CN108279366A - The distributed detection method for local discharge and device of high-tension cable pressure test - Google Patents
The distributed detection method for local discharge and device of high-tension cable pressure test Download PDFInfo
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- CN108279366A CN108279366A CN201810362055.5A CN201810362055A CN108279366A CN 108279366 A CN108279366 A CN 108279366A CN 201810362055 A CN201810362055 A CN 201810362055A CN 108279366 A CN108279366 A CN 108279366A
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- local discharge
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- shelf depreciation
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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
- G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
- G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
- G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
- G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
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Abstract
The present invention relates to a kind of distributed detection method for local discharge of high-tension cable pressure test and devices, and the method comprising the steps of：Sheath grounding current of the threephase cable of high-tension cable when carrying out pressure test is obtained respectively；The sheath grounding current of threephase cable is compared with the threshold value of setting；If the sheath grounding current of threephase cable is more than the threshold value of setting, the local discharge signal for the threephase cable that the local discharge sensor of threephase cable measures is obtained；Shelf depreciation state of the threephase cable of high-tension cable when carrying out pressure test is determined according to the local discharge signal of threephase cable.Above-mentioned detection method, which realizes, measures the local discharge signal during high-tension cable pressure test, sheath grounding current is judged using the threshold value of setting, the data volume for measuring local discharge signal is had compressed, the working efficiency being detected to the shelf depreciation of high-tension cable is improved.A kind of distributed partial discharge detecting system of high-tension cable pressure test is also provided.
Description
Technical field
The present invention relates to high-tension cable technical fields, more particularly to a kind of distribution part of high-tension cable pressure test
Discharge detection method, high-tension cable pressure test distributed local discharge detection device and high-tension cable pressure test distribution
Formula partial discharge detecting system.
Background technology
With the rapid development of power grid and electricity consumption cause, the operation and maintenance of high-tension cable are paid attention in electric system further,
Research hotspot is increasingly becoming for the state-detection of high-tension cable.High-tension cable carries out while carrying out handing-over pressure test
Distributed Partial Discharge Detection is to judge cable system construction quality and the efficiency test method of quality of insulation at present.
The mode of optical-fibre communications or GPRS communications is mainly utilized in currently used distribution method for measurement of partial discharge
The electric power data of the high-tension cable of collection in worksite is fed back into background analysis system and carries out Partial Discharge Detection, however this mode
Often due to the data volume of acquisition is larger, cause the Partial Discharge Detection efficiency to high-tension cable relatively low；And due to high-voltage electricity
The system of laying of cable is various, such as has the modes such as directly buried installation, cable duct laying, tunnel laying, aerial laying and water-bed laying,
For the cable of aerial laying or water-bed laying, enforcement difficulty is very big for this, and GPRS communication modes to cable connector at
Communication signal quality requirement is higher, for tunnel lay or from base station farther out cable for, it is also difficult to implement.
Invention content
Based on this, it is necessary to for the problem that traditional technology detection efficiency is relatively low, provide a kind of high-tension cable pressure test
Distributed detection method for local discharge, high-tension cable pressure test distributed local discharge detection device and high-tension cable it is resistance to
Press the distributed partial discharge detecting system of experiment.
A kind of distributed detection method for local discharge of high-tension cable pressure test, including step：
Sheath grounding current of the threephase cable of high-tension cable when carrying out pressure test is obtained respectively；
The sheath grounding current of the threephase cable is compared with the threshold value of setting；If the sheath of the threephase cable
Earth current is more than the threshold value of setting, then obtains the threephase cable that the local discharge sensor of the threephase cable measures
Local discharge signal；
Determine that the threephase cable of the high-tension cable is carrying out pressure-resistant examination according to the local discharge signal of the threephase cable
Shelf depreciation state when testing.
The distributed detection method for local discharge of above-mentioned high-tension cable pressure test obtains the three-phase electricity of high-tension cable respectively
The sheath grounding current is compared with the threshold value of setting, works as three-phase by sheath grounding current of the cable when carrying out pressure test
By local discharge sensor to the local discharge signal of threephase cable when the sheath grounding current of cable is more than the threshold value of setting
It measures, shelf depreciation state of the threephase cable in pressure test is determined according to the local discharge signal, is realized to height
Local discharge signal during voltage cable pressure test measures, and is sentenced to sheath grounding current using the threshold value of setting
It is disconnected, the data volume for measuring local discharge signal is had compressed, the work effect being detected to the shelf depreciation of high-tension cable is improved
Rate.
In one embodiment, the sheath of the threephase cable of high-tension cable when carrying out pressure test that obtain respectively connects
The step of earth-current includes：
When the high-tension cable carries out pressure test, the three-phase electricity is detected by multiple high frequency partial discharge sensors
The sheath grounding current of cable；Wherein, the cable that the multiple high frequency partial discharge sensor is respectively arranged on the threephase cable connects
On the sheath ground wire of head.
In one embodiment, the sheath for detecting the threephase cable by multiple high frequency partial discharge sensors connects
The step of earth-current includes：
The three-phase that the multiple high frequency partial discharge sensor measures is received by multichannel shelf depreciation recorder
The current signal of the sheath ground wire of cable, obtains the sheath grounding current of the threephase cable of the high-tension cable；Wherein, described
Each input channel of multichannel shelf depreciation recorder is respectively connected to the multiple high frequency partial discharge sensor.
