CN117517905A - Non-contact type distribution cable partial discharge live detection method - Google Patents
Non-contact type distribution cable partial discharge live detection method Download PDFInfo
- Publication number
- CN117517905A CN117517905A CN202311799824.5A CN202311799824A CN117517905A CN 117517905 A CN117517905 A CN 117517905A CN 202311799824 A CN202311799824 A CN 202311799824A CN 117517905 A CN117517905 A CN 117517905A
- Authority
- CN
- China
- Prior art keywords
- partial discharge
- signal
- module
- distribution cable
- frequency
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000001514 detection method Methods 0.000 title claims abstract description 39
- 238000005259 measurement Methods 0.000 claims abstract description 39
- 238000000034 method Methods 0.000 claims abstract description 30
- 238000001914 filtration Methods 0.000 claims abstract description 11
- 238000012545 processing Methods 0.000 claims abstract description 5
- 230000004069 differentiation Effects 0.000 claims abstract description 4
- 238000004891 communication Methods 0.000 claims description 15
- 238000001228 spectrum Methods 0.000 claims description 13
- 238000005070 sampling Methods 0.000 claims description 12
- 102100025142 Beta-microseminoprotein Human genes 0.000 claims description 11
- 101000576812 Homo sapiens Beta-microseminoprotein Proteins 0.000 claims description 11
- 230000001360 synchronised effect Effects 0.000 claims description 9
- 238000012360 testing method Methods 0.000 claims description 8
- 230000001052 transient effect Effects 0.000 claims description 6
- 239000003086 colorant Substances 0.000 claims description 3
- 239000004744 fabric Substances 0.000 claims description 3
- 238000001208 nuclear magnetic resonance pulse sequence Methods 0.000 claims description 3
- 230000007613 environmental effect Effects 0.000 claims description 2
- 230000000694 effects Effects 0.000 abstract description 3
- 238000006243 chemical reaction Methods 0.000 abstract description 2
- 230000008878 coupling Effects 0.000 abstract description 2
- 238000010168 coupling process Methods 0.000 abstract description 2
- 238000005859 coupling reaction Methods 0.000 abstract description 2
- 238000000691 measurement method Methods 0.000 abstract description 2
- 238000009413 insulation Methods 0.000 description 4
- 230000015556 catabolic process Effects 0.000 description 3
- 238000006731 degradation reaction Methods 0.000 description 2
- 238000010586 diagram Methods 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 230000008030 elimination Effects 0.000 description 1
- 238000003379 elimination reaction Methods 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
Classifications
-
- 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
-
- 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
- G01R31/1209—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 using acoustic measurements
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S10/00—Systems supporting electrical power generation, transmission or distribution
- Y04S10/50—Systems or methods supporting the power network operation or management, involving a certain degree of interaction with the load-side end user applications
- Y04S10/52—Outage or fault management, e.g. fault detection or location
Abstract
The invention discloses a non-contact type distribution cable partial discharge live detection method, which comprises the following steps: step one, constructing a non-contact detection system; step two, system differentiation setting; selecting a special power distribution cable detection mode; step four, measuring by adopting a high/special wiring; step five, obtaining a noise filtering measurement result; step six, result comparison analysis; the invention adopts a non-contact measurement method, adopts a high-frequency and ultrahigh-frequency detection difference characteristic and a coupling comparison mode to capture the cable partial discharge signal, solves the problem that the existing method cannot be suitable for a closed structure of a cable terminal of a power distribution network, adopts a high-precision AD conversion and high-speed digital signal processing chip to process digital signals, has good anti-interference performance and measurement precision, and achieves good anti-interference effect by connecting a band-stop filter in series between an ultrahigh-frequency terminal and a signal line of a system.
Description
Technical Field
The invention relates to the technical field of partial discharge detection, in particular to a non-contact type distribution cable partial discharge live detection method.
