CN206311700U - A kind of cable Sasser partial discharge test device - Google Patents
A kind of cable Sasser partial discharge test device Download PDFInfo
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- CN206311700U CN206311700U CN201621296825.3U CN201621296825U CN206311700U CN 206311700 U CN206311700 U CN 206311700U CN 201621296825 U CN201621296825 U CN 201621296825U CN 206311700 U CN206311700 U CN 206311700U
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- sasser
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Abstract
The utility model discloses a kind of cable Sasser partial discharge test device of power equipment technical field of measurement and test,The right-hand member of the first resistor is connected with air-core inductor by lead,The left end of the air-core inductor is connected with solid-state switch by lead,The top of the air-core inductor is connected with high-voltage bleeder by lead,The left end of the high-voltage bleeder is connected with second resistance by lead,The left end of the high-voltage bleeder is connected with capacitor by lead,Sasser partial discharge test device is mainly for detection of cable major insulation,The insulation status of joint and terminal,Using damped vibration voltage tester partial discharge intensity,And solid-state switch of short duration closure after charging process terminates,A concussion loop is formed between the electric capacity and the inductance of internal system of tested cable,It is final to form a damped vibration sine voltage on tested cable,Its waveform and frequency are close to power frequency sine wave in detection process,Will not tested cable be caused to damage.
Description
Technical field
The utility model is related to power equipment technical field of measurement and test, specially a kind of cable Sasser partial discharge test device.
Background technology
In power system, the usual method of testing for judging cable insulation quality is high to tested cable insulation applying direct current
Pressure, detects the size of DC leakage-current, but, this method is only capable of making diagnosis to cable integral insulation situation, it is impossible to right
Partial discharge position is positioned, it is often more important that, DC break down voltage experiment is actually a kind of destructive testing, especially to being crosslinked poly- second
Alkene (XLPE) cable, the molecule of polarized state is still maintain due to one section of period inner insulating layer after high direct voltage is removed
Arrangement, particularly in various dendritic structures generate because aging, its molecules align is more difficult to return to that to apply direct current high
State before pressure, therefore through the qualified cable of DC break down voltage experimental test, after putting into operation again insulation occurs quickly hits
The example for wearing accident is of common occurrence, therefore, we have proposed a kind of cable Sasser partial discharge test device.
Utility model content
The purpose of this utility model is to provide a kind of cable Sasser partial discharge test device, to solve above-mentioned background technology
Middle proposition cannot carry out positioning and easily to being tested the problem that damages of cable to partial discharge position.
To achieve the above object, the utility model provides following technical scheme：A kind of cable Sasser partial discharge test device,
Including body, the bottom left and right sides of the body is provided with roller, and the left bottom of the body is provided with voltage source and connects
Mouthful, the bottom right side of the body is provided with cable interface to be measured, heat emission fan is provided with the left of the body, the body
Top is provided with computer control, and the surface of the computer control is provided with display screen, and the bottom of the display screen sets
Operation keyboard is equipped with, the surface of the computer control is provided with start key, and start key is located at the left side of display screen, described
The surface of computer control is provided with stop key, and stop key is located at the top of start key, and the inner chamber of the body is provided with
First resistor, and the left end of first resistor is connected by lead with the right-hand member of voltage supply interface, the right-hand member of the first resistor leads to
Cross lead and be connected with air-core inductor, and the right-hand member of air-core inductor is connected by lead with the left end of cable interface to be measured, institute
The left end for stating air-core inductor is connected with solid-state switch by lead, and the bottom of solid-state switch passes through wire ground, the sky
The top of electrocardio sensor is connected with high-voltage bleeder by lead, and the left end of the high-voltage bleeder is connected with second by lead
Resistance, the left end of the high-voltage bleeder is connected with capacitor by lead, and capacitor is located at the right side of second resistance, described
The top of capacitor is connected with Digital Signal Processing card by lead, and the top of the Digital Signal Processing card is connected by lead
There is wave filter, and wave filter is located at the inner cavity top of body, the top of the second resistance is connected by lead with wave filter.
Preferably, the roller is double-brake castor.
Preferably, the solid-state switch is high-pressure solid-state switch.
Preferably, the wave filter is panel wave filter.
Compared with prior art, the beneficial effects of the utility model are：Sasser partial discharge test device mainly for detection of
The insulation status of cable major insulation, joint and terminal, using damped vibration voltage tester partial discharge intensity, and combine computer controls
Partial discharge location system in device realizes the detection of partial discharge, and the ground connection by solid-state switch and the interference protection measure of wave filter, energy
Accurately detect Partial discharge signal, and solid-state switch of short duration closure after charging process terminates, tested cable electric capacity and
A concussion loop is formed between the inductance of internal system, a damped vibration sine wave electricity is finally formed on tested cable
Pressure, its waveform and frequency are close to power frequency sine wave in detection process, and action time is short, will not tested cable be caused to damage.