In one embodiment, further include step：
To multiple unified clock synchronization is carried out with the high frequency partial discharge sensor connecting multi-channel shelf depreciation recorder.
In one embodiment, it if the sheath grounding current of the threephase cable is more than the threshold value of setting, obtains
The step of local discharge signal for the threephase cable that the local discharge sensor of the threephase cable measures includes：
When the sheath grounding current of any phase cable of the threephase cable is more than the threshold value of the setting, then pass through described
The local discharge sensor of threephase cable measures the local discharge signal of the threephase cable of the high-tension cable.
In one embodiment, the local discharge signal according to the threephase cable determines the three of the high-tension cable
The step of shelf depreciation state of the phase cable when carrying out pressure test includes：
The shelf depreciation class of the threephase cable is determined according to the local discharge signal of the threephase cable of the high-tension cable
Type and discharge defect position；The three-phase of the high-tension cable is obtained according to the shelf depreciation type and discharge defect position
Shelf depreciation state of the cable when carrying out pressure test.
In one embodiment, the local discharge signal of the threephase cable according to the high-tension cable determines described three
The step of shelf depreciation type of phase cable and discharge defect position includes：
Local discharge signal of the threephase cable of the high-tension cable under same markers is compared, determines the office
Portion's electric discharge type；According to the amplitude of the local discharge signal of the adjacent measurement points of the threephase cable of the high-tension cable, institute is determined
State discharge defect position；Wherein, the measurement point is the shelf depreciation for measuring the threephase cable on the high-tension cable
The position of signal.
In one embodiment, a kind of distributed local discharge detection device of high-tension cable pressure test is provided, it should
Detection device includes：
Acquisition module, for obtaining sheath ground connection electricity of the threephase cable of high-tension cable when carrying out pressure test respectively
Stream；
Comparison module, for the sheath grounding current of the threephase cable to be compared with the threshold value of setting；If described
The sheath grounding current of threephase cable is more than the threshold value of setting, then the local discharge sensor for obtaining the threephase cable measures
The threephase cable local discharge signal；
Determining module, the threephase cable for determining the high-tension cable according to the local discharge signal of the threephase cable
Shelf depreciation state when carrying out pressure test.
The distributed local discharge detection device of above-mentioned high-tension cable pressure test, high pressure is obtained by acquisition module respectively
Sheath grounding current of the threephase cable of cable when carrying out pressure test, using comparison module by the sheath grounding current with set
Fixed threshold value is compared, and passes through local discharge sensor pair when the sheath grounding current of threephase cable is more than the threshold value of setting
The local discharge signal of threephase cable measures, and determines threephase cable resistance to according to the local discharge signal by determining module
Shelf depreciation state in pressure experiment, realizes and is measured to the local discharge signal during high-tension cable pressure test, profit
Sheath grounding current is judged with the threshold value of setting, the data volume for measuring local discharge signal is had compressed, improves to height
The working efficiency that the shelf depreciation of voltage cable is detected.
In one embodiment, a kind of distributed partial discharge detecting system of high-tension cable pressure test is provided, it should
Detecting system includes：Local discharge sensor on the threephase cable of high-tension cable, shelf depreciation recorder, intelligent terminal
And background server；Wherein,
The signal input part of the shelf depreciation recorder is connected to the local discharge sensor, for recording the office
The electric signal that portion's discharge sensor measures；Wherein, the electric signal includes that the threephase cable of the high-tension cable is carrying out pressure resistance
Sheath grounding current when experiment and local discharge signal；
The intelligent terminal, for exporting the telecommunications that the shelf depreciation recorder records from the shelf depreciation recorder
Number, and by radio communication mode by the electric signal transmission to the background server；
The background server is configured as executing point of the high-tension cable pressure test described in as above any one embodiment
Cloth detection method for local discharge detects shelf depreciation shape of the threephase cable of the high-tension cable when carrying out pressure test
State.
The distributed partial discharge detecting system of above-mentioned high-tension cable pressure test includes the three-phase electricity set on high-tension cable
Local discharge sensor on cable, shelf depreciation recorder, intelligent terminal and background server, shelf depreciation recorder record
Sheath grounding current and local discharge signal of the threephase cable that local discharge sensor measures when carrying out pressure test, intelligence
Terminal is from shelf depreciation recorder export sheath grounding current and local discharge signal and after mode is transmitted to by radio communication
Platform server, background server according to the sheath grounding current and local discharge signal detect the threephase cable of high-tension cable into
Shelf depreciation state when row pressure test, realizes and is surveyed to the local discharge signal during high-tension cable pressure test
Amount, judges sheath grounding current using the threshold value of setting, has compressed the data volume for measuring local discharge signal, improves
The working efficiency that the shelf depreciation of high-tension cable is detected.
In one embodiment, the local discharge sensor includes multigroup high frequency partial discharge sensor；Wherein, every group
High frequency partial discharge sensor includes four high frequency partial discharge sensors, is respectively arranged at the cable connector of the threephase cable
Sheath ground wire is upper and the cable connector near；
The shelf depreciation recorder includes multiple four-way shelf depreciation recorders；Each four-way shelf depreciation
Recorder is connected by four high frequency partial discharge sensors of coaxial cable for high frequency and each group high frequency partial discharge sensor respectively
It connects.