Background
Partial discharge is a sign and manifestation of insulation degradation of electrical equipment and is a cause of further insulation degradation. Since the consequences of insulation breakdown are often severe, it is particularly important to detect partial discharge of electrical equipment. Partial discharges of electrical devices belong to electrical discharges that do not completely short the electrodes. Such discharge amplitudes are typically small, but they can continue to degrade insulation, possibly leading to eventual failure. The existing partial discharge detection method has the following defects: firstly, the anti-interference effect is poor, and the detection result is easily influenced by signal interference; secondly, the visual effect of the test data is single, so that the analysis of the test result is inconvenient; thirdly, the prior art adopts contact type HFCT wiring to measure and detect partial discharge aiming at a power cable, and the prior art cannot be suitable for a closed type structure of a power distribution network cable terminal.
Disclosure of Invention
The invention aims to provide a non-contact type distribution cable partial discharge live detection method for solving the problems in the background technology.
In order to achieve the above purpose, the present invention provides the following technical solutions: a non-contact type distribution cable partial discharge live detection method comprises the following steps: step one, constructing a non-contact detection system; step two, system differentiation setting; selecting a special power distribution cable detection mode; step four, measuring by adopting a high/special wiring; step five, obtaining a noise filtering measurement result; step six, result comparison analysis;
in the first step, a non-contact partial discharge live detection system is established;
in the second step, starting a host, and setting the non-contact partial discharge live detection system established in the first step;
in the third step, a special mode for detecting the distribution cable is selected, and ultrahigh frequency measurement and pulse current partial discharge measurement are adopted;
in the fourth step, the line connection is performed according to the measurement mode adopted in the third step;
in the fifth step, a noise filtering measurement result is obtained through a host;
in the sixth step, the phase straight line spectrum, the PRPD spectrum and the PRPS spectrum are checked by the host computer, and the measurement result is analyzed.
Preferably, in the first step, the detection system includes a host, a signal line and a data acquisition module, where the host includes a processor, a display module, a key module, a storage module, a communication module, an FPGA digital signal processing module, a signal synchronization module, a high-speed AD sampling module, a hardware filtering module and an interface module, which are integrated on a circuit board, and the processor model is cotex A9.
Preferably, the communication module comprises a WIFI communication sub-module, a Bluetooth communication sub-module and a 4G communication sub-module.
Preferably, the data acquisition module comprises a contact type ultrasonic sensor, an ultrahigh frequency sensor, a high frequency transformer, an ultrasonic wave collector and a transient ground electric wave sensor, wherein the contact type ultrasonic sensor, the ultrahigh frequency sensor, the high frequency transformer, the ultrasonic wave collector and the transient ground electric wave sensor are electrically connected with a host through signal wires, and shielding cloth is arranged on a base of the ultrahigh frequency sensor.
Preferably, in the second step, the specific steps are: the method comprises the steps of setting a synchronous mode, synchronous frequency, screen recording period, partial discharge PRPD/pulse sequence PRPS display mode of phase resolution, system date and time, WIFI enabling, software upgrading, factory setting and language selection.
Preferably, in the third step, when the ultrahigh frequency measurement is adopted, the following parameters need to be set: note the threshold, i.e., the first level pre-alarm threshold of the partial discharge signal; a warning threshold, namely a second-stage warning threshold of the partial discharge signal; a counting threshold value, namely a quantity threshold value of the partial discharge signal early warning prompt; background signal, i.e. the background noise value of the current test; phase offset, i.e. the phase offset of the current measurement signal; background cancellation, i.e., the measured waveform amplitude minus the background signal amplitude.
Preferably, in the third step, in the special mode for detecting the distribution cable, the principle of partial discharge positioning is as follows: using 2 high-frequency partial discharge synchronous acquisition channels, synchronously testing charge indicators of adjacent interval switch cabinets, and judging which interval the partial discharge comes from by comparing signal arrival time; through 1 high-frequency partial discharge and 1 ultrahigh frequency partial discharge acquisition channels, the interval high-frequency signals and the ultrahigh frequency signals are synchronously acquired, if the ultrahigh frequency signals exist at the same time when the high-frequency signals occur, the partial discharge signals are partial discharge signals in a switch cabinet, otherwise, the partial discharge signals are cable partial discharge signals, and the partial discharge positioning principle formula is as follows:
wherein l is the total length of the cable, and v is the pulse wave velocity.
