CN106124932B - A kind of signal generator and the method using generator progress cable fault test - Google Patents
A kind of signal generator and the method using generator progress cable fault test Download PDFInfo
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- CN106124932B CN106124932B CN201610519924.1A CN201610519924A CN106124932B CN 106124932 B CN106124932 B CN 106124932B CN 201610519924 A CN201610519924 A CN 201610519924A CN 106124932 B CN106124932 B CN 106124932B
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- 238000012360 testing method Methods 0.000 title claims abstract description 17
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- 239000003990 capacitor Substances 0.000 claims abstract description 93
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- 239000000523 sample Substances 0.000 claims description 12
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- 238000004458 analytical method Methods 0.000 claims description 5
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- 230000005540 biological transmission Effects 0.000 claims description 3
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- 238000011017 operating method Methods 0.000 claims description 3
- 230000005236 sound signal Effects 0.000 claims description 3
- 230000010355 oscillation Effects 0.000 claims description 2
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- 238000009413 insulation Methods 0.000 abstract description 20
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- 238000012913 prioritisation Methods 0.000 description 3
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
- G01R31/083—Locating faults in cables, transmission lines, or networks according to type of conductors in cables, e.g. underground
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/08—Locating faults in cables, transmission lines, or networks
- G01R31/088—Aspects of digital computing
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Abstract
The present invention relates to a kind of High-voltage Signal Generators, including high-voltage power supply, electric discharge device and capacitor connecting wire switching device；The capacitor connecting wire switching device includes bottom plate, the capacitor terminal plate being arranged in above bottom plate and capacitor wiring switching mechanism；The capacitor wiring switching mechanism includes series wiring module, Wiring module in parallel and series-parallel connection module；The electric discharge device includes the driving mechanism that swing rod charge and discharge mechanism and driving swing rod charge and discharge mechanism are swung；Swing rod charge and discharge mechanism includes positive swing rod, cathode swing rod, charging fishplate bar and insulation barrier, and the insulation barrier is arranged between positive swing rod and cathode swing rod.The method for further relating to carry out cable fault test using the generator.Being kept completely separate with charging operations in charge and discharge process and discharge operation compared with prior art, charging process is individually carried out with discharge process, and there is no cross influences, it is ensured that the characteristics of the stability that whole equipment is run.
Description
Technical field
The present invention relates to a kind of signal generator, the method using generator progress cable fault test is further related to.
Background technique
Nearest more than ten years, the big great development of country's construction, the dosage of cable start to expand rapidly, especially in recent years, very much
Implement overhead line for urban and enter ground engineering, largely use cable, this is just proposed to the operation of cable and maintenance in city
Higher requirement.And due to the diversification of client, the level of demand is different, original power supply system unitary demand to
Conglomerate, multi-level demand direction develop.Such as power supply system, the cable of user's selection is increasingly longer, and sectional area is increasingly
Greatly, the tester needed requires bigger capacity, often selects external cable fault to test some high-end users
Vehicle, every cost is all in members up to a million.The user prefecture-level for power supply system, due to financial pressure, the good often choosing of condition
Domestic cable fault test carriage is selected, selection almost uses portable device.According to the actual fact, even with electricity
Also selection adds a set of portable electric cable failure detector to the unit of cable test vehicle.Every portable failure tester one of set
As all at ten tens of thousands of yuans.For power supply company at county level, be typically chosen using it is tens of thousands of to 100,000 or so fault test
Instrument.Practicability is more stressed, and since financial pressure is larger since the dosage of cable is also very big for cable factory and industrial enterprise,
It is typically chosen 50,000 yuan or so of every set of failure tester.For cell and rural area, simple product is selected, solves low-voltage cable
Simple fault.General all 2000 yuan of Optional Value or so of tester.
The principle of cable fault test carriage detection is to improve detection efficiency using the method for increasing discharge energy, but it sets
It is standby heavy, can only be shifted by the way of vehicle-mounted, for the area that some landform or road are restricted use by
To great limitation.It is by the way of reducing discharge energy for portable failure tester, defect is that partial fault is surveyed
Away from difficulty, fixed point is difficult.
It makes a general survey of electric cable failure detector and cable fault test carriage both domestic and external, is all using people when type cable failure positioning
The fix-point method of work on-site monitoring, the fixed point time is long, and bad environments, inefficiency needs Test Engineer in the top of cable
Long-term to monitor, environment is poor, and labor intensity is high, and pressure is big, to the more demanding of Field Force, a bottle that really cable fault is tested
Neck ring section.
Summary of the invention
The present invention relates to a kind of signal generator, the method using generator progress cable fault test is further related to.