Description of the drawings
Fig. 1 is the application environment of the distributed detection method for local discharge of one embodiment medium and high voltage cable pressure test
Figure；
Fig. 2 is the flow chart of the distributed detection method for local discharge of one embodiment medium and high voltage cable pressure test；
Fig. 3 is the structure diagram of the distributed local discharge detection device of one embodiment medium and high voltage cable pressure test；
Fig. 4 is the structural representation of the distributed partial discharge detecting system of one embodiment medium and high voltage cable pressure test
Figure；
Fig. 5 is the flow chart of the distributed detection method for local discharge of another embodiment medium and high voltage cable pressure test.
Specific implementation mode
The distributed detection method for local discharge of high-tension cable pressure test provided by the invention, can be applied to such as Fig. 1
Shown in application environment, Fig. 1 is the distributed detection method for local discharge of one embodiment medium and high voltage cable pressure test
Applied environment figure, high-tension cable 100 include A phase cable 100a, B phase cable 100b and C phase cable 100c, are distinguished on threephase cable
Equipped with cable connector 200 cable connector 200 can be separately mounted to when the high-tension cable carries out pressure resistance experiment by multiple
The local discharge sensor 300 at place measures the sheath of the local discharge signal of threephase cable, ambient noise signal and threephase cable
The electric signals such as earth current signal, the electrical signal detection that background analysis system 20 can be measured according to local discharge sensor 300
The shelf depreciation situation of the pressure test of the threephase cable of high-tension cable.Wherein, background analysis system 20 can by computer,
The server cluster of independent server either multiple servers composition is realized.
In one embodiment, a kind of distributed detection method for local discharge of high-tension cable pressure test is provided, such as
Shown in Fig. 2, Fig. 2 is the flow chart of the distributed detection method for local discharge of one embodiment medium and high voltage cable pressure test, with
This method is applied to illustrate for background analysis system as shown in Figure 1, the distributed office of the high-tension cable pressure test
Portion's discharge detection method may comprise steps of：
Step S101 obtains sheath grounding current of the threephase cable of high-tension cable when carrying out pressure test respectively.
In this step, sheath grounding current refers to that A, B, C threephase cable sheath at the cable connector of high-tension cable connect
Electric current on ground wire, when the threephase cable of high-tension cable carries out pressure resistance experiment, background analysis system 20 can obtain height respectively
The sheath of the A phases cable of voltage cable, B phases cable and C phase cables connect wires on sheath grounding current.
The sheath grounding current of threephase cable is compared by step S102 with the threshold value of setting；If the shield of threephase cable
Layer earth current is more than the threshold value of setting, then obtains the part for the threephase cable that the local discharge sensor of threephase cable measures
Discharge signal.
Can by background analysis system 20 by threephase cable sheath grounding current that step S101 is obtained with preset
Good threshold value is compared, if the numerical value of the sheath grounding current of threephase cable is more than the threshold value, by threephase cable
Local discharge sensor measure the local discharge signal of the threephase cable, wherein the shelf depreciation passed through on threephase cable passes
Sensor can measure the local discharge signal of any phase cable of high-tension cable, such as pass through the part on A phase cables
Discharge sensor can measure the local discharge signal of A phase cables, improve the threephase cable sheath grounding current to high-tension cable
The flexibility analyzed and validity.
Step S103 determines that the threephase cable of high-tension cable is carrying out pressure-resistant examination according to the local discharge signal of threephase cable
Shelf depreciation state when testing.
In this step, the three-phase that background analysis system 20 is measured using the local discharge sensor being set on threephase cable
The local discharge signal of cable carries out analyzing and diagnosing to the local discharge signal of the threephase cable during pressure test, to
Determine shelf depreciation situation of the threephase cable of the high-tension cable when carrying out pressure test.
The distributed detection method for local discharge of above-mentioned high-tension cable pressure test obtains each the three of high-tension cable respectively
The sheath grounding current is compared by sheath grounding current of the phase cable when carrying out pressure test with the threshold value of setting, when
The sheath grounding current of threephase cable puts the part of the threephase cable by local discharge sensor when being more than the threshold value of setting
Electric signal measures, and office of the high pressure threephase cable in pressure test is determined according to the local discharge signal of each phase cable
Portion's discharge condition is realized and is measured to the local discharge signal during high-tension cable pressure test, utilizes the threshold value of setting
Sheath grounding current is judged, the data volume for measuring local discharge signal is had compressed, improves the office to high-tension cable
Discharge the working efficiency being detected in portion.
In one embodiment, step S101 obtains the threephase cable of high-tension cable when carrying out pressure test respectively
The step of sheath grounding current may include：
When high-tension cable carries out pressure test, the threephase cable is detected by multiple high frequency partial discharge sensors
Sheath grounding current.