Preferably, in the fourth step, the method for ultra-high frequency measurement connection specifically includes: connecting an ultrahigh frequency antenna to a UHF terminal of a host computer through a signal line; the pulse current partial discharge measuring wiring method specifically comprises the following steps: the radio frequency signal wire is connected to the pulse signal terminal of the host computer, and the other end of the radio frequency signal wire is connected to the nuclear phase hole of the switch cabinet charge indicator in a gun inserting mode.
Preferably, in the fourth step, an environmental value needs to be measured before measurement to exclude an interference source, and when ultrahigh frequency measurement is performed, when a large signal interference exists in the measurement environment, a band-stop filter needs to be connected between an ultrahigh frequency terminal and a signal line of the system in series, so that clutter interference is filtered.
Preferably, in the sixth step, the PRPD map shows the relationship between the intensity, the phase and the number of discharges of the partial discharge signal in 50 effective sampling periods, the signal is displayed with green dots below the attention threshold, the dots from light yellow to dark brown above the attention threshold indicate that the number of aggregated discharges is greater at the discharge intensity; the PRPS map displays the relationship among the intensity, the phase and the time of partial discharge signals in 50 effective sampling periods, the signals are not displayed below an attention threshold value by default, are displayed by yellow pulses above the attention threshold value, are displayed by red pulses above a warning threshold value, and the partial discharge signals in the last 50 effective sampling periods are displayed in a 3D waveform mode; the phase linear pattern shows a linear pattern of the sampled signal in one period, wherein the Y-axis represents the peak value, the X-axis represents the phase, and the displayed waveform shows different colors according to the relation with the threshold value.
Compared with the prior art, the invention has the beneficial effects that: the invention adopts a non-contact measurement method, adopts a high-frequency and ultrahigh-frequency detection difference characteristic and a coupling comparison mode to capture the cable partial discharge signal, solves the problem that the existing method cannot be suitable for a closed structure of a cable terminal of a power distribution network, adopts a high-precision AD conversion and high-speed digital signal processing chip to process digital signals, has good anti-interference performance and measurement precision, and achieves good anti-interference effect by connecting a band-stop filter in series between an ultrahigh-frequency terminal and a signal line of a system.
Drawings
FIG. 1 is a schematic diagram of a partial discharge positioning;
FIG. 2 is a PRPD and PRPS profile window;
FIG. 3 is a view of a phase alignment map;
FIG. 4 is a very high frequency detection parameter setting interface;
FIG. 5 is a block diagram of a partial discharge live detection system according to the present invention;
fig. 6 is a flow chart of the method of the present invention.
Detailed Description
The following description of the embodiments of the present invention will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present invention, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the invention without making any inventive effort, are intended to be within the scope of the invention.
Referring to fig. 1-6, an embodiment of the present invention is provided: a non-contact type distribution cable partial discharge live detection method comprises the following steps: step one, constructing a non-contact detection system; step two, system differentiation setting; selecting a special power distribution cable detection mode; step four, measuring by adopting a high/special wiring; step five, obtaining a noise filtering measurement result; step six, result comparison analysis;
in the first step, a non-contact partial discharge live detection system is established, the detection system comprises a host, a signal wire and a data acquisition module, the host comprises a processor, a display module, a key module, a storage module, a communication module, an FPGA digital signal processing module, a signal synchronization module, a high-speed AD sampling module, a hardware filtering module and an interface module which are integrated on a circuit board, the processor model is CORTEX A9, the communication module comprises a WIFI communication sub-module, a Bluetooth communication sub-module and a 4G communication sub-module, the data acquisition module comprises a contact type ultrasonic sensor, an ultrahigh frequency sensor, a high frequency transformer, an ultrasonic wave collector and a transient ground wave sensor, the contact type ultrasonic sensor, the ultrahigh frequency sensor, the high frequency transformer, the ultrasonic wave collector and the transient ground wave sensor are electrically connected with the host through the signal wire, and shielding cloth is arranged on a base of the ultrahigh frequency sensor;
in the second step, the host is started to set the non-contact partial discharge live detection system established in the first step, specifically: setting a synchronous mode, a synchronous frequency, a screen recording period, a partial discharge PRPD/phase-resolved pulse sequence PRPS display mode, a system date and time, WIFI enabling, software upgrading, factory setting and language selection;