The technical scheme of the present invention is realized as follows: a kind of High-voltage Signal Generator, including high-voltage power supply and electric discharge device,
It is characterized by also including capacitor connecting wire switching devices；The capacitor connecting wire switching device includes bottom plate, is arranged above bottom plate
Capacitor terminal plate and capacitor wiring switching mechanism；The plate upper surface is connected with pedestal, and the capacitor terminal plate is fixed in
On pedestal, capacitor output line and multiple groups binding post are provided on the capacitor terminal plate；The capacitor wiring switching mechanism includes
Series wiring module, Wiring module in parallel and series-parallel connection module, the series wiring module include that push rod and being fixed in pushes away
Series connection wiring board on bar, the wiring board in parallel that the parallel connection Wiring module includes push rod and is fixed on push rod, the string is simultaneously
Couple the series-parallel wiring board that wire module includes push rod and is fixed on push rod, the series wiring module, Wiring module in parallel
It is rotatablely connected respectively with bottom plate with series-parallel connection module；On the series connection wiring board, wiring board in parallel and series-parallel wiring board
It is equipped with the connecting groove with binding post corresponding number；The electric discharge device includes swing rod charge and discharge mechanism and driving swing rod charge and discharge
The driving mechanism that mechanism is swung；Swing rod charge and discharge mechanism includes positive swing rod, cathode swing rod, charging fishplate bar and insulation stop
Plate, the insulation barrier are arranged between positive swing rod and cathode swing rod；The anode swing rod bottom end and cathode swing rod bottom end point
It is not rotatably installed on a bearing block, is provided with connecting shaft between the anode swing rod and cathode swing rod, the connecting shaft
Both ends are rotatablely connected with positive swing rod and cathode swing rod respectively；Discharge contact is provided on the anode swing rod and cathode swing rod
And charging contact, capacitor connection line is connected between the discharge contact and charging contact, the capacitor connection line and capacitor are defeated
Outlet connection, the discharge contact are connect with failure cable, and the charging contact is connect with charging fishplate bar, and the charging fishplate bar is set
It sets on the track where charging contact swing.
Every group of binding post includes positive terminal and negative terminal, the anode as a preferred technical solution,
Binding post is connected with the anode of capacitor, and the negative terminal is connected with the cathode of capacitor；The capacitor output line includes anode
Capacitor output line and cathode capacitor output line, the positive electrode capacitance output line are connect with head end positive terminal, the negative electricity
Hold output line to connect with end negative terminal；The positive terminal and negative terminal are respectively four, pass through four anodes
Binding post and four negative terminals connect four capacitors.
The rotation connection of the series-parallel connection module and bottom plate is the plate upper surface as a preferred technical solution,
It is affixed there are two first bearing seat, plate single shaft, the series-parallel connection module push rod are connected between two first bearing seats
One end and plate single shaft are rotatablely connected；The rotation connection of the parallel connection Wiring module and series wiring module and bottom plate is on bottom plate
Surface is affixed there are two second bearing seat, and plate transaxle, the parallel connection Wiring module are connected between two second bearing seats
Push rod one end and series wiring module push rod one end are rotatablely connected with plate transaxle, and Wiring module in parallel and series wiring
Module can be slided along the direction where plate transaxle.
The connecting groove includes positive terminal slot and negative terminal slot, the positive terminal as a preferred technical solution,
Slot position is corresponding with positive terminal position, and negative terminal slot position is opposite with negative terminal position
It answers；Connection type on the series connection wiring board between connecting groove is series connection, the company on the parallel connection wiring board between connecting groove
Mode is connect as parallel connection, the connection type on the series-parallel wiring board between connecting groove is series and parallel combination.
The insulation barrier includes upper insulation barrier and lower insulation barrier, the upper insulation as a preferred technical solution,
Baffle is located above connecting shaft, and the lower insulation barrier is located at below connecting shaft.
The discharge contact and charging contact that the positive swing rod is equipped with as a preferred technical solution, are respectively positive discharge
Contact and positive charging contact, the capacitor connection line between the positive discharge contact and positive charging contact are positive electrode capacitance company
Wiring, the anode capacitor connection line are connect with positive electrode capacitance output line；The core wire of the positive discharge contact and failure cable
Connection.
The discharge contact and charging contact that the cathode swing rod is equipped with as a preferred technical solution, are respectively negative discharge
Contact and cathode charging contact, the capacitor connection line between the negative discharge contact and cathode charging contact be negative electrode capacitance company
Wiring, the cathode capacitor connection line connect connection with cathode capacitor output line；The negative discharge contact is connect with ground wire.