The present embodiment is mainly to be grounded electricity to the sheath of the threephase cable of high-tension cable using high frequency partial discharge sensor
Stream is detected, wherein and the high frequency partial discharge sensor can be set on the sheath ground wire of the cable connector of threephase cable,
When the high-tension cable carries out pressure test, the sheath that threephase cable can be measured by the high frequency partial discharge sensor is grounded
The quantity of electric current, high frequency partial discharge sensor can be multiple, and each high frequency partial discharge sensor can be respectively arranged on A, B
On the sheath ground wire of each cable connector of C threephase cables, the shield at each cable connector to obtain threephase cable
Layer earth current is conducive to the accuracy for improving the sheath grounding current data for measuring threephase cable, is also beneficial to improve to three
The accuracy of the shelf depreciation situation detection of phase cable.
In one embodiment, further, step S101 by multiple high frequency partial discharge sensors detection described in
The step of sheath grounding current of threephase cable may include：
The shield for the threephase cable that multiple high frequency partial discharge sensors measure is received by multichannel shelf depreciation recorder
The current signal of layer ground wire, obtains the sheath grounding current of the threephase cable of high-tension cable.
In the present embodiment, multichannel shelf depreciation recorder can be used for carrying out the signal of high frequency partial discharge sensor
It measures and record, the multichannel shelf depreciation recorder may include multiple signal input channels, each input channel can be with
It is attached, such as can be distinguished by coaxial cable for high frequency with each high frequency partial discharge sensor on threephase cable
Multiple high frequency partial discharge sensors are connected to the signal input channel of multichannel shelf depreciation recorder.
In one embodiment, the distributed Partial Discharge Detection side of the high-tension cable pressure test described in above-described embodiment
Method can also include the following steps：
It connect each multichannel shelf depreciation recorder to the multiple with the high frequency partial discharge sensor and unites
One clock synchronization.
The present embodiment is mainly considered, since the cable connector quantity of threephase cable is more, to be set to threephase cable joint
Local discharge sensor it is also corresponding more, it is possible to by multiple multichannel shelf depreciation recorders by each shelf depreciation
Sensor is attached, such as the high frequency partial discharge sensor of multiple threephase cables is connected to multichannel nearby and is locally put
At electrographic recording instrument, by be arranged multiple multichannel shelf depreciation recorders can effectively by each high frequency partial discharge sensor into
Row grouping connection, the present embodiment can be each multichannel office being attached with different grouping high frequency partial discharge sensor
Portion's electric discharge recording instrument carries out unified clock synchronization, to ensure the uniformity of data that each multichannel shelf depreciation recorder is acquired,
To improve the accuracy for measuring local discharge signal data, it is also beneficial to improve the shelf depreciation state of detection high-tension cable
Accuracy.
In one embodiment, it if the sheath grounding current of the threephase cable of step S102 is more than the threshold value of setting, obtains
The step of local discharge signal for taking the threephase cable that the local discharge sensor of threephase cable measures may include：
When threephase cable any phase cable sheath grounding current be more than setting threshold value, then pass through the office of threephase cable
Portion's discharge sensor measures the local discharge signal of the threephase cable of high-tension cable.
In the present embodiment, when the sheath grounding current of any phase cable in the threephase cable of acquisition is more than the threshold value of setting
When, then by the local discharge sensor on threephase cable to the local discharge signal of A, B, C threephase cable carry out into
Row measures, i.e., the local discharge signal of threephase cable is obtained by the local discharge sensor on each phase cable.
Multichannel shelf depreciation recorder can be started in real time to carry out sheath grounding current by local discharge sensor
It measures, it is automatic to start multichannel shelf depreciation note when any phase cable sheath earth current measured value is more than the threshold value of setting
Record the measurement of partial discharge module in instrument, the shelf depreciation measured local discharge sensor using the measurement of partial discharge module
Signal, ambient noise signal and sheath grounding current signal are measured and are recorded, if detecting, threephase cable sheath is grounded
Current measurement value is less than the threshold value of setting, then controls multichannel shelf depreciation recorder and enter standby mode.
Using the technical solution of above-described embodiment, the ground connection circulating current of any phase cable of high-tension cable is examined
It surveys, when the ground connection circulating current of any phase cable is more than threshold value, measures the local discharge signal of each phase cable so that in high pressure
During cable carries out pressure test, when carrying out commutation pressurization after the completion of the pressure test of single-phase cable, to multichannel part
The working condition of electric discharge recording instrument switches over, and is ensureing that the while of measuring the accuracy of local discharge signal data also reduces
Shelf depreciation recorder operating power consumption when measuring local discharge signal.
In one embodiment, the local discharge signal according to threephase cable of step S103 determines the three-phase of high-tension cable
The step of shelf depreciation state of the cable when carrying out pressure test may include：
The shelf depreciation type of threephase cable is determined according to the local discharge signal of the threephase cable of high-tension cable and is put
Electric defect position；The threephase cable that high-tension cable is obtained according to shelf depreciation type and discharge defect position is carrying out pressure-resistant examination
Shelf depreciation state when testing.