in the third step, a special mode for detecting the distribution cable is selected, the ultrahigh frequency measurement and the pulse current partial discharge measurement are adopted, and when the ultrahigh frequency measurement is adopted, the following parameters are required to be set: note the threshold, i.e., the first level pre-alarm threshold of the partial discharge signal; a warning threshold, namely a second-stage warning threshold of the partial discharge signal; a counting threshold value, namely a quantity threshold value of the partial discharge signal early warning prompt; background signal, i.e. the background noise value of the current test; phase offset, i.e. the phase offset of the current measurement signal; background elimination, namely subtracting the background signal amplitude from the measured waveform amplitude; under the special mode of distribution cable detection, the local discharge positioning principle is as follows: using 2 high-frequency partial discharge synchronous acquisition channels, synchronously testing charge indicators of adjacent interval switch cabinets, and judging which interval the partial discharge comes from by comparing signal arrival time; through 1 high-frequency partial discharge and 1 ultrahigh frequency partial discharge acquisition channels, the interval high-frequency signals and the ultrahigh frequency signals are synchronously acquired, if the ultrahigh frequency signals exist at the same time when the high-frequency signals occur, the partial discharge signals are partial discharge signals in a switch cabinet, otherwise, the partial discharge signals are cable partial discharge signals, and the partial discharge positioning principle formula is as follows:
wherein l is the total length of the cable, and v is the pulse wave velocity;
in the fourth step, according to the measurement mode adopted in the third step, the line connection is performed, and the ultra-high frequency measurement wiring method specifically comprises the following steps: connecting an ultrahigh frequency antenna to a UHF terminal of a host computer through a signal line; the pulse current partial discharge measuring wiring method specifically comprises the following steps: connecting a radio frequency signal wire to a pulse signal terminal of a host, and connecting the other end of the radio frequency signal wire to a nuclear phase hole of a switch cabinet charge indicator in a gun inserting manner; when the ultra-high frequency measurement is carried out, a band-stop filter is required to be connected between an ultra-high frequency terminal and a signal line of the system in series so as to filter clutter interference;
in the fifth step, a noise filtering measurement result is obtained through a host;
in the sixth step, the host checks the phase straight line spectrum, the PRPD spectrum and the PRPS spectrum, analyzes the measurement result, and the PRPD spectrum displays the relationship among the intensity, the phase and the discharge times of the partial discharge signal in 50 effective sampling periods, the signal is displayed with green dots below the attention threshold, the dots from light yellow to dark brown above the attention threshold represent the more concentrated discharge times under the discharge intensity; the PRPS map displays the relationship among the intensity, the phase and the time of partial discharge signals in 50 effective sampling periods, the signals are not displayed below an attention threshold value by default, are displayed by yellow pulses above the attention threshold value, are displayed by red pulses above a warning threshold value, and the partial discharge signals in the last 50 effective sampling periods are displayed in a 3D waveform mode; the phase linear pattern shows a linear pattern of the sampled signal in one period, wherein the Y-axis represents the peak value, the X-axis represents the phase, and the displayed waveform shows different colors according to the relation with the threshold value.
Based on the above, the invention has the advantages that when the invention is used, a non-contact detection system is firstly constructed, a special detection mode of a distribution cable is selected after the system is set, wiring measurement is carried out, noise filtering measurement results are obtained, finally, detection data are analyzed through a phase straight line spectrum, a PRPD spectrum and a PRPS spectrum.
It will be evident to those skilled in the art that the invention is not limited to the details of the foregoing illustrative embodiments, and that the present invention may be embodied in other specific forms without departing from the spirit or essential characteristics thereof. The present embodiments are, therefore, to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.
Claims (10)
1. A non-contact type distribution cable partial discharge live detection method comprises the following steps: step one, constructing a non-contact detection system; step two, system differentiation setting; selecting a special power distribution cable detection mode; step four, measuring by adopting a high/special wiring; step five, obtaining a noise filtering measurement result; step six, result comparison analysis; the method is characterized in that:
in the first step, a non-contact partial discharge live detection system is established;
in the second step, starting a host, and setting the non-contact partial discharge live detection system established in the first step;
in the third step, a special mode for detecting the distribution cable is selected, and ultrahigh frequency measurement and pulse current partial discharge measurement are adopted;
in the fourth step, the line connection is performed according to the measurement mode adopted in the third step;
in the fifth step, a noise filtering measurement result is obtained through a host;
in the sixth step, the phase straight line spectrum, the PRPD spectrum and the PRPS spectrum are checked by the host computer, and the measurement result is analyzed.