As a preferred technical solution, the charging fishplate bar include anode charging fishplate bar and cathode charge fishplate bar, it is described just
The anode of pole charging fishplate bar and high-voltage power supply connects, and the cathode of the cathode charging fishplate bar and high-voltage power supply connects, the positive charging
Contact is connect with anode charging fishplate bar, and the cathode charging contact is connect with cathode charging fishplate bar.
The driving mechanism includes motor, runner and push rod, key on the motor output shaft as a preferred technical solution,
Be connected with runner, connecting rod be connected on the runner, described push rod one end and connecting rod are hinged, the other end of the push rod with
Connecting shaft rotation connection.
A method of cable fault test, including following operating procedure are carried out using High-voltage Signal Generator:
1) capacitor of 4 16 microfarad 10000v is attached with one group of binding post respectively, capacitor connection line is defeated with capacitor
Outlet is attached, and driving motor operation drives swing rod charge and discharge mechanism to do periodic swing, swing rod charge and discharge mechanism runner
One circle of rotation, swing rod charge and discharge mechanism swing one back and forth, can control swing rod charge-discharge machine by controlling driving motor revolving speed
Structure swing period, that is, control discharge cycle length；When positive swing rod and cathode swing rod are rocked to the charged area of side simultaneously,
Complete the charging to capacitor, charging time 26-32s；With the side of positive swing rod and cathode swing rod simultaneously round about
When swinging certain angle, charging contact is disconnected with charging fishplate bar, and charging terminates；Positive swing rod and cathode swing rod are swung simultaneously
To the other side region of discharge when, the core wire of positive discharge contact and failure cable on positive swing rod connects, on cathode swing rod
Negative discharge contact connect with ground wire, capacitor discharges to failure cable, 2000 joules of impulse discharge energy, discharge time
0.3-0.5s；
2) position of fault point is determined by type cable failure positioning system；Type cable failure positioning system includes being placed on cable
More fixed point apparatus and host platform near fault point；Every fixed point apparatus is provided with multiple sensors can acquire cable simultaneously
The multi-signal of fault point release, and the signal that will test is transferred to the microprocessor being equipped in fixed point apparatus, passes through micro process
Device carries out signal processing；Microprocessor is also connected with wireless transport module, can be by data information by way of wireless transmission
It is transferred to host platform；Show the signal of every fixed point apparatus, signal of the host platform for multipoint acquisition respectively by host platform
It shown, analysis processing, compared, determine the position of fault point；The sensor being arranged on every fixed point apparatus includes acquisition magnetic field
The coil of signal, the vibrating sensor of collected sound signal and the probe for acquiring step voltage signal；
3) associated data analytical calculation is out of order a position, and step voltage determines the direction of fault point；Fault point it
Before, when electrion, the potential difference in every meter of length is negative (High-voltage Signal Generator apply be negative high-voltage signal), is said
It is bright before fault point；Across after fault point, the potential difference in every meter of length becomes positive, and closer from fault point, signal is stronger；
Magnetic field signal be also it is closer from fault point, signal is stronger；The vibration signal of sound is then delayed to determine, when sound magnetic is delayed by sound magnetic
Between it is shorter, it is closer from fault point；The sound of every fixed point apparatus receives signal time will be within 90-100 milliseconds；In this way, fixed point
Vibration signal near instrument within 30 meters can receive.Fault point is within 30 meters, so that it may detect.If there are two with
Upper probe collects sound magnetic signal, and can calculate the position of fault point: the sound magnetic delay of fixed point apparatus 1 is TI, fixed point apparatus 2
The delay of sound magnetic is T2;Since the spread speed in magnetic field is the light velocity, the spread speed of sound only has more than 300 metre per second (m/s)s, it is possible to
Approximately think that T1, T2 are exactly the propagation time;On the ground, the distance of fault point to probe 1 is S1, fault point to probe 2
Distance is S2;Assuming that distance is a meters between two fixed point apparatus, the buried depth of cable is h meters, and sound is when the propagation speed in ground medium
Degree is V, then S1+S2=a, S12=V2*T12-h2；S22=V2*T22-h2, can calculate the position S1 of fault point= S2=。
By adopting the above-described technical solution, the present invention have it is following prominent the utility model has the advantages that
1, the Wiring module used according to the needs to different voltages grade, selection with the mating connection of capacitor terminal plate, when
It is series wiring module with the mating Wiring module used that connects of capacitor terminal plate, is accomplished that four capacitor series connection make at this time
With being accomplished that four capacitors at this time simultaneously when being Wiring module in parallel with the mating Wiring module that uses of connecting of capacitor terminal plate
Connection uses, and when being series-parallel connection module with the mating Wiring module used that connects of capacitor terminal plate, is accomplished that two at this time
Capacitor parallel connection and two capacitors are used in series, and are met to different voltages grade cable, when applying different high-voltage signals, transformation
Different capacitances, the close demand of discharge energy.In the not increased situation of weight, in the case of different voltages, discharge energy is most
Big needs.