In the present embodiment, background analysis system 20, can after the data for the local discharge signal for getting threephase cable
The data to be directed into database, the exceeded measuring point of the signal in local discharge signal is found out by threshold diagnostic, then lead to
It crosses and judges whether the signal has power frequency correlation, whether the local discharge signal that can exclude the acquisition is that effective part is put
Electric signal can pass through each part under same markers if the local discharge signal of the acquisition is effective local discharge signal
Discharge signal is compared, and determines the shelf depreciation type of the threephase cable of the high-tension cable, such as can will be to same markers
Under same shelf depreciation recorder different channels acquisition local discharge signal compare and analyze, extraneous discharge stem can be excluded
It disturbs, if it find that each channel discharge signal occurs simultaneously, then can determine whether as external interference, because only a phase is pressurizeed, if only
Persistently there is discharge signal in one channel, can determine whether as those suspected defects discharge signal；The three-phase electricity to high-tension cable can be passed through
The amplitude of the local discharge signal of adjacent measurement points on cable compares and analyzes, and can determine whether out discharge defect shelf depreciation note
Record the distance of instrument, wherein the measurement point refers to the position of the local discharge signal for measuring threephase cable on high-tension cable
Point, such as the location point of local discharge sensor is installed.
According to the location point for the shelf depreciation type and the shelf depreciation defect for judging to obtain, it may be determined that high-tension cable
Shelf depreciation state of the threephase cable when carrying out pressure test.
Using the technical solution of above-described embodiment, the shelf depreciation type using high-tension cable and discharge defect position pair
Shelf depreciation state of the high-tension cable when carrying out pressure test is detected, and improves the office to the threephase cable of high-tension cable
The accuracy of portion's discharging headlamp also working efficiency.
In one embodiment, a kind of distributed local discharge detection device of high-tension cable pressure test is provided, it should
Detection device may include：Acquisition module 101, comparison module 102 and determining module 103；Wherein,
Acquisition module 101, for obtaining sheath ground connection of the threephase cable of high-tension cable when carrying out pressure test respectively
Electric current；
Comparison module 102, for the sheath grounding current of the threephase cable to be compared with the threshold value of setting；If institute
The sheath grounding current for stating threephase cable is more than the threshold value of setting, then the local discharge sensor for obtaining the threephase cable measures
The local discharge signal of the threephase cable arrived；
Determining module 103, the three-phase for determining the high-tension cable according to the local discharge signal of the threephase cable
Shelf depreciation state of the cable when carrying out pressure test.
The distributed local discharge detection device of the high-tension cable pressure test of above-described embodiment, passes through acquisition module 101
Sheath grounding current of the threephase cable of high-tension cable when carrying out pressure test is obtained respectively, it should using comparison module 102
Sheath grounding current is compared with the threshold value of setting, is passed through when the sheath grounding current of threephase cable is more than the threshold value of setting
Local discharge sensor measures the local discharge signal of threephase cable, by determining module 103 according to the shelf depreciation
Signal determines shelf depreciation state of the threephase cable in pressure test, realizes to the part during high-tension cable pressure test
Discharge signal measures, and is judged sheath grounding current using the threshold value of setting, has compressed measurement local discharge signal
Data volume, improve the working efficiency being detected to the shelf depreciation of high-tension cable.
In one embodiment, a kind of distributed partial discharge detecting system of high-tension cable pressure test is provided, is joined
Fig. 4 is examined, Fig. 4 is the structural schematic diagram of the distributed partial discharge detecting system of one embodiment medium and high voltage cable pressure test,
The distributed partial discharge detecting system of the high-tension cable pressure test may include：Set on the threephase cable 100 of high-tension cable
On local discharge sensor 300, shelf depreciation recorder 400, intelligent terminal 500 and background server 600；Wherein,
The signal input part of shelf depreciation recorder 400 is connected to local discharge sensor 300, for recording shelf depreciation
The electric signal that sensor 300 measures, including sheath grounding current of the threephase cable when carrying out pressure test of high-tension cable with
Local discharge signal；
Intelligent terminal 500, for exporting the electric signal that shelf depreciation recorder records from shelf depreciation recorder 400, and
Mode is by the electric signal transmission to background server 600 by radio communication；
Background server 600 is configured as executing the distribution of the high-tension cable pressure test described in any embodiment as above
Formula detection method for local discharge detects shelf depreciation state of the threephase cable 100 of high-tension cable when carrying out pressure test.
In the present embodiment, threephase cable 100 includes A phase cable 100a, B phase cable 100b and C phase cable 100c, each mutually electricity
Multigroup cable connector 200 can be placed on cable respectively, including No. 1 cable of cable connector 202,3 of cable connector 201,2 connects
The cable connectors such as first 203, No. 4 cable connectors 204 and No. 5 cable connectors 205.
Local discharge sensor 300 may include multigroup high frequency partial discharge sensor, each group high frequency partial electric discharge sensing
Device may include four high frequency partial discharge sensors, be respectively arranged at the cable connector of threephase cable sheath ground wire on
And near the cable connector, it can be used for measuring the local discharge signal of threephase cable, ambient noise signal and threephase cable
The electric signals such as sheath grounding current signal.
Shelf depreciation recorder 400 may include multiple four-way shelf depreciation recorders, each four-way shelf depreciation
Recorder can be discharged by four high frequency partials of coaxial cable for high frequency and each group high frequency partial discharge sensor respectively
Sensor is connected, record local discharge sensor 300 measure electric signal, may include high-tension cable threephase cable into
Sheath grounding current, local discharge signal when row pressure test and ambient noise signal.
Intelligent terminal 500 can be attached by the communication interfaces such as USB interface and shelf depreciation recorder 400, wherein
Intelligent terminal can be mobile phone, and local discharge sensor 300 is exported from shelf depreciation recorder 400 by intelligent terminal 500
The electrical signal data of measurement, intelligent terminal 500 send the data to background server 600 by wireless network again.
Background server 600 can be used for executing the distribution of the high-tension cable pressure test described in any embodiment as above
Detection method for local discharge carries out analysis and diagnosis to the electric signal during pressure test, detects the three-phase electricity of high-tension cable
Shelf depreciation state of the cable 100 when carrying out pressure test.
It, can be by as follows based on the distributed partial discharge detecting system of high-tension cable pressure test as shown in Figure 4
Step detects the shelf depreciation state of high-tension cable pressure test, and with reference to figure 5, Fig. 5 is that another embodiment medium and high voltage cable is resistance to
Press the flow chart of the distributed detection method for local discharge of experiment, the distributed Partial Discharge Detection of the high-tension cable pressure test
Method may include steps of：
Step s1 sets time four-way shelf depreciation recorder by background analysis system.
Wherein it is possible to all four-way shelf depreciation recorders are brought together, with cable and background analysis system
Server be attached, unified clock synchronization is carried out to all four-way shelf depreciation recorders by background analysis system.
Step s2 installs high frequency partial discharge sensor and four-way shelf depreciation recorder.
Before cable voltage on-test, A, B, C threephase cable sheath ground wire at each cable connector are upper and electric
Near cable joint, a high frequency partial discharge sensor is respectively installed, coaxial cable for high frequency is used in combination respectively to put four high frequency partials
Electric transducer is connected to four-way shelf depreciation recorder nearby.
Step s3 starts the experiment of cable ac voltage withstanding.
Start and the ac voltage withstanding of the threephase cable of high-tension cable is tested.
Step s4, four-way shelf depreciation recorder measure sheath grounding current signal in real time, and carry out intelligent threshold value and sentence
It is disconnected.
In this step, start four-way shelf depreciation recorder, by local discharge sensor in real time to threephase cable
Sheath grounding current measures, and step is executed when detecting any phase cable sheath earth current measured value and being more than setting value
S6, it is no to then follow the steps s5.
Step s5, measurement of partial discharge module enter standby mode.
This step be the sheath grounding current of all phase cables be less than threshold value in the case of, measurement of partial discharge module into
Enter standby mode.
Step s6, it is automatic to start measurement of partial discharge module, local discharge signal, ambient noise signal and sheath are grounded
Current signal is measured and is recorded.
This step is the office of shelf depreciation recorder in the case where the sheath grounding current of any phase cable is more than threshold value
Portion's discharge measuring module starts automatically, is measured to local discharge signal, ambient noise signal and sheath grounding current signal
And it records.
Whether step s7, the experiment of cable ac voltage withstanding replace test phase.
Wherein, after the completion of the pressure test of the single-phase cable of high-tension cable, stopping pressurizes to the phase cable, then should
The sheath grounding current measured value of phase cable is less than setting value, and the measurement of partial discharge module of shelf depreciation recorder enters standby
State, commutation under pressure, sheath grounding current measured value is more than setting value, and measurement of partial discharge module is again started up,
Local discharge signal, ambient noise signal and sheath grounding current signal are measured and recorded.
Step s8, pressure test terminate.
This step is that the pressure test of all phase cables of high-tension cable terminates.
Step s9, testing crew fetch four-way shelf depreciation recorder, are connect with mobile phone and send the data to backstage point
Analysis system.
This step is after the completion of the pressure test of all phase cables, and tester to scene remembers four-way shelf depreciation
Record instrument takes the good place of mobile phone signal, and four-way shelf depreciation recorder is connect by USB interface with mobile phone, part
The server that the data of electric discharge recording instrument record are sent to background analysis system carries out analysis and diagnosis.
Step s10, background analysis system analyze measurement of partial discharge data, judge during pressure test whether
There is shelf depreciation.
Wherein, the Data Detection high-voltage electricity that the background server of background analysis system is recorded according to shelf depreciation recorder
Shelf depreciation state of the threephase cable of cable during pressure test, such as whether there is shelf depreciation generation etc..
The distributed partial discharge detecting system for the high-tension cable pressure test that above-described embodiment provides, including it is set to high pressure
Local discharge sensor on the threephase cable of cable, shelf depreciation recorder, intelligent terminal and background server, locally put
Electrographic recording instrument records sheath grounding current and part of the threephase cable of local discharge sensor measurement when carrying out pressure test
Discharge signal, intelligent terminal export sheath grounding current and local discharge signal and by radio communication from shelf depreciation recorder
Mode is transmitted to background server, and background server detects high-tension cable according to the sheath grounding current and local discharge signal
Shelf depreciation state of the threephase cable when carrying out pressure test, realizes to the shelf depreciation during high-tension cable pressure test
Signal measures, and uses multiple four-way shelf depreciation recorders with sheath grounding current threshold decision function, real
Show and the local discharge signal during high-tension cable pressure test is measured and recorded, has had compressed the number of Partial Discharge Detection
According to amount, working efficiency when in-site measurement is substantially increased.
Each technical characteristic of embodiment described above can be combined arbitrarily, to keep description succinct, not to above-mentioned reality
It applies all possible combination of each technical characteristic in example to be all described, as long as however, the combination of these technical characteristics is not deposited
In contradiction, it is all considered to be the range of this specification record.