2. The method for detecting partial discharge live of a non-contact distribution cable according to claim 1, wherein the method comprises the following steps: in the first step, the detection system comprises a host, a signal wire and a data acquisition module, wherein the host comprises a processor, a display module, a key module, a storage module, a communication module, an FPGA digital signal processing module, a signal synchronization module, a high-speed AD sampling module, a hardware filtering module and an interface module which are integrated on a circuit board, and the model of the processor is CORTEX A9.
3. The non-contact distribution cable partial discharge live detection method according to claim 2, wherein the method comprises the following steps: the communication module comprises a WIFI communication sub-module, a Bluetooth communication sub-module and a 4G communication sub-module.
4. The non-contact distribution cable partial discharge live detection method according to claim 2, wherein the method comprises the following steps: the data acquisition module comprises a contact type ultrasonic sensor, an ultrahigh frequency sensor, a high frequency transformer, an ultrasonic wave collector and a transient ground electric wave sensor, wherein the contact type ultrasonic sensor, the ultrahigh frequency sensor, the high frequency transformer, the ultrasonic wave collector and the transient ground electric wave sensor are electrically connected with a host through signal wires, and shielding cloth is arranged on a base of the ultrahigh frequency sensor.
5. The method for detecting partial discharge live of a non-contact distribution cable according to claim 1, wherein the method comprises the following steps: in the second step, specifically: the method comprises the steps of setting a synchronous mode, synchronous frequency, screen recording period, partial discharge PRPD/pulse sequence PRPS display mode of phase resolution, system date and time, WIFI enabling, software upgrading, factory setting and language selection.
6. The method for detecting partial discharge live of a non-contact distribution cable according to claim 1, wherein the method comprises the following steps: in the third step, when ultrahigh frequency measurement is adopted, the following parameters are required to be set: note the threshold, i.e., the first level pre-alarm threshold of the partial discharge signal; a warning threshold, namely a second-stage warning threshold of the partial discharge signal; a counting threshold value, namely a quantity threshold value of the partial discharge signal early warning prompt; background signal, i.e. the background noise value of the current test; phase offset, i.e. the phase offset of the current measurement signal; background cancellation, i.e., the measured waveform amplitude minus the background signal amplitude.
7. The method for detecting partial discharge live of a non-contact distribution cable according to claim 1, wherein the method comprises the following steps: in the third step, under the special mode of power distribution cable detection, the principle of partial discharge positioning is as follows: using 2 high-frequency partial discharge synchronous acquisition channels, synchronously testing charge indicators of adjacent interval switch cabinets, and judging which interval the partial discharge comes from by comparing signal arrival time; through 1 high-frequency partial discharge and 1 ultrahigh frequency partial discharge acquisition channels, the interval high-frequency signals and the ultrahigh frequency signals are synchronously acquired, if the ultrahigh frequency signals exist at the same time when the high-frequency signals occur, the partial discharge signals are partial discharge signals in a switch cabinet, otherwise, the partial discharge signals are cable partial discharge signals, and the partial discharge positioning principle formula is as follows:
wherein l is the total length of the cable, and v is the pulse wave velocity.
8. The method for detecting partial discharge live of a non-contact distribution cable according to claim 1, wherein the method comprises the following steps: in the fourth step, the ultra-high frequency measurement wiring method specifically comprises the following steps: connecting an ultrahigh frequency antenna to a UHF terminal of a host computer through a signal line; the pulse current partial discharge measuring wiring method specifically comprises the following steps: the radio frequency signal wire is connected to the pulse signal terminal of the host computer, and the other end of the radio frequency signal wire is connected to the nuclear phase hole of the switch cabinet charge indicator in a gun inserting mode.