2, charging fishplate bar is arranged on the track where charging contact is swung, and the length by changing charging fishplate bar can change
Become the charging duration to capacitor.
3, power is provided by motor, drives runner rotation, runner pushes push rod to do front and back periodically while rotation
Reciprocating motion, that is, realize the periodic wobble of swing rod charge and discharge mechanism.Revolving speed by controlling motor can change swing rod
Swing period, that is, change discharge cycle, do not need the equipment such as additional control circuit and the time relay to discharge cycle
It is controlled, safety is higher, and equipment operation is more stable.
4, swing rod charge and discharge mechanism carries out charge and discharge process using the periodic wobble of swing rod, realizes in charge and discharge process
Charging operations and discharge operation are kept completely separate, and charging process is individually carried out with discharge process, and there is no cross influences, it is ensured that
The stability of whole equipment operation, improves duration of service.
It 5, due to the acquisition of multiple fixed point apparatus is discharge signal with a cable fault, so the letter of each fixed point apparatus
Number reflection be different location the same source signal, after excluding the interference signal, the correlation of signal is very good.By multiple spot
Comparison, the analysis of signal, calculate, can quickly determine the position of fault point.It greatly improves the efficiency, reduces labor intensity.
Detailed description of the invention
In order to more clearly explain the embodiment of the invention or the technical proposal in the existing technology, to embodiment or will show below
There is attached drawing needed in technical description to be briefly described, it should be apparent that, the accompanying drawings in the following description is only this
Some embodiments of invention without any creative labor, may be used also for those of ordinary skill in the art
To obtain other drawings based on these drawings.
Fig. 1 is the utility model electric discharge device overlooking structure diagram.
Fig. 2 is the utility model swing rod charge and discharge mechanism structural schematic diagram.
Fig. 3 is the utility model capacitor connecting wire switching device structural schematic diagram.
Fig. 4 is the utility model capacitor wiring switching mechanism structural schematic diagram.
Fig. 5 connection relationship structural schematic diagram between the utility model capacitor terminal plate and capacitor.
In figure: 1- motor；2- runner；3- push rod；4- connecting rod；5- connecting shaft；6- anode swing rod；7- cathode swing rod；8-
Bearing block；9- positive discharge contact；10- negative discharge contact；11- anode charging fishplate bar；12- cathode charging fishplate bar；13- cathode
Charging contact；14- anode charging contact；The upper insulation barrier of 15-；Insulation barrier under 16-；17- anode capacitor connection line；18- is negative
Electrode capacitance connecting line；19- bottom plate；20- capacitor terminal plate；21- pedestal；22- positive terminal；23- negative terminal；24- is just
Electrode capacitance output line；25- cathode capacitor output line；26- series wiring module；27- parallel connection Wiring module；28- series-parallel connection
Module；29- series connection wiring board；30- parallel connection wiring board；The series-parallel wiring board of 31-；32- first bearing seat；33- plate is uniaxial；
34- second bearing seat；35- plate transaxle.
Specific embodiment
Following will be combined with the drawings in the embodiments of the present invention, and technical solution in the embodiment of the present invention carries out clear, complete
Site preparation description, it is clear that described embodiments are only a part of the embodiments of the present invention, instead of all the embodiments.It is based on
Embodiment in the present invention, it is obtained by those of ordinary skill in the art without making creative efforts every other
Embodiment shall fall within the protection scope of the present invention.
As shown in Fig. 1,2,3,4,5, the utility model includes high-voltage power supply, electric discharge device and capacitor connecting wire switching device.
The capacitor connecting wire switching device includes that bottom plate 19, the capacitor terminal plate 20 that 19 top of bottom plate is arranged in and capacitor connect
Line switching mechanism.19 upper surface of bottom plate is connected with pedestal 21, and the capacitor terminal plate 20 is fixed on pedestal 21.The electricity
Hold and be provided with capacitor output line and multiple groups binding post on terminal plate 20, every group of binding post includes positive terminal 22 and cathode
Binding post 23, the positive terminal 22 are connected with the anode of capacitor, and the negative terminal 23 is connected with the cathode of capacitor, institute
Stating capacitor output line includes positive electrode capacitance output line 24 and cathode capacitor output line 25, the positive electrode capacitance output line 24 and head end
Positive terminal 22 connects, and the cathode capacitor output line 25 is connect with end negative terminal 23.In prioritization scheme, it is described just
Pole binding post 22 and negative terminal 23 are respectively four, pass through four positive terminals 22 and four connections of negative terminal 23 four
A capacitor.
The capacitor wiring switching mechanism includes series wiring module 26, Wiring module 27 in parallel and series-parallel connection module
28, the series wiring module 26 includes push rod and the series connection wiring board 29 being fixed on push rod, the parallel connection Wiring module 27
Including push rod and the wiring board in parallel 30 being fixed on push rod, the series-parallel connection module 28 includes push rod and is fixed in push rod
On series-parallel wiring board 31.The series wiring module 26, Wiring module 27 in parallel and series-parallel connection module 28 respectively with
Bottom plate 19 is rotatablely connected.In prioritization scheme, the rotation connection of the series-parallel connection module 28 and bottom plate 19 is the bottom plate 19
Upper surface is affixed there are two first bearing seat 32, and plate single shaft 33 is connected between two first bearing seats 32, described series-parallel
28 push rod one end of Wiring module and plate single shaft 33 are rotatablely connected.The parallel connection Wiring module 27 and series wiring module 26 and bottom
The rotation connection of plate 19 is second bearing seat 34 there are two 19 upper surface of bottom plate is affixed, is connected between two second bearing seats 34
Plate transaxle 35, it is described parallel connection 27 push rod one end of Wiring module and 26 push rod one end of series wiring module with plate transaxle
35 rotation connections, and Wiring module 27 in parallel and series wiring module 26 can be slided along the direction where plate transaxle 35
It is dynamic.
It is equipped with and binding post corresponding number on the series connection wiring board 29, wiring board 30 in parallel and series-parallel wiring board 31
Connecting groove 36, the connecting groove 36 include positive terminal slot and negative terminal slot, positive terminal slot position with just
Binding post 22 position in pole is corresponding, and negative terminal slot position is corresponding with 23 position of negative terminal.The series connection
Connection type on wiring board 29 between connecting groove 36 is series connection, the connection side on the parallel connection wiring board 30 between connecting groove 36
Formula is parallel connection, and the connection type on the series-parallel wiring board 31 between connecting groove 36 is series and parallel combination.According to difference
The needs of voltage class, the Wiring module that selection is used with the mating connection of capacitor terminal plate 20, when mating with capacitor terminal plate 20
Connecting the Wiring module that uses is series wiring module 26, is accomplished that four capacitors are used in series at this time, when with capacitor wiring
The mating Wiring module that uses of connecting of plate 20 is accomplished that four capacitors are used in parallel for Wiring module 27 in parallel at this time, when with
The mating Wiring module used that connects of capacitor terminal plate 20 is series-parallel connection module 28, is accomplished that two capacitor parallel connections at this time
It is used in series with two capacitors, meets the demand to different voltages grade.Series-parallel connection module 28 can directly to its into
Row rotation is attached with capacitor terminal plate 20, when needing to select series wiring module 26 or parallel connection Wiring module 27 and capacitor
It, can be by Wiring module 27 in parallel or series wiring module 26 along the side where plate transaxle 35 when terminal plate 20 is attached
To being slided, slide to the Wiring module needed with the position where capacitor terminal plate 20 to corresponding, by Wiring module in parallel
27 or series wiring module 26 rotation make remaining capacitor terminal plate 20 connect.
The electric discharge device includes the driving mechanism that swing rod charge and discharge mechanism and driving swing rod charge and discharge mechanism are swung.It is described
Swing rod charge and discharge mechanism includes positive swing rod 6, cathode swing rod 7, charging fishplate bar and insulation barrier, and the insulation barrier is arranged just
Between pole swing rod 6 and cathode swing rod 7.Anode 6 bottom end of swing rod and 7 bottom end of cathode swing rod are rotatably installed in a bearing respectively
On seat 8, connecting shaft 5 is provided between the anode swing rod 6 and cathode swing rod 7, the both ends of the connecting shaft 5 are put with anode respectively
Bar 6 and cathode swing rod 7 are rotatablely connected.The insulation barrier includes upper insulation barrier 15 and lower insulation barrier 16, the upper insulation
Baffle 15 is located at 5 top of connecting shaft, and the lower insulation barrier 16 is located at 5 lower section of connecting shaft, is met just by setting insulation barrier
For the requirement of insulation distance between pole swing rod 6 and cathode swing rod 7.It is provided with and puts on the anode swing rod 6 and cathode swing rod 7
Electric contact and charging contact, are connected with capacitor connection line between the discharge contact and charging contact, the capacitor connection line with
The connection of capacitor output line, the discharge contact are connect with failure cable, and the charging contact is connect with charging fishplate bar, the charging
Fishplate bar is arranged on the track where charging contact is swung, and the length by changing charging fishplate bar can change the charging to capacitor
Duration.In prioritization scheme, the discharge contact is separately positioned on the top of positive swing rod 6 and cathode swing rod 7, the charging contact
It is separately positioned on the lower section of positive swing rod 6 and cathode swing rod 7.
The discharge contact and charging contact that the anode swing rod 6 is equipped with are respectively positive discharge contact 9 and anode charging touching
Point 14, the capacitor connection line between the positive discharge contact 9 and positive charging contact 14 are positive electrode capacitance connecting line 17.It is described
The discharge contact and charging contact that cathode swing rod 7 is equipped with are respectively negative discharge contact 10 and cathode charging contact 13, described negative
Capacitor connection line between pole discharge contact 10 and cathode charging contact 13 is negative electrode capacitance connecting line 18.The positive electrode capacitance connects
Wiring 17 is connect with positive electrode capacitance output line 24, and the cathode capacitor connection line 18 is connect with cathode capacitor output line 25.It is described
Positive discharge contact 9 is connect with the core wire of failure cable, and the negative discharge contact 10 is connect with ground wire.
The charging fishplate bar includes positive fishplate bar 11 and cathode charging fishplate bar 12, the anode charging fishplate bar 11 and the height of charging
The anode connection of potential source, the cathode charging fishplate bar 12 are connect with the cathode of high-voltage power supply, the anode charging contact 14 and anode
The fishplate bar 11 that charges connects, and the cathode charging contact 13 is connect with cathode charging fishplate bar 12.
The driving mechanism includes motor 1, runner 2 and push rod 3, and key connection has runner 2, institute on 1 output shaft of motor
It states and is connected with connecting rod 4 on runner 2, described 3 one end of push rod and connecting rod 4 are hinged, the other end and connecting shaft 5 of the push rod 3
Rotation connection.Power is provided by motor 1, runner 2 is driven to rotate, runner 2 pushes push rod 3 to do the front and back period while rotation
The reciprocating motion of property, that is, realize the periodic wobble of swing rod charge and discharge mechanism.Revolving speed by controlling motor 1 can change pendulum
The swing period of bar, that is, change discharge cycle, does not need the equipment such as additional control circuit and the time relay to electric discharge week
Phase is controlled, and safety is higher, and equipment operation is more stable.
A method of cable fault test, including following operating procedure are carried out using High-voltage Signal Generator:
1) capacitor of 4 16 microfarad 10000v is attached with one group of binding post respectively, capacitor connection line is defeated with capacitor
Outlet is attached, and driving motor operation drives swing rod charge and discharge mechanism to do periodic swing, swing rod charge and discharge mechanism runner
One circle of rotation, swing rod charge and discharge mechanism swing one back and forth, can control swing rod charge-discharge machine by controlling driving motor revolving speed
Structure swing period, that is, control discharge cycle length；When positive swing rod and cathode swing rod are rocked to the charged area of side simultaneously,
Complete the charging to capacitor, charging time 26-32s；With the side of positive swing rod and cathode swing rod simultaneously round about
When swinging certain angle, charging contact is disconnected with charging fishplate bar, and charging terminates；Positive swing rod and cathode swing rod are swung simultaneously
To the other side region of discharge when, the core wire of positive discharge contact and failure cable on positive swing rod connects, on cathode swing rod
Negative discharge contact connect with ground wire, capacitor discharges to failure cable, 2000 joules of impulse discharge energy, discharge time
0.3-0.5s；
2) position of fault point is determined by type cable failure positioning system；Type cable failure positioning system includes being placed on cable
More fixed point apparatus and host platform near fault point；Every fixed point apparatus is provided with multiple sensors can acquire cable simultaneously
The multi-signal of fault point release, and the signal that will test is transferred to the microprocessor being equipped in fixed point apparatus, passes through micro process
Device carries out signal processing；Microprocessor is also connected with wireless transport module, can be by data information by way of wireless transmission
It is transferred to host platform；Show the signal of every fixed point apparatus, signal of the host platform for multipoint acquisition respectively by host platform
It shown, analysis processing, compared, determine the position of fault point；The sensor being arranged on every fixed point apparatus includes acquisition magnetic field
The coil of signal, the vibrating sensor of collected sound signal and the probe for acquiring step voltage signal；By acquiring magnetic field signal
Coil, the shock sensor of voice signal and magnetic field signal, voice signal of the probe to failure cable of step voltage signal
Multi-point is carried out with step voltage signal to acquire simultaneously.