Several embodiments of the invention above described embodiment only expresses, the description thereof is more specific and detailed, but simultaneously
It cannot therefore be construed as limiting the scope of the patent.It should be pointed out that coming for those of ordinary skill in the art
It says, without departing from the inventive concept of the premise, various modifications and improvements can be made, these belong to the protection of the present invention
Range.Therefore, the protection domain of patent of the present invention should be determined by the appended claims.
Claims (10)
1. a kind of distributed detection method for local discharge of high-tension cable pressure test, which is characterized in that including step：
Sheath grounding current of the threephase cable of high-tension cable when carrying out pressure test is obtained respectively；
The sheath grounding current of the threephase cable is compared with the threshold value of setting；If the sheath of the threephase cable is grounded
Electric current is more than the threshold value of setting, then obtains the office for the threephase cable that the local discharge sensor of the threephase cable measures
Portion's discharge signal；
Determine the threephase cable of the high-tension cable when carrying out pressure test according to the local discharge signal of the threephase cable
Shelf depreciation state.
2. the distributed detection method for local discharge of high-tension cable pressure test according to claim 1, which is characterized in that
The step of sheath grounding current of the threephase cable when carrying out pressure test for obtaining high-tension cable respectively includes：
When the high-tension cable carries out pressure test, the threephase cable is detected by multiple high frequency partial discharge sensors
Sheath grounding current；Wherein, the multiple high frequency partial discharge sensor is respectively arranged on the cable connector of the threephase cable
On sheath ground wire.
3. the distributed detection method for local discharge of high-tension cable pressure test according to claim 2, which is characterized in that
Described the step of detecting the sheath grounding current of the threephase cable by multiple high frequency partial discharge sensors includes：
The threephase cable that the multiple high frequency partial discharge sensor measures is received by multichannel shelf depreciation recorder
Sheath ground wire current signal, obtain the sheath grounding current of the threephase cable of the high-tension cable；Wherein, described mostly logical
Each input channel of road shelf depreciation recorder is respectively connected to the multiple high frequency partial discharge sensor.
4. the distributed detection method for local discharge of high-tension cable pressure test according to claim 3, which is characterized in that
It further include step：
To multiple unified clock synchronization is carried out with the high frequency partial discharge sensor connecting multi-channel shelf depreciation recorder.
5. the distributed detection method for local discharge of high-tension cable pressure test according to claim 1, which is characterized in that
If the sheath grounding current of the threephase cable is more than the threshold value of setting, the shelf depreciation for obtaining the threephase cable passes
The step of local discharge signal for the threephase cable that sensor measures includes：
When the threephase cable any phase cable sheath grounding current be more than the setting threshold value, then pass through the three-phase
The local discharge sensor of cable measures the local discharge signal of the threephase cable of the high-tension cable.
6. the distributed detection method for local discharge of high-tension cable pressure test according to any one of claims 1 to 5,
It is characterized in that, the local discharge signal according to the threephase cable determines that the threephase cable of the high-tension cable is resistance in progress
Pressure experiment when shelf depreciation state the step of include：
According to the local discharge signal of the threephase cable of the high-tension cable determine the shelf depreciation type of the threephase cable with
And discharge defect position；
The threephase cable that the high-tension cable is obtained according to the shelf depreciation type and discharge defect position is carrying out pressure resistance
Shelf depreciation state when experiment.
7. the distributed detection method for local discharge of high-tension cable pressure test according to claim 6, which is characterized in that
The local discharge signal of the threephase cable according to the high-tension cable determine the shelf depreciation type of the threephase cable with
And the step of discharge defect position, includes：
Local discharge signal of the threephase cable of the high-tension cable under same markers is compared, determines that the part is put
Electric type；
According to the amplitude of the local discharge signal of the adjacent measurement points of the threephase cable of the high-tension cable, determine that the electric discharge lacks
Fall into position；Wherein, the measurement point is the position of the local discharge signal for measuring the threephase cable on the high-tension cable
It sets.
8. a kind of distributed local discharge detection device of high-tension cable pressure test, which is characterized in that including：
Acquisition module, for obtaining sheath grounding current of the threephase cable of high-tension cable when carrying out pressure test respectively；
Comparison module, for the sheath grounding current of the threephase cable to be compared with the threshold value of setting；If the three-phase
The sheath grounding current of cable is more than the threshold value of setting, then obtains the institute that the local discharge sensor of the threephase cable measures
State the local discharge signal of threephase cable；
Determining module, for determined according to the local discharge signal of the threephase cable threephase cable of the high-tension cable into
Shelf depreciation state when row pressure test.
9. a kind of distributed partial discharge detecting system of high-tension cable pressure test, which is characterized in that including：Set on high-voltage electricity
Local discharge sensor on the threephase cable of cable, shelf depreciation recorder, intelligent terminal and background server；Wherein,
The signal input part of the shelf depreciation recorder is connected to the local discharge sensor, is put for recording the part
The electric signal that electric transducer measures；Wherein, the electric signal includes that the threephase cable of the high-tension cable is carrying out pressure test
When sheath grounding current and local discharge signal；
The intelligent terminal, for exporting the electric signal that the shelf depreciation recorder records from the shelf depreciation recorder,
And by radio communication mode by the electric signal transmission to the background server；
The background server is configured as executing point of high-tension cable pressure test as described in any one of claim 1 to 7
Cloth detection method for local discharge detects shelf depreciation shape of the threephase cable of the high-tension cable when carrying out pressure test
State.