Brief description of the drawings
Fig. 1 is the utility model structural representation.
In figure：1 body, 2 rollers, 3 voltage supply interfaces, 4 cable interfaces to be measured, 5 heat emission fans, 6 computer controls, 7 show
Display screen, 8 operation keyboards, 9 start keys, 10 stop keys, 11 first resistors, 12 air-core inductors, 13 solid-state switches, 14 high pressure partial pressures
Device, 15 second resistances, 16 capacitors, 17 Digital Signal Processing cards, 18 wave filters.
Specific embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, the technical scheme in the utility model embodiment is carried out
Clearly and completely describe, it is clear that described embodiment is only a part of embodiment of the utility model, rather than whole
Embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not under the premise of creative work is made
The every other embodiment for being obtained, belongs to the scope of the utility model protection.
Fig. 1 is referred to, the utility model provides a kind of technical scheme：A kind of cable Sasser partial discharge test device, including
Body 1, the bottom left and right sides of body 1 is provided with roller 2, facilitates the left bottom of the movement of device, body 1 to be provided with electricity
Potential source interface 3, for connecting high-voltage power supply, the bottom right side of body 1 is provided with cable interface 4 to be measured, for connecting tested cable,
The left side of body 1 is provided with heat emission fan 5, and device is radiated, and the top of body 1 is provided with computer control 6, can be right
Measurement data is analyzed and stores, and the surface of computer control 6 is provided with display screen 7, the conveniently observation to measurement data,
The bottom of display screen 7 is provided with operation keyboard 8, and the surface of computer control 6 is provided with start key 9, and start key 9 is located at and shows
The left side of display screen 7, the surface of computer control 6 is provided with stop key 10, and stop key 10 is located at the top of start key 9, this
The inner chamber of body 1 is provided with first resistor 11, and the left end of first resistor 11 is connected by lead with the right-hand member of voltage supply interface 3,
The right-hand member of first resistor 11 is connected with air-core inductor 12 by lead, and air-core inductor 12 right-hand member by lead with it is to be measured
The left end connection of cable interface 4, can produce damped vibration ripple to measure tested cable, and the left end of air-core inductor 12 leads to
Cross lead and be connected with solid-state switch 13, and the bottom of solid-state switch 13 passes through wire ground, it is ensured that test device is connected and is grounded
Electro Magnetic Compatibility, it is to avoid unnecessary loop, reduce electromagnetic interference influence, make Partial Discharge Detection more accurate, hollow electricity
The top of sensor 12 is connected with high-voltage bleeder 14 by lead, and the left end of high-voltage bleeder 14 is connected with the second electricity by lead
Resistance 15, the left end of high-voltage bleeder 14 is connected with capacitor 16 by lead, and capacitor 16 is located at the right side of second resistance 15,
Voltage and coupled capacitor for measuring damped vibration ripple, the top of capacitor 16 is connected with Digital Signal Processing card by lead
17, the top of Digital Signal Processing card 17 is connected with wave filter 18 by lead, and wave filter 18 is located at the inner chamber top of body 1
Portion, can be filtered to measurement data, and the top of second resistance 15 is connected by lead with wave filter 18.
Wherein, roller 2 is double-brake castor, can make to play the effect of stabilization during this device busy, and solid-state switch 13 is
High-pressure solid-state switch, operating efficiency is good in this device, is quick on the draw, and wave filter 18 is panel wave filter, due to being mounted directly
In cabinet panel, ground connection is good, and the interference on cable is filtered out on cabinet port.
Operation principle：During work, the heat that heat emission fan 5 is produced when can work this device is evacuated, high-voltage power supply with
Voltage supply interface 3 is connected, and tested cable is connected with cable interface 4 to be measured, is pressed start key 9 and is started this device, by high-voltage power supply
Tested cable and line loop are pressurizeed, now solid-state switch 13 is off-state, the Bottom ground of solid-state switch 13
Setting, it is ensured that test device connect and ground connection Electro Magnetic Compatibility, it is to avoid unnecessary loop, reduce electromagnetic interference shadow
Ring, make Partial Discharge Detection more accurate, after voltage is increased to the highest test voltage of setting, pressurization is completed, according to cable capacitive
At this moment principle, the closure that solid-state switch 13 can be of short duration, is sent out by first resistor 11 and air-core inductor 12 with tested cable capacitance
LC resonance is given birth to, resonant frequency isBoth damped vibration voltage, and tested electricity were produced in tested cut cable
Cable capacitance and air-core inductor 12 can form a LC concussions loop, and at this moment high-voltage power supply can be disconnected with loop, loop
In inductance and electric capacity can produce concussion frequency, and shown by display screen 7, principle is shaken according to LCThe meter of partial discharge and dielectric loss is carried out by 6 pairs of tested cables of computer control in this stage
Calculate, dielectric loss value can be by the attenuation characteristic survey calculation of damped vibration alternating voltage waveform out, due to electric pulse in cable
Spread speed relative to determine cable insulation pattern be known constant, according to electric pulse reach test lead time difference can
There is position to calculate shelf depreciation, second resistance 15 and capacitor 16 form PD coupled capacitors, high-voltage bleeder 14 and PD
Coupled capacitor is used to measure damped vibration wave voltage and coupling PD signals, is carried out measurement data by Digital Signal Processing card 17
Wave filter 18 is processed and sent to, the signal beyond measurement frequency is effectively filtered out by wave filter 18, a spy is obtained
The power supply signal for determining frequency sends computer control 6 to, and computer control 6 is interior to be provided with a high pressure entirely without partial discharge point
Depressor and a PD coupled capacitor, can compare to confirm measurement result with the numerical value for measuring, the operation of this device
Measurement carries out DATA REASONING, analyzes and deposit by the analysis and Control software installed in operation keyboard 8 and computer control 6
Storage, Data Comparison is carried out to facilitate during double measurement, measurement closes this device after terminating by stop key 10.
While there has been shown and described that embodiment of the present utility model, for the ordinary skill in the art,
It is appreciated that these embodiments can be carried out various changes in the case where principle of the present utility model and spirit is not departed from, repaiies
Change, replace and modification, scope of the present utility model is defined by the appended claims and the equivalents thereof.
Claims (4)
1. a kind of cable Sasser partial discharge test device, including body (1), it is characterised in that：Bottom of the body (1) or so
Both sides are provided with roller (2), and the left bottom of the body (1) is provided with voltage supply interface (3), the right side of the body (1)
Side bottom is provided with cable interface (4) to be measured, and heat emission fan (5), the top of the body (1) are provided with the left of the body (1)
Portion is provided with computer control (6), and the surface of the computer control (6) is provided with display screen (7), the display screen
(7) bottom is provided with operation keyboard (8), and the surface of the computer control (6) is provided with start key (9), and start key
(9) positioned at the left side of display screen (7), the surface of the computer control (6) is provided with stop key (10), and stop key (10)
Positioned at the top of start key (9), the inner chamber of the body (1) is provided with first resistor (11), and first resistor (11) left end
It is connected with the right-hand member of voltage supply interface (3) by lead, the right-hand member of the first resistor (11) is connected with hollow electricity by lead
Sensor (12), and the right-hand member of air-core inductor (12) is connected by lead with the left end of cable interface (4) to be measured, the hollow electricity
The left end of sensor (12) is connected with solid-state switch (13) by lead, and the bottom of solid-state switch (13) passes through wire ground, institute
The top for stating air-core inductor (12) is connected with high-voltage bleeder (14) by lead, and the left end of the high-voltage bleeder (14) leads to
Cross lead and be connected with second resistance (15), the left end of the high-voltage bleeder (14) is connected with capacitor (16) by lead, and
Capacitor (16) is connected with data signal positioned at the right side of second resistance (15), the top of the capacitor (16) by lead
Reason card (17), the top of the Digital Signal Processing card (17) is connected with wave filter (18), and wave filter (18) position by lead
In the inner cavity top of body (1), the top of the second resistance (15) is connected by lead with wave filter (18).
2. a kind of cable Sasser partial discharge test device according to claim 1, it is characterised in that：The roller (2) is
Double-brake castor.
3. a kind of cable Sasser partial discharge test device according to claim 1, it is characterised in that：The solid-state switch
(13) it is high-pressure solid-state switch.
4. a kind of cable Sasser partial discharge test device according to claim 1, it is characterised in that：The wave filter (18)
It is panel wave filter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621296825.3U CN206311700U (en) | 2016-11-30 | 2016-11-30 | A kind of cable Sasser partial discharge test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621296825.3U CN206311700U (en) | 2016-11-30 | 2016-11-30 | A kind of cable Sasser partial discharge test device |
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| Publication Number | Publication Date |
|---|---|
| CN206311700U true CN206311700U (en) | 2017-07-07 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621296825.3U Active CN206311700U (en) | 2016-11-30 | 2016-11-30 | A kind of cable Sasser partial discharge test device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108776290A (en) * | 2018-08-20 | 2018-11-09 | 安徽国锦电力工程有限公司 | A kind of cable Sasser testing equipment and its application method |
| CN109375080A (en) * | 2018-12-07 | 2019-02-22 | 华北电力大学（保定） | A kind of the DC earthing electric branch pilot system and method for Programmable and Variable ground resistance |
-
2016
- 2016-11-30 CN CN201621296825.3U patent/CN206311700U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108776290A (en) * | 2018-08-20 | 2018-11-09 | 安徽国锦电力工程有限公司 | A kind of cable Sasser testing equipment and its application method |
| CN109375080A (en) * | 2018-12-07 | 2019-02-22 | 华北电力大学（保定） | A kind of the DC earthing electric branch pilot system and method for Programmable and Variable ground resistance |
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