9. The method for detecting partial discharge live of a non-contact distribution cable according to claim 1, wherein the method comprises the following steps: in the fourth step, the environmental value is required to be measured before the measurement is performed to eliminate the interference source, and when the ultrahigh frequency measurement is performed, the band-stop filter is required to be connected between the ultrahigh frequency terminal of the system and the signal line in series when the measurement environment has larger signal interference, so that clutter interference is filtered.
10. The method for detecting partial discharge live of a non-contact distribution cable according to claim 1, wherein the method comprises the following steps: in the step six, the PRPD map shows the relationship between the intensity, the phase and the discharge times of the partial discharge signal in 50 effective sampling periods, the signal is displayed by green dots below the attention threshold, the dots from light yellow to dark brown above the attention threshold represent the more the accumulated discharge times under the discharge intensity, and the darker the color represents the discharge intensity; the PRPS map displays the relationship among the intensity, the phase and the time of partial discharge signals in 50 effective sampling periods, the signals are not displayed below an attention threshold value by default, are displayed by yellow pulses above the attention threshold value, are displayed by red pulses above a warning threshold value, and the partial discharge signals in the last 50 effective sampling periods are displayed in a 3D waveform mode; the phase linear pattern shows a linear pattern of the sampled signal in one period, wherein the Y-axis represents the peak value, the X-axis represents the phase, and the displayed waveform shows different colors according to the relation with the threshold value.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311799824.5A CN117517905A (en) | 2023-12-26 | 2023-12-26 | Non-contact type distribution cable partial discharge live detection method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202311799824.5A CN117517905A (en) | 2023-12-26 | 2023-12-26 | Non-contact type distribution cable partial discharge live detection method |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN117517905A true CN117517905A (en) | 2024-02-06 |
Family
ID=89742242
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202311799824.5A Pending CN117517905A (en) | 2023-12-26 | 2023-12-26 | Non-contact type distribution cable partial discharge live detection method |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN117517905A (en) |
-
2023
- 2023-12-26 CN CN202311799824.5A patent/CN117517905A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN103675623B (en) | GIS partial discharge detection method and system under a kind of surge voltage | |
| CN106990340B (en) | Partial discharge monitoring system and method | |
| CN103913679B (en) | High-tension switch cabinet partial discharge monitoring system | |
| CN105606975A (en) | Localizable ultrahigh-frequency cable partial discharge detection method and device | |
| CN108710074A (en) | A kind of partial discharge of switchgear detecting system based on Radio Transmission Technology | |
| CN111830375B (en) | Cable online monitoring device and method capable of positioning insulation defects | |
| CN109541412A (en) | Transformer overvoltage and partial discharge comprehensive monitor system and method based on bottom shielding of bushing | |
| CN109799434A (en) | PD Pattern Recognition system and method | |
| CN203658526U (en) | Live-line detection device used for partial discharging of distribution cable | |
| CN103176113A (en) | Gas insulated switchgear (GIS) partial discharge calibration method and system | |
| JP2001133506A (en) | Method and device for diagnosing compressed gas insulation equipment | |
| CN113985223A (en) | Multi-parameter intelligent identification system of high-voltage dry-type sleeve and application | |
| CN111044792A (en) | High-voltage cable dielectric loss live detection system and method | |
| CN103713244A (en) | Electrified detection device and method used for local discharging of distributing cables | |
| CN108680843A (en) | A kind of method for detection of partial discharge of switch cabinet based on Radio Transmission Technology | |
| CN212905251U (en) | GIS sound and electricity combined partial discharge detector | |
| CN111707910B (en) | Porcelain insulator inner insulation detection method and porcelain insulator detection circuit | |
| US8193818B2 (en) | Partial corona discharge detection | |
| CN216900776U (en) | Digital partial discharge tester | |
| CN210199207U (en) | Ultralow frequency dielectric loss test system | |
| Beyer et al. | A new method for detection and location of distributed partial discharges (cable faults) in high voltage cables under external interference | |
| CN114280427A (en) | Local discharge distributed monitoring and early warning method based on ground electric waves of switch cabinet | |
| CN117517905A (en) | Non-contact type distribution cable partial discharge live detection method | |
| CN110554291A (en) | Partial discharge signal envelope detection device | |
| Stone et al. | A Review of the History of the Development of Partial Discharge Testing |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |