, the emitter of other end connecting triode.
Specific connection relation is as shown in Figure 1, line feed terminals include terminal handler (not provided in attached drawing) and residual voltage module
Detection circuit, residual voltage module detection circuit external power supply are provided by outdoor switch PT (10/0.22kV) and (are taken energy mutual inductor), the confession
Electric power sources in parallel TVS pipe R1, by C1, L2, C2, C5, C6 form filter circuit, after PT1 step-down transformers, by by
After full-wave rectification bridge (rectification circuit) rectification of D1, D2, D3, D4 composition, two branches, a branch is divided to connect two poles
Pipe D5 charges (storage capacitor) to capacitance E4, and the voltage DCPowerIn connection level shifting circuits on storage capacitor E4 are (in attached drawing
Do not provide), level shifting circuit is used to power to control power supply (VCC)；Another branch connects voltage collection circuit, passes through limit
The base stage of leakage resistance R2 connecting triodes Q3, R6, C9 (filter capacitor) are parallel to base stage and transmitting interpolar, the control of triode Q3
Power supply (VCC) accesses the collector of triode Q3, the collector electricity in parallel with transmitting interpolar of triode Q3 by current-limiting resistance R5
Hold C15 (electric capacity of voltage regulation), emitter ground connection, the collector of triode Q3 is directly accessed I/O port (output interface)；It further include one
For the residual voltage processor (not provided in attached drawing) of residual voltage detection, residual voltage processor sampling connection output interface controls power supply
(VCC) it is used to power for voltage collection circuit and residual voltage processor；Terminal handler is connect with residual voltage processor, residual for extracting
Press the data of processor record.Wherein, storage capacitor E4 is that storage capacitor is used to lay in electricity, is lost in Ua1, Ua2 external power supply
In the case of electricity, backup power supply can be provided for residual voltage module detection circuit；R1 prevents overvoltage, lightning stroke, shields.
When Ua1, Ua2 provide external power supply, the partial pressure terminal voltage of voltage collection circuit is more than the electric conduction of triode Q3
Pressure, triode Q3 is in the conduction state, and ground connection is connected with emitter for the collector of triode Q3, and output interface I/O port is low electricity
It is flat, show that residual voltage module detection circuit external power supply powers on, this partial circuit is normal circuit；Outside Ua1, Ua2 are no longer provided
When portion's power supply, the partial pressure terminal voltage of voltage collection circuit is less than the conducting voltage of triode Q3, and triode Q3 is closed,
The collector of triode Q3 is disconnected with emitter, the collector voltage of triode Q3 power supply (VCC) voltage in order to control, output interface
I/O port is high level, shows that residual voltage module detection circuit external power supply dead electricity, this partial circuit are faulty circuit.
As shown in Fig. 2, specific detection process is：
In line feed terminals start-up course, residual voltage module detection circuit has already powered on operation at this time, starts to output interface
I/O port output signal is detected, and executes following steps：
(1) electricity operation proceeds by the detection of output interface I/O port on；
(2) if output interface I/O port detects that low level shows that residual voltage module detection circuit external power supply powers on, will enter
Effective delayed state；
(3) if delay is arrived, output interface I/O port still detects low level, will enter effective power-up state；
(4) if during delay, output interface I/O port detects high level, will enter effective power failure state；
(5) under effective power failure state, output interface I/O port detects low level, will reenter effective delayed shape
State repeats step (3), (4)；
(6) when step (2) output interface I/O port detects that high level shows residual voltage module detection circuit external power supply dead electricity,
Effective dead electricity delay state will be entered；
(7) if delay is arrived, output interface I/O port still detects high level, will enter effective power failure state；
(8) if during delay, output interface I/O port detects low level, will enter effective power-up state；
(9) under effective power-up state, output interface I/O port detects high level, will reenter effective dead electricity delay shape
State repeats step (7), (8).
When instantaneous interference occurs in circuit, residual voltage module detection circuit will start operation, judge residual voltage state；And it is effective
When delayed state will avoid circuit and instantaneous interference occurs, to the false judgment of residual voltage, the accuracy of detection is improved.Together
When, since the voltage after whole rectifications is continual half wave component, when output interface I/O port detects, external power supply is just
State in wave base, it will to residual voltage misjudgment；And effectively dead electricity delay avoids the generation of such case, improves inspection
The accuracy of survey.
After by judging to determine residual voltage module detection circuit effectively to power on, flow as shown in Figure 3 will be executed：
(1) electricity operation residual voltage module detection circuit is in output preparation state on；
(2) after being judged as effective power-up state, residual voltage delay state will be entered；
(3) if delay is arrived, normal power-up state will be entered, show that residual voltage module detection circuit belongs to normally upper electricity operation,
It is not belonging to residual voltage, that is, failure is not present, therefore residual voltage module detection circuit will not export；
(4) during step (3) delay, when output interface I/O port detects high level, i.e. external power supply dead electricity, show
Circuit is faulty, and residual voltage processor output at this time is carried out at the same time residual voltage record；
(5) under normal power-up state, when output interface I/O port detects high level, i.e. external power supply dead electricity, again into
Enter to export preparation state, re-executes step (2), (3), (4).