10. the distributed partial discharge detecting system of high-tension cable pressure test according to claim 9, feature exist
In the local discharge sensor includes multigroup high frequency partial discharge sensor；Wherein, every group of high frequency partial discharge sensor packet
Four high frequency partial discharge sensors are included, be respectively arranged on the sheath ground wire at the cable connector of the threephase cable above and are somebody's turn to do
Near cable connector；
The shelf depreciation recorder includes multiple four-way shelf depreciation recorders；Each four-way shelf depreciation record
Instrument is connect by coaxial cable for high frequency with four high frequency partial discharge sensors of each group high frequency partial discharge sensor respectively.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110850149A (en) * | 2018-08-02 | 2020-02-28 | 许继集团有限公司 | High-voltage cable metal sheath grounding monitoring method and system |
| CN112067955A (en) * | 2020-09-16 | 2020-12-11 | 杭州西湖电子研究所 | Three-phase synchronous partial discharge detection method |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004347424A (en) * | 2003-05-21 | 2004-12-09 | Fujikura Ltd | Hot-line insulation deterioration diagnostic method and its device |
| CN102368089A (en) * | 2011-11-17 | 2012-03-07 | 江苏省电力公司南京供电公司 | Test method of carrying out partial discharge measurement based on high-voltage cable voltage withstand test |
| CN202305736U (en) * | 2011-09-23 | 2012-07-04 | 山西省电力公司长治供电分公司 | Partial discharge detection device of gas insulation combination electric appliance |
| CN103197215A (en) * | 2013-04-09 | 2013-07-10 | 国家电网公司 | System and method for discharge fault location of geographic information system (GIS) alternating current (AC) voltage withstand test |
| CN103513169A (en) * | 2013-10-18 | 2014-01-15 | 国网上海市电力公司 | High voltage cable partial discharge detection method |
| CN104502812A (en) * | 2014-11-26 | 2015-04-08 | 国家电网公司 | Partial discharge acquisition method and apparatus |
| CN105765392A (en) * | 2013-11-29 | 2016-07-13 | 汉格诺Kmt缆线测量技术有限公司 | Method and device for locating partial discharges in electric cables |
| CN205720418U (en) * | 2016-06-21 | 2016-11-23 | 上海谷元电气科技有限公司 | High tension cable circulating current detector |
-
2018
- 2018-04-20 CN CN201810362055.5A patent/CN108279366B/en active Active
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2004347424A (en) * | 2003-05-21 | 2004-12-09 | Fujikura Ltd | Hot-line insulation deterioration diagnostic method and its device |
| CN202305736U (en) * | 2011-09-23 | 2012-07-04 | 山西省电力公司长治供电分公司 | Partial discharge detection device of gas insulation combination electric appliance |
| CN102368089A (en) * | 2011-11-17 | 2012-03-07 | 江苏省电力公司南京供电公司 | Test method of carrying out partial discharge measurement based on high-voltage cable voltage withstand test |
| CN103197215A (en) * | 2013-04-09 | 2013-07-10 | 国家电网公司 | System and method for discharge fault location of geographic information system (GIS) alternating current (AC) voltage withstand test |
| CN103513169A (en) * | 2013-10-18 | 2014-01-15 | 国网上海市电力公司 | High voltage cable partial discharge detection method |
| CN105765392A (en) * | 2013-11-29 | 2016-07-13 | 汉格诺Kmt缆线测量技术有限公司 | Method and device for locating partial discharges in electric cables |
| CN104502812A (en) * | 2014-11-26 | 2015-04-08 | 国家电网公司 | Partial discharge acquisition method and apparatus |
| CN205720418U (en) * | 2016-06-21 | 2016-11-23 | 上海谷元电气科技有限公司 | High tension cable circulating current detector |
Non-Patent Citations (4)
| Title |
|---|
| 朱晓辉等: "高压XLPE电缆在线监测技术研究与应用", 《中国电业（技术版）》 * |
| 雷超平等: "电缆交流耐压同步分布式局部放电测试技术", 《南方电网技术》 * |
| 马飞越: "暂态地电压与特高频法在局放检测中的应用", 《宁夏电力》 * |
| 龚士宝等: "电缆运行状态智能综合在线监测技术", 《信息通信》 * |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110850149A (en) * | 2018-08-02 | 2020-02-28 | 许继集团有限公司 | High-voltage cable metal sheath grounding monitoring method and system |
| CN110850149B (en) * | 2018-08-02 | 2021-09-14 | 许继集团有限公司 | High-voltage cable metal sheath grounding monitoring method and system |
| CN112067955A (en) * | 2020-09-16 | 2020-12-11 | 杭州西湖电子研究所 | Three-phase synchronous partial discharge detection method |
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|---|---|
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Effective date of registration: 20200925 Address after: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Patentee after: Guangzhou Power Supply Bureau of Guangdong Power Grid Co.,Ltd. Address before: 510620 Tianhe District, Guangzhou, Tianhe South Road, No. two, No. 2, No. Patentee before: GUANGZHOU POWER SUPPLY Co.,Ltd. |