3) associated data analytical calculation is out of order a position, and step voltage determines the direction of fault point；Before fault point,
When electrion, the potential difference in every meter of length is negative (High-voltage Signal Generator application is negative high-voltage signal), explanation
Before fault point；Across after fault point, the potential difference in every meter of length becomes positive, and closer from fault point, signal is stronger；Magnetic
Field signal be also it is closer from fault point, signal is stronger；The vibration signal of sound is then delayed to determine by sound magnetic, sound magnetic delay time
It is shorter, it is closer from fault point；The sound of every fixed point apparatus receives signal time will be within 90-100 milliseconds；In this way, fixed point apparatus
Vibration signal within neighbouring 30 meters can receive.Fault point is within 30 meters, so that it may detect.If there is two or more
Probe collects sound magnetic signal, and can calculate the position of fault point: the sound magnetic delay of fixed point apparatus 1 is TI, the sound of fixed point apparatus 2
Magnetic delay is T2;Since the spread speed in magnetic field is the light velocity, the spread speed of sound only has more than 300 metre per second (m/s)s, it is possible to close
As think that T1, T2 are exactly the propagation time;On the ground, fault point to probe 1 distance be S1, fault point to pop one's head in 2 away from
From for S2;Assuming that distance is a meters between two fixed point apparatus, the buried depth of cable is h meters, and sound is when the spread speed in ground medium
For V, then S1+S2=a, S12=V2*T12-h2；S22=V2*T22-h2, can calculate the position S1 of fault point=
S2=。
When concrete operations are implemented, periodic swing, runner 2 do under the driving effect of motor 1 in swing rod charge and discharge mechanism
One circle of rotation, swing rod charge and discharge mechanism swing one back and forth.When positive swing rod 6 and cathode swing rod 7 are rocked to filling for side simultaneously
When electric region, i.e., charging contact is contacted with the charging fishplate bar being arranged on track where charging contact is swung, positive charging contact
14 connect with anode charging fishplate bar 11, and the cathode charging contact 13 is connect with cathode charging fishplate bar 12, and capacitor is filled in completion
Electricity.With positive swing rod 6 and cathode swing rod 7 simultaneously a side oscillation certain angle round about when, charging contact and charging
Fishplate bar disconnects, and charging terminates, and is between the mechanism of swing rod charge and discharge at this time and high-voltage power supply and is fully disconnected state.When anode is put
Positive discharge contact 9 and failure electricity when bar 6 and cathode swing rod 7 are rocked to the region of discharge of the other side simultaneously, on positive swing rod 6
The core wire of cable connects, and the negative discharge contact 10 on cathode swing rod 7 is connect with ground wire, and capacitor discharges to failure cable, with
The periodic wobble of positive swing rod 6 and cathode swing rod 7, discharge contact disconnected with failure cable, electric discharge terminates, and puts at this time
In state is fully disconnected between bar charge and discharge mechanism and failure cable, i.e. ground wire is also in off-state.Due to carry out
The moment of electric discharge is off-state between swing rod charge and discharge mechanism and high-voltage power supply, and high voltage will not feed back high-voltage power supply, to high pressure
Source damages, it is ensured that the normal operation of control section.Swing rod charge and discharge mechanism is filled using the periodic wobble of swing rod
Discharge process realizes being kept completely separate for charging operations and discharge operation in charge and discharge process, charging process and discharge process list
It solely carries out, there is no cross influences, it is ensured that the stability of whole equipment operation improves duration of service.Traditional
Position determination of fault method is: high-tension apparatus periodic discharging, and staff is repeatedly detected before and after the fault point of cable, searches fault point
Position.The method of the type cable failure positioning of innovation is: being placed around multiple fixed point apparatus, electrion equipment in Method of Cable Trouble Point
When electric discharge, multiple fixed point apparatus acquire multi-signal respectively, and are transferred to host platform.Show that every is determined respectively by host platform
The signal of point instrument, and compare, analyze, quickly determine the position of fault point.What it is due to the acquisition of multiple fixed point apparatus is with primary electricity
The discharge signal of cable failure, thus the signal of each fixed point apparatus reflect be different location the same source signal, exclude dry
After disturbing signal, the correlation of signal is very good.By the comparison of multi-point signal, analysis, calculates, can quickly determine the position of fault point
It sets.It greatly improves the efficiency, reduces labor intensity.When being pinpointed within 50 meters before and after fault point, as long as placing 3 fixed point apparatus,
It can substantially meet and realize that fault point electric discharge is primary, just can determine that the needs of the position of fault point.
The foregoing is merely illustrative of the preferred embodiments of the present invention, is not intended to limit the invention, all in essence of the invention
Within mind and principle, any modification, equivalent replacement, improvement and so on be should all be included in the protection scope of the present invention.