After line feed terminals normal operation, terminal handler transfers the record of residual voltage processor, immediately to presenting accordingly
Line terminal is directly latched combined floodgate, achievees the purpose that promptly isolate failure.
Residual voltage module detection circuit embodiment：
Residual voltage module detection circuit is included in above-mentioned line feed terminals, and specific implementation mode is implemented in above-mentioned line feed terminals
It has illustrated in example, has not repeated herein.
It is specific description have been carried out to the better embodiment of the present invention, but the present invention is not limited to above real above
Example, those skilled in the art can also make various equivalent variations and be replaced under the premise of without prejudice to spirit of that invention
It changes, these equivalent variations and replacement are all contained in the application claim limited range.
Claims (8)
1. a kind of line feed terminals, including terminal handler, which is characterized in that further include residual voltage module detection circuit, the residual voltage
Module detection circuit include it is sequentially connected take can mutual inductor, step-down transformer and rectification circuit, the output of the rectification circuit
Two branches of end connection, the first branch and the second branch, the first branch include storage capacitor, the storage capacitor connection one
A level shifting circuit for providing control power supply (VCC)；The second branch include voltage collection circuit with for exporting
The output interface of digital signal；Further include a residual voltage processor for residual voltage detection, the residual voltage processor sampling connection
The output interface；The control power supply (VCC) is used to power for the voltage collection circuit and residual voltage processor；The terminal
Processor is connect with the residual voltage processor.
2. line feed terminals according to claim 1, which is characterized in that the voltage collection circuit includes bleeder circuit and three
The base stage of pole pipe, the triode connects the partial pressure end of the bleeder circuit, the emitter ground connection of the triode, three pole
The collector of pipe connects the control power supply (VCC).
3. line feed terminals according to claim 2, which is characterized in that the voltage collection circuit further includes filter capacitor,
Wherein one end of the filter capacitor connects the base stage of the triode, and the other end connects the emitter of the triode.
4. line feed terminals according to claim 3, which is characterized in that the voltage collection circuit further includes electric capacity of voltage regulation,
Wherein one end of the electric capacity of voltage regulation connects the collector of the triode, and the other end connects the emitter of the triode.
5. a kind of residual voltage module detection circuit, including it is sequentially connected take can mutual inductor, step-down transformer and rectification circuit, it is special
Sign is that the output end of the rectification circuit connects two branches, the first branch and the second branch, and the first branch includes storage
Energy capacitance, storage capacitor connect a level shifting circuit for providing control power supply (VCC)；The second branch includes electricity
Press Acquisition Circuit and the output interface for being used for output digit signals；Further include a residual voltage processor for residual voltage detection, institute
It states the sampling of residual voltage processor and connects the output interface；The control power supply (VCC) is used for as the voltage collection circuit and residual
Press processor power supply.
6. residual voltage module detection circuit according to claim 5, which is characterized in that the voltage collection circuit includes partial pressure
The base stage of circuit and triode, the triode connects the partial pressure end of the bleeder circuit, and the emitter of the triode is grounded,
The collector of the triode connects the control power supply (VCC).
7. residual voltage module detection circuit according to claim 6, which is characterized in that the voltage collection circuit further includes filter
Wave capacitance, wherein one end of the filter capacitor connect the base stage of the triode, and the other end connects the transmitting of the triode
Pole.
8. residual voltage module detection circuit according to claim 7, which is characterized in that the voltage collection circuit further includes steady
Voltage capacitance, wherein one end of the electric capacity of voltage regulation connect the collector of the triode, and the other end connects the hair of the triode
Emitter-base bandgap grading.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810615997.XA CN108718109A (en) | 2018-06-14 | 2018-06-14 | A kind of line feed terminals and residual voltage module detection circuit |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810615997.XA CN108718109A (en) | 2018-06-14 | 2018-06-14 | A kind of line feed terminals and residual voltage module detection circuit |
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| CN108718109A true CN108718109A (en) | 2018-10-30 |
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| CN201810615997.XA Pending CN108718109A (en) | 2018-06-14 | 2018-06-14 | A kind of line feed terminals and residual voltage module detection circuit |
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Cited By (3)
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| CN109842211A (en) * | 2019-03-04 | 2019-06-04 | 石家庄科林电气股份有限公司 | A kind of residual voltage detection method of residual voltage logging modle and automatic circuit formula line feed terminals |
| CN110635459A (en) * | 2019-10-17 | 2019-12-31 | 广西电网有限责任公司南宁供电局 | Residual voltage blocking method and circuit for dual-path calibration |
| CN111983297A (en) * | 2020-08-21 | 2020-11-24 | 重庆新世杰电气股份有限公司 | An instantaneous residual pressure detection method, device and equipment, and a residual pressure recording component |
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