Claims (1)
1. a kind of cable fault test method, which is characterized in that including following operating procedure:
1) capacitor of 4 16 microfarad 10000v is attached with one group of binding post respectively, capacitor connection line and capacitor output line
It is attached, driving motor operation drives swing rod charge and discharge mechanism to do periodic swing, the rotation of swing rod charge and discharge mechanism runner
One circle, swing rod charge and discharge mechanism swing one back and forth, can control swing rod charge and discharge mechanism pendulum by controlling driving motor revolving speed
The dynamic period, that is, control discharge cycle length；When positive swing rod and cathode swing rod are rocked to the charged area of side simultaneously, complete
Charging to capacitor, charging time 26-32s；With the side oscillation of positive swing rod and cathode swing rod simultaneously round about
When certain angle, charging contact is disconnected with charging fishplate bar, and charging terminates；Positive swing rod and cathode swing rod are rocked to another simultaneously
When the region of discharge of side, the core wire of positive discharge contact and failure cable on positive swing rod is connected, negative on cathode swing rod
Pole discharge contact is connect with ground wire, and capacitor discharges to failure cable, and 2000 joules of impulse discharge energy, discharge time 0.3-
0.5s；
2) position of fault point is determined by type cable failure positioning system；Type cable failure positioning system includes being placed on cable fault
More fixed point apparatus and host platform near point；Every fixed point apparatus is provided with multiple sensors can acquire cable fault simultaneously
The multi-signal of point release, and the signal that will test is transferred to the microprocessor being equipped in fixed point apparatus, by microprocessor into
Row signal processing；Microprocessor is also connected with wireless transport module, data information can be transmitted by way of wireless transmission
To host platform；Show that the signal of every fixed point apparatus, host platform carry out the signal of multipoint acquisition respectively by host platform
Display, is compared at analysis processing, determines the position of fault point；The sensor being arranged on every fixed point apparatus includes acquisition magnetic field signal
Coil, collected sound signal vibrating sensor and acquire step voltage signal probe；
3) associated data analytical calculation is out of order a position, and step voltage determines the direction of fault point；Before fault point, high pressure
When electric discharge, the potential difference in every meter of length be it is negative, illustrate before fault point；Electricity across after fault point, in every meter of length
Potential difference becomes positive, closer from fault point, and signal is stronger；Magnetic field signal be also it is closer from fault point, signal is stronger；The shake of sound
Dynamic signal is then delayed by sound magnetic to determine, sound magnetic delay time is shorter, closer from fault point；The sound of every fixed point apparatus receives letter
Number time will be within 90-100 milliseconds；In this way, the vibration signal near fixed point apparatus within 30 meters can receive；Fault point exists
Within 30 meters, so that it may detect；If there is two or more probe collects sound magnetic signal, the position of fault point can be calculated
Set: the sound magnetic delay of fixed point apparatus 1 is TI, and the sound magnetic delay of fixed point apparatus 2 is T2；Since the spread speed in magnetic field is the light velocity, sound
Spread speed there was only more than 300 metre per second (m/s)s, it is possible to approximately think that T1, T2 are exactly the propagation time；On the ground, fault point
Distance to probe 1 is S1, and the distance of fault point to probe 2 is S2；Assuming that distance is a meters between two fixed point apparatus, cable
Buried depth is h meters, and sound is being V when the spread speed in ground medium, then S1+S2=a, S12=V2*T12-h2；S22=V2*
T22-h2, the position of fault point can be calculated
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| CN109655714B (en) * | 2019-01-22 | 2021-10-08 | 西安电子科技大学 | Double-sensor cable fault fixed-point detection system and method and cable detection platform |
| CN109946568B (en) * | 2019-04-12 | 2024-08-02 | 西京学院 | Detection device and detection method based on power line communication system |
| CN110620024A (en) * | 2019-07-08 | 2019-12-27 | 保定钰鑫电气科技有限公司 | Switch of asymmetric current source and asymmetric current source |
| CN110634713A (en) * | 2019-07-08 | 2019-12-31 | 保定钰鑫电气科技有限公司 | Instantaneous switch for asymmetric current source |
| CN111624437B (en) * | 2020-04-18 | 2021-07-30 | 西安电子科技大学 | Integrated comprehensive underground cable maintenance detection method, detection system and detection instrument |
| CN111856208B (en) * | 2020-07-17 | 2023-09-19 | 山东科汇电力自动化股份有限公司 | Device and method for positioning fault point of ultra-high voltage cable sheath |
| CN113589004B (en) * | 2021-08-05 | 2024-02-02 | 淄博信易杰电气有限公司 | High-voltage signal generator